diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4a4cb4b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,16 @@
+target
+.classpath
+.settings
+.project
+ClusterControllerService
+actual
+build
+edu.uci.ics.hyracks.control.nc.NodeControllerService
+exception
+expected
+teststore1
+teststore2
+derby.log
+hadoop-conf-tmp
+metastore_db
+teststore
\ No newline at end of file
diff --git a/algebricks/algebricks-common/pom.xml b/algebricks/algebricks-common/pom.xml
index 13f879b..8311b8a 100644
--- a/algebricks/algebricks-common/pom.xml
+++ b/algebricks/algebricks-common/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,7 +27,7 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-api</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-compiler/pom.xml b/algebricks/algebricks-compiler/pom.xml
index 9527512..74a8ef7 100644
--- a/algebricks/algebricks-compiler/pom.xml
+++ b/algebricks/algebricks-compiler/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,12 +27,12 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-rewriter</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-core</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-compiler/src/main/java/edu/uci/ics/hyracks/algebricks/compiler/api/HeuristicCompilerFactoryBuilder.java b/algebricks/algebricks-compiler/src/main/java/edu/uci/ics/hyracks/algebricks/compiler/api/HeuristicCompilerFactoryBuilder.java
index edc1b66..2b24bd0 100644
--- a/algebricks/algebricks-compiler/src/main/java/edu/uci/ics/hyracks/algebricks/compiler/api/HeuristicCompilerFactoryBuilder.java
+++ b/algebricks/algebricks-compiler/src/main/java/edu/uci/ics/hyracks/algebricks/compiler/api/HeuristicCompilerFactoryBuilder.java
@@ -29,6 +29,7 @@
 import edu.uci.ics.hyracks.algebricks.core.rewriter.base.HeuristicOptimizer;
 import edu.uci.ics.hyracks.algebricks.core.rewriter.base.IOptimizationContextFactory;
 import edu.uci.ics.hyracks.algebricks.core.rewriter.base.PhysicalOptimizationConfig;
+import edu.uci.ics.hyracks.api.job.IJobletEventListenerFactory;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 
 public class HeuristicCompilerFactoryBuilder extends AbstractCompilerFactoryBuilder {
@@ -81,7 +82,8 @@
                     }
 
                     @Override
-                    public JobSpecification createJob(Object appContext) throws AlgebricksException {
+                    public JobSpecification createJob(Object appContext,
+                            IJobletEventListenerFactory jobEventListenerFactory) throws AlgebricksException {
                         AlgebricksConfig.ALGEBRICKS_LOGGER.fine("Starting Job Generation.\n");
                         JobGenContext context = new JobGenContext(null, metadata, appContext,
                                 serializerDeserializerProvider, hashFunctionFactoryProvider,
@@ -91,7 +93,7 @@
                                 expressionTypeComputer, nullableTypeComputer, oc, expressionEvalSizeComputer,
                                 partialAggregationTypeComputer, frameSize, clusterLocations);
                         PlanCompiler pc = new PlanCompiler(context);
-                        return pc.compilePlan(plan, null);
+                        return pc.compilePlan(plan, null, jobEventListenerFactory);
                     }
                 };
             }
diff --git a/algebricks/algebricks-compiler/src/main/java/edu/uci/ics/hyracks/algebricks/compiler/api/ICompiler.java b/algebricks/algebricks-compiler/src/main/java/edu/uci/ics/hyracks/algebricks/compiler/api/ICompiler.java
index 9146722..517ca6b 100644
--- a/algebricks/algebricks-compiler/src/main/java/edu/uci/ics/hyracks/algebricks/compiler/api/ICompiler.java
+++ b/algebricks/algebricks-compiler/src/main/java/edu/uci/ics/hyracks/algebricks/compiler/api/ICompiler.java
@@ -15,10 +15,12 @@
 package edu.uci.ics.hyracks.algebricks.compiler.api;
 
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.api.job.IJobletEventListenerFactory;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 
 public interface ICompiler {
     public void optimize() throws AlgebricksException;
 
-    public JobSpecification createJob(Object appContext) throws AlgebricksException;
+    public JobSpecification createJob(Object appContext, IJobletEventListenerFactory jobEventListenerFactory)
+            throws AlgebricksException;
 }
diff --git a/algebricks/algebricks-core/pom.xml b/algebricks/algebricks-core/pom.xml
index 27ce778..dc2ddd0 100644
--- a/algebricks/algebricks-core/pom.xml
+++ b/algebricks/algebricks-core/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,27 +27,27 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-storage-am-btree</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-storage-am-rtree</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-dataflow-std</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-runtime</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-common</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/base/PhysicalOperatorTag.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/base/PhysicalOperatorTag.java
index 32cfb9a..0efb5ff 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/base/PhysicalOperatorTag.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/base/PhysicalOperatorTag.java
@@ -43,7 +43,9 @@
     WRITE_RESULT,
     INSERT_DELETE,
     INDEX_INSERT_DELETE,
-	UPDATE,
+    UPDATE,
     INVERTED_INDEX_SEARCH,
-    PARTITIONINGSPLIT
+    FUZZY_INVERTED_INDEX_SEARCH,
+    PARTITIONINGSPLIT,
+    EXTENSION_OPERATOR
 }
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/metadata/IMetadataProvider.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/metadata/IMetadataProvider.java
index 82187e3..73da206 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/metadata/IMetadataProvider.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/metadata/IMetadataProvider.java
@@ -42,8 +42,8 @@
      */
     public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getScannerRuntime(IDataSource<S> dataSource,
             List<LogicalVariable> scanVariables, List<LogicalVariable> projectVariables, boolean projectPushed,
-            IOperatorSchema opSchema, IVariableTypeEnvironment typeEnv, JobGenContext context, JobSpecification jobSpec)
-            throws AlgebricksException;
+            IOperatorSchema opSchema, IVariableTypeEnvironment typeEnv, JobGenContext context,
+            JobSpecification jobSpec, Object implConfig) throws AlgebricksException;
 
     public boolean scannerOperatorIsLeaf(IDataSource<S> dataSource);
 
@@ -60,12 +60,14 @@
             JobGenContext context, JobSpecification jobSpec) throws AlgebricksException;
 
     public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getInsertRuntime(IDataSource<S> dataSource,
-            IOperatorSchema propagatedSchema, List<LogicalVariable> keys, LogicalVariable payLoadVar,
-            RecordDescriptor recordDesc, JobGenContext context, JobSpecification jobSpec) throws AlgebricksException;
+            IOperatorSchema propagatedSchema, IVariableTypeEnvironment typeEnv, List<LogicalVariable> keys,
+            LogicalVariable payLoadVar, RecordDescriptor recordDesc, JobGenContext context, JobSpecification jobSpec)
+            throws AlgebricksException;
 
     public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getDeleteRuntime(IDataSource<S> dataSource,
-            IOperatorSchema propagatedSchema, List<LogicalVariable> keys, LogicalVariable payLoadVar,
-            RecordDescriptor recordDesc, JobGenContext context, JobSpecification jobSpec) throws AlgebricksException;
+            IOperatorSchema propagatedSchema, IVariableTypeEnvironment typeEnv, List<LogicalVariable> keys,
+            LogicalVariable payLoadVar, RecordDescriptor recordDesc, JobGenContext context, JobSpecification jobSpec)
+            throws AlgebricksException;
 
     /**
      * Creates the insert runtime of IndexInsertDeletePOperator, which models
@@ -140,4 +142,5 @@
     public IDataSourceIndex<I, S> findDataSourceIndex(I indexId, S dataSourceId) throws AlgebricksException;
 
     public IFunctionInfo lookupFunction(FunctionIdentifier fid);
+
 }
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/AbstractPhysicalOperator.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/AbstractPhysicalOperator.java
index c5f4c71..545d039 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/AbstractPhysicalOperator.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/AbstractPhysicalOperator.java
@@ -104,7 +104,7 @@
         if (p.getRoots().size() > 1) {
             throw new NotImplementedException("Nested plans with several roots are not supported.");
         }
-        JobSpecification nestedJob = pc.compilePlan(p, outerPlanSchema);
+        JobSpecification nestedJob = pc.compilePlan(p, outerPlanSchema, null);
         ILogicalOperator topOpInSubplan = p.getRoots().get(0).getValue();
         JobGenContext context = pc.getContext();
         IOperatorSchema topOpInSubplanScm = context.getSchema(topOpInSubplan);
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/DataSourceScanPOperator.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/DataSourceScanPOperator.java
index a2dac3f..526c37f 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/DataSourceScanPOperator.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/DataSourceScanPOperator.java
@@ -37,11 +37,20 @@
 public class DataSourceScanPOperator extends AbstractScanPOperator {
 
     private IDataSource<?> dataSource;
+    private Object implConfig;
 
     public DataSourceScanPOperator(IDataSource<?> dataSource) {
         this.dataSource = dataSource;
     }
 
+    public void setImplConfig(Object implConfig) {
+        this.implConfig = implConfig;
+    }
+
+    public Object getImplConfig() {
+        return implConfig;
+    }
+
     @Override
     public PhysicalOperatorTag getOperatorTag() {
         return PhysicalOperatorTag.DATASOURCE_SCAN;
@@ -71,7 +80,7 @@
         List<LogicalVariable> vars = scan.getVariables();
         List<LogicalVariable> projectVars = scan.getProjectVariables();
         Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> p = mp.getScannerRuntime(dataSource, vars,
-                projectVars, scan.isProjectPushed(), opSchema, typeEnv, context, builder.getJobSpec());
+                projectVars, scan.isProjectPushed(), opSchema, typeEnv, context, builder.getJobSpec(), implConfig);
         builder.contributeHyracksOperator(scan, p.first);
         if (p.second != null) {
             builder.contributeAlgebricksPartitionConstraint(p.first, p.second);
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/InMemoryHashJoinPOperator.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/InMemoryHashJoinPOperator.java
index 563fcc5..b09c194 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/InMemoryHashJoinPOperator.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/InMemoryHashJoinPOperator.java
@@ -28,7 +28,6 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractBinaryJoinOperator.JoinKind;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.IOperatorSchema;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.OrderOperator.IOrder.OrderKind;
 import edu.uci.ics.hyracks.algebricks.core.algebra.properties.ILocalStructuralProperty;
 import edu.uci.ics.hyracks.algebricks.core.algebra.properties.IPhysicalPropertiesVector;
 import edu.uci.ics.hyracks.algebricks.core.jobgen.impl.JobGenContext;
@@ -87,7 +86,8 @@
             Object t = env.getVarType(v);
             comparatorFactories[i++] = bcfp.getBinaryComparatorFactory(t, true);
         }
-        RecordDescriptor recDescriptor = JobGenHelper.mkRecordDescriptor(context.getTypeEnvironment(op), propagatedSchema, context);
+        RecordDescriptor recDescriptor = JobGenHelper.mkRecordDescriptor(context.getTypeEnvironment(op),
+                propagatedSchema, context);
         IOperatorDescriptorRegistry spec = builder.getJobSpec();
         IOperatorDescriptor opDesc = null;
 
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/InsertDeletePOperator.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/InsertDeletePOperator.java
index 477d257..3e2827b 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/InsertDeletePOperator.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/InsertDeletePOperator.java
@@ -11,6 +11,7 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.IOptimizationContext;
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.PhysicalOperatorTag;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
 import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IDataSource;
 import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator;
@@ -70,17 +71,19 @@
             throws AlgebricksException {
         InsertDeleteOperator insertDeleteOp = (InsertDeleteOperator) op;
         IMetadataProvider mp = context.getMetadataProvider();
+        IVariableTypeEnvironment typeEnv = context.getTypeEnvironment(op);
         JobSpecification spec = builder.getJobSpec();
-        RecordDescriptor inputDesc = JobGenHelper.mkRecordDescriptor(context.getTypeEnvironment(op.getInputs().get(0).getValue()), inputSchemas[0],
-                context);
+        RecordDescriptor inputDesc = JobGenHelper.mkRecordDescriptor(
+                context.getTypeEnvironment(op.getInputs().get(0).getValue()), inputSchemas[0], context);
 
         Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> runtimeAndConstraints = null;
-        if (insertDeleteOp.getOperation() == Kind.INSERT)
-            runtimeAndConstraints = mp.getInsertRuntime(dataSource, propagatedSchema, keys, payload, inputDesc,
-                    context, spec);
-        else
-            runtimeAndConstraints = mp.getDeleteRuntime(dataSource, propagatedSchema, keys, payload, inputDesc,
-                    context, spec);
+        if (insertDeleteOp.getOperation() == Kind.INSERT) {
+            runtimeAndConstraints = mp.getInsertRuntime(dataSource, propagatedSchema, typeEnv, keys, payload,
+                    inputDesc, context, spec);
+        } else {
+            runtimeAndConstraints = mp.getDeleteRuntime(dataSource, propagatedSchema, typeEnv, keys, payload,
+                    inputDesc, context, spec);
+        }
 
         builder.contributeHyracksOperator(insertDeleteOp, runtimeAndConstraints.first);
         builder.contributeAlgebricksPartitionConstraint(runtimeAndConstraints.first, runtimeAndConstraints.second);
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/NLJoinPOperator.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/NLJoinPOperator.java
index d153f90..5e8b59e 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/NLJoinPOperator.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/NLJoinPOperator.java
@@ -57,8 +57,13 @@
 import edu.uci.ics.hyracks.dataflow.std.join.NestedLoopJoinOperatorDescriptor;
 
 /**
+ * <<<<<<< .working
  * Left input is broadcast and preserves its local properties. Right input can
  * be partitioned in any way.
+ * =======
+ * Left input is broadcast and preserves its local properties.
+ * Right input can be partitioned in any way.
+ * >>>>>>> .merge-right.r3014
  */
 public class NLJoinPOperator extends AbstractJoinPOperator {
 
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/StringStreamingScriptPOperator.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/StringStreamingScriptPOperator.java
index 52f8e0b..a4642bb 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/StringStreamingScriptPOperator.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/StringStreamingScriptPOperator.java
@@ -61,7 +61,8 @@
         StringStreamingScriptDescription sssd = (StringStreamingScriptDescription) scriptDesc;
         StringStreamingRuntimeFactory runtime = new StringStreamingRuntimeFactory(sssd.getCommand(),
                 sssd.getPrinterFactories(), sssd.getFieldDelimiter(), sssd.getParserFactory());
-        RecordDescriptor recDesc = JobGenHelper.mkRecordDescriptor(context.getTypeEnvironment(op), propagatedSchema, context);
+        RecordDescriptor recDesc = JobGenHelper.mkRecordDescriptor(context.getTypeEnvironment(op), propagatedSchema,
+                context);
         builder.contributeMicroOperator(scriptOp, runtime, recDesc);
         // and contribute one edge from its child
         ILogicalOperator src = scriptOp.getInputs().get(0).getValue();
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/config/AlgebricksConfig.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/config/AlgebricksConfig.java
index 11ec043..061dbe4 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/config/AlgebricksConfig.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/config/AlgebricksConfig.java
@@ -20,20 +20,4 @@
     public static final boolean DEBUG = true;
     public static final String ALGEBRICKS_LOGGER_NAME = "edu.uci.ics.hyracks.algebricks";
     public static final Logger ALGEBRICKS_LOGGER = Logger.getLogger(ALGEBRICKS_LOGGER_NAME);
-    public static final String HYRACKS_APP_NAME = "algebricks";
-
-    // public static final Level ALGEBRICKS_LOG_LEVEL = Level.FINEST;
-    //
-    // static {
-    // Handler h;
-    // try {
-    // h = new ConsoleHandler();
-    // h.setFormatter(new SysoutFormatter());
-    // } catch (Exception e) {
-    // h = new ConsoleHandler();
-    // }
-    // h.setLevel(ALGEBRICKS_LOG_LEVEL);
-    // ALGEBRICKS_LOGGER.addHandler(h);
-    // ALGEBRICKS_LOGGER.setLevel(ALGEBRICKS_LOG_LEVEL);
-    // }
 }
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/jobgen/impl/PlanCompiler.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/jobgen/impl/PlanCompiler.java
index 63a6852..b77d65d 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/jobgen/impl/PlanCompiler.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/jobgen/impl/PlanCompiler.java
@@ -27,6 +27,7 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalPlan;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.IOperatorSchema;
+import edu.uci.ics.hyracks.api.job.IJobletEventListenerFactory;
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 
@@ -42,8 +43,11 @@
         return context;
     }
 
-    public JobSpecification compilePlan(ILogicalPlan plan, IOperatorSchema outerPlanSchema) throws AlgebricksException {
+    public JobSpecification compilePlan(ILogicalPlan plan, IOperatorSchema outerPlanSchema, IJobletEventListenerFactory jobEventListenerFactory) throws AlgebricksException {
         JobSpecification spec = new JobSpecification();
+        if (jobEventListenerFactory != null) {
+            spec.setJobletEventListenerFactory(jobEventListenerFactory);
+        }
         List<ILogicalOperator> rootOps = new ArrayList<ILogicalOperator>();
         IHyracksJobBuilder builder = new JobBuilder(spec, context.getClusterLocations());
         for (Mutable<ILogicalOperator> opRef : plan.getRoots()) {
diff --git a/algebricks/algebricks-data/pom.xml b/algebricks/algebricks-data/pom.xml
index 9d42a5c..1b6646f 100644
--- a/algebricks/algebricks-data/pom.xml
+++ b/algebricks/algebricks-data/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,12 +27,12 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-common</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-data-std</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-examples/piglet-example/pom.xml b/algebricks/algebricks-examples/piglet-example/pom.xml
index d4d6c89..7294979 100644
--- a/algebricks/algebricks-examples/piglet-example/pom.xml
+++ b/algebricks/algebricks-examples/piglet-example/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>algebricks-examples</artifactId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -49,12 +49,47 @@
 				</configuration>
 			</plugin>
 		</plugins>
+		<pluginManagement>
+			<plugins>
+				<!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself.-->
+				<plugin>
+					<groupId>org.eclipse.m2e</groupId>
+					<artifactId>lifecycle-mapping</artifactId>
+					<version>1.0.0</version>
+					<configuration>
+						<lifecycleMappingMetadata>
+							<pluginExecutions>
+								<pluginExecution>
+									<pluginExecutionFilter>
+										<groupId>
+											org.codehaus.mojo
+										</groupId>
+										<artifactId>
+											javacc-maven-plugin
+										</artifactId>
+										<versionRange>
+											[2.6,)
+										</versionRange>
+										<goals>
+											<goal>javacc</goal>
+										</goals>
+									</pluginExecutionFilter>
+									<action>
+										<ignore />
+									</action>
+								</pluginExecution>
+							</pluginExecutions>
+						</lifecycleMappingMetadata>
+					</configuration>
+				</plugin>
+			</plugins>
+		</pluginManagement>
 	</build>
 	<dependencies>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>junit</groupId>
diff --git a/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/compiler/PigletCompiler.java b/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/compiler/PigletCompiler.java
index 2981157..6c2700d 100644
--- a/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/compiler/PigletCompiler.java
+++ b/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/compiler/PigletCompiler.java
@@ -163,7 +163,7 @@
             LOGGER.info("Optimized Plan:");
             LOGGER.info(getPrettyPrintedPlan(plan));
         }
-        return compiler.createJob(null);
+        return compiler.createJob(null, null);
     }
 
     private ILogicalPlan translate(List<ASTNode> ast) throws PigletException {
diff --git a/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/metadata/PigletMetadataProvider.java b/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/metadata/PigletMetadataProvider.java
index 15b290e..9caa3e3 100644
--- a/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/metadata/PigletMetadataProvider.java
+++ b/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/metadata/PigletMetadataProvider.java
@@ -62,13 +62,10 @@
 
     @SuppressWarnings("unchecked")
     @Override
-	public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getScannerRuntime(
-			IDataSource<String> dataSource,
-			List<LogicalVariable> scanVariables,
-			List<LogicalVariable> projectVariables, boolean projectPushed,
-			IOperatorSchema opSchema, IVariableTypeEnvironment typeEnv,
-			JobGenContext context, JobSpecification jobSpec)
-			throws AlgebricksException {
+    public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getScannerRuntime(IDataSource<String> dataSource,
+            List<LogicalVariable> scanVariables, List<LogicalVariable> projectVariables, boolean projectPushed,
+            IOperatorSchema opSchema, IVariableTypeEnvironment typeEnv, JobGenContext context,
+            JobSpecification jobSpec, Object implConfig) throws AlgebricksException {
         PigletFileDataSource ds = (PigletFileDataSource) dataSource;
 
         FileSplit[] fileSplits = ds.getFileSplits();
@@ -160,22 +157,6 @@
     }
 
     @Override
-    public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getInsertRuntime(IDataSource<String> dataSource,
-            IOperatorSchema propagatedSchema, List<LogicalVariable> keys, LogicalVariable payLoadVar,
-            RecordDescriptor recordDesc, JobGenContext context, JobSpecification jobSpec) throws AlgebricksException {
-        // TODO Auto-generated method stub
-        return null;
-    }
-
-    @Override
-    public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getDeleteRuntime(IDataSource<String> dataSource,
-            IOperatorSchema propagatedSchema, List<LogicalVariable> keys, LogicalVariable payLoadVar,
-            RecordDescriptor recordDesc, JobGenContext context, JobSpecification jobSpec) throws AlgebricksException {
-        // TODO Auto-generated method stub
-        return null;
-    }
-
-    @Override
     public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getIndexInsertRuntime(
             IDataSourceIndex<String, String> dataSource, IOperatorSchema propagatedSchema,
             IOperatorSchema[] inputSchemas, IVariableTypeEnvironment typeEnv, List<LogicalVariable> primaryKeys,
@@ -194,9 +175,28 @@
         // TODO Auto-generated method stub
         return null;
     }
-    
+
     @Override
     public IFunctionInfo lookupFunction(FunctionIdentifier fid) {
         return FN_MAP.get(fid);
     }
+
+    @Override
+    public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getInsertRuntime(IDataSource<String> dataSource,
+            IOperatorSchema propagatedSchema, IVariableTypeEnvironment typeEnv, List<LogicalVariable> keys,
+            LogicalVariable payLoadVar, RecordDescriptor recordDesc, JobGenContext context, JobSpecification jobSpec)
+            throws AlgebricksException {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    @Override
+    public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getDeleteRuntime(IDataSource<String> dataSource,
+            IOperatorSchema propagatedSchema, IVariableTypeEnvironment typeEnv, List<LogicalVariable> keys,
+            LogicalVariable payLoadVar, RecordDescriptor recordDesc, JobGenContext context, JobSpecification jobSpec)
+            throws AlgebricksException {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
 }
diff --git a/algebricks/algebricks-examples/pom.xml b/algebricks/algebricks-examples/pom.xml
index fc8188d..b19150c 100644
--- a/algebricks/algebricks-examples/pom.xml
+++ b/algebricks/algebricks-examples/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/algebricks/algebricks-rewriter/pom.xml b/algebricks/algebricks-rewriter/pom.xml
index e40f1fe..172d7b8 100644
--- a/algebricks/algebricks-rewriter/pom.xml
+++ b/algebricks/algebricks-rewriter/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,7 +27,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>algebricks-core</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   	</dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/EnforceOrderByAfterSubplan.java b/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/EnforceOrderByAfterSubplan.java
new file mode 100644
index 0000000..3260ca0
--- /dev/null
+++ b/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/EnforceOrderByAfterSubplan.java
@@ -0,0 +1,139 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.algebricks.rewriter.rules;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.commons.lang3.mutable.MutableObject;
+
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.common.utils.Pair;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.IOptimizationContext;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalOperatorTag;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AbstractLogicalExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.OrderOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.OrderOperator.IOrder;
+import edu.uci.ics.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule;
+
+/**
+ * If there is any ordering property before the subplan operator, the ordering should
+ * be kept after the subplan.
+ * This rule adds a redundant order operator after those cases, to guarantee the correctness.
+ * 
+ * @author yingyib
+ */
+public class EnforceOrderByAfterSubplan implements IAlgebraicRewriteRule {
+    /** a set of order-breaking operators */
+    private final Set<LogicalOperatorTag> orderBreakingOps = new HashSet<LogicalOperatorTag>();
+
+    public EnforceOrderByAfterSubplan() {
+        /** add operators that break the ordering */
+        orderBreakingOps.add(LogicalOperatorTag.INNERJOIN);
+        orderBreakingOps.add(LogicalOperatorTag.LEFTOUTERJOIN);
+        orderBreakingOps.add(LogicalOperatorTag.UNIONALL);
+    }
+
+    @Override
+    public boolean rewritePre(Mutable<ILogicalOperator> opRef, IOptimizationContext context) throws AlgebricksException {
+        return false;
+    }
+
+    @Override
+    public boolean rewritePost(Mutable<ILogicalOperator> opRef, IOptimizationContext context)
+            throws AlgebricksException {
+        AbstractLogicalOperator op1 = (AbstractLogicalOperator) opRef.getValue();
+        if (context.checkIfInDontApplySet(this, op1)) {
+            return false;
+        }
+        List<Mutable<ILogicalOperator>> inputs = op1.getInputs();
+        context.addToDontApplySet(this, op1);
+        if (op1.getOperatorTag() == LogicalOperatorTag.ORDER || inputs == null) {
+            /**
+             * does not apply if
+             * 1. there is yet-another order operator on-top-of the subplan, because the downstream order operator's ordering will be broken anyway
+             * 2. the input operator(s) is null
+             */
+            return false;
+        }
+        boolean changed = false;
+        for (int i = 0; i < inputs.size(); i++) {
+            Mutable<ILogicalOperator> inputOpRef = inputs.get(i);
+            AbstractLogicalOperator op = (AbstractLogicalOperator) inputOpRef.getValue();
+            context.addToDontApplySet(this, op);
+            if (op.getOperatorTag() != LogicalOperatorTag.SUBPLAN) {
+                continue;
+            }
+
+            /**
+             * check the order operators whose ordering is not broken before the subplan operator, and then
+             * duplicate them on-top-of the subplan operator
+             */
+            boolean foundTarget = true;
+            AbstractLogicalOperator child = (AbstractLogicalOperator) op.getInputs().get(0).getValue();
+            while (child.getOperatorTag() != LogicalOperatorTag.ORDER) {
+                context.addToDontApplySet(this, child);
+                if (orderBreakingOps.contains(child.getOperatorTag())) {
+                    foundTarget = false;
+                    break;
+                }
+                List<Mutable<ILogicalOperator>> childInputs = child.getInputs();
+                if (childInputs == null || childInputs.size() > 2 || childInputs.size() < 1) {
+                    foundTarget = false;
+                    break;
+                } else {
+                    child = (AbstractLogicalOperator) childInputs.get(0).getValue();
+                }
+            }
+            /** the target order-by operator has not been found. */
+            if (!foundTarget) {
+                return false;
+            }
+
+            /** duplicate the order-by operator and insert on-top-of the subplan operator */
+            context.addToDontApplySet(this, child);
+            OrderOperator sourceOrderOp = (OrderOperator) child;
+            List<Pair<IOrder, Mutable<ILogicalExpression>>> orderExprs = deepCopyOrderAndExpression(sourceOrderOp
+                    .getOrderExpressions());
+            OrderOperator newOrderOp = new OrderOperator(orderExprs);
+            context.addToDontApplySet(this, newOrderOp);
+            inputs.set(i, new MutableObject<ILogicalOperator>(newOrderOp));
+            newOrderOp.getInputs().add(inputOpRef);
+            context.computeAndSetTypeEnvironmentForOperator(newOrderOp);
+            changed = true;
+        }
+        return changed;
+    }
+
+    private Mutable<ILogicalExpression> deepCopyExpressionRef(Mutable<ILogicalExpression> oldExpr) {
+        return new MutableObject<ILogicalExpression>(((AbstractLogicalExpression) oldExpr.getValue()).cloneExpression());
+    }
+
+    private List<Pair<IOrder, Mutable<ILogicalExpression>>> deepCopyOrderAndExpression(
+            List<Pair<IOrder, Mutable<ILogicalExpression>>> ordersAndExprs) {
+        List<Pair<IOrder, Mutable<ILogicalExpression>>> newOrdersAndExprs = new ArrayList<Pair<IOrder, Mutable<ILogicalExpression>>>();
+        for (Pair<IOrder, Mutable<ILogicalExpression>> pair : ordersAndExprs)
+            newOrdersAndExprs.add(new Pair<IOrder, Mutable<ILogicalExpression>>(pair.first,
+                    deepCopyExpressionRef(pair.second)));
+        return newOrdersAndExprs;
+    }
+}
diff --git a/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/ExtractCommonOperatorsRule.java b/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/ExtractCommonOperatorsRule.java
index 7e27b79..0d20f28 100644
--- a/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/ExtractCommonOperatorsRule.java
+++ b/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/ExtractCommonOperatorsRule.java
@@ -54,7 +54,8 @@
     @Override
     public boolean rewritePre(Mutable<ILogicalOperator> opRef, IOptimizationContext context) throws AlgebricksException {
         AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue();
-        if (op.getOperatorTag() != LogicalOperatorTag.WRITE && op.getOperatorTag() != LogicalOperatorTag.WRITE_RESULT) {
+        if (op.getOperatorTag() != LogicalOperatorTag.WRITE && op.getOperatorTag() != LogicalOperatorTag.WRITE_RESULT
+                && op.getOperatorTag() != LogicalOperatorTag.DISTRIBUTE_RESULT) {
             return false;
         }
         if (!roots.contains(op))
@@ -66,7 +67,8 @@
     public boolean rewritePost(Mutable<ILogicalOperator> opRef, IOptimizationContext context)
             throws AlgebricksException {
         AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue();
-        if (op.getOperatorTag() != LogicalOperatorTag.WRITE && op.getOperatorTag() != LogicalOperatorTag.WRITE_RESULT) {
+        if (op.getOperatorTag() != LogicalOperatorTag.WRITE && op.getOperatorTag() != LogicalOperatorTag.WRITE_RESULT
+                && op.getOperatorTag() != LogicalOperatorTag.DISTRIBUTE_RESULT) {
             return false;
         }
         boolean rewritten = false;
diff --git a/algebricks/algebricks-runtime/pom.xml b/algebricks/algebricks-runtime/pom.xml
index 3ddde0f..bdb8c0f 100644
--- a/algebricks/algebricks-runtime/pom.xml
+++ b/algebricks/algebricks-runtime/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,27 +27,27 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-storage-am-btree</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-storage-am-rtree</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-dataflow-std</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-common</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-data</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/std/StreamDieRuntimeFactory.java b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/std/StreamDieRuntimeFactory.java
index 796ef0a..508ce5d 100644
--- a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/std/StreamDieRuntimeFactory.java
+++ b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/std/StreamDieRuntimeFactory.java
@@ -72,6 +72,8 @@
                         }
                     } else {
                         throw new HyracksDataException("injected failure");
+//                    	System.out.println("Injected Kill-JVM");
+//                    	System.exit(-1);
                     }
                 }
             }
diff --git a/algebricks/algebricks-tests/pom.xml b/algebricks/algebricks-tests/pom.xml
index 0a139fa..02b7c45 100644
--- a/algebricks/algebricks-tests/pom.xml
+++ b/algebricks/algebricks-tests/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -85,7 +85,7 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-compiler</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>junit</groupId>
@@ -96,17 +96,17 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-control-cc</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-control-nc</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-data-std</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-tests/src/test/java/edu/uci/ics/hyracks/algebricks/tests/util/AlgebricksHyracksIntegrationUtil.java b/algebricks/algebricks-tests/src/test/java/edu/uci/ics/hyracks/algebricks/tests/util/AlgebricksHyracksIntegrationUtil.java
index dad7cd0..2855eb2 100644
--- a/algebricks/algebricks-tests/src/test/java/edu/uci/ics/hyracks/algebricks/tests/util/AlgebricksHyracksIntegrationUtil.java
+++ b/algebricks/algebricks-tests/src/test/java/edu/uci/ics/hyracks/algebricks/tests/util/AlgebricksHyracksIntegrationUtil.java
@@ -71,7 +71,6 @@
         nc2.start();
 
         hcc = new HyracksConnection(ccConfig.clientNetIpAddress, ccConfig.clientNetPort);
-        hcc.createApplication(AlgebricksConfig.HYRACKS_APP_NAME, null);
     }
 
     public static void deinit() throws Exception {
@@ -82,7 +81,7 @@
 
     public static void runJob(JobSpecification spec) throws Exception {
         AlgebricksConfig.ALGEBRICKS_LOGGER.info(spec.toJSON().toString());
-        JobId jobId = hcc.startJob(AlgebricksConfig.HYRACKS_APP_NAME, spec, EnumSet.of(JobFlag.PROFILE_RUNTIME));
+        JobId jobId = hcc.startJob(spec, EnumSet.of(JobFlag.PROFILE_RUNTIME));
         AlgebricksConfig.ALGEBRICKS_LOGGER.info(jobId.toString());
         hcc.waitForCompletion(jobId);
     }
diff --git a/algebricks/pom.xml b/algebricks/pom.xml
index aa8446a..d7c871a 100644
--- a/algebricks/pom.xml
+++ b/algebricks/pom.xml
@@ -2,7 +2,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>algebricks</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
+  <version>0.2.5-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>algebricks</name>
 
diff --git a/genomix/genomix-data/.classpath b/genomix/genomix-data/.classpath
index e43402f..6e26406 100644
--- a/genomix/genomix-data/.classpath
+++ b/genomix/genomix-data/.classpath
@@ -1,36 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="src" output="target/classes" path="src/main/java">
-		<attributes>
-			<attribute name="optional" value="true"/>
-			<attribute name="maven.pomderived" value="true"/>
-		</attributes>
-	</classpathentry>
-	<classpathentry excluding="**" kind="src" output="target/classes" path="src/main/resources">
-		<attributes>
-			<attribute name="maven.pomderived" value="true"/>
-		</attributes>
-	</classpathentry>
-	<classpathentry kind="src" output="target/test-classes" path="src/test/java">
-		<attributes>
-			<attribute name="optional" value="true"/>
-			<attribute name="maven.pomderived" value="true"/>
-		</attributes>
-	</classpathentry>
-	<classpathentry excluding="**" kind="src" output="target/test-classes" path="src/test/resources">
-		<attributes>
-			<attribute name="maven.pomderived" value="true"/>
-		</attributes>
-	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7">
-		<attributes>
-			<attribute name="maven.pomderived" value="true"/>
-		</attributes>
-	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
-		<attributes>
-			<attribute name="maven.pomderived" value="true"/>
-		</attributes>
-	</classpathentry>
+	<classpathentry kind="src" output="target/classes" path="src/main/java"/>
+	<classpathentry excluding="**" kind="src" output="target/classes" path="src/main/resources"/>
+	<classpathentry kind="src" output="target/test-classes" path="src/test/java"/>
+	<classpathentry excluding="**" kind="src" output="target/test-classes" path="src/test/resources"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>
+	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER"/>
 	<classpathentry kind="output" path="target/classes"/>
 </classpath>
diff --git a/genomix/genomix-data/pom.xml b/genomix/genomix-data/pom.xml
index 5ce538f..4faf4a3 100644
--- a/genomix/genomix-data/pom.xml
+++ b/genomix/genomix-data/pom.xml
@@ -8,7 +8,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>genomix</artifactId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 	<properties>
diff --git a/genomix/genomix-data/src/main/assembly/binary-assembly.xml b/genomix/genomix-data/src/main/assembly/binary-assembly.xml
index 0500499..68d424a 100644
--- a/genomix/genomix-data/src/main/assembly/binary-assembly.xml
+++ b/genomix/genomix-data/src/main/assembly/binary-assembly.xml
@@ -1,19 +1,19 @@
 <assembly>
-  <id>binary-assembly</id>
-  <formats>
-    <format>zip</format>
-    <format>dir</format>
-  </formats>
-  <includeBaseDirectory>false</includeBaseDirectory>
-  <fileSets>
-    <fileSet>
-      <directory>target/appassembler/bin</directory>
-      <outputDirectory>bin</outputDirectory>
-      <fileMode>0755</fileMode>
-    </fileSet>
-    <fileSet>
-      <directory>target/appassembler/lib</directory>
-      <outputDirectory>lib</outputDirectory>
-    </fileSet>
-  </fileSets>
+	<id>binary-assembly</id>
+	<formats>
+		<format>zip</format>
+		<format>dir</format>
+	</formats>
+	<includeBaseDirectory>false</includeBaseDirectory>
+	<fileSets>
+		<fileSet>
+			<directory>target/appassembler/bin</directory>
+			<outputDirectory>bin</outputDirectory>
+			<fileMode>0755</fileMode>
+		</fileSet>
+		<fileSet>
+			<directory>target/appassembler/lib</directory>
+			<outputDirectory>lib</outputDirectory>
+		</fileSet>
+	</fileSets>
 </assembly>
diff --git a/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/GeneCode.java b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/GeneCode.java
new file mode 100644
index 0000000..1ed6f80
--- /dev/null
+++ b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/GeneCode.java
@@ -0,0 +1,126 @@
+package edu.uci.ics.genomix.type;
+
+public class GeneCode {
+    public final static byte[] GENE_SYMBOL = { 'A', 'C', 'G', 'T' };
+    /**
+     * make sure this 4 ids equal to the sequence id of char in {@GENE_SYMBOL
+	 * }
+     */
+    public static final byte A = 0;
+    public static final byte C = 1;
+    public static final byte G = 2;
+    public static final byte T = 3;
+
+    public static byte getCodeFromSymbol(byte ch) {
+        byte r = 0;
+        switch (ch) {
+            case 'A':
+            case 'a':
+                r = A;
+                break;
+            case 'C':
+            case 'c':
+                r = C;
+                break;
+            case 'G':
+            case 'g':
+                r = G;
+                break;
+            case 'T':
+            case 't':
+                r = T;
+                break;
+        }
+        return r;
+    }
+
+    public static byte getSymbolFromCode(byte code) {
+        if (code > 3) {
+            return '!';
+        }
+        return GENE_SYMBOL[code];
+    }
+
+    public static byte getAdjBit(byte t) {
+        byte r = 0;
+        switch (t) {
+            case 'A':
+            case 'a':
+                r = 1 << A;
+                break;
+            case 'C':
+            case 'c':
+                r = 1 << C;
+                break;
+            case 'G':
+            case 'g':
+                r = 1 << G;
+                break;
+            case 'T':
+            case 't':
+                r = 1 << T;
+                break;
+        }
+        return r;
+    }
+
+    /**
+     * It works for path merge. Merge the kmer by his next, we need to make sure
+     * the @{t} is a single neighbor.
+     * 
+     * @param t
+     *            the neighbor code in BitMap
+     * @return the genecode
+     */
+    public static byte getGeneCodeFromBitMap(byte t) {
+        switch (t) {
+            case 1 << A:
+                return A;
+            case 1 << C:
+                return C;
+            case 1 << G:
+                return G;
+            case 1 << T:
+                return T;
+        }
+        return -1;
+    }
+
+    public static int countNumberOfBitSet(int i) {
+        int c = 0;
+        for (; i != 0; c++) {
+            i &= i - 1;
+        }
+        return c;
+    }
+
+    public static int inDegree(byte bitmap) {
+        return countNumberOfBitSet((bitmap >> 4) & 0x0f);
+    }
+
+    public static int outDegree(byte bitmap) {
+        return countNumberOfBitSet(bitmap & 0x0f);
+    }
+
+    public static byte mergePreNextAdj(byte pre, byte next) {
+        return (byte) (pre << 4 | (next & 0x0f));
+    }
+
+    public static String getSymbolFromBitMap(byte code) {
+        int left = (code >> 4) & 0x0F;
+        int right = code & 0x0F;
+        StringBuilder str = new StringBuilder();
+        for (int i = A; i <= T; i++) {
+            if ((left & (1 << i)) != 0) {
+                str.append((char) GENE_SYMBOL[i]);
+            }
+        }
+        str.append('|');
+        for (int i = A; i <= T; i++) {
+            if ((right & (1 << i)) != 0) {
+                str.append((char) GENE_SYMBOL[i]);
+            }
+        }
+        return str.toString();
+    }
+}
diff --git a/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/Kmer.java b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/Kmer.java
deleted file mode 100644
index 21fee2b..0000000
--- a/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/Kmer.java
+++ /dev/null
@@ -1,298 +0,0 @@
-/*
- * Copyright 2009-2012 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.genomix.type;
-
-public class Kmer {
- 
-	public final static byte[] GENE_SYMBOL = { 'A', 'C', 'G', 'T' };
-
-	public final static class GENE_CODE {
-
-		/**
-		 * make sure this 4 ids equal to the sequence id of char in
-		 * {@GENE_SYMBOL}
-		 */
-		public static final byte A = 0;
-		public static final byte C = 1;
-		public static final byte G = 2;
-		public static final byte T = 3;
-
-		public static byte getCodeFromSymbol(byte ch) {
-			byte r = 0;
-			switch (ch) {
-			case 'A':
-			case 'a':
-				r = A;
-				break;
-			case 'C':
-			case 'c':
-				r = C;
-				break;
-			case 'G':
-			case 'g':
-				r = G;
-				break;
-			case 'T':
-			case 't':
-				r = T;
-				break;
-			}
-			return r;
-		}
-
-		public static byte getSymbolFromCode(byte code) {
-			if (code > 3) {
-				return '!';
-			}
-			return GENE_SYMBOL[code];
-		}
-
-		public static byte getAdjBit(byte t) {
-			byte r = 0;
-			switch (t) {
-			case 'A':
-			case 'a':
-				r = 1 << A;
-				break;
-			case 'C':
-			case 'c':
-				r = 1 << C;
-				break;
-			case 'G':
-			case 'g':
-				r = 1 << G;
-				break;
-			case 'T':
-			case 't':
-				r = 1 << T;
-				break;
-			}
-			return r;
-		}
-
-		/** 
-		 * It works for path merge. 
-		 * Merge the kmer by his next, we need to make sure the @{t} is a single neighbor.
-		 * @param t the neighbor code in BitMap
-		 * @return the genecode 
-		 */
-		public static byte getGeneCodeFromBitMap(byte t) {
-			switch (t) {
-			case 1 << A:
-				return A;
-			case 1 << C:
-				return C;
-			case 1 << G:
-				return G;
-			case 1 << T:
-				return T;
-			}
-			return -1;
-		}
-
-		public static byte mergePreNextAdj(byte pre, byte next) {
-			return (byte) (pre << 4 | (next & 0x0f));
-		}
-
-		public static String getSymbolFromBitMap(byte code) {
-			int left = (code >> 4) & 0x0F;
-			int right = code & 0x0F;
-			StringBuilder str = new StringBuilder();
-			for (int i = A; i <= T; i++) {
-				if ((left & (1 << i)) != 0) {
-					str.append((char) GENE_SYMBOL[i]);
-				}
-			}
-			str.append('|');
-			for (int i = A; i <= T; i++) {
-				if ((right & (1 << i)) != 0) {
-					str.append((char) GENE_SYMBOL[i]);
-				}
-			}
-			return str.toString();
-		}
-	}
-
-	public static String recoverKmerFrom(int k, byte[] keyData, int keyStart,
-			int keyLength) {
-		StringBuilder strKmer = new StringBuilder();
-		int byteId = keyStart + keyLength - 1;
-		byte currentbyte = keyData[byteId];
-		for (int geneCount = 0; geneCount < k; geneCount++) {
-			if (geneCount % 4 == 0 && geneCount > 0) {
-				currentbyte = keyData[--byteId];
-			}
-			strKmer.append((char) GENE_SYMBOL[(currentbyte >> ((geneCount % 4) * 2)) & 0x03]);
-		}
-		return strKmer.toString();
-	}
-
-	public static int getByteNumFromK(int k) {
-		int x = k / 4;
-		if (k % 4 != 0) {
-			x += 1;
-		}
-		return x;
-	}
-
-	/**
-	 * Compress Kmer into bytes array AATAG will compress as [0x000G, 0xATAA]
-	 * 
-	 * @param kmer
-	 * @param input
-	 *            array
-	 * @param start
-	 *            position
-	 * @return initialed kmer array
-	 */
-	public static byte[] compressKmer(int k, byte[] array, int start) {
-		final int byteNum = getByteNumFromK(k);
-		byte[] bytes = new byte[byteNum];
-
-		byte l = 0;
-		int bytecount = 0;
-		int bcount = byteNum - 1;
-		for (int i = start; i < start + k; i++) {
-			byte code = GENE_CODE.getCodeFromSymbol(array[i]);
-			l |= (byte) (code << bytecount);
-			bytecount += 2;
-			if (bytecount == 8) {
-				bytes[bcount--] = l;
-				l = 0;
-				bytecount = 0;
-			}
-		}
-		if (bcount >= 0) {
-			bytes[0] = l;
-		}
-		return bytes;
-	}
-
-	/**
-	 * Shift Kmer to accept new input
-	 * 
-	 * @param kmer
-	 * @param bytes
-	 *            Kmer Array
-	 * @param c
-	 *            Input new gene character
-	 * @return the shiftout gene, in gene code format
-	 */
-	public static byte moveKmer(int k, byte[] kmer, byte c) {
-		int byteNum = kmer.length;
-		byte output = (byte) (kmer[byteNum - 1] & 0x03);
-		for (int i = byteNum - 1; i > 0; i--) {
-			byte in = (byte) (kmer[i - 1] & 0x03);
-			kmer[i] = (byte) (((kmer[i] >>> 2) & 0x3f) | (in << 6));
-		}
-		int pos = ((k - 1) % 4) << 1;
-		byte code = (byte) (GENE_CODE.getCodeFromSymbol(c) << pos);
-		kmer[0] = (byte) (((kmer[0] >>> 2) & 0x3f) | code);
-		return (byte) (1 << output);
-	}
-
-	public static byte reverseKmerByte(byte k) {
-		int x = (((k >> 2) & 0x33) | ((k << 2) & 0xcc));
-		return (byte) (((x >> 4) & 0x0f) | ((x << 4) & 0xf0));
-	}
-
-	public static byte[] reverseKmer(int k, byte[] kmer) {
-		byte[] reverseKmer = new byte[kmer.length];
-
-		int curPosAtKmer = ((k - 1) % 4) << 1;
-		int curByteAtKmer = 0;
-
-		int curPosAtReverse = 0;
-		int curByteAtReverse = reverseKmer.length - 1;
-		reverseKmer[curByteAtReverse] = 0;
-		for (int i = 0; i < k; i++) {
-			byte gene = (byte) ((kmer[curByteAtKmer] >> curPosAtKmer) & 0x03);
-			reverseKmer[curByteAtReverse] |= gene << curPosAtReverse;
-			curPosAtReverse += 2;
-			if (curPosAtReverse >= 8) {
-				curPosAtReverse = 0;
-				reverseKmer[--curByteAtReverse] = 0;
-			}
-			curPosAtKmer -= 2;
-			if (curPosAtKmer < 0) {
-				curPosAtKmer = 6;
-				curByteAtKmer++;
-			}
-		}
-
-		return reverseKmer;
-	}
-
-	/**
-	 * Compress Reversed Kmer into bytes array AATAG will compress as
-	 * [0x000A,0xATAG]
-	 * 
-	 * @param kmer
-	 * @param input
-	 *            array
-	 * @param start
-	 *            position
-	 * @return initialed kmer array
-	 */
-	public static byte[] compressKmerReverse(int k, byte[] array, int start) {
-		final int byteNum = getByteNumFromK(k);
-		byte[] bytes = new byte[byteNum];
-
-		byte l = 0;
-		int bytecount = 0;
-		int bcount = byteNum - 1;
-		for (int i = start + k - 1; i >= 0; i--) {
-			byte code = GENE_CODE.getCodeFromSymbol(array[i]);
-			l |= (byte) (code << bytecount);
-			bytecount += 2;
-			if (bytecount == 8) {
-				bytes[bcount--] = l;
-				l = 0;
-				bytecount = 0;
-			}
-		}
-		if (bcount >= 0) {
-			bytes[0] = l;
-		}
-		return bytes;
-	}
-
-	/**
-	 * Shift Kmer to accept new input
-	 * 
-	 * @param kmer
-	 * @param bytes
-	 *            Kmer Array
-	 * @param c
-	 *            Input new gene character
-	 * @return the shiftout gene, in gene code format
-	 */
-	public static byte moveKmerReverse(int k, byte[] kmer, byte c) {
-		int pos = ((k - 1) % 4) << 1;
-		byte output = (byte) ((kmer[0] >> pos) & 0x03);
-		for (int i = 0; i < kmer.length - 1; i++) {
-			byte in = (byte) ((kmer[i + 1] >> 6) & 0x03);
-			kmer[i] = (byte) ((kmer[i] << 2) | in);
-		}
-		// (k%4) * 2
-		if (k % 4 != 0) {
-			kmer[0] &= (1 << ((k % 4) << 1)) - 1;
-		}
-		kmer[kmer.length - 1] = (byte) ((kmer[kmer.length - 1] << 2) | GENE_CODE
-				.getCodeFromSymbol(c));
-		return (byte) (1 << output);
-	}
-
-}
diff --git a/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/KmerBytesWritable.java b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/KmerBytesWritable.java
index 1d41167..5d1cc11 100644
--- a/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/KmerBytesWritable.java
+++ b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/KmerBytesWritable.java
@@ -14,138 +14,267 @@
  */
 package edu.uci.ics.genomix.type;
 
-import java.io.IOException;
 import java.io.DataInput;
 import java.io.DataOutput;
+import java.io.IOException;
+import java.io.Serializable;
+
 import org.apache.hadoop.io.BinaryComparable;
 import org.apache.hadoop.io.WritableComparable;
 import org.apache.hadoop.io.WritableComparator;
 
-public class KmerBytesWritable extends BinaryComparable implements
-		WritableComparable<BinaryComparable> {
-	private static final int LENGTH_BYTES = 4;
-	private static final byte[] EMPTY_BYTES = {};
-	private byte size;
-	private byte[] bytes;
+/**
+ * Fix kmer length byteswritable
+ * It was used to generate the graph in which phase the kmer length doesn't change.
+ * Thus the size of bytes doesn't change either.
+ */
+public class KmerBytesWritable extends BinaryComparable implements Serializable, WritableComparable<BinaryComparable> {
+    /**
+	 * 
+	 */
+    private static final long serialVersionUID = 1L;
+    private static final byte[] EMPTY_BYTES = {};
 
-	public KmerBytesWritable() {
-		this(EMPTY_BYTES);
-	}
+    protected int size;
+    protected byte[] bytes;
+    protected int kmerlength;
 
-	public KmerBytesWritable(byte[] bytes) {
-		this.bytes = bytes;
-		this.size = (byte) bytes.length;
-	}
+    @Deprecated
+    public KmerBytesWritable() {
+        this(0, EMPTY_BYTES);
+    }
 
-	@Override
-	public byte[] getBytes() {
-		return bytes;
-	}
+    public KmerBytesWritable(int k, byte[] storage) {
+        this.kmerlength = k;
+        if (k > 0){
+            this.size = KmerUtil.getByteNumFromK(kmerlength);
+            this.bytes = storage;
+            if (this.bytes.length < size){
+                throw new ArrayIndexOutOfBoundsException("Storage is smaller than required space for kmerlength:k");
+            }
+        }else{
+            this.bytes = storage;
+            this.size = 0;
+        }
+    }
 
-	@Deprecated
-	public byte[] get() {
-		return getBytes();
-	}
+    /**
+     * Initial Kmer space by kmerlength
+     * 
+     * @param k
+     *            kmerlength
+     */
+    public KmerBytesWritable(int k) {
+        this.kmerlength = k;
+        this.size = KmerUtil.getByteNumFromK(kmerlength);
+        this.bytes = new byte[this.size];
+    }
 
-	@Override
-	public int getLength() {
-		return (int) size;
-	}
+    public KmerBytesWritable(KmerBytesWritable right) {
+        this.kmerlength = right.kmerlength;
+        this.size = right.size;
+        this.bytes = new byte[right.size];
+        set(right);
+    }
 
-	@Deprecated
-	public int getSize() {
-		return getLength();
-	}
+    public byte getGeneCodeAtPosition(int pos) {
+        if (pos >= kmerlength) {
+            return -1;
+        }
+        int posByte = pos / 4;
+        int shift = (pos % 4) << 1;
+        return (byte) ((bytes[size - 1 - posByte] >> shift) & 0x3);
+    }
 
-	public void setSize(byte size) {
-		if ((int) size > getCapacity()) {
-			setCapacity((byte) (size * 3 / 2));
-		}
-		this.size = size;
-	}
+    public int getKmerLength() {
+        return this.kmerlength;
+    }
 
-	public int getCapacity() {
-		return bytes.length;
-	}
+    @Override
+    public byte[] getBytes() {
+        return bytes;
+    }
 
-	public void setCapacity(byte new_cap) {
-		if (new_cap != getCapacity()) {
-			byte[] new_data = new byte[new_cap];
-			if (new_cap < size) {
-				size = new_cap;
-			}
-			if (size != 0) {
-				System.arraycopy(bytes, 0, new_data, 0, size);
-			}
-			bytes = new_data;
-		}
-	}
+    @Override
+    public int getLength() {
+        return size;
+    }
 
-	public void set(KmerBytesWritable newData) {
-		set(newData.bytes, (byte) 0, newData.size);
-	}
+    /**
+     * Read Kmer from read text into bytes array e.g. AATAG will compress as
+     * [0x000G, 0xATAA]
+     * 
+     * @param k
+     * @param array
+     * @param start
+     */
+    public void setByRead(byte[] array, int start) {
+        byte l = 0;
+        int bytecount = 0;
+        int bcount = this.size - 1;
+        for (int i = start; i < start + kmerlength; i++) {
+            byte code = GeneCode.getCodeFromSymbol(array[i]);
+            l |= (byte) (code << bytecount);
+            bytecount += 2;
+            if (bytecount == 8) {
+                bytes[bcount--] = l;
+                l = 0;
+                bytecount = 0;
+            }
+        }
+        if (bcount >= 0) {
+            bytes[0] = l;
+        }
+    }
 
-	public void set(byte[] newData, byte offset, byte length) {
-		setSize((byte) 0);
-		setSize(length);
-		System.arraycopy(newData, offset, bytes, 0, size);
-	}
+    /**
+     * Compress Reversed Kmer into bytes array AATAG will compress as
+     * [0x000A,0xATAG]
+     * 
+     * @param input
+     *            array
+     * @param start
+     *            position
+     */
+    public void setByReadReverse(byte[] array, int start) {
+        byte l = 0;
+        int bytecount = 0;
+        int bcount = size - 1;
+        for (int i = start + kmerlength - 1; i >= 0; i--) {
+            byte code = GeneCode.getCodeFromSymbol(array[i]);
+            l |= (byte) (code << bytecount);
+            bytecount += 2;
+            if (bytecount == 8) {
+                bytes[bcount--] = l;
+                l = 0;
+                bytecount = 0;
+            }
+        }
+        if (bcount >= 0) {
+            bytes[0] = l;
+        }
+    }
 
-	public void readFields(DataInput in) throws IOException {
-		setSize((byte) 0); // clear the old data
-		setSize(in.readByte());
-		in.readFully(bytes, 0, size);
-	}
+    /**
+     * Shift Kmer to accept new char input
+     * 
+     * @param c
+     *            Input new gene character
+     * @return the shift out gene, in gene code format
+     */
+    public byte shiftKmerWithNextChar(byte c) {
+        return shiftKmerWithNextCode(GeneCode.getCodeFromSymbol(c));
+    }
 
-	@Override
-	public void write(DataOutput out) throws IOException {
-		out.writeByte(size);
-		out.write(bytes, 0, size);
-	}
+    /**
+     * Shift Kmer to accept new gene code
+     * 
+     * @param c
+     *            Input new gene code
+     * @return the shift out gene, in gene code format
+     */
+    public byte shiftKmerWithNextCode(byte c) {
+        byte output = (byte) (bytes[size - 1] & 0x03);
+        for (int i = size - 1; i > 0; i--) {
+            byte in = (byte) (bytes[i - 1] & 0x03);
+            bytes[i] = (byte) (((bytes[i] >>> 2) & 0x3f) | (in << 6));
+        }
+        int pos = ((kmerlength - 1) % 4) << 1;
+        byte code = (byte) (c << pos);
+        bytes[0] = (byte) (((bytes[0] >>> 2) & 0x3f) | code);
+        return (byte) (1 << output);
+    }
 
-	@Override
-	public int hashCode() {
-		return super.hashCode();
-	}
+    /**
+     * Shift Kmer to accept new input char
+     * 
+     * @param c
+     *            Input new gene character
+     * @return the shiftout gene, in gene code format
+     */
+    public byte shiftKmerWithPreChar(byte c) {
+        return shiftKmerWithPreCode(GeneCode.getCodeFromSymbol(c));
+    }
 
-	@Override
-	public boolean equals(Object right_obj) {
-		if (right_obj instanceof KmerBytesWritable)
-			return super.equals(right_obj);
-		return false;
-	}
+    /**
+     * Shift Kmer to accept new gene code
+     * 
+     * @param c
+     *            Input new gene code
+     * @return the shiftout gene, in gene code format
+     */
+    public byte shiftKmerWithPreCode(byte c) {
+        int pos = ((kmerlength - 1) % 4) << 1;
+        byte output = (byte) ((bytes[0] >> pos) & 0x03);
+        for (int i = 0; i < size - 1; i++) {
+            byte in = (byte) ((bytes[i + 1] >> 6) & 0x03);
+            bytes[i] = (byte) ((bytes[i] << 2) | in);
+        }
+        // (k%4) * 2
+        if (kmerlength % 4 != 0) {
+            bytes[0] &= (1 << ((kmerlength % 4) << 1)) - 1;
+        }
+        bytes[size - 1] = (byte) ((bytes[size - 1] << 2) | c);
+        return (byte) (1 << output);
+    }
 
-	@Override
-	public String toString() {
-		StringBuffer sb = new StringBuffer(3 * size);
-		for (int idx = 0; idx < (int) size; idx++) {
-			// if not the first, put a blank separator in
-			if (idx != 0) {
-				sb.append(' ');
-			}
-			String num = Integer.toHexString(0xff & bytes[idx]);
-			// if it is only one digit, add a leading 0.
-			if (num.length() < 2) {
-				sb.append('0');
-			}
-			sb.append(num);
-		}
-		return sb.toString();
-	}
+    public void set(KmerBytesWritable newData) {
+        set(newData.bytes, 0, newData.size);
+    }
 
-	public static class Comparator extends WritableComparator {
-		public Comparator() {
-			super(KmerBytesWritable.class);
-		}
+    public void set(byte[] newData, int offset, int length) {
+        System.arraycopy(newData, offset, bytes, 0, size);
+    }
 
-		public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
-			return compareBytes(b1, s1 + LENGTH_BYTES, l1 - LENGTH_BYTES, b2,
-					s2 + LENGTH_BYTES, l2 - LENGTH_BYTES);
-		}
-	}
+    /**
+     * Don't read the kmerlength from datastream,
+     * Read it from configuration
+     */
+    @Override
+    public void readFields(DataInput in) throws IOException {
+        this.kmerlength = in.readInt();
+        this.size = KmerUtil.getByteNumFromK(kmerlength);
+        if (this.bytes.length < this.size) {
+            this.bytes = new byte[this.size];
+        }
+        in.readFully(bytes, 0, size);
+    }
 
-	static { // register this comparator
-		WritableComparator.define(KmerBytesWritable.class, new Comparator());
-	}
+    @Override
+    public void write(DataOutput out) throws IOException {
+        out.writeInt(kmerlength);
+        out.write(bytes, 0, size);
+    }
+
+    @Override
+    public int hashCode() {
+        return super.hashCode() * this.kmerlength;
+    }
+
+    @Override
+    public boolean equals(Object right_obj) {
+        if (right_obj instanceof KmerBytesWritable)
+            return this.kmerlength == ((KmerBytesWritable) right_obj).kmerlength && super.equals(right_obj);
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return KmerUtil.recoverKmerFrom(this.kmerlength, this.getBytes(), 0, this.getLength());
+    }
+
+    public static class Comparator extends WritableComparator {
+        public Comparator() {
+            super(KmerBytesWritable.class);
+        }
+
+        public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
+            return compareBytes(b1, s1, l1, b2, s2, l2);
+        }
+    }
+
+    static { // register this comparator
+        WritableComparator.define(KmerBytesWritable.class, new Comparator());
+    }
 
 }
diff --git a/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/KmerCountValue.java b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/KmerCountValue.java
index 87eaa87..fab7001 100644
--- a/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/KmerCountValue.java
+++ b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/KmerCountValue.java
@@ -21,50 +21,49 @@
 import org.apache.hadoop.io.Writable;
 
 public class KmerCountValue implements Writable {
-	private byte adjBitMap;
-	private byte count;
+    private byte adjBitMap;
+    private byte count;
 
-	public KmerCountValue(byte bitmap, byte count) {
-		set(bitmap, count);
-	}
+    public KmerCountValue(byte bitmap, byte count) {
+        set(bitmap, count);
+    }
 
-	public KmerCountValue() {
-		adjBitMap = 0;
-		count = 0;
-	}
+    public KmerCountValue() {
+        adjBitMap = 0;
+        count = 0;
+    }
 
-	@Override
-	public void readFields(DataInput arg0) throws IOException {
-		adjBitMap = arg0.readByte();
-		count = arg0.readByte();
-	}
+    @Override
+    public void readFields(DataInput arg0) throws IOException {
+        adjBitMap = arg0.readByte();
+        count = arg0.readByte();
+    }
 
-	@Override
-	public void write(DataOutput arg0) throws IOException {
-		arg0.writeByte(adjBitMap);
-		arg0.writeByte(count);
-	}
+    @Override
+    public void write(DataOutput arg0) throws IOException {
+        arg0.writeByte(adjBitMap);
+        arg0.writeByte(count);
+    }
 
-	@Override
-	public String toString() {
-		return Kmer.GENE_CODE.getSymbolFromBitMap(adjBitMap) + '\t'
-				+ String.valueOf(count);
-	}
+    @Override
+    public String toString() {
+        return GeneCode.getSymbolFromBitMap(adjBitMap) + '\t' + String.valueOf(count);
+    }
 
-	public void set(byte bitmap, byte count) {
-		this.adjBitMap = bitmap;
-		this.count = count;
-	}
+    public void set(byte bitmap, byte count) {
+        this.adjBitMap = bitmap;
+        this.count = count;
+    }
 
-	public byte getAdjBitMap() {
-		return adjBitMap;
-	}
+    public byte getAdjBitMap() {
+        return adjBitMap;
+    }
 
-	public void setAdjBitMap(byte adjBitMap) {
-		this.adjBitMap = adjBitMap;
-	}
+    public void setAdjBitMap(byte adjBitMap) {
+        this.adjBitMap = adjBitMap;
+    }
 
-	public byte getCount() {
-		return count;
-	}
+    public byte getCount() {
+        return count;
+    }
 }
\ No newline at end of file
diff --git a/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/KmerUtil.java b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/KmerUtil.java
index 1c8c46e..9dc1dde 100644
--- a/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/KmerUtil.java
+++ b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/KmerUtil.java
@@ -1,222 +1,31 @@
 package edu.uci.ics.genomix.type;
 
-import java.util.Arrays;
-
 public class KmerUtil {
 
-	public static int countNumberOfBitSet(int i) {
-		int c = 0;
-		for (; i != 0; c++) {
-			i &= i - 1;
-		}
-		return c;
-	}
+    public static int getByteNumFromK(int k) {
+        int x = k / 4;
+        if (k % 4 != 0) {
+            x += 1;
+        }
+        return x;
+    }
 
-	public static int inDegree(byte bitmap) {
-		return countNumberOfBitSet((bitmap >> 4) & 0x0f);
-	}
+    public static byte reverseKmerByte(byte k) {
+        int x = (((k >> 2) & 0x33) | ((k << 2) & 0xcc));
+        return (byte) (((x >> 4) & 0x0f) | ((x << 4) & 0xf0));
+    }
 
-	public static int outDegree(byte bitmap) {
-		return countNumberOfBitSet(bitmap & 0x0f);
-	}
+    public static String recoverKmerFrom(int k, byte[] keyData, int keyStart, int keyLength) {
+        StringBuilder strKmer = new StringBuilder();
+        int byteId = keyStart + keyLength - 1;
+        byte currentbyte = keyData[byteId];
+        for (int geneCount = 0; geneCount < k; geneCount++) {
+            if (geneCount % 4 == 0 && geneCount > 0) {
+                currentbyte = keyData[--byteId];
+            }
+            strKmer.append((char) GeneCode.GENE_SYMBOL[(currentbyte >> ((geneCount % 4) * 2)) & 0x03]);
+        }
+        return strKmer.toString();
+    }
 
-	/**
-	 * Get last kmer from kmer-chain. 
-	 * e.g. kmerChain is AAGCTA, if k =5, it will
-	 * return AGCTA
-	 * @param k
-	 * @param kInChain
-	 * @param kmerChain
-	 * @return LastKmer bytes array
-	 */
-	public static byte[] getLastKmerFromChain(int k, int kInChain,
-			byte[] kmerChain, int offset, int length) {
-		if (k > kInChain) {
-			return null;
-		}
-		if (k == kInChain) {
-			return kmerChain.clone();
-		}
-		int byteNum = Kmer.getByteNumFromK(k);
-		byte[] kmer = new byte[byteNum];
-
-		/** from end to start */
-		int byteInChain = length - 1 - (kInChain - k) / 4;
-		int posInByteOfChain = ((kInChain - k) % 4) << 1; // *2
-		int byteInKmer = byteNum - 1;
-		for (; byteInKmer >= 0 && byteInChain > 0; byteInKmer--, byteInChain--) {
-			kmer[byteInKmer] = (byte) ((0xff & kmerChain[offset + byteInChain]) >> posInByteOfChain);
-			kmer[byteInKmer] |= ((kmerChain[offset + byteInChain - 1] << (8 - posInByteOfChain)));
-		}
-
-		/** last kmer byte */
-		if (byteInKmer == 0) {
-			kmer[0] = (byte) ((kmerChain[offset] & 0xff) >> posInByteOfChain);
-		}
-		return kmer;
-	}
-
-	/**
-	 * Get first kmer from kmer-chain e.g. kmerChain is AAGCTA, if k=5, it will
-	 * return AAGCT
-	 * 
-	 * @param k
-	 * @param kInChain
-	 * @param kmerChain
-	 * @return FirstKmer bytes array
-	 */
-	public static byte[] getFirstKmerFromChain(int k, int kInChain,
-			byte[] kmerChain, int offset, int length) {
-		if (k > kInChain) {
-			return null;
-		}
-		if (k == kInChain) {
-			return kmerChain.clone();
-		}
-		int byteNum = Kmer.getByteNumFromK(k);
-		byte[] kmer = new byte[byteNum];
-
-		int i = 1;
-		for (; i < kmer.length; i++) {
-			kmer[kmer.length - i] = kmerChain[offset + length - i];
-		}
-		int posInByteOfChain = (k % 4) << 1; // *2
-		if (posInByteOfChain == 0) {
-			kmer[0] = kmerChain[offset + length - i];
-		} else {
-			kmer[0] = (byte) (kmerChain[offset + length - i] & ((1 << posInByteOfChain) - 1));
-		}
-		return kmer;
-	}
-
-	/**
-	 * Merge kmer with next neighbor in gene-code format.
-	 * The k of new kmer will increase by 1
-	 * e.g. AAGCT merge with A => AAGCTA
-	 * @param k :input k of kmer
-	 * @param kmer : input bytes of kmer
-	 * @param nextCode: next neighbor in gene-code format
-	 * @return the merged Kmer, this K of this Kmer is k+1
-	 */
-	public static byte[] mergeKmerWithNextCode(int k, byte[] kmer, int offset, int length, byte nextCode) {
-		int byteNum = length;
-		if (k % 4 == 0) {
-			byteNum++;
-		}
-		byte[] mergedKmer = new byte[byteNum];
-		for (int i = 1; i <= length; i++) {
-			mergedKmer[mergedKmer.length - i] = kmer[offset + length - i];
-		}
-		if (mergedKmer.length > length) {
-			mergedKmer[0] = (byte) (nextCode & 0x3);
-		} else {
-			mergedKmer[0] = (byte) (kmer[offset] | ((nextCode & 0x3) << ((k % 4) << 1)));
-		}
-		return mergedKmer;
-	}
-
-	/**
-	 * Merge kmer with previous neighbor in gene-code format.
-	 * The k of new kmer will increase by 1
-	 * e.g. AAGCT merge with A => AAAGCT
-	 * @param k :input k of kmer
-	 * @param kmer : input bytes of kmer
-	 * @param preCode: next neighbor in gene-code format
-	 * @return the merged Kmer,this K of this Kmer is k+1
-	 */
-	public static byte[] mergeKmerWithPreCode(int k, byte[] kmer, int offset, int length, byte preCode) {
-		int byteNum = length;
-		byte[] mergedKmer = null;
-		int byteInMergedKmer = 0;
-		if (k % 4 == 0) {
-			byteNum++;
-			mergedKmer = new byte[byteNum];
-			mergedKmer[0] = (byte) ((kmer[offset] >> 6) & 0x3);
-			byteInMergedKmer++;
-		} else {
-			mergedKmer = new byte[byteNum];
-		}
-		for (int i = 0; i < length - 1; i++, byteInMergedKmer++) {
-			mergedKmer[byteInMergedKmer] = (byte) ((kmer[offset + i] << 2) | ((kmer[offset + i + 1] >> 6) & 0x3));
-		}
-		mergedKmer[byteInMergedKmer] = (byte) ((kmer[offset + length - 1] << 2) | (preCode & 0x3));
-		return mergedKmer;
-	}
-
-	/**
-	 * Merge two kmer to one kmer
-	 * e.g. ACTA + ACCGT => ACTAACCGT
-	 * @param preK : previous k of kmer
-	 * @param kmerPre : bytes array of previous kmer
-	 * @param nextK : next k of kmer
-	 * @param kmerNext : bytes array of next kmer
-	 * @return merged kmer, the new k is @preK + @nextK
-	 */
-	public static byte[] mergeTwoKmer(int preK, byte[] kmerPre, int offsetPre, int lengthPre, int nextK,
-			byte[] kmerNext, int offsetNext, int lengthNext) {
-		int byteNum = Kmer.getByteNumFromK(preK + nextK);
-		byte[] mergedKmer = new byte[byteNum];
-		int i = 1;
-		for (; i <= lengthPre; i++) {
-			mergedKmer[byteNum - i] = kmerPre[offsetPre + lengthPre - i];
-		}
-		if ( i > 1){
-			i--;
-		}
-		if (preK % 4 == 0) {
-			for (int j = 1; j <= lengthNext; j++) {
-				mergedKmer[byteNum - i - j] = kmerNext[offsetNext + lengthNext - j];
-			}
-		} else {
-			int posNeedToMove = ((preK % 4) << 1);
-			mergedKmer[byteNum - i] |= kmerNext[offsetNext + lengthNext - 1] << posNeedToMove;
-			for (int j = 1; j < lengthNext; j++) {
-				mergedKmer[byteNum - i - j] = (byte) (((kmerNext[offsetNext + lengthNext
-						- j] & 0xff) >> (8 - posNeedToMove)) | (kmerNext[offsetNext + lengthNext
-						- j - 1] << posNeedToMove));
-			}
-			if ( nextK % 4 == 0 || (nextK % 4) * 2 + posNeedToMove > 8) {
-				mergedKmer[0] = (byte) ((0xff & kmerNext[offsetNext] )>> (8 - posNeedToMove));
-			}
-		}
-		return mergedKmer;
-	}
-	
-	/**
-	 * Safely shifted the kmer forward without change the input kmer
-	 * e.g. AGCGC shift with T => GCGCT
-	 * @param k: kmer length
-	 * @param kmer: input kmer
-	 * @param afterCode: input genecode 
-	 * @return new created kmer that shifted by afterCode, the K will not change
-	 */
-	public static byte[] shiftKmerWithNextCode(int k, final byte[] kmer, int offset, int length, byte afterCode){
-		byte[] shifted = Arrays.copyOfRange(kmer, offset, offset+length);
-		Kmer.moveKmer(k, shifted, Kmer.GENE_CODE.getSymbolFromCode(afterCode));
-		return shifted;
-	}
-	
-	/**
-	 * Safely shifted the kmer backward without change the input kmer
-	 * e.g. AGCGC shift with T => TAGCG
-	 * @param k: kmer length
-	 * @param kmer: input kmer
-	 * @param preCode: input genecode 
-	 * @return new created kmer that shifted by preCode, the K will not change
-	 */
-	public static byte[] shiftKmerWithPreCode(int k, final byte[] kmer, int offset, int length, byte preCode){
-		byte[] shifted = Arrays.copyOfRange(kmer, offset, offset+length);
-		Kmer.moveKmerReverse(k, shifted, Kmer.GENE_CODE.getSymbolFromCode(preCode));
-		return shifted;
-	}
-
-	public static byte getGeneCodeAtPosition(int pos, int k, final byte[] kmer,
-			int offset, int length) {
-		if (pos >= k) {
-			return -1;
-		}
-		int posByte = pos / 4;
-		int shift = (pos  % 4) << 1;
-		return (byte) ((kmer[offset + length - 1 - posByte] >> shift) & 0x3);
-	}
 }
diff --git a/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/VKmerBytesWritable.java b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/VKmerBytesWritable.java
new file mode 100644
index 0000000..493191a
--- /dev/null
+++ b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/VKmerBytesWritable.java
@@ -0,0 +1,119 @@
+package edu.uci.ics.genomix.type;
+
+import org.apache.hadoop.io.WritableComparator;
+
+public class VKmerBytesWritable extends KmerBytesWritable {
+    /**
+     * 
+     */
+    private static final long serialVersionUID = 1L;
+
+    @Deprecated
+    public VKmerBytesWritable() {
+        super();
+    }
+    
+    public VKmerBytesWritable(int k, byte[] storage){
+        super(k, storage);
+    }
+
+    public VKmerBytesWritable(int k) {
+        super(k);
+    }
+
+    public VKmerBytesWritable(KmerBytesWritable other) {
+        super(other);
+    }
+
+    public void setSize(int size) {
+        if (size > getCapacity()) {
+            setCapacity((size * 3 / 2));
+        }
+        this.size = size;
+    }
+
+    public int getCapacity() {
+        return bytes.length;
+    }
+
+    public void setCapacity(int new_cap) {
+        if (new_cap != getCapacity()) {
+            byte[] new_data = new byte[new_cap];
+            if (new_cap < size) {
+                size = new_cap;
+            }
+            if (size != 0) {
+                System.arraycopy(bytes, 0, new_data, 0, size);
+            }
+            bytes = new_data;
+        }
+    }
+
+    /**
+     * Read Kmer from read text into bytes array e.g. AATAG will compress as
+     * [0x000G, 0xATAA]
+     * 
+     * @param k
+     * @param array
+     * @param start
+     */
+    public void setByRead(int k, byte[] array, int start) {
+        reset(k);
+        super.setByRead(array, start);
+    }
+
+    /**
+     * Compress Reversed Kmer into bytes array AATAG will compress as
+     * [0x000A,0xATAG]
+     * 
+     * @param input
+     *            array
+     * @param start
+     *            position
+     */
+    public void setByReadReverse(int k, byte[] array, int start) {
+        reset(k);
+        super.setByReadReverse(array, start);
+    }
+
+    public void set(KmerBytesWritable newData) {
+        set(newData.kmerlength, newData.bytes, 0, newData.size);
+    }
+
+    public void set(int k, byte[] newData, int offset, int length) {
+        reset(k);
+        System.arraycopy(newData, offset, bytes, 0, size);
+    }
+
+    /**
+     * Reset array by kmerlength
+     * 
+     * @param k
+     */
+    public void reset(int k) {
+        this.kmerlength = k;
+        setSize(0);
+        setSize(KmerUtil.getByteNumFromK(k));
+    }
+
+    public static class Comparator extends WritableComparator {
+        public final int LEAD_BYTES = 4;
+
+        public Comparator() {
+            super(KmerBytesWritable.class);
+        }
+
+        public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
+            int kmerlength1 = readInt(b1, s1);
+            int kmerlength2 = readInt(b2, s2);
+            if (kmerlength1 == kmerlength2) {
+                compareBytes(b1, s1 + LEAD_BYTES, l1 - LEAD_BYTES, b2, s2 + LEAD_BYTES, l2 - LEAD_BYTES);
+            }
+            return kmerlength1 - kmerlength2;
+        }
+    }
+
+    static { // register this comparator
+        WritableComparator.define(KmerBytesWritable.class, new Comparator());
+    }
+}
diff --git a/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/VKmerBytesWritableFactory.java b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/VKmerBytesWritableFactory.java
new file mode 100644
index 0000000..dfc0ee3
--- /dev/null
+++ b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/VKmerBytesWritableFactory.java
@@ -0,0 +1,263 @@
+package edu.uci.ics.genomix.type;
+
+public class VKmerBytesWritableFactory {
+    private VKmerBytesWritable kmer;
+
+    public VKmerBytesWritableFactory(int k) {
+        kmer = new VKmerBytesWritable(k);
+    }
+
+    /**
+     * Read Kmer from read text into bytes array e.g. AATAG will compress as
+     * [0x000G, 0xATAA]
+     * 
+     * @param k
+     * @param array
+     * @param start
+     */
+    public VKmerBytesWritable getKmerByRead(int k, byte[] array, int start) {
+        kmer.setByRead(k, array, start);
+        return kmer;
+    }
+
+    /**
+     * Compress Reversed Kmer into bytes array AATAG will compress as
+     * [0x000A,0xATAG]
+     * 
+     * @param array
+     * @param start
+     */
+    public VKmerBytesWritable getKmerByReadReverse(int k, byte[] array, int start) {
+        kmer.setByReadReverse(k, array, start);
+        return kmer;
+    }
+
+    /**
+     * Get last kmer from kmer-chain.
+     * e.g. kmerChain is AAGCTA, if k =5, it will
+     * return AGCTA
+     * 
+     * @param k
+     * @param kInChain
+     * @param kmerChain
+     * @return LastKmer bytes array
+     */
+    public VKmerBytesWritable getLastKmerFromChain(int lastK, final KmerBytesWritable kmerChain) {
+        if (lastK > kmerChain.getKmerLength()) {
+            return null;
+        }
+        if (lastK == kmerChain.getKmerLength()) {
+            kmer.set(kmerChain);
+            return kmer;
+        }
+        kmer.reset(lastK);
+
+        /** from end to start */
+        int byteInChain = kmerChain.getLength() - 1 - (kmerChain.getKmerLength() - lastK) / 4;
+        int posInByteOfChain = ((kmerChain.getKmerLength() - lastK) % 4) << 1; // *2
+        int byteInKmer = kmer.getLength() - 1;
+        for (; byteInKmer >= 0 && byteInChain > 0; byteInKmer--, byteInChain--) {
+            kmer.getBytes()[byteInKmer] = (byte) ((0xff & kmerChain.getBytes()[byteInChain]) >> posInByteOfChain);
+            kmer.getBytes()[byteInKmer] |= ((kmerChain.getBytes()[byteInChain - 1] << (8 - posInByteOfChain)));
+        }
+
+        /** last kmer byte */
+        if (byteInKmer == 0) {
+            kmer.getBytes()[0] = (byte) ((kmerChain.getBytes()[0] & 0xff) >> posInByteOfChain);
+        }
+        return kmer;
+    }
+
+    /**
+     * Get first kmer from kmer-chain e.g. kmerChain is AAGCTA, if k=5, it will
+     * return AAGCT
+     * 
+     * @param k
+     * @param kInChain
+     * @param kmerChain
+     * @return FirstKmer bytes array
+     */
+    public VKmerBytesWritable getFirstKmerFromChain(int firstK, final KmerBytesWritable kmerChain) {
+        if (firstK > kmerChain.getKmerLength()) {
+            return null;
+        }
+        if (firstK == kmerChain.getKmerLength()) {
+            kmer.set(kmerChain);
+            return kmer;
+        }
+        kmer.reset(firstK);
+
+        int i = 1;
+        for (; i < kmer.getLength(); i++) {
+            kmer.getBytes()[kmer.getLength() - i] = kmerChain.getBytes()[kmerChain.getLength() - i];
+        }
+        int posInByteOfChain = (firstK % 4) << 1; // *2
+        if (posInByteOfChain == 0) {
+            kmer.getBytes()[0] = kmerChain.getBytes()[kmerChain.getLength() - i];
+        } else {
+            kmer.getBytes()[0] = (byte) (kmerChain.getBytes()[kmerChain.getLength() - i] & ((1 << posInByteOfChain) - 1));
+        }
+        return kmer;
+    }
+
+    /**
+     * Merge kmer with next neighbor in gene-code format.
+     * The k of new kmer will increase by 1
+     * e.g. AAGCT merge with A => AAGCTA
+     * 
+     * @param k
+     *            :input k of kmer
+     * @param kmer
+     *            : input bytes of kmer
+     * @param nextCode
+     *            : next neighbor in gene-code format
+     * @return the merged Kmer, this K of this Kmer is k+1
+     */
+    public VKmerBytesWritable mergeKmerWithNextCode(final KmerBytesWritable kmer, byte nextCode) {
+        this.kmer.reset(kmer.getKmerLength() + 1);
+        for (int i = 1; i <= kmer.getLength(); i++) {
+            this.kmer.getBytes()[this.kmer.getLength() - i] = kmer.getBytes()[kmer.getLength() - i];
+        }
+        if (this.kmer.getLength() > kmer.getLength()) {
+            this.kmer.getBytes()[0] = (byte) (nextCode & 0x3);
+        } else {
+            this.kmer.getBytes()[0] = (byte) (kmer.getBytes()[0] | ((nextCode & 0x3) << ((kmer.getKmerLength() % 4) << 1)));
+        }
+        return this.kmer;
+    }
+
+    /**
+     * Merge kmer with previous neighbor in gene-code format.
+     * The k of new kmer will increase by 1
+     * e.g. AAGCT merge with A => AAAGCT
+     * 
+     * @param k
+     *            :input k of kmer
+     * @param kmer
+     *            : input bytes of kmer
+     * @param preCode
+     *            : next neighbor in gene-code format
+     * @return the merged Kmer,this K of this Kmer is k+1
+     */
+    public VKmerBytesWritable mergeKmerWithPreCode(final KmerBytesWritable kmer, byte preCode) {
+        this.kmer.reset(kmer.getKmerLength() + 1);
+        int byteInMergedKmer = 0;
+        if (kmer.getKmerLength() % 4 == 0) {
+            this.kmer.getBytes()[0] = (byte) ((kmer.getBytes()[0] >> 6) & 0x3);
+            byteInMergedKmer++;
+        }
+        for (int i = 0; i < kmer.getLength() - 1; i++, byteInMergedKmer++) {
+            this.kmer.getBytes()[byteInMergedKmer] = (byte) ((kmer.getBytes()[i] << 2) | ((kmer.getBytes()[i + 1] >> 6) & 0x3));
+        }
+        this.kmer.getBytes()[byteInMergedKmer] = (byte) ((kmer.getBytes()[kmer.getLength() - 1] << 2) | (preCode & 0x3));
+        return this.kmer;
+    }
+
+    /**
+     * Merge two kmer to one kmer
+     * e.g. ACTA + ACCGT => ACTAACCGT
+     * 
+     * @param preK
+     *            : previous k of kmer
+     * @param kmerPre
+     *            : bytes array of previous kmer
+     * @param nextK
+     *            : next k of kmer
+     * @param kmerNext
+     *            : bytes array of next kmer
+     * @return merged kmer, the new k is @preK + @nextK
+     */
+    public VKmerBytesWritable mergeTwoKmer(final KmerBytesWritable preKmer, final KmerBytesWritable nextKmer) {
+        kmer.reset(preKmer.getKmerLength() + nextKmer.getKmerLength());
+        int i = 1;
+        for (; i <= preKmer.getLength(); i++) {
+            kmer.getBytes()[kmer.getLength() - i] = preKmer.getBytes()[preKmer.getLength() - i];
+        }
+        if (i > 1) {
+            i--;
+        }
+        if (preKmer.getKmerLength() % 4 == 0) {
+            for (int j = 1; j <= nextKmer.getLength(); j++) {
+                kmer.getBytes()[kmer.getLength() - i - j] = nextKmer.getBytes()[nextKmer.getLength() - j];
+            }
+        } else {
+            int posNeedToMove = ((preKmer.getKmerLength() % 4) << 1);
+            kmer.getBytes()[kmer.getLength() - i] |= nextKmer.getBytes()[nextKmer.getLength() - 1] << posNeedToMove;
+            for (int j = 1; j < nextKmer.getLength(); j++) {
+                kmer.getBytes()[kmer.getLength() - i - j] = (byte) (((nextKmer.getBytes()[nextKmer.getLength() - j] & 0xff) >> (8 - posNeedToMove)) | (nextKmer
+                        .getBytes()[nextKmer.getLength() - j - 1] << posNeedToMove));
+            }
+            if (nextKmer.getKmerLength() % 4 == 0 || (nextKmer.getKmerLength() % 4) * 2 + posNeedToMove > 8) {
+                kmer.getBytes()[0] = (byte) ((0xff & nextKmer.getBytes()[0]) >> (8 - posNeedToMove));
+            }
+        }
+        return kmer;
+    }
+
+    /**
+     * Safely shifted the kmer forward without change the input kmer
+     * e.g. AGCGC shift with T => GCGCT
+     * 
+     * @param k
+     *            : kmer length
+     * @param kmer
+     *            : input kmer
+     * @param afterCode
+     *            : input genecode
+     * @return new created kmer that shifted by afterCode, the K will not change
+     */
+    public VKmerBytesWritable shiftKmerWithNextCode(final KmerBytesWritable kmer, byte afterCode) {
+        this.kmer.set(kmer);
+        this.kmer.shiftKmerWithNextCode(afterCode);
+        return this.kmer;
+    }
+
+    /**
+     * Safely shifted the kmer backward without change the input kmer
+     * e.g. AGCGC shift with T => TAGCG
+     * 
+     * @param k
+     *            : kmer length
+     * @param kmer
+     *            : input kmer
+     * @param preCode
+     *            : input genecode
+     * @return new created kmer that shifted by preCode, the K will not change
+     */
+    public VKmerBytesWritable shiftKmerWithPreCode(final KmerBytesWritable kmer, byte preCode) {
+        this.kmer.set(kmer);
+        this.kmer.shiftKmerWithPreCode(preCode);
+        return this.kmer;
+    }
+
+    /**
+     * get the reverse sequence of given kmer
+     * 
+     * @param kmer
+     */
+    public VKmerBytesWritable reverse(final KmerBytesWritable kmer) {
+        this.kmer.reset(kmer.getKmerLength());
+
+        int curPosAtKmer = ((kmer.getKmerLength() - 1) % 4) << 1;
+        int curByteAtKmer = 0;
+
+        int curPosAtReverse = 0;
+        int curByteAtReverse = this.kmer.getLength() - 1;
+        this.kmer.getBytes()[curByteAtReverse] = 0;
+        for (int i = 0; i < kmer.getKmerLength(); i++) {
+            byte gene = (byte) ((kmer.getBytes()[curByteAtKmer] >> curPosAtKmer) & 0x03);
+            this.kmer.getBytes()[curByteAtReverse] |= gene << curPosAtReverse;
+            curPosAtReverse += 2;
+            if (curPosAtReverse >= 8) {
+                curPosAtReverse = 0;
+                this.kmer.getBytes()[--curByteAtReverse] = 0;
+            }
+            curPosAtKmer -= 2;
+            if (curPosAtKmer < 0) {
+                curPosAtKmer = 6;
+                curByteAtKmer++;
+            }
+        }
+        return this.kmer;
+    }
+}
diff --git a/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/old/Kmer.java b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/old/Kmer.java
new file mode 100644
index 0000000..ee806cc
--- /dev/null
+++ b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/old/Kmer.java
@@ -0,0 +1,285 @@
+package edu.uci.ics.genomix.type.old;
+
+@Deprecated
+public class Kmer {
+    
+    public final static byte[] GENE_SYMBOL = { 'A', 'C', 'G', 'T' };
+
+    public final static class GENE_CODE {
+
+        /**
+         * make sure this 4 ids equal to the sequence id of char in
+         * {@GENE_SYMBOL}
+         */
+        public static final byte A = 0;
+        public static final byte C = 1;
+        public static final byte G = 2;
+        public static final byte T = 3;
+
+        public static byte getCodeFromSymbol(byte ch) {
+            byte r = 0;
+            switch (ch) {
+            case 'A':
+            case 'a':
+                r = A;
+                break;
+            case 'C':
+            case 'c':
+                r = C;
+                break;
+            case 'G':
+            case 'g':
+                r = G;
+                break;
+            case 'T':
+            case 't':
+                r = T;
+                break;
+            }
+            return r;
+        }
+
+        public static byte getSymbolFromCode(byte code) {
+            if (code > 3) {
+                return '!';
+            }
+            return GENE_SYMBOL[code];
+        }
+
+        public static byte getAdjBit(byte t) {
+            byte r = 0;
+            switch (t) {
+            case 'A':
+            case 'a':
+                r = 1 << A;
+                break;
+            case 'C':
+            case 'c':
+                r = 1 << C;
+                break;
+            case 'G':
+            case 'g':
+                r = 1 << G;
+                break;
+            case 'T':
+            case 't':
+                r = 1 << T;
+                break;
+            }
+            return r;
+        }
+
+        /** 
+         * It works for path merge. 
+         * Merge the kmer by his next, we need to make sure the @{t} is a single neighbor.
+         * @param t the neighbor code in BitMap
+         * @return the genecode 
+         */
+        public static byte getGeneCodeFromBitMap(byte t) {
+            switch (t) {
+            case 1 << A:
+                return A;
+            case 1 << C:
+                return C;
+            case 1 << G:
+                return G;
+            case 1 << T:
+                return T;
+            }
+            return -1;
+        }
+
+        public static byte mergePreNextAdj(byte pre, byte next) {
+            return (byte) (pre << 4 | (next & 0x0f));
+        }
+
+        public static String getSymbolFromBitMap(byte code) {
+            int left = (code >> 4) & 0x0F;
+            int right = code & 0x0F;
+            StringBuilder str = new StringBuilder();
+            for (int i = A; i <= T; i++) {
+                if ((left & (1 << i)) != 0) {
+                    str.append((char) GENE_SYMBOL[i]);
+                }
+            }
+            str.append('|');
+            for (int i = A; i <= T; i++) {
+                if ((right & (1 << i)) != 0) {
+                    str.append((char) GENE_SYMBOL[i]);
+                }
+            }
+            return str.toString();
+        }
+    }
+
+    public static String recoverKmerFrom(int k, byte[] keyData, int keyStart,
+            int keyLength) {
+        StringBuilder strKmer = new StringBuilder();
+        int byteId = keyStart + keyLength - 1;
+        byte currentbyte = keyData[byteId];
+        for (int geneCount = 0; geneCount < k; geneCount++) {
+            if (geneCount % 4 == 0 && geneCount > 0) {
+                currentbyte = keyData[--byteId];
+            }
+            strKmer.append((char) GENE_SYMBOL[(currentbyte >> ((geneCount % 4) * 2)) & 0x03]);
+        }
+        return strKmer.toString();
+    }
+
+    public static int getByteNumFromK(int k) {
+        int x = k / 4;
+        if (k % 4 != 0) {
+            x += 1;
+        }
+        return x;
+    }
+
+    /**
+     * Compress Kmer into bytes array AATAG will compress as [0x000G, 0xATAA]
+     * 
+     * @param kmer
+     * @param input
+     *            array
+     * @param start
+     *            position
+     * @return initialed kmer array
+     */
+    public static byte[] compressKmer(int k, byte[] array, int start) {
+        final int byteNum = getByteNumFromK(k);
+        byte[] bytes = new byte[byteNum];
+
+        byte l = 0;
+        int bytecount = 0;
+        int bcount = byteNum - 1;
+        for (int i = start; i < start + k; i++) {
+            byte code = GENE_CODE.getCodeFromSymbol(array[i]);
+            l |= (byte) (code << bytecount);
+            bytecount += 2;
+            if (bytecount == 8) {
+                bytes[bcount--] = l;
+                l = 0;
+                bytecount = 0;
+            }
+        }
+        if (bcount >= 0) {
+            bytes[0] = l;
+        }
+        return bytes;
+    }
+
+    /**
+     * Shift Kmer to accept new input
+     * 
+     * @param kmer
+     * @param bytes
+     *            Kmer Array
+     * @param c
+     *            Input new gene character
+     * @return the shiftout gene, in gene code format
+     */
+    public static byte moveKmer(int k, byte[] kmer, byte c) {
+        int byteNum = kmer.length;
+        byte output = (byte) (kmer[byteNum - 1] & 0x03);
+        for (int i = byteNum - 1; i > 0; i--) {
+            byte in = (byte) (kmer[i - 1] & 0x03);
+            kmer[i] = (byte) (((kmer[i] >>> 2) & 0x3f) | (in << 6));
+        }
+        int pos = ((k - 1) % 4) << 1;
+        byte code = (byte) (GENE_CODE.getCodeFromSymbol(c) << pos);
+        kmer[0] = (byte) (((kmer[0] >>> 2) & 0x3f) | code);
+        return (byte) (1 << output);
+    }
+
+    public static byte reverseKmerByte(byte k) {
+        int x = (((k >> 2) & 0x33) | ((k << 2) & 0xcc));
+        return (byte) (((x >> 4) & 0x0f) | ((x << 4) & 0xf0));
+    }
+
+    public static byte[] reverseKmer(int k, byte[] kmer) {
+        byte[] reverseKmer = new byte[kmer.length];
+
+        int curPosAtKmer = ((k - 1) % 4) << 1;
+        int curByteAtKmer = 0;
+
+        int curPosAtReverse = 0;
+        int curByteAtReverse = reverseKmer.length - 1;
+        reverseKmer[curByteAtReverse] = 0;
+        for (int i = 0; i < k; i++) {
+            byte gene = (byte) ((kmer[curByteAtKmer] >> curPosAtKmer) & 0x03);
+            reverseKmer[curByteAtReverse] |= gene << curPosAtReverse;
+            curPosAtReverse += 2;
+            if (curPosAtReverse >= 8) {
+                curPosAtReverse = 0;
+                reverseKmer[--curByteAtReverse] = 0;
+            }
+            curPosAtKmer -= 2;
+            if (curPosAtKmer < 0) {
+                curPosAtKmer = 6;
+                curByteAtKmer++;
+            }
+        }
+
+        return reverseKmer;
+    }
+
+    /**
+     * Compress Reversed Kmer into bytes array AATAG will compress as
+     * [0x000A,0xATAG]
+     * 
+     * @param kmer
+     * @param input
+     *            array
+     * @param start
+     *            position
+     * @return initialed kmer array
+     */
+    public static byte[] compressKmerReverse(int k, byte[] array, int start) {
+        final int byteNum = getByteNumFromK(k);
+        byte[] bytes = new byte[byteNum];
+
+        byte l = 0;
+        int bytecount = 0;
+        int bcount = byteNum - 1;
+        for (int i = start + k - 1; i >= 0; i--) {
+            byte code = GENE_CODE.getCodeFromSymbol(array[i]);
+            l |= (byte) (code << bytecount);
+            bytecount += 2;
+            if (bytecount == 8) {
+                bytes[bcount--] = l;
+                l = 0;
+                bytecount = 0;
+            }
+        }
+        if (bcount >= 0) {
+            bytes[0] = l;
+        }
+        return bytes;
+    }
+
+    /**
+     * Shift Kmer to accept new input
+     * 
+     * @param kmer
+     * @param bytes
+     *            Kmer Array
+     * @param c
+     *            Input new gene character
+     * @return the shiftout gene, in gene code format
+     */
+    public static byte moveKmerReverse(int k, byte[] kmer, byte c) {
+        int pos = ((k - 1) % 4) << 1;
+        byte output = (byte) ((kmer[0] >> pos) & 0x03);
+        for (int i = 0; i < kmer.length - 1; i++) {
+            byte in = (byte) ((kmer[i + 1] >> 6) & 0x03);
+            kmer[i] = (byte) ((kmer[i] << 2) | in);
+        }
+        // (k%4) * 2
+        if (k % 4 != 0) {
+            kmer[0] &= (1 << ((k % 4) << 1)) - 1;
+        }
+        kmer[kmer.length - 1] = (byte) ((kmer[kmer.length - 1] << 2) | GENE_CODE
+                .getCodeFromSymbol(c));
+        return (byte) (1 << output);
+    }
+
+}
diff --git a/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/old/KmerBytesWritable.java b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/old/KmerBytesWritable.java
new file mode 100644
index 0000000..dd76427
--- /dev/null
+++ b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/old/KmerBytesWritable.java
@@ -0,0 +1,138 @@
+package edu.uci.ics.genomix.type.old;
+
+import java.io.IOException;
+import java.io.DataInput;
+import java.io.DataOutput;
+import org.apache.hadoop.io.BinaryComparable;
+import org.apache.hadoop.io.WritableComparable;
+import org.apache.hadoop.io.WritableComparator;
+
+@Deprecated
+public class KmerBytesWritable extends BinaryComparable implements
+        WritableComparable<BinaryComparable> {
+    private static final int LENGTH_BYTES = 4;
+    private static final byte[] EMPTY_BYTES = {};
+    private byte size;
+    private byte[] bytes;
+
+    public KmerBytesWritable() {
+        this(EMPTY_BYTES);
+    }
+
+    public KmerBytesWritable(byte[] bytes) {
+        this.bytes = bytes;
+        this.size = (byte) bytes.length;
+    }
+
+    @Override
+    public byte[] getBytes() {
+        return bytes;
+    }
+
+    @Deprecated
+    public byte[] get() {
+        return getBytes();
+    }
+
+    @Override
+    public int getLength() {
+        return (int) size;
+    }
+
+    @Deprecated
+    public int getSize() {
+        return getLength();
+    }
+
+    public void setSize(byte size) {
+        if ((int) size > getCapacity()) {
+            setCapacity((byte) (size * 3 / 2));
+        }
+        this.size = size;
+    }
+
+    public int getCapacity() {
+        return bytes.length;
+    }
+
+    public void setCapacity(byte new_cap) {
+        if (new_cap != getCapacity()) {
+            byte[] new_data = new byte[new_cap];
+            if (new_cap < size) {
+                size = new_cap;
+            }
+            if (size != 0) {
+                System.arraycopy(bytes, 0, new_data, 0, size);
+            }
+            bytes = new_data;
+        }
+    }
+
+    public void set(KmerBytesWritable newData) {
+        set(newData.bytes, (byte) 0, newData.size);
+    }
+
+    public void set(byte[] newData, byte offset, byte length) {
+        setSize((byte) 0);
+        setSize(length);
+        System.arraycopy(newData, offset, bytes, 0, size);
+    }
+
+    public void readFields(DataInput in) throws IOException {
+        setSize((byte) 0); // clear the old data
+        setSize(in.readByte());
+        in.readFully(bytes, 0, size);
+    }
+
+    @Override
+    public void write(DataOutput out) throws IOException {
+        out.writeByte(size);
+        out.write(bytes, 0, size);
+    }
+
+    @Override
+    public int hashCode() {
+        return super.hashCode();
+    }
+
+    @Override
+    public boolean equals(Object right_obj) {
+        if (right_obj instanceof KmerBytesWritable)
+            return super.equals(right_obj);
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        StringBuffer sb = new StringBuffer(3 * size);
+        for (int idx = 0; idx < (int) size; idx++) {
+            // if not the first, put a blank separator in
+            if (idx != 0) {
+                sb.append(' ');
+            }
+            String num = Integer.toHexString(0xff & bytes[idx]);
+            // if it is only one digit, add a leading 0.
+            if (num.length() < 2) {
+                sb.append('0');
+            }
+            sb.append(num);
+        }
+        return sb.toString();
+    }
+
+    public static class Comparator extends WritableComparator {
+        public Comparator() {
+            super(KmerBytesWritable.class);
+        }
+
+        public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
+            return compareBytes(b1, s1 + LENGTH_BYTES, l1 - LENGTH_BYTES, b2,
+                    s2 + LENGTH_BYTES, l2 - LENGTH_BYTES);
+        }
+    }
+
+    static { // register this comparator
+        WritableComparator.define(KmerBytesWritable.class, new Comparator());
+    }
+
+}
diff --git a/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/old/KmerUtil.java b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/old/KmerUtil.java
new file mode 100644
index 0000000..7e9d2f3
--- /dev/null
+++ b/genomix/genomix-data/src/main/java/edu/uci/ics/genomix/type/old/KmerUtil.java
@@ -0,0 +1,223 @@
+package edu.uci.ics.genomix.type.old;
+
+import java.util.Arrays;
+
+@Deprecated
+public class KmerUtil {
+
+    public static int countNumberOfBitSet(int i) {
+        int c = 0;
+        for (; i != 0; c++) {
+            i &= i - 1;
+        }
+        return c;
+    }
+
+    public static int inDegree(byte bitmap) {
+        return countNumberOfBitSet((bitmap >> 4) & 0x0f);
+    }
+
+    public static int outDegree(byte bitmap) {
+        return countNumberOfBitSet(bitmap & 0x0f);
+    }
+
+    /**
+     * Get last kmer from kmer-chain. 
+     * e.g. kmerChain is AAGCTA, if k =5, it will
+     * return AGCTA
+     * @param k
+     * @param kInChain
+     * @param kmerChain
+     * @return LastKmer bytes array
+     */
+    public static byte[] getLastKmerFromChain(int k, int kInChain,
+            byte[] kmerChain, int offset, int length) {
+        if (k > kInChain) {
+            return null;
+        }
+        if (k == kInChain) {
+            return kmerChain.clone();
+        }
+        int byteNum = Kmer.getByteNumFromK(k);
+        byte[] kmer = new byte[byteNum];
+
+        /** from end to start */
+        int byteInChain = length - 1 - (kInChain - k) / 4;
+        int posInByteOfChain = ((kInChain - k) % 4) << 1; // *2
+        int byteInKmer = byteNum - 1;
+        for (; byteInKmer >= 0 && byteInChain > 0; byteInKmer--, byteInChain--) {
+            kmer[byteInKmer] = (byte) ((0xff & kmerChain[offset + byteInChain]) >> posInByteOfChain);
+            kmer[byteInKmer] |= ((kmerChain[offset + byteInChain - 1] << (8 - posInByteOfChain)));
+        }
+
+        /** last kmer byte */
+        if (byteInKmer == 0) {
+            kmer[0] = (byte) ((kmerChain[offset] & 0xff) >> posInByteOfChain);
+        }
+        return kmer;
+    }
+
+    /**
+     * Get first kmer from kmer-chain e.g. kmerChain is AAGCTA, if k=5, it will
+     * return AAGCT
+     * 
+     * @param k
+     * @param kInChain
+     * @param kmerChain
+     * @return FirstKmer bytes array
+     */
+    public static byte[] getFirstKmerFromChain(int k, int kInChain,
+            byte[] kmerChain, int offset, int length) {
+        if (k > kInChain) {
+            return null;
+        }
+        if (k == kInChain) {
+            return kmerChain.clone();
+        }
+        int byteNum = Kmer.getByteNumFromK(k);
+        byte[] kmer = new byte[byteNum];
+
+        int i = 1;
+        for (; i < kmer.length; i++) {
+            kmer[kmer.length - i] = kmerChain[offset + length - i];
+        }
+        int posInByteOfChain = (k % 4) << 1; // *2
+        if (posInByteOfChain == 0) {
+            kmer[0] = kmerChain[offset + length - i];
+        } else {
+            kmer[0] = (byte) (kmerChain[offset + length - i] & ((1 << posInByteOfChain) - 1));
+        }
+        return kmer;
+    }
+
+    /**
+     * Merge kmer with next neighbor in gene-code format.
+     * The k of new kmer will increase by 1
+     * e.g. AAGCT merge with A => AAGCTA
+     * @param k :input k of kmer
+     * @param kmer : input bytes of kmer
+     * @param nextCode: next neighbor in gene-code format
+     * @return the merged Kmer, this K of this Kmer is k+1
+     */
+    public static byte[] mergeKmerWithNextCode(int k, byte[] kmer, int offset, int length, byte nextCode) {
+        int byteNum = length;
+        if (k % 4 == 0) {
+            byteNum++;
+        }
+        byte[] mergedKmer = new byte[byteNum];
+        for (int i = 1; i <= length; i++) {
+            mergedKmer[mergedKmer.length - i] = kmer[offset + length - i];
+        }
+        if (mergedKmer.length > length) {
+            mergedKmer[0] = (byte) (nextCode & 0x3);
+        } else {
+            mergedKmer[0] = (byte) (kmer[offset] | ((nextCode & 0x3) << ((k % 4) << 1)));
+        }
+        return mergedKmer;
+    }
+
+    /**
+     * Merge kmer with previous neighbor in gene-code format.
+     * The k of new kmer will increase by 1
+     * e.g. AAGCT merge with A => AAAGCT
+     * @param k :input k of kmer
+     * @param kmer : input bytes of kmer
+     * @param preCode: next neighbor in gene-code format
+     * @return the merged Kmer,this K of this Kmer is k+1
+     */
+    public static byte[] mergeKmerWithPreCode(int k, byte[] kmer, int offset, int length, byte preCode) {
+        int byteNum = length;
+        byte[] mergedKmer = null;
+        int byteInMergedKmer = 0;
+        if (k % 4 == 0) {
+            byteNum++;
+            mergedKmer = new byte[byteNum];
+            mergedKmer[0] = (byte) ((kmer[offset] >> 6) & 0x3);
+            byteInMergedKmer++;
+        } else {
+            mergedKmer = new byte[byteNum];
+        }
+        for (int i = 0; i < length - 1; i++, byteInMergedKmer++) {
+            mergedKmer[byteInMergedKmer] = (byte) ((kmer[offset + i] << 2) | ((kmer[offset + i + 1] >> 6) & 0x3));
+        }
+        mergedKmer[byteInMergedKmer] = (byte) ((kmer[offset + length - 1] << 2) | (preCode & 0x3));
+        return mergedKmer;
+    }
+
+    /**
+     * Merge two kmer to one kmer
+     * e.g. ACTA + ACCGT => ACTAACCGT
+     * @param preK : previous k of kmer
+     * @param kmerPre : bytes array of previous kmer
+     * @param nextK : next k of kmer
+     * @param kmerNext : bytes array of next kmer
+     * @return merged kmer, the new k is @preK + @nextK
+     */
+    public static byte[] mergeTwoKmer(int preK, byte[] kmerPre, int offsetPre, int lengthPre, int nextK,
+            byte[] kmerNext, int offsetNext, int lengthNext) {
+        int byteNum = Kmer.getByteNumFromK(preK + nextK);
+        byte[] mergedKmer = new byte[byteNum];
+        int i = 1;
+        for (; i <= lengthPre; i++) {
+            mergedKmer[byteNum - i] = kmerPre[offsetPre + lengthPre - i];
+        }
+        if ( i > 1){
+            i--;
+        }
+        if (preK % 4 == 0) {
+            for (int j = 1; j <= lengthNext; j++) {
+                mergedKmer[byteNum - i - j] = kmerNext[offsetNext + lengthNext - j];
+            }
+        } else {
+            int posNeedToMove = ((preK % 4) << 1);
+            mergedKmer[byteNum - i] |= kmerNext[offsetNext + lengthNext - 1] << posNeedToMove;
+            for (int j = 1; j < lengthNext; j++) {
+                mergedKmer[byteNum - i - j] = (byte) (((kmerNext[offsetNext + lengthNext
+                        - j] & 0xff) >> (8 - posNeedToMove)) | (kmerNext[offsetNext + lengthNext
+                        - j - 1] << posNeedToMove));
+            }
+            if ( (nextK % 4) * 2 + posNeedToMove > 8) {
+                mergedKmer[0] = (byte) (kmerNext[offsetNext] >> (8 - posNeedToMove));
+            }
+        }
+        return mergedKmer;
+    }
+    
+    /**
+     * Safely shifted the kmer forward without change the input kmer
+     * e.g. AGCGC shift with T => GCGCT
+     * @param k: kmer length
+     * @param kmer: input kmer
+     * @param afterCode: input genecode 
+     * @return new created kmer that shifted by afterCode, the K will not change
+     */
+    public static byte[] shiftKmerWithNextCode(int k, final byte[] kmer, int offset, int length, byte afterCode){
+        byte[] shifted = Arrays.copyOfRange(kmer, offset, offset+length);
+        Kmer.moveKmer(k, shifted, Kmer.GENE_CODE.getSymbolFromCode(afterCode));
+        return shifted;
+    }
+    
+    /**
+     * Safely shifted the kmer backward without change the input kmer
+     * e.g. AGCGC shift with T => TAGCG
+     * @param k: kmer length
+     * @param kmer: input kmer
+     * @param preCode: input genecode 
+     * @return new created kmer that shifted by preCode, the K will not change
+     */
+    public static byte[] shiftKmerWithPreCode(int k, final byte[] kmer, int offset, int length, byte preCode){
+        byte[] shifted = Arrays.copyOfRange(kmer, offset, offset+length);
+        Kmer.moveKmerReverse(k, shifted, Kmer.GENE_CODE.getSymbolFromCode(preCode));
+        return shifted;
+    }
+
+    public static byte getGeneCodeAtPosition(int pos, int k, final byte[] kmer,
+            int offset, int length) {
+        if (pos >= k) {
+            return -1;
+        }
+        int posByte = pos / 4;
+        int shift = (pos  % 4) << 1;
+        return (byte) ((kmer[offset + length - 1 - posByte] >> shift) & 0x3);
+    }
+}
diff --git a/genomix/genomix-data/src/test/java/edu/uci/ics/genomix/example/kmer/KmerBytesWritableTest.java b/genomix/genomix-data/src/test/java/edu/uci/ics/genomix/example/kmer/KmerBytesWritableTest.java
new file mode 100644
index 0000000..f21da91
--- /dev/null
+++ b/genomix/genomix-data/src/test/java/edu/uci/ics/genomix/example/kmer/KmerBytesWritableTest.java
@@ -0,0 +1,78 @@
+package edu.uci.ics.genomix.example.kmer;
+
+import junit.framework.Assert;
+
+import org.junit.Test;
+
+import edu.uci.ics.genomix.type.GeneCode;
+import edu.uci.ics.genomix.type.KmerBytesWritable;
+
+public class KmerBytesWritableTest {
+    static byte[] array = { 'A', 'A', 'T', 'A', 'G', 'A', 'A', 'G' };
+    static int k = 7;
+
+    @Test
+    public void TestCompressKmer() {
+        KmerBytesWritable kmer = new KmerBytesWritable(k);
+        kmer.setByRead(array, 0);
+        Assert.assertEquals(kmer.toString(), "AATAGAA");
+
+        kmer.setByRead(array, 1);
+        Assert.assertEquals(kmer.toString(), "ATAGAAG");
+    }
+
+    @Test
+    public void TestMoveKmer() {
+        KmerBytesWritable kmer = new KmerBytesWritable(k);
+        kmer.setByRead(array, 0);
+        Assert.assertEquals(kmer.toString(), "AATAGAA");
+
+        for (int i = k; i < array.length - 1; i++) {
+            kmer.shiftKmerWithNextCode(array[i]);
+            Assert.assertTrue(false);
+        }
+
+        byte out = kmer.shiftKmerWithNextChar(array[array.length - 1]);
+        Assert.assertEquals(out, GeneCode.getAdjBit((byte) 'A'));
+        Assert.assertEquals(kmer.toString(), "ATAGAAG");
+    }
+
+    @Test
+    public void TestCompressKmerReverse() {
+        KmerBytesWritable kmer = new KmerBytesWritable(k);
+        kmer.setByRead(array, 0);
+        Assert.assertEquals(kmer.toString(), "AATAGAA");
+
+        kmer.setByReadReverse(array, 1);
+        Assert.assertEquals(kmer.toString(), "GAAGATA");
+    }
+
+    @Test
+    public void TestMoveKmerReverse() {
+        KmerBytesWritable kmer = new KmerBytesWritable(k);
+        kmer.setByRead(array, 0);
+        Assert.assertEquals(kmer.toString(), "AATAGAA");
+
+        for (int i = k; i < array.length - 1; i++) {
+            kmer.shiftKmerWithPreChar(array[i]);
+            Assert.assertTrue(false);
+        }
+
+        byte out = kmer.shiftKmerWithPreChar(array[array.length - 1]);
+        Assert.assertEquals(out, GeneCode.getAdjBit((byte) 'A'));
+        Assert.assertEquals(kmer.toString(), "GAATAGA");
+    }
+
+    @Test
+    public void TestGetGene() {
+        KmerBytesWritable kmer = new KmerBytesWritable(9);
+        String text = "AGCTGACCG";
+        byte[] array = { 'A', 'G', 'C', 'T', 'G', 'A', 'C', 'C', 'G' };
+        kmer.setByRead(array, 0);
+
+        for (int i = 0; i < 9; i++) {
+            Assert.assertEquals(text.charAt(i), (char) (GeneCode.getSymbolFromCode(kmer.getGeneCodeAtPosition(i))));
+        }
+    }
+
+}
diff --git a/genomix/genomix-data/src/test/java/edu/uci/ics/genomix/example/kmer/KmerTest.java b/genomix/genomix-data/src/test/java/edu/uci/ics/genomix/example/kmer/KmerTest.java
deleted file mode 100644
index d9c1846..0000000
--- a/genomix/genomix-data/src/test/java/edu/uci/ics/genomix/example/kmer/KmerTest.java
+++ /dev/null
@@ -1,81 +0,0 @@
-package edu.uci.ics.genomix.example.kmer;
-
-import junit.framework.Assert;
-
-import org.junit.Test;
-
-import edu.uci.ics.genomix.type.Kmer;
-
-public class KmerTest {
-	static byte[] array = { 'A', 'A', 'T', 'A', 'G', 'A', 'A', 'G' };
-	static int k = 7;
-	
-	@Test
-	public void TestCompressKmer() {
-		byte[] kmer = Kmer.compressKmer(k, array, 0);
-		String result = Kmer.recoverKmerFrom(k, kmer, 0, kmer.length);
-		Assert.assertEquals(result, "AATAGAA");
-		
-		kmer = Kmer.compressKmer(k, array, 1);
-		result = Kmer.recoverKmerFrom(k, kmer, 0, kmer.length);
-		Assert.assertEquals(result, "ATAGAAG");
-	}
-	
-	@Test
-	public void TestMoveKmer(){
-		byte[] kmer = Kmer.compressKmer(k, array, 0);
-		String result = Kmer.recoverKmerFrom(k, kmer, 0, kmer.length); 
-		Assert.assertEquals(result, "AATAGAA");
-		
-		for (int i = k; i < array.length-1; i++) {
-			Kmer.moveKmer(k, kmer, array[i]);
-			Assert.assertTrue(false);
-		}
-
-		byte out = Kmer.moveKmer(k, kmer, array[array.length - 1]);
-		Assert.assertEquals(out, Kmer.GENE_CODE.getAdjBit((byte) 'A'));
-		result = Kmer.recoverKmerFrom(k, kmer, 0, kmer.length);
-		Assert.assertEquals(result, "ATAGAAG");
-	}
-
-	
-	@Test
-	public void TestReverseKmer(){
-		byte[] kmer = Kmer.compressKmer(k, array, 0);
-		String result = Kmer.recoverKmerFrom(k, kmer, 0, kmer.length);
-		Assert.assertEquals(result, "AATAGAA");
-		byte[] reversed = Kmer.reverseKmer(k, kmer);
-		result = Kmer.recoverKmerFrom(k, reversed, 0, kmer.length);
-		Assert.assertEquals(result, "AAGATAA");
-	}
-	
-	@Test
-	public void TestCompressKmerReverse() {
-		byte[] kmer = Kmer.compressKmerReverse(k, array, 0);
-		String result = Kmer.recoverKmerFrom(k, kmer, 0, kmer.length);
-		Assert.assertEquals(result, "AAGATAA");
-		
-		kmer = Kmer.compressKmerReverse(k, array, 1);
-		result = Kmer.recoverKmerFrom(k, kmer, 0, kmer.length);
-		Assert.assertEquals(result, "GAAGATA");
-	}
-	
-	@Test
-	public void TestMoveKmerReverse(){
-		byte[] kmer = Kmer.compressKmerReverse(k, array, 0);
-		String result = Kmer.recoverKmerFrom(k, kmer, 0, kmer.length);
-		Assert.assertEquals(result, "AAGATAA");
-		
-		for (int i = k; i < array.length-1; i++) {
-			Kmer.moveKmerReverse(k, kmer, array[i]);
-			Assert.assertTrue(false);
-		}
-
-		byte out = Kmer.moveKmerReverse(k, kmer, array[array.length - 1]);
-		Assert.assertEquals(out, Kmer.GENE_CODE.getAdjBit((byte) 'A'));
-		result = Kmer.recoverKmerFrom(k, kmer, 0, kmer.length);
-		Assert.assertEquals(result, "GAAGATA");
-	}
-
-
-}
diff --git a/genomix/genomix-data/src/test/java/edu/uci/ics/genomix/example/kmer/KmerUtilTest.java b/genomix/genomix-data/src/test/java/edu/uci/ics/genomix/example/kmer/KmerUtilTest.java
deleted file mode 100644
index 854bb47..0000000
--- a/genomix/genomix-data/src/test/java/edu/uci/ics/genomix/example/kmer/KmerUtilTest.java
+++ /dev/null
@@ -1,138 +0,0 @@
-package edu.uci.ics.genomix.example.kmer;
-
-import org.junit.Assert;
-import org.junit.Test;
-
-import edu.uci.ics.genomix.type.Kmer;
-import edu.uci.ics.genomix.type.KmerUtil;
-
-public class KmerUtilTest {
-	static byte[] array = { 'A', 'G', 'C', 'T', 'G', 'A', 'C', 'C','G','T'};
-	
-	@Test
-	public void TestDegree(){
-		Assert.assertTrue(KmerUtil.inDegree((byte) 0xff) == 4); 
-		Assert.assertTrue(KmerUtil.outDegree((byte) 0xff) == 4);
-		Assert.assertTrue(KmerUtil.inDegree((byte) 0x3f) == 2);
-		Assert.assertTrue(KmerUtil.outDegree((byte) 0x01) == 1);
-		Assert.assertTrue(KmerUtil.inDegree((byte) 0x01) == 0);
-	}
-	
-	@Test
-	public void TestGetLastKmer(){
-		byte[] kmerChain = Kmer.compressKmer(9, array, 0);
-		Assert.assertEquals("AGCTGACCG", Kmer.recoverKmerFrom(9, kmerChain, 0, kmerChain.length));
-		byte[] lastKmer ;
-		for(int i = 8; i>0 ; i--){
-			lastKmer = KmerUtil.getLastKmerFromChain(i, 9, kmerChain, 0, kmerChain.length);
-//			System.out.println(Kmer.recoverKmerFrom(i, lastKmer, 0, lastKmer.length));
-			Assert.assertEquals("AGCTGACCG".substring(9-i), Kmer.recoverKmerFrom(i, lastKmer, 0, lastKmer.length));
-		}
-	}
-	
-	@Test
-	public void TestMergeNext(){
-		byte[] kmer = Kmer.compressKmer(9, array, 0);
-		String text = "AGCTGACCG";
-		Assert.assertEquals(text, Kmer.recoverKmerFrom(9, kmer, 0, kmer.length));
-		for(byte x = Kmer.GENE_CODE.A; x<= Kmer.GENE_CODE.T ; x++){
-			kmer = KmerUtil.mergeKmerWithNextCode(9+x, kmer, 0, kmer.length, x);
-//			System.out.println(Kmer.recoverKmerFrom(9+x+1, kmer, 0, kmer.length));
-			text = text + (char)Kmer.GENE_SYMBOL[x];
-			Assert.assertEquals(text, Kmer.recoverKmerFrom(9+x+1, kmer, 0, kmer.length));
-		}
-		for(byte x = Kmer.GENE_CODE.A; x<= Kmer.GENE_CODE.T ; x++){
-			kmer = KmerUtil.mergeKmerWithNextCode(13+x, kmer,0, kmer.length, x);
-//			System.out.println(Kmer.recoverKmerFrom(13+x+1, kmer, 0, kmer.length));
-			text = text + (char)Kmer.GENE_SYMBOL[x];
-			Assert.assertEquals(text, Kmer.recoverKmerFrom(13+x+1, kmer, 0, kmer.length));
-		}
-	}
-	
-	@Test
-	public void TestMergePre(){
-		byte[] kmer = Kmer.compressKmer(9, array, 0);
-		String text = "AGCTGACCG";
-		Assert.assertEquals(text, Kmer.recoverKmerFrom(9, kmer, 0, kmer.length));
-		for(byte x = Kmer.GENE_CODE.A; x<= Kmer.GENE_CODE.T ; x++){
-			kmer = KmerUtil.mergeKmerWithPreCode(9+x, kmer, 0, kmer.length,x);
-//			System.out.println(Kmer.recoverKmerFrom(9+x+1, kmer, 0, kmer.length));
-			text = (char)Kmer.GENE_SYMBOL[x] + text;
-			Assert.assertEquals(text , Kmer.recoverKmerFrom(9+x+1, kmer, 0, kmer.length));
-		}
-		for(byte x = Kmer.GENE_CODE.A; x<= Kmer.GENE_CODE.T ; x++){
-			kmer = KmerUtil.mergeKmerWithPreCode(13+x, kmer,0, kmer.length, x);
-//			System.out.println(Kmer.recoverKmerFrom(13+x+1, kmer, 0, kmer.length));
-			text = (char)Kmer.GENE_SYMBOL[x] + text;
-			Assert.assertEquals(text , Kmer.recoverKmerFrom(13+x+1, kmer, 0, kmer.length));
-		}
-	}
-	
-	@Test
-	public void TestMergeTwoKmer(){
-		byte[] kmer1 = Kmer.compressKmer(9, array, 0);
-		String text1 = "AGCTGACCG";
-		byte[] kmer2 = Kmer.compressKmer(9, array, 1);
-		String text2 = "GCTGACCGT";
-		Assert.assertEquals(text1, Kmer.recoverKmerFrom(9, kmer1, 0, kmer1.length));
-		Assert.assertEquals(text2, Kmer.recoverKmerFrom(9, kmer2, 0, kmer2.length));
-		
-		byte[] merged = KmerUtil.mergeTwoKmer(9, kmer1,0,kmer1.length, 9, kmer2,0,kmer2.length);
-		Assert.assertEquals(text1+text2, Kmer.recoverKmerFrom(9+9, merged, 0, merged.length));
-		
-		byte[] kmer3 = Kmer.compressKmer(3, array, 1);
-		String text3 = "GCT";
-		Assert.assertEquals(text3, Kmer.recoverKmerFrom(3, kmer3, 0, kmer3.length));
-		merged = KmerUtil.mergeTwoKmer(9, kmer1, 0 , kmer1.length, 3, kmer3, 0, kmer3.length);
-		Assert.assertEquals(text1+text3, Kmer.recoverKmerFrom(9+3, merged, 0, merged.length));
-		merged = KmerUtil.mergeTwoKmer(3, kmer3, 0 , kmer3.length, 9, kmer1, 0, kmer1.length);
-		Assert.assertEquals(text3+text1, Kmer.recoverKmerFrom(9+3, merged, 0, merged.length));
-		
-		byte[] kmer4 = Kmer.compressKmer(8, array, 0);
-		String text4 = "AGCTGACC";
-		Assert.assertEquals(text4, Kmer.recoverKmerFrom(8, kmer4, 0, kmer4.length));
-		merged = KmerUtil.mergeTwoKmer(8, kmer4, 0, kmer4.length, 3, kmer3, 0, kmer3.length);
-		Assert.assertEquals(text4+text3, Kmer.recoverKmerFrom(8+3, merged, 0, merged.length));
-		
-		byte[] kmer5 = Kmer.compressKmer(7, array, 0);
-		String text5 = "AGCTGAC";
-		byte[] kmer6 = Kmer.compressKmer(9, array, 1);
-		String text6 = "GCTGACCGT";
-		merged = KmerUtil.mergeTwoKmer(7, kmer5, 0, kmer5.length,9, kmer6, 0, kmer6.length);
-		Assert.assertEquals(text5+text6, Kmer.recoverKmerFrom(7+9, merged, 0, merged.length));
-		
-		byte[] kmer7 = Kmer.compressKmer(6, array, 1);
-		String text7 = "GCTGAC";
-		merged = KmerUtil.mergeTwoKmer(7, kmer5, 0, kmer5.length, 6, kmer7, 0, kmer7.length);
-		Assert.assertEquals(text5+text7, Kmer.recoverKmerFrom(7+6, merged, 0, merged.length));
-		
-		byte[] kmer8 = Kmer.compressKmer(4, array, 1);
-		String text8 = "GCTG";
-		merged = KmerUtil.mergeTwoKmer(7, kmer5, 0, kmer5.length, 4, kmer8, 0, kmer8.length);
-		Assert.assertEquals(text5+text8, Kmer.recoverKmerFrom(7+4, merged, 0, merged.length));
-
-	}
-	@Test 
-	public void TestShift(){
-		byte[] kmer = Kmer.compressKmer(9, array, 0);
-		String text = "AGCTGACCG";
-		Assert.assertEquals(text, Kmer.recoverKmerFrom(9, kmer, 0, kmer.length));
-		
-		byte [] kmerForward = KmerUtil.shiftKmerWithNextCode(9, kmer,0, kmer.length, Kmer.GENE_CODE.A);
-		Assert.assertEquals(text, Kmer.recoverKmerFrom(9, kmer, 0, kmer.length));
-		Assert.assertEquals("GCTGACCGA", Kmer.recoverKmerFrom(9, kmerForward, 0, kmerForward.length));
-		byte [] kmerBackward = KmerUtil.shiftKmerWithPreCode(9, kmer,0, kmer.length,Kmer.GENE_CODE.C);
-		Assert.assertEquals(text, Kmer.recoverKmerFrom(9, kmer, 0, kmer.length));
-		Assert.assertEquals("CAGCTGACC", Kmer.recoverKmerFrom(9, kmerBackward, 0, kmerBackward.length));
-		
-	}
-	@Test
-	public void TestGetGene(){
-		byte[] kmer = Kmer.compressKmer(9, array, 0);
-		String text = "AGCTGACCG";
-		for(int i =0; i < 9; i++){
-			Assert.assertEquals(text.charAt(i), 
-					(char)(Kmer.GENE_CODE.getSymbolFromCode(KmerUtil.getGeneCodeAtPosition(i, 9, kmer, 0, kmer.length))));
-		}
-	}
-}
diff --git a/genomix/genomix-data/src/test/java/edu/uci/ics/genomix/example/kmer/VKmerBytesWritableFactoryTest.java b/genomix/genomix-data/src/test/java/edu/uci/ics/genomix/example/kmer/VKmerBytesWritableFactoryTest.java
new file mode 100644
index 0000000..c40729c
--- /dev/null
+++ b/genomix/genomix-data/src/test/java/edu/uci/ics/genomix/example/kmer/VKmerBytesWritableFactoryTest.java
@@ -0,0 +1,158 @@
+package edu.uci.ics.genomix.example.kmer;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import edu.uci.ics.genomix.type.GeneCode;
+import edu.uci.ics.genomix.type.KmerBytesWritable;
+import edu.uci.ics.genomix.type.VKmerBytesWritable;
+import edu.uci.ics.genomix.type.VKmerBytesWritableFactory;
+
+public class VKmerBytesWritableFactoryTest {
+    static byte[] array = { 'A', 'G', 'C', 'T', 'G', 'A', 'C', 'C', 'G', 'T' };
+
+    VKmerBytesWritableFactory kmerFactory = new VKmerBytesWritableFactory(8);
+
+    @Test
+    public void TestDegree() {
+        Assert.assertTrue(GeneCode.inDegree((byte) 0xff) == 4);
+        Assert.assertTrue(GeneCode.outDegree((byte) 0xff) == 4);
+        Assert.assertTrue(GeneCode.inDegree((byte) 0x3f) == 2);
+        Assert.assertTrue(GeneCode.outDegree((byte) 0x01) == 1);
+        Assert.assertTrue(GeneCode.inDegree((byte) 0x01) == 0);
+    }
+
+    @Test
+    public void TestGetLastKmer() {
+        KmerBytesWritable kmer = new KmerBytesWritable(9);
+        kmer.setByRead(array, 0);
+        Assert.assertEquals("AGCTGACCG", kmer.toString());
+        KmerBytesWritable lastKmer;
+        for (int i = 8; i > 0; i--) {
+            lastKmer = kmerFactory.getLastKmerFromChain(i, kmer);
+            Assert.assertEquals("AGCTGACCG".substring(9 - i), lastKmer.toString());
+        }
+        VKmerBytesWritable vlastKmer;
+        for (int i = 8; i > 0; i--) {
+            vlastKmer = kmerFactory.getLastKmerFromChain(i, kmer);
+            Assert.assertEquals("AGCTGACCG".substring(9 - i), vlastKmer.toString());
+        }
+    }
+
+    @Test
+    public void TestMergeNext() {
+        KmerBytesWritable kmer = new KmerBytesWritable(9);
+        kmer.setByRead(array, 0);
+        Assert.assertEquals("AGCTGACCG", kmer.toString());
+
+        String text = "AGCTGACCG";
+        for (byte x = GeneCode.A; x <= GeneCode.T; x++) {
+            KmerBytesWritable newkmer = kmerFactory.mergeKmerWithNextCode(kmer, x);
+            text = text + (char) GeneCode.GENE_SYMBOL[x];
+            Assert.assertEquals(text, newkmer.toString());
+            kmer = new KmerBytesWritable(newkmer);
+        }
+        for (byte x = GeneCode.A; x <= GeneCode.T; x++) {
+            KmerBytesWritable newkmer = kmerFactory.mergeKmerWithNextCode(kmer, x);
+            text = text + (char) GeneCode.GENE_SYMBOL[x];
+            Assert.assertEquals(text, newkmer.toString());
+            kmer = new KmerBytesWritable(newkmer);
+        }
+    }
+
+    @Test
+    public void TestMergePre() {
+        KmerBytesWritable kmer = new KmerBytesWritable(9);
+        kmer.setByRead(array, 0);
+        Assert.assertEquals("AGCTGACCG", kmer.toString());
+        String text = "AGCTGACCG";
+        for (byte x = GeneCode.A; x <= GeneCode.T; x++) {
+            KmerBytesWritable newkmer = kmerFactory.mergeKmerWithPreCode(kmer, x);
+            text = (char) GeneCode.GENE_SYMBOL[x] + text;
+            Assert.assertEquals(text, newkmer.toString());
+            kmer = new KmerBytesWritable(newkmer);
+        }
+        for (byte x = GeneCode.A; x <= GeneCode.T; x++) {
+            KmerBytesWritable newkmer = kmerFactory.mergeKmerWithPreCode(kmer, x);
+            text = (char) GeneCode.GENE_SYMBOL[x] + text;
+            Assert.assertEquals(text, newkmer.toString());
+            kmer = new KmerBytesWritable(newkmer);
+        }
+    }
+
+    @Test
+    public void TestMergeTwoKmer() {
+        KmerBytesWritable kmer1 = new KmerBytesWritable(9);
+        kmer1.setByRead(array, 0);
+        String text1 = "AGCTGACCG";
+        KmerBytesWritable kmer2 = new KmerBytesWritable(9);
+        kmer2.setByRead(array, 1);
+        String text2 = "GCTGACCGT";
+        Assert.assertEquals(text1, kmer1.toString());
+        Assert.assertEquals(text2, kmer2.toString());
+
+        KmerBytesWritable merged = kmerFactory.mergeTwoKmer(kmer1, kmer2);
+        Assert.assertEquals(text1 + text2, merged.toString());
+
+        KmerBytesWritable kmer3 = new KmerBytesWritable(3);
+        kmer3.setByRead(array, 1);
+        String text3 = "GCT";
+        Assert.assertEquals(text3, kmer3.toString());
+
+        merged = kmerFactory.mergeTwoKmer(kmer1, kmer3);
+        Assert.assertEquals(text1 + text3, merged.toString());
+        merged = kmerFactory.mergeTwoKmer(kmer3, kmer1);
+        Assert.assertEquals(text3 + text1, merged.toString());
+
+        KmerBytesWritable kmer4 = new KmerBytesWritable(8);
+        kmer4.setByRead(array, 0);
+        String text4 = "AGCTGACC";
+        Assert.assertEquals(text4, kmer4.toString());
+        merged = kmerFactory.mergeTwoKmer(kmer4, kmer3);
+        Assert.assertEquals(text4 + text3, merged.toString());
+
+        KmerBytesWritable kmer5 = new KmerBytesWritable(7);
+        kmer5.setByRead(array, 0);
+        String text5 = "AGCTGAC";
+        VKmerBytesWritable kmer6 = new VKmerBytesWritable(9);
+        kmer6.setByRead(9, array, 1);
+        String text6 = "GCTGACCGT";
+        merged = kmerFactory.mergeTwoKmer(kmer5, kmer6);
+        Assert.assertEquals(text5 + text6, merged.toString());
+
+        kmer6.setByRead(6, array, 1);
+        String text7 = "GCTGAC";
+        merged = kmerFactory.mergeTwoKmer(kmer5, kmer6);
+        Assert.assertEquals(text5 + text7, merged.toString());
+
+        kmer6.setByRead(4, array, 1);
+        String text8 = "GCTG";
+        merged = kmerFactory.mergeTwoKmer(kmer5, kmer6);
+        Assert.assertEquals(text5 + text8, merged.toString());
+
+    }
+
+    @Test
+    public void TestShift() {
+        VKmerBytesWritable kmer = new VKmerBytesWritable(kmerFactory.getKmerByRead(9, array, 0));
+        String text = "AGCTGACCG";
+        Assert.assertEquals(text, kmer.toString());
+
+        VKmerBytesWritable kmerForward = kmerFactory.shiftKmerWithNextCode(kmer, GeneCode.A);
+        Assert.assertEquals(text, kmer.toString());
+        Assert.assertEquals("GCTGACCGA", kmerForward.toString());
+        VKmerBytesWritable kmerBackward = kmerFactory.shiftKmerWithPreCode(kmer, GeneCode.C);
+        Assert.assertEquals(text, kmer.toString());
+        Assert.assertEquals("CAGCTGACC", kmerBackward.toString());
+
+    }
+
+    @Test
+    public void TestReverseKmer() {
+        KmerBytesWritable kmer = new KmerBytesWritable(7);
+        kmer.setByRead(array, 0);
+        Assert.assertEquals(kmer.toString(), "AGCTGAC");
+        KmerBytesWritable reversed = kmerFactory.reverse(kmer);
+        Assert.assertEquals(reversed.toString(), "CAGTCGA");
+    }
+}
diff --git a/genomix/genomix-data/src/test/resources/hadoop/conf/core-site.xml b/genomix/genomix-data/src/test/resources/hadoop/conf/core-site.xml
index 47dfac5..3e5bacb 100644
--- a/genomix/genomix-data/src/test/resources/hadoop/conf/core-site.xml
+++ b/genomix/genomix-data/src/test/resources/hadoop/conf/core-site.xml
@@ -5,14 +5,14 @@
 
 <configuration>
 
-<property>
-    <name>fs.default.name</name>
-    <value>hdfs://127.0.0.1:31888</value>
-</property>
-<property>
-    <name>hadoop.tmp.dir</name>
-    <value>/tmp/hadoop</value>
-</property>
+	<property>
+		<name>fs.default.name</name>
+		<value>hdfs://127.0.0.1:31888</value>
+	</property>
+	<property>
+		<name>hadoop.tmp.dir</name>
+		<value>/tmp/hadoop</value>
+	</property>
 
 
 </configuration>
diff --git a/genomix/genomix-data/src/test/resources/hadoop/conf/hdfs-site.xml b/genomix/genomix-data/src/test/resources/hadoop/conf/hdfs-site.xml
index 8d29b1d..b1b1902 100644
--- a/genomix/genomix-data/src/test/resources/hadoop/conf/hdfs-site.xml
+++ b/genomix/genomix-data/src/test/resources/hadoop/conf/hdfs-site.xml
@@ -5,14 +5,14 @@
 
 <configuration>
 
-<property>
-   <name>dfs.replication</name>
-   <value>1</value>
-</property>
+	<property>
+		<name>dfs.replication</name>
+		<value>1</value>
+	</property>
 
-<property>
-	<name>dfs.block.size</name>
-	<value>65536</value>
-</property>
+	<property>
+		<name>dfs.block.size</name>
+		<value>65536</value>
+	</property>
 
 </configuration>
diff --git a/genomix/genomix-data/src/test/resources/hadoop/conf/mapred-site.xml b/genomix/genomix-data/src/test/resources/hadoop/conf/mapred-site.xml
index 39b6505..525e7d5 100644
--- a/genomix/genomix-data/src/test/resources/hadoop/conf/mapred-site.xml
+++ b/genomix/genomix-data/src/test/resources/hadoop/conf/mapred-site.xml
@@ -5,21 +5,21 @@
 
 <configuration>
 
-  <property>
-    <name>mapred.job.tracker</name>
-    <value>localhost:29007</value>
-  </property>
-  <property>
-     <name>mapred.tasktracker.map.tasks.maximum</name>
-     <value>20</value>
-  </property>
-   <property>
-      <name>mapred.tasktracker.reduce.tasks.maximum</name>
-      <value>20</value>
-   </property>
-   <property>
-      <name>mapred.max.split.size</name>
-      <value>2048</value>
-   </property>
+	<property>
+		<name>mapred.job.tracker</name>
+		<value>localhost:29007</value>
+	</property>
+	<property>
+		<name>mapred.tasktracker.map.tasks.maximum</name>
+		<value>20</value>
+	</property>
+	<property>
+		<name>mapred.tasktracker.reduce.tasks.maximum</name>
+		<value>20</value>
+	</property>
+	<property>
+		<name>mapred.max.split.size</name>
+		<value>2048</value>
+	</property>
 
 </configuration>
diff --git a/genomix/genomix-hadoop/pom.xml b/genomix/genomix-hadoop/pom.xml
index 195ce7f..f791f5b 100755
--- a/genomix/genomix-hadoop/pom.xml
+++ b/genomix/genomix-hadoop/pom.xml
@@ -8,7 +8,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>genomix</artifactId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 	<properties>
@@ -151,7 +151,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>genomix-data</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/gbresultschecking/ResultsCheckingMapper.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/gbresultschecking/ResultsCheckingMapper.java
index fe56e1a..dca3808 100644
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/gbresultschecking/ResultsCheckingMapper.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/gbresultschecking/ResultsCheckingMapper.java
@@ -16,7 +16,6 @@
 
 import java.io.IOException;
 import org.apache.hadoop.io.ByteWritable;
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.io.IntWritable;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.mapred.FileInputFormat;
@@ -27,13 +26,12 @@
 import org.apache.hadoop.mapred.OutputCollector;
 import org.apache.hadoop.mapred.Reporter;
 
-import edu.uci.ics.genomix.type.Kmer;
 import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.genomix.type.KmerCountValue;
 
 @SuppressWarnings({ "unused", "deprecation" })
-public class ResultsCheckingMapper extends MapReduceBase implements Mapper<BytesWritable, KmerCountValue, Text, Text> {
-    BytesWritable valWriter = new BytesWritable();
+public class ResultsCheckingMapper extends MapReduceBase implements Mapper<KmerBytesWritable, KmerCountValue, Text, Text> {
+    KmerBytesWritable valWriter;
     private final static IntWritable one = new IntWritable(1);
     public static Text textkey = new Text();
     public static Text textvalue = new Text();
@@ -42,16 +40,16 @@
 
     public void configure(JobConf job) {
         KMER_SIZE = job.getInt("sizeKmer", 0);
+        valWriter= new KmerBytesWritable(KMER_SIZE);
     }
 
     @Override
-    public void map(BytesWritable key, KmerCountValue value, OutputCollector<Text, Text> output, Reporter reporter)
+    public void map(KmerBytesWritable key, KmerCountValue value, OutputCollector<Text, Text> output, Reporter reporter)
             throws IOException {
 
         FileSplit fileSplit = (FileSplit) reporter.getInputSplit();
         String filename = fileSplit.getPath().getName();
-        byte[] bkey = key.getBytes();
-        textkey.set(Kmer.recoverKmerFrom(KMER_SIZE, key.getBytes(), 0, key.getLength()) + "\t" + value.toString());
+        textkey.set(key.toString() + "\t" + value.toString());
         textvalue.set(filename);
         output.collect(textkey, textvalue);
     }
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixCombiner.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixCombiner.java
index 5d39928..09a1bf1 100755
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixCombiner.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixCombiner.java
@@ -18,12 +18,12 @@
 import java.io.IOException;
 import java.util.Iterator;
 
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.mapred.MapReduceBase;
 import org.apache.hadoop.mapred.OutputCollector;
 import org.apache.hadoop.mapred.Reducer;
 import org.apache.hadoop.mapred.Reporter;
 
+import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.genomix.type.KmerCountValue;
 
 /**
@@ -31,12 +31,12 @@
  */
 @SuppressWarnings("deprecation")
 public class GenomixCombiner extends MapReduceBase implements
-        Reducer<BytesWritable, KmerCountValue, BytesWritable, KmerCountValue> {
-    public KmerCountValue vaWriter = new KmerCountValue();
+        Reducer<KmerBytesWritable, KmerCountValue, KmerBytesWritable, KmerCountValue> {
+    private KmerCountValue vaWriter = new KmerCountValue();
 
     @Override
-    public void reduce(BytesWritable key, Iterator<KmerCountValue> values,
-            OutputCollector<BytesWritable, KmerCountValue> output, Reporter reporter) throws IOException {
+    public void reduce(KmerBytesWritable key, Iterator<KmerCountValue> values,
+            OutputCollector<KmerBytesWritable, KmerCountValue> output, Reporter reporter) throws IOException {
         byte groupByAdjList = 0;
         int count = 0;
         byte bytCount = 0;
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixDriver.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixDriver.java
index b90ab23..e2f0f85 100755
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixDriver.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixDriver.java
@@ -19,7 +19,6 @@
 
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.mapred.FileInputFormat;
 import org.apache.hadoop.mapred.FileOutputFormat;
 import org.apache.hadoop.mapred.JobClient;
@@ -28,6 +27,8 @@
 import org.apache.hadoop.mapred.TextInputFormat;
 import org.kohsuke.args4j.CmdLineParser;
 import org.kohsuke.args4j.Option;
+
+import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.genomix.type.KmerCountValue;
 
 /**
@@ -64,12 +65,12 @@
         conf.setReducerClass(GenomixReducer.class);
         conf.setCombinerClass(GenomixCombiner.class);
 
-        conf.setMapOutputKeyClass(BytesWritable.class);
+        conf.setMapOutputKeyClass(KmerBytesWritable.class);
         conf.setMapOutputValueClass(KmerCountValue.class);
 
         conf.setInputFormat(TextInputFormat.class);
         conf.setOutputFormat(SequenceFileOutputFormat.class);
-        conf.setOutputKeyClass(BytesWritable.class);
+        conf.setOutputKeyClass(KmerBytesWritable.class);
         conf.setOutputValueClass(KmerCountValue.class);
         FileInputFormat.setInputPaths(conf, new Path(inputPath));
         FileOutputFormat.setOutputPath(conf, new Path(outputPath));
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixMapper.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixMapper.java
index cd8b7e3..d36be17 100755
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixMapper.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixMapper.java
@@ -19,7 +19,6 @@
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.io.LongWritable;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.mapred.JobConf;
@@ -28,8 +27,8 @@
 import org.apache.hadoop.mapred.OutputCollector;
 import org.apache.hadoop.mapred.Reporter;
 
-import edu.uci.ics.genomix.type.Kmer;
-import edu.uci.ics.genomix.type.Kmer.GENE_CODE;
+import edu.uci.ics.genomix.type.GeneCode;
+import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.genomix.type.KmerCountValue;
 
 /**
@@ -37,7 +36,7 @@
  */
 @SuppressWarnings("deprecation")
 public class GenomixMapper extends MapReduceBase implements
-        Mapper<LongWritable, Text, BytesWritable, KmerCountValue> {
+        Mapper<LongWritable, Text, KmerBytesWritable, KmerCountValue> {
 
     public class CurrenByte {
         public byte curByte;
@@ -45,12 +44,14 @@
     }
 
     public static int KMER_SIZE;
-    public KmerCountValue outputAdjList = new KmerCountValue();
-    public BytesWritable outputKmer = new BytesWritable();
+    public KmerCountValue outputAdjList; 
+    public KmerBytesWritable outputKmer; 
 
     @Override
     public void configure(JobConf job) {
         KMER_SIZE = Integer.parseInt(job.get("sizeKmer"));
+        outputAdjList = new KmerCountValue();
+        outputKmer = new KmerBytesWritable(KMER_SIZE);
     }
 
     /*succeed node
@@ -64,7 +65,7 @@
       G 01000000 64
       T 10000000 128*/
     @Override
-    public void map(LongWritable key, Text value, OutputCollector<BytesWritable, KmerCountValue> output,
+    public void map(LongWritable key, Text value, OutputCollector<KmerBytesWritable, KmerCountValue> output,
             Reporter reporter) throws IOException {
         /* A 00
            C 01
@@ -78,28 +79,25 @@
             /** first kmer */
             byte count = 1;
             byte[] array = geneLine.getBytes();
-            byte[] kmer = Kmer.compressKmer(KMER_SIZE, array, 0);
+            outputKmer.setByRead( array, 0);
             byte pre = 0;
-            byte next = GENE_CODE.getAdjBit(array[KMER_SIZE]);
-            byte adj = GENE_CODE.mergePreNextAdj(pre, next);
+            byte next = GeneCode.getAdjBit(array[KMER_SIZE]);
+            byte adj = GeneCode.mergePreNextAdj(pre, next);
             outputAdjList.set(adj, count);
-            outputKmer.set(kmer, 0, kmer.length);
             output.collect(outputKmer, outputAdjList);
             /** middle kmer */
             for (int i = KMER_SIZE; i < array.length - 1; i++) {
-                pre = Kmer.moveKmer(KMER_SIZE, kmer, array[i]);
-                next = GENE_CODE.getAdjBit(array[i + 1]);
-                adj = GENE_CODE.mergePreNextAdj(pre, next);
+                pre = outputKmer.shiftKmerWithNextChar(array[i]);
+                next = GeneCode.getAdjBit(array[i + 1]);
+                adj = GeneCode.mergePreNextAdj(pre, next);
                 outputAdjList.set(adj, count);
-                outputKmer.set(kmer, 0, kmer.length);
                 output.collect(outputKmer, outputAdjList);
             }
             /** last kmer */
-            pre = Kmer.moveKmer(KMER_SIZE, kmer, array[array.length - 1]);
+            pre = outputKmer.shiftKmerWithNextChar(array[array.length - 1]);
             next = 0;
-            adj = GENE_CODE.mergePreNextAdj(pre, next);
+            adj = GeneCode.mergePreNextAdj(pre, next);
             outputAdjList.set(adj, count);
-            outputKmer.set(kmer, 0, kmer.length);
             output.collect(outputKmer, outputAdjList);
         }
     }
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixReducer.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixReducer.java
index 676d6f1..1fba709 100755
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixReducer.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphbuilding/GenomixReducer.java
@@ -17,12 +17,12 @@
 import java.io.IOException;
 import java.util.Iterator;
 
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.mapred.MapReduceBase;
 import org.apache.hadoop.mapred.OutputCollector;
 import org.apache.hadoop.mapred.Reducer;
 import org.apache.hadoop.mapred.Reporter;
 
+import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.genomix.type.KmerCountValue;
 
 /**
@@ -30,12 +30,12 @@
  */
 @SuppressWarnings("deprecation")
 public class GenomixReducer extends MapReduceBase implements
-        Reducer<BytesWritable, KmerCountValue, BytesWritable, KmerCountValue> {
+        Reducer<KmerBytesWritable, KmerCountValue, KmerBytesWritable, KmerCountValue> {
     KmerCountValue valWriter = new KmerCountValue();
     static enum MyCounters { NUM_RECORDS };
     @Override
-    public void reduce(BytesWritable key, Iterator<KmerCountValue> values,
-            OutputCollector<BytesWritable, KmerCountValue> output, Reporter reporter) throws IOException {
+    public void reduce(KmerBytesWritable key, Iterator<KmerCountValue> values,
+            OutputCollector<KmerBytesWritable, KmerCountValue> output, Reporter reporter) throws IOException {
         byte groupByAdjList = 0;
         int count = 0;
         byte bytCount = 0;
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphcountfilter/CountFilterDriver.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphcountfilter/CountFilterDriver.java
index b3a6102..d54eca2 100644
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphcountfilter/CountFilterDriver.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphcountfilter/CountFilterDriver.java
@@ -18,7 +18,6 @@
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.io.ByteWritable;
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.mapred.FileInputFormat;
 import org.apache.hadoop.mapred.FileOutputFormat;
 import org.apache.hadoop.mapred.JobClient;
@@ -28,6 +27,8 @@
 import org.kohsuke.args4j.CmdLineParser;
 import org.kohsuke.args4j.Option;
 
+import edu.uci.ics.genomix.type.KmerBytesWritable;
+
 @SuppressWarnings("deprecation")
 public class CountFilterDriver {
     private static class Options {
@@ -59,13 +60,13 @@
         conf.setReducerClass(CountFilterReducer.class);
         conf.setCombinerClass(CountFilterReducer.class);
 
-        conf.setMapOutputKeyClass(BytesWritable.class);
+        conf.setMapOutputKeyClass(KmerBytesWritable.class);
         conf.setMapOutputValueClass(ByteWritable.class);
 
         conf.setInputFormat(SequenceFileInputFormat.class);
         conf.setOutputFormat(SequenceFileOutputFormat.class);
         
-        conf.setOutputKeyClass(BytesWritable.class);
+        conf.setOutputKeyClass(KmerBytesWritable.class);
         conf.setOutputValueClass(ByteWritable.class);
         
         FileInputFormat.setInputPaths(conf, new Path(inputPath));
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphcountfilter/CountFilterMapper.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphcountfilter/CountFilterMapper.java
index 80557e9..2a54217 100644
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphcountfilter/CountFilterMapper.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphcountfilter/CountFilterMapper.java
@@ -15,33 +15,32 @@
 package edu.uci.ics.graphcountfilter;
 
 import java.io.IOException;
+
 import org.apache.hadoop.io.ByteWritable;
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapred.MapReduceBase;
 import org.apache.hadoop.mapred.Mapper;
 import org.apache.hadoop.mapred.OutputCollector;
 import org.apache.hadoop.mapred.Reporter;
+
 import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.genomix.type.KmerCountValue;
 
 
-@SuppressWarnings({ "unused", "deprecation" })
+@SuppressWarnings({ "deprecation" })
 public class CountFilterMapper extends MapReduceBase implements
-        Mapper<BytesWritable, KmerCountValue, BytesWritable, ByteWritable> {
-    public static int THRESHOLD;
-    public BytesWritable outputKmer = new BytesWritable();
-    public ByteWritable outputAdjList = new ByteWritable();
+        Mapper<KmerBytesWritable, KmerCountValue, KmerBytesWritable, ByteWritable> {
+    private int THRESHOLD;
+    private ByteWritable adjByte = new ByteWritable();
     @Override
     public void configure(JobConf job) {
         THRESHOLD = Integer.parseInt(job.get("countThreshold"));
     }
-    public void map(BytesWritable key, KmerCountValue value, OutputCollector<BytesWritable, ByteWritable> output,
+    public void map(KmerBytesWritable key, KmerCountValue value, OutputCollector<KmerBytesWritable, ByteWritable> output,
             Reporter reporter) throws IOException {
         if(value.getCount() >= THRESHOLD){
-            outputKmer.set(key);
-            outputAdjList.set(value.getAdjBitMap());
-            output.collect(outputKmer, outputAdjList);
+            adjByte.set(value.getAdjBitMap());
+            output.collect(key, adjByte );
         }
     }
 }
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphcountfilter/CountFilterReducer.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphcountfilter/CountFilterReducer.java
index c692336..dd33451 100644
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphcountfilter/CountFilterReducer.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/graphcountfilter/CountFilterReducer.java
@@ -17,18 +17,19 @@
 import java.io.IOException;
 import java.util.Iterator;
 import org.apache.hadoop.io.ByteWritable;
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.mapred.MapReduceBase;
 import org.apache.hadoop.mapred.OutputCollector;
 import org.apache.hadoop.mapred.Reducer;
 import org.apache.hadoop.mapred.Reporter;
 
+import edu.uci.ics.genomix.type.KmerBytesWritable;
+
 @SuppressWarnings("deprecation")
 public class CountFilterReducer extends MapReduceBase implements
-        Reducer<BytesWritable, ByteWritable, BytesWritable, ByteWritable> {
+        Reducer<KmerBytesWritable, ByteWritable, KmerBytesWritable, ByteWritable> {
     @Override
-    public void reduce(BytesWritable key, Iterator<ByteWritable> values,
-            OutputCollector<BytesWritable, ByteWritable> output, Reporter reporter) throws IOException {
+    public void reduce(KmerBytesWritable key, Iterator<ByteWritable> values,
+            OutputCollector<KmerBytesWritable, ByteWritable> output, Reporter reporter) throws IOException {
         output.collect(key, values.next()); //Output the Pair
     }
 }
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathDriver.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathDriver.java
index 5025a7b..cfdf8d5 100644
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathDriver.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathDriver.java
@@ -17,7 +17,6 @@
 import java.io.IOException;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.mapred.FileInputFormat;
 import org.apache.hadoop.mapred.FileOutputFormat;
 import org.apache.hadoop.mapred.JobClient;
@@ -29,6 +28,8 @@
 import org.kohsuke.args4j.CmdLineParser;
 import org.kohsuke.args4j.Option;
 
+import edu.uci.ics.genomix.type.KmerBytesWritable;
+
 @SuppressWarnings("deprecation")
 public class MergePathDriver {
     
@@ -67,13 +68,13 @@
         conf.setMapperClass(SNodeInitialMapper.class); 
         conf.setReducerClass(SNodeInitialReducer.class);
         
-        conf.setMapOutputKeyClass(BytesWritable.class);
+        conf.setMapOutputKeyClass(KmerBytesWritable.class);
         conf.setMapOutputValueClass(MergePathValueWritable.class);
         
         conf.setInputFormat(SequenceFileInputFormat.class);
         conf.setOutputFormat(SequenceFileOutputFormat.class);
         
-        conf.setOutputKeyClass(BytesWritable.class);
+        conf.setOutputKeyClass(KmerBytesWritable.class);
         conf.setOutputValueClass(MergePathValueWritable.class);
         
         FileInputFormat.setInputPaths(conf, new Path(inputPath));
@@ -97,7 +98,7 @@
             conf.setMapperClass(MergePathMapper.class);
             conf.setReducerClass(MergePathReducer.class);
             
-            conf.setMapOutputKeyClass(BytesWritable.class);
+            conf.setMapOutputKeyClass(KmerBytesWritable.class);
             conf.setMapOutputValueClass(MergePathValueWritable.class);
             
             conf.setInputFormat(SequenceFileInputFormat.class);
@@ -107,14 +108,14 @@
             String complete = "complete" + iMerge;
            
             MultipleOutputs.addNamedOutput(conf, uncomplete,
-                    MergePathMultiSeqOutputFormat.class, BytesWritable.class,
+                    MergePathMultiSeqOutputFormat.class, KmerBytesWritable.class,
                     MergePathValueWritable.class);
 
             MultipleOutputs.addNamedOutput(conf, complete,
-                    MergePathMultiSeqOutputFormat.class, BytesWritable.class,
+                    MergePathMultiSeqOutputFormat.class, KmerBytesWritable.class,
                     MergePathValueWritable.class);
             
-            conf.setOutputKeyClass(BytesWritable.class);
+            conf.setOutputKeyClass(KmerBytesWritable.class);
             conf.setOutputValueClass(MergePathValueWritable.class);
             
             FileInputFormat.setInputPaths(conf, new Path(inputPath + "-step1"));
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathMapper.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathMapper.java
index 1d772b2..c3255f2 100644
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathMapper.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathMapper.java
@@ -15,31 +15,37 @@
 package edu.uci.ics.pathmerging;
 
 import java.io.IOException;
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapred.MapReduceBase;
 import org.apache.hadoop.mapred.Mapper;
 import org.apache.hadoop.mapred.OutputCollector;
 import org.apache.hadoop.mapred.Reporter;
-import edu.uci.ics.genomix.type.Kmer;
-import edu.uci.ics.genomix.type.KmerUtil;
-import edu.uci.ics.genomix.type.Kmer.GENE_CODE;
+
+import edu.uci.ics.genomix.type.GeneCode;
+import edu.uci.ics.genomix.type.KmerBytesWritable;
+import edu.uci.ics.genomix.type.VKmerBytesWritable;
+import edu.uci.ics.genomix.type.VKmerBytesWritableFactory;
 
 @SuppressWarnings("deprecation")
 public class MergePathMapper extends MapReduceBase implements
-        Mapper<BytesWritable, MergePathValueWritable, BytesWritable, MergePathValueWritable> {
-    public static int KMER_SIZE;
-    public BytesWritable outputKmer = new BytesWritable();
-    public MergePathValueWritable outputAdjList = new MergePathValueWritable();
-
+        Mapper<KmerBytesWritable, MergePathValueWritable, KmerBytesWritable, MergePathValueWritable> {
+    private int KMER_SIZE;
+    private VKmerBytesWritableFactory outputKmerFactory;
+    private MergePathValueWritable outputAdjList; 
+    private VKmerBytesWritable tmpKmer;
+    private VKmerBytesWritable outputKmer;
 
     public void configure(JobConf job) {
         KMER_SIZE = job.getInt("sizeKmer", 0);
+        outputKmerFactory = new VKmerBytesWritableFactory(KMER_SIZE);
+        outputAdjList = new MergePathValueWritable();
+        tmpKmer = new VKmerBytesWritable(KMER_SIZE);
+        outputKmer = new VKmerBytesWritable(KMER_SIZE);
     }
 
     @Override
-    public void map(BytesWritable key, MergePathValueWritable value,
-            OutputCollector<BytesWritable, MergePathValueWritable> output, Reporter reporter) throws IOException {
+    public void map(KmerBytesWritable key, MergePathValueWritable value,
+            OutputCollector<KmerBytesWritable, MergePathValueWritable> output, Reporter reporter) throws IOException {
 
         byte precursor = (byte) 0xF0;
         byte succeed = (byte) 0x0F;
@@ -49,24 +55,18 @@
         precursor = (byte) ((precursor & 0xff) >> 4);
         succeed = (byte) (succeed & adjBitMap);
 
-        byte[] kmerValue = key.getBytes();
-        int kmerLength = key.getLength();
         if (bitFlag == 1) {
-            byte succeedCode = GENE_CODE.getGeneCodeFromBitMap(succeed);
-            int originalByteNum = Kmer.getByteNumFromK(KMER_SIZE);
-            byte[] tmpKmer = KmerUtil.getLastKmerFromChain(KMER_SIZE, value.getKmerSize(), kmerValue, 0, kmerLength);
-            byte[] newKmer = KmerUtil.shiftKmerWithNextCode(KMER_SIZE, tmpKmer,0, tmpKmer.length, succeedCode);
-            outputKmer.set(newKmer, 0, originalByteNum);
+            byte succeedCode = GeneCode.getGeneCodeFromBitMap(succeed);
+            tmpKmer.set(outputKmerFactory.getLastKmerFromChain(KMER_SIZE, key));
+            outputKmer.set(outputKmerFactory.shiftKmerWithNextCode(tmpKmer, succeedCode));
 
-            int mergeByteNum = Kmer.getByteNumFromK(value.getKmerSize() - (KMER_SIZE - 1));
-            byte[] mergeKmer = KmerUtil.getFirstKmerFromChain(value.getKmerSize() - (KMER_SIZE - 1),
-                    value.getKmerSize(), kmerValue, 0, kmerLength);
-            outputAdjList.set(mergeKmer, 0, mergeByteNum, adjBitMap, bitFlag, value.getKmerSize() - (KMER_SIZE - 1));
+            KmerBytesWritable mergedKmer = outputKmerFactory.getFirstKmerFromChain(value.getKmerSize()
+                    - (KMER_SIZE - 1), value.getKmer());
+            outputAdjList.set(mergedKmer, adjBitMap, bitFlag);
             output.collect(outputKmer, outputAdjList);
         } else {
-            outputKmer.set(key);
             outputAdjList.set(value);
-            output.collect(outputKmer, outputAdjList);
+            output.collect(key, outputAdjList);
         }
     }
 }
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathReducer.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathReducer.java
index 2397a98..cead0e8 100644
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathReducer.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathReducer.java
@@ -16,7 +16,6 @@
 
 import java.io.IOException;
 import java.util.Iterator;
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapred.MapReduceBase;
 import org.apache.hadoop.mapred.OutputCollector;
@@ -24,53 +23,52 @@
 import org.apache.hadoop.mapred.Reporter;
 import org.apache.hadoop.mapred.lib.MultipleOutputs;
 
-import edu.uci.ics.genomix.type.Kmer;
-import edu.uci.ics.genomix.type.KmerUtil;
+import edu.uci.ics.genomix.type.KmerBytesWritable;
+import edu.uci.ics.genomix.type.VKmerBytesWritable;
+import edu.uci.ics.genomix.type.VKmerBytesWritableFactory;
 
 @SuppressWarnings("deprecation")
 public class MergePathReducer extends MapReduceBase implements
-        Reducer<BytesWritable, MergePathValueWritable, BytesWritable, MergePathValueWritable> {
-    public BytesWritable outputKmer = new BytesWritable();
-    public static int KMER_SIZE;
-    public MergePathValueWritable outputAdjList = new MergePathValueWritable();
+        Reducer<KmerBytesWritable, MergePathValueWritable, KmerBytesWritable, MergePathValueWritable> {
+    private VKmerBytesWritableFactory kmerFactory;
+    private VKmerBytesWritable outputKmer;
+    private VKmerBytesWritable tmpKmer;
+    private int KMER_SIZE;
+    private MergePathValueWritable outputAdjList;
     MultipleOutputs mos = null;
-    public static int I_MERGE;
+    private int I_MERGE;
 
     public void configure(JobConf job) {
         mos = new MultipleOutputs(job);
         I_MERGE = Integer.parseInt(job.get("iMerge"));
         KMER_SIZE = job.getInt("sizeKmer", 0);
+        outputAdjList = new MergePathValueWritable();
+        kmerFactory = new VKmerBytesWritableFactory(KMER_SIZE);
+        outputKmer = new VKmerBytesWritable(KMER_SIZE);
+        tmpKmer = new VKmerBytesWritable(KMER_SIZE);
     }
 
     @SuppressWarnings("unchecked")
     @Override
-    public void reduce(BytesWritable key, Iterator<MergePathValueWritable> values,
-            OutputCollector<BytesWritable, MergePathValueWritable> output, Reporter reporter) throws IOException {
+    public void reduce(KmerBytesWritable key, Iterator<MergePathValueWritable> values,
+            OutputCollector<KmerBytesWritable, MergePathValueWritable> output, Reporter reporter) throws IOException {
         outputAdjList = values.next();
 
+        
         if (values.hasNext() == true) {
 
-            byte[] keyBytes = key.getBytes();
-            int keyLength = key.getLength();
             if (outputAdjList.getFlag() == 1) {
                 byte adjBitMap = outputAdjList.getAdjBitMap();
                 byte bitFlag = outputAdjList.getFlag();
-                int kmerSize = outputAdjList.getKmerSize();
-                int mergeByteNum = Kmer.getByteNumFromK(KMER_SIZE + kmerSize);
-                byte[] valueBytes = outputAdjList.getBytes();
-                int valueLength = outputAdjList.getLength();
+                outputKmer.set(kmerFactory.mergeTwoKmer(outputAdjList.getKmer(), key));
                 
-                byte[] mergeKmer = KmerUtil.mergeTwoKmer(outputAdjList.getKmerSize(), valueBytes,0, valueLength, 
-                		KMER_SIZE, keyBytes, 0, keyLength);
-                outputKmer.set(mergeKmer, 0, mergeByteNum);
-
                 outputAdjList = values.next();
                 byte nextAdj = outputAdjList.getAdjBitMap();
                 byte succeed = (byte) 0x0F;
                 succeed = (byte) (succeed & nextAdj);
                 adjBitMap = (byte) (adjBitMap & 0xF0);
                 adjBitMap = (byte) (adjBitMap | succeed);
-                outputAdjList.set(null, 0, 0, adjBitMap, bitFlag, KMER_SIZE + kmerSize);
+                outputAdjList.set(null, 0, 0, adjBitMap, bitFlag, KMER_SIZE + outputAdjList.getKmerSize());
 
                 mos.getCollector("uncomplete" + I_MERGE, reporter).collect(outputKmer, outputAdjList);
             } else {
@@ -81,13 +79,8 @@
                 byte adjBitMap = outputAdjList.getAdjBitMap();
                 byte flag = outputAdjList.getFlag();
                 int kmerSize = outputAdjList.getKmerSize();
-                int mergeByteNum = Kmer.getByteNumFromK(KMER_SIZE + kmerSize);
-                byte[] valueBytes = outputAdjList.getBytes();
-                int valueLength =outputAdjList.getLength();
-                byte[] mergeKmer = KmerUtil.mergeTwoKmer(outputAdjList.getKmerSize(), valueBytes, 0, valueLength,
-                		KMER_SIZE, keyBytes, 0, keyLength);
-                outputKmer.set(mergeKmer, 0, mergeByteNum);
-
+                
+                outputKmer.set(kmerFactory.mergeTwoKmer(outputAdjList.getKmer(), key));
                 adjBitMap = (byte) (adjBitMap & 0xF0);
                 adjBitMap = (byte) (adjBitMap | succeed);
                 outputAdjList.set(null, 0, 0, adjBitMap, flag, KMER_SIZE + kmerSize);
@@ -95,19 +88,13 @@
                 mos.getCollector("uncomplete" + I_MERGE, reporter).collect(outputKmer, outputAdjList);
             }
         } else {
-            byte[] keyBytes = key.getBytes();
-            int keyLength = key.getLength();
             if (outputAdjList.getFlag() != 0) {
                 byte adjBitMap = outputAdjList.getAdjBitMap();
                 byte flag = outputAdjList.getFlag();
                 int kmerSize = outputAdjList.getKmerSize();
-                int mergeByteNum = Kmer.getByteNumFromK(KMER_SIZE - 1 + kmerSize);
-                byte[] tmpKmer = KmerUtil.getFirstKmerFromChain(KMER_SIZE - 1, KMER_SIZE, keyBytes,0,keyLength);
-                byte[] valueBytes = outputAdjList.getBytes();
-                int valueLength = outputAdjList.getLength();
-                byte[] mergeKmer = KmerUtil.mergeTwoKmer(outputAdjList.getKmerSize(), valueBytes,0, valueLength,
-                		KMER_SIZE - 1, tmpKmer,0,tmpKmer.length);
-                outputKmer.set(mergeKmer, 0, mergeByteNum);
+                
+                tmpKmer.set(kmerFactory.getFirstKmerFromChain(KMER_SIZE - 1, key));
+                outputKmer.set(kmerFactory.mergeTwoKmer(outputAdjList.getKmer(), tmpKmer));
                 outputAdjList.set(null, 0, 0, adjBitMap, flag, KMER_SIZE + kmerSize);
                 mos.getCollector("complete" + I_MERGE, reporter).collect(outputKmer, outputAdjList);
             } else
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathValueWritable.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathValueWritable.java
index f1dee39..c5ff116 100644
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathValueWritable.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/MergePathValueWritable.java
@@ -14,13 +14,16 @@
  */
 package edu.uci.ics.pathmerging;
 
-import java.io.IOException;
 import java.io.DataInput;
 import java.io.DataOutput;
+import java.io.IOException;
+
 import org.apache.hadoop.io.BinaryComparable;
 import org.apache.hadoop.io.WritableComparable;
 
-import edu.uci.ics.genomix.type.Kmer;
+import edu.uci.ics.genomix.type.GeneCode;
+import edu.uci.ics.genomix.type.KmerBytesWritable;
+import edu.uci.ics.genomix.type.VKmerBytesWritable;
 
 public class MergePathValueWritable extends BinaryComparable implements WritableComparable<BinaryComparable> {
 
@@ -31,6 +34,8 @@
     private byte adjBitMap;
     private byte flag;
     private int kmerSize;
+    
+    private VKmerBytesWritable kmer;
 
     public MergePathValueWritable() {
         this((byte) 0, (byte) 0, (byte) 0, EMPTY_BYTES);
@@ -43,6 +48,8 @@
 
         this.bytes = bytes;
         this.size = bytes.length;
+        this.kmer = new VKmerBytesWritable(kmerSize);
+        kmer.set(bytes, 0, bytes.length);
     }
 
     public void setSize(int size) {
@@ -72,17 +79,29 @@
     public void set(MergePathValueWritable newData) {
         set(newData.bytes, 0, newData.size, newData.adjBitMap, newData.flag, newData.kmerSize);
     }
+    
+    public void set(KmerBytesWritable mergedKmer, byte adjBitMap, byte bitFlag) {
+        set(mergedKmer.getBytes(),0,mergedKmer.getLength(), adjBitMap, bitFlag, mergedKmer.getKmerLength());
+    }
 
     public void set(byte[] newData, int offset, int length, byte adjBitMap, byte flag, int kmerSize) {
         setSize(0);        
         if (length != 0) {
             setSize(length);
             System.arraycopy(newData, offset, bytes, 0, size);
+            kmer.set(kmerSize, newData, offset, length);
         }
             this.adjBitMap = adjBitMap;
             this.flag = flag;
             this.kmerSize = kmerSize;
     }
+    
+    public KmerBytesWritable getKmer(){
+        if (size != 0){
+            return kmer;
+        }
+        return null;
+    }
 
     @Override
     public void readFields(DataInput arg0) throws IOException {
@@ -91,6 +110,7 @@
         setSize(arg0.readInt());
         if(size != 0){
         arg0.readFully(bytes, 0, size);
+        kmer.set(bytes,0,size);
         }
         adjBitMap = arg0.readByte();
         flag = arg0.readByte();
@@ -145,6 +165,8 @@
             }
             sb.append(num);
         }
-        return Kmer.GENE_CODE.getSymbolFromBitMap(adjBitMap) + '\t' + String.valueOf(flag) + '\t' + sb.toString();
+        return GeneCode.getSymbolFromBitMap(adjBitMap) + '\t' + String.valueOf(flag) + '\t' + sb.toString();
     }
+
+ 
 }
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/SNodeInitialMapper.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/SNodeInitialMapper.java
index 2e25c0d..ae824e7 100644
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/SNodeInitialMapper.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/SNodeInitialMapper.java
@@ -15,25 +15,28 @@
 package edu.uci.ics.pathmerging;
 
 import java.io.IOException;
+
 import org.apache.hadoop.io.ByteWritable;
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapred.MapReduceBase;
 import org.apache.hadoop.mapred.Mapper;
 import org.apache.hadoop.mapred.OutputCollector;
 import org.apache.hadoop.mapred.Reporter;
-import edu.uci.ics.genomix.type.KmerUtil;
+
+import edu.uci.ics.genomix.type.KmerBytesWritable;
 
 @SuppressWarnings("deprecation")
 public class SNodeInitialMapper extends MapReduceBase implements
-        Mapper<BytesWritable, ByteWritable, BytesWritable, MergePathValueWritable> {
+        Mapper<KmerBytesWritable, ByteWritable, KmerBytesWritable, MergePathValueWritable> {
 
-    public static int KMER_SIZE;
-    public BytesWritable outputKmer = new BytesWritable();
-    public MergePathValueWritable outputAdjList = new MergePathValueWritable();
+    public int KMER_SIZE;
+    public KmerBytesWritable outputKmer;
+    public MergePathValueWritable outputAdjList;
 
     public void configure(JobConf job) {
         KMER_SIZE = Integer.parseInt(job.get("sizeKmer"));
+        outputKmer = new KmerBytesWritable(KMER_SIZE);
+        outputAdjList = new MergePathValueWritable();
     }
 
     boolean measureDegree(byte adjacent) {
@@ -92,8 +95,8 @@
     }
 
     @Override
-    public void map(BytesWritable key, ByteWritable value,
-            OutputCollector<BytesWritable, MergePathValueWritable> output, Reporter reporter) throws IOException {
+    public void map(KmerBytesWritable key, ByteWritable value,
+            OutputCollector<KmerBytesWritable, MergePathValueWritable> output, Reporter reporter) throws IOException {
 
         byte precursor = (byte) 0xF0;
         byte succeed = (byte) 0x0F;
@@ -105,8 +108,6 @@
         boolean inDegree = measureDegree(precursor);
         boolean outDegree = measureDegree(succeed);
         byte initial = 0;
-        byte[] kmerValue = key.getBytes();
-        int kmerLength = key.getLength();
         if (inDegree == true && outDegree == false) {
             flag = (byte) 2;
             switch (succeed) {
@@ -123,8 +124,8 @@
                     initial = (byte) 0x03;
                     break;
             }
-            byte[] newKmer = KmerUtil.shiftKmerWithNextCode(KMER_SIZE, kmerValue,0, kmerLength, initial);
-            outputKmer.set(newKmer, 0, kmerValue.length);
+            outputKmer.set(key);
+            outputKmer.shiftKmerWithNextCode(initial);
             adjBitMap = (byte) (adjBitMap & 0xF0);
             outputAdjList.set(null, 0, 0, adjBitMap, flag, KMER_SIZE);
             output.collect(outputKmer, outputAdjList);
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/SNodeInitialReducer.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/SNodeInitialReducer.java
index 44a0af2..734abd6 100644
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/SNodeInitialReducer.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/pathmerging/SNodeInitialReducer.java
@@ -16,31 +16,31 @@
 
 import java.io.IOException;
 import java.util.Iterator;
-import org.apache.hadoop.io.BytesWritable;
+
 import org.apache.hadoop.mapred.MapReduceBase;
 import org.apache.hadoop.mapred.OutputCollector;
 import org.apache.hadoop.mapred.Reducer;
 import org.apache.hadoop.mapred.Reporter;
 
+import edu.uci.ics.genomix.type.KmerBytesWritable;
+
 @SuppressWarnings("deprecation")
 public class SNodeInitialReducer extends MapReduceBase implements
-        Reducer<BytesWritable, MergePathValueWritable, BytesWritable, MergePathValueWritable> {
-    public BytesWritable outputKmer = new BytesWritable();
-    public MergePathValueWritable outputAdjList = new MergePathValueWritable();
+        Reducer<KmerBytesWritable, MergePathValueWritable, KmerBytesWritable, MergePathValueWritable> {
+    private MergePathValueWritable outputAdjList = new MergePathValueWritable();
 
     @Override
-    public void reduce(BytesWritable key, Iterator<MergePathValueWritable> values,
-            OutputCollector<BytesWritable, MergePathValueWritable> output, Reporter reporter) throws IOException {
+    public void reduce(KmerBytesWritable key, Iterator<MergePathValueWritable> values,
+            OutputCollector<KmerBytesWritable, MergePathValueWritable> output, Reporter reporter) throws IOException {
         outputAdjList = values.next();
-        outputKmer.set(key);
         if (values.hasNext() == true) {
             if (outputAdjList.getFlag() != 2) {
                 byte adjBitMap = outputAdjList.getAdjBitMap();
                 int kmerSize = outputAdjList.getKmerSize();
                 byte bitFlag = 1;
                 outputAdjList.set(null, 0, 0, adjBitMap, bitFlag, kmerSize);
-                output.collect(outputKmer, outputAdjList);
-                
+                output.collect(key, outputAdjList);
+
             } else {
                 boolean flag = false;
                 while (values.hasNext()) {
@@ -55,12 +55,11 @@
                     int kmerSize = outputAdjList.getKmerSize();
                     byte bitFlag = 1;
                     outputAdjList.set(null, 0, 0, adjBitMap, bitFlag, kmerSize);
-                    output.collect(outputKmer, outputAdjList);
+                    output.collect(key, outputAdjList);
                 }
             }
-        }
-        else {
-            output.collect(outputKmer, outputAdjList);
+        } else {
+            output.collect(key, outputAdjList);
         }
     }
 }
diff --git a/genomix/genomix-hadoop/src/test/java/edu/uci/ics/graphbuilding/GraphBuildingTest.java b/genomix/genomix-hadoop/src/test/java/edu/uci/ics/graphbuilding/GraphBuildingTest.java
index 6bd3bd5..7b0005b 100755
--- a/genomix/genomix-hadoop/src/test/java/edu/uci/ics/graphbuilding/GraphBuildingTest.java
+++ b/genomix/genomix-hadoop/src/test/java/edu/uci/ics/graphbuilding/GraphBuildingTest.java
@@ -26,14 +26,13 @@
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.io.SequenceFile;
 import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapred.MiniMRCluster;
 import org.apache.hadoop.util.ReflectionUtils;
 import org.junit.Test;
 
-import edu.uci.ics.genomix.type.Kmer;
+import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.genomix.type.KmerCountValue;
 import edu.uci.ics.utils.TestUtils;
 /**
@@ -72,13 +71,13 @@
         SequenceFile.Reader reader = null;
         Path path = new Path(RESULT_PATH + "/part-00000");
         reader = new SequenceFile.Reader(dfs, path, conf); 
-        BytesWritable key = (BytesWritable) ReflectionUtils.newInstance(reader.getKeyClass(), conf);
+        KmerBytesWritable key = (KmerBytesWritable) ReflectionUtils.newInstance(reader.getKeyClass(), conf);
         KmerCountValue value = (KmerCountValue) ReflectionUtils.newInstance(reader.getValueClass(), conf);
         File filePathTo = new File(TEST_SOURCE_DIR);
         BufferedWriter bw = new BufferedWriter(new FileWriter(filePathTo));
         
         while (reader.next(key, value)) {
-            bw.write(Kmer.recoverKmerFrom(SIZE_KMER, key.getBytes(), 0, key.getLength()) + "\t" + value.toString());
+            bw.write(key.toString() + "\t" + value.toString());
             bw.newLine();
         }
         bw.close();
diff --git a/genomix/genomix-hadoop/src/test/java/edu/uci/ics/graphcountfilter/CountFilterTest.java b/genomix/genomix-hadoop/src/test/java/edu/uci/ics/graphcountfilter/CountFilterTest.java
index 4bf0be7..c09937c 100644
--- a/genomix/genomix-hadoop/src/test/java/edu/uci/ics/graphcountfilter/CountFilterTest.java
+++ b/genomix/genomix-hadoop/src/test/java/edu/uci/ics/graphcountfilter/CountFilterTest.java
@@ -13,13 +13,12 @@
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.io.ByteWritable;
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.io.SequenceFile;
 import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapred.MiniMRCluster;
 import org.apache.hadoop.util.ReflectionUtils;
 import org.junit.Test;
-import edu.uci.ics.genomix.type.Kmer;
+import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.utils.TestUtils;
 
 
@@ -54,12 +53,12 @@
         SequenceFile.Reader reader = null;
         Path path = new Path(RESULT_PATH + "/part-00000");
         reader = new SequenceFile.Reader(dfs, path, conf);
-        BytesWritable key = (BytesWritable) ReflectionUtils.newInstance(reader.getKeyClass(), conf);
+        KmerBytesWritable key = (KmerBytesWritable) ReflectionUtils.newInstance(reader.getKeyClass(), conf);
         ByteWritable value = (ByteWritable) ReflectionUtils.newInstance(reader.getValueClass(), conf);
         File filePathTo = new File(TEST_SOURCE_DIR);
         BufferedWriter bw = new BufferedWriter(new FileWriter(filePathTo));
         while (reader.next(key, value)) {
-            bw.write(Kmer.recoverKmerFrom(SIZE_KMER, key.getBytes(), 0, key.getLength()) + "\t" + value.toString());
+            bw.write(key.toString() + "\t" + value.toString());
             bw.newLine();
         }
         bw.close();
diff --git a/genomix/genomix-hadoop/src/test/java/edu/uci/ics/pathmerging/MergePathTest.java b/genomix/genomix-hadoop/src/test/java/edu/uci/ics/pathmerging/MergePathTest.java
index 7b8d285..95a9785 100644
--- a/genomix/genomix-hadoop/src/test/java/edu/uci/ics/pathmerging/MergePathTest.java
+++ b/genomix/genomix-hadoop/src/test/java/edu/uci/ics/pathmerging/MergePathTest.java
@@ -11,12 +11,13 @@
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.io.SequenceFile;
 import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapred.MiniMRCluster;
 import org.apache.hadoop.util.ReflectionUtils;
 import org.junit.Test;
+
+import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.utils.TestUtils;
 
 @SuppressWarnings("deprecation")
@@ -52,7 +53,7 @@
         SequenceFile.Reader reader = null;
         Path path = new Path(HDFA_PATH_DATA + "/complete2" + "/complete2-r-00000");
         reader = new SequenceFile.Reader(dfs, path, conf);
-        BytesWritable key = (BytesWritable) ReflectionUtils.newInstance(reader.getKeyClass(), conf);
+        KmerBytesWritable key = (KmerBytesWritable) ReflectionUtils.newInstance(reader.getKeyClass(), conf);
         MergePathValueWritable value = (MergePathValueWritable) ReflectionUtils.newInstance(reader.getValueClass(), conf);
         File filePathTo = new File(TEST_SOURCE_DIR);
         BufferedWriter bw = new BufferedWriter(new FileWriter(filePathTo));
diff --git a/genomix/genomix-hyracks/pom.xml b/genomix/genomix-hyracks/pom.xml
index 6d13bc9..b246a0e 100644
--- a/genomix/genomix-hyracks/pom.xml
+++ b/genomix/genomix-hyracks/pom.xml
@@ -8,7 +8,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>genomix</artifactId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 	<properties>
@@ -38,7 +38,15 @@
 									<mainClass>edu.uci.ics.genomix.driver.Driver</mainClass>
 									<name>genomix</name>
 								</program>
-							</programs>
+                                <program>
+                                     <mainClass>edu.uci.ics.hyracks.control.cc.CCDriver</mainClass>
+                                     <name>genomixcc</name>
+                                </program>
+                                <program>
+                                     <mainClass>edu.uci.ics.hyracks.control.nc.NCDriver</mainClass>
+                                     <name>genomixnc</name>
+                                </program>
+                            </programs>
 							<repositoryLayout>flat</repositoryLayout>
 							<repositoryName>lib</repositoryName>
 						</configuration>
@@ -167,40 +175,40 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -214,13 +222,13 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks.examples</groupId>
 			<artifactId>hyracks-integration-tests</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-ipc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -237,19 +245,19 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-hdfs-core</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-hdfs-core</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>test-jar</type>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>genomix-data</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/ByteSerializerDeserializer.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/ByteSerializerDeserializer.java
index 98159c0..41e3e4b 100644
--- a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/ByteSerializerDeserializer.java
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/ByteSerializerDeserializer.java
@@ -7,41 +7,39 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 
-public class ByteSerializerDeserializer implements
-		ISerializerDeserializer<Byte> {
+public class ByteSerializerDeserializer implements ISerializerDeserializer<Byte> {
 
-	private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 1L;
 
-	public static final ByteSerializerDeserializer INSTANCE = new ByteSerializerDeserializer();
+    public static final ByteSerializerDeserializer INSTANCE = new ByteSerializerDeserializer();
 
-	private ByteSerializerDeserializer() {
-	}
+    private ByteSerializerDeserializer() {
+    }
 
-	@Override
-	public Byte deserialize(DataInput in) throws HyracksDataException {
-		try {
-			return in.readByte();
-		} catch (IOException e) {
-			throw new HyracksDataException(e);
-		}
-	}
+    @Override
+    public Byte deserialize(DataInput in) throws HyracksDataException {
+        try {
+            return in.readByte();
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+    }
 
-	@Override
-	public void serialize(Byte instance, DataOutput out)
-			throws HyracksDataException {
-		try {
-			out.writeByte(instance.intValue());
-		} catch (IOException e) {
-			throw new HyracksDataException(e);
-		}
-	}
+    @Override
+    public void serialize(Byte instance, DataOutput out) throws HyracksDataException {
+        try {
+            out.writeByte(instance.intValue());
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+    }
 
-	public static byte getByte(byte[] bytes, int offset) {
-		return bytes[offset];
-	}
+    public static byte getByte(byte[] bytes, int offset) {
+        return bytes[offset];
+    }
 
-	public static void putByte(byte val, byte[] bytes, int offset) {
-		bytes[offset] = val;
-	}
+    public static void putByte(byte val, byte[] bytes, int offset) {
+        bytes[offset] = val;
+    }
 
 }
\ No newline at end of file
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/KmerBinaryHashFunctionFamily.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/KmerBinaryHashFunctionFamily.java
index e7aa481..c1e9804 100644
--- a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/KmerBinaryHashFunctionFamily.java
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/KmerBinaryHashFunctionFamily.java
@@ -5,25 +5,25 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFamily;
 
 public class KmerBinaryHashFunctionFamily implements IBinaryHashFunctionFamily {
-	private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 1L;
 
-	@Override
-	public IBinaryHashFunction createBinaryHashFunction(final int seed) {
+    @Override
+    public IBinaryHashFunction createBinaryHashFunction(final int seed) {
 
-		return new IBinaryHashFunction() {
-			private KmerPointable p = new KmerPointable();
-			
-			@Override
-			public int hash(byte[] bytes, int offset, int length) {
-				if (length + offset >= bytes.length)
-					throw new IllegalStateException("out of bound");
-				p.set(bytes, offset, length);
-				int hash = p.hash() * (seed + 1);
-				if (hash < 0) {
-					hash = -(hash+1);
-				}
-				return hash;
-			}
-		};
-	}
+        return new IBinaryHashFunction() {
+            private KmerPointable p = new KmerPointable();
+
+            @Override
+            public int hash(byte[] bytes, int offset, int length) {
+                if (length + offset >= bytes.length)
+                    throw new IllegalStateException("out of bound");
+                p.set(bytes, offset, length);
+                int hash = p.hash() * (seed + 1);
+                if (hash < 0) {
+                    hash = -(hash + 1);
+                }
+                return hash;
+            }
+        };
+    }
 }
\ No newline at end of file
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/KmerHashPartitioncomputerFactory.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/KmerHashPartitioncomputerFactory.java
index 231470a..86ca296 100644
--- a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/KmerHashPartitioncomputerFactory.java
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/KmerHashPartitioncomputerFactory.java
@@ -6,39 +6,36 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ITuplePartitionComputer;
 import edu.uci.ics.hyracks.api.dataflow.value.ITuplePartitionComputerFactory;
 
-public class KmerHashPartitioncomputerFactory implements
-		ITuplePartitionComputerFactory {
+public class KmerHashPartitioncomputerFactory implements ITuplePartitionComputerFactory {
 
-	private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 1L;
 
-	public static int hashBytes(byte[] bytes, int offset, int length) {
-		int hash = 1;
-		for (int i = offset; i < offset + length; i++)
-			hash = (31 * hash) + (int) bytes[i];
-		return hash;
-	}
+    public static int hashBytes(byte[] bytes, int offset, int length) {
+        int hash = 1;
+        for (int i = offset; i < offset + length; i++)
+            hash = (31 * hash) + (int) bytes[i];
+        return hash;
+    }
 
-	@Override
-	public ITuplePartitionComputer createPartitioner() {
-		return new ITuplePartitionComputer() {
-			@Override
-			public int partition(IFrameTupleAccessor accessor, int tIndex,
-					int nParts) {
-				int startOffset = accessor.getTupleStartOffset(tIndex);
-				int fieldOffset = accessor.getFieldStartOffset(tIndex, 0);
-				int slotLength = accessor.getFieldSlotsLength();
-				int fieldLength = accessor.getFieldLength(tIndex, 0);
+    @Override
+    public ITuplePartitionComputer createPartitioner() {
+        return new ITuplePartitionComputer() {
+            @Override
+            public int partition(IFrameTupleAccessor accessor, int tIndex, int nParts) {
+                int startOffset = accessor.getTupleStartOffset(tIndex);
+                int fieldOffset = accessor.getFieldStartOffset(tIndex, 0);
+                int slotLength = accessor.getFieldSlotsLength();
+                int fieldLength = accessor.getFieldLength(tIndex, 0);
 
-				ByteBuffer buf = accessor.getBuffer();
+                ByteBuffer buf = accessor.getBuffer();
 
-				int hash = hashBytes(buf.array(), startOffset + fieldOffset
-						+ slotLength, fieldLength);
-				if (hash < 0){
-					hash = -(hash+1);
-				}
+                int hash = hashBytes(buf.array(), startOffset + fieldOffset + slotLength, fieldLength);
+                if (hash < 0) {
+                    hash = -(hash + 1);
+                }
 
-				return hash % nParts;
-			}
-		};
-	}
+                return hash % nParts;
+            }
+        };
+    }
 }
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/KmerNormarlizedComputerFactory.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/KmerNormarlizedComputerFactory.java
index 1ca90c2..d1d0054 100644
--- a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/KmerNormarlizedComputerFactory.java
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/accessors/KmerNormarlizedComputerFactory.java
@@ -4,20 +4,19 @@
 import edu.uci.ics.hyracks.api.dataflow.value.INormalizedKeyComputer;
 import edu.uci.ics.hyracks.api.dataflow.value.INormalizedKeyComputerFactory;
 
-public class KmerNormarlizedComputerFactory implements
-		INormalizedKeyComputerFactory {
-	private static final long serialVersionUID = 8735044913496854551L;
+public class KmerNormarlizedComputerFactory implements INormalizedKeyComputerFactory {
+    private static final long serialVersionUID = 1L;
 
-	@Override
-	public INormalizedKeyComputer createNormalizedKeyComputer() {
-		return new INormalizedKeyComputer() {
-			/**
-			 * read one int from Kmer, make sure this int is consistent whith Kmer compartor 
-			 */
-			@Override
-			public int normalize(byte[] bytes, int start, int length) {
-				return KmerPointable.getIntReverse(bytes, start, length);
-			}
-		};
-	}
+    @Override
+    public INormalizedKeyComputer createNormalizedKeyComputer() {
+        return new INormalizedKeyComputer() {
+            /**
+             * read one int from Kmer, make sure this int is consistent whith Kmer compartor
+             */
+            @Override
+            public int normalize(byte[] bytes, int start, int length) {
+                return KmerPointable.getIntReverse(bytes, start, length);
+            }
+        };
+    }
 }
\ No newline at end of file
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/primitive/KmerPointable.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/primitive/KmerPointable.java
index ae07355..b4aa4c7 100644
--- a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/primitive/KmerPointable.java
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/data/std/primitive/KmerPointable.java
@@ -9,130 +9,122 @@
 import edu.uci.ics.hyracks.data.std.api.IPointable;
 import edu.uci.ics.hyracks.data.std.api.IPointableFactory;
 
-public final class KmerPointable extends AbstractPointable implements
-		IHashable, IComparable, INumeric {
-	public static final ITypeTraits TYPE_TRAITS = new ITypeTraits() {
-		private static final long serialVersionUID = 1L;
+public final class KmerPointable extends AbstractPointable implements IHashable, IComparable, INumeric {
+    public static final ITypeTraits TYPE_TRAITS = new ITypeTraits() {
+        private static final long serialVersionUID = 1L;
 
-		@Override
-		public boolean isFixedLength() {
-			return false;
-		}
+        @Override
+        public boolean isFixedLength() {
+            return false;
+        }
 
-		@Override
-		public int getFixedLength() {
-			return -1;
-		}
-	};
+        @Override
+        public int getFixedLength() {
+            return -1;
+        }
+    };
 
-	public static final IPointableFactory FACTORY = new IPointableFactory() {
-		private static final long serialVersionUID = 1L;
+    public static final IPointableFactory FACTORY = new IPointableFactory() {
+        private static final long serialVersionUID = 1L;
 
-		@Override
-		public IPointable createPointable() {
-			return new KmerPointable();
-		}
+        @Override
+        public IPointable createPointable() {
+            return new KmerPointable();
+        }
 
-		@Override
-		public ITypeTraits getTypeTraits() {
-			return TYPE_TRAITS;
-		}
-	};
+        @Override
+        public ITypeTraits getTypeTraits() {
+            return TYPE_TRAITS;
+        }
+    };
 
-	public static short getShortReverse(byte[] bytes, int offset, int length) {
-		if (length < 2) {
-			return (short) (bytes[offset] & 0xff);
-		}
-		return (short) (((bytes[offset + length - 1] & 0xff) << 8) + (bytes[offset
-				+ length - 2] & 0xff));
-	}
+    public static short getShortReverse(byte[] bytes, int offset, int length) {
+        if (length < 2) {
+            return (short) (bytes[offset] & 0xff);
+        }
+        return (short) (((bytes[offset + length - 1] & 0xff) << 8) + (bytes[offset + length - 2] & 0xff));
+    }
 
-	public static int getIntReverse(byte[] bytes, int offset, int length) {
-		int shortValue = getShortReverse(bytes, offset, length) & 0xffff;
+    public static int getIntReverse(byte[] bytes, int offset, int length) {
+        int shortValue = getShortReverse(bytes, offset, length) & 0xffff;
 
-		if (length < 3) {
-			return shortValue;
-		}
-		if (length == 3) {
-			return (((bytes[offset + 2] & 0xff) << 16)
-					+ ((bytes[offset + 1] & 0xff) << 8) + ((bytes[offset] & 0xff)));
-		}
-		return ((bytes[offset + length - 1] & 0xff) << 24)
-				+ ((bytes[offset + length - 2] & 0xff) << 16)
-				+ ((bytes[offset + length - 3] & 0xff) << 8)
-				+ ((bytes[offset + length - 4] & 0xff) << 0);
-	}
+        if (length < 3) {
+            return shortValue;
+        }
+        if (length == 3) {
+            return (((bytes[offset + 2] & 0xff) << 16) + ((bytes[offset + 1] & 0xff) << 8) + ((bytes[offset] & 0xff)));
+        }
+        return ((bytes[offset + length - 1] & 0xff) << 24) + ((bytes[offset + length - 2] & 0xff) << 16)
+                + ((bytes[offset + length - 3] & 0xff) << 8) + ((bytes[offset + length - 4] & 0xff) << 0);
+    }
 
-	public static long getLongReverse(byte[] bytes, int offset, int length) {
-		if (length < 8) {
-			return ((long) getIntReverse(bytes, offset, length)) & 0x0ffffffffL;
-		}
-		return (((long) (bytes[offset + length - 1] & 0xff)) << 56)
-				+ (((long) (bytes[offset + length - 2] & 0xff)) << 48)
-				+ (((long) (bytes[offset + length - 3] & 0xff)) << 40)
-				+ (((long) (bytes[offset + length - 4] & 0xff)) << 32)
-				+ (((long) (bytes[offset + length - 5] & 0xff)) << 24)
-				+ (((long) (bytes[offset + length - 6] & 0xff)) << 16)
-				+ (((long) (bytes[offset + length - 7] & 0xff)) << 8)
-				+ (((long) (bytes[offset + length - 8] & 0xff)));
-	}
+    public static long getLongReverse(byte[] bytes, int offset, int length) {
+        if (length < 8) {
+            return ((long) getIntReverse(bytes, offset, length)) & 0x0ffffffffL;
+        }
+        return (((long) (bytes[offset + length - 1] & 0xff)) << 56)
+                + (((long) (bytes[offset + length - 2] & 0xff)) << 48)
+                + (((long) (bytes[offset + length - 3] & 0xff)) << 40)
+                + (((long) (bytes[offset + length - 4] & 0xff)) << 32)
+                + (((long) (bytes[offset + length - 5] & 0xff)) << 24)
+                + (((long) (bytes[offset + length - 6] & 0xff)) << 16)
+                + (((long) (bytes[offset + length - 7] & 0xff)) << 8) + (((long) (bytes[offset + length - 8] & 0xff)));
+    }
 
-	@Override
-	public int compareTo(IPointable pointer) {
-		return compareTo(pointer.getByteArray(), pointer.getStartOffset(),
-				pointer.getLength());
-	}
+    @Override
+    public int compareTo(IPointable pointer) {
+        return compareTo(pointer.getByteArray(), pointer.getStartOffset(), pointer.getLength());
+    }
 
-	@Override
-	public int compareTo(byte[] bytes, int offset, int length) {
+    @Override
+    public int compareTo(byte[] bytes, int offset, int length) {
 
-		if (this.length != length) {
-			return this.length - length;
-		}
-		for (int i = length - 1; i >= 0; i--) {
-			int cmp = (this.bytes[this.start + i] & 0xff) - (bytes[offset + i] & 0xff);
-			if (cmp !=0){
-				return cmp;
-			}
-		}
+        if (this.length != length) {
+            return this.length - length;
+        }
+        for (int i = length - 1; i >= 0; i--) {
+            int cmp = (this.bytes[this.start + i] & 0xff) - (bytes[offset + i] & 0xff);
+            if (cmp != 0) {
+                return cmp;
+            }
+        }
 
-		return 0;
-	}
+        return 0;
+    }
 
-	@Override
-	public int hash() {
-		int hash = KmerHashPartitioncomputerFactory.hashBytes(bytes, start,
-				length);
-		return hash;
-	}
+    @Override
+    public int hash() {
+        int hash = KmerHashPartitioncomputerFactory.hashBytes(bytes, start, length);
+        return hash;
+    }
 
-	@Override
-	public byte byteValue() {
-		return bytes[start + length - 1];
-	}
+    @Override
+    public byte byteValue() {
+        return bytes[start + length - 1];
+    }
 
-	@Override
-	public short shortValue() {
-		return getShortReverse(bytes, start, length);
-	}
+    @Override
+    public short shortValue() {
+        return getShortReverse(bytes, start, length);
+    }
 
-	@Override
-	public int intValue() {
-		return getIntReverse(bytes, start, length);
-	}
+    @Override
+    public int intValue() {
+        return getIntReverse(bytes, start, length);
+    }
 
-	@Override
-	public long longValue() {
-		return getLongReverse(bytes, start, length);
-	}
+    @Override
+    public long longValue() {
+        return getLongReverse(bytes, start, length);
+    }
 
-	@Override
-	public float floatValue() {
-		return Float.intBitsToFloat(intValue());
-	}
+    @Override
+    public float floatValue() {
+        return Float.intBitsToFloat(intValue());
+    }
 
-	@Override
-	public double doubleValue() {
-		return Double.longBitsToDouble(longValue());
-	}
+    @Override
+    public double doubleValue() {
+        return Double.longBitsToDouble(longValue());
+    }
 }
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/dataflow/KMerSequenceWriterFactory.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/dataflow/KMerSequenceWriterFactory.java
index 8c3f277..413c73b 100644
--- a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/dataflow/KMerSequenceWriterFactory.java
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/dataflow/KMerSequenceWriterFactory.java
@@ -4,12 +4,13 @@
 import java.io.IOException;
 
 import org.apache.hadoop.fs.FSDataOutputStream;
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.io.SequenceFile;
 import org.apache.hadoop.io.SequenceFile.CompressionType;
 import org.apache.hadoop.io.SequenceFile.Writer;
 import org.apache.hadoop.mapred.JobConf;
 
+import edu.uci.ics.genomix.job.GenomixJob;
+import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.genomix.type.KmerCountValue;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
@@ -23,9 +24,11 @@
 
 	private static final long serialVersionUID = 1L;
 	private ConfFactory confFactory;
+	private final int kmerlength;
 
 	public KMerSequenceWriterFactory(JobConf conf) throws HyracksDataException {
 		this.confFactory = new ConfFactory(conf);
+		this.kmerlength = conf.getInt(GenomixJob.KMER_LENGTH, GenomixJob.DEFAULT_KMER);
 	}
 
 	public class TupleWriter implements ITupleWriter {
@@ -37,7 +40,7 @@
 		Writer writer = null;
 
 		KmerCountValue reEnterCount = new KmerCountValue();
-		BytesWritable reEnterKey = new BytesWritable();
+		KmerBytesWritable reEnterKey = new KmerBytesWritable(kmerlength);
 
 		/**
 		 * assumption is that output never change source!
@@ -55,8 +58,6 @@
 				reEnterCount.set(bitmap, count);
 				reEnterKey.set(kmer, keyStart, keyLength);
 				writer.append(reEnterKey, reEnterCount);
-				// @mark: this method can not used for read in hadoop 0.20.2.
-				// writer.appendRaw(kmer, keyStart, keyLength, reEnterCount);
 			} catch (IOException e) {
 				throw new HyracksDataException(e);
 			}
@@ -66,7 +67,7 @@
 		public void open(DataOutput output) throws HyracksDataException {
 			try {
 				writer = SequenceFile.createWriter(cf.getConf(),
-						(FSDataOutputStream) output, BytesWritable.class,
+						(FSDataOutputStream) output, KmerBytesWritable.class,
 						KmerCountValue.class, CompressionType.NONE, null);
 			} catch (IOException e) {
 				throw new HyracksDataException(e);
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/dataflow/KMerTextWriterFactory.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/dataflow/KMerTextWriterFactory.java
index 0975fd2..4ba38d0 100644
--- a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/dataflow/KMerTextWriterFactory.java
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/dataflow/KMerTextWriterFactory.java
@@ -3,7 +3,8 @@
 import java.io.DataOutput;
 import java.io.IOException;
 
-import edu.uci.ics.genomix.type.Kmer;
+import edu.uci.ics.genomix.type.GeneCode;
+import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
@@ -12,53 +13,48 @@
 
 public class KMerTextWriterFactory implements ITupleWriterFactory {
 
-	/**
+    /**
 	 * 
 	 */
-	private static final long serialVersionUID = 1L;
-	private final int KMER;
+    private static final long serialVersionUID = 1L;
+    private KmerBytesWritable kmer;
 
-	public KMerTextWriterFactory(int kmer) {
-		KMER = kmer;
-	}
+    public KMerTextWriterFactory(int k) {
+        kmer = new KmerBytesWritable(k);
+    }
 
-	public class TupleWriter implements ITupleWriter {
-		@Override
-		public void write(DataOutput output, ITupleReference tuple)
-				throws HyracksDataException {
-			try {
-				output.write(Kmer.recoverKmerFrom(KMER,
-						tuple.getFieldData(0), tuple.getFieldStart(0),
-						tuple.getFieldLength(0)).getBytes());
-				output.writeByte('\t');
-				output.write(Kmer.GENE_CODE.getSymbolFromBitMap(tuple
-						.getFieldData(1)[tuple.getFieldStart(1)]).getBytes());
-				output.writeByte('\t');
-				output.write(String.valueOf((int)tuple
-						.getFieldData(2)[tuple.getFieldStart(2)]).getBytes());
-				output.writeByte('\n');
-			} catch (IOException e) {
-				throw new HyracksDataException(e);
-			}
-		}
+    public class TupleWriter implements ITupleWriter {
+        @Override
+        public void write(DataOutput output, ITupleReference tuple) throws HyracksDataException {
+            try {
+                kmer.set(tuple.getFieldData(0), tuple.getFieldStart(0), tuple.getFieldLength(0));
+                output.write(kmer.toString().getBytes());
+                output.writeByte('\t');
+                output.write(GeneCode.getSymbolFromBitMap(tuple.getFieldData(1)[tuple.getFieldStart(1)]).getBytes());
+                output.writeByte('\t');
+                output.write(String.valueOf((int) tuple.getFieldData(2)[tuple.getFieldStart(2)]).getBytes());
+                output.writeByte('\n');
+            } catch (IOException e) {
+                throw new HyracksDataException(e);
+            }
+        }
 
-		@Override
-		public void open(DataOutput output) throws HyracksDataException {
-			// TODO Auto-generated method stub
-			
-		}
+        @Override
+        public void open(DataOutput output) throws HyracksDataException {
+            // TODO Auto-generated method stub
 
-		@Override
-		public void close(DataOutput output) throws HyracksDataException {
-			// TODO Auto-generated method stub
-		}
-	}
+        }
 
-	@Override
-	public ITupleWriter getTupleWriter(IHyracksTaskContext ctx)
-			throws HyracksDataException {
-		// TODO Auto-generated method stub
-		return new TupleWriter();
-	}
+        @Override
+        public void close(DataOutput output) throws HyracksDataException {
+            // TODO Auto-generated method stub
+        }
+    }
+
+    @Override
+    public ITupleWriter getTupleWriter(IHyracksTaskContext ctx) throws HyracksDataException {
+        // TODO Auto-generated method stub
+        return new TupleWriter();
+    }
 
 }
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/dataflow/ReadsKeyValueParserFactory.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/dataflow/ReadsKeyValueParserFactory.java
index e5b7fa9..79ad195 100644
--- a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/dataflow/ReadsKeyValueParserFactory.java
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/dataflow/ReadsKeyValueParserFactory.java
@@ -8,8 +8,8 @@
 import org.apache.hadoop.io.Text;
 
 import edu.uci.ics.genomix.data.std.accessors.ByteSerializerDeserializer;
-import edu.uci.ics.genomix.type.Kmer;
-import edu.uci.ics.genomix.type.Kmer.GENE_CODE;
+import edu.uci.ics.genomix.type.GeneCode;
+import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.hyracks.api.comm.IFrameWriter;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
@@ -19,121 +19,124 @@
 import edu.uci.ics.hyracks.hdfs.api.IKeyValueParser;
 import edu.uci.ics.hyracks.hdfs.api.IKeyValueParserFactory;
 
-public class ReadsKeyValueParserFactory implements
-		IKeyValueParserFactory<LongWritable, Text> {
-	private static final long serialVersionUID = 1L;
+;
 
-	private int k;
-	private int byteNum;
-	private boolean bReversed;
+public class ReadsKeyValueParserFactory implements IKeyValueParserFactory<LongWritable, Text> {
+    private static final long serialVersionUID = 1L;
 
-	public ReadsKeyValueParserFactory(int k, boolean bGenerateReversed) {
-		this.k = k;
-		byteNum = (byte) Math.ceil((double) k / 4.0);
-		bReversed = bGenerateReversed;
-	}
+    private KmerBytesWritable kmer;
+    private boolean bReversed;
 
-	@Override
-	public IKeyValueParser<LongWritable, Text> createKeyValueParser(
-			final IHyracksTaskContext ctx) {
-		final ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(2);
-		final ByteBuffer outputBuffer = ctx.allocateFrame();
-		final FrameTupleAppender outputAppender = new FrameTupleAppender(
-				ctx.getFrameSize());
-		outputAppender.reset(outputBuffer, true);
+    public ReadsKeyValueParserFactory(int k, boolean bGenerateReversed) {
+        bReversed = bGenerateReversed;
+        kmer = new KmerBytesWritable(k);
+    }
 
-		return new IKeyValueParser<LongWritable, Text>() {
+    @Override
+    public IKeyValueParser<LongWritable, Text> createKeyValueParser(final IHyracksTaskContext ctx) {
+        final ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(2);
+        final ByteBuffer outputBuffer = ctx.allocateFrame();
+        final FrameTupleAppender outputAppender = new FrameTupleAppender(ctx.getFrameSize());
+        outputAppender.reset(outputBuffer, true);
 
-			@Override
-			public void parse(LongWritable key, Text value, IFrameWriter writer)
-					throws HyracksDataException {
-				String geneLine = value.toString(); // Read the Real Gene Line
-				Pattern genePattern = Pattern.compile("[AGCT]+");
-				Matcher geneMatcher = genePattern.matcher(geneLine);
-				boolean isValid = geneMatcher.matches();
-				if (isValid) {
-					SplitReads(geneLine.getBytes(), writer);
-				}
-			}
+        return new IKeyValueParser<LongWritable, Text>() {
 
-			private void SplitReads(byte[] array, IFrameWriter writer) {
-				/** first kmer */
-				byte[] kmer = Kmer.compressKmer(k, array, 0);
-				byte pre = 0;
-				byte next = GENE_CODE.getAdjBit(array[k]);
-				InsertToFrame(kmer, pre, next, writer);
+            @Override
+            public void parse(LongWritable key, Text value, IFrameWriter writer) throws HyracksDataException {
+                String geneLine = value.toString(); // Read the Real Gene Line
+                Pattern genePattern = Pattern.compile("[AGCT]+");
+                Matcher geneMatcher = genePattern.matcher(geneLine);
+                boolean isValid = geneMatcher.matches();
+                if (isValid) {
+                    SplitReads(geneLine.getBytes(), writer);
+                }
+            }
 
-				/** middle kmer */
-				for (int i = k; i < array.length - 1; i++) {
-					pre = Kmer.moveKmer(k, kmer, array[i]);
-					next = GENE_CODE.getAdjBit(array[i + 1]);
-					InsertToFrame(kmer, pre, next, writer);
+            private void SplitReads(byte[] array, IFrameWriter writer) {
+                /** first kmer */
+                int k = kmer.getKmerLength();
+                kmer.setByRead(array, 0);
+                byte pre = 0;
+                byte next = GeneCode.getAdjBit(array[k]);
+                InsertToFrame(kmer, pre, next, writer);
 
-				}
-				/** last kmer */
-				pre = Kmer.moveKmer(k, kmer, array[array.length - 1]);
-				next = 0;
-				InsertToFrame(kmer, pre, next, writer);
+                /** middle kmer */
+                for (int i = k; i < array.length - 1; i++) {
+                    pre = kmer.shiftKmerWithNextChar(array[i]);
+                    next = GeneCode.getAdjBit(array[i + 1]);
+                    InsertToFrame(kmer, pre, next, writer);
+                }
 
-				if (bReversed) {
-					/** first kmer */
-					kmer = Kmer.compressKmerReverse(k, array, 0);
-					next = 0;
-					pre = GENE_CODE.getAdjBit(array[k]);
-					InsertToFrame(kmer, pre, next, writer);
-					/** middle kmer */
-					for (int i = k; i < array.length - 1; i++) {
-						next = Kmer.moveKmerReverse(k, kmer, array[i]);
-						pre = GENE_CODE.getAdjBit(array[i + 1]);
-						InsertToFrame(kmer, pre, next, writer);
-					}
-					/** last kmer */
-					next = Kmer.moveKmerReverse(k, kmer,
-							array[array.length - 1]);
-					pre = 0;
-					InsertToFrame(kmer, pre, next, writer);
-				}
-			}
+                /** last kmer */
+                pre = kmer.shiftKmerWithNextChar(array[array.length - 1]);
+                next = 0;
+                InsertToFrame(kmer, pre, next, writer);
 
-			private void InsertToFrame(byte[] kmer, byte pre, byte next,
-					IFrameWriter writer) {
-				try {
-					byte adj = GENE_CODE.mergePreNextAdj(pre, next);
-					tupleBuilder.reset();
-					tupleBuilder.addField(kmer, 0, byteNum);
-					tupleBuilder.addField(ByteSerializerDeserializer.INSTANCE,
-							adj);
+                if (bReversed) {
+                    /** first kmer */
+                    kmer.setByReadReverse(array, 0);
+                    next = 0;
+                    pre = GeneCode.getAdjBit(array[k]);
+                    InsertToFrame(kmer, pre, next, writer);
+                    /** middle kmer */
+                    for (int i = k; i < array.length - 1; i++) {
+                        next = kmer.shiftKmerWithPreChar(array[i]);
+                        pre = GeneCode.getAdjBit(array[i + 1]);
+                        InsertToFrame(kmer, pre, next, writer);
+                    }
+                    /** last kmer */
+                    next = kmer.shiftKmerWithPreChar(array[array.length - 1]);
+                    pre = 0;
+                    InsertToFrame(kmer, pre, next, writer);
+                }
+            }
 
-					if (!outputAppender.append(
-							tupleBuilder.getFieldEndOffsets(),
-							tupleBuilder.getByteArray(), 0,
-							tupleBuilder.getSize())) {
-						FrameUtils.flushFrame(outputBuffer, writer);
-						outputAppender.reset(outputBuffer, true);
-						if (!outputAppender.append(
-								tupleBuilder.getFieldEndOffsets(),
-								tupleBuilder.getByteArray(), 0,
-								tupleBuilder.getSize())) {
-							throw new IllegalStateException(
-									"Failed to copy an record into a frame: the record size is too large.");
-						}
-					}
-				} catch (Exception e) {
-					throw new IllegalStateException(e);
-				}
-			}
+            /**
+             * At this graph building phase, we assume the kmer length are all
+             * the same Thus we didn't output those Kmer length
+             * 
+             * @param kmer
+             *            :input kmer
+             * @param pre
+             *            : pre neighbor code
+             * @param next
+             *            : next neighbor code
+             * @param writer
+             *            : output writer
+             */
+            private void InsertToFrame(KmerBytesWritable kmer, byte pre, byte next, IFrameWriter writer) {
+                try {
+                    byte adj = GeneCode.mergePreNextAdj(pre, next);
+                    tupleBuilder.reset();
+                    tupleBuilder.addField(kmer.getBytes(), 0, kmer.getLength());
+                    tupleBuilder.addField(ByteSerializerDeserializer.INSTANCE, adj);
 
-			@Override
-			public void open(IFrameWriter writer) throws HyracksDataException {
-				// TODO Auto-generated method stub
+                    if (!outputAppender.append(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray(), 0,
+                            tupleBuilder.getSize())) {
+                        FrameUtils.flushFrame(outputBuffer, writer);
+                        outputAppender.reset(outputBuffer, true);
+                        if (!outputAppender.append(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray(), 0,
+                                tupleBuilder.getSize())) {
+                            throw new IllegalStateException(
+                                    "Failed to copy an record into a frame: the record size is too large.");
+                        }
+                    }
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
 
-			}
+            @Override
+            public void open(IFrameWriter writer) throws HyracksDataException {
+                // TODO Auto-generated method stub
 
-			@Override
-			public void close(IFrameWriter writer) throws HyracksDataException {
-				FrameUtils.flushFrame(outputBuffer, writer);
-			}
-		};
-	}
+            }
+
+            @Override
+            public void close(IFrameWriter writer) throws HyracksDataException {
+                FrameUtils.flushFrame(outputBuffer, writer);
+            }
+        };
+    }
 
 }
\ No newline at end of file
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/driver/Driver.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/driver/Driver.java
index 27066a2..99d6c89 100644
--- a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/driver/Driver.java
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/driver/Driver.java
@@ -108,7 +108,6 @@
 	private void execute(JobSpecification job) throws Exception {
 		job.setUseConnectorPolicyForScheduling(false);
 		JobId jobId = hcc.startJob(
-				applicationName,
 				job,
 				profiling ? EnumSet.of(JobFlag.PROFILE_RUNTIME) : EnumSet
 						.noneOf(JobFlag.class));
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/job/GenomixJob.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/job/GenomixJob.java
index 0751707..11786f3 100644
--- a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/job/GenomixJob.java
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/job/GenomixJob.java
@@ -31,7 +31,7 @@
 	public static final String GROUPBY_HYBRID_RECORDSIZE_CROSS = "genomix.graph.groupby.hybrid.recordsize.cross";
 	public static final String GROUPBY_HYBRID_HASHLEVEL = "genomix.graph.groupby.hybrid.hashlevel";
 
-	public static final int DEFAULT_KMER = 55;
+	public static final int DEFAULT_KMER = 21;
 	public static final int DEFAULT_FRAME_SIZE = 32768;
 	public static final int DEFAULT_FRAME_LIMIT = 4096;
 	public static final int DEFAULT_TABLE_SIZE = 10485767;
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/job/JobGenBrujinGraph.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/job/JobGenBrujinGraph.java
index 683c0a1..9462fb0 100644
--- a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/job/JobGenBrujinGraph.java
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/job/JobGenBrujinGraph.java
@@ -280,6 +280,10 @@
 	protected void initJobConfiguration() {
 
 		kmers = conf.getInt(GenomixJob.KMER_LENGTH, GenomixJob.DEFAULT_KMER);
+		if (kmers % 2 == 0){
+		    kmers--;
+		    conf.setInt(GenomixJob.KMER_LENGTH, kmers);
+		}
 		frameLimits = conf.getInt(GenomixJob.FRAME_LIMIT,
 				GenomixJob.DEFAULT_FRAME_LIMIT);
 		tableSize = conf.getInt(GenomixJob.TABLE_SIZE,
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/job/JobGenStatistic.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/job/JobGenStatistic.java
new file mode 100644
index 0000000..39cc6fc
--- /dev/null
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/job/JobGenStatistic.java
@@ -0,0 +1,179 @@
+package edu.uci.ics.genomix.job;
+
+import org.apache.hadoop.mapred.InputSplit;
+import org.apache.hadoop.mapred.JobConf;
+import org.apache.hadoop.mapred.SequenceFileInputFormat;
+
+import edu.uci.ics.genomix.data.std.accessors.ByteSerializerDeserializer;
+import edu.uci.ics.genomix.util.ByteComparatorFactory;
+import edu.uci.ics.genomix.util.StatCountAggregateFactory;
+import edu.uci.ics.genomix.util.StatReadsKeyValueParserFactory;
+import edu.uci.ics.genomix.util.StatSumAggregateFactory;
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.IConnectorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITuplePartitionComputer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITuplePartitionComputerFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.dataflow.common.data.partition.FieldHashPartitionComputerFactory;
+import edu.uci.ics.hyracks.dataflow.std.base.AbstractOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.connectors.MToNPartitioningMergingConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.AbstractFileWriteOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.LineFileWriteOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.group.HashSpillableTableFactory;
+import edu.uci.ics.hyracks.dataflow.std.group.IAggregatorDescriptorFactory;
+import edu.uci.ics.hyracks.dataflow.std.group.external.ExternalGroupOperatorDescriptor;
+import edu.uci.ics.hyracks.hdfs.dataflow.HDFSReadOperatorDescriptor;
+import edu.uci.ics.hyracks.hdfs.scheduler.Scheduler;
+
+public class JobGenStatistic extends JobGen {
+	private int kmers;
+	private JobConf hadoopjob;
+	private RecordDescriptor readOutputRec;
+	private String[] ncNodeNames;
+	private Scheduler scheduler;
+	private RecordDescriptor combineOutputRec;
+	
+
+	public JobGenStatistic(GenomixJob job) {
+		super(job);
+		// TODO Auto-generated constructor stub
+	}
+
+	@Override
+	protected void initJobConfiguration() {
+		// TODO Auto-generated method stub
+		kmers = conf.getInt(GenomixJob.KMER_LENGTH, GenomixJob.DEFAULT_KMER);
+		hadoopjob = new JobConf(conf);
+		hadoopjob.setInputFormat(SequenceFileInputFormat.class);
+	}
+
+	@Override
+	public JobSpecification generateJob() throws HyracksException {
+		// TODO Auto-generated method stub
+		int[] degreeFields = { 0 };
+		int[] countFields = { 1 };
+		JobSpecification jobSpec = new JobSpecification();
+		/** specify the record fields after read */
+		readOutputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+				null, ByteSerializerDeserializer.INSTANCE,ByteSerializerDeserializer.INSTANCE });
+		combineOutputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+				null, ByteSerializerDeserializer.INSTANCE });
+		/** the reader */
+		HDFSReadOperatorDescriptor readOperator = createHDFSReader(jobSpec);
+		PartitionConstraintHelper.addAbsoluteLocationConstraint(jobSpec,
+				readOperator, ncNodeNames);
+
+		/** the combiner aggregator */
+		AbstractOperatorDescriptor degreeLocal = connectLocalAggregateByField(
+				jobSpec, degreeFields, readOperator);
+		AbstractOperatorDescriptor countLocal = connectLocalAggregateByField(
+				jobSpec, countFields, readOperator);
+
+		/** the final aggregator */
+		AbstractOperatorDescriptor degreeMerger = connectFinalAggregateByField(
+				jobSpec, degreeFields, degreeLocal);
+		AbstractOperatorDescriptor countMerger = connectFinalAggregateByField(
+				jobSpec, countFields, countLocal);
+		
+		/** writer */
+		AbstractFileWriteOperatorDescriptor writeDegree = connectWriter(
+				jobSpec, degreeFields, degreeMerger);
+		AbstractFileWriteOperatorDescriptor writeCount = connectWriter(
+				jobSpec, countFields, countMerger);
+		jobSpec.addRoot(writeDegree);
+		jobSpec.addRoot(writeCount);
+		return null;
+	}
+
+	private HDFSReadOperatorDescriptor createHDFSReader(JobSpecification jobSpec)
+			throws HyracksDataException {
+		try {
+
+			InputSplit[] splits = hadoopjob.getInputFormat().getSplits(
+					hadoopjob, ncNodeNames.length);
+
+			String[] readSchedule = scheduler.getLocationConstraints(splits);
+			return new HDFSReadOperatorDescriptor(jobSpec, readOutputRec,
+					hadoopjob, splits, readSchedule,
+					new StatReadsKeyValueParserFactory());
+		} catch (Exception e) {
+			throw new HyracksDataException(e);
+		}
+	}
+
+	private ExternalGroupOperatorDescriptor newExternalGroupby(
+			JobSpecification jobSpec, int[] keyFields,
+			IAggregatorDescriptorFactory aggeragater) {
+		return new ExternalGroupOperatorDescriptor(jobSpec, keyFields,
+				GenomixJob.DEFAULT_FRAME_LIMIT, new IBinaryComparatorFactory[] {
+						new ByteComparatorFactory() }, null, aggeragater,
+				new StatSumAggregateFactory(),
+				combineOutputRec, new HashSpillableTableFactory(
+						new FieldHashPartitionComputerFactory(keyFields,
+								new IBinaryHashFunctionFactory[] {
+										new ByteComparatorFactory() }),
+						GenomixJob.DEFAULT_TABLE_SIZE), true);
+	}
+
+	private AbstractOperatorDescriptor connectLocalAggregateByField(
+			JobSpecification jobSpec, int[] fields,
+			HDFSReadOperatorDescriptor readOperator) {
+		AbstractOperatorDescriptor localAggregator = newExternalGroupby(
+				jobSpec, fields, new StatCountAggregateFactory());
+		PartitionConstraintHelper.addAbsoluteLocationConstraint(jobSpec,
+				localAggregator, ncNodeNames);
+		IConnectorDescriptor readfileConn = new OneToOneConnectorDescriptor(
+				jobSpec);
+		jobSpec.connect(readfileConn, readOperator, 0, localAggregator, 0);
+		return localAggregator;
+	}
+
+	private AbstractOperatorDescriptor connectFinalAggregateByField(JobSpecification jobSpec,
+			int[] fields, AbstractOperatorDescriptor localAggregator) {
+		AbstractOperatorDescriptor finalAggregator = newExternalGroupby(
+				jobSpec, fields, new StatSumAggregateFactory());
+		// only need one reducer
+		PartitionConstraintHelper.addAbsoluteLocationConstraint(jobSpec,
+				finalAggregator, ncNodeNames[fields[0] % ncNodeNames.length]);
+		IConnectorDescriptor mergeConn = new MToNPartitioningMergingConnectorDescriptor(
+				jobSpec,
+				new ITuplePartitionComputerFactory(){
+					private static final long serialVersionUID = 1L;
+					@Override
+					public ITuplePartitionComputer createPartitioner() {
+						return new ITuplePartitionComputer(){
+							@Override
+							public int partition(IFrameTupleAccessor accessor,
+									int tIndex, int nParts)
+									throws HyracksDataException {
+								return 0;
+							}
+						};
+					}
+				},
+				fields, 
+				new IBinaryComparatorFactory[]{new ByteComparatorFactory()});
+		jobSpec.connect(mergeConn, localAggregator, 0, finalAggregator, 0);
+		return finalAggregator;
+	}
+	
+	private AbstractFileWriteOperatorDescriptor connectWriter(JobSpecification jobSpec, int [] fields, AbstractOperatorDescriptor finalAggregator){
+		LineFileWriteOperatorDescriptor writeOperator = new LineFileWriteOperatorDescriptor(
+				jobSpec, null);
+		PartitionConstraintHelper.addAbsoluteLocationConstraint(jobSpec,
+				writeOperator, ncNodeNames[fields[0] % ncNodeNames.length]);
+
+		IConnectorDescriptor printConn = new OneToOneConnectorDescriptor(
+				jobSpec);
+		jobSpec.connect(printConn, finalAggregator, 0, writeOperator, 0);
+		return writeOperator;
+	}
+}
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/util/ByteComparatorFactory.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/util/ByteComparatorFactory.java
new file mode 100644
index 0000000..b469be0
--- /dev/null
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/util/ByteComparatorFactory.java
@@ -0,0 +1,40 @@
+package edu.uci.ics.genomix.util;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunction;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFactory;
+
+public class ByteComparatorFactory implements IBinaryComparatorFactory, IBinaryHashFunctionFactory {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+
+	@Override
+	public IBinaryComparator createBinaryComparator() {
+		return new IBinaryComparator(){
+
+			@Override
+			public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2,
+					int l2) {
+				return b1[s1]-b2[s2];
+			}
+			
+		};
+	}
+
+	@Override
+	public IBinaryHashFunction createBinaryHashFunction() {
+		return new IBinaryHashFunction(){
+
+			@Override
+			public int hash(byte[] bytes, int offset, int length) {
+				return bytes[offset];
+			}
+			
+		};
+	}
+
+}
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/util/StatCountAggregateFactory.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/util/StatCountAggregateFactory.java
new file mode 100644
index 0000000..49a7453
--- /dev/null
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/util/StatCountAggregateFactory.java
@@ -0,0 +1,121 @@
+package edu.uci.ics.genomix.util;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.std.group.AggregateState;
+import edu.uci.ics.hyracks.dataflow.std.group.IAggregatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.group.IAggregatorDescriptorFactory;
+
+public class StatCountAggregateFactory implements
+		IAggregatorDescriptorFactory {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+
+	public class CountAggregator implements IAggregatorDescriptor {
+
+		@Override
+		public AggregateState createAggregateStates() {
+			// TODO Auto-generated method stub
+			return null;
+		}
+
+		@Override
+		public void init(ArrayTupleBuilder tupleBuilder,
+				IFrameTupleAccessor accessor, int tIndex, AggregateState state)
+				throws HyracksDataException {
+			int count = 1;
+			DataOutput fieldOutput = tupleBuilder.getDataOutput();
+			try {
+				fieldOutput.writeInt(count);
+				tupleBuilder.addFieldEndOffset();
+			} catch (IOException e) {
+				throw new HyracksDataException(
+						"I/O exception when initializing the aggregator.");
+			}
+		}
+
+		@Override
+		public void reset() {
+			// TODO Auto-generated method stub
+
+		}
+
+		@Override
+		public void aggregate(IFrameTupleAccessor accessor, int tIndex,
+				IFrameTupleAccessor stateAccessor, int stateTupleIndex,
+				AggregateState state) throws HyracksDataException {
+			int count = 1;
+
+			int statetupleOffset = stateAccessor
+					.getTupleStartOffset(stateTupleIndex);
+			int countfieldStart = stateAccessor.getFieldStartOffset(
+					stateTupleIndex, 1);
+			int countoffset = statetupleOffset
+					+ stateAccessor.getFieldSlotsLength() + countfieldStart;
+
+			byte[] data = stateAccessor.getBuffer().array();
+			count += IntegerSerializerDeserializer.getInt(data, countoffset);
+			IntegerSerializerDeserializer.putInt(count, data, countoffset);
+		}
+
+		@Override
+		public void outputPartialResult(ArrayTupleBuilder tupleBuilder,
+				IFrameTupleAccessor accessor, int tIndex, AggregateState state)
+				throws HyracksDataException {
+			int count = getCount(accessor, tIndex);
+			DataOutput fieldOutput = tupleBuilder.getDataOutput();
+			try {
+				fieldOutput.writeInt(count);
+				tupleBuilder.addFieldEndOffset();
+			} catch (IOException e) {
+				throw new HyracksDataException(
+						"I/O exception when writing aggregation to the output buffer.");
+			}
+
+		}
+
+		protected int getCount(IFrameTupleAccessor accessor, int tIndex) {
+			int tupleOffset = accessor.getTupleStartOffset(tIndex);
+			int fieldStart = accessor.getFieldStartOffset(tIndex, 1);
+			int countoffset = tupleOffset + accessor.getFieldSlotsLength()
+					+ fieldStart;
+			byte[] data = accessor.getBuffer().array();
+
+			return IntegerSerializerDeserializer.getInt(data, countoffset);
+		}
+
+		@Override
+		public void outputFinalResult(ArrayTupleBuilder tupleBuilder,
+				IFrameTupleAccessor accessor, int tIndex, AggregateState state)
+				throws HyracksDataException {
+			outputPartialResult(tupleBuilder, accessor, tIndex, state);
+		}
+
+		@Override
+		public void close() {
+			// TODO Auto-generated method stub
+
+		}
+
+	}
+
+	@Override
+	public IAggregatorDescriptor createAggregator(IHyracksTaskContext ctx,
+			RecordDescriptor inRecordDescriptor,
+			RecordDescriptor outRecordDescriptor, int[] keyFields,
+			int[] keyFieldsInPartialResults) throws HyracksDataException {
+		// TODO Auto-generated method stub
+		return new CountAggregator();
+	}
+
+}
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/util/StatReadsKeyValueParserFactory.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/util/StatReadsKeyValueParserFactory.java
new file mode 100644
index 0000000..561d64a
--- /dev/null
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/util/StatReadsKeyValueParserFactory.java
@@ -0,0 +1,86 @@
+package edu.uci.ics.genomix.util;
+
+import java.nio.ByteBuffer;
+
+import org.apache.hadoop.io.BytesWritable;
+
+import edu.uci.ics.genomix.data.std.accessors.ByteSerializerDeserializer;
+import edu.uci.ics.genomix.type.GeneCode;
+import edu.uci.ics.genomix.type.KmerCountValue;
+import edu.uci.ics.genomix.type.KmerUtil;
+import edu.uci.ics.hyracks.api.comm.IFrameWriter;
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
+import edu.uci.ics.hyracks.dataflow.common.comm.util.FrameUtils;
+import edu.uci.ics.hyracks.hdfs.api.IKeyValueParser;
+import edu.uci.ics.hyracks.hdfs.api.IKeyValueParserFactory;
+
+public class StatReadsKeyValueParserFactory implements IKeyValueParserFactory<BytesWritable,KmerCountValue> {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+
+	@Override
+	public IKeyValueParser<BytesWritable,KmerCountValue> createKeyValueParser(IHyracksTaskContext ctx)
+			throws HyracksDataException {
+		
+		final ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(2);
+		final ByteBuffer outputBuffer = ctx.allocateFrame();
+		final FrameTupleAppender outputAppender = new FrameTupleAppender(
+				ctx.getFrameSize());
+		outputAppender.reset(outputBuffer, true);
+		
+		return new IKeyValueParser<BytesWritable,KmerCountValue>(){
+
+			@Override
+			public void open(IFrameWriter writer) throws HyracksDataException {
+				// TODO Auto-generated method stub
+				
+			}
+
+			@Override
+			public void parse(BytesWritable key, KmerCountValue value,
+					IFrameWriter writer) throws HyracksDataException {
+				byte adjMap = value.getAdjBitMap();
+				byte count = value.getCount();
+				InsertToFrame((byte) (GeneCode.inDegree(adjMap)*10+GeneCode.outDegree(adjMap)),count,writer);
+			}
+
+			@Override
+			public void close(IFrameWriter writer) throws HyracksDataException {
+				FrameUtils.flushFrame(outputBuffer, writer);
+			}
+			
+			private void InsertToFrame(byte degree, byte count,
+					IFrameWriter writer) {
+				try {
+					tupleBuilder.reset();
+					tupleBuilder.addField(ByteSerializerDeserializer.INSTANCE,degree);
+					tupleBuilder.addField(ByteSerializerDeserializer.INSTANCE,count);
+
+					if (!outputAppender.append(
+							tupleBuilder.getFieldEndOffsets(),
+							tupleBuilder.getByteArray(), 0,
+							tupleBuilder.getSize())) {
+						FrameUtils.flushFrame(outputBuffer, writer);
+						outputAppender.reset(outputBuffer, true);
+						if (!outputAppender.append(
+								tupleBuilder.getFieldEndOffsets(),
+								tupleBuilder.getByteArray(), 0,
+								tupleBuilder.getSize())) {
+							throw new IllegalStateException(
+									"Failed to copy an record into a frame: the record size is too large.");
+						}
+					}
+				} catch (Exception e) {
+					throw new IllegalStateException(e);
+				}
+			}
+		};
+	}
+
+}
diff --git a/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/util/StatSumAggregateFactory.java b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/util/StatSumAggregateFactory.java
new file mode 100644
index 0000000..ce00667
--- /dev/null
+++ b/genomix/genomix-hyracks/src/main/java/edu/uci/ics/genomix/util/StatSumAggregateFactory.java
@@ -0,0 +1,122 @@
+package edu.uci.ics.genomix.util;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.std.group.AggregateState;
+import edu.uci.ics.hyracks.dataflow.std.group.IAggregatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.group.IAggregatorDescriptorFactory;
+
+public class StatSumAggregateFactory implements IAggregatorDescriptorFactory {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+
+	public class DistributeAggregatorDescriptor implements
+			IAggregatorDescriptor {
+
+		@Override
+		public AggregateState createAggregateStates() {
+			// TODO Auto-generated method stub
+			return null;
+		}
+
+		protected int getCount(IFrameTupleAccessor accessor, int tIndex) {
+			int tupleOffset = accessor.getTupleStartOffset(tIndex);
+			int fieldStart = accessor.getFieldStartOffset(tIndex, 1);
+			int countoffset = tupleOffset + accessor.getFieldSlotsLength()
+					+ fieldStart;
+			byte[] data = accessor.getBuffer().array();
+			return IntegerSerializerDeserializer.getInt(data, countoffset);
+		}
+
+		@Override
+		public void init(ArrayTupleBuilder tupleBuilder,
+				IFrameTupleAccessor accessor, int tIndex, AggregateState state)
+				throws HyracksDataException {
+			int count = getCount(accessor, tIndex);
+
+			DataOutput fieldOutput = tupleBuilder.getDataOutput();
+			try {
+				fieldOutput.writeInt(count);
+				tupleBuilder.addFieldEndOffset();
+			} catch (IOException e) {
+				throw new HyracksDataException(
+						"I/O exception when initializing the aggregator.");
+			}
+		}
+
+		@Override
+		public void reset() {
+			// TODO Auto-generated method stub
+
+		}
+
+		@Override
+		public void aggregate(IFrameTupleAccessor accessor, int tIndex,
+				IFrameTupleAccessor stateAccessor, int stateTupleIndex,
+				AggregateState state) throws HyracksDataException {
+			int count = getCount(accessor, tIndex);
+
+			int statetupleOffset = stateAccessor
+					.getTupleStartOffset(stateTupleIndex);
+			int countfieldStart = stateAccessor.getFieldStartOffset(
+					stateTupleIndex, 1);
+			int countoffset = statetupleOffset
+					+ stateAccessor.getFieldSlotsLength() + countfieldStart;
+
+			byte[] data = stateAccessor.getBuffer().array();
+			count += IntegerSerializerDeserializer.getInt(data, countoffset);
+			IntegerSerializerDeserializer.putInt(count, data, countoffset);
+		}
+
+		@Override
+		public void outputPartialResult(ArrayTupleBuilder tupleBuilder,
+				IFrameTupleAccessor accessor, int tIndex, AggregateState state)
+				throws HyracksDataException {
+			int count = getCount(accessor, tIndex);
+			DataOutput fieldOutput = tupleBuilder.getDataOutput();
+			try {
+				fieldOutput.writeInt(count);
+				tupleBuilder.addFieldEndOffset();
+			} catch (IOException e) {
+				throw new HyracksDataException(
+						"I/O exception when writing aggregation to the output buffer.");
+			}
+
+		}
+
+		@Override
+		public void outputFinalResult(ArrayTupleBuilder tupleBuilder,
+				IFrameTupleAccessor accessor, int tIndex, AggregateState state)
+				throws HyracksDataException {
+			outputPartialResult(tupleBuilder, accessor, tIndex, state);
+
+		}
+
+		@Override
+		public void close() {
+			// TODO Auto-generated method stub
+
+		}
+
+	}
+
+	@Override
+	public IAggregatorDescriptor createAggregator(IHyracksTaskContext ctx,
+			RecordDescriptor inRecordDescriptor,
+			RecordDescriptor outRecordDescriptor, int[] keyFields,
+			int[] keyFieldsInPartialResults) throws HyracksDataException {
+		// TODO Auto-generated method stub
+		return new DistributeAggregatorDescriptor();
+	}
+
+}
diff --git a/genomix/genomix-hyracks/src/main/resources/scripts/startAllNCs.sh b/genomix/genomix-hyracks/src/main/resources/scripts/startAllNCs.sh
index 5e38c40..28fcb84 100644
--- a/genomix/genomix-hyracks/src/main/resources/scripts/startAllNCs.sh
+++ b/genomix/genomix-hyracks/src/main/resources/scripts/startAllNCs.sh
@@ -2,5 +2,5 @@
 
 for i in `cat conf/slaves`
 do
-   ssh $i "cd ${GENOMIX_PATH}; bin/startnc.sh"
+   ssh $i "cd ${GENOMIX_PATH}; export JAVA_HOME=${JAVA_HOME}; bin/startnc.sh"
 done
diff --git a/genomix/genomix-hyracks/src/main/resources/scripts/startCluster.sh b/genomix/genomix-hyracks/src/main/resources/scripts/startCluster.sh
index 4727764..843a6b1 100755
--- a/genomix/genomix-hyracks/src/main/resources/scripts/startCluster.sh
+++ b/genomix/genomix-hyracks/src/main/resources/scripts/startCluster.sh
@@ -2,18 +2,3 @@
 sleep 5
 bin/startAllNCs.sh
 
-. conf/cluster.properties
-# do we need to specify the version somewhere?
-hyrackcmd=`ls ${HYRACKS_HOME}/hyracks-cli/target/hyracks-cli-*-binary-assembly/bin/hyrackscli`
-# find zip file
-appzip=`ls $PWD/../genomix-*-binary-assembly.zip`
-
-[ -f $hyrackcmd ] || { echo "Hyracks commandline is missing"; exit -1;}
-[ -f $appzip ] || { echo "Genomix binary-assembly.zip is missing"; exit -1;}
-
-CCHOST_NAME=`cat conf/master`
-
-IPADDR=`bin/getip.sh`
-echo "connect to \"${IPADDR}:${CC_CLIENTPORT}\"; create application genomix \"$appzip\";" | $hyrackcmd 
-echo ""
-
diff --git a/genomix/genomix-hyracks/src/main/resources/scripts/startcc.sh b/genomix/genomix-hyracks/src/main/resources/scripts/startcc.sh
index 63b1aca..67023c1 100644
--- a/genomix/genomix-hyracks/src/main/resources/scripts/startcc.sh
+++ b/genomix/genomix-hyracks/src/main/resources/scripts/startcc.sh
@@ -20,6 +20,7 @@
 export JAVA_HOME=$JAVA_HOME
 export JAVA_OPTS=$CCJAVA_OPTS
 
+GENOMIX_HOME=`pwd`
+cd $CCTMP_DIR
 #Launch hyracks cc script
-chmod -R 755 $HYRACKS_HOME
-$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyrackscc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 3 &> $CCLOGS_DIR/cc.log &
+${GENOMIX_HOME}/bin/genomixcc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 3 &> $CCLOGS_DIR/cc.log &
diff --git a/genomix/genomix-hyracks/src/main/resources/scripts/startnc.sh b/genomix/genomix-hyracks/src/main/resources/scripts/startnc.sh
index 1a45521..bfcc1d4 100644
--- a/genomix/genomix-hyracks/src/main/resources/scripts/startnc.sh
+++ b/genomix/genomix-hyracks/src/main/resources/scripts/startnc.sh
@@ -39,11 +39,10 @@
 #Set JAVA_OPTS
 export JAVA_OPTS=$NCJAVA_OPTS
 
-cd $HYRACKS_HOME
-HYRACKS_HOME=`pwd`
+GENOMIX_HOME=`pwd`
 
 #Enter the temp dir
 cd $NCTMP_DIR
 
 #Launch hyracks nc
-$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyracksnc -cc-host $CCHOST -cc-port $CC_CLUSTERPORT -cluster-net-ip-address $IPADDR  -data-ip-address $IPADDR -result-ip-address $IPADDR -node-id $NODEID -iodevices "${IO_DIRS}" &> $NCLOGS_DIR/$NODEID.log &
+${GENOMIX_HOME}/bin/genomixnc -cc-host $CCHOST -cc-port $CC_CLUSTERPORT -cluster-net-ip-address $IPADDR  -data-ip-address $IPADDR -result-ip-address $IPADDR -node-id $NODEID -iodevices "${IO_DIRS}" &> $NCLOGS_DIR/$NODEID.log &
diff --git a/genomix/genomix-hyracks/src/main/resources/scripts/stopcc.sh b/genomix/genomix-hyracks/src/main/resources/scripts/stopcc.sh
index 1865054..6d1b2d2 100644
--- a/genomix/genomix-hyracks/src/main/resources/scripts/stopcc.sh
+++ b/genomix/genomix-hyracks/src/main/resources/scripts/stopcc.sh
@@ -2,9 +2,19 @@
 . conf/cluster.properties
 
 #Kill process
-PID=`ps -ef|grep ${USER}|grep java|grep hyracks|awk '{print $2}'`
+PID=`ps -ef|grep ${USER}|grep java|grep 'Dapp.name=genomixcc'|awk '{print $2}'`
+
+if [ "$PID" == "" ]; then
+    PID=`ps -ef|grep ${USER}|grep java|grep 'hyracks'|awk '{print $2}'`
+fi
+
+if [ "$PID" == "" ]; then
+    USERID=`id | sed 's/^uid=//;s/(.*$//'`
+    PID=`ps -ef|grep ${USERID}|grep java|grep 'Dapp.name=genomixcc'|awk '{print $2}'`
+fi
+
 echo $PID
-[ "$PID" != "" ] && kill -9 $PID
+kill -9 $PID
 
 #Clean up CC temp dir
 rm -rf $CCTMP_DIR/*
diff --git a/genomix/genomix-hyracks/src/main/resources/scripts/stopnc.sh b/genomix/genomix-hyracks/src/main/resources/scripts/stopnc.sh
index 3928bb7..092e232 100644
--- a/genomix/genomix-hyracks/src/main/resources/scripts/stopnc.sh
+++ b/genomix/genomix-hyracks/src/main/resources/scripts/stopnc.sh
@@ -2,15 +2,23 @@
 . conf/cluster.properties
 
 #Kill process
-PID=`ps -ef|grep ${USER}|grep java|grep 'Dapp.name=hyracksnc'|awk '{print $2}'`
+PID=`ps -ef|grep ${USER}|grep java|grep 'Dapp.name=genomixnc'|awk '{print $2}'`
+
+if [ "$PID" == "" ]; then
+  PID=`ps -ef|grep ${USER}|grep java|grep 'hyracks'|awk '{print $2}'`
+fi
+
+if [ "$PID" == "" ]; then
+  PID=`ps -ef|grep ${USER}|grep java|grep 'hyracks'|awk '{print $2}'`
+fi
 
 if [ "$PID" == "" ]; then
   USERID=`id | sed 's/^uid=//;s/(.*$//'`
-  PID=`ps -ef|grep ${USERID}|grep java|grep 'Dapp.name=hyracksnc'|awk '{print $2}'`
+  PID=`ps -ef|grep ${USERID}|grep java|grep 'Dapp.name=genomixnc'|awk '{print $2}'`
 fi
 
 echo $PID
-[ "$PID" != "" ] && kill -9 $PID
+kill -9 $PID
 
 #Clean up I/O working dir
 io_dirs=$(echo $IO_DIRS | tr "," "\n")
diff --git a/genomix/genomix-hyracks/src/test/java/edu/uci/ics/genomix/example/jobrun/JobRunTest.java b/genomix/genomix-hyracks/src/test/java/edu/uci/ics/genomix/example/jobrun/JobRunTest.java
index 5a64f78..bef13b5 100644
--- a/genomix/genomix-hyracks/src/test/java/edu/uci/ics/genomix/example/jobrun/JobRunTest.java
+++ b/genomix/genomix-hyracks/src/test/java/edu/uci/ics/genomix/example/jobrun/JobRunTest.java
@@ -15,7 +15,6 @@
 import org.apache.hadoop.fs.FileUtil;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
-import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.io.SequenceFile;
 import org.apache.hadoop.mapred.FileInputFormat;
 import org.apache.hadoop.mapred.FileOutputFormat;
@@ -28,223 +27,204 @@
 import edu.uci.ics.genomix.driver.Driver;
 import edu.uci.ics.genomix.driver.Driver.Plan;
 import edu.uci.ics.genomix.job.GenomixJob;
-import edu.uci.ics.genomix.type.Kmer;
+import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.genomix.type.KmerCountValue;
-import edu.uci.ics.hyracks.hdfs.utils.HyracksUtils;
-import edu.uci.ics.hyracks.hdfs.utils.TestUtils;
 
 public class JobRunTest {
-	private static final String ACTUAL_RESULT_DIR = "actual";
-	private static final String PATH_TO_HADOOP_CONF = "src/test/resources/hadoop/conf";
+    private static final String ACTUAL_RESULT_DIR = "actual";
+    private static final String PATH_TO_HADOOP_CONF = "src/test/resources/hadoop/conf";
 
-	private static final String DATA_PATH = "src/test/resources/data/mergeTest/ThreeKmer";
-	private static final String HDFS_INPUT_PATH = "/webmap";
-	private static final String HDFS_OUTPUT_PATH = "/webmap_result";
+    private static final String DATA_PATH = "src/test/resources/data/webmap/text.txt";
+    private static final String HDFS_INPUT_PATH = "/webmap";
+    private static final String HDFS_OUTPUT_PATH = "/webmap_result";
 
-	private static final String DUMPED_RESULT = ACTUAL_RESULT_DIR
-			+ HDFS_OUTPUT_PATH + "/merged.txt";
-	private static final String CONVERT_RESULT = DUMPED_RESULT + ".txt";
-	private static final String EXPECTED_PATH = "src/test/resources/expected/result2";
-	private static final String EXPECTED_REVERSE_PATH = "src/test/resources/expected/result_reverse";
+    private static final String DUMPED_RESULT = ACTUAL_RESULT_DIR + HDFS_OUTPUT_PATH + "/merged.txt";
+    private static final String CONVERT_RESULT = DUMPED_RESULT + ".txt";
+    private static final String EXPECTED_PATH = "src/test/resources/expected/result2";
+    private static final String EXPECTED_REVERSE_PATH = "src/test/resources/expected/result_reverse";
 
-	private static final String HYRACKS_APP_NAME = "genomix";
-	private static final String HADOOP_CONF_PATH = ACTUAL_RESULT_DIR
-			+ File.separator + "conf.xml";
-	private MiniDFSCluster dfsCluster;
+    private static final String HADOOP_CONF_PATH = ACTUAL_RESULT_DIR + File.separator + "conf.xml";
+    private MiniDFSCluster dfsCluster;
 
-	private JobConf conf = new JobConf();
-	private int numberOfNC = 2;
-	private int numPartitionPerMachine = 1;
+    private JobConf conf = new JobConf();
+    private int numberOfNC = 2;
+    private int numPartitionPerMachine = 1;
 
-	private Driver driver;
+    private Driver driver;
 
-	@Before
-	public void setUp() throws Exception {
-		cleanupStores();
-		HyracksUtils.init();
-		HyracksUtils.createApp(HYRACKS_APP_NAME);
-		FileUtils.forceMkdir(new File(ACTUAL_RESULT_DIR));
-		FileUtils.cleanDirectory(new File(ACTUAL_RESULT_DIR));
-		startHDFS();
+    @Before
+    public void setUp() throws Exception {
+        cleanupStores();
+        edu.uci.ics.hyracks.hdfs.utils.HyracksUtils.init();
+        FileUtils.forceMkdir(new File(ACTUAL_RESULT_DIR));
+        FileUtils.cleanDirectory(new File(ACTUAL_RESULT_DIR));
+        startHDFS();
 
-		FileInputFormat.setInputPaths(conf, HDFS_INPUT_PATH);
-		FileOutputFormat.setOutputPath(conf, new Path(HDFS_OUTPUT_PATH));
+        FileInputFormat.setInputPaths(conf, HDFS_INPUT_PATH);
+        FileOutputFormat.setOutputPath(conf, new Path(HDFS_OUTPUT_PATH));
 
-		conf.setInt(GenomixJob.KMER_LENGTH, 5);
-		driver = new Driver(HyracksUtils.CC_HOST,
-				HyracksUtils.TEST_HYRACKS_CC_CLIENT_PORT,
-				numPartitionPerMachine);
-	}
+        conf.setInt(GenomixJob.KMER_LENGTH, 5);
+        driver = new Driver(edu.uci.ics.hyracks.hdfs.utils.HyracksUtils.CC_HOST,
+                edu.uci.ics.hyracks.hdfs.utils.HyracksUtils.TEST_HYRACKS_CC_CLIENT_PORT, numPartitionPerMachine);
+    }
 
-	private void cleanupStores() throws IOException {
-		FileUtils.forceMkdir(new File("teststore"));
-		FileUtils.forceMkdir(new File("build"));
-		FileUtils.cleanDirectory(new File("teststore"));
-		FileUtils.cleanDirectory(new File("build"));
-	}
+    private void cleanupStores() throws IOException {
+        FileUtils.forceMkdir(new File("teststore"));
+        FileUtils.forceMkdir(new File("build"));
+        FileUtils.cleanDirectory(new File("teststore"));
+        FileUtils.cleanDirectory(new File("build"));
+    }
 
-	private void startHDFS() throws IOException {
-		conf.addResource(new Path(PATH_TO_HADOOP_CONF + "/core-site.xml"));
-		conf.addResource(new Path(PATH_TO_HADOOP_CONF + "/mapred-site.xml"));
-		conf.addResource(new Path(PATH_TO_HADOOP_CONF + "/hdfs-site.xml"));
+    private void startHDFS() throws IOException {
+        conf.addResource(new Path(PATH_TO_HADOOP_CONF + "/core-site.xml"));
+        conf.addResource(new Path(PATH_TO_HADOOP_CONF + "/mapred-site.xml"));
+        conf.addResource(new Path(PATH_TO_HADOOP_CONF + "/hdfs-site.xml"));
 
-		FileSystem lfs = FileSystem.getLocal(new Configuration());
-		lfs.delete(new Path("build"), true);
-		System.setProperty("hadoop.log.dir", "logs");
-		dfsCluster = new MiniDFSCluster(conf, numberOfNC, true, null);
-		FileSystem dfs = FileSystem.get(conf);
-		Path src = new Path(DATA_PATH);
-		Path dest = new Path(HDFS_INPUT_PATH);
-		Path result = new Path(HDFS_OUTPUT_PATH);
-		dfs.mkdirs(dest);
-		//dfs.mkdirs(result);
-		dfs.copyFromLocalFile(src, dest);
+        FileSystem lfs = FileSystem.getLocal(new Configuration());
+        lfs.delete(new Path("build"), true);
+        System.setProperty("hadoop.log.dir", "logs");
+        dfsCluster = new MiniDFSCluster(conf, numberOfNC, true, null);
+        FileSystem dfs = FileSystem.get(conf);
+        Path src = new Path(DATA_PATH);
+        Path dest = new Path(HDFS_INPUT_PATH);
+        dfs.mkdirs(dest);
+        //dfs.mkdirs(result);
+        dfs.copyFromLocalFile(src, dest);
 
-		DataOutputStream confOutput = new DataOutputStream(
-				new FileOutputStream(new File(HADOOP_CONF_PATH)));
-		conf.writeXml(confOutput);
-		confOutput.flush();
-		confOutput.close();
-	}
+        DataOutputStream confOutput = new DataOutputStream(new FileOutputStream(new File(HADOOP_CONF_PATH)));
+        conf.writeXml(confOutput);
+        confOutput.flush();
+        confOutput.close();
+    }
 
-	private void cleanUpReEntry() throws IOException {
-		FileSystem lfs = FileSystem.getLocal(new Configuration());
-		if (lfs.exists(new Path(DUMPED_RESULT))) {
-			lfs.delete(new Path(DUMPED_RESULT), true);
-		}
-		FileSystem dfs = FileSystem.get(conf);
-		if (dfs.exists(new Path(HDFS_OUTPUT_PATH))) {
-			dfs.delete(new Path(HDFS_OUTPUT_PATH), true);
-		}
-	}
+    private void cleanUpReEntry() throws IOException {
+        FileSystem lfs = FileSystem.getLocal(new Configuration());
+        if (lfs.exists(new Path(DUMPED_RESULT))) {
+            lfs.delete(new Path(DUMPED_RESULT), true);
+        }
+        FileSystem dfs = FileSystem.get(conf);
+        if (dfs.exists(new Path(HDFS_OUTPUT_PATH))) {
+            dfs.delete(new Path(HDFS_OUTPUT_PATH), true);
+        }
+    }
 
-	@Test
-	public void TestAll() throws Exception{
-		cleanUpReEntry();
-		TestExternalGroupby();
-		cleanUpReEntry();
-		TestPreClusterGroupby();
-		cleanUpReEntry();
-		TestHybridGroupby();
-		cleanUpReEntry();
-		conf.setBoolean(GenomixJob.REVERSED_KMER, true);
-		TestExternalReversedGroupby();
-		cleanUpReEntry();
-		TestPreClusterReversedGroupby();
-		cleanUpReEntry();
-		TestHybridReversedGroupby();
-	}
-	
-	public void TestExternalGroupby() throws Exception {
-		conf.set(GenomixJob.GROUPBY_TYPE, "external");
-		System.err.println("Testing ExternalGroupBy");
-		driver.runJob(new GenomixJob(conf), Plan.BUILD_DEBRUJIN_GRAPH, true);
-		Assert.assertEquals(true, checkResults(EXPECTED_PATH));
-	}
+    @Test
+    public void TestAll() throws Exception {
+        cleanUpReEntry();
+        TestExternalGroupby();
+        cleanUpReEntry();
+        TestPreClusterGroupby();
+        cleanUpReEntry();
+        TestHybridGroupby();
+        cleanUpReEntry();
+        conf.setBoolean(GenomixJob.REVERSED_KMER, true);
+        TestExternalReversedGroupby();
+        cleanUpReEntry();
+        TestPreClusterReversedGroupby();
+        cleanUpReEntry();
+        TestHybridReversedGroupby();
+    }
 
-	public void TestPreClusterGroupby() throws Exception {
-		conf.set(GenomixJob.GROUPBY_TYPE, "precluster");
-		System.err.println("Testing PreClusterGroupBy");
-		driver.runJob(new GenomixJob(conf), Plan.BUILD_DEBRUJIN_GRAPH, true);
-		Assert.assertEquals(true, checkResults(EXPECTED_PATH));
-	}
+    public void TestExternalGroupby() throws Exception {
+        conf.set(GenomixJob.GROUPBY_TYPE, "external");
+        System.err.println("Testing ExternalGroupBy");
+        driver.runJob(new GenomixJob(conf), Plan.BUILD_DEBRUJIN_GRAPH, true);
+        Assert.assertEquals(true, checkResults(EXPECTED_PATH));
+    }
 
-	public void TestHybridGroupby() throws Exception {
-		conf.set(GenomixJob.GROUPBY_TYPE, "hybrid");
-		System.err.println("Testing HybridGroupBy");
-		driver.runJob(new GenomixJob(conf), Plan.BUILD_DEBRUJIN_GRAPH, true);
-		Assert.assertEquals(true, checkResults(EXPECTED_PATH));
-	}
-	
-	public void TestExternalReversedGroupby() throws Exception{
-		conf.set(GenomixJob.GROUPBY_TYPE, "external");
-		conf.setBoolean(GenomixJob.REVERSED_KMER, true);
-		System.err.println("Testing ExternalGroupBy + Reversed");
-		driver.runJob(new GenomixJob(conf), Plan.BUILD_DEBRUJIN_GRAPH, true);
-		Assert.assertEquals(true, checkResults(EXPECTED_REVERSE_PATH));
-	}
-	public void TestPreClusterReversedGroupby() throws Exception{
-		conf.set(GenomixJob.GROUPBY_TYPE, "precluster");
-		conf.setBoolean(GenomixJob.REVERSED_KMER, true);
-		System.err.println("Testing PreclusterGroupBy + Reversed");
-		driver.runJob(new GenomixJob(conf), Plan.BUILD_DEBRUJIN_GRAPH, true);
-		Assert.assertEquals(true, checkResults(EXPECTED_REVERSE_PATH));
-	}
-	public void TestHybridReversedGroupby() throws Exception{
-		conf.set(GenomixJob.GROUPBY_TYPE, "hybrid");
-		conf.setBoolean(GenomixJob.REVERSED_KMER, true);
-		System.err.println("Testing HybridGroupBy + Reversed");
-		driver.runJob(new GenomixJob(conf), Plan.BUILD_DEBRUJIN_GRAPH, true);
-		Assert.assertEquals(true, checkResults(EXPECTED_REVERSE_PATH));
-	}
+    public void TestPreClusterGroupby() throws Exception {
+        conf.set(GenomixJob.GROUPBY_TYPE, "precluster");
+        System.err.println("Testing PreClusterGroupBy");
+        driver.runJob(new GenomixJob(conf), Plan.BUILD_DEBRUJIN_GRAPH, true);
+        Assert.assertEquals(true, checkResults(EXPECTED_PATH));
+    }
 
-	private boolean checkResults(String expectedPath) throws Exception {
-		File dumped = null;
-		String format = conf.get(GenomixJob.OUTPUT_FORMAT);
-		if ("text".equalsIgnoreCase(format)) {
-			FileUtil.copyMerge(FileSystem.get(conf),
-					new Path(HDFS_OUTPUT_PATH), FileSystem
-							.getLocal(new Configuration()), new Path(
-							DUMPED_RESULT), false, conf, null);
-			dumped = new File(DUMPED_RESULT);
-		} else {
-			
-			FileSystem.getLocal(new Configuration()).mkdirs(new Path(ACTUAL_RESULT_DIR
-			+ HDFS_OUTPUT_PATH));
-			File filePathTo = new File(CONVERT_RESULT);
-			BufferedWriter bw = new BufferedWriter(new FileWriter(filePathTo));
-			for (int i = 0; i < numPartitionPerMachine * numberOfNC; i++) {
-				String partname = "/part-" + i;
-				FileUtil.copy(FileSystem.get(conf), new Path(HDFS_OUTPUT_PATH						
-						+ partname), FileSystem.getLocal(new Configuration()),						
-						new Path(ACTUAL_RESULT_DIR + HDFS_OUTPUT_PATH + partname), false, conf);
-					
-				Path path = new Path(HDFS_OUTPUT_PATH
-						+ partname);
-				FileSystem dfs = FileSystem.get(conf);
-				if (dfs.getFileStatus(path).getLen() == 0){
-					continue;
-				}
-				SequenceFile.Reader reader = new SequenceFile.Reader(dfs, path,
-						conf);
-				BytesWritable key = (BytesWritable) ReflectionUtils
-						.newInstance(reader.getKeyClass(), conf);
-				KmerCountValue value = (KmerCountValue) ReflectionUtils
-						.newInstance(reader.getValueClass(), conf);
+    public void TestHybridGroupby() throws Exception {
+        conf.set(GenomixJob.GROUPBY_TYPE, "hybrid");
+        System.err.println("Testing HybridGroupBy");
+        driver.runJob(new GenomixJob(conf), Plan.BUILD_DEBRUJIN_GRAPH, true);
+        Assert.assertEquals(true, checkResults(EXPECTED_PATH));
+    }
 
-				int k = conf.getInt(GenomixJob.KMER_LENGTH, 25);
-				while (reader.next(key, value)) {
-					if (key == null || value == null){
-						break;
-					}
-					bw.write(Kmer.recoverKmerFrom(k, key.getBytes(), 0,
-							key.getLength())
-							+ "\t" + value.toString());
-					System.out.println(Kmer.recoverKmerFrom(k, key.getBytes(), 0,
-							key.getLength())
-							+ "\t" + value.toString());
-					bw.newLine();
-				}
-				reader.close();
+    public void TestExternalReversedGroupby() throws Exception {
+        conf.set(GenomixJob.GROUPBY_TYPE, "external");
+        conf.setBoolean(GenomixJob.REVERSED_KMER, true);
+        System.err.println("Testing ExternalGroupBy + Reversed");
+        driver.runJob(new GenomixJob(conf), Plan.BUILD_DEBRUJIN_GRAPH, true);
+        Assert.assertEquals(true, checkResults(EXPECTED_REVERSE_PATH));
+    }
 
-			}
-			bw.close();
-			dumped = new File(CONVERT_RESULT);
-		}
+    public void TestPreClusterReversedGroupby() throws Exception {
+        conf.set(GenomixJob.GROUPBY_TYPE, "precluster");
+        conf.setBoolean(GenomixJob.REVERSED_KMER, true);
+        System.err.println("Testing PreclusterGroupBy + Reversed");
+        driver.runJob(new GenomixJob(conf), Plan.BUILD_DEBRUJIN_GRAPH, true);
+        Assert.assertEquals(true, checkResults(EXPECTED_REVERSE_PATH));
+    }
 
-		TestUtils.compareWithSortedResult(new File(expectedPath), dumped);
-		return true;
-	}
+    public void TestHybridReversedGroupby() throws Exception {
+        conf.set(GenomixJob.GROUPBY_TYPE, "hybrid");
+        conf.setBoolean(GenomixJob.REVERSED_KMER, true);
+        System.err.println("Testing HybridGroupBy + Reversed");
+        driver.runJob(new GenomixJob(conf), Plan.BUILD_DEBRUJIN_GRAPH, true);
+        Assert.assertEquals(true, checkResults(EXPECTED_REVERSE_PATH));
+    }
 
-	@After
-	public void tearDown() throws Exception {
-		HyracksUtils.destroyApp(HYRACKS_APP_NAME);
-		HyracksUtils.deinit();
-		cleanupHDFS();
-	}
+    private boolean checkResults(String expectedPath) throws Exception {
+        File dumped = null;
+        String format = conf.get(GenomixJob.OUTPUT_FORMAT);
+        if ("text".equalsIgnoreCase(format)) {
+            FileUtil.copyMerge(FileSystem.get(conf), new Path(HDFS_OUTPUT_PATH),
+                    FileSystem.getLocal(new Configuration()), new Path(DUMPED_RESULT), false, conf, null);
+            dumped = new File(DUMPED_RESULT);
+        } else {
 
-	private void cleanupHDFS() throws Exception {
-		dfsCluster.shutdown();
-	}
+            FileSystem.getLocal(new Configuration()).mkdirs(new Path(ACTUAL_RESULT_DIR + HDFS_OUTPUT_PATH));
+            File filePathTo = new File(CONVERT_RESULT);
+            BufferedWriter bw = new BufferedWriter(new FileWriter(filePathTo));
+            for (int i = 0; i < numPartitionPerMachine * numberOfNC; i++) {
+                String partname = "/part-" + i;
+                //				FileUtil.copy(FileSystem.get(conf), new Path(HDFS_OUTPUT_PATH
+                //						+ partname), FileSystem.getLocal(new Configuration()),
+                //						new Path(ACTUAL_RESULT_DIR + HDFS_OUTPUT_PATH + partname), false, conf);
+
+                Path path = new Path(HDFS_OUTPUT_PATH + partname);
+                FileSystem dfs = FileSystem.get(conf);
+                if (dfs.getFileStatus(path).getLen() == 0) {
+                    continue;
+                }
+                SequenceFile.Reader reader = new SequenceFile.Reader(dfs, path, conf);
+                
+//                KmerBytesWritable key = (KmerBytesWritable) ReflectionUtils.newInstance(reader.getKeyClass(), conf);
+                KmerBytesWritable key = new KmerBytesWritable(conf.getInt(GenomixJob.KMER_LENGTH, GenomixJob.DEFAULT_KMER));
+                KmerCountValue value = (KmerCountValue) ReflectionUtils.newInstance(reader.getValueClass(), conf);
+
+                while (reader.next(key, value)) {
+                    if (key == null || value == null) {
+                        break;
+                    }
+                    bw.write(key.toString() + "\t" + value.toString());
+                    System.out.println(key.toString() + "\t" + value.toString());
+                    bw.newLine();
+                }
+                reader.close();
+            }
+            bw.close();
+            dumped = new File(CONVERT_RESULT);
+        }
+
+        TestUtils.compareWithSortedResult(new File(expectedPath), dumped);
+        return true;
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        edu.uci.ics.hyracks.hdfs.utils.HyracksUtils.deinit();
+        cleanupHDFS();
+    }
+
+    private void cleanupHDFS() throws Exception {
+        dfsCluster.shutdown();
+    }
 
 }
diff --git a/genomix/genomix-hyracks/src/test/java/edu/uci/ics/genomix/example/jobrun/TestUtils.java b/genomix/genomix-hyracks/src/test/java/edu/uci/ics/genomix/example/jobrun/TestUtils.java
new file mode 100644
index 0000000..22688e0
--- /dev/null
+++ b/genomix/genomix-hyracks/src/test/java/edu/uci/ics/genomix/example/jobrun/TestUtils.java
@@ -0,0 +1,132 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.genomix.example.jobrun;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.util.ArrayList;
+import java.util.Collections;
+
+public class TestUtils {
+    /**
+     * Compare with the sorted expected file.
+     * The actual file may not be sorted; 
+     * @param expectedFile
+     * @param actualFile
+     */
+    public static void compareWithSortedResult(File expectedFile, File actualFile) throws Exception{
+        BufferedReader readerActual = new BufferedReader(new FileReader(actualFile));
+        BufferedReader readerExpected = new BufferedReader(new FileReader(expectedFile));
+        ArrayList<String> actualLines = new ArrayList<String>();
+        String lineExpected, lineActual;
+        try{
+                while ( (lineActual = readerActual.readLine())!=null){
+                        actualLines.add(lineActual);
+                }
+                Collections.sort(actualLines);
+                int num = 1;
+                for(String actualLine : actualLines){
+                        lineExpected = readerExpected.readLine();
+                        if (lineExpected == null){
+                                throw new Exception("Actual result changed at line " + num + ":\n< " + actualLine + "\n> ");
+                        }
+                        if ( !equalStrings(lineExpected, actualLine)){
+                                   throw new Exception("Result for changed at line " + num + ":\n< " + lineExpected + "\n> "
+                               + actualLine);
+                        }
+                ++num;
+                }
+                lineExpected = readerExpected.readLine();
+                if (lineExpected != null) {
+                    throw new Exception("Actual result changed at line " + num + ":\n< \n> " + lineExpected);
+                }
+        } finally{
+                readerActual.close();
+                readerExpected.close();
+        }
+    }
+
+    public static void compareWithResult(File expectedFile, File actualFile) throws Exception {
+        BufferedReader readerExpected = new BufferedReader(new FileReader(expectedFile));
+        BufferedReader readerActual = new BufferedReader(new FileReader(actualFile));
+        String lineExpected, lineActual;
+        int num = 1;
+        try {
+            while ((lineExpected = readerExpected.readLine()) != null) {
+                lineActual = readerActual.readLine();
+                // Assert.assertEquals(lineExpected, lineActual);
+                if (lineActual == null) {
+                    throw new Exception("Actual result changed at line " + num + ":\n< " + lineExpected + "\n> ");
+                }
+                if (!equalStrings(lineExpected, lineActual)) {
+                    throw new Exception("Result for changed at line " + num + ":\n< " + lineExpected + "\n> "
+                            + lineActual);
+                }
+                ++num;
+            }
+            lineActual = readerActual.readLine();
+            if (lineActual != null) {
+                throw new Exception("Actual result changed at line " + num + ":\n< \n> " + lineActual);
+            }
+        } finally {
+            readerExpected.close();
+            readerActual.close();
+        }
+    }
+
+    private static boolean equalStrings(String s1, String s2) {
+        String[] rowsOne = s1.split("\n");
+        String[] rowsTwo = s2.split("\n");
+
+        if (rowsOne.length != rowsTwo.length)
+            return false;
+
+        for (int i = 0; i < rowsOne.length; i++) {
+            String row1 = rowsOne[i];
+            String row2 = rowsTwo[i];
+
+            if (row1.equals(row2))
+                continue;
+
+            String[] fields1 = row1.split(",");
+            String[] fields2 = row2.split(",");
+
+            for (int j = 0; j < fields1.length; j++) {
+                if (fields1[j].equals(fields2[j])) {
+                    continue;
+                } else if (fields1[j].indexOf('.') < 0) {
+                    return false;
+                } else {
+                    fields1[j] = fields1[j].split("=")[1];
+                    fields2[j] = fields2[j].split("=")[1];
+                    Double double1 = Double.parseDouble(fields1[j]);
+                    Double double2 = Double.parseDouble(fields2[j]);
+                    float float1 = (float) double1.doubleValue();
+                    float float2 = (float) double2.doubleValue();
+
+                    if (Math.abs(float1 - float2) == 0)
+                        continue;
+                    else {
+                        return false;
+                    }
+                }
+            }
+        }
+        return true;
+    }
+
+}
diff --git a/genomix/genomix-pregelix/data/webmap/part-1-out-100000 b/genomix/genomix-pregelix/data/webmap/part-1-out-100000
deleted file mode 100755
index 99d2fac..0000000
--- a/genomix/genomix-pregelix/data/webmap/part-1-out-100000
+++ /dev/null
Binary files differ
diff --git a/genomix/genomix-pregelix/data/webmap/part-1-out-200000 b/genomix/genomix-pregelix/data/webmap/part-1-out-200000
deleted file mode 100755
index 86413de..0000000
--- a/genomix/genomix-pregelix/data/webmap/part-1-out-200000
+++ /dev/null
Binary files differ
diff --git a/genomix/genomix-pregelix/data/webmap/part-1-out-25000 b/genomix/genomix-pregelix/data/webmap/part-1-out-25000
deleted file mode 100755
index 079f915..0000000
--- a/genomix/genomix-pregelix/data/webmap/part-1-out-25000
+++ /dev/null
Binary files differ
diff --git a/genomix/genomix-pregelix/data/webmap/part-1-out-50000 b/genomix/genomix-pregelix/data/webmap/part-1-out-50000
deleted file mode 100755
index d292c19..0000000
--- a/genomix/genomix-pregelix/data/webmap/part-1-out-50000
+++ /dev/null
Binary files differ
diff --git a/genomix/genomix-pregelix/data/webmap/part-1-out-500000 b/genomix/genomix-pregelix/data/webmap/part-1-out-500000
deleted file mode 100755
index 01fdc9e..0000000
--- a/genomix/genomix-pregelix/data/webmap/part-1-out-500000
+++ /dev/null
Binary files differ
diff --git a/genomix/genomix-pregelix/data/webmap/sequenceFileLongMergeTest b/genomix/genomix-pregelix/data/webmap/sequenceFileLongMergeTest
deleted file mode 100755
index ff27c48..0000000
--- a/genomix/genomix-pregelix/data/webmap/sequenceFileLongMergeTest
+++ /dev/null
Binary files differ
diff --git a/genomix/genomix-pregelix/data/webmap/sequenceFileMergeTest b/genomix/genomix-pregelix/data/webmap/sequenceFileMergeTest
deleted file mode 100755
index b50d3f1..0000000
--- a/genomix/genomix-pregelix/data/webmap/sequenceFileMergeTest
+++ /dev/null
Binary files differ
diff --git a/genomix/genomix-pregelix/data/webmap/sequenceShortFileMergeTest b/genomix/genomix-pregelix/data/webmap/sequenceShortFileMergeTest
deleted file mode 100755
index 96f7fc9..0000000
--- a/genomix/genomix-pregelix/data/webmap/sequenceShortFileMergeTest
+++ /dev/null
Binary files differ
diff --git a/genomix/genomix-pregelix/pom.xml b/genomix/genomix-pregelix/pom.xml
index c429105..4a810b7 100644
--- a/genomix/genomix-pregelix/pom.xml
+++ b/genomix/genomix-pregelix/pom.xml
@@ -4,7 +4,7 @@
   <groupId>edu.uci.ics.pregelix</groupId>
   <artifactId>genomix-pregelix</artifactId>
   <packaging>jar</packaging>
-  <version>0.2.4-SNAPSHOT</version>
+  <version>0.2.5-SNAPSHOT</version>
   <name>genomix-pregelix</name>
 
   <properties>
@@ -124,14 +124,14 @@
                 <dependency>
                 	<groupId>edu.uci.ics.hyracks</groupId>
                 	<artifactId>pregelix-core</artifactId>
-                	<version>0.2.4-SNAPSHOT</version>
+                	<version>0.2.5-SNAPSHOT</version>
                 	<type>jar</type>
                 	<scope>compile</scope>
                 </dependency>
                  <dependency>
                 	<groupId>edu.uci.ics.hyracks</groupId>
                 	<artifactId>genomix-data</artifactId>
-                	<version>0.2.4-SNAPSHOT</version>
+                	<version>0.2.5-SNAPSHOT</version>
                 	<type>jar</type>
                 	<scope>compile</scope>
                 </dependency>
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/GraphVertexOperation.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/GraphVertexOperation.java
index 6a5299b..553de45 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/GraphVertexOperation.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/GraphVertexOperation.java
@@ -2,8 +2,8 @@
 
 import org.apache.hadoop.io.BytesWritable;
 
-import edu.uci.ics.genomix.type.Kmer;
-import edu.uci.ics.genomix.type.KmerUtil;
+import edu.uci.ics.genomix.type.old.Kmer;
+import edu.uci.ics.genomix.type.old.KmerUtil;
 
 public class GraphVertexOperation {
 	
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/LoadGraphVertex.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/LoadGraphVertex.java
index e22b20d..580e1fe 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/LoadGraphVertex.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/LoadGraphVertex.java
@@ -49,6 +49,7 @@
 	 */
 	@Override
 	public void compute(Iterator<MessageWritable> msgIterator) {
+		deleteVertex(getVertexId());
 		voteToHalt();
 	}
 
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/LogAlgorithmForMergeGraphVertex.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/LogAlgorithmForMergeGraphVertex.java
index 757d8f8..88c5c35 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/LogAlgorithmForMergeGraphVertex.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/LogAlgorithmForMergeGraphVertex.java
@@ -14,8 +14,8 @@
 import edu.uci.ics.genomix.pregelix.io.ValueStateWritable;
 import edu.uci.ics.genomix.pregelix.type.Message;
 import edu.uci.ics.genomix.pregelix.type.State;
-import edu.uci.ics.genomix.type.Kmer;
-import edu.uci.ics.genomix.type.KmerUtil;
+import edu.uci.ics.genomix.type.old.Kmer;
+import edu.uci.ics.genomix.type.old.KmerUtil;
 
 /*
  * vertexId: BytesWritable
@@ -45,9 +45,11 @@
  * The succeed node and precursor node will be stored in vertexValue and we don't use edgeValue.
  * The details about message are in edu.uci.ics.pregelix.example.io.MessageWritable. 
  */
-public class LogAlgorithmForMergeGraphVertex extends Vertex<BytesWritable, ValueStateWritable, NullWritable, LogAlgorithmMessageWritable>{
+public class LogAlgorithmForMergeGraphVertex extends Vertex<BytesWritable, ValueStateWritable, NullWritable, LogAlgorithmMessageWritable>{	
 	public static final String KMER_SIZE = "LogAlgorithmForMergeGraphVertex.kmerSize";
+	public static final String ITERATIONS = "MergeGraphVertex.iteration";
 	public static int kmerSize = -1;
+	private int maxIteration = -1;
 	
 	private byte[] tmpVertexId;
 	private byte[] tmpDestVertexId;
@@ -60,18 +62,15 @@
 	/**
 	 * Log Algorithm for path merge graph
 	 */
-	
 	/**
-     *	Load KmerSize
+     *	Load KmerSize, MaxIteration
      */
-	public LogAlgorithmForMergeGraphVertex(){
-		
-	}
-	
 	@Override
 	public void compute(Iterator<LogAlgorithmMessageWritable> msgIterator) {
 		if(kmerSize == -1)
 			kmerSize = getContext().getConfiguration().getInt(KMER_SIZE, 5);
+        if (maxIteration < 0)
+            maxIteration = getContext().getConfiguration().getInt(ITERATIONS, 100);
 		tmpVertexId = GraphVertexOperation.generateValidDataFromBytesWritable(getVertexId());
 		tmpVal = getVertexValue();
 		if (getSuperstep() == 1) {
@@ -103,12 +102,12 @@
 				tmpVal.setState(State.MID_VERTEX);
 				setVertexValue(tmpVal);
 			}
-			if(!GraphVertexOperation.isHeadVertex(tmpVal.getValue())
+			/*if(!GraphVertexOperation.isHeadVertex(tmpVal.getValue())
 					&& !GraphVertexOperation.isRearVertex(tmpVal.getValue())
 					&& !GraphVertexOperation.isRearVertex(tmpVal.getValue()))
-				voteToHalt();
+				voteToHalt();*/
 		}
-		else if(getSuperstep() == 2){
+		else if(getSuperstep() == 2 && getSuperstep() <= maxIteration){
 			while(msgIterator.hasNext()){
 				if(!GraphVertexOperation.isPathVertex(tmpVal.getValue())){
 					msgIterator.next();
@@ -116,7 +115,8 @@
 				}
 				else{
 					tmpMsg = msgIterator.next();
-					if(tmpMsg.getMessage() == Message.START && tmpVal.getState() == State.MID_VERTEX){
+					if(tmpMsg.getMessage() == Message.START && 
+							(tmpVal.getState() == State.MID_VERTEX || tmpVal.getState() == State.END_VERTEX)){
 						tmpVal.setState(State.START_VERTEX);
 						setVertexValue(tmpVal);
 					}
@@ -131,43 +131,18 @@
 			}
 		}
 		//head node sends message to path node
-		else if(getSuperstep()%3 == 0){
-			if(getSuperstep() == 3){
-				tmpMsg = new LogAlgorithmMessageWritable();
-				if(Kmer.GENE_CODE.getGeneCodeFromBitMap((byte)(tmpVal.getValue() & 0x0F)) == -1)
-					voteToHalt();
-				else{
-					tmpDestVertexId = KmerUtil.shiftKmerWithNextCode(kmerSize, tmpVertexId, 
-							0, tmpVertexId.length, 
-							Kmer.GENE_CODE.getGeneCodeFromBitMap((byte)(tmpVal.getValue() & 0x0F)));
-					destVertexId.set(tmpDestVertexId, 0, tmpDestVertexId.length);
-					if(tmpVal.getState() == State.START_VERTEX){
-						tmpMsg.setMessage(Message.START);
-						tmpMsg.setSourceVertexId(getVertexId().getBytes());
-						sendMsg(destVertexId, tmpMsg);
-						voteToHalt();
-					}
-					else if(tmpVal.getState() != State.END_VERTEX && tmpVal.getState() != State.FINAL_DELETE){
-						tmpMsg.setMessage(Message.NON);
-						tmpMsg.setSourceVertexId(getVertexId().getBytes());
-						sendMsg(destVertexId,tmpMsg);
-						voteToHalt();
-					}
-				}
-			}
+		else if(getSuperstep()%3 == 0 && getSuperstep() <= maxIteration){
+			if(tmpVal.getState() == State.TODELETE || tmpVal.getState() == State.KILL_SELF)
+				voteToHalt();
 			else{
-				if(msgIterator.hasNext()){
-					tmpMsg = msgIterator.next();
-					byte[] lastKmer = KmerUtil.getLastKmerFromChain(kmerSize,
-							tmpVal.getLengthOfMergeChain(),
-							tmpVal.getMergeChain(),
-							0, tmpVal.getMergeChain().length);
+				if(getSuperstep() == 3){
+					tmpMsg = new LogAlgorithmMessageWritable();
 					if(Kmer.GENE_CODE.getGeneCodeFromBitMap((byte)(tmpVal.getValue() & 0x0F)) == -1)
 						voteToHalt();
 					else{
-						tmpDestVertexId = KmerUtil.shiftKmerWithNextCode(kmerSize, lastKmer, 
-								0, lastKmer.length,
-								Kmer.GENE_CODE.getGeneCodeFromBitMap((byte)(tmpVal.getValue() & 0x0F))); //tmpMsg.getNeighberInfo()
+						tmpDestVertexId = KmerUtil.shiftKmerWithNextCode(kmerSize, tmpVertexId, 
+								0, tmpVertexId.length, 
+								Kmer.GENE_CODE.getGeneCodeFromBitMap((byte)(tmpVal.getValue() & 0x0F)));
 						destVertexId.set(tmpDestVertexId, 0, tmpDestVertexId.length);
 						if(tmpVal.getState() == State.START_VERTEX){
 							tmpMsg.setMessage(Message.START);
@@ -179,6 +154,35 @@
 							tmpMsg.setMessage(Message.NON);
 							tmpMsg.setSourceVertexId(getVertexId().getBytes());
 							sendMsg(destVertexId,tmpMsg);
+							voteToHalt();
+						}
+					}
+				}
+				else{
+					if(msgIterator.hasNext()){
+						tmpMsg = msgIterator.next();
+						byte[] lastKmer = KmerUtil.getLastKmerFromChain(kmerSize,
+								tmpVal.getLengthOfMergeChain(),
+								tmpVal.getMergeChain(),
+								0, tmpVal.getMergeChain().length);
+						if(Kmer.GENE_CODE.getGeneCodeFromBitMap((byte)(tmpVal.getValue() & 0x0F)) == -1 || lastKmer == null)
+							voteToHalt();
+						else{
+							tmpDestVertexId = KmerUtil.shiftKmerWithNextCode(kmerSize, lastKmer, 
+									0, lastKmer.length,
+									Kmer.GENE_CODE.getGeneCodeFromBitMap((byte)(tmpVal.getValue() & 0x0F))); 
+							destVertexId.set(tmpDestVertexId, 0, tmpDestVertexId.length);
+							if(tmpVal.getState() == State.START_VERTEX){
+								tmpMsg.setMessage(Message.START);
+								tmpMsg.setSourceVertexId(getVertexId().getBytes());
+								sendMsg(destVertexId, tmpMsg);
+								voteToHalt();
+							}
+							else if(tmpVal.getState() != State.END_VERTEX && tmpVal.getState() != State.FINAL_DELETE){
+								tmpMsg.setMessage(Message.NON);
+								tmpMsg.setSourceVertexId(getVertexId().getBytes());
+								sendMsg(destVertexId,tmpMsg);
+							}
 						}
 					}
 				}
@@ -186,48 +190,56 @@
 		}
 		
 		//path node sends message back to head node
-		else if(getSuperstep()%3 == 1){
-			if(msgIterator.hasNext()){
-				tmpMsg = msgIterator.next();
-				int message = tmpMsg.getMessage();
-				if(tmpVal.getLengthOfMergeChain() == 0){
-					tmpVal.setLengthOfMergeChain(kmerSize);
-					tmpVal.setMergeChain(tmpVertexId);
-					setVertexValue(tmpVal);
-				}
-				tmpMsg.setLengthOfChain(tmpVal.getLengthOfMergeChain());
-				tmpMsg.setChainVertexId(tmpVal.getMergeChain());
-				
-				tmpMsg.setNeighberInfo(tmpVal.getValue()); //set neighber
-				tmpMsg.setSourceVertexState(tmpVal.getState());
-				
-				//kill Message because it has been merged by the head
-				if(tmpVal.getState() == State.END_VERTEX || tmpVal.getState() == State.FINAL_DELETE){
-					tmpMsg.setMessage(Message.END);
-					tmpVal.setState(State.FINAL_DELETE);
-					setVertexValue(tmpVal);
-					//deleteVertex(getVertexId());
-				}
-				else
-					tmpMsg.setMessage(Message.NON);
-				
-				if(message == Message.START){
-					tmpVal.setState(State.TODELETE);
-					setVertexValue(tmpVal);
-				}
-				destVertexId.set(tmpMsg.getSourceVertexId(), 0, tmpMsg.getSourceVertexId().length);
-				sendMsg(destVertexId,tmpMsg);
+		else if(getSuperstep()%3 == 1 && getSuperstep() <= maxIteration){
+			if(tmpVal.getState() == State.TODELETE || tmpVal.getState() == State.KILL_SELF)
 				voteToHalt();
-			}
 			else{
-				if(getVertexValue().getState() != State.START_VERTEX
-						&& getVertexValue().getState() != State.END_VERTEX && getVertexValue().getState() != State.FINAL_DELETE)
-					deleteVertex(getVertexId()); //killSelf because it doesn't receive any message
+				if(msgIterator.hasNext()){
+					tmpMsg = msgIterator.next();
+					int message = tmpMsg.getMessage();
+					if(tmpVal.getLengthOfMergeChain() == 0){
+						tmpVal.setLengthOfMergeChain(kmerSize);
+						tmpVal.setMergeChain(tmpVertexId);
+						setVertexValue(tmpVal);
+					}
+					tmpMsg.setLengthOfChain(tmpVal.getLengthOfMergeChain());
+					tmpMsg.setChainVertexId(tmpVal.getMergeChain());
+					
+					tmpMsg.setNeighberInfo(tmpVal.getValue()); //set neighber
+					tmpMsg.setSourceVertexState(tmpVal.getState());
+					
+					//kill Message because it has been merged by the head
+					if(tmpVal.getState() == State.END_VERTEX || tmpVal.getState() == State.FINAL_DELETE){
+						tmpMsg.setMessage(Message.END);
+						tmpVal.setState(State.FINAL_DELETE);
+						setVertexValue(tmpVal);
+						//deleteVertex(getVertexId());
+					}
+					else
+						tmpMsg.setMessage(Message.NON);
+					
+					if(message == Message.START){
+						tmpVal.setState(State.TODELETE);
+						setVertexValue(tmpVal);
+					}
+					destVertexId.set(tmpMsg.getSourceVertexId(), 0, tmpMsg.getSourceVertexId().length);
+					sendMsg(destVertexId,tmpMsg);
+					//voteToHalt();
+				}
+				else{
+					if(getVertexValue().getState() != State.START_VERTEX //&& getVertexValue().getState() != State.NON_EXIST
+							&& getVertexValue().getState() != State.END_VERTEX && getVertexValue().getState() != State.FINAL_DELETE){
+						tmpVal.setState(State.KILL_SELF);
+						setVertexValue(tmpVal);
+						voteToHalt();
+						//deleteVertex(getVertexId()); //killSelf because it doesn't receive any message
+					}
+				}
 			}
 		}
-		else if(getSuperstep()%3 == 2){
-			if(tmpVal.getState() == State.TODELETE)
-				deleteVertex(getVertexId()); //killSelf
+		else if(getSuperstep()%3 == 2 && getSuperstep() <= maxIteration){
+			if(tmpVal.getState() == State.TODELETE || tmpVal.getState() == State.KILL_SELF)
+				voteToHalt(); //deleteVertex(getVertexId()); //killSelf
 			else{
 				if(msgIterator.hasNext()){
 					tmpMsg = msgIterator.next();
@@ -275,7 +287,6 @@
 					voteToHalt();
 				}
 			}
-			
 		}
 	}
 
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/MergeGraphVertex.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/MergeGraphVertex.java
index 12450b4..ec45019 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/MergeGraphVertex.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/MergeGraphVertex.java
@@ -2,14 +2,11 @@
 
 import java.util.Iterator;
 
-import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.io.NullWritable;
-import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
-import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
 
-import edu.uci.ics.genomix.type.Kmer;
-import edu.uci.ics.genomix.type.KmerUtil;
+import edu.uci.ics.genomix.type.old.Kmer;
+import edu.uci.ics.genomix.type.old.KmerUtil;
 import edu.uci.ics.pregelix.api.graph.Vertex;
 import edu.uci.ics.pregelix.api.job.PregelixJob;
 import edu.uci.ics.genomix.pregelix.client.Client;
@@ -50,7 +47,9 @@
 public class MergeGraphVertex extends Vertex<BytesWritable, ValueStateWritable, NullWritable, MessageWritable>{
 	
 	public static final String KMER_SIZE = "MergeGraphVertex.kmerSize";
+	public static final String ITERATIONS = "MergeGraphVertex.iteration";
 	public static int kmerSize = -1;
+	private int maxIteration = -1;
 	
     private byte[] tmpVertexId;
     private byte[] tmpDestVertexId;
@@ -63,14 +62,15 @@
 	 * @throws Exception 
 	 * @throws  
 	 */
-	
 	/**
-     *	Load KmerSize
+     *	Load KmerSize, MaxIteration
      */
 	@Override
 	public void compute(Iterator<MessageWritable> msgIterator) {
 		if(kmerSize == -1)
 			kmerSize = getContext().getConfiguration().getInt(KMER_SIZE, 5);
+        if (maxIteration < 0) 
+            maxIteration = getContext().getConfiguration().getInt(ITERATIONS, 100);
 		tmpVertexId = GraphVertexOperation.generateValidDataFromBytesWritable(getVertexId());
 		if (getSuperstep() == 1) {
 			if(GraphVertexOperation.isHeadVertex(getVertexValue().getValue())){ 
@@ -89,8 +89,7 @@
 		}
 		
 		//path node sends message back to head node
-		else if(getSuperstep()%2 == 0){
-			
+		else if(getSuperstep()%2 == 0 && getSuperstep() <= maxIteration){
 			 if(msgIterator.hasNext()){
 				tmpMsg = msgIterator.next();
 					
@@ -147,7 +146,7 @@
 			}
 		}
 		//head node sends message to path node
-		else if(getSuperstep()%2 == 1){
+		else if(getSuperstep()%2 == 1 && getSuperstep() <= maxIteration){
 			while (msgIterator.hasNext()){
 				tmpMsg = msgIterator.next();
 				if(!tmpMsg.isRear()){
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/client/Client.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/client/Client.java
index ab0fb57..2d70fdf 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/client/Client.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/client/Client.java
@@ -36,6 +36,9 @@
         
         @Option(name = "-kmer-size", usage = "the size of kmer", required = false)
         public int sizeKmer;
+        
+        @Option(name = "-num-iteration", usage = "max number of iterations, for pagerank job only", required = false)
+        public long numIteration = -1;
 
         @Option(name = "-runtime-profiling", usage = "whether to do runtime profifling", required = false)
         public String profiling = "false";
@@ -59,6 +62,10 @@
         FileOutputFormat.setOutputPath(job, new Path(options.outputPath));
         job.getConfiguration().setInt(MergeGraphVertex.KMER_SIZE, options.sizeKmer);
         job.getConfiguration().setInt(LogAlgorithmForMergeGraphVertex.KMER_SIZE, options.sizeKmer);
+        if (options.numIteration > 0){
+            job.getConfiguration().setLong(MergeGraphVertex.ITERATIONS, options.numIteration);
+            //job.getConfiguration().setLong(LogAlgorithmForMergeGraphVertex.ITERATIONS, options.numIteration);
+        }
         return options;
     }
 
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/format/LogAlgorithmForMergeGraphOutputFormat.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/format/LogAlgorithmForMergeGraphOutputFormat.java
index aa81066..865a787 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/format/LogAlgorithmForMergeGraphOutputFormat.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/format/LogAlgorithmForMergeGraphOutputFormat.java
@@ -7,11 +7,13 @@
 import org.apache.hadoop.mapreduce.RecordWriter;
 import org.apache.hadoop.mapreduce.TaskAttemptContext;
 
+import edu.uci.ics.genomix.pregelix.GraphVertexOperation;
 import edu.uci.ics.genomix.pregelix.api.io.binary.BinaryVertexOutputFormat;
 import edu.uci.ics.pregelix.api.graph.Vertex;
 import edu.uci.ics.pregelix.api.io.VertexWriter;
 import edu.uci.ics.genomix.pregelix.io.ValueStateWritable;
 import edu.uci.ics.genomix.pregelix.type.State;
+import edu.uci.ics.genomix.type.old.Kmer;
 
 public class LogAlgorithmForMergeGraphOutputFormat extends 
 	BinaryVertexOutputFormat<BytesWritable, ValueStateWritable, NullWritable> {
@@ -37,7 +39,10 @@
             @Override
             public void writeVertex(Vertex<BytesWritable, ValueStateWritable, NullWritable, ?> vertex) throws IOException,
                     InterruptedException {
-            	if(vertex.getVertexValue().getState() != State.FINAL_DELETE)
+            	if(vertex.getVertexValue().getState() != State.FINAL_DELETE
+            			&& vertex.getVertexValue().getState() != State.END_VERTEX
+            			&& vertex.getVertexValue().getState() != State.TODELETE
+            			&& vertex.getVertexValue().getState() != State.KILL_SELF)
                     getRecordWriter().write(vertex.getVertexId(),vertex.getVertexValue());
             }
         }
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/io/LogAlgorithmMessageWritable.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/io/LogAlgorithmMessageWritable.java
index 42f1269..3d07c5b 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/io/LogAlgorithmMessageWritable.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/io/LogAlgorithmMessageWritable.java
@@ -122,7 +122,7 @@
 	public void readFields(DataInput in) throws IOException {
 		// TODO Auto-generated method stub
 		lengthOfChain = in.readInt();
-		if(lengthOfChain != 0){
+		if(lengthOfChain > 0){
 			chainVertexId = new byte[(lengthOfChain-1)/4 + 1];
 			in.readFully(chainVertexId);
 		}
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/io/MessageWritable.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/io/MessageWritable.java
index 2976c87..3872514 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/io/MessageWritable.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/io/MessageWritable.java
@@ -113,7 +113,7 @@
 	public void readFields(DataInput in) throws IOException {
 		// TODO Auto-generated method stub
 		lengthOfChain = in.readInt();
-		if(lengthOfChain != 0){
+		if(lengthOfChain > 0){
 			chainVertexId = new byte[(lengthOfChain-1)/4 + 1];
 			in.readFully(chainVertexId);
 		}
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/io/ValueStateWritable.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/io/ValueStateWritable.java
index 9acda4e..ffc1d38 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/io/ValueStateWritable.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/io/ValueStateWritable.java
@@ -5,6 +5,7 @@
 import org.apache.hadoop.io.WritableComparable;
 
 import edu.uci.ics.genomix.pregelix.type.State;
+import edu.uci.ics.genomix.type.old.Kmer;
 
 
 public class ValueStateWritable implements WritableComparable<ValueStateWritable> {
@@ -63,6 +64,8 @@
 		value = in.readByte();
 		state = in.readInt();
 		lengthOfMergeChain = in.readInt();
+		if(lengthOfMergeChain < 0)
+			System.out.println();
 		if(lengthOfMergeChain != 0){
 			mergeChain = new byte[(lengthOfMergeChain-1)/4 + 1];
 			in.readFully(mergeChain);
@@ -86,4 +89,14 @@
 		return 0;
 	}
 	
+	@Override
+	public String toString() {
+		if(lengthOfMergeChain == 0)
+			return Kmer.GENE_CODE.getSymbolFromBitMap(value);
+		return 	Kmer.GENE_CODE.getSymbolFromBitMap(value) + "\t" +
+				lengthOfMergeChain + "\t" +
+				Kmer.recoverKmerFrom(lengthOfMergeChain, mergeChain, 0, mergeChain.length) + "\t" +
+				state;
+	}
+	
 }
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/log/DataLoadLogFormatter.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/log/DataLoadLogFormatter.java
index f5ddfc6..7e56a66 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/log/DataLoadLogFormatter.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/log/DataLoadLogFormatter.java
@@ -6,7 +6,7 @@
 
 import org.apache.hadoop.io.BytesWritable;
 
-import edu.uci.ics.genomix.type.Kmer;
+import edu.uci.ics.genomix.type.old.Kmer;
 import edu.uci.ics.genomix.type.KmerCountValue;
 
 public class DataLoadLogFormatter extends Formatter{
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/log/LogAlgorithmLogFormatter.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/log/LogAlgorithmLogFormatter.java
index e0d241a..3af9b6f 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/log/LogAlgorithmLogFormatter.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/log/LogAlgorithmLogFormatter.java
@@ -5,7 +5,7 @@
 import edu.uci.ics.genomix.pregelix.io.LogAlgorithmMessageWritable;
 import edu.uci.ics.genomix.pregelix.type.Message;
 import edu.uci.ics.genomix.pregelix.type.State;
-import edu.uci.ics.genomix.type.Kmer;
+import edu.uci.ics.genomix.type.old.Kmer;
 
 public class LogAlgorithmLogFormatter extends Formatter {
 	//
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/log/NaiveAlgorithmLogFormatter.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/log/NaiveAlgorithmLogFormatter.java
index ef0d96f..c337a16 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/log/NaiveAlgorithmLogFormatter.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/log/NaiveAlgorithmLogFormatter.java
@@ -3,7 +3,7 @@
 import java.util.logging.*;
 
 import edu.uci.ics.genomix.pregelix.io.MessageWritable;
-import edu.uci.ics.genomix.type.Kmer;
+import edu.uci.ics.genomix.type.old.Kmer;
 
 public class NaiveAlgorithmLogFormatter extends Formatter {
 	//
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/sequencefile/CombineSequenceFile.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/sequencefile/CombineSequenceFile.java
index 8924302..d9f0efe 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/sequencefile/CombineSequenceFile.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/sequencefile/CombineSequenceFile.java
@@ -9,7 +9,7 @@
 import org.apache.hadoop.io.SequenceFile;
 import org.apache.hadoop.io.SequenceFile.CompressionType;
 
-import edu.uci.ics.genomix.type.Kmer;
+import edu.uci.ics.genomix.type.old.Kmer;
 import edu.uci.ics.genomix.type.KmerCountValue;
 
 
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/sequencefile/GenerateTextFile.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/sequencefile/GenerateTextFile.java
new file mode 100644
index 0000000..18214a8
--- /dev/null
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/sequencefile/GenerateTextFile.java
@@ -0,0 +1,50 @@
+package edu.uci.ics.genomix.pregelix.sequencefile;
+
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.io.BytesWritable;
+import org.apache.hadoop.io.SequenceFile;
+
+import edu.uci.ics.genomix.pregelix.io.ValueStateWritable;
+import edu.uci.ics.genomix.type.old.Kmer;
+
+public class GenerateTextFile {
+
+	public static void generate() throws IOException{
+		BufferedWriter bw = new BufferedWriter(new FileWriter("text/new_SimplePath"));
+		Configuration conf = new Configuration();
+		FileSystem fileSys = FileSystem.get(conf);
+		for(int i = 0; i < 2; i++){
+			Path path = new Path("output/part-" + i);
+			SequenceFile.Reader reader = new SequenceFile.Reader(fileSys, path, conf);
+		    BytesWritable key = new BytesWritable();
+		    ValueStateWritable value = new ValueStateWritable();
+		    
+		    while(reader.next(key, value)){
+				if (key == null || value == null){
+					break;
+				}
+				bw.write(Kmer.recoverKmerFrom(5, key.getBytes(), 0,
+						key.getLength())
+						+ "\t" + value.toString());
+				bw.newLine();
+		    }
+		    reader.close();
+		}
+		bw.close();
+	}
+	/**
+	 * @param args
+	 * @throws IOException 
+	 */
+	public static void main(String[] args) throws IOException {
+		// TODO Auto-generated method stub
+		generate();
+	}
+
+}
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/sequencefile/generateSmallFile.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/sequencefile/generateSmallFile.java
deleted file mode 100644
index 45329d0..0000000
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/sequencefile/generateSmallFile.java
+++ /dev/null
@@ -1,48 +0,0 @@
-package edu.uci.ics.genomix.pregelix.sequencefile;
-
-import java.io.IOException;
-
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.fs.FileSystem;
-import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.io.BytesWritable;
-import org.apache.hadoop.io.SequenceFile;
-import org.apache.hadoop.io.SequenceFile.CompressionType;
-
-import edu.uci.ics.genomix.type.KmerCountValue;
-
-public class generateSmallFile {
-
-	public static void generateNumOfLinesFromBigFile(Path inFile, Path outFile, int numOfLines) throws IOException{
-		Configuration conf = new Configuration();
-		FileSystem fileSys = FileSystem.get(conf);
-
-		SequenceFile.Reader reader = new SequenceFile.Reader(fileSys, inFile, conf);
-	    SequenceFile.Writer writer = SequenceFile.createWriter(fileSys, conf,
-	         outFile, BytesWritable.class, KmerCountValue.class, 
-	         CompressionType.NONE);
-	    BytesWritable outKey = new BytesWritable();
-	    KmerCountValue outValue = new KmerCountValue();
-	    int i = 0;
-	    
-	    for(i = 0; i < numOfLines; i++){
-	    	 //System.out.println(i);
-	    	 reader.next(outKey, outValue);
-	    	 writer.append(outKey, outValue);
-	    }
-	    writer.close();
-	    reader.close();
-	}
-	/**
-	 * @param args
-	 * @throws IOException 
-	 */
-	public static void main(String[] args) throws IOException {
-		// TODO Auto-generated method stub
-		Path dir = new Path("data/webmap");
-		Path inFile = new Path(dir, "part-2");
-		Path outFile = new Path(dir, "part-2-out-20000");
-		generateNumOfLinesFromBigFile(inFile,outFile,20000);
-	}
-
-}
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/testcase/GenerateTestInput.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/testcase/GenerateTestInput.java
index 8ff5589..6d81b74 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/testcase/GenerateTestInput.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/testcase/GenerateTestInput.java
@@ -61,15 +61,15 @@
 			writer = new OutputStreamWriter(new FileOutputStream("graph/55/SimplePath_55"));
 			writer.write(simplePath(55,60,3));
 			writer.close();
-			/*writer = new OutputStreamWriter(new FileOutputStream("TreePath"));
-			writer.write(treePath(5, 5, 5, 3));
+			writer = new OutputStreamWriter(new FileOutputStream("graph/55/TreePath"));
+			writer.write(treePath(55, 5, 5, 3));
 			writer.close();
-			writer = new OutputStreamWriter(new FileOutputStream("CyclePath"));
-			writer.write(cyclePath(5,10));
+			writer = new OutputStreamWriter(new FileOutputStream("graph/55/CyclePath"));
+			writer.write(cyclePath(55,60));
 			writer.close();
-			writer = new OutputStreamWriter(new FileOutputStream("BridgePath"));
-			writer.write(bridgePath(5,2));
-			writer.close();*/
+			writer = new OutputStreamWriter(new FileOutputStream("graph/55/BridgePath"));
+			writer.write(bridgePath(55,2));
+			writer.close();
 		} catch (IOException e) {
 			e.printStackTrace();
 		}
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/type/State.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/type/State.java
index 5447d26..61bcb0c 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/type/State.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/type/State.java
@@ -8,6 +8,7 @@
 	public static final int TODELETE = 4;
 	public static final int FINAL_VERTEX = 5;
 	public static final int FINAL_DELETE = 6;
+	public static final int KILL_SELF = 7;
 	
 	public final static class STATE_CONTENT{
 
@@ -35,6 +36,9 @@
 			case FINAL_DELETE:
 				r = "FINAL_DELETE";
 				break;
+			case KILL_SELF:
+				r = "KILL_SELF";
+				break;
 			}
 			return r;
 		}
diff --git a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/JobGen/JobGenerator.java b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/JobGen/JobGenerator.java
index 53340dc..763d46e 100644
--- a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/JobGen/JobGenerator.java
+++ b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/JobGen/JobGenerator.java
@@ -71,7 +71,7 @@
         job.setOutputValueClass(ValueStateWritable.class);
         FileInputFormat.setInputPaths(job, HDFS_INPUTPATH);
         FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH));
-        job.getConfiguration().setInt(LogAlgorithmForMergeGraphVertex.KMER_SIZE, 55);
+        job.getConfiguration().setInt(LogAlgorithmForMergeGraphVertex.KMER_SIZE, 5);
         job.getConfiguration().writeXml(new FileOutputStream(new File(outputPath)));
     }
     
@@ -86,8 +86,8 @@
 	public static void main(String[] args) throws IOException {
 		// TODO Auto-generated method stub
 		//genLoadGraph();
-		genMergeGraph();
-		//genLogAlgorithmForMergeGraph();
+		//genMergeGraph();
+		genLogAlgorithmForMergeGraph();
 		//genSequenceLoadGraph();
 		//genBasicBinaryLoadGraph();
 	}
diff --git a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/JobRun/RunJobTestSuite.java b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/JobRun/RunJobTestSuite.java
index 0238ca0..ffc1a25 100644
--- a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/JobRun/RunJobTestSuite.java
+++ b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/JobRun/RunJobTestSuite.java
@@ -25,8 +25,8 @@
 import edu.uci.ics.pregelix.core.jobgen.clusterconfig.ClusterConfig;
 import edu.uci.ics.pregelix.core.util.PregelixHyracksIntegrationUtil;
 
-public class RunJobTestSuite extends TestSuite{
-	
+public class RunJobTestSuite extends TestSuite {
+
 	private static final Logger LOGGER = Logger.getLogger(RunJobTestSuite.class
 			.getName());
 
@@ -40,9 +40,9 @@
 	private static final String PATH_TO_ONLY = "src/test/resources/only.txt";
 	private static final String FILE_EXTENSION_OF_RESULTS = "result";
 
-	private static final String DATA_PATH = "data/input/part-1-out-500000";//sequenceShortFileMergeTest
+	private static final String DATA_PATH = "data/result/TreePath";// sequenceShortFileMergeTest
 	private static final String HDFS_PATH = "/webmap/";
-	
+
 	private static final String HYRACKS_APP_NAME = "pregelix";
 	private static final String HADOOP_CONF_PATH = ACTUAL_RESULT_DIR
 			+ File.separator + "conf.xml";
@@ -50,13 +50,12 @@
 
 	private JobConf conf = new JobConf();
 	private int numberOfNC = 2;
-	
+
 	public void setUp() throws Exception {
 		ClusterConfig.setStorePath(PATH_TO_CLUSTER_STORE);
 		ClusterConfig.setClusterPropertiesPath(PATH_TO_CLUSTER_PROPERTIES);
 		cleanupStores();
 		PregelixHyracksIntegrationUtil.init("src/test/resources/topology.xml");
-		PregelixHyracksIntegrationUtil.createApp(HYRACKS_APP_NAME);
 		LOGGER.info("Hyracks mini-cluster started");
 		FileUtils.forceMkdir(new File(ACTUAL_RESULT_DIR));
 		FileUtils.cleanDirectory(new File(ACTUAL_RESULT_DIR));
@@ -69,7 +68,7 @@
 		FileUtils.cleanDirectory(new File("teststore"));
 		FileUtils.cleanDirectory(new File("build"));
 	}
-	
+
 	private void startHDFS() throws IOException {
 		conf.addResource(new Path(PATH_TO_HADOOP_CONF + "/core-site.xml"));
 		conf.addResource(new Path(PATH_TO_HADOOP_CONF + "/mapred-site.xml"));
@@ -90,7 +89,7 @@
 		confOutput.flush();
 		confOutput.close();
 	}
-	
+
 	/**
 	 * cleanup hdfs cluster
 	 */
@@ -99,12 +98,11 @@
 	}
 
 	public void tearDown() throws Exception {
-		PregelixHyracksIntegrationUtil.destroyApp(HYRACKS_APP_NAME);
 		PregelixHyracksIntegrationUtil.deinit();
 		LOGGER.info("Hyracks mini-cluster shut down");
 		cleanupHDFS();
 	}
-	
+
 	public static Test suite() throws Exception {
 		List<String> ignores = getFileList(PATH_TO_IGNORE);
 		List<String> onlys = getFileList(PATH_TO_ONLY);
@@ -138,12 +136,12 @@
 		}
 		return testSuite;
 	}
-	
+
 	/**
 	 * Runs the tests and collects their result in a TestResult.
 	 */
 	@Override
-	public void run(TestResult result) {		
+	public void run(TestResult result) {
 		try {
 			int testCount = countTestCases();
 			for (int i = 0; i < testCount; i++) {
@@ -158,8 +156,7 @@
 		} catch (Exception e) {
 			throw new IllegalStateException(e);
 		}
-		
-		
+
 	}
 
 	protected static List<String> getFileList(String ignorePath)
diff --git a/genomix/genomix-pregelix/src/test/resources/hadoop/conf/hdfs-site.xml b/genomix/genomix-pregelix/src/test/resources/hadoop/conf/hdfs-site.xml
index 8d29b1d..a36b6d7 100644
--- a/genomix/genomix-pregelix/src/test/resources/hadoop/conf/hdfs-site.xml
+++ b/genomix/genomix-pregelix/src/test/resources/hadoop/conf/hdfs-site.xml
@@ -12,7 +12,7 @@
 
 <property>
 	<name>dfs.block.size</name>
-	<value>65536</value>
+	<value>655360</value>
 </property>
 
 </configuration>
diff --git a/genomix/genomix-pregelix/text/BridgePath/log_BridgePath b/genomix/genomix-pregelix/text/BridgePath/log_BridgePath
new file mode 100644
index 0000000..cab1281
--- /dev/null
+++ b/genomix/genomix-pregelix/text/BridgePath/log_BridgePath
@@ -0,0 +1,6 @@
+TTCCA	T|C
+CCGTG	CT|
+TCCAC	T|CT
+CCACC	T|G	9	CCACCCCGT	5
+TTTCC	|A
+CCACT	T|G	9	CCACTCCGT	5
diff --git a/genomix/genomix-pregelix/text/BridgePath/naive_BridgePath b/genomix/genomix-pregelix/text/BridgePath/naive_BridgePath
new file mode 100644
index 0000000..c669dba
--- /dev/null
+++ b/genomix/genomix-pregelix/text/BridgePath/naive_BridgePath
@@ -0,0 +1,6 @@
+TTCCA	T|C	5	TTCCA	1
+CCGTG	CT|
+TCCAC	T|CT
+CCACC	T|G	9	CCACCCCGT	1
+TTTCC	|A
+CCACT	T|C
diff --git a/genomix/genomix-pregelix/text/CyclePath/log_CyclePath b/genomix/genomix-pregelix/text/CyclePath/log_CyclePath
new file mode 100644
index 0000000..d0ee84f
--- /dev/null
+++ b/genomix/genomix-pregelix/text/CyclePath/log_CyclePath
@@ -0,0 +1,3 @@
+GCAAC	|T
+AACTT	C|T	12	AACTTCATCAAC	5
+CAACT	GT|T
diff --git a/genomix/genomix-pregelix/text/CyclePath/naive_CyclePath b/genomix/genomix-pregelix/text/CyclePath/naive_CyclePath
new file mode 100644
index 0000000..5cdb7c2
--- /dev/null
+++ b/genomix/genomix-pregelix/text/CyclePath/naive_CyclePath
@@ -0,0 +1,3 @@
+GCAAC	|T
+AACTT	C|T	12	AACTTCATCAAC	1
+CAACT	GT|T
diff --git a/genomix/genomix-pregelix/text/LongPath/log_LongPath b/genomix/genomix-pregelix/text/LongPath/log_LongPath
new file mode 100644
index 0000000..98cb21e
--- /dev/null
+++ b/genomix/genomix-pregelix/text/LongPath/log_LongPath
@@ -0,0 +1,3 @@
+GCCTC	G|G	15	GCCTCAGTACGCCCG	5
+CCCGG	G|
+GGCCT	|C
diff --git a/genomix/genomix-pregelix/text/LongPath/naive_LongPath b/genomix/genomix-pregelix/text/LongPath/naive_LongPath
new file mode 100644
index 0000000..c1a472e
--- /dev/null
+++ b/genomix/genomix-pregelix/text/LongPath/naive_LongPath
@@ -0,0 +1,3 @@
+GCCTC	G|G	15	GCCTCAGTACGCCCG	1
+CCCGG	G|
+GGCCT	|C
diff --git a/genomix/genomix-pregelix/text/Path/log_Path b/genomix/genomix-pregelix/text/Path/log_Path
new file mode 100644
index 0000000..3a46528
--- /dev/null
+++ b/genomix/genomix-pregelix/text/Path/log_Path
@@ -0,0 +1,3 @@
+GCCTC	G|G	10	GCCTCAGTAC	5
+GGCCT	|C
+GTACG	A|
diff --git a/genomix/genomix-pregelix/text/Path/naive_Path b/genomix/genomix-pregelix/text/Path/naive_Path
new file mode 100644
index 0000000..b8d2aeb
--- /dev/null
+++ b/genomix/genomix-pregelix/text/Path/naive_Path
@@ -0,0 +1,3 @@
+GCCTC	G|G	10	GCCTCAGTAC	1
+GGCCT	|C
+GTACG	A|
diff --git a/genomix/genomix-pregelix/text/SimplePath/log_SimplePath b/genomix/genomix-pregelix/text/SimplePath/log_SimplePath
new file mode 100644
index 0000000..5c149ac
--- /dev/null
+++ b/genomix/genomix-pregelix/text/SimplePath/log_SimplePath
@@ -0,0 +1,9 @@
+CGGCA	G|A	8	CGGCAAGA	5
+AGCAC	C|
+AAGAC	|A
+GCGGC	|A
+GCATC	C|
+ATATC	|G
+TATCG	A|C	8	TATCGCAT	5
+AAGAA	C|
+AGACA	A|C	8	AGACAGCA	5
diff --git a/genomix/genomix-pregelix/text/SimplePath/naive_SimplePath b/genomix/genomix-pregelix/text/SimplePath/naive_SimplePath
new file mode 100644
index 0000000..cf53cc8
--- /dev/null
+++ b/genomix/genomix-pregelix/text/SimplePath/naive_SimplePath
@@ -0,0 +1,9 @@
+CGGCA	G|A	8	CGGCAAGA	1
+AGCAC	C|
+AAGAC	|A
+GCGGC	|A
+GCATC	C|
+ATATC	|G
+TATCG	A|C	8	TATCGCAT	1
+AAGAA	C|
+AGACA	A|C	8	AGACAGCA	1
diff --git a/genomix/genomix-pregelix/text/SinglePath/log_SinglePath b/genomix/genomix-pregelix/text/SinglePath/log_SinglePath
new file mode 100644
index 0000000..f1371ec
--- /dev/null
+++ b/genomix/genomix-pregelix/text/SinglePath/log_SinglePath
@@ -0,0 +1,3 @@
+ACAGT	A|
+GACAA	A|T	8	GACAACAG	5
+AGACA	|A
diff --git a/genomix/genomix-pregelix/text/SinglePath/naive_SinglePath b/genomix/genomix-pregelix/text/SinglePath/naive_SinglePath
new file mode 100644
index 0000000..b736667
--- /dev/null
+++ b/genomix/genomix-pregelix/text/SinglePath/naive_SinglePath
@@ -0,0 +1,3 @@
+ACAGT	A|
+GACAA	A|T	8	GACAACAG	1
+AGACA	|A
diff --git a/genomix/genomix-pregelix/text/TreePath/log_TreePath b/genomix/genomix-pregelix/text/TreePath/log_TreePath
new file mode 100644
index 0000000..0b9f198
--- /dev/null
+++ b/genomix/genomix-pregelix/text/TreePath/log_TreePath
@@ -0,0 +1,9 @@
+CAGTA	T|AC
+AGTAC	C|G	10	AGTACGCCCG	5
+ATCCC	T|
+GCCTC	G|A	8	GCCTCAGT	5
+CCCGG	G|
+GGCCT	|CG
+AGTAA	C|C	10	AGTAACTAAA	5
+TAAAC	C|
+GCCTG	G|C	12	GCCTGGCTATCC	5
diff --git a/genomix/genomix-pregelix/text/TreePath/naive_TreePath b/genomix/genomix-pregelix/text/TreePath/naive_TreePath
new file mode 100644
index 0000000..39dcbaa
--- /dev/null
+++ b/genomix/genomix-pregelix/text/TreePath/naive_TreePath
@@ -0,0 +1,9 @@
+CAGTA	T|AC
+AGTAC	C|G	10	AGTACGCCCG	1
+ATCCC	T|
+GCCTC	G|A	8	GCCTCAGT	1
+CCCGG	G|
+GGCCT	|CG
+AGTAA	C|C	10	AGTAACTAAA	1
+TAAAC	C|
+GCCTG	G|C	12	GCCTGGCTATCC	1
diff --git a/genomix/pom.xml b/genomix/pom.xml
index 6fd28e8..ea35b3e 100644
--- a/genomix/pom.xml
+++ b/genomix/pom.xml
@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>edu.uci.ics.hyracks</groupId>
 	<artifactId>genomix</artifactId>
-	<version>0.2.4-SNAPSHOT</version>
+	<version>0.2.5-SNAPSHOT</version>
     <packaging>pom</packaging>
 	<name>genomix</name>
 
diff --git a/hivesterix/hivesterix-common/pom.xml b/hivesterix/hivesterix-common/pom.xml
index 597de1b..bf0ec0a 100644
--- a/hivesterix/hivesterix-common/pom.xml
+++ b/hivesterix/hivesterix-common/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<artifactId>hivesterix</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -30,21 +30,21 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-hdfs-core</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hivesterix/hivesterix-dist/pom.xml b/hivesterix/hivesterix-dist/pom.xml
index 910d2d2..aef0320 100644
--- a/hivesterix/hivesterix-dist/pom.xml
+++ b/hivesterix/hivesterix-dist/pom.xml
@@ -2,13 +2,13 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>edu.uci.ics.hyracks</groupId>
 	<artifactId>hivesterix-dist</artifactId>
-	<version>0.2.4-SNAPSHOT</version>
+	<version>0.2.5-SNAPSHOT</version>
 	<name>hivesterix-dist</name>
 
 	<parent>
                 <groupId>edu.uci.ics.hyracks</groupId>
                 <artifactId>hivesterix</artifactId>
-                <version>0.2.4-SNAPSHOT</version>
+                <version>0.2.5-SNAPSHOT</version>
         </parent>
 
 	<dependencies>
@@ -276,14 +276,14 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-translator</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-optimizer</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -297,21 +297,21 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hivesterix/hivesterix-dist/src/main/java/edu/uci/ics/hivesterix/runtime/exec/HyracksExecutionEngine.java b/hivesterix/hivesterix-dist/src/main/java/edu/uci/ics/hivesterix/runtime/exec/HyracksExecutionEngine.java
index 379737f..53c9d42 100644
--- a/hivesterix/hivesterix-dist/src/main/java/edu/uci/ics/hivesterix/runtime/exec/HyracksExecutionEngine.java
+++ b/hivesterix/hivesterix-dist/src/main/java/edu/uci/ics/hivesterix/runtime/exec/HyracksExecutionEngine.java
@@ -258,7 +258,7 @@
         builder.setTypeTraitProvider(HiveTypeTraitProvider.INSTANCE);
         builder.setHashFunctionFamilyProvider(HiveBinaryHashFunctionFamilyProvider.INSTANCE);
 
-        jobSpec = compiler.createJob(null);
+        jobSpec = compiler.createJob(null, null);
 
         // set the policy
         String policyStr = conf.get("hive.hyracks.connectorpolicy");
@@ -558,9 +558,8 @@
             }
         }
 
-        String applicationName = "hivesterix";
         long start = System.currentTimeMillis();
-        JobId jobId = hcc.startJob(applicationName, job);
+        JobId jobId = hcc.startJob(job);
         hcc.waitForCompletion(jobId);
 
         // System.out.println("job finished: " + jobId.toString());
diff --git a/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/perf/base/AbstractPerfTestSuiteClass.java b/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/perf/base/AbstractPerfTestSuiteClass.java
index c882742..393378f 100644
--- a/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/perf/base/AbstractPerfTestSuiteClass.java
+++ b/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/perf/base/AbstractPerfTestSuiteClass.java
@@ -22,8 +22,6 @@
 import org.apache.hadoop.mapred.MiniMRCluster;
 
 import edu.uci.ics.hivesterix.common.config.ConfUtil;
-import edu.uci.ics.hyracks.api.client.HyracksConnection;
-import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
 import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
 import edu.uci.ics.hyracks.control.common.controllers.CCConfig;
 import edu.uci.ics.hyracks.control.common.controllers.NCConfig;
@@ -93,7 +91,6 @@
         String ipAddress = hconf.get("hive.hyracks.host");
         int clientPort = Integer.parseInt(hconf.get("hive.hyracks.port"));
         int clusterPort = clientPort;
-        String applicationName = hconf.get("hive.hyracks.app");
 
         // start hyracks cc
         CCConfig ccConfig = new CCConfig();
@@ -119,9 +116,6 @@
             nc.start();
             ncs.put(ncConfig.nodeId, nc);
         }
-
-        IHyracksClientConnection hcc = new HyracksConnection(ccConfig.clientNetIpAddress, clientPort);
-        hcc.createApplication(applicationName, null);
     }
 
     protected void makeDir(String path) throws IOException {
diff --git a/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/base/AbstractTestSuiteClass.java b/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/base/AbstractTestSuiteClass.java
index 09b632a..5e2e64e 100644
--- a/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/base/AbstractTestSuiteClass.java
+++ b/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/base/AbstractTestSuiteClass.java
@@ -27,8 +27,6 @@
 import org.apache.hadoop.mapred.JobConf;
 
 import edu.uci.ics.hivesterix.common.config.ConfUtil;
-import edu.uci.ics.hyracks.api.client.HyracksConnection;
-import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
 import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
 import edu.uci.ics.hyracks.control.common.controllers.CCConfig;
 import edu.uci.ics.hyracks.control.common.controllers.NCConfig;
@@ -116,7 +114,6 @@
         }
         int clientPort = Integer.parseInt(clusterProps.getProperty("CC_CLIENTPORT"));
         int netPort = Integer.parseInt(clusterProps.getProperty("CC_CLUSTERPORT"));
-        String applicationName = "hivesterix";
 
         // start hyracks cc
         CCConfig ccConfig = new CCConfig();
@@ -143,9 +140,6 @@
             nc.start();
             ncs.put(ncConfig.nodeId, nc);
         }
-
-        IHyracksClientConnection hcc = new HyracksConnection(ccConfig.clientNetIpAddress, clientPort);
-        hcc.createApplication(applicationName, null);
     }
 
     protected void makeDir(String path) throws IOException {
diff --git a/hivesterix/hivesterix-optimizer/pom.xml b/hivesterix/hivesterix-optimizer/pom.xml
index 84c299f..77a5d53 100644
--- a/hivesterix/hivesterix-optimizer/pom.xml
+++ b/hivesterix/hivesterix-optimizer/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<artifactId>hivesterix</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 	<artifactId>hivesterix-optimizer</artifactId>
@@ -30,14 +30,14 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-common</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-translator</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hivesterix/hivesterix-runtime/pom.xml b/hivesterix/hivesterix-runtime/pom.xml
index 9c66cf4..fc55273 100644
--- a/hivesterix/hivesterix-runtime/pom.xml
+++ b/hivesterix/hivesterix-runtime/pom.xml
@@ -2,13 +2,13 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>edu.uci.ics.hyracks</groupId>
 	<artifactId>hivesterix-runtime</artifactId>
-	<version>0.2.4-SNAPSHOT</version>
+	<version>0.2.5-SNAPSHOT</version>
 	<name>hivesterix-runtime</name>
 
 	<parent>
                 <groupId>edu.uci.ics.hyracks</groupId>
                 <artifactId>hivesterix</artifactId>
-                <version>0.2.4-SNAPSHOT</version>
+                <version>0.2.5-SNAPSHOT</version>
         </parent>
 
 	<dependencies>
@@ -276,35 +276,35 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-serde</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-common</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/jobgen/HiveMetaDataProvider.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/jobgen/HiveMetaDataProvider.java
index daf6a7f..d7a1d7c 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/jobgen/HiveMetaDataProvider.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/jobgen/HiveMetaDataProvider.java
@@ -8,8 +8,6 @@
 import org.apache.hadoop.hive.ql.plan.PartitionDesc;
 
 import edu.uci.ics.hivesterix.logical.expression.HiveFunctionInfo;
-import edu.uci.ics.hivesterix.runtime.jobgen.HiveScanRuntimeGenerator;
-import edu.uci.ics.hivesterix.runtime.jobgen.HiveWriteRuntimeGenerator;
 import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraint;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
 import edu.uci.ics.hyracks.algebricks.common.utils.Pair;
@@ -61,8 +59,8 @@
     @Override
     public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getScannerRuntime(IDataSource<S> dataSource,
             List<LogicalVariable> scanVariables, List<LogicalVariable> projectVariables, boolean projectPushed,
-            IOperatorSchema opSchema, IVariableTypeEnvironment typeEnv, JobGenContext context, JobSpecification jobSpec)
-            throws AlgebricksException {
+            IOperatorSchema opSchema, IVariableTypeEnvironment typeEnv, JobGenContext context,
+            JobSpecification jobSpec, Object implConfig) throws AlgebricksException {
 
         S desc = dataSource.getId();
         HiveScanRuntimeGenerator generator = new HiveScanRuntimeGenerator((PartitionDesc) desc);
@@ -79,17 +77,19 @@
     }
 
     @Override
-    public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getDeleteRuntime(IDataSource<S> arg0,
-            IOperatorSchema arg1, List<LogicalVariable> arg2, LogicalVariable arg3, RecordDescriptor arg4,
-            JobGenContext arg5, JobSpecification arg6) throws AlgebricksException {
+    public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getInsertRuntime(IDataSource<S> dataSource,
+            IOperatorSchema propagatedSchema, IVariableTypeEnvironment typeEnv, List<LogicalVariable> keys,
+            LogicalVariable payLoadVar, RecordDescriptor recordDesc, JobGenContext context, JobSpecification jobSpec)
+            throws AlgebricksException {
         // TODO Auto-generated method stub
         return null;
     }
 
     @Override
-    public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getInsertRuntime(IDataSource<S> arg0,
-            IOperatorSchema arg1, List<LogicalVariable> arg2, LogicalVariable arg3, RecordDescriptor arg4,
-            JobGenContext arg5, JobSpecification arg6) throws AlgebricksException {
+    public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getDeleteRuntime(IDataSource<S> dataSource,
+            IOperatorSchema propagatedSchema, IVariableTypeEnvironment typeEnv, List<LogicalVariable> keys,
+            LogicalVariable payLoadVar, RecordDescriptor recordDesc, JobGenContext context, JobSpecification jobSpec)
+            throws AlgebricksException {
         // TODO Auto-generated method stub
         return null;
     }
@@ -133,5 +133,4 @@
         // TODO Auto-generated method stub
         return null;
     }
-
 }
diff --git a/hivesterix/hivesterix-serde/pom.xml b/hivesterix/hivesterix-serde/pom.xml
index b5e8fe1..72c9cc9 100644
--- a/hivesterix/hivesterix-serde/pom.xml
+++ b/hivesterix/hivesterix-serde/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<artifactId>hivesterix</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 	<artifactId>hivesterix-serde</artifactId>
@@ -44,14 +44,14 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
                         <groupId>edu.uci.ics.hyracks</groupId>
                         <artifactId>hivesterix-common</artifactId>
-                        <version>0.2.4-SNAPSHOT</version>
+                        <version>0.2.5-SNAPSHOT</version>
                         <type>jar</type>
                         <scope>compile</scope>
                 </dependency>
diff --git a/hivesterix/hivesterix-translator/pom.xml b/hivesterix/hivesterix-translator/pom.xml
index 2a93722..e7ad3ed 100644
--- a/hivesterix/hivesterix-translator/pom.xml
+++ b/hivesterix/hivesterix-translator/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<artifactId>hivesterix</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -37,21 +37,21 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-common</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-runtime</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hivesterix/pom.xml b/hivesterix/pom.xml
index 00d008a..6ae37b5 100644
--- a/hivesterix/pom.xml
+++ b/hivesterix/pom.xml
@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>edu.uci.ics.hyracks</groupId>
 	<artifactId>hivesterix</artifactId>
-	<version>0.2.4-SNAPSHOT</version>
+	<version>0.2.5-SNAPSHOT</version>
 	<packaging>pom</packaging>
 	<name>hivesterix</name>
 
diff --git a/hyracks/hyracks-api/pom.xml b/hyracks/hyracks-api/pom.xml
index 091767b..45421e1 100644
--- a/hyracks/hyracks-api/pom.xml
+++ b/hyracks/hyracks-api/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -47,7 +47,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-ipc</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   	</dependency>
   	<dependency>
   		<groupId>org.apache.commons</groupId>
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/IApplicationContext.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/IApplicationContext.java
index 81cf511..6ee719b 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/IApplicationContext.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/IApplicationContext.java
@@ -16,25 +16,16 @@
 
 import java.io.Serializable;
 
+import edu.uci.ics.hyracks.api.job.IJobSerializerDeserializerContainer;
 import edu.uci.ics.hyracks.api.messages.IMessageBroker;
 
 /**
- * Base class of the {@link ICCApplicationContext} and the
- * {@link INCApplicationContext}.
+ * Base class of the {@link ICCApplicationContext} and the {@link INCApplicationContext}.
  * 
  * @author vinayakb
- * 
  */
 public interface IApplicationContext {
     /**
-     * Provides the Class Loader that loads classes for this Hyracks Application
-     * at the CC.
-     * 
-     * @return the application {@link ClassLoader}.
-     */
-    public ClassLoader getClassLoader();
-
-    /**
      * Gets the distributed state that is made available to all the Application
      * Contexts of this application in the cluster.
      * 
@@ -46,5 +37,6 @@
 
     public IMessageBroker getMessageBroker();
 
-    public String getApplicationName();
+    public IJobSerializerDeserializerContainer getJobSerializerDeserializerContainer();
+
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/IBootstrap.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/IBootstrap.java
deleted file mode 100644
index 19f97b4..0000000
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/IBootstrap.java
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.api.application;
-
-/**
- * Base class of {@link ICCBootstrap} and {@link INCBootstrap}.
- * 
- * @author vinayakb
- */
-public interface IBootstrap {
-    /**
-     * Method called to start the application at a Hyracks CC or NC node.
-     * 
-     * @throws Exception
-     */
-    public void start() throws Exception;
-
-    /**
-     * Method called to shutdown the application at a Hyracks CC or NC node.
-     * 
-     * @throws Exception
-     */
-    public void stop() throws Exception;
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/ICCApplicationContext.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/ICCApplicationContext.java
index 2792d29..c4b7802 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/ICCApplicationContext.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/ICCApplicationContext.java
@@ -27,8 +27,10 @@
 public interface ICCApplicationContext extends IApplicationContext {
     /**
      * Sets the state that must be distributed by the infrastructure to all the
-     * NC application contects. Any state set by calling thsi method in the {@link ICCBootstrap#start()} call is made available to all the {@link INCApplicationContext} objects at each Node Controller. The state
-     * is then available to be inspected by the application at the NC during or
+     * NC application contexts. Any state set by calling this method in
+     * the {@link ICCApplicationEntryPoint#start(ICCApplicationContext, String[])} call
+     * is made available to all the {@link INCApplicationContext} objects at each Node Controller.
+     * The state is then available to be inspected by the application at the NC during or
      * after the {@link INCBootstrap#start()} call.
      * 
      * @param state
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/ICCApplicationEntryPoint.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/ICCApplicationEntryPoint.java
new file mode 100644
index 0000000..c22cc51
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/ICCApplicationEntryPoint.java
@@ -0,0 +1,7 @@
+package edu.uci.ics.hyracks.api.application;
+
+public interface ICCApplicationEntryPoint {
+    public void start(ICCApplicationContext ccAppCtx, String[] args) throws Exception;
+
+    public void stop() throws Exception;
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/ICCBootstrap.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/ICCBootstrap.java
deleted file mode 100644
index e3906ea..0000000
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/ICCBootstrap.java
+++ /dev/null
@@ -1,19 +0,0 @@
-package edu.uci.ics.hyracks.api.application;
-
-/**
- * Implemented by the bootstrap class of the application that will manage its
- * life cycle at the Cluster Controller.
- * 
- * @author vinayakb
- * 
- */
-public interface ICCBootstrap extends IBootstrap {
-    /**
-     * Called by the infrastructure to set the CC Application Context for the
-     * application. The infrastructure makes this call prior to calling start().
-     * 
-     * @param appCtx
-     *            - The CC application context
-     */
-    public void setApplicationContext(ICCApplicationContext appCtx);
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/INCApplicationEntryPoint.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/INCApplicationEntryPoint.java
new file mode 100644
index 0000000..9a25b3c
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/INCApplicationEntryPoint.java
@@ -0,0 +1,9 @@
+package edu.uci.ics.hyracks.api.application;
+
+public interface INCApplicationEntryPoint {
+    public void start(INCApplicationContext ncAppCtx, String[] args) throws Exception;
+
+    public void notifyStartupComplete() throws Exception;
+
+    public void stop() throws Exception;
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/INCBootstrap.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/INCBootstrap.java
deleted file mode 100644
index 300f7c7..0000000
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/INCBootstrap.java
+++ /dev/null
@@ -1,19 +0,0 @@
-package edu.uci.ics.hyracks.api.application;
-
-/**
- * Implemented by the bootstrap class of the application that will manage its
- * life cycle at a Node Controller.
- * 
- * @author vinayakb
- * 
- */
-public interface INCBootstrap extends IBootstrap {
-    /**
-     * Called by the infrastructure to set the NC Application Context for the
-     * application. The infrastructure makes this call prior to calling start().
-     * 
-     * @param appCtx
-     *            - The NC application context
-     */
-    public void setApplicationContext(INCApplicationContext appCtx);
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceFunctions.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceFunctions.java
index cd2b698..0467eae 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceFunctions.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceFunctions.java
@@ -15,10 +15,13 @@
 package edu.uci.ics.hyracks.api.client;
 
 import java.io.Serializable;
+import java.net.URL;
 import java.util.EnumSet;
+import java.util.List;
 
 import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord;
 import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
 
@@ -26,9 +29,6 @@
     public enum FunctionId {
         GET_CLUSTER_CONTROLLER_INFO,
         GET_CLUSTER_TOPOLOGY,
-        CREATE_APPLICATION,
-        START_APPLICATION,
-        DESTROY_APPLICATION,
         CREATE_JOB,
         GET_JOB_STATUS,
         START_JOB,
@@ -37,7 +37,9 @@
         GET_DATASET_RECORD_DESCRIPTOR,
         GET_DATASET_RESULT_LOCATIONS,
         WAIT_FOR_COMPLETION,
-        GET_NODE_CONTROLLERS_INFO
+        GET_NODE_CONTROLLERS_INFO,
+        CLI_DEPLOY_BINARY,
+        CLI_UNDEPLOY_BINARY
     }
 
     public abstract static class Function implements Serializable {
@@ -55,63 +57,6 @@
         }
     }
 
-    public static class CreateApplicationFunction extends Function {
-        private static final long serialVersionUID = 1L;
-
-        private final String appName;
-
-        public CreateApplicationFunction(String appName) {
-            this.appName = appName;
-        }
-
-        @Override
-        public FunctionId getFunctionId() {
-            return FunctionId.CREATE_APPLICATION;
-        }
-
-        public String getAppName() {
-            return appName;
-        }
-    }
-
-    public static class StartApplicationFunction extends Function {
-        private static final long serialVersionUID = 1L;
-
-        private final String appName;
-
-        public StartApplicationFunction(String appName) {
-            this.appName = appName;
-        }
-
-        @Override
-        public FunctionId getFunctionId() {
-            return FunctionId.START_APPLICATION;
-        }
-
-        public String getAppName() {
-            return appName;
-        }
-    }
-
-    public static class DestroyApplicationFunction extends Function {
-        private static final long serialVersionUID = 1L;
-
-        private final String appName;
-
-        public DestroyApplicationFunction(String appName) {
-            this.appName = appName;
-        }
-
-        @Override
-        public FunctionId getFunctionId() {
-            return FunctionId.DESTROY_APPLICATION;
-        }
-
-        public String getAppName() {
-            return appName;
-        }
-    }
-
     public static class GetJobStatusFunction extends Function {
         private static final long serialVersionUID = 1L;
 
@@ -134,14 +79,20 @@
     public static class StartJobFunction extends Function {
         private static final long serialVersionUID = 1L;
 
-        private final String appName;
         private final byte[] acggfBytes;
         private final EnumSet<JobFlag> jobFlags;
+        private final DeploymentId deploymentId;
 
-        public StartJobFunction(String appName, byte[] acggfBytes, EnumSet<JobFlag> jobFlags) {
-            this.appName = appName;
+        public StartJobFunction(byte[] acggfBytes, EnumSet<JobFlag> jobFlags) {
             this.acggfBytes = acggfBytes;
             this.jobFlags = jobFlags;
+            this.deploymentId = null;
+        }
+
+        public StartJobFunction(DeploymentId deploymentId, byte[] acggfBytes, EnumSet<JobFlag> jobFlags) {
+            this.acggfBytes = acggfBytes;
+            this.jobFlags = jobFlags;
+            this.deploymentId = deploymentId;
         }
 
         @Override
@@ -149,10 +100,6 @@
             return FunctionId.START_JOB;
         }
 
-        public String getAppName() {
-            return appName;
-        }
-
         public byte[] getACGGFBytes() {
             return acggfBytes;
         }
@@ -160,6 +107,10 @@
         public EnumSet<JobFlag> getJobFlags() {
             return jobFlags;
         }
+
+        public DeploymentId getDeploymentId() {
+            return deploymentId;
+        }
     }
 
     public static class GetDatasetDirectoryServiceInfoFunction extends Function {
@@ -266,4 +217,46 @@
             return FunctionId.GET_CLUSTER_TOPOLOGY;
         }
     }
+
+    public static class CliDeployBinaryFunction extends Function {
+        private static final long serialVersionUID = 1L;
+        private final List<URL> binaryURLs;
+        private final DeploymentId deploymentId;
+
+        public CliDeployBinaryFunction(List<URL> binaryURLs, DeploymentId deploymentId) {
+            this.binaryURLs = binaryURLs;
+            this.deploymentId = deploymentId;
+        }
+
+        @Override
+        public FunctionId getFunctionId() {
+            return FunctionId.CLI_DEPLOY_BINARY;
+        }
+
+        public List<URL> getBinaryURLs() {
+            return binaryURLs;
+        }
+
+        public DeploymentId getDeploymentId() {
+            return deploymentId;
+        }
+    }
+
+    public static class CliUnDeployBinaryFunction extends Function {
+        private static final long serialVersionUID = 1L;
+        private final DeploymentId deploymentId;
+
+        public CliUnDeployBinaryFunction(DeploymentId deploymentId) {
+            this.deploymentId = deploymentId;
+        }
+
+        @Override
+        public FunctionId getFunctionId() {
+            return FunctionId.CLI_UNDEPLOY_BINARY;
+        }
+
+        public DeploymentId getDeploymentId() {
+            return deploymentId;
+        }
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceRemoteProxy.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceRemoteProxy.java
index 2ab42c0..36ceb18 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceRemoteProxy.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceRemoteProxy.java
@@ -14,10 +14,13 @@
  */
 package edu.uci.ics.hyracks.api.client;
 
+import java.net.URL;
 import java.util.EnumSet;
+import java.util.List;
 import java.util.Map;
 
 import edu.uci.ics.hyracks.api.comm.NetworkAddress;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.job.JobStatus;
@@ -42,27 +45,6 @@
     }
 
     @Override
-    public void createApplication(String appName) throws Exception {
-        HyracksClientInterfaceFunctions.CreateApplicationFunction caf = new HyracksClientInterfaceFunctions.CreateApplicationFunction(
-                appName);
-        rpci.call(ipcHandle, caf);
-    }
-
-    @Override
-    public void startApplication(String appName) throws Exception {
-        HyracksClientInterfaceFunctions.StartApplicationFunction saf = new HyracksClientInterfaceFunctions.StartApplicationFunction(
-                appName);
-        rpci.call(ipcHandle, saf);
-    }
-
-    @Override
-    public void destroyApplication(String appName) throws Exception {
-        HyracksClientInterfaceFunctions.DestroyApplicationFunction daf = new HyracksClientInterfaceFunctions.DestroyApplicationFunction(
-                appName);
-        rpci.call(ipcHandle, daf);
-    }
-
-    @Override
     public JobStatus getJobStatus(JobId jobId) throws Exception {
         HyracksClientInterfaceFunctions.GetJobStatusFunction gjsf = new HyracksClientInterfaceFunctions.GetJobStatusFunction(
                 jobId);
@@ -70,9 +52,16 @@
     }
 
     @Override
-    public JobId startJob(String appName, byte[] acggfBytes, EnumSet<JobFlag> jobFlags) throws Exception {
+    public JobId startJob(byte[] acggfBytes, EnumSet<JobFlag> jobFlags) throws Exception {
         HyracksClientInterfaceFunctions.StartJobFunction sjf = new HyracksClientInterfaceFunctions.StartJobFunction(
-                appName, acggfBytes, jobFlags);
+                acggfBytes, jobFlags);
+        return (JobId) rpci.call(ipcHandle, sjf);
+    }
+
+    @Override
+    public JobId startJob(DeploymentId deploymentId, byte[] acggfBytes, EnumSet<JobFlag> jobFlags) throws Exception {
+        HyracksClientInterfaceFunctions.StartJobFunction sjf = new HyracksClientInterfaceFunctions.StartJobFunction(
+                deploymentId, acggfBytes, jobFlags);
         return (JobId) rpci.call(ipcHandle, sjf);
     }
 
@@ -100,4 +89,18 @@
         HyracksClientInterfaceFunctions.GetClusterTopologyFunction gctf = new HyracksClientInterfaceFunctions.GetClusterTopologyFunction();
         return (ClusterTopology) rpci.call(ipcHandle, gctf);
     }
+
+    @Override
+    public void deployBinary(List<URL> binaryURLs, DeploymentId deploymentId) throws Exception {
+        HyracksClientInterfaceFunctions.CliDeployBinaryFunction dbf = new HyracksClientInterfaceFunctions.CliDeployBinaryFunction(
+                binaryURLs, deploymentId);
+        rpci.call(ipcHandle, dbf);
+    }
+
+    @Override
+    public void unDeployBinary(DeploymentId deploymentId) throws Exception {
+        HyracksClientInterfaceFunctions.CliUnDeployBinaryFunction dbf = new HyracksClientInterfaceFunctions.CliUnDeployBinaryFunction(
+                deploymentId);
+        rpci.call(ipcHandle, dbf);
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksConnection.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksConnection.java
index e0fafb0..eb25b70 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksConnection.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksConnection.java
@@ -16,8 +16,12 @@
 
 import java.io.File;
 import java.net.InetSocketAddress;
+import java.net.URL;
+import java.util.ArrayList;
 import java.util.EnumSet;
+import java.util.List;
 import java.util.Map;
+import java.util.UUID;
 
 import org.apache.http.HttpResponse;
 import org.apache.http.client.HttpClient;
@@ -27,6 +31,7 @@
 
 import edu.uci.ics.hyracks.api.client.impl.JobSpecificationActivityClusterGraphGeneratorFactory;
 import edu.uci.ics.hyracks.api.comm.NetworkAddress;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.api.job.IActivityClusterGraphGeneratorFactory;
 import edu.uci.ics.hyracks.api.job.JobFlag;
@@ -77,46 +82,24 @@
     }
 
     @Override
-    public void createApplication(String appName, File harFile) throws Exception {
-        hci.createApplication(appName);
-        if (harFile != null) {
-            HttpClient hc = new DefaultHttpClient();
-            HttpPut put = new HttpPut("http://" + ccHost + ":" + ccInfo.getWebPort() + "/applications/" + appName);
-            put.setEntity(new FileEntity(harFile, "application/octet-stream"));
-            HttpResponse response = hc.execute(put);
-            if (response.getStatusLine().getStatusCode() != 200) {
-                hci.destroyApplication(appName);
-                throw new HyracksException(response.getStatusLine().toString());
-            }
-        }
-        hci.startApplication(appName);
-    }
-
-    @Override
-    public void destroyApplication(String appName) throws Exception {
-        hci.destroyApplication(appName);
-    }
-
-    @Override
     public JobStatus getJobStatus(JobId jobId) throws Exception {
         return hci.getJobStatus(jobId);
     }
 
     @Override
-    public JobId startJob(String appName, JobSpecification jobSpec) throws Exception {
-        return startJob(appName, jobSpec, EnumSet.noneOf(JobFlag.class));
+    public JobId startJob(JobSpecification jobSpec) throws Exception {
+        return startJob(jobSpec, EnumSet.noneOf(JobFlag.class));
     }
 
     @Override
-    public JobId startJob(String appName, JobSpecification jobSpec, EnumSet<JobFlag> jobFlags) throws Exception {
+    public JobId startJob(JobSpecification jobSpec, EnumSet<JobFlag> jobFlags) throws Exception {
         JobSpecificationActivityClusterGraphGeneratorFactory jsacggf = new JobSpecificationActivityClusterGraphGeneratorFactory(
                 jobSpec);
-        return startJob(appName, jsacggf, jobFlags);
+        return startJob(jsacggf, jobFlags);
     }
 
-    public JobId startJob(String appName, IActivityClusterGraphGeneratorFactory acggf, EnumSet<JobFlag> jobFlags)
-            throws Exception {
-        return hci.startJob(appName, JavaSerializationUtils.serialize(acggf), jobFlags);
+    public JobId startJob(IActivityClusterGraphGeneratorFactory acggf, EnumSet<JobFlag> jobFlags) throws Exception {
+        return hci.startJob(JavaSerializationUtils.serialize(acggf), jobFlags);
     }
 
     public NetworkAddress getDatasetDirectoryServiceInfo() throws Exception {
@@ -137,4 +120,55 @@
     public ClusterTopology getClusterTopology() throws Exception {
         return hci.getClusterTopology();
     }
+
+    @Override
+    public DeploymentId deployBinary(List<String> jars) throws Exception {
+        DeploymentId deploymentId = new DeploymentId(UUID.randomUUID().toString());
+        List<URL> binaryURLs = new ArrayList<URL>();
+        if (jars != null && jars.size() > 0) {
+            HttpClient hc = new DefaultHttpClient();
+            for (String jar : jars) {
+                int slashIndex = jar.lastIndexOf('/');
+                String fileName = jar.substring(slashIndex + 1);
+                String url = "http://" + ccHost + ":" + ccInfo.getWebPort() + "/applications/"
+                        + deploymentId.toString() + "&" + fileName;
+                HttpPut put = new HttpPut(url);
+                put.setEntity(new FileEntity(new File(jar), "application/octet-stream"));
+                HttpResponse response = hc.execute(put);
+                if (response != null) {
+                    response.getEntity().consumeContent();
+                }
+                if (response.getStatusLine().getStatusCode() != 200) {
+                    throw new HyracksException(response.getStatusLine().toString());
+                }
+                binaryURLs.add(new URL(url));
+            }
+        }
+        hci.deployBinary(binaryURLs, deploymentId);
+        return deploymentId;
+    }
+
+    @Override
+    public void unDeployBinary(DeploymentId deploymentId) throws Exception {
+        hci.unDeployBinary(deploymentId);
+    }
+
+    @Override
+    public JobId startJob(DeploymentId deploymentId, JobSpecification jobSpec) throws Exception {
+        return startJob(deploymentId, jobSpec, EnumSet.noneOf(JobFlag.class));
+    }
+
+    @Override
+    public JobId startJob(DeploymentId deploymentId, JobSpecification jobSpec, EnumSet<JobFlag> jobFlags)
+            throws Exception {
+        JobSpecificationActivityClusterGraphGeneratorFactory jsacggf = new JobSpecificationActivityClusterGraphGeneratorFactory(
+                jobSpec);
+        return startJob(deploymentId, jsacggf, jobFlags);
+    }
+
+    @Override
+    public JobId startJob(DeploymentId deploymentId, IActivityClusterGraphGeneratorFactory acggf,
+            EnumSet<JobFlag> jobFlags) throws Exception {
+        return hci.startJob(deploymentId, JavaSerializationUtils.serialize(acggf), jobFlags);
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientConnection.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientConnection.java
index 6333c22..37bbdfa 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientConnection.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientConnection.java
@@ -14,11 +14,12 @@
  */
 package edu.uci.ics.hyracks.api.client;
 
-import java.io.File;
 import java.util.EnumSet;
+import java.util.List;
 import java.util.Map;
 
 import edu.uci.ics.hyracks.api.comm.NetworkAddress;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.job.IActivityClusterGraphGeneratorFactory;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
@@ -33,26 +34,6 @@
  */
 public interface IHyracksClientConnection {
     /**
-     * Create a Hyracks Application
-     * 
-     * @param appName
-     *            Name of the application
-     * @param harFile
-     *            Archive that contains deployable code for the application
-     * @throws Exception
-     */
-    public void createApplication(String appName, File harFile) throws Exception;
-
-    /**
-     * Destroy an already-deployed Hyracks application
-     * 
-     * @param appName
-     *            Name of the application
-     * @throws Exception
-     */
-    public void destroyApplication(String appName) throws Exception;
-
-    /**
      * Gets the status of the specified Job.
      * 
      * @param jobId
@@ -71,7 +52,7 @@
      *            Job Specification
      * @throws Exception
      */
-    public JobId startJob(String appName, JobSpecification jobSpec) throws Exception;
+    public JobId startJob(JobSpecification jobSpec) throws Exception;
 
     /**
      * Start the specified Job.
@@ -84,7 +65,7 @@
      *            Flags
      * @throws Exception
      */
-    public JobId startJob(String appName, JobSpecification jobSpec, EnumSet<JobFlag> jobFlags) throws Exception;
+    public JobId startJob(JobSpecification jobSpec, EnumSet<JobFlag> jobFlags) throws Exception;
 
     /**
      * Start the specified Job.
@@ -97,8 +78,7 @@
      *            Flags
      * @throws Exception
      */
-    public JobId startJob(String appName, IActivityClusterGraphGeneratorFactory acggf, EnumSet<JobFlag> jobFlags)
-            throws Exception;
+    public JobId startJob(IActivityClusterGraphGeneratorFactory acggf, EnumSet<JobFlag> jobFlags) throws Exception;
 
     /**
      * Gets the IP Address and port for the DatasetDirectoryService wrapped in NetworkAddress
@@ -132,4 +112,60 @@
      * @throws Exception
      */
     public ClusterTopology getClusterTopology() throws Exception;
-}
+
+    /**
+     * Deploy the user-defined jars to the cluster
+     * 
+     * @param jars
+     *            a list of user-defined jars
+     */
+    public DeploymentId deployBinary(List<String> jars) throws Exception;
+
+    /**
+     * undeploy a certain deployment
+     * 
+     * @param jars
+     *            a list of user-defined jars
+     */
+    public void unDeployBinary(DeploymentId deploymentId) throws Exception;
+
+    /**
+     * Start the specified Job.
+     * 
+     * @param deploymentId
+     *            the id of the specific deployment
+     * @param jobSpec
+     *            Job Specification
+     * @throws Exception
+     */
+    public JobId startJob(DeploymentId deploymentId, JobSpecification jobSpec) throws Exception;
+
+    /**
+     * Start the specified Job.
+     * 
+     * @param deploymentId
+     *            the id of the specific deployment
+     * @param jobSpec
+     *            Job Specification
+     * @param jobFlags
+     *            Flags
+     * @throws Exception
+     */
+    public JobId startJob(DeploymentId deploymentId, JobSpecification jobSpec, EnumSet<JobFlag> jobFlags)
+            throws Exception;
+
+    /**
+     * Start the specified Job.
+     * 
+     * @param deploymentId
+     *            the id of the specific deployment
+     * @param acggf
+     *            Activity Cluster Graph Generator Factory
+     * @param jobFlags
+     *            Flags
+     * @throws Exception
+     */
+    public JobId startJob(DeploymentId deploymentId, IActivityClusterGraphGeneratorFactory acggf,
+            EnumSet<JobFlag> jobFlags) throws Exception;
+
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientInterface.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientInterface.java
index 22b0a8f..aabc351 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientInterface.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientInterface.java
@@ -14,10 +14,13 @@
  */
 package edu.uci.ics.hyracks.api.client;
 
+import java.net.URL;
 import java.util.EnumSet;
+import java.util.List;
 import java.util.Map;
 
 import edu.uci.ics.hyracks.api.comm.NetworkAddress;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.job.JobStatus;
@@ -26,15 +29,9 @@
 public interface IHyracksClientInterface {
     public ClusterControllerInfo getClusterControllerInfo() throws Exception;
 
-    public void createApplication(String appName) throws Exception;
-
-    public void startApplication(String appName) throws Exception;
-
-    public void destroyApplication(String appName) throws Exception;
-
     public JobStatus getJobStatus(JobId jobId) throws Exception;
 
-    public JobId startJob(String appName, byte[] acggfBytes, EnumSet<JobFlag> jobFlags) throws Exception;
+    public JobId startJob(byte[] acggfBytes, EnumSet<JobFlag> jobFlags) throws Exception;
 
     public NetworkAddress getDatasetDirectoryServiceInfo() throws Exception;
 
@@ -43,4 +40,10 @@
     public Map<String, NodeControllerInfo> getNodeControllersInfo() throws Exception;
 
     public ClusterTopology getClusterTopology() throws Exception;
+
+    public void deployBinary(List<URL> binaryURLs, DeploymentId deploymentId) throws Exception;
+
+    public void unDeployBinary(DeploymentId deploymentId) throws Exception;
+
+    public JobId startJob(DeploymentId deploymentId, byte[] acggfBytes, EnumSet<JobFlag> jobFlags) throws Exception;
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/impl/JobSpecificationActivityClusterGraphGeneratorFactory.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/impl/JobSpecificationActivityClusterGraphGeneratorFactory.java
index 0eac9a2..3431c40 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/impl/JobSpecificationActivityClusterGraphGeneratorFactory.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/impl/JobSpecificationActivityClusterGraphGeneratorFactory.java
@@ -29,7 +29,7 @@
     }
 
     @Override
-    public IActivityClusterGraphGenerator createActivityClusterGraphGenerator(String appName, JobId jobId,
+    public IActivityClusterGraphGenerator createActivityClusterGraphGenerator(JobId jobId,
             final ICCApplicationContext ccAppCtx, EnumSet<JobFlag> jobFlags) throws HyracksException {
         final JobActivityGraphBuilder builder = new JobActivityGraphBuilder(spec, jobFlags);
         PlanUtils.visit(spec, new IConnectorDescriptorVisitor() {
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksJobletContext.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksJobletContext.java
index fad4300..f8c5b6a 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksJobletContext.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksJobletContext.java
@@ -28,4 +28,8 @@
     public ICounterContext getCounterContext();
 
     public Object getGlobalJobData();
+
+    public Class<?> loadClass(String className);
+
+    public ClassLoader getClassLoader();
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksTaskContext.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksTaskContext.java
index a2ee977..f0b47b1 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksTaskContext.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksTaskContext.java
@@ -16,6 +16,7 @@
 
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
 import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionManager;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.io.IWorkspaceFileFactory;
 import edu.uci.ics.hyracks.api.job.IOperatorEnvironment;
 import edu.uci.ics.hyracks.api.job.profiling.counters.ICounterContext;
@@ -31,5 +32,5 @@
 
     public IDatasetPartitionManager getDatasetPartitionManager();
 
-    public void sendApplicationMessageToCC(byte[] message, String nodeId) throws Exception;
+    public void sendApplicationMessageToCC(byte[] message, DeploymentId deploymendId, String nodeId) throws Exception;
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/ILinearizeComparator.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/ILinearizeComparator.java
new file mode 100644
index 0000000..51a8cfe
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/ILinearizeComparator.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataflow.value;
+
+public interface ILinearizeComparator extends IBinaryComparator {
+    public int getDimensions();
+
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/ILinearizeComparatorFactory.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/ILinearizeComparatorFactory.java
new file mode 100644
index 0000000..79619c4
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/ILinearizeComparatorFactory.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataflow.value;
+
+
+public interface ILinearizeComparatorFactory extends IBinaryComparatorFactory {
+    public ILinearizeComparator createBinaryComparator();
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/DatasetJobRecord.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/DatasetJobRecord.java
new file mode 100644
index 0000000..dc99ef3
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/DatasetJobRecord.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataset;
+
+import java.util.HashMap;
+
+public class DatasetJobRecord extends HashMap<ResultSetId, ResultSetMetaData> {
+    public enum Status {
+        RUNNING,
+        SUCCESS,
+        FAILED
+    }
+
+    private static final long serialVersionUID = 1L;
+
+    private Status status;
+
+    public DatasetJobRecord() {
+        this.status = Status.RUNNING;
+    }
+
+    public void start() {
+        status = Status.RUNNING;
+    }
+
+    public void success() {
+        status = Status.SUCCESS;
+    }
+
+    public void fail() {
+        status = Status.FAILED;
+    }
+
+    public Status getStatus() {
+        return status;
+    }
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetDirectoryService.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetDirectoryService.java
index 5266333..52e6005 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetDirectoryService.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetDirectoryService.java
@@ -15,11 +15,12 @@
 package edu.uci.ics.hyracks.api.dataset;
 
 import edu.uci.ics.hyracks.api.comm.NetworkAddress;
-import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord.Status;
+import edu.uci.ics.hyracks.api.dataset.DatasetJobRecord.Status;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.job.IJobLifecycleListener;
 import edu.uci.ics.hyracks.api.job.JobId;
 
-public interface IDatasetDirectoryService {
+public interface IDatasetDirectoryService extends IJobLifecycleListener {
     public void registerResultPartitionLocation(JobId jobId, ResultSetId rsId, boolean orderedResult, int partition,
             int nPartitions, NetworkAddress networkAddress);
 
@@ -27,6 +28,8 @@
 
     public void reportResultPartitionFailure(JobId jobId, ResultSetId rsId, int partition);
 
+    public void reportJobFailure(JobId jobId);
+
     public Status getResultStatus(JobId jobId, ResultSetId rsId) throws HyracksDataException;
 
     public DatasetDirectoryRecord[] getResultPartitionLocations(JobId jobId, ResultSetId rsId,
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/ResultSetMetaData.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/ResultSetMetaData.java
new file mode 100644
index 0000000..e3ad69a
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/ResultSetMetaData.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataset;
+
+public class ResultSetMetaData {
+    private final boolean ordered;
+
+    private final DatasetDirectoryRecord[] records;
+
+    public ResultSetMetaData(boolean ordered, DatasetDirectoryRecord[] records) {
+        this.ordered = ordered;
+        this.records = records;
+    }
+
+    public boolean getOrderedResult() {
+        return ordered;
+    }
+
+    public DatasetDirectoryRecord[] getRecords() {
+        return records;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/deployment/DeploymentId.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/deployment/DeploymentId.java
new file mode 100644
index 0000000..b642bc7
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/deployment/DeploymentId.java
@@ -0,0 +1,33 @@
+package edu.uci.ics.hyracks.api.deployment;
+
+import java.io.Serializable;
+
+public class DeploymentId implements Serializable {
+    private static final long serialVersionUID = 1L;
+
+    private final String deploymentKey;
+
+    public DeploymentId(String deploymentKey) {
+        this.deploymentKey = deploymentKey;
+    }
+
+    public int hashCode() {
+        return deploymentKey.hashCode();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (o == this) {
+            return true;
+        }
+        if (!(o instanceof DeploymentId)) {
+            return false;
+        }
+        return ((DeploymentId) o).deploymentKey.equals(deploymentKey);
+    }
+
+    @Override
+    public String toString() {
+        return deploymentKey;
+    }
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/io/FileReference.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/io/FileReference.java
index 9e27077..ffe41d0 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/io/FileReference.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/io/FileReference.java
@@ -21,19 +21,26 @@
     private static final long serialVersionUID = 1L;
 
     private final File file;
+    private final IODeviceHandle dev;
 
     public FileReference(IODeviceHandle dev, String devRelPath) {
         file = new File(dev.getPath(), devRelPath);
+        this.dev = dev;
     }
 
     public FileReference(File file) {
         this.file = file;
+        this.dev = null;
     }
 
     public File getFile() {
-        return file;
+    	return file;
     }
 
+    public IODeviceHandle getDeviceHandle() {
+    	return dev;
+    }
+    
     @Override
     public String toString() {
         return file.getAbsolutePath();
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/IActivityClusterGraphGeneratorFactory.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/IActivityClusterGraphGeneratorFactory.java
index d801dd1..ae76455 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/IActivityClusterGraphGeneratorFactory.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/IActivityClusterGraphGeneratorFactory.java
@@ -21,6 +21,6 @@
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 
 public interface IActivityClusterGraphGeneratorFactory extends Serializable {
-    public IActivityClusterGraphGenerator createActivityClusterGraphGenerator(String appName, JobId jobId,
+    public IActivityClusterGraphGenerator createActivityClusterGraphGenerator(JobId jobId,
             ICCApplicationContext ccAppCtx, EnumSet<JobFlag> jobFlags) throws HyracksException;
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/IJobSerializerDeserializer.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/IJobSerializerDeserializer.java
new file mode 100644
index 0000000..d402cd3
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/IJobSerializerDeserializer.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.api.job;
+
+import java.io.Serializable;
+import java.net.URL;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+
+public interface IJobSerializerDeserializer {
+
+    public Object deserialize(byte[] bytes) throws HyracksException;
+
+    public byte[] serialize(Serializable job) throws HyracksException;
+
+    public Class<?> loadClass(String className) throws HyracksException;
+
+    public void addClassPathURLs(List<URL> binaryURLs) throws HyracksException;
+
+    public ClassLoader getClassLoader() throws HyracksException;
+
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/IJobSerializerDeserializerContainer.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/IJobSerializerDeserializerContainer.java
new file mode 100644
index 0000000..0ce2346
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/IJobSerializerDeserializerContainer.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.api.job;
+
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
+
+public interface IJobSerializerDeserializerContainer {
+
+    /**
+     * Get the IJobSerializerDeserializer implementation instance for a specific deployment id
+     * 
+     * @param deploymentId
+     * @return
+     */
+    public IJobSerializerDeserializer getJobSerializerDeerializer(DeploymentId deploymentId);
+
+    /**
+     * Add a deployment with the job serializer deserializer
+     * 
+     * @param deploymentId
+     * @param jobSerDe
+     */
+    public void addJobSerializerDeserializer(DeploymentId deploymentId, IJobSerializerDeserializer jobSerDe);
+
+    /**
+     * Remove a deployment
+     * 
+     * @param deploymentId
+     */
+    public void removeJobSerializerDeserializer(DeploymentId deploymentId);
+
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/JobSerializerDeserializer.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/JobSerializerDeserializer.java
new file mode 100644
index 0000000..0ea4309
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/JobSerializerDeserializer.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.api.job;
+
+import java.io.Serializable;
+import java.net.URL;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.util.JavaSerializationUtils;
+
+public class JobSerializerDeserializer implements IJobSerializerDeserializer {
+
+    @Override
+    public Object deserialize(byte[] jsBytes) throws HyracksException {
+        try {
+            return JavaSerializationUtils.deserialize(jsBytes);
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+
+    @Override
+    public byte[] serialize(Serializable obj) throws HyracksException {
+        try {
+            return JavaSerializationUtils.serialize(obj);
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+
+    @Override
+    public void addClassPathURLs(List<URL> binaryURLs) {
+        throw new UnsupportedOperationException("Not supported by " + this.getClass().getName());
+    }
+
+    @Override
+    public Class<?> loadClass(String className) throws HyracksException {
+        try {
+            return this.getClass().getClassLoader().loadClass(className);
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+
+    @Override
+    public ClassLoader getClassLoader() throws HyracksException {
+        return this.getClass().getClassLoader();
+    }
+
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/JobSerializerDeserializerContainer.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/JobSerializerDeserializerContainer.java
new file mode 100644
index 0000000..35a1e8b
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/JobSerializerDeserializerContainer.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.api.job;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
+
+public class JobSerializerDeserializerContainer implements IJobSerializerDeserializerContainer {
+
+    private IJobSerializerDeserializer defaultJobSerDe = new JobSerializerDeserializer();
+    private Map<DeploymentId, IJobSerializerDeserializer> jobSerializerDeserializerMap = new HashMap<DeploymentId, IJobSerializerDeserializer>();
+
+    @Override
+    public synchronized IJobSerializerDeserializer getJobSerializerDeerializer(DeploymentId deploymentId) {
+        if (deploymentId == null) {
+            return defaultJobSerDe;
+        }
+        IJobSerializerDeserializer jobSerDe = jobSerializerDeserializerMap.get(deploymentId);
+        return jobSerDe;
+    }
+
+    @Override
+    public synchronized void addJobSerializerDeserializer(DeploymentId deploymentId, IJobSerializerDeserializer jobSerDe) {
+        jobSerializerDeserializerMap.put(deploymentId, jobSerDe);
+    }
+
+    @Override
+    public synchronized void removeJobSerializerDeserializer(DeploymentId deploymentId) {
+        jobSerializerDeserializerMap.remove(deploymentId);
+    }
+
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/util/JavaSerializationUtils.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/util/JavaSerializationUtils.java
index 1185b5e..a3c8aed 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/util/JavaSerializationUtils.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/util/JavaSerializationUtils.java
@@ -33,6 +33,27 @@
         return baos.toByteArray();
     }
 
+    public static byte[] serialize(Serializable jobSpec, ClassLoader classLoader) throws IOException {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        ObjectOutputStream oos = new ObjectOutputStream(baos);
+        ClassLoader ctxCL = Thread.currentThread().getContextClassLoader();
+        try {
+            Thread.currentThread().setContextClassLoader(classLoader);
+            oos.writeObject(jobSpec);
+            return baos.toByteArray();
+        } finally {
+            Thread.currentThread().setContextClassLoader(ctxCL);
+        }
+    }
+
+    public static Object deserialize(byte[] bytes) throws IOException, ClassNotFoundException {
+        if (bytes == null) {
+            return null;
+        }
+        ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(bytes));
+        return ois.readObject();
+    }
+
     public static Object deserialize(byte[] bytes, ClassLoader classLoader) throws IOException, ClassNotFoundException {
         if (bytes == null) {
             return null;
@@ -47,6 +68,10 @@
         }
     }
 
+    public static Class<?> loadClass(String className) throws IOException, ClassNotFoundException {
+        return Class.forName(className);
+    }
+
     private static class ClassLoaderObjectInputStream extends ObjectInputStream {
         private ClassLoader classLoader;
 
diff --git a/hyracks/hyracks-cli/pom.xml b/hyracks/hyracks-cli/pom.xml
deleted file mode 100644
index 304c8ce..0000000
--- a/hyracks/hyracks-cli/pom.xml
+++ /dev/null
@@ -1,99 +0,0 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks</groupId>
-  <artifactId>hyracks-cli</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
-  <name>hyracks-cli</name>
-
-  <parent>
-    <groupId>edu.uci.ics.hyracks</groupId>
-    <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
-  </parent>
-
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>2.0.2</version>
-        <configuration>
-          <source>1.7</source>
-          <target>1.7</target>
-          <fork>true</fork>
-        </configuration>
-      </plugin>
-      <plugin>
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>javacc-maven-plugin</artifactId>
-        <version>2.6</version>
-        <executions>
-          <execution>
-            <id>javacc</id>
-            <goals>
-              <goal>javacc</goal>
-            </goals>
-            <configuration>
-              <isStatic>false</isStatic>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
-      <plugin>
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>appassembler-maven-plugin</artifactId>
-        <version>1.3</version>
-        <executions>
-          <execution>
-            <configuration>
-              <programs>
-                <program>
-                  <mainClass>edu.uci.ics.hyracks.cli.Main</mainClass>
-                  <name>hyrackscli</name>
-                </program>
-              </programs>
-              <repositoryLayout>flat</repositoryLayout>
-              <repositoryName>lib</repositoryName>
-            </configuration>
-            <phase>package</phase>
-            <goals>
-              <goal>assemble</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
-      <plugin>
-        <artifactId>maven-assembly-plugin</artifactId>
-        <version>2.2-beta-5</version>
-        <executions>
-          <execution>
-            <configuration>
-              <descriptors>
-                <descriptor>src/main/assembly/binary-assembly.xml</descriptor>
-              </descriptors>
-            </configuration>
-            <phase>package</phase>
-            <goals>
-              <goal>attached</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
-    </plugins>
-  </build>
-  <dependencies>
-  	<dependency>
-  		<groupId>jline</groupId>
-  		<artifactId>jline</artifactId>
-  		<version>0.9.94</version>
-  		<type>jar</type>
-  		<scope>compile</scope>
-  	</dependency>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<scope>compile</scope>
-  	</dependency>
-  </dependencies>
-</project>
diff --git a/hyracks/hyracks-cli/src/main/assembly/binary-assembly.xml b/hyracks/hyracks-cli/src/main/assembly/binary-assembly.xml
deleted file mode 100644
index 0500499..0000000
--- a/hyracks/hyracks-cli/src/main/assembly/binary-assembly.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<assembly>
-  <id>binary-assembly</id>
-  <formats>
-    <format>zip</format>
-    <format>dir</format>
-  </formats>
-  <includeBaseDirectory>false</includeBaseDirectory>
-  <fileSets>
-    <fileSet>
-      <directory>target/appassembler/bin</directory>
-      <outputDirectory>bin</outputDirectory>
-      <fileMode>0755</fileMode>
-    </fileSet>
-    <fileSet>
-      <directory>target/appassembler/lib</directory>
-      <outputDirectory>lib</outputDirectory>
-    </fileSet>
-  </fileSets>
-</assembly>
diff --git a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/CLI.java b/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/CLI.java
deleted file mode 100644
index f01c724..0000000
--- a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/CLI.java
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.cli;
-
-import java.io.IOException;
-
-import jline.ConsoleReader;
-
-public class CLI {
-    private static final String HYRACKS_PROMPT = "hyracks> ";
-    private static final String HYRAX_CONTINUE_PROMPT = "> ";
-    private final ConsoleReader reader;
-    private final Session session;
-
-    public CLI(String[] args) throws IOException {
-        reader = new ConsoleReader();
-        session = new Session();
-    }
-
-    public void run() throws IOException {
-        boolean eof = false;
-        while (true) {
-            String prompt = HYRACKS_PROMPT;
-            StringBuilder command = new StringBuilder();
-            while (true) {
-                String line = reader.readLine(prompt);
-                if (line == null) {
-                    eof = true;
-                    break;
-                }
-                prompt = HYRAX_CONTINUE_PROMPT;
-                line = line.trim();
-                command.append(line);
-                if ("".equals(line)) {
-                    break;
-                }
-                if (line.endsWith(";")) {
-                    break;
-                }
-            }
-            if (eof) {
-                break;
-            }
-            try {
-                CommandExecutor.execute(session, command.toString());
-            } catch (Exception e) {
-                e.printStackTrace();
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/CommandExecutor.java b/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/CommandExecutor.java
deleted file mode 100644
index 6bdd136..0000000
--- a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/CommandExecutor.java
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.cli;
-
-import java.io.StringReader;
-import java.util.List;
-
-import edu.uci.ics.hyracks.cli.commands.Command;
-
-public class CommandExecutor {
-    public static void execute(Session session, String command) throws Exception {
-        CLIParser parser = new CLIParser(new StringReader(command));
-        List<Command> cmds = parser.Commands();
-        for (Command cmd : cmds) {
-            cmd.run(session);
-        }
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/Main.java b/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/Main.java
deleted file mode 100644
index 5f7ef0b..0000000
--- a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/Main.java
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.cli;
-
-public class Main {
-    public static void main(String[] args) throws Exception {
-        CLI cli = new CLI(args);
-        cli.run();
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/Session.java b/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/Session.java
deleted file mode 100644
index f15b1bb..0000000
--- a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/Session.java
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.cli;
-
-import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
-
-public class Session {
-    private IHyracksClientConnection connection;
-
-    public void setConnection(IHyracksClientConnection connection) {
-        this.connection = connection;
-    }
-
-    public IHyracksClientConnection getConnection() {
-        return connection;
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/Command.java b/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/Command.java
deleted file mode 100644
index ee5849b..0000000
--- a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/Command.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package edu.uci.ics.hyracks.cli.commands;
-
-import edu.uci.ics.hyracks.cli.Session;
-
-public abstract class Command {
-    public abstract void run(Session session) throws Exception;
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/ConnectCommand.java b/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/ConnectCommand.java
deleted file mode 100644
index 168280b..0000000
--- a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/ConnectCommand.java
+++ /dev/null
@@ -1,28 +0,0 @@
-package edu.uci.ics.hyracks.cli.commands;
-
-import edu.uci.ics.hyracks.api.client.HyracksConnection;
-import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
-import edu.uci.ics.hyracks.cli.Session;
-
-public class ConnectCommand extends Command {
-    private String host;
-
-    private int port;
-
-    public ConnectCommand(String hostPortStr) {
-        int idx = hostPortStr.indexOf(':');
-        host = hostPortStr;
-        port = 1098;
-        if (idx != -1) {
-            host = hostPortStr.substring(0, idx);
-            port = Integer.valueOf(hostPortStr.substring(idx + 1));
-        }
-    }
-
-    @Override
-    public void run(Session session) throws Exception {
-        System.err.println("Connecting to host: " + host + ", port: " + port);
-        IHyracksClientConnection conn = new HyracksConnection(host, port);
-        session.setConnection(conn);
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/CreateApplicationCommand.java b/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/CreateApplicationCommand.java
deleted file mode 100644
index 7b35ee5..0000000
--- a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/CreateApplicationCommand.java
+++ /dev/null
@@ -1,27 +0,0 @@
-package edu.uci.ics.hyracks.cli.commands;
-
-import java.io.File;
-
-import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
-import edu.uci.ics.hyracks.cli.Session;
-
-public class CreateApplicationCommand extends Command {
-    private String appName;
-
-    private File harFile;
-
-    public CreateApplicationCommand(String appName, File harFile) {
-        this.appName = appName;
-        this.harFile = harFile;
-    }
-
-    @Override
-    public void run(Session session) throws Exception {
-        IHyracksClientConnection hcc = session.getConnection();
-        if (hcc == null) {
-            throw new RuntimeException("Not connected to Hyracks Cluster Controller");
-        }
-        System.err.println("Creating application: " + appName + " with har: " + harFile.getAbsolutePath());
-        hcc.createApplication(appName, harFile);
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/DestroyApplicationCommand.java b/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/DestroyApplicationCommand.java
deleted file mode 100644
index 03aed1e..0000000
--- a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/DestroyApplicationCommand.java
+++ /dev/null
@@ -1,22 +0,0 @@
-package edu.uci.ics.hyracks.cli.commands;
-
-import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
-import edu.uci.ics.hyracks.cli.Session;
-
-public class DestroyApplicationCommand extends Command {
-    private String appName;
-
-    public DestroyApplicationCommand(String appName) {
-        this.appName = appName;
-    }
-
-    @Override
-    public void run(Session session) throws Exception {
-        IHyracksClientConnection hcc = session.getConnection();
-        if (hcc == null) {
-            throw new RuntimeException("Not connected to Hyracks Cluster Controller");
-        }
-        System.err.println("Destroying application: " + appName);
-        hcc.destroyApplication(appName);
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/DisconnectCommand.java b/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/DisconnectCommand.java
deleted file mode 100644
index facf0f1..0000000
--- a/hyracks/hyracks-cli/src/main/java/edu/uci/ics/hyracks/cli/commands/DisconnectCommand.java
+++ /dev/null
@@ -1,11 +0,0 @@
-package edu.uci.ics.hyracks.cli.commands;
-
-import edu.uci.ics.hyracks.cli.Session;
-
-public class DisconnectCommand extends Command {
-    @Override
-    public void run(Session session) throws Exception {
-        System.err.println("Disconnecting...");
-        session.setConnection(null);
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-cli/src/main/javacc/cli.jj b/hyracks/hyracks-cli/src/main/javacc/cli.jj
deleted file mode 100644
index 0f386cb..0000000
--- a/hyracks/hyracks-cli/src/main/javacc/cli.jj
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-options {
-    STATIC = false;
-    IGNORE_CASE = true;
-}
-
-PARSER_BEGIN(CLIParser)
-
-package edu.uci.ics.hyracks.cli;
-
-import java.io.*;
-import java.util.*;
-import edu.uci.ics.hyracks.cli.commands.*;
-
-class CLIParser {
-    private String unquote(String s) {
-        return s.substring(1, s.length() - 1);
-    }
-}
-
-PARSER_END(CLIParser)
-
-List<Command> Commands():
-{
-    List<Command> result = new ArrayList<Command>();
-    Command cmd = null;
-} {
-    (
-        (
-            cmd = ConnectCommand()
-            | cmd = DisconnectCommand()
-            | cmd = CreateApplicationCommand()
-            | cmd = DestroyApplicationCommand()
-        ) ";" {
-            result.add(cmd);
-        }
-    )* <EOF> {
-        return result;
-    }
-}
-
-protected Command ConnectCommand():
-{
-    Token t;
-} {
-    "connect" "to" t = <StringLiteral> {
-        return new ConnectCommand(unquote(t.image));
-    }
-}
-
-protected Command CreateApplicationCommand():
-{
-    Token a;
-    Token f;
-} {
-    "create" "application" a = <Identifier> f = <StringLiteral> {
-        return new CreateApplicationCommand(a.image, new File(unquote(f.image)));
-    }
-}
-
-protected Command DestroyApplicationCommand():
-{
-    Token a;
-} {
-    "destroy" "application" a = <Identifier> {
-        return new DestroyApplicationCommand(a.image);
-    }
-}
-
-protected Command DisconnectCommand():
-{
-    Token t;
-} {
-    "disconnect" {
-        return new DisconnectCommand();
-    }
-}
-
-<DEFAULT>
-TOKEN : {
-    <StringLiteral: (("\"" (~["\"", "\n"])* "\"") | ("'" (~["'", "\n"])* "'"))>
-    | <Identifier: <Letter> (<Letter> | <Digit> | <Extender>)*>
-}
-
-SPECIAL_TOKEN :
-{
- < WhitespaceChar : ["\t", "\r", "\n", " "] >
-}
-
-TOKEN :
-{
- < #Letter : (<BaseChar> | <Ideographic>) >
-}
-
-TOKEN :
-{
- < #BaseChar : ["\u0041" - "\u005a", "\u0061" - "\u007a", "\u00c0" - "\u00d6", "\u00d8" - "\u00f6", "\u00f8" - "\u00ff", "\u0100" - "\u0131", "\u0134" - "\u013e", "\u0141" - "\u0148", "\u014a" - "\u017e", "\u0180" - "\u01c3", "\u01cd" - "\u01f0", "\u01f4" - "\u01f5", "\u01fa" - "\u0217", "\u0250" - "\u02a8", "\u02bb" - "\u02c1", "\u0386", "\u0388" - "\u038a", "\u038c", "\u038e" - "\u03a1", "\u03a3" - "\u03ce", "\u03d0" - "\u03d6", "\u03da", "\u03dc", "\u03de", "\u03e0", "\u03e2" - "\u03f3", "\u0401" - "\u040c", "\u040e" - "\u044f", "\u0451" - "\u045c", "\u045e" - "\u0481", "\u0490" - "\u04c4", "\u04c7" - "\u04c8", "\u04cb" - "\u04cc", "\u04d0" - "\u04eb", "\u04ee" - "\u04f5", "\u04f8" - "\u04f9", "\u0531" - "\u0556", "\u0559", "\u0561" - "\u0586", "\u05d0" - "\u05ea", "\u05f0" - "\u05f2", "\u0621" - "\u063a", "\u0641" - "\u064a", "\u0671" - "\u06b7", "\u06ba" - "\u06be", "\u06c0" - "\u06ce", "\u06d0" - "\u06d3", "\u06d5", "\u06e5" - "\u06e6", "\u0905" - "\u0939", "\u093d", "\u0958" - "\u0961", "\u0985" - "\u098c", "\u098f" - "\u0990", "\u0993" - "\u09a8", "\u09aa" - "\u09b0", "\u09b2", "\u09b6" - "\u09b9", "\u09dc" - "\u09dd", "\u09df" - "\u09e1", "\u09f0" - "\u09f1", "\u0a05" - "\u0a0a", "\u0a0f" - "\u0a10", "\u0a13" - "\u0a28", "\u0a2a" - "\u0a30", "\u0a32" - "\u0a33", "\u0a35" - "\u0a36", "\u0a38" - "\u0a39", "\u0a59" - "\u0a5c", "\u0a5e", "\u0a72" - "\u0a74", "\u0a85" - "\u0a8b", "\u0a8d", "\u0a8f" - "\u0a91", "\u0a93" - "\u0aa8", "\u0aaa" - "\u0ab0", "\u0ab2" - "\u0ab3", "\u0ab5" - "\u0ab9", "\u0abd", "\u0ae0", "\u0b05" - "\u0b0c", "\u0b0f" - "\u0b10", "\u0b13" - "\u0b28", "\u0b2a" - "\u0b30", "\u0b32" - "\u0b33", "\u0b36" - "\u0b39", "\u0b3d", "\u0b5c" - "\u0b5d", "\u0b5f" - "\u0b61", "\u0b85" - "\u0b8a", "\u0b8e" - "\u0b90", "\u0b92" - "\u0b95", "\u0b99" - "\u0b9a", "\u0b9c", "\u0b9e" - "\u0b9f", "\u0ba3" - "\u0ba4", "\u0ba8" - "\u0baa", "\u0bae" - "\u0bb5", "\u0bb7" - "\u0bb9", "\u0c05" - "\u0c0c", "\u0c0e" - "\u0c10", "\u0c12" - "\u0c28", "\u0c2a" - "\u0c33", "\u0c35" - "\u0c39", "\u0c60" - "\u0c61", "\u0c85" - "\u0c8c", "\u0c8e" - "\u0c90", "\u0c92" - "\u0ca8", "\u0caa" - "\u0cb3", "\u0cb5" - "\u0cb9", "\u0cde", "\u0ce0" - "\u0ce1", "\u0d05" - "\u0d0c", "\u0d0e" - "\u0d10", "\u0d12" - "\u0d28", "\u0d2a" - "\u0d39", "\u0d60" - "\u0d61", "\u0e01" - "\u0e2e", "\u0e30", "\u0e32" - "\u0e33", "\u0e40" - "\u0e45", "\u0e81" - "\u0e82", "\u0e84", "\u0e87" - "\u0e88", "\u0e8a", "\u0e8d", "\u0e94" - "\u0e97", "\u0e99" - "\u0e9f", "\u0ea1" - "\u0ea3", "\u0ea5", "\u0ea7", "\u0eaa" - "\u0eab", "\u0ead" - "\u0eae", "\u0eb0", "\u0eb2" - "\u0eb3", "\u0ebd", "\u0ec0" - "\u0ec4", "\u0f40" - "\u0f47", "\u0f49" - "\u0f69", "\u10a0" - "\u10c5", "\u10d0" - "\u10f6", "\u1100", "\u1102" - "\u1103", "\u1105" - "\u1107", "\u1109", "\u110b" - "\u110c", "\u110e" - "\u1112", "\u113c", "\u113e", "\u1140", "\u114c", "\u114e", "\u1150", "\u1154" - "\u1155", "\u1159", "\u115f" - "\u1161", "\u1163", "\u1165", "\u1167", "\u1169", "\u116d" - "\u116e", "\u1172" - "\u1173", "\u1175", "\u119e", "\u11a8", "\u11ab", "\u11ae" - "\u11af", "\u11b7" - "\u11b8", "\u11ba", "\u11bc" - "\u11c2", "\u11eb", "\u11f0", "\u11f9", "\u1e00" - "\u1e9b", "\u1ea0" - "\u1ef9", "\u1f00" - "\u1f15", "\u1f18" - "\u1f1d", "\u1f20" - "\u1f45", "\u1f48" - "\u1f4d", "\u1f50" - "\u1f57", "\u1f59", "\u1f5b", "\u1f5d", "\u1f5f" - "\u1f7d", "\u1f80" - "\u1fb4", "\u1fb6" - "\u1fbc", "\u1fbe", "\u1fc2" - "\u1fc4", "\u1fc6" - "\u1fcc", "\u1fd0" - "\u1fd3", "\u1fd6" - "\u1fdb", "\u1fe0" - "\u1fec", "\u1ff2" - "\u1ff4", "\u1ff6" - "\u1ffc", "\u2126", "\u212a" - "\u212b", "\u212e", "\u2180" - "\u2182", "\u3041" - "\u3094", "\u30a1" - "\u30fa", "\u3105" - "\u312c", "\uac00" - "\ud7a3"] >
-}
-
-TOKEN :
-{
- < #Ideographic : ["\u4e00" - "\u9fa5", "\u3007", "\u3021" - "\u3029"] >
-}
-
-TOKEN :
-{
- < #CombiningChar : ["\u0300" - "\u0345", "\u0360" - "\u0361", "\u0483" - "\u0486", "\u0591" - "\u05a1", "\u05a3" - "\u05b9", "\u05bb" - "\u05bd", "\u05bf", "\u05c1" - "\u05c2", "\u05c4", "\u064b" - "\u0652", "\u0670", "\u06d6" - "\u06dc", "\u06dd" - "\u06df", "\u06e0" - "\u06e4", "\u06e7" - "\u06e8", "\u06ea" - "\u06ed", "\u0901" - "\u0903", "\u093c", "\u093e" - "\u094c", "\u094d", "\u0951" - "\u0954", "\u0962" - "\u0963", "\u0981" - "\u0983", "\u09bc", "\u09be", "\u09bf", "\u09c0" - "\u09c4", "\u09c7" - "\u09c8", "\u09cb" - "\u09cd", "\u09d7", "\u09e2" - "\u09e3", "\u0a02", "\u0a3c", "\u0a3e", "\u0a3f", "\u0a40" - "\u0a42", "\u0a47" - "\u0a48", "\u0a4b" - "\u0a4d", "\u0a70" - "\u0a71", "\u0a81" - "\u0a83", "\u0abc", "\u0abe" - "\u0ac5", "\u0ac7" - "\u0ac9", "\u0acb" - "\u0acd", "\u0b01" - "\u0b03", "\u0b3c", "\u0b3e" - "\u0b43", "\u0b47" - "\u0b48", "\u0b4b" - "\u0b4d", "\u0b56" - "\u0b57", "\u0b82" - "\u0b83", "\u0bbe" - "\u0bc2", "\u0bc6" - "\u0bc8", "\u0bca" - "\u0bcd", "\u0bd7", "\u0c01" - "\u0c03", "\u0c3e" - "\u0c44", "\u0c46" - "\u0c48", "\u0c4a" - "\u0c4d", "\u0c55" - "\u0c56", "\u0c82" - "\u0c83", "\u0cbe" - "\u0cc4", "\u0cc6" - "\u0cc8", "\u0cca" - "\u0ccd", "\u0cd5" - "\u0cd6", "\u0d02" - "\u0d03", "\u0d3e" - "\u0d43", "\u0d46" - "\u0d48", "\u0d4a" - "\u0d4d", "\u0d57", "\u0e31", "\u0e34" - "\u0e3a", "\u0e47" - "\u0e4e", "\u0eb1", "\u0eb4" - "\u0eb9", "\u0ebb" - "\u0ebc", "\u0ec8" - "\u0ecd", "\u0f18" - "\u0f19", "\u0f35", "\u0f37", "\u0f39", "\u0f3e", "\u0f3f", "\u0f71" - "\u0f84", "\u0f86" - "\u0f8b", "\u0f90" - "\u0f95", "\u0f97", "\u0f99" - "\u0fad", "\u0fb1" - "\u0fb7", "\u0fb9", "\u20d0" - "\u20dc", "\u20e1", "\u302a" - "\u302f", "\u3099", "\u309a"] >
-}
-
-TOKEN :
-{
- < #Digit : ["\u0030" - "\u0039", "\u0660" - "\u0669", "\u06f0" - "\u06f9", "\u0966" - "\u096f", "\u09e6" - "\u09ef", "\u0a66" - "\u0a6f", "\u0ae6" - "\u0aef", "\u0b66" - "\u0b6f", "\u0be7" - "\u0bef", "\u0c66" - "\u0c6f", "\u0ce6" - "\u0cef", "\u0d66" - "\u0d6f", "\u0e50" - "\u0e59", "\u0ed0" - "\u0ed9", "\u0f20" - "\u0f29"] >
-}
-
-TOKEN :
-{
- < #Extender : ["\u00b7", "\u02d0", "\u02d1", "\u0387", "\u0640", "\u0e46", "\u0ec6", "\u3005", "\u3031" - "\u3035", "\u309d" - "\u309e", "\u30fc" - "\u30fe"] >
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-client/pom.xml b/hyracks/hyracks-client/pom.xml
index c86b0d3..4febc6e 100644
--- a/hyracks/hyracks-client/pom.xml
+++ b/hyracks/hyracks-client/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -25,22 +25,22 @@
  <dependency>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-api</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
  </dependency>
  <dependency>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-net</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
  </dependency>
  <dependency>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-comm</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
  </dependency>
   <dependency>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-dataflow-common</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
  </dependency>
   </dependencies>
 </project>
diff --git a/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/HyracksDatasetReader.java b/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/HyracksDatasetReader.java
index 78bcf20..6419983 100644
--- a/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/HyracksDatasetReader.java
+++ b/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/HyracksDatasetReader.java
@@ -116,7 +116,7 @@
             }
         }
 
-        while (readSize <= 0 && !((lastReadPartition == knownRecords.length - 1) && (lastMonitor.eosReached()))) {
+        while (readSize <= 0 && !(isLastPartitionReadComplete())) {
             synchronized (lastMonitor) {
                 while (lastMonitor.getNFramesAvailable() <= 0 && !lastMonitor.eosReached()) {
                     try {
@@ -127,7 +127,7 @@
                 }
             }
 
-            if (lastMonitor.getNFramesAvailable() <= 0 && lastMonitor.eosReached()) {
+            if (isPartitionReadComplete(lastMonitor)) {
                 knownRecords[lastReadPartition].readEOS();
                 if ((lastReadPartition == knownRecords.length - 1)) {
                     break;
@@ -182,6 +182,14 @@
         return false;
     }
 
+    private boolean isPartitionReadComplete(IDatasetInputChannelMonitor monitor) {
+        return (monitor.getNFramesAvailable() <= 0) && (monitor.eosReached());
+    }
+
+    private boolean isLastPartitionReadComplete() {
+        return ((lastReadPartition == knownRecords.length - 1) && isPartitionReadComplete(lastMonitor));
+    }
+
     private SocketAddress getSocketAddress(DatasetDirectoryRecord addr) throws UnknownHostException {
         NetworkAddress netAddr = addr.getNetworkAddress();
         return new InetSocketAddress(InetAddress.getByAddress(netAddr.getIpAddress()), netAddr.getPort());
diff --git a/hyracks/hyracks-comm/pom.xml b/hyracks/hyracks-comm/pom.xml
index 2720f95..647faa6 100644
--- a/hyracks/hyracks-comm/pom.xml
+++ b/hyracks/hyracks-comm/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -25,12 +25,12 @@
  <dependency>
  	<groupId>edu.uci.ics.hyracks</groupId>
  	<artifactId>hyracks-api</artifactId>
- 	<version>0.2.4-SNAPSHOT</version>
+ 	<version>0.2.5-SNAPSHOT</version>
  </dependency>
   <dependency>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-net</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
  </dependency>
   </dependencies>
 </project>
diff --git a/hyracks/hyracks-control/hyracks-control-cc/pom.xml b/hyracks/hyracks-control/hyracks-control-cc/pom.xml
index 1730595..2af1a85 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/pom.xml
+++ b/hyracks/hyracks-control/hyracks-control-cc/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-control</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -26,7 +26,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/ClusterControllerService.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/ClusterControllerService.java
index 82457fe..9b8a996 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/ClusterControllerService.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/ClusterControllerService.java
@@ -18,7 +18,6 @@
 import java.io.FileReader;
 import java.net.InetSocketAddress;
 import java.util.HashMap;
-import java.util.Hashtable;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.Set;
@@ -32,14 +31,16 @@
 
 import org.xml.sax.InputSource;
 
+import edu.uci.ics.hyracks.api.application.ICCApplicationEntryPoint;
 import edu.uci.ics.hyracks.api.client.ClusterControllerInfo;
 import edu.uci.ics.hyracks.api.client.HyracksClientInterfaceFunctions;
 import edu.uci.ics.hyracks.api.client.NodeControllerInfo;
 import edu.uci.ics.hyracks.api.comm.NetworkAddress;
 import edu.uci.ics.hyracks.api.context.ICCContext;
 import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord;
-import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord.Status;
+import edu.uci.ics.hyracks.api.dataset.DatasetJobRecord.Status;
 import edu.uci.ics.hyracks.api.dataset.IDatasetDirectoryService;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.job.JobStatus;
 import edu.uci.ics.hyracks.api.topology.ClusterTopology;
@@ -48,11 +49,9 @@
 import edu.uci.ics.hyracks.control.cc.dataset.DatasetDirectoryService;
 import edu.uci.ics.hyracks.control.cc.job.JobRun;
 import edu.uci.ics.hyracks.control.cc.web.WebServer;
-import edu.uci.ics.hyracks.control.cc.work.ApplicationCreateWork;
-import edu.uci.ics.hyracks.control.cc.work.ApplicationDestroyWork;
 import edu.uci.ics.hyracks.control.cc.work.ApplicationMessageWork;
-import edu.uci.ics.hyracks.control.cc.work.ApplicationStartWork;
-import edu.uci.ics.hyracks.control.cc.work.ApplicationStateChangeWork;
+import edu.uci.ics.hyracks.control.cc.work.CliDeployBinaryWork;
+import edu.uci.ics.hyracks.control.cc.work.CliUnDeployBinaryWork;
 import edu.uci.ics.hyracks.control.cc.work.GetDatasetDirectoryServiceInfoWork;
 import edu.uci.ics.hyracks.control.cc.work.GetIpAddressNodeNameMapWork;
 import edu.uci.ics.hyracks.control.cc.work.GetJobStatusWork;
@@ -62,6 +61,7 @@
 import edu.uci.ics.hyracks.control.cc.work.JobStartWork;
 import edu.uci.ics.hyracks.control.cc.work.JobletCleanupNotificationWork;
 import edu.uci.ics.hyracks.control.cc.work.NodeHeartbeatWork;
+import edu.uci.ics.hyracks.control.cc.work.NotifyDeployBinaryWork;
 import edu.uci.ics.hyracks.control.cc.work.RegisterNodeWork;
 import edu.uci.ics.hyracks.control.cc.work.RegisterPartitionAvailibilityWork;
 import edu.uci.ics.hyracks.control.cc.work.RegisterPartitionRequestWork;
@@ -77,6 +77,7 @@
 import edu.uci.ics.hyracks.control.common.AbstractRemoteService;
 import edu.uci.ics.hyracks.control.common.context.ServerContext;
 import edu.uci.ics.hyracks.control.common.controllers.CCConfig;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentRun;
 import edu.uci.ics.hyracks.control.common.ipc.CCNCFunctions;
 import edu.uci.ics.hyracks.control.common.ipc.CCNCFunctions.Function;
 import edu.uci.ics.hyracks.control.common.logs.LogFile;
@@ -104,14 +105,14 @@
 
     private final Map<String, Set<String>> ipAddressNodeNameMap;
 
-    private final Map<String, CCApplicationContext> applications;
-
     private final ServerContext serverCtx;
 
     private final WebServer webServer;
 
     private ClusterControllerInfo info;
 
+    private CCApplicationContext appCtx;
+
     private final Map<JobId, JobRun> activeRunMap;
 
     private final Map<JobId, JobRun> runMapArchive;
@@ -130,13 +131,14 @@
 
     private long jobCounter;
 
+    private final Map<DeploymentId, DeploymentRun> deploymentRunMap;
+
     public ClusterControllerService(final CCConfig ccConfig) throws Exception {
         this.ccConfig = ccConfig;
         File jobLogFolder = new File(ccConfig.ccRoot, "logs/jobs");
         jobLog = new LogFile(jobLogFolder);
         nodeRegistry = new LinkedHashMap<String, NodeControllerState>();
         ipAddressNodeNameMap = new HashMap<String, Set<String>>();
-        applications = new Hashtable<String, CCApplicationContext>();
         serverCtx = new ServerContext(ServerContext.ServerType.CLUSTER_CONTROLLER, new File(ccConfig.ccRoot));
         executor = Executors.newCachedThreadPool();
         IIPCI ccIPCI = new ClusterControllerIPCI();
@@ -175,8 +177,10 @@
             }
         };
         sweeper = new DeadNodeSweeper();
-        datasetDirectoryService = new DatasetDirectoryService();
+        datasetDirectoryService = new DatasetDirectoryService(ccConfig.jobHistorySize);
         jobCounter = 0;
+
+        deploymentRunMap = new HashMap<DeploymentId, DeploymentRun>();
     }
 
     private static ClusterTopology computeClusterTopology(CCConfig ccConfig) throws Exception {
@@ -204,9 +208,23 @@
                 webServer.getListeningPort());
         timer.schedule(sweeper, 0, ccConfig.heartbeatPeriod);
         jobLog.open();
+        startApplication();
         LOGGER.log(Level.INFO, "Started ClusterControllerService");
     }
 
+    private void startApplication() throws Exception {
+        appCtx = new CCApplicationContext(serverCtx, ccContext);
+        appCtx.addJobLifecycleListener(datasetDirectoryService);
+        String className = ccConfig.appCCMainClass;
+        if (className != null) {
+            Class<?> c = Class.forName(className);
+            ICCApplicationEntryPoint aep = (ICCApplicationEntryPoint) c.newInstance();
+            String[] args = ccConfig.appArgs == null ? null : ccConfig.appArgs.toArray(new String[ccConfig.appArgs
+                    .size()]);
+            aep.start(appCtx, args);
+        }
+    }
+
     @Override
     public void stop() throws Exception {
         LOGGER.log(Level.INFO, "Stopping ClusterControllerService");
@@ -226,10 +244,6 @@
         return ccContext;
     }
 
-    public Map<String, CCApplicationContext> getApplicationMap() {
-        return applications;
-    }
-
     public Map<JobId, JobRun> getActiveRunMap() {
         return activeRunMap;
     }
@@ -262,6 +276,10 @@
         return ccConfig;
     }
 
+    public CCApplicationContext getApplicationContext() {
+        return appCtx;
+    }
+
     private JobId createJobId() {
         return new JobId(jobCounter++);
     }
@@ -307,27 +325,6 @@
                     return;
                 }
 
-                case CREATE_APPLICATION: {
-                    HyracksClientInterfaceFunctions.CreateApplicationFunction caf = (HyracksClientInterfaceFunctions.CreateApplicationFunction) fn;
-                    workQueue.schedule(new ApplicationCreateWork(ClusterControllerService.this, caf.getAppName(),
-                            new IPCResponder<Object>(handle, mid)));
-                    return;
-                }
-
-                case START_APPLICATION: {
-                    HyracksClientInterfaceFunctions.StartApplicationFunction saf = (HyracksClientInterfaceFunctions.StartApplicationFunction) fn;
-                    workQueue.schedule(new ApplicationStartWork(ClusterControllerService.this, saf.getAppName(),
-                            new IPCResponder<Object>(handle, mid)));
-                    return;
-                }
-
-                case DESTROY_APPLICATION: {
-                    HyracksClientInterfaceFunctions.DestroyApplicationFunction daf = (HyracksClientInterfaceFunctions.DestroyApplicationFunction) fn;
-                    workQueue.schedule(new ApplicationDestroyWork(ClusterControllerService.this, daf.getAppName(),
-                            new IPCResponder<Object>(handle, mid)));
-                    return;
-                }
-
                 case GET_JOB_STATUS: {
                     HyracksClientInterfaceFunctions.GetJobStatusFunction gjsf = (HyracksClientInterfaceFunctions.GetJobStatusFunction) fn;
                     workQueue.schedule(new GetJobStatusWork(ClusterControllerService.this, gjsf.getJobId(),
@@ -338,7 +335,7 @@
                 case START_JOB: {
                     HyracksClientInterfaceFunctions.StartJobFunction sjf = (HyracksClientInterfaceFunctions.StartJobFunction) fn;
                     JobId jobId = createJobId();
-                    workQueue.schedule(new JobStartWork(ClusterControllerService.this, sjf.getAppName(), sjf
+                    workQueue.schedule(new JobStartWork(ClusterControllerService.this, sjf.getDeploymentId(), sjf
                             .getACGGFBytes(), sjf.getJobFlags(), jobId, new IPCResponder<JobId>(handle, mid)));
                     return;
                 }
@@ -385,6 +382,20 @@
                     }
                     return;
                 }
+
+                case CLI_DEPLOY_BINARY: {
+                    HyracksClientInterfaceFunctions.CliDeployBinaryFunction dbf = (HyracksClientInterfaceFunctions.CliDeployBinaryFunction) fn;
+                    workQueue.schedule(new CliDeployBinaryWork(ClusterControllerService.this, dbf.getBinaryURLs(), dbf
+                            .getDeploymentId(), new IPCResponder<DeploymentId>(handle, mid)));
+                    return;
+                }
+
+                case CLI_UNDEPLOY_BINARY: {
+                    HyracksClientInterfaceFunctions.CliUnDeployBinaryFunction udbf = (HyracksClientInterfaceFunctions.CliUnDeployBinaryFunction) fn;
+                    workQueue.schedule(new CliUnDeployBinaryWork(ClusterControllerService.this, udbf.getDeploymentId(),
+                            new IPCResponder<DeploymentId>(handle, mid)));
+                    return;
+                }
             }
             try {
                 handle.send(mid, null, new IllegalArgumentException("Unknown function " + fn.getFunctionId()));
@@ -426,6 +437,13 @@
                     return;
                 }
 
+                case NOTIFY_DEPLOY_BINARY: {
+                    CCNCFunctions.NotifyDeployBinaryFunction ndbf = (CCNCFunctions.NotifyDeployBinaryFunction) fn;
+                    workQueue.schedule(new NotifyDeployBinaryWork(ClusterControllerService.this,
+                            ndbf.getDeploymentId(), ndbf.getNodeId(), ndbf.getDeploymentStatus()));
+                    return;
+                }
+
                 case REPORT_PROFILE: {
                     CCNCFunctions.ReportProfileFunction rpf = (CCNCFunctions.ReportProfileFunction) fn;
                     workQueue.schedule(new ReportProfilesWork(ClusterControllerService.this, rpf.getProfiles()));
@@ -481,15 +499,10 @@
                     return;
                 }
 
-                case APPLICATION_STATE_CHANGE_RESPONSE: {
-                    CCNCFunctions.ApplicationStateChangeResponseFunction astrf = (CCNCFunctions.ApplicationStateChangeResponseFunction) fn;
-                    workQueue.schedule(new ApplicationStateChangeWork(ClusterControllerService.this, astrf));
-                    return;
-                }
                 case SEND_APPLICATION_MESSAGE: {
                     CCNCFunctions.SendApplicationMessageFunction rsf = (CCNCFunctions.SendApplicationMessageFunction) fn;
                     workQueue.schedule(new ApplicationMessageWork(ClusterControllerService.this, rsf.getMessage(), rsf
-                            .getAppName(), rsf.getNodeId()));
+                            .getDeploymentId(), rsf.getNodeId()));
                     return;
                 }
 
@@ -513,4 +526,32 @@
             LOGGER.warning("Unknown function: " + fn.getFunctionId());
         }
     }
+
+    /**
+     * Add a deployment run
+     * 
+     * @param deploymentKey
+     * @param nodeControllerIds
+     */
+    public synchronized void addDeploymentRun(DeploymentId deploymentKey, DeploymentRun dRun) {
+        deploymentRunMap.put(deploymentKey, dRun);
+    }
+
+    /**
+     * Get a deployment run
+     * 
+     * @param deploymentKey
+     */
+    public synchronized DeploymentRun getDeploymentRun(DeploymentId deploymentKey) {
+        return deploymentRunMap.get(deploymentKey);
+    }
+
+    /**
+     * Remove a deployment run
+     * 
+     * @param deploymentKey
+     */
+    public synchronized void removeDeploymentRun(DeploymentId deploymentKey) {
+        deploymentRunMap.remove(deploymentKey);
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/application/CCApplicationContext.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/application/CCApplicationContext.java
index 24dfa7c..7e1581a 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/application/CCApplicationContext.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/application/CCApplicationContext.java
@@ -22,13 +22,11 @@
 import java.util.Set;
 
 import edu.uci.ics.hyracks.api.application.ICCApplicationContext;
-import edu.uci.ics.hyracks.api.application.ICCBootstrap;
 import edu.uci.ics.hyracks.api.context.ICCContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.api.job.IActivityClusterGraphGeneratorFactory;
 import edu.uci.ics.hyracks.api.job.IJobLifecycleListener;
 import edu.uci.ics.hyracks.api.job.JobId;
-import edu.uci.ics.hyracks.api.util.JavaSerializationUtils;
 import edu.uci.ics.hyracks.control.common.application.ApplicationContext;
 import edu.uci.ics.hyracks.control.common.context.ServerContext;
 import edu.uci.ics.hyracks.control.common.work.IResultCallback;
@@ -44,42 +42,18 @@
 
     private List<IJobLifecycleListener> jobLifecycleListeners;
 
-    public CCApplicationContext(ServerContext serverCtx, ICCContext ccContext, String appName) throws IOException {
-        super(serverCtx, appName);
+    public CCApplicationContext(ServerContext serverCtx, ICCContext ccContext) throws IOException {
+        super(serverCtx);
         this.ccContext = ccContext;
         initPendingNodeIds = new HashSet<String>();
         deinitPendingNodeIds = new HashSet<String>();
         jobLifecycleListeners = new ArrayList<IJobLifecycleListener>();
     }
 
-    @Override
-    protected void start() throws Exception {
-        ((ICCBootstrap) bootstrap).setApplicationContext(this);
-        bootstrap.start();
-    }
-
     public ICCContext getCCContext() {
         return ccContext;
     }
 
-    public IActivityClusterGraphGeneratorFactory createActivityClusterGraphGeneratorFactory(byte[] bytes)
-            throws HyracksException {
-        try {
-            return (IActivityClusterGraphGeneratorFactory) JavaSerializationUtils.deserialize(bytes, getClassLoader());
-        } catch (IOException e) {
-            throw new HyracksException(e);
-        } catch (ClassNotFoundException e) {
-            throw new HyracksException(e);
-        }
-    }
-
-    @Override
-    protected void stop() throws Exception {
-        if (bootstrap != null) {
-            bootstrap.stop();
-        }
-    }
-
     @Override
     public void setDistributedState(Serializable state) {
         this.distributedState = state;
@@ -108,28 +82,4 @@
             l.notifyJobCreation(jobId, acggf);
         }
     }
-
-    public Set<String> getInitializationPendingNodeIds() {
-        return initPendingNodeIds;
-    }
-
-    public Set<String> getDeinitializationPendingNodeIds() {
-        return deinitPendingNodeIds;
-    }
-
-    public IResultCallback<Object> getInitializationCallback() {
-        return initializationCallback;
-    }
-
-    public void setInitializationCallback(IResultCallback<Object> initializationCallback) {
-        this.initializationCallback = initializationCallback;
-    }
-
-    public IResultCallback<Object> getDeinitializationCallback() {
-        return deinitializationCallback;
-    }
-
-    public void setDeinitializationCallback(IResultCallback<Object> deinitializationCallback) {
-        this.deinitializationCallback = deinitializationCallback;
-    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/dataset/DatasetDirectoryService.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/dataset/DatasetDirectoryService.java
index 13d0c30..e648733 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/dataset/DatasetDirectoryService.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/dataset/DatasetDirectoryService.java
@@ -14,17 +14,20 @@
  */
 package edu.uci.ics.hyracks.control.cc.dataset;
 
-import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.Map;
 
 import edu.uci.ics.hyracks.api.comm.NetworkAddress;
 import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord;
-import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord.Status;
+import edu.uci.ics.hyracks.api.dataset.DatasetJobRecord;
+import edu.uci.ics.hyracks.api.dataset.DatasetJobRecord.Status;
 import edu.uci.ics.hyracks.api.dataset.IDatasetDirectoryService;
 import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.dataset.ResultSetMetaData;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.job.IActivityClusterGraphGeneratorFactory;
 import edu.uci.ics.hyracks.api.job.JobId;
 
 /**
@@ -35,25 +38,46 @@
  * job.
  */
 public class DatasetDirectoryService implements IDatasetDirectoryService {
-    private final Map<JobId, Map<ResultSetId, ResultSetMetaData>> jobResultLocationsMap;
+    private final Map<JobId, DatasetJobRecord> jobResultLocations;
 
-    public DatasetDirectoryService() {
-        jobResultLocationsMap = new HashMap<JobId, Map<ResultSetId, ResultSetMetaData>>();
+    public DatasetDirectoryService(final int jobHistorySize) {
+        jobResultLocations = new LinkedHashMap<JobId, DatasetJobRecord>() {
+            private static final long serialVersionUID = 1L;
+
+            protected boolean removeEldestEntry(Map.Entry<JobId, DatasetJobRecord> eldest) {
+                return size() > jobHistorySize;
+            }
+        };
+    }
+
+    @Override
+    public synchronized void notifyJobCreation(JobId jobId, IActivityClusterGraphGeneratorFactory acggf) throws HyracksException {
+        DatasetJobRecord djr = jobResultLocations.get(jobId);
+        if (djr == null) {
+            djr = new DatasetJobRecord();
+            jobResultLocations.put(jobId, djr);
+        }
+    }
+
+    @Override
+    public void notifyJobStart(JobId jobId) throws HyracksException {
+        // Auto-generated method stub
+    }
+
+    @Override
+    public void notifyJobFinish(JobId jobId) throws HyracksException {
+        // Auto-generated method stub
     }
 
     @Override
     public synchronized void registerResultPartitionLocation(JobId jobId, ResultSetId rsId, boolean orderedResult,
             int partition, int nPartitions, NetworkAddress networkAddress) {
-        Map<ResultSetId, ResultSetMetaData> rsMap = jobResultLocationsMap.get(jobId);
-        if (rsMap == null) {
-            rsMap = new HashMap<ResultSetId, ResultSetMetaData>();
-            jobResultLocationsMap.put(jobId, rsMap);
-        }
+        DatasetJobRecord djr = jobResultLocations.get(jobId);
 
-        ResultSetMetaData resultSetMetaData = rsMap.get(rsId);
+        ResultSetMetaData resultSetMetaData = djr.get(rsId);
         if (resultSetMetaData == null) {
             resultSetMetaData = new ResultSetMetaData(orderedResult, new DatasetDirectoryRecord[nPartitions]);
-            rsMap.put(rsId, resultSetMetaData);
+            djr.put(rsId, resultSetMetaData);
         }
 
         DatasetDirectoryRecord[] records = resultSetMetaData.getRecords();
@@ -67,20 +91,42 @@
 
     @Override
     public synchronized void reportResultPartitionWriteCompletion(JobId jobId, ResultSetId rsId, int partition) {
-        DatasetDirectoryRecord ddr = getDatasetDirectoryRecord(jobId, rsId, partition);
-        ddr.writeEOS();
+        int successCount = 0;
+
+        DatasetJobRecord djr = jobResultLocations.get(jobId);
+        ResultSetMetaData resultSetMetaData = djr.get(rsId);
+        DatasetDirectoryRecord[] records = resultSetMetaData.getRecords();
+        records[partition].writeEOS();
+
+        for (DatasetDirectoryRecord record : records) {
+            if (record.getStatus() == DatasetDirectoryRecord.Status.SUCCESS) {
+                successCount++;
+            }
+        }
+        if (successCount == records.length) {
+            djr.success();
+        }
+        notifyAll();
     }
 
     @Override
     public synchronized void reportResultPartitionFailure(JobId jobId, ResultSetId rsId, int partition) {
-        DatasetDirectoryRecord ddr = getDatasetDirectoryRecord(jobId, rsId, partition);
-        ddr.fail();
+        DatasetJobRecord djr = jobResultLocations.get(jobId);
+        djr.fail();
+        notifyAll();
+    }
+
+    @Override
+    public synchronized void reportJobFailure(JobId jobId) {
+        DatasetJobRecord djr = jobResultLocations.get(jobId);
+        djr.fail();
+        notifyAll();
     }
 
     @Override
     public synchronized Status getResultStatus(JobId jobId, ResultSetId rsId) throws HyracksDataException {
-        Map<ResultSetId, ResultSetMetaData> rsMap;
-        while ((rsMap = jobResultLocationsMap.get(jobId)) == null) {
+        DatasetJobRecord djr;
+        while ((djr = jobResultLocations.get(jobId)) == null) {
             try {
                 wait();
             } catch (InterruptedException e) {
@@ -88,38 +134,7 @@
             }
         }
 
-        ResultSetMetaData resultSetMetaData = rsMap.get(rsId);
-        if (resultSetMetaData == null || resultSetMetaData.getRecords() == null) {
-            throw new HyracksDataException("ResultSet locations uninitialized when it is expected to be initialized.");
-        }
-        DatasetDirectoryRecord[] records = resultSetMetaData.getRecords();
-
-        ArrayList<Status> statuses = new ArrayList<Status>(records.length);
-        for (int i = 0; i < records.length; i++) {
-            statuses.add(records[i].getStatus());
-        }
-
-        // Default status is idle
-        Status status = Status.IDLE;
-        if (statuses.contains(Status.FAILED)) {
-            // Even if there is at least one failed entry we should return failed status.
-            return Status.FAILED;
-        } else if (statuses.contains(Status.RUNNING)) {
-            // If there are not failed entry and if there is at least one running entry we should return running status.
-            return Status.RUNNING;
-        } else {
-            // If each and every partition has reported success do we report success as the status.
-            int successCount = 0;
-            for (int i = 0; i < statuses.size(); i++) {
-                if (statuses.get(i) == Status.SUCCESS) {
-                    successCount++;
-                }
-            }
-            if (successCount == statuses.size()) {
-                return Status.SUCCESS;
-            }
-        }
-        return status;
+        return djr.getStatus();
     }
 
     @Override
@@ -136,13 +151,6 @@
         return newRecords;
     }
 
-    public DatasetDirectoryRecord getDatasetDirectoryRecord(JobId jobId, ResultSetId rsId, int partition) {
-        Map<ResultSetId, ResultSetMetaData> rsMap = jobResultLocationsMap.get(jobId);
-        ResultSetMetaData resultSetMetaData = rsMap.get(rsId);
-        DatasetDirectoryRecord[] records = resultSetMetaData.getRecords();
-        return records[partition];
-    }
-
     /**
      * Compares the records already known by the client for the given job's result set id with the records that the
      * dataset directory service knows and if there are any newly discovered records returns a whole array with the
@@ -177,14 +185,19 @@
      */
     private DatasetDirectoryRecord[] updatedRecords(JobId jobId, ResultSetId rsId, DatasetDirectoryRecord[] knownRecords)
             throws HyracksDataException {
-        Map<ResultSetId, ResultSetMetaData> rsMap = jobResultLocationsMap.get(jobId);
-        if (rsMap == null) {
-            return null;
+        DatasetJobRecord djr = jobResultLocations.get(jobId);
+
+        if (djr == null) {
+            throw new HyracksDataException("Requested JobId " + jobId + " doesn't exist");
         }
 
-        ResultSetMetaData resultSetMetaData = rsMap.get(rsId);
+        if (djr.getStatus() == Status.FAILED) {
+            throw new HyracksDataException("Job failed.");
+        }
+
+        ResultSetMetaData resultSetMetaData = djr.get(rsId);
         if (resultSetMetaData == null || resultSetMetaData.getRecords() == null) {
-            throw new HyracksDataException("ResultSet locations uninitialized when it is expected to be initialized.");
+            return null;
         }
 
         boolean ordered = resultSetMetaData.getOrderedResult();
@@ -219,23 +232,4 @@
         }
         return null;
     }
-
-    private class ResultSetMetaData {
-        private final boolean ordered;
-
-        private final DatasetDirectoryRecord[] records;
-
-        public ResultSetMetaData(boolean ordered, DatasetDirectoryRecord[] records) {
-            this.ordered = ordered;
-            this.records = records;
-        }
-
-        public boolean getOrderedResult() {
-            return ordered;
-        }
-
-        public DatasetDirectoryRecord[] getRecords() {
-            return records;
-        }
-    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/job/JobRun.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/job/JobRun.java
index 6f26de2..827a71e 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/job/JobRun.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/job/JobRun.java
@@ -29,6 +29,7 @@
 import edu.uci.ics.hyracks.api.dataflow.ConnectorDescriptorId;
 import edu.uci.ics.hyracks.api.dataflow.TaskId;
 import edu.uci.ics.hyracks.api.dataflow.connectors.IConnectorPolicy;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.api.job.ActivityCluster;
 import edu.uci.ics.hyracks.api.job.ActivityClusterGraph;
@@ -45,9 +46,9 @@
 import edu.uci.ics.hyracks.control.common.job.profiling.om.JobProfile;
 
 public class JobRun implements IJobStatusConditionVariable {
-    private final JobId jobId;
+    private final DeploymentId deploymentId;
 
-    private final String applicationName;
+    private final JobId jobId;
 
     private final IActivityClusterGraphGenerator acgg;
 
@@ -83,10 +84,10 @@
 
     private Exception pendingException;
 
-    public JobRun(ClusterControllerService ccs, JobId jobId, String applicationName,
+    public JobRun(ClusterControllerService ccs, DeploymentId deploymentId, JobId jobId,
             IActivityClusterGraphGenerator acgg, EnumSet<JobFlag> jobFlags) {
+        this.deploymentId = deploymentId;
         this.jobId = jobId;
-        this.applicationName = applicationName;
         this.acgg = acgg;
         this.acg = acgg.initialize();
         this.scheduler = new JobScheduler(ccs, this, acgg.getConstraints());
@@ -99,12 +100,12 @@
         connectorPolicyMap = new HashMap<ConnectorDescriptorId, IConnectorPolicy>();
     }
 
-    public JobId getJobId() {
-        return jobId;
+    public DeploymentId getDeploymentId() {
+        return deploymentId;
     }
 
-    public String getApplicationName() {
-        return applicationName;
+    public JobId getJobId() {
+        return jobId;
     }
 
     public ActivityClusterGraph getActivityClusterGraph() {
@@ -208,7 +209,6 @@
         JSONObject result = new JSONObject();
 
         result.put("job-id", jobId.toString());
-        result.put("application-name", applicationName);
         result.put("status", getStatus());
         result.put("create-time", getCreateTime());
         result.put("start-time", getCreateTime());
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/scheduler/JobScheduler.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/scheduler/JobScheduler.java
index b163db5..f3d7d34 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/scheduler/JobScheduler.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/scheduler/JobScheduler.java
@@ -34,6 +34,7 @@
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
 import edu.uci.ics.hyracks.api.dataflow.TaskId;
 import edu.uci.ics.hyracks.api.dataflow.connectors.IConnectorPolicy;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.api.job.ActivityCluster;
 import edu.uci.ics.hyracks.api.job.ActivityClusterGraph;
@@ -427,9 +428,9 @@
     }
 
     private void startTasks(Map<String, List<TaskAttemptDescriptor>> taskAttemptMap) throws HyracksException {
+        final DeploymentId deploymentId = jobRun.getDeploymentId();
         final JobId jobId = jobRun.getJobId();
         final ActivityClusterGraph acg = jobRun.getActivityClusterGraph();
-        final String appName = jobRun.getApplicationName();
         final Map<ConnectorDescriptorId, IConnectorPolicy> connectorPolicies = new HashMap<ConnectorDescriptorId, IConnectorPolicy>(
                 jobRun.getConnectorPolicyMap());
         for (Map.Entry<String, List<TaskAttemptDescriptor>> entry : taskAttemptMap.entrySet()) {
@@ -444,8 +445,8 @@
                 }
                 try {
                     byte[] jagBytes = changed ? JavaSerializationUtils.serialize(acg) : null;
-                    node.getNodeController().startTasks(appName, jobId, jagBytes, taskDescriptors, connectorPolicies,
-                            jobRun.getFlags());
+                    node.getNodeController().startTasks(deploymentId, jobId, jagBytes, taskDescriptors,
+                            connectorPolicies, jobRun.getFlags());
                 } catch (Exception e) {
                     e.printStackTrace();
                 }
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/web/ApplicationInstallationHandler.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/web/ApplicationInstallationHandler.java
old mode 100644
new mode 100755
index 73f3a1a..0236c4b
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/web/ApplicationInstallationHandler.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/web/ApplicationInstallationHandler.java
@@ -14,6 +14,9 @@
  */
 package edu.uci.ics.hyracks.control.cc.web;
 
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -22,13 +25,13 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.IOUtils;
 import org.eclipse.jetty.http.HttpMethods;
 import org.eclipse.jetty.server.Request;
 import org.eclipse.jetty.server.handler.AbstractHandler;
 
 import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
-import edu.uci.ics.hyracks.control.common.application.ApplicationContext;
 import edu.uci.ics.hyracks.control.common.work.SynchronizableWork;
 
 public class ApplicationInstallationHandler extends AbstractHandler {
@@ -52,18 +55,21 @@
             if (parts.length != 1) {
                 return;
             }
-            final String appName = parts[0];
+            final String[] params = parts[0].split("&");
+            String deployIdString = params[0];
+            String rootDir = ccs.getServerContext().getBaseDir().toString();
+            final String deploymentDir = rootDir.endsWith(File.separator) ? rootDir + "applications/" + deployIdString
+                    : rootDir + File.separator + "/applications/" + File.separator + deployIdString;
             if (HttpMethods.PUT.equals(request.getMethod())) {
                 class OutputStreamGetter extends SynchronizableWork {
                     private OutputStream os;
 
                     @Override
                     protected void doRun() throws Exception {
-                        ApplicationContext appCtx;
-                        appCtx = ccs.getApplicationMap().get(appName);
-                        if (appCtx != null) {
-                            os = appCtx.getHarOutputStream();
-                        }
+                        FileUtils.forceMkdir(new File(deploymentDir));
+                        String fileName = params[1];
+                        File jarFile = new File(deploymentDir, fileName);
+                        os = new FileOutputStream(jarFile);
                     }
                 }
                 OutputStreamGetter r = new OutputStreamGetter();
@@ -83,11 +89,9 @@
 
                     @Override
                     protected void doRun() throws Exception {
-                        ApplicationContext appCtx;
-                        appCtx = ccs.getApplicationMap().get(appName);
-                        if (appCtx != null && appCtx.containsHar()) {
-                            is = appCtx.getHarInputStream();
-                        }
+                        String fileName = params[1];
+                        File jarFile = new File(deploymentDir, fileName);
+                        is = new FileInputStream(jarFile);
                     }
                 }
                 InputStreamGetter r = new InputStreamGetter();
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationCreateWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationCreateWork.java
deleted file mode 100644
index 15d6d1f..0000000
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationCreateWork.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.control.cc.work;
-
-import java.io.IOException;
-import java.util.Map;
-
-import edu.uci.ics.hyracks.api.exceptions.HyracksException;
-import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
-import edu.uci.ics.hyracks.control.cc.application.CCApplicationContext;
-import edu.uci.ics.hyracks.control.common.application.ApplicationStatus;
-import edu.uci.ics.hyracks.control.common.work.AbstractWork;
-import edu.uci.ics.hyracks.control.common.work.IResultCallback;
-
-public class ApplicationCreateWork extends AbstractWork {
-    private final ClusterControllerService ccs;
-    private final String appName;
-    private IResultCallback<Object> callback;
-
-    public ApplicationCreateWork(ClusterControllerService ccs, String appName, IResultCallback<Object> callback) {
-        this.ccs = ccs;
-        this.appName = appName;
-        this.callback = callback;
-    }
-
-    @Override
-    public void run() {
-        try {
-            Map<String, CCApplicationContext> applications = ccs.getApplicationMap();
-            if (applications.containsKey(appName)) {
-                callback.setException(new HyracksException("Duplicate application with name: " + appName
-                        + " being created."));
-                return;
-            }
-            CCApplicationContext appCtx;
-            try {
-                appCtx = new CCApplicationContext(ccs.getServerContext(), ccs.getCCContext(), appName);
-            } catch (IOException e) {
-                callback.setException(e);
-                return;
-            }
-            appCtx.setStatus(ApplicationStatus.CREATED);
-            applications.put(appName, appCtx);
-            callback.setValue(null);
-        } catch (Exception e) {
-            callback.setException(e);
-        }
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationDestroyWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationDestroyWork.java
deleted file mode 100644
index fc86c4c..0000000
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationDestroyWork.java
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.control.cc.work;
-
-import java.util.Map;
-
-import edu.uci.ics.hyracks.api.exceptions.HyracksException;
-import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
-import edu.uci.ics.hyracks.control.cc.NodeControllerState;
-import edu.uci.ics.hyracks.control.cc.application.CCApplicationContext;
-import edu.uci.ics.hyracks.control.common.application.ApplicationStatus;
-import edu.uci.ics.hyracks.control.common.base.INodeController;
-import edu.uci.ics.hyracks.control.common.work.AbstractWork;
-import edu.uci.ics.hyracks.control.common.work.IResultCallback;
-
-public class ApplicationDestroyWork extends AbstractWork {
-    private final ClusterControllerService ccs;
-    private final String appName;
-    private IResultCallback<Object> callback;
-
-    public ApplicationDestroyWork(ClusterControllerService ccs, String appName, IResultCallback<Object> callback) {
-        this.ccs = ccs;
-        this.appName = appName;
-        this.callback = callback;
-    }
-
-    @Override
-    public void run() {
-        try {
-            final CCApplicationContext appCtx = ccs.getApplicationMap().get(appName);
-            if (appCtx == null) {
-                callback.setException(new HyracksException("No application with name: " + appName));
-                return;
-            }
-            if (appCtx.getStatus() == ApplicationStatus.IN_DEINITIALIZATION
-                    || appCtx.getStatus() == ApplicationStatus.DEINITIALIZED) {
-                return;
-            }
-            Map<String, NodeControllerState> nodeMap = ccs.getNodeMap();
-            appCtx.getDeinitializationPendingNodeIds().addAll(nodeMap.keySet());
-            appCtx.setStatus(ApplicationStatus.IN_DEINITIALIZATION);
-            appCtx.setDeinitializationCallback(callback);
-            for (String nodeId : ccs.getNodeMap().keySet()) {
-                NodeControllerState nodeState = nodeMap.get(nodeId);
-                final INodeController node = nodeState.getNodeController();
-                node.destroyApplication(appName);
-            }
-        } catch (Exception e) {
-            callback.setException(e);
-        }
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationMessageWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationMessageWork.java
index 22ff84d..50b3e30 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationMessageWork.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationMessageWork.java
@@ -14,49 +14,48 @@
  */
 package edu.uci.ics.hyracks.control.cc.work;
 
-import java.io.IOException;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import edu.uci.ics.hyracks.api.application.ICCApplicationContext;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.messages.IMessage;
 import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
-import edu.uci.ics.hyracks.control.common.application.ApplicationContext;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentUtils;
 import edu.uci.ics.hyracks.control.common.work.AbstractWork;
 
 /**
  * @author rico
- * 
  */
 public class ApplicationMessageWork extends AbstractWork {
 
     private static final Logger LOGGER = Logger.getLogger(ApplicationMessageWork.class.getName());
     private byte[] message;
+    private DeploymentId deploymentId;
     private String nodeId;
     private ClusterControllerService ccs;
-    private String appName;
 
-    public ApplicationMessageWork(ClusterControllerService ccs, byte[] message, String appName, String nodeId) {
+    public ApplicationMessageWork(ClusterControllerService ccs, byte[] message, DeploymentId deploymentId, String nodeId) {
         this.ccs = ccs;
+        this.deploymentId = deploymentId;
         this.nodeId = nodeId;
         this.message = message;
-        this.appName = appName;
     }
 
     @Override
     public void run() {
-
-        final ApplicationContext ctx = ccs.getApplicationMap().get(appName);
+        final ICCApplicationContext ctx = ccs.getApplicationContext();
         try {
-            final IMessage data = (IMessage) ctx.deserialize(message);
-            (new Thread() {
+            final IMessage data = (IMessage) DeploymentUtils.deserialize(message, deploymentId, ctx);
+            ccs.getExecutor().execute(new Runnable() {
+                @Override
                 public void run() {
                     ctx.getMessageBroker().receivedMessage(data, nodeId);
                 }
-            }).start();
-        } catch (IOException e) {
+            });
+        } catch (Exception e) {
             LOGGER.log(Level.WARNING, "Error in stats reporting", e);
-        } catch (ClassNotFoundException e) {
-            Logger.getLogger(this.getClass().getName()).log(Level.WARNING, "Error in stats reporting", e);
+            throw new RuntimeException(e);
         }
     }
 
@@ -64,5 +63,4 @@
     public String toString() {
         return "nodeID: " + nodeId;
     }
-
-}
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationStartWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationStartWork.java
deleted file mode 100644
index e4ad56c..0000000
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationStartWork.java
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.control.cc.work;
-
-import java.util.HashMap;
-import java.util.Map;
-
-import edu.uci.ics.hyracks.api.exceptions.HyracksException;
-import edu.uci.ics.hyracks.api.util.JavaSerializationUtils;
-import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
-import edu.uci.ics.hyracks.control.cc.NodeControllerState;
-import edu.uci.ics.hyracks.control.cc.application.CCApplicationContext;
-import edu.uci.ics.hyracks.control.common.application.ApplicationStatus;
-import edu.uci.ics.hyracks.control.common.base.INodeController;
-import edu.uci.ics.hyracks.control.common.work.AbstractWork;
-import edu.uci.ics.hyracks.control.common.work.IResultCallback;
-
-public class ApplicationStartWork extends AbstractWork {
-    private final ClusterControllerService ccs;
-    private final String appName;
-    private final IResultCallback<Object> callback;
-
-    public ApplicationStartWork(ClusterControllerService ccs, String appName, IResultCallback<Object> callback) {
-        this.ccs = ccs;
-        this.appName = appName;
-        this.callback = callback;
-    }
-
-    @Override
-    public void run() {
-        try {
-            final CCApplicationContext appCtx = ccs.getApplicationMap().get(appName);
-            if (appCtx == null) {
-                callback.setException(new HyracksException("No application with name: " + appName));
-                return;
-            }
-            if (appCtx.getStatus() != ApplicationStatus.CREATED) {
-                callback.setException(new HyracksException("Application in incorrect state for starting: "
-                        + appCtx.getStatus()));
-            }
-            final Map<String, NodeControllerState> nodeMapCopy = new HashMap<String, NodeControllerState>(
-                    ccs.getNodeMap());
-            appCtx.getInitializationPendingNodeIds().addAll(nodeMapCopy.keySet());
-            appCtx.setStatus(ApplicationStatus.IN_INITIALIZATION);
-            appCtx.setInitializationCallback(callback);
-            ccs.getExecutor().execute(new Runnable() {
-                @Override
-                public void run() {
-                    try {
-                        appCtx.initializeClassPath();
-                        appCtx.initialize();
-                        final byte[] distributedState = JavaSerializationUtils.serialize(appCtx.getDistributedState());
-                        final boolean deployHar = appCtx.containsHar();
-                        for (final String nodeId : nodeMapCopy.keySet()) {
-                            NodeControllerState nodeState = nodeMapCopy.get(nodeId);
-                            final INodeController node = nodeState.getNodeController();
-                            node.createApplication(appName, deployHar, distributedState);
-                        }
-                    } catch (Exception e) {
-                        callback.setException(e);
-                    }
-                }
-            });
-        } catch (Exception e) {
-            callback.setException(e);
-        }
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationStateChangeWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationStateChangeWork.java
deleted file mode 100644
index f6271fe..0000000
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ApplicationStateChangeWork.java
+++ /dev/null
@@ -1,85 +0,0 @@
-package edu.uci.ics.hyracks.control.cc.work;
-
-import java.util.Set;
-import java.util.logging.Logger;
-
-import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
-import edu.uci.ics.hyracks.control.cc.application.CCApplicationContext;
-import edu.uci.ics.hyracks.control.common.application.ApplicationStatus;
-import edu.uci.ics.hyracks.control.common.ipc.CCNCFunctions;
-import edu.uci.ics.hyracks.control.common.work.AbstractWork;
-import edu.uci.ics.hyracks.control.common.work.IResultCallback;
-
-public class ApplicationStateChangeWork extends AbstractWork {
-    private static final Logger LOGGER = Logger.getLogger(ApplicationStateChangeWork.class.getName());
-
-    private final ClusterControllerService ccs;
-    private final CCNCFunctions.ApplicationStateChangeResponseFunction ascrf;
-
-    public ApplicationStateChangeWork(ClusterControllerService ccs,
-            CCNCFunctions.ApplicationStateChangeResponseFunction ascrf) {
-        this.ccs = ccs;
-        this.ascrf = ascrf;
-    }
-
-    @Override
-    public void run() {
-        final CCApplicationContext appCtx = ccs.getApplicationMap().get(ascrf.getApplicationName());
-        if (appCtx == null) {
-            LOGGER.warning("Got ApplicationStateChangeResponse for application " + ascrf.getApplicationName()
-                    + " that does not exist");
-            return;
-        }
-        switch (ascrf.getStatus()) {
-            case INITIALIZED: {
-                Set<String> pendingNodeIds = appCtx.getInitializationPendingNodeIds();
-                boolean changed = pendingNodeIds.remove(ascrf.getNodeId());
-                if (!changed) {
-                    LOGGER.warning("Got ApplicationStateChangeResponse for application " + ascrf.getApplicationName()
-                            + " from unexpected node " + ascrf.getNodeId() + " to state " + ascrf.getStatus());
-                    return;
-                }
-                if (pendingNodeIds.isEmpty()) {
-                    appCtx.setStatus(ApplicationStatus.INITIALIZED);
-                    IResultCallback<Object> callback = appCtx.getInitializationCallback();
-                    appCtx.setInitializationCallback(null);
-                    callback.setValue(null);
-                }
-                return;
-            }
-
-            case DEINITIALIZED: {
-                Set<String> pendingNodeIds = appCtx.getDeinitializationPendingNodeIds();
-                boolean changed = pendingNodeIds.remove(ascrf.getNodeId());
-                if (!changed) {
-                    LOGGER.warning("Got ApplicationStateChangeResponse for application " + ascrf.getApplicationName()
-                            + " from unexpected node " + ascrf.getNodeId() + " to state " + ascrf.getStatus());
-                    return;
-                }
-                if (pendingNodeIds.isEmpty()) {
-                    appCtx.setStatus(ApplicationStatus.DEINITIALIZED);
-                    ccs.getExecutor().execute(new Runnable() {
-                        @Override
-                        public void run() {
-                            try {
-                                appCtx.deinitialize();
-                            } catch (Exception e) {
-                                e.printStackTrace();
-                            }
-                            ccs.getWorkQueue().schedule(new AbstractWork() {
-                                @Override
-                                public void run() {
-                                    ccs.getApplicationMap().remove(ascrf.getApplicationName());
-                                    IResultCallback<Object> callback = appCtx.getDeinitializationCallback();
-                                    appCtx.setDeinitializationCallback(null);
-                                    callback.setValue(null);
-                                }
-                            });
-                        }
-                    });
-                }
-                return;
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/CliDeployBinaryWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/CliDeployBinaryWork.java
new file mode 100644
index 0000000..fa44633
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/CliDeployBinaryWork.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.control.cc.work;
+
+import java.net.URL;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeSet;
+import java.util.UUID;
+
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
+import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
+import edu.uci.ics.hyracks.control.cc.NodeControllerState;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentRun;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentUtils;
+import edu.uci.ics.hyracks.control.common.work.IPCResponder;
+import edu.uci.ics.hyracks.control.common.work.SynchronizableWork;
+
+public class CliDeployBinaryWork extends SynchronizableWork {
+
+    private ClusterControllerService ccs;
+    private List<URL> binaryURLs;
+    private DeploymentId deploymentId;
+    private IPCResponder<DeploymentId> callback;
+
+    public CliDeployBinaryWork(ClusterControllerService ncs, List<URL> binaryURLs, DeploymentId deploymentId,
+            IPCResponder<DeploymentId> callback) {
+        this.ccs = ncs;
+        this.binaryURLs = binaryURLs;
+        this.deploymentId = deploymentId;
+        this.callback = callback;
+    }
+
+    @Override
+    public void doRun() {
+        try {
+            if (deploymentId == null) {
+                deploymentId = new DeploymentId(UUID.randomUUID().toString());
+            }
+            /**
+             * Deploy for the cluster controller
+             */
+            DeploymentUtils.deploy(deploymentId, binaryURLs, ccs.getApplicationContext()
+                    .getJobSerializerDeserializerContainer(), ccs.getServerContext(), false);
+
+            /**
+             * Deploy for the node controllers
+             */
+            Map<String, NodeControllerState> nodeControllerStateMap = ccs.getNodeMap();
+
+            Set<String> nodeIds = new TreeSet<String>();
+            for (String nc : nodeControllerStateMap.keySet()) {
+                nodeIds.add(nc);
+            }
+            final DeploymentRun dRun = new DeploymentRun(nodeIds);
+            ccs.addDeploymentRun(deploymentId, dRun);
+
+            /***
+             * deploy binaries to each node controller
+             */
+            for (NodeControllerState ncs : nodeControllerStateMap.values()) {
+                ncs.getNodeController().deployBinary(deploymentId, binaryURLs);
+            }
+
+            ccs.getExecutor().execute(new Runnable() {
+                @Override
+                public void run() {
+                    try {
+                        /**
+                         * wait for completion
+                         */
+                        dRun.waitForCompletion();
+                        ccs.removeDeploymentRun(deploymentId);
+                        callback.setValue(deploymentId);
+                    } catch (Exception e) {
+                        callback.setException(e);
+                    }
+                }
+            });
+        } catch (Exception e) {
+            callback.setException(e);
+        }
+    }
+}
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/CliUnDeployBinaryWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/CliUnDeployBinaryWork.java
new file mode 100644
index 0000000..8e429c9
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/CliUnDeployBinaryWork.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.control.cc.work;
+
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeSet;
+import java.util.UUID;
+
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
+import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
+import edu.uci.ics.hyracks.control.cc.NodeControllerState;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentRun;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentUtils;
+import edu.uci.ics.hyracks.control.common.work.IPCResponder;
+import edu.uci.ics.hyracks.control.common.work.SynchronizableWork;
+
+public class CliUnDeployBinaryWork extends SynchronizableWork {
+
+    private ClusterControllerService ccs;
+    private DeploymentId deploymentId;
+    private IPCResponder<DeploymentId> callback;
+
+    public CliUnDeployBinaryWork(ClusterControllerService ncs, DeploymentId deploymentId,
+            IPCResponder<DeploymentId> callback) {
+        this.ccs = ncs;
+        this.deploymentId = deploymentId;
+        this.callback = callback;
+    }
+
+    @Override
+    public void doRun() {
+        try {
+            if (deploymentId == null) {
+                deploymentId = new DeploymentId(UUID.randomUUID().toString());
+            }
+            /**
+             * Deploy for the cluster controller
+             */
+            DeploymentUtils.undeploy(deploymentId, ccs.getApplicationContext().getJobSerializerDeserializerContainer(),
+                    ccs.getServerContext());
+
+            /**
+             * Deploy for the node controllers
+             */
+            Map<String, NodeControllerState> nodeControllerStateMap = ccs.getNodeMap();
+
+            Set<String> nodeIds = new TreeSet<String>();
+            for (String nc : nodeControllerStateMap.keySet()) {
+                nodeIds.add(nc);
+            }
+            final DeploymentRun dRun = new DeploymentRun(nodeIds);
+            ccs.addDeploymentRun(deploymentId, dRun);
+
+            /***
+             * deploy binaries to each node controller
+             */
+            for (NodeControllerState ncs : nodeControllerStateMap.values()) {
+                ncs.getNodeController().undeployBinary(deploymentId);
+            }
+
+            ccs.getExecutor().execute(new Runnable() {
+                @Override
+                public void run() {
+                    try {
+                        /**
+                         * wait for completion
+                         */
+                        dRun.waitForCompletion();
+                        ccs.removeDeploymentRun(deploymentId);
+                        callback.setValue(null);
+                    } catch (Exception e) {
+                        callback.setException(e);
+                    }
+                }
+            });
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+}
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetJobSummariesJSONWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetJobSummariesJSONWork.java
index a0afd61..20035a4 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetJobSummariesJSONWork.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetJobSummariesJSONWork.java
@@ -44,7 +44,6 @@
             JSONObject jo = new JSONObject();
             jo.put("type", "job-summary");
             jo.put("job-id", run.getJobId().toString());
-            jo.put("application-name", run.getApplicationName());
             jo.put("create-time", run.getCreateTime());
             jo.put("start-time", run.getCreateTime());
             jo.put("end-time", run.getCreateTime());
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetResultStatusWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetResultStatusWork.java
index d2dadf5..1bd0674 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetResultStatusWork.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetResultStatusWork.java
@@ -14,7 +14,7 @@
  */
 package edu.uci.ics.hyracks.control.cc.work;
 
-import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord.Status;
+import edu.uci.ics.hyracks.api.dataset.DatasetJobRecord.Status;
 import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.job.JobId;
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobCleanupWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobCleanupWork.java
index 6b5ff03..b304b21 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobCleanupWork.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobCleanupWork.java
@@ -69,7 +69,7 @@
                 }
             }
         } else {
-            CCApplicationContext appCtx = ccs.getApplicationMap().get(run.getApplicationName());
+            CCApplicationContext appCtx = ccs.getApplicationContext();
             if (appCtx != null) {
                 try {
                     appCtx.notifyJobFinish(jobId);
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobStartWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobStartWork.java
index b062d33..7ecdd16 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobStartWork.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobStartWork.java
@@ -16,8 +16,7 @@
 
 import java.util.EnumSet;
 
-import edu.uci.ics.hyracks.api.dataset.IDatasetDirectoryService;
-import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.job.IActivityClusterGraphGenerator;
 import edu.uci.ics.hyracks.api.job.IActivityClusterGraphGeneratorFactory;
 import edu.uci.ics.hyracks.api.job.JobFlag;
@@ -26,6 +25,7 @@
 import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
 import edu.uci.ics.hyracks.control.cc.application.CCApplicationContext;
 import edu.uci.ics.hyracks.control.cc.job.JobRun;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentUtils;
 import edu.uci.ics.hyracks.control.common.work.IResultCallback;
 import edu.uci.ics.hyracks.control.common.work.SynchronizableWork;
 
@@ -33,31 +33,28 @@
     private final ClusterControllerService ccs;
     private final byte[] acggfBytes;
     private final EnumSet<JobFlag> jobFlags;
+    private final DeploymentId deploymentId;
     private final JobId jobId;
-    private final String appName;
     private final IResultCallback<JobId> callback;
 
-    public JobStartWork(ClusterControllerService ccs, String appName, byte[] acggfBytes, EnumSet<JobFlag> jobFlags,
-            JobId jobId, IResultCallback<JobId> callback) {
+    public JobStartWork(ClusterControllerService ccs, DeploymentId deploymentId, byte[] acggfBytes,
+            EnumSet<JobFlag> jobFlags, JobId jobId, IResultCallback<JobId> callback) {
+        this.deploymentId = deploymentId;
         this.jobId = jobId;
         this.ccs = ccs;
         this.acggfBytes = acggfBytes;
         this.jobFlags = jobFlags;
-        this.appName = appName;
         this.callback = callback;
     }
 
     @Override
     protected void doRun() throws Exception {
         try {
-            final CCApplicationContext appCtx = ccs.getApplicationMap().get(appName);
-            if (appCtx == null) {
-                throw new HyracksException("No application with id " + appName + " found");
-            }
-            IActivityClusterGraphGeneratorFactory acggf = appCtx.createActivityClusterGraphGeneratorFactory(acggfBytes);
-            IActivityClusterGraphGenerator acgg = acggf.createActivityClusterGraphGenerator(appName, jobId, appCtx,
-                    jobFlags);
-            JobRun run = new JobRun(ccs, jobId, appName, acgg, jobFlags);
+            final CCApplicationContext appCtx = ccs.getApplicationContext();
+            IActivityClusterGraphGeneratorFactory acggf = (IActivityClusterGraphGeneratorFactory) DeploymentUtils
+                    .deserialize(acggfBytes, deploymentId, appCtx);
+            IActivityClusterGraphGenerator acgg = acggf.createActivityClusterGraphGenerator(jobId, appCtx, jobFlags);
+            JobRun run = new JobRun(ccs, deploymentId, jobId, acgg, jobFlags);
             run.setStatus(JobStatus.INITIALIZED, null);
             ccs.getActiveRunMap().put(jobId, run);
             appCtx.notifyJobCreation(jobId, acggf);
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobletCleanupNotificationWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobletCleanupNotificationWork.java
index 9927289..ed58c43 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobletCleanupNotificationWork.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobletCleanupNotificationWork.java
@@ -59,7 +59,7 @@
             ncs.getActiveJobIds().remove(jobId);
         }
         if (cleanupPendingNodes.isEmpty()) {
-            CCApplicationContext appCtx = ccs.getApplicationMap().get(run.getApplicationName());
+            CCApplicationContext appCtx = ccs.getApplicationContext();
             if (appCtx != null) {
                 try {
                     appCtx.notifyJobFinish(jobId);
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/NotifyDeployBinaryWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/NotifyDeployBinaryWork.java
new file mode 100644
index 0000000..903cad3
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/NotifyDeployBinaryWork.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.control.cc.work;
+
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
+import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentRun;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentStatus;
+import edu.uci.ics.hyracks.control.common.work.AbstractWork;
+
+public class NotifyDeployBinaryWork extends AbstractWork {
+
+    private final ClusterControllerService ccs;
+    private final String nodeId;
+    private final DeploymentId deploymentId;
+    private DeploymentStatus deploymentStatus;
+
+    public NotifyDeployBinaryWork(ClusterControllerService ccs, DeploymentId deploymentId, String nodeId,
+            DeploymentStatus deploymentStatus) {
+        this.ccs = ccs;
+        this.nodeId = nodeId;
+        this.deploymentId = deploymentId;
+        this.deploymentStatus = deploymentStatus;
+
+    }
+
+    @Override
+    public void run() {
+        // notify that one NC is deployed
+        DeploymentRun dRun = ccs.getDeploymentRun(deploymentId);
+        dRun.notifyDeploymentStatus(nodeId, deploymentStatus);
+    }
+
+}
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/RegisterNodeWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/RegisterNodeWork.java
index e4e0aae..f7dd1d2 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/RegisterNodeWork.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/RegisterNodeWork.java
@@ -67,6 +67,7 @@
             LOGGER.log(Level.INFO, "Registered INodeController: id = " + id);
             NodeParameters params = new NodeParameters();
             params.setClusterControllerInfo(ccs.getClusterControllerInfo());
+            params.setDistributedState(ccs.getApplicationContext().getDistributedState());
             params.setHeartbeatPeriod(ccs.getCCConfig().heartbeatPeriod);
             params.setProfileDumpPeriod(ccs.getCCConfig().profileDumpPeriod);
             result = new CCNCFunctions.NodeRegistrationResult(params, null);
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/TaskFailureWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/TaskFailureWork.java
index 0fff257..b3550bf 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/TaskFailureWork.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/TaskFailureWork.java
@@ -32,6 +32,7 @@
     @Override
     protected void performEvent(TaskAttempt ta) {
         JobRun run = ccs.getActiveRunMap().get(jobId);
+        //ccs.getDatasetDirectoryService().reportJobFailure(jobId);
         ActivityCluster ac = ta.getTask().getTaskCluster().getActivityCluster();
         run.getScheduler().notifyTaskFailure(ta, ac, details);
     }
diff --git a/hyracks/hyracks-control/hyracks-control-common/pom.xml b/hyracks/hyracks-control/hyracks-control-common/pom.xml
index 75fe3c9..4ffb716 100644
--- a/hyracks/hyracks-control/hyracks-control-common/pom.xml
+++ b/hyracks/hyracks-control/hyracks-control-common/pom.xml
@@ -1,14 +1,12 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-control-common</artifactId>
   <name>hyracks-control-common</name>
-  <version>0.2.4-SNAPSHOT</version>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-control</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -29,7 +27,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/application/ApplicationContext.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/application/ApplicationContext.java
index fc755a5..58ae79e 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/application/ApplicationContext.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/application/ApplicationContext.java
@@ -14,180 +14,23 @@
  */
 package edu.uci.ics.hyracks.control.common.application;
 
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
 import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
 import java.io.Serializable;
-import java.net.MalformedURLException;
-import java.net.URL;
-import java.net.URLClassLoader;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.Comparator;
-import java.util.Enumeration;
-import java.util.List;
-import java.util.Properties;
-import java.util.zip.ZipEntry;
-import java.util.zip.ZipFile;
-
-import org.apache.commons.io.FileUtils;
-import org.apache.commons.io.IOUtils;
 
 import edu.uci.ics.hyracks.api.application.IApplicationContext;
-import edu.uci.ics.hyracks.api.application.IBootstrap;
+import edu.uci.ics.hyracks.api.job.IJobSerializerDeserializerContainer;
+import edu.uci.ics.hyracks.api.job.JobSerializerDeserializerContainer;
 import edu.uci.ics.hyracks.api.messages.IMessageBroker;
-import edu.uci.ics.hyracks.api.util.JavaSerializationUtils;
 import edu.uci.ics.hyracks.control.common.context.ServerContext;
 
 public abstract class ApplicationContext implements IApplicationContext {
-    private static final String APPLICATION_ROOT = "applications";
-    private static final String CLUSTER_CONTROLLER_BOOTSTRAP_CLASS_KEY = "cc.bootstrap.class";
-    private static final String NODE_CONTROLLER_BOOTSTRAP_CLASS_KEY = "nc.bootstrap.class";
-
     protected ServerContext serverCtx;
-    protected final String appName;
-    protected final File applicationRootDir;
-    protected ClassLoader classLoader;
-    protected ApplicationStatus status;
-    protected Properties deploymentDescriptor;
-    protected IBootstrap bootstrap;
     protected Serializable distributedState;
     protected IMessageBroker messageBroker;
+    protected IJobSerializerDeserializerContainer jobSerDeContainer = new JobSerializerDeserializerContainer();
 
-    public ApplicationContext(ServerContext serverCtx, String appName) throws IOException {
+    public ApplicationContext(ServerContext serverCtx) throws IOException {
         this.serverCtx = serverCtx;
-        this.appName = appName;
-        this.applicationRootDir = new File(new File(serverCtx.getBaseDir(), APPLICATION_ROOT), appName);
-        FileUtils.deleteDirectory(applicationRootDir);
-        applicationRootDir.mkdirs();
-    }
-
-    public String getApplicationName() {
-        return appName;
-    }
-
-    public void initializeClassPath() throws Exception {
-        if (expandArchive()) {
-            File expandedFolder = getExpandedFolder();
-            List<URL> urls = new ArrayList<URL>();
-            findJarFiles(expandedFolder, urls);
-            Collections.sort(urls, new Comparator<URL>() {
-                @Override
-                public int compare(URL o1, URL o2) {
-                    return o1.getFile().compareTo(o2.getFile());
-                }
-            });
-            classLoader = new URLClassLoader(urls.toArray(new URL[urls.size()]));
-        } else {
-            classLoader = getClass().getClassLoader();
-        }
-        deploymentDescriptor = parseDeploymentDescriptor();
-    }
-
-    public void initialize() throws Exception {
-        if (deploymentDescriptor != null) {
-            String bootstrapClass = null;
-            switch (serverCtx.getServerType()) {
-                case CLUSTER_CONTROLLER: {
-                    bootstrapClass = deploymentDescriptor.getProperty(CLUSTER_CONTROLLER_BOOTSTRAP_CLASS_KEY);
-                    break;
-                }
-                case NODE_CONTROLLER: {
-                    bootstrapClass = deploymentDescriptor.getProperty(NODE_CONTROLLER_BOOTSTRAP_CLASS_KEY);
-                    break;
-                }
-            }
-            if (bootstrapClass != null) {
-                bootstrap = (IBootstrap) classLoader.loadClass(bootstrapClass).newInstance();
-                start();
-            }
-        }
-    }
-
-    protected abstract void start() throws Exception;
-
-    protected abstract void stop() throws Exception;
-
-    private void findJarFiles(File dir, List<URL> urls) throws MalformedURLException {
-        for (File f : dir.listFiles()) {
-            if (f.isDirectory()) {
-                findJarFiles(f, urls);
-            } else if (f.getName().endsWith(".jar") || f.getName().endsWith(".zip")) {
-                urls.add(f.toURI().toURL());
-            }
-        }
-    }
-
-    private Properties parseDeploymentDescriptor() throws IOException {
-        InputStream in = classLoader.getResourceAsStream("hyracks-deployment.properties");
-        Properties props = new Properties();
-        if (in != null) {
-            try {
-                props.load(in);
-            } finally {
-                in.close();
-            }
-        }
-        return props;
-    }
-
-    private boolean expandArchive() throws IOException {
-        File archiveFile = getArchiveFile();
-        if (archiveFile.exists()) {
-            File expandedFolder = getExpandedFolder();
-            FileUtils.deleteDirectory(expandedFolder);
-            ZipFile zf = new ZipFile(archiveFile);
-            for (Enumeration<? extends ZipEntry> i = zf.entries(); i.hasMoreElements();) {
-                ZipEntry ze = i.nextElement();
-                String name = ze.getName();
-                if (name.endsWith("/")) {
-                    continue;
-                }
-                InputStream is = zf.getInputStream(ze);
-                OutputStream os = FileUtils.openOutputStream(new File(expandedFolder, name));
-                try {
-                    IOUtils.copyLarge(is, os);
-                } finally {
-                    os.close();
-                    is.close();
-                }
-            }
-            return true;
-        }
-        return false;
-    }
-
-    private File getExpandedFolder() {
-        return new File(applicationRootDir, "expanded");
-    }
-
-    public void deinitialize() throws Exception {
-        stop();
-        File expandedFolder = getExpandedFolder();
-        FileUtils.deleteDirectory(expandedFolder);
-    }
-
-    public Object deserialize(byte[] bytes) throws IOException, ClassNotFoundException {
-        return JavaSerializationUtils.deserialize(bytes, classLoader);
-    }
-
-    public OutputStream getHarOutputStream() throws IOException {
-        return new FileOutputStream(getArchiveFile());
-    }
-
-    private File getArchiveFile() {
-        return new File(applicationRootDir, "application.har");
-    }
-
-    public InputStream getHarInputStream() throws IOException {
-        return new FileInputStream(getArchiveFile());
-    }
-
-    public boolean containsHar() {
-        return getArchiveFile().exists();
     }
 
     @Override
@@ -196,19 +39,6 @@
     }
 
     @Override
-    public ClassLoader getClassLoader() {
-        return classLoader;
-    }
-
-    public void setStatus(ApplicationStatus status) {
-        this.status = status;
-    }
-
-    public ApplicationStatus getStatus() {
-        return status;
-    }
-
-    @Override
     public void setMessageBroker(IMessageBroker messageBroker) {
         this.messageBroker = messageBroker;
     }
@@ -217,4 +47,9 @@
     public IMessageBroker getMessageBroker() {
         return this.messageBroker;
     }
+
+    @Override
+    public IJobSerializerDeserializerContainer getJobSerializerDeserializerContainer() {
+        return this.jobSerDeContainer;
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/base/IClusterController.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/base/IClusterController.java
index 55e4479..47a5c09 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/base/IClusterController.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/base/IClusterController.java
@@ -19,9 +19,10 @@
 import edu.uci.ics.hyracks.api.comm.NetworkAddress;
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
 import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.job.JobId;
-import edu.uci.ics.hyracks.control.common.application.ApplicationStatus;
 import edu.uci.ics.hyracks.control.common.controllers.NodeRegistration;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentStatus;
 import edu.uci.ics.hyracks.control.common.heartbeat.HeartbeatData;
 import edu.uci.ics.hyracks.control.common.job.PartitionDescriptor;
 import edu.uci.ics.hyracks.control.common.job.PartitionRequest;
@@ -40,6 +41,8 @@
 
     public void notifyJobletCleanup(JobId jobId, String nodeId) throws Exception;
 
+    public void notifyDeployBinary(DeploymentId deploymentId, String nodeId, DeploymentStatus status) throws Exception;
+
     public void nodeHeartbeat(String id, HeartbeatData hbData) throws Exception;
 
     public void reportProfile(String id, List<JobProfile> profiles) throws Exception;
@@ -48,6 +51,8 @@
 
     public void registerPartitionRequest(PartitionRequest partitionRequest) throws Exception;
 
+    public void sendApplicationMessageToCC(byte[] data, DeploymentId deploymentId, String nodeId) throws Exception;
+
     public void registerResultPartitionLocation(JobId jobId, ResultSetId rsId, boolean orderedResult, int partition,
             int nPartitions, NetworkAddress networkAddress) throws Exception;
 
@@ -55,9 +60,5 @@
 
     public void reportResultPartitionFailure(JobId jobId, ResultSetId rsId, int partition) throws Exception;
 
-    public void notifyApplicationStateChange(String nodeId, String appName, ApplicationStatus status) throws Exception;
-
-    public void sendApplicationMessageToCC(byte[] data, String appName, String nodeId) throws Exception;
-
     public void getNodeControllerInfos() throws Exception;
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/base/INodeController.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/base/INodeController.java
index 049adf8..cf27740 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/base/INodeController.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/base/INodeController.java
@@ -14,6 +14,7 @@
  */
 package edu.uci.ics.hyracks.control.common.base;
 
+import java.net.URL;
 import java.util.EnumSet;
 import java.util.List;
 import java.util.Map;
@@ -22,6 +23,7 @@
 import edu.uci.ics.hyracks.api.dataflow.ConnectorDescriptorId;
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
 import edu.uci.ics.hyracks.api.dataflow.connectors.IConnectorPolicy;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.job.JobStatus;
@@ -29,17 +31,17 @@
 import edu.uci.ics.hyracks.control.common.job.TaskAttemptDescriptor;
 
 public interface INodeController {
-    public void startTasks(String appName, JobId jobId, byte[] planBytes, List<TaskAttemptDescriptor> taskDescriptors,
+    public void startTasks(DeploymentId deploymentId, JobId jobId, byte[] planBytes,
+            List<TaskAttemptDescriptor> taskDescriptors,
             Map<ConnectorDescriptorId, IConnectorPolicy> connectorPolicies, EnumSet<JobFlag> flags) throws Exception;
 
     public void abortTasks(JobId jobId, List<TaskAttemptId> tasks) throws Exception;
 
     public void cleanUpJoblet(JobId jobId, JobStatus status) throws Exception;
 
-    public void createApplication(String appName, boolean deployHar, byte[] serializedDistributedState)
-            throws Exception;
-
-    public void destroyApplication(String appName) throws Exception;
-
     public void reportPartitionAvailability(PartitionId pid, NetworkAddress networkAddress) throws Exception;
+
+    public void deployBinary(DeploymentId deploymentId, List<URL> url) throws Exception;
+
+    public void undeployBinary(DeploymentId deploymentId) throws Exception;
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/CCConfig.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/CCConfig.java
index 6c208fe..7647410 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/CCConfig.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/CCConfig.java
@@ -17,7 +17,9 @@
 import java.io.File;
 import java.util.List;
 
+import org.kohsuke.args4j.Argument;
 import org.kohsuke.args4j.Option;
+import org.kohsuke.args4j.spi.StopOptionHandler;
 
 public class CCConfig {
     @Option(name = "-client-net-ip-address", usage = "Sets the IP Address to listen for connections from clients", required = true)
@@ -26,7 +28,7 @@
     @Option(name = "-client-net-port", usage = "Sets the port to listen for connections from clients (default 1098)")
     public int clientNetPort = 1098;
 
-    @Option(name = "-cluster-net-ip-address", usage = "Sets the IP Address to listen for connections from ", required = true)
+    @Option(name = "-cluster-net-ip-address", usage = "Sets the IP Address to listen for connections from", required = true)
     public String clusterNetIpAddress;
 
     @Option(name = "-cluster-net-port", usage = "Sets the port to listen for connections from node controllers (default 1099)")
@@ -53,9 +55,16 @@
     @Option(name = "-cc-root", usage = "Sets the root folder used for file operations. (default: ClusterControllerService)")
     public String ccRoot = "ClusterControllerService";
 
-    @Option(name = "-cluster-topology", usage = "Sets the XML file that defines the cluster topology. (default: null)")
+    @Option(name = "-cluster-topology", required = false, usage = "Sets the XML file that defines the cluster topology. (default: null)")
     public File clusterTopologyDefinition = null;
 
+    @Option(name = "-app-cc-main-class", required = false, usage = "Application CC Main Class")
+    public String appCCMainClass = null;
+
+    @Argument
+    @Option(name = "--", handler = StopOptionHandler.class)
+    public List<String> appArgs;
+
     public void toCommandLine(List<String> cList) {
         cList.add("-client-net-ip-address");
         cList.add(clientNetIpAddress);
@@ -83,5 +92,15 @@
             cList.add("-cluster-topology");
             cList.add(clusterTopologyDefinition.getAbsolutePath());
         }
+        if (appCCMainClass != null) {
+            cList.add("-app-cc-main-class");
+            cList.add(appCCMainClass);
+        }
+        if (appArgs != null && !appArgs.isEmpty()) {
+            cList.add("--");
+            for (String appArg : appArgs) {
+                cList.add(appArg);
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NCConfig.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NCConfig.java
index 5071bc9..ec29592 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NCConfig.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NCConfig.java
@@ -3,9 +3,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * you may obtain a copy of the License from
- * 
+ *
  *     http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -17,7 +17,9 @@
 import java.io.Serializable;
 import java.util.List;
 
+import org.kohsuke.args4j.Argument;
 import org.kohsuke.args4j.Option;
+import org.kohsuke.args4j.spi.StopOptionHandler;
 
 public class NCConfig implements Serializable {
     private static final long serialVersionUID = 1L;
@@ -43,24 +45,25 @@
     @Option(name = "-iodevices", usage = "Comma separated list of IO Device mount points (default: One device in default temp folder)", required = false)
     public String ioDevices = System.getProperty("java.io.tmpdir");
 
-    @Option(name = "-dcache-client-servers", usage = "Sets the list of DCache servers in the format host1:port1,host2:port2,... (default localhost:54583)")
-    public String dcacheClientServers = "localhost:54583";
-
-    @Option(name = "-dcache-client-server-local", usage = "Sets the local DCache server, if one is available, in the format host:port (default not set)")
-    public String dcacheClientServerLocal;
-
-    @Option(name = "-dcache-client-path", usage = "Sets the path to store the files retrieved from the DCache server (default /tmp/dcache-client)")
-    public String dcacheClientPath = "/tmp/dcache-client";
-
     @Option(name = "-net-thread-count", usage = "Number of threads to use for Network I/O (default: 1)")
     public int nNetThreads = 1;
 
     @Option(name = "-max-memory", usage = "Maximum memory usable at this Node Controller in bytes (default: -1 auto)")
     public int maxMemory = -1;
 
+    @Option(name = "-result-history-size", usage = "Limits the number of jobs whose results should be remembered by the system to the specified value. (default: 10)")
+    public int resultHistorySize = 100;
+
     @Option(name = "-result-manager-memory", usage = "Memory usable for result caching at this Node Controller in bytes (default: -1 auto)")
     public int resultManagerMemory = -1;
 
+    @Option(name = "-app-nc-main-class", usage = "Application NC Main Class")
+    public String appNCMainClass;
+
+    @Argument
+    @Option(name = "--", handler = StopOptionHandler.class)
+    public List<String> appArgs;
+
     public void toCommandLine(List<String> cList) {
         cList.add("-cc-host");
         cList.add(ccHost);
@@ -75,19 +78,24 @@
         cList.add(datasetIPAddress);
         cList.add("-iodevices");
         cList.add(ioDevices);
-        cList.add("-dcache-client-servers");
-        cList.add(dcacheClientServers);
-        if (dcacheClientServerLocal != null) {
-            cList.add("-dcache-client-server-local");
-            cList.add(dcacheClientServerLocal);
-        }
-        cList.add("-dcache-client-path");
-        cList.add(dcacheClientPath);
         cList.add("-net-thread-count");
         cList.add(String.valueOf(nNetThreads));
         cList.add("-max-memory");
         cList.add(String.valueOf(maxMemory));
+        cList.add("-result-history-size");
+        cList.add(String.valueOf(resultHistorySize));
         cList.add("-result-manager-memory");
         cList.add(String.valueOf(resultManagerMemory));
+
+        if (appNCMainClass != null) {
+            cList.add("-app-nc-main-class");
+            cList.add(appNCMainClass);
+        }
+        if (appArgs != null && !appArgs.isEmpty()) {
+            cList.add("--");
+            for (String appArg : appArgs) {
+                cList.add(appArg);
+            }
+        }
     }
-}
\ No newline at end of file
+}
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NodeParameters.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NodeParameters.java
index 0161f96..41e0b8d 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NodeParameters.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NodeParameters.java
@@ -23,6 +23,8 @@
 
     private ClusterControllerInfo ccInfo;
 
+    private Serializable distributedState;
+
     private int heartbeatPeriod;
 
     private int profileDumpPeriod;
@@ -35,6 +37,14 @@
         this.ccInfo = ccInfo;
     }
 
+    public Serializable getDistributedState() {
+        return distributedState;
+    }
+
+    public void setDistributedState(Serializable distributedState) {
+        this.distributedState = distributedState;
+    }
+
     public int getHeartbeatPeriod() {
         return heartbeatPeriod;
     }
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/ClassLoaderJobSerializerDeserializer.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/ClassLoaderJobSerializerDeserializer.java
new file mode 100644
index 0000000..894f59b
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/ClassLoaderJobSerializerDeserializer.java
@@ -0,0 +1,81 @@
+package edu.uci.ics.hyracks.control.common.deployment;
+
+import java.io.Serializable;
+import java.lang.reflect.Method;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.job.IJobSerializerDeserializer;
+import edu.uci.ics.hyracks.api.util.JavaSerializationUtils;
+
+public class ClassLoaderJobSerializerDeserializer implements IJobSerializerDeserializer {
+
+    private URLClassLoader classLoader;
+
+    @Override
+    public Object deserialize(byte[] jsBytes) throws HyracksException {
+        try {
+            if (classLoader == null) {
+                return JavaSerializationUtils.deserialize(jsBytes);
+            }
+            return JavaSerializationUtils.deserialize(jsBytes, classLoader);
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+
+    @Override
+    public byte[] serialize(Serializable jobSpec) throws HyracksException {
+        try {
+            if (classLoader == null) {
+                return JavaSerializationUtils.serialize(jobSpec);
+            }
+            return JavaSerializationUtils.serialize(jobSpec, classLoader);
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+
+    @Override
+    public void addClassPathURLs(List<URL> binaryURLs) throws HyracksException {
+        Collections.sort(binaryURLs, new Comparator<URL>() {
+            @Override
+            public int compare(URL o1, URL o2) {
+                return o1.getFile().compareTo(o2.getFile());
+            }
+        });
+        try {
+            if (classLoader == null) {
+                /** crate a new classloader */
+                URL[] urls = binaryURLs.toArray(new URL[binaryURLs.size()]);
+                classLoader = new URLClassLoader(urls, this.getClass().getClassLoader());
+            } else {
+                /** add URLs to the existing classloader */
+                Object[] urls = binaryURLs.toArray(new URL[binaryURLs.size()]);
+                Method method = classLoader.getClass().getDeclaredMethod("addURL", new Class[] { URL.class });
+                method.setAccessible(true);
+                method.invoke(classLoader, urls);
+            }
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+
+    @Override
+    public Class<?> loadClass(String className) throws HyracksException {
+        try {
+            return classLoader.loadClass(className);
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+
+    @Override
+    public ClassLoader getClassLoader() throws HyracksException {
+        return classLoader;
+    }
+}
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/DeploymentRun.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/DeploymentRun.java
new file mode 100644
index 0000000..519905c
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/DeploymentRun.java
@@ -0,0 +1,29 @@
+package edu.uci.ics.hyracks.control.common.deployment;
+
+import java.util.Set;
+import java.util.TreeSet;
+
+public class DeploymentRun implements IDeploymentStatusConditionVariable {
+
+    private DeploymentStatus deploymentStatus = DeploymentStatus.FAIL;
+    private final Set<String> deploymentNodeIds = new TreeSet<String>();
+
+    public DeploymentRun(Set<String> nodeIds) {
+        deploymentNodeIds.addAll(nodeIds);
+    }
+
+    public synchronized void notifyDeploymentStatus(String nodeId, DeploymentStatus status) {
+        deploymentNodeIds.remove(nodeId);
+        if (deploymentNodeIds.size() == 0) {
+            deploymentStatus = DeploymentStatus.SUCCEED;
+            notifyAll();
+        }
+    }
+
+    @Override
+    public synchronized DeploymentStatus waitForCompletion() throws Exception {
+        wait();
+        return deploymentStatus;
+    }
+
+}
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/DeploymentStatus.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/DeploymentStatus.java
new file mode 100644
index 0000000..3690518
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/DeploymentStatus.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.control.common.deployment;
+
+public enum DeploymentStatus {
+    SUCCEED,
+    FAIL
+}
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/DeploymentUtils.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/DeploymentUtils.java
new file mode 100644
index 0000000..715db96
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/DeploymentUtils.java
@@ -0,0 +1,132 @@
+package edu.uci.ics.hyracks.control.common.deployment;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.IOUtils;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.DefaultHttpClient;
+
+import edu.uci.ics.hyracks.api.application.IApplicationContext;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.job.IJobSerializerDeserializer;
+import edu.uci.ics.hyracks.api.job.IJobSerializerDeserializerContainer;
+import edu.uci.ics.hyracks.api.util.JavaSerializationUtils;
+import edu.uci.ics.hyracks.control.common.context.ServerContext;
+
+public class DeploymentUtils {
+
+    private static final String DEPLOYMENT = "applications";
+
+    public static void undeploy(DeploymentId deploymentId, IJobSerializerDeserializerContainer container,
+            ServerContext ctx) throws HyracksException {
+        container.removeJobSerializerDeserializer(deploymentId);
+        String rootDir = ctx.getBaseDir().toString();
+        String deploymentDir = rootDir.endsWith(File.separator) ? rootDir + DEPLOYMENT + File.separator + deploymentId
+                : rootDir + File.separator + DEPLOYMENT + File.separator + deploymentId;
+        try {
+            File dFile = new File(deploymentDir);
+            if (dFile.exists()) {
+                FileUtils.forceDelete(dFile);
+            }
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+
+    public static void deploy(DeploymentId deploymentId, List<URL> urls, IJobSerializerDeserializerContainer container,
+            ServerContext ctx, boolean isNC) throws HyracksException {
+        IJobSerializerDeserializer jobSerDe = container.getJobSerializerDeerializer(deploymentId);
+        if (jobSerDe == null) {
+            jobSerDe = new ClassLoaderJobSerializerDeserializer();
+            container.addJobSerializerDeserializer(deploymentId, jobSerDe);
+        }
+        String rootDir = ctx.getBaseDir().toString();
+        String deploymentDir = rootDir.endsWith(File.separator) ? rootDir + DEPLOYMENT + File.separator + deploymentId
+                : rootDir + File.separator + DEPLOYMENT + File.separator + deploymentId;
+        jobSerDe.addClassPathURLs(downloadURLs(urls, deploymentDir, isNC));
+    }
+
+    public static Object deserialize(byte[] bytes, DeploymentId deploymentId, IApplicationContext appCtx)
+            throws HyracksException {
+        try {
+            IJobSerializerDeserializerContainer jobSerDeContainer = appCtx.getJobSerializerDeserializerContainer();
+            IJobSerializerDeserializer jobSerDe = deploymentId == null ? null : jobSerDeContainer
+                    .getJobSerializerDeerializer(deploymentId);
+            Object obj = jobSerDe == null ? JavaSerializationUtils.deserialize(bytes) : jobSerDe.deserialize(bytes);
+            return obj;
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+
+    public static Class<?> loadClass(String className, DeploymentId deploymentId, IApplicationContext appCtx)
+            throws HyracksException {
+        try {
+            IJobSerializerDeserializerContainer jobSerDeContainer = appCtx.getJobSerializerDeserializerContainer();
+            IJobSerializerDeserializer jobSerDe = deploymentId == null ? null : jobSerDeContainer
+                    .getJobSerializerDeerializer(deploymentId);
+            Class<?> cl = jobSerDe == null ? JavaSerializationUtils.loadClass(className) : jobSerDe
+                    .loadClass(className);
+            return cl;
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+
+    public static ClassLoader getClassLoader(DeploymentId deploymentId, IApplicationContext appCtx)
+            throws HyracksException {
+        try {
+            IJobSerializerDeserializerContainer jobSerDeContainer = appCtx.getJobSerializerDeserializerContainer();
+            IJobSerializerDeserializer jobSerDe = deploymentId == null ? null : jobSerDeContainer
+                    .getJobSerializerDeerializer(deploymentId);
+            ClassLoader cl = jobSerDe == null ? DeploymentUtils.class.getClassLoader() : jobSerDe.getClassLoader();
+            return cl;
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+
+    private static List<URL> downloadURLs(List<URL> urls, String deploymentDir, boolean isNC) throws HyracksException {
+        try {
+            List<URL> downloadedFileURLs = new ArrayList<URL>();
+            File dir = new File(deploymentDir);
+            if (!dir.exists()) {
+                FileUtils.forceMkdir(dir);
+            }
+            for (URL url : urls) {
+                String urlString = url.toString();
+                int slashIndex = urlString.lastIndexOf('/');
+                String fileName = urlString.substring(slashIndex + 1).split("&")[1];
+                String filePath = deploymentDir + File.separator + fileName;
+                File targetFile = new File(filePath);
+                if (isNC) {
+                    HttpClient hc = new DefaultHttpClient();
+                    HttpGet get = new HttpGet(url.toString());
+                    HttpResponse response = hc.execute(get);
+                    InputStream is = response.getEntity().getContent();
+                    OutputStream os = new FileOutputStream(targetFile);
+                    try {
+                        IOUtils.copyLarge(is, os);
+                    } finally {
+                        os.close();
+                        is.close();
+                    }
+                }
+                downloadedFileURLs.add(targetFile.toURI().toURL());
+            }
+            return downloadedFileURLs;
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+}
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/IDeploymentStatusConditionVariable.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/IDeploymentStatusConditionVariable.java
new file mode 100644
index 0000000..06e398e
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/deployment/IDeploymentStatusConditionVariable.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.control.common.deployment;
+
+public interface IDeploymentStatusConditionVariable {
+
+    public DeploymentStatus waitForCompletion() throws Exception;
+}
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/CCNCFunctions.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/CCNCFunctions.java
index b506b12..e343657 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/CCNCFunctions.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/CCNCFunctions.java
@@ -21,6 +21,7 @@
 import java.io.IOException;
 import java.io.OutputStream;
 import java.io.Serializable;
+import java.net.URL;
 import java.nio.ByteBuffer;
 import java.util.EnumSet;
 import java.util.List;
@@ -37,13 +38,14 @@
 import edu.uci.ics.hyracks.api.dataflow.TaskId;
 import edu.uci.ics.hyracks.api.dataflow.connectors.IConnectorPolicy;
 import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.job.JobStatus;
 import edu.uci.ics.hyracks.api.partitions.PartitionId;
-import edu.uci.ics.hyracks.control.common.application.ApplicationStatus;
 import edu.uci.ics.hyracks.control.common.controllers.NodeParameters;
 import edu.uci.ics.hyracks.control.common.controllers.NodeRegistration;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentStatus;
 import edu.uci.ics.hyracks.control.common.heartbeat.HeartbeatData;
 import edu.uci.ics.hyracks.control.common.job.PartitionDescriptor;
 import edu.uci.ics.hyracks.control.common.job.PartitionRequest;
@@ -72,27 +74,32 @@
         REGISTER_RESULT_PARTITION_LOCATION,
         REPORT_RESULT_PARTITION_WRITE_COMPLETION,
         REPORT_RESULT_PARTITION_FAILURE,
-        APPLICATION_STATE_CHANGE_RESPONSE,
 
         NODE_REGISTRATION_RESULT,
         START_TASKS,
         ABORT_TASKS,
         CLEANUP_JOBLET,
-        CREATE_APPLICATION,
-        DESTROY_APPLICATION,
         REPORT_PARTITION_AVAILABILITY,
         SEND_APPLICATION_MESSAGE,
         GET_NODE_CONTROLLERS_INFO,
         GET_NODE_CONTROLLERS_INFO_RESPONSE,
 
+        DEPLOY_BINARY,
+        NOTIFY_DEPLOY_BINARY,
+        UNDEPLOY_BINARY,
+
         OTHER
     }
 
     public static class SendApplicationMessageFunction extends Function {
         private static final long serialVersionUID = 1L;
         private byte[] serializedMessage;
+        private DeploymentId deploymentId;
         private String nodeId;
-        private String appName;
+
+        public DeploymentId getDeploymentId() {
+            return deploymentId;
+        }
 
         public String getNodeId() {
             return nodeId;
@@ -106,11 +113,10 @@
             return serializedMessage;
         }
 
-        public SendApplicationMessageFunction(byte[] data, String appName, String nodeId) {
-            super();
+        public SendApplicationMessageFunction(byte[] data, DeploymentId deploymentId, String nodeId) {
             this.serializedMessage = data;
+            this.deploymentId = deploymentId;
             this.nodeId = nodeId;
-            this.appName = appName;
         }
 
         @Override
@@ -118,10 +124,6 @@
             return FunctionId.SEND_APPLICATION_MESSAGE;
         }
 
-        public String getAppName() {
-            return appName;
-        }
-
     }
 
     public static abstract class Function implements Serializable {
@@ -563,37 +565,6 @@
         }
     }
 
-    public static class ApplicationStateChangeResponseFunction extends Function {
-        private static final long serialVersionUID = 1L;
-
-        private final String nodeId;
-        private final String appName;
-        private final ApplicationStatus status;
-
-        public ApplicationStateChangeResponseFunction(String nodeId, String appName, ApplicationStatus status) {
-            this.nodeId = nodeId;
-            this.appName = appName;
-            this.status = status;
-        }
-
-        @Override
-        public FunctionId getFunctionId() {
-            return FunctionId.APPLICATION_STATE_CHANGE_RESPONSE;
-        }
-
-        public String getNodeId() {
-            return nodeId;
-        }
-
-        public String getApplicationName() {
-            return appName;
-        }
-
-        public ApplicationStatus getStatus() {
-            return status;
-        }
-    }
-
     public static class NodeRegistrationResult extends Function {
         private static final long serialVersionUID = 1L;
 
@@ -623,17 +594,17 @@
     public static class StartTasksFunction extends Function {
         private static final long serialVersionUID = 1L;
 
-        private final String appName;
+        private final DeploymentId deploymentId;
         private final JobId jobId;
         private final byte[] planBytes;
         private final List<TaskAttemptDescriptor> taskDescriptors;
         private final Map<ConnectorDescriptorId, IConnectorPolicy> connectorPolicies;
         private final EnumSet<JobFlag> flags;
 
-        public StartTasksFunction(String appName, JobId jobId, byte[] planBytes,
+        public StartTasksFunction(DeploymentId deploymentId, JobId jobId, byte[] planBytes,
                 List<TaskAttemptDescriptor> taskDescriptors,
                 Map<ConnectorDescriptorId, IConnectorPolicy> connectorPolicies, EnumSet<JobFlag> flags) {
-            this.appName = appName;
+            this.deploymentId = deploymentId;
             this.jobId = jobId;
             this.planBytes = planBytes;
             this.taskDescriptors = taskDescriptors;
@@ -646,8 +617,8 @@
             return FunctionId.START_TASKS;
         }
 
-        public String getAppName() {
-            return appName;
+        public DeploymentId getDeploymentId() {
+            return deploymentId;
         }
 
         public JobId getJobId() {
@@ -721,56 +692,6 @@
         }
     }
 
-    public static class CreateApplicationFunction extends Function {
-        private static final long serialVersionUID = 1L;
-
-        private final String appName;
-        private final boolean deployHar;
-        private final byte[] serializedDistributedState;
-
-        public CreateApplicationFunction(String appName, boolean deployHar, byte[] serializedDistributedState) {
-            this.appName = appName;
-            this.deployHar = deployHar;
-            this.serializedDistributedState = serializedDistributedState;
-        }
-
-        @Override
-        public FunctionId getFunctionId() {
-            return FunctionId.CREATE_APPLICATION;
-        }
-
-        public String getAppName() {
-            return appName;
-        }
-
-        public boolean isDeployHar() {
-            return deployHar;
-        }
-
-        public byte[] getSerializedDistributedState() {
-            return serializedDistributedState;
-        }
-    }
-
-    public static class DestroyApplicationFunction extends Function {
-        private static final long serialVersionUID = 1L;
-
-        private final String appName;
-
-        public DestroyApplicationFunction(String appName) {
-            this.appName = appName;
-        }
-
-        @Override
-        public FunctionId getFunctionId() {
-            return FunctionId.DESTROY_APPLICATION;
-        }
-
-        public String getAppName() {
-            return appName;
-        }
-    }
-
     public static class GetNodeControllersInfoFunction extends Function {
         private static final long serialVersionUID = 1L;
 
@@ -849,6 +770,81 @@
         }
     }
 
+    public static class DeployBinaryFunction extends Function {
+        private static final long serialVersionUID = 1L;
+
+        private final List<URL> binaryURLs;
+        private final DeploymentId deploymentId;
+
+        public DeployBinaryFunction(DeploymentId deploymentId, List<URL> binaryURLs) {
+            this.binaryURLs = binaryURLs;
+            this.deploymentId = deploymentId;
+        }
+
+        @Override
+        public FunctionId getFunctionId() {
+            return FunctionId.DEPLOY_BINARY;
+        }
+
+        public List<URL> getBinaryURLs() {
+            return binaryURLs;
+        }
+
+        public DeploymentId getDeploymentId() {
+            return deploymentId;
+        }
+    }
+
+    public static class UnDeployBinaryFunction extends Function {
+        private static final long serialVersionUID = 1L;
+
+        private final DeploymentId deploymentId;
+
+        public UnDeployBinaryFunction(DeploymentId deploymentId) {
+            this.deploymentId = deploymentId;
+        }
+
+        @Override
+        public FunctionId getFunctionId() {
+            return FunctionId.UNDEPLOY_BINARY;
+        }
+
+        public DeploymentId getDeploymentId() {
+            return deploymentId;
+        }
+    }
+
+    public static class NotifyDeployBinaryFunction extends Function {
+        private static final long serialVersionUID = 1L;
+
+        private final String nodeId;
+        private final DeploymentId deploymentId;
+        private final DeploymentStatus deploymentStatus;
+
+        public NotifyDeployBinaryFunction(DeploymentId deploymentId, String nodeId, DeploymentStatus deploymentStatus) {
+            this.nodeId = nodeId;
+            this.deploymentId = deploymentId;
+            this.deploymentStatus = deploymentStatus;
+        }
+
+        @Override
+        public FunctionId getFunctionId() {
+            return FunctionId.NOTIFY_DEPLOY_BINARY;
+        }
+
+        public String getNodeId() {
+            return nodeId;
+        }
+
+        public DeploymentId getDeploymentId() {
+            return deploymentId;
+        }
+
+        public DeploymentStatus getDeploymentStatus() {
+            return deploymentStatus;
+        }
+    }
+
     public static class SerializerDeserializer implements IPayloadSerializerDeserializer {
         private final JavaSerializationBasedPayloadSerializerDeserializer javaSerde;
 
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/ClusterControllerRemoteProxy.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/ClusterControllerRemoteProxy.java
index 091a5d2..5ed65cc 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/ClusterControllerRemoteProxy.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/ClusterControllerRemoteProxy.java
@@ -19,10 +19,11 @@
 import edu.uci.ics.hyracks.api.comm.NetworkAddress;
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
 import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.job.JobId;
-import edu.uci.ics.hyracks.control.common.application.ApplicationStatus;
 import edu.uci.ics.hyracks.control.common.base.IClusterController;
 import edu.uci.ics.hyracks.control.common.controllers.NodeRegistration;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentStatus;
 import edu.uci.ics.hyracks.control.common.heartbeat.HeartbeatData;
 import edu.uci.ics.hyracks.control.common.job.PartitionDescriptor;
 import edu.uci.ics.hyracks.control.common.job.PartitionRequest;
@@ -71,6 +72,13 @@
     }
 
     @Override
+    public void notifyDeployBinary(DeploymentId deploymentId, String nodeId, DeploymentStatus status) throws Exception {
+        CCNCFunctions.NotifyDeployBinaryFunction fn = new CCNCFunctions.NotifyDeployBinaryFunction(deploymentId,
+                nodeId, status);
+        ipcHandle.send(-1, fn, null);
+    }
+
+    @Override
     public void nodeHeartbeat(String id, HeartbeatData hbData) throws Exception {
         CCNCFunctions.NodeHeartbeatFunction fn = new CCNCFunctions.NodeHeartbeatFunction(id, hbData);
         ipcHandle.send(-1, fn, null);
@@ -97,6 +105,12 @@
     }
 
     @Override
+    public void sendApplicationMessageToCC(byte[] data, DeploymentId deploymentId, String nodeId) throws Exception {
+        CCNCFunctions.SendApplicationMessageFunction fn = new CCNCFunctions.SendApplicationMessageFunction(data,
+                deploymentId, nodeId);
+        ipcHandle.send(-1, fn, null);
+    }
+
     public void registerResultPartitionLocation(JobId jobId, ResultSetId rsId, boolean orderedResult, int partition,
             int nPartitions, NetworkAddress networkAddress) throws Exception {
         CCNCFunctions.RegisterResultPartitionLocationFunction fn = new CCNCFunctions.RegisterResultPartitionLocationFunction(
@@ -119,21 +133,8 @@
     }
 
     @Override
-    public void notifyApplicationStateChange(String nodeId, String appName, ApplicationStatus status) throws Exception {
-        CCNCFunctions.ApplicationStateChangeResponseFunction fn = new CCNCFunctions.ApplicationStateChangeResponseFunction(
-                nodeId, appName, status);
-        ipcHandle.send(-1, fn, null);
-    }
-
-    @Override
-    public void sendApplicationMessageToCC(byte[] data, String appName, String nodeId) throws Exception {
-        CCNCFunctions.SendApplicationMessageFunction fn = new CCNCFunctions.SendApplicationMessageFunction(data,
-                appName, nodeId);
-        ipcHandle.send(-1, fn, null);
-    }
-
-    @Override
     public void getNodeControllerInfos() throws Exception {
         ipcHandle.send(-1, new CCNCFunctions.GetNodeControllersInfoFunction(), null);
     }
+
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/NodeControllerRemoteProxy.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/NodeControllerRemoteProxy.java
index 10c0a7c..8346ecb 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/NodeControllerRemoteProxy.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/NodeControllerRemoteProxy.java
@@ -14,6 +14,7 @@
  */
 package edu.uci.ics.hyracks.control.common.ipc;
 
+import java.net.URL;
 import java.util.EnumSet;
 import java.util.List;
 import java.util.Map;
@@ -22,6 +23,7 @@
 import edu.uci.ics.hyracks.api.dataflow.ConnectorDescriptorId;
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
 import edu.uci.ics.hyracks.api.dataflow.connectors.IConnectorPolicy;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.job.JobStatus;
@@ -38,9 +40,10 @@
     }
 
     @Override
-    public void startTasks(String appName, JobId jobId, byte[] planBytes, List<TaskAttemptDescriptor> taskDescriptors,
+    public void startTasks(DeploymentId deploymentId, JobId jobId, byte[] planBytes,
+            List<TaskAttemptDescriptor> taskDescriptors,
             Map<ConnectorDescriptorId, IConnectorPolicy> connectorPolicies, EnumSet<JobFlag> flags) throws Exception {
-        CCNCFunctions.StartTasksFunction stf = new CCNCFunctions.StartTasksFunction(appName, jobId, planBytes,
+        CCNCFunctions.StartTasksFunction stf = new CCNCFunctions.StartTasksFunction(deploymentId, jobId, planBytes,
                 taskDescriptors, connectorPolicies, flags);
         ipcHandle.send(-1, stf, null);
     }
@@ -58,23 +61,21 @@
     }
 
     @Override
-    public void createApplication(String appName, boolean deployHar, byte[] serializedDistributedState)
-            throws Exception {
-        CCNCFunctions.CreateApplicationFunction caf = new CCNCFunctions.CreateApplicationFunction(appName, deployHar,
-                serializedDistributedState);
-        ipcHandle.send(-1, caf, null);
-    }
-
-    @Override
-    public void destroyApplication(String appName) throws Exception {
-        CCNCFunctions.DestroyApplicationFunction daf = new CCNCFunctions.DestroyApplicationFunction(appName);
-        ipcHandle.send(-1, daf, null);
-    }
-
-    @Override
     public void reportPartitionAvailability(PartitionId pid, NetworkAddress networkAddress) throws Exception {
         CCNCFunctions.ReportPartitionAvailabilityFunction rpaf = new CCNCFunctions.ReportPartitionAvailabilityFunction(
                 pid, networkAddress);
         ipcHandle.send(-1, rpaf, null);
     }
+
+    @Override
+    public void deployBinary(DeploymentId deploymentId, List<URL> binaryURLs) throws Exception {
+        CCNCFunctions.DeployBinaryFunction rpaf = new CCNCFunctions.DeployBinaryFunction(deploymentId, binaryURLs);
+        ipcHandle.send(-1, rpaf, null);
+    }
+
+    @Override
+    public void undeployBinary(DeploymentId deploymentId) throws Exception {
+        CCNCFunctions.UnDeployBinaryFunction rpaf = new CCNCFunctions.UnDeployBinaryFunction(deploymentId);
+        ipcHandle.send(-1, rpaf, null);
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-nc/pom.xml b/hyracks/hyracks-control/hyracks-control-nc/pom.xml
index b6eff7a..ad83d86 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/pom.xml
+++ b/hyracks/hyracks-control/hyracks-control-nc/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-control</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -24,27 +24,21 @@
   </build>
   <dependencies>
   	<dependency>
-  		<groupId>edu.uci.ics.dcache</groupId>
-  		<artifactId>dcache-client</artifactId>
-  		<version>0.0.1</version>
-  		<scope>compile</scope>
-  	</dependency>
-  	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-net</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-comm</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   	</dependency>
   </dependencies>
   <reporting>
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/Joblet.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/Joblet.java
index 3855b4d..c6a03dc 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/Joblet.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/Joblet.java
@@ -27,6 +27,7 @@
 import edu.uci.ics.hyracks.api.context.IHyracksJobletContext;
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
 import edu.uci.ics.hyracks.api.dataflow.state.IStateObject;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.api.io.FileReference;
@@ -43,6 +44,7 @@
 import edu.uci.ics.hyracks.api.job.profiling.counters.ICounterContext;
 import edu.uci.ics.hyracks.api.partitions.PartitionId;
 import edu.uci.ics.hyracks.api.resources.IDeallocatable;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentUtils;
 import edu.uci.ics.hyracks.control.common.job.PartitionRequest;
 import edu.uci.ics.hyracks.control.common.job.PartitionState;
 import edu.uci.ics.hyracks.control.common.job.profiling.counters.Counter;
@@ -58,6 +60,8 @@
 
     private final INCApplicationContext appCtx;
 
+    private final DeploymentId deploymentId;
+
     private final JobId jobId;
 
     private final ActivityClusterGraph acg;
@@ -86,10 +90,11 @@
 
     private boolean cleanupPending;
 
-    public Joblet(NodeControllerService nodeController, JobId jobId, INCApplicationContext appCtx,
-            ActivityClusterGraph acg) {
+    public Joblet(NodeControllerService nodeController, DeploymentId deploymentId, JobId jobId,
+            INCApplicationContext appCtx, ActivityClusterGraph acg) {
         this.nodeController = nodeController;
         this.appCtx = appCtx;
+        this.deploymentId = deploymentId;
         this.jobId = jobId;
         this.frameSize = acg.getFrameSize();
         this.acg = acg;
@@ -283,4 +288,22 @@
             e.printStackTrace();
         }
     }
+
+    @Override
+    public Class<?> loadClass(String className) {
+        try {
+            return DeploymentUtils.loadClass(className, deploymentId, appCtx);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Override
+    public ClassLoader getClassLoader() {
+        try {
+            return DeploymentUtils.getClassLoader(deploymentId, appCtx);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/NCDriver.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/NCDriver.java
index dde7abc..d31d09e 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/NCDriver.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/NCDriver.java
@@ -16,8 +16,6 @@
 
 import org.kohsuke.args4j.CmdLineParser;
 
-import edu.uci.ics.dcache.client.DCacheClient;
-import edu.uci.ics.dcache.client.DCacheClientConfig;
 import edu.uci.ics.hyracks.control.common.controllers.NCConfig;
 
 public class NCDriver {
@@ -32,13 +30,6 @@
             return;
         }
 
-        DCacheClientConfig dccConfig = new DCacheClientConfig();
-        dccConfig.servers = ncConfig.dcacheClientServers;
-        dccConfig.serverLocal = ncConfig.dcacheClientServerLocal;
-        dccConfig.path = ncConfig.dcacheClientPath;
-
-        DCacheClient.get().init(dccConfig);
-
         final NodeControllerService nService = new NodeControllerService(ncConfig);
         nService.start();
         Runtime.getRuntime().addShutdownHook(new Thread() {
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/NodeControllerService.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/NodeControllerService.java
index 8a36dac..a1c3b08 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/NodeControllerService.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/NodeControllerService.java
@@ -43,9 +43,11 @@
 import org.apache.commons.lang3.mutable.Mutable;
 import org.apache.commons.lang3.mutable.MutableObject;
 
+import edu.uci.ics.hyracks.api.application.INCApplicationEntryPoint;
 import edu.uci.ics.hyracks.api.client.NodeControllerInfo;
 import edu.uci.ics.hyracks.api.context.IHyracksRootContext;
 import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionManager;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.io.IODeviceHandle;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.control.common.AbstractRemoteService;
@@ -72,10 +74,10 @@
 import edu.uci.ics.hyracks.control.nc.work.ApplicationMessageWork;
 import edu.uci.ics.hyracks.control.nc.work.BuildJobProfilesWork;
 import edu.uci.ics.hyracks.control.nc.work.CleanupJobletWork;
-import edu.uci.ics.hyracks.control.nc.work.CreateApplicationWork;
-import edu.uci.ics.hyracks.control.nc.work.DestroyApplicationWork;
+import edu.uci.ics.hyracks.control.nc.work.DeployBinaryWork;
 import edu.uci.ics.hyracks.control.nc.work.ReportPartitionAvailabilityWork;
 import edu.uci.ics.hyracks.control.nc.work.StartTasksWork;
+import edu.uci.ics.hyracks.control.nc.work.UnDeployBinaryWork;
 import edu.uci.ics.hyracks.ipc.api.IIPCHandle;
 import edu.uci.ics.hyracks.ipc.api.IIPCI;
 import edu.uci.ics.hyracks.ipc.api.IPCPerformanceCounters;
@@ -121,7 +123,9 @@
 
     private final ServerContext serverCtx;
 
-    private final Map<String, NCApplicationContext> applications;
+    private NCApplicationContext appCtx;
+
+    private INCApplicationEntryPoint ncAppEntryPoint;
 
     private final MemoryMXBean memoryMXBean;
 
@@ -149,7 +153,8 @@
         partitionManager = new PartitionManager(this);
         netManager = new NetworkManager(getIpAddress(ncConfig.dataIPAddress), partitionManager, ncConfig.nNetThreads);
 
-        datasetPartitionManager = new DatasetPartitionManager(this, executor, ncConfig.resultManagerMemory);
+        datasetPartitionManager = new DatasetPartitionManager(this, executor, ncConfig.resultManagerMemory,
+                ncConfig.resultHistorySize);
         datasetNetworkManager = new DatasetNetworkManager(getIpAddress(ncConfig.datasetIPAddress),
                 datasetPartitionManager, ncConfig.nNetThreads);
 
@@ -158,7 +163,6 @@
         timer = new Timer(true);
         serverCtx = new ServerContext(ServerContext.ServerType.NODE_CONTROLLER, new File(new File(
                 NodeControllerService.class.getName()), id));
-        applications = new Hashtable<String, NCApplicationContext>();
         memoryMXBean = ManagementFactory.getMemoryMXBean();
         gcMXBeans = ManagementFactory.getGarbageCollectorMXBeans();
         threadMXBean = ManagementFactory.getThreadMXBean();
@@ -172,6 +176,10 @@
         return ctx;
     }
 
+    public NCApplicationContext getApplicationContext() {
+        return appCtx;
+    }
+
     private static List<IODeviceHandle> getDevices(String ioDevices) {
         List<IODeviceHandle> devices = new ArrayList<IODeviceHandle>();
         StringTokenizer tok = new StringTokenizer(ioDevices, ",");
@@ -216,6 +224,9 @@
         LOGGER.log(Level.INFO, "Starting NodeControllerService");
         ipc.start();
         netManager.start();
+
+        startApplication();
+
         datasetNetworkManager.start();
         IIPCHandle ccIPCHandle = ipc.getHandle(new InetSocketAddress(ncConfig.ccHost, ncConfig.ccPort));
         this.ccs = new ClusterControllerRemoteProxy(ccIPCHandle);
@@ -239,6 +250,7 @@
         if (registrationException != null) {
             throw registrationException;
         }
+        appCtx.setDistributedState(nodeParameters.getDistributedState());
 
         queue.start();
 
@@ -253,6 +265,21 @@
         }
 
         LOGGER.log(Level.INFO, "Started NodeControllerService");
+        if (ncAppEntryPoint != null) {
+            ncAppEntryPoint.notifyStartupComplete();
+        }
+    }
+
+    private void startApplication() throws Exception {
+        appCtx = new NCApplicationContext(serverCtx, ctx, id);
+        String className = ncConfig.appNCMainClass;
+        if (className != null) {
+            Class<?> c = Class.forName(className);
+            ncAppEntryPoint = (INCApplicationEntryPoint) c.newInstance();
+            String[] args = ncConfig.appArgs == null ? new String[0] : ncConfig.appArgs
+                    .toArray(new String[ncConfig.appArgs.size()]);
+            ncAppEntryPoint.start(appCtx, args);
+        }
     }
 
     @Override
@@ -276,10 +303,6 @@
         return serverCtx;
     }
 
-    public Map<String, NCApplicationContext> getApplications() {
-        return applications;
-    }
-
     public Map<JobId, Joblet> getJobletMap() {
         return jobletMap;
     }
@@ -424,13 +447,14 @@
                 case SEND_APPLICATION_MESSAGE: {
                     CCNCFunctions.SendApplicationMessageFunction amf = (CCNCFunctions.SendApplicationMessageFunction) fn;
                     queue.schedule(new ApplicationMessageWork(NodeControllerService.this, amf.getMessage(), amf
-                            .getAppName(), amf.getNodeId()));
+                            .getDeploymentId(), amf.getNodeId()));
                     return;
                 }
                 case START_TASKS: {
                     CCNCFunctions.StartTasksFunction stf = (CCNCFunctions.StartTasksFunction) fn;
-                    queue.schedule(new StartTasksWork(NodeControllerService.this, stf.getAppName(), stf.getJobId(), stf
-                            .getPlanBytes(), stf.getTaskDescriptors(), stf.getConnectorPolicies(), stf.getFlags()));
+                    queue.schedule(new StartTasksWork(NodeControllerService.this, stf.getDeploymentId(),
+                            stf.getJobId(), stf.getPlanBytes(), stf.getTaskDescriptors(), stf.getConnectorPolicies(),
+                            stf.getFlags()));
                     return;
                 }
 
@@ -446,19 +470,6 @@
                     return;
                 }
 
-                case CREATE_APPLICATION: {
-                    CCNCFunctions.CreateApplicationFunction caf = (CCNCFunctions.CreateApplicationFunction) fn;
-                    queue.schedule(new CreateApplicationWork(NodeControllerService.this, caf.getAppName(), caf
-                            .isDeployHar(), caf.getSerializedDistributedState()));
-                    return;
-                }
-
-                case DESTROY_APPLICATION: {
-                    CCNCFunctions.DestroyApplicationFunction daf = (CCNCFunctions.DestroyApplicationFunction) fn;
-                    queue.schedule(new DestroyApplicationWork(NodeControllerService.this, daf.getAppName()));
-                    return;
-                }
-
                 case REPORT_PARTITION_AVAILABILITY: {
                     CCNCFunctions.ReportPartitionAvailabilityFunction rpaf = (CCNCFunctions.ReportPartitionAvailabilityFunction) fn;
                     queue.schedule(new ReportPartitionAvailabilityWork(NodeControllerService.this, rpaf
@@ -477,17 +488,30 @@
                     setNodeControllersInfo(gncirf.getNodeControllerInfos());
                     return;
                 }
+
+                case DEPLOY_BINARY: {
+                    CCNCFunctions.DeployBinaryFunction ndbf = (CCNCFunctions.DeployBinaryFunction) fn;
+                    queue.schedule(new DeployBinaryWork(NodeControllerService.this, ndbf.getDeploymentId(), ndbf
+                            .getBinaryURLs()));
+                    return;
+                }
+
+                case UNDEPLOY_BINARY: {
+                    CCNCFunctions.UnDeployBinaryFunction ndbf = (CCNCFunctions.UnDeployBinaryFunction) fn;
+                    queue.schedule(new UnDeployBinaryWork(NodeControllerService.this, ndbf.getDeploymentId()));
+                    return;
+                }
             }
             throw new IllegalArgumentException("Unknown function: " + fn.getFunctionId());
 
         }
     }
 
-    public IDatasetPartitionManager getDatasetPartitionManager() {
-        return datasetPartitionManager;
+    public void sendApplicationMessageToCC(byte[] data, DeploymentId deploymentId, String nodeId) throws Exception {
+        ccs.sendApplicationMessageToCC(data, deploymentId, nodeId);
     }
 
-    public void sendApplicationMessageToCC(byte[] data, String appName, String nodeId) throws Exception {
-        ccs.sendApplicationMessageToCC(data, appName, nodeId);
+    public IDatasetPartitionManager getDatasetPartitionManager() {
+        return datasetPartitionManager;
     }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/Task.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/Task.java
index 5a3e9dd..ac76c16 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/Task.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/Task.java
@@ -35,6 +35,7 @@
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
 import edu.uci.ics.hyracks.api.dataflow.state.IStateObject;
 import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionManager;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.api.io.FileReference;
@@ -354,8 +355,7 @@
     }
 
     @Override
-    public void sendApplicationMessageToCC(byte[] message, String nodeId) throws Exception {
-        this.ncs.sendApplicationMessageToCC(message, this.getJobletContext().getApplicationContext()
-                .getApplicationName(), nodeId);
+    public void sendApplicationMessageToCC(byte[] message, DeploymentId deploymentId, String nodeId) throws Exception {
+        this.ncs.sendApplicationMessageToCC(message, deploymentId, nodeId);
     }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/application/NCApplicationContext.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/application/NCApplicationContext.java
index 1121c6c..3e07fb5 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/application/NCApplicationContext.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/application/NCApplicationContext.java
@@ -4,7 +4,6 @@
 import java.io.Serializable;
 
 import edu.uci.ics.hyracks.api.application.INCApplicationContext;
-import edu.uci.ics.hyracks.api.application.INCBootstrap;
 import edu.uci.ics.hyracks.api.context.IHyracksRootContext;
 import edu.uci.ics.hyracks.control.common.application.ApplicationContext;
 import edu.uci.ics.hyracks.control.common.context.ServerContext;
@@ -14,9 +13,8 @@
     private final IHyracksRootContext rootCtx;
     private Object appObject;
 
-    public NCApplicationContext(ServerContext serverCtx, IHyracksRootContext rootCtx, String appName, String nodeId)
-            throws IOException {
-        super(serverCtx, appName);
+    public NCApplicationContext(ServerContext serverCtx, IHyracksRootContext rootCtx, String nodeId) throws IOException {
+        super(serverCtx);
         this.nodeId = nodeId;
         this.rootCtx = rootCtx;
     }
@@ -31,19 +29,6 @@
     }
 
     @Override
-    protected void start() throws Exception {
-        ((INCBootstrap) bootstrap).setApplicationContext(this);
-        bootstrap.start();
-    }
-
-    @Override
-    protected void stop() throws Exception {
-        if (bootstrap != null) {
-            bootstrap.stop();
-        }
-    }
-
-    @Override
     public IHyracksRootContext getRootContext() {
         return rootCtx;
     }
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionManager.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionManager.java
index 1cad54b..af9a607 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionManager.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionManager.java
@@ -14,7 +14,7 @@
  */
 package edu.uci.ics.hyracks.control.nc.dataset;
 
-import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.concurrent.Executor;
 
@@ -44,13 +44,26 @@
 
     private final DatasetMemoryManager datasetMemoryManager;
 
-    public DatasetPartitionManager(NodeControllerService ncs, Executor executor, int availableMemory) {
+    public DatasetPartitionManager(NodeControllerService ncs, Executor executor, int availableMemory,
+            final int resultHistorySize) {
         this.ncs = ncs;
         this.executor = executor;
-        partitionResultStateMap = new HashMap<JobId, ResultState[]>();
         deallocatableRegistry = new DefaultDeallocatableRegistry();
         fileFactory = new WorkspaceFileFactory(deallocatableRegistry, (IOManager) ncs.getRootContext().getIOManager());
         datasetMemoryManager = new DatasetMemoryManager(availableMemory);
+        partitionResultStateMap = new LinkedHashMap<JobId, ResultState[]>() {
+            private static final long serialVersionUID = 1L;
+
+            protected boolean removeEldestEntry(Map.Entry<JobId, ResultState[]> eldest) {
+                if (size() > resultHistorySize) {
+                    for (ResultState state : eldest.getValue()) {
+                        state.deinit();
+                    }
+                    return true;
+                }
+                return false;
+            }
+        };
     }
 
     @Override
@@ -59,16 +72,18 @@
         DatasetPartitionWriter dpw = null;
         JobId jobId = ctx.getJobletContext().getJobId();
         try {
-            ncs.getClusterController().registerResultPartitionLocation(jobId, rsId, orderedResult, partition,
-                    nPartitions, ncs.getDatasetNetworkManager().getNetworkAddress());
-            dpw = new DatasetPartitionWriter(ctx, this, jobId, rsId, partition, datasetMemoryManager);
+            synchronized (partitionResultStateMap) {
+                ncs.getClusterController().registerResultPartitionLocation(jobId, rsId, orderedResult, partition,
+                        nPartitions, ncs.getDatasetNetworkManager().getNetworkAddress());
+                dpw = new DatasetPartitionWriter(ctx, this, jobId, rsId, partition, datasetMemoryManager);
 
-            ResultState[] resultStates = partitionResultStateMap.get(jobId);
-            if (resultStates == null) {
-                resultStates = new ResultState[nPartitions];
-                partitionResultStateMap.put(jobId, resultStates);
+                ResultState[] resultStates = partitionResultStateMap.get(jobId);
+                if (resultStates == null) {
+                    resultStates = new ResultState[nPartitions];
+                    partitionResultStateMap.put(jobId, resultStates);
+                }
+                resultStates[partition] = dpw.getResultState();
             }
-            resultStates[partition] = dpw.getResultState();
         } catch (Exception e) {
             throw new HyracksException(e);
         }
@@ -97,15 +112,18 @@
     @Override
     public void initializeDatasetPartitionReader(JobId jobId, int partition, IFrameWriter writer)
             throws HyracksException {
-        ResultState[] resultStates = partitionResultStateMap.get(jobId);
+        ResultState resultState;
+        synchronized (partitionResultStateMap) {
+            ResultState[] resultStates = partitionResultStateMap.get(jobId);
 
-        if (resultStates == null) {
-            throw new HyracksException("Unknown JobId " + jobId);
-        }
+            if (resultStates == null) {
+                throw new HyracksException("Unknown JobId " + jobId);
+            }
 
-        ResultState resultState = resultStates[partition];
-        if (resultState == null) {
-            throw new HyracksException("No DatasetPartitionWriter for partition " + partition);
+            resultState = resultStates[partition];
+            if (resultState == null) {
+                throw new HyracksException("No DatasetPartitionWriter for partition " + partition);
+            }
         }
 
         IDatasetPartitionReader dpr = new DatasetPartitionReader(datasetMemoryManager, executor, resultState);
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionReader.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionReader.java
index 296c502..a584b4b 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionReader.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionReader.java
@@ -3,9 +3,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * you may obtain a copy of the License from
- * 
+ *
  *     http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -69,6 +69,9 @@
             int localPageIndex = (int) (localPageOffset / datasetMemoryManager.getPageSize());
             int pageOffset = (int) (localPageOffset % datasetMemoryManager.getPageSize());
             Page page = resultState.getPage(localPageIndex);
+            if (page == null) {
+            	return readSize;
+            }
             readSize += buffer.remaining();
             buffer.put(page.getBuffer().array(), pageOffset, buffer.remaining());
         }
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionWriter.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionWriter.java
index f6ae540..317f553 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionWriter.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionWriter.java
@@ -77,7 +77,7 @@
         FileReference fRef = manager.getFileFactory().createUnmanagedWorkspaceFile(fName);
         fileHandle = resultState.getIOManager().open(fRef, IIOManager.FileReadWriteMode.READ_WRITE,
                 IIOManager.FileSyncMode.METADATA_ASYNC_DATA_ASYNC);
-        resultState.init(fRef);
+        resultState.init(fRef, fileHandle);
     }
 
     @Override
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/ResultState.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/ResultState.java
index 3db3fd9..661df93 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/ResultState.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/ResultState.java
@@ -24,6 +24,7 @@
 import edu.uci.ics.hyracks.api.dataflow.state.IStateObject;
 import edu.uci.ics.hyracks.api.dataset.Page;
 import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IFileHandle;
 import edu.uci.ics.hyracks.api.io.IIOManager;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.partitions.ResultSetPartitionId;
@@ -43,6 +44,8 @@
 
     private FileReference fileRef;
 
+    private IFileHandle writeFileHandle;
+
     private long size;
 
     private long persistentSize;
@@ -56,14 +59,26 @@
         localPageList = new ArrayList<Page>();
     }
 
-    public synchronized void init(FileReference fileRef) {
+    public synchronized void init(FileReference fileRef, IFileHandle writeFileHandle) {
         this.fileRef = fileRef;
+        this.writeFileHandle = writeFileHandle;
 
         size = 0;
         persistentSize = 0;
         notifyAll();
     }
 
+    public synchronized void deinit() {
+        if (writeFileHandle != null) {
+            try {
+                ioManager.close(writeFileHandle);
+            } catch (IOException e) {
+                // Since file handle could not be closed, just ignore.
+            }
+        }
+        fileRef.delete();
+    }
+
     public ResultSetPartitionId getResultSetPartitionId() {
         return resultSetPartitionId;
     }
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/ApplicationMessageWork.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/ApplicationMessageWork.java
index deb1b75..19a5a81 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/ApplicationMessageWork.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/ApplicationMessageWork.java
@@ -14,49 +14,46 @@
  */
 package edu.uci.ics.hyracks.control.nc.work;
 
-import java.io.IOException;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.messages.IMessage;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentUtils;
 import edu.uci.ics.hyracks.control.common.work.AbstractWork;
 import edu.uci.ics.hyracks.control.nc.NodeControllerService;
 import edu.uci.ics.hyracks.control.nc.application.NCApplicationContext;
 
 /**
  * @author rico
- * 
  */
 public class ApplicationMessageWork extends AbstractWork {
-
     private static final Logger LOGGER = Logger.getLogger(ApplicationMessageWork.class.getName());
     private byte[] message;
+    private DeploymentId deploymentId;
     private String nodeId;
     private NodeControllerService ncs;
-    private String appName;
 
-    public ApplicationMessageWork(NodeControllerService ncs, byte[] message, String appName, String nodeId) {
+    public ApplicationMessageWork(NodeControllerService ncs, byte[] message, DeploymentId deploymentId, String nodeId) {
         this.ncs = ncs;
+        this.deploymentId = deploymentId;
         this.nodeId = nodeId;
         this.message = message;
-        this.appName = appName;
     }
 
     @Override
     public void run() {
-
-        NCApplicationContext ctx = ncs.getApplications().get(appName);
+        NCApplicationContext ctx = ncs.getApplicationContext();
         try {
-            IMessage data = (IMessage) ctx.deserialize(message);
+            IMessage data = (IMessage) DeploymentUtils.deserialize(message, deploymentId, ctx);;
             if (ctx.getMessageBroker() != null) {
                 ctx.getMessageBroker().receivedMessage(data, nodeId);
             } else {
                 LOGGER.log(Level.WARNING, "Messsage was sent, but no Message Broker set!");
             }
-        } catch (IOException e) {
+        } catch (Exception e) {
             Logger.getLogger(this.getClass().getName()).log(Level.WARNING, "Error in application message delivery!", e);
-        } catch (ClassNotFoundException e) {
-            Logger.getLogger(this.getClass().getName()).log(Level.WARNING, "Error in application message delivery!", e);
+            throw new RuntimeException(e);
         }
     }
 
@@ -64,5 +61,4 @@
     public String toString() {
         return "nodeID: " + nodeId;
     }
-
-}
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/CreateApplicationWork.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/CreateApplicationWork.java
deleted file mode 100644
index 6eb1a95..0000000
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/CreateApplicationWork.java
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.control.nc.work;
-
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.io.Serializable;
-import java.util.Map;
-
-import org.apache.commons.io.IOUtils;
-import org.apache.http.HttpResponse;
-import org.apache.http.client.HttpClient;
-import org.apache.http.client.methods.HttpGet;
-import org.apache.http.impl.client.DefaultHttpClient;
-
-import edu.uci.ics.hyracks.api.exceptions.HyracksException;
-import edu.uci.ics.hyracks.control.common.application.ApplicationStatus;
-import edu.uci.ics.hyracks.control.common.controllers.NCConfig;
-import edu.uci.ics.hyracks.control.common.controllers.NodeParameters;
-import edu.uci.ics.hyracks.control.common.work.AbstractWork;
-import edu.uci.ics.hyracks.control.nc.NodeControllerService;
-import edu.uci.ics.hyracks.control.nc.application.NCApplicationContext;
-
-public class CreateApplicationWork extends AbstractWork {
-    private final NodeControllerService ncs;
-
-    private final String appName;
-
-    private final boolean deployHar;
-
-    private final byte[] serializedDistributedState;
-
-    public CreateApplicationWork(NodeControllerService ncs, String appName, boolean deployHar,
-            byte[] serializedDistributedState) {
-        this.ncs = ncs;
-        this.appName = appName;
-        this.deployHar = deployHar;
-        this.serializedDistributedState = serializedDistributedState;
-    }
-
-    @Override
-    public void run() {
-        try {
-            NCApplicationContext appCtx;
-            Map<String, NCApplicationContext> applications = ncs.getApplications();
-            if (applications.containsKey(appName)) {
-                throw new HyracksException("Duplicate application with name: " + appName + " being created.");
-            }
-            appCtx = new NCApplicationContext(ncs.getServerContext(), ncs.getRootContext(), appName, ncs.getId());
-            applications.put(appName, appCtx);
-            if (deployHar) {
-                NCConfig ncConfig = ncs.getConfiguration();
-                NodeParameters nodeParameters = ncs.getNodeParameters();
-                HttpClient hc = new DefaultHttpClient();
-                HttpGet get = new HttpGet("http://" + ncConfig.ccHost + ":"
-                        + nodeParameters.getClusterControllerInfo().getWebPort() + "/applications/" + appName);
-                HttpResponse response = hc.execute(get);
-                InputStream is = response.getEntity().getContent();
-                OutputStream os = appCtx.getHarOutputStream();
-                try {
-                    IOUtils.copyLarge(is, os);
-                } finally {
-                    os.close();
-                    is.close();
-                }
-            }
-            appCtx.initializeClassPath();
-            appCtx.setDistributedState((Serializable) appCtx.deserialize(serializedDistributedState));
-            appCtx.initialize();
-            ncs.getClusterController()
-                    .notifyApplicationStateChange(ncs.getId(), appName, ApplicationStatus.INITIALIZED);
-        } catch (Exception e) {
-            throw new RuntimeException(e);
-        }
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/DeployBinaryWork.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/DeployBinaryWork.java
new file mode 100644
index 0000000..4f613a1
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/DeployBinaryWork.java
@@ -0,0 +1,37 @@
+package edu.uci.ics.hyracks.control.nc.work;
+
+import java.net.URL;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
+import edu.uci.ics.hyracks.control.common.base.IClusterController;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentStatus;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentUtils;
+import edu.uci.ics.hyracks.control.common.work.AbstractWork;
+import edu.uci.ics.hyracks.control.nc.NodeControllerService;
+
+public class DeployBinaryWork extends AbstractWork {
+
+    private DeploymentId deploymentId;
+    private NodeControllerService ncs;
+    private List<URL> binaryURLs;
+
+    public DeployBinaryWork(NodeControllerService ncs, DeploymentId deploymentId, List<URL> binaryURLs) {
+        this.deploymentId = deploymentId;
+        this.ncs = ncs;
+        this.binaryURLs = binaryURLs;
+    }
+
+    @Override
+    public void run() {
+        try {
+            DeploymentUtils.deploy(deploymentId, binaryURLs, ncs.getApplicationContext()
+                    .getJobSerializerDeserializerContainer(), ncs.getServerContext(), true);
+            IClusterController ccs = ncs.getClusterController();
+            ccs.notifyDeployBinary(deploymentId, ncs.getId(), DeploymentStatus.SUCCEED);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+}
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/DestroyApplicationWork.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/DestroyApplicationWork.java
deleted file mode 100644
index b104ce8..0000000
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/DestroyApplicationWork.java
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.control.nc.work;
-
-import java.util.Map;
-
-import edu.uci.ics.hyracks.control.common.application.ApplicationContext;
-import edu.uci.ics.hyracks.control.common.application.ApplicationStatus;
-import edu.uci.ics.hyracks.control.common.work.AbstractWork;
-import edu.uci.ics.hyracks.control.nc.NodeControllerService;
-import edu.uci.ics.hyracks.control.nc.application.NCApplicationContext;
-
-public class DestroyApplicationWork extends AbstractWork {
-    private final NodeControllerService ncs;
-
-    private final String appName;
-
-    public DestroyApplicationWork(NodeControllerService ncs, String appName) {
-        this.ncs = ncs;
-        this.appName = appName;
-    }
-
-    @Override
-    public void run() {
-        try {
-            Map<String, NCApplicationContext> applications = ncs.getApplications();
-            ApplicationContext appCtx = applications.remove(appName);
-            if (appCtx != null) {
-                appCtx.deinitialize();
-            }
-            ncs.getClusterController().notifyApplicationStateChange(ncs.getId(), appName,
-                    ApplicationStatus.DEINITIALIZED);
-        } catch (Exception e) {
-            throw new RuntimeException(e);
-        }
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/StartTasksWork.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/StartTasksWork.java
index 0c0fa3d..2c6d38e 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/StartTasksWork.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/StartTasksWork.java
@@ -36,12 +36,14 @@
 import edu.uci.ics.hyracks.api.dataflow.connectors.IConnectorPolicy;
 import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.job.ActivityCluster;
 import edu.uci.ics.hyracks.api.job.ActivityClusterGraph;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.partitions.PartitionId;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentUtils;
 import edu.uci.ics.hyracks.control.common.job.TaskAttemptDescriptor;
 import edu.uci.ics.hyracks.control.common.work.AbstractWork;
 import edu.uci.ics.hyracks.control.nc.Joblet;
@@ -59,7 +61,7 @@
 
     private final NodeControllerService ncs;
 
-    private final String appName;
+    private final DeploymentId deploymentId;
 
     private final JobId jobId;
 
@@ -71,11 +73,11 @@
 
     private final EnumSet<JobFlag> flags;
 
-    public StartTasksWork(NodeControllerService ncs, String appName, JobId jobId, byte[] acgBytes,
+    public StartTasksWork(NodeControllerService ncs, DeploymentId deploymentId, JobId jobId, byte[] acgBytes,
             List<TaskAttemptDescriptor> taskDescriptors,
             Map<ConnectorDescriptorId, IConnectorPolicy> connectorPoliciesMap, EnumSet<JobFlag> flags) {
         this.ncs = ncs;
-        this.appName = appName;
+        this.deploymentId = deploymentId;
         this.jobId = jobId;
         this.acgBytes = acgBytes;
         this.taskDescriptors = taskDescriptors;
@@ -86,10 +88,9 @@
     @Override
     public void run() {
         try {
-            Map<String, NCApplicationContext> applications = ncs.getApplications();
-            NCApplicationContext appCtx = applications.get(appName);
-            final Joblet joblet = getOrCreateLocalJoblet(jobId, appCtx, acgBytes == null ? null
-                    : (ActivityClusterGraph) appCtx.deserialize(acgBytes));
+            NCApplicationContext appCtx = ncs.getApplicationContext();
+            final Joblet joblet = getOrCreateLocalJoblet(deploymentId, jobId, appCtx, acgBytes == null ? null
+                    : (ActivityClusterGraph) DeploymentUtils.deserialize(acgBytes, deploymentId, appCtx));
             final ActivityClusterGraph acg = joblet.getActivityClusterGraph();
 
             IRecordDescriptorProvider rdp = new IRecordDescriptorProvider() {
@@ -167,15 +168,15 @@
         }
     }
 
-    private Joblet getOrCreateLocalJoblet(JobId jobId, INCApplicationContext appCtx, ActivityClusterGraph acg)
-            throws Exception {
+    private Joblet getOrCreateLocalJoblet(DeploymentId deploymentId, JobId jobId, INCApplicationContext appCtx,
+            ActivityClusterGraph acg) throws Exception {
         Map<JobId, Joblet> jobletMap = ncs.getJobletMap();
         Joblet ji = jobletMap.get(jobId);
         if (ji == null) {
             if (acg == null) {
                 throw new NullPointerException("JobActivityGraph was null");
             }
-            ji = new Joblet(ncs, jobId, appCtx, acg);
+            ji = new Joblet(ncs, deploymentId, jobId, appCtx, acg);
             jobletMap.put(jobId, ji);
         }
         return ji;
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/UnDeployBinaryWork.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/UnDeployBinaryWork.java
new file mode 100644
index 0000000..bd77fb5
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/UnDeployBinaryWork.java
@@ -0,0 +1,32 @@
+package edu.uci.ics.hyracks.control.nc.work;
+
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
+import edu.uci.ics.hyracks.control.common.base.IClusterController;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentStatus;
+import edu.uci.ics.hyracks.control.common.deployment.DeploymentUtils;
+import edu.uci.ics.hyracks.control.common.work.AbstractWork;
+import edu.uci.ics.hyracks.control.nc.NodeControllerService;
+
+public class UnDeployBinaryWork extends AbstractWork {
+
+    private DeploymentId deploymentId;
+    private NodeControllerService ncs;
+
+    public UnDeployBinaryWork(NodeControllerService ncs, DeploymentId deploymentId) {
+        this.deploymentId = deploymentId;
+        this.ncs = ncs;
+    }
+
+    @Override
+    public void run() {
+        try {
+            DeploymentUtils.undeploy(deploymentId, ncs.getApplicationContext().getJobSerializerDeserializerContainer(),
+                    ncs.getServerContext());
+            IClusterController ccs = ncs.getClusterController();
+            ccs.notifyDeployBinary(deploymentId, ncs.getId(), DeploymentStatus.SUCCEED);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+}
diff --git a/hyracks/hyracks-control/pom.xml b/hyracks/hyracks-control/pom.xml
index e1ab98d..5696ffe 100644
--- a/hyracks/hyracks-control/pom.xml
+++ b/hyracks/hyracks-control/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-data/hyracks-data-std/pom.xml b/hyracks/hyracks-data/hyracks-data-std/pom.xml
index fe53083..9152d0d 100644
--- a/hyracks/hyracks-data/hyracks-data-std/pom.xml
+++ b/hyracks/hyracks-data/hyracks-data-std/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-data</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,7 +27,7 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-api</artifactId>
-  	<version>0.2.4-SNAPSHOT</version>
+  	<version>0.2.5-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/hyracks/hyracks-data/hyracks-data-std/src/main/java/edu/uci/ics/hyracks/data/std/accessors/MurmurHash3BinaryHashFunctionFamily.java b/hyracks/hyracks-data/hyracks-data-std/src/main/java/edu/uci/ics/hyracks/data/std/accessors/MurmurHash3BinaryHashFunctionFamily.java
new file mode 100644
index 0000000..8f2e32c
--- /dev/null
+++ b/hyracks/hyracks-data/hyracks-data-std/src/main/java/edu/uci/ics/hyracks/data/std/accessors/MurmurHash3BinaryHashFunctionFamily.java
@@ -0,0 +1,61 @@
+package edu.uci.ics.hyracks.data.std.accessors;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunction;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFamily;
+
+public class MurmurHash3BinaryHashFunctionFamily implements IBinaryHashFunctionFamily {
+    private static final long serialVersionUID = 1L;
+
+    private static final int C1 = 0xcc9e2d51;
+    private static final int C2 = 0x1b873593;
+    private static final int C3 = 5;
+    private static final int C4 = 0xe6546b64;
+    private static final int C5 = 0x85ebca6b;
+    private static final int C6 = 0xc2b2ae35;
+
+    @Override
+    public IBinaryHashFunction createBinaryHashFunction(final int seed) {
+        return new IBinaryHashFunction() {
+            @Override
+            public int hash(byte[] bytes, int offset, int length) {
+                int h = seed;
+                int p = offset;
+                int remain = length;
+                while (remain > 4) {
+                    int k = ((int) bytes[p]) | (((int) bytes[p + 1]) << 8) | (((int) bytes[p + 2]) << 16)
+                            | (((int) bytes[p + 3]) << 24);
+                    k *= C1;
+                    k = Integer.rotateLeft(k, 15);
+                    k *= C2;
+                    h ^= k;
+                    h = Integer.rotateLeft(h, 13);
+                    h = h * C3 + C4;
+                    p += 4;
+                    remain -= 4;
+                }
+                int k = 0;
+                switch (remain) {
+                    case 3:
+                        k = bytes[p++];
+                    case 2:
+                        k = (k << 8) | bytes[p++];
+                    case 1:
+                        k = (k << 8) | bytes[p++];
+                        k *= C1;
+                        k = Integer.rotateLeft(k, 15);
+                        k *= C2;
+                        h ^= k;
+                        h = Integer.rotateLeft(h, 13);
+                        h = h * C3 + C4;
+                }
+                h ^= length;
+                h ^= (h >>> 16);
+                h *= C5;
+                h ^= (h >>> 13);
+                h *= C6;
+                h ^= (h >>> 16);
+                return h;
+            }
+        };
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-data/hyracks-data-std/src/main/java/edu/uci/ics/hyracks/data/std/primitive/DoublePointable.java b/hyracks/hyracks-data/hyracks-data-std/src/main/java/edu/uci/ics/hyracks/data/std/primitive/DoublePointable.java
index 5267086..543031d 100644
--- a/hyracks/hyracks-data/hyracks-data-std/src/main/java/edu/uci/ics/hyracks/data/std/primitive/DoublePointable.java
+++ b/hyracks/hyracks-data/hyracks-data-std/src/main/java/edu/uci/ics/hyracks/data/std/primitive/DoublePointable.java
@@ -23,6 +23,17 @@
 import edu.uci.ics.hyracks.data.std.api.IPointableFactory;
 
 public final class DoublePointable extends AbstractPointable implements IHashable, IComparable, INumeric {
+	private final static double machineEpsilon;
+	static {
+		float epsilon = 1.0f;
+
+        do {
+           epsilon /= 2.0f;
+        }
+        while ((float)(1.0 + (epsilon/2.0)) != 1.0);
+        machineEpsilon = epsilon;
+	}
+	
     public static final ITypeTraits TYPE_TRAITS = new ITypeTraits() {
         private static final long serialVersionUID = 1L;
 
@@ -134,4 +145,8 @@
     public double doubleValue() {
         return getDouble();
     }
+
+	public static double getEpsilon() {
+		return machineEpsilon;
+	}
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-data/pom.xml b/hyracks/hyracks-data/pom.xml
index 45460ca..2af86c9 100644
--- a/hyracks/hyracks-data/pom.xml
+++ b/hyracks/hyracks-data/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-dataflow-common/pom.xml b/hyracks/hyracks-dataflow-common/pom.xml
index c66d10e..4afb088 100644
--- a/hyracks/hyracks-dataflow-common/pom.xml
+++ b/hyracks/hyracks-dataflow-common/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -26,14 +26,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-data-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   	</dependency>
   </dependencies>
 </project>
diff --git a/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/ShortSerializerDeserializer.java b/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/ShortSerializerDeserializer.java
new file mode 100644
index 0000000..15384b3
--- /dev/null
+++ b/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/ShortSerializerDeserializer.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.dataflow.common.data.marshalling;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public class ShortSerializerDeserializer implements ISerializerDeserializer<Short> {
+    private static final long serialVersionUID = 1L;
+
+    public static final ShortSerializerDeserializer INSTANCE = new ShortSerializerDeserializer();
+
+    private ShortSerializerDeserializer() {
+    }
+
+    @Override
+    public Short deserialize(DataInput in) throws HyracksDataException {
+        try {
+            return in.readShort();
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public void serialize(Short instance, DataOutput out) throws HyracksDataException {
+        try {
+            out.writeShort(instance.intValue());
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    public static short getShort(byte[] bytes, int offset) {
+        return (short) (((bytes[offset] & 0xff) << 8) + ((bytes[offset + 1] & 0xff)));
+    }
+
+    public static void putShort(int val, byte[] bytes, int offset) {
+        bytes[offset] = (byte) ((val >>> 8) & 0xFF);
+        bytes[offset + 1] = (byte) ((val >>> 0) & 0xFF);
+    }
+}
diff --git a/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/util/SerdeUtils.java b/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/util/SerdeUtils.java
index 00575f4..9dafa83 100644
--- a/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/util/SerdeUtils.java
+++ b/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/util/SerdeUtils.java
@@ -25,43 +25,45 @@
 import edu.uci.ics.hyracks.data.std.primitive.FloatPointable;
 import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
 import edu.uci.ics.hyracks.data.std.primitive.LongPointable;
+import edu.uci.ics.hyracks.data.std.primitive.ShortPointable;
 import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.BooleanSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.FloatSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.Integer64SerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.ShortSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
 
 @SuppressWarnings("rawtypes")
 public class SerdeUtils {
-	public static class PayloadTypeTraits implements ITypeTraits {
-		private static final long serialVersionUID = 1L;
-		final int payloadSize;
-		
-		public PayloadTypeTraits(int payloadSize) {
-			this.payloadSize = payloadSize;
-		}
-		
-		@Override
-		public boolean isFixedLength() {
-			return true;
-		}
+    public static class PayloadTypeTraits implements ITypeTraits {
+        private static final long serialVersionUID = 1L;
+        final int payloadSize;
 
-		@Override
-		public int getFixedLength() {
-			return payloadSize;
-		}
-	}
-	
-	public static ITypeTraits[] serdesToTypeTraits(ISerializerDeserializer[] serdes) {
+        public PayloadTypeTraits(int payloadSize) {
+            this.payloadSize = payloadSize;
+        }
+
+        @Override
+        public boolean isFixedLength() {
+            return true;
+        }
+
+        @Override
+        public int getFixedLength() {
+            return payloadSize;
+        }
+    }
+
+    public static ITypeTraits[] serdesToTypeTraits(ISerializerDeserializer[] serdes) {
         ITypeTraits[] typeTraits = new ITypeTraits[serdes.length];
         for (int i = 0; i < serdes.length; i++) {
             typeTraits[i] = serdeToTypeTrait(serdes[i]);
         }
         return typeTraits;
     }
-    
+
     public static ITypeTraits[] serdesToTypeTraits(ISerializerDeserializer[] serdes, int payloadSize) {
         ITypeTraits[] typeTraits = new ITypeTraits[serdes.length + 1];
         for (int i = 0; i < serdes.length; i++) {
@@ -72,6 +74,9 @@
     }
 
     public static ITypeTraits serdeToTypeTrait(ISerializerDeserializer serde) {
+        if (serde instanceof ShortSerializerDeserializer) {
+            return ShortPointable.TYPE_TRAITS;
+        }
         if (serde instanceof IntegerSerializerDeserializer) {
             return IntegerPointable.TYPE_TRAITS;
         }
@@ -112,6 +117,9 @@
     }
 
     public static IBinaryComparatorFactory serdeToComparatorFactory(ISerializerDeserializer serde) {
+        if (serde instanceof ShortSerializerDeserializer) {
+            return PointableBinaryComparatorFactory.of(ShortPointable.FACTORY);
+        }
         if (serde instanceof IntegerSerializerDeserializer) {
             return PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
         }
diff --git a/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/util/TupleUtils.java b/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/util/TupleUtils.java
index b35dd75..02047e8 100644
--- a/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/util/TupleUtils.java
+++ b/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/util/TupleUtils.java
@@ -126,4 +126,11 @@
         tupleCopy.reset(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray());
         return tupleCopy;
     }
+    
+    public static void copyTuple(ArrayTupleBuilder tupleBuilder, ITupleReference tuple, int numFields) throws HyracksDataException {
+        tupleBuilder.reset();
+        for (int i = 0; i < numFields; i++) {
+            tupleBuilder.addField(tuple.getFieldData(i), tuple.getFieldStart(i), tuple.getFieldLength(i));
+        }
+    }
 }
diff --git a/hyracks/hyracks-dataflow-hadoop/pom.xml b/hyracks/hyracks-dataflow-hadoop/pom.xml
index 18bcba7..3947387 100644
--- a/hyracks/hyracks-dataflow-hadoop/pom.xml
+++ b/hyracks/hyracks-dataflow-hadoop/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -26,14 +26,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
@@ -53,7 +53,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   </dependencies>
diff --git a/hyracks/hyracks-dataflow-std/pom.xml b/hyracks/hyracks-dataflow-std/pom.xml
index bd4a837..db4f452 100644
--- a/hyracks/hyracks-dataflow-std/pom.xml
+++ b/hyracks/hyracks-dataflow-std/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,14 +27,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/InMemoryHashJoin.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/InMemoryHashJoin.java
index d86f1d5..e1fda74 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/InMemoryHashJoin.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/InMemoryHashJoin.java
@@ -32,7 +32,7 @@
 import edu.uci.ics.hyracks.dataflow.std.structures.TuplePointer;
 
 public class InMemoryHashJoin {
-	
+
     private final List<ByteBuffer> buffers;
     private final FrameTupleAccessor accessorBuild;
     private final ITuplePartitionComputer tpcBuild;
@@ -44,24 +44,25 @@
     private final boolean isLeftOuter;
     private final ArrayTupleBuilder nullTupleBuild;
     private final ISerializableTable table;
-	private final int tableSize;
+    private final int tableSize;
     private final TuplePointer storedTuplePointer;
-    private final boolean reverseOutputOrder;	//Should we reverse the order of tuples, we are writing in output
-    
+    private final boolean reverseOutputOrder; //Should we reverse the order of tuples, we are writing in output
+
     public InMemoryHashJoin(IHyracksTaskContext ctx, int tableSize, FrameTupleAccessor accessor0,
             ITuplePartitionComputer tpc0, FrameTupleAccessor accessor1, ITuplePartitionComputer tpc1,
-            FrameTuplePairComparator comparator, boolean isLeftOuter, INullWriter[] nullWriters1, ISerializableTable table)
-            throws HyracksDataException {
-    	this(ctx, tableSize, accessor0, tpc0, accessor1, tpc1, comparator, isLeftOuter, nullWriters1, table, false);
+            FrameTuplePairComparator comparator, boolean isLeftOuter, INullWriter[] nullWriters1,
+            ISerializableTable table) throws HyracksDataException {
+        this(ctx, tableSize, accessor0, tpc0, accessor1, tpc1, comparator, isLeftOuter, nullWriters1, table, false);
     }
-    
+
     public InMemoryHashJoin(IHyracksTaskContext ctx, int tableSize, FrameTupleAccessor accessor0,
             ITuplePartitionComputer tpc0, FrameTupleAccessor accessor1, ITuplePartitionComputer tpc1,
-            FrameTuplePairComparator comparator, boolean isLeftOuter, INullWriter[] nullWriters1, ISerializableTable table, boolean reverse) throws HyracksDataException {
-    	this.tableSize = tableSize;
-       	this.table = table;
-       	storedTuplePointer = new TuplePointer();
-       	buffers = new ArrayList<ByteBuffer>();
+            FrameTuplePairComparator comparator, boolean isLeftOuter, INullWriter[] nullWriters1,
+            ISerializableTable table, boolean reverse) throws HyracksDataException {
+        this.tableSize = tableSize;
+        this.table = table;
+        storedTuplePointer = new TuplePointer();
+        buffers = new ArrayList<ByteBuffer>();
         this.accessorBuild = accessor1;
         this.tpcBuild = tpc1;
         this.accessorProbe = accessor0;
@@ -82,7 +83,7 @@
         } else {
             nullTupleBuild = null;
         }
-    	reverseOutputOrder = reverse;
+        reverseOutputOrder = reverse;
     }
 
     public void build(ByteBuffer buffer) throws HyracksDataException {
@@ -120,8 +121,8 @@
             } while (true);
 
             if (!matchFound && isLeftOuter) {
-                
-            	if (!appender.appendConcat(accessorProbe, i, nullTupleBuild.getFieldEndOffsets(),
+
+                if (!appender.appendConcat(accessorProbe, i, nullTupleBuild.getFieldEndOffsets(),
                         nullTupleBuild.getByteArray(), 0, nullTupleBuild.getSize())) {
                     flushFrame(outBuffer, writer);
                     appender.reset(outBuffer, true);
@@ -130,7 +131,7 @@
                         throw new IllegalStateException();
                     }
                 }
-                
+
             }
         }
     }
@@ -148,25 +149,24 @@
         buffer.position(0);
         buffer.limit(buffer.capacity());
     }
-    
-    private void appendToResult(int probeSidetIx, int buildSidetIx, IFrameWriter writer) throws HyracksDataException{
-    	if(!reverseOutputOrder){
-    		if (!appender.appendConcat(accessorProbe, probeSidetIx, accessorBuild, buildSidetIx)) {
+
+    private void appendToResult(int probeSidetIx, int buildSidetIx, IFrameWriter writer) throws HyracksDataException {
+        if (!reverseOutputOrder) {
+            if (!appender.appendConcat(accessorProbe, probeSidetIx, accessorBuild, buildSidetIx)) {
                 flushFrame(outBuffer, writer);
                 appender.reset(outBuffer, true);
                 if (!appender.appendConcat(accessorProbe, probeSidetIx, accessorBuild, buildSidetIx)) {
                     throw new IllegalStateException();
                 }
             }
-    	}
-    	else{
-    		if (!appender.appendConcat(accessorBuild, buildSidetIx, accessorProbe, probeSidetIx)) {
+        } else {
+            if (!appender.appendConcat(accessorBuild, buildSidetIx, accessorProbe, probeSidetIx)) {
                 flushFrame(outBuffer, writer);
                 appender.reset(outBuffer, true);
                 if (!appender.appendConcat(accessorBuild, buildSidetIx, accessorProbe, probeSidetIx)) {
                     throw new IllegalStateException();
                 }
             }
-    	}
+        }
     }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/OptimizedHybridHashJoin.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/OptimizedHybridHashJoin.java
index 6e2b16a..c81bf54 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/OptimizedHybridHashJoin.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/OptimizedHybridHashJoin.java
@@ -529,7 +529,7 @@
     private void probeWrite(int pid, ByteBuffer buff) throws HyracksDataException {
         RunFileWriter pWriter = probeRFWriters[pid];
         if (pWriter == null) {
-            FileReference file = ctx.createManagedWorkspaceFile(rel1Name);
+            FileReference file = ctx.getJobletContext().createManagedWorkspaceFile(rel1Name);
             pWriter = new RunFileWriter(file, ctx.getIOManager());
             pWriter.open();
             probeRFWriters[pid] = pWriter;
@@ -621,4 +621,4 @@
     public boolean isTableEmpty(){
     	return this.isTableEmpty;
     }
-}
\ No newline at end of file
+}
diff --git a/hyracks/hyracks-dist/pom.xml b/hyracks/hyracks-dist/pom.xml
index e79eba7..d600fd8 100755
--- a/hyracks/hyracks-dist/pom.xml
+++ b/hyracks/hyracks-dist/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<artifactId>hyracks</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 	<artifactId>hyracks-dist</artifactId>
diff --git a/hyracks/hyracks-documentation/pom.xml b/hyracks/hyracks-documentation/pom.xml
index b5e42ad..6473cc8 100644
--- a/hyracks/hyracks-documentation/pom.xml
+++ b/hyracks/hyracks-documentation/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
diff --git a/hyracks/hyracks-examples/btree-example/btreeapp/pom.xml b/hyracks/hyracks-examples/btree-example/btreeapp/pom.xml
deleted file mode 100644
index f392b34..0000000
--- a/hyracks/hyracks-examples/btree-example/btreeapp/pom.xml
+++ /dev/null
@@ -1,87 +0,0 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks.examples.btree</groupId>
-  <artifactId>btreeapp</artifactId>
-  <name>btreeapp</name>
-
-  <parent>
-    <groupId>edu.uci.ics.hyracks.examples</groupId>
-    <artifactId>btree-example</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
-  </parent>
-
-  <build>
-    <pluginManagement>
-      <plugins>
-        <plugin>
-          <groupId>org.eclipse.m2e</groupId>
-          <artifactId>lifecycle-mapping</artifactId>
-          <version>1.0.0</version>
-          <configuration>
-            <lifecycleMappingMetadata>
-              <pluginExecutions>
-                <pluginExecution>
-                  <pluginExecutionFilter>
-                    <groupId>org.apache.maven.plugins</groupId>
-                    <artifactId>maven-dependency-plugin</artifactId>
-                    <versionRange>[1.0.0,)</versionRange>
-                    <goals>
-                      <goal>copy-dependencies</goal>
-                    </goals>
-                  </pluginExecutionFilter>
-                  <action>
-                    <ignore />
-                  </action>
-                </pluginExecution>
-              </pluginExecutions>
-            </lifecycleMappingMetadata>
-          </configuration>
-        </plugin>
-      </plugins>
-	</pluginManagement>
-  
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-dependency-plugin</artifactId>
-        <executions>
-          <execution>
-            <id>copy-dependencies</id>
-            <phase>package</phase>
-            <goals>
-              <goal>copy-dependencies</goal>
-            </goals>
-            <configuration>
-              <outputDirectory>target/application/lib</outputDirectory>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
-      <plugin>
-        <artifactId>maven-assembly-plugin</artifactId>
-        <version>2.2-beta-5</version>
-        <executions>
-          <execution>
-            <configuration>
-              <descriptors>
-                <descriptor>src/main/assembly/app-assembly.xml</descriptor>
-              </descriptors>
-            </configuration>
-            <phase>package</phase>
-            <goals>
-              <goal>attached</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
-    </plugins>
-  </build>
-  <dependencies>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks.examples.btree</groupId>
-  		<artifactId>btreehelper</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<scope>compile</scope>
-  	</dependency>
-  </dependencies>
-</project>
diff --git a/hyracks/hyracks-examples/btree-example/btreeapp/src/main/assembly/app-assembly.xml b/hyracks/hyracks-examples/btree-example/btreeapp/src/main/assembly/app-assembly.xml
deleted file mode 100644
index 43ace6c..0000000
--- a/hyracks/hyracks-examples/btree-example/btreeapp/src/main/assembly/app-assembly.xml
+++ /dev/null
@@ -1,13 +0,0 @@
-<assembly>
-  <id>app-assembly</id>
-  <formats>
-    <format>zip</format>
-  </formats>
-  <includeBaseDirectory>false</includeBaseDirectory>
-  <fileSets>
-    <fileSet>
-      <directory>target/application/lib</directory>
-      <outputDirectory>lib</outputDirectory>
-    </fileSet>
-  </fileSets>
-</assembly>
diff --git a/hyracks/hyracks-examples/btree-example/btreeclient/pom.xml b/hyracks/hyracks-examples/btree-example/btreeclient/pom.xml
index 64e30f9..f7698be 100644
--- a/hyracks/hyracks-examples/btree-example/btreeclient/pom.xml
+++ b/hyracks/hyracks-examples/btree-example/btreeclient/pom.xml
@@ -6,26 +6,26 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>btree-example</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks.examples.btree</groupId>
   		<artifactId>btreehelper</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/InsertPipelineExample.java b/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/InsertPipelineExample.java
index b6e8c72..a939a04 100644
--- a/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/InsertPipelineExample.java
+++ b/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/InsertPipelineExample.java
@@ -41,15 +41,14 @@
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.dataflow.std.misc.NullSinkOperatorDescriptor;
 import edu.uci.ics.hyracks.examples.btree.helper.DataGenOperatorDescriptor;
-import edu.uci.ics.hyracks.examples.btree.helper.IndexRegistryProvider;
+import edu.uci.ics.hyracks.examples.btree.helper.IndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.examples.btree.helper.StorageManagerInterface;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexInsertUpdateDeleteOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOp;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
 // This example will insert tuples into the primary and secondary index using an insert pipeline
@@ -62,9 +61,6 @@
         @Option(name = "-port", usage = "Hyracks Cluster Controller Port (default: 1098)")
         public int port = 1098;
 
-        @Option(name = "-app", usage = "Hyracks Application name", required = true)
-        public String app;
-
         @Option(name = "-target-ncs", usage = "Comma separated list of node-controller names to use", required = true)
         public String ncs;
 
@@ -88,7 +84,7 @@
         JobSpecification job = createJob(options);
 
         long start = System.currentTimeMillis();
-        JobId jobId = hcc.startJob(options.app, job);
+        JobId jobId = hcc.startJob(job);
         hcc.waitForCompletion(jobId);
         long end = System.currentTimeMillis();
         System.err.println(start + " " + end + " " + (end - start));
@@ -124,7 +120,7 @@
         // run data generator on first nodecontroller given
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, dataGen, splitNCs[0]);
 
-        IIndexRegistryProvider<IIndex> indexRegistryProvider = IndexRegistryProvider.INSTANCE;
+        IIndexLifecycleManagerProvider lcManagerProvider = IndexLifecycleManagerProvider.INSTANCE;
         IStorageManagerInterface storageManager = StorageManagerInterface.INSTANCE;
 
         // prepare insertion into primary index
@@ -151,9 +147,9 @@
 
         // create operator descriptor
         TreeIndexInsertUpdateDeleteOperatorDescriptor primaryInsert = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, recDesc, storageManager, indexRegistryProvider, primarySplitProvider, primaryTypeTraits,
-                primaryComparatorFactories, primaryFieldPermutation, IndexOp.INSERT, dataflowHelperFactory, null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, recDesc, storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, null, primaryFieldPermutation, IndexOperation.INSERT,
+                dataflowHelperFactory, null, NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, primaryInsert, splitNCs);
 
         // prepare insertion into secondary index
@@ -175,9 +171,9 @@
                 options.secondaryBTreeName);
         // create operator descriptor
         TreeIndexInsertUpdateDeleteOperatorDescriptor secondaryInsert = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, recDesc, storageManager, indexRegistryProvider, secondarySplitProvider, secondaryTypeTraits,
-                secondaryComparatorFactories, secondaryFieldPermutation, IndexOp.INSERT, dataflowHelperFactory, null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, recDesc, storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, null, secondaryFieldPermutation, IndexOperation.INSERT,
+                dataflowHelperFactory, null, NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, secondaryInsert, splitNCs);
 
         // end the insert pipeline at this sink operator
diff --git a/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexBulkLoadExample.java b/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexBulkLoadExample.java
index a6c7ea6..616fdae 100644
--- a/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexBulkLoadExample.java
+++ b/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexBulkLoadExample.java
@@ -40,14 +40,13 @@
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
 import edu.uci.ics.hyracks.examples.btree.helper.DataGenOperatorDescriptor;
-import edu.uci.ics.hyracks.examples.btree.helper.IndexRegistryProvider;
+import edu.uci.ics.hyracks.examples.btree.helper.IndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.examples.btree.helper.StorageManagerInterface;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
 // This example will load a primary index from randomly generated data
@@ -60,9 +59,6 @@
         @Option(name = "-port", usage = "Hyracks Cluster Controller Port (default: 1098)")
         public int port = 1098;
 
-        @Option(name = "-app", usage = "Hyracks Application name", required = true)
-        public String app;
-
         @Option(name = "-target-ncs", usage = "Comma separated list of node-controller names to use", required = true)
         public String ncs;
 
@@ -86,7 +82,7 @@
         JobSpecification job = createJob(options);
 
         long start = System.currentTimeMillis();
-        JobId jobId = hcc.startJob(options.app, job);
+        JobId jobId = hcc.startJob(job);
         hcc.waitForCompletion(jobId);
         long end = System.currentTimeMillis();
         System.err.println(start + " " + end + " " + (end - start));
@@ -141,7 +137,7 @@
         typeTraits[3] = UTF8StringPointable.TYPE_TRAITS;
 
         // create providers for B-Tree
-        IIndexRegistryProvider<IIndex> indexRegistryProvider = IndexRegistryProvider.INSTANCE;
+        IIndexLifecycleManagerProvider lcManagerProvider = IndexLifecycleManagerProvider.INSTANCE;
         IStorageManagerInterface storageManager = StorageManagerInterface.INSTANCE;
 
         // the B-Tree expects its keyfields to be at the front of its input
@@ -152,8 +148,8 @@
         IFileSplitProvider btreeSplitProvider = JobHelper.createFileSplitProvider(splitNCs, options.btreeName);
         IIndexDataflowHelperFactory dataflowHelperFactory = new BTreeDataflowHelperFactory();
         TreeIndexBulkLoadOperatorDescriptor btreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, btreeSplitProvider, typeTraits, comparatorFactories,
-                fieldPermutation, 0.7f, dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, lcManagerProvider, btreeSplitProvider, typeTraits, comparatorFactories, null,
+                fieldPermutation, 0.7f, false, 1000L, dataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, btreeBulkLoad, splitNCs);
 
         // distribute the records from the datagen via hashing to the bulk load
diff --git a/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexSearchExample.java b/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexSearchExample.java
index d24ba33..3493947 100644
--- a/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexSearchExample.java
+++ b/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexSearchExample.java
@@ -38,14 +38,13 @@
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.misc.PrinterOperatorDescriptor;
-import edu.uci.ics.hyracks.examples.btree.helper.IndexRegistryProvider;
+import edu.uci.ics.hyracks.examples.btree.helper.IndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.examples.btree.helper.StorageManagerInterface;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
 // This example will perform an ordered scan on the primary index
@@ -59,9 +58,6 @@
         @Option(name = "-port", usage = "Hyracks Cluster Controller Port (default: 1098)")
         public int port = 1098;
 
-        @Option(name = "-app", usage = "Hyracks Application name", required = true)
-        public String app;
-
         @Option(name = "-target-ncs", usage = "Comma separated list of node-controller names to use", required = true)
         public String ncs;
 
@@ -79,7 +75,7 @@
         JobSpecification job = createJob(options);
 
         long start = System.currentTimeMillis();
-        JobId jobId = hcc.startJob(options.app, job);
+        JobId jobId = hcc.startJob(job);
         hcc.waitForCompletion(jobId);
         long end = System.currentTimeMillis();
         System.err.println(start + " " + end + " " + (end - start));
@@ -103,7 +99,7 @@
         comparatorFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
 
         // create roviders for B-Tree
-        IIndexRegistryProvider<IIndex> indexRegistryProvider = IndexRegistryProvider.INSTANCE;
+        IIndexLifecycleManagerProvider lcManagerProvider = IndexLifecycleManagerProvider.INSTANCE;
         IStorageManagerInterface storageManager = StorageManagerInterface.INSTANCE;
 
         // schema of tuples coming out of primary index
@@ -142,8 +138,8 @@
         IFileSplitProvider btreeSplitProvider = JobHelper.createFileSplitProvider(splitNCs, options.btreeName);
         IIndexDataflowHelperFactory dataflowHelperFactory = new BTreeDataflowHelperFactory();
         BTreeSearchOperatorDescriptor btreeSearchOp = new BTreeSearchOperatorDescriptor(spec, recDesc, storageManager,
-                indexRegistryProvider, btreeSplitProvider, typeTraits, comparatorFactories, lowKeyFields,
-                highKeyFields, true, true, dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                lcManagerProvider, btreeSplitProvider, typeTraits, comparatorFactories, null, lowKeyFields,
+                highKeyFields, true, true, dataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, btreeSearchOp, splitNCs);
 
         // have each node print the results of its respective B-Tree
diff --git a/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexBulkLoadExample.java b/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexBulkLoadExample.java
index 5aa338a..075ea20 100644
--- a/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexBulkLoadExample.java
+++ b/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexBulkLoadExample.java
@@ -33,15 +33,14 @@
 import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
-import edu.uci.ics.hyracks.examples.btree.helper.IndexRegistryProvider;
+import edu.uci.ics.hyracks.examples.btree.helper.IndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.examples.btree.helper.StorageManagerInterface;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDiskOrderScanOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
 // This example will load a secondary index with <key, primary-index key> pairs
@@ -55,9 +54,6 @@
         @Option(name = "-port", usage = "Hyracks Cluster Controller Port (default: 1098)")
         public int port = 1098;
 
-        @Option(name = "-app", usage = "Hyracks Application name", required = true)
-        public String app;
-
         @Option(name = "-target-ncs", usage = "Comma separated list of node-controller names to use", required = true)
         public String ncs;
 
@@ -81,7 +77,7 @@
         JobSpecification job = createJob(options);
 
         long start = System.currentTimeMillis();
-        JobId jobId = hcc.startJob(options.app, job);
+        JobId jobId = hcc.startJob(job);
         hcc.waitForCompletion(jobId);
         long end = System.currentTimeMillis();
         System.err.println(start + " " + end + " " + (end - start));
@@ -93,7 +89,7 @@
 
         String[] splitNCs = options.ncs.split(",");
 
-        IIndexRegistryProvider<IIndex> indexRegistryProvider = IndexRegistryProvider.INSTANCE;
+        IIndexLifecycleManagerProvider lcManagerProvider = IndexLifecycleManagerProvider.INSTANCE;
         IStorageManagerInterface storageManager = StorageManagerInterface.INSTANCE;
 
         // schema of tuples that we are retrieving from the primary index
@@ -122,8 +118,8 @@
         IFileSplitProvider primarySplitProvider = JobHelper.createFileSplitProvider(splitNCs, options.primaryBTreeName);
         IIndexDataflowHelperFactory dataflowHelperFactory = new BTreeDataflowHelperFactory();
         TreeIndexDiskOrderScanOperatorDescriptor btreeScanOp = new TreeIndexDiskOrderScanOperatorDescriptor(spec,
-                recDesc, storageManager, indexRegistryProvider, primarySplitProvider, primaryTypeTraits,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                recDesc, storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits,
+                dataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, btreeScanOp, splitNCs);
 
         // sort the tuples as preparation for bulk load into secondary index
@@ -144,8 +140,8 @@
         int[] fieldPermutation = { 1, 0 };
         IFileSplitProvider btreeSplitProvider = JobHelper.createFileSplitProvider(splitNCs, options.secondaryBTreeName);
         TreeIndexBulkLoadOperatorDescriptor btreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, btreeSplitProvider, secondaryTypeTraits, comparatorFactories,
-                fieldPermutation, 0.7f, dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, lcManagerProvider, btreeSplitProvider, secondaryTypeTraits, comparatorFactories, null,
+                fieldPermutation, 0.7f, false, 1000L, dataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, btreeBulkLoad, splitNCs);
 
         // connect the ops
diff --git a/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexSearchExample.java b/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexSearchExample.java
index 277668b..a6ffc13 100644
--- a/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexSearchExample.java
+++ b/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexSearchExample.java
@@ -38,14 +38,13 @@
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.misc.PrinterOperatorDescriptor;
-import edu.uci.ics.hyracks.examples.btree.helper.IndexRegistryProvider;
+import edu.uci.ics.hyracks.examples.btree.helper.IndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.examples.btree.helper.StorageManagerInterface;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
 // This example will perform range search on the secondary index
@@ -59,9 +58,6 @@
         @Option(name = "-port", usage = "Hyracks Cluster Controller Port (default: 1098)")
         public int port = 1098;
 
-        @Option(name = "-app", usage = "Hyracks Application name", required = true)
-        public String app;
-
         @Option(name = "-target-ncs", usage = "Comma separated list of node-controller names to use", required = true)
         public String ncs;
 
@@ -82,7 +78,7 @@
         JobSpecification job = createJob(options);
 
         long start = System.currentTimeMillis();
-        JobId jobId = hcc.startJob(options.app, job);
+        JobId jobId = hcc.startJob(job);
         hcc.waitForCompletion(jobId);
         long end = System.currentTimeMillis();
         System.err.println(start + " " + end + " " + (end - start));
@@ -94,7 +90,7 @@
 
         String[] splitNCs = options.ncs.split(",");
 
-        IIndexRegistryProvider<IIndex> indexRegistryProvider = IndexRegistryProvider.INSTANCE;
+        IIndexLifecycleManagerProvider lcManagerProvider = IndexLifecycleManagerProvider.INSTANCE;
         IStorageManagerInterface storageManager = StorageManagerInterface.INSTANCE;
 
         // schema of tuples coming out of secondary index
@@ -168,9 +164,9 @@
                 options.secondaryBTreeName);
         IIndexDataflowHelperFactory dataflowHelperFactory = new BTreeDataflowHelperFactory();
         BTreeSearchOperatorDescriptor secondarySearchOp = new BTreeSearchOperatorDescriptor(spec, secondaryRecDesc,
-                storageManager, indexRegistryProvider, secondarySplitProvider, secondaryTypeTraits,
-                searchComparatorFactories, secondaryLowKeyFields, secondaryHighKeyFields, true, true,
-                dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
+                searchComparatorFactories, null, secondaryLowKeyFields, secondaryHighKeyFields, true, true,
+                dataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, secondarySearchOp, splitNCs);
 
         // secondary index will output tuples with [UTF8String, Integer]
@@ -184,9 +180,9 @@
 
         IFileSplitProvider primarySplitProvider = JobHelper.createFileSplitProvider(splitNCs, options.primaryBTreeName);
         BTreeSearchOperatorDescriptor primarySearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
-                storageManager, indexRegistryProvider, primarySplitProvider, primaryTypeTraits,
-                primaryComparatorFactories, primaryLowKeyFields, primaryHighKeyFields, true, true,
-                dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                null, primaryLowKeyFields, primaryHighKeyFields, true, true, dataflowHelperFactory, false,
+                NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, primarySearchOp, splitNCs);
 
         // have each node print the results of its respective B-Tree
diff --git a/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml b/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml
index 7f212ab..637612d 100644
--- a/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml
+++ b/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml
@@ -6,32 +6,32 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>btree-example</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-data-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   	</dependency>
   </dependencies>
   <build>
diff --git a/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/IndexLifecycleManagerProvider.java b/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/IndexLifecycleManagerProvider.java
new file mode 100644
index 0000000..6a17755
--- /dev/null
+++ b/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/IndexLifecycleManagerProvider.java
@@ -0,0 +1,15 @@
+package edu.uci.ics.hyracks.examples.btree.helper;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+
+public enum IndexLifecycleManagerProvider implements IIndexLifecycleManagerProvider {
+    INSTANCE;
+
+    @Override
+    public IIndexLifecycleManager getLifecycleManager(IHyracksTaskContext ctx) {
+        return RuntimeContext.get(ctx).getIndexLifecycleManager();
+    }
+
+}
diff --git a/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/IndexRegistryProvider.java b/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/IndexRegistryProvider.java
deleted file mode 100644
index d1f40d8..0000000
--- a/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/IndexRegistryProvider.java
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.examples.btree.helper;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexRegistry;
-
-public class IndexRegistryProvider implements IIndexRegistryProvider<IIndex> {
-    private static final long serialVersionUID = 1L;
-
-    public static final IndexRegistryProvider INSTANCE = new IndexRegistryProvider();
-
-    private IndexRegistryProvider() {
-    }
-
-    @Override
-    public IndexRegistry<IIndex> getRegistry(IHyracksTaskContext ctx) {
-        return RuntimeContext.get(ctx).getIndexRegistry();
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/NCApplicationEntryPoint.java b/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/NCApplicationEntryPoint.java
new file mode 100644
index 0000000..a1dacd8
--- /dev/null
+++ b/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/NCApplicationEntryPoint.java
@@ -0,0 +1,22 @@
+package edu.uci.ics.hyracks.examples.btree.helper;
+
+import edu.uci.ics.hyracks.api.application.INCApplicationContext;
+import edu.uci.ics.hyracks.api.application.INCApplicationEntryPoint;
+
+public class NCApplicationEntryPoint implements INCApplicationEntryPoint {
+    @Override
+    public void start(INCApplicationContext ncAppCtx, String[] args) throws Exception {
+        RuntimeContext rCtx = new RuntimeContext(ncAppCtx);
+        ncAppCtx.setApplicationObject(rCtx);
+    }
+
+    @Override
+    public void notifyStartupComplete() throws Exception {
+
+    }
+
+    @Override
+    public void stop() throws Exception {
+
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/NCBootstrap.java b/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/NCBootstrap.java
deleted file mode 100644
index ea55e7a..0000000
--- a/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/NCBootstrap.java
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.examples.btree.helper;
-
-import java.util.logging.Logger;
-
-import edu.uci.ics.hyracks.api.application.INCApplicationContext;
-import edu.uci.ics.hyracks.api.application.INCBootstrap;
-
-public class NCBootstrap implements INCBootstrap {
-    private static final Logger LOGGER = Logger.getLogger(NCBootstrap.class.getName());
-
-    private INCApplicationContext appCtx;
-
-    @Override
-    public void start() throws Exception {
-        LOGGER.info("Starting NC Bootstrap");
-        RuntimeContext rCtx = new RuntimeContext(appCtx);
-        appCtx.setApplicationObject(rCtx);
-        LOGGER.info("Initialized RuntimeContext: " + rCtx);
-    }
-
-    @Override
-    public void stop() throws Exception {
-        LOGGER.info("Stopping Asterix NC Bootstrap");
-        RuntimeContext rCtx = (RuntimeContext) appCtx.getApplicationObject();
-        rCtx.close();
-    }
-
-    @Override
-    public void setApplicationContext(INCApplicationContext appCtx) {
-        this.appCtx = appCtx;
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/RuntimeContext.java b/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/RuntimeContext.java
index 56d517f..aa5ce1d 100644
--- a/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/RuntimeContext.java
+++ b/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/RuntimeContext.java
@@ -17,8 +17,9 @@
 
 import edu.uci.ics.hyracks.api.application.INCApplicationContext;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexRegistry;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexLifecycleManager;
 import edu.uci.ics.hyracks.storage.common.buffercache.BufferCache;
 import edu.uci.ics.hyracks.storage.common.buffercache.ClockPageReplacementStrategy;
 import edu.uci.ics.hyracks.storage.common.buffercache.DelayPageCleanerPolicy;
@@ -28,20 +29,30 @@
 import edu.uci.ics.hyracks.storage.common.buffercache.IPageReplacementStrategy;
 import edu.uci.ics.hyracks.storage.common.file.IFileMapManager;
 import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
-import edu.uci.ics.hyracks.storage.common.smi.TransientFileMapManager;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceRepository;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceRepositoryFactory;
+import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactory;
+import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactoryProvider;
+import edu.uci.ics.hyracks.storage.common.file.TransientFileMapManager;
+import edu.uci.ics.hyracks.storage.common.file.TransientLocalResourceRepositoryFactory;
 
 public class RuntimeContext {
-    private IndexRegistry<IIndex> indexRegistry;
     private IBufferCache bufferCache;
     private IFileMapManager fileMapManager;
+    private ILocalResourceRepository localResourceRepository;
+    private IIndexLifecycleManager lcManager;
+    private ResourceIdFactory resourceIdFactory;
 
-    public RuntimeContext(INCApplicationContext appCtx) {
+    public RuntimeContext(INCApplicationContext appCtx) throws HyracksDataException {
         fileMapManager = new TransientFileMapManager();
         ICacheMemoryAllocator allocator = new HeapBufferAllocator();
         IPageReplacementStrategy prs = new ClockPageReplacementStrategy();
         bufferCache = new BufferCache(appCtx.getRootContext().getIOManager(), allocator, prs,
                 new DelayPageCleanerPolicy(1000), fileMapManager, 32768, 50, 100);
-        indexRegistry = new IndexRegistry<IIndex>();
+        lcManager = new IndexLifecycleManager();
+        ILocalResourceRepositoryFactory localResourceRepositoryFactory = new TransientLocalResourceRepositoryFactory();
+        localResourceRepository = localResourceRepositoryFactory.createRepository();
+        resourceIdFactory = (new ResourceIdFactoryProvider(localResourceRepository)).createResourceIdFactory();
     }
 
     public void close() {
@@ -56,11 +67,19 @@
         return fileMapManager;
     }
 
-    public IndexRegistry<IIndex> getIndexRegistry() {
-        return indexRegistry;
-    }
-
     public static RuntimeContext get(IHyracksTaskContext ctx) {
         return (RuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject();
     }
+
+    public ILocalResourceRepository getLocalResourceRepository() {
+        return localResourceRepository;
+    }
+
+    public ResourceIdFactory getResourceIdFactory() {
+        return resourceIdFactory;
+    }
+
+    public IIndexLifecycleManager getIndexLifecycleManager() {
+        return lcManager;
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/StorageManagerInterface.java b/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/StorageManagerInterface.java
index 4c6363b..e19847e 100644
--- a/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/StorageManagerInterface.java
+++ b/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/StorageManagerInterface.java
@@ -19,6 +19,8 @@
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceRepository;
+import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactory;
 
 public class StorageManagerInterface implements IStorageManagerInterface {
     private static final long serialVersionUID = 1L;
@@ -37,4 +39,14 @@
     public IFileMapProvider getFileMapProvider(IHyracksTaskContext ctx) {
         return RuntimeContext.get(ctx).getFileMapManager();
     }
+
+    @Override
+    public ILocalResourceRepository getLocalResourceRepository(IHyracksTaskContext ctx) {
+        return RuntimeContext.get(ctx).getLocalResourceRepository();
+    }
+
+    @Override
+    public ResourceIdFactory getResourceIdFactory(IHyracksTaskContext ctx) {
+        return RuntimeContext.get(ctx).getResourceIdFactory();
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/btree-example/btreehelper/src/main/resources/hyracks-deployment.properties b/hyracks/hyracks-examples/btree-example/btreehelper/src/main/resources/hyracks-deployment.properties
deleted file mode 100644
index ab0ecb3..0000000
--- a/hyracks/hyracks-examples/btree-example/btreehelper/src/main/resources/hyracks-deployment.properties
+++ /dev/null
@@ -1 +0,0 @@
-nc.bootstrap.class=edu.uci.ics.hyracks.examples.btree.helper.NCBootstrap
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/btree-example/btreeserver/pom.xml b/hyracks/hyracks-examples/btree-example/btreeserver/pom.xml
new file mode 100644
index 0000000..ead4e89
--- /dev/null
+++ b/hyracks/hyracks-examples/btree-example/btreeserver/pom.xml
@@ -0,0 +1,84 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>edu.uci.ics.hyracks.examples.btree</groupId>
+  <artifactId>btreeserver</artifactId>
+  <version>0.2.5-SNAPSHOT</version>
+  <name>btreeserver</name>
+
+  <parent>
+    <groupId>edu.uci.ics.hyracks.examples</groupId>
+    <artifactId>btree-example</artifactId>
+    <version>0.2.5-SNAPSHOT</version>
+  </parent>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>appassembler-maven-plugin</artifactId>
+        <version>1.3</version>
+        <executions>
+          <execution>
+            <configuration>
+              <programs>
+                <program>
+                  <mainClass>edu.uci.ics.hyracks.control.cc.CCDriver</mainClass>
+                  <name>hyrackscc</name>
+                </program>
+                <program>
+                  <mainClass>edu.uci.ics.hyracks.control.nc.NCDriver</mainClass>
+                  <name>hyracksnc</name>
+                </program>
+              </programs>
+              <repositoryLayout>flat</repositoryLayout>
+              <repositoryName>lib</repositoryName>
+            </configuration>
+            <phase>package</phase>
+            <goals>
+              <goal>assemble</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <artifactId>maven-assembly-plugin</artifactId>
+        <version>2.2-beta-5</version>
+        <executions>
+          <execution>
+            <configuration>
+              <descriptors>
+                <descriptor>src/main/assembly/binary-assembly.xml</descriptor>
+              </descriptors>
+            </configuration>
+            <phase>package</phase>
+            <goals>
+              <goal>attached</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks.examples.btree</groupId>
+  		<artifactId>btreehelper</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-control-cc</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-control-nc</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  </dependencies>
+</project>
diff --git a/hyracks/hyracks-examples/btree-example/btreeserver/src/main/assembly/binary-assembly.xml b/hyracks/hyracks-examples/btree-example/btreeserver/src/main/assembly/binary-assembly.xml
new file mode 100644
index 0000000..cd598d9
--- /dev/null
+++ b/hyracks/hyracks-examples/btree-example/btreeserver/src/main/assembly/binary-assembly.xml
@@ -0,0 +1,23 @@
+<assembly>
+  <id>binary-assembly</id>
+  <formats>
+    <format>zip</format>
+    <format>dir</format>
+  </formats>
+  <includeBaseDirectory>false</includeBaseDirectory>
+  <fileSets>
+    <fileSet>
+      <directory>target/appassembler/bin</directory>
+      <outputDirectory>bin</outputDirectory>
+      <fileMode>0755</fileMode>
+    </fileSet>
+    <fileSet>
+      <directory>target/appassembler/lib</directory>
+      <outputDirectory>lib</outputDirectory>
+    </fileSet>
+    <fileSet>
+      <directory>docs</directory>
+      <outputDirectory>docs</outputDirectory>
+    </fileSet>
+  </fileSets>
+</assembly>
diff --git a/hyracks/hyracks-examples/btree-example/pom.xml b/hyracks/hyracks-examples/btree-example/pom.xml
index b6fbb95..ce0a486 100644
--- a/hyracks/hyracks-examples/btree-example/pom.xml
+++ b/hyracks/hyracks-examples/btree-example/pom.xml
@@ -2,19 +2,18 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks.examples</groupId>
   <artifactId>btree-example</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>btree-example</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-examples</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <modules>
     <module>btreehelper</module>
     <module>btreeclient</module>
-    <module>btreeapp</module>
+    <module>btreeserver</module>
   </modules>
 </project>
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/pom.xml b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/pom.xml
deleted file mode 100644
index 6171214..0000000
--- a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/pom.xml
+++ /dev/null
@@ -1,192 +0,0 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks.examples.compat</groupId>
-  <artifactId>hadoopcompatapp</artifactId>
-  <name>hadoopcompatapp</name>
-
-  <parent>
-    <groupId>edu.uci.ics.hyracks.examples</groupId>
-    <artifactId>hadoop-compat-example</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
-  </parent>
-
-  <build>
-    <pluginManagement>
-      <plugins>
-        <plugin>
-          <groupId>org.eclipse.m2e</groupId>
-          <artifactId>lifecycle-mapping</artifactId>
-          <version>1.0.0</version>
-          <configuration>
-            <lifecycleMappingMetadata>
-              <pluginExecutions>
-                <pluginExecution>
-                  <pluginExecutionFilter>
-                    <groupId>org.apache.maven.plugins</groupId>
-                    <artifactId>maven-dependency-plugin</artifactId>
-                    <versionRange>[1.0.0,)</versionRange>
-                    <goals>
-                      <goal>copy-dependencies</goal>
-                    </goals>
-                  </pluginExecutionFilter>
-                  <action>
-                    <ignore />
-                  </action>
-                </pluginExecution>
-              </pluginExecutions>
-            </lifecycleMappingMetadata>
-          </configuration>
-        </plugin>
-      </plugins>
-	</pluginManagement>
-  
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-dependency-plugin</artifactId>
-        <executions>
-          <execution>
-            <id>copy-dependencies</id>
-            <phase>package</phase>
-            <goals>
-              <goal>copy-dependencies</goal>
-            </goals>
-            <configuration>
-              <outputDirectory>target/application/lib</outputDirectory>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
-      <plugin>
-        <artifactId>maven-assembly-plugin</artifactId>
-        <version>2.2-beta-5</version>
-        <executions>
-          <execution>
-            <configuration>
-              <descriptors>
-                <descriptor>src/main/assembly/app-assembly.xml</descriptor>
-              </descriptors>
-            </configuration>
-            <phase>package</phase>
-            <goals>
-              <goal>attached</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
-      <plugin>
-      	<groupId>edu.uci.ics.hyracks</groupId>
-      	<artifactId>hyracks-virtualcluster-maven-plugin</artifactId>
-      	<version>0.2.4-SNAPSHOT</version>
-        <configuration>
-          <hyracksServerHome>${basedir}/../../../hyracks-server/target/hyracks-server-${project.version}-binary-assembly</hyracksServerHome>
-          <hyracksCLIHome>${basedir}/../../../hyracks-cli/target/hyracks-cli-${project.version}-binary-assembly</hyracksCLIHome>
-          <jvmOptions>${jvm.extraargs}</jvmOptions>
-        </configuration>
-        <executions>
-          <execution>
-            <id>hyracks-cc-start</id>
-            <phase>pre-integration-test</phase>
-            <goals>
-              <goal>start-cc</goal>
-            </goals>
-            <configuration>
-	      <workingDir>${project.build.directory}</workingDir>
-            </configuration>
-          </execution>
-          <execution>
-            <id>hyracks-nc1-start</id>
-            <phase>pre-integration-test</phase>
-            <goals>
-              <goal>start-nc</goal>
-            </goals>
-            <configuration>
-              <nodeId>NC1</nodeId>
-              <dataIpAddress>127.0.0.1</dataIpAddress>
-              <ccHost>localhost</ccHost>
-	      <workingDir>${project.build.directory}</workingDir>
-            </configuration>
-          </execution>
-          <execution>
-            <id>hyracks-nc2-start</id>
-            <phase>pre-integration-test</phase>
-            <goals>
-              <goal>start-nc</goal>
-            </goals>
-            <configuration>
-              <nodeId>NC2</nodeId>
-              <dataIpAddress>127.0.0.1</dataIpAddress>
-              <ccHost>localhost</ccHost>
-	      <workingDir>${project.build.directory}</workingDir>
-            </configuration>
-          </execution>
-          <execution>
-            <id>deploy-app</id>
-            <phase>pre-integration-test</phase>
-            <goals>
-              <goal>deploy-app</goal>
-            </goals>
-            <configuration>
-              <ccHost>localhost</ccHost>
-              <appName>compat</appName>
-              <harFile>${project.build.directory}/hadoopcompatapp-${project.version}-app-assembly.zip</harFile>
-            </configuration>
-          </execution>
-	     <execution>
-	       <id>stop-services</id>
-	       <phase>post-integration-test</phase>
-	       <goals>
-	         <goal>stop-services</goal>
-	       </goals>
-             </execution>
-          </executions>
-      </plugin>
-      <plugin>
-      	<groupId>org.apache.maven.plugins</groupId>
-      	<artifactId>maven-compiler-plugin</artifactId>
-      	<version>2.0.2</version>
-        <configuration>
-          <source>1.7</source>
-          <target>1.7</target>
-          <fork>true</fork>
-        </configuration>
-      </plugin>
-      <plugin>
-      	<groupId>org.apache.maven.plugins</groupId>
-      	<artifactId>maven-failsafe-plugin</artifactId>
-      	<version>2.8.1</version>
-      	<executions>
-      	  <execution>
-      	    <id>it</id>
-      	    <phase>integration-test</phase>
-      	    <goals>
-      	      <goal>integration-test</goal>
-      	    </goals>
-      	  </execution>
-      	</executions>
-      </plugin>
-    </plugins>
-  </build>
-  <dependencies>
-     <dependency>
-        <groupId>edu.uci.ics.hyracks.examples.compat</groupId>
-        <artifactId>hadoopcompathelper</artifactId>
-        <version>0.2.4-SNAPSHOT</version>
-        <scope>compile</scope>
-     </dependency>
-     <dependency>
-        <groupId>edu.uci.ics.hyracks.examples.compat</groupId>
-  	    <artifactId>hadoopcompatclient</artifactId>
-  	    <version>0.2.4-SNAPSHOT</version>
-  	    <type>jar</type>
-  	    <scope>test</scope>
-     </dependency>
-     <dependency>
-  	    <groupId>junit</groupId>
-  	    <artifactId>junit</artifactId>
-  	    <version>4.8.2</version>
-  	    <type>jar</type>
-  	    <scope>test</scope>
-     </dependency>
-  </dependencies>
-</project>
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/src/main/assembly/app-assembly.xml b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/src/main/assembly/app-assembly.xml
deleted file mode 100644
index 43ace6c..0000000
--- a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/src/main/assembly/app-assembly.xml
+++ /dev/null
@@ -1,13 +0,0 @@
-<assembly>
-  <id>app-assembly</id>
-  <formats>
-    <format>zip</format>
-  </formats>
-  <includeBaseDirectory>false</includeBaseDirectory>
-  <fileSets>
-    <fileSet>
-      <directory>target/application/lib</directory>
-      <outputDirectory>lib</outputDirectory>
-    </fileSet>
-  </fileSets>
-</assembly>
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatclient/pom.xml b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatclient/pom.xml
index 31809c7..e618295 100644
--- a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatclient/pom.xml
+++ b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatclient/pom.xml
@@ -7,20 +7,20 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>hadoop-compat-example</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks.examples.compat</groupId>
   		<artifactId>hadoopcompathelper</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompathelper/pom.xml b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompathelper/pom.xml
index e8a9a1b..5f7f072 100644
--- a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompathelper/pom.xml
+++ b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompathelper/pom.xml
@@ -7,20 +7,20 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>hadoop-compat-example</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   </dependencies>
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/conf/local_cluster.conf b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/conf/local_cluster.conf
similarity index 100%
rename from hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/conf/local_cluster.conf
rename to hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/conf/local_cluster.conf
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/data/file1.txt b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/data/file1.txt
similarity index 100%
rename from hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/data/file1.txt
rename to hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/data/file1.txt
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/data/file2.txt b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/data/file2.txt
similarity index 100%
rename from hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/data/file2.txt
rename to hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/data/file2.txt
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/job/wordcount/wordcount.job b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/job/wordcount/wordcount.job
similarity index 100%
rename from hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/job/wordcount/wordcount.job
rename to hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/job/wordcount/wordcount.job
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/pom.xml b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/pom.xml
new file mode 100644
index 0000000..6536606
--- /dev/null
+++ b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/pom.xml
@@ -0,0 +1,171 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>edu.uci.ics.hyracks.examples.compat</groupId>
+  <artifactId>hadoopcompatserver</artifactId>
+  <version>0.2.5-SNAPSHOT</version>
+  <name>hadoopcompatserver</name>
+
+  <parent>
+    <groupId>edu.uci.ics.hyracks.examples</groupId>
+    <artifactId>hadoop-compat-example</artifactId>
+    <version>0.2.5-SNAPSHOT</version>
+  </parent>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>appassembler-maven-plugin</artifactId>
+        <version>1.3</version>
+        <executions>
+          <execution>
+            <configuration>
+              <programs>
+                <program>
+                  <mainClass>edu.uci.ics.hyracks.control.cc.CCDriver</mainClass>
+                  <name>hyrackscc</name>
+                </program>
+                <program>
+                  <mainClass>edu.uci.ics.hyracks.control.nc.NCDriver</mainClass>
+                  <name>hyracksnc</name>
+                </program>
+              </programs>
+              <repositoryLayout>flat</repositoryLayout>
+              <repositoryName>lib</repositoryName>
+            </configuration>
+            <phase>package</phase>
+            <goals>
+              <goal>assemble</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <artifactId>maven-assembly-plugin</artifactId>
+        <version>2.2-beta-5</version>
+        <executions>
+          <execution>
+            <configuration>
+              <descriptors>
+                <descriptor>src/main/assembly/binary-assembly.xml</descriptor>
+              </descriptors>
+            </configuration>
+            <phase>package</phase>
+            <goals>
+              <goal>attached</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+      	<groupId>edu.uci.ics.hyracks</groupId>
+      	<artifactId>hyracks-virtualcluster-maven-plugin</artifactId>
+      	<version>0.2.5-SNAPSHOT</version>
+        <configuration>
+          <hyracksServerHome>${basedir}/target/hadoopcompatserver-${project.version}-binary-assembly</hyracksServerHome>
+          <jvmOptions>${jvm.extraargs}</jvmOptions>
+        </configuration>
+        <executions>
+          <execution>
+            <id>hyracks-cc-start</id>
+            <phase>pre-integration-test</phase>
+            <goals>
+              <goal>start-cc</goal>
+            </goals>
+          </execution>
+          <execution>
+            <id>hyracks-nc1-start</id>
+            <phase>pre-integration-test</phase>
+            <goals>
+              <goal>start-nc</goal>
+            </goals>
+            <configuration>
+              <nodeId>NC1</nodeId>
+              <dataIpAddress>127.0.0.1</dataIpAddress>
+              <ccHost>localhost</ccHost>
+            </configuration>
+          </execution>
+          <execution>
+            <id>hyracks-nc2-start</id>
+            <phase>pre-integration-test</phase>
+            <goals>
+              <goal>start-nc</goal>
+            </goals>
+            <configuration>
+              <nodeId>NC2</nodeId>
+              <dataIpAddress>127.0.0.1</dataIpAddress>
+              <ccHost>localhost</ccHost>
+            </configuration>
+          </execution>
+          <execution>
+            <id>stop-services</id>
+            <phase>post-integration-test</phase>
+            <goals>
+              <goal>stop-services</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+      	<groupId>org.apache.maven.plugins</groupId>
+      	<artifactId>maven-compiler-plugin</artifactId>
+      	<version>2.0.2</version>
+        <configuration>
+          <source>1.7</source>
+          <target>1.7</target>
+          <fork>true</fork>
+        </configuration>
+      </plugin>
+      <plugin>
+      	<groupId>org.apache.maven.plugins</groupId>
+      	<artifactId>maven-failsafe-plugin</artifactId>
+      	<version>2.8.1</version>
+      	<executions>
+      	  <execution>
+      	    <id>it</id>
+      	    <phase>integration-test</phase>
+      	    <goals>
+      	      <goal>integration-test</goal>
+      	    </goals>
+      	  </execution>
+      	</executions>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+     <dependency>
+        <groupId>edu.uci.ics.hyracks.examples.compat</groupId>
+        <artifactId>hadoopcompathelper</artifactId>
+        <version>0.2.5-SNAPSHOT</version>
+        <scope>compile</scope>
+     </dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-control-cc</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-control-nc</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+     <dependency>
+        <groupId>edu.uci.ics.hyracks.examples.compat</groupId>
+  	    <artifactId>hadoopcompatclient</artifactId>
+  	    <version>0.2.5-SNAPSHOT</version>
+  	    <type>jar</type>
+  	    <scope>test</scope>
+     </dependency>
+     <dependency>
+  	    <groupId>junit</groupId>
+  	    <artifactId>junit</artifactId>
+  	    <version>4.8.2</version>
+  	    <type>jar</type>
+  	    <scope>test</scope>
+     </dependency>
+  </dependencies>
+</project>
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/src/main/assembly/binary-assembly.xml b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/src/main/assembly/binary-assembly.xml
new file mode 100644
index 0000000..cd598d9
--- /dev/null
+++ b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/src/main/assembly/binary-assembly.xml
@@ -0,0 +1,23 @@
+<assembly>
+  <id>binary-assembly</id>
+  <formats>
+    <format>zip</format>
+    <format>dir</format>
+  </formats>
+  <includeBaseDirectory>false</includeBaseDirectory>
+  <fileSets>
+    <fileSet>
+      <directory>target/appassembler/bin</directory>
+      <outputDirectory>bin</outputDirectory>
+      <fileMode>0755</fileMode>
+    </fileSet>
+    <fileSet>
+      <directory>target/appassembler/lib</directory>
+      <outputDirectory>lib</outputDirectory>
+    </fileSet>
+    <fileSet>
+      <directory>docs</directory>
+      <outputDirectory>docs</outputDirectory>
+    </fileSet>
+  </fileSets>
+</assembly>
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/src/test/java/edu/uci/ics/hyracks/examples/compat/test/WordCountCompatibilityIT.java b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/src/test/java/edu/uci/ics/hyracks/examples/compat/test/WordCountCompatibilityIT.java
similarity index 100%
rename from hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/src/test/java/edu/uci/ics/hyracks/examples/compat/test/WordCountCompatibilityIT.java
rename to hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/src/test/java/edu/uci/ics/hyracks/examples/compat/test/WordCountCompatibilityIT.java
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/pom.xml b/hyracks/hyracks-examples/hadoop-compat-example/pom.xml
index 9d07031..980e800 100644
--- a/hyracks/hyracks-examples/hadoop-compat-example/pom.xml
+++ b/hyracks/hyracks-examples/hadoop-compat-example/pom.xml
@@ -8,13 +8,13 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-examples</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <modules>
     <module>hadoopcompathelper</module>
     <module>hadoopcompatclient</module>
-    <module>hadoopcompatapp</module>
+    <module>hadoopcompatserver</module>
   </modules>
 
   <dependencies>
@@ -29,7 +29,7 @@
       <dependency>
          <groupId>edu.uci.ics.hyracks</groupId>
          <artifactId>hyracks-hadoop-compat</artifactId>
-         <version>0.2.4-SNAPSHOT</version>
+         <version>0.2.5-SNAPSHOT</version>
          <type>jar</type>
          <scope>compile</scope>
       </dependency>
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/data/orders-with-locations-part1.txt b/hyracks/hyracks-examples/hyracks-integration-tests/data/orders-with-locations-part1.txt
new file mode 100644
index 0000000..e1d423f
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/data/orders-with-locations-part1.txt
@@ -0,0 +1,557 @@
+1|37|O|131251.81|1996-01-02|5-LOW|Clerk#000000951|0|nstructions sleep furiously among |42.3631|-71.065|42.3631|-71.065|
+2|79|O|40183.29|1996-12-01|1-URGENT|Clerk#000000880|0| foxes. pending accounts at the pending, silent asymptot|42.1091|-70.696|42.1091|-70.696|
+3|124|F|160882.76|1993-10-14|5-LOW|Clerk#000000955|0|sly final accounts boost. carefully regular ideas cajole carefully. depos|40.8151|-73.0452|40.8151|-73.0452|
+4|137|O|31084.79|1995-10-11|5-LOW|Clerk#000000124|0|sits. slyly regular warthogs cajole. regular, regular theodolites acro|40.8151|-73.0452|40.8151|-73.0452|
+5|46|F|86615.25|1994-07-30|5-LOW|Clerk#000000925|0|quickly. bold deposits sleep slyly. packages use slyly|42.2481|-71.174|42.2481|-71.174|
+6|56|F|36468.55|1992-02-21|4-NOT SPECIFIED|Clerk#000000058|0|ggle. special, final requests are against the furiously specia|61.1201|-149.89|61.1201|-149.89|
+7|40|O|171488.73|1996-01-10|2-HIGH|Clerk#000000470|0|ly special requests |61.1501|-149.926|61.1501|-149.926|
+32|131|O|116923.00|1995-07-16|2-HIGH|Clerk#000000616|0|ise blithely bold, regular requests. quickly unusual dep|61.181|-149.814|61.181|-149.814|
+33|67|F|99798.76|1993-10-27|3-MEDIUM|Clerk#000000409|0|uriously. furiously final request|61.1517|-149.86|61.1517|-149.86|
+34|62|O|41670.02|1998-07-21|3-MEDIUM|Clerk#000000223|0|ly final packages. fluffily final deposits wake blithely ideas. spe|61.1806|-149.814|61.1806|-149.814|
+35|128|O|148789.52|1995-10-23|4-NOT SPECIFIED|Clerk#000000259|0|zzle. carefully enticing deposits nag furio|61.1806|-149.775|61.1806|-149.775|
+36|116|O|38988.98|1995-11-03|1-URGENT|Clerk#000000358|0| quick packages are blithely. slyly silent accounts wake qu|61.1806|-149.775|61.1806|-149.775|
+37|88|F|113701.89|1992-06-03|3-MEDIUM|Clerk#000000456|0|kly regular pinto beans. carefully unusual waters cajole never|61.1806|-149.775|61.1806|-149.775|
+38|125|O|46366.56|1996-08-21|4-NOT SPECIFIED|Clerk#000000604|0|haggle blithely. furiously express ideas haggle blithely furiously regular re|61.2113|-149.824|61.2113|-149.824|
+39|82|O|219707.84|1996-09-20|3-MEDIUM|Clerk#000000659|0|ole express, ironic requests: ir|61.1967|-149.877|61.1967|-149.877|
+64|34|F|20065.73|1994-07-16|3-MEDIUM|Clerk#000000661|0|wake fluffily. sometimes ironic pinto beans about the dolphin|61.2164|-149.892|61.2164|-149.892|
+65|17|P|65883.92|1995-03-18|1-URGENT|Clerk#000000632|0|ular requests are blithely pending orbits-- even requests against the deposit|61.1571|-149.883|61.1571|-149.883|
+66|130|F|79258.24|1994-01-20|5-LOW|Clerk#000000743|0|y pending requests integrate|61.2048|-149.834|61.2048|-149.834|
+67|58|O|116227.05|1996-12-19|4-NOT SPECIFIED|Clerk#000000547|0|symptotes haggle slyly around the furiously iron|61.0956|-149.843|61.0956|-149.843|
+68|29|O|215135.72|1998-04-18|3-MEDIUM|Clerk#000000440|0| pinto beans sleep carefully. blithely ironic deposits haggle furiously acro|61.1491|-149.809|61.1491|-149.809|
+69|85|F|162176.23|1994-06-04|4-NOT SPECIFIED|Clerk#000000330|0| depths atop the slyly thin deposits detect among the furiously silent accou|61.1981|-149.871|61.1981|-149.871|
+70|65|F|84651.80|1993-12-18|5-LOW|Clerk#000000322|0| carefully ironic request|61.1982|-149.876|61.1982|-149.876|
+71|4|O|178821.73|1998-01-24|4-NOT SPECIFIED|Clerk#000000271|0| express deposits along the blithely regul|61.1924|-149.909|61.1924|-149.909|
+96|109|F|55090.67|1994-04-17|2-HIGH|Clerk#000000395|0|oost furiously. pinto|61.2204|-149.728|61.2204|-149.728|
+97|22|F|68908.31|1993-01-29|3-MEDIUM|Clerk#000000547|0|hang blithely along the regular accounts. furiously even ideas after the|61.196|-149.864|61.196|-149.864|
+98|106|F|51004.44|1994-09-25|1-URGENT|Clerk#000000448|0|c asymptotes. quickly regular packages should have to nag re|61.1987|-149.889|61.1987|-149.889|
+99|89|F|92326.79|1994-03-13|4-NOT SPECIFIED|Clerk#000000973|0|e carefully ironic packages. pending|61.1984|-149.897|61.1984|-149.897|
+100|148|O|141311.01|1998-02-28|4-NOT SPECIFIED|Clerk#000000577|0|heodolites detect slyly alongside of the ent|61.1897|-149.898|61.1897|-149.898|
+101|28|O|95591.40|1996-03-17|3-MEDIUM|Clerk#000000419|0|ding accounts above the slyly final asymptote|61.1228|-149.81|61.1228|-149.81|
+102|1|O|113954.89|1997-05-09|2-HIGH|Clerk#000000596|0| slyly according to the asymptotes. carefully final packages integrate furious|61.1649|-149.881|61.1649|-149.881|
+103|31|O|95563.95|1996-06-20|4-NOT SPECIFIED|Clerk#000000090|0|ges. carefully unusual instructions haggle quickly regular f|61.1934|-149.887|61.1934|-149.887|
+128|74|F|36333.34|1992-06-15|1-URGENT|Clerk#000000385|0|ns integrate fluffily. ironic asymptotes after the regular excuses nag around |61.2164|-149.892|61.2164|-149.892|
+129|73|F|188124.55|1992-11-19|5-LOW|Clerk#000000859|0|ing tithes. carefully pending deposits boost about the silently express |61.1932|-149.886|61.1932|-149.886|
+130|37|F|115717.37|1992-05-08|2-HIGH|Clerk#000000036|0|le slyly unusual, regular packages? express deposits det|61.2072|-149.888|61.2072|-149.888|
+131|94|F|96596.81|1994-06-08|3-MEDIUM|Clerk#000000625|0|after the fluffily special foxes integrate s|61.2125|-149.904|61.2125|-149.904|
+132|28|F|118802.62|1993-06-11|3-MEDIUM|Clerk#000000488|0|sits are daringly accounts. carefully regular foxes sleep slyly about the|61.2142|-149.806|61.2142|-149.806|
+133|44|O|80437.72|1997-11-29|1-URGENT|Clerk#000000738|0|usly final asymptotes |61.1866|-149.923|61.1866|-149.923|
+134|7|F|154260.84|1992-05-01|4-NOT SPECIFIED|Clerk#000000711|0|lar theodolites boos|61.1089|-149.857|61.1089|-149.857|
+135|61|O|174569.88|1995-10-21|4-NOT SPECIFIED|Clerk#000000804|0|l platelets use according t|61.1024|-149.853|61.1024|-149.853|
+160|83|O|86076.86|1996-12-19|4-NOT SPECIFIED|Clerk#000000342|0|thely special sauternes wake slyly of t|61.1891|-149.906|61.1891|-149.906|
+161|17|F|19056.99|1994-08-31|2-HIGH|Clerk#000000322|0|carefully! special instructions sin|61.1891|-149.906|61.1891|-149.906|
+162|16|O|2158.13|1995-05-08|3-MEDIUM|Clerk#000000378|0|nts hinder fluffily ironic instructions. express, express excuses |61.1891|-149.906|61.1891|-149.906|
+163|88|O|125170.86|1997-09-05|3-MEDIUM|Clerk#000000379|0|y final packages. final foxes since the quickly even|61.1891|-149.906|61.1891|-149.906|
+164|1|F|202660.52|1992-10-21|5-LOW|Clerk#000000209|0|cajole ironic courts. slyly final ideas are slyly. blithely final Tiresias sub|61.1891|-149.906|61.1891|-149.906|
+165|28|F|141824.23|1993-01-30|4-NOT SPECIFIED|Clerk#000000292|0|across the blithely regular accounts. bold|61.1891|-149.906|61.1891|-149.906|
+166|109|O|93335.60|1995-09-12|2-HIGH|Clerk#000000440|0|lets. ironic, bold asymptotes kindle|61.1891|-149.906|61.1891|-149.906|
+167|121|F|52982.23|1993-01-04|4-NOT SPECIFIED|Clerk#000000731|0|s nag furiously bold excuses. fluffily iron|61.1891|-149.906|61.1891|-149.906|
+192|83|O|133002.55|1997-11-25|5-LOW|Clerk#000000483|0|y unusual platelets among the final instructions integrate rut|61.1891|-149.906|61.1891|-149.906|
+193|80|F|48053.18|1993-08-08|1-URGENT|Clerk#000000025|0|the furiously final pin|61.1891|-149.906|61.1891|-149.906|
+194|62|F|114097.63|1992-04-05|3-MEDIUM|Clerk#000000352|0|egular requests haggle slyly regular, regular pinto beans. asymptote|61.1891|-149.906|61.1891|-149.906|
+195|136|F|120053.52|1993-12-28|3-MEDIUM|Clerk#000000216|0|old forges are furiously sheaves. slyly fi|61.1891|-149.906|61.1891|-149.906|
+196|65|F|33248.04|1993-03-17|2-HIGH|Clerk#000000988|0|beans boost at the foxes. silent foxes|61.1891|-149.906|61.1891|-149.906|
+197|34|P|100290.07|1995-04-07|2-HIGH|Clerk#000000969|0|solve quickly about the even braids. carefully express deposits affix care|61.1891|-149.906|61.1891|-149.906|
+198|112|O|125792.83|1998-01-02|4-NOT SPECIFIED|Clerk#000000331|0|its. carefully ironic requests sleep. furiously express fox|61.1891|-149.906|61.1891|-149.906|
+199|53|O|80592.44|1996-03-07|2-HIGH|Clerk#000000489|0|g theodolites. special packag|61.1891|-149.906|61.1891|-149.906|
+224|4|F|155680.60|1994-06-18|4-NOT SPECIFIED|Clerk#000000642|0|r the quickly thin courts. carefully|61.1891|-149.906|61.1891|-149.906|
+225|34|P|165890.47|1995-05-25|1-URGENT|Clerk#000000177|0|s. blithely ironic accounts wake quickly fluffily special acc|61.1891|-149.906|61.1891|-149.906|
+226|128|F|180119.22|1993-03-10|2-HIGH|Clerk#000000756|0|s are carefully at the blithely ironic acc|61.1891|-149.906|61.1891|-149.906|
+227|10|O|46076.46|1995-11-10|5-LOW|Clerk#000000919|0| express instructions. slyly regul|61.1891|-149.906|61.1891|-149.906|
+228|46|F|2638.98|1993-02-25|1-URGENT|Clerk#000000562|0|es was slyly among the regular foxes. blithely regular dependenci|61.1891|-149.906|61.1891|-149.906|
+229|112|F|142290.77|1993-12-29|1-URGENT|Clerk#000000628|0|he fluffily even instructions. furiously i|61.1891|-149.906|61.1891|-149.906|
+230|103|F|107231.60|1993-10-27|1-URGENT|Clerk#000000520|0|odolites. carefully quick requ|61.1891|-149.906|61.1891|-149.906|
+231|91|F|141554.06|1994-09-29|2-HIGH|Clerk#000000446|0| packages haggle slyly after the carefully ironic instruct|61.1891|-149.906|61.1891|-149.906|
+256|125|F|106315.25|1993-10-19|4-NOT SPECIFIED|Clerk#000000834|0|he fluffily final ideas might are final accounts. carefully f|61.1891|-149.906|61.1891|-149.906|
+257|124|O|7102.74|1998-03-28|3-MEDIUM|Clerk#000000680|0|ts against the sly warhorses cajole slyly accounts|61.1891|-149.906|61.1891|-149.906|
+258|43|F|186669.10|1993-12-29|1-URGENT|Clerk#000000167|0|dencies. blithely quick packages cajole. ruthlessly final accounts|61.1891|-149.906|61.1891|-149.906|
+259|44|F|75661.70|1993-09-29|4-NOT SPECIFIED|Clerk#000000601|0|ages doubt blithely against the final foxes. carefully express deposits dazzle|61.1891|-149.906|61.1891|-149.906|
+260|106|O|179292.14|1996-12-10|3-MEDIUM|Clerk#000000960|0|lently regular pinto beans sleep after the slyly e|61.1891|-149.906|61.1891|-149.906|
+261|47|F|201003.12|1993-06-29|3-MEDIUM|Clerk#000000310|0|ully fluffily brave instructions. furiousl|61.1891|-149.906|61.1891|-149.906|
+262|31|O|108443.84|1995-11-25|4-NOT SPECIFIED|Clerk#000000551|0|l packages. blithely final pinto beans use carefu|61.1891|-149.906|61.1891|-149.906|
+263|118|F|79782.56|1994-05-17|2-HIGH|Clerk#000000088|0| pending instructions. blithely un|61.1891|-149.906|61.1891|-149.906|
+288|8|O|163794.53|1997-02-21|1-URGENT|Clerk#000000109|0|uriously final requests. even, final ideas det|61.1891|-149.906|61.1891|-149.906|
+289|104|O|131092.67|1997-02-10|3-MEDIUM|Clerk#000000103|0|sily. slyly special excuse|61.1891|-149.906|61.1891|-149.906|
+290|118|F|62814.89|1994-01-01|4-NOT SPECIFIED|Clerk#000000735|0|efully dogged deposits. furiou|61.1891|-149.906|61.1891|-149.906|
+291|142|F|66817.05|1994-03-13|1-URGENT|Clerk#000000923|0|dolites. carefully regular pinto beans cajol|64.8541|-147.813|64.8541|-147.813|
+292|23|F|30783.05|1992-01-13|2-HIGH|Clerk#000000193|0|g pinto beans will have to sleep f|64.8414|-147.606|64.8414|-147.606|
+293|31|F|37248.78|1992-10-02|2-HIGH|Clerk#000000629|0|re bold, ironic deposits. platelets c|64.8371|-147.746|64.8371|-147.746|
+294|52|F|30059.47|1993-07-16|3-MEDIUM|Clerk#000000499|0|kly according to the frays. final dolphins affix quickly |64.8151|-147.707|64.8151|-147.707|
+295|19|F|89345.99|1994-09-29|2-HIGH|Clerk#000000155|0| unusual pinto beans play. regular ideas haggle|64.8371|-147.746|64.8371|-147.746|
+320|1|O|39835.54|1997-11-21|2-HIGH|Clerk#000000573|0|ar foxes nag blithely|64.849|-147.813|64.849|-147.813|
+321|124|F|62251.15|1993-03-21|3-MEDIUM|Clerk#000000289|0|equests run. blithely final dependencies after the deposits wake caref|64.8425|-147.724|64.8425|-147.724|
+322|134|F|127068.89|1992-03-19|1-URGENT|Clerk#000000158|0|fully across the slyly bold packages. packages against the quickly regular i|64.8425|-147.724|64.8425|-147.724|
+323|40|F|79683.42|1994-03-26|1-URGENT|Clerk#000000959|0|arefully pending foxes sleep blithely. slyly express accoun|64.849|-147.826|64.849|-147.826|
+324|106|F|26868.85|1992-03-20|1-URGENT|Clerk#000000352|0| about the ironic, regular deposits run blithely against the excuses|64.815|-147.882|64.815|-147.882|
+325|41|F|71543.41|1993-10-17|5-LOW|Clerk#000000844|0|ly sometimes pending pa|64.8906|-147.628|64.8906|-147.628|
+326|76|O|229165.17|1995-06-04|2-HIGH|Clerk#000000466|0| requests. furiously ironic asymptotes mold carefully alongside of the blit|64.8276|-147.639|64.8276|-147.639|
+327|145|P|24468.16|1995-04-17|5-LOW|Clerk#000000992|0|ng the slyly final courts. slyly even escapades eat |64.8461|-147.813|64.8461|-147.813|
+352|107|F|16003.86|1994-03-08|2-HIGH|Clerk#000000932|0|ke slyly bold pinto beans. blithely regular accounts against the spe|64.8281|-147.812|64.8281|-147.812|
+353|2|F|179984.42|1993-12-31|5-LOW|Clerk#000000449|0| quiet ideas sleep. even instructions cajole slyly. silently spe|64.8377|-147.718|64.8377|-147.718|
+354|139|O|157062.70|1996-03-14|2-HIGH|Clerk#000000511|0|ly regular ideas wake across the slyly silent ideas. final deposits eat b|64.8417|-147.718|64.8417|-147.718|
+355|71|F|69447.25|1994-06-14|5-LOW|Clerk#000000532|0|s. sometimes regular requests cajole. regular, pending accounts a|64.8145|-147.772|64.8145|-147.772|
+356|148|F|162786.67|1994-06-30|4-NOT SPECIFIED|Clerk#000000944|0|as wake along the bold accounts. even, |64.8541|-147.813|64.8541|-147.813|
+357|61|O|98723.11|1996-10-09|2-HIGH|Clerk#000000301|0|e blithely about the express, final accounts. quickl|64.8169|-147.779|64.8169|-147.779|
+358|4|F|226806.66|1993-09-20|2-HIGH|Clerk#000000392|0|l, silent instructions are slyly. silently even de|64.8378|-147.71|64.8378|-147.71|
+359|79|F|142891.22|1994-12-19|3-MEDIUM|Clerk#000000934|0|n dolphins. special courts above the carefully ironic requests use|64.8436|-147.722|64.8436|-147.722|
+384|115|F|122785.82|1992-03-03|5-LOW|Clerk#000000206|0|, even accounts use furiously packages. slyly ironic pla|64.9401|-147.402|64.9401|-147.402|
+385|34|O|50724.06|1996-03-22|5-LOW|Clerk#000000600|0|hless accounts unwind bold pain|64.8426|-147.719|64.8426|-147.719|
+386|61|F|90380.40|1995-01-25|2-HIGH|Clerk#000000648|0| haggle quickly. stealthily bold asymptotes haggle among the furiously even re|64.8534|-147.811|64.8534|-147.811|
+387|4|O|130647.18|1997-01-26|4-NOT SPECIFIED|Clerk#000000768|0| are carefully among the quickly even deposits. furiously silent req|64.9341|-147.928|64.9341|-147.928|
+388|46|F|120533.46|1992-12-16|4-NOT SPECIFIED|Clerk#000000356|0|ar foxes above the furiously ironic deposits nag slyly final reque|64.8393|-147.72|64.8393|-147.72|
+389|127|F|1984.14|1994-02-17|2-HIGH|Clerk#000000062|0|ing to the regular asymptotes. final, pending foxes about the blithely sil|64.8406|-147.731|64.8406|-147.731|
+390|103|O|168562.27|1998-04-07|5-LOW|Clerk#000000404|0|xpress asymptotes use among the regular, final pinto b|64.9281|-147.865|64.9281|-147.865|
+391|112|F|13282.23|1994-11-17|2-HIGH|Clerk#000000256|0|orges thrash fluffil|64.8371|-147.716|64.8371|-147.716|
+416|41|F|71362.50|1993-09-27|5-LOW|Clerk#000000294|0| the accounts. fluffily bold depo|64.9414|-147.841|64.9414|-147.841|
+417|55|F|91982.29|1994-02-06|3-MEDIUM|Clerk#000000468|0|ironic, even packages. thinly unusual accounts sleep along the slyly unusual |64.8363|-147.79|64.8363|-147.79|
+418|95|P|33124.96|1995-04-13|4-NOT SPECIFIED|Clerk#000000643|0|. furiously ironic instruc|64.8371|-147.716|64.8371|-147.716|
+419|118|O|111597.96|1996-10-01|3-MEDIUM|Clerk#000000376|0|osits. blithely pending theodolites boost carefully|64.8591|-147.917|64.8591|-147.917|
+420|91|O|198039.23|1995-10-31|4-NOT SPECIFIED|Clerk#000000756|0|leep carefully final excuses. fluffily pending requests unwind carefully above|64.8363|-147.79|64.8363|-147.79|
+421|40|F|1084.38|1992-02-22|5-LOW|Clerk#000000405|0|egular, even packages according to the final, un|55.3801|-131.682|55.3801|-131.682|
+422|74|O|106045.89|1997-05-31|4-NOT SPECIFIED|Clerk#000000049|0|aggle carefully across the accounts. regular accounts eat fluffi|55.3073|-131.528|55.3073|-131.528|
+423|104|O|26981.31|1996-06-01|1-URGENT|Clerk#000000674|0|quests. deposits cajole quickly. furiously bold accounts haggle q|55.3801|-131.682|55.3801|-131.682|
+448|149|O|114978.03|1995-08-21|3-MEDIUM|Clerk#000000597|0| regular, express foxes use blithely. quic|55.3601|-131.681|55.3601|-131.681|
+449|97|O|41605.63|1995-07-20|2-HIGH|Clerk#000000841|0|. furiously regular theodolites affix blithely |55.3279|-131.613|55.3279|-131.613|
+450|49|P|153386.61|1995-03-05|4-NOT SPECIFIED|Clerk#000000293|0|d theodolites. boldly bold foxes since the pack|55.3129|-131.588|55.3129|-131.588|
+451|100|O|104664.40|1998-05-25|5-LOW|Clerk#000000048|0|nic pinto beans. theodolites poach carefully; |55.3801|-131.682|55.3801|-131.682|
+452|61|O|2007.48|1997-10-14|1-URGENT|Clerk#000000498|0|t, unusual instructions above the blithely bold pint|55.3801|-131.682|55.3801|-131.682|
+453|46|O|216826.73|1997-05-26|5-LOW|Clerk#000000504|0|ss foxes. furiously regular ideas sleep according to t|55.4299|-131.789|55.4299|-131.789|
+454|49|O|23198.24|1995-12-27|5-LOW|Clerk#000000890|0|dolites sleep carefully blithely regular deposits. quickly regul|55.3801|-131.682|55.3801|-131.682|
+455|13|O|138010.76|1996-12-04|1-URGENT|Clerk#000000796|0| about the final platelets. dependen|55.3507|-131.671|55.3507|-131.671|
+480|73|F|20530.97|1993-05-08|5-LOW|Clerk#000000004|0|ealthy pinto beans. fluffily regular requests along the special sheaves wake |55.3801|-131.682|55.3801|-131.682|
+481|31|F|117827.18|1992-10-08|2-HIGH|Clerk#000000230|0|ly final ideas. packages haggle fluffily|55.3394|-131.636|55.3394|-131.636|
+482|127|O|136634.34|1996-03-26|1-URGENT|Clerk#000000295|0|ts. deposits wake: final acco|55.3801|-131.682|55.3801|-131.682|
+483|35|O|39793.05|1995-07-11|2-HIGH|Clerk#000000025|0|cross the carefully final e|55.3103|-131.582|55.3103|-131.582|
+484|55|O|219920.62|1997-01-03|3-MEDIUM|Clerk#000000545|0|grouches use. furiously bold accounts maintain. bold, regular deposits|55.3801|-131.682|55.3801|-131.682|
+485|101|O|110432.76|1997-03-26|2-HIGH|Clerk#000000105|0| regular ideas nag thinly furiously s|55.3801|-131.682|55.3801|-131.682|
+486|52|O|185968.15|1996-03-11|4-NOT SPECIFIED|Clerk#000000803|0|riously dolphins. fluffily ironic requ|55.3801|-131.682|55.3801|-131.682|
+487|109|F|48502.79|1992-08-18|1-URGENT|Clerk#000000086|0|ithely unusual courts eat accordi|55.3801|-131.682|55.3801|-131.682|
+512|64|P|124661.48|1995-05-20|5-LOW|Clerk#000000814|0|ding requests. carefully express theodolites was quickly. furious|55.3801|-131.682|55.3801|-131.682|
+513|61|O|63703.92|1995-05-01|2-HIGH|Clerk#000000522|0|regular packages. pinto beans cajole carefully against the even|55.3424|-131.634|55.3424|-131.634|
+514|76|O|104585.77|1996-04-04|2-HIGH|Clerk#000000094|0| cajole furiously. slyly final excuses cajole. slyly special instructions |55.4097|-131.729|55.4097|-131.729|
+515|142|F|153720.22|1993-08-29|4-NOT SPECIFIED|Clerk#000000700|0|eposits are furiously furiously silent pinto beans. pending pack|55.3801|-131.682|55.3801|-131.682|
+516|44|O|10677.86|1998-04-21|2-HIGH|Clerk#000000305|0|lar, unusual platelets are carefully. even courts sleep bold, final pinto bea|55.3801|-131.682|55.3801|-131.682|
+517|10|O|82197.79|1997-04-07|5-LOW|Clerk#000000359|0|slyly pending deposits cajole quickly packages. furiou|55.3462|-131.658|55.3462|-131.658|
+518|145|O|223537.09|1998-02-08|2-HIGH|Clerk#000000768|0| the carefully bold accounts. quickly regular excuses are|55.3801|-131.682|55.3801|-131.682|
+519|64|O|95731.50|1997-10-31|1-URGENT|Clerk#000000985|0|ains doze furiously against the f|55.3801|-131.682|55.3801|-131.682|
+544|94|F|47627.89|1993-02-17|2-HIGH|Clerk#000000145|0|the special, final accounts. dogged dolphins|55.3801|-131.682|55.3801|-131.682|
+545|64|O|23476.12|1995-11-07|2-HIGH|Clerk#000000537|0|as. blithely final hockey players about th|55.3801|-131.682|55.3801|-131.682|
+546|145|O|14790.37|1996-11-01|2-HIGH|Clerk#000000041|0|osits sleep. slyly special dolphins about the q|55.3801|-131.682|55.3801|-131.682|
+547|100|O|96855.29|1996-06-22|3-MEDIUM|Clerk#000000976|0|ing accounts eat. carefully regular packa|55.3801|-131.682|55.3801|-131.682|
+548|124|F|99088.75|1994-09-21|1-URGENT|Clerk#000000435|0|arefully express instru|55.3801|-131.682|55.3801|-131.682|
+549|110|F|141679.41|1992-07-13|1-URGENT|Clerk#000000196|0|ideas alongside of |55.3801|-131.682|55.3801|-131.682|
+550|25|O|33123.28|1995-08-02|1-URGENT|Clerk#000000204|0|t requests. blithely |61.5856|-149.316|61.5856|-149.316|
+551|91|O|46355.83|1995-05-30|1-URGENT|Clerk#000000179|0|xpress accounts boost quic|61.5781|-149.429|61.5781|-149.429|
+576|31|O|18307.45|1997-05-13|3-MEDIUM|Clerk#000000955|0|l requests affix regular requests. final account|61.6141|-149.457|61.6141|-149.457|
+577|56|F|34768.68|1994-12-19|5-LOW|Clerk#000000154|0| deposits engage stealthil|61.5801|-149.461|61.5801|-149.461|
+578|94|O|70392.02|1997-01-10|5-LOW|Clerk#000000281|0|e blithely even packages. slyly pending platelets bes|61.9071|-150.067|61.9071|-150.067|
+579|68|O|120828.12|1998-03-11|2-HIGH|Clerk#000000862|0| regular instructions. blithely even p|61.5928|-149.392|61.5928|-149.392|
+580|61|O|88219.12|1997-07-05|2-HIGH|Clerk#000000314|0|tegrate fluffily regular accou|61.6141|-149.457|61.6141|-149.457|
+581|70|O|126066.00|1997-02-23|4-NOT SPECIFIED|Clerk#000000239|0| requests. even requests use slyly. blithely ironic |61.5792|-149.36|61.5792|-149.36|
+582|50|O|129004.81|1997-10-21|1-URGENT|Clerk#000000378|0|n pinto beans print a|61.6049|-149.463|61.6049|-149.463|
+583|49|O|127817.38|1997-03-19|3-MEDIUM|Clerk#000000792|0|efully express requests. a|61.6099|-149.328|61.6099|-149.328|
+608|26|O|62567.99|1996-02-28|3-MEDIUM|Clerk#000000995|0|nic waters wake slyly slyly expre|61.5531|-149.651|61.5531|-149.651|
+609|127|F|21088.59|1994-06-01|3-MEDIUM|Clerk#000000348|0|- ironic gifts believe furiously ca|61.6141|-149.457|61.6141|-149.457|
+610|52|O|175142.28|1995-08-02|1-URGENT|Clerk#000000610|0|totes. ironic, unusual packag|61.6141|-149.457|61.6141|-149.457|
+611|106|F|73907.63|1993-01-27|1-URGENT|Clerk#000000401|0|ounts detect furiously ac|61.5531|-149.651|61.5531|-149.651|
+612|82|F|145695.42|1992-10-21|3-MEDIUM|Clerk#000000759|0|boost quickly quickly final excuses. final foxes use bravely afte|61.6141|-149.457|61.6141|-149.457|
+613|139|O|33396.35|1995-06-18|2-HIGH|Clerk#000000172|0|ts hinder among the deposits. fluffily ironic depos|61.7321|-150.12|61.7321|-150.12|
+614|134|F|218116.21|1992-12-01|2-HIGH|Clerk#000000388|0| deposits! even, daring theodol|61.6141|-149.457|61.6141|-149.457|
+615|67|F|32890.89|1992-05-09|5-LOW|Clerk#000000388|0|t to promise asymptotes. packages haggle alongside of the fluffil|61.582|-149.441|61.582|-149.441|
+640|97|F|145495.62|1993-01-23|2-HIGH|Clerk#000000433|0|r, unusual accounts boost carefully final ideas. slyly silent theod|61.5818|-149.44|61.5818|-149.44|
+641|133|F|120626.49|1993-08-30|5-LOW|Clerk#000000175|0|ents cajole furiously about the quickly silent pac|61.6141|-149.457|61.6141|-149.457|
+642|40|F|22994.51|1993-12-16|3-MEDIUM|Clerk#000000357|0| among the requests wake slyly alongside of th|61.7321|-150.12|61.7321|-150.12|
+643|58|P|180396.95|1995-03-25|2-HIGH|Clerk#000000354|0|g dependencies. regular accounts |61.6308|-149.415|61.6308|-149.415|
+644|8|F|201268.06|1992-05-01|1-URGENT|Clerk#000000550|0| blithely unusual platelets haggle ironic, special excuses. excuses unwi|61.5801|-149.461|61.5801|-149.461|
+645|115|F|234763.73|1994-12-03|2-HIGH|Clerk#000000090|0|quickly daring theodolites across the regu|61.5811|-149.444|61.5811|-149.444|
+646|52|F|142070.65|1994-11-22|2-HIGH|Clerk#000000203|0|carefully even foxes. fina|61.6521|-149.92|61.6521|-149.92|
+647|143|O|56449.23|1997-08-07|1-URGENT|Clerk#000000270|0|egular pearls. carefully express asymptotes are. even account|61.6141|-149.307|61.6141|-149.307|
+672|109|F|89877.09|1994-04-14|5-LOW|Clerk#000000106|0|egular requests are furiously according to |61.6168|-149.328|61.6168|-149.328|
+673|80|F|21137.08|1994-03-10|1-URGENT|Clerk#000000448|0| special pinto beans use quickly furiously even depende|61.5714|-149.381|61.5714|-149.381|
+674|34|F|27204.60|1992-08-29|5-LOW|Clerk#000000448|0|ully special deposits. furiously final warhorses affix carefully. fluffily f|61.6521|-149.92|61.6521|-149.92|
+675|13|O|125188.72|1997-07-31|2-HIGH|Clerk#000000168|0|ffily between the careful|61.5858|-149.376|61.5858|-149.376|
+676|38|O|163966.67|1996-12-13|2-HIGH|Clerk#000000248|0|the final deposits. special, pending|61.5822|-149.463|61.5822|-149.463|
+677|124|F|147915.68|1993-11-24|3-MEDIUM|Clerk#000000824|0|uriously special pinto beans cajole carefully. fi|61.5861|-149.303|61.5861|-149.303|
+678|131|F|135761.05|1993-02-27|5-LOW|Clerk#000000530|0|. blithely final somas about the|61.5821|-149.438|61.5821|-149.438|
+679|49|O|8945.03|1995-12-15|2-HIGH|Clerk#000000853|0|tealthy, final pinto beans haggle slyly. pending platelets about the special, |61.6281|-149.338|61.6281|-149.338|
+704|85|O|56210.26|1996-11-21|3-MEDIUM|Clerk#000000682|0|blithely pending platelets wake alongside of the final, iron|61.5771|-149.335|61.5771|-149.335|
+705|43|O|83773.49|1997-02-13|4-NOT SPECIFIED|Clerk#000000294|0|ithely regular dependencies. express, even packages sleep slyly pending t|61.5917|-149.464|61.5917|-149.464|
+706|148|O|23973.60|1995-09-09|1-URGENT|Clerk#000000448|0|g the packages. deposits caj|61.1927|-149.86|61.1927|-149.86|
+707|118|F|58218.35|1994-11-20|3-MEDIUM|Clerk#000000199|0| ideas about the silent, bold deposits nag dolphins|61.1879|-149.85|61.1879|-149.85|
+708|32|O|100445.59|1998-07-03|3-MEDIUM|Clerk#000000101|0|lphins cajole about t|61.1814|-149.849|61.1814|-149.849|
+709|37|O|72055.87|1998-04-21|1-URGENT|Clerk#000000461|0|ons alongside of the carefully bold pinto bea|61.2104|-149.892|61.2104|-149.892|
+710|133|F|208974.42|1993-01-02|5-LOW|Clerk#000000026|0| regular, regular requests boost. fluffily re|61.2093|-149.903|61.2093|-149.903|
+711|64|F|92484.70|1993-09-23|4-NOT SPECIFIED|Clerk#000000856|0|its. fluffily regular gifts are furi|61.1481|-149.829|61.1481|-149.829|
+736|47|O|130204.17|1998-06-21|5-LOW|Clerk#000000881|0|refully of the final pi|61.2161|-149.876|61.2161|-149.876|
+737|121|F|12984.85|1992-04-26|5-LOW|Clerk#000000233|0|ake blithely express, ironic theodolites. blithely special accounts wa|61.1972|-149.75|61.1972|-149.75|
+738|22|F|114145.18|1993-03-02|4-NOT SPECIFIED|Clerk#000000669|0|ly even foxes. furiously regular accounts cajole ca|61.2066|-149.887|61.2066|-149.887|
+739|1|O|159171.69|1998-05-31|5-LOW|Clerk#000000900|0| against the slyly ironic packages nag slyly ironic|61.2161|-149.876|61.2161|-149.876|
+740|44|O|83490.99|1995-07-16|3-MEDIUM|Clerk#000000583|0|courts haggle furiously across the final, regul|61.195|-149.834|61.195|-149.834|
+741|106|O|47985.98|1998-07-07|2-HIGH|Clerk#000000295|0|ic instructions. slyly express instructions solv|61.2038|-149.808|61.2038|-149.808|
+742|103|F|207632.55|1994-12-23|5-LOW|Clerk#000000543|0|equests? slyly ironic dolphins boost carefully above the blithely|61.1228|-149.862|61.1228|-149.862|
+743|79|O|23614.89|1996-10-04|4-NOT SPECIFIED|Clerk#000000933|0|eans. furiously ironic deposits sleep carefully carefully qui|61.2005|-149.785|61.2005|-149.785|
+768|98|O|220636.82|1996-08-20|3-MEDIUM|Clerk#000000411|0|jole slyly ironic packages. slyly even idea|61.181|-149.825|61.181|-149.825|
+769|80|F|43092.76|1993-06-02|3-MEDIUM|Clerk#000000172|0|ggle furiously. ironic packages haggle slyly. bold platelets affix s|61.1867|-149.919|61.1867|-149.919|
+770|32|O|64271.75|1998-05-23|5-LOW|Clerk#000000572|0|heodolites. furiously special pinto beans cajole pac|61.1955|-149.911|61.1955|-149.911|
+771|46|O|105302.05|1995-06-17|1-URGENT|Clerk#000000105|0|s. furiously final instructions across the deposit|61.1089|-149.858|61.1089|-149.858|
+772|97|F|128234.96|1993-04-17|2-HIGH|Clerk#000000430|0|s boost blithely fluffily idle ideas? fluffily even pin|61.1805|-149.889|61.1805|-149.889|
+773|133|F|146862.27|1993-09-26|3-MEDIUM|Clerk#000000307|0|tions are quickly accounts. accounts use bold, even pinto beans. gifts ag|61.1534|-149.985|61.1534|-149.985|
+774|80|O|145857.60|1995-12-04|1-URGENT|Clerk#000000883|0|tealthily even depths|61.1901|-149.911|61.1901|-149.911|
+775|134|F|59455.61|1995-03-18|1-URGENT|Clerk#000000191|0|kly express requests. fluffily silent accounts poach furiously|61.2122|-149.734|61.2122|-149.734|
+800|56|O|87892.38|1998-07-14|2-HIGH|Clerk#000000213|0|y alongside of the pending packages? final platelets nag fluffily carefu|61.1951|-149.906|61.1951|-149.906|
+801|118|F|127717.72|1992-02-18|1-URGENT|Clerk#000000186|0|iously from the furiously enticing reques|61.2043|-149.869|61.2043|-149.869|
+802|137|F|156381.95|1995-01-05|1-URGENT|Clerk#000000516|0|posits. ironic, pending requests cajole. even theodol|61.2036|-149.869|61.2036|-149.869|
+803|16|O|27629.66|1997-04-29|5-LOW|Clerk#000000260|0|ic instructions. even deposits haggle furiously at the deposits-- regular de|61.1883|-149.886|61.1883|-149.886|
+804|50|F|94400.43|1993-03-12|3-MEDIUM|Clerk#000000931|0|s. blithely final foxes are about the packag|61.2141|-149.864|61.2141|-149.864|
+805|127|O|90042.41|1995-07-05|4-NOT SPECIFIED|Clerk#000000856|0|y according to the fluffily |61.1955|-149.782|61.1955|-149.782|
+806|131|O|26839.16|1996-06-20|2-HIGH|Clerk#000000240|0| the ironic packages wake carefully fina|61.2183|-149.894|61.2183|-149.894|
+807|145|F|222392.53|1993-11-24|3-MEDIUM|Clerk#000000012|0|refully special tithes. blithely regular accoun|61.1417|-149.864|61.1417|-149.864|
+832|29|F|68494.08|1992-04-19|5-LOW|Clerk#000000495|0|xes. bravely regular packages sleep up the furiously bold accou|61.1883|-149.883|61.1883|-149.883|
+833|56|F|49033.69|1994-02-13|3-MEDIUM|Clerk#000000437|0|ts haggle quickly across the slyl|61.2161|-149.876|61.2161|-149.876|
+834|43|F|46459.92|1994-05-23|3-MEDIUM|Clerk#000000805|0| sleep. quickly even foxes are boldly. slyly express requests use slyly|61.2193|-149.869|61.2193|-149.869|
+835|65|O|62430.67|1995-10-08|4-NOT SPECIFIED|Clerk#000000416|0|s about the carefully special foxes haggle quickly about the|61.2191|-149.888|61.2191|-149.888|
+836|70|O|72843.48|1996-11-25|4-NOT SPECIFIED|Clerk#000000729|0|ely bold excuses sleep regular ideas. furiously unusual ideas wake furiou|61.2191|-149.888|61.2191|-149.888|
+837|116|F|60918.41|1994-06-15|4-NOT SPECIFIED|Clerk#000000563|0|kages sleep slyly above the ironic, final orbits|61.2191|-149.888|61.2191|-149.888|
+838|17|O|82918.36|1998-01-29|5-LOW|Clerk#000000213|0| slyly around the slyly even|61.2191|-149.888|61.2191|-149.888|
+839|28|O|70182.63|1995-08-08|1-URGENT|Clerk#000000951|0|the carefully even platelets. furiously unusual fo|61.2191|-149.888|61.2191|-149.888|
+864|139|O|74710.74|1997-08-17|1-URGENT|Clerk#000000036|0|ly after the slyly regular deposits. express, regular asymptotes nag ca|61.2191|-149.888|61.2191|-149.888|
+865|4|F|70430.54|1993-05-04|3-MEDIUM|Clerk#000000337|0|. special packages wake after the carefully final accounts. express pinto be|61.2191|-149.888|61.2191|-149.888|
+866|40|F|4766.19|1992-11-28|3-MEDIUM|Clerk#000000718|0|ins after the even, even accounts nod blithel|61.2191|-149.888|61.2191|-149.888|
+867|26|F|7471.75|1993-11-16|3-MEDIUM|Clerk#000000877|0|pades nag quickly final, |61.2191|-149.888|61.2191|-149.888|
+868|104|F|127345.45|1992-06-09|4-NOT SPECIFIED|Clerk#000000782|0|onic theodolites print carefully. blithely dogge|61.2191|-149.888|61.2191|-149.888|
+869|136|O|58932.19|1997-01-12|2-HIGH|Clerk#000000245|0|ar sheaves are slowly. slyly even attainments boost theodolites. furiously|61.2191|-149.888|61.2191|-149.888|
+870|34|F|40492.37|1993-06-20|4-NOT SPECIFIED|Clerk#000000123|0|blithely ironic ideas nod. sly, r|61.2191|-149.888|61.2191|-149.888|
+871|16|O|172861.58|1995-11-15|5-LOW|Clerk#000000882|0|oss the ironic theodolites.|61.1891|-149.906|61.1891|-149.906|
+896|2|F|169847.63|1993-03-09|1-URGENT|Clerk#000000187|0|inal packages eat blithely according to the warhorses. furiously quiet de|61.2191|-149.888|61.2191|-149.888|
+897|49|P|57697.44|1995-03-20|1-URGENT|Clerk#000000316|0| wake quickly against |61.2191|-149.888|61.2191|-149.888|
+898|55|F|101020.75|1993-06-03|2-HIGH|Clerk#000000611|0|. unusual pinto beans haggle quickly across |61.1101|-149.857|61.1101|-149.857|
+899|109|O|125562.09|1998-04-08|5-LOW|Clerk#000000575|0|rts engage carefully final theodolites.|61.1101|-149.857|61.1101|-149.857|
+900|46|F|120073.51|1994-10-01|4-NOT SPECIFIED|Clerk#000000060|0| fluffily express deposits nag furiousl|61.1101|-149.857|61.1101|-149.857|
+901|13|O|81826.12|1998-07-21|4-NOT SPECIFIED|Clerk#000000929|0|lyly even foxes are furious, silent requests. requests about the quickly |61.1101|-149.857|61.1101|-149.857|
+902|10|F|37348.62|1994-07-27|4-NOT SPECIFIED|Clerk#000000811|0|yly final requests over the furiously regula|61.1101|-149.857|61.1101|-149.857|
+903|11|O|109351.87|1995-07-07|4-NOT SPECIFIED|Clerk#000000793|0|e slyly about the final pl|61.1101|-149.857|61.1101|-149.857|
+928|67|F|228136.49|1995-03-02|5-LOW|Clerk#000000450|0|ithely express pinto beans. |61.1101|-149.857|61.1101|-149.857|
+929|83|F|109301.02|1992-10-02|2-HIGH|Clerk#000000160|0|its. furiously even foxes affix carefully finally silent accounts. express req|61.1101|-149.857|61.1101|-149.857|
+930|131|F|199102.23|1994-12-17|1-URGENT|Clerk#000000004|0| accounts nag slyly. ironic, ironic accounts wake blithel|61.1101|-149.857|61.1101|-149.857|
+931|103|F|117909.23|1992-12-07|1-URGENT|Clerk#000000881|0|ss packages haggle furiously express, regular deposits. even, e|61.1101|-149.857|61.1101|-149.857|
+932|41|O|40234.50|1997-05-16|2-HIGH|Clerk#000000218|0|ly express instructions boost furiously reg|61.1101|-149.857|61.1101|-149.857|
+933|97|F|71349.30|1992-08-05|4-NOT SPECIFIED|Clerk#000000752|0|ial courts wake permanently against the furiously regular ideas. unusual |61.1101|-149.857|61.1101|-149.857|
+934|52|O|17213.59|1996-07-03|1-URGENT|Clerk#000000229|0|ts integrate carefully. sly, regular deposits af|61.1101|-149.857|61.1101|-149.857|
+935|50|O|97733.87|1997-09-24|5-LOW|Clerk#000000180|0|iously final deposits cajole. blithely even packages |61.1101|-149.857|61.1101|-149.857|
+960|35|F|63537.13|1994-09-21|3-MEDIUM|Clerk#000000120|0|regular accounts. requests|61.1101|-149.857|61.1101|-149.857|
+961|56|P|158893.16|1995-06-04|4-NOT SPECIFIED|Clerk#000000720|0|ons nag furiously among the quickl|61.1101|-149.857|61.1101|-149.857|
+962|37|F|98258.73|1994-05-06|5-LOW|Clerk#000000463|0|ments nag deposits. fluffily ironic a|61.1101|-149.857|61.1101|-149.857|
+963|26|F|53287.25|1994-05-26|3-MEDIUM|Clerk#000000497|0|uses haggle carefully. slyly even dependencies after the packages ha|61.1101|-149.857|61.1101|-149.857|
+964|76|O|131146.47|1995-05-20|3-MEDIUM|Clerk#000000657|0|print blithely ironic, careful theodolit|61.1101|-149.857|61.1101|-149.857|
+965|70|P|41758.44|1995-05-15|5-LOW|Clerk#000000218|0|iously special packages. slyly pending requests are carefully |64.8591|-147.917|64.8591|-147.917|
+966|14|O|120516.93|1998-04-30|2-HIGH|Clerk#000000239|0|special deposits. furious|64.8273|-147.715|64.8273|-147.715|
+967|110|F|179287.95|1992-06-21|3-MEDIUM|Clerk#000000167|0|excuses engage quickly bold dep|64.8281|-147.715|64.8281|-147.715|
+992|55|O|133665.12|1997-11-11|3-MEDIUM|Clerk#000000875|0|ts. regular pinto beans thrash carefully sl|64.8552|-147.763|64.8552|-147.763|
+993|80|O|198238.65|1995-09-10|3-MEDIUM|Clerk#000000894|0|quickly express accounts among the furiously bol|64.8481|-147.684|64.8481|-147.684|
+994|2|F|41433.48|1994-04-20|5-LOW|Clerk#000000497|0|ole. slyly bold excuses nag caref|64.8522|-147.773|64.8522|-147.773|
+995|116|P|135157.92|1995-05-31|3-MEDIUM|Clerk#000000439|0|deas. blithely final deposits play. express accounts wake blithely caref|64.8467|-147.703|64.8467|-147.703|
+996|71|O|47447.63|1997-12-29|1-URGENT|Clerk#000000497|0|arefully final packages into the slyly final requests affix blit|64.8963|-147.662|64.8963|-147.662|
+997|109|O|27561.82|1997-05-19|2-HIGH|Clerk#000000651|0|ly express depths. furiously final requests haggle furiously. carefu|64.8372|-147.796|64.8372|-147.796|
+998|32|F|65269.38|1994-11-26|4-NOT SPECIFIED|Clerk#000000956|0|ronic dolphins. ironic, bold ideas haggle furiously furious|64.8312|-147.716|64.8312|-147.716|
+999|61|F|145249.13|1993-09-05|5-LOW|Clerk#000000464|0|pitaphs sleep. regular accounts use. f|64.811|-147.71|64.811|-147.71|
+1024|4|O|176084.63|1997-12-23|5-LOW|Clerk#000000903|0| blithely. even, express theodolites cajole slyly across|64.8971|-147.663|64.8971|-147.663|
+1025|103|F|82034.03|1995-05-05|2-HIGH|Clerk#000000376|0|ross the slyly final pa|64.85|-147.699|64.85|-147.699|
+1026|73|O|36464.76|1997-06-04|5-LOW|Clerk#000000223|0|s wake blithely. special acco|64.8389|-147.743|64.8389|-147.743|
+1027|128|F|112770.89|1992-06-03|3-MEDIUM|Clerk#000000241|0|equests cajole. slyly final pinto bean|64.781|-148|64.781|-148|
+1028|70|F|153864.67|1994-01-01|2-HIGH|Clerk#000000131|0|ts are. final, silent deposits are among the fl|64.8377|-147.718|64.8377|-147.718|
+1029|130|F|47440.91|1994-06-21|2-HIGH|Clerk#000000700|0|quests sleep. slyly even foxes wake quickly final theodolites. clo|64.8248|-147.886|64.8248|-147.886|
+1030|134|F|16346.94|1994-06-15|5-LOW|Clerk#000000422|0|ully ironic accounts sleep carefully. requests are carefully alongside of the |64.818|-147.679|64.818|-147.679|
+1031|4|F|128024.71|1994-09-01|3-MEDIUM|Clerk#000000448|0|s; ironic theodolites along the carefully ex|64.8271|-147.79|64.8271|-147.79|
+1056|28|F|38446.39|1995-02-11|1-URGENT|Clerk#000000125|0|t, even deposits hang about the slyly special i|64.8451|-147.812|64.8451|-147.812|
+1057|76|F|108107.42|1992-02-20|1-URGENT|Clerk#000000124|0|cuses dazzle carefully careful, ironic pinto beans. carefully even theod|64.8311|-147.729|64.8311|-147.729|
+1058|53|F|89359.11|1993-04-26|3-MEDIUM|Clerk#000000373|0|kly pending courts haggle. blithely regular sheaves integrate carefully fi|64.8454|-147.855|64.8454|-147.855|
+1059|127|F|198360.22|1994-02-27|1-URGENT|Clerk#000000104|0|en accounts. carefully bold packages cajole daringly special depende|64.8302|-147.744|64.8302|-147.744|
+1060|140|F|121994.04|1993-02-21|3-MEDIUM|Clerk#000000989|0|l platelets sleep quickly slyly special requests. furiously |64.8113|-147.91|64.8113|-147.91|
+1061|103|O|166947.75|1998-05-15|5-LOW|Clerk#000000576|0|uests sleep at the packages. fur|64.8271|-147.789|64.8271|-147.789|
+1062|106|O|39805.04|1997-01-15|1-URGENT|Clerk#000000152|0|eposits use blithely |64.8451|-147.698|64.8451|-147.698|
+1063|37|F|41392.31|1994-04-02|2-HIGH|Clerk#000000024|0|deposits nag quickly regular deposits. quickl|64.8586|-147.69|64.8586|-147.69|
+1088|148|F|47120.41|1992-05-21|5-LOW|Clerk#000000347|0|counts are blithely. platelets print. carefully |64.8507|-147.702|64.8507|-147.702|
+1089|49|O|103192.74|1996-05-04|4-NOT SPECIFIED|Clerk#000000226|0|ns haggle ruthlessly. even requests are quickly abov|64.8371|-147.716|64.8371|-147.716|
+1090|19|O|32929.30|1997-11-15|2-HIGH|Clerk#000000300|0| furiously regular platelets haggle along the slyly unusual foxes! |64.8449|-147.743|64.8449|-147.743|
+1091|83|O|35795.22|1996-08-27|1-URGENT|Clerk#000000549|0| even pinto beans haggle quickly alongside of the eve|64.8475|-147.706|64.8475|-147.706|
+1092|124|P|85552.21|1995-03-04|3-MEDIUM|Clerk#000000006|0|re quickly along the blithe|64.8452|-147.714|64.8452|-147.714|
+1093|101|O|79189.58|1997-07-31|4-NOT SPECIFIED|Clerk#000000159|0| after the carefully ironic requests. carefully ironic packages wake fluffil|64.8125|-147.787|64.8125|-147.787|
+1094|145|O|9006.25|1997-12-24|3-MEDIUM|Clerk#000000570|0|beans affix furiously about the pending, even deposits. finally pendi|55.3801|-131.682|55.3801|-131.682|
+1095|145|O|178491.24|1995-08-22|3-MEDIUM|Clerk#000000709|0|sly bold requests cajole carefully according to|55.3801|-131.682|55.3801|-131.682|
+1120|140|O|107958.62|1997-11-07|3-MEDIUM|Clerk#000000319|0|lly special requests. slyly pending platelets are quickly pending requ|55.3801|-131.682|55.3801|-131.682|
+1121|29|O|241837.88|1997-01-13|3-MEDIUM|Clerk#000000541|0|r escapades. deposits above the fluffily bold requests hag|55.3801|-131.682|55.3801|-131.682|
+1122|121|O|179747.47|1997-01-10|1-URGENT|Clerk#000000083|0|uffily carefully final theodolites. furiously express packages affix|55.3801|-131.682|55.3801|-131.682|
+1123|73|O|93259.93|1996-08-03|3-MEDIUM|Clerk#000000929|0|uriously pending requests. slyly regular instruction|55.3801|-131.682|55.3801|-131.682|
+1124|80|O|141858.97|1998-07-30|5-LOW|Clerk#000000326|0|regular pinto beans along the fluffily silent packages|55.3599|-131.687|55.3599|-131.687|
+1125|25|F|80438.38|1994-10-27|2-HIGH|Clerk#000000510|0|ithely final requests. i|55.4381|-131.803|55.4381|-131.803|
+1126|145|O|59982.31|1998-01-28|4-NOT SPECIFIED|Clerk#000000928|0|d slyly regular ideas: special ideas believe slyly. slyly ironic sheaves w|55.3751|-131.718|55.3751|-131.718|
+1127|58|O|103320.91|1995-09-19|4-NOT SPECIFIED|Clerk#000000397|0|usly silent, regular pinto beans. blithely express requests boos|55.3421|-131.641|55.3421|-131.641|
+1152|49|F|51775.54|1994-08-14|4-NOT SPECIFIED|Clerk#000000496|0|equests. deposits ab|55.3408|-131.64|55.3408|-131.64|
+1153|121|O|220727.97|1996-04-18|5-LOW|Clerk#000000059|0| across the pending deposi|55.2978|-131.534|55.2978|-131.534|
+1154|37|F|192417.85|1992-02-15|1-URGENT|Clerk#000000268|0|old asymptotes are special requests. blithely even deposits sleep furiously|55.3801|-131.682|55.3801|-131.682|
+1155|149|O|126902.81|1997-10-06|2-HIGH|Clerk#000000164|0|c deposits haggle among the ironic, even requests. carefully ironic sheaves n|55.3801|-131.682|55.3801|-131.682|
+1156|133|O|217682.81|1996-10-19|1-URGENT|Clerk#000000200|0| blithely ironic dolphins. furiously pendi|55.3421|-131.622|55.3421|-131.622|
+1157|97|O|85394.06|1998-01-14|4-NOT SPECIFIED|Clerk#000000207|0|out the regular excuses boost carefully against the furio|55.3801|-131.682|55.3801|-131.682|
+1158|142|O|31075.51|1996-06-30|2-HIGH|Clerk#000000549|0|integrate slyly furiously ironic deposit|55.3801|-131.682|55.3801|-131.682|
+1159|70|F|55553.68|1992-09-18|3-MEDIUM|Clerk#000000992|0|ts may sleep. requests according to the|55.3801|-131.682|55.3801|-131.682|
+1184|89|O|39700.29|1997-10-26|5-LOW|Clerk#000000777|0|iously even packages haggle fluffily care|55.3267|-131.523|55.3267|-131.523|
+1185|74|F|47033.21|1992-08-24|5-LOW|Clerk#000000344|0| even escapades are. package|55.3522|-131.685|55.3522|-131.685|
+1186|59|O|82026.18|1996-08-15|4-NOT SPECIFIED|Clerk#000000798|0|ingly regular pinto beans: instructi|55.5351|-133.014|55.5351|-133.014|
+1187|134|F|85948.02|1992-11-20|3-MEDIUM|Clerk#000000047|0|s after the furiously final deposits boost slyly under the|55.5351|-133.014|55.5351|-133.014|
+1188|20|O|54655.07|1996-04-11|2-HIGH|Clerk#000000256|0|ully ironic deposits. slyl|55.5351|-133.014|55.5351|-133.014|
+1189|46|F|71017.99|1994-04-09|1-URGENT|Clerk#000000243|0|f the even accounts. courts print blithely ironic accounts. sile|55.5351|-133.014|55.5351|-133.014|
+1190|13|O|31043.39|1997-03-16|5-LOW|Clerk#000000575|0|ccounts above the foxes integrate carefully after the |55.5351|-133.014|55.5351|-133.014|
+1191|112|O|28623.04|1995-11-07|3-MEDIUM|Clerk#000000011|0|uests nag furiously. carefully even requests|55.4691|-132.855|55.4691|-132.855|
+1216|122|F|68056.57|1992-12-07|5-LOW|Clerk#000000918|0|nal foxes around the e|55.5511|-133.081|55.5511|-133.081|
+1217|7|F|40982.08|1992-04-26|4-NOT SPECIFIED|Clerk#000000538|0| foxes nag quickly. ironic excuses nod. blithely pending|55.5351|-133.014|55.5351|-133.014|
+1218|10|F|99834.47|1994-06-20|4-NOT SPECIFIED|Clerk#000000994|0|s cajole. special, silent deposits about the theo|55.5531|-133.097|55.5531|-133.097|
+1219|28|O|10163.56|1995-10-05|3-MEDIUM|Clerk#000000800|0|od carefully. slyly final dependencies across the even fray|55.5351|-133.014|55.5351|-133.014|
+1220|49|O|122157.14|1996-08-29|1-URGENT|Clerk#000000712|0|inal theodolites wake. fluffily ironic asymptotes cajol|55.4726|-131.793|55.4726|-131.793|
+1221|14|F|117397.16|1992-04-19|4-NOT SPECIFIED|Clerk#000000852|0| detect against the silent, even deposits. carefully ironic|55.3801|-131.682|55.3801|-131.682|
+1222|10|F|47623.94|1993-02-05|3-MEDIUM|Clerk#000000811|0|theodolites use quickly even accounts. carefully final asympto|55.3801|-131.682|55.3801|-131.682|
+1223|10|O|26714.67|1996-05-25|4-NOT SPECIFIED|Clerk#000000238|0|posits was blithely fr|55.3801|-131.682|55.3801|-131.682|
+1248|49|F|210713.88|1992-01-02|1-URGENT|Clerk#000000890|0|t the carefully regular dugouts. s|61.5745|-149.562|61.5745|-149.562|
+1249|149|F|45889.09|1994-01-05|1-URGENT|Clerk#000000095|0|al ideas sleep above the pending pin|61.7321|-150.12|61.7321|-150.12|
+1250|37|F|12907.62|1992-09-29|4-NOT SPECIFIED|Clerk#000000652|0|ts after the fluffily pending instructions use slyly about the s|61.5421|-149.419|61.5421|-149.419|
+1251|38|O|109536.55|1997-10-30|1-URGENT|Clerk#000000276|0|, brave sauternes. deposits boost fluffily.|61.5722|-149.702|61.5722|-149.702|
+1252|149|O|93403.05|1997-08-04|5-LOW|Clerk#000000348|0|ng the slyly regular excuses. special courts nag furiously blithely e|61.5743|-149.405|61.5743|-149.405|
+1253|115|F|92730.74|1993-01-26|1-URGENT|Clerk#000000775|0| requests sleep furiously even foxes. ruthless packag|61.578|-149.441|61.578|-149.441|
+1254|70|O|94649.25|1995-12-22|1-URGENT|Clerk#000000607|0| pinto beans. carefully regular request|61.5826|-149.427|61.5826|-149.427|
+1255|122|F|62518.31|1994-05-30|4-NOT SPECIFIED|Clerk#000000798|0|ct slyly regular accounts. quick|61.5586|-149.351|61.5586|-149.351|
+1280|97|F|91664.85|1993-01-11|5-LOW|Clerk#000000160|0|posits thrash quickly after the theodolites. furiously iro|61.5844|-149.442|61.5844|-149.442|
+1281|62|F|165454.51|1994-12-11|1-URGENT|Clerk#000000430|0|counts. carefully pending accounts eat |61.5817|-149.472|61.5817|-149.472|
+1282|116|F|61297.42|1992-02-29|4-NOT SPECIFIED|Clerk#000000168|0|he quickly special packages. furiously final re|61.6141|-149.457|61.6141|-149.457|
+1283|118|O|202623.92|1996-08-30|4-NOT SPECIFIED|Clerk#000000260|0| pinto beans boost slyly ac|61.5761|-149.602|61.5761|-149.602|
+1284|134|O|106122.38|1996-01-07|2-HIGH|Clerk#000000492|0|s. blithely silent deposits s|61.6141|-149.457|61.6141|-149.457|
+1285|11|F|139124.72|1992-06-01|1-URGENT|Clerk#000000423|0|cial deposits cajole after the ironic requests. p|61.58|-149.434|61.58|-149.434|
+1286|109|F|207291.83|1993-05-14|4-NOT SPECIFIED|Clerk#000000939|0| deposits use carefully from the excuses. slyly bold p|61.6002|-149.429|61.6002|-149.429|
+1287|19|F|131432.42|1994-07-05|2-HIGH|Clerk#000000288|0|ly ironic dolphins integrate furiously among the final packages. st|61.569|-149.347|61.569|-149.347|
+1312|112|F|58111.00|1994-05-19|3-MEDIUM|Clerk#000000538|0|n, express accounts across the ironic|61.5812|-149.448|61.5812|-149.448|
+1313|148|F|46598.65|1994-09-13|1-URGENT|Clerk#000000774|0|ld accounts. regular deposits cajole. ironically pending theodolites use car|61.6141|-149.457|61.6141|-149.457|
+1314|143|F|56207.66|1994-05-13|3-MEDIUM|Clerk#000000485|0|ickly blithe packages nod ideas. furiously bold braids boost around the car|61.6141|-149.457|61.6141|-149.457|
+1315|22|O|121935.23|1998-03-22|5-LOW|Clerk#000000840|0|final theodolites alongside of the carefu|61.6141|-149.457|61.6141|-149.457|
+1316|16|F|163746.47|1993-12-03|1-URGENT|Clerk#000000857|0|ully bold theodolites? pending, bold pin|61.5969|-149.367|61.5969|-149.367|
+1317|100|P|139714.71|1995-05-19|2-HIGH|Clerk#000000373|0|sts. furiously special deposits lose fur|61.58|-149.4|61.58|-149.4|
+1318|128|O|81663.65|1998-06-27|3-MEDIUM|Clerk#000000581|0|s hang bold requests. pending, re|61.5848|-149.445|61.5848|-149.445|
+1319|32|O|31103.83|1996-09-27|2-HIGH|Clerk#000000257|0|y across the ruthlessly ironic accounts. unusu|61.5811|-149.444|61.5811|-149.444|
+1344|17|F|43809.37|1992-04-16|5-LOW|Clerk#000000178|0|omise close, silent requests. pending theodolites boost pending |61.5733|-149.389|61.5733|-149.389|
+1345|95|F|111207.93|1992-10-28|5-LOW|Clerk#000000447|0| regular tithes. quickly fluffy de|61.6141|-149.457|61.6141|-149.457|
+1346|76|F|171975.62|1992-06-18|2-HIGH|Clerk#000000374|0|ges sleep quickly-- even pint|61.5952|-149.436|61.5952|-149.436|
+1347|41|O|173444.60|1997-06-20|5-LOW|Clerk#000000977|0|he furiously even foxes use carefully express req|61.5421|-149.419|61.5421|-149.419|
+1348|19|O|94135.77|1998-04-18|5-LOW|Clerk#000000206|0|tly. quickly even deposi|61.5783|-149.362|61.5783|-149.362|
+1349|64|O|46376.09|1997-10-26|1-URGENT|Clerk#000000543|0|yly! blithely special theodolites cajole. unusual, reg|61.7321|-150.12|61.7321|-150.12|
+1350|52|F|49305.98|1993-08-24|1-URGENT|Clerk#000000635|0|iously about the blithely special a|61.5691|-149.328|61.5691|-149.328|
+1351|106|O|24637.96|1998-04-20|1-URGENT|Clerk#000000012|0| cajole. regular, special re|61.6141|-149.457|61.6141|-149.457|
+1376|47|O|23984.88|1997-05-04|4-NOT SPECIFIED|Clerk#000000730|0|der furiously final, final frets. carefull|61.5819|-149.3|61.5819|-149.3|
+1377|20|O|108334.30|1998-04-24|4-NOT SPECIFIED|Clerk#000000625|0|lly across the blithely express accounts. ironic excuses promise carefully de|61.6431|-149.289|61.6431|-149.289|
+1378|20|O|118495.12|1996-03-09|4-NOT SPECIFIED|Clerk#000000705|0| furiously even tithes cajole slyly among the quick|61.6431|-149.292|61.6431|-149.292|
+1379|65|O|84627.76|1998-05-25|5-LOW|Clerk#000000861|0|y deposits are caref|61.6228|-149.313|61.6228|-149.313|
+1380|137|O|94969.41|1996-07-07|3-MEDIUM|Clerk#000000969|0|inal deposits wake slyly daringly even requests. bold, even foxe|61.2125|-149.894|61.2125|-149.894|
+1381|127|O|58212.22|1998-05-25|3-MEDIUM|Clerk#000000107|0|even requests breach after the bold, ironic instructions. slyly even|61.1879|-149.886|61.1879|-149.886|
+1382|133|F|173522.71|1993-08-17|5-LOW|Clerk#000000241|0|fully final packages sl|61.1594|-149.835|61.1594|-149.835|
+1383|121|F|34797.72|1993-04-27|2-HIGH|Clerk#000000785|0|ts. express requests sleep blithel|61.2123|-149.854|61.2123|-149.854|
+1408|55|O|183965.61|1997-12-26|4-NOT SPECIFIED|Clerk#000000942|0|t the quickly final asymptotes. unusual|61.1951|-149.945|61.1951|-149.945|
+1409|143|F|72440.52|1992-12-31|4-NOT SPECIFIED|Clerk#000000065|0|ructions. furiously unusual excuses are regular, unusual theodolites. fin|61.2138|-149.856|61.2138|-149.856|
+1410|113|O|114879.19|1997-04-12|5-LOW|Clerk#000000123|0|iously along the bravely regular dolphins. pinto beans cajole furiously sp|61.1255|-149.864|61.1255|-149.864|
+1411|95|F|164462.61|1994-12-21|2-HIGH|Clerk#000000566|0|s. furiously special excuses across the pending pinto beans haggle sp|61.2066|-149.808|61.2066|-149.808|
+1412|53|F|78676.54|1993-03-13|4-NOT SPECIFIED|Clerk#000000083|0|uffily daring theodolit|61.2138|-149.896|61.2138|-149.896|
+1413|91|O|75733.58|1997-06-14|3-MEDIUM|Clerk#000000342|0|, ironic instructions. carefully even packages dazzle|61.2161|-149.876|61.2161|-149.876|
+1414|77|O|38057.81|1995-08-16|1-URGENT|Clerk#000000883|0|ccounts. ironic foxes haggle car|61.1594|-149.888|61.1594|-149.888|
+1415|79|F|24654.79|1994-05-29|4-NOT SPECIFIED|Clerk#000000601|0|rays. blithely final ideas affix quickl|61.1806|-149.775|61.1806|-149.775|
+1440|98|O|50201.16|1995-08-10|5-LOW|Clerk#000000956|0| pending requests. closely s|61.1101|-149.857|61.1101|-149.857|
+1441|122|O|156477.94|1997-03-06|4-NOT SPECIFIED|Clerk#000000156|0|ter the excuses. ironic dependencies m|61.1541|-149.958|61.1541|-149.958|
+1442|112|F|7108.12|1994-07-05|4-NOT SPECIFIED|Clerk#000000935|0|nal pinto beans. slyly ironic ideas cajol|61.1268|-149.947|61.1268|-149.947|
+1443|44|O|44672.03|1996-12-16|5-LOW|Clerk#000000185|0|x blithely against the carefully final somas. even asymptotes are. quickly spe|61.0931|-149.785|61.0931|-149.785|
+1444|134|F|207907.60|1994-12-06|3-MEDIUM|Clerk#000000783|0|ove the bold accounts cajole fluffily about|61.1901|-149.892|61.1901|-149.892|
+1445|115|F|154653.32|1995-01-10|3-MEDIUM|Clerk#000000211|0|even packages wake fluffily |61.2183|-149.889|61.2183|-149.889|
+1446|41|O|27663.16|1998-02-16|5-LOW|Clerk#000000274|0|lly regular notornis above the requests sleep final accounts! |61.2164|-149.882|61.2164|-149.882|
+1447|91|F|108171.38|1992-10-15|2-HIGH|Clerk#000000880|0|inly against the blithely pending excuses. regular, pe|61.2161|-149.876|61.2161|-149.876|
+1472|149|O|65331.05|1996-10-06|5-LOW|Clerk#000000303|0|y special dolphins around the final dependencies wake quick|61.219|-149.792|61.219|-149.792|
+1473|94|O|80624.38|1997-03-17|3-MEDIUM|Clerk#000000960|0|furiously close accoun|61.2188|-149.892|61.2188|-149.892|
+1474|70|F|51697.18|1995-01-09|1-URGENT|Clerk#000000438|0|detect quickly above the carefully even |61.2143|-149.837|61.2143|-149.837|
+1475|5|O|185496.66|1997-11-12|2-HIGH|Clerk#000000972|0|cally final packages boost. blithely ironic packa|61.1608|-149.835|61.1608|-149.835|
+1476|145|O|18795.62|1996-06-27|2-HIGH|Clerk#000000673|0|ding accounts hinder alongside of the quickly pending requests. fluf|61.1886|-149.944|61.1886|-149.944|
+1477|76|O|231831.35|1997-08-24|5-LOW|Clerk#000000612|0|ly bold foxes. final ideas would cajo|61.1201|-149.89|61.1201|-149.89|
+1478|50|O|20791.50|1997-08-03|2-HIGH|Clerk#000000827|0|lessly. carefully express|61.1201|-149.89|61.1201|-149.89|
+1479|16|O|31471.04|1995-12-16|4-NOT SPECIFIED|Clerk#000000697|0|he furiously even foxes. thinly bold deposits|61.1585|-149.872|61.1585|-149.872|
+1504|2|F|89399.40|1992-08-28|3-MEDIUM|Clerk#000000381|0|, brave deposits. bold de|61.195|-149.892|61.195|-149.892|
+1505|37|F|55892.35|1992-08-21|2-HIGH|Clerk#000000544|0|s. slyly ironic packages cajole. carefully regular packages haggle |61.0895|-149.694|61.0895|-149.694|
+1506|148|F|195844.84|1992-09-21|3-MEDIUM|Clerk#000000620|0| dependencies. accounts affix blithely slowly unusual deposits. slyly regular |61.2201|-149.831|61.2201|-149.831|
+1507|121|F|96166.92|1993-10-14|3-MEDIUM|Clerk#000000305|0|stealthy, ironic de|61.1663|-149.867|61.1663|-149.867|
+1508|103|O|151282.65|1998-04-10|5-LOW|Clerk#000000117|0| after the furiously regular pinto beans hang slyly quickly ironi|61.2138|-149.906|61.2138|-149.906|
+1509|64|F|180455.98|1993-07-08|5-LOW|Clerk#000000770|0|the regular ideas. regul|61.2193|-149.902|61.2193|-149.902|
+1510|53|O|154590.05|1996-09-17|5-LOW|Clerk#000000128|0|ld carefully. furiously final asymptotes haggle furiously|61.1201|-149.89|61.1201|-149.89|
+1511|79|O|59651.38|1996-12-22|4-NOT SPECIFIED|Clerk#000000386|0|ts above the depend|61.1601|-149.984|61.1601|-149.984|
+1536|94|O|5184.26|1997-01-26|3-MEDIUM|Clerk#000000117|0|ges are! furiously final deposits cajole iron|61.1101|-149.857|61.1101|-149.857|
+1537|109|F|108317.51|1992-02-15|4-NOT SPECIFIED|Clerk#000000862|0|g to the even deposits. ironic, final packages |61.1101|-149.857|61.1101|-149.857|
+1538|29|O|179554.41|1995-06-18|4-NOT SPECIFIED|Clerk#000000258|0| instructions. regular theod|61.1101|-149.857|61.1101|-149.857|
+1539|112|F|39612.63|1995-03-10|5-LOW|Clerk#000000840|0|nstructions boost pa|61.1101|-149.857|61.1101|-149.857|
+1540|16|F|128014.15|1992-08-05|2-HIGH|Clerk#000000927|0|r ideas hinder blithe|61.1101|-149.857|61.1101|-149.857|
+1541|94|P|47286.32|1995-05-18|1-URGENT|Clerk#000000906|0|y. slyly ironic warhorses around the furiously regul|61.1101|-149.857|61.1101|-149.857|
+1542|143|F|132972.24|1993-09-15|3-MEDIUM|Clerk#000000435|0|t the furiously close deposits do was f|61.1101|-149.857|61.1101|-149.857|
+1543|52|O|139047.22|1997-02-20|1-URGENT|Clerk#000000398|0|unts. furiously pend|61.1101|-149.857|61.1101|-149.857|
+1568|17|O|76119.72|1997-01-30|4-NOT SPECIFIED|Clerk#000000554|0|d notornis. carefully |61.1101|-149.857|61.1101|-149.857|
+1569|104|O|87803.55|1998-04-02|5-LOW|Clerk#000000786|0|orbits. fluffily even decoys serve blithely. furiously furious realms nag acro|61.1101|-149.857|61.1101|-149.857|
+1570|124|O|35589.57|1998-03-16|1-URGENT|Clerk#000000745|0|pinto beans haggle furiousl|61.1101|-149.857|61.1101|-149.857|
+1571|103|F|151404.78|1992-12-05|2-HIGH|Clerk#000000565|0|ously furiously bold warthogs. slyly ironic instructions are quickly a|61.1101|-149.857|61.1101|-149.857|
+1572|11|O|47232.79|1996-02-24|2-HIGH|Clerk#000000994|0|fluffily ironic accounts haggle blithely final platelets! slyly regular foxes|61.1101|-149.857|61.1101|-149.857|
+1573|148|F|86918.57|1992-12-28|2-HIGH|Clerk#000000940|0|ess, ironic deposits use along the carefu|61.1101|-149.857|61.1101|-149.857|
+1574|134|O|179923.54|1996-12-12|3-MEDIUM|Clerk#000000809|0| ideas hinder after the carefully unusual |61.1101|-149.857|61.1101|-149.857|
+1575|145|O|197031.52|1995-09-13|3-MEDIUM|Clerk#000000497|0|. furiously regular dep|61.1101|-149.857|61.1101|-149.857|
+1600|94|F|130515.61|1993-03-03|3-MEDIUM|Clerk#000000627|0|tions cajole quietly above the regular, silent requests. slyly fin|61.1101|-149.857|61.1101|-149.857|
+1601|53|F|73962.95|1994-08-27|5-LOW|Clerk#000000469|0|ent deposits are ca|61.1101|-149.857|61.1101|-149.857|
+1602|1|F|4225.26|1993-08-05|5-LOW|Clerk#000000660|0|deposits. busily silent instructions haggle furiously. fin|61.1101|-149.857|61.1101|-149.857|
+1603|2|F|29305.47|1993-07-31|4-NOT SPECIFIED|Clerk#000000869|0|s. slyly silent deposits boo|61.1101|-149.857|61.1101|-149.857|
+1604|113|F|107139.29|1993-07-17|5-LOW|Clerk#000000512|0|lithely silent waters. blithely unusual packages alongside |61.1101|-149.857|61.1101|-149.857|
+1605|58|O|130687.64|1998-04-24|4-NOT SPECIFIED|Clerk#000000616|0|sleep furiously? ruthless, even pinto beans |61.1101|-149.857|61.1101|-149.857|
+1606|53|O|115877.40|1997-04-17|4-NOT SPECIFIED|Clerk#000000550|0|r requests. quickly even platelets breach before the ironically|61.1101|-149.857|61.1101|-149.857|
+1607|149|O|166335.03|1995-12-16|2-HIGH|Clerk#000000498|0| bold, pending foxes haggle. slyly silent |61.1101|-149.857|61.1101|-149.857|
+1632|67|O|183286.33|1997-01-08|3-MEDIUM|Clerk#000000351|0|onic requests are accounts. bold a|61.1101|-149.857|61.1101|-149.857|
+1633|16|O|52359.51|1995-10-14|2-HIGH|Clerk#000000666|0|y silent accounts sl|61.1101|-149.857|61.1101|-149.857|
+1634|70|O|145898.47|1996-09-10|1-URGENT|Clerk#000000360|0|arefully blithely ironic requests. slyly unusual instructions alongside|61.1101|-149.857|61.1101|-149.857|
+1635|4|O|70232.26|1997-02-13|3-MEDIUM|Clerk#000000958|0|s. slyly ironic requests affix slyly |61.1101|-149.857|61.1101|-149.857|
+1636|79|O|172021.87|1997-06-17|3-MEDIUM|Clerk#000000457|0|ding requests. slyly ironic courts wake quickl|61.1101|-149.857|61.1101|-149.857|
+1637|73|F|180912.15|1995-02-08|4-NOT SPECIFIED|Clerk#000000189|0| final accounts. blithely silent ideas cajole bravely. carefully express |61.1101|-149.857|61.1101|-149.857|
+1638|139|O|172436.30|1997-08-13|2-HIGH|Clerk#000000643|0|he fluffily regular asymp|61.1101|-149.857|61.1101|-149.857|
+1639|5|O|104166.56|1995-08-20|4-NOT SPECIFIED|Clerk#000000939|0|haggle furiously. final requests detect furious|61.1101|-149.857|61.1101|-149.857|
+1664|64|O|178060.22|1996-03-03|1-URGENT|Clerk#000000090|0|y quickly even asymptotes. furiously regular packages haggle quickly fin|61.1101|-149.857|61.1101|-149.857|
+1665|76|F|4819.91|1994-05-08|2-HIGH|Clerk#000000920|0|ly regular packages are fluffily even ideas. fluffily final|61.1101|-149.857|61.1101|-149.857|
+1666|95|O|128367.97|1995-10-18|1-URGENT|Clerk#000000849|0|ffily pending dependencies wake fluffily. pending, final accounts |61.1101|-149.857|61.1101|-149.857|
+1667|5|O|125030.37|1997-10-10|2-HIGH|Clerk#000000103|0|e accounts. slyly express accounts must are a|64.8459|-147.759|64.8459|-147.759|
+1668|142|O|137576.19|1997-07-12|4-NOT SPECIFIED|Clerk#000000148|0|eodolites. carefully dogged dolphins haggle q|64.8426|-147.725|64.8426|-147.725|
+1669|2|O|24362.39|1997-06-09|3-MEDIUM|Clerk#000000663|0|er ironic requests detect furiously blithely sp|64.9401|-147.402|64.9401|-147.402|
+1670|25|O|89999.72|1997-05-24|2-HIGH|Clerk#000000320|0|unusual dependencies. furiously special platelets main|64.9401|-147.402|64.9401|-147.402|
+1671|35|O|104391.11|1996-07-27|4-NOT SPECIFIED|Clerk#000000275|0|ly. slyly pending requests was above the |64.8331|-147.647|64.8331|-147.647|
+1696|4|O|102665.03|1998-01-08|4-NOT SPECIFIED|Clerk#000000041|0|bravely bold accounts above the quickly bold|64.8371|-147.716|64.8371|-147.716|
+1697|76|O|122621.31|1996-10-07|1-URGENT|Clerk#000000815|0|o x-ray blithely. pl|64.8574|-147.759|64.8574|-147.759|
+1698|40|O|141118.87|1997-04-23|2-HIGH|Clerk#000000432|0|slyly. carefully express deposit|64.836|-147.727|64.836|-147.727|
+1699|85|F|66408.29|1993-12-30|1-URGENT|Clerk#000000125|0|jole blithely. furiously un|64.8132|-147.76|64.8132|-147.76|
+1700|65|O|89143.36|1996-06-15|3-MEDIUM|Clerk#000000328|0|ely final dolphins wake sometimes above the quietly regular deposits. fur|64.8451|-147.96|64.8451|-147.96|
+1701|130|F|72835.95|1992-05-19|2-HIGH|Clerk#000000395|0|furiously. regular, close theodoli|64.8891|-147.851|64.8891|-147.851|
+1702|67|P|194119.31|1995-05-07|2-HIGH|Clerk#000000300|0|around the carefully final deposits cajole carefully according to the b|64.8151|-147.707|64.8151|-147.707|
+1703|134|F|121220.59|1993-01-28|3-MEDIUM|Clerk#000000463|0| pinto beans poach. bold courts boost. regular, express deposits at|64.8363|-147.803|64.8363|-147.803|
+1728|64|O|131604.34|1996-05-22|2-HIGH|Clerk#000000711|0|beans. slyly regular instructions sleep! slyly final packages|64.8298|-147.611|64.8298|-147.611|
+1729|133|F|12137.76|1992-05-19|2-HIGH|Clerk#000000158|0|pending foxes wake. accounts|64.8989|-147.701|64.8989|-147.701|
+1730|124|O|150886.49|1998-07-24|5-LOW|Clerk#000000794|0| fluffily pending deposits serve. furiously even requests wake furiou|64.8371|-147.716|64.8371|-147.716|
+1731|128|O|190490.78|1996-01-06|1-URGENT|Clerk#000000268|0|lithely regular, final instructions. ironic, express packages are above|64.8147|-147.706|64.8147|-147.706|
+1732|146|F|179854.51|1993-11-29|5-LOW|Clerk#000000903|0|inal requests integrate dolph|64.8451|-147.812|64.8451|-147.812|
+1733|148|O|165489.52|1996-05-12|2-HIGH|Clerk#000000789|0|e carefully according to the accounts. furiously pending instructions sleep|64.8386|-147.788|64.8386|-147.788|
+1734|7|F|44002.53|1994-06-11|2-HIGH|Clerk#000000722|0| final ideas haggle. blithely quick foxes sleep busily bold ideas. i|64.8372|-147.768|64.8372|-147.768|
+1735|22|F|98541.95|1992-12-27|1-URGENT|Clerk#000000458|0|ully idle requests wake qu|64.8151|-147.707|64.8151|-147.707|
+1760|115|O|82151.12|1996-05-17|5-LOW|Clerk#000000917|0| deposits. busily regular deposits wake blithely along the furiously even re|64.843|-147.722|64.843|-147.722|
+1761|106|F|211925.95|1993-12-24|2-HIGH|Clerk#000000817|0|efully slyly bold frets. packages boost b|64.8426|-147.725|64.8426|-147.725|
+1762|77|F|202227.17|1994-08-20|4-NOT SPECIFIED|Clerk#000000653|0|ly ironic packages. furi|64.8615|-147.723|64.8615|-147.723|
+1763|121|O|140685.01|1996-10-29|2-HIGH|Clerk#000000321|0|es. bold dependencies haggle furiously along |64.8694|-147.067|64.8694|-147.067|
+1764|29|F|47384.71|1992-03-25|1-URGENT|Clerk#000000182|0|. slyly final packages integrate carefully acro|64.8404|-147.724|64.8404|-147.724|
+1765|73|O|36551.43|1995-12-03|4-NOT SPECIFIED|Clerk#000000490|0| regular excuses wake slyly|64.9686|-147.577|64.9686|-147.577|
+1766|139|O|41032.81|1996-10-12|2-HIGH|Clerk#000000983|0|unusual deposits affix quickly beyond the carefully s|64.8497|-147.732|64.8497|-147.732|
+1767|25|P|136582.60|1995-03-14|2-HIGH|Clerk#000000327|0|eposits use carefully carefully regular platelets. quickly regular packages al|64.8861|-147.587|64.8861|-147.587|
+1792|49|F|107919.86|1993-11-09|5-LOW|Clerk#000000102|0|ructions haggle along the pending packages. carefully speci|64.8508|-147.703|64.8508|-147.703|
+1793|19|F|82504.56|1992-07-12|4-NOT SPECIFIED|Clerk#000000291|0|regular packages cajole. blithely special packages according to the final d|64.841|-147.72|64.841|-147.72|
+1794|140|O|179462.21|1997-09-28|1-URGENT|Clerk#000000686|0|ally silent pinto beans. regular package|64.8375|-147.721|64.8375|-147.721|
+1795|94|F|146849.33|1994-03-19|2-HIGH|Clerk#000000815|0| quickly final packages! blithely dogged accounts c|64.849|-147.813|64.849|-147.813|
+1796|47|F|33755.47|1992-11-21|2-HIGH|Clerk#000000245|0|eans use furiously around th|55.3801|-131.682|55.3801|-131.682|
+1797|125|O|51494.47|1996-05-07|3-MEDIUM|Clerk#000000508|0|quiet platelets haggle since the quickly ironic instructi|55.3801|-131.682|55.3801|-131.682|
+1798|52|O|46393.97|1997-07-28|1-URGENT|Clerk#000000741|0|al foxes are blithe|55.3603|-131.702|55.3603|-131.702|
+1799|61|F|46815.93|1994-03-07|4-NOT SPECIFIED|Clerk#000000339|0|ns sleep furiously final waters. blithely regular instructions h|55.7511|-132.865|55.7511|-132.865|
+1824|49|F|81351.53|1994-05-05|1-URGENT|Clerk#000000972|0|e blithely fluffily|55.7511|-132.865|55.7511|-132.865|
+1825|148|F|150582.77|1993-12-05|3-MEDIUM|Clerk#000000345|0|ironic, final accou|60.3311|-151.284|60.3311|-151.284|
+1826|82|F|124719.97|1992-04-16|4-NOT SPECIFIED|Clerk#000000718|0|the even asymptotes dazzle fluffily slyly regular asymptotes. final, unu|60.3311|-151.284|60.3311|-151.284|
+1827|106|O|210113.88|1996-06-22|4-NOT SPECIFIED|Clerk#000000369|0|luffily even requests haggle sly|60.3311|-151.284|60.3311|-151.284|
+1828|32|F|137369.50|1994-04-18|3-MEDIUM|Clerk#000000840|0|y quickly bold packag|60.4341|-151.283|60.4341|-151.283|
+1829|112|F|127532.20|1994-05-08|2-HIGH|Clerk#000000537|0| accounts wake above the furiously unusual requests. pending package|60.3311|-151.284|60.3311|-151.284|
+1830|133|F|85122.24|1995-02-23|1-URGENT|Clerk#000000045|0|according to the even,|60.3311|-151.284|60.3311|-151.284|
+1831|71|F|58032.77|1993-12-02|1-URGENT|Clerk#000000854|0| accounts. carefully even accounts boost furiously. regular ideas engage. |60.3311|-151.284|60.3311|-151.284|
+1856|106|F|189361.42|1992-03-20|4-NOT SPECIFIED|Clerk#000000952|0|. special pinto beans run acr|60.3311|-151.284|60.3311|-151.284|
+1857|133|F|102793.59|1993-01-13|2-HIGH|Clerk#000000083|0|hely final ideas slee|60.3311|-151.284|60.3311|-151.284|
+1858|143|O|30457.91|1997-12-13|1-URGENT|Clerk#000000389|0|thely. slyly final deposits sleep|60.4311|-151.286|60.4311|-151.286|
+1859|61|O|105094.09|1997-04-11|4-NOT SPECIFIED|Clerk#000000949|0| the foxes. bravely special excuses nag carefully special r|60.3311|-151.284|60.3311|-151.284|
+1860|10|O|9103.40|1996-04-04|3-MEDIUM|Clerk#000000556|0|osits. quickly bold deposits according to |60.3311|-151.284|60.3311|-151.284|
+1861|70|F|95063.41|1994-01-03|3-MEDIUM|Clerk#000000847|0|r the fluffily close sauternes. furio|60.3311|-151.284|60.3311|-151.284|
+1862|34|O|97981.06|1998-02-24|5-LOW|Clerk#000000348|0|ts snooze ironically abou|60.3311|-151.284|60.3311|-151.284|
+1863|74|F|96359.65|1993-09-23|4-NOT SPECIFIED|Clerk#000000658|0|old sentiments. careful, |60.3191|-151.296|60.3191|-151.296|
+1888|121|F|224724.11|1993-10-31|4-NOT SPECIFIED|Clerk#000000659|0|olites. pinto beans cajole. regular deposits affix. slyly regular|60.3311|-151.284|60.3311|-151.284|
+1889|25|O|96431.77|1997-03-16|1-URGENT|Clerk#000000854|0|p around the regular notornis. unusual deposits|60.3311|-151.284|60.3311|-151.284|
+1890|10|O|202364.58|1996-12-18|4-NOT SPECIFIED|Clerk#000000627|0|romise final, regular deposits. regular fox|60.3311|-151.284|60.3311|-151.284|
+1891|61|F|76848.96|1994-12-15|5-LOW|Clerk#000000495|0|unusual foxes sleep regular deposits. requests wake special pac|60.5563|-151.241|60.5563|-151.241|
+1892|25|F|133273.64|1994-03-26|5-LOW|Clerk#000000733|0|sts. slyly regular dependencies use slyly. ironic, spec|60.6331|-151.163|60.6331|-151.163|
+1893|125|O|116792.13|1997-10-30|2-HIGH|Clerk#000000111|0|olites. silent, special deposits eat slyly quickly express packages; hockey p|60.6331|-151.163|60.6331|-151.163|
+1894|76|F|44387.23|1992-03-30|1-URGENT|Clerk#000000626|0|e furiously. furiously even accounts are slyly final accounts. closely speci|60.6331|-151.163|60.6331|-151.163|
+1895|7|F|44429.81|1994-05-30|3-MEDIUM|Clerk#000000878|0|ress accounts. bold accounts cajole. slyly final pinto beans poach regul|60.6331|-151.163|60.6331|-151.163|
+1920|110|O|119605.91|1998-06-24|5-LOW|Clerk#000000018|0|hely; furiously regular excuses|60.5551|-151.245|60.5551|-151.245|
+1921|88|F|57584.12|1994-01-18|3-MEDIUM|Clerk#000000293|0|counts. slyly quiet requests along the ruthlessly regular accounts are |60.6331|-151.163|60.6331|-151.163|
+1922|56|O|11575.77|1996-07-13|3-MEDIUM|Clerk#000000984|0|side of the blithely final re|60.5506|-151.141|60.5506|-151.141|
+1923|136|O|171128.10|1997-07-07|1-URGENT|Clerk#000000471|0| express dolphins. |60.5681|-151.281|60.5681|-151.281|
+1924|76|O|169756.19|1996-09-07|4-NOT SPECIFIED|Clerk#000000823|0| of the ironic accounts. instructions near the final instr|60.5465|-151.147|60.5465|-151.147|
+1925|17|F|146382.71|1992-03-05|1-URGENT|Clerk#000000986|0|e slyly regular deposits. furiously |60.6331|-151.163|60.6331|-151.163|
+1926|94|O|100035.03|1996-01-31|2-HIGH|Clerk#000000568|0|cajole. even warhorses sleep carefully. |60.5578|-151.116|60.5578|-151.116|
+1927|140|O|23327.88|1995-09-30|3-MEDIUM|Clerk#000000616|0|riously special packages. permanent pearls wake furiously. even packages alo|61.6182|-149.385|61.6182|-149.385|
+1952|67|F|12896.25|1994-03-16|2-HIGH|Clerk#000000254|0| silent accounts boost |61.6141|-149.457|61.6141|-149.457|
+1953|149|F|57213.18|1993-11-30|3-MEDIUM|Clerk#000000891|0| fluffily along the quickly even packages. |61.5765|-149.407|61.5765|-149.407|
+1954|56|O|158853.63|1997-05-31|4-NOT SPECIFIED|Clerk#000000104|0| unusual excuses cajole according to the blithely regular theodolites.|61.6091|-149.77|61.6091|-149.77|
+1955|13|F|103085.13|1992-04-20|1-URGENT|Clerk#000000792|0|ly special ideas. sometimes final |61.5821|-149.438|61.5821|-149.438|
+1956|127|F|88704.26|1992-09-20|4-NOT SPECIFIED|Clerk#000000600|0|ironic ideas are silent ideas. furiously final deposits sleep slyly carefu|61.6183|-149.373|61.6183|-149.373|
+1957|31|O|77482.87|1998-07-21|2-HIGH|Clerk#000000639|0|nding excuses about the |61.6131|-149.403|61.6131|-149.403|
+1958|53|O|176294.34|1995-09-22|5-LOW|Clerk#000000343|0| haggle blithely. flu|61.6352|-149.265|61.6352|-149.265|
+1959|43|O|62277.18|1997-01-13|4-NOT SPECIFIED|Clerk#000000631|0| cajole about the blithely express requests. even excuses mold bl|61.5751|-149.645|61.5751|-149.645|
+1984|52|O|79230.47|1998-04-01|1-URGENT|Clerk#000000416|0| slyly special instructions. unusual foxes use packages. carefully regular req|61.6168|-149.374|61.6168|-149.374|
+1985|7|F|171522.54|1994-09-02|4-NOT SPECIFIED|Clerk#000000741|0|slyly slyly even pains. slyly reg|61.5939|-149.43|61.5939|-149.43|
+1986|149|F|34269.96|1994-05-05|2-HIGH|Clerk#000000609|0|across the theodolites. quick|61.5792|-149.495|61.5792|-149.495|
+1987|100|F|6406.29|1994-04-30|2-HIGH|Clerk#000000652|0|gular platelets alongside |61.6141|-149.457|61.6141|-149.457|
+1988|109|O|117132.72|1995-10-06|4-NOT SPECIFIED|Clerk#000000011|0|ly ironic dolphins serve quickly busy accounts. bu|61.5829|-149.448|61.5829|-149.448|
+1989|118|F|39263.28|1994-03-16|4-NOT SPECIFIED|Clerk#000000747|0|ely bold pinto beans ha|61.5938|-149.387|61.5938|-149.387|
+1990|119|F|48781.39|1994-12-16|2-HIGH|Clerk#000000114|0|e bold patterns. always regul|61.5849|-149.38|61.5849|-149.38|
+1991|19|F|139854.41|1992-09-07|4-NOT SPECIFIED|Clerk#000000854|0|ing accounts can haggle at the carefully final Tiresias-- pending, regular|61.5729|-149.389|61.5729|-149.389|
+2016|8|O|24347.36|1996-08-16|3-MEDIUM|Clerk#000000641|0|the carefully ironic foxes. requests nag bold, r|61.5823|-149.462|61.5823|-149.462|
+2017|101|O|70529.27|1998-05-13|3-MEDIUM|Clerk#000000427|0|nusual requests. blit|61.57|-149.331|61.57|-149.331|
+2018|19|P|25007.95|1995-04-05|4-NOT SPECIFIED|Clerk#000000920|0|gular accounts wake fur|61.5821|-149.438|61.5821|-149.438|
+2019|136|F|43789.14|1992-10-23|1-URGENT|Clerk#000000565|0| furiously bold packages. fluffily fi|61.6141|-149.457|61.6141|-149.457|
+2020|73|F|136162.13|1993-06-21|3-MEDIUM|Clerk#000000192|0|es. furiously regular packages above the furiously special theodolites are a|61.6115|-149.331|61.6115|-149.331|
+2021|70|O|27016.74|1995-07-15|1-URGENT|Clerk#000000155|0|ong the furiously regular requests. unusual deposits wake fluffily inside|61.6091|-149.77|61.6091|-149.77|
+2022|62|F|206742.11|1992-03-15|1-URGENT|Clerk#000000268|0| dependencies sleep fluffily even, ironic deposits. express, silen|61.6141|-149.457|61.6141|-149.457|
+2023|118|F|144123.37|1992-05-06|5-LOW|Clerk#000000137|0|ular courts engage according to the|61.5826|-149.427|61.5826|-149.427|
+2048|17|F|33401.77|1993-11-15|1-URGENT|Clerk#000000934|0|s cajole after the blithely final accounts. f|61.5976|-149.366|61.5976|-149.366|
+2049|31|O|153048.74|1995-12-07|2-HIGH|Clerk#000000859|0|ly regular requests thrash blithely about the fluffily even theodolites. r|61.5976|-149.366|61.5976|-149.366|
+2050|28|F|208517.98|1994-06-02|4-NOT SPECIFIED|Clerk#000000821|0|d accounts against the furiously regular packages use bli|61.5531|-149.651|61.5531|-149.651|
+2051|40|O|87988.34|1996-03-18|4-NOT SPECIFIED|Clerk#000000333|0|ctions sleep blithely. blithely regu|61.5531|-149.651|61.5531|-149.651|
+2052|91|F|141822.19|1992-04-13|2-HIGH|Clerk#000000767|0| requests sleep around the even, even courts. ironic theodolites affix furious|61.5883|-149.456|61.5883|-149.456|
+2053|142|F|125125.57|1995-02-07|1-URGENT|Clerk#000000717|0|ar requests: blithely sly accounts boost carefully across t|61.6249|-149.435|61.6249|-149.435|
+2054|41|F|144335.16|1992-06-08|4-NOT SPECIFIED|Clerk#000000103|0|l requests affix carefully about the furiously special|61.6141|-149.457|61.6141|-149.457|
+2055|97|F|57092.26|1993-09-04|1-URGENT|Clerk#000000067|0|. warhorses affix slyly blithely express instructions? fur|61.5709|-149.452|61.5709|-149.452|
+2080|95|F|45767.69|1993-06-18|5-LOW|Clerk#000000190|0|ironic, pending theodolites are carefully about the quickly regular theodolite|61.6651|-149.465|61.6651|-149.465|
+2081|121|O|145654.97|1997-07-05|2-HIGH|Clerk#000000136|0|ong the regular theo|61.5841|-149.441|61.5841|-149.441|
+2082|49|F|46753.63|1995-01-10|2-HIGH|Clerk#000000354|0|cial accounts. ironic, express dolphins nod slyly sometimes final reques|61.1571|-149.883|61.1571|-149.883|
+2083|101|F|31795.52|1993-07-14|3-MEDIUM|Clerk#000000361|0|al patterns. bold, final foxes nag bravely about the furiously express|61.2198|-149.733|61.2198|-149.733|
+2084|80|F|190652.53|1993-03-17|2-HIGH|Clerk#000000048|0|zle furiously final, careful packages. slyly ironic ideas amo|61.1863|-149.976|61.1863|-149.976|
+2085|49|F|45311.07|1993-11-21|3-MEDIUM|Clerk#000000818|0|ress, express ideas haggle|61.2161|-149.876|61.2161|-149.876|
+2086|142|F|188985.18|1994-10-19|1-URGENT|Clerk#000000046|0| permanently regular|61.2031|-149.749|61.2031|-149.749|
+2087|50|O|53581.41|1998-01-31|2-HIGH|Clerk#000000626|0|e always regular packages nod against the furiously spec|61.1644|-149.897|61.1644|-149.897|
+2112|64|O|17986.15|1997-02-05|2-HIGH|Clerk#000000351|0|against the slyly even id|61.1834|-149.866|61.1834|-149.866|
+2113|32|O|65678.21|1997-11-08|2-HIGH|Clerk#000000527|0|slyly regular instruct|61.1731|-149.889|61.1731|-149.889|
+2114|79|F|106446.02|1995-01-16|5-LOW|Clerk#000000751|0|r, unusual accounts haggle across the busy platelets. carefully |61.1089|-149.854|61.1089|-149.854|
+2115|106|O|134814.65|1998-05-23|4-NOT SPECIFIED|Clerk#000000101|0|odolites boost. carefully regular excuses cajole. quickly ironic pinto be|61.1951|-149.916|61.1951|-149.916|
+2116|23|F|60887.90|1994-08-26|1-URGENT|Clerk#000000197|0|efully after the asymptotes. furiously sp|61.2157|-149.821|61.2157|-149.821|
+2117|22|O|145713.03|1997-04-26|2-HIGH|Clerk#000000887|0|ely even dependencies. regular foxes use blithely.|61.1372|-149.954|61.1372|-149.954|
+2118|134|O|38974.67|1996-10-09|1-URGENT|Clerk#000000196|0|ial requests wake carefully special packages. f|61.1955|-149.737|61.1955|-149.737|
+2119|64|O|34632.57|1996-08-20|2-HIGH|Clerk#000000434|0|uickly pending escapades. fluffily ir|61.1444|-149.867|61.1444|-149.867|
+2144|136|F|119917.28|1994-03-29|3-MEDIUM|Clerk#000000546|0|t. carefully quick requests across the deposits wake regu|61.2178|-149.882|61.2178|-149.882|
+2145|134|F|18885.35|1992-10-03|1-URGENT|Clerk#000000886|0|sts would snooze blithely alongside of th|61.1824|-149.849|61.1824|-149.849|
+2146|118|F|179686.07|1992-09-14|4-NOT SPECIFIED|Clerk#000000476|0|ven packages. dependencies wake slyl|61.2161|-149.876|61.2161|-149.876|
+2147|100|F|91513.79|1992-09-06|4-NOT SPECIFIED|Clerk#000000424|0| haggle carefully furiously final foxes. pending escapades thrash. bold theod|61.2022|-149.84|61.2022|-149.84|
+2148|130|F|19612.03|1995-04-19|4-NOT SPECIFIED|Clerk#000000517|0|ross the furiously unusual theodolites. always expre|61.2099|-149.762|61.2099|-149.762|
+2149|101|F|105145.40|1993-03-13|5-LOW|Clerk#000000555|0|nusual accounts nag furiously special reques|61.1951|-149.84|61.1951|-149.84|
+2150|82|F|166961.06|1994-06-03|3-MEDIUM|Clerk#000000154|0|ect slyly against the even, final packages. quickly regular pinto beans wake c|61.1069|-149.859|61.1069|-149.859|
+2151|58|O|124608.69|1996-11-11|3-MEDIUM|Clerk#000000996|0|c requests. ironic platelets cajole across the quickly fluffy deposits.|61.1635|-149.881|61.1635|-149.881|
+2176|104|F|87248.17|1992-11-10|1-URGENT|Clerk#000000195|0|s haggle regularly accor|61.1201|-149.89|61.1201|-149.89|
+2177|136|O|183493.42|1997-01-20|3-MEDIUM|Clerk#000000161|0|ove the blithely unusual packages cajole carefully fluffily special request|61.1902|-149.908|61.1902|-149.908|
+2178|8|O|79594.68|1996-12-12|3-MEDIUM|Clerk#000000656|0|thely according to the instructions. furious|61.2104|-149.857|61.2104|-149.857|
+2179|41|O|77487.09|1996-09-07|2-HIGH|Clerk#000000935|0|ounts alongside of the furiously unusual braids cajol|61.1771|-149.97|61.1771|-149.97|
+2180|76|O|208481.57|1996-09-14|4-NOT SPECIFIED|Clerk#000000650|0|xpress, unusual pains. furiously ironic excu|61.1859|-149.976|61.1859|-149.976|
+2181|76|O|100954.64|1995-09-13|3-MEDIUM|Clerk#000000814|0|y against the ironic, even|61.2171|-149.9|61.2171|-149.9|
+2182|23|F|116003.11|1994-04-05|2-HIGH|Clerk#000000071|0|ccounts. quickly bold deposits across the excuses sl|61.1162|-149.755|61.1162|-149.755|
+2183|113|O|49841.12|1996-06-22|1-URGENT|Clerk#000000287|0| among the express, ironic packages. slyly ironic platelets integrat|61.1381|-149.844|61.1381|-149.844|
+2208|68|P|245388.06|1995-05-01|4-NOT SPECIFIED|Clerk#000000900|0|symptotes wake slyly blithely unusual packages.|61.1775|-149.941|61.1775|-149.941|
+2209|91|F|129086.93|1992-07-10|2-HIGH|Clerk#000000056|0|er above the slyly silent requests. furiously reg|61.1938|-149.878|61.1938|-149.878|
+2210|32|F|31689.46|1992-01-16|2-HIGH|Clerk#000000941|0| believe carefully quickly express pinto beans. deposi|61.1571|-149.883|61.1571|-149.883|
+2211|92|F|140031.23|1994-06-30|2-HIGH|Clerk#000000464|0|ffily bold courts e|61.1541|-149.958|61.1541|-149.958|
+2212|118|F|17231.05|1994-03-23|3-MEDIUM|Clerk#000000954|0|structions above the unusual requests use fur|61.135|-149.88|61.135|-149.88|
+2213|122|F|146136.10|1993-01-15|4-NOT SPECIFIED|Clerk#000000598|0|osits are carefully reg|61.1101|-149.857|61.1101|-149.857|
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/data/orders-with-locations-part2.txt b/hyracks/hyracks-examples/hyracks-integration-tests/data/orders-with-locations-part2.txt
new file mode 100644
index 0000000..afbd373
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/data/orders-with-locations-part2.txt
@@ -0,0 +1,193 @@
+2214|115|O|150345.63|1998-05-05|3-MEDIUM|Clerk#000000253|0|packages. fluffily even accounts haggle blithely. carefully ironic depen|61.1101|-149.857|61.1101|-149.857|
+2215|40|O|108239.46|1996-06-16|4-NOT SPECIFIED|Clerk#000000817|0|le final, final foxes. quickly regular gifts are carefully deposit|61.1101|-149.857|61.1101|-149.857|
+2240|56|F|174090.30|1992-03-06|4-NOT SPECIFIED|Clerk#000000622|0|accounts against the slyly express foxes are after the slyly regular |61.1101|-149.857|61.1101|-149.857|
+2241|103|F|165219.08|1993-05-11|1-URGENT|Clerk#000000081|0|y about the silent excuses. furiously ironic instructions along the sil|61.1101|-149.857|61.1101|-149.857|
+2242|82|O|15082.82|1997-07-20|4-NOT SPECIFIED|Clerk#000000360|0| pending multipliers. carefully express asymptotes use quickl|61.1101|-149.857|61.1101|-149.857|
+2243|49|O|10451.97|1995-06-10|2-HIGH|Clerk#000000813|0|ously regular deposits integrate s|61.1101|-149.857|61.1101|-149.857|
+2244|127|F|21207.08|1993-01-09|1-URGENT|Clerk#000001000|0|ckages. ironic, ironic accounts haggle blithely express excuses. |61.1101|-149.857|61.1101|-149.857|
+2245|58|F|150585.73|1993-04-28|3-MEDIUM|Clerk#000000528|0|ake carefully. braids haggle slyly quickly b|61.1101|-149.857|61.1101|-149.857|
+2246|113|O|85755.84|1996-05-27|4-NOT SPECIFIED|Clerk#000000739|0| final gifts sleep |61.1101|-149.857|61.1101|-149.857|
+2247|95|F|13491.31|1992-08-02|4-NOT SPECIFIED|Clerk#000000947|0|furiously regular packages. final brai|61.1101|-149.857|61.1101|-149.857|
+2272|139|F|127934.71|1993-04-13|2-HIGH|Clerk#000000449|0|s. bold, ironic pinto beans wake. silently specia|61.1101|-149.857|61.1101|-149.857|
+2273|136|O|142291.79|1996-12-14|5-LOW|Clerk#000000155|0|uickly express foxes haggle quickly against|61.1101|-149.857|61.1101|-149.857|
+2274|104|F|58273.89|1993-09-04|4-NOT SPECIFIED|Clerk#000000258|0|nstructions try to hag|61.1101|-149.857|61.1101|-149.857|
+2275|149|F|37398.90|1992-10-22|4-NOT SPECIFIED|Clerk#000000206|0| furiously furious platelets. slyly final packa|61.1101|-149.857|61.1101|-149.857|
+2276|43|O|141159.63|1996-04-29|4-NOT SPECIFIED|Clerk#000000821|0|ecial requests. fox|61.1101|-149.857|61.1101|-149.857|
+2277|89|F|79270.23|1995-01-02|4-NOT SPECIFIED|Clerk#000000385|0|accounts cajole. even i|61.1101|-149.857|61.1101|-149.857|
+2278|142|O|101878.46|1998-04-25|3-MEDIUM|Clerk#000000186|0|r pinto beans integrate after the carefully even deposits. blit|61.1101|-149.857|61.1101|-149.857|
+2279|80|F|142322.33|1993-02-23|3-MEDIUM|Clerk#000000898|0|de of the quickly unusual instructio|61.2141|-149.864|61.2141|-149.864|
+2304|46|F|93769.28|1994-01-07|4-NOT SPECIFIED|Clerk#000000415|0|onic platelets. ironic packages haggle. packages nag doggedly according to|61.2171|-149.9|61.2171|-149.9|
+2305|43|F|122964.66|1993-01-26|2-HIGH|Clerk#000000440|0|ove the furiously even acco|61.2171|-149.9|61.2171|-149.9|
+2306|28|O|244704.23|1995-07-26|2-HIGH|Clerk#000000975|0| wake furiously requests. permanent requests affix. final packages caj|61.2171|-149.9|61.2171|-149.9|
+2307|106|F|59417.76|1993-06-29|5-LOW|Clerk#000000952|0|furiously even asymptotes? carefully regular accounts|61.2171|-149.9|61.2171|-149.9|
+2308|25|F|58546.02|1992-10-25|4-NOT SPECIFIED|Clerk#000000609|0|ts. slyly final depo|61.2171|-149.9|61.2171|-149.9|
+2309|100|O|146933.07|1995-09-04|5-LOW|Clerk#000000803|0|he carefully pending packages. fluffily stealthy foxes engage carefully|61.2171|-149.9|61.2171|-149.9|
+2310|31|O|82928.12|1996-09-20|5-LOW|Clerk#000000917|0|wake carefully. unusual instructions nag ironic, regular excuse|61.2171|-149.9|61.2171|-149.9|
+2311|73|P|153233.93|1995-05-02|2-HIGH|Clerk#000000761|0|ly pending asymptotes-- furiously bold excus|61.2171|-149.9|61.2171|-149.9|
+2336|142|O|22294.51|1996-01-07|4-NOT SPECIFIED|Clerk#000000902|0|c, final excuses sleep furiously among the even theodolites. f|61.2171|-149.9|61.2171|-149.9|
+2337|142|O|45704.96|1997-06-18|4-NOT SPECIFIED|Clerk#000000754|0| quickly. final accounts haggle. carefully final acco|61.2171|-149.9|61.2171|-149.9|
+2338|140|O|28155.92|1997-09-15|2-HIGH|Clerk#000000951|0|riously final dugouts. final, ironic packages wake express, ironic id|61.2171|-149.9|61.2171|-149.9|
+2339|109|F|63470.78|1993-12-15|5-LOW|Clerk#000000847|0| against the regular |61.2171|-149.9|61.2171|-149.9|
+2340|65|O|30778.78|1996-01-12|1-URGENT|Clerk#000000964|0|ter the deposits sleep according to the slyly regular packages. carefully |61.2171|-149.9|61.2171|-149.9|
+2341|82|F|55950.21|1993-05-30|5-LOW|Clerk#000000443|0|sts-- blithely bold dolphins through the deposits nag blithely carefully re|61.2171|-149.9|61.2171|-149.9|
+2342|37|O|104038.78|1996-06-09|1-URGENT|Clerk#000000615|0|oost carefully across the regular accounts. blithely final d|61.2171|-149.9|61.2171|-149.9|
+2343|73|O|85381.00|1995-08-21|3-MEDIUM|Clerk#000000170|0|fluffily over the slyly special deposits. quickl|64.8487|-147.704|64.8487|-147.704|
+2368|13|F|101240.96|1993-08-20|1-URGENT|Clerk#000000830|0|t the bold instructions. carefully unusual |64.8486|-147.705|64.8486|-147.705|
+2369|110|O|73517.91|1996-12-24|2-HIGH|Clerk#000000752|0|iously even requests are dogged, express |64.8087|-147.71|64.8087|-147.71|
+2370|142|F|73924.21|1994-01-17|1-URGENT|Clerk#000000231|0|lyly final packages. quickly final deposits haggl|64.8363|-147.758|64.8363|-147.758|
+2371|19|O|193857.67|1998-01-07|1-URGENT|Clerk#000000028|0|ckages haggle at th|64.8476|-147.704|64.8476|-147.704|
+2372|31|O|104927.66|1997-11-21|5-LOW|Clerk#000000342|0|s: deposits haggle along the final ideas. careful|64.8302|-147.744|64.8302|-147.744|
+2373|28|F|55211.04|1994-03-12|4-NOT SPECIFIED|Clerk#000000306|0| even, special courts grow quickly. pending,|64.8476|-147.812|64.8476|-147.812|
+2374|4|F|115219.88|1993-10-29|4-NOT SPECIFIED|Clerk#000000081|0| blithely regular packages. blithely unusua|64.8144|-147.756|64.8144|-147.756|
+2375|5|O|106612.48|1996-11-20|3-MEDIUM|Clerk#000000197|0|unusual, pending theodolites cajole carefully |64.8183|-147.778|64.8183|-147.778|
+2400|37|O|92798.66|1998-07-25|5-LOW|Clerk#000000782|0|nusual courts nag against the carefully unusual pinto b|64.8494|-147.818|64.8494|-147.818|
+2401|148|O|88448.24|1997-07-29|4-NOT SPECIFIED|Clerk#000000531|0|ully unusual instructions boost carefully silently regular requests. |64.849|-147.822|64.849|-147.822|
+2402|67|O|70403.62|1996-09-06|4-NOT SPECIFIED|Clerk#000000162|0|slyly final sheaves sleep slyly. q|64.8367|-147.716|64.8367|-147.716|
+2403|55|O|111020.79|1998-04-11|3-MEDIUM|Clerk#000000820|0|furiously regular deposits use. furiously unusual accounts wake along the |64.8127|-147.772|64.8127|-147.772|
+2404|77|O|109077.69|1997-03-13|4-NOT SPECIFIED|Clerk#000000409|0|deposits breach furiously. ironic foxes haggle carefully bold packag|64.8143|-147.751|64.8143|-147.751|
+2405|73|O|115929.14|1996-12-23|3-MEDIUM|Clerk#000000535|0|ular, regular asympto|64.842|-147.721|64.842|-147.721|
+2406|7|O|182516.77|1996-10-28|5-LOW|Clerk#000000561|0|blithely regular accounts u|64.8403|-147.714|64.8403|-147.714|
+2407|55|O|112843.52|1998-06-19|2-HIGH|Clerk#000000068|0|uests affix slyly among the slyly regular depos|64.8371|-147.881|64.8371|-147.881|
+2432|103|O|62661.93|1996-07-13|1-URGENT|Clerk#000000115|0|re. slyly even deposits wake bra|64.8151|-147.707|64.8151|-147.707|
+2433|31|F|147071.86|1994-08-22|4-NOT SPECIFIED|Clerk#000000324|0|ess patterns are slyly. packages haggle carefu|64.8151|-147.707|64.8151|-147.707|
+2434|25|O|123956.25|1997-04-27|3-MEDIUM|Clerk#000000190|0|s. quickly ironic dolphins impress final deposits. blithel|64.8541|-147.81|64.8541|-147.81|
+2435|73|F|122490.66|1993-02-21|5-LOW|Clerk#000000112|0|es are carefully along the carefully final instructions. pe|64.8878|-147.496|64.8878|-147.496|
+2436|125|O|73990.08|1995-09-11|4-NOT SPECIFIED|Clerk#000000549|0|arefully. blithely bold deposits affix special accounts. final foxes nag. spe|64.8299|-147.728|64.8299|-147.728|
+2437|85|F|143411.69|1993-04-21|4-NOT SPECIFIED|Clerk#000000578|0|. theodolites wake slyly-- ironic, pending platelets above the carefully exp|64.8132|-147.762|64.8132|-147.762|
+2438|13|F|214494.39|1993-07-15|2-HIGH|Clerk#000000744|0|the final, regular warhorses. regularly |64.8372|-147.713|64.8372|-147.713|
+2439|55|O|41811.12|1997-03-15|2-HIGH|Clerk#000000819|0|lithely after the car|64.7927|-148.036|64.7927|-148.036|
+2464|145|O|30495.65|1997-11-23|5-LOW|Clerk#000000633|0|le about the instructions. courts wake carefully even|64.8717|-147.819|64.8717|-147.819|
+2465|34|O|180737.75|1995-06-24|1-URGENT|Clerk#000000078|0|al pinto beans. final, bold packages wake quickly|64.8527|-147.686|64.8527|-147.686|
+2466|19|F|161625.50|1994-03-06|1-URGENT|Clerk#000000424|0|c pinto beans. express deposits wake quickly. even, final courts nag. package|64.8371|-147.811|64.8371|-147.811|
+2467|35|O|7231.91|1995-07-16|4-NOT SPECIFIED|Clerk#000000914|0|pades sleep furiously. sometimes regular packages again|64.846|-147.705|64.846|-147.705|
+2468|112|O|160627.01|1997-06-09|4-NOT SPECIFIED|Clerk#000000260|0|ickly regular packages. slyly ruthless requests snooze quickly blithe|64.9064|-147.726|64.9064|-147.726|
+2469|124|O|192074.23|1996-11-26|5-LOW|Clerk#000000730|0| sleep closely regular instructions. furiously ironic instructi|64.9347|-147.56|64.9347|-147.56|
+2470|58|O|104966.33|1997-04-19|3-MEDIUM|Clerk#000000452|0|to the furiously final packages? pa|64.8861|-147.677|64.8861|-147.677|
+2471|89|O|34936.31|1998-03-12|4-NOT SPECIFIED|Clerk#000000860|0|carefully blithely regular pac|64.8302|-147.744|64.8302|-147.744|
+2496|136|F|140390.60|1994-01-09|2-HIGH|Clerk#000000142|0|slyly. pending instructions sleep. quic|60.6673|-151.311|60.6673|-151.311|
+2497|47|F|171326.48|1992-08-27|1-URGENT|Clerk#000000977|0|ily ironic pinto beans. furiously final platelets alongside of t|60.6997|-151.38|60.6997|-151.38|
+2498|97|F|45514.27|1993-11-08|5-LOW|Clerk#000000373|0|g the slyly special pinto beans. |60.5658|-151.244|60.5658|-151.244|
+2499|121|O|147243.86|1995-09-24|1-URGENT|Clerk#000000277|0|r the quickly bold foxes. bold instructi|60.6331|-151.163|60.6331|-151.163|
+2500|133|F|131122.82|1992-08-15|2-HIGH|Clerk#000000447|0|integrate slyly pending deposits. furiously ironic accounts across the s|60.6331|-151.163|60.6331|-151.163|
+2501|67|O|79380.51|1997-05-25|5-LOW|Clerk#000000144|0|ickly special theodolite|60.6331|-151.163|60.6331|-151.163|
+2502|70|F|33470.40|1993-05-28|4-NOT SPECIFIED|Clerk#000000914|0|lyly: carefully pending ideas affix again|60.6201|-151.332|60.6201|-151.332|
+2503|7|F|183671.08|1993-06-20|3-MEDIUM|Clerk#000000294|0|ly even packages was. ironic, regular deposits unwind furiously across the p|60.5004|-151.276|60.5004|-151.276|
+2528|55|F|92069.62|1994-11-20|1-URGENT|Clerk#000000789|0|ular dependencies? regular frays kindle according to the blith|60.6331|-151.163|60.6331|-151.163|
+2529|136|O|4104.30|1996-08-20|2-HIGH|Clerk#000000511|0|posits across the silent instructions wake blithely across |60.6331|-151.163|60.6331|-151.163|
+2530|128|F|58853.11|1994-03-21|3-MEDIUM|Clerk#000000291|0|ular instructions about the quic|60.6901|-151.321|60.6901|-151.321|
+2531|44|O|143212.85|1996-05-06|4-NOT SPECIFIED|Clerk#000000095|0|even accounts. furiously ironic excuses sleep fluffily. carefully silen|60.6676|-151.29|60.6676|-151.29|
+2532|94|O|116093.49|1995-10-11|2-HIGH|Clerk#000000498|0|the blithely pending accounts. regular, regular excuses boost aro|60.6331|-151.163|60.6331|-151.163|
+2533|50|O|168495.03|1997-03-24|1-URGENT|Clerk#000000594|0|ecial instructions. spec|60.5632|-151.266|60.5632|-151.266|
+2534|76|O|202784.54|1996-07-17|3-MEDIUM|Clerk#000000332|0|packages cajole ironic requests. furiously regular|60.6331|-151.163|60.6331|-151.163|
+2535|121|F|67018.30|1993-05-25|5-LOW|Clerk#000000296|0|phins cajole beneath the fluffily express asymptotes. c|60.6331|-151.163|60.6331|-151.163|
+2560|131|F|153426.79|1992-09-05|1-URGENT|Clerk#000000538|0|atelets; quickly sly requests|60.6509|-151.342|60.6509|-151.342|
+2561|58|O|137473.58|1997-11-14|1-URGENT|Clerk#000000861|0|ual requests. unusual deposits cajole furiously pending, regular platelets. |60.5601|-151.107|60.5601|-151.107|
+2562|10|F|136360.37|1992-08-01|1-URGENT|Clerk#000000467|0|elets. pending dolphins promise slyly. bo|60.5123|-151.275|60.5123|-151.275|
+2563|62|F|168952.10|1993-11-19|4-NOT SPECIFIED|Clerk#000000150|0|sly even packages after the furio|60.6076|-151.325|60.6076|-151.325|
+2564|77|F|3967.47|1994-09-09|2-HIGH|Clerk#000000718|0|usly regular pinto beans. orbits wake carefully. slyly e|60.6331|-151.163|60.6331|-151.163|
+2565|56|O|204438.57|1998-02-28|3-MEDIUM|Clerk#000000032|0|x-ray blithely along|60.5175|-151.235|60.5175|-151.235|
+2566|86|F|89992.48|1992-10-10|3-MEDIUM|Clerk#000000414|0|ructions boost bold ideas. idly ironic accounts use according to th|60.5535|-151.108|60.5535|-151.108|
+2567|70|O|263411.29|1998-02-27|2-HIGH|Clerk#000000031|0|detect. furiously ironic requests|60.5614|-151.275|60.5614|-151.275|
+2592|101|F|8225.96|1993-03-05|4-NOT SPECIFIED|Clerk#000000524|0|ts nag fluffily. quickly stealthy theodolite|60.5647|-151.195|60.5647|-151.195|
+2593|92|F|134726.09|1993-09-04|2-HIGH|Clerk#000000468|0|r the carefully final|60.6331|-151.163|60.6331|-151.163|
+2594|79|F|94866.39|1992-12-17|1-URGENT|Clerk#000000550|0|ests. theodolites above the blithely even accounts detect furio|60.6331|-151.163|60.6331|-151.163|
+2595|74|O|173130.20|1995-12-14|4-NOT SPECIFIED|Clerk#000000222|0|arefully ironic requests nag carefully ideas. |60.6331|-151.163|60.6331|-151.163|
+2596|43|O|74940.13|1996-08-17|1-URGENT|Clerk#000000242|0|requests. ironic, bold theodolites wak|60.6331|-151.163|60.6331|-151.163|
+2597|104|F|21964.66|1993-02-04|2-HIGH|Clerk#000000757|0|iously ruthless exc|60.6331|-151.163|60.6331|-151.163|
+2598|112|O|84871.50|1996-03-05|3-MEDIUM|Clerk#000000391|0| ironic notornis according to the blithely final requests should |60.6678|-151.31|60.6678|-151.31|
+2599|149|O|62807.13|1996-11-07|2-HIGH|Clerk#000000722|0|ts. slyly regular theodolites wake sil|60.5003|-151.276|60.5003|-151.276|
+2624|52|O|27148.63|1996-11-28|5-LOW|Clerk#000000930|0|ic, regular packages|60.6331|-151.163|60.6331|-151.163|
+2625|40|F|39382.74|1992-10-14|4-NOT SPECIFIED|Clerk#000000386|0| final deposits. blithely ironic ideas |61.5855|-149.326|61.5855|-149.326|
+2626|139|O|84314.51|1995-09-08|4-NOT SPECIFIED|Clerk#000000289|0|gside of the carefully special packages are furiously after the slyly express |61.5979|-149.437|61.5979|-149.437|
+2627|149|F|26798.65|1992-03-24|3-MEDIUM|Clerk#000000181|0|s. silent, ruthless requests|61.6141|-149.457|61.6141|-149.457|
+2628|56|F|165655.99|1993-10-22|5-LOW|Clerk#000000836|0|ajole across the blithely careful accounts. blithely silent deposits sl|61.5799|-149.461|61.5799|-149.461|
+2629|139|O|96458.03|1998-04-06|5-LOW|Clerk#000000680|0|uches dazzle carefully even, express excuses. ac|61.5845|-149.337|61.5845|-149.337|
+2630|85|F|127132.51|1992-10-24|5-LOW|Clerk#000000712|0|inal theodolites. ironic instructions s|61.5351|-149.558|61.5351|-149.558|
+2631|37|F|63103.32|1993-09-24|5-LOW|Clerk#000000833|0| quickly unusual deposits doubt around |61.5811|-149.45|61.5811|-149.45|
+2656|77|F|105492.37|1993-05-04|1-URGENT|Clerk#000000307|0|elets. slyly final accou|61.5793|-149.442|61.5793|-149.442|
+2657|25|O|148176.06|1995-10-17|2-HIGH|Clerk#000000160|0| foxes-- slyly final dependencies around the slyly final theodo|61.5661|-149.313|61.5661|-149.313|
+2658|14|O|163834.46|1995-09-23|3-MEDIUM|Clerk#000000400|0|bout the slyly regular accounts. ironic, |61.6141|-149.457|61.6141|-149.457|
+2659|83|F|79785.52|1993-12-18|4-NOT SPECIFIED|Clerk#000000758|0|cross the pending requests maintain |61.5786|-149.332|61.5786|-149.332|
+2660|127|O|16922.51|1995-08-05|5-LOW|Clerk#000000480|0|ly finally regular deposits. ironic theodolites cajole|61.5811|-149.45|61.5811|-149.45|
+2661|74|O|106036.84|1997-01-04|3-MEDIUM|Clerk#000000217|0|al, regular pinto beans. silently final deposits should have t|61.5825|-149.429|61.5825|-149.429|
+2662|37|O|87689.88|1996-08-21|3-MEDIUM|Clerk#000000589|0|bold pinto beans above the slyly final accounts affix furiously deposits. pac|61.6141|-149.457|61.6141|-149.457|
+2663|95|O|35131.80|1995-09-06|1-URGENT|Clerk#000000950|0|ar requests. furiously final dolphins along the fluffily spe|61.5531|-149.651|61.5531|-149.651|
+2688|98|F|181077.36|1992-01-24|2-HIGH|Clerk#000000720|0|have to nag according to the pending theodolites. sly|61.5531|-149.651|61.5531|-149.651|
+2689|103|F|41552.78|1992-04-09|4-NOT SPECIFIED|Clerk#000000698|0|press pains wake. furiously express theodolites alongsid|61.5698|-149.62|61.5698|-149.62|
+2690|94|O|224674.27|1996-03-31|3-MEDIUM|Clerk#000000760|0|ravely even theodolites |61.6141|-149.457|61.6141|-149.457|
+2691|7|F|30137.17|1992-04-30|5-LOW|Clerk#000000439|0|es at the regular deposits sleep slyly by the fluffy requests. eve|61.5474|-149.458|61.5474|-149.458|
+2692|62|O|24265.24|1997-12-02|3-MEDIUM|Clerk#000000878|0|es. regular asymptotes cajole above t|61.5825|-149.429|61.5825|-149.429|
+2693|19|O|66158.13|1996-09-04|1-URGENT|Clerk#000000370|0|ndle never. blithely regular packages nag carefully enticing platelets. ca|61.5955|-149.423|61.5955|-149.423|
+2694|121|O|102807.59|1996-03-14|5-LOW|Clerk#000000722|0| requests. bold deposits above the theodol|61.5801|-149.461|61.5801|-149.461|
+2695|58|O|138584.20|1996-08-20|1-URGENT|Clerk#000000697|0|ven deposits around the quickly regular packa|61.5785|-149.415|61.5785|-149.415|
+2720|31|F|161307.05|1993-06-08|1-URGENT|Clerk#000000948|0|quickly. special asymptotes are fluffily ironi|61.6402|-149.34|61.6402|-149.34|
+2721|79|O|59180.25|1996-01-27|2-HIGH|Clerk#000000401|0| ideas eat even, unusual ideas. theodolites are carefully|61.583|-149.457|61.583|-149.457|
+2722|35|F|50328.84|1994-04-09|5-LOW|Clerk#000000638|0|rding to the carefully quick deposits. bli|61.5907|-149.295|61.5907|-149.295|
+2723|61|O|104759.25|1995-10-06|5-LOW|Clerk#000000836|0|nts must have to cajo|61.6141|-149.457|61.6141|-149.457|
+2724|137|F|116069.66|1994-09-14|2-HIGH|Clerk#000000217|0| sleep blithely. blithely idle |61.5933|-149.397|61.5933|-149.397|
+2725|89|F|75144.68|1994-05-21|4-NOT SPECIFIED|Clerk#000000835|0|ular deposits. spec|61.6091|-149.77|61.6091|-149.77|
+2726|7|F|47753.00|1992-11-27|5-LOW|Clerk#000000470|0| blithely even dinos sleep care|61.577|-149.411|61.577|-149.411|
+2727|74|O|3089.42|1998-04-19|4-NOT SPECIFIED|Clerk#000000879|0|sual theodolites cajole enticingly above the furiously fin|61.6078|-149.322|61.6078|-149.322|
+2752|59|F|187932.30|1993-11-19|2-HIGH|Clerk#000000648|0| carefully regular foxes are quickly quickl|61.6131|-149.397|61.6131|-149.397|
+2753|16|F|159720.39|1993-11-30|2-HIGH|Clerk#000000380|0|ending instructions. unusual deposits|61.6648|-149.372|61.6648|-149.372|
+2754|145|F|25985.52|1994-04-03|2-HIGH|Clerk#000000960|0|cies detect slyly. |61.5531|-149.651|61.5531|-149.651|
+2755|118|F|101202.18|1992-02-07|4-NOT SPECIFIED|Clerk#000000177|0|ously according to the sly foxes. blithely regular pinto bean|61.5811|-149.45|61.5811|-149.45|
+2756|118|F|142323.38|1994-04-18|1-URGENT|Clerk#000000537|0|arefully special warho|61.583|-149.457|61.583|-149.457|
+2757|76|O|89792.48|1995-07-20|2-HIGH|Clerk#000000216|0| regular requests subl|61.1955|-149.9|61.1955|-149.9|
+2758|43|O|36671.88|1998-07-12|5-LOW|Clerk#000000863|0|s cajole according to the carefully special |61.1844|-149.897|61.1844|-149.897|
+2759|116|F|89731.10|1993-11-25|4-NOT SPECIFIED|Clerk#000000071|0|ts. regular, pending pinto beans sleep ab|61.1901|-149.892|61.1901|-149.892|
+2784|95|O|106635.21|1998-01-07|1-URGENT|Clerk#000000540|0|g deposits alongside of the silent requests s|61.1444|-149.867|61.1444|-149.867|
+2785|148|O|132854.79|1995-07-21|2-HIGH|Clerk#000000098|0|iously pending packages sleep according to the blithely unusual foxe|61.1955|-149.9|61.1955|-149.9|
+2786|79|F|178254.66|1992-03-22|2-HIGH|Clerk#000000976|0|al platelets cajole blithely ironic requests. ironic re|61.1893|-149.887|61.1893|-149.887|
+2787|103|O|3726.14|1995-09-30|1-URGENT|Clerk#000000906|0|he ironic, regular |61.2174|-149.888|61.2174|-149.888|
+2788|124|F|17172.66|1994-09-22|1-URGENT|Clerk#000000641|0|nts wake across the fluffily bold accoun|61.2227|-149.842|61.2227|-149.842|
+2789|37|O|219123.27|1998-03-14|2-HIGH|Clerk#000000972|0|gular patterns boost. carefully even re|61.1263|-149.872|61.1263|-149.872|
+2790|25|F|177458.97|1994-08-19|2-HIGH|Clerk#000000679|0| the carefully express deposits sleep slyly |61.1138|-149.866|61.1138|-149.866|
+2791|121|F|156697.55|1994-10-10|2-HIGH|Clerk#000000662|0|as. slyly ironic accounts play furiously bl|61.2157|-149.821|61.2157|-149.821|
+2816|58|F|42225.53|1994-09-20|2-HIGH|Clerk#000000289|0|kages at the final deposits cajole furious foxes. quickly |61.2174|-149.888|61.2174|-149.888|
+2817|40|F|71453.85|1994-04-19|3-MEDIUM|Clerk#000000982|0|ic foxes haggle upon the daringly even pinto beans. slyly|61.1855|-149.868|61.1855|-149.868|
+2818|49|F|120086.84|1994-12-12|3-MEDIUM|Clerk#000000413|0|eep furiously special ideas. express |61.1951|-149.873|61.1951|-149.873|
+2819|103|F|66927.16|1994-05-05|1-URGENT|Clerk#000000769|0|ngside of the blithely ironic dolphins. furio|61.1444|-149.867|61.1444|-149.867|
+2820|19|F|143813.39|1994-05-20|3-MEDIUM|Clerk#000000807|0|equests are furiously. carefu|61.1883|-149.735|61.1883|-149.735|
+2821|118|F|36592.48|1993-08-09|3-MEDIUM|Clerk#000000323|0|ng requests. even instructions are quickly express, silent instructi|61.2161|-149.876|61.2161|-149.876|
+2822|79|F|40142.15|1993-07-26|2-HIGH|Clerk#000000510|0|furiously against the accounts. unusual accounts aft|61.2161|-149.876|61.2161|-149.876|
+2823|79|O|171894.45|1995-09-09|2-HIGH|Clerk#000000567|0|encies. carefully fluffy accounts m|61.1893|-149.888|61.1893|-149.888|
+2848|70|F|116258.53|1992-03-10|1-URGENT|Clerk#000000256|0|ly fluffy foxes sleep furiously across the slyly regu|61.2174|-149.888|61.2174|-149.888|
+2849|46|O|180054.29|1996-04-30|2-HIGH|Clerk#000000659|0|al packages are after the quickly bold requests. carefully special |61.1914|-149.886|61.1914|-149.886|
+2850|100|O|122969.79|1996-10-02|2-HIGH|Clerk#000000392|0|, regular deposits. furiously pending packages hinder carefully carefully u|61.1541|-149.958|61.1541|-149.958|
+2851|145|O|7859.36|1997-09-07|5-LOW|Clerk#000000566|0|Tiresias wake quickly quickly even|61.1259|-149.717|61.1259|-149.717|
+2852|91|F|99050.81|1993-01-16|1-URGENT|Clerk#000000740|0|ruthless deposits against the final instructions use quickly al|61.2193|-149.902|61.2193|-149.902|
+2853|94|F|103641.15|1994-05-05|2-HIGH|Clerk#000000878|0|the carefully even packages.|61.1879|-149.886|61.1879|-149.886|
+2854|139|F|153568.02|1994-06-27|1-URGENT|Clerk#000000010|0| furiously ironic tithes use furiously |61.1372|-149.912|61.1372|-149.912|
+2855|49|F|48419.58|1993-04-04|4-NOT SPECIFIED|Clerk#000000973|0| silent, regular packages sleep |61.1101|-149.857|61.1101|-149.857|
+2880|8|F|145761.99|1992-03-15|2-HIGH|Clerk#000000756|0|ves maintain doggedly spec|61.1791|-149.94|61.1791|-149.94|
+2881|100|F|45695.84|1992-05-10|5-LOW|Clerk#000000864|0|uriously. slyly express requests according to the silent dol|61.2031|-149.749|61.2031|-149.749|
+2882|121|O|172872.37|1995-08-22|2-HIGH|Clerk#000000891|0|pending deposits. carefully eve|61.1914|-149.877|61.1914|-149.877|
+2883|121|F|170360.27|1995-01-23|5-LOW|Clerk#000000180|0|uses. carefully ironic accounts lose fluffil|61.1944|-149.883|61.1944|-149.883|
+2884|92|O|71683.84|1997-10-12|3-MEDIUM|Clerk#000000780|0|efully express instructions sleep against|61.1923|-149.886|61.1923|-149.886|
+2885|7|F|146896.72|1992-09-19|4-NOT SPECIFIED|Clerk#000000280|0|ly sometimes special excuses. final requests are |61.2123|-149.854|61.2123|-149.854|
+2886|109|F|94527.23|1994-11-13|4-NOT SPECIFIED|Clerk#000000619|0|uctions. ironic packages sle|61.2161|-149.876|61.2161|-149.876|
+2887|109|O|28571.39|1997-05-26|5-LOW|Clerk#000000566|0|slyly even pinto beans. slyly bold epitaphs cajole blithely above t|61.2171|-149.9|61.2171|-149.9|
+2912|94|F|27727.52|1992-03-12|5-LOW|Clerk#000000186|0|jole blithely above the quickly regular packages. carefully regular pinto bean|61.1125|-149.861|61.1125|-149.861|
+2913|43|O|130702.19|1997-07-12|3-MEDIUM|Clerk#000000118|0|mptotes doubt furiously slyly regu|61.1419|-149.896|61.1419|-149.896|
+2914|109|F|60867.14|1993-03-03|3-MEDIUM|Clerk#000000543|0|he slyly regular theodolites are furiously sile|61.145|-149.878|61.145|-149.878|
+2915|94|F|96015.13|1994-03-31|5-LOW|Clerk#000000410|0|ld packages. bold deposits boost blithely. ironic, unusual theodoli|61.1044|-149.865|61.1044|-149.865|
+2916|8|O|20182.22|1995-12-27|2-HIGH|Clerk#000000681|0|ithely blithe deposits sleep beyond the|61.1444|-149.876|61.1444|-149.876|
+2917|91|O|100714.13|1997-12-09|4-NOT SPECIFIED|Clerk#000000061|0| special dugouts among the special deposi|61.1|-149.85|61.1|-149.85|
+2918|118|O|21760.09|1996-09-08|3-MEDIUM|Clerk#000000439|0|ular deposits across th|61.1105|-149.861|61.1105|-149.861|
+2919|53|F|137223.14|1993-12-10|2-HIGH|Clerk#000000209|0|es. pearls wake quietly slyly ironic instructions--|61.1286|-149.957|61.1286|-149.957|
+2944|14|O|146581.14|1997-09-24|4-NOT SPECIFIED|Clerk#000000740|0|deas. permanently special foxes haggle carefully ab|61.1201|-149.89|61.1201|-149.89|
+2945|29|O|223507.72|1996-01-03|2-HIGH|Clerk#000000499|0|ons are carefully toward the permanent, bold pinto beans. regu|61.112|-149.871|61.112|-149.871|
+2946|125|O|102226.59|1996-02-05|5-LOW|Clerk#000000329|0|g instructions about the regular accounts sleep carefully along the pen|61.1427|-149.864|61.1427|-149.864|
+2947|70|P|43360.95|1995-04-26|1-URGENT|Clerk#000000464|0|ronic accounts. accounts run furiously d|61.1212|-149.947|61.1212|-149.947|
+2948|44|F|100758.71|1994-08-23|5-LOW|Clerk#000000701|0| deposits according to the blithely pending |61.1228|-149.939|61.1228|-149.939|
+2949|137|F|94231.71|1994-04-12|2-HIGH|Clerk#000000184|0|y ironic accounts use. quickly blithe accou|61.1093|-149.871|61.1093|-149.871|
+2950|136|O|183620.33|1997-07-06|1-URGENT|Clerk#000000833|0| dolphins around the furiously |61.145|-149.878|61.145|-149.878|
+2951|74|O|125509.17|1996-02-06|2-HIGH|Clerk#000000680|0|gular deposits above the finally regular ideas integrate idly stealthil|61.1191|-149.871|61.1191|-149.871|
+2976|29|F|145768.47|1993-12-10|4-NOT SPECIFIED|Clerk#000000159|0|. furiously ironic asymptotes haggle ruthlessly silently regular r|61.1003|-149.856|61.1003|-149.856|
+2977|73|O|25170.88|1996-08-27|3-MEDIUM|Clerk#000000252|0|quickly special platelets are furio|61.1113|-149.872|61.1113|-149.872|
+2978|44|P|139542.14|1995-05-03|1-URGENT|Clerk#000000135|0|d. even platelets are. ironic dependencies cajole slow, e|61.1084|-149.861|61.1084|-149.861|
+2979|133|O|116789.98|1996-03-23|3-MEDIUM|Clerk#000000820|0|even, ironic foxes sleep along|61.144|-149.878|61.144|-149.878|
+2980|4|O|187514.11|1996-09-14|3-MEDIUM|Clerk#000000661|0|y quick pinto beans wake. slyly re|61.1426|-149.877|61.1426|-149.877|
+2981|49|O|37776.79|1998-07-29|5-LOW|Clerk#000000299|0|hely among the express foxes. blithely stealthy requests cajole boldly. regu|61.1173|-149.861|61.1173|-149.861|
+2982|85|F|55582.94|1995-03-19|2-HIGH|Clerk#000000402|0|lyly. express theodolites affix slyly after the slyly speci|61.1347|-149.914|61.1347|-149.914|
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/data/orders-with-locations.txt b/hyracks/hyracks-examples/hyracks-integration-tests/data/orders-with-locations.txt
deleted file mode 100644
index f936a6e..0000000
--- a/hyracks/hyracks-examples/hyracks-integration-tests/data/orders-with-locations.txt
+++ /dev/null
@@ -1,750 +0,0 @@
-1|37|O|131251.81|1996-01-02|5-LOW|Clerk#000000951|0|nstructions sleep furiously among |42.3631|-71.065|42.3631|-71.065|
-2|79|O|40183.29|1996-12-01|1-URGENT|Clerk#000000880|0| foxes. pending accounts at the pending, silent asymptot|42.1091|-70.696|42.1091|-70.696|
-3|124|F|160882.76|1993-10-14|5-LOW|Clerk#000000955|0|sly final accounts boost. carefully regular ideas cajole carefully. depos|40.8151|-73.0452|40.8151|-73.0452|
-4|137|O|31084.79|1995-10-11|5-LOW|Clerk#000000124|0|sits. slyly regular warthogs cajole. regular, regular theodolites acro|40.8151|-73.0452|40.8151|-73.0452|
-5|46|F|86615.25|1994-07-30|5-LOW|Clerk#000000925|0|quickly. bold deposits sleep slyly. packages use slyly|42.2481|-71.174|42.2481|-71.174|
-6|56|F|36468.55|1992-02-21|4-NOT SPECIFIED|Clerk#000000058|0|ggle. special, final requests are against the furiously specia|61.1201|-149.89|61.1201|-149.89|
-7|40|O|171488.73|1996-01-10|2-HIGH|Clerk#000000470|0|ly special requests |61.1501|-149.926|61.1501|-149.926|
-32|131|O|116923.00|1995-07-16|2-HIGH|Clerk#000000616|0|ise blithely bold, regular requests. quickly unusual dep|61.181|-149.814|61.181|-149.814|
-33|67|F|99798.76|1993-10-27|3-MEDIUM|Clerk#000000409|0|uriously. furiously final request|61.1517|-149.86|61.1517|-149.86|
-34|62|O|41670.02|1998-07-21|3-MEDIUM|Clerk#000000223|0|ly final packages. fluffily final deposits wake blithely ideas. spe|61.1806|-149.814|61.1806|-149.814|
-35|128|O|148789.52|1995-10-23|4-NOT SPECIFIED|Clerk#000000259|0|zzle. carefully enticing deposits nag furio|61.1806|-149.775|61.1806|-149.775|
-36|116|O|38988.98|1995-11-03|1-URGENT|Clerk#000000358|0| quick packages are blithely. slyly silent accounts wake qu|61.1806|-149.775|61.1806|-149.775|
-37|88|F|113701.89|1992-06-03|3-MEDIUM|Clerk#000000456|0|kly regular pinto beans. carefully unusual waters cajole never|61.1806|-149.775|61.1806|-149.775|
-38|125|O|46366.56|1996-08-21|4-NOT SPECIFIED|Clerk#000000604|0|haggle blithely. furiously express ideas haggle blithely furiously regular re|61.2113|-149.824|61.2113|-149.824|
-39|82|O|219707.84|1996-09-20|3-MEDIUM|Clerk#000000659|0|ole express, ironic requests: ir|61.1967|-149.877|61.1967|-149.877|
-64|34|F|20065.73|1994-07-16|3-MEDIUM|Clerk#000000661|0|wake fluffily. sometimes ironic pinto beans about the dolphin|61.2164|-149.892|61.2164|-149.892|
-65|17|P|65883.92|1995-03-18|1-URGENT|Clerk#000000632|0|ular requests are blithely pending orbits-- even requests against the deposit|61.1571|-149.883|61.1571|-149.883|
-66|130|F|79258.24|1994-01-20|5-LOW|Clerk#000000743|0|y pending requests integrate|61.2048|-149.834|61.2048|-149.834|
-67|58|O|116227.05|1996-12-19|4-NOT SPECIFIED|Clerk#000000547|0|symptotes haggle slyly around the furiously iron|61.0956|-149.843|61.0956|-149.843|
-68|29|O|215135.72|1998-04-18|3-MEDIUM|Clerk#000000440|0| pinto beans sleep carefully. blithely ironic deposits haggle furiously acro|61.1491|-149.809|61.1491|-149.809|
-69|85|F|162176.23|1994-06-04|4-NOT SPECIFIED|Clerk#000000330|0| depths atop the slyly thin deposits detect among the furiously silent accou|61.1981|-149.871|61.1981|-149.871|
-70|65|F|84651.80|1993-12-18|5-LOW|Clerk#000000322|0| carefully ironic request|61.1982|-149.876|61.1982|-149.876|
-71|4|O|178821.73|1998-01-24|4-NOT SPECIFIED|Clerk#000000271|0| express deposits along the blithely regul|61.1924|-149.909|61.1924|-149.909|
-96|109|F|55090.67|1994-04-17|2-HIGH|Clerk#000000395|0|oost furiously. pinto|61.2204|-149.728|61.2204|-149.728|
-97|22|F|68908.31|1993-01-29|3-MEDIUM|Clerk#000000547|0|hang blithely along the regular accounts. furiously even ideas after the|61.196|-149.864|61.196|-149.864|
-98|106|F|51004.44|1994-09-25|1-URGENT|Clerk#000000448|0|c asymptotes. quickly regular packages should have to nag re|61.1987|-149.889|61.1987|-149.889|
-99|89|F|92326.79|1994-03-13|4-NOT SPECIFIED|Clerk#000000973|0|e carefully ironic packages. pending|61.1984|-149.897|61.1984|-149.897|
-100|148|O|141311.01|1998-02-28|4-NOT SPECIFIED|Clerk#000000577|0|heodolites detect slyly alongside of the ent|61.1897|-149.898|61.1897|-149.898|
-101|28|O|95591.40|1996-03-17|3-MEDIUM|Clerk#000000419|0|ding accounts above the slyly final asymptote|61.1228|-149.81|61.1228|-149.81|
-102|1|O|113954.89|1997-05-09|2-HIGH|Clerk#000000596|0| slyly according to the asymptotes. carefully final packages integrate furious|61.1649|-149.881|61.1649|-149.881|
-103|31|O|95563.95|1996-06-20|4-NOT SPECIFIED|Clerk#000000090|0|ges. carefully unusual instructions haggle quickly regular f|61.1934|-149.887|61.1934|-149.887|
-128|74|F|36333.34|1992-06-15|1-URGENT|Clerk#000000385|0|ns integrate fluffily. ironic asymptotes after the regular excuses nag around |61.2164|-149.892|61.2164|-149.892|
-129|73|F|188124.55|1992-11-19|5-LOW|Clerk#000000859|0|ing tithes. carefully pending deposits boost about the silently express |61.1932|-149.886|61.1932|-149.886|
-130|37|F|115717.37|1992-05-08|2-HIGH|Clerk#000000036|0|le slyly unusual, regular packages? express deposits det|61.2072|-149.888|61.2072|-149.888|
-131|94|F|96596.81|1994-06-08|3-MEDIUM|Clerk#000000625|0|after the fluffily special foxes integrate s|61.2125|-149.904|61.2125|-149.904|
-132|28|F|118802.62|1993-06-11|3-MEDIUM|Clerk#000000488|0|sits are daringly accounts. carefully regular foxes sleep slyly about the|61.2142|-149.806|61.2142|-149.806|
-133|44|O|80437.72|1997-11-29|1-URGENT|Clerk#000000738|0|usly final asymptotes |61.1866|-149.923|61.1866|-149.923|
-134|7|F|154260.84|1992-05-01|4-NOT SPECIFIED|Clerk#000000711|0|lar theodolites boos|61.1089|-149.857|61.1089|-149.857|
-135|61|O|174569.88|1995-10-21|4-NOT SPECIFIED|Clerk#000000804|0|l platelets use according t|61.1024|-149.853|61.1024|-149.853|
-160|83|O|86076.86|1996-12-19|4-NOT SPECIFIED|Clerk#000000342|0|thely special sauternes wake slyly of t|61.1891|-149.906|61.1891|-149.906|
-161|17|F|19056.99|1994-08-31|2-HIGH|Clerk#000000322|0|carefully! special instructions sin|61.1891|-149.906|61.1891|-149.906|
-162|16|O|2158.13|1995-05-08|3-MEDIUM|Clerk#000000378|0|nts hinder fluffily ironic instructions. express, express excuses |61.1891|-149.906|61.1891|-149.906|
-163|88|O|125170.86|1997-09-05|3-MEDIUM|Clerk#000000379|0|y final packages. final foxes since the quickly even|61.1891|-149.906|61.1891|-149.906|
-164|1|F|202660.52|1992-10-21|5-LOW|Clerk#000000209|0|cajole ironic courts. slyly final ideas are slyly. blithely final Tiresias sub|61.1891|-149.906|61.1891|-149.906|
-165|28|F|141824.23|1993-01-30|4-NOT SPECIFIED|Clerk#000000292|0|across the blithely regular accounts. bold|61.1891|-149.906|61.1891|-149.906|
-166|109|O|93335.60|1995-09-12|2-HIGH|Clerk#000000440|0|lets. ironic, bold asymptotes kindle|61.1891|-149.906|61.1891|-149.906|
-167|121|F|52982.23|1993-01-04|4-NOT SPECIFIED|Clerk#000000731|0|s nag furiously bold excuses. fluffily iron|61.1891|-149.906|61.1891|-149.906|
-192|83|O|133002.55|1997-11-25|5-LOW|Clerk#000000483|0|y unusual platelets among the final instructions integrate rut|61.1891|-149.906|61.1891|-149.906|
-193|80|F|48053.18|1993-08-08|1-URGENT|Clerk#000000025|0|the furiously final pin|61.1891|-149.906|61.1891|-149.906|
-194|62|F|114097.63|1992-04-05|3-MEDIUM|Clerk#000000352|0|egular requests haggle slyly regular, regular pinto beans. asymptote|61.1891|-149.906|61.1891|-149.906|
-195|136|F|120053.52|1993-12-28|3-MEDIUM|Clerk#000000216|0|old forges are furiously sheaves. slyly fi|61.1891|-149.906|61.1891|-149.906|
-196|65|F|33248.04|1993-03-17|2-HIGH|Clerk#000000988|0|beans boost at the foxes. silent foxes|61.1891|-149.906|61.1891|-149.906|
-197|34|P|100290.07|1995-04-07|2-HIGH|Clerk#000000969|0|solve quickly about the even braids. carefully express deposits affix care|61.1891|-149.906|61.1891|-149.906|
-198|112|O|125792.83|1998-01-02|4-NOT SPECIFIED|Clerk#000000331|0|its. carefully ironic requests sleep. furiously express fox|61.1891|-149.906|61.1891|-149.906|
-199|53|O|80592.44|1996-03-07|2-HIGH|Clerk#000000489|0|g theodolites. special packag|61.1891|-149.906|61.1891|-149.906|
-224|4|F|155680.60|1994-06-18|4-NOT SPECIFIED|Clerk#000000642|0|r the quickly thin courts. carefully|61.1891|-149.906|61.1891|-149.906|
-225|34|P|165890.47|1995-05-25|1-URGENT|Clerk#000000177|0|s. blithely ironic accounts wake quickly fluffily special acc|61.1891|-149.906|61.1891|-149.906|
-226|128|F|180119.22|1993-03-10|2-HIGH|Clerk#000000756|0|s are carefully at the blithely ironic acc|61.1891|-149.906|61.1891|-149.906|
-227|10|O|46076.46|1995-11-10|5-LOW|Clerk#000000919|0| express instructions. slyly regul|61.1891|-149.906|61.1891|-149.906|
-228|46|F|2638.98|1993-02-25|1-URGENT|Clerk#000000562|0|es was slyly among the regular foxes. blithely regular dependenci|61.1891|-149.906|61.1891|-149.906|
-229|112|F|142290.77|1993-12-29|1-URGENT|Clerk#000000628|0|he fluffily even instructions. furiously i|61.1891|-149.906|61.1891|-149.906|
-230|103|F|107231.60|1993-10-27|1-URGENT|Clerk#000000520|0|odolites. carefully quick requ|61.1891|-149.906|61.1891|-149.906|
-231|91|F|141554.06|1994-09-29|2-HIGH|Clerk#000000446|0| packages haggle slyly after the carefully ironic instruct|61.1891|-149.906|61.1891|-149.906|
-256|125|F|106315.25|1993-10-19|4-NOT SPECIFIED|Clerk#000000834|0|he fluffily final ideas might are final accounts. carefully f|61.1891|-149.906|61.1891|-149.906|
-257|124|O|7102.74|1998-03-28|3-MEDIUM|Clerk#000000680|0|ts against the sly warhorses cajole slyly accounts|61.1891|-149.906|61.1891|-149.906|
-258|43|F|186669.10|1993-12-29|1-URGENT|Clerk#000000167|0|dencies. blithely quick packages cajole. ruthlessly final accounts|61.1891|-149.906|61.1891|-149.906|
-259|44|F|75661.70|1993-09-29|4-NOT SPECIFIED|Clerk#000000601|0|ages doubt blithely against the final foxes. carefully express deposits dazzle|61.1891|-149.906|61.1891|-149.906|
-260|106|O|179292.14|1996-12-10|3-MEDIUM|Clerk#000000960|0|lently regular pinto beans sleep after the slyly e|61.1891|-149.906|61.1891|-149.906|
-261|47|F|201003.12|1993-06-29|3-MEDIUM|Clerk#000000310|0|ully fluffily brave instructions. furiousl|61.1891|-149.906|61.1891|-149.906|
-262|31|O|108443.84|1995-11-25|4-NOT SPECIFIED|Clerk#000000551|0|l packages. blithely final pinto beans use carefu|61.1891|-149.906|61.1891|-149.906|
-263|118|F|79782.56|1994-05-17|2-HIGH|Clerk#000000088|0| pending instructions. blithely un|61.1891|-149.906|61.1891|-149.906|
-288|8|O|163794.53|1997-02-21|1-URGENT|Clerk#000000109|0|uriously final requests. even, final ideas det|61.1891|-149.906|61.1891|-149.906|
-289|104|O|131092.67|1997-02-10|3-MEDIUM|Clerk#000000103|0|sily. slyly special excuse|61.1891|-149.906|61.1891|-149.906|
-290|118|F|62814.89|1994-01-01|4-NOT SPECIFIED|Clerk#000000735|0|efully dogged deposits. furiou|61.1891|-149.906|61.1891|-149.906|
-291|142|F|66817.05|1994-03-13|1-URGENT|Clerk#000000923|0|dolites. carefully regular pinto beans cajol|64.8541|-147.813|64.8541|-147.813|
-292|23|F|30783.05|1992-01-13|2-HIGH|Clerk#000000193|0|g pinto beans will have to sleep f|64.8414|-147.606|64.8414|-147.606|
-293|31|F|37248.78|1992-10-02|2-HIGH|Clerk#000000629|0|re bold, ironic deposits. platelets c|64.8371|-147.746|64.8371|-147.746|
-294|52|F|30059.47|1993-07-16|3-MEDIUM|Clerk#000000499|0|kly according to the frays. final dolphins affix quickly |64.8151|-147.707|64.8151|-147.707|
-295|19|F|89345.99|1994-09-29|2-HIGH|Clerk#000000155|0| unusual pinto beans play. regular ideas haggle|64.8371|-147.746|64.8371|-147.746|
-320|1|O|39835.54|1997-11-21|2-HIGH|Clerk#000000573|0|ar foxes nag blithely|64.849|-147.813|64.849|-147.813|
-321|124|F|62251.15|1993-03-21|3-MEDIUM|Clerk#000000289|0|equests run. blithely final dependencies after the deposits wake caref|64.8425|-147.724|64.8425|-147.724|
-322|134|F|127068.89|1992-03-19|1-URGENT|Clerk#000000158|0|fully across the slyly bold packages. packages against the quickly regular i|64.8425|-147.724|64.8425|-147.724|
-323|40|F|79683.42|1994-03-26|1-URGENT|Clerk#000000959|0|arefully pending foxes sleep blithely. slyly express accoun|64.849|-147.826|64.849|-147.826|
-324|106|F|26868.85|1992-03-20|1-URGENT|Clerk#000000352|0| about the ironic, regular deposits run blithely against the excuses|64.815|-147.882|64.815|-147.882|
-325|41|F|71543.41|1993-10-17|5-LOW|Clerk#000000844|0|ly sometimes pending pa|64.8906|-147.628|64.8906|-147.628|
-326|76|O|229165.17|1995-06-04|2-HIGH|Clerk#000000466|0| requests. furiously ironic asymptotes mold carefully alongside of the blit|64.8276|-147.639|64.8276|-147.639|
-327|145|P|24468.16|1995-04-17|5-LOW|Clerk#000000992|0|ng the slyly final courts. slyly even escapades eat |64.8461|-147.813|64.8461|-147.813|
-352|107|F|16003.86|1994-03-08|2-HIGH|Clerk#000000932|0|ke slyly bold pinto beans. blithely regular accounts against the spe|64.8281|-147.812|64.8281|-147.812|
-353|2|F|179984.42|1993-12-31|5-LOW|Clerk#000000449|0| quiet ideas sleep. even instructions cajole slyly. silently spe|64.8377|-147.718|64.8377|-147.718|
-354|139|O|157062.70|1996-03-14|2-HIGH|Clerk#000000511|0|ly regular ideas wake across the slyly silent ideas. final deposits eat b|64.8417|-147.718|64.8417|-147.718|
-355|71|F|69447.25|1994-06-14|5-LOW|Clerk#000000532|0|s. sometimes regular requests cajole. regular, pending accounts a|64.8145|-147.772|64.8145|-147.772|
-356|148|F|162786.67|1994-06-30|4-NOT SPECIFIED|Clerk#000000944|0|as wake along the bold accounts. even, |64.8541|-147.813|64.8541|-147.813|
-357|61|O|98723.11|1996-10-09|2-HIGH|Clerk#000000301|0|e blithely about the express, final accounts. quickl|64.8169|-147.779|64.8169|-147.779|
-358|4|F|226806.66|1993-09-20|2-HIGH|Clerk#000000392|0|l, silent instructions are slyly. silently even de|64.8378|-147.71|64.8378|-147.71|
-359|79|F|142891.22|1994-12-19|3-MEDIUM|Clerk#000000934|0|n dolphins. special courts above the carefully ironic requests use|64.8436|-147.722|64.8436|-147.722|
-384|115|F|122785.82|1992-03-03|5-LOW|Clerk#000000206|0|, even accounts use furiously packages. slyly ironic pla|64.9401|-147.402|64.9401|-147.402|
-385|34|O|50724.06|1996-03-22|5-LOW|Clerk#000000600|0|hless accounts unwind bold pain|64.8426|-147.719|64.8426|-147.719|
-386|61|F|90380.40|1995-01-25|2-HIGH|Clerk#000000648|0| haggle quickly. stealthily bold asymptotes haggle among the furiously even re|64.8534|-147.811|64.8534|-147.811|
-387|4|O|130647.18|1997-01-26|4-NOT SPECIFIED|Clerk#000000768|0| are carefully among the quickly even deposits. furiously silent req|64.9341|-147.928|64.9341|-147.928|
-388|46|F|120533.46|1992-12-16|4-NOT SPECIFIED|Clerk#000000356|0|ar foxes above the furiously ironic deposits nag slyly final reque|64.8393|-147.72|64.8393|-147.72|
-389|127|F|1984.14|1994-02-17|2-HIGH|Clerk#000000062|0|ing to the regular asymptotes. final, pending foxes about the blithely sil|64.8406|-147.731|64.8406|-147.731|
-390|103|O|168562.27|1998-04-07|5-LOW|Clerk#000000404|0|xpress asymptotes use among the regular, final pinto b|64.9281|-147.865|64.9281|-147.865|
-391|112|F|13282.23|1994-11-17|2-HIGH|Clerk#000000256|0|orges thrash fluffil|64.8371|-147.716|64.8371|-147.716|
-416|41|F|71362.50|1993-09-27|5-LOW|Clerk#000000294|0| the accounts. fluffily bold depo|64.9414|-147.841|64.9414|-147.841|
-417|55|F|91982.29|1994-02-06|3-MEDIUM|Clerk#000000468|0|ironic, even packages. thinly unusual accounts sleep along the slyly unusual |64.8363|-147.79|64.8363|-147.79|
-418|95|P|33124.96|1995-04-13|4-NOT SPECIFIED|Clerk#000000643|0|. furiously ironic instruc|64.8371|-147.716|64.8371|-147.716|
-419|118|O|111597.96|1996-10-01|3-MEDIUM|Clerk#000000376|0|osits. blithely pending theodolites boost carefully|64.8591|-147.917|64.8591|-147.917|
-420|91|O|198039.23|1995-10-31|4-NOT SPECIFIED|Clerk#000000756|0|leep carefully final excuses. fluffily pending requests unwind carefully above|64.8363|-147.79|64.8363|-147.79|
-421|40|F|1084.38|1992-02-22|5-LOW|Clerk#000000405|0|egular, even packages according to the final, un|55.3801|-131.682|55.3801|-131.682|
-422|74|O|106045.89|1997-05-31|4-NOT SPECIFIED|Clerk#000000049|0|aggle carefully across the accounts. regular accounts eat fluffi|55.3073|-131.528|55.3073|-131.528|
-423|104|O|26981.31|1996-06-01|1-URGENT|Clerk#000000674|0|quests. deposits cajole quickly. furiously bold accounts haggle q|55.3801|-131.682|55.3801|-131.682|
-448|149|O|114978.03|1995-08-21|3-MEDIUM|Clerk#000000597|0| regular, express foxes use blithely. quic|55.3601|-131.681|55.3601|-131.681|
-449|97|O|41605.63|1995-07-20|2-HIGH|Clerk#000000841|0|. furiously regular theodolites affix blithely |55.3279|-131.613|55.3279|-131.613|
-450|49|P|153386.61|1995-03-05|4-NOT SPECIFIED|Clerk#000000293|0|d theodolites. boldly bold foxes since the pack|55.3129|-131.588|55.3129|-131.588|
-451|100|O|104664.40|1998-05-25|5-LOW|Clerk#000000048|0|nic pinto beans. theodolites poach carefully; |55.3801|-131.682|55.3801|-131.682|
-452|61|O|2007.48|1997-10-14|1-URGENT|Clerk#000000498|0|t, unusual instructions above the blithely bold pint|55.3801|-131.682|55.3801|-131.682|
-453|46|O|216826.73|1997-05-26|5-LOW|Clerk#000000504|0|ss foxes. furiously regular ideas sleep according to t|55.4299|-131.789|55.4299|-131.789|
-454|49|O|23198.24|1995-12-27|5-LOW|Clerk#000000890|0|dolites sleep carefully blithely regular deposits. quickly regul|55.3801|-131.682|55.3801|-131.682|
-455|13|O|138010.76|1996-12-04|1-URGENT|Clerk#000000796|0| about the final platelets. dependen|55.3507|-131.671|55.3507|-131.671|
-480|73|F|20530.97|1993-05-08|5-LOW|Clerk#000000004|0|ealthy pinto beans. fluffily regular requests along the special sheaves wake |55.3801|-131.682|55.3801|-131.682|
-481|31|F|117827.18|1992-10-08|2-HIGH|Clerk#000000230|0|ly final ideas. packages haggle fluffily|55.3394|-131.636|55.3394|-131.636|
-482|127|O|136634.34|1996-03-26|1-URGENT|Clerk#000000295|0|ts. deposits wake: final acco|55.3801|-131.682|55.3801|-131.682|
-483|35|O|39793.05|1995-07-11|2-HIGH|Clerk#000000025|0|cross the carefully final e|55.3103|-131.582|55.3103|-131.582|
-484|55|O|219920.62|1997-01-03|3-MEDIUM|Clerk#000000545|0|grouches use. furiously bold accounts maintain. bold, regular deposits|55.3801|-131.682|55.3801|-131.682|
-485|101|O|110432.76|1997-03-26|2-HIGH|Clerk#000000105|0| regular ideas nag thinly furiously s|55.3801|-131.682|55.3801|-131.682|
-486|52|O|185968.15|1996-03-11|4-NOT SPECIFIED|Clerk#000000803|0|riously dolphins. fluffily ironic requ|55.3801|-131.682|55.3801|-131.682|
-487|109|F|48502.79|1992-08-18|1-URGENT|Clerk#000000086|0|ithely unusual courts eat accordi|55.3801|-131.682|55.3801|-131.682|
-512|64|P|124661.48|1995-05-20|5-LOW|Clerk#000000814|0|ding requests. carefully express theodolites was quickly. furious|55.3801|-131.682|55.3801|-131.682|
-513|61|O|63703.92|1995-05-01|2-HIGH|Clerk#000000522|0|regular packages. pinto beans cajole carefully against the even|55.3424|-131.634|55.3424|-131.634|
-514|76|O|104585.77|1996-04-04|2-HIGH|Clerk#000000094|0| cajole furiously. slyly final excuses cajole. slyly special instructions |55.4097|-131.729|55.4097|-131.729|
-515|142|F|153720.22|1993-08-29|4-NOT SPECIFIED|Clerk#000000700|0|eposits are furiously furiously silent pinto beans. pending pack|55.3801|-131.682|55.3801|-131.682|
-516|44|O|10677.86|1998-04-21|2-HIGH|Clerk#000000305|0|lar, unusual platelets are carefully. even courts sleep bold, final pinto bea|55.3801|-131.682|55.3801|-131.682|
-517|10|O|82197.79|1997-04-07|5-LOW|Clerk#000000359|0|slyly pending deposits cajole quickly packages. furiou|55.3462|-131.658|55.3462|-131.658|
-518|145|O|223537.09|1998-02-08|2-HIGH|Clerk#000000768|0| the carefully bold accounts. quickly regular excuses are|55.3801|-131.682|55.3801|-131.682|
-519|64|O|95731.50|1997-10-31|1-URGENT|Clerk#000000985|0|ains doze furiously against the f|55.3801|-131.682|55.3801|-131.682|
-544|94|F|47627.89|1993-02-17|2-HIGH|Clerk#000000145|0|the special, final accounts. dogged dolphins|55.3801|-131.682|55.3801|-131.682|
-545|64|O|23476.12|1995-11-07|2-HIGH|Clerk#000000537|0|as. blithely final hockey players about th|55.3801|-131.682|55.3801|-131.682|
-546|145|O|14790.37|1996-11-01|2-HIGH|Clerk#000000041|0|osits sleep. slyly special dolphins about the q|55.3801|-131.682|55.3801|-131.682|
-547|100|O|96855.29|1996-06-22|3-MEDIUM|Clerk#000000976|0|ing accounts eat. carefully regular packa|55.3801|-131.682|55.3801|-131.682|
-548|124|F|99088.75|1994-09-21|1-URGENT|Clerk#000000435|0|arefully express instru|55.3801|-131.682|55.3801|-131.682|
-549|110|F|141679.41|1992-07-13|1-URGENT|Clerk#000000196|0|ideas alongside of |55.3801|-131.682|55.3801|-131.682|
-550|25|O|33123.28|1995-08-02|1-URGENT|Clerk#000000204|0|t requests. blithely |61.5856|-149.316|61.5856|-149.316|
-551|91|O|46355.83|1995-05-30|1-URGENT|Clerk#000000179|0|xpress accounts boost quic|61.5781|-149.429|61.5781|-149.429|
-576|31|O|18307.45|1997-05-13|3-MEDIUM|Clerk#000000955|0|l requests affix regular requests. final account|61.6141|-149.457|61.6141|-149.457|
-577|56|F|34768.68|1994-12-19|5-LOW|Clerk#000000154|0| deposits engage stealthil|61.5801|-149.461|61.5801|-149.461|
-578|94|O|70392.02|1997-01-10|5-LOW|Clerk#000000281|0|e blithely even packages. slyly pending platelets bes|61.9071|-150.067|61.9071|-150.067|
-579|68|O|120828.12|1998-03-11|2-HIGH|Clerk#000000862|0| regular instructions. blithely even p|61.5928|-149.392|61.5928|-149.392|
-580|61|O|88219.12|1997-07-05|2-HIGH|Clerk#000000314|0|tegrate fluffily regular accou|61.6141|-149.457|61.6141|-149.457|
-581|70|O|126066.00|1997-02-23|4-NOT SPECIFIED|Clerk#000000239|0| requests. even requests use slyly. blithely ironic |61.5792|-149.36|61.5792|-149.36|
-582|50|O|129004.81|1997-10-21|1-URGENT|Clerk#000000378|0|n pinto beans print a|61.6049|-149.463|61.6049|-149.463|
-583|49|O|127817.38|1997-03-19|3-MEDIUM|Clerk#000000792|0|efully express requests. a|61.6099|-149.328|61.6099|-149.328|
-608|26|O|62567.99|1996-02-28|3-MEDIUM|Clerk#000000995|0|nic waters wake slyly slyly expre|61.5531|-149.651|61.5531|-149.651|
-609|127|F|21088.59|1994-06-01|3-MEDIUM|Clerk#000000348|0|- ironic gifts believe furiously ca|61.6141|-149.457|61.6141|-149.457|
-610|52|O|175142.28|1995-08-02|1-URGENT|Clerk#000000610|0|totes. ironic, unusual packag|61.6141|-149.457|61.6141|-149.457|
-611|106|F|73907.63|1993-01-27|1-URGENT|Clerk#000000401|0|ounts detect furiously ac|61.5531|-149.651|61.5531|-149.651|
-612|82|F|145695.42|1992-10-21|3-MEDIUM|Clerk#000000759|0|boost quickly quickly final excuses. final foxes use bravely afte|61.6141|-149.457|61.6141|-149.457|
-613|139|O|33396.35|1995-06-18|2-HIGH|Clerk#000000172|0|ts hinder among the deposits. fluffily ironic depos|61.7321|-150.12|61.7321|-150.12|
-614|134|F|218116.21|1992-12-01|2-HIGH|Clerk#000000388|0| deposits! even, daring theodol|61.6141|-149.457|61.6141|-149.457|
-615|67|F|32890.89|1992-05-09|5-LOW|Clerk#000000388|0|t to promise asymptotes. packages haggle alongside of the fluffil|61.582|-149.441|61.582|-149.441|
-640|97|F|145495.62|1993-01-23|2-HIGH|Clerk#000000433|0|r, unusual accounts boost carefully final ideas. slyly silent theod|61.5818|-149.44|61.5818|-149.44|
-641|133|F|120626.49|1993-08-30|5-LOW|Clerk#000000175|0|ents cajole furiously about the quickly silent pac|61.6141|-149.457|61.6141|-149.457|
-642|40|F|22994.51|1993-12-16|3-MEDIUM|Clerk#000000357|0| among the requests wake slyly alongside of th|61.7321|-150.12|61.7321|-150.12|
-643|58|P|180396.95|1995-03-25|2-HIGH|Clerk#000000354|0|g dependencies. regular accounts |61.6308|-149.415|61.6308|-149.415|
-644|8|F|201268.06|1992-05-01|1-URGENT|Clerk#000000550|0| blithely unusual platelets haggle ironic, special excuses. excuses unwi|61.5801|-149.461|61.5801|-149.461|
-645|115|F|234763.73|1994-12-03|2-HIGH|Clerk#000000090|0|quickly daring theodolites across the regu|61.5811|-149.444|61.5811|-149.444|
-646|52|F|142070.65|1994-11-22|2-HIGH|Clerk#000000203|0|carefully even foxes. fina|61.6521|-149.92|61.6521|-149.92|
-647|143|O|56449.23|1997-08-07|1-URGENT|Clerk#000000270|0|egular pearls. carefully express asymptotes are. even account|61.6141|-149.307|61.6141|-149.307|
-672|109|F|89877.09|1994-04-14|5-LOW|Clerk#000000106|0|egular requests are furiously according to |61.6168|-149.328|61.6168|-149.328|
-673|80|F|21137.08|1994-03-10|1-URGENT|Clerk#000000448|0| special pinto beans use quickly furiously even depende|61.5714|-149.381|61.5714|-149.381|
-674|34|F|27204.60|1992-08-29|5-LOW|Clerk#000000448|0|ully special deposits. furiously final warhorses affix carefully. fluffily f|61.6521|-149.92|61.6521|-149.92|
-675|13|O|125188.72|1997-07-31|2-HIGH|Clerk#000000168|0|ffily between the careful|61.5858|-149.376|61.5858|-149.376|
-676|38|O|163966.67|1996-12-13|2-HIGH|Clerk#000000248|0|the final deposits. special, pending|61.5822|-149.463|61.5822|-149.463|
-677|124|F|147915.68|1993-11-24|3-MEDIUM|Clerk#000000824|0|uriously special pinto beans cajole carefully. fi|61.5861|-149.303|61.5861|-149.303|
-678|131|F|135761.05|1993-02-27|5-LOW|Clerk#000000530|0|. blithely final somas about the|61.5821|-149.438|61.5821|-149.438|
-679|49|O|8945.03|1995-12-15|2-HIGH|Clerk#000000853|0|tealthy, final pinto beans haggle slyly. pending platelets about the special, |61.6281|-149.338|61.6281|-149.338|
-704|85|O|56210.26|1996-11-21|3-MEDIUM|Clerk#000000682|0|blithely pending platelets wake alongside of the final, iron|61.5771|-149.335|61.5771|-149.335|
-705|43|O|83773.49|1997-02-13|4-NOT SPECIFIED|Clerk#000000294|0|ithely regular dependencies. express, even packages sleep slyly pending t|61.5917|-149.464|61.5917|-149.464|
-706|148|O|23973.60|1995-09-09|1-URGENT|Clerk#000000448|0|g the packages. deposits caj|61.1927|-149.86|61.1927|-149.86|
-707|118|F|58218.35|1994-11-20|3-MEDIUM|Clerk#000000199|0| ideas about the silent, bold deposits nag dolphins|61.1879|-149.85|61.1879|-149.85|
-708|32|O|100445.59|1998-07-03|3-MEDIUM|Clerk#000000101|0|lphins cajole about t|61.1814|-149.849|61.1814|-149.849|
-709|37|O|72055.87|1998-04-21|1-URGENT|Clerk#000000461|0|ons alongside of the carefully bold pinto bea|61.2104|-149.892|61.2104|-149.892|
-710|133|F|208974.42|1993-01-02|5-LOW|Clerk#000000026|0| regular, regular requests boost. fluffily re|61.2093|-149.903|61.2093|-149.903|
-711|64|F|92484.70|1993-09-23|4-NOT SPECIFIED|Clerk#000000856|0|its. fluffily regular gifts are furi|61.1481|-149.829|61.1481|-149.829|
-736|47|O|130204.17|1998-06-21|5-LOW|Clerk#000000881|0|refully of the final pi|61.2161|-149.876|61.2161|-149.876|
-737|121|F|12984.85|1992-04-26|5-LOW|Clerk#000000233|0|ake blithely express, ironic theodolites. blithely special accounts wa|61.1972|-149.75|61.1972|-149.75|
-738|22|F|114145.18|1993-03-02|4-NOT SPECIFIED|Clerk#000000669|0|ly even foxes. furiously regular accounts cajole ca|61.2066|-149.887|61.2066|-149.887|
-739|1|O|159171.69|1998-05-31|5-LOW|Clerk#000000900|0| against the slyly ironic packages nag slyly ironic|61.2161|-149.876|61.2161|-149.876|
-740|44|O|83490.99|1995-07-16|3-MEDIUM|Clerk#000000583|0|courts haggle furiously across the final, regul|61.195|-149.834|61.195|-149.834|
-741|106|O|47985.98|1998-07-07|2-HIGH|Clerk#000000295|0|ic instructions. slyly express instructions solv|61.2038|-149.808|61.2038|-149.808|
-742|103|F|207632.55|1994-12-23|5-LOW|Clerk#000000543|0|equests? slyly ironic dolphins boost carefully above the blithely|61.1228|-149.862|61.1228|-149.862|
-743|79|O|23614.89|1996-10-04|4-NOT SPECIFIED|Clerk#000000933|0|eans. furiously ironic deposits sleep carefully carefully qui|61.2005|-149.785|61.2005|-149.785|
-768|98|O|220636.82|1996-08-20|3-MEDIUM|Clerk#000000411|0|jole slyly ironic packages. slyly even idea|61.181|-149.825|61.181|-149.825|
-769|80|F|43092.76|1993-06-02|3-MEDIUM|Clerk#000000172|0|ggle furiously. ironic packages haggle slyly. bold platelets affix s|61.1867|-149.919|61.1867|-149.919|
-770|32|O|64271.75|1998-05-23|5-LOW|Clerk#000000572|0|heodolites. furiously special pinto beans cajole pac|61.1955|-149.911|61.1955|-149.911|
-771|46|O|105302.05|1995-06-17|1-URGENT|Clerk#000000105|0|s. furiously final instructions across the deposit|61.1089|-149.858|61.1089|-149.858|
-772|97|F|128234.96|1993-04-17|2-HIGH|Clerk#000000430|0|s boost blithely fluffily idle ideas? fluffily even pin|61.1805|-149.889|61.1805|-149.889|
-773|133|F|146862.27|1993-09-26|3-MEDIUM|Clerk#000000307|0|tions are quickly accounts. accounts use bold, even pinto beans. gifts ag|61.1534|-149.985|61.1534|-149.985|
-774|80|O|145857.60|1995-12-04|1-URGENT|Clerk#000000883|0|tealthily even depths|61.1901|-149.911|61.1901|-149.911|
-775|134|F|59455.61|1995-03-18|1-URGENT|Clerk#000000191|0|kly express requests. fluffily silent accounts poach furiously|61.2122|-149.734|61.2122|-149.734|
-800|56|O|87892.38|1998-07-14|2-HIGH|Clerk#000000213|0|y alongside of the pending packages? final platelets nag fluffily carefu|61.1951|-149.906|61.1951|-149.906|
-801|118|F|127717.72|1992-02-18|1-URGENT|Clerk#000000186|0|iously from the furiously enticing reques|61.2043|-149.869|61.2043|-149.869|
-802|137|F|156381.95|1995-01-05|1-URGENT|Clerk#000000516|0|posits. ironic, pending requests cajole. even theodol|61.2036|-149.869|61.2036|-149.869|
-803|16|O|27629.66|1997-04-29|5-LOW|Clerk#000000260|0|ic instructions. even deposits haggle furiously at the deposits-- regular de|61.1883|-149.886|61.1883|-149.886|
-804|50|F|94400.43|1993-03-12|3-MEDIUM|Clerk#000000931|0|s. blithely final foxes are about the packag|61.2141|-149.864|61.2141|-149.864|
-805|127|O|90042.41|1995-07-05|4-NOT SPECIFIED|Clerk#000000856|0|y according to the fluffily |61.1955|-149.782|61.1955|-149.782|
-806|131|O|26839.16|1996-06-20|2-HIGH|Clerk#000000240|0| the ironic packages wake carefully fina|61.2183|-149.894|61.2183|-149.894|
-807|145|F|222392.53|1993-11-24|3-MEDIUM|Clerk#000000012|0|refully special tithes. blithely regular accoun|61.1417|-149.864|61.1417|-149.864|
-832|29|F|68494.08|1992-04-19|5-LOW|Clerk#000000495|0|xes. bravely regular packages sleep up the furiously bold accou|61.1883|-149.883|61.1883|-149.883|
-833|56|F|49033.69|1994-02-13|3-MEDIUM|Clerk#000000437|0|ts haggle quickly across the slyl|61.2161|-149.876|61.2161|-149.876|
-834|43|F|46459.92|1994-05-23|3-MEDIUM|Clerk#000000805|0| sleep. quickly even foxes are boldly. slyly express requests use slyly|61.2193|-149.869|61.2193|-149.869|
-835|65|O|62430.67|1995-10-08|4-NOT SPECIFIED|Clerk#000000416|0|s about the carefully special foxes haggle quickly about the|61.2191|-149.888|61.2191|-149.888|
-836|70|O|72843.48|1996-11-25|4-NOT SPECIFIED|Clerk#000000729|0|ely bold excuses sleep regular ideas. furiously unusual ideas wake furiou|61.2191|-149.888|61.2191|-149.888|
-837|116|F|60918.41|1994-06-15|4-NOT SPECIFIED|Clerk#000000563|0|kages sleep slyly above the ironic, final orbits|61.2191|-149.888|61.2191|-149.888|
-838|17|O|82918.36|1998-01-29|5-LOW|Clerk#000000213|0| slyly around the slyly even|61.2191|-149.888|61.2191|-149.888|
-839|28|O|70182.63|1995-08-08|1-URGENT|Clerk#000000951|0|the carefully even platelets. furiously unusual fo|61.2191|-149.888|61.2191|-149.888|
-864|139|O|74710.74|1997-08-17|1-URGENT|Clerk#000000036|0|ly after the slyly regular deposits. express, regular asymptotes nag ca|61.2191|-149.888|61.2191|-149.888|
-865|4|F|70430.54|1993-05-04|3-MEDIUM|Clerk#000000337|0|. special packages wake after the carefully final accounts. express pinto be|61.2191|-149.888|61.2191|-149.888|
-866|40|F|4766.19|1992-11-28|3-MEDIUM|Clerk#000000718|0|ins after the even, even accounts nod blithel|61.2191|-149.888|61.2191|-149.888|
-867|26|F|7471.75|1993-11-16|3-MEDIUM|Clerk#000000877|0|pades nag quickly final, |61.2191|-149.888|61.2191|-149.888|
-868|104|F|127345.45|1992-06-09|4-NOT SPECIFIED|Clerk#000000782|0|onic theodolites print carefully. blithely dogge|61.2191|-149.888|61.2191|-149.888|
-869|136|O|58932.19|1997-01-12|2-HIGH|Clerk#000000245|0|ar sheaves are slowly. slyly even attainments boost theodolites. furiously|61.2191|-149.888|61.2191|-149.888|
-870|34|F|40492.37|1993-06-20|4-NOT SPECIFIED|Clerk#000000123|0|blithely ironic ideas nod. sly, r|61.2191|-149.888|61.2191|-149.888|
-871|16|O|172861.58|1995-11-15|5-LOW|Clerk#000000882|0|oss the ironic theodolites.|61.1891|-149.906|61.1891|-149.906|
-896|2|F|169847.63|1993-03-09|1-URGENT|Clerk#000000187|0|inal packages eat blithely according to the warhorses. furiously quiet de|61.2191|-149.888|61.2191|-149.888|
-897|49|P|57697.44|1995-03-20|1-URGENT|Clerk#000000316|0| wake quickly against |61.2191|-149.888|61.2191|-149.888|
-898|55|F|101020.75|1993-06-03|2-HIGH|Clerk#000000611|0|. unusual pinto beans haggle quickly across |61.1101|-149.857|61.1101|-149.857|
-899|109|O|125562.09|1998-04-08|5-LOW|Clerk#000000575|0|rts engage carefully final theodolites.|61.1101|-149.857|61.1101|-149.857|
-900|46|F|120073.51|1994-10-01|4-NOT SPECIFIED|Clerk#000000060|0| fluffily express deposits nag furiousl|61.1101|-149.857|61.1101|-149.857|
-901|13|O|81826.12|1998-07-21|4-NOT SPECIFIED|Clerk#000000929|0|lyly even foxes are furious, silent requests. requests about the quickly |61.1101|-149.857|61.1101|-149.857|
-902|10|F|37348.62|1994-07-27|4-NOT SPECIFIED|Clerk#000000811|0|yly final requests over the furiously regula|61.1101|-149.857|61.1101|-149.857|
-903|11|O|109351.87|1995-07-07|4-NOT SPECIFIED|Clerk#000000793|0|e slyly about the final pl|61.1101|-149.857|61.1101|-149.857|
-928|67|F|228136.49|1995-03-02|5-LOW|Clerk#000000450|0|ithely express pinto beans. |61.1101|-149.857|61.1101|-149.857|
-929|83|F|109301.02|1992-10-02|2-HIGH|Clerk#000000160|0|its. furiously even foxes affix carefully finally silent accounts. express req|61.1101|-149.857|61.1101|-149.857|
-930|131|F|199102.23|1994-12-17|1-URGENT|Clerk#000000004|0| accounts nag slyly. ironic, ironic accounts wake blithel|61.1101|-149.857|61.1101|-149.857|
-931|103|F|117909.23|1992-12-07|1-URGENT|Clerk#000000881|0|ss packages haggle furiously express, regular deposits. even, e|61.1101|-149.857|61.1101|-149.857|
-932|41|O|40234.50|1997-05-16|2-HIGH|Clerk#000000218|0|ly express instructions boost furiously reg|61.1101|-149.857|61.1101|-149.857|
-933|97|F|71349.30|1992-08-05|4-NOT SPECIFIED|Clerk#000000752|0|ial courts wake permanently against the furiously regular ideas. unusual |61.1101|-149.857|61.1101|-149.857|
-934|52|O|17213.59|1996-07-03|1-URGENT|Clerk#000000229|0|ts integrate carefully. sly, regular deposits af|61.1101|-149.857|61.1101|-149.857|
-935|50|O|97733.87|1997-09-24|5-LOW|Clerk#000000180|0|iously final deposits cajole. blithely even packages |61.1101|-149.857|61.1101|-149.857|
-960|35|F|63537.13|1994-09-21|3-MEDIUM|Clerk#000000120|0|regular accounts. requests|61.1101|-149.857|61.1101|-149.857|
-961|56|P|158893.16|1995-06-04|4-NOT SPECIFIED|Clerk#000000720|0|ons nag furiously among the quickl|61.1101|-149.857|61.1101|-149.857|
-962|37|F|98258.73|1994-05-06|5-LOW|Clerk#000000463|0|ments nag deposits. fluffily ironic a|61.1101|-149.857|61.1101|-149.857|
-963|26|F|53287.25|1994-05-26|3-MEDIUM|Clerk#000000497|0|uses haggle carefully. slyly even dependencies after the packages ha|61.1101|-149.857|61.1101|-149.857|
-964|76|O|131146.47|1995-05-20|3-MEDIUM|Clerk#000000657|0|print blithely ironic, careful theodolit|61.1101|-149.857|61.1101|-149.857|
-965|70|P|41758.44|1995-05-15|5-LOW|Clerk#000000218|0|iously special packages. slyly pending requests are carefully |64.8591|-147.917|64.8591|-147.917|
-966|14|O|120516.93|1998-04-30|2-HIGH|Clerk#000000239|0|special deposits. furious|64.8273|-147.715|64.8273|-147.715|
-967|110|F|179287.95|1992-06-21|3-MEDIUM|Clerk#000000167|0|excuses engage quickly bold dep|64.8281|-147.715|64.8281|-147.715|
-992|55|O|133665.12|1997-11-11|3-MEDIUM|Clerk#000000875|0|ts. regular pinto beans thrash carefully sl|64.8552|-147.763|64.8552|-147.763|
-993|80|O|198238.65|1995-09-10|3-MEDIUM|Clerk#000000894|0|quickly express accounts among the furiously bol|64.8481|-147.684|64.8481|-147.684|
-994|2|F|41433.48|1994-04-20|5-LOW|Clerk#000000497|0|ole. slyly bold excuses nag caref|64.8522|-147.773|64.8522|-147.773|
-995|116|P|135157.92|1995-05-31|3-MEDIUM|Clerk#000000439|0|deas. blithely final deposits play. express accounts wake blithely caref|64.8467|-147.703|64.8467|-147.703|
-996|71|O|47447.63|1997-12-29|1-URGENT|Clerk#000000497|0|arefully final packages into the slyly final requests affix blit|64.8963|-147.662|64.8963|-147.662|
-997|109|O|27561.82|1997-05-19|2-HIGH|Clerk#000000651|0|ly express depths. furiously final requests haggle furiously. carefu|64.8372|-147.796|64.8372|-147.796|
-998|32|F|65269.38|1994-11-26|4-NOT SPECIFIED|Clerk#000000956|0|ronic dolphins. ironic, bold ideas haggle furiously furious|64.8312|-147.716|64.8312|-147.716|
-999|61|F|145249.13|1993-09-05|5-LOW|Clerk#000000464|0|pitaphs sleep. regular accounts use. f|64.811|-147.71|64.811|-147.71|
-1024|4|O|176084.63|1997-12-23|5-LOW|Clerk#000000903|0| blithely. even, express theodolites cajole slyly across|64.8971|-147.663|64.8971|-147.663|
-1025|103|F|82034.03|1995-05-05|2-HIGH|Clerk#000000376|0|ross the slyly final pa|64.85|-147.699|64.85|-147.699|
-1026|73|O|36464.76|1997-06-04|5-LOW|Clerk#000000223|0|s wake blithely. special acco|64.8389|-147.743|64.8389|-147.743|
-1027|128|F|112770.89|1992-06-03|3-MEDIUM|Clerk#000000241|0|equests cajole. slyly final pinto bean|64.781|-148|64.781|-148|
-1028|70|F|153864.67|1994-01-01|2-HIGH|Clerk#000000131|0|ts are. final, silent deposits are among the fl|64.8377|-147.718|64.8377|-147.718|
-1029|130|F|47440.91|1994-06-21|2-HIGH|Clerk#000000700|0|quests sleep. slyly even foxes wake quickly final theodolites. clo|64.8248|-147.886|64.8248|-147.886|
-1030|134|F|16346.94|1994-06-15|5-LOW|Clerk#000000422|0|ully ironic accounts sleep carefully. requests are carefully alongside of the |64.818|-147.679|64.818|-147.679|
-1031|4|F|128024.71|1994-09-01|3-MEDIUM|Clerk#000000448|0|s; ironic theodolites along the carefully ex|64.8271|-147.79|64.8271|-147.79|
-1056|28|F|38446.39|1995-02-11|1-URGENT|Clerk#000000125|0|t, even deposits hang about the slyly special i|64.8451|-147.812|64.8451|-147.812|
-1057|76|F|108107.42|1992-02-20|1-URGENT|Clerk#000000124|0|cuses dazzle carefully careful, ironic pinto beans. carefully even theod|64.8311|-147.729|64.8311|-147.729|
-1058|53|F|89359.11|1993-04-26|3-MEDIUM|Clerk#000000373|0|kly pending courts haggle. blithely regular sheaves integrate carefully fi|64.8454|-147.855|64.8454|-147.855|
-1059|127|F|198360.22|1994-02-27|1-URGENT|Clerk#000000104|0|en accounts. carefully bold packages cajole daringly special depende|64.8302|-147.744|64.8302|-147.744|
-1060|140|F|121994.04|1993-02-21|3-MEDIUM|Clerk#000000989|0|l platelets sleep quickly slyly special requests. furiously |64.8113|-147.91|64.8113|-147.91|
-1061|103|O|166947.75|1998-05-15|5-LOW|Clerk#000000576|0|uests sleep at the packages. fur|64.8271|-147.789|64.8271|-147.789|
-1062|106|O|39805.04|1997-01-15|1-URGENT|Clerk#000000152|0|eposits use blithely |64.8451|-147.698|64.8451|-147.698|
-1063|37|F|41392.31|1994-04-02|2-HIGH|Clerk#000000024|0|deposits nag quickly regular deposits. quickl|64.8586|-147.69|64.8586|-147.69|
-1088|148|F|47120.41|1992-05-21|5-LOW|Clerk#000000347|0|counts are blithely. platelets print. carefully |64.8507|-147.702|64.8507|-147.702|
-1089|49|O|103192.74|1996-05-04|4-NOT SPECIFIED|Clerk#000000226|0|ns haggle ruthlessly. even requests are quickly abov|64.8371|-147.716|64.8371|-147.716|
-1090|19|O|32929.30|1997-11-15|2-HIGH|Clerk#000000300|0| furiously regular platelets haggle along the slyly unusual foxes! |64.8449|-147.743|64.8449|-147.743|
-1091|83|O|35795.22|1996-08-27|1-URGENT|Clerk#000000549|0| even pinto beans haggle quickly alongside of the eve|64.8475|-147.706|64.8475|-147.706|
-1092|124|P|85552.21|1995-03-04|3-MEDIUM|Clerk#000000006|0|re quickly along the blithe|64.8452|-147.714|64.8452|-147.714|
-1093|101|O|79189.58|1997-07-31|4-NOT SPECIFIED|Clerk#000000159|0| after the carefully ironic requests. carefully ironic packages wake fluffil|64.8125|-147.787|64.8125|-147.787|
-1094|145|O|9006.25|1997-12-24|3-MEDIUM|Clerk#000000570|0|beans affix furiously about the pending, even deposits. finally pendi|55.3801|-131.682|55.3801|-131.682|
-1095|145|O|178491.24|1995-08-22|3-MEDIUM|Clerk#000000709|0|sly bold requests cajole carefully according to|55.3801|-131.682|55.3801|-131.682|
-1120|140|O|107958.62|1997-11-07|3-MEDIUM|Clerk#000000319|0|lly special requests. slyly pending platelets are quickly pending requ|55.3801|-131.682|55.3801|-131.682|
-1121|29|O|241837.88|1997-01-13|3-MEDIUM|Clerk#000000541|0|r escapades. deposits above the fluffily bold requests hag|55.3801|-131.682|55.3801|-131.682|
-1122|121|O|179747.47|1997-01-10|1-URGENT|Clerk#000000083|0|uffily carefully final theodolites. furiously express packages affix|55.3801|-131.682|55.3801|-131.682|
-1123|73|O|93259.93|1996-08-03|3-MEDIUM|Clerk#000000929|0|uriously pending requests. slyly regular instruction|55.3801|-131.682|55.3801|-131.682|
-1124|80|O|141858.97|1998-07-30|5-LOW|Clerk#000000326|0|regular pinto beans along the fluffily silent packages|55.3599|-131.687|55.3599|-131.687|
-1125|25|F|80438.38|1994-10-27|2-HIGH|Clerk#000000510|0|ithely final requests. i|55.4381|-131.803|55.4381|-131.803|
-1126|145|O|59982.31|1998-01-28|4-NOT SPECIFIED|Clerk#000000928|0|d slyly regular ideas: special ideas believe slyly. slyly ironic sheaves w|55.3751|-131.718|55.3751|-131.718|
-1127|58|O|103320.91|1995-09-19|4-NOT SPECIFIED|Clerk#000000397|0|usly silent, regular pinto beans. blithely express requests boos|55.3421|-131.641|55.3421|-131.641|
-1152|49|F|51775.54|1994-08-14|4-NOT SPECIFIED|Clerk#000000496|0|equests. deposits ab|55.3408|-131.64|55.3408|-131.64|
-1153|121|O|220727.97|1996-04-18|5-LOW|Clerk#000000059|0| across the pending deposi|55.2978|-131.534|55.2978|-131.534|
-1154|37|F|192417.85|1992-02-15|1-URGENT|Clerk#000000268|0|old asymptotes are special requests. blithely even deposits sleep furiously|55.3801|-131.682|55.3801|-131.682|
-1155|149|O|126902.81|1997-10-06|2-HIGH|Clerk#000000164|0|c deposits haggle among the ironic, even requests. carefully ironic sheaves n|55.3801|-131.682|55.3801|-131.682|
-1156|133|O|217682.81|1996-10-19|1-URGENT|Clerk#000000200|0| blithely ironic dolphins. furiously pendi|55.3421|-131.622|55.3421|-131.622|
-1157|97|O|85394.06|1998-01-14|4-NOT SPECIFIED|Clerk#000000207|0|out the regular excuses boost carefully against the furio|55.3801|-131.682|55.3801|-131.682|
-1158|142|O|31075.51|1996-06-30|2-HIGH|Clerk#000000549|0|integrate slyly furiously ironic deposit|55.3801|-131.682|55.3801|-131.682|
-1159|70|F|55553.68|1992-09-18|3-MEDIUM|Clerk#000000992|0|ts may sleep. requests according to the|55.3801|-131.682|55.3801|-131.682|
-1184|89|O|39700.29|1997-10-26|5-LOW|Clerk#000000777|0|iously even packages haggle fluffily care|55.3267|-131.523|55.3267|-131.523|
-1185|74|F|47033.21|1992-08-24|5-LOW|Clerk#000000344|0| even escapades are. package|55.3522|-131.685|55.3522|-131.685|
-1186|59|O|82026.18|1996-08-15|4-NOT SPECIFIED|Clerk#000000798|0|ingly regular pinto beans: instructi|55.5351|-133.014|55.5351|-133.014|
-1187|134|F|85948.02|1992-11-20|3-MEDIUM|Clerk#000000047|0|s after the furiously final deposits boost slyly under the|55.5351|-133.014|55.5351|-133.014|
-1188|20|O|54655.07|1996-04-11|2-HIGH|Clerk#000000256|0|ully ironic deposits. slyl|55.5351|-133.014|55.5351|-133.014|
-1189|46|F|71017.99|1994-04-09|1-URGENT|Clerk#000000243|0|f the even accounts. courts print blithely ironic accounts. sile|55.5351|-133.014|55.5351|-133.014|
-1190|13|O|31043.39|1997-03-16|5-LOW|Clerk#000000575|0|ccounts above the foxes integrate carefully after the |55.5351|-133.014|55.5351|-133.014|
-1191|112|O|28623.04|1995-11-07|3-MEDIUM|Clerk#000000011|0|uests nag furiously. carefully even requests|55.4691|-132.855|55.4691|-132.855|
-1216|122|F|68056.57|1992-12-07|5-LOW|Clerk#000000918|0|nal foxes around the e|55.5511|-133.081|55.5511|-133.081|
-1217|7|F|40982.08|1992-04-26|4-NOT SPECIFIED|Clerk#000000538|0| foxes nag quickly. ironic excuses nod. blithely pending|55.5351|-133.014|55.5351|-133.014|
-1218|10|F|99834.47|1994-06-20|4-NOT SPECIFIED|Clerk#000000994|0|s cajole. special, silent deposits about the theo|55.5531|-133.097|55.5531|-133.097|
-1219|28|O|10163.56|1995-10-05|3-MEDIUM|Clerk#000000800|0|od carefully. slyly final dependencies across the even fray|55.5351|-133.014|55.5351|-133.014|
-1220|49|O|122157.14|1996-08-29|1-URGENT|Clerk#000000712|0|inal theodolites wake. fluffily ironic asymptotes cajol|55.4726|-131.793|55.4726|-131.793|
-1221|14|F|117397.16|1992-04-19|4-NOT SPECIFIED|Clerk#000000852|0| detect against the silent, even deposits. carefully ironic|55.3801|-131.682|55.3801|-131.682|
-1222|10|F|47623.94|1993-02-05|3-MEDIUM|Clerk#000000811|0|theodolites use quickly even accounts. carefully final asympto|55.3801|-131.682|55.3801|-131.682|
-1223|10|O|26714.67|1996-05-25|4-NOT SPECIFIED|Clerk#000000238|0|posits was blithely fr|55.3801|-131.682|55.3801|-131.682|
-1248|49|F|210713.88|1992-01-02|1-URGENT|Clerk#000000890|0|t the carefully regular dugouts. s|61.5745|-149.562|61.5745|-149.562|
-1249|149|F|45889.09|1994-01-05|1-URGENT|Clerk#000000095|0|al ideas sleep above the pending pin|61.7321|-150.12|61.7321|-150.12|
-1250|37|F|12907.62|1992-09-29|4-NOT SPECIFIED|Clerk#000000652|0|ts after the fluffily pending instructions use slyly about the s|61.5421|-149.419|61.5421|-149.419|
-1251|38|O|109536.55|1997-10-30|1-URGENT|Clerk#000000276|0|, brave sauternes. deposits boost fluffily.|61.5722|-149.702|61.5722|-149.702|
-1252|149|O|93403.05|1997-08-04|5-LOW|Clerk#000000348|0|ng the slyly regular excuses. special courts nag furiously blithely e|61.5743|-149.405|61.5743|-149.405|
-1253|115|F|92730.74|1993-01-26|1-URGENT|Clerk#000000775|0| requests sleep furiously even foxes. ruthless packag|61.578|-149.441|61.578|-149.441|
-1254|70|O|94649.25|1995-12-22|1-URGENT|Clerk#000000607|0| pinto beans. carefully regular request|61.5826|-149.427|61.5826|-149.427|
-1255|122|F|62518.31|1994-05-30|4-NOT SPECIFIED|Clerk#000000798|0|ct slyly regular accounts. quick|61.5586|-149.351|61.5586|-149.351|
-1280|97|F|91664.85|1993-01-11|5-LOW|Clerk#000000160|0|posits thrash quickly after the theodolites. furiously iro|61.5844|-149.442|61.5844|-149.442|
-1281|62|F|165454.51|1994-12-11|1-URGENT|Clerk#000000430|0|counts. carefully pending accounts eat |61.5817|-149.472|61.5817|-149.472|
-1282|116|F|61297.42|1992-02-29|4-NOT SPECIFIED|Clerk#000000168|0|he quickly special packages. furiously final re|61.6141|-149.457|61.6141|-149.457|
-1283|118|O|202623.92|1996-08-30|4-NOT SPECIFIED|Clerk#000000260|0| pinto beans boost slyly ac|61.5761|-149.602|61.5761|-149.602|
-1284|134|O|106122.38|1996-01-07|2-HIGH|Clerk#000000492|0|s. blithely silent deposits s|61.6141|-149.457|61.6141|-149.457|
-1285|11|F|139124.72|1992-06-01|1-URGENT|Clerk#000000423|0|cial deposits cajole after the ironic requests. p|61.58|-149.434|61.58|-149.434|
-1286|109|F|207291.83|1993-05-14|4-NOT SPECIFIED|Clerk#000000939|0| deposits use carefully from the excuses. slyly bold p|61.6002|-149.429|61.6002|-149.429|
-1287|19|F|131432.42|1994-07-05|2-HIGH|Clerk#000000288|0|ly ironic dolphins integrate furiously among the final packages. st|61.569|-149.347|61.569|-149.347|
-1312|112|F|58111.00|1994-05-19|3-MEDIUM|Clerk#000000538|0|n, express accounts across the ironic|61.5812|-149.448|61.5812|-149.448|
-1313|148|F|46598.65|1994-09-13|1-URGENT|Clerk#000000774|0|ld accounts. regular deposits cajole. ironically pending theodolites use car|61.6141|-149.457|61.6141|-149.457|
-1314|143|F|56207.66|1994-05-13|3-MEDIUM|Clerk#000000485|0|ickly blithe packages nod ideas. furiously bold braids boost around the car|61.6141|-149.457|61.6141|-149.457|
-1315|22|O|121935.23|1998-03-22|5-LOW|Clerk#000000840|0|final theodolites alongside of the carefu|61.6141|-149.457|61.6141|-149.457|
-1316|16|F|163746.47|1993-12-03|1-URGENT|Clerk#000000857|0|ully bold theodolites? pending, bold pin|61.5969|-149.367|61.5969|-149.367|
-1317|100|P|139714.71|1995-05-19|2-HIGH|Clerk#000000373|0|sts. furiously special deposits lose fur|61.58|-149.4|61.58|-149.4|
-1318|128|O|81663.65|1998-06-27|3-MEDIUM|Clerk#000000581|0|s hang bold requests. pending, re|61.5848|-149.445|61.5848|-149.445|
-1319|32|O|31103.83|1996-09-27|2-HIGH|Clerk#000000257|0|y across the ruthlessly ironic accounts. unusu|61.5811|-149.444|61.5811|-149.444|
-1344|17|F|43809.37|1992-04-16|5-LOW|Clerk#000000178|0|omise close, silent requests. pending theodolites boost pending |61.5733|-149.389|61.5733|-149.389|
-1345|95|F|111207.93|1992-10-28|5-LOW|Clerk#000000447|0| regular tithes. quickly fluffy de|61.6141|-149.457|61.6141|-149.457|
-1346|76|F|171975.62|1992-06-18|2-HIGH|Clerk#000000374|0|ges sleep quickly-- even pint|61.5952|-149.436|61.5952|-149.436|
-1347|41|O|173444.60|1997-06-20|5-LOW|Clerk#000000977|0|he furiously even foxes use carefully express req|61.5421|-149.419|61.5421|-149.419|
-1348|19|O|94135.77|1998-04-18|5-LOW|Clerk#000000206|0|tly. quickly even deposi|61.5783|-149.362|61.5783|-149.362|
-1349|64|O|46376.09|1997-10-26|1-URGENT|Clerk#000000543|0|yly! blithely special theodolites cajole. unusual, reg|61.7321|-150.12|61.7321|-150.12|
-1350|52|F|49305.98|1993-08-24|1-URGENT|Clerk#000000635|0|iously about the blithely special a|61.5691|-149.328|61.5691|-149.328|
-1351|106|O|24637.96|1998-04-20|1-URGENT|Clerk#000000012|0| cajole. regular, special re|61.6141|-149.457|61.6141|-149.457|
-1376|47|O|23984.88|1997-05-04|4-NOT SPECIFIED|Clerk#000000730|0|der furiously final, final frets. carefull|61.5819|-149.3|61.5819|-149.3|
-1377|20|O|108334.30|1998-04-24|4-NOT SPECIFIED|Clerk#000000625|0|lly across the blithely express accounts. ironic excuses promise carefully de|61.6431|-149.289|61.6431|-149.289|
-1378|20|O|118495.12|1996-03-09|4-NOT SPECIFIED|Clerk#000000705|0| furiously even tithes cajole slyly among the quick|61.6431|-149.292|61.6431|-149.292|
-1379|65|O|84627.76|1998-05-25|5-LOW|Clerk#000000861|0|y deposits are caref|61.6228|-149.313|61.6228|-149.313|
-1380|137|O|94969.41|1996-07-07|3-MEDIUM|Clerk#000000969|0|inal deposits wake slyly daringly even requests. bold, even foxe|61.2125|-149.894|61.2125|-149.894|
-1381|127|O|58212.22|1998-05-25|3-MEDIUM|Clerk#000000107|0|even requests breach after the bold, ironic instructions. slyly even|61.1879|-149.886|61.1879|-149.886|
-1382|133|F|173522.71|1993-08-17|5-LOW|Clerk#000000241|0|fully final packages sl|61.1594|-149.835|61.1594|-149.835|
-1383|121|F|34797.72|1993-04-27|2-HIGH|Clerk#000000785|0|ts. express requests sleep blithel|61.2123|-149.854|61.2123|-149.854|
-1408|55|O|183965.61|1997-12-26|4-NOT SPECIFIED|Clerk#000000942|0|t the quickly final asymptotes. unusual|61.1951|-149.945|61.1951|-149.945|
-1409|143|F|72440.52|1992-12-31|4-NOT SPECIFIED|Clerk#000000065|0|ructions. furiously unusual excuses are regular, unusual theodolites. fin|61.2138|-149.856|61.2138|-149.856|
-1410|113|O|114879.19|1997-04-12|5-LOW|Clerk#000000123|0|iously along the bravely regular dolphins. pinto beans cajole furiously sp|61.1255|-149.864|61.1255|-149.864|
-1411|95|F|164462.61|1994-12-21|2-HIGH|Clerk#000000566|0|s. furiously special excuses across the pending pinto beans haggle sp|61.2066|-149.808|61.2066|-149.808|
-1412|53|F|78676.54|1993-03-13|4-NOT SPECIFIED|Clerk#000000083|0|uffily daring theodolit|61.2138|-149.896|61.2138|-149.896|
-1413|91|O|75733.58|1997-06-14|3-MEDIUM|Clerk#000000342|0|, ironic instructions. carefully even packages dazzle|61.2161|-149.876|61.2161|-149.876|
-1414|77|O|38057.81|1995-08-16|1-URGENT|Clerk#000000883|0|ccounts. ironic foxes haggle car|61.1594|-149.888|61.1594|-149.888|
-1415|79|F|24654.79|1994-05-29|4-NOT SPECIFIED|Clerk#000000601|0|rays. blithely final ideas affix quickl|61.1806|-149.775|61.1806|-149.775|
-1440|98|O|50201.16|1995-08-10|5-LOW|Clerk#000000956|0| pending requests. closely s|61.1101|-149.857|61.1101|-149.857|
-1441|122|O|156477.94|1997-03-06|4-NOT SPECIFIED|Clerk#000000156|0|ter the excuses. ironic dependencies m|61.1541|-149.958|61.1541|-149.958|
-1442|112|F|7108.12|1994-07-05|4-NOT SPECIFIED|Clerk#000000935|0|nal pinto beans. slyly ironic ideas cajol|61.1268|-149.947|61.1268|-149.947|
-1443|44|O|44672.03|1996-12-16|5-LOW|Clerk#000000185|0|x blithely against the carefully final somas. even asymptotes are. quickly spe|61.0931|-149.785|61.0931|-149.785|
-1444|134|F|207907.60|1994-12-06|3-MEDIUM|Clerk#000000783|0|ove the bold accounts cajole fluffily about|61.1901|-149.892|61.1901|-149.892|
-1445|115|F|154653.32|1995-01-10|3-MEDIUM|Clerk#000000211|0|even packages wake fluffily |61.2183|-149.889|61.2183|-149.889|
-1446|41|O|27663.16|1998-02-16|5-LOW|Clerk#000000274|0|lly regular notornis above the requests sleep final accounts! |61.2164|-149.882|61.2164|-149.882|
-1447|91|F|108171.38|1992-10-15|2-HIGH|Clerk#000000880|0|inly against the blithely pending excuses. regular, pe|61.2161|-149.876|61.2161|-149.876|
-1472|149|O|65331.05|1996-10-06|5-LOW|Clerk#000000303|0|y special dolphins around the final dependencies wake quick|61.219|-149.792|61.219|-149.792|
-1473|94|O|80624.38|1997-03-17|3-MEDIUM|Clerk#000000960|0|furiously close accoun|61.2188|-149.892|61.2188|-149.892|
-1474|70|F|51697.18|1995-01-09|1-URGENT|Clerk#000000438|0|detect quickly above the carefully even |61.2143|-149.837|61.2143|-149.837|
-1475|5|O|185496.66|1997-11-12|2-HIGH|Clerk#000000972|0|cally final packages boost. blithely ironic packa|61.1608|-149.835|61.1608|-149.835|
-1476|145|O|18795.62|1996-06-27|2-HIGH|Clerk#000000673|0|ding accounts hinder alongside of the quickly pending requests. fluf|61.1886|-149.944|61.1886|-149.944|
-1477|76|O|231831.35|1997-08-24|5-LOW|Clerk#000000612|0|ly bold foxes. final ideas would cajo|61.1201|-149.89|61.1201|-149.89|
-1478|50|O|20791.50|1997-08-03|2-HIGH|Clerk#000000827|0|lessly. carefully express|61.1201|-149.89|61.1201|-149.89|
-1479|16|O|31471.04|1995-12-16|4-NOT SPECIFIED|Clerk#000000697|0|he furiously even foxes. thinly bold deposits|61.1585|-149.872|61.1585|-149.872|
-1504|2|F|89399.40|1992-08-28|3-MEDIUM|Clerk#000000381|0|, brave deposits. bold de|61.195|-149.892|61.195|-149.892|
-1505|37|F|55892.35|1992-08-21|2-HIGH|Clerk#000000544|0|s. slyly ironic packages cajole. carefully regular packages haggle |61.0895|-149.694|61.0895|-149.694|
-1506|148|F|195844.84|1992-09-21|3-MEDIUM|Clerk#000000620|0| dependencies. accounts affix blithely slowly unusual deposits. slyly regular |61.2201|-149.831|61.2201|-149.831|
-1507|121|F|96166.92|1993-10-14|3-MEDIUM|Clerk#000000305|0|stealthy, ironic de|61.1663|-149.867|61.1663|-149.867|
-1508|103|O|151282.65|1998-04-10|5-LOW|Clerk#000000117|0| after the furiously regular pinto beans hang slyly quickly ironi|61.2138|-149.906|61.2138|-149.906|
-1509|64|F|180455.98|1993-07-08|5-LOW|Clerk#000000770|0|the regular ideas. regul|61.2193|-149.902|61.2193|-149.902|
-1510|53|O|154590.05|1996-09-17|5-LOW|Clerk#000000128|0|ld carefully. furiously final asymptotes haggle furiously|61.1201|-149.89|61.1201|-149.89|
-1511|79|O|59651.38|1996-12-22|4-NOT SPECIFIED|Clerk#000000386|0|ts above the depend|61.1601|-149.984|61.1601|-149.984|
-1536|94|O|5184.26|1997-01-26|3-MEDIUM|Clerk#000000117|0|ges are! furiously final deposits cajole iron|61.1101|-149.857|61.1101|-149.857|
-1537|109|F|108317.51|1992-02-15|4-NOT SPECIFIED|Clerk#000000862|0|g to the even deposits. ironic, final packages |61.1101|-149.857|61.1101|-149.857|
-1538|29|O|179554.41|1995-06-18|4-NOT SPECIFIED|Clerk#000000258|0| instructions. regular theod|61.1101|-149.857|61.1101|-149.857|
-1539|112|F|39612.63|1995-03-10|5-LOW|Clerk#000000840|0|nstructions boost pa|61.1101|-149.857|61.1101|-149.857|
-1540|16|F|128014.15|1992-08-05|2-HIGH|Clerk#000000927|0|r ideas hinder blithe|61.1101|-149.857|61.1101|-149.857|
-1541|94|P|47286.32|1995-05-18|1-URGENT|Clerk#000000906|0|y. slyly ironic warhorses around the furiously regul|61.1101|-149.857|61.1101|-149.857|
-1542|143|F|132972.24|1993-09-15|3-MEDIUM|Clerk#000000435|0|t the furiously close deposits do was f|61.1101|-149.857|61.1101|-149.857|
-1543|52|O|139047.22|1997-02-20|1-URGENT|Clerk#000000398|0|unts. furiously pend|61.1101|-149.857|61.1101|-149.857|
-1568|17|O|76119.72|1997-01-30|4-NOT SPECIFIED|Clerk#000000554|0|d notornis. carefully |61.1101|-149.857|61.1101|-149.857|
-1569|104|O|87803.55|1998-04-02|5-LOW|Clerk#000000786|0|orbits. fluffily even decoys serve blithely. furiously furious realms nag acro|61.1101|-149.857|61.1101|-149.857|
-1570|124|O|35589.57|1998-03-16|1-URGENT|Clerk#000000745|0|pinto beans haggle furiousl|61.1101|-149.857|61.1101|-149.857|
-1571|103|F|151404.78|1992-12-05|2-HIGH|Clerk#000000565|0|ously furiously bold warthogs. slyly ironic instructions are quickly a|61.1101|-149.857|61.1101|-149.857|
-1572|11|O|47232.79|1996-02-24|2-HIGH|Clerk#000000994|0|fluffily ironic accounts haggle blithely final platelets! slyly regular foxes|61.1101|-149.857|61.1101|-149.857|
-1573|148|F|86918.57|1992-12-28|2-HIGH|Clerk#000000940|0|ess, ironic deposits use along the carefu|61.1101|-149.857|61.1101|-149.857|
-1574|134|O|179923.54|1996-12-12|3-MEDIUM|Clerk#000000809|0| ideas hinder after the carefully unusual |61.1101|-149.857|61.1101|-149.857|
-1575|145|O|197031.52|1995-09-13|3-MEDIUM|Clerk#000000497|0|. furiously regular dep|61.1101|-149.857|61.1101|-149.857|
-1600|94|F|130515.61|1993-03-03|3-MEDIUM|Clerk#000000627|0|tions cajole quietly above the regular, silent requests. slyly fin|61.1101|-149.857|61.1101|-149.857|
-1601|53|F|73962.95|1994-08-27|5-LOW|Clerk#000000469|0|ent deposits are ca|61.1101|-149.857|61.1101|-149.857|
-1602|1|F|4225.26|1993-08-05|5-LOW|Clerk#000000660|0|deposits. busily silent instructions haggle furiously. fin|61.1101|-149.857|61.1101|-149.857|
-1603|2|F|29305.47|1993-07-31|4-NOT SPECIFIED|Clerk#000000869|0|s. slyly silent deposits boo|61.1101|-149.857|61.1101|-149.857|
-1604|113|F|107139.29|1993-07-17|5-LOW|Clerk#000000512|0|lithely silent waters. blithely unusual packages alongside |61.1101|-149.857|61.1101|-149.857|
-1605|58|O|130687.64|1998-04-24|4-NOT SPECIFIED|Clerk#000000616|0|sleep furiously? ruthless, even pinto beans |61.1101|-149.857|61.1101|-149.857|
-1606|53|O|115877.40|1997-04-17|4-NOT SPECIFIED|Clerk#000000550|0|r requests. quickly even platelets breach before the ironically|61.1101|-149.857|61.1101|-149.857|
-1607|149|O|166335.03|1995-12-16|2-HIGH|Clerk#000000498|0| bold, pending foxes haggle. slyly silent |61.1101|-149.857|61.1101|-149.857|
-1632|67|O|183286.33|1997-01-08|3-MEDIUM|Clerk#000000351|0|onic requests are accounts. bold a|61.1101|-149.857|61.1101|-149.857|
-1633|16|O|52359.51|1995-10-14|2-HIGH|Clerk#000000666|0|y silent accounts sl|61.1101|-149.857|61.1101|-149.857|
-1634|70|O|145898.47|1996-09-10|1-URGENT|Clerk#000000360|0|arefully blithely ironic requests. slyly unusual instructions alongside|61.1101|-149.857|61.1101|-149.857|
-1635|4|O|70232.26|1997-02-13|3-MEDIUM|Clerk#000000958|0|s. slyly ironic requests affix slyly |61.1101|-149.857|61.1101|-149.857|
-1636|79|O|172021.87|1997-06-17|3-MEDIUM|Clerk#000000457|0|ding requests. slyly ironic courts wake quickl|61.1101|-149.857|61.1101|-149.857|
-1637|73|F|180912.15|1995-02-08|4-NOT SPECIFIED|Clerk#000000189|0| final accounts. blithely silent ideas cajole bravely. carefully express |61.1101|-149.857|61.1101|-149.857|
-1638|139|O|172436.30|1997-08-13|2-HIGH|Clerk#000000643|0|he fluffily regular asymp|61.1101|-149.857|61.1101|-149.857|
-1639|5|O|104166.56|1995-08-20|4-NOT SPECIFIED|Clerk#000000939|0|haggle furiously. final requests detect furious|61.1101|-149.857|61.1101|-149.857|
-1664|64|O|178060.22|1996-03-03|1-URGENT|Clerk#000000090|0|y quickly even asymptotes. furiously regular packages haggle quickly fin|61.1101|-149.857|61.1101|-149.857|
-1665|76|F|4819.91|1994-05-08|2-HIGH|Clerk#000000920|0|ly regular packages are fluffily even ideas. fluffily final|61.1101|-149.857|61.1101|-149.857|
-1666|95|O|128367.97|1995-10-18|1-URGENT|Clerk#000000849|0|ffily pending dependencies wake fluffily. pending, final accounts |61.1101|-149.857|61.1101|-149.857|
-1667|5|O|125030.37|1997-10-10|2-HIGH|Clerk#000000103|0|e accounts. slyly express accounts must are a|64.8459|-147.759|64.8459|-147.759|
-1668|142|O|137576.19|1997-07-12|4-NOT SPECIFIED|Clerk#000000148|0|eodolites. carefully dogged dolphins haggle q|64.8426|-147.725|64.8426|-147.725|
-1669|2|O|24362.39|1997-06-09|3-MEDIUM|Clerk#000000663|0|er ironic requests detect furiously blithely sp|64.9401|-147.402|64.9401|-147.402|
-1670|25|O|89999.72|1997-05-24|2-HIGH|Clerk#000000320|0|unusual dependencies. furiously special platelets main|64.9401|-147.402|64.9401|-147.402|
-1671|35|O|104391.11|1996-07-27|4-NOT SPECIFIED|Clerk#000000275|0|ly. slyly pending requests was above the |64.8331|-147.647|64.8331|-147.647|
-1696|4|O|102665.03|1998-01-08|4-NOT SPECIFIED|Clerk#000000041|0|bravely bold accounts above the quickly bold|64.8371|-147.716|64.8371|-147.716|
-1697|76|O|122621.31|1996-10-07|1-URGENT|Clerk#000000815|0|o x-ray blithely. pl|64.8574|-147.759|64.8574|-147.759|
-1698|40|O|141118.87|1997-04-23|2-HIGH|Clerk#000000432|0|slyly. carefully express deposit|64.836|-147.727|64.836|-147.727|
-1699|85|F|66408.29|1993-12-30|1-URGENT|Clerk#000000125|0|jole blithely. furiously un|64.8132|-147.76|64.8132|-147.76|
-1700|65|O|89143.36|1996-06-15|3-MEDIUM|Clerk#000000328|0|ely final dolphins wake sometimes above the quietly regular deposits. fur|64.8451|-147.96|64.8451|-147.96|
-1701|130|F|72835.95|1992-05-19|2-HIGH|Clerk#000000395|0|furiously. regular, close theodoli|64.8891|-147.851|64.8891|-147.851|
-1702|67|P|194119.31|1995-05-07|2-HIGH|Clerk#000000300|0|around the carefully final deposits cajole carefully according to the b|64.8151|-147.707|64.8151|-147.707|
-1703|134|F|121220.59|1993-01-28|3-MEDIUM|Clerk#000000463|0| pinto beans poach. bold courts boost. regular, express deposits at|64.8363|-147.803|64.8363|-147.803|
-1728|64|O|131604.34|1996-05-22|2-HIGH|Clerk#000000711|0|beans. slyly regular instructions sleep! slyly final packages|64.8298|-147.611|64.8298|-147.611|
-1729|133|F|12137.76|1992-05-19|2-HIGH|Clerk#000000158|0|pending foxes wake. accounts|64.8989|-147.701|64.8989|-147.701|
-1730|124|O|150886.49|1998-07-24|5-LOW|Clerk#000000794|0| fluffily pending deposits serve. furiously even requests wake furiou|64.8371|-147.716|64.8371|-147.716|
-1731|128|O|190490.78|1996-01-06|1-URGENT|Clerk#000000268|0|lithely regular, final instructions. ironic, express packages are above|64.8147|-147.706|64.8147|-147.706|
-1732|146|F|179854.51|1993-11-29|5-LOW|Clerk#000000903|0|inal requests integrate dolph|64.8451|-147.812|64.8451|-147.812|
-1733|148|O|165489.52|1996-05-12|2-HIGH|Clerk#000000789|0|e carefully according to the accounts. furiously pending instructions sleep|64.8386|-147.788|64.8386|-147.788|
-1734|7|F|44002.53|1994-06-11|2-HIGH|Clerk#000000722|0| final ideas haggle. blithely quick foxes sleep busily bold ideas. i|64.8372|-147.768|64.8372|-147.768|
-1735|22|F|98541.95|1992-12-27|1-URGENT|Clerk#000000458|0|ully idle requests wake qu|64.8151|-147.707|64.8151|-147.707|
-1760|115|O|82151.12|1996-05-17|5-LOW|Clerk#000000917|0| deposits. busily regular deposits wake blithely along the furiously even re|64.843|-147.722|64.843|-147.722|
-1761|106|F|211925.95|1993-12-24|2-HIGH|Clerk#000000817|0|efully slyly bold frets. packages boost b|64.8426|-147.725|64.8426|-147.725|
-1762|77|F|202227.17|1994-08-20|4-NOT SPECIFIED|Clerk#000000653|0|ly ironic packages. furi|64.8615|-147.723|64.8615|-147.723|
-1763|121|O|140685.01|1996-10-29|2-HIGH|Clerk#000000321|0|es. bold dependencies haggle furiously along |64.8694|-147.067|64.8694|-147.067|
-1764|29|F|47384.71|1992-03-25|1-URGENT|Clerk#000000182|0|. slyly final packages integrate carefully acro|64.8404|-147.724|64.8404|-147.724|
-1765|73|O|36551.43|1995-12-03|4-NOT SPECIFIED|Clerk#000000490|0| regular excuses wake slyly|64.9686|-147.577|64.9686|-147.577|
-1766|139|O|41032.81|1996-10-12|2-HIGH|Clerk#000000983|0|unusual deposits affix quickly beyond the carefully s|64.8497|-147.732|64.8497|-147.732|
-1767|25|P|136582.60|1995-03-14|2-HIGH|Clerk#000000327|0|eposits use carefully carefully regular platelets. quickly regular packages al|64.8861|-147.587|64.8861|-147.587|
-1792|49|F|107919.86|1993-11-09|5-LOW|Clerk#000000102|0|ructions haggle along the pending packages. carefully speci|64.8508|-147.703|64.8508|-147.703|
-1793|19|F|82504.56|1992-07-12|4-NOT SPECIFIED|Clerk#000000291|0|regular packages cajole. blithely special packages according to the final d|64.841|-147.72|64.841|-147.72|
-1794|140|O|179462.21|1997-09-28|1-URGENT|Clerk#000000686|0|ally silent pinto beans. regular package|64.8375|-147.721|64.8375|-147.721|
-1795|94|F|146849.33|1994-03-19|2-HIGH|Clerk#000000815|0| quickly final packages! blithely dogged accounts c|64.849|-147.813|64.849|-147.813|
-1796|47|F|33755.47|1992-11-21|2-HIGH|Clerk#000000245|0|eans use furiously around th|55.3801|-131.682|55.3801|-131.682|
-1797|125|O|51494.47|1996-05-07|3-MEDIUM|Clerk#000000508|0|quiet platelets haggle since the quickly ironic instructi|55.3801|-131.682|55.3801|-131.682|
-1798|52|O|46393.97|1997-07-28|1-URGENT|Clerk#000000741|0|al foxes are blithe|55.3603|-131.702|55.3603|-131.702|
-1799|61|F|46815.93|1994-03-07|4-NOT SPECIFIED|Clerk#000000339|0|ns sleep furiously final waters. blithely regular instructions h|55.7511|-132.865|55.7511|-132.865|
-1824|49|F|81351.53|1994-05-05|1-URGENT|Clerk#000000972|0|e blithely fluffily|55.7511|-132.865|55.7511|-132.865|
-1825|148|F|150582.77|1993-12-05|3-MEDIUM|Clerk#000000345|0|ironic, final accou|60.3311|-151.284|60.3311|-151.284|
-1826|82|F|124719.97|1992-04-16|4-NOT SPECIFIED|Clerk#000000718|0|the even asymptotes dazzle fluffily slyly regular asymptotes. final, unu|60.3311|-151.284|60.3311|-151.284|
-1827|106|O|210113.88|1996-06-22|4-NOT SPECIFIED|Clerk#000000369|0|luffily even requests haggle sly|60.3311|-151.284|60.3311|-151.284|
-1828|32|F|137369.50|1994-04-18|3-MEDIUM|Clerk#000000840|0|y quickly bold packag|60.4341|-151.283|60.4341|-151.283|
-1829|112|F|127532.20|1994-05-08|2-HIGH|Clerk#000000537|0| accounts wake above the furiously unusual requests. pending package|60.3311|-151.284|60.3311|-151.284|
-1830|133|F|85122.24|1995-02-23|1-URGENT|Clerk#000000045|0|according to the even,|60.3311|-151.284|60.3311|-151.284|
-1831|71|F|58032.77|1993-12-02|1-URGENT|Clerk#000000854|0| accounts. carefully even accounts boost furiously. regular ideas engage. |60.3311|-151.284|60.3311|-151.284|
-1856|106|F|189361.42|1992-03-20|4-NOT SPECIFIED|Clerk#000000952|0|. special pinto beans run acr|60.3311|-151.284|60.3311|-151.284|
-1857|133|F|102793.59|1993-01-13|2-HIGH|Clerk#000000083|0|hely final ideas slee|60.3311|-151.284|60.3311|-151.284|
-1858|143|O|30457.91|1997-12-13|1-URGENT|Clerk#000000389|0|thely. slyly final deposits sleep|60.4311|-151.286|60.4311|-151.286|
-1859|61|O|105094.09|1997-04-11|4-NOT SPECIFIED|Clerk#000000949|0| the foxes. bravely special excuses nag carefully special r|60.3311|-151.284|60.3311|-151.284|
-1860|10|O|9103.40|1996-04-04|3-MEDIUM|Clerk#000000556|0|osits. quickly bold deposits according to |60.3311|-151.284|60.3311|-151.284|
-1861|70|F|95063.41|1994-01-03|3-MEDIUM|Clerk#000000847|0|r the fluffily close sauternes. furio|60.3311|-151.284|60.3311|-151.284|
-1862|34|O|97981.06|1998-02-24|5-LOW|Clerk#000000348|0|ts snooze ironically abou|60.3311|-151.284|60.3311|-151.284|
-1863|74|F|96359.65|1993-09-23|4-NOT SPECIFIED|Clerk#000000658|0|old sentiments. careful, |60.3191|-151.296|60.3191|-151.296|
-1888|121|F|224724.11|1993-10-31|4-NOT SPECIFIED|Clerk#000000659|0|olites. pinto beans cajole. regular deposits affix. slyly regular|60.3311|-151.284|60.3311|-151.284|
-1889|25|O|96431.77|1997-03-16|1-URGENT|Clerk#000000854|0|p around the regular notornis. unusual deposits|60.3311|-151.284|60.3311|-151.284|
-1890|10|O|202364.58|1996-12-18|4-NOT SPECIFIED|Clerk#000000627|0|romise final, regular deposits. regular fox|60.3311|-151.284|60.3311|-151.284|
-1891|61|F|76848.96|1994-12-15|5-LOW|Clerk#000000495|0|unusual foxes sleep regular deposits. requests wake special pac|60.5563|-151.241|60.5563|-151.241|
-1892|25|F|133273.64|1994-03-26|5-LOW|Clerk#000000733|0|sts. slyly regular dependencies use slyly. ironic, spec|60.6331|-151.163|60.6331|-151.163|
-1893|125|O|116792.13|1997-10-30|2-HIGH|Clerk#000000111|0|olites. silent, special deposits eat slyly quickly express packages; hockey p|60.6331|-151.163|60.6331|-151.163|
-1894|76|F|44387.23|1992-03-30|1-URGENT|Clerk#000000626|0|e furiously. furiously even accounts are slyly final accounts. closely speci|60.6331|-151.163|60.6331|-151.163|
-1895|7|F|44429.81|1994-05-30|3-MEDIUM|Clerk#000000878|0|ress accounts. bold accounts cajole. slyly final pinto beans poach regul|60.6331|-151.163|60.6331|-151.163|
-1920|110|O|119605.91|1998-06-24|5-LOW|Clerk#000000018|0|hely; furiously regular excuses|60.5551|-151.245|60.5551|-151.245|
-1921|88|F|57584.12|1994-01-18|3-MEDIUM|Clerk#000000293|0|counts. slyly quiet requests along the ruthlessly regular accounts are |60.6331|-151.163|60.6331|-151.163|
-1922|56|O|11575.77|1996-07-13|3-MEDIUM|Clerk#000000984|0|side of the blithely final re|60.5506|-151.141|60.5506|-151.141|
-1923|136|O|171128.10|1997-07-07|1-URGENT|Clerk#000000471|0| express dolphins. |60.5681|-151.281|60.5681|-151.281|
-1924|76|O|169756.19|1996-09-07|4-NOT SPECIFIED|Clerk#000000823|0| of the ironic accounts. instructions near the final instr|60.5465|-151.147|60.5465|-151.147|
-1925|17|F|146382.71|1992-03-05|1-URGENT|Clerk#000000986|0|e slyly regular deposits. furiously |60.6331|-151.163|60.6331|-151.163|
-1926|94|O|100035.03|1996-01-31|2-HIGH|Clerk#000000568|0|cajole. even warhorses sleep carefully. |60.5578|-151.116|60.5578|-151.116|
-1927|140|O|23327.88|1995-09-30|3-MEDIUM|Clerk#000000616|0|riously special packages. permanent pearls wake furiously. even packages alo|61.6182|-149.385|61.6182|-149.385|
-1952|67|F|12896.25|1994-03-16|2-HIGH|Clerk#000000254|0| silent accounts boost |61.6141|-149.457|61.6141|-149.457|
-1953|149|F|57213.18|1993-11-30|3-MEDIUM|Clerk#000000891|0| fluffily along the quickly even packages. |61.5765|-149.407|61.5765|-149.407|
-1954|56|O|158853.63|1997-05-31|4-NOT SPECIFIED|Clerk#000000104|0| unusual excuses cajole according to the blithely regular theodolites.|61.6091|-149.77|61.6091|-149.77|
-1955|13|F|103085.13|1992-04-20|1-URGENT|Clerk#000000792|0|ly special ideas. sometimes final |61.5821|-149.438|61.5821|-149.438|
-1956|127|F|88704.26|1992-09-20|4-NOT SPECIFIED|Clerk#000000600|0|ironic ideas are silent ideas. furiously final deposits sleep slyly carefu|61.6183|-149.373|61.6183|-149.373|
-1957|31|O|77482.87|1998-07-21|2-HIGH|Clerk#000000639|0|nding excuses about the |61.6131|-149.403|61.6131|-149.403|
-1958|53|O|176294.34|1995-09-22|5-LOW|Clerk#000000343|0| haggle blithely. flu|61.6352|-149.265|61.6352|-149.265|
-1959|43|O|62277.18|1997-01-13|4-NOT SPECIFIED|Clerk#000000631|0| cajole about the blithely express requests. even excuses mold bl|61.5751|-149.645|61.5751|-149.645|
-1984|52|O|79230.47|1998-04-01|1-URGENT|Clerk#000000416|0| slyly special instructions. unusual foxes use packages. carefully regular req|61.6168|-149.374|61.6168|-149.374|
-1985|7|F|171522.54|1994-09-02|4-NOT SPECIFIED|Clerk#000000741|0|slyly slyly even pains. slyly reg|61.5939|-149.43|61.5939|-149.43|
-1986|149|F|34269.96|1994-05-05|2-HIGH|Clerk#000000609|0|across the theodolites. quick|61.5792|-149.495|61.5792|-149.495|
-1987|100|F|6406.29|1994-04-30|2-HIGH|Clerk#000000652|0|gular platelets alongside |61.6141|-149.457|61.6141|-149.457|
-1988|109|O|117132.72|1995-10-06|4-NOT SPECIFIED|Clerk#000000011|0|ly ironic dolphins serve quickly busy accounts. bu|61.5829|-149.448|61.5829|-149.448|
-1989|118|F|39263.28|1994-03-16|4-NOT SPECIFIED|Clerk#000000747|0|ely bold pinto beans ha|61.5938|-149.387|61.5938|-149.387|
-1990|119|F|48781.39|1994-12-16|2-HIGH|Clerk#000000114|0|e bold patterns. always regul|61.5849|-149.38|61.5849|-149.38|
-1991|19|F|139854.41|1992-09-07|4-NOT SPECIFIED|Clerk#000000854|0|ing accounts can haggle at the carefully final Tiresias-- pending, regular|61.5729|-149.389|61.5729|-149.389|
-2016|8|O|24347.36|1996-08-16|3-MEDIUM|Clerk#000000641|0|the carefully ironic foxes. requests nag bold, r|61.5823|-149.462|61.5823|-149.462|
-2017|101|O|70529.27|1998-05-13|3-MEDIUM|Clerk#000000427|0|nusual requests. blit|61.57|-149.331|61.57|-149.331|
-2018|19|P|25007.95|1995-04-05|4-NOT SPECIFIED|Clerk#000000920|0|gular accounts wake fur|61.5821|-149.438|61.5821|-149.438|
-2019|136|F|43789.14|1992-10-23|1-URGENT|Clerk#000000565|0| furiously bold packages. fluffily fi|61.6141|-149.457|61.6141|-149.457|
-2020|73|F|136162.13|1993-06-21|3-MEDIUM|Clerk#000000192|0|es. furiously regular packages above the furiously special theodolites are a|61.6115|-149.331|61.6115|-149.331|
-2021|70|O|27016.74|1995-07-15|1-URGENT|Clerk#000000155|0|ong the furiously regular requests. unusual deposits wake fluffily inside|61.6091|-149.77|61.6091|-149.77|
-2022|62|F|206742.11|1992-03-15|1-URGENT|Clerk#000000268|0| dependencies sleep fluffily even, ironic deposits. express, silen|61.6141|-149.457|61.6141|-149.457|
-2023|118|F|144123.37|1992-05-06|5-LOW|Clerk#000000137|0|ular courts engage according to the|61.5826|-149.427|61.5826|-149.427|
-2048|17|F|33401.77|1993-11-15|1-URGENT|Clerk#000000934|0|s cajole after the blithely final accounts. f|61.5976|-149.366|61.5976|-149.366|
-2049|31|O|153048.74|1995-12-07|2-HIGH|Clerk#000000859|0|ly regular requests thrash blithely about the fluffily even theodolites. r|61.5976|-149.366|61.5976|-149.366|
-2050|28|F|208517.98|1994-06-02|4-NOT SPECIFIED|Clerk#000000821|0|d accounts against the furiously regular packages use bli|61.5531|-149.651|61.5531|-149.651|
-2051|40|O|87988.34|1996-03-18|4-NOT SPECIFIED|Clerk#000000333|0|ctions sleep blithely. blithely regu|61.5531|-149.651|61.5531|-149.651|
-2052|91|F|141822.19|1992-04-13|2-HIGH|Clerk#000000767|0| requests sleep around the even, even courts. ironic theodolites affix furious|61.5883|-149.456|61.5883|-149.456|
-2053|142|F|125125.57|1995-02-07|1-URGENT|Clerk#000000717|0|ar requests: blithely sly accounts boost carefully across t|61.6249|-149.435|61.6249|-149.435|
-2054|41|F|144335.16|1992-06-08|4-NOT SPECIFIED|Clerk#000000103|0|l requests affix carefully about the furiously special|61.6141|-149.457|61.6141|-149.457|
-2055|97|F|57092.26|1993-09-04|1-URGENT|Clerk#000000067|0|. warhorses affix slyly blithely express instructions? fur|61.5709|-149.452|61.5709|-149.452|
-2080|95|F|45767.69|1993-06-18|5-LOW|Clerk#000000190|0|ironic, pending theodolites are carefully about the quickly regular theodolite|61.6651|-149.465|61.6651|-149.465|
-2081|121|O|145654.97|1997-07-05|2-HIGH|Clerk#000000136|0|ong the regular theo|61.5841|-149.441|61.5841|-149.441|
-2082|49|F|46753.63|1995-01-10|2-HIGH|Clerk#000000354|0|cial accounts. ironic, express dolphins nod slyly sometimes final reques|61.1571|-149.883|61.1571|-149.883|
-2083|101|F|31795.52|1993-07-14|3-MEDIUM|Clerk#000000361|0|al patterns. bold, final foxes nag bravely about the furiously express|61.2198|-149.733|61.2198|-149.733|
-2084|80|F|190652.53|1993-03-17|2-HIGH|Clerk#000000048|0|zle furiously final, careful packages. slyly ironic ideas amo|61.1863|-149.976|61.1863|-149.976|
-2085|49|F|45311.07|1993-11-21|3-MEDIUM|Clerk#000000818|0|ress, express ideas haggle|61.2161|-149.876|61.2161|-149.876|
-2086|142|F|188985.18|1994-10-19|1-URGENT|Clerk#000000046|0| permanently regular|61.2031|-149.749|61.2031|-149.749|
-2087|50|O|53581.41|1998-01-31|2-HIGH|Clerk#000000626|0|e always regular packages nod against the furiously spec|61.1644|-149.897|61.1644|-149.897|
-2112|64|O|17986.15|1997-02-05|2-HIGH|Clerk#000000351|0|against the slyly even id|61.1834|-149.866|61.1834|-149.866|
-2113|32|O|65678.21|1997-11-08|2-HIGH|Clerk#000000527|0|slyly regular instruct|61.1731|-149.889|61.1731|-149.889|
-2114|79|F|106446.02|1995-01-16|5-LOW|Clerk#000000751|0|r, unusual accounts haggle across the busy platelets. carefully |61.1089|-149.854|61.1089|-149.854|
-2115|106|O|134814.65|1998-05-23|4-NOT SPECIFIED|Clerk#000000101|0|odolites boost. carefully regular excuses cajole. quickly ironic pinto be|61.1951|-149.916|61.1951|-149.916|
-2116|23|F|60887.90|1994-08-26|1-URGENT|Clerk#000000197|0|efully after the asymptotes. furiously sp|61.2157|-149.821|61.2157|-149.821|
-2117|22|O|145713.03|1997-04-26|2-HIGH|Clerk#000000887|0|ely even dependencies. regular foxes use blithely.|61.1372|-149.954|61.1372|-149.954|
-2118|134|O|38974.67|1996-10-09|1-URGENT|Clerk#000000196|0|ial requests wake carefully special packages. f|61.1955|-149.737|61.1955|-149.737|
-2119|64|O|34632.57|1996-08-20|2-HIGH|Clerk#000000434|0|uickly pending escapades. fluffily ir|61.1444|-149.867|61.1444|-149.867|
-2144|136|F|119917.28|1994-03-29|3-MEDIUM|Clerk#000000546|0|t. carefully quick requests across the deposits wake regu|61.2178|-149.882|61.2178|-149.882|
-2145|134|F|18885.35|1992-10-03|1-URGENT|Clerk#000000886|0|sts would snooze blithely alongside of th|61.1824|-149.849|61.1824|-149.849|
-2146|118|F|179686.07|1992-09-14|4-NOT SPECIFIED|Clerk#000000476|0|ven packages. dependencies wake slyl|61.2161|-149.876|61.2161|-149.876|
-2147|100|F|91513.79|1992-09-06|4-NOT SPECIFIED|Clerk#000000424|0| haggle carefully furiously final foxes. pending escapades thrash. bold theod|61.2022|-149.84|61.2022|-149.84|
-2148|130|F|19612.03|1995-04-19|4-NOT SPECIFIED|Clerk#000000517|0|ross the furiously unusual theodolites. always expre|61.2099|-149.762|61.2099|-149.762|
-2149|101|F|105145.40|1993-03-13|5-LOW|Clerk#000000555|0|nusual accounts nag furiously special reques|61.1951|-149.84|61.1951|-149.84|
-2150|82|F|166961.06|1994-06-03|3-MEDIUM|Clerk#000000154|0|ect slyly against the even, final packages. quickly regular pinto beans wake c|61.1069|-149.859|61.1069|-149.859|
-2151|58|O|124608.69|1996-11-11|3-MEDIUM|Clerk#000000996|0|c requests. ironic platelets cajole across the quickly fluffy deposits.|61.1635|-149.881|61.1635|-149.881|
-2176|104|F|87248.17|1992-11-10|1-URGENT|Clerk#000000195|0|s haggle regularly accor|61.1201|-149.89|61.1201|-149.89|
-2177|136|O|183493.42|1997-01-20|3-MEDIUM|Clerk#000000161|0|ove the blithely unusual packages cajole carefully fluffily special request|61.1902|-149.908|61.1902|-149.908|
-2178|8|O|79594.68|1996-12-12|3-MEDIUM|Clerk#000000656|0|thely according to the instructions. furious|61.2104|-149.857|61.2104|-149.857|
-2179|41|O|77487.09|1996-09-07|2-HIGH|Clerk#000000935|0|ounts alongside of the furiously unusual braids cajol|61.1771|-149.97|61.1771|-149.97|
-2180|76|O|208481.57|1996-09-14|4-NOT SPECIFIED|Clerk#000000650|0|xpress, unusual pains. furiously ironic excu|61.1859|-149.976|61.1859|-149.976|
-2181|76|O|100954.64|1995-09-13|3-MEDIUM|Clerk#000000814|0|y against the ironic, even|61.2171|-149.9|61.2171|-149.9|
-2182|23|F|116003.11|1994-04-05|2-HIGH|Clerk#000000071|0|ccounts. quickly bold deposits across the excuses sl|61.1162|-149.755|61.1162|-149.755|
-2183|113|O|49841.12|1996-06-22|1-URGENT|Clerk#000000287|0| among the express, ironic packages. slyly ironic platelets integrat|61.1381|-149.844|61.1381|-149.844|
-2208|68|P|245388.06|1995-05-01|4-NOT SPECIFIED|Clerk#000000900|0|symptotes wake slyly blithely unusual packages.|61.1775|-149.941|61.1775|-149.941|
-2209|91|F|129086.93|1992-07-10|2-HIGH|Clerk#000000056|0|er above the slyly silent requests. furiously reg|61.1938|-149.878|61.1938|-149.878|
-2210|32|F|31689.46|1992-01-16|2-HIGH|Clerk#000000941|0| believe carefully quickly express pinto beans. deposi|61.1571|-149.883|61.1571|-149.883|
-2211|92|F|140031.23|1994-06-30|2-HIGH|Clerk#000000464|0|ffily bold courts e|61.1541|-149.958|61.1541|-149.958|
-2212|118|F|17231.05|1994-03-23|3-MEDIUM|Clerk#000000954|0|structions above the unusual requests use fur|61.135|-149.88|61.135|-149.88|
-2213|122|F|146136.10|1993-01-15|4-NOT SPECIFIED|Clerk#000000598|0|osits are carefully reg|61.1101|-149.857|61.1101|-149.857|
-2214|115|O|150345.63|1998-05-05|3-MEDIUM|Clerk#000000253|0|packages. fluffily even accounts haggle blithely. carefully ironic depen|61.1101|-149.857|61.1101|-149.857|
-2215|40|O|108239.46|1996-06-16|4-NOT SPECIFIED|Clerk#000000817|0|le final, final foxes. quickly regular gifts are carefully deposit|61.1101|-149.857|61.1101|-149.857|
-2240|56|F|174090.30|1992-03-06|4-NOT SPECIFIED|Clerk#000000622|0|accounts against the slyly express foxes are after the slyly regular |61.1101|-149.857|61.1101|-149.857|
-2241|103|F|165219.08|1993-05-11|1-URGENT|Clerk#000000081|0|y about the silent excuses. furiously ironic instructions along the sil|61.1101|-149.857|61.1101|-149.857|
-2242|82|O|15082.82|1997-07-20|4-NOT SPECIFIED|Clerk#000000360|0| pending multipliers. carefully express asymptotes use quickl|61.1101|-149.857|61.1101|-149.857|
-2243|49|O|10451.97|1995-06-10|2-HIGH|Clerk#000000813|0|ously regular deposits integrate s|61.1101|-149.857|61.1101|-149.857|
-2244|127|F|21207.08|1993-01-09|1-URGENT|Clerk#000001000|0|ckages. ironic, ironic accounts haggle blithely express excuses. |61.1101|-149.857|61.1101|-149.857|
-2245|58|F|150585.73|1993-04-28|3-MEDIUM|Clerk#000000528|0|ake carefully. braids haggle slyly quickly b|61.1101|-149.857|61.1101|-149.857|
-2246|113|O|85755.84|1996-05-27|4-NOT SPECIFIED|Clerk#000000739|0| final gifts sleep |61.1101|-149.857|61.1101|-149.857|
-2247|95|F|13491.31|1992-08-02|4-NOT SPECIFIED|Clerk#000000947|0|furiously regular packages. final brai|61.1101|-149.857|61.1101|-149.857|
-2272|139|F|127934.71|1993-04-13|2-HIGH|Clerk#000000449|0|s. bold, ironic pinto beans wake. silently specia|61.1101|-149.857|61.1101|-149.857|
-2273|136|O|142291.79|1996-12-14|5-LOW|Clerk#000000155|0|uickly express foxes haggle quickly against|61.1101|-149.857|61.1101|-149.857|
-2274|104|F|58273.89|1993-09-04|4-NOT SPECIFIED|Clerk#000000258|0|nstructions try to hag|61.1101|-149.857|61.1101|-149.857|
-2275|149|F|37398.90|1992-10-22|4-NOT SPECIFIED|Clerk#000000206|0| furiously furious platelets. slyly final packa|61.1101|-149.857|61.1101|-149.857|
-2276|43|O|141159.63|1996-04-29|4-NOT SPECIFIED|Clerk#000000821|0|ecial requests. fox|61.1101|-149.857|61.1101|-149.857|
-2277|89|F|79270.23|1995-01-02|4-NOT SPECIFIED|Clerk#000000385|0|accounts cajole. even i|61.1101|-149.857|61.1101|-149.857|
-2278|142|O|101878.46|1998-04-25|3-MEDIUM|Clerk#000000186|0|r pinto beans integrate after the carefully even deposits. blit|61.1101|-149.857|61.1101|-149.857|
-2279|80|F|142322.33|1993-02-23|3-MEDIUM|Clerk#000000898|0|de of the quickly unusual instructio|61.2141|-149.864|61.2141|-149.864|
-2304|46|F|93769.28|1994-01-07|4-NOT SPECIFIED|Clerk#000000415|0|onic platelets. ironic packages haggle. packages nag doggedly according to|61.2171|-149.9|61.2171|-149.9|
-2305|43|F|122964.66|1993-01-26|2-HIGH|Clerk#000000440|0|ove the furiously even acco|61.2171|-149.9|61.2171|-149.9|
-2306|28|O|244704.23|1995-07-26|2-HIGH|Clerk#000000975|0| wake furiously requests. permanent requests affix. final packages caj|61.2171|-149.9|61.2171|-149.9|
-2307|106|F|59417.76|1993-06-29|5-LOW|Clerk#000000952|0|furiously even asymptotes? carefully regular accounts|61.2171|-149.9|61.2171|-149.9|
-2308|25|F|58546.02|1992-10-25|4-NOT SPECIFIED|Clerk#000000609|0|ts. slyly final depo|61.2171|-149.9|61.2171|-149.9|
-2309|100|O|146933.07|1995-09-04|5-LOW|Clerk#000000803|0|he carefully pending packages. fluffily stealthy foxes engage carefully|61.2171|-149.9|61.2171|-149.9|
-2310|31|O|82928.12|1996-09-20|5-LOW|Clerk#000000917|0|wake carefully. unusual instructions nag ironic, regular excuse|61.2171|-149.9|61.2171|-149.9|
-2311|73|P|153233.93|1995-05-02|2-HIGH|Clerk#000000761|0|ly pending asymptotes-- furiously bold excus|61.2171|-149.9|61.2171|-149.9|
-2336|142|O|22294.51|1996-01-07|4-NOT SPECIFIED|Clerk#000000902|0|c, final excuses sleep furiously among the even theodolites. f|61.2171|-149.9|61.2171|-149.9|
-2337|142|O|45704.96|1997-06-18|4-NOT SPECIFIED|Clerk#000000754|0| quickly. final accounts haggle. carefully final acco|61.2171|-149.9|61.2171|-149.9|
-2338|140|O|28155.92|1997-09-15|2-HIGH|Clerk#000000951|0|riously final dugouts. final, ironic packages wake express, ironic id|61.2171|-149.9|61.2171|-149.9|
-2339|109|F|63470.78|1993-12-15|5-LOW|Clerk#000000847|0| against the regular |61.2171|-149.9|61.2171|-149.9|
-2340|65|O|30778.78|1996-01-12|1-URGENT|Clerk#000000964|0|ter the deposits sleep according to the slyly regular packages. carefully |61.2171|-149.9|61.2171|-149.9|
-2341|82|F|55950.21|1993-05-30|5-LOW|Clerk#000000443|0|sts-- blithely bold dolphins through the deposits nag blithely carefully re|61.2171|-149.9|61.2171|-149.9|
-2342|37|O|104038.78|1996-06-09|1-URGENT|Clerk#000000615|0|oost carefully across the regular accounts. blithely final d|61.2171|-149.9|61.2171|-149.9|
-2343|73|O|85381.00|1995-08-21|3-MEDIUM|Clerk#000000170|0|fluffily over the slyly special deposits. quickl|64.8487|-147.704|64.8487|-147.704|
-2368|13|F|101240.96|1993-08-20|1-URGENT|Clerk#000000830|0|t the bold instructions. carefully unusual |64.8486|-147.705|64.8486|-147.705|
-2369|110|O|73517.91|1996-12-24|2-HIGH|Clerk#000000752|0|iously even requests are dogged, express |64.8087|-147.71|64.8087|-147.71|
-2370|142|F|73924.21|1994-01-17|1-URGENT|Clerk#000000231|0|lyly final packages. quickly final deposits haggl|64.8363|-147.758|64.8363|-147.758|
-2371|19|O|193857.67|1998-01-07|1-URGENT|Clerk#000000028|0|ckages haggle at th|64.8476|-147.704|64.8476|-147.704|
-2372|31|O|104927.66|1997-11-21|5-LOW|Clerk#000000342|0|s: deposits haggle along the final ideas. careful|64.8302|-147.744|64.8302|-147.744|
-2373|28|F|55211.04|1994-03-12|4-NOT SPECIFIED|Clerk#000000306|0| even, special courts grow quickly. pending,|64.8476|-147.812|64.8476|-147.812|
-2374|4|F|115219.88|1993-10-29|4-NOT SPECIFIED|Clerk#000000081|0| blithely regular packages. blithely unusua|64.8144|-147.756|64.8144|-147.756|
-2375|5|O|106612.48|1996-11-20|3-MEDIUM|Clerk#000000197|0|unusual, pending theodolites cajole carefully |64.8183|-147.778|64.8183|-147.778|
-2400|37|O|92798.66|1998-07-25|5-LOW|Clerk#000000782|0|nusual courts nag against the carefully unusual pinto b|64.8494|-147.818|64.8494|-147.818|
-2401|148|O|88448.24|1997-07-29|4-NOT SPECIFIED|Clerk#000000531|0|ully unusual instructions boost carefully silently regular requests. |64.849|-147.822|64.849|-147.822|
-2402|67|O|70403.62|1996-09-06|4-NOT SPECIFIED|Clerk#000000162|0|slyly final sheaves sleep slyly. q|64.8367|-147.716|64.8367|-147.716|
-2403|55|O|111020.79|1998-04-11|3-MEDIUM|Clerk#000000820|0|furiously regular deposits use. furiously unusual accounts wake along the |64.8127|-147.772|64.8127|-147.772|
-2404|77|O|109077.69|1997-03-13|4-NOT SPECIFIED|Clerk#000000409|0|deposits breach furiously. ironic foxes haggle carefully bold packag|64.8143|-147.751|64.8143|-147.751|
-2405|73|O|115929.14|1996-12-23|3-MEDIUM|Clerk#000000535|0|ular, regular asympto|64.842|-147.721|64.842|-147.721|
-2406|7|O|182516.77|1996-10-28|5-LOW|Clerk#000000561|0|blithely regular accounts u|64.8403|-147.714|64.8403|-147.714|
-2407|55|O|112843.52|1998-06-19|2-HIGH|Clerk#000000068|0|uests affix slyly among the slyly regular depos|64.8371|-147.881|64.8371|-147.881|
-2432|103|O|62661.93|1996-07-13|1-URGENT|Clerk#000000115|0|re. slyly even deposits wake bra|64.8151|-147.707|64.8151|-147.707|
-2433|31|F|147071.86|1994-08-22|4-NOT SPECIFIED|Clerk#000000324|0|ess patterns are slyly. packages haggle carefu|64.8151|-147.707|64.8151|-147.707|
-2434|25|O|123956.25|1997-04-27|3-MEDIUM|Clerk#000000190|0|s. quickly ironic dolphins impress final deposits. blithel|64.8541|-147.81|64.8541|-147.81|
-2435|73|F|122490.66|1993-02-21|5-LOW|Clerk#000000112|0|es are carefully along the carefully final instructions. pe|64.8878|-147.496|64.8878|-147.496|
-2436|125|O|73990.08|1995-09-11|4-NOT SPECIFIED|Clerk#000000549|0|arefully. blithely bold deposits affix special accounts. final foxes nag. spe|64.8299|-147.728|64.8299|-147.728|
-2437|85|F|143411.69|1993-04-21|4-NOT SPECIFIED|Clerk#000000578|0|. theodolites wake slyly-- ironic, pending platelets above the carefully exp|64.8132|-147.762|64.8132|-147.762|
-2438|13|F|214494.39|1993-07-15|2-HIGH|Clerk#000000744|0|the final, regular warhorses. regularly |64.8372|-147.713|64.8372|-147.713|
-2439|55|O|41811.12|1997-03-15|2-HIGH|Clerk#000000819|0|lithely after the car|64.7927|-148.036|64.7927|-148.036|
-2464|145|O|30495.65|1997-11-23|5-LOW|Clerk#000000633|0|le about the instructions. courts wake carefully even|64.8717|-147.819|64.8717|-147.819|
-2465|34|O|180737.75|1995-06-24|1-URGENT|Clerk#000000078|0|al pinto beans. final, bold packages wake quickly|64.8527|-147.686|64.8527|-147.686|
-2466|19|F|161625.50|1994-03-06|1-URGENT|Clerk#000000424|0|c pinto beans. express deposits wake quickly. even, final courts nag. package|64.8371|-147.811|64.8371|-147.811|
-2467|35|O|7231.91|1995-07-16|4-NOT SPECIFIED|Clerk#000000914|0|pades sleep furiously. sometimes regular packages again|64.846|-147.705|64.846|-147.705|
-2468|112|O|160627.01|1997-06-09|4-NOT SPECIFIED|Clerk#000000260|0|ickly regular packages. slyly ruthless requests snooze quickly blithe|64.9064|-147.726|64.9064|-147.726|
-2469|124|O|192074.23|1996-11-26|5-LOW|Clerk#000000730|0| sleep closely regular instructions. furiously ironic instructi|64.9347|-147.56|64.9347|-147.56|
-2470|58|O|104966.33|1997-04-19|3-MEDIUM|Clerk#000000452|0|to the furiously final packages? pa|64.8861|-147.677|64.8861|-147.677|
-2471|89|O|34936.31|1998-03-12|4-NOT SPECIFIED|Clerk#000000860|0|carefully blithely regular pac|64.8302|-147.744|64.8302|-147.744|
-2496|136|F|140390.60|1994-01-09|2-HIGH|Clerk#000000142|0|slyly. pending instructions sleep. quic|60.6673|-151.311|60.6673|-151.311|
-2497|47|F|171326.48|1992-08-27|1-URGENT|Clerk#000000977|0|ily ironic pinto beans. furiously final platelets alongside of t|60.6997|-151.38|60.6997|-151.38|
-2498|97|F|45514.27|1993-11-08|5-LOW|Clerk#000000373|0|g the slyly special pinto beans. |60.5658|-151.244|60.5658|-151.244|
-2499|121|O|147243.86|1995-09-24|1-URGENT|Clerk#000000277|0|r the quickly bold foxes. bold instructi|60.6331|-151.163|60.6331|-151.163|
-2500|133|F|131122.82|1992-08-15|2-HIGH|Clerk#000000447|0|integrate slyly pending deposits. furiously ironic accounts across the s|60.6331|-151.163|60.6331|-151.163|
-2501|67|O|79380.51|1997-05-25|5-LOW|Clerk#000000144|0|ickly special theodolite|60.6331|-151.163|60.6331|-151.163|
-2502|70|F|33470.40|1993-05-28|4-NOT SPECIFIED|Clerk#000000914|0|lyly: carefully pending ideas affix again|60.6201|-151.332|60.6201|-151.332|
-2503|7|F|183671.08|1993-06-20|3-MEDIUM|Clerk#000000294|0|ly even packages was. ironic, regular deposits unwind furiously across the p|60.5004|-151.276|60.5004|-151.276|
-2528|55|F|92069.62|1994-11-20|1-URGENT|Clerk#000000789|0|ular dependencies? regular frays kindle according to the blith|60.6331|-151.163|60.6331|-151.163|
-2529|136|O|4104.30|1996-08-20|2-HIGH|Clerk#000000511|0|posits across the silent instructions wake blithely across |60.6331|-151.163|60.6331|-151.163|
-2530|128|F|58853.11|1994-03-21|3-MEDIUM|Clerk#000000291|0|ular instructions about the quic|60.6901|-151.321|60.6901|-151.321|
-2531|44|O|143212.85|1996-05-06|4-NOT SPECIFIED|Clerk#000000095|0|even accounts. furiously ironic excuses sleep fluffily. carefully silen|60.6676|-151.29|60.6676|-151.29|
-2532|94|O|116093.49|1995-10-11|2-HIGH|Clerk#000000498|0|the blithely pending accounts. regular, regular excuses boost aro|60.6331|-151.163|60.6331|-151.163|
-2533|50|O|168495.03|1997-03-24|1-URGENT|Clerk#000000594|0|ecial instructions. spec|60.5632|-151.266|60.5632|-151.266|
-2534|76|O|202784.54|1996-07-17|3-MEDIUM|Clerk#000000332|0|packages cajole ironic requests. furiously regular|60.6331|-151.163|60.6331|-151.163|
-2535|121|F|67018.30|1993-05-25|5-LOW|Clerk#000000296|0|phins cajole beneath the fluffily express asymptotes. c|60.6331|-151.163|60.6331|-151.163|
-2560|131|F|153426.79|1992-09-05|1-URGENT|Clerk#000000538|0|atelets; quickly sly requests|60.6509|-151.342|60.6509|-151.342|
-2561|58|O|137473.58|1997-11-14|1-URGENT|Clerk#000000861|0|ual requests. unusual deposits cajole furiously pending, regular platelets. |60.5601|-151.107|60.5601|-151.107|
-2562|10|F|136360.37|1992-08-01|1-URGENT|Clerk#000000467|0|elets. pending dolphins promise slyly. bo|60.5123|-151.275|60.5123|-151.275|
-2563|62|F|168952.10|1993-11-19|4-NOT SPECIFIED|Clerk#000000150|0|sly even packages after the furio|60.6076|-151.325|60.6076|-151.325|
-2564|77|F|3967.47|1994-09-09|2-HIGH|Clerk#000000718|0|usly regular pinto beans. orbits wake carefully. slyly e|60.6331|-151.163|60.6331|-151.163|
-2565|56|O|204438.57|1998-02-28|3-MEDIUM|Clerk#000000032|0|x-ray blithely along|60.5175|-151.235|60.5175|-151.235|
-2566|86|F|89992.48|1992-10-10|3-MEDIUM|Clerk#000000414|0|ructions boost bold ideas. idly ironic accounts use according to th|60.5535|-151.108|60.5535|-151.108|
-2567|70|O|263411.29|1998-02-27|2-HIGH|Clerk#000000031|0|detect. furiously ironic requests|60.5614|-151.275|60.5614|-151.275|
-2592|101|F|8225.96|1993-03-05|4-NOT SPECIFIED|Clerk#000000524|0|ts nag fluffily. quickly stealthy theodolite|60.5647|-151.195|60.5647|-151.195|
-2593|92|F|134726.09|1993-09-04|2-HIGH|Clerk#000000468|0|r the carefully final|60.6331|-151.163|60.6331|-151.163|
-2594|79|F|94866.39|1992-12-17|1-URGENT|Clerk#000000550|0|ests. theodolites above the blithely even accounts detect furio|60.6331|-151.163|60.6331|-151.163|
-2595|74|O|173130.20|1995-12-14|4-NOT SPECIFIED|Clerk#000000222|0|arefully ironic requests nag carefully ideas. |60.6331|-151.163|60.6331|-151.163|
-2596|43|O|74940.13|1996-08-17|1-URGENT|Clerk#000000242|0|requests. ironic, bold theodolites wak|60.6331|-151.163|60.6331|-151.163|
-2597|104|F|21964.66|1993-02-04|2-HIGH|Clerk#000000757|0|iously ruthless exc|60.6331|-151.163|60.6331|-151.163|
-2598|112|O|84871.50|1996-03-05|3-MEDIUM|Clerk#000000391|0| ironic notornis according to the blithely final requests should |60.6678|-151.31|60.6678|-151.31|
-2599|149|O|62807.13|1996-11-07|2-HIGH|Clerk#000000722|0|ts. slyly regular theodolites wake sil|60.5003|-151.276|60.5003|-151.276|
-2624|52|O|27148.63|1996-11-28|5-LOW|Clerk#000000930|0|ic, regular packages|60.6331|-151.163|60.6331|-151.163|
-2625|40|F|39382.74|1992-10-14|4-NOT SPECIFIED|Clerk#000000386|0| final deposits. blithely ironic ideas |61.5855|-149.326|61.5855|-149.326|
-2626|139|O|84314.51|1995-09-08|4-NOT SPECIFIED|Clerk#000000289|0|gside of the carefully special packages are furiously after the slyly express |61.5979|-149.437|61.5979|-149.437|
-2627|149|F|26798.65|1992-03-24|3-MEDIUM|Clerk#000000181|0|s. silent, ruthless requests|61.6141|-149.457|61.6141|-149.457|
-2628|56|F|165655.99|1993-10-22|5-LOW|Clerk#000000836|0|ajole across the blithely careful accounts. blithely silent deposits sl|61.5799|-149.461|61.5799|-149.461|
-2629|139|O|96458.03|1998-04-06|5-LOW|Clerk#000000680|0|uches dazzle carefully even, express excuses. ac|61.5845|-149.337|61.5845|-149.337|
-2630|85|F|127132.51|1992-10-24|5-LOW|Clerk#000000712|0|inal theodolites. ironic instructions s|61.5351|-149.558|61.5351|-149.558|
-2631|37|F|63103.32|1993-09-24|5-LOW|Clerk#000000833|0| quickly unusual deposits doubt around |61.5811|-149.45|61.5811|-149.45|
-2656|77|F|105492.37|1993-05-04|1-URGENT|Clerk#000000307|0|elets. slyly final accou|61.5793|-149.442|61.5793|-149.442|
-2657|25|O|148176.06|1995-10-17|2-HIGH|Clerk#000000160|0| foxes-- slyly final dependencies around the slyly final theodo|61.5661|-149.313|61.5661|-149.313|
-2658|14|O|163834.46|1995-09-23|3-MEDIUM|Clerk#000000400|0|bout the slyly regular accounts. ironic, |61.6141|-149.457|61.6141|-149.457|
-2659|83|F|79785.52|1993-12-18|4-NOT SPECIFIED|Clerk#000000758|0|cross the pending requests maintain |61.5786|-149.332|61.5786|-149.332|
-2660|127|O|16922.51|1995-08-05|5-LOW|Clerk#000000480|0|ly finally regular deposits. ironic theodolites cajole|61.5811|-149.45|61.5811|-149.45|
-2661|74|O|106036.84|1997-01-04|3-MEDIUM|Clerk#000000217|0|al, regular pinto beans. silently final deposits should have t|61.5825|-149.429|61.5825|-149.429|
-2662|37|O|87689.88|1996-08-21|3-MEDIUM|Clerk#000000589|0|bold pinto beans above the slyly final accounts affix furiously deposits. pac|61.6141|-149.457|61.6141|-149.457|
-2663|95|O|35131.80|1995-09-06|1-URGENT|Clerk#000000950|0|ar requests. furiously final dolphins along the fluffily spe|61.5531|-149.651|61.5531|-149.651|
-2688|98|F|181077.36|1992-01-24|2-HIGH|Clerk#000000720|0|have to nag according to the pending theodolites. sly|61.5531|-149.651|61.5531|-149.651|
-2689|103|F|41552.78|1992-04-09|4-NOT SPECIFIED|Clerk#000000698|0|press pains wake. furiously express theodolites alongsid|61.5698|-149.62|61.5698|-149.62|
-2690|94|O|224674.27|1996-03-31|3-MEDIUM|Clerk#000000760|0|ravely even theodolites |61.6141|-149.457|61.6141|-149.457|
-2691|7|F|30137.17|1992-04-30|5-LOW|Clerk#000000439|0|es at the regular deposits sleep slyly by the fluffy requests. eve|61.5474|-149.458|61.5474|-149.458|
-2692|62|O|24265.24|1997-12-02|3-MEDIUM|Clerk#000000878|0|es. regular asymptotes cajole above t|61.5825|-149.429|61.5825|-149.429|
-2693|19|O|66158.13|1996-09-04|1-URGENT|Clerk#000000370|0|ndle never. blithely regular packages nag carefully enticing platelets. ca|61.5955|-149.423|61.5955|-149.423|
-2694|121|O|102807.59|1996-03-14|5-LOW|Clerk#000000722|0| requests. bold deposits above the theodol|61.5801|-149.461|61.5801|-149.461|
-2695|58|O|138584.20|1996-08-20|1-URGENT|Clerk#000000697|0|ven deposits around the quickly regular packa|61.5785|-149.415|61.5785|-149.415|
-2720|31|F|161307.05|1993-06-08|1-URGENT|Clerk#000000948|0|quickly. special asymptotes are fluffily ironi|61.6402|-149.34|61.6402|-149.34|
-2721|79|O|59180.25|1996-01-27|2-HIGH|Clerk#000000401|0| ideas eat even, unusual ideas. theodolites are carefully|61.583|-149.457|61.583|-149.457|
-2722|35|F|50328.84|1994-04-09|5-LOW|Clerk#000000638|0|rding to the carefully quick deposits. bli|61.5907|-149.295|61.5907|-149.295|
-2723|61|O|104759.25|1995-10-06|5-LOW|Clerk#000000836|0|nts must have to cajo|61.6141|-149.457|61.6141|-149.457|
-2724|137|F|116069.66|1994-09-14|2-HIGH|Clerk#000000217|0| sleep blithely. blithely idle |61.5933|-149.397|61.5933|-149.397|
-2725|89|F|75144.68|1994-05-21|4-NOT SPECIFIED|Clerk#000000835|0|ular deposits. spec|61.6091|-149.77|61.6091|-149.77|
-2726|7|F|47753.00|1992-11-27|5-LOW|Clerk#000000470|0| blithely even dinos sleep care|61.577|-149.411|61.577|-149.411|
-2727|74|O|3089.42|1998-04-19|4-NOT SPECIFIED|Clerk#000000879|0|sual theodolites cajole enticingly above the furiously fin|61.6078|-149.322|61.6078|-149.322|
-2752|59|F|187932.30|1993-11-19|2-HIGH|Clerk#000000648|0| carefully regular foxes are quickly quickl|61.6131|-149.397|61.6131|-149.397|
-2753|16|F|159720.39|1993-11-30|2-HIGH|Clerk#000000380|0|ending instructions. unusual deposits|61.6648|-149.372|61.6648|-149.372|
-2754|145|F|25985.52|1994-04-03|2-HIGH|Clerk#000000960|0|cies detect slyly. |61.5531|-149.651|61.5531|-149.651|
-2755|118|F|101202.18|1992-02-07|4-NOT SPECIFIED|Clerk#000000177|0|ously according to the sly foxes. blithely regular pinto bean|61.5811|-149.45|61.5811|-149.45|
-2756|118|F|142323.38|1994-04-18|1-URGENT|Clerk#000000537|0|arefully special warho|61.583|-149.457|61.583|-149.457|
-2757|76|O|89792.48|1995-07-20|2-HIGH|Clerk#000000216|0| regular requests subl|61.1955|-149.9|61.1955|-149.9|
-2758|43|O|36671.88|1998-07-12|5-LOW|Clerk#000000863|0|s cajole according to the carefully special |61.1844|-149.897|61.1844|-149.897|
-2759|116|F|89731.10|1993-11-25|4-NOT SPECIFIED|Clerk#000000071|0|ts. regular, pending pinto beans sleep ab|61.1901|-149.892|61.1901|-149.892|
-2784|95|O|106635.21|1998-01-07|1-URGENT|Clerk#000000540|0|g deposits alongside of the silent requests s|61.1444|-149.867|61.1444|-149.867|
-2785|148|O|132854.79|1995-07-21|2-HIGH|Clerk#000000098|0|iously pending packages sleep according to the blithely unusual foxe|61.1955|-149.9|61.1955|-149.9|
-2786|79|F|178254.66|1992-03-22|2-HIGH|Clerk#000000976|0|al platelets cajole blithely ironic requests. ironic re|61.1893|-149.887|61.1893|-149.887|
-2787|103|O|3726.14|1995-09-30|1-URGENT|Clerk#000000906|0|he ironic, regular |61.2174|-149.888|61.2174|-149.888|
-2788|124|F|17172.66|1994-09-22|1-URGENT|Clerk#000000641|0|nts wake across the fluffily bold accoun|61.2227|-149.842|61.2227|-149.842|
-2789|37|O|219123.27|1998-03-14|2-HIGH|Clerk#000000972|0|gular patterns boost. carefully even re|61.1263|-149.872|61.1263|-149.872|
-2790|25|F|177458.97|1994-08-19|2-HIGH|Clerk#000000679|0| the carefully express deposits sleep slyly |61.1138|-149.866|61.1138|-149.866|
-2791|121|F|156697.55|1994-10-10|2-HIGH|Clerk#000000662|0|as. slyly ironic accounts play furiously bl|61.2157|-149.821|61.2157|-149.821|
-2816|58|F|42225.53|1994-09-20|2-HIGH|Clerk#000000289|0|kages at the final deposits cajole furious foxes. quickly |61.2174|-149.888|61.2174|-149.888|
-2817|40|F|71453.85|1994-04-19|3-MEDIUM|Clerk#000000982|0|ic foxes haggle upon the daringly even pinto beans. slyly|61.1855|-149.868|61.1855|-149.868|
-2818|49|F|120086.84|1994-12-12|3-MEDIUM|Clerk#000000413|0|eep furiously special ideas. express |61.1951|-149.873|61.1951|-149.873|
-2819|103|F|66927.16|1994-05-05|1-URGENT|Clerk#000000769|0|ngside of the blithely ironic dolphins. furio|61.1444|-149.867|61.1444|-149.867|
-2820|19|F|143813.39|1994-05-20|3-MEDIUM|Clerk#000000807|0|equests are furiously. carefu|61.1883|-149.735|61.1883|-149.735|
-2821|118|F|36592.48|1993-08-09|3-MEDIUM|Clerk#000000323|0|ng requests. even instructions are quickly express, silent instructi|61.2161|-149.876|61.2161|-149.876|
-2822|79|F|40142.15|1993-07-26|2-HIGH|Clerk#000000510|0|furiously against the accounts. unusual accounts aft|61.2161|-149.876|61.2161|-149.876|
-2823|79|O|171894.45|1995-09-09|2-HIGH|Clerk#000000567|0|encies. carefully fluffy accounts m|61.1893|-149.888|61.1893|-149.888|
-2848|70|F|116258.53|1992-03-10|1-URGENT|Clerk#000000256|0|ly fluffy foxes sleep furiously across the slyly regu|61.2174|-149.888|61.2174|-149.888|
-2849|46|O|180054.29|1996-04-30|2-HIGH|Clerk#000000659|0|al packages are after the quickly bold requests. carefully special |61.1914|-149.886|61.1914|-149.886|
-2850|100|O|122969.79|1996-10-02|2-HIGH|Clerk#000000392|0|, regular deposits. furiously pending packages hinder carefully carefully u|61.1541|-149.958|61.1541|-149.958|
-2851|145|O|7859.36|1997-09-07|5-LOW|Clerk#000000566|0|Tiresias wake quickly quickly even|61.1259|-149.717|61.1259|-149.717|
-2852|91|F|99050.81|1993-01-16|1-URGENT|Clerk#000000740|0|ruthless deposits against the final instructions use quickly al|61.2193|-149.902|61.2193|-149.902|
-2853|94|F|103641.15|1994-05-05|2-HIGH|Clerk#000000878|0|the carefully even packages.|61.1879|-149.886|61.1879|-149.886|
-2854|139|F|153568.02|1994-06-27|1-URGENT|Clerk#000000010|0| furiously ironic tithes use furiously |61.1372|-149.912|61.1372|-149.912|
-2855|49|F|48419.58|1993-04-04|4-NOT SPECIFIED|Clerk#000000973|0| silent, regular packages sleep |61.1101|-149.857|61.1101|-149.857|
-2880|8|F|145761.99|1992-03-15|2-HIGH|Clerk#000000756|0|ves maintain doggedly spec|61.1791|-149.94|61.1791|-149.94|
-2881|100|F|45695.84|1992-05-10|5-LOW|Clerk#000000864|0|uriously. slyly express requests according to the silent dol|61.2031|-149.749|61.2031|-149.749|
-2882|121|O|172872.37|1995-08-22|2-HIGH|Clerk#000000891|0|pending deposits. carefully eve|61.1914|-149.877|61.1914|-149.877|
-2883|121|F|170360.27|1995-01-23|5-LOW|Clerk#000000180|0|uses. carefully ironic accounts lose fluffil|61.1944|-149.883|61.1944|-149.883|
-2884|92|O|71683.84|1997-10-12|3-MEDIUM|Clerk#000000780|0|efully express instructions sleep against|61.1923|-149.886|61.1923|-149.886|
-2885|7|F|146896.72|1992-09-19|4-NOT SPECIFIED|Clerk#000000280|0|ly sometimes special excuses. final requests are |61.2123|-149.854|61.2123|-149.854|
-2886|109|F|94527.23|1994-11-13|4-NOT SPECIFIED|Clerk#000000619|0|uctions. ironic packages sle|61.2161|-149.876|61.2161|-149.876|
-2887|109|O|28571.39|1997-05-26|5-LOW|Clerk#000000566|0|slyly even pinto beans. slyly bold epitaphs cajole blithely above t|61.2171|-149.9|61.2171|-149.9|
-2912|94|F|27727.52|1992-03-12|5-LOW|Clerk#000000186|0|jole blithely above the quickly regular packages. carefully regular pinto bean|61.1125|-149.861|61.1125|-149.861|
-2913|43|O|130702.19|1997-07-12|3-MEDIUM|Clerk#000000118|0|mptotes doubt furiously slyly regu|61.1419|-149.896|61.1419|-149.896|
-2914|109|F|60867.14|1993-03-03|3-MEDIUM|Clerk#000000543|0|he slyly regular theodolites are furiously sile|61.145|-149.878|61.145|-149.878|
-2915|94|F|96015.13|1994-03-31|5-LOW|Clerk#000000410|0|ld packages. bold deposits boost blithely. ironic, unusual theodoli|61.1044|-149.865|61.1044|-149.865|
-2916|8|O|20182.22|1995-12-27|2-HIGH|Clerk#000000681|0|ithely blithe deposits sleep beyond the|61.1444|-149.876|61.1444|-149.876|
-2917|91|O|100714.13|1997-12-09|4-NOT SPECIFIED|Clerk#000000061|0| special dugouts among the special deposi|61.1|-149.85|61.1|-149.85|
-2918|118|O|21760.09|1996-09-08|3-MEDIUM|Clerk#000000439|0|ular deposits across th|61.1105|-149.861|61.1105|-149.861|
-2919|53|F|137223.14|1993-12-10|2-HIGH|Clerk#000000209|0|es. pearls wake quietly slyly ironic instructions--|61.1286|-149.957|61.1286|-149.957|
-2944|14|O|146581.14|1997-09-24|4-NOT SPECIFIED|Clerk#000000740|0|deas. permanently special foxes haggle carefully ab|61.1201|-149.89|61.1201|-149.89|
-2945|29|O|223507.72|1996-01-03|2-HIGH|Clerk#000000499|0|ons are carefully toward the permanent, bold pinto beans. regu|61.112|-149.871|61.112|-149.871|
-2946|125|O|102226.59|1996-02-05|5-LOW|Clerk#000000329|0|g instructions about the regular accounts sleep carefully along the pen|61.1427|-149.864|61.1427|-149.864|
-2947|70|P|43360.95|1995-04-26|1-URGENT|Clerk#000000464|0|ronic accounts. accounts run furiously d|61.1212|-149.947|61.1212|-149.947|
-2948|44|F|100758.71|1994-08-23|5-LOW|Clerk#000000701|0| deposits according to the blithely pending |61.1228|-149.939|61.1228|-149.939|
-2949|137|F|94231.71|1994-04-12|2-HIGH|Clerk#000000184|0|y ironic accounts use. quickly blithe accou|61.1093|-149.871|61.1093|-149.871|
-2950|136|O|183620.33|1997-07-06|1-URGENT|Clerk#000000833|0| dolphins around the furiously |61.145|-149.878|61.145|-149.878|
-2951|74|O|125509.17|1996-02-06|2-HIGH|Clerk#000000680|0|gular deposits above the finally regular ideas integrate idly stealthil|61.1191|-149.871|61.1191|-149.871|
-2976|29|F|145768.47|1993-12-10|4-NOT SPECIFIED|Clerk#000000159|0|. furiously ironic asymptotes haggle ruthlessly silently regular r|61.1003|-149.856|61.1003|-149.856|
-2977|73|O|25170.88|1996-08-27|3-MEDIUM|Clerk#000000252|0|quickly special platelets are furio|61.1113|-149.872|61.1113|-149.872|
-2978|44|P|139542.14|1995-05-03|1-URGENT|Clerk#000000135|0|d. even platelets are. ironic dependencies cajole slow, e|61.1084|-149.861|61.1084|-149.861|
-2979|133|O|116789.98|1996-03-23|3-MEDIUM|Clerk#000000820|0|even, ironic foxes sleep along|61.144|-149.878|61.144|-149.878|
-2980|4|O|187514.11|1996-09-14|3-MEDIUM|Clerk#000000661|0|y quick pinto beans wake. slyly re|61.1426|-149.877|61.1426|-149.877|
-2981|49|O|37776.79|1998-07-29|5-LOW|Clerk#000000299|0|hely among the express foxes. blithely stealthy requests cajole boldly. regu|61.1173|-149.861|61.1173|-149.861|
-2982|85|F|55582.94|1995-03-19|2-HIGH|Clerk#000000402|0|lyly. express theodolites affix slyly after the slyly speci|61.1347|-149.914|61.1347|-149.914|
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/pom.xml b/hyracks/hyracks-examples/hyracks-integration-tests/pom.xml
index f019b44..7c38b13 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/pom.xml
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/pom.xml
@@ -1,96 +1,108 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks.examples</groupId>
-  <artifactId>hyracks-integration-tests</artifactId>
-  <name>hyracks-integration-tests</name>
-  <parent>
-    <groupId>edu.uci.ics.hyracks</groupId>
-    <artifactId>hyracks-examples</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
-  </parent>
-
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>2.0.2</version>
-        <configuration>
-          <source>1.7</source>
-          <target>1.7</target>
-          <fork>true</fork>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-  <dependencies>
-  	<dependency>
-  		<groupId>junit</groupId>
-  		<artifactId>junit</artifactId>
-  		<version>4.8.1</version>
-  		<type>jar</type>
-  		<scope>test</scope>
-  	</dependency>
-  	<dependency>
-        <groupId>edu.uci.ics.hyracks</groupId>
-        <artifactId>hyracks-client</artifactId>
-        <version>0.2.4-SNAPSHOT</version>
-        <type>jar</type>
-        <scope>compile</scope>
-    </dependency>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>compile</scope>
-  	</dependency>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-control-cc</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>compile</scope>
-  	</dependency>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-control-nc</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>compile</scope>
-  	</dependency>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>compile</scope>
-  	</dependency>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-storage-am-invertedindex</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>compile</scope>
-  	</dependency>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-storage-am-rtree</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>compile</scope>
-  	</dependency>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>test</scope>
-  	</dependency>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-data-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  	</dependency>
-  </dependencies>
+	<modelVersion>4.0.0</modelVersion>
+	<groupId>edu.uci.ics.hyracks.examples</groupId>
+	<artifactId>hyracks-integration-tests</artifactId>
+	<name>hyracks-integration-tests</name>
+	<parent>
+		<groupId>edu.uci.ics.hyracks</groupId>
+		<artifactId>hyracks-examples</artifactId>
+		<version>0.2.5-SNAPSHOT</version>
+	</parent>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>2.0.2</version>
+				<configuration>
+					<source>1.7</source>
+					<target>1.7</target>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+	<dependencies>
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<version>4.8.1</version>
+			<type>jar</type>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-dataflow-std</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-control-cc</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-control-nc</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-storage-am-btree</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-storage-am-rtree</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-storage-am-lsm-btree</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-storage-am-lsm-rtree</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-storage-am-lsm-invertedindex</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-test-support</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-data-std</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+		</dependency>
+  	    <dependency>
+            <groupId>edu.uci.ics.hyracks</groupId>
+            <artifactId>hyracks-client</artifactId>
+            <version>0.2.5-SNAPSHOT</version>
+            <type>jar</type>
+            <scope>compile</scope>
+        </dependency>
+	</dependencies>
 </project>
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/AbstractBTreeOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/AbstractBTreeOperatorTest.java
new file mode 100644
index 0000000..0af1193
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/AbstractBTreeOperatorTest.java
@@ -0,0 +1,327 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.btree;
+
+import java.io.DataOutput;
+import java.io.File;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
+import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.misc.NullSinkOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDropOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexInsertUpdateDeleteOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.TransientLocalResourceFactoryProvider;
+import edu.uci.ics.hyracks.test.support.TestIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
+import edu.uci.ics.hyracks.tests.am.common.ITreeIndexOperatorTestHelper;
+import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+
+public abstract class AbstractBTreeOperatorTest extends AbstractIntegrationTest {
+    static {
+        TestStorageManagerComponentHolder.init(8192, 20, 20);
+    }
+
+    protected final IStorageManagerInterface storageManager = new TestStorageManagerInterface();
+    protected final IIndexLifecycleManagerProvider lcManagerProvider = new TestIndexLifecycleManagerProvider();
+    protected IIndexDataflowHelperFactory dataflowHelperFactory;
+
+    // field, type and key declarations for primary index
+    protected final int primaryFieldCount = 6;
+    protected final ITypeTraits[] primaryTypeTraits = new ITypeTraits[primaryFieldCount];
+    protected final int primaryKeyFieldCount = 1;
+    protected final IBinaryComparatorFactory[] primaryComparatorFactories = new IBinaryComparatorFactory[primaryKeyFieldCount];
+    protected final int[] primaryBloomFilterKeyFields = new int[primaryKeyFieldCount];
+
+    protected final RecordDescriptor primaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
+
+    // to be set by subclasses
+    protected String primaryFileName;
+    protected IFileSplitProvider primarySplitProvider;
+
+    // field, type and key declarations for secondary indexes
+    protected final int secondaryFieldCount = 2;
+    protected final ITypeTraits[] secondaryTypeTraits = new ITypeTraits[secondaryFieldCount];
+    protected final int secondaryKeyFieldCount = 2;
+    protected final IBinaryComparatorFactory[] secondaryComparatorFactories = new IBinaryComparatorFactory[secondaryKeyFieldCount];
+    protected final int[] secondaryBloomFilterKeyFields = new int[secondaryKeyFieldCount];
+
+    protected final RecordDescriptor secondaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
+
+    protected String secondaryFileName;
+    protected IFileSplitProvider secondarySplitProvider;
+
+    protected ITreeIndexOperatorTestHelper testHelper;
+
+    protected ITreeIndexOperatorTestHelper createTestHelper() throws HyracksException {
+        return new BTreeOperatorTestHelper();
+    }
+
+    @Before
+    public void setup() throws Exception {
+        testHelper = createTestHelper();
+        dataflowHelperFactory = createDataFlowHelperFactory();
+        primaryFileName = testHelper.getPrimaryIndexName();
+        primarySplitProvider = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID, new FileReference(
+                new File(primaryFileName))) });
+        secondaryFileName = testHelper.getSecondaryIndexName();
+        secondarySplitProvider = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                new FileReference(new File(secondaryFileName))) });
+
+        // field, type and key declarations for primary index
+        primaryTypeTraits[0] = UTF8StringPointable.TYPE_TRAITS;
+        primaryTypeTraits[1] = UTF8StringPointable.TYPE_TRAITS;
+        primaryTypeTraits[2] = UTF8StringPointable.TYPE_TRAITS;
+        primaryTypeTraits[3] = UTF8StringPointable.TYPE_TRAITS;
+        primaryTypeTraits[4] = UTF8StringPointable.TYPE_TRAITS;
+        primaryTypeTraits[5] = UTF8StringPointable.TYPE_TRAITS;
+        primaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
+        primaryBloomFilterKeyFields[0] = 0;
+
+        // field, type and key declarations for secondary indexes
+        secondaryTypeTraits[0] = UTF8StringPointable.TYPE_TRAITS;
+        secondaryTypeTraits[1] = UTF8StringPointable.TYPE_TRAITS;
+        secondaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
+        secondaryComparatorFactories[1] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
+        secondaryBloomFilterKeyFields[0] = 0;
+        secondaryBloomFilterKeyFields[1] = 1;
+    }
+
+    protected abstract IIndexDataflowHelperFactory createDataFlowHelperFactory();
+
+    public void createPrimaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+        TransientLocalResourceFactoryProvider localResourceFactoryProvider = new TransientLocalResourceFactoryProvider();
+        TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
+                lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                primaryBloomFilterKeyFields, dataflowHelperFactory, localResourceFactoryProvider,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
+        spec.addRoot(primaryCreateOp);
+        runTest(spec);
+    }
+
+    protected void loadPrimaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        FileSplit[] ordersSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
+                "data/tpch0.001/orders-part1.tbl"))) };
+        IFileSplitProvider ordersSplitProvider = new ConstantFileSplitProvider(ordersSplits);
+        RecordDescriptor ordersDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE });
+
+        FileScanOperatorDescriptor ordScanner = new FileScanOperatorDescriptor(spec, ordersSplitProvider,
+                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE }, '|'), ordersDesc);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, ordScanner, NC1_ID);
+
+        ExternalSortOperatorDescriptor sorter = new ExternalSortOperatorDescriptor(spec, 1000, new int[] { 0 },
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                ordersDesc);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID);
+
+        int[] fieldPermutation = { 0, 1, 2, 4, 5, 7 };
+        TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
+                storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                primaryBloomFilterKeyFields, fieldPermutation, 0.7f, true, 1000L, dataflowHelperFactory,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), sorter, 0, primaryBtreeBulkLoad, 0);
+
+        spec.addRoot(primaryBtreeBulkLoad);
+        runTest(spec);
+    }
+
+    public void createSecondaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+        TransientLocalResourceFactoryProvider localResourceFactoryProvider = new TransientLocalResourceFactoryProvider();
+        TreeIndexCreateOperatorDescriptor secondaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec,
+                storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, secondaryBloomFilterKeyFields, dataflowHelperFactory,
+                localResourceFactoryProvider, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryCreateOp, NC1_ID);
+        spec.addRoot(secondaryCreateOp);
+        runTest(spec);
+    }
+
+    protected void loadSecondaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        // build dummy tuple containing nothing
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(primaryKeyFieldCount * 2);
+        DataOutput dos = tb.getDataOutput();
+
+        tb.reset();
+        UTF8StringSerializerDeserializer.INSTANCE.serialize("0", dos);
+        tb.addFieldEndOffset();
+
+        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE };
+        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
+
+        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
+                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
+
+        int[] lowKeyFields = null; // - infinity
+        int[] highKeyFields = null; // + infinity
+
+        // scan primary index
+        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
+                storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                primaryBloomFilterKeyFields, lowKeyFields, highKeyFields, true, true, dataflowHelperFactory, false,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
+
+        // sort based on secondary keys
+        ExternalSortOperatorDescriptor sorter = new ExternalSortOperatorDescriptor(spec, 1000, new int[] { 3, 0 },
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) }, primaryRecDesc);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID);
+
+        // load secondary index
+        int[] fieldPermutation = { 3, 0 };
+        TreeIndexBulkLoadOperatorDescriptor secondaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
+                storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, secondaryBloomFilterKeyFields, fieldPermutation, 0.7f, true, 1000L,
+                dataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeBulkLoad, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryBtreeSearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeSearchOp, 0, sorter, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), sorter, 0, secondaryBtreeBulkLoad, 0);
+
+        spec.addRoot(secondaryBtreeBulkLoad);
+        runTest(spec);
+    }
+
+    protected void insertPipeline(boolean useUpsert) throws Exception {
+        IndexOperation pipelineOperation = useUpsert ? IndexOperation.UPSERT : IndexOperation.INSERT;
+        JobSpecification spec = new JobSpecification();
+
+        FileSplit[] ordersSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
+                "data/tpch0.001/orders-part2.tbl"))) };
+        IFileSplitProvider ordersSplitProvider = new ConstantFileSplitProvider(ordersSplits);
+        RecordDescriptor ordersDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE });
+
+        FileScanOperatorDescriptor ordScanner = new FileScanOperatorDescriptor(spec, ordersSplitProvider,
+                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE }, '|'), ordersDesc);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, ordScanner, NC1_ID);
+
+        // insert into primary index
+        int[] primaryFieldPermutation = { 0, 1, 2, 4, 5, 7 };
+        TreeIndexInsertUpdateDeleteOperatorDescriptor primaryBtreeInsertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
+                spec, ordersDesc, storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, primaryBloomFilterKeyFields, primaryFieldPermutation, pipelineOperation,
+                dataflowHelperFactory, null, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeInsertOp, NC1_ID);
+
+        // first secondary index
+        int[] fieldPermutationB = { 4, 0 };
+        TreeIndexInsertUpdateDeleteOperatorDescriptor secondaryInsertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
+                spec, ordersDesc, storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, secondaryBloomFilterKeyFields, fieldPermutationB, pipelineOperation,
+                dataflowHelperFactory, null, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryInsertOp, NC1_ID);
+
+        NullSinkOperatorDescriptor nullSink = new NullSinkOperatorDescriptor(spec);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, nullSink, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, primaryBtreeInsertOp, 0);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeInsertOp, 0, secondaryInsertOp, 0);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), secondaryInsertOp, 0, nullSink, 0);
+
+        spec.addRoot(nullSink);
+        runTest(spec);
+    }
+
+    protected void destroyPrimaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+        IndexDropOperatorDescriptor primaryDropOp = new IndexDropOperatorDescriptor(spec, storageManager,
+                lcManagerProvider, primarySplitProvider, dataflowHelperFactory);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryDropOp, NC1_ID);
+        spec.addRoot(primaryDropOp);
+        runTest(spec);
+    }
+
+    protected void destroySecondaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+        IndexDropOperatorDescriptor secondaryDropOp = new IndexDropOperatorDescriptor(spec, storageManager,
+                lcManagerProvider, secondarySplitProvider, dataflowHelperFactory);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryDropOp, NC1_ID);
+        spec.addRoot(secondaryDropOp);
+        runTest(spec);
+    }
+
+    @After
+    public abstract void cleanup() throws Exception;
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeOperatorTestHelper.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeOperatorTestHelper.java
new file mode 100644
index 0000000..337bfda
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeOperatorTestHelper.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.btree;
+
+import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.tests.am.common.TreeOperatorTestHelper;
+
+public class BTreeOperatorTestHelper extends TreeOperatorTestHelper {
+
+    public IIndexDataflowHelperFactory createDataFlowHelperFactory() {
+        return new BTreeDataflowHelperFactory();
+    }
+
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexScanOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexScanOperatorTest.java
new file mode 100644
index 0000000..7e1c42a
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexScanOperatorTest.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.btree;
+
+import java.io.DataOutput;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+
+public class BTreePrimaryIndexScanOperatorTest extends AbstractBTreeOperatorTest {
+
+    @Before
+    public void setup() throws Exception {
+        super.setup();
+        createPrimaryIndex();
+        loadPrimaryIndex();
+    }
+
+    @Test
+    public void scanPrimaryIndexTest() throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        // build dummy tuple containing nothing
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(primaryKeyFieldCount * 2);
+        DataOutput dos = tb.getDataOutput();
+
+        tb.reset();
+        UTF8StringSerializerDeserializer.INSTANCE.serialize("0", dos);
+        tb.addFieldEndOffset();
+
+        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE };
+        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
+
+        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
+                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
+
+        int[] lowKeyFields = null; // - infinity
+        int[] highKeyFields = null; // + infinity
+
+        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
+                storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                primaryBloomFilterKeyFields, lowKeyFields, highKeyFields, true, true, dataflowHelperFactory, false,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
+
+        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                createTempFile().getAbsolutePath()) });
+        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryBtreeSearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeSearchOp, 0, printer, 0);
+
+        spec.addRoot(printer);
+        runTest(spec);
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory() {
+        return ((BTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory();
+    }
+
+    @Override
+    public void cleanup() throws Exception {
+        destroyPrimaryIndex();
+    }
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexSearchOperatorTest.java
new file mode 100644
index 0000000..64bc657
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexSearchOperatorTest.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.btree;
+
+import java.io.DataOutput;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+
+public class BTreePrimaryIndexSearchOperatorTest extends AbstractBTreeOperatorTest {
+
+    @Before
+    public void setup() throws Exception {
+        super.setup();
+        createPrimaryIndex();
+        loadPrimaryIndex();
+    }
+
+    @Test
+    public void searchPrimaryIndexTest() throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        // build tuple containing low and high search key
+        // high key and low key
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(primaryKeyFieldCount * 2);
+        DataOutput dos = tb.getDataOutput();
+
+        tb.reset();
+        // low key
+        UTF8StringSerializerDeserializer.INSTANCE.serialize("100", dos);
+        tb.addFieldEndOffset();
+        // high key
+        UTF8StringSerializerDeserializer.INSTANCE.serialize("200", dos);
+        tb.addFieldEndOffset();
+
+        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE };
+        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
+
+        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
+                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
+
+        int[] lowKeyFields = { 0 };
+        int[] highKeyFields = { 1 };
+
+        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
+                storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                primaryBloomFilterKeyFields, lowKeyFields, highKeyFields, true, true, dataflowHelperFactory, false,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
+
+        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                createTempFile().getAbsolutePath()) });
+        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryBtreeSearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeSearchOp, 0, printer, 0);
+
+        spec.addRoot(printer);
+        runTest(spec);
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory() {
+        return ((BTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory();
+    }
+
+    @Override
+    public void cleanup() throws Exception {
+        destroyPrimaryIndex();
+    }
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexStatsOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexStatsOperatorTest.java
new file mode 100644
index 0000000..c8d95ce
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexStatsOperatorTest.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.btree;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexStatsOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+
+public class BTreePrimaryIndexStatsOperatorTest extends AbstractBTreeOperatorTest {
+
+    @Before
+    public void setup() throws Exception {
+        super.setup();
+        createPrimaryIndex();
+        loadPrimaryIndex();
+    }
+
+    @Test
+    public void showPrimaryIndexStats() throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        TreeIndexStatsOperatorDescriptor primaryStatsOp = new TreeIndexStatsOperatorDescriptor(spec, storageManager,
+                lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                primaryBloomFilterKeyFields, dataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryStatsOp, NC1_ID);
+        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                createTempFile().getAbsolutePath()) });
+        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), primaryStatsOp, 0, printer, 0);
+        spec.addRoot(printer);
+        runTest(spec);
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory() {
+        return ((BTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory();
+    }
+
+    @Override
+    public void cleanup() throws Exception {
+        destroyPrimaryIndex();
+    }
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexInsertOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexInsertOperatorTest.java
new file mode 100644
index 0000000..5a600a6
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexInsertOperatorTest.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.btree;
+
+import java.io.DataOutput;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+
+public class BTreeSecondaryIndexInsertOperatorTest extends AbstractBTreeOperatorTest {
+
+    @Before
+    public void setup() throws Exception {
+        super.setup();
+        createPrimaryIndex();
+        loadPrimaryIndex();
+        createSecondaryIndex();
+        loadSecondaryIndex();
+        insertPipeline(false);
+    }
+
+    @Test
+    public void searchUpdatedSecondaryIndexTest() throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        // build tuple containing search keys (only use the first key as search
+        // key)
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(secondaryKeyFieldCount);
+        DataOutput dos = tb.getDataOutput();
+
+        tb.reset();
+        // low key
+        UTF8StringSerializerDeserializer.INSTANCE.serialize("1998-07-21", dos);
+        tb.addFieldEndOffset();
+        // high key
+        UTF8StringSerializerDeserializer.INSTANCE.serialize("2000-10-18", dos);
+        tb.addFieldEndOffset();
+
+        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE };
+        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
+
+        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
+                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
+
+        int[] secondaryLowKeyFields = { 0 };
+        int[] secondaryHighKeyFields = { 1 };
+
+        // search secondary index
+        BTreeSearchOperatorDescriptor secondaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec,
+                secondaryRecDesc, storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, secondaryBloomFilterKeyFields, secondaryLowKeyFields,
+                secondaryHighKeyFields, true, true, dataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeSearchOp, NC1_ID);
+
+        // second field from the tuples coming from secondary index
+        int[] primaryLowKeyFields = { 1 };
+        // second field from the tuples coming from secondary index
+        int[] primaryHighKeyFields = { 1 };
+
+        // search primary index
+        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
+                storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                primaryBloomFilterKeyFields, primaryLowKeyFields, primaryHighKeyFields, true, true,
+                dataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
+
+        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                createTempFile().getAbsolutePath()) });
+        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, secondaryBtreeSearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), secondaryBtreeSearchOp, 0, primaryBtreeSearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeSearchOp, 0, printer, 0);
+
+        spec.addRoot(printer);
+        runTest(spec);
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory() {
+        return ((BTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory();
+    }
+
+    @Override
+    public void cleanup() throws Exception {
+        destroyPrimaryIndex();
+        destroySecondaryIndex();
+    }
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexSearchOperatorTest.java
new file mode 100644
index 0000000..e3005cf
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexSearchOperatorTest.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.btree;
+
+import java.io.DataOutput;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+
+public class BTreeSecondaryIndexSearchOperatorTest extends AbstractBTreeOperatorTest {
+
+    @Before
+    public void setup() throws Exception {
+        super.setup();
+        createPrimaryIndex();
+        loadPrimaryIndex();
+        createSecondaryIndex();
+        loadSecondaryIndex();
+    }
+
+    @Test
+    public void searchSecondaryIndexTest() throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        // build tuple containing search keys (only use the first key as search
+        // key)
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(secondaryKeyFieldCount);
+        DataOutput dos = tb.getDataOutput();
+
+        tb.reset();
+        // low key
+        UTF8StringSerializerDeserializer.INSTANCE.serialize("1998-07-21", dos);
+        tb.addFieldEndOffset();
+        // high key
+        UTF8StringSerializerDeserializer.INSTANCE.serialize("2000-10-18", dos);
+        tb.addFieldEndOffset();
+
+        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE };
+        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
+
+        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
+                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
+
+        int[] secondaryLowKeyFields = { 0 };
+        int[] secondaryHighKeyFields = { 1 };
+
+        // search secondary index
+        BTreeSearchOperatorDescriptor secondaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec,
+                secondaryRecDesc, storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, secondaryBloomFilterKeyFields, secondaryLowKeyFields,
+                secondaryHighKeyFields, true, true, dataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeSearchOp, NC1_ID);
+
+        int[] primaryLowKeyFields = { 1 }; // second field from the tuples
+        // coming from secondary index
+        int[] primaryHighKeyFields = { 1 }; // second field from the tuples
+        // coming from secondary index
+
+        // search primary index
+        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
+                storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                primaryBloomFilterKeyFields, primaryLowKeyFields, primaryHighKeyFields, true, true,
+                dataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
+
+        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                createTempFile().getAbsolutePath()) });
+        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, secondaryBtreeSearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), secondaryBtreeSearchOp, 0, primaryBtreeSearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeSearchOp, 0, printer, 0);
+
+        spec.addRoot(printer);
+        runTest(spec);
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory() {
+        return ((BTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory();
+    }
+
+    @Override
+    public void cleanup() throws Exception {
+        destroyPrimaryIndex();
+        destroySecondaryIndex();
+    }
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexUpsertOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexUpsertOperatorTest.java
new file mode 100644
index 0000000..758e926
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexUpsertOperatorTest.java
@@ -0,0 +1,107 @@
+package edu.uci.ics.hyracks.tests.am.btree;
+
+import java.io.DataOutput;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+
+public class BTreeSecondaryIndexUpsertOperatorTest extends AbstractBTreeOperatorTest {
+
+    @Before
+    public void setup() throws Exception {
+        super.setup();
+        createPrimaryIndex();
+        loadPrimaryIndex();
+        createSecondaryIndex();
+        loadSecondaryIndex();
+        insertPipeline(true);
+    }
+
+    @Test
+    public void searchUpdatedSecondaryIndexTest() throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        // build tuple containing search keys (only use the first key as search
+        // key)
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(secondaryKeyFieldCount);
+        DataOutput dos = tb.getDataOutput();
+
+        tb.reset();
+        // low key
+        UTF8StringSerializerDeserializer.INSTANCE.serialize("1998-07-21", dos);
+        tb.addFieldEndOffset();
+        // high key
+        UTF8StringSerializerDeserializer.INSTANCE.serialize("2000-10-18", dos);
+        tb.addFieldEndOffset();
+
+        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE };
+        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
+
+        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
+                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
+
+        int[] secondaryLowKeyFields = { 0 };
+        int[] secondaryHighKeyFields = { 1 };
+
+        // search secondary index
+        BTreeSearchOperatorDescriptor secondaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec,
+                secondaryRecDesc, storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, secondaryBloomFilterKeyFields, secondaryLowKeyFields,
+                secondaryHighKeyFields, true, true, dataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeSearchOp, NC1_ID);
+
+        // second field from the tuples coming from secondary index
+        int[] primaryLowKeyFields = { 1 };
+        // second field from the tuples coming from secondary index
+        int[] primaryHighKeyFields = { 1 };
+
+        // search primary index
+        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
+                storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                primaryBloomFilterKeyFields, primaryLowKeyFields, primaryHighKeyFields, true, true,
+                dataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
+
+        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                createTempFile().getAbsolutePath()) });
+        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, secondaryBtreeSearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), secondaryBtreeSearchOp, 0, primaryBtreeSearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeSearchOp, 0, printer, 0);
+
+        spec.addRoot(printer);
+        runTest(spec);
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory() {
+        return ((BTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory();
+    }
+
+    @Override
+    public void cleanup() throws Exception {
+        destroyPrimaryIndex();
+        destroySecondaryIndex();
+    }
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/common/ITreeIndexOperatorTestHelper.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/common/ITreeIndexOperatorTestHelper.java
new file mode 100644
index 0000000..f0c4519
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/common/ITreeIndexOperatorTestHelper.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.common;
+
+public interface ITreeIndexOperatorTestHelper {
+    public String getPrimaryIndexName();
+
+    public String getSecondaryIndexName();
+
+    public void cleanup(String primaryFileName, String secondaryFileName);
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/common/LSMTreeOperatorTestHelper.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/common/LSMTreeOperatorTestHelper.java
new file mode 100644
index 0000000..80b5285
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/common/LSMTreeOperatorTestHelper.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.common;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.util.Date;
+
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.control.nc.io.IOManager;
+
+public class LSMTreeOperatorTestHelper extends TreeOperatorTestHelper {
+
+    protected final IOManager ioManager;
+
+    public LSMTreeOperatorTestHelper(IOManager ioManager) {
+        this.ioManager = ioManager;
+    }
+
+    public String getPrimaryIndexName() {
+        return "primary" + simpleDateFormat.format(new Date());
+    }
+
+    public String getSecondaryIndexName() {
+        return "secondary" + simpleDateFormat.format(new Date());
+    }
+
+    @Override
+    public void cleanup(String primaryFileName, String secondaryFileName) {
+        for (IODeviceHandle dev : ioManager.getIODevices()) {
+            File primaryDir = new File(dev.getPath(), primaryFileName);
+            cleanupDir(primaryDir);
+            File secondaryDir = new File(dev.getPath(), secondaryFileName);
+            cleanupDir(secondaryDir);
+        }
+    }
+
+    private void cleanupDir(File dir) {
+        if (!dir.exists()) {
+            return;
+        }
+        FilenameFilter filter = new FilenameFilter() {
+            public boolean accept(File dir, String name) {
+                return !name.startsWith(".");
+            }
+        };
+        String[] files = dir.list(filter);
+        if (files != null) {
+            for (String fileName : files) {
+                File file = new File(dir.getPath() + File.separator + fileName);
+                file.delete();
+            }
+        }
+        dir.delete();
+    }
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/common/TreeOperatorTestHelper.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/common/TreeOperatorTestHelper.java
new file mode 100644
index 0000000..935724b
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/common/TreeOperatorTestHelper.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.common;
+
+import java.io.File;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class TreeOperatorTestHelper implements ITreeIndexOperatorTestHelper {
+
+    protected final SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
+    protected final String sep = System.getProperty("file.separator");
+    protected static int DEFAULT_MEM_PAGE_SIZE = 32768;
+    protected static int DEFAULT_MEM_NUM_PAGES = 1000;
+
+    public String getPrimaryIndexName() {
+        return System.getProperty("java.io.tmpdir") + sep + "primary" + simpleDateFormat.format(new Date());
+    }
+
+    public String getSecondaryIndexName() {
+        return System.getProperty("java.io.tmpdir") + sep + "secondary" + simpleDateFormat.format(new Date());
+    }
+
+    @Override
+    public void cleanup(String primaryFileName, String secondaryFileName) {
+        File primary = new File(primaryFileName);
+        if (primary.exists()) {
+            primary.deleteOnExit();
+        }
+        File secondary = new File(secondaryFileName);
+        if (secondary.exists()) {
+            secondary.deleteOnExit();
+        }
+    }
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/AbstractfWordInvertedIndexTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/AbstractfWordInvertedIndexTest.java
new file mode 100644
index 0000000..808afac
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/AbstractfWordInvertedIndexTest.java
@@ -0,0 +1,346 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.invertedindex;
+
+import java.io.DataOutput;
+import java.io.File;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
+import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.IntegerParserFactory;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
+import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifierFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow.BinaryTokenizerOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow.LSMInvertedIndexBulkLoadOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow.LSMInvertedIndexCreateOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow.LSMInvertedIndexSearchOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.ConjunctiveSearchModifierFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.DelimitedUTF8StringBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.ITokenFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.UTF8WordTokenFactory;
+import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceFactoryProvider;
+import edu.uci.ics.hyracks.storage.common.file.TransientLocalResourceFactoryProvider;
+import edu.uci.ics.hyracks.test.support.TestIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
+import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+
+@SuppressWarnings("rawtypes")
+public abstract class AbstractfWordInvertedIndexTest extends AbstractIntegrationTest {
+    static {
+        TestStorageManagerComponentHolder.init(8192, 20, 20);
+    }
+
+    protected static final int MERGE_THRESHOLD = 3;
+
+    protected IStorageManagerInterface storageManager = new TestStorageManagerInterface();
+    protected IIndexLifecycleManagerProvider lcManagerProvider = new TestIndexLifecycleManagerProvider();
+    protected IIndexDataflowHelperFactory btreeDataflowHelperFactory = new BTreeDataflowHelperFactory();
+    protected IIndexDataflowHelperFactory invertedIndexDataflowHelperFactory;
+
+    protected final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
+    protected final static String sep = System.getProperty("file.separator");
+    protected final String dateString = simpleDateFormat.format(new Date());
+    protected final String primaryFileName = System.getProperty("java.io.tmpdir") + sep + "primaryBtree" + dateString;
+    protected final String btreeFileName = System.getProperty("java.io.tmpdir") + sep + "invIndexBtree" + dateString;
+
+    protected IFileSplitProvider primaryFileSplitProvider = new ConstantFileSplitProvider(
+            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(primaryFileName))) });
+    protected IFileSplitProvider btreeFileSplitProvider = new ConstantFileSplitProvider(
+            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(btreeFileName))) });
+
+    // Primary BTree index.
+    protected int primaryFieldCount = 2;
+    protected ITypeTraits[] primaryTypeTraits = new ITypeTraits[primaryFieldCount];
+    protected int primaryKeyFieldCount = 1;
+    protected IBinaryComparatorFactory[] primaryComparatorFactories = new IBinaryComparatorFactory[primaryKeyFieldCount];
+    protected RecordDescriptor primaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+            IntegerSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
+
+    // Inverted index BTree dictionary.
+    protected ITypeTraits[] tokenTypeTraits;
+    protected IBinaryComparatorFactory[] tokenComparatorFactories;
+
+    // Inverted index stuff.
+    protected int invListElementFieldCount = 1;
+    protected ITypeTraits[] invListsTypeTraits = new ITypeTraits[invListElementFieldCount];
+    protected IBinaryComparatorFactory[] invListsComparatorFactories = new IBinaryComparatorFactory[invListElementFieldCount];
+    protected RecordDescriptor invListsRecDesc = new RecordDescriptor(
+            new ISerializerDeserializer[] { IntegerSerializerDeserializer.INSTANCE });
+    protected RecordDescriptor tokenizerRecDesc;
+
+    // Tokenizer stuff.
+    protected ITokenFactory tokenFactory = new UTF8WordTokenFactory();
+    protected IBinaryTokenizerFactory tokenizerFactory = new DelimitedUTF8StringBinaryTokenizerFactory(true, false,
+            tokenFactory);
+
+    // Sorting stuff.
+    IBinaryComparatorFactory[] sortComparatorFactories;
+
+    @Before
+    public void setup() throws Exception {
+        prepare();
+
+        // Field declarations and comparators for primary BTree index.
+        primaryTypeTraits[0] = IntegerPointable.TYPE_TRAITS;
+        primaryTypeTraits[1] = UTF8StringPointable.TYPE_TRAITS;
+        primaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+
+        // Field declarations and comparators for inverted lists.
+        invListsTypeTraits[0] = IntegerPointable.TYPE_TRAITS;
+        invListsComparatorFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+
+        createPrimaryIndex();
+        loadPrimaryIndex();
+        printPrimaryIndex();
+        createInvertedIndex();
+        loadInvertedIndex();
+    }
+
+    protected abstract void prepare();
+
+    protected abstract boolean addNumTokensKey();
+
+    public void createPrimaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+        TransientLocalResourceFactoryProvider localResourceFactoryProvider = new TransientLocalResourceFactoryProvider();
+        TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
+                lcManagerProvider, primaryFileSplitProvider, primaryTypeTraits, primaryComparatorFactories, null,
+                btreeDataflowHelperFactory, localResourceFactoryProvider, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
+        spec.addRoot(primaryCreateOp);
+        runTest(spec);
+    }
+
+    public void createInvertedIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+        ILocalResourceFactoryProvider localResourceFactoryProvider = new TransientLocalResourceFactoryProvider();
+        LSMInvertedIndexCreateOperatorDescriptor invIndexCreateOp = new LSMInvertedIndexCreateOperatorDescriptor(spec,
+                storageManager, btreeFileSplitProvider, lcManagerProvider, tokenTypeTraits, tokenComparatorFactories,
+                invListsTypeTraits, invListsComparatorFactories, tokenizerFactory, invertedIndexDataflowHelperFactory,
+                localResourceFactoryProvider, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, invIndexCreateOp, NC1_ID);
+        spec.addRoot(invIndexCreateOp);
+        runTest(spec);
+    }
+
+    @Test
+    public void testConjunctiveSearcher() throws Exception {
+        IInvertedIndexSearchModifierFactory conjunctiveSearchModifierFactory = new ConjunctiveSearchModifierFactory();
+        searchInvertedIndex("of", conjunctiveSearchModifierFactory);
+        searchInvertedIndex("3d", conjunctiveSearchModifierFactory);
+        searchInvertedIndex("of the human", conjunctiveSearchModifierFactory);
+    }
+
+    private IOperatorDescriptor createFileScanOp(JobSpecification spec) {
+        FileSplit[] dblpTitleFileSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
+                "data/cleanednumbereddblptitles.txt"))) };
+        IFileSplitProvider dblpTitleSplitProvider = new ConstantFileSplitProvider(dblpTitleFileSplits);
+        RecordDescriptor dblpTitleRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+                IntegerSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
+        FileScanOperatorDescriptor dblpTitleScanner = new FileScanOperatorDescriptor(spec, dblpTitleSplitProvider,
+                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { IntegerParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE }, '|'), dblpTitleRecDesc);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, dblpTitleScanner, NC1_ID);
+        return dblpTitleScanner;
+    }
+
+    private IOperatorDescriptor createPrimaryBulkLoadOp(JobSpecification spec) {
+        int[] fieldPermutation = { 0, 1 };
+        TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
+                storageManager, lcManagerProvider, primaryFileSplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, null, fieldPermutation, 0.7f, true, 1000L, btreeDataflowHelperFactory,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
+        return primaryBtreeBulkLoad;
+    }
+
+    private IOperatorDescriptor createScanKeyProviderOp(JobSpecification spec) throws HyracksDataException {
+        // build dummy tuple containing nothing
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(primaryKeyFieldCount * 2);
+        DataOutput dos = tb.getDataOutput();
+        tb.reset();
+        UTF8StringSerializerDeserializer.INSTANCE.serialize("0", dos);
+        tb.addFieldEndOffset();
+        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE };
+        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
+        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
+                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
+        return keyProviderOp;
+    }
+
+    private IOperatorDescriptor createPrimaryScanOp(JobSpecification spec) throws HyracksDataException {
+        int[] lowKeyFields = null; // - infinity
+        int[] highKeyFields = null; // + infinity
+        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
+                storageManager, lcManagerProvider, primaryFileSplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, null, lowKeyFields, highKeyFields, true, true, btreeDataflowHelperFactory,
+                false, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
+        return primaryBtreeSearchOp;
+    }
+
+    private void loadPrimaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+        // Assuming that the data is pre-sorted on the key. No need to sort
+        // before bulk load.
+        IOperatorDescriptor fileScanOp = createFileScanOp(spec);
+        IOperatorDescriptor primaryBulkLoad = createPrimaryBulkLoadOp(spec);
+        spec.connect(new OneToOneConnectorDescriptor(spec), fileScanOp, 0, primaryBulkLoad, 0);
+        spec.addRoot(primaryBulkLoad);
+        runTest(spec);
+    }
+
+    private void printPrimaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+        IOperatorDescriptor keyProviderOp = createScanKeyProviderOp(spec);
+        IOperatorDescriptor primaryScanOp = createPrimaryScanOp(spec);
+        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                createTempFile().getAbsolutePath()) });
+        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryScanOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), primaryScanOp, 0, printer, 0);
+        spec.addRoot(printer);
+        runTest(spec);
+    }
+
+    private IOperatorDescriptor createExternalSortOp(JobSpecification spec, int[] sortFields,
+            RecordDescriptor outputRecDesc) {
+        ExternalSortOperatorDescriptor externalSortOp = new ExternalSortOperatorDescriptor(spec, 1000, sortFields,
+                sortComparatorFactories, outputRecDesc);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, externalSortOp, NC1_ID);
+        return externalSortOp;
+    }
+
+    private IOperatorDescriptor createBinaryTokenizerOp(JobSpecification spec, int docField, int[] keyFields) {
+        BinaryTokenizerOperatorDescriptor binaryTokenizer = new BinaryTokenizerOperatorDescriptor(spec,
+                tokenizerRecDesc, tokenizerFactory, docField, keyFields, addNumTokensKey());
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, binaryTokenizer, NC1_ID);
+        return binaryTokenizer;
+    }
+
+    private IOperatorDescriptor createInvertedIndexBulkLoadOp(JobSpecification spec, int[] fieldPermutation) {
+        LSMInvertedIndexBulkLoadOperatorDescriptor invIndexBulkLoadOp = new LSMInvertedIndexBulkLoadOperatorDescriptor(
+                spec, fieldPermutation, true, 1000L, storageManager, btreeFileSplitProvider, lcManagerProvider,
+                tokenTypeTraits, tokenComparatorFactories, invListsTypeTraits, invListsComparatorFactories,
+                tokenizerFactory, invertedIndexDataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, invIndexBulkLoadOp, NC1_ID);
+        return invIndexBulkLoadOp;
+    }
+
+    public void loadInvertedIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+        IOperatorDescriptor keyProviderOp = createScanKeyProviderOp(spec);
+        IOperatorDescriptor primaryScanOp = createPrimaryScanOp(spec);
+        int docField = 1;
+        int[] keyFields = { 0 };
+        IOperatorDescriptor binaryTokenizerOp = createBinaryTokenizerOp(spec, docField, keyFields);
+        int[] sortFields = new int[sortComparatorFactories.length];
+        int[] fieldPermutation = new int[sortComparatorFactories.length];
+        for (int i = 0; i < sortFields.length; i++) {
+            sortFields[i] = i;
+            fieldPermutation[i] = i;
+        }
+        IOperatorDescriptor externalSortOp = createExternalSortOp(spec, sortFields, tokenizerRecDesc);
+        IOperatorDescriptor invIndexBulkLoadOp = createInvertedIndexBulkLoadOp(spec, fieldPermutation);
+        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryScanOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), primaryScanOp, 0, binaryTokenizerOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), binaryTokenizerOp, 0, externalSortOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), externalSortOp, 0, invIndexBulkLoadOp, 0);
+        spec.addRoot(invIndexBulkLoadOp);
+        runTest(spec);
+    }
+
+    private IOperatorDescriptor createQueryProviderOp(JobSpecification spec, String queryString)
+            throws HyracksDataException {
+        // Build tuple with exactly one field, which is the query,
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(1);
+        DataOutput dos = tb.getDataOutput();
+        tb.reset();
+        UTF8StringSerializerDeserializer.INSTANCE.serialize(queryString, dos);
+        tb.addFieldEndOffset();
+        ISerializerDeserializer[] querySerde = { UTF8StringSerializerDeserializer.INSTANCE };
+        RecordDescriptor queryRecDesc = new RecordDescriptor(querySerde);
+        ConstantTupleSourceOperatorDescriptor queryProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
+                queryRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, queryProviderOp, NC1_ID);
+        return queryProviderOp;
+    }
+
+    private IOperatorDescriptor createInvertedIndexSearchOp(JobSpecification spec,
+            IInvertedIndexSearchModifierFactory searchModifierFactory) {
+        LSMInvertedIndexSearchOperatorDescriptor invIndexSearchOp = new LSMInvertedIndexSearchOperatorDescriptor(spec,
+                0, storageManager, btreeFileSplitProvider, lcManagerProvider, tokenTypeTraits,
+                tokenComparatorFactories, invListsTypeTraits, invListsComparatorFactories,
+                invertedIndexDataflowHelperFactory, tokenizerFactory, searchModifierFactory, invListsRecDesc, false,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, invIndexSearchOp, NC1_ID);
+        return invIndexSearchOp;
+    }
+
+    public void searchInvertedIndex(String queryString, IInvertedIndexSearchModifierFactory searchModifierFactory)
+            throws Exception {
+        JobSpecification spec = new JobSpecification();
+        IOperatorDescriptor queryProviderOp = createQueryProviderOp(spec, queryString);
+        IOperatorDescriptor invIndexSearchOp = createInvertedIndexSearchOp(spec, searchModifierFactory);
+        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                createTempFile().getAbsolutePath()) });
+        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        spec.connect(new OneToOneConnectorDescriptor(spec), queryProviderOp, 0, invIndexSearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), invIndexSearchOp, 0, printer, 0);
+        spec.addRoot(printer);
+        runTest(spec);
+    }
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/BinaryTokenizerOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/BinaryTokenizerOperatorTest.java
new file mode 100644
index 0000000..47480da
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/BinaryTokenizerOperatorTest.java
@@ -0,0 +1,89 @@
+package edu.uci.ics.hyracks.tests.am.invertedindex;
+
+import java.io.File;
+
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.ShortSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.IntegerParserFactory;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
+import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow.BinaryTokenizerOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.DelimitedUTF8StringBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.ITokenFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.UTF8WordTokenFactory;
+import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+
+public class BinaryTokenizerOperatorTest extends AbstractIntegrationTest {
+
+    @Test
+    public void tokenizerTest() throws Exception {
+        test(false);
+    }
+
+    @Test
+    public void tokenizerWithNumTokensTest() throws Exception {
+        test(true);
+    }
+
+    private void test(boolean addNumTokensKey) throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        FileSplit[] dblpTitleFileSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
+                "data/cleanednumbereddblptitles.txt"))) };
+        IFileSplitProvider dblpTitleSplitProvider = new ConstantFileSplitProvider(dblpTitleFileSplits);
+        RecordDescriptor dblpTitleRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+                IntegerSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
+
+        FileScanOperatorDescriptor dblpTitleScanner = new FileScanOperatorDescriptor(spec, dblpTitleSplitProvider,
+                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { IntegerParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE }, '|'), dblpTitleRecDesc);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, dblpTitleScanner, NC1_ID);
+
+        RecordDescriptor tokenizerRecDesc;
+        if (!addNumTokensKey) {
+            tokenizerRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+                    UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE });
+        } else {
+            tokenizerRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+                    UTF8StringSerializerDeserializer.INSTANCE, ShortSerializerDeserializer.INSTANCE,
+                    IntegerSerializerDeserializer.INSTANCE });
+        }
+
+        ITokenFactory tokenFactory = new UTF8WordTokenFactory();
+        IBinaryTokenizerFactory tokenizerFactory = new DelimitedUTF8StringBinaryTokenizerFactory(true, false,
+                tokenFactory);
+        int[] keyFields = { 0 };
+        BinaryTokenizerOperatorDescriptor binaryTokenizer = new BinaryTokenizerOperatorDescriptor(spec,
+                tokenizerRecDesc, tokenizerFactory, 1, keyFields, addNumTokensKey);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, binaryTokenizer, NC1_ID);
+
+        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                createTempFile().getAbsolutePath()) });
+        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), dblpTitleScanner, 0, binaryTokenizer, 0);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), binaryTokenizer, 0, printer, 0);
+
+        spec.addRoot(printer);
+        runTest(spec);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/PartitionedWordInvertedIndexTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/PartitionedWordInvertedIndexTest.java
new file mode 100644
index 0000000..62d4362
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/PartitionedWordInvertedIndexTest.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.invertedindex;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
+import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
+import edu.uci.ics.hyracks.data.std.primitive.ShortPointable;
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.ShortSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ConstantMergePolicyProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.SynchronousSchedulerProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ThreadCountingOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow.PartitionedLSMInvertedIndexDataflowHelperFactory;
+
+public class PartitionedWordInvertedIndexTest extends AbstractfWordInvertedIndexTest {
+
+    @Override
+    protected void prepare() {
+        // Field declarations and comparators for tokens.
+        tokenTypeTraits = new ITypeTraits[] { UTF8StringPointable.TYPE_TRAITS, ShortPointable.TYPE_TRAITS };
+        tokenComparatorFactories = new IBinaryComparatorFactory[] {
+                PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
+                PointableBinaryComparatorFactory.of(ShortPointable.FACTORY) };
+
+        tokenizerRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, ShortSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE });
+
+        sortComparatorFactories = new IBinaryComparatorFactory[] {
+                PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
+                PointableBinaryComparatorFactory.of(ShortPointable.FACTORY),
+                PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY) };
+
+        invertedIndexDataflowHelperFactory = new PartitionedLSMInvertedIndexDataflowHelperFactory(
+                new ConstantMergePolicyProvider(MERGE_THRESHOLD), ThreadCountingOperationTrackerFactory.INSTANCE,
+                SynchronousSchedulerProvider.INSTANCE, NoOpIOOperationCallback.INSTANCE, DEFAULT_MEM_PAGE_SIZE,
+                DEFAULT_MEM_NUM_PAGES);
+    }
+
+    @Override
+    protected boolean addNumTokensKey() {
+        return true;
+    }
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/WordInvertedIndexTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/WordInvertedIndexTest.java
new file mode 100644
index 0000000..c35c6c9
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/WordInvertedIndexTest.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.invertedindex;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
+import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ConstantMergePolicyProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.SynchronousSchedulerProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ThreadCountingOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow.LSMInvertedIndexDataflowHelperFactory;
+
+public class WordInvertedIndexTest extends AbstractfWordInvertedIndexTest {
+
+    @Override
+    protected void prepare() {
+        // Field declarations and comparators for tokens.
+        tokenTypeTraits = new ITypeTraits[] { UTF8StringPointable.TYPE_TRAITS };
+        tokenComparatorFactories = new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
+                .of(UTF8StringPointable.FACTORY) };
+
+        tokenizerRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE });
+
+        sortComparatorFactories = new IBinaryComparatorFactory[] {
+                PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
+                PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY) };
+
+        invertedIndexDataflowHelperFactory = new LSMInvertedIndexDataflowHelperFactory(new ConstantMergePolicyProvider(
+                MERGE_THRESHOLD), ThreadCountingOperationTrackerFactory.INSTANCE,
+                SynchronousSchedulerProvider.INSTANCE, NoOpIOOperationCallback.INSTANCE, DEFAULT_MEM_PAGE_SIZE, DEFAULT_MEM_NUM_PAGES);
+    }
+
+    @Override
+    protected boolean addNumTokensKey() {
+        return false;
+    }
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreeOperatorTestHelper.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreeOperatorTestHelper.java
new file mode 100644
index 0000000..912ab0e
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreeOperatorTestHelper.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.lsm.btree;
+
+import edu.uci.ics.hyracks.control.nc.io.IOManager;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.dataflow.LSMBTreeDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ConstantMergePolicyProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.SynchronousSchedulerProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ThreadCountingOperationTrackerFactory;
+import edu.uci.ics.hyracks.tests.am.common.LSMTreeOperatorTestHelper;
+
+public class LSMBTreeOperatorTestHelper extends LSMTreeOperatorTestHelper {
+
+    private static final int MERGE_THRESHOLD = 3;
+
+    public LSMBTreeOperatorTestHelper(IOManager ioManager) {
+        super(ioManager);
+    }
+
+    public IIndexDataflowHelperFactory createDataFlowHelperFactory() {
+        return new LSMBTreeDataflowHelperFactory(new ConstantMergePolicyProvider(MERGE_THRESHOLD),
+                ThreadCountingOperationTrackerFactory.INSTANCE, SynchronousSchedulerProvider.INSTANCE,
+                NoOpIOOperationCallback.INSTANCE, DEFAULT_MEM_PAGE_SIZE, DEFAULT_MEM_NUM_PAGES);
+    }
+
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreePrimaryIndexScanOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreePrimaryIndexScanOperatorTest.java
new file mode 100644
index 0000000..d751399
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreePrimaryIndexScanOperatorTest.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.lsm.btree;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.tests.am.btree.BTreePrimaryIndexScanOperatorTest;
+import edu.uci.ics.hyracks.tests.am.common.ITreeIndexOperatorTestHelper;
+
+public class LSMBTreePrimaryIndexScanOperatorTest extends BTreePrimaryIndexScanOperatorTest {
+
+    protected ITreeIndexOperatorTestHelper createTestHelper() throws HyracksException {
+        return new LSMBTreeOperatorTestHelper(TestStorageManagerComponentHolder.getIOManager());
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory() {
+        return ((LSMBTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory();
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreePrimaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreePrimaryIndexSearchOperatorTest.java
new file mode 100644
index 0000000..bdcf3f6
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreePrimaryIndexSearchOperatorTest.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.lsm.btree;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.tests.am.btree.BTreePrimaryIndexSearchOperatorTest;
+import edu.uci.ics.hyracks.tests.am.common.ITreeIndexOperatorTestHelper;
+
+public class LSMBTreePrimaryIndexSearchOperatorTest extends BTreePrimaryIndexSearchOperatorTest {
+    protected ITreeIndexOperatorTestHelper createTestHelper() throws HyracksException {
+        return new LSMBTreeOperatorTestHelper(TestStorageManagerComponentHolder.getIOManager());
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory() {
+        return ((LSMBTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory();
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreeSecondaryIndexInsertOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreeSecondaryIndexInsertOperatorTest.java
new file mode 100644
index 0000000..5ba7279
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreeSecondaryIndexInsertOperatorTest.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.lsm.btree;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.tests.am.btree.BTreeSecondaryIndexInsertOperatorTest;
+import edu.uci.ics.hyracks.tests.am.common.ITreeIndexOperatorTestHelper;
+
+public class LSMBTreeSecondaryIndexInsertOperatorTest extends BTreeSecondaryIndexInsertOperatorTest {
+    protected ITreeIndexOperatorTestHelper createTestHelper() throws HyracksException {
+        return new LSMBTreeOperatorTestHelper(TestStorageManagerComponentHolder.getIOManager());
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory() {
+        return ((LSMBTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory();
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreeSecondaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreeSecondaryIndexSearchOperatorTest.java
new file mode 100644
index 0000000..c1b1cd8
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/btree/LSMBTreeSecondaryIndexSearchOperatorTest.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.lsm.btree;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.tests.am.btree.BTreeSecondaryIndexSearchOperatorTest;
+import edu.uci.ics.hyracks.tests.am.common.ITreeIndexOperatorTestHelper;
+
+public class LSMBTreeSecondaryIndexSearchOperatorTest extends BTreeSecondaryIndexSearchOperatorTest {
+    protected ITreeIndexOperatorTestHelper createTestHelper() throws HyracksException {
+        return new LSMBTreeOperatorTestHelper(TestStorageManagerComponentHolder.getIOManager());
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory() {
+        return ((LSMBTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory();
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeOperatorTestHelper.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeOperatorTestHelper.java
new file mode 100644
index 0000000..84b34b7
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeOperatorTestHelper.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.lsm.rtree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.control.nc.io.IOManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ConstantMergePolicyProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.SynchronousSchedulerProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ThreadCountingOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.dataflow.LSMRTreeDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.tests.am.common.LSMTreeOperatorTestHelper;
+
+public class LSMRTreeOperatorTestHelper extends LSMTreeOperatorTestHelper {
+
+    private static final int MERGE_THRESHOLD = 3;
+
+    public LSMRTreeOperatorTestHelper(IOManager ioManager) {
+        super(ioManager);
+    }
+
+    public IIndexDataflowHelperFactory createDataFlowHelperFactory(
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            IBinaryComparatorFactory[] btreeComparatorFactories, ILinearizeComparatorFactory linearizerCmpFactory) {
+        return new LSMRTreeDataflowHelperFactory(valueProviderFactories, rtreePolicyType, btreeComparatorFactories,
+                new ConstantMergePolicyProvider(MERGE_THRESHOLD), ThreadCountingOperationTrackerFactory.INSTANCE,
+                SynchronousSchedulerProvider.INSTANCE, NoOpIOOperationCallback.INSTANCE, linearizerCmpFactory,
+                DEFAULT_MEM_PAGE_SIZE, DEFAULT_MEM_NUM_PAGES);
+    }
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeSecondaryIndexInsertOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeSecondaryIndexInsertOperatorTest.java
new file mode 100644
index 0000000..99eb6c3
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeSecondaryIndexInsertOperatorTest.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.lsm.rtree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.tests.am.common.ITreeIndexOperatorTestHelper;
+import edu.uci.ics.hyracks.tests.am.rtree.RTreeSecondaryIndexInsertOperatorTest;
+
+public class LSMRTreeSecondaryIndexInsertOperatorTest extends RTreeSecondaryIndexInsertOperatorTest {
+    protected ITreeIndexOperatorTestHelper createTestHelper() throws HyracksException {
+        return new LSMRTreeOperatorTestHelper(TestStorageManagerComponentHolder.getIOManager());
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory(
+            IPrimitiveValueProviderFactory[] secondaryValueProviderFactories, RTreePolicyType rtreePolicyType,
+            IBinaryComparatorFactory[] btreeComparatorFactories, ILinearizeComparatorFactory linearizerCmpFactory) {
+        return ((LSMRTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory(secondaryValueProviderFactories,
+                rtreePolicyType, btreeComparatorFactories, linearizerCmpFactory);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeSecondaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeSecondaryIndexSearchOperatorTest.java
new file mode 100644
index 0000000..e1e6b04
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeSecondaryIndexSearchOperatorTest.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.lsm.rtree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.tests.am.common.ITreeIndexOperatorTestHelper;
+import edu.uci.ics.hyracks.tests.am.rtree.RTreeSecondaryIndexSearchOperatorTest;
+
+public class LSMRTreeSecondaryIndexSearchOperatorTest extends RTreeSecondaryIndexSearchOperatorTest {
+    protected ITreeIndexOperatorTestHelper createTestHelper() throws HyracksException {
+        return new LSMRTreeOperatorTestHelper(TestStorageManagerComponentHolder.getIOManager());
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory(
+            IPrimitiveValueProviderFactory[] secondaryValueProviderFactories, RTreePolicyType rtreePolicyType,
+            IBinaryComparatorFactory[] btreeComparatorFactories, ILinearizeComparatorFactory linearizerCmpFactory) {
+        return ((LSMRTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory(secondaryValueProviderFactories,
+                rtreePolicyType, btreeComparatorFactories, linearizerCmpFactory);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesOperatorTestHelper.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesOperatorTestHelper.java
new file mode 100644
index 0000000..bb31dcd
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesOperatorTestHelper.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.lsm.rtree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.control.nc.io.IOManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ConstantMergePolicyProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.SynchronousSchedulerProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ThreadCountingOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.dataflow.LSMRTreeWithAntiMatterTuplesDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.tests.am.common.LSMTreeOperatorTestHelper;
+
+public class LSMRTreeWithAntiMatterTuplesOperatorTestHelper extends LSMTreeOperatorTestHelper {
+
+    private static final int MERGE_THRESHOLD = 3;
+
+    public LSMRTreeWithAntiMatterTuplesOperatorTestHelper(IOManager ioManager) {
+        super(ioManager);
+    }
+
+    public IIndexDataflowHelperFactory createDataFlowHelperFactory(
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            IBinaryComparatorFactory[] btreeComparatorFactories, ILinearizeComparatorFactory linearizerCmpFactory) {
+        return new LSMRTreeWithAntiMatterTuplesDataflowHelperFactory(valueProviderFactories, rtreePolicyType,
+                btreeComparatorFactories, new ConstantMergePolicyProvider(MERGE_THRESHOLD),
+                ThreadCountingOperationTrackerFactory.INSTANCE, SynchronousSchedulerProvider.INSTANCE,
+                NoOpIOOperationCallback.INSTANCE, linearizerCmpFactory);
+    }
+
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesSecondaryIndexInsertOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesSecondaryIndexInsertOperatorTest.java
new file mode 100644
index 0000000..bbf4dd3
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesSecondaryIndexInsertOperatorTest.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.lsm.rtree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.tests.am.common.ITreeIndexOperatorTestHelper;
+import edu.uci.ics.hyracks.tests.am.rtree.RTreeSecondaryIndexInsertOperatorTest;
+
+public class LSMRTreeWithAntiMatterTuplesSecondaryIndexInsertOperatorTest extends RTreeSecondaryIndexInsertOperatorTest {
+    protected ITreeIndexOperatorTestHelper createTestHelper() throws HyracksException {
+        return new LSMRTreeWithAntiMatterTuplesOperatorTestHelper(TestStorageManagerComponentHolder.getIOManager());
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory(
+            IPrimitiveValueProviderFactory[] secondaryValueProviderFactories, RTreePolicyType rtreePolicyType,
+            IBinaryComparatorFactory[] btreeComparatorFactories, ILinearizeComparatorFactory linearizerCmpFactory) {
+        return ((LSMRTreeWithAntiMatterTuplesOperatorTestHelper) testHelper).createDataFlowHelperFactory(
+                secondaryValueProviderFactories, rtreePolicyType, btreeComparatorFactories, linearizerCmpFactory);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesSecondaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesSecondaryIndexSearchOperatorTest.java
new file mode 100644
index 0000000..b615636
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesSecondaryIndexSearchOperatorTest.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.lsm.rtree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.tests.am.common.ITreeIndexOperatorTestHelper;
+import edu.uci.ics.hyracks.tests.am.rtree.RTreeSecondaryIndexSearchOperatorTest;
+
+public class LSMRTreeWithAntiMatterTuplesSecondaryIndexSearchOperatorTest extends RTreeSecondaryIndexSearchOperatorTest {
+    protected ITreeIndexOperatorTestHelper createTestHelper() throws HyracksException {
+        return new LSMRTreeWithAntiMatterTuplesOperatorTestHelper(TestStorageManagerComponentHolder.getIOManager());
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory(
+            IPrimitiveValueProviderFactory[] secondaryValueProviderFactories, RTreePolicyType rtreePolicyType,
+            IBinaryComparatorFactory[] btreeComparatorFactories, ILinearizeComparatorFactory linearizerCmpFactory) {
+        return ((LSMRTreeWithAntiMatterTuplesOperatorTestHelper) testHelper).createDataFlowHelperFactory(
+                secondaryValueProviderFactories, rtreePolicyType, btreeComparatorFactories, linearizerCmpFactory);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/AbstractRTreeOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/AbstractRTreeOperatorTest.java
new file mode 100644
index 0000000..c4a63df
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/AbstractRTreeOperatorTest.java
@@ -0,0 +1,369 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.rtree;
+
+import java.io.DataOutput;
+import java.io.File;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
+import edu.uci.ics.hyracks.data.std.primitive.DoublePointable;
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.DoubleParserFactory;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
+import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.misc.NullSinkOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDropOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexInsertUpdateDeleteOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.utils.LSMRTreeUtils;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
+import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.TransientLocalResourceFactoryProvider;
+import edu.uci.ics.hyracks.test.support.TestIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
+import edu.uci.ics.hyracks.tests.am.common.ITreeIndexOperatorTestHelper;
+import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+
+public abstract class AbstractRTreeOperatorTest extends AbstractIntegrationTest {
+    static {
+        TestStorageManagerComponentHolder.init(8192, 20, 20);
+    }
+
+    protected final IStorageManagerInterface storageManager = new TestStorageManagerInterface();
+    protected final IIndexLifecycleManagerProvider lcManagerProvider = new TestIndexLifecycleManagerProvider();
+    protected IIndexDataflowHelperFactory rtreeDataflowHelperFactory;
+    protected IIndexDataflowHelperFactory btreeDataflowHelperFactory = new BTreeDataflowHelperFactory();
+
+    // field, type and key declarations for primary index
+    protected final int primaryFieldCount = 10;
+    protected final ITypeTraits[] primaryTypeTraits = new ITypeTraits[primaryFieldCount];
+    protected final int primaryKeyFieldCount = 1;
+    protected final IBinaryComparatorFactory[] primaryComparatorFactories = new IBinaryComparatorFactory[primaryKeyFieldCount];
+
+    protected final RecordDescriptor primaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+            DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+            DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE });
+
+    // to be set by subclasses
+    protected String primaryFileName;
+    protected IFileSplitProvider primarySplitProvider;
+
+    // field, type and key declarations for secondary indexes
+    protected final int secondaryFieldCount = 5;
+    protected final ITypeTraits[] secondaryTypeTraits = new ITypeTraits[secondaryFieldCount];
+    protected final int secondaryKeyFieldCount = 4;
+    protected final IBinaryComparatorFactory[] secondaryComparatorFactories = new IBinaryComparatorFactory[secondaryKeyFieldCount];
+
+    protected final RecordDescriptor secondaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+            DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+            DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+            UTF8StringSerializerDeserializer.INSTANCE });
+
+    // This is only used for the LSMRTree. We need a comparator Factories for
+    // the BTree component of the LSMRTree.
+    protected final int btreeKeyFieldCount = 5;
+    protected final IBinaryComparatorFactory[] btreeComparatorFactories = new IBinaryComparatorFactory[btreeKeyFieldCount];
+
+    protected String secondaryFileName;
+    protected IFileSplitProvider secondarySplitProvider;
+
+    protected ITreeIndexOperatorTestHelper testHelper;
+
+    protected ITreeIndexOperatorTestHelper createTestHelper() throws HyracksException {
+        return new RTreeOperatorTestHelper();
+    }
+
+    @Before
+    public void setup() throws Exception {
+        testHelper = createTestHelper();
+
+        primaryFileName = testHelper.getPrimaryIndexName();
+        primarySplitProvider = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID, new FileReference(
+                new File(primaryFileName))) });
+        secondaryFileName = testHelper.getSecondaryIndexName();
+        secondarySplitProvider = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                new FileReference(new File(secondaryFileName))) });
+
+        // field, type and key declarations for primary index
+        primaryTypeTraits[0] = UTF8StringPointable.TYPE_TRAITS;
+        primaryTypeTraits[1] = UTF8StringPointable.TYPE_TRAITS;
+        primaryTypeTraits[2] = UTF8StringPointable.TYPE_TRAITS;
+        primaryTypeTraits[3] = UTF8StringPointable.TYPE_TRAITS;
+        primaryTypeTraits[4] = UTF8StringPointable.TYPE_TRAITS;
+        primaryTypeTraits[5] = UTF8StringPointable.TYPE_TRAITS;
+        primaryTypeTraits[6] = UTF8StringPointable.TYPE_TRAITS;
+        primaryTypeTraits[7] = UTF8StringPointable.TYPE_TRAITS;
+        primaryTypeTraits[8] = UTF8StringPointable.TYPE_TRAITS;
+        primaryTypeTraits[9] = UTF8StringPointable.TYPE_TRAITS;
+        primaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
+
+        // field, type and key declarations for secondary indexes
+        secondaryTypeTraits[0] = DoublePointable.TYPE_TRAITS;
+        secondaryTypeTraits[1] = DoublePointable.TYPE_TRAITS;
+        secondaryTypeTraits[2] = DoublePointable.TYPE_TRAITS;
+        secondaryTypeTraits[3] = DoublePointable.TYPE_TRAITS;
+        secondaryTypeTraits[4] = UTF8StringPointable.TYPE_TRAITS;
+        secondaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(DoublePointable.FACTORY);
+        secondaryComparatorFactories[1] = PointableBinaryComparatorFactory.of(DoublePointable.FACTORY);
+        secondaryComparatorFactories[2] = PointableBinaryComparatorFactory.of(DoublePointable.FACTORY);
+        secondaryComparatorFactories[3] = PointableBinaryComparatorFactory.of(DoublePointable.FACTORY);
+
+        // This only used for LSMRTree
+        btreeComparatorFactories[0] = PointableBinaryComparatorFactory.of(DoublePointable.FACTORY);
+        btreeComparatorFactories[1] = PointableBinaryComparatorFactory.of(DoublePointable.FACTORY);
+        btreeComparatorFactories[2] = PointableBinaryComparatorFactory.of(DoublePointable.FACTORY);
+        btreeComparatorFactories[3] = PointableBinaryComparatorFactory.of(DoublePointable.FACTORY);
+        btreeComparatorFactories[4] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
+
+        IPrimitiveValueProviderFactory[] secondaryValueProviderFactories = RTreeUtils
+                .createPrimitiveValueProviderFactories(secondaryComparatorFactories.length, DoublePointable.FACTORY);
+
+        rtreeDataflowHelperFactory = createDataFlowHelperFactory(secondaryValueProviderFactories,
+                RTreePolicyType.RSTARTREE, btreeComparatorFactories,
+                LSMRTreeUtils.proposeBestLinearizer(secondaryTypeTraits, secondaryComparatorFactories.length));
+
+    }
+
+    protected abstract IIndexDataflowHelperFactory createDataFlowHelperFactory(
+            IPrimitiveValueProviderFactory[] secondaryValueProviderFactories, RTreePolicyType rtreePolicyType,
+            IBinaryComparatorFactory[] btreeComparatorFactories, ILinearizeComparatorFactory linearizerCmpFactory)
+            throws TreeIndexException;
+
+    protected void createPrimaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+        TransientLocalResourceFactoryProvider localResourceFactoryProvider = new TransientLocalResourceFactoryProvider();
+        TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
+                lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories, null,
+                btreeDataflowHelperFactory, localResourceFactoryProvider, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
+        spec.addRoot(primaryCreateOp);
+        runTest(spec);
+    }
+
+    protected void loadPrimaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        FileSplit[] ordersSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
+                "data/orders-with-locations-part1.txt"))) };
+        IFileSplitProvider ordersSplitProvider = new ConstantFileSplitProvider(ordersSplits);
+        RecordDescriptor ordersDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE });
+
+        FileScanOperatorDescriptor ordScanner = new FileScanOperatorDescriptor(spec, ordersSplitProvider,
+                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+                        DoubleParserFactory.INSTANCE, DoubleParserFactory.INSTANCE, DoubleParserFactory.INSTANCE,
+                        DoubleParserFactory.INSTANCE }, '|'), ordersDesc);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, ordScanner, NC1_ID);
+
+        ExternalSortOperatorDescriptor sorter = new ExternalSortOperatorDescriptor(spec, 1000, new int[] { 0 },
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                ordersDesc);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID);
+
+        int[] fieldPermutation = { 0, 1, 2, 4, 5, 7, 9, 10, 11, 12 };
+        TreeIndexBulkLoadOperatorDescriptor primaryBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
+                storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                null, fieldPermutation, 0.7f, false, 1000L, btreeDataflowHelperFactory,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBulkLoad, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), sorter, 0, primaryBulkLoad, 0);
+
+        spec.addRoot(primaryBulkLoad);
+        runTest(spec);
+    }
+
+    protected void createSecondaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+        TransientLocalResourceFactoryProvider localResourceFactoryProvider = new TransientLocalResourceFactoryProvider();
+        TreeIndexCreateOperatorDescriptor secondaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec,
+                storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, null, rtreeDataflowHelperFactory, localResourceFactoryProvider,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryCreateOp, NC1_ID);
+        spec.addRoot(secondaryCreateOp);
+        runTest(spec);
+    }
+
+    protected void loadSecondaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        // build dummy tuple containing nothing
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(primaryKeyFieldCount * 2);
+        DataOutput dos = tb.getDataOutput();
+
+        tb.reset();
+        UTF8StringSerializerDeserializer.INSTANCE.serialize("0", dos);
+        tb.addFieldEndOffset();
+
+        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE };
+        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
+
+        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
+                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
+
+        int[] lowKeyFields = null; // - infinity
+        int[] highKeyFields = null; // + infinity
+
+        // scan primary index
+        BTreeSearchOperatorDescriptor primarySearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
+                storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                null, lowKeyFields, highKeyFields, true, true, btreeDataflowHelperFactory, false,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primarySearchOp, NC1_ID);
+
+        // load secondary index
+        int[] fieldPermutation = { 6, 7, 8, 9, 0 };
+        TreeIndexBulkLoadOperatorDescriptor secondaryBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
+                storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, null, fieldPermutation, 0.7f, false, 1000L, rtreeDataflowHelperFactory,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBulkLoad, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primarySearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), primarySearchOp, 0, secondaryBulkLoad, 0);
+
+        spec.addRoot(secondaryBulkLoad);
+        runTest(spec);
+    }
+
+    protected void insertPipeline() throws Exception {
+
+        JobSpecification spec = new JobSpecification();
+
+        FileSplit[] ordersSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
+                "data/orders-with-locations-part2.txt"))) };
+        IFileSplitProvider ordersSplitProvider = new ConstantFileSplitProvider(ordersSplits);
+        RecordDescriptor ordersDesc = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE });
+
+        FileScanOperatorDescriptor ordScanner = new FileScanOperatorDescriptor(spec, ordersSplitProvider,
+                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+                        DoubleParserFactory.INSTANCE, DoubleParserFactory.INSTANCE, DoubleParserFactory.INSTANCE,
+                        DoubleParserFactory.INSTANCE }, '|'), ordersDesc);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, ordScanner, NC1_ID);
+
+        // insert into primary index
+        int[] primaryFieldPermutation = { 0, 1, 2, 4, 5, 7, 9, 10, 11, 12 };
+        TreeIndexInsertUpdateDeleteOperatorDescriptor primaryInsertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
+                spec, ordersDesc, storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, null, primaryFieldPermutation, IndexOperation.INSERT,
+                btreeDataflowHelperFactory, null, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryInsertOp, NC1_ID);
+
+        // secondary index
+        int[] secondaryFieldPermutation = { 9, 10, 11, 12, 0 };
+        TreeIndexInsertUpdateDeleteOperatorDescriptor secondaryInsertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
+                spec, ordersDesc, storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, null, secondaryFieldPermutation, IndexOperation.INSERT,
+                rtreeDataflowHelperFactory, null, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryInsertOp, NC1_ID);
+
+        NullSinkOperatorDescriptor nullSink = new NullSinkOperatorDescriptor(spec);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, nullSink, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, primaryInsertOp, 0);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), primaryInsertOp, 0, secondaryInsertOp, 0);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), secondaryInsertOp, 0, nullSink, 0);
+
+        spec.addRoot(nullSink);
+        runTest(spec);
+    }
+
+    protected void destroyPrimaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+        IndexDropOperatorDescriptor primaryDropOp = new IndexDropOperatorDescriptor(spec, storageManager,
+                lcManagerProvider, primarySplitProvider, btreeDataflowHelperFactory);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryDropOp, NC1_ID);
+        spec.addRoot(primaryDropOp);
+        runTest(spec);
+    }
+
+    protected void destroySecondaryIndex() throws Exception {
+        JobSpecification spec = new JobSpecification();
+        IndexDropOperatorDescriptor secondaryDropOp = new IndexDropOperatorDescriptor(spec, storageManager,
+                lcManagerProvider, secondarySplitProvider, rtreeDataflowHelperFactory);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryDropOp, NC1_ID);
+        spec.addRoot(secondaryDropOp);
+        runTest(spec);
+    }
+
+    @After
+    public abstract void cleanup() throws Exception;
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeOperatorTestHelper.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeOperatorTestHelper.java
new file mode 100644
index 0000000..85abcb1
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeOperatorTestHelper.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.rtree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.dataflow.RTreeDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.tests.am.common.TreeOperatorTestHelper;
+
+public class RTreeOperatorTestHelper extends TreeOperatorTestHelper {
+
+    public IIndexDataflowHelperFactory createDataFlowHelperFactory(
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            IBinaryComparatorFactory[] btreeComparatorFactories) {
+        return new RTreeDataflowHelperFactory(valueProviderFactories, rtreePolicyType);
+    }
+
+}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexInsertOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexInsertOperatorTest.java
new file mode 100644
index 0000000..8e68bcf
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexInsertOperatorTest.java
@@ -0,0 +1,132 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.rtree;
+
+import java.io.DataOutput;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.dataflow.RTreeSearchOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+public class RTreeSecondaryIndexInsertOperatorTest extends AbstractRTreeOperatorTest {
+
+    @Before
+    public void setup() throws Exception {
+        super.setup();
+        createPrimaryIndex();
+        loadPrimaryIndex();
+        createSecondaryIndex();
+        loadSecondaryIndex();
+        insertPipeline();
+    }
+
+    @Test
+    public void searchUpdatedSecondaryIndexTest() throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        // build tuple
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(secondaryKeyFieldCount);
+        DataOutput dos = tb.getDataOutput();
+
+        tb.reset();
+        DoubleSerializerDeserializer.INSTANCE.serialize(61.2894, dos);
+        tb.addFieldEndOffset();
+        DoubleSerializerDeserializer.INSTANCE.serialize(-149.624, dos);
+        tb.addFieldEndOffset();
+        DoubleSerializerDeserializer.INSTANCE.serialize(61.8894, dos);
+        tb.addFieldEndOffset();
+        DoubleSerializerDeserializer.INSTANCE.serialize(-149.024, dos);
+        tb.addFieldEndOffset();
+
+        ISerializerDeserializer[] keyRecDescSers = { DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE };
+        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
+
+        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
+                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
+
+        int[] keyFields = { 0, 1, 2, 3 };
+
+        RTreeSearchOperatorDescriptor secondarySearchOp = new RTreeSearchOperatorDescriptor(spec, secondaryRecDesc,
+                storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, keyFields, rtreeDataflowHelperFactory, false,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondarySearchOp, NC1_ID);
+
+        // fifth field from the tuples coming from secondary index
+        int[] primaryLowKeyFields = { 4 };
+        // fifth field from the tuples coming from secondary index
+        int[] primaryHighKeyFields = { 4 };
+
+        // search primary index
+        BTreeSearchOperatorDescriptor primarySearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
+                storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                null, primaryLowKeyFields, primaryHighKeyFields, true, true, btreeDataflowHelperFactory, false,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primarySearchOp, NC1_ID);
+
+        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                createTempFile().getAbsolutePath()) });
+        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, secondarySearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), secondarySearchOp, 0, primarySearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), primarySearchOp, 0, printer, 0);
+
+        spec.addRoot(printer);
+        runTest(spec);
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory(
+            IPrimitiveValueProviderFactory[] secondaryValueProviderFactories, RTreePolicyType rtreePolicyType,
+            IBinaryComparatorFactory[] btreeComparatorFactories, ILinearizeComparatorFactory linearizerCmpFactory)
+            throws TreeIndexException {
+        return ((RTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory(secondaryValueProviderFactories,
+                rtreePolicyType, null);
+    }
+
+    @Override
+    public void cleanup() throws Exception {
+        destroyPrimaryIndex();
+        destroySecondaryIndex();
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexScanOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexScanOperatorTest.java
new file mode 100644
index 0000000..90bb918
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexScanOperatorTest.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.rtree;
+
+import java.io.DataOutput;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.dataflow.RTreeSearchOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+public class RTreeSecondaryIndexScanOperatorTest extends AbstractRTreeOperatorTest {
+
+    @Before
+    public void setup() throws Exception {
+        super.setup();
+        createPrimaryIndex();
+        loadPrimaryIndex();
+        createSecondaryIndex();
+        loadSecondaryIndex();
+    }
+
+    @Test
+    public void scanPrimaryIndexTest() throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        // build dummy tuple
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(secondaryKeyFieldCount);
+        DataOutput dos = tb.getDataOutput();
+
+        tb.reset();
+        DoubleSerializerDeserializer.INSTANCE.serialize(0.0, dos);
+        tb.addFieldEndOffset();
+        DoubleSerializerDeserializer.INSTANCE.serialize(0.0, dos);
+        tb.addFieldEndOffset();
+        DoubleSerializerDeserializer.INSTANCE.serialize(0.0, dos);
+        tb.addFieldEndOffset();
+        DoubleSerializerDeserializer.INSTANCE.serialize(0.0, dos);
+        tb.addFieldEndOffset();
+
+        ISerializerDeserializer[] keyRecDescSers = { DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE };
+        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
+
+        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
+                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
+
+        int[] keyFields = null;
+
+        RTreeSearchOperatorDescriptor secondarySearchOp = new RTreeSearchOperatorDescriptor(spec, secondaryRecDesc,
+                storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, keyFields, rtreeDataflowHelperFactory, false,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondarySearchOp, NC1_ID);
+
+        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                createTempFile().getAbsolutePath()) });
+        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, secondarySearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), secondarySearchOp, 0, printer, 0);
+
+        spec.addRoot(printer);
+        runTest(spec);
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory(
+            IPrimitiveValueProviderFactory[] secondaryValueProviderFactories, RTreePolicyType rtreePolicyType,
+            IBinaryComparatorFactory[] btreeComparatorFactories, ILinearizeComparatorFactory linearizerCmpFactory) {
+        return ((RTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory(secondaryValueProviderFactories,
+                rtreePolicyType, null);
+    }
+    
+    @Override
+    public void cleanup() throws Exception {
+        destroyPrimaryIndex();
+        destroySecondaryIndex();
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexSearchOperatorTest.java
new file mode 100644
index 0000000..5da122c
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexSearchOperatorTest.java
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.rtree;
+
+import java.io.DataOutput;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.dataflow.RTreeSearchOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+public class RTreeSecondaryIndexSearchOperatorTest extends AbstractRTreeOperatorTest {
+
+    @Before
+    public void setup() throws Exception {
+        super.setup();
+        createPrimaryIndex();
+        loadPrimaryIndex();
+        createSecondaryIndex();
+        loadSecondaryIndex();
+    }
+
+    @Test
+    public void searchSecondaryIndexTest() throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        // build tuple
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(secondaryKeyFieldCount);
+        DataOutput dos = tb.getDataOutput();
+
+        tb.reset();
+        DoubleSerializerDeserializer.INSTANCE.serialize(61.2894, dos);
+        tb.addFieldEndOffset();
+        DoubleSerializerDeserializer.INSTANCE.serialize(-149.624, dos);
+        tb.addFieldEndOffset();
+        DoubleSerializerDeserializer.INSTANCE.serialize(61.8894, dos);
+        tb.addFieldEndOffset();
+        DoubleSerializerDeserializer.INSTANCE.serialize(-149.024, dos);
+        tb.addFieldEndOffset();
+
+        ISerializerDeserializer[] keyRecDescSers = { DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE };
+        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
+
+        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
+                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
+
+        int[] keyFields = { 0, 1, 2, 3 };
+
+        RTreeSearchOperatorDescriptor secondarySearchOp = new RTreeSearchOperatorDescriptor(spec, secondaryRecDesc,
+                storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, keyFields, rtreeDataflowHelperFactory, false,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondarySearchOp, NC1_ID);
+
+        // fifth field from the tuples coming from secondary index
+        int[] primaryLowKeyFields = { 4 };
+        // fifth field from the tuples coming from secondary index
+        int[] primaryHighKeyFields = { 4 };
+
+        // search primary index
+        BTreeSearchOperatorDescriptor primarySearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
+                storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                null, primaryLowKeyFields, primaryHighKeyFields, true, true, btreeDataflowHelperFactory, false,
+                NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primarySearchOp, NC1_ID);
+
+        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                createTempFile().getAbsolutePath()) });
+        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, secondarySearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), secondarySearchOp, 0, primarySearchOp, 0);
+        spec.connect(new OneToOneConnectorDescriptor(spec), primarySearchOp, 0, printer, 0);
+
+        spec.addRoot(printer);
+        runTest(spec);
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory(
+            IPrimitiveValueProviderFactory[] secondaryValueProviderFactories, RTreePolicyType rtreePolicyType,
+            IBinaryComparatorFactory[] btreeComparatorFactories, ILinearizeComparatorFactory linearizerCmpFactory)
+            throws TreeIndexException {
+        return ((RTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory(secondaryValueProviderFactories,
+                rtreePolicyType, null);
+    }
+
+    @Override
+    public void cleanup() throws Exception {
+        destroyPrimaryIndex();
+        destroySecondaryIndex();
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexStatsOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexStatsOperatorTest.java
new file mode 100644
index 0000000..83be1d9
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexStatsOperatorTest.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.tests.am.rtree;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexStatsOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+public class RTreeSecondaryIndexStatsOperatorTest extends AbstractRTreeOperatorTest {
+
+    @Before
+    public void setup() throws Exception {
+        super.setup();
+        createPrimaryIndex();
+        loadPrimaryIndex();
+        createSecondaryIndex();
+        loadSecondaryIndex();
+    }
+
+    @Test
+    public void showPrimaryIndexStats() throws Exception {
+        JobSpecification spec = new JobSpecification();
+
+        TreeIndexStatsOperatorDescriptor secondaryStatsOp = new TreeIndexStatsOperatorDescriptor(spec, storageManager,
+                lcManagerProvider, secondarySplitProvider, secondaryTypeTraits, secondaryComparatorFactories, null,
+                rtreeDataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryStatsOp, NC1_ID);
+        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
+                createTempFile().getAbsolutePath()) });
+        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
+
+        spec.connect(new OneToOneConnectorDescriptor(spec), secondaryStatsOp, 0, printer, 0);
+        spec.addRoot(printer);
+        runTest(spec);
+    }
+
+    @Override
+    protected IIndexDataflowHelperFactory createDataFlowHelperFactory(
+            IPrimitiveValueProviderFactory[] secondaryValueProviderFactories, RTreePolicyType rtreePolicyType,
+            IBinaryComparatorFactory[] btreeComparatorFactories, ILinearizeComparatorFactory linearizerCmpFactory) {
+        return ((RTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory(secondaryValueProviderFactories,
+                rtreePolicyType, null);
+    }
+
+    @Override
+    public void cleanup() throws Exception {
+        destroyPrimaryIndex();
+        destroySecondaryIndex();
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexScanOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexScanOperatorTest.java
deleted file mode 100644
index 33ddca2..0000000
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexScanOperatorTest.java
+++ /dev/null
@@ -1,209 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.tests.btree;
-
-import java.io.DataOutput;
-import java.io.File;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-
-import org.junit.AfterClass;
-import org.junit.Before;
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.dataset.ResultSetId;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.api.job.JobSpecification;
-import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-import edu.uci.ics.hyracks.test.support.TestIndexRegistryProvider;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
-import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
-import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
-
-public class BTreePrimaryIndexScanOperatorTest extends AbstractIntegrationTest {
-    static {
-        TestStorageManagerComponentHolder.init(8192, 20, 20);
-    }
-
-    private IStorageManagerInterface storageManager = new TestStorageManagerInterface();
-    private IIndexRegistryProvider<IIndex> indexRegistryProvider = new TestIndexRegistryProvider();
-    private IIndexDataflowHelperFactory dataflowHelperFactory = new BTreeDataflowHelperFactory();
-
-    private final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
-    private final static String sep = System.getProperty("file.separator");
-
-    // field, type and key declarations for primary index
-    private int primaryFieldCount = 6;
-    private ITypeTraits[] primaryTypeTraits = new ITypeTraits[primaryFieldCount];
-    private int primaryKeyFieldCount = 1;
-    private IBinaryComparatorFactory[] primaryComparatorFactories = new IBinaryComparatorFactory[primaryKeyFieldCount];
-
-    private static String primaryBtreeName = "primary" + simpleDateFormat.format(new Date());
-    private static String primaryFileName = System.getProperty("java.io.tmpdir") + sep + primaryBtreeName;
-
-    private IFileSplitProvider primaryBtreeSplitProvider = new ConstantFileSplitProvider(
-            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(primaryFileName))) });
-
-    private RecordDescriptor primaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
-
-    @Before
-    public void setup() throws Exception {
-        // field, type and key declarations for primary index
-        primaryTypeTraits[0] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[1] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[2] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[3] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[4] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[5] = UTF8StringPointable.TYPE_TRAITS;
-        primaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
-
-        createPrimaryIndex();
-        loadPrimaryIndexTest();
-    }
-
-    public void createPrimaryIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
-        spec.addRoot(primaryCreateOp);
-        runTest(spec);
-    }
-
-    public void loadPrimaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        FileSplit[] ordersSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
-                "data/tpch0.001/orders-part1.tbl"))) };
-        IFileSplitProvider ordersSplitProvider = new ConstantFileSplitProvider(ordersSplits);
-        RecordDescriptor ordersDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE });
-
-        FileScanOperatorDescriptor ordScanner = new FileScanOperatorDescriptor(spec, ordersSplitProvider,
-                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE }, '|'), ordersDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, ordScanner, NC1_ID);
-
-        ExternalSortOperatorDescriptor sorter = new ExternalSortOperatorDescriptor(spec, 1000, new int[] { 0 },
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
-                ordersDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID);
-
-        int[] fieldPermutation = { 0, 1, 2, 4, 5, 7 };
-        TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
-                primaryComparatorFactories, fieldPermutation, 0.7f, dataflowHelperFactory,
-                NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), sorter, 0, primaryBtreeBulkLoad, 0);
-
-        spec.addRoot(primaryBtreeBulkLoad);
-        runTest(spec);
-    }
-
-    @Test
-    public void scanPrimaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        // build dummy tuple containing nothing
-        ArrayTupleBuilder tb = new ArrayTupleBuilder(primaryKeyFieldCount * 2);
-        DataOutput dos = tb.getDataOutput();
-
-        tb.reset();
-        UTF8StringSerializerDeserializer.INSTANCE.serialize("0", dos);
-        tb.addFieldEndOffset();
-
-        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE };
-        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
-
-        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
-                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
-
-        int[] lowKeyFields = null; // - infinity
-        int[] highKeyFields = null; // + infinity
-
-        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
-                primaryComparatorFactories, lowKeyFields, highKeyFields, true, true, dataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
-
-        ResultSetId rsId = new ResultSetId(1);
-        spec.addResultSetId(rsId);
-
-        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
-                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryBtreeSearchOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeSearchOp, 0, printer, 0);
-
-        spec.addRoot(printer);
-        runTest(spec);
-    }
-
-    @AfterClass
-    public static void cleanup() throws Exception {
-        File primary = new File(primaryFileName);
-        primary.deleteOnExit();
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexSearchOperatorTest.java
deleted file mode 100644
index acd3027..0000000
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexSearchOperatorTest.java
+++ /dev/null
@@ -1,214 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.tests.btree;
-
-import java.io.DataOutput;
-import java.io.File;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-
-import org.junit.AfterClass;
-import org.junit.Before;
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.dataset.ResultSetId;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.api.job.JobSpecification;
-import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-import edu.uci.ics.hyracks.test.support.TestIndexRegistryProvider;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
-import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
-import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
-
-public class BTreePrimaryIndexSearchOperatorTest extends AbstractIntegrationTest {
-    static {
-        TestStorageManagerComponentHolder.init(8192, 20, 20);
-    }
-
-    private IStorageManagerInterface storageManager = new TestStorageManagerInterface();
-    private IIndexRegistryProvider<IIndex> indexRegistryProvider = new TestIndexRegistryProvider();
-    private IIndexDataflowHelperFactory dataflowHelperFactory = new BTreeDataflowHelperFactory();
-
-    private final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
-    private final static String sep = System.getProperty("file.separator");
-
-    // field, type and key declarations for primary index
-    private int primaryFieldCount = 6;
-    private ITypeTraits[] primaryTypeTraits = new ITypeTraits[primaryFieldCount];
-    private int primaryKeyFieldCount = 1;
-    private IBinaryComparatorFactory[] primaryComparatorFactories = new IBinaryComparatorFactory[primaryKeyFieldCount];
-
-    private static String primaryBtreeName = "primary" + simpleDateFormat.format(new Date());
-    private static String primaryFileName = System.getProperty("java.io.tmpdir") + sep + primaryBtreeName;
-
-    private IFileSplitProvider primaryBtreeSplitProvider = new ConstantFileSplitProvider(
-            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(primaryFileName))) });
-
-    private RecordDescriptor primaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
-
-    @Before
-    public void setup() throws Exception {
-        // field, type and key declarations for primary index
-        primaryTypeTraits[0] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[1] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[2] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[3] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[4] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[5] = UTF8StringPointable.TYPE_TRAITS;
-        primaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
-
-        createPrimaryIndex();
-        loadPrimaryIndexTest();
-    }
-
-    public void createPrimaryIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
-        spec.addRoot(primaryCreateOp);
-        runTest(spec);
-    }
-
-    public void loadPrimaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        FileSplit[] ordersSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
-                "data/tpch0.001/orders-part1.tbl"))) };
-        IFileSplitProvider ordersSplitProvider = new ConstantFileSplitProvider(ordersSplits);
-        RecordDescriptor ordersDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE });
-
-        FileScanOperatorDescriptor ordScanner = new FileScanOperatorDescriptor(spec, ordersSplitProvider,
-                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE }, '|'), ordersDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, ordScanner, NC1_ID);
-
-        ExternalSortOperatorDescriptor sorter = new ExternalSortOperatorDescriptor(spec, 1000, new int[] { 0 },
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
-                ordersDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID);
-
-        int[] fieldPermutation = { 0, 1, 2, 4, 5, 7 };
-        TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
-                primaryComparatorFactories, fieldPermutation, 0.7f, dataflowHelperFactory,
-                NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), sorter, 0, primaryBtreeBulkLoad, 0);
-
-        spec.addRoot(primaryBtreeBulkLoad);
-        runTest(spec);
-    }
-
-    @Test
-    public void searchPrimaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        // build tuple containing low and high search key
-        // high key and low key
-        ArrayTupleBuilder tb = new ArrayTupleBuilder(primaryKeyFieldCount * 2);
-        DataOutput dos = tb.getDataOutput();
-
-        tb.reset();
-        // low key
-        UTF8StringSerializerDeserializer.INSTANCE.serialize("100", dos);
-        tb.addFieldEndOffset();
-        // high key
-        UTF8StringSerializerDeserializer.INSTANCE.serialize("200", dos);
-        tb.addFieldEndOffset();
-
-        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE };
-        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
-
-        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
-                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
-
-        int[] lowKeyFields = { 0 };
-        int[] highKeyFields = { 1 };
-
-        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
-                primaryComparatorFactories, lowKeyFields, highKeyFields, true, true, dataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
-
-        ResultSetId rsId = new ResultSetId(1);
-        spec.addResultSetId(rsId);
-
-        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
-                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryBtreeSearchOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeSearchOp, 0, printer, 0);
-
-        spec.addRoot(printer);
-        runTest(spec);
-    }
-
-    @AfterClass
-    public static void cleanup() throws Exception {
-        File primary = new File(primaryFileName);
-        primary.deleteOnExit();
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexStatsOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexStatsOperatorTest.java
deleted file mode 100644
index ca03b16..0000000
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexStatsOperatorTest.java
+++ /dev/null
@@ -1,179 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.tests.btree;
-
-import java.io.File;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-
-import org.junit.AfterClass;
-import org.junit.Before;
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.dataset.ResultSetId;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.api.job.JobSpecification;
-import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexStatsOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-import edu.uci.ics.hyracks.test.support.TestIndexRegistryProvider;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
-import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
-import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
-
-public class BTreePrimaryIndexStatsOperatorTest extends AbstractIntegrationTest {
-    static {
-        TestStorageManagerComponentHolder.init(8192, 20, 20);
-    }
-
-    private IStorageManagerInterface storageManager = new TestStorageManagerInterface();
-    private IIndexRegistryProvider<IIndex> indexRegistryProvider = new TestIndexRegistryProvider();
-    private IIndexDataflowHelperFactory dataflowHelperFactory = new BTreeDataflowHelperFactory();
-
-    private final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
-    private final static String sep = System.getProperty("file.separator");
-
-    // field, type and key declarations for primary index
-    private int primaryFieldCount = 6;
-    private ITypeTraits[] primaryTypeTraits = new ITypeTraits[primaryFieldCount];
-    private int primaryKeyFieldCount = 1;
-    private IBinaryComparatorFactory[] primaryComparatorFactories = new IBinaryComparatorFactory[primaryKeyFieldCount];
-
-    private static String primaryBtreeName = "primary" + simpleDateFormat.format(new Date());
-    private static String primaryFileName = System.getProperty("java.io.tmpdir") + sep + primaryBtreeName;
-
-    private IFileSplitProvider primaryBtreeSplitProvider = new ConstantFileSplitProvider(
-            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(primaryFileName))) });
-
-    @Before
-    public void setup() throws Exception {
-        // field, type and key declarations for primary index
-        primaryTypeTraits[0] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[1] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[2] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[3] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[4] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[5] = UTF8StringPointable.TYPE_TRAITS;
-        primaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
-
-        createPrimaryIndex();
-        loadPrimaryIndexTest();
-    }
-
-    public void createPrimaryIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
-        spec.addRoot(primaryCreateOp);
-        runTest(spec);
-    }
-
-    public void loadPrimaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        FileSplit[] ordersSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
-                "data/tpch0.001/orders-part1.tbl"))) };
-        IFileSplitProvider ordersSplitProvider = new ConstantFileSplitProvider(ordersSplits);
-        RecordDescriptor ordersDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE });
-
-        FileScanOperatorDescriptor ordScanner = new FileScanOperatorDescriptor(spec, ordersSplitProvider,
-                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE }, '|'), ordersDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, ordScanner, NC1_ID);
-
-        ExternalSortOperatorDescriptor sorter = new ExternalSortOperatorDescriptor(spec, 1000, new int[] { 0 },
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
-                ordersDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID);
-
-        int[] fieldPermutation = { 0, 1, 2, 4, 5, 7 };
-        TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
-                primaryComparatorFactories, fieldPermutation, 0.7f, dataflowHelperFactory,
-                NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), sorter, 0, primaryBtreeBulkLoad, 0);
-
-        spec.addRoot(primaryBtreeBulkLoad);
-        runTest(spec);
-    }
-
-    @Test
-    public void showPrimaryIndexStats() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        TreeIndexStatsOperatorDescriptor primaryStatsOp = new TreeIndexStatsOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryStatsOp, NC1_ID);
-
-        ResultSetId rsId = new ResultSetId(1);
-        spec.addResultSetId(rsId);
-
-        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
-                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), primaryStatsOp, 0, printer, 0);
-        spec.addRoot(printer);
-        runTest(spec);
-    }
-
-    @AfterClass
-    public static void cleanup() throws Exception {
-        File primary = new File(primaryFileName);
-        primary.deleteOnExit();
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeSecondaryIndexInsertOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeSecondaryIndexInsertOperatorTest.java
deleted file mode 100644
index 34a1cd3..0000000
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeSecondaryIndexInsertOperatorTest.java
+++ /dev/null
@@ -1,367 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.tests.btree;
-
-import java.io.DataOutput;
-import java.io.File;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-
-import org.junit.AfterClass;
-import org.junit.Before;
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.dataset.ResultSetId;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.api.job.JobSpecification;
-import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.misc.NullSinkOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexInsertUpdateDeleteOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOp;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-import edu.uci.ics.hyracks.test.support.TestIndexRegistryProvider;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
-import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
-import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
-
-public class BTreeSecondaryIndexInsertOperatorTest extends AbstractIntegrationTest {
-    static {
-        TestStorageManagerComponentHolder.init(8192, 20, 20);
-    }
-
-    private IStorageManagerInterface storageManager = new TestStorageManagerInterface();
-    private IIndexRegistryProvider<IIndex> indexRegistryProvider = new TestIndexRegistryProvider();
-    private IIndexDataflowHelperFactory dataflowHelperFactory = new BTreeDataflowHelperFactory();
-
-    private final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
-    private final static String sep = System.getProperty("file.separator");
-
-    // field, type and key declarations for primary index
-    private int primaryFieldCount = 6;
-    private ITypeTraits[] primaryTypeTraits = new ITypeTraits[primaryFieldCount];
-    private int primaryKeyFieldCount = 1;
-    private IBinaryComparatorFactory[] primaryComparatorFactories = new IBinaryComparatorFactory[primaryKeyFieldCount];
-
-    private static String primaryBtreeName = "primary" + simpleDateFormat.format(new Date());
-    private static String primaryFileName = System.getProperty("java.io.tmpdir") + sep + primaryBtreeName;
-
-    private IFileSplitProvider primaryBtreeSplitProvider = new ConstantFileSplitProvider(
-            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(primaryFileName))) });
-
-    private RecordDescriptor primaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
-
-    // field, type and key declarations for secondary indexes
-    private int secondaryFieldCount = 2;
-    private ITypeTraits[] secondaryTypeTraits = new ITypeTraits[secondaryFieldCount];
-    private int secondaryKeyFieldCount = 2;
-    private IBinaryComparatorFactory[] secondaryComparatorFactories = new IBinaryComparatorFactory[secondaryKeyFieldCount];
-
-    private static String secondaryBtreeName = "secondary" + simpleDateFormat.format(new Date());
-    private static String secondaryFileName = System.getProperty("java.io.tmpdir") + sep + secondaryBtreeName;
-
-    private IFileSplitProvider secondaryBtreeSplitProvider = new ConstantFileSplitProvider(
-            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(secondaryFileName))) });
-
-    private RecordDescriptor secondaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
-
-    @Before
-    public void setup() throws Exception {
-        // field, type and key declarations for primary index
-        primaryTypeTraits[0] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[1] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[2] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[3] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[4] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[5] = UTF8StringPointable.TYPE_TRAITS;
-        primaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
-
-        // field, type and key declarations for secondary indexes
-        secondaryTypeTraits[0] = UTF8StringPointable.TYPE_TRAITS;
-        secondaryTypeTraits[1] = UTF8StringPointable.TYPE_TRAITS;
-        secondaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
-        secondaryComparatorFactories[1] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
-
-        createPrimaryIndex();
-        loadPrimaryIndexTest();
-        createSecondaryIndex();
-        loadSecondaryIndexTest();
-        insertPipelineTest();
-    }
-
-    public void createPrimaryIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
-        spec.addRoot(primaryCreateOp);
-        runTest(spec);
-    }
-    
-    public void loadPrimaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        FileSplit[] ordersSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
-                "data/tpch0.001/orders-part1.tbl"))) };
-        IFileSplitProvider ordersSplitProvider = new ConstantFileSplitProvider(ordersSplits);
-        RecordDescriptor ordersDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE });
-
-        FileScanOperatorDescriptor ordScanner = new FileScanOperatorDescriptor(spec, ordersSplitProvider,
-                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE }, '|'), ordersDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, ordScanner, NC1_ID);
-
-        ExternalSortOperatorDescriptor sorter = new ExternalSortOperatorDescriptor(spec, 1000, new int[] { 0 },
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
-                ordersDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID);
-
-        int[] fieldPermutation = { 0, 1, 2, 4, 5, 7 };
-        TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories, fieldPermutation, 0.7f,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), sorter, 0, primaryBtreeBulkLoad, 0);
-
-        spec.addRoot(primaryBtreeBulkLoad);
-        runTest(spec);
-    }
-
-    public void createSecondaryIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        TreeIndexCreateOperatorDescriptor secondaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, secondaryBtreeSplitProvider, secondaryTypeTraits, secondaryComparatorFactories,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryCreateOp, NC1_ID);
-        spec.addRoot(secondaryCreateOp);
-        runTest(spec);
-    }
-    
-    public void loadSecondaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        // build dummy tuple containing nothing
-        ArrayTupleBuilder tb = new ArrayTupleBuilder(primaryKeyFieldCount * 2);
-        DataOutput dos = tb.getDataOutput();
-
-        tb.reset();
-        UTF8StringSerializerDeserializer.INSTANCE.serialize("0", dos);
-        tb.addFieldEndOffset();
-
-        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE };
-        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
-
-        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
-                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
-
-        int[] lowKeyFields = null; // - infinity
-        int[] highKeyFields = null; // + infinity
-
-        // scan primary index
-        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories, lowKeyFields,
-                highKeyFields, true, true, dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
-
-        // sort based on secondary keys
-        ExternalSortOperatorDescriptor sorter = new ExternalSortOperatorDescriptor(spec, 1000, new int[] { 3, 0 },
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
-                primaryRecDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID);
-
-        // load secondary index
-        int[] fieldPermutation = { 3, 0 };
-        TreeIndexBulkLoadOperatorDescriptor secondaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, secondaryBtreeSplitProvider, secondaryTypeTraits, secondaryComparatorFactories, fieldPermutation, 0.7f,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeBulkLoad, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryBtreeSearchOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeSearchOp, 0, sorter, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), sorter, 0, secondaryBtreeBulkLoad, 0);
-
-        spec.addRoot(secondaryBtreeBulkLoad);
-        runTest(spec);
-    }
-
-    public void insertPipelineTest() throws Exception {
-
-        JobSpecification spec = new JobSpecification();
-
-        FileSplit[] ordersSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
-                "data/tpch0.001/orders-part2.tbl"))) };
-        IFileSplitProvider ordersSplitProvider = new ConstantFileSplitProvider(ordersSplits);
-        RecordDescriptor ordersDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE });
-
-        FileScanOperatorDescriptor ordScanner = new FileScanOperatorDescriptor(spec, ordersSplitProvider,
-                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE }, '|'), ordersDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, ordScanner, NC1_ID);
-
-        // insert into primary index
-        int[] primaryFieldPermutation = { 0, 1, 2, 4, 5, 7 };
-        TreeIndexInsertUpdateDeleteOperatorDescriptor primaryBtreeInsertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, ordersDesc, storageManager, indexRegistryProvider, primaryBtreeSplitProvider,
-                primaryTypeTraits, primaryComparatorFactories,
-                primaryFieldPermutation, IndexOp.INSERT, dataflowHelperFactory, null, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeInsertOp, NC1_ID);
-
-        // first secondary index
-        int[] fieldPermutationB = { 4, 0 };
-        TreeIndexInsertUpdateDeleteOperatorDescriptor secondaryInsertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, ordersDesc, storageManager, indexRegistryProvider, secondaryBtreeSplitProvider,
-                secondaryTypeTraits,
-                secondaryComparatorFactories, fieldPermutationB, IndexOp.INSERT, dataflowHelperFactory, null, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryInsertOp, NC1_ID);
-
-        NullSinkOperatorDescriptor nullSink = new NullSinkOperatorDescriptor(spec);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, nullSink, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, primaryBtreeInsertOp, 0);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeInsertOp, 0, secondaryInsertOp, 0);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), secondaryInsertOp, 0, nullSink, 0);
-
-        spec.addRoot(nullSink);
-        runTest(spec);
-    }
-
-    @Test
-    public void searchUpdatedSecondaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        // build tuple containing search keys (only use the first key as search
-        // key)
-        ArrayTupleBuilder tb = new ArrayTupleBuilder(secondaryKeyFieldCount);
-        DataOutput dos = tb.getDataOutput();
-
-        tb.reset();
-        // low key
-        UTF8StringSerializerDeserializer.INSTANCE.serialize("1998-07-21", dos);
-        tb.addFieldEndOffset();
-        // high key
-        UTF8StringSerializerDeserializer.INSTANCE.serialize("2000-10-18", dos);
-        tb.addFieldEndOffset();
-
-        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE };
-        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
-
-        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
-                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
-
-        int[] secondaryLowKeyFields = { 0 };
-        int[] secondaryHighKeyFields = { 1 };
-
-        // search secondary index
-        BTreeSearchOperatorDescriptor secondaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec,
-                secondaryRecDesc, storageManager, indexRegistryProvider, secondaryBtreeSplitProvider,
-                secondaryTypeTraits,
-                secondaryComparatorFactories, secondaryLowKeyFields, secondaryHighKeyFields, true, true,
-                dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeSearchOp, NC1_ID);
-
-        // second field from the tuples coming from secondary index
-        int[] primaryLowKeyFields = { 1 };
-        // second field from the tuples coming from secondary index
-        int[] primaryHighKeyFields = { 1 };
-
-        // search primary index
-        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories, primaryLowKeyFields,
-                primaryHighKeyFields, true, true, dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
-
-        ResultSetId rsId = new ResultSetId(1);
-        spec.addResultSetId(rsId);
-
-        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
-                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, secondaryBtreeSearchOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), secondaryBtreeSearchOp, 0, primaryBtreeSearchOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeSearchOp, 0, printer, 0);
-
-        spec.addRoot(printer);
-        runTest(spec);
-    }
-
-    @AfterClass
-    public static void cleanup() throws Exception {
-        File primary = new File(primaryFileName);
-        primary.deleteOnExit();
-
-        File secondary = new File(secondaryFileName);
-        secondary.deleteOnExit();
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeSecondaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeSecondaryIndexSearchOperatorTest.java
deleted file mode 100644
index c9ee118..0000000
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeSecondaryIndexSearchOperatorTest.java
+++ /dev/null
@@ -1,314 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.tests.btree;
-
-import java.io.DataOutput;
-import java.io.File;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-
-import org.junit.AfterClass;
-import org.junit.Before;
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.dataset.ResultSetId;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.api.job.JobSpecification;
-import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-import edu.uci.ics.hyracks.test.support.TestIndexRegistryProvider;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
-import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
-import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
-
-public class BTreeSecondaryIndexSearchOperatorTest extends AbstractIntegrationTest {
-    static {
-        TestStorageManagerComponentHolder.init(8192, 20, 20);
-    }
-
-    private IStorageManagerInterface storageManager = new TestStorageManagerInterface();
-    private IIndexRegistryProvider<IIndex> indexRegistryProvider = new TestIndexRegistryProvider();
-    private IIndexDataflowHelperFactory dataflowHelperFactory = new BTreeDataflowHelperFactory();
-
-    private final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
-    private final static String sep = System.getProperty("file.separator");
-
-    // field, type and key declarations for primary index
-    private int primaryFieldCount = 6;
-    private ITypeTraits[] primaryTypeTraits = new ITypeTraits[primaryFieldCount];
-    private int primaryKeyFieldCount = 1;
-    private IBinaryComparatorFactory[] primaryComparatorFactories = new IBinaryComparatorFactory[primaryKeyFieldCount];
-
-    private static String primaryBtreeName = "primary" + simpleDateFormat.format(new Date());
-    private static String primaryFileName = System.getProperty("java.io.tmpdir") + sep + primaryBtreeName;
-
-    private IFileSplitProvider primaryBtreeSplitProvider = new ConstantFileSplitProvider(
-            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(primaryFileName))) });
-
-    private RecordDescriptor primaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
-
-    // field, type and key declarations for secondary indexes
-    private int secondaryFieldCount = 2;
-    private ITypeTraits[] secondaryTypeTraits = new ITypeTraits[secondaryFieldCount];
-    private int secondaryKeyFieldCount = 2;
-    private IBinaryComparatorFactory[] secondaryComparatorFactories = new IBinaryComparatorFactory[secondaryKeyFieldCount];
-
-    private static String secondaryBtreeName = "secondary" + simpleDateFormat.format(new Date());
-    private static String secondaryFileName = System.getProperty("java.io.tmpdir") + sep + secondaryBtreeName;
-
-    private IFileSplitProvider secondaryBtreeSplitProvider = new ConstantFileSplitProvider(
-            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(secondaryFileName))) });
-
-    private RecordDescriptor secondaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
-
-    @Before
-    public void setup() throws Exception {
-        // field, type and key declarations for primary index
-        primaryTypeTraits[0] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[1] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[2] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[3] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[4] = UTF8StringPointable.TYPE_TRAITS;
-        primaryTypeTraits[5] = UTF8StringPointable.TYPE_TRAITS;
-        primaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
-
-        // field, type and key declarations for secondary indexes
-        secondaryTypeTraits[0] = UTF8StringPointable.TYPE_TRAITS;
-        secondaryTypeTraits[1] = UTF8StringPointable.TYPE_TRAITS;
-        secondaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
-        secondaryComparatorFactories[1] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
-
-        createPrimaryIndex();
-        loadPrimaryIndexTest();
-        createSecondaryIndex();
-        loadSecondaryIndexTest();
-    }
-
-    public void createPrimaryIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
-        spec.addRoot(primaryCreateOp);
-        runTest(spec);
-    }
-
-    public void loadPrimaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        FileSplit[] ordersSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
-                "data/tpch0.001/orders-part1.tbl"))) };
-        IFileSplitProvider ordersSplitProvider = new ConstantFileSplitProvider(ordersSplits);
-        RecordDescriptor ordersDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE });
-
-        FileScanOperatorDescriptor ordScanner = new FileScanOperatorDescriptor(spec, ordersSplitProvider,
-                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE }, '|'), ordersDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, ordScanner, NC1_ID);
-
-        ExternalSortOperatorDescriptor sorter = new ExternalSortOperatorDescriptor(spec, 1000, new int[] { 0 },
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
-                ordersDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID);
-
-        int[] fieldPermutation = { 0, 1, 2, 4, 5, 7 };
-        TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
-                primaryComparatorFactories, fieldPermutation, 0.7f, dataflowHelperFactory,
-                NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), sorter, 0, primaryBtreeBulkLoad, 0);
-
-        spec.addRoot(primaryBtreeBulkLoad);
-        runTest(spec);
-    }
-
-    public void createSecondaryIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        TreeIndexCreateOperatorDescriptor secondaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, secondaryBtreeSplitProvider, secondaryTypeTraits,
-                secondaryComparatorFactories, dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryCreateOp, NC1_ID);
-        spec.addRoot(secondaryCreateOp);
-        runTest(spec);
-    }
-
-    public void loadSecondaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        // build dummy tuple containing nothing
-        ArrayTupleBuilder tb = new ArrayTupleBuilder(primaryKeyFieldCount * 2);
-        DataOutput dos = tb.getDataOutput();
-
-        tb.reset();
-        UTF8StringSerializerDeserializer.INSTANCE.serialize("0", dos);
-        tb.addFieldEndOffset();
-
-        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE };
-        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
-
-        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
-                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
-
-        int[] lowKeyFields = null; // - infinity
-        int[] highKeyFields = null; // + infinity
-
-        // scan primary index
-        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
-                primaryComparatorFactories, lowKeyFields, highKeyFields, true, true, dataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
-
-        // sort based on secondary keys
-        ExternalSortOperatorDescriptor sorter = new ExternalSortOperatorDescriptor(spec, 1000, new int[] { 3, 0 },
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
-                primaryRecDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID);
-
-        // load secondary index
-        int[] fieldPermutation = { 3, 0 };
-        TreeIndexBulkLoadOperatorDescriptor secondaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, secondaryBtreeSplitProvider, secondaryTypeTraits,
-                secondaryComparatorFactories, fieldPermutation, 0.7f, dataflowHelperFactory,
-                NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeBulkLoad, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryBtreeSearchOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeSearchOp, 0, sorter, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), sorter, 0, secondaryBtreeBulkLoad, 0);
-
-        spec.addRoot(secondaryBtreeBulkLoad);
-        runTest(spec);
-    }
-
-    @Test
-    public void searchSecondaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        // build tuple containing search keys (only use the first key as search
-        // key)
-        ArrayTupleBuilder tb = new ArrayTupleBuilder(secondaryKeyFieldCount);
-        DataOutput dos = tb.getDataOutput();
-
-        tb.reset();
-        // low key
-        UTF8StringSerializerDeserializer.INSTANCE.serialize("1998-07-21", dos);
-        tb.addFieldEndOffset();
-        // high key
-        UTF8StringSerializerDeserializer.INSTANCE.serialize("2000-10-18", dos);
-        tb.addFieldEndOffset();
-
-        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE };
-        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
-
-        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
-                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
-
-        int[] secondaryLowKeyFields = { 0 };
-        int[] secondaryHighKeyFields = { 1 };
-
-        // search secondary index
-        BTreeSearchOperatorDescriptor secondaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec,
-                secondaryRecDesc, storageManager, indexRegistryProvider, secondaryBtreeSplitProvider,
-                secondaryTypeTraits, secondaryComparatorFactories, secondaryLowKeyFields, secondaryHighKeyFields, true,
-                true, dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeSearchOp, NC1_ID);
-
-        int[] primaryLowKeyFields = { 1 }; // second field from the tuples
-        // coming from secondary index
-        int[] primaryHighKeyFields = { 1 }; // second field from the tuples
-        // coming from secondary index
-
-        // search primary index
-        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
-                primaryComparatorFactories, primaryLowKeyFields, primaryHighKeyFields, true, true,
-                dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
-
-        ResultSetId rsId = new ResultSetId(1);
-        spec.addResultSetId(rsId);
-
-        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
-                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, secondaryBtreeSearchOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), secondaryBtreeSearchOp, 0, primaryBtreeSearchOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeSearchOp, 0, printer, 0);
-
-        spec.addRoot(printer);
-        runTest(spec);
-    }
-
-    @AfterClass
-    public static void cleanup() throws Exception {
-        File primary = new File(primaryFileName);
-        primary.deleteOnExit();
-        File secondary = new File(secondaryFileName);
-        secondary.deleteOnExit();
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractIntegrationTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractIntegrationTest.java
index 8893567..e74e54c 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractIntegrationTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractIntegrationTest.java
@@ -60,6 +60,9 @@
     private static IHyracksClientConnection hcc;
 
     private final List<File> outputFiles;
+    
+    protected static int DEFAULT_MEM_PAGE_SIZE = 32768;
+    protected static int DEFAULT_MEM_NUM_PAGES = 1000;
 
     @Rule
     public TemporaryFolder outputFolder = new TemporaryFolder();
@@ -106,7 +109,6 @@
         nc2.start();
 
         hcc = new HyracksConnection(ccConfig.clientNetIpAddress, ccConfig.clientNetPort);
-        hcc.createApplication("test", null);
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("Starting CC in " + ccRoot.getAbsolutePath());
         }
@@ -123,7 +125,7 @@
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info(spec.toJSON().toString(2));
         }
-        JobId jobId = hcc.startJob("test", spec, EnumSet.of(JobFlag.PROFILE_RUNTIME));
+        JobId jobId = hcc.startJob(spec, EnumSet.of(JobFlag.PROFILE_RUNTIME));
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info(jobId.toString());
         }
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractMultiNCIntegrationTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractMultiNCIntegrationTest.java
index 24d0ef4..d97b7db 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractMultiNCIntegrationTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractMultiNCIntegrationTest.java
@@ -100,7 +100,6 @@
         }
 
         hcc = new HyracksConnection(ccConfig.clientNetIpAddress, ccConfig.clientNetPort);
-        hcc.createApplication("test", null);
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("Starting CC in " + ccRoot.getAbsolutePath());
         }
@@ -118,7 +117,7 @@
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info(spec.toJSON().toString(2));
         }
-        JobId jobId = hcc.startJob("test", spec, EnumSet.of(JobFlag.PROFILE_RUNTIME));
+        JobId jobId = hcc.startJob(spec, EnumSet.of(JobFlag.PROFILE_RUNTIME));
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info(jobId.toString());
         }
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/BinaryTokenizerOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/BinaryTokenizerOperatorTest.java
deleted file mode 100644
index 600b54b..0000000
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/BinaryTokenizerOperatorTest.java
+++ /dev/null
@@ -1,77 +0,0 @@
-package edu.uci.ics.hyracks.tests.invertedindex;
-
-import java.io.File;
-
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.dataset.ResultSetId;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.api.job.JobSpecification;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.IntegerParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.dataflow.BinaryTokenizerOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.DelimitedUTF8StringBinaryTokenizerFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizerFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.ITokenFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.UTF8WordTokenFactory;
-import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
-import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
-
-public class BinaryTokenizerOperatorTest extends AbstractIntegrationTest {
-
-    @Test
-    public void tokenizerTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        FileSplit[] dblpTitleFileSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
-                "data/cleanednumbereddblptitles.txt"))) };
-        IFileSplitProvider dblpTitleSplitProvider = new ConstantFileSplitProvider(dblpTitleFileSplits);
-        RecordDescriptor dblpTitleRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-                IntegerSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
-
-        FileScanOperatorDescriptor dblpTitleScanner = new FileScanOperatorDescriptor(spec, dblpTitleSplitProvider,
-                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { IntegerParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE }, '|'), dblpTitleRecDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, dblpTitleScanner, NC1_ID);
-
-        RecordDescriptor tokenizerRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE });
-
-        ITokenFactory tokenFactory = new UTF8WordTokenFactory();
-        IBinaryTokenizerFactory tokenizerFactory = new DelimitedUTF8StringBinaryTokenizerFactory(true, false,
-                tokenFactory);
-        int[] tokenFields = { 1 };
-        int[] keyFields = { 0 };
-        BinaryTokenizerOperatorDescriptor binaryTokenizer = new BinaryTokenizerOperatorDescriptor(spec,
-                tokenizerRecDesc, tokenizerFactory, tokenFields, keyFields);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, binaryTokenizer, NC1_ID);
-
-        ResultSetId rsId = new ResultSetId(1);
-        spec.addResultSetId(rsId);
-
-        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
-                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), dblpTitleScanner, 0, binaryTokenizer, 0);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), binaryTokenizer, 0, printer, 0);
-
-        spec.addRoot(printer);
-        runTest(spec);
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/InvertedIndexOperatorsTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/InvertedIndexOperatorsTest.java
deleted file mode 100644
index b5a4df8..0000000
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/InvertedIndexOperatorsTest.java
+++ /dev/null
@@ -1,77 +0,0 @@
-package edu.uci.ics.hyracks.tests.invertedindex;
-
-import java.io.File;
-
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.dataset.ResultSetId;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.api.job.JobSpecification;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.IntegerParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.dataflow.BinaryTokenizerOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.DelimitedUTF8StringBinaryTokenizerFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizerFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.ITokenFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.UTF8WordTokenFactory;
-import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
-import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
-
-public class InvertedIndexOperatorsTest extends AbstractIntegrationTest {
-
-    @Test
-    public void tokenizerTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        FileSplit[] dblpTitleFileSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
-                "data/cleanednumbereddblptitles.txt"))) };
-        IFileSplitProvider dblpTitleSplitProvider = new ConstantFileSplitProvider(dblpTitleFileSplits);
-        RecordDescriptor dblpTitleRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-                IntegerSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
-
-        FileScanOperatorDescriptor dblpTitleScanner = new FileScanOperatorDescriptor(spec, dblpTitleSplitProvider,
-                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { IntegerParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE }, '|'), dblpTitleRecDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, dblpTitleScanner, NC1_ID);
-
-        RecordDescriptor tokenizerRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE });
-
-        ITokenFactory tokenFactory = new UTF8WordTokenFactory();
-        IBinaryTokenizerFactory tokenizerFactory = new DelimitedUTF8StringBinaryTokenizerFactory(true, false,
-                tokenFactory);
-        int[] tokenFields = { 1 };
-        int[] projFields = { 0 };
-        BinaryTokenizerOperatorDescriptor binaryTokenizer = new BinaryTokenizerOperatorDescriptor(spec,
-                tokenizerRecDesc, tokenizerFactory, tokenFields, projFields);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, binaryTokenizer, NC1_ID);
-
-        ResultSetId rsId = new ResultSetId(1);
-        spec.addResultSetId(rsId);
-
-        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
-                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), dblpTitleScanner, 0, binaryTokenizer, 0);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), binaryTokenizer, 0, printer, 0);
-
-        spec.addRoot(printer);
-        runTest(spec);
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/WordInvertedIndexTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/WordInvertedIndexTest.java
deleted file mode 100644
index d1071a3..0000000
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/WordInvertedIndexTest.java
+++ /dev/null
@@ -1,358 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.tests.invertedindex;
-
-import java.io.DataOutput;
-import java.io.File;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-
-import org.junit.AfterClass;
-import org.junit.Before;
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.dataset.ResultSetId;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.api.job.JobSpecification;
-import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
-import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.IntegerParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifierFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.dataflow.BinaryTokenizerOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.dataflow.InvertedIndexBulkLoadOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.dataflow.InvertedIndexCreateOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.dataflow.InvertedIndexSearchOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.searchmodifiers.ConjunctiveSearchModifierFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.DelimitedUTF8StringBinaryTokenizerFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizerFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.ITokenFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.UTF8WordTokenFactory;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-import edu.uci.ics.hyracks.test.support.TestIndexRegistryProvider;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
-import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
-import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
-
-public class WordInvertedIndexTest extends AbstractIntegrationTest {
-    static {
-        TestStorageManagerComponentHolder.init(8192, 20, 20);
-    }
-
-    private IStorageManagerInterface storageManager = new TestStorageManagerInterface();
-    private IIndexRegistryProvider<IIndex> indexRegistryProvider = new TestIndexRegistryProvider();
-    private IIndexDataflowHelperFactory btreeDataflowHelperFactory = new BTreeDataflowHelperFactory();
-
-    private final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
-    private final static String sep = System.getProperty("file.separator");
-    private final static String dateString = simpleDateFormat.format(new Date());
-    private final static String primaryFileName = System.getProperty("java.io.tmpdir") + sep + "primaryBtree"
-            + dateString;
-    private final static String btreeFileName = System.getProperty("java.io.tmpdir") + sep + "invIndexBtree"
-            + dateString;
-    private final static String invListsFileName = System.getProperty("java.io.tmpdir") + sep + "invIndexLists"
-            + dateString;
-
-    private IFileSplitProvider primaryFileSplitProvider = new ConstantFileSplitProvider(
-            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(primaryFileName))) });
-    private IFileSplitProvider btreeFileSplitProvider = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(
-            NC1_ID, new FileReference(new File(btreeFileName))) });
-    private IFileSplitProvider invListsFileSplitProvider = new ConstantFileSplitProvider(
-            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(invListsFileName))) });
-
-    // Primary BTree index.
-    private int primaryFieldCount = 2;
-    private ITypeTraits[] primaryTypeTraits = new ITypeTraits[primaryFieldCount];
-    private int primaryKeyFieldCount = 1;
-    private IBinaryComparatorFactory[] primaryComparatorFactories = new IBinaryComparatorFactory[primaryKeyFieldCount];
-    private RecordDescriptor primaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-            IntegerSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
-
-    // Inverted index BTree dictionary.
-    private ITypeTraits[] tokenTypeTraits = new ITypeTraits[1];
-    private IBinaryComparatorFactory[] tokenComparatorFactories = new IBinaryComparatorFactory[1];
-
-    // Inverted index stuff.
-    private int invListElementFieldCount = 1;
-    private ITypeTraits[] invListsTypeTraits = new ITypeTraits[invListElementFieldCount];
-    private IBinaryComparatorFactory[] invListsComparatorFactories = new IBinaryComparatorFactory[invListElementFieldCount];
-    private RecordDescriptor tokenizerRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-            UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE });
-    private RecordDescriptor invListsRecDesc = new RecordDescriptor(
-            new ISerializerDeserializer[] { IntegerSerializerDeserializer.INSTANCE });
-
-    // Tokenizer stuff.
-    private ITokenFactory tokenFactory = new UTF8WordTokenFactory();
-    private IBinaryTokenizerFactory tokenizerFactory = new DelimitedUTF8StringBinaryTokenizerFactory(true, false,
-            tokenFactory);
-
-    @Before
-    public void setup() throws Exception {
-        // Field declarations and comparators for primary BTree index.
-        primaryTypeTraits[0] = IntegerPointable.TYPE_TRAITS;
-        primaryTypeTraits[1] = UTF8StringPointable.TYPE_TRAITS;
-        primaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
-
-        // Field declarations and comparators for tokens.
-        tokenTypeTraits[0] = UTF8StringPointable.TYPE_TRAITS;
-        tokenComparatorFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
-
-        // Field declarations and comparators for inverted lists.
-        invListsTypeTraits[0] = IntegerPointable.TYPE_TRAITS;
-        invListsComparatorFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
-
-        createPrimaryIndex();
-        loadPrimaryIndex();
-        printPrimaryIndex();
-        createInvertedIndex();
-        loadInvertedIndex();
-    }
-
-    public void createPrimaryIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, primaryFileSplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                btreeDataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
-        spec.addRoot(primaryCreateOp);
-        runTest(spec);
-    }
-
-    @Test
-    public void testConjunctiveSearcher() throws Exception {
-        IInvertedIndexSearchModifierFactory conjunctiveSearchModifierFactory = new ConjunctiveSearchModifierFactory();
-        searchInvertedIndex("of", conjunctiveSearchModifierFactory);
-        searchInvertedIndex("3d", conjunctiveSearchModifierFactory);
-        searchInvertedIndex("of the human", conjunctiveSearchModifierFactory);
-    }
-
-    private IOperatorDescriptor createFileScanOp(JobSpecification spec) {
-        FileSplit[] dblpTitleFileSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
-                "data/cleanednumbereddblptitles.txt"))) };
-        IFileSplitProvider dblpTitleSplitProvider = new ConstantFileSplitProvider(dblpTitleFileSplits);
-        RecordDescriptor dblpTitleRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-                IntegerSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
-        FileScanOperatorDescriptor dblpTitleScanner = new FileScanOperatorDescriptor(spec, dblpTitleSplitProvider,
-                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { IntegerParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE }, '|'), dblpTitleRecDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, dblpTitleScanner, NC1_ID);
-        return dblpTitleScanner;
-    }
-
-    private IOperatorDescriptor createPrimaryBulkLoadOp(JobSpecification spec) {
-        int[] fieldPermutation = { 0, 1 };
-        TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, primaryFileSplitProvider, primaryTypeTraits,
-                primaryComparatorFactories, fieldPermutation, 0.7f, btreeDataflowHelperFactory,
-                NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
-        return primaryBtreeBulkLoad;
-    }
-
-    private IOperatorDescriptor createScanKeyProviderOp(JobSpecification spec) throws HyracksDataException {
-        // build dummy tuple containing nothing
-        ArrayTupleBuilder tb = new ArrayTupleBuilder(primaryKeyFieldCount * 2);
-        DataOutput dos = tb.getDataOutput();
-        tb.reset();
-        UTF8StringSerializerDeserializer.INSTANCE.serialize("0", dos);
-        tb.addFieldEndOffset();
-        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE };
-        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
-        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
-                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
-        return keyProviderOp;
-    }
-
-    private IOperatorDescriptor createPrimaryScanOp(JobSpecification spec) throws HyracksDataException {
-        int[] lowKeyFields = null; // - infinity
-        int[] highKeyFields = null; // + infinity
-        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
-                storageManager, indexRegistryProvider, primaryFileSplitProvider, primaryTypeTraits,
-                primaryComparatorFactories, lowKeyFields, highKeyFields, true, true, btreeDataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
-        return primaryBtreeSearchOp;
-    }
-
-    private void loadPrimaryIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        // Assuming that the data is pre-sorted on the key. No need to sort
-        // before bulk load.
-        IOperatorDescriptor fileScanOp = createFileScanOp(spec);
-        IOperatorDescriptor primaryBulkLoad = createPrimaryBulkLoadOp(spec);
-        spec.connect(new OneToOneConnectorDescriptor(spec), fileScanOp, 0, primaryBulkLoad, 0);
-        spec.addRoot(primaryBulkLoad);
-        runTest(spec);
-    }
-
-    private void printPrimaryIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        IOperatorDescriptor keyProviderOp = createScanKeyProviderOp(spec);
-        IOperatorDescriptor primaryScanOp = createPrimaryScanOp(spec);
-
-        ResultSetId rsId = new ResultSetId(1);
-        spec.addResultSetId(rsId);
-
-        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
-                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
-        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryScanOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), primaryScanOp, 0, printer, 0);
-        spec.addRoot(printer);
-        runTest(spec);
-    }
-
-    private IOperatorDescriptor createExternalSortOp(JobSpecification spec, int[] sortFields,
-            RecordDescriptor outputRecDesc) {
-        ExternalSortOperatorDescriptor externalSortOp = new ExternalSortOperatorDescriptor(spec, 1000, sortFields,
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
-                        PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY) }, outputRecDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, externalSortOp, NC1_ID);
-        return externalSortOp;
-    }
-
-    private IOperatorDescriptor createBinaryTokenizerOp(JobSpecification spec, int[] tokenFields, int[] keyFields) {
-        BinaryTokenizerOperatorDescriptor binaryTokenizer = new BinaryTokenizerOperatorDescriptor(spec,
-                tokenizerRecDesc, tokenizerFactory, tokenFields, keyFields);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, binaryTokenizer, NC1_ID);
-        return binaryTokenizer;
-    }
-
-    private IOperatorDescriptor createInvertedIndexBulkLoadOp(JobSpecification spec, int[] fieldPermutation) {
-        InvertedIndexBulkLoadOperatorDescriptor invIndexBulkLoadOp = new InvertedIndexBulkLoadOperatorDescriptor(spec,
-                fieldPermutation, storageManager, btreeFileSplitProvider, invListsFileSplitProvider,
-                indexRegistryProvider, tokenTypeTraits, tokenComparatorFactories, invListsTypeTraits,
-                invListsComparatorFactories, tokenizerFactory, btreeDataflowHelperFactory,
-                NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, invIndexBulkLoadOp, NC1_ID);
-        return invIndexBulkLoadOp;
-    }
-
-    public void createInvertedIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        InvertedIndexCreateOperatorDescriptor invIndexCreateOp = new InvertedIndexCreateOperatorDescriptor(spec,
-                storageManager, btreeFileSplitProvider, invListsFileSplitProvider, indexRegistryProvider,
-                tokenTypeTraits, tokenComparatorFactories, invListsTypeTraits, invListsComparatorFactories,
-                tokenizerFactory, btreeDataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, invIndexCreateOp, NC1_ID);
-        spec.addRoot(invIndexCreateOp);
-        runTest(spec);
-    }
-
-    public void loadInvertedIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        IOperatorDescriptor keyProviderOp = createScanKeyProviderOp(spec);
-        IOperatorDescriptor primaryScanOp = createPrimaryScanOp(spec);
-        int[] tokenFields = { 1 };
-        int[] keyFields = { 0 };
-        IOperatorDescriptor binaryTokenizerOp = createBinaryTokenizerOp(spec, tokenFields, keyFields);
-        int[] sortFields = { 0, 1 };
-        IOperatorDescriptor externalSortOp = createExternalSortOp(spec, sortFields, tokenizerRecDesc);
-        int[] fieldPermutation = { 0, 1 };
-        IOperatorDescriptor invIndexBulkLoadOp = createInvertedIndexBulkLoadOp(spec, fieldPermutation);
-        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryScanOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), primaryScanOp, 0, binaryTokenizerOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), binaryTokenizerOp, 0, externalSortOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), externalSortOp, 0, invIndexBulkLoadOp, 0);
-        spec.addRoot(invIndexBulkLoadOp);
-        runTest(spec);
-    }
-
-    private IOperatorDescriptor createQueryProviderOp(JobSpecification spec, String queryString)
-            throws HyracksDataException {
-        // Build tuple with exactly one field, which is the query,
-        ArrayTupleBuilder tb = new ArrayTupleBuilder(1);
-        DataOutput dos = tb.getDataOutput();
-        tb.reset();
-        UTF8StringSerializerDeserializer.INSTANCE.serialize(queryString, dos);
-        tb.addFieldEndOffset();
-        ISerializerDeserializer[] querySerde = { UTF8StringSerializerDeserializer.INSTANCE };
-        RecordDescriptor queryRecDesc = new RecordDescriptor(querySerde);
-        ConstantTupleSourceOperatorDescriptor queryProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
-                queryRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, queryProviderOp, NC1_ID);
-        return queryProviderOp;
-    }
-
-    private IOperatorDescriptor createInvertedIndexSearchOp(JobSpecification spec,
-            IInvertedIndexSearchModifierFactory searchModifierFactory) {
-        InvertedIndexSearchOperatorDescriptor invIndexSearchOp = new InvertedIndexSearchOperatorDescriptor(spec, 0,
-                storageManager, btreeFileSplitProvider, invListsFileSplitProvider, indexRegistryProvider,
-                tokenTypeTraits, tokenComparatorFactories, invListsTypeTraits, invListsComparatorFactories,
-                btreeDataflowHelperFactory, tokenizerFactory, searchModifierFactory, invListsRecDesc, false,
-                NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, invIndexSearchOp, NC1_ID);
-        return invIndexSearchOp;
-    }
-
-    public void searchInvertedIndex(String queryString, IInvertedIndexSearchModifierFactory searchModifierFactory)
-            throws Exception {
-        JobSpecification spec = new JobSpecification();
-        IOperatorDescriptor queryProviderOp = createQueryProviderOp(spec, queryString);
-        IOperatorDescriptor invIndexSearchOp = createInvertedIndexSearchOp(spec, searchModifierFactory);
-
-        ResultSetId rsId = new ResultSetId(1);
-        spec.addResultSetId(rsId);
-
-        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
-                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
-        spec.connect(new OneToOneConnectorDescriptor(spec), queryProviderOp, 0, invIndexSearchOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), invIndexSearchOp, 0, printer, 0);
-        spec.addRoot(printer);
-        runTest(spec);
-    }
-
-    @AfterClass
-    public static void cleanup() throws Exception {
-        File primary = new File(primaryFileName);
-        File btree = new File(btreeFileName);
-        File invLists = new File(invListsFileName);
-        primary.deleteOnExit();
-        btree.deleteOnExit();
-        invLists.deleteOnExit();
-    }
-}
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreePrimaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreePrimaryIndexSearchOperatorTest.java
deleted file mode 100644
index 92b6e14..0000000
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreePrimaryIndexSearchOperatorTest.java
+++ /dev/null
@@ -1,214 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.tests.rtree;
-
-import java.io.DataOutput;
-import java.io.File;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-
-import org.junit.AfterClass;
-import org.junit.Before;
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.dataset.ResultSetId;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.api.job.JobSpecification;
-import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
-import edu.uci.ics.hyracks.data.std.primitive.DoublePointable;
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.DoubleParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.am.rtree.dataflow.RTreeDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.rtree.dataflow.RTreeSearchOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-import edu.uci.ics.hyracks.test.support.TestIndexRegistryProvider;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
-import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
-import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
-
-public class RTreePrimaryIndexSearchOperatorTest extends AbstractIntegrationTest {
-    static {
-        TestStorageManagerComponentHolder.init(8192, 20, 20);
-    }
-
-    private IStorageManagerInterface storageManager = new TestStorageManagerInterface();
-    private IIndexRegistryProvider<IIndex> indexRegistryProvider = new TestIndexRegistryProvider();
-    private IIndexDataflowHelperFactory dataflowHelperFactory;
-
-    private final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
-    private final static String sep = System.getProperty("file.separator");
-
-    // field, type and key declarations for primary R-tree index
-    private int primaryFieldCount = 5;
-    private int primaryKeyFieldCount = 4;
-    private ITypeTraits[] primaryTypeTraits = new ITypeTraits[primaryFieldCount];
-    private IBinaryComparatorFactory[] primaryComparatorFactories = new IBinaryComparatorFactory[primaryKeyFieldCount];
-
-    private RecordDescriptor primaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-            DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-            DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-            UTF8StringSerializerDeserializer.INSTANCE });
-
-    private static String primaryRTreeName = "primary" + simpleDateFormat.format(new Date());
-    private static String primaryFileName = System.getProperty("java.io.tmpdir") + sep + primaryRTreeName;
-
-    private IFileSplitProvider primaryRTreeSplitProvider = new ConstantFileSplitProvider(
-            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(primaryFileName))) });
-
-    private IPrimitiveValueProviderFactory[] primaryValueProviderFactories;
-    
-    @Before
-    public void setup() throws Exception {
-        // field, type and key declarations for primary R-tree index
-        primaryTypeTraits[0] = DoublePointable.TYPE_TRAITS;
-        primaryTypeTraits[1] = DoublePointable.TYPE_TRAITS;
-        primaryTypeTraits[2] = DoublePointable.TYPE_TRAITS;
-        primaryTypeTraits[3] = DoublePointable.TYPE_TRAITS;
-        primaryTypeTraits[4] = UTF8StringPointable.TYPE_TRAITS;
-        primaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(DoublePointable.FACTORY);
-        primaryComparatorFactories[1] = primaryComparatorFactories[0];
-        primaryComparatorFactories[2] = primaryComparatorFactories[0];
-        primaryComparatorFactories[3] = primaryComparatorFactories[0];
-
-        primaryValueProviderFactories = RTreeUtils
-                .createPrimitiveValueProviderFactories(primaryComparatorFactories.length, DoublePointable.FACTORY);
-        dataflowHelperFactory = new RTreeDataflowHelperFactory(primaryValueProviderFactories);
-        
-        createPrimaryIndex();
-        loadPrimaryIndexTest();
-    }
-
-    public void createPrimaryIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, primaryRTreeSplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
-        spec.addRoot(primaryCreateOp);
-        runTest(spec);
-    }
-    
-    public void loadPrimaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        FileSplit[] objectsSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
-                "data/spatial.txt"))) };
-        IFileSplitProvider objectsSplitProvider = new ConstantFileSplitProvider(objectsSplits);
-        RecordDescriptor objectsDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE });
-
-        FileScanOperatorDescriptor objScanner = new FileScanOperatorDescriptor(spec, objectsSplitProvider,
-                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { DoubleParserFactory.INSTANCE,
-                        DoubleParserFactory.INSTANCE, DoubleParserFactory.INSTANCE, DoubleParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE }, '|'), objectsDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, objScanner, NC1_ID);
-
-        int[] fieldPermutation = { 0, 1, 2, 3, 4 };
-        TreeIndexBulkLoadOperatorDescriptor primaryRTreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, primaryRTreeSplitProvider, primaryTypeTraits, primaryComparatorFactories, fieldPermutation, 0.7f,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryRTreeBulkLoad, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), objScanner, 0, primaryRTreeBulkLoad, 0);
-
-        spec.addRoot(primaryRTreeBulkLoad);
-        runTest(spec);
-    }
-
-    @Test
-    public void searchPrimaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        // build tuple
-        ArrayTupleBuilder tb = new ArrayTupleBuilder(primaryKeyFieldCount);
-        DataOutput dos = tb.getDataOutput();
-
-        tb.reset();
-        DoubleSerializerDeserializer.INSTANCE.serialize(61.2894, dos);
-        tb.addFieldEndOffset();
-        DoubleSerializerDeserializer.INSTANCE.serialize(-149.624, dos);
-        tb.addFieldEndOffset();
-        DoubleSerializerDeserializer.INSTANCE.serialize(61.8894, dos);
-        tb.addFieldEndOffset();
-        DoubleSerializerDeserializer.INSTANCE.serialize(-149.024, dos);
-        tb.addFieldEndOffset();
-
-        ISerializerDeserializer[] keyRecDescSers = { DoubleSerializerDeserializer.INSTANCE,
-                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-                DoubleSerializerDeserializer.INSTANCE };
-        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
-
-        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
-                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
-
-        int[] keyFields = { 0, 1, 2, 3 };
-
-        RTreeSearchOperatorDescriptor primaryRTreeSearchOp = new RTreeSearchOperatorDescriptor(spec, primaryRecDesc,
-                storageManager, indexRegistryProvider, primaryRTreeSplitProvider, primaryTypeTraits, primaryComparatorFactories, keyFields,
-                dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryRTreeSearchOp, NC1_ID);
-
-        ResultSetId rsId = new ResultSetId(1);
-        spec.addResultSetId(rsId);
-
-        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
-                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryRTreeSearchOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), primaryRTreeSearchOp, 0, printer, 0);
-
-        spec.addRoot(printer);
-        runTest(spec);
-    }
-
-    @AfterClass
-    public static void cleanup() throws Exception {
-        File primary = new File(primaryFileName);
-        primary.deleteOnExit();
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreePrimaryIndexStatsOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreePrimaryIndexStatsOperatorTest.java
deleted file mode 100644
index 2a00394..0000000
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreePrimaryIndexStatsOperatorTest.java
+++ /dev/null
@@ -1,198 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.tests.rtree;
-
-import java.io.File;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-
-import org.junit.AfterClass;
-import org.junit.Before;
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.dataset.ResultSetId;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.api.job.JobSpecification;
-import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
-import edu.uci.ics.hyracks.data.std.primitive.DoublePointable;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.DoubleParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexStatsOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.am.rtree.dataflow.RTreeDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreeNSMInteriorFrameFactory;
-import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreeNSMLeafFrameFactory;
-import edu.uci.ics.hyracks.storage.am.rtree.tuples.RTreeTypeAwareTupleWriterFactory;
-import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-import edu.uci.ics.hyracks.test.support.TestIndexRegistryProvider;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
-import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
-import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
-
-public class RTreePrimaryIndexStatsOperatorTest extends AbstractIntegrationTest {
-    static {
-        TestStorageManagerComponentHolder.init(8192, 20, 20);
-    }
-
-    private IStorageManagerInterface storageManager = new TestStorageManagerInterface();
-    private IIndexRegistryProvider<IIndex> indexRegistryProvider = new TestIndexRegistryProvider();
-    private IIndexDataflowHelperFactory dataflowHelperFactory;
-
-    private final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
-    private final static String sep = System.getProperty("file.separator");
-
-    // field, type and key declarations for primary R-tree index
-    private int primaryFieldCount = 5;
-    private int primaryKeyFieldCount = 4;
-    private ITypeTraits[] primaryTypeTraits = new ITypeTraits[primaryFieldCount];
-    private IBinaryComparatorFactory[] primaryComparatorFactories = new IBinaryComparatorFactory[primaryKeyFieldCount];
-
-    private RTreeTypeAwareTupleWriterFactory primaryTupleWriterFactory = new RTreeTypeAwareTupleWriterFactory(
-            primaryTypeTraits);
-
-    private RecordDescriptor primaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-            DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-            DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-            UTF8StringSerializerDeserializer.INSTANCE });
-
-    private ITreeIndexFrameFactory primaryInteriorFrameFactory;
-    private ITreeIndexFrameFactory primaryLeafFrameFactory;
-
-    private static String primaryRTreeName = "primary" + simpleDateFormat.format(new Date());
-    private static String primaryFileName = System.getProperty("java.io.tmpdir") + sep + primaryRTreeName;
-
-    private IFileSplitProvider primaryRTreeSplitProvider = new ConstantFileSplitProvider(
-            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(primaryFileName))) });
-
-    private IPrimitiveValueProviderFactory[] primaryValueProviderFactories;
-    
-    @Before
-    public void setup() throws Exception {
-        // field, type and key declarations for primary R-tree index
-        primaryTypeTraits[0] = DoublePointable.TYPE_TRAITS;
-        primaryTypeTraits[1] = DoublePointable.TYPE_TRAITS;
-        primaryTypeTraits[2] = DoublePointable.TYPE_TRAITS;
-        primaryTypeTraits[3] = DoublePointable.TYPE_TRAITS;
-        primaryTypeTraits[4] = DoublePointable.TYPE_TRAITS;
-        primaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(DoublePointable.FACTORY);
-        primaryComparatorFactories[1] = primaryComparatorFactories[0];
-        primaryComparatorFactories[2] = primaryComparatorFactories[0];
-        primaryComparatorFactories[3] = primaryComparatorFactories[0];
-
-        primaryValueProviderFactories = RTreeUtils
-                .createPrimitiveValueProviderFactories(primaryComparatorFactories.length, DoublePointable.FACTORY);
-        dataflowHelperFactory = new RTreeDataflowHelperFactory(primaryValueProviderFactories);
-        
-        primaryInteriorFrameFactory = new RTreeNSMInteriorFrameFactory(primaryTupleWriterFactory,
-                primaryValueProviderFactories);
-        primaryLeafFrameFactory = new RTreeNSMLeafFrameFactory(primaryTupleWriterFactory, primaryValueProviderFactories);
-
-        createPrimaryIndex();
-        loadPrimaryIndexTest();
-    }
-
-    public void createPrimaryIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, primaryRTreeSplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
-        spec.addRoot(primaryCreateOp);
-        runTest(spec);
-    }
-    
-    public void loadPrimaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        FileSplit[] objectsSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
-                "data/spatial.txt"))) };
-        IFileSplitProvider objectsSplitProvider = new ConstantFileSplitProvider(objectsSplits);
-        RecordDescriptor objectsDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE });
-
-        FileScanOperatorDescriptor objScanner = new FileScanOperatorDescriptor(spec, objectsSplitProvider,
-                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { DoubleParserFactory.INSTANCE,
-                        DoubleParserFactory.INSTANCE, DoubleParserFactory.INSTANCE, DoubleParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE }, '|'), objectsDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, objScanner, NC1_ID);
-
-        int[] fieldPermutation = { 0, 1, 2, 3, 4 };
-        TreeIndexBulkLoadOperatorDescriptor primaryRTreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, primaryRTreeSplitProvider, primaryTypeTraits, primaryComparatorFactories, fieldPermutation, 0.7f,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryRTreeBulkLoad, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), objScanner, 0, primaryRTreeBulkLoad, 0);
-
-        spec.addRoot(primaryRTreeBulkLoad);
-        runTest(spec);
-    }
-
-    @Test
-    public void showPrimaryIndexStats() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        TreeIndexStatsOperatorDescriptor primaryStatsOp = new TreeIndexStatsOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, primaryRTreeSplitProvider, 
-                primaryTypeTraits, primaryComparatorFactories, dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryStatsOp, NC1_ID);
-
-        ResultSetId rsId = new ResultSetId(1);
-        spec.addResultSetId(rsId);
-
-        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
-                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), primaryStatsOp, 0, printer, 0);
-        spec.addRoot(printer);
-        runTest(spec);
-    }
-
-    @AfterClass
-    public static void cleanup() throws Exception {
-        File primary = new File(primaryFileName);
-        primary.deleteOnExit();
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreeSecondaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreeSecondaryIndexSearchOperatorTest.java
deleted file mode 100644
index 1d86037..0000000
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreeSecondaryIndexSearchOperatorTest.java
+++ /dev/null
@@ -1,324 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.tests.rtree;
-
-import java.io.DataOutput;
-import java.io.File;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-
-import org.junit.AfterClass;
-import org.junit.Before;
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.dataset.ResultSetId;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.api.job.JobSpecification;
-import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
-import edu.uci.ics.hyracks.data.std.primitive.DoublePointable;
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.DoubleParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
-import edu.uci.ics.hyracks.dataflow.common.data.parsers.UTF8StringParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.am.rtree.dataflow.RTreeDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.rtree.dataflow.RTreeSearchOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-import edu.uci.ics.hyracks.test.support.TestIndexRegistryProvider;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
-import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
-import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
-
-public class RTreeSecondaryIndexSearchOperatorTest extends AbstractIntegrationTest {
-    static {
-        TestStorageManagerComponentHolder.init(8192, 20, 20);
-    }
-
-    private IStorageManagerInterface storageManager = new TestStorageManagerInterface();
-    private IIndexRegistryProvider<IIndex> indexRegistryProvider = new TestIndexRegistryProvider();
-    private IIndexDataflowHelperFactory dataflowHelperFactory;
-    private IIndexDataflowHelperFactory btreeDataflowHelperFactory = new BTreeDataflowHelperFactory();
-
-    private final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
-    private final static String sep = System.getProperty("file.separator");
-
-    // field, type and key declarations for primary B-tree index
-    private int primaryBTreeFieldCount = 10;
-    private ITypeTraits[] primaryBTreeTypeTraits = new ITypeTraits[primaryBTreeFieldCount];
-    private int primaryBTreeKeyFieldCount = 1;
-    private IBinaryComparatorFactory[] primaryBTreeComparatorFactories = new IBinaryComparatorFactory[primaryBTreeKeyFieldCount];
-
-    private static String primaryBTreeName = "primaryBTree" + simpleDateFormat.format(new Date());
-    private static String primaryBTreeFileName = System.getProperty("java.io.tmpdir") + sep + primaryBTreeName;
-
-    private IFileSplitProvider primaryBTreeSplitProvider = new ConstantFileSplitProvider(
-            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(primaryBTreeFileName))) });
-
-    private RecordDescriptor primaryBTreeRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-            DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-            DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE, });
-
-    // field, type and key declarations for secondary indexes
-    private int secondaryFieldCount = 5;
-    private ITypeTraits[] secondaryTypeTraits = new ITypeTraits[secondaryFieldCount];
-    private int secondaryKeyFieldCount = 4;
-    private IBinaryComparatorFactory[] secondaryComparatorFactories = new IBinaryComparatorFactory[secondaryKeyFieldCount];
-
-    private static String secondaryRTreeName = "secondary" + simpleDateFormat.format(new Date());
-    private static String secondaryFileName = System.getProperty("java.io.tmpdir") + sep + secondaryRTreeName;
-
-    private IFileSplitProvider secondaryRTreeSplitProvider = new ConstantFileSplitProvider(
-            new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(secondaryFileName))) });
-
-    private RecordDescriptor secondaryRecDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-            DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-            DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-            UTF8StringSerializerDeserializer.INSTANCE });
-
-    private IPrimitiveValueProviderFactory[] secondaryValueProviderFactories;
-    
-    @Before
-    public void setup() throws Exception {
-        // field, type and key declarations for primary B-tree index
-        primaryBTreeTypeTraits[0] = UTF8StringPointable.TYPE_TRAITS;
-        primaryBTreeTypeTraits[1] = UTF8StringPointable.TYPE_TRAITS;
-        primaryBTreeTypeTraits[2] = UTF8StringPointable.TYPE_TRAITS;
-        primaryBTreeTypeTraits[3] = UTF8StringPointable.TYPE_TRAITS;
-        primaryBTreeTypeTraits[4] = UTF8StringPointable.TYPE_TRAITS;
-        primaryBTreeTypeTraits[5] = UTF8StringPointable.TYPE_TRAITS;
-        primaryBTreeTypeTraits[6] = DoublePointable.TYPE_TRAITS;
-        primaryBTreeTypeTraits[7] = DoublePointable.TYPE_TRAITS;
-        primaryBTreeTypeTraits[8] = DoublePointable.TYPE_TRAITS;
-        primaryBTreeTypeTraits[9] = DoublePointable.TYPE_TRAITS;
-        primaryBTreeComparatorFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
-
-        // field, type and key declarations for secondary indexes
-        secondaryTypeTraits[0] = DoublePointable.TYPE_TRAITS;
-        secondaryTypeTraits[1] = DoublePointable.TYPE_TRAITS;
-        secondaryTypeTraits[2] = DoublePointable.TYPE_TRAITS;
-        secondaryTypeTraits[3] = DoublePointable.TYPE_TRAITS;
-        secondaryTypeTraits[4] = UTF8StringPointable.TYPE_TRAITS;
-        secondaryComparatorFactories[0] = PointableBinaryComparatorFactory.of(DoublePointable.FACTORY);
-        secondaryComparatorFactories[1] = secondaryComparatorFactories[0];
-        secondaryComparatorFactories[2] = secondaryComparatorFactories[0];
-        secondaryComparatorFactories[3] = secondaryComparatorFactories[0];
-
-        secondaryValueProviderFactories = RTreeUtils
-                .createPrimitiveValueProviderFactories(secondaryComparatorFactories.length, DoublePointable.FACTORY);
-
-        dataflowHelperFactory = new RTreeDataflowHelperFactory(secondaryValueProviderFactories);
-        
-        createPrimaryIndex();
-        loadPrimaryBTreeIndexTest();
-        createSecondaryIndex();
-        loadSecondaryIndexTest();
-    }
-
-    public void createPrimaryIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, primaryBTreeSplitProvider, primaryBTreeTypeTraits,
-                primaryBTreeComparatorFactories, btreeDataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
-        spec.addRoot(primaryCreateOp);
-        runTest(spec);
-    }
-    
-    public void loadPrimaryBTreeIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        FileSplit[] ordersSplits = new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(
-                "data/orders-with-locations.txt"))) };
-        IFileSplitProvider ordersSplitProvider = new ConstantFileSplitProvider(ordersSplits);
-        RecordDescriptor ordersDesc = new RecordDescriptor(new ISerializerDeserializer[] {
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-                DoubleSerializerDeserializer.INSTANCE });
-
-        FileScanOperatorDescriptor ordScanner = new FileScanOperatorDescriptor(spec, ordersSplitProvider,
-                new DelimitedDataTupleParserFactory(new IValueParserFactory[] { UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
-                        DoubleParserFactory.INSTANCE, DoubleParserFactory.INSTANCE, DoubleParserFactory.INSTANCE,
-                        DoubleParserFactory.INSTANCE }, '|'), ordersDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, ordScanner, NC1_ID);
-
-        ExternalSortOperatorDescriptor sorter = new ExternalSortOperatorDescriptor(spec, 1000, new int[] { 0 },
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
-                ordersDesc);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID);
-
-        int[] fieldPermutation = { 0, 1, 2, 4, 5, 7, 9, 10, 11, 12 };
-        TreeIndexBulkLoadOperatorDescriptor primaryBTreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, primaryBTreeSplitProvider, primaryBTreeTypeTraits, primaryBTreeComparatorFactories,
-                fieldPermutation, 0.7f, btreeDataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBTreeBulkLoad, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), sorter, 0, primaryBTreeBulkLoad, 0);
-
-        spec.addRoot(primaryBTreeBulkLoad);
-        runTest(spec);
-    }
-
-    public void createSecondaryIndex() throws Exception {
-        JobSpecification spec = new JobSpecification();
-        TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, secondaryRTreeSplitProvider, secondaryTypeTraits, secondaryComparatorFactories,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
-        spec.addRoot(primaryCreateOp);
-        runTest(spec);
-    }
-    
-    public void loadSecondaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        // build dummy tuple containing nothing
-        ArrayTupleBuilder tb = new ArrayTupleBuilder(primaryBTreeKeyFieldCount * 2);
-        DataOutput dos = tb.getDataOutput();
-
-        tb.reset();
-        UTF8StringSerializerDeserializer.INSTANCE.serialize("0", dos);
-        tb.addFieldEndOffset();
-
-        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
-                UTF8StringSerializerDeserializer.INSTANCE };
-        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
-
-        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
-                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
-
-        int[] lowKeyFields = null; // - infinity
-        int[] highKeyFields = null; // + infinity
-
-        // scan primary index
-        BTreeSearchOperatorDescriptor primaryBTreeSearchOp = new BTreeSearchOperatorDescriptor(spec,
-                primaryBTreeRecDesc, storageManager, indexRegistryProvider, primaryBTreeSplitProvider,
-                primaryBTreeTypeTraits, primaryBTreeComparatorFactories, lowKeyFields, highKeyFields, 
-                true, true, btreeDataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBTreeSearchOp, NC1_ID);
-
-        // load secondary index
-        int[] fieldPermutation = { 6, 7, 8, 9, 0 };
-        TreeIndexBulkLoadOperatorDescriptor secondaryRTreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, secondaryRTreeSplitProvider, secondaryTypeTraits, secondaryComparatorFactories, fieldPermutation, 0.7f,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryRTreeBulkLoad, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryBTreeSearchOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBTreeSearchOp, 0, secondaryRTreeBulkLoad, 0);
-
-        spec.addRoot(secondaryRTreeBulkLoad);
-        runTest(spec);
-    }
-
-    @Test
-    public void searchSecondaryIndexTest() throws Exception {
-        JobSpecification spec = new JobSpecification();
-
-        // build tuple
-        ArrayTupleBuilder tb = new ArrayTupleBuilder(secondaryKeyFieldCount);
-        DataOutput dos = tb.getDataOutput();
-
-        tb.reset();
-        DoubleSerializerDeserializer.INSTANCE.serialize(61.2894, dos);
-        tb.addFieldEndOffset();
-        DoubleSerializerDeserializer.INSTANCE.serialize(-149.624, dos);
-        tb.addFieldEndOffset();
-        DoubleSerializerDeserializer.INSTANCE.serialize(61.8894, dos);
-        tb.addFieldEndOffset();
-        DoubleSerializerDeserializer.INSTANCE.serialize(-149.024, dos);
-        tb.addFieldEndOffset();
-
-        ISerializerDeserializer[] keyRecDescSers = { DoubleSerializerDeserializer.INSTANCE,
-                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
-                DoubleSerializerDeserializer.INSTANCE };
-        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);
-
-        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
-                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);
-
-        int[] keyFields = { 0, 1, 2, 3 };
-
-        RTreeSearchOperatorDescriptor secondaryRTreeSearchOp = new RTreeSearchOperatorDescriptor(spec,
-                secondaryRecDesc, storageManager, indexRegistryProvider, secondaryRTreeSplitProvider,
-                secondaryTypeTraits, secondaryComparatorFactories, keyFields, dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryRTreeSearchOp, NC1_ID);
-
-        ResultSetId rsId = new ResultSetId(1);
-        spec.addResultSetId(rsId);
-
-        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
-                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
-
-        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, secondaryRTreeSearchOp, 0);
-        spec.connect(new OneToOneConnectorDescriptor(spec), secondaryRTreeSearchOp, 0, printer, 0);
-
-        spec.addRoot(printer);
-        runTest(spec);
-    }
-
-    @AfterClass
-    public static void cleanup() throws Exception {
-        File primaryBTree = new File(primaryBTreeFileName);
-        primaryBTree.deleteOnExit();
-
-        File secondary = new File(secondaryFileName);
-        secondary.deleteOnExit();
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/pom.xml b/hyracks/hyracks-examples/pom.xml
index 541220a..a47cb9c 100644
--- a/hyracks/hyracks-examples/pom.xml
+++ b/hyracks/hyracks-examples/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-examples/text-example/pom.xml b/hyracks/hyracks-examples/text-example/pom.xml
index a183835..ee75f31 100644
--- a/hyracks/hyracks-examples/text-example/pom.xml
+++ b/hyracks/hyracks-examples/text-example/pom.xml
@@ -1,6 +1,5 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks.examples</groupId>
   <artifactId>text-example</artifactId>
   <packaging>pom</packaging>
   <name>text-example</name>
@@ -8,12 +7,12 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-examples</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <modules>
     <module>texthelper</module>
     <module>textclient</module>
-    <module>textapp</module>
+    <module>textserver</module>
   </modules>
 </project>
diff --git a/hyracks/hyracks-examples/text-example/textapp/pom.xml b/hyracks/hyracks-examples/text-example/textapp/pom.xml
deleted file mode 100644
index 5927e83..0000000
--- a/hyracks/hyracks-examples/text-example/textapp/pom.xml
+++ /dev/null
@@ -1,187 +0,0 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks.examples.text</groupId>
-  <artifactId>textapp</artifactId>
-  <name>textapp</name>
-
-  <parent>
-    <groupId>edu.uci.ics.hyracks.examples</groupId>
-    <artifactId>text-example</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
-  </parent>
-
-  <build>
-    <pluginManagement>
-      <plugins>
-        <plugin>
-          <groupId>org.eclipse.m2e</groupId>
-          <artifactId>lifecycle-mapping</artifactId>
-          <version>1.0.0</version>
-          <configuration>
-            <lifecycleMappingMetadata>
-              <pluginExecutions>
-                <pluginExecution>
-                  <pluginExecutionFilter>
-                    <groupId>org.apache.maven.plugins</groupId>
-                    <artifactId>maven-dependency-plugin</artifactId>
-                    <versionRange>[1.0.0,)</versionRange>
-                    <goals>
-                      <goal>copy-dependencies</goal>
-                    </goals>
-                  </pluginExecutionFilter>
-                  <action>
-                    <ignore />
-                  </action>
-                </pluginExecution>
-              </pluginExecutions>
-            </lifecycleMappingMetadata>
-          </configuration>
-        </plugin>
-      </plugins>
-	</pluginManagement>
-  
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-dependency-plugin</artifactId>
-        <executions>
-          <execution>
-            <id>copy-dependencies</id>
-            <phase>package</phase>
-            <goals>
-              <goal>copy-dependencies</goal>
-            </goals>
-            <configuration>
-              <outputDirectory>target/application/lib</outputDirectory>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
-      <plugin>
-        <artifactId>maven-assembly-plugin</artifactId>
-        <version>2.2-beta-5</version>
-        <executions>
-          <execution>
-            <configuration>
-              <descriptors>
-                <descriptor>src/main/assembly/app-assembly.xml</descriptor>
-              </descriptors>
-            </configuration>
-            <phase>package</phase>
-            <goals>
-              <goal>attached</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
-      <plugin>
-      	<groupId>edu.uci.ics.hyracks</groupId>
-      	<artifactId>hyracks-virtualcluster-maven-plugin</artifactId>
-      	<version>0.2.4-SNAPSHOT</version>
-        <configuration>
-          <hyracksServerHome>${basedir}/../../../hyracks-server/target/hyracks-server-${project.version}-binary-assembly</hyracksServerHome>
-          <hyracksCLIHome>${basedir}/../../../hyracks-cli/target/hyracks-cli-${project.version}-binary-assembly</hyracksCLIHome>
-          <jvmOptions>${jvm.extraargs}</jvmOptions>
-        </configuration>
-        <executions>
-          <execution>
-            <id>hyracks-cc-start</id>
-            <phase>pre-integration-test</phase>
-            <goals>
-              <goal>start-cc</goal>
-            </goals>
-          </execution>
-          <execution>
-            <id>hyracks-nc1-start</id>
-            <phase>pre-integration-test</phase>
-            <goals>
-              <goal>start-nc</goal>
-            </goals>
-            <configuration>
-              <nodeId>NC1</nodeId>
-              <dataIpAddress>127.0.0.1</dataIpAddress>
-              <ccHost>localhost</ccHost>
-            </configuration>
-          </execution>
-          <execution>
-            <id>hyracks-nc2-start</id>
-            <phase>pre-integration-test</phase>
-            <goals>
-              <goal>start-nc</goal>
-            </goals>
-            <configuration>
-              <nodeId>NC2</nodeId>
-              <dataIpAddress>127.0.0.1</dataIpAddress>
-              <ccHost>localhost</ccHost>
-            </configuration>
-          </execution>
-          <execution>
-            <id>deploy-app</id>
-            <phase>pre-integration-test</phase>
-            <goals>
-              <goal>deploy-app</goal>
-            </goals>
-            <configuration>
-              <ccHost>localhost</ccHost>
-              <appName>text</appName>
-              <harFile>${project.build.directory}/textapp-${project.version}-app-assembly.zip</harFile>
-            </configuration>
-          </execution>
-          <execution>
-            <id>stop-services</id>
-            <phase>post-integration-test</phase>
-            <goals>
-              <goal>stop-services</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
-      <plugin>
-      	<groupId>org.apache.maven.plugins</groupId>
-      	<artifactId>maven-compiler-plugin</artifactId>
-      	<version>2.0.2</version>
-        <configuration>
-          <source>1.7</source>
-          <target>1.7</target>
-          <fork>true</fork>
-        </configuration>
-      </plugin>
-      <plugin>
-      	<groupId>org.apache.maven.plugins</groupId>
-      	<artifactId>maven-failsafe-plugin</artifactId>
-      	<version>2.8.1</version>
-      	<executions>
-      	  <execution>
-      	    <id>it</id>
-      	    <phase>integration-test</phase>
-      	    <goals>
-      	      <goal>integration-test</goal>
-      	    </goals>
-      	  </execution>
-      	</executions>
-      </plugin>
-    </plugins>
-  </build>
-  <dependencies>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks.examples.text</groupId>
-  		<artifactId>texthelper</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<scope>compile</scope>
-  	</dependency>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks.examples.text</groupId>
-  		<artifactId>textclient</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>test</scope>
-  	</dependency>
-  	<dependency>
-  		<groupId>junit</groupId>
-  		<artifactId>junit</artifactId>
-  		<version>4.8.2</version>
-  		<type>jar</type>
-  		<scope>test</scope>
-  	</dependency>
-  </dependencies>
-</project>
diff --git a/hyracks/hyracks-examples/text-example/textapp/src/main/assembly/app-assembly.xml b/hyracks/hyracks-examples/text-example/textapp/src/main/assembly/app-assembly.xml
deleted file mode 100644
index 43ace6c..0000000
--- a/hyracks/hyracks-examples/text-example/textapp/src/main/assembly/app-assembly.xml
+++ /dev/null
@@ -1,13 +0,0 @@
-<assembly>
-  <id>app-assembly</id>
-  <formats>
-    <format>zip</format>
-  </formats>
-  <includeBaseDirectory>false</includeBaseDirectory>
-  <fileSets>
-    <fileSet>
-      <directory>target/application/lib</directory>
-      <outputDirectory>lib</outputDirectory>
-    </fileSet>
-  </fileSets>
-</assembly>
diff --git a/hyracks/hyracks-examples/text-example/textapp/src/test/java/edu/uci/ics/hyracks/examples/text/test/WordCountIT.java b/hyracks/hyracks-examples/text-example/textapp/src/test/java/edu/uci/ics/hyracks/examples/text/test/WordCountIT.java
deleted file mode 100644
index 9659288..0000000
--- a/hyracks/hyracks-examples/text-example/textapp/src/test/java/edu/uci/ics/hyracks/examples/text/test/WordCountIT.java
+++ /dev/null
@@ -1,25 +0,0 @@
-package edu.uci.ics.hyracks.examples.text.test;
-
-import java.io.File;
-
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.examples.text.client.WordCountMain;
-
-public class WordCountIT {
-    @Test
-    public void runWordCount() throws Exception {
-        WordCountMain.main(new String[] { "-host", "localhost", "-infile-splits", getInfileSplits(), "-outfile-splits",
-                getOutfileSplits(), "-algo", "-hash", "-app", "text" });
-    }
-
-    private String getInfileSplits() {
-        return "NC1:" + new File("data/file1.txt").getAbsolutePath() + ",NC2:"
-                + new File("data/file2.txt").getAbsolutePath();
-    }
-
-    private String getOutfileSplits() {
-        return "NC1:" + new File("target/wc1.txt").getAbsolutePath() + ",NC2:"
-                + new File("target/wc2.txt").getAbsolutePath();
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/text-example/textclient/pom.xml b/hyracks/hyracks-examples/text-example/textclient/pom.xml
index 633f480..7bf1c44 100644
--- a/hyracks/hyracks-examples/text-example/textclient/pom.xml
+++ b/hyracks/hyracks-examples/text-example/textclient/pom.xml
@@ -1,26 +1,25 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks.examples.text</groupId>
   <artifactId>textclient</artifactId>
   <name>textclient</name>
 
   <parent>
-    <groupId>edu.uci.ics.hyracks.examples</groupId>
+    <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>text-example</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
-  		<groupId>edu.uci.ics.hyracks.examples.text</groupId>
+  		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>texthelper</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-examples/text-example/textclient/src/main/java/edu/uci/ics/hyracks/examples/text/client/ExternalGroupClient.java b/hyracks/hyracks-examples/text-example/textclient/src/main/java/edu/uci/ics/hyracks/examples/text/client/ExternalGroupClient.java
index 943f232..18813a7 100644
--- a/hyracks/hyracks-examples/text-example/textclient/src/main/java/edu/uci/ics/hyracks/examples/text/client/ExternalGroupClient.java
+++ b/hyracks/hyracks-examples/text-example/textclient/src/main/java/edu/uci/ics/hyracks/examples/text/client/ExternalGroupClient.java
@@ -74,9 +74,6 @@
         @Option(name = "-port", usage = "Hyracks Cluster Controller Port (default: 1098)")
         public int port = 1098;
 
-        @Option(name = "-app", usage = "Hyracks Application name", required = true)
-        public String app;
-
         @Option(name = "-infile-splits", usage = "Comma separated list of file-splits for the input. A file-split is <node-name>:<path>", required = true)
         public String inFileSplits;
 
@@ -122,7 +119,7 @@
 
             System.out.print(i + "\t" + (System.currentTimeMillis() - start));
             start = System.currentTimeMillis();
-            JobId jobId = hcc.startJob(options.app, job);
+            JobId jobId = hcc.startJob(job);
             hcc.waitForCompletion(jobId);
             System.out.println("\t" + (System.currentTimeMillis() - start));
         }
diff --git a/hyracks/hyracks-examples/text-example/textclient/src/main/java/edu/uci/ics/hyracks/examples/text/client/WordCountMain.java b/hyracks/hyracks-examples/text-example/textclient/src/main/java/edu/uci/ics/hyracks/examples/text/client/WordCountMain.java
index 31019ab..5b6fad9 100644
--- a/hyracks/hyracks-examples/text-example/textclient/src/main/java/edu/uci/ics/hyracks/examples/text/client/WordCountMain.java
+++ b/hyracks/hyracks-examples/text-example/textclient/src/main/java/edu/uci/ics/hyracks/examples/text/client/WordCountMain.java
@@ -65,9 +65,6 @@
         @Option(name = "-port", usage = "Hyracks Cluster Controller Port (default: 1098)")
         public int port = 1098;
 
-        @Option(name = "-app", usage = "Hyracks Application name", required = true)
-        public String app;
-
         @Option(name = "-infile-splits", usage = "Comma separated list of file-splits for the input. A file-split is <node-name>:<path>", required = true)
         public String inFileSplits;
 
@@ -101,8 +98,8 @@
                 options.algo, options.htSize, options.sbSize, options.format);
 
         long start = System.currentTimeMillis();
-        JobId jobId = hcc.startJob(options.app, job, options.runtimeProfiling ? EnumSet.of(JobFlag.PROFILE_RUNTIME)
-                : EnumSet.noneOf(JobFlag.class));
+        JobId jobId = hcc.startJob(job,
+                options.runtimeProfiling ? EnumSet.of(JobFlag.PROFILE_RUNTIME) : EnumSet.noneOf(JobFlag.class));
         hcc.waitForCompletion(jobId);
         long end = System.currentTimeMillis();
         System.err.println(start + " " + end + " " + (end - start));
diff --git a/hyracks/hyracks-examples/text-example/texthelper/pom.xml b/hyracks/hyracks-examples/text-example/texthelper/pom.xml
index 5cf5da3..c948242 100644
--- a/hyracks/hyracks-examples/text-example/texthelper/pom.xml
+++ b/hyracks/hyracks-examples/text-example/texthelper/pom.xml
@@ -1,32 +1,31 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks.examples.text</groupId>
   <artifactId>texthelper</artifactId>
   <name>texthelper</name>
 
   <parent>
-    <groupId>edu.uci.ics.hyracks.examples</groupId>
+    <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>text-example</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-data-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   	</dependency>
   </dependencies>
   <build>
diff --git a/hyracks/hyracks-examples/text-example/textapp/data/file1.txt b/hyracks/hyracks-examples/text-example/textserver/data/file1.txt
similarity index 100%
rename from hyracks/hyracks-examples/text-example/textapp/data/file1.txt
rename to hyracks/hyracks-examples/text-example/textserver/data/file1.txt
diff --git a/hyracks/hyracks-examples/text-example/textapp/data/file2.txt b/hyracks/hyracks-examples/text-example/textserver/data/file2.txt
similarity index 100%
rename from hyracks/hyracks-examples/text-example/textapp/data/file2.txt
rename to hyracks/hyracks-examples/text-example/textserver/data/file2.txt
diff --git a/hyracks/hyracks-examples/text-example/textserver/pom.xml b/hyracks/hyracks-examples/text-example/textserver/pom.xml
new file mode 100644
index 0000000..d409203
--- /dev/null
+++ b/hyracks/hyracks-examples/text-example/textserver/pom.xml
@@ -0,0 +1,170 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>edu.uci.ics.hyracks.examples.text</groupId>
+  <artifactId>textserver</artifactId>
+  <name>textserver</name>
+
+  <parent>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>text-example</artifactId>
+    <version>0.2.5-SNAPSHOT</version>
+  </parent>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>appassembler-maven-plugin</artifactId>
+        <version>1.3</version>
+        <executions>
+          <execution>
+            <configuration>
+              <programs>
+                <program>
+                  <mainClass>edu.uci.ics.hyracks.control.cc.CCDriver</mainClass>
+                  <name>hyrackscc</name>
+                </program>
+                <program>
+                  <mainClass>edu.uci.ics.hyracks.control.nc.NCDriver</mainClass>
+                  <name>hyracksnc</name>
+                </program>
+              </programs>
+              <repositoryLayout>flat</repositoryLayout>
+              <repositoryName>lib</repositoryName>
+            </configuration>
+            <phase>package</phase>
+            <goals>
+              <goal>assemble</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <artifactId>maven-assembly-plugin</artifactId>
+        <version>2.2-beta-5</version>
+        <executions>
+          <execution>
+            <configuration>
+              <descriptors>
+                <descriptor>src/main/assembly/binary-assembly.xml</descriptor>
+              </descriptors>
+            </configuration>
+            <phase>package</phase>
+            <goals>
+              <goal>attached</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+      	<groupId>edu.uci.ics.hyracks</groupId>
+      	<artifactId>hyracks-virtualcluster-maven-plugin</artifactId>
+      	<version>0.2.5-SNAPSHOT</version>
+        <configuration>
+          <hyracksServerHome>${basedir}/target/textserver-${project.version}-binary-assembly</hyracksServerHome>
+          <jvmOptions>${jvm.extraargs}</jvmOptions>
+        </configuration>
+        <executions>
+          <execution>
+            <id>hyracks-cc-start</id>
+            <phase>pre-integration-test</phase>
+            <goals>
+              <goal>start-cc</goal>
+            </goals>
+          </execution>
+          <execution>
+            <id>hyracks-nc1-start</id>
+            <phase>pre-integration-test</phase>
+            <goals>
+              <goal>start-nc</goal>
+            </goals>
+            <configuration>
+              <nodeId>NC1</nodeId>
+              <dataIpAddress>127.0.0.1</dataIpAddress>
+              <ccHost>localhost</ccHost>
+            </configuration>
+          </execution>
+          <execution>
+            <id>hyracks-nc2-start</id>
+            <phase>pre-integration-test</phase>
+            <goals>
+              <goal>start-nc</goal>
+            </goals>
+            <configuration>
+              <nodeId>NC2</nodeId>
+              <dataIpAddress>127.0.0.1</dataIpAddress>
+              <ccHost>localhost</ccHost>
+            </configuration>
+          </execution>
+          <execution>
+            <id>stop-services</id>
+            <phase>post-integration-test</phase>
+            <goals>
+              <goal>stop-services</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+      	<groupId>org.apache.maven.plugins</groupId>
+      	<artifactId>maven-compiler-plugin</artifactId>
+      	<version>2.0.2</version>
+        <configuration>
+          <source>1.7</source>
+          <target>1.7</target>
+          <fork>true</fork>
+        </configuration>
+      </plugin>
+      <plugin>
+      	<groupId>org.apache.maven.plugins</groupId>
+      	<artifactId>maven-failsafe-plugin</artifactId>
+      	<version>2.8.1</version>
+      	<executions>
+      	  <execution>
+      	    <id>it</id>
+      	    <phase>integration-test</phase>
+      	    <goals>
+      	      <goal>integration-test</goal>
+      	    </goals>
+      	  </execution>
+      	</executions>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>texthelper</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-control-cc</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-control-nc</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>textclient</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>test</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>junit</groupId>
+  		<artifactId>junit</artifactId>
+  		<version>4.8.2</version>
+  		<type>jar</type>
+  		<scope>test</scope>
+  	</dependency>
+  </dependencies>
+</project>
diff --git a/hyracks/hyracks-examples/text-example/textserver/src/main/assembly/binary-assembly.xml b/hyracks/hyracks-examples/text-example/textserver/src/main/assembly/binary-assembly.xml
new file mode 100644
index 0000000..cd598d9
--- /dev/null
+++ b/hyracks/hyracks-examples/text-example/textserver/src/main/assembly/binary-assembly.xml
@@ -0,0 +1,23 @@
+<assembly>
+  <id>binary-assembly</id>
+  <formats>
+    <format>zip</format>
+    <format>dir</format>
+  </formats>
+  <includeBaseDirectory>false</includeBaseDirectory>
+  <fileSets>
+    <fileSet>
+      <directory>target/appassembler/bin</directory>
+      <outputDirectory>bin</outputDirectory>
+      <fileMode>0755</fileMode>
+    </fileSet>
+    <fileSet>
+      <directory>target/appassembler/lib</directory>
+      <outputDirectory>lib</outputDirectory>
+    </fileSet>
+    <fileSet>
+      <directory>docs</directory>
+      <outputDirectory>docs</outputDirectory>
+    </fileSet>
+  </fileSets>
+</assembly>
diff --git a/hyracks/hyracks-examples/text-example/textserver/src/test/java/edu/uci/ics/hyracks/examples/text/test/WordCountIT.java b/hyracks/hyracks-examples/text-example/textserver/src/test/java/edu/uci/ics/hyracks/examples/text/test/WordCountIT.java
new file mode 100644
index 0000000..76af72d
--- /dev/null
+++ b/hyracks/hyracks-examples/text-example/textserver/src/test/java/edu/uci/ics/hyracks/examples/text/test/WordCountIT.java
@@ -0,0 +1,25 @@
+package edu.uci.ics.hyracks.examples.text.test;
+
+import java.io.File;
+
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.examples.text.client.WordCountMain;
+
+public class WordCountIT {
+    @Test
+    public void runWordCount() throws Exception {
+        WordCountMain.main(new String[] { "-host", "localhost", "-infile-splits", getInfileSplits(), "-outfile-splits",
+                getOutfileSplits(), "-algo", "-hash" });
+    }
+
+    private String getInfileSplits() {
+        return "NC1:" + new File("data/file1.txt").getAbsolutePath() + ",NC2:"
+                + new File("data/file2.txt").getAbsolutePath();
+    }
+
+    private String getOutfileSplits() {
+        return "NC1:" + new File("target/wc1.txt").getAbsolutePath() + ",NC2:"
+                + new File("target/wc2.txt").getAbsolutePath();
+    }
+}
diff --git a/hyracks/hyracks-examples/tpch-example/pom.xml b/hyracks/hyracks-examples/tpch-example/pom.xml
index a36efc9..f8acd8d 100644
--- a/hyracks/hyracks-examples/tpch-example/pom.xml
+++ b/hyracks/hyracks-examples/tpch-example/pom.xml
@@ -1,6 +1,5 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks.examples</groupId>
   <artifactId>tpch-example</artifactId>
   <packaging>pom</packaging>
   <name>tpch-example</name>
@@ -8,11 +7,11 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-examples</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <modules>
     <module>tpchclient</module>
-    <module>tpchapp</module>
+    <module>tpchserver</module>
   </modules>
 </project>
diff --git a/hyracks/hyracks-examples/tpch-example/tpchapp/pom.xml b/hyracks/hyracks-examples/tpch-example/tpchapp/pom.xml
deleted file mode 100644
index 89689c2..0000000
--- a/hyracks/hyracks-examples/tpch-example/tpchapp/pom.xml
+++ /dev/null
@@ -1,91 +0,0 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks.examples.tpch</groupId>
-  <artifactId>tpchapp</artifactId>
-  <name>tpchapp</name>
-  <parent>
-    <groupId>edu.uci.ics.hyracks.examples</groupId>
-    <artifactId>tpch-example</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
-  </parent>
-
-  <build>
-    <pluginManagement>
-      <plugins>
-        <plugin>
-          <groupId>org.eclipse.m2e</groupId>
-          <artifactId>lifecycle-mapping</artifactId>
-          <version>1.0.0</version>
-          <configuration>
-            <lifecycleMappingMetadata>
-              <pluginExecutions>
-                <pluginExecution>
-                  <pluginExecutionFilter>
-                    <groupId>org.apache.maven.plugins</groupId>
-                    <artifactId>maven-dependency-plugin</artifactId>
-                    <versionRange>[1.0.0,)</versionRange>
-                    <goals>
-                      <goal>copy-dependencies</goal>
-                    </goals>
-                  </pluginExecutionFilter>
-                  <action>
-                    <ignore />
-                  </action>
-                </pluginExecution>
-              </pluginExecutions>
-            </lifecycleMappingMetadata>
-          </configuration>
-        </plugin>
-      </plugins>
-	</pluginManagement>
-  
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-dependency-plugin</artifactId>
-        <executions>
-          <execution>
-            <id>copy-dependencies</id>
-            <phase>package</phase>
-            <goals>
-              <goal>copy-dependencies</goal>
-            </goals>
-            <configuration>
-              <outputDirectory>target/application/lib</outputDirectory>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
-      <plugin>
-        <artifactId>maven-assembly-plugin</artifactId>
-        <version>2.2-beta-5</version>
-        <executions>
-          <execution>
-            <configuration>
-              <descriptors>
-                <descriptor>src/main/assembly/app-assembly.xml</descriptor>
-              </descriptors>
-            </configuration>
-            <phase>package</phase>
-            <goals>
-              <goal>attached</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
-    </plugins>
-  </build>
-  <dependencies>
-    <dependency>
-        <groupId>edu.uci.ics.hyracks</groupId>
-        <artifactId>hyracks-dataflow-std</artifactId>
-        <version>0.2.4-SNAPSHOT</version>
-        <scope>compile</scope>
-    </dependency>
-    <dependency>
-    	<groupId>edu.uci.ics.hyracks</groupId>
-    	<artifactId>hyracks-data-std</artifactId>
-    	<version>0.2.4-SNAPSHOT</version>
-    </dependency>
-  </dependencies>
-</project>
diff --git a/hyracks/hyracks-examples/tpch-example/tpchapp/src/main/assembly/app-assembly.xml b/hyracks/hyracks-examples/tpch-example/tpchapp/src/main/assembly/app-assembly.xml
deleted file mode 100644
index 43ace6c..0000000
--- a/hyracks/hyracks-examples/tpch-example/tpchapp/src/main/assembly/app-assembly.xml
+++ /dev/null
@@ -1,13 +0,0 @@
-<assembly>
-  <id>app-assembly</id>
-  <formats>
-    <format>zip</format>
-  </formats>
-  <includeBaseDirectory>false</includeBaseDirectory>
-  <fileSets>
-    <fileSet>
-      <directory>target/application/lib</directory>
-      <outputDirectory>lib</outputDirectory>
-    </fileSet>
-  </fileSets>
-</assembly>
diff --git a/hyracks/hyracks-examples/tpch-example/tpchclient/pom.xml b/hyracks/hyracks-examples/tpch-example/tpchclient/pom.xml
index d6f1d17..9f08f0c 100644
--- a/hyracks/hyracks-examples/tpch-example/tpchclient/pom.xml
+++ b/hyracks/hyracks-examples/tpch-example/tpchclient/pom.xml
@@ -1,25 +1,24 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks.examples.tpch</groupId>
   <artifactId>tpchclient</artifactId>
   <name>tpchclient</name>
   <parent>
-    <groupId>edu.uci.ics.hyracks.examples</groupId>
+    <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>tpch-example</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-data-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   	</dependency>
   </dependencies>
   <build>
diff --git a/hyracks/hyracks-examples/tpch-example/tpchclient/src/main/java/edu/uci/ics/hyracks/examples/tpch/client/Main.java b/hyracks/hyracks-examples/tpch-example/tpchclient/src/main/java/edu/uci/ics/hyracks/examples/tpch/client/Main.java
index 0ad0ff0..6df9ff8 100644
--- a/hyracks/hyracks-examples/tpch-example/tpchclient/src/main/java/edu/uci/ics/hyracks/examples/tpch/client/Main.java
+++ b/hyracks/hyracks-examples/tpch-example/tpchclient/src/main/java/edu/uci/ics/hyracks/examples/tpch/client/Main.java
@@ -72,9 +72,6 @@
         @Option(name = "-port", usage = "Hyracks Cluster Controller Port (default: 1098)", required = false)
         public int port = 1098;
 
-        @Option(name = "-app", usage = "Hyracks Application name", required = true)
-        public String app;
-
         @Option(name = "-infile-customer-splits", usage = "Comma separated list of file-splits for the CUSTOMER input. A file-split is <node-name>:<path>", required = true)
         public String inFileCustomerSplits;
 
@@ -127,7 +124,7 @@
                 options.graceFactor, options.memSize, options.tableSize, options.hasGroupBy);
 
         long start = System.currentTimeMillis();
-        JobId jobId = hcc.startJob(options.app, job,
+        JobId jobId = hcc.startJob(job,
                 options.profile ? EnumSet.of(JobFlag.PROFILE_RUNTIME) : EnumSet.noneOf(JobFlag.class));
         hcc.waitForCompletion(jobId);
         long end = System.currentTimeMillis();
diff --git a/hyracks/hyracks-examples/tpch-example/tpchserver/pom.xml b/hyracks/hyracks-examples/tpch-example/tpchserver/pom.xml
new file mode 100644
index 0000000..6b97078
--- /dev/null
+++ b/hyracks/hyracks-examples/tpch-example/tpchserver/pom.xml
@@ -0,0 +1,88 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>edu.uci.ics.hyracks.examples.tpch</groupId>
+  <artifactId>tpchserver</artifactId>
+  <name>tpchserver</name>
+
+  <parent>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>tpch-example</artifactId>
+    <version>0.2.5-SNAPSHOT</version>
+  </parent>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>appassembler-maven-plugin</artifactId>
+        <version>1.3</version>
+        <executions>
+          <execution>
+            <configuration>
+              <programs>
+                <program>
+                  <mainClass>edu.uci.ics.hyracks.control.cc.CCDriver</mainClass>
+                  <name>hyrackscc</name>
+                </program>
+                <program>
+                  <mainClass>edu.uci.ics.hyracks.control.nc.NCDriver</mainClass>
+                  <name>hyracksnc</name>
+                </program>
+              </programs>
+              <repositoryLayout>flat</repositoryLayout>
+              <repositoryName>lib</repositoryName>
+            </configuration>
+            <phase>package</phase>
+            <goals>
+              <goal>assemble</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <artifactId>maven-assembly-plugin</artifactId>
+        <version>2.2-beta-5</version>
+        <executions>
+          <execution>
+            <configuration>
+              <descriptors>
+                <descriptor>src/main/assembly/binary-assembly.xml</descriptor>
+              </descriptors>
+            </configuration>
+            <phase>package</phase>
+            <goals>
+              <goal>attached</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+    <dependency>
+        <groupId>edu.uci.ics.hyracks</groupId>
+        <artifactId>hyracks-dataflow-std</artifactId>
+        <version>0.2.5-SNAPSHOT</version>
+        <scope>compile</scope>
+    </dependency>
+    <dependency>
+    	<groupId>edu.uci.ics.hyracks</groupId>
+    	<artifactId>hyracks-data-std</artifactId>
+    	<version>0.2.5-SNAPSHOT</version>
+    </dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-control-cc</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-control-nc</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  </dependencies>
+</project>
diff --git a/hyracks/hyracks-examples/tpch-example/tpchserver/src/main/assembly/binary-assembly.xml b/hyracks/hyracks-examples/tpch-example/tpchserver/src/main/assembly/binary-assembly.xml
new file mode 100644
index 0000000..cd598d9
--- /dev/null
+++ b/hyracks/hyracks-examples/tpch-example/tpchserver/src/main/assembly/binary-assembly.xml
@@ -0,0 +1,23 @@
+<assembly>
+  <id>binary-assembly</id>
+  <formats>
+    <format>zip</format>
+    <format>dir</format>
+  </formats>
+  <includeBaseDirectory>false</includeBaseDirectory>
+  <fileSets>
+    <fileSet>
+      <directory>target/appassembler/bin</directory>
+      <outputDirectory>bin</outputDirectory>
+      <fileMode>0755</fileMode>
+    </fileSet>
+    <fileSet>
+      <directory>target/appassembler/lib</directory>
+      <outputDirectory>lib</outputDirectory>
+    </fileSet>
+    <fileSet>
+      <directory>docs</directory>
+      <outputDirectory>docs</outputDirectory>
+    </fileSet>
+  </fileSets>
+</assembly>
diff --git a/hyracks/hyracks-hadoop-compat/pom.xml b/hyracks/hyracks-hadoop-compat/pom.xml
index 09d3127..88082af 100644
--- a/hyracks/hyracks-hadoop-compat/pom.xml
+++ b/hyracks/hyracks-hadoop-compat/pom.xml
@@ -1,14 +1,12 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-hadoop-compat</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-hadoop-compat</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -82,7 +80,7 @@
     <dependency>
     	<groupId>edu.uci.ics.hyracks</groupId>
     	<artifactId>hyracks-dataflow-hadoop</artifactId>
-    	<version>0.2.4-SNAPSHOT</version>
+    	<version>0.2.5-SNAPSHOT</version>
     	<type>jar</type>
     	<scope>compile</scope>
     </dependency>
diff --git a/hyracks/hyracks-hadoop-compat/src/main/java/edu/uci/ics/hyracks/hadoop/compat/client/HyracksClient.java b/hyracks/hyracks-hadoop-compat/src/main/java/edu/uci/ics/hyracks/hadoop/compat/client/HyracksClient.java
index dfd229a..89cc1e5 100644
--- a/hyracks/hyracks-hadoop-compat/src/main/java/edu/uci/ics/hyracks/hadoop/compat/client/HyracksClient.java
+++ b/hyracks/hyracks-hadoop-compat/src/main/java/edu/uci/ics/hyracks/hadoop/compat/client/HyracksClient.java
@@ -40,35 +40,19 @@
         initialize(properties);
     }
 
-    private Set<String> getRequiredLibs(Set<String> userLibs) {
-        Set<String> requiredLibs = new HashSet<String>();
-        for (String systemLib : systemLibs) {
-            requiredLibs.add(systemLib);
-        }
-        for (String userLib : userLibs) {
-            requiredLibs.add(userLib);
-        }
-        return requiredLibs;
-    }
-
     public JobStatus getJobStatus(JobId jobId) throws Exception {
         return connection.getJobStatus(jobId);
     }
 
-    private void createApplication(String applicationName, Set<String> userLibs) throws Exception {
-        connection.createApplication(applicationName,
-                Utilities.getHyracksArchive(applicationName, getRequiredLibs(userLibs)));
-    }
-
     public HyracksRunningJob submitJob(String applicationName, JobSpecification spec) throws Exception {
         String jobProfilingVal = System.getenv(jobProfilingKey);
         boolean doProfiling = ("true".equalsIgnoreCase(jobProfilingVal));
         JobId jobId;
         if (doProfiling) {
             System.out.println("PROFILING");
-            jobId = connection.startJob(applicationName, spec, EnumSet.of(JobFlag.PROFILE_RUNTIME));
+            jobId = connection.startJob(spec, EnumSet.of(JobFlag.PROFILE_RUNTIME));
         } else {
-            jobId = connection.startJob(applicationName, spec);
+            jobId = connection.startJob(spec);
         }
         HyracksRunningJob runningJob = new HyracksRunningJob(jobId, spec, this);
         return runningJob;
@@ -76,7 +60,6 @@
 
     public HyracksRunningJob submitJob(String applicationName, JobSpecification spec, Set<String> userLibs)
             throws Exception {
-        createApplication(applicationName, userLibs);
         return submitJob(applicationName, spec);
     }
 
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-0.20.2/pom.xml b/hyracks/hyracks-hdfs/hyracks-hdfs-0.20.2/pom.xml
index c708b0d..dd26f1e 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-0.20.2/pom.xml
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-0.20.2/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<artifactId>hyracks-hdfs</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -98,7 +98,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-0.23.1/pom.xml b/hyracks/hyracks-hdfs/hyracks-hdfs-0.23.1/pom.xml
index 9f96ac1..d0f11eb 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-0.23.1/pom.xml
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-0.23.1/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<artifactId>hyracks-hdfs</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 	<build>
 		<plugins>
@@ -202,7 +202,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/pom.xml b/hyracks/hyracks-hdfs/hyracks-hdfs-core/pom.xml
index b693c0a..5de9f37 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/pom.xml
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/pom.xml
@@ -1,12 +1,13 @@
 <?xml version="1.0"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>hyracks-hdfs-core</artifactId>
 	<name>hyracks-hdfs-core</name>
 	<parent>
 		<artifactId>hyracks-hdfs</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -190,31 +191,31 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/dataflow/HDFSWriteOperatorDescriptor.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/dataflow/HDFSWriteOperatorDescriptor.java
index f3ec2fd..3ce6b2a 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/dataflow/HDFSWriteOperatorDescriptor.java
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/dataflow/HDFSWriteOperatorDescriptor.java
@@ -39,63 +39,55 @@
 import edu.uci.ics.hyracks.hdfs.api.ITupleWriterFactory;
 
 /**
- * The HDFS file write operator using the Hadoop old API. To use this operator,
- * a user need to provide an ITupleWriterFactory.
+ * The HDFS file write operator using the Hadoop old API.
+ * To use this operator, a user need to provide an ITupleWriterFactory.
  */
 @SuppressWarnings("deprecation")
-public class HDFSWriteOperatorDescriptor extends
-		AbstractSingleActivityOperatorDescriptor {
+public class HDFSWriteOperatorDescriptor extends AbstractSingleActivityOperatorDescriptor {
 
-	private static final long serialVersionUID = 1L;
-	private ConfFactory confFactory;
-	private ITupleWriterFactory tupleWriterFactory;
+    private static final long serialVersionUID = 1L;
+    private ConfFactory confFactory;
+    private ITupleWriterFactory tupleWriterFactory;
 
-	/**
-	 * The constructor of HDFSWriteOperatorDescriptor.
-	 * 
-	 * @param spec
-	 *            the JobSpecification object
-	 * @param conf
-	 *            the Hadoop JobConf which contains the output path
-	 * @param tupleWriterFactory
-	 *            the ITupleWriterFactory implementation object
-	 * @throws HyracksException
-	 */
-	public HDFSWriteOperatorDescriptor(JobSpecification spec, JobConf conf,
-			ITupleWriterFactory tupleWriterFactory) throws HyracksException {
-		super(spec, 1, 0);
-		this.confFactory = new ConfFactory(conf);
-		this.tupleWriterFactory = tupleWriterFactory;
-	}
+    /**
+     * The constructor of HDFSWriteOperatorDescriptor.
+     * 
+     * @param spec
+     *            the JobSpecification object
+     * @param conf
+     *            the Hadoop JobConf which contains the output path
+     * @param tupleWriterFactory
+     *            the ITupleWriterFactory implementation object
+     * @throws HyracksException
+     */
+    public HDFSWriteOperatorDescriptor(JobSpecification spec, JobConf conf, ITupleWriterFactory tupleWriterFactory)
+            throws HyracksException {
+        super(spec, 1, 0);
+        this.confFactory = new ConfFactory(conf);
+        this.tupleWriterFactory = tupleWriterFactory;
+    }
 
-	@Override
-	public IOperatorNodePushable createPushRuntime(
-			final IHyracksTaskContext ctx,
-			final IRecordDescriptorProvider recordDescProvider,
-			final int partition, final int nPartitions)
-			throws HyracksDataException {
+    @Override
+    public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
+            final IRecordDescriptorProvider recordDescProvider, final int partition, final int nPartitions)
+            throws HyracksDataException {
 
-		return new AbstractUnaryInputSinkOperatorNodePushable() {
+        return new AbstractUnaryInputSinkOperatorNodePushable() {
 
-			private FSDataOutputStream dos;
-			private RecordDescriptor inputRd = recordDescProvider
-					.getInputRecordDescriptor(getActivityId(), 0);;
-			private FrameTupleAccessor accessor = new FrameTupleAccessor(
-					ctx.getFrameSize(), inputRd);
-			private FrameTupleReference tuple = new FrameTupleReference();
-			private ITupleWriter tupleWriter;
-			private ClassLoader ctxCL;
+            private FSDataOutputStream dos;
+            private RecordDescriptor inputRd = recordDescProvider.getInputRecordDescriptor(getActivityId(), 0);;
+            private FrameTupleAccessor accessor = new FrameTupleAccessor(ctx.getFrameSize(), inputRd);
+            private FrameTupleReference tuple = new FrameTupleReference();
+            private ITupleWriter tupleWriter;
+            private ClassLoader ctxCL;
 
-			@Override
-			public void open() throws HyracksDataException {
-				ctxCL = Thread.currentThread().getContextClassLoader();
-				Thread.currentThread().setContextClassLoader(
-						this.getClass().getClassLoader());
-				JobConf conf = confFactory.getConf();
-				String outputDirPath = FileOutputFormat.getOutputPath(conf)
-						.toString();
-				String fileName = outputDirPath + File.separator + "part-"
-						+ partition;
+            @Override
+            public void open() throws HyracksDataException {
+                ctxCL = Thread.currentThread().getContextClassLoader();
+                Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
+                JobConf conf = confFactory.getConf();
+                String outputDirPath = FileOutputFormat.getOutputPath(conf).toString();
+                String fileName = outputDirPath + File.separator + "part-" + partition;
 
                 tupleWriter = tupleWriterFactory.getTupleWriter(ctx);
                 try {
@@ -107,21 +99,20 @@
                 }
             }
 
-			@Override
-			public void nextFrame(ByteBuffer buffer)
-					throws HyracksDataException {
-				accessor.reset(buffer);
-				int tupleCount = accessor.getTupleCount();
-				for (int i = 0; i < tupleCount; i++) {
-					tuple.reset(accessor, i);
-					tupleWriter.write(dos, tuple);
-				}
-			}
+            @Override
+            public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+                accessor.reset(buffer);
+                int tupleCount = accessor.getTupleCount();
+                for (int i = 0; i < tupleCount; i++) {
+                    tuple.reset(accessor, i);
+                    tupleWriter.write(dos, tuple);
+                }
+            }
 
-			@Override
-			public void fail() throws HyracksDataException {
+            @Override
+            public void fail() throws HyracksDataException {
 
-			}
+            }
 
             @Override
             public void close() throws HyracksDataException {
@@ -135,6 +126,6 @@
                 }
             }
 
-		};
-	}
+        };
+    }
 }
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs2/dataflow/HDFSReadOperatorDescriptor.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs2/dataflow/HDFSReadOperatorDescriptor.java
index 9e9abdf..8b58ecd 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs2/dataflow/HDFSReadOperatorDescriptor.java
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs2/dataflow/HDFSReadOperatorDescriptor.java
@@ -114,6 +114,7 @@
                 try {
                     Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
                     Job job = confFactory.getConf();
+                    job.getConfiguration().setClassLoader(ctx.getJobletContext().getClassLoader());
                     IKeyValueParser parser = tupleParserFactory.createKeyValueParser(ctx);
                     writer.open();
                     InputFormat inputFormat = ReflectionUtils.newInstance(job.getInputFormatClass(),
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/dataflow/DataflowTest.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/dataflow/DataflowTest.java
index 2686077..affe1347 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/dataflow/DataflowTest.java
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/dataflow/DataflowTest.java
@@ -71,7 +71,6 @@
     private static final String HDFS_INPUT_PATH = "/customer/";
     private static final String HDFS_OUTPUT_PATH = "/customer_result/";
 
-    private static final String HYRACKS_APP_NAME = "DataflowTest";
     private static final String HADOOP_CONF_PATH = ACTUAL_RESULT_DIR + File.separator + "conf.xml";
     private MiniDFSCluster dfsCluster;
 
@@ -82,7 +81,6 @@
     public void setUp() throws Exception {
         cleanupStores();
         HyracksUtils.init();
-        HyracksUtils.createApp(HYRACKS_APP_NAME);
         FileUtils.forceMkdir(new File(ACTUAL_RESULT_DIR));
         FileUtils.cleanDirectory(new File(ACTUAL_RESULT_DIR));
         startHDFS();
@@ -164,7 +162,7 @@
 
         IHyracksClientConnection client = new HyracksConnection(HyracksUtils.CC_HOST,
                 HyracksUtils.TEST_HYRACKS_CC_CLIENT_PORT);
-        JobId jobId = client.startJob(HYRACKS_APP_NAME, jobSpec);
+        JobId jobId = client.startJob(jobSpec);
         client.waitForCompletion(jobId);
 
         Assert.assertEquals(true, checkResults());
@@ -196,7 +194,6 @@
 
     @Override
     public void tearDown() throws Exception {
-        HyracksUtils.destroyApp(HYRACKS_APP_NAME);
         HyracksUtils.deinit();
         cleanupHDFS();
     }
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/utils/HyracksUtils.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/utils/HyracksUtils.java
index 8c12518..bdff2fd 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/utils/HyracksUtils.java
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/utils/HyracksUtils.java
@@ -83,14 +83,6 @@
         hcc = new HyracksConnection(CC_HOST, TEST_HYRACKS_CC_CLIENT_PORT);
     }
 
-    public static void destroyApp(String hyracksAppName) throws Exception {
-        hcc.destroyApplication(hyracksAppName);
-    }
-
-    public static void createApp(String hyracksAppName) throws Exception {
-        hcc.createApplication(hyracksAppName, null);
-    }
-
     public static void deinit() throws Exception {
         nc2.stop();
         nc1.stop();
@@ -99,7 +91,7 @@
 
     public static void runJob(JobSpecification spec, String appName) throws Exception {
         spec.setFrameSize(FRAME_SIZE);
-        JobId jobId = hcc.startJob(appName, spec, EnumSet.of(JobFlag.PROFILE_RUNTIME));
+        JobId jobId = hcc.startJob(spec, EnumSet.of(JobFlag.PROFILE_RUNTIME));
         hcc.waitForCompletion(jobId);
     }
 
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/utils/TestUtils.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/utils/TestUtils.java
index e155a2c..3826688 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/utils/TestUtils.java
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/utils/TestUtils.java
@@ -15,12 +15,9 @@
 
 package edu.uci.ics.hyracks.hdfs.utils;
 
-import java.awt.List;
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileReader;
-import java.util.ArrayList;
-import java.util.Collections;
 
 public class TestUtils {
 
@@ -51,44 +48,6 @@
             readerActual.close();
         }
     }
-    
-    /**
-     * Compare with the sorted expected file.
-     * The actual file may not be sorted; 
-     * @param expectedFile
-     * @param actualFile
-     */
-    public static void compareWithSortedResult(File expectedFile, File actualFile) throws Exception{
-    	BufferedReader readerActual = new BufferedReader(new FileReader(actualFile));
-    	BufferedReader readerExpected = new BufferedReader(new FileReader(expectedFile));
-    	ArrayList<String> actualLines = new ArrayList<String>();
-    	String lineExpected, lineActual;
-    	try{
-    		while ( (lineActual = readerActual.readLine())!=null){
-    			actualLines.add(lineActual);
-    		}
-    		Collections.sort(actualLines);
-    		int num = 1;
-    		for(String actualLine : actualLines){
-    			lineExpected = readerExpected.readLine();
-    			if (lineExpected == null){
-    				throw new Exception("Actual result changed at line " + num + ":\n< " + actualLine + "\n> ");
-    			}
-    			if ( !equalStrings(lineExpected, actualLine)){
-    				   throw new Exception("Result for changed at line " + num + ":\n< " + lineExpected + "\n> "
-                               + actualLine);
-    			}
-                ++num;
-    		}
-	        lineExpected = readerExpected.readLine();
-	        if (lineExpected != null) {
-	            throw new Exception("Actual result changed at line " + num + ":\n< \n> " + lineExpected);
-	        }
-    	} finally{
-    		readerActual.close();
-    		readerExpected.close();
-    	}
-    }
 
     private static boolean equalStrings(String s1, String s2) {
         String[] rowsOne = s1.split("\n");
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs2/dataflow/DataflowTest.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs2/dataflow/DataflowTest.java
index 9f77979..c2892e9 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs2/dataflow/DataflowTest.java
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs2/dataflow/DataflowTest.java
@@ -74,7 +74,6 @@
     private static final String HDFS_INPUT_PATH = "/customer/";
     private static final String HDFS_OUTPUT_PATH = "/customer_result/";
 
-    private static final String HYRACKS_APP_NAME = "DataflowTest";
     private static final String HADOOP_CONF_PATH = ACTUAL_RESULT_DIR + File.separator + "conf.xml";
     private MiniDFSCluster dfsCluster;
     private MiniDFSClusterFactory dfsClusterFactory = new MiniDFSClusterFactory();
@@ -87,7 +86,6 @@
         conf = new Job();
         cleanupStores();
         HyracksUtils.init();
-        HyracksUtils.createApp(HYRACKS_APP_NAME);
         FileUtils.forceMkdir(new File(ACTUAL_RESULT_DIR));
         FileUtils.cleanDirectory(new File(ACTUAL_RESULT_DIR));
         startHDFS();
@@ -171,7 +169,7 @@
 
         IHyracksClientConnection client = new HyracksConnection(HyracksUtils.CC_HOST,
                 HyracksUtils.TEST_HYRACKS_CC_CLIENT_PORT);
-        JobId jobId = client.startJob(HYRACKS_APP_NAME, jobSpec);
+        JobId jobId = client.startJob(jobSpec);
         client.waitForCompletion(jobId);
 
         Assert.assertEquals(true, checkResults());
@@ -203,7 +201,6 @@
 
     @Override
     public void tearDown() throws Exception {
-        HyracksUtils.destroyApp(HYRACKS_APP_NAME);
         HyracksUtils.deinit();
         cleanupHDFS();
     }
diff --git a/hyracks/hyracks-hdfs/pom.xml b/hyracks/hyracks-hdfs/pom.xml
index bea1244..e3ada06 100644
--- a/hyracks/hyracks-hdfs/pom.xml
+++ b/hyracks/hyracks-hdfs/pom.xml
@@ -8,7 +8,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-ipc/pom.xml b/hyracks/hyracks-ipc/pom.xml
index 14121fd..1368e20 100644
--- a/hyracks/hyracks-ipc/pom.xml
+++ b/hyracks/hyracks-ipc/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
diff --git a/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/pom.xml b/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/pom.xml
index e8342a3..c0a9c45 100644
--- a/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/pom.xml
+++ b/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-maven-plugins</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
diff --git a/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/src/main/java/edu/uci/ics/hyracks/maven/plugin/AbstractHyracksCLIMojo.java b/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/src/main/java/edu/uci/ics/hyracks/maven/plugin/AbstractHyracksCLIMojo.java
deleted file mode 100644
index 7f3faef..0000000
--- a/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/src/main/java/edu/uci/ics/hyracks/maven/plugin/AbstractHyracksCLIMojo.java
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.maven.plugin;
-
-import java.io.File;
-import java.io.PrintWriter;
-
-import org.apache.maven.plugin.MojoExecutionException;
-import org.apache.maven.plugin.MojoFailureException;
-
-public abstract class AbstractHyracksCLIMojo extends AbstractHyracksMojo {
-    private static final String HYRACKS_CLI_SCRIPT = "bin" + File.separator + "hyrackscli";
-
-    /**
-     * @parameter
-     * @required
-     */
-    protected File hyracksCLIHome;
-
-    /**
-     * @parameter
-     * @required
-     */
-    private String ccHost;
-
-    /**
-     * @parameter
-     */
-    private int ccPort;
-
-    @Override
-    public void execute() throws MojoExecutionException, MojoFailureException {
-        StringBuilder buffer = new StringBuilder();
-        buffer.append(createConnectCommand());
-        buffer.append('\n');
-        buffer.append(getCommands());
-        final Process proc = launch(new File(hyracksCLIHome, makeScriptName(HYRACKS_CLI_SCRIPT)), null, null);
-        try {
-            PrintWriter out = new PrintWriter(proc.getOutputStream());
-            out.println(buffer.toString());
-            out.close();
-            proc.waitFor();
-        } catch (Exception e) {
-            throw new MojoExecutionException(e.getMessage());
-        }
-    }
-
-    private String createConnectCommand() {
-        return "connect to \"" + ccHost + (ccPort == 0 ? "" : (":" + ccPort)) + "\";";
-    }
-
-    protected abstract String getCommands();
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/src/main/java/edu/uci/ics/hyracks/maven/plugin/HyracksAppDeploymentMojo.java b/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/src/main/java/edu/uci/ics/hyracks/maven/plugin/HyracksAppDeploymentMojo.java
deleted file mode 100644
index 76bbb5a..0000000
--- a/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/src/main/java/edu/uci/ics/hyracks/maven/plugin/HyracksAppDeploymentMojo.java
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.maven.plugin;
-
-import java.io.File;
-
-/**
- * @goal deploy-app
- */
-public class HyracksAppDeploymentMojo extends AbstractHyracksCLIMojo {
-    /**
-     * @parameter
-     * @required
-     */
-    private String appName;
-
-    /**
-     * @parameter
-     * @required
-     */
-    private File harFile;
-
-    @Override
-    protected String getCommands() {
-        return "create application " + appName + " \"" + harFile.getAbsolutePath() + "\";";
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-maven-plugins/pom.xml b/hyracks/hyracks-maven-plugins/pom.xml
index ee97d58..08bbb2c 100644
--- a/hyracks/hyracks-maven-plugins/pom.xml
+++ b/hyracks/hyracks-maven-plugins/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <dependencies>
diff --git a/hyracks/hyracks-net/pom.xml b/hyracks/hyracks-net/pom.xml
index de2a2a0..9dde9a1 100644
--- a/hyracks/hyracks-net/pom.xml
+++ b/hyracks/hyracks-net/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
diff --git a/hyracks/hyracks-server/pom.xml b/hyracks/hyracks-server/pom.xml
index 85af7f2..e32b658 100644
--- a/hyracks/hyracks-server/pom.xml
+++ b/hyracks/hyracks-server/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -74,14 +74,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-cc</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-nc</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-storage-am-bloomfilter/pom.xml b/hyracks/hyracks-storage-am-bloomfilter/pom.xml
new file mode 100644
index 0000000..76c64d8
--- /dev/null
+++ b/hyracks/hyracks-storage-am-bloomfilter/pom.xml
@@ -0,0 +1,40 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <artifactId>hyracks-storage-am-bloomfilter</artifactId>
+
+  <parent>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks</artifactId>
+    <version>0.2.5-SNAPSHOT</version>
+  </parent>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.0.2</version>
+        <configuration>
+          <source>1.7</source>
+          <target>1.7</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-common</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>  	
+  	<dependency>
+  		<groupId>junit</groupId>
+  		<artifactId>junit</artifactId>
+  		<version>4.8.1</version>
+  		<type>jar</type>
+  		<scope>test</scope>
+  	</dependency>  	  		
+  </dependencies>
+</project>
diff --git a/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/BloomCalculations.java b/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/BloomCalculations.java
new file mode 100644
index 0000000..9c9a7be
--- /dev/null
+++ b/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/BloomCalculations.java
@@ -0,0 +1,163 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.bloomfilter.impls;
+
+/**
+ * This class has been taken from cassandra source code with minor modifications.
+ */
+
+/**
+ * The following calculations are taken from:
+ * http://www.cs.wisc.edu/~cao/papers/summary-cache/node8.html
+ * "Bloom Filters - the math"
+ * This class's static methods are meant to facilitate the use of the Bloom
+ * Filter class by helping to choose correct values of 'bits per element' and
+ * 'number of hash functions, k'.
+ */
+public class BloomCalculations {
+
+    private static final int minBuckets = 2;
+    private static final int minK = 1;
+
+    /**
+     * In the following table, the row 'i' shows false positive rates if i buckets
+     * per element are used. Column 'j' shows false positive rates if j hash
+     * functions are used. The first row is 'i=0', the first column is 'j=0'.
+     * Each cell (i,j) the false positive rate determined by using i buckets per
+     * element and j hash functions.
+     */
+    static final double[][] probs = new double[][] {
+            { 1.0 }, // dummy row representing 0 buckets per element
+            { 1.0, 1.0 }, // dummy row representing 1 buckets per element
+            { 1.0, 0.393, 0.400 },
+            { 1.0, 0.283, 0.237, 0.253 },
+            { 1.0, 0.221, 0.155, 0.147, 0.160 },
+            { 1.0, 0.181, 0.109, 0.092, 0.092, 0.101 }, // 5
+            { 1.0, 0.154, 0.0804, 0.0609, 0.0561, 0.0578, 0.0638 },
+            { 1.0, 0.133, 0.0618, 0.0423, 0.0359, 0.0347, 0.0364 },
+            { 1.0, 0.118, 0.0489, 0.0306, 0.024, 0.0217, 0.0216, 0.0229 },
+            { 1.0, 0.105, 0.0397, 0.0228, 0.0166, 0.0141, 0.0133, 0.0135, 0.0145 },
+            { 1.0, 0.0952, 0.0329, 0.0174, 0.0118, 0.00943, 0.00844, 0.00819, 0.00846 }, // 10
+            { 1.0, 0.0869, 0.0276, 0.0136, 0.00864, 0.0065, 0.00552, 0.00513, 0.00509 },
+            { 1.0, 0.08, 0.0236, 0.0108, 0.00646, 0.00459, 0.00371, 0.00329, 0.00314 },
+            { 1.0, 0.074, 0.0203, 0.00875, 0.00492, 0.00332, 0.00255, 0.00217, 0.00199, 0.00194 },
+            { 1.0, 0.0689, 0.0177, 0.00718, 0.00381, 0.00244, 0.00179, 0.00146, 0.00129, 0.00121, 0.0012 },
+            { 1.0, 0.0645, 0.0156, 0.00596, 0.003, 0.00183, 0.00128, 0.001, 0.000852, 0.000775, 0.000744 }, // 15
+            { 1.0, 0.0606, 0.0138, 0.005, 0.00239, 0.00139, 0.000935, 0.000702, 0.000574, 0.000505, 0.00047, 0.000459 },
+            { 1.0, 0.0571, 0.0123, 0.00423, 0.00193, 0.00107, 0.000692, 0.000499, 0.000394, 0.000335, 0.000302,
+                    0.000287, 0.000284 },
+            { 1.0, 0.054, 0.0111, 0.00362, 0.00158, 0.000839, 0.000519, 0.00036, 0.000275, 0.000226, 0.000198,
+                    0.000183, 0.000176 },
+            { 1.0, 0.0513, 0.00998, 0.00312, 0.0013, 0.000663, 0.000394, 0.000264, 0.000194, 0.000155, 0.000132,
+                    0.000118, 0.000111, 0.000109 },
+            { 1.0, 0.0488, 0.00906, 0.0027, 0.00108, 0.00053, 0.000303, 0.000196, 0.00014, 0.000108, 8.89e-05,
+                    7.77e-05, 7.12e-05, 6.79e-05, 6.71e-05 } // 20
+    }; // the first column is a dummy column representing K=0.
+
+    /**
+     * The optimal number of hashes for a given number of bits per element.
+     * These values are automatically calculated from the data above.
+     */
+    private static final int[] optKPerBuckets = new int[probs.length];
+
+    static {
+        for (int i = 0; i < probs.length; i++) {
+            double min = Double.MAX_VALUE;
+            double[] prob = probs[i];
+            for (int j = 0; j < prob.length; j++) {
+                if (prob[j] < min) {
+                    min = prob[j];
+                    optKPerBuckets[i] = Math.max(minK, j);
+                }
+            }
+        }
+    }
+
+    /**
+     * Given the number of buckets that can be used per element, return a
+     * specification that minimizes the false positive rate.
+     * 
+     * @param bucketsPerElement
+     *            The number of buckets per element for the filter.
+     * @return A spec that minimizes the false positive rate.
+     */
+    public static BloomFilterSpecification computeBloomSpec(int bucketsPerElement) {
+        assert bucketsPerElement >= 1;
+        assert bucketsPerElement <= probs.length - 1;
+        return new BloomFilterSpecification(optKPerBuckets[bucketsPerElement], bucketsPerElement);
+    }
+
+    /**
+     * Given a maximum tolerable false positive probability, compute a Bloom
+     * specification which will give less than the specified false positive rate,
+     * but minimize the number of buckets per element and the number of hash
+     * functions used. Because bandwidth (and therefore total bitvector size)
+     * is considered more expensive than computing power, preference is given
+     * to minimizing buckets per element rather than number of hash functions.
+     * 
+     * @param maxBucketsPerElement
+     *            The maximum number of buckets available for the filter.
+     * @param maxFalsePosProb
+     *            The maximum tolerable false positive rate.
+     * @return A Bloom Specification which would result in a false positive rate
+     *         less than specified by the function call
+     * @throws UnsupportedOperationException
+     *             if a filter satisfying the parameters cannot be met
+     */
+    public static BloomFilterSpecification computeBloomSpec(int maxBucketsPerElement, double maxFalsePosProb) {
+        assert maxBucketsPerElement >= 1;
+        assert maxBucketsPerElement <= probs.length - 1;
+        int maxK = probs[maxBucketsPerElement].length - 1;
+
+        // Handle the trivial cases
+        if (maxFalsePosProb >= probs[minBuckets][minK]) {
+            return new BloomFilterSpecification(2, optKPerBuckets[2]);
+        }
+        if (maxFalsePosProb < probs[maxBucketsPerElement][maxK]) {
+            throw new UnsupportedOperationException(String.format("Unable to satisfy %s with %s buckets per element",
+                    maxFalsePosProb, maxBucketsPerElement));
+        }
+
+        // First find the minimal required number of buckets:
+        int bucketsPerElement = 2;
+        int K = optKPerBuckets[2];
+        while (probs[bucketsPerElement][K] > maxFalsePosProb) {
+            bucketsPerElement++;
+            K = optKPerBuckets[bucketsPerElement];
+        }
+        // Now that the number of buckets is sufficient, see if we can relax K
+        // without losing too much precision.
+        while (probs[bucketsPerElement][K - 1] <= maxFalsePosProb) {
+            K--;
+        }
+
+        return new BloomFilterSpecification(K, bucketsPerElement);
+    }
+
+    /**
+     * Calculates the maximum number of buckets per element that this implementation
+     * can support. Crucially, it will lower the bucket count if necessary to meet
+     * BitSet's size restrictions.
+     */
+    public static int maxBucketsPerElement(long numElements) {
+        numElements = Math.max(1, numElements);
+        double v = Long.MAX_VALUE / (double) numElements;
+        if (v < 1.0) {
+            throw new UnsupportedOperationException("Cannot compute probabilities for " + numElements + " elements.");
+        }
+        return Math.min(BloomCalculations.probs.length - 1, (int) v);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/BloomFilter.java b/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/BloomFilter.java
new file mode 100644
index 0000000..0e796b0
--- /dev/null
+++ b/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/BloomFilter.java
@@ -0,0 +1,269 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.bloomfilter.impls;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class BloomFilter {
+
+    private final static int METADATA_PAGE_ID = 0;
+    private final static int NUM_PAGES_OFFSET = 0; // 0
+    private final static int NUM_HASHES_USED_OFFSET = NUM_PAGES_OFFSET + 4; // 4
+    private final static int NUM_ELEMENTS_OFFSET = NUM_HASHES_USED_OFFSET + 4; // 8
+    private final static int NUM_BITS_OFFSET = NUM_ELEMENTS_OFFSET + 8; // 12
+
+    private final IBufferCache bufferCache;
+    private final IFileMapProvider fileMapProvider;
+    private final FileReference file;
+    private final int[] keyFields;
+    private int fileId = -1;
+    private boolean isActivated = false;
+
+    private int numPages;
+    private int numHashes;
+    private long numElements;
+    private long numBits;
+    private int numBitsPerPage;
+
+    private final ArrayList<ICachedPage> bloomFilterPages = new ArrayList<ICachedPage>();
+    private final static long SEED = 0L;
+
+    public BloomFilter(IBufferCache bufferCache, IFileMapProvider fileMapProvider, FileReference file, int[] keyFields)
+            throws HyracksDataException {
+        this.bufferCache = bufferCache;
+        this.fileMapProvider = fileMapProvider;
+        this.file = file;
+        this.keyFields = keyFields;
+        numBitsPerPage = bufferCache.getPageSize() * Byte.SIZE;
+    }
+
+    public int getFileId() {
+        return fileId;
+    }
+
+    public FileReference getFileReference() {
+        return file;
+    }
+
+    public int getNumPages() throws HyracksDataException {
+        if (!isActivated) {
+            throw new HyracksDataException("The bloom filter is not activated.");
+        }
+        return numPages;
+    }
+
+    public long getNumElements() throws HyracksDataException {
+        if (!isActivated) {
+            throw new HyracksDataException("The bloom filter is not activated.");
+        }
+        return numElements;
+    }
+
+    public boolean contains(ITupleReference tuple, long[] hashes) {
+        MurmurHash128Bit.hash3_x64_128(tuple, keyFields, SEED, hashes);
+        for (int i = 0; i < numHashes; ++i) {
+            long hash = Math.abs((hashes[0] + (long) i * hashes[1]) % numBits);
+
+            ByteBuffer buffer = bloomFilterPages.get((int) (hash / numBitsPerPage)).getBuffer();
+            int byteIndex = (int) (hash % numBitsPerPage) >> 3; // divide by 8
+            byte b = buffer.get(byteIndex);
+            int bitIndex = (int) (hash % numBitsPerPage) & 0x07; // mod 8
+
+            if (!((b & (1L << bitIndex)) != 0)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    private void prepareFile() throws HyracksDataException {
+        boolean fileIsMapped = false;
+        synchronized (fileMapProvider) {
+            fileIsMapped = fileMapProvider.isMapped(file);
+            if (!fileIsMapped) {
+                bufferCache.createFile(file);
+            }
+            fileId = fileMapProvider.lookupFileId(file);
+            try {
+                // Also creates the file if it doesn't exist yet.
+                bufferCache.openFile(fileId);
+            } catch (HyracksDataException e) {
+                // Revert state of buffer cache since file failed to open.
+                if (!fileIsMapped) {
+                    bufferCache.deleteFile(fileId, false);
+                }
+                throw e;
+            }
+        }
+    }
+
+    public synchronized void create() throws HyracksDataException {
+        if (isActivated) {
+            throw new HyracksDataException("Failed to create the bloom filter since it is activated.");
+        }
+        prepareFile();
+        ICachedPage metaPage = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, METADATA_PAGE_ID), true);
+        metaPage.acquireWriteLatch();
+        metaPage.getBuffer().putInt(NUM_PAGES_OFFSET, 0);
+        metaPage.getBuffer().putInt(NUM_HASHES_USED_OFFSET, 0);
+        metaPage.getBuffer().putLong(NUM_ELEMENTS_OFFSET, 0L);
+        metaPage.getBuffer().putLong(NUM_BITS_OFFSET, 0L);
+        metaPage.releaseWriteLatch();
+        bufferCache.unpin(metaPage);
+        bufferCache.closeFile(fileId);
+    }
+
+    public synchronized void activate() throws HyracksDataException {
+        if (isActivated) {
+            return;
+        }
+
+        prepareFile();
+        readBloomFilterMetaData();
+
+        int currentPageId = 1;
+        while (currentPageId <= numPages) {
+            ICachedPage page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, currentPageId), false);
+            bloomFilterPages.add(page);
+            ++currentPageId;
+        }
+        isActivated = true;
+    }
+
+    private void readBloomFilterMetaData() throws HyracksDataException {
+        ICachedPage metaPage = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, METADATA_PAGE_ID), false);
+        metaPage.acquireReadLatch();
+        numPages = metaPage.getBuffer().getInt(NUM_PAGES_OFFSET);
+        numHashes = metaPage.getBuffer().getInt(NUM_HASHES_USED_OFFSET);
+        numElements = metaPage.getBuffer().getLong(NUM_ELEMENTS_OFFSET);
+        numBits = metaPage.getBuffer().getLong(NUM_BITS_OFFSET);
+        metaPage.releaseReadLatch();
+        bufferCache.unpin(metaPage);
+    }
+
+    public synchronized void deactivate() throws HyracksDataException {
+        if (!isActivated) {
+            return;
+        }
+
+        for (int i = 0; i < numPages; ++i) {
+            bufferCache.unpin(bloomFilterPages.get(i));
+        }
+        bloomFilterPages.clear();
+        bufferCache.closeFile(fileId);
+        isActivated = false;
+    }
+
+    public synchronized void destroy() throws HyracksDataException {
+        if (isActivated) {
+            throw new HyracksDataException("Failed to destroy the bloom filter since it is activated.");
+        }
+
+        file.delete();
+        if (fileId == -1) {
+            return;
+        }
+        bufferCache.deleteFile(fileId, false);
+        fileId = -1;
+    }
+
+    public IIndexBulkLoader createBuilder(long numElements, int numHashes, int numBitsPerElement)
+            throws HyracksDataException {
+        return new BloomFilterBuilder(numElements, numHashes, numBitsPerElement);
+    }
+
+    public class BloomFilterBuilder implements IIndexBulkLoader {
+        private final long[] hashes = new long[2];
+
+        private final long numElements;
+        private final int numHashes;
+        private final long numBits;
+        private final int numPages;
+
+        public BloomFilterBuilder(long numElements, int numHashes, int numBitsPerElement) throws HyracksDataException {
+            if (!isActivated) {
+                throw new HyracksDataException("Failed to create the bloom filter builder since it is not activated.");
+            }
+
+            this.numElements = numElements;
+            this.numHashes = numHashes;
+            numBits = numElements * numBitsPerElement;
+            long tmp = (long) Math.ceil(numBits / (double) numBitsPerPage);
+            if (tmp > Integer.MAX_VALUE) {
+                throw new HyracksDataException("Cannot create a bloom filter with his huge number of pages.");
+            }
+            numPages = (int) tmp;
+            if (numElements > 0) {
+                persistBloomFilterMetaData();
+                readBloomFilterMetaData();
+                int currentPageId = 1;
+                while (currentPageId <= numPages) {
+                    ICachedPage page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, currentPageId), true);
+                    page.acquireWriteLatch();
+                    bloomFilterPages.add(page);
+                    ++currentPageId;
+                }
+            }
+        }
+
+        private void persistBloomFilterMetaData() throws HyracksDataException {
+            ICachedPage metaPage = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, METADATA_PAGE_ID), false);
+            metaPage.acquireWriteLatch();
+            metaPage.getBuffer().putInt(NUM_PAGES_OFFSET, numPages);
+            metaPage.getBuffer().putInt(NUM_HASHES_USED_OFFSET, numHashes);
+            metaPage.getBuffer().putLong(NUM_ELEMENTS_OFFSET, numElements);
+            metaPage.getBuffer().putLong(NUM_BITS_OFFSET, numBits);
+            metaPage.releaseWriteLatch();
+            bufferCache.unpin(metaPage);
+        }
+
+        @Override
+        public void add(ITupleReference tuple) throws IndexException, HyracksDataException {
+            MurmurHash128Bit.hash3_x64_128(tuple, keyFields, SEED, hashes);
+            for (int i = 0; i < numHashes; ++i) {
+                long hash = Math.abs((hashes[0] + (long) i * hashes[1]) % numBits);
+
+                ByteBuffer buffer = bloomFilterPages.get((int) (hash / numBitsPerPage)).getBuffer();
+                int byteIndex = (int) (hash % numBitsPerPage) >> 3; // divide by 8
+                byte b = buffer.get(byteIndex);
+                int bitIndex = (int) (hash % numBitsPerPage) & 0x07; // mod 8
+                b = (byte) (b | (1 << bitIndex));
+
+                buffer.put(byteIndex, b);
+            }
+        }
+
+        @Override
+        public void end() throws HyracksDataException, IndexException {
+            for (int i = 0; i < numPages; ++i) {
+                ICachedPage page = bloomFilterPages.get(i);
+                page.releaseWriteLatch();
+            }
+        }
+
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/BloomFilterFactory.java b/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/BloomFilterFactory.java
new file mode 100644
index 0000000..d430e54
--- /dev/null
+++ b/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/BloomFilterFactory.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.bloomfilter.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class BloomFilterFactory {
+    private final IBufferCache bufferCache;
+    private final IFileMapProvider fileMapProvider;
+    private final int[] bloomFilterKeyFields;
+
+    public BloomFilterFactory(IBufferCache bufferCache, IFileMapProvider fileMapProvider, int[] bloomFilterKeyFields) {
+        this.bufferCache = bufferCache;
+        this.fileMapProvider = fileMapProvider;
+        this.bloomFilterKeyFields = bloomFilterKeyFields;
+    }
+
+    public BloomFilter createBloomFiltertInstance(FileReference file) throws HyracksDataException {
+        return new BloomFilter(bufferCache, fileMapProvider, file, bloomFilterKeyFields);
+    }
+
+    public int[] getBloomFilterKeyFields() {
+        return bloomFilterKeyFields;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/BloomFilterSpecification.java b/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/BloomFilterSpecification.java
new file mode 100644
index 0000000..a1e5517
--- /dev/null
+++ b/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/BloomFilterSpecification.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.bloomfilter.impls;
+
+public final class BloomFilterSpecification {
+    private final int numBucketsPerElement;
+    private final int numHashes;
+
+    public BloomFilterSpecification(int numBucketsPerElement, int numHashes) {
+        this.numBucketsPerElement = numBucketsPerElement;
+        this.numHashes = numHashes;
+    }
+
+    public int getNumBucketsPerElements() {
+        return numBucketsPerElement;
+    }
+
+    public int getNumHashes() {
+        return numHashes;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/MurmurHash128Bit.java b/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/MurmurHash128Bit.java
new file mode 100644
index 0000000..0bc0a7f
--- /dev/null
+++ b/hyracks/hyracks-storage-am-bloomfilter/src/main/java/edu/uci/ics/hyracks/storage/am/bloomfilter/impls/MurmurHash128Bit.java
@@ -0,0 +1,256 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.bloomfilter.impls;
+
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+
+/**
+ * The idea of this class is borrowed from http://murmurhash.googlepages.com/ and cassandra source code.
+ * We changed the hash function to operate on ITupleReference instead of a byte array.
+ **/
+public class MurmurHash128Bit {
+
+    private final static int DUMMY_FIELD = 0;
+
+    public static long rotl64(long v, int n) {
+        return ((v << n) | (v >>> (64 - n)));
+    }
+
+    public static long fmix(long k) {
+        k ^= k >>> 33;
+        k *= 0xff51afd7ed558ccdL;
+        k ^= k >>> 33;
+        k *= 0xc4ceb9fe1a85ec53L;
+        k ^= k >>> 33;
+
+        return k;
+    }
+
+    public static void hash3_x64_128(ITupleReference tuple, int[] keyFields, long seed, long[] hashes) {
+        int length = 0;
+        for (int i = 0; i < keyFields.length; ++i) {
+            length += tuple.getFieldLength(keyFields[i]);
+        }
+        final int nblocks = length >> 4; // Process as 128-bit blocks.
+
+        long h1 = seed;
+        long h2 = seed;
+
+        long c1 = 0x87c37b91114253d5L;
+        long c2 = 0x4cf5ad432745937fL;
+
+        //----------
+        // body
+
+        int currentFieldIndex = 0;
+        int bytePos = 0;
+        for (int i = 0; i < nblocks; ++i) {
+
+            long k1 = 0L;
+            for (int j = 0; j < 8; ++j) {
+                k1 += (((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos] & 0xff) << (j << 3));
+                ++bytePos;
+                if (tuple.getFieldLength(keyFields[currentFieldIndex]) == bytePos) {
+                    ++currentFieldIndex;
+                    bytePos = 0;
+                }
+            }
+            long k2 = 0L;
+            for (int j = 0; j < 8; ++j) {
+                k2 += (((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos] & 0xff) << (j << 3));
+                ++bytePos;
+                if (tuple.getFieldLength(keyFields[currentFieldIndex]) == bytePos) {
+                    ++currentFieldIndex;
+                    bytePos = 0;
+                }
+            }
+
+            k1 *= c1;
+            k1 = rotl64(k1, 31);
+            k1 *= c2;
+            h1 ^= k1;
+
+            h1 = rotl64(h1, 27);
+            h1 += h2;
+            h1 = h1 * 5 + 0x52dce729;
+
+            k2 *= c2;
+            k2 = rotl64(k2, 33);
+            k2 *= c1;
+            h2 ^= k2;
+
+            h2 = rotl64(h2, 31);
+            h2 += h1;
+            h2 = h2 * 5 + 0x38495ab5;
+        }
+
+        //----------
+        // tail
+
+        long k1 = 0L;
+        long k2 = 0L;
+
+        currentFieldIndex = keyFields.length - 1;
+        bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+        switch (length & 15) {
+            case 15:
+                k2 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]) << 48;
+                --bytePos;
+                if (bytePos == -1) {
+                    --currentFieldIndex;
+                    bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+                }
+            case 14:
+                k2 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]) << 40;
+                --bytePos;
+                if (bytePos == -1) {
+                    --currentFieldIndex;
+                    bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+                }
+            case 13:
+                k2 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]) << 32;
+                --bytePos;
+                if (bytePos == -1) {
+                    --currentFieldIndex;
+                    bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+                }
+            case 12:
+                k2 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]) << 24;
+                --bytePos;
+                if (bytePos == -1) {
+                    --currentFieldIndex;
+                    bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+                }
+            case 11:
+                k2 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]) << 16;
+                --bytePos;
+                if (bytePos == -1) {
+                    --currentFieldIndex;
+                    bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+                }
+            case 10:
+                k2 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]) << 8;
+                --bytePos;
+                if (bytePos == -1) {
+                    --currentFieldIndex;
+                    bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+                }
+            case 9:
+                k2 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]);
+                --bytePos;
+                if (bytePos == -1) {
+                    --currentFieldIndex;
+                    bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+                }
+                k2 *= c2;
+                k2 = rotl64(k2, 33);
+                k2 *= c1;
+                h2 ^= k2;
+
+            case 8:
+                k1 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]) << 56;
+                --bytePos;
+                if (bytePos == -1) {
+                    --currentFieldIndex;
+                    bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+                }
+            case 7:
+                k1 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]) << 48;
+                --bytePos;
+                if (bytePos == -1) {
+                    --currentFieldIndex;
+                    bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+                }
+            case 6:
+                k1 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]) << 40;
+                --bytePos;
+                if (bytePos == -1) {
+                    --currentFieldIndex;
+                    bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+                }
+            case 5:
+                k1 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]) << 32;
+                --bytePos;
+                if (bytePos == -1) {
+                    --currentFieldIndex;
+                    bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+                }
+            case 4:
+                k1 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]) << 24;
+                --bytePos;
+                if (bytePos == -1) {
+                    --currentFieldIndex;
+                    bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+                }
+            case 3:
+                k1 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]) << 16;
+                --bytePos;
+                if (bytePos == -1) {
+                    --currentFieldIndex;
+                    bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+                }
+            case 2:
+                k1 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]) << 8;
+                --bytePos;
+                if (bytePos == -1) {
+                    --currentFieldIndex;
+                    bytePos = tuple.getFieldLength(keyFields[currentFieldIndex]) - 1;
+                }
+            case 1:
+                k1 ^= ((long) tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex])
+                        + bytePos]);
+                k1 *= c1;
+                k1 = rotl64(k1, 31);
+                k1 *= c2;
+                h1 ^= k1;
+        };
+
+        //----------
+        // finalization
+
+        h1 ^= length;
+        h2 ^= length;
+
+        h1 += h2;
+        h2 += h1;
+
+        h1 = fmix(h1);
+        h2 = fmix(h2);
+
+        h1 += h2;
+        h2 += h1;
+
+        hashes[0] = h1;
+        hashes[1] = h2;
+    }
+
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-btree/pom.xml b/hyracks/hyracks-storage-am-btree/pom.xml
index 4555ea4..201d597 100644
--- a/hyracks/hyracks-storage-am-btree/pom.xml
+++ b/hyracks/hyracks-storage-am-btree/pom.xml
@@ -1,14 +1,12 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-am-btree</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-am-btree</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -29,28 +27,28 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
         <dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IBTreeFrame.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IBTreeFrame.java
index 7a61d09..ee3fd90 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IBTreeFrame.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IBTreeFrame.java
@@ -15,17 +15,22 @@
 
 package edu.uci.ics.hyracks.storage.am.btree.api;
 
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeOpContext.PageValidationInfo;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 
 public interface IBTreeFrame extends ITreeIndexFrame {
-	public int findUpdateTupleIndex(ITupleReference tuple) throws TreeIndexException;
-	public int findInsertTupleIndex(ITupleReference tuple) throws TreeIndexException;	
-	public int findDeleteTupleIndex(ITupleReference tuple) throws TreeIndexException;
-	public void insertSorted(ITupleReference tuple);
-    public boolean getSmFlag();
+    public int findInsertTupleIndex(ITupleReference tuple) throws TreeIndexException;
+
+    public int findDeleteTupleIndex(ITupleReference tuple) throws TreeIndexException;
+
+    public void insertSorted(ITupleReference tuple);
+
     public void setSmFlag(boolean smFlag);
-    public void setMultiComparator(MultiComparator cmp);
+
+    public boolean getSmFlag();
+
+    public void validate(PageValidationInfo pvi) throws HyracksDataException;
 }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IBTreeInteriorFrame.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IBTreeInteriorFrame.java
index 23fdcf5..ffdcc5c 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IBTreeInteriorFrame.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IBTreeInteriorFrame.java
@@ -15,10 +15,11 @@
 
 package edu.uci.ics.hyracks.storage.am.btree.api;
 
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
 
 public interface IBTreeInteriorFrame extends IBTreeFrame {
-    public int getChildPageId(RangePredicate pred);
+    public int getChildPageId(RangePredicate pred) throws HyracksDataException;
 
     public int getLeftmostChildPageId();
 
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IBTreeLeafFrame.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IBTreeLeafFrame.java
index 74bf2b0..bbb67bd 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IBTreeLeafFrame.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IBTreeLeafFrame.java
@@ -24,13 +24,21 @@
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 
 public interface IBTreeLeafFrame extends IBTreeFrame {
+    public int findTupleIndex(ITupleReference searchKey, ITreeIndexTupleReference pageTuple, MultiComparator cmp,
+            FindTupleMode ftm, FindTupleNoExactMatchPolicy ftp) throws HyracksDataException;
+
+    public int findUpdateTupleIndex(ITupleReference tuple) throws TreeIndexException;
+
+    public int findUpsertTupleIndex(ITupleReference tuple) throws TreeIndexException;
+
+    /**
+     * @param searchTuple the tuple to match 
+     * @param targetTupleIndex the index of the tuple to check
+     * @return the tuple at targetTupleIndex if its keys match searchTuple's keys, otherwise null 
+     */
+    public ITupleReference getMatchingKeyTuple(ITupleReference searchTuple, int targetTupleIndex);
+
     public void setNextLeaf(int nextPage);
 
     public int getNextLeaf();
-
-    public int findTupleIndex(ITupleReference searchKey, ITreeIndexTupleReference pageTuple, MultiComparator cmp,
-            FindTupleMode ftm, FindTupleNoExactMatchPolicy ftp) throws HyracksDataException;
-    
-    public int findUpsertTupleIndex(ITupleReference tuple) throws TreeIndexException;
-    public ITupleReference getUpsertBeforeTuple(ITupleReference tuple, int targetTupleIndex) throws TreeIndexException;
 }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IPrefixSlotManager.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IPrefixSlotManager.java
index 0636968..6ec5eef 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IPrefixSlotManager.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/IPrefixSlotManager.java
@@ -22,29 +22,28 @@
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.FindTupleNoExactMatchPolicy;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 
-// a slot consists of two fields:
-// first field is 1 byte, it indicates the slot number of a prefix tuple
-// we call the first field prefixSlotOff
-// second field is 3 bytes, it points to the start offset of a tuple
-// we call the second field tupleOff
-
-// we distinguish between two slot types:
-// prefix slots that point to prefix tuples, 
-// a frame is assumed to have a field numPrefixTuples
-// tuple slots that point to data tuples
-// a frame is assumed to have a field numTuples
-// a tuple slot contains a tuple pointer and a pointer to a prefix slot (prefix slot number) 
-
-// INSERT procedure
-// a tuple insertion may use an existing prefix tuple 
-// a tuple insertion may never create a new prefix tuple
-// modifying the prefix slots would be extremely expensive because: 
-// potentially all tuples slots would have to change their prefix slot pointers
-// all prefixes are recomputed during a reorg or compaction
-
+/**
+ *  A slot consists of two fields. The first field is 1 byte and it indicates the slot number of 
+ *  a prefix tuple that is called the first field prefixSlotOff. The second field is 3 bytes and 
+ *  it points to the start offset of a tuple that is called the second field tupleOff.
+ *  
+ *  We distinguish between two slot types:
+ *      1) prefix slots that point to prefix tuples (a frame is assumed to have a field numPrefixTuples)
+ *      2) tuple slots that point to data tuples (a frame is assumed to have a field numTuples)
+ *      
+ *  A tuple slot contains a tuple pointer and a pointer to a prefix slot (prefix slot number).
+ *  
+ *  INSERT procedure:
+ *      - A tuple insertion may use an existing prefix tuple
+ *      - A tuple insertion may never create a new prefix tuple
+ *  
+ *  Modifying the prefix slots would be extremely expensive because potentially all tuples slots 
+ *  would have to change their prefix slot pointers. All prefixes are recomputed during a reorg 
+ *  or compaction.
+ */
 public interface IPrefixSlotManager extends ISlotManager {
     // TODO: Clean up interface after extending ISlotManager.
-	
+
     public int decodeFirstSlotField(int slot);
 
     public int decodeSecondSlotField(int slot);
@@ -57,7 +56,9 @@
 
     public int insertSlot(int slot, int tupleOff);
 
-    // returns prefix slot number, returns TUPLE_UNCOMPRESSED if none found
+    /** 
+     * @return the prefix slot number or FieldPrefixSlotManager.TUPLE_UNCOMPRESSED if none found
+     */
     public int findPrefix(ITupleReference tuple, ITreeIndexTupleReference framePrefixTuple);
 
     public int getTupleSlotStartOff();
@@ -78,6 +79,6 @@
 
     // functions for testing
     public void setPrefixSlot(int tupleIndex, int slot);
-    
+
     public void setMultiComparator(MultiComparator cmp);
 }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/ITupleAcceptor.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/ITupleAcceptor.java
new file mode 100644
index 0000000..5f4b30a
--- /dev/null
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/ITupleAcceptor.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.btree.api;
+
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+
+public interface ITupleAcceptor {
+    public boolean accept(ITupleReference tuple);
+}
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/compressors/FieldPrefixCompressor.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/compressors/FieldPrefixCompressor.java
index f78b6e4..7e27113 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/compressors/FieldPrefixCompressor.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/compressors/FieldPrefixCompressor.java
@@ -33,15 +33,13 @@
 
 public class FieldPrefixCompressor implements ITreeIndexFrameCompressor {
 
-    // minimum ratio of uncompressed tuples to total tuple to consider
-    // re-compression
-    private float ratioThreshold;
+    // minimum ratio of uncompressed tuples to total tuple to consider re-compression
+    private final float ratioThreshold;
 
-    // minimum number of tuple matching field prefixes to consider compressing
-    // them
-    private int occurrenceThreshold;
+    // minimum number of tuple matching field prefixes to consider compressing them
+    private final int occurrenceThreshold;
 
-    private ITypeTraits[] typeTraits;
+    private final ITypeTraits[] typeTraits;
 
     public FieldPrefixCompressor(ITypeTraits[] typeTraits, float ratioThreshold, int occurrenceThreshold) {
         this.typeTraits = typeTraits;
@@ -51,8 +49,8 @@
 
     @Override
     public boolean compress(ITreeIndexFrame indexFrame, MultiComparator cmp) throws Exception {
-        BTreeFieldPrefixNSMLeafFrame frame = (BTreeFieldPrefixNSMLeafFrame)indexFrame;
-    	int tupleCount = frame.getTupleCount();
+        BTreeFieldPrefixNSMLeafFrame frame = (BTreeFieldPrefixNSMLeafFrame) indexFrame;
+        int tupleCount = frame.getTupleCount();
         if (tupleCount <= 0) {
             frame.setPrefixTupleCount(0);
             frame.setFreeSpaceOff(frame.getOrigFreeSpaceOff());
@@ -63,7 +61,7 @@
         if (cmp.getKeyFieldCount() == 1) {
             return false;
         }
-        
+
         int uncompressedTupleCount = frame.getUncompressedTupleCount();
         float ratio = (float) uncompressedTupleCount / (float) tupleCount;
         if (ratio < ratioThreshold)
@@ -74,7 +72,7 @@
 
         ByteBuffer buf = frame.getBuffer();
         byte[] pageArray = buf.array();
-        IPrefixSlotManager slotManager = frame.slotManager;
+        IPrefixSlotManager slotManager = (IPrefixSlotManager) frame.getSlotManager();
 
         // perform analysis pass
         ArrayList<KeyPartition> keyPartitions = getKeyPartitions(frame, cmp, occurrenceThreshold);
@@ -95,8 +93,7 @@
                 }
             }
 
-            // ignore keyPartitions with no benefit and don't count bytes and
-            // slots needed
+            // ignore keyPartitions with no benefit and don't count bytes and slots needed
             if (kp.maxBenefitMinusCost <= 0)
                 continue;
 
@@ -104,12 +101,9 @@
             totalSlotsNeeded += kp.pmi[kp.maxPmiIndex].prefixSlotsNeeded;
         }
 
-        // System.out.println("TOTAL SLOTS NEEDED: " + totalSlotsNeeded);
-
         // we use a greedy heuristic to solve this "knapsack"-like problem
         // (every keyPartition has a space savings and a number of slots
-        // required, but the number of slots are constrained by
-        // MAX_PREFIX_SLOTS)
+        // required, but the number of slots are constrained by MAX_PREFIX_SLOTS)
         // we sort the keyPartitions by maxBenefitMinusCost / prefixSlotsNeeded
         // and later choose the top MAX_PREFIX_SLOTS
         int[] newPrefixSlots;
@@ -139,8 +133,7 @@
                 keyPartitions.remove(lastIndex);
             }
 
-            // re-order keyPartitions by prefix (corresponding to original
-            // order)
+            // re-order keyPartitions by prefix (corresponding to original order)
             SortByOriginalRank originalRankComparator = new SortByOriginalRank();
             Collections.sort(keyPartitions, originalRankComparator);
         } else {
@@ -150,8 +143,7 @@
         int[] newTupleSlots = new int[tupleCount];
 
         // WARNING: our hope is that compression is infrequent
-        // here we allocate a big chunk of memory to temporary hold the new,
-        // re-compressed tuple
+        // here we allocate a big chunk of memory to temporary hold the new, re-compressed tuple
         // in general it is very hard to avoid this step
         int prefixFreeSpace = frame.getOrigFreeSpaceOff();
         int tupleFreeSpace = prefixFreeSpace + totalPrefixBytes;
@@ -159,8 +151,8 @@
         ByteBuffer byteBuffer = ByteBuffer.wrap(buffer);
 
         // perform compression, and reorg
-        // we assume that the keyPartitions are sorted by the prefixes (i.e., in
-        // the logical target order)
+        // we assume that the keyPartitions are sorted by the prefixes 
+        // (i.e., in the logical target order)
         int kpIndex = 0;
         int tupleIndex = 0;
         int prefixTupleIndex = 0;
@@ -176,19 +168,13 @@
                 // beginning of keyPartition found, compress entire keyPartition
                 if (tupleIndex == keyPartitions.get(kpIndex).firstTupleIndex) {
 
-                    // number of fields we decided to use for compression of
-                    // this keyPartition
+                    // number of fields we decided to use for compression of this keyPartition
                     int fieldCountToCompress = keyPartitions.get(kpIndex).maxPmiIndex + 1;
                     int segmentStart = keyPartitions.get(kpIndex).firstTupleIndex;
                     int tuplesInSegment = 1;
 
-                    // System.out.println("PROCESSING KEYPARTITION: " + kpIndex
-                    // + " RANGE: " + keyPartitions.get(kpIndex).firstRecSlotNum
-                    // + " " + keyPartitions.get(kpIndex).lastRecSlotNum +
-                    // " FIELDSTOCOMPRESS: " + fieldCountToCompress);
-
-                    FieldPrefixTupleReference prevTuple = new FieldPrefixTupleReference(tupleWriter
-                            .createTupleReference());
+                    FieldPrefixTupleReference prevTuple = new FieldPrefixTupleReference(
+                            tupleWriter.createTupleReference());
                     prevTuple.setFieldCount(fieldCount);
 
                     FieldPrefixTupleReference tuple = new FieldPrefixTupleReference(tupleWriter.createTupleReference());
@@ -198,8 +184,7 @@
                         prevTuple.resetByTupleIndex(frame, i - 1);
                         tuple.resetByTupleIndex(frame, i);
 
-                        // check if tuples match in fieldCountToCompress of their
-                        // first fields
+                        // check if tuples match in fieldCountToCompress of their first fields
                         int prefixFieldsMatch = 0;
                         for (int j = 0; j < fieldCountToCompress; j++) {
                             if (cmps[j].compare(pageArray, prevTuple.getFieldStart(j), prevTuple.getFieldLength(j),
@@ -209,8 +194,8 @@
                                 break;
                         }
 
-                        // the two tuples must match in exactly the number of
-                        // fields we decided to compress for this keyPartition
+                        // the two tuples must match in exactly the number of fields we decided 
+                        // to compress for this keyPartition
                         int processSegments = 0;
                         if (prefixFieldsMatch == fieldCountToCompress)
                             tuplesInSegment++;
@@ -221,12 +206,10 @@
                             processSegments++;
 
                         for (int r = 0; r < processSegments; r++) {
-                            // compress current segment and then start new
-                            // segment
+                            // compress current segment and then start new segment
                             if (tuplesInSegment < occurrenceThreshold || fieldCountToCompress <= 0) {
-                                // segment does not have at least
-                                // occurrenceThreshold tuples, so write tuples
-                                // uncompressed
+                                // segment does not have at least occurrenceThreshold tuples, so 
+                                // write tuples uncompressed
                                 for (int j = 0; j < tuplesInSegment; j++) {
                                     int slotNum = segmentStart + j;
                                     tupleToWrite.resetByTupleIndex(frame, slotNum);
@@ -236,29 +219,14 @@
                                 }
                                 uncompressedTupleCount += tuplesInSegment;
                             } else {
-                                // segment has enough tuples, compress segment
-                                // extract prefix, write prefix tuple to buffer,
-                                // and set prefix slot
+                                // segment has enough tuples: compress segment, extract prefix, 
+                                // write prefix tuple to buffer, and set prefix slot
                                 newPrefixSlots[newPrefixSlots.length - 1 - prefixTupleIndex] = slotManager
                                         .encodeSlotFields(fieldCountToCompress, prefixFreeSpace);
-                                // int tmp = freeSpace;
-                                // prevRec.reset();
-                                // System.out.println("SOURCE CONTENTS: " +
-                                // buf.getInt(prevRec.getFieldOff()) + " " +
-                                // buf.getInt(prevRec.getFieldOff()+4));
                                 prefixFreeSpace += tupleWriter.writeTupleFields(prevTuple, 0, fieldCountToCompress,
                                         byteBuffer.array(), prefixFreeSpace);
-                                // System.out.println("WRITING PREFIX RECORD " +
-                                // prefixSlotNum + " AT " + tmp + " " +
-                                // freeSpace);
-                                // System.out.print("CONTENTS: ");
-                                // for(int x = 0; x < fieldCountToCompress; x++)
-                                // System.out.print(buf.getInt(tmp + x*4) +
-                                // " ");
-                                // System.out.println();
 
-                                // truncate tuples, write them to buffer, and
-                                // set tuple slots
+                                // truncate tuples, write them to buffer, and set tuple slots
                                 for (int j = 0; j < tuplesInSegment; j++) {
                                     int currTupleIndex = segmentStart + j;
                                     tupleToWrite.resetByTupleIndex(frame, currTupleIndex);
@@ -298,27 +266,24 @@
             tupleIndex++;
         }
 
-        // sanity check to see if we have written exactly as many prefix bytes
-        // as computed before
+        // sanity check to see if we have written exactly as many prefix bytes as computed before
         if (prefixFreeSpace != frame.getOrigFreeSpaceOff() + totalPrefixBytes) {
             throw new Exception("ERROR: Number of prefix bytes written don't match computed number");
         }
 
-        // in some rare instances our procedure could even increase the space
-        // requirement which is very dangerous
-        // this can happen to to the greedy solution of the knapsack-like
-        // problem
-        // therefore, we check if the new space exceeds the page size to avoid
-        // the only danger of an increasing space
+        // in some rare instances our procedure could even increase the space requirement which is very dangerous
+        // this can happen to to the greedy solution of the knapsack-like problem
+        // therefore, we check if the new space exceeds the page size to avoid the only danger of 
+        // an increasing space
         int totalSpace = tupleFreeSpace + newTupleSlots.length * slotManager.getSlotSize() + newPrefixSlots.length
                 * slotManager.getSlotSize();
         if (totalSpace > buf.capacity())
-            return false; // just leave the page as is
+            // just leave the page as is
+            return false;
 
         // copy new tuple and new slots into original page
         int freeSpaceAfterInit = frame.getOrigFreeSpaceOff();
-        System.arraycopy(buffer, freeSpaceAfterInit, pageArray, freeSpaceAfterInit, tupleFreeSpace
-                        - freeSpaceAfterInit);
+        System.arraycopy(buffer, freeSpaceAfterInit, pageArray, freeSpaceAfterInit, tupleFreeSpace - freeSpaceAfterInit);
 
         // copy prefix slots
         int slotOffRunner = buf.capacity() - slotManager.getSlotSize();
@@ -333,22 +298,6 @@
             slotOffRunner -= slotManager.getSlotSize();
         }
 
-        // int originalFreeSpaceOff = frame.getOrigFreeSpaceOff();
-        // System.out.println("ORIGINALFREESPACE: " + originalFreeSpaceOff);
-        // System.out.println("RECSPACE BEF: " + (frame.getFreeSpaceOff() -
-        // originalFreeSpaceOff));
-        // System.out.println("RECSPACE AFT: " + (recordFreeSpace -
-        // originalFreeSpaceOff));
-        // System.out.println("PREFIXSLOTS BEF: " +
-        // frame.getNumPrefixRecords());
-        // System.out.println("PREFIXSLOTS AFT: " + newPrefixSlots.length);
-        //        
-        // System.out.println("FREESPACE BEF: " + frame.getFreeSpaceOff());
-        // System.out.println("FREESPACE AFT: " + recordFreeSpace);
-        // System.out.println("PREFIXES: " + newPrefixSlots.length + " / " +
-        // FieldPrefixSlotManager.MAX_PREFIX_SLOTS);
-        // System.out.println("RECORDS: " + newRecordSlots.length);
-
         // update space fields, TODO: we need to update more fields
         frame.setFreeSpaceOff(tupleFreeSpace);
         frame.setPrefixTupleCount(newPrefixSlots.length);
@@ -377,7 +326,7 @@
         int maxCmps = cmps.length - 1;
         ByteBuffer buf = frame.getBuffer();
         byte[] pageArray = buf.array();
-        IPrefixSlotManager slotManager = frame.slotManager;
+        IPrefixSlotManager slotManager = (IPrefixSlotManager) frame.getSlotManager();
 
         ArrayList<KeyPartition> keyPartitions = new ArrayList<KeyPartition>();
         KeyPartition kp = new KeyPartition(maxCmps);
@@ -397,10 +346,6 @@
             prevTuple.resetByTupleIndex(frame, i - 1);
             tuple.resetByTupleIndex(frame, i);
 
-            // System.out.println("BEFORE RECORD: " + i + " " + rec.recSlotOff +
-            // " " + rec.recOff);
-            // kp.print();
-
             int prefixFieldsMatch = 0;
             for (int j = 0; j < maxCmps; j++) {
 
@@ -415,16 +360,15 @@
                                     - prefixFieldsMatch);
 
                     if (kp.pmi[j].matches == occurrenceThreshold) {
-                        // if we compress this prefix, we pay the cost of
-                        // storing it once, plus the size for one prefix slot
+                        // if we compress this prefix, we pay the cost of storing it once, plus 
+                        // the size for one prefix slot
                         kp.pmi[j].prefixBytes += prefixBytes;
                         kp.pmi[j].spaceCost += prefixBytes + slotManager.getSlotSize();
                         kp.pmi[j].prefixSlotsNeeded++;
                         kp.pmi[j].spaceBenefit += occurrenceThreshold * spaceBenefit;
                     } else if (kp.pmi[j].matches > occurrenceThreshold) {
-                        // we are beyond the occurrence threshold, every
-                        // additional tuple with a matching prefix increases the
-                        // benefit
+                        // we are beyond the occurrence threshold, every additional tuple with a 
+                        // matching prefix increases the benefit
                         kp.pmi[j].spaceBenefit += spaceBenefit;
                     }
                 } else {
@@ -433,15 +377,8 @@
                 }
             }
 
-            // System.out.println();
-            // System.out.println("AFTER RECORD: " + i);
-            // kp.print();
-            // System.out.println("-----------------");
-
-            // this means not even the first field matched, so we start to
-            // consider a new "key partition"
+            // this means not even the first field matched, so we start to consider a new "key partition"
             if (maxCmps > 0 && prefixFieldsMatch == 0) {
-                // System.out.println("NEW KEY PARTITION");
                 kp.lastTupleIndex = i - 1;
 
                 // remove keyPartitions that don't have enough tuples
@@ -478,7 +415,6 @@
         public int maxPmiIndex = -1;
 
         // number of fields used for compression for this kp of current page
-
         public KeyPartition(int numKeyFields) {
             pmi = new PrefixMatchInfo[numKeyFields];
             for (int i = 0; i < numKeyFields; i++) {
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeDataflowHelper.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeDataflowHelper.java
index 699915d..982f0ed 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeDataflowHelper.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeDataflowHelper.java
@@ -21,6 +21,7 @@
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeUtils;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
 
@@ -31,10 +32,11 @@
 
     @Override
     public ITreeIndex createIndexInstance() throws HyracksDataException {
+        AbstractTreeIndexOperatorDescriptor treeOpDesc = (AbstractTreeIndexOperatorDescriptor) opDesc;
         try {
-            return BTreeUtils.createBTree(opDesc.getStorageManager().getBufferCache(ctx), opDesc
-                    .getOpCallbackProvider().getOperationCallback(), treeOpDesc.getTreeIndexTypeTraits(), treeOpDesc
-                    .getTreeIndexComparatorFactories(), BTreeLeafFrameType.REGULAR_NSM);
+            return BTreeUtils.createBTree(opDesc.getStorageManager().getBufferCache(ctx), opDesc.getStorageManager()
+                    .getFileMapProvider(ctx), treeOpDesc.getTreeIndexTypeTraits(), treeOpDesc
+                    .getTreeIndexComparatorFactories(), BTreeLeafFrameType.REGULAR_NSM, file);
         } catch (BTreeException e) {
             throw new HyracksDataException(e);
         }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeSearchOperatorDescriptor.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeSearchOperatorDescriptor.java
index f403312..c56308b 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeSearchOperatorDescriptor.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeSearchOperatorDescriptor.java
@@ -23,32 +23,34 @@
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
 
 public class BTreeSearchOperatorDescriptor extends AbstractTreeIndexOperatorDescriptor {
 
     private static final long serialVersionUID = 1L;
 
-    // fields in input tuple to be used as low keys
-    protected int[] lowKeyFields;
-    // fields in input tuple to be used as high keys
-    protected int[] highKeyFields;
-    protected boolean lowKeyInclusive;
-    protected boolean highKeyInclusive;
+    protected final int[] lowKeyFields;
+    protected final int[] highKeyFields;
+    protected final boolean lowKeyInclusive;
+    protected final boolean highKeyInclusive;
 
     public BTreeSearchOperatorDescriptor(IOperatorDescriptorRegistry spec, RecordDescriptor recDesc,
-            IStorageManagerInterface storageManager, IIndexRegistryProvider<IIndex> indexRegistryProvider,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lifecycleManagerProvider,
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
-            IBinaryComparatorFactory[] comparatorFactories, int[] lowKeyFields, int[] highKeyFields,
-            boolean lowKeyInclusive, boolean highKeyInclusive, IIndexDataflowHelperFactory dataflowHelperFactory,
-            boolean retainInput, IOperationCallbackProvider opCallbackProvider) {
-        super(spec, 1, 1, recDesc, storageManager, indexRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, dataflowHelperFactory, null, retainInput, opCallbackProvider);
+            IBinaryComparatorFactory[] comparatorFactories, int[] bloomFilterKeyFields, int[] lowKeyFields,
+            int[] highKeyFields, boolean lowKeyInclusive, boolean highKeyInclusive,
+            IIndexDataflowHelperFactory dataflowHelperFactory, boolean retainInput,
+            ISearchOperationCallbackFactory searchOpCallbackProvider) {
+        super(spec, 1, 1, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, bloomFilterKeyFields, dataflowHelperFactory, null, retainInput,
+                NoOpLocalResourceFactoryProvider.INSTANCE, searchOpCallbackProvider,
+                NoOpOperationCallbackFactory.INSTANCE);
         this.lowKeyFields = lowKeyFields;
         this.highKeyFields = highKeyFields;
         this.lowKeyInclusive = lowKeyInclusive;
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeSearchOperatorNodePushable.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeSearchOperatorNodePushable.java
index b284847..dc5d161 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeSearchOperatorNodePushable.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeSearchOperatorNodePushable.java
@@ -19,16 +19,18 @@
 import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeUtils;
 import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.PermutingFrameTupleReference;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexSearchOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexSearchOperatorNodePushable;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingFrameTupleReference;
 
-public class BTreeSearchOperatorNodePushable extends TreeIndexSearchOperatorNodePushable {
+public class BTreeSearchOperatorNodePushable extends IndexSearchOperatorNodePushable {
+    protected final boolean lowKeyInclusive;
+    protected final boolean highKeyInclusive;
+
     protected PermutingFrameTupleReference lowKey;
     protected PermutingFrameTupleReference highKey;
-    protected boolean lowKeyInclusive;
-    protected boolean highKeyInclusive;
     protected MultiComparator lowKeySearchCmp;
     protected MultiComparator highKeySearchCmp;
 
@@ -60,6 +62,7 @@
 
     @Override
     protected ISearchPredicate createSearchPredicate() {
+        ITreeIndex treeIndex = (ITreeIndex) index;
         lowKeySearchCmp = BTreeUtils.getSearchMultiComparator(treeIndex.getComparatorFactories(), lowKey);
         highKeySearchCmp = BTreeUtils.getSearchMultiComparator(treeIndex.getComparatorFactories(), highKey);
         return new RangePredicate(lowKey, highKey, lowKeyInclusive, highKeyInclusive, lowKeySearchCmp, highKeySearchCmp);
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeUpdateSearchOperatorDescriptor.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeUpdateSearchOperatorDescriptor.java
index 1fc5cb8..f13ecae 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeUpdateSearchOperatorDescriptor.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeUpdateSearchOperatorDescriptor.java
@@ -23,11 +23,10 @@
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITupleUpdaterFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
 public class BTreeUpdateSearchOperatorDescriptor extends BTreeSearchOperatorDescriptor {
@@ -37,14 +36,15 @@
     private final ITupleUpdaterFactory tupleUpdaterFactory;
 
     public BTreeUpdateSearchOperatorDescriptor(IOperatorDescriptorRegistry spec, RecordDescriptor recDesc,
-            IStorageManagerInterface storageManager, IIndexRegistryProvider<IIndex> indexRegistryProvider,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lifecycleManagerProvider,
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
-            IBinaryComparatorFactory[] comparatorFactories, int[] lowKeyFields, int[] highKeyFields,
-            boolean lowKeyInclusive, boolean highKeyInclusive, IIndexDataflowHelperFactory dataflowHelperFactory,
-            boolean retainInput, IOperationCallbackProvider opCallbackProvider, ITupleUpdaterFactory tupleUpdaterFactory) {
-        super(spec, recDesc, storageManager, indexRegistryProvider, fileSplitProvider, typeTraits, comparatorFactories,
-                lowKeyFields, highKeyFields, lowKeyInclusive, highKeyInclusive, dataflowHelperFactory,
-                retainInput, opCallbackProvider);
+            IBinaryComparatorFactory[] comparatorFactories, int[] bloomFilterKeyFields, int[] lowKeyFields,
+            int[] highKeyFields, boolean lowKeyInclusive, boolean highKeyInclusive,
+            IIndexDataflowHelperFactory dataflowHelperFactory, boolean retainInput,
+            ISearchOperationCallbackFactory searchOpCallbackProvider, ITupleUpdaterFactory tupleUpdaterFactory) {
+        super(spec, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, bloomFilterKeyFields, lowKeyFields, highKeyFields, lowKeyInclusive,
+                highKeyInclusive, dataflowHelperFactory, retainInput, searchOpCallbackProvider);
         this.tupleUpdaterFactory = tupleUpdaterFactory;
     }
 
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeUpdateSearchOperatorNodePushable.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeUpdateSearchOperatorNodePushable.java
index 1141639..648e523 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeUpdateSearchOperatorNodePushable.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeUpdateSearchOperatorNodePushable.java
@@ -21,7 +21,9 @@
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
 import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeRangeSearchCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.api.ITupleUpdater;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
 
@@ -38,6 +40,8 @@
 
     @Override
     protected ITreeIndexCursor createCursor() {
+        ITreeIndex treeIndex = (ITreeIndex) index;
+        ITreeIndexFrame cursorFrame = treeIndex.getLeafFrameFactory().createFrame();
         return new BTreeRangeSearchCursor((IBTreeLeafFrame) cursorFrame, true);
     }
 
@@ -47,9 +51,9 @@
             tb.reset();
             cursor.next();
             if (retainInput) {
-            	frameTuple.reset(accessor, tupleIndex);
+                frameTuple.reset(accessor, tupleIndex);
                 for (int i = 0; i < frameTuple.getFieldCount(); i++) {
-                	dos.write(frameTuple.getFieldData(i), frameTuple.getFieldStart(i), frameTuple.getFieldLength(i));
+                    dos.write(frameTuple.getFieldData(i), frameTuple.getFieldStart(i), frameTuple.getFieldLength(i));
                     tb.addFieldEndOffset();
                 }
             }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/exceptions/BTreeDuplicateKeyException.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/exceptions/BTreeDuplicateKeyException.java
index d6d945f..5a1d610 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/exceptions/BTreeDuplicateKeyException.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/exceptions/BTreeDuplicateKeyException.java
@@ -17,11 +17,11 @@
 
 public class BTreeDuplicateKeyException extends BTreeException {
     private static final long serialVersionUID = 1L;
-    
+
     public BTreeDuplicateKeyException(Exception e) {
         super(e);
     }
-    
+
     public BTreeDuplicateKeyException(String message) {
         super(message);
     }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/exceptions/BTreeNonExistentKeyException.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/exceptions/BTreeNonExistentKeyException.java
index 81a0e79..989f118 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/exceptions/BTreeNonExistentKeyException.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/exceptions/BTreeNonExistentKeyException.java
@@ -16,13 +16,13 @@
 package edu.uci.ics.hyracks.storage.am.btree.exceptions;
 
 public class BTreeNonExistentKeyException extends BTreeException {
-    
+
     private static final long serialVersionUID = 1L;
-    
+
     public BTreeNonExistentKeyException(Exception e) {
         super(e);
     }
-    
+
     public BTreeNonExistentKeyException(String message) {
         super(message);
     }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/exceptions/BTreeNotUpdateableException.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/exceptions/BTreeNotUpdateableException.java
index 73b22d8..7e83c69 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/exceptions/BTreeNotUpdateableException.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/exceptions/BTreeNotUpdateableException.java
@@ -17,11 +17,11 @@
 
 public class BTreeNotUpdateableException extends BTreeException {
     private static final long serialVersionUID = 1L;
-    
+
     public BTreeNotUpdateableException(Exception e) {
         super(e);
     }
-    
+
     public BTreeNotUpdateableException(String message) {
         super(message);
     }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeFieldPrefixNSMLeafFrame.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeFieldPrefixNSMLeafFrame.java
index fb2e833..354aa1e 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeFieldPrefixNSMLeafFrame.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeFieldPrefixNSMLeafFrame.java
@@ -27,10 +27,10 @@
 import edu.uci.ics.hyracks.storage.am.btree.compressors.FieldPrefixCompressor;
 import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeDuplicateKeyException;
 import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeNonExistentKeyException;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeOpContext.PageValidationInfo;
 import edu.uci.ics.hyracks.storage.am.btree.impls.FieldPrefixPrefixTupleReference;
 import edu.uci.ics.hyracks.storage.am.btree.impls.FieldPrefixSlotManager;
 import edu.uci.ics.hyracks.storage.am.btree.impls.FieldPrefixTupleReference;
-import edu.uci.ics.hyracks.storage.am.common.api.ISlotManager;
 import edu.uci.ics.hyracks.storage.am.common.api.ISplitKey;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameCompressor;
@@ -45,8 +45,9 @@
 import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriter;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
 
-// WARNING: only works when tupleWriter is an instance of TypeAwareTupleWriter
-
+/**
+ * WARNING: only works when tupleWriter is an instance of TypeAwareTupleWriter
+ */
 public class BTreeFieldPrefixNSMLeafFrame implements IBTreeLeafFrame {
 
     protected static final int pageLsnOff = 0; // 0
@@ -57,28 +58,26 @@
     protected static final int smFlagOff = levelOff + 1; // 21
     protected static final int uncompressedTupleCountOff = smFlagOff + 1; // 22
     protected static final int prefixTupleCountOff = uncompressedTupleCountOff + 4; // 26
-
     protected static final int nextLeafOff = prefixTupleCountOff + 4; // 30
 
+    private final IPrefixSlotManager slotManager;
+    private final ITreeIndexFrameCompressor compressor;
+    private final FieldPrefixTupleReference frameTuple;
+    private final FieldPrefixPrefixTupleReference framePrefixTuple;
+    private final ITreeIndexTupleWriter tupleWriter;
+
+    private MultiComparator cmp;
+
     protected ICachedPage page = null;
     protected ByteBuffer buf = null;
 
-    public final ITreeIndexFrameCompressor compressor;
-    // TODO: Should be protected, but will trigger some refactoring.
-    public final IPrefixSlotManager slotManager;
-
-    private final ITreeIndexTupleWriter tupleWriter;
-    private MultiComparator cmp;
-    
-    private final FieldPrefixTupleReference frameTuple;
-    private final FieldPrefixPrefixTupleReference framePrefixTuple;
-
     public BTreeFieldPrefixNSMLeafFrame(ITreeIndexTupleWriter tupleWriter) {
         this.tupleWriter = tupleWriter;
         this.frameTuple = new FieldPrefixTupleReference(tupleWriter.createTupleReference());
+        this.slotManager = new FieldPrefixSlotManager();
+
         ITypeTraits[] typeTraits = ((TypeAwareTupleWriter) tupleWriter).getTypeTraits();
         this.framePrefixTuple = new FieldPrefixPrefixTupleReference(typeTraits);
-        this.slotManager = new FieldPrefixSlotManager();
         this.compressor = new FieldPrefixCompressor(typeTraits, 0.001f, 2);
     }
 
@@ -108,19 +107,18 @@
         }
     }
 
-    // assumptions:
-    // 1. prefix tuple are stored contiguously
-    // 2. prefix tuple are located before tuples (physically on the page)
-    // 3. prefix tuple are sorted (last prefix tuple is at highest offset)
-    // this procedure will not move prefix tuples
+    // Assumptions:
+    // 1) prefix tuples are stored contiguously
+    // 2) prefix tuples are located before tuples (physically on the page)
+    // 3) prefix tuples are sorted (last prefix tuple is at highest offset)
+    // This procedure will not move prefix tuples.
     @Override
     public boolean compact() {
         resetSpaceParams();
 
         int tupleCount = buf.getInt(tupleCountOff);
 
-        // determine start of target free space (depends on assumptions stated
-        // above)
+        // determine start of target free space (depends on assumptions stated above)
         int freeSpace = buf.getInt(freeSpaceOff);
         int prefixTupleCount = buf.getInt(prefixTupleCountOff);
         if (prefixTupleCount > 0) {
@@ -185,8 +183,7 @@
         int length = tupleSlotOff - slotEndOff;
         System.arraycopy(buf.array(), slotEndOff, buf.array(), slotEndOff + slotManager.getSlotSize(), length);
 
-        // maintain space information, get size of tuple suffix (suffix
-        // could be entire tuple)
+        // maintain space information, get size of tuple suffix (suffix could be entire tuple)
         int tupleSize = 0;
         int suffixFieldStart = 0;
         if (prefixSlotNum == FieldPrefixSlotManager.TUPLE_UNCOMPRESSED) {
@@ -257,37 +254,37 @@
         buf.putInt(freeSpaceOff, buf.getInt(freeSpaceOff) + bytesWritten);
         buf.putInt(totalFreeSpaceOff, buf.getInt(totalFreeSpaceOff) - bytesWritten - slotManager.getSlotSize());
     }
-    
+
     @Override
     public FrameOpSpaceStatus hasSpaceUpdate(ITupleReference newTuple, int oldTupleIndex) {
         int tupleIndex = slotManager.decodeSecondSlotField(oldTupleIndex);
         frameTuple.resetByTupleIndex(this, tupleIndex);
-        
+
         int oldTupleBytes = 0;
         int newTupleBytes = 0;
-        
+
         int numPrefixFields = frameTuple.getNumPrefixFields();
         int fieldCount = frameTuple.getFieldCount();
         if (numPrefixFields != 0) {
-            // Check the space requirements for updating the suffix of the original tuple.            
+            // Check the space requirements for updating the suffix of the original tuple.
             oldTupleBytes = frameTuple.getSuffixTupleSize();
-            newTupleBytes = tupleWriter.bytesRequired(newTuple, numPrefixFields, fieldCount - numPrefixFields); 
+            newTupleBytes = tupleWriter.bytesRequired(newTuple, numPrefixFields, fieldCount - numPrefixFields);
         } else {
             // The original tuple is uncompressed.
             oldTupleBytes = frameTuple.getTupleSize();
             newTupleBytes = tupleWriter.bytesRequired(newTuple);
         }
-        
+
         int additionalBytesRequired = newTupleBytes - oldTupleBytes;
         // Enough space for an in-place update?
         if (additionalBytesRequired <= 0) {
             return FrameOpSpaceStatus.SUFFICIENT_INPLACE_SPACE;
         }
-        
+
         int freeContiguous = buf.capacity() - buf.getInt(freeSpaceOff)
                 - ((buf.getInt(tupleCountOff) + buf.getInt(prefixTupleCountOff)) * slotManager.getSlotSize());
-        
-        // Enough space if we delete the old tuple and insert the new one without compaction? 
+
+        // Enough space if we delete the old tuple and insert the new one without compaction?
         if (newTupleBytes <= freeContiguous) {
             return FrameOpSpaceStatus.SUFFICIENT_CONTIGUOUS_SPACE;
         }
@@ -304,21 +301,24 @@
         int tupleSlotOff = slotManager.getTupleSlotOff(tupleIndex);
         int tupleSlot = buf.getInt(tupleSlotOff);
         int prefixSlotNum = slotManager.decodeFirstSlotField(tupleSlot);
-        int suffixTupleStartOff = slotManager.decodeSecondSlotField(tupleSlot);                
-        
+        int suffixTupleStartOff = slotManager.decodeSecondSlotField(tupleSlot);
+
         frameTuple.resetByTupleIndex(this, tupleIndex);
         int fieldCount = frameTuple.getFieldCount();
         int numPrefixFields = frameTuple.getNumPrefixFields();
         int oldTupleBytes = frameTuple.getSuffixTupleSize();
-        int bytesWritten = 0;        
-        
+        int bytesWritten = 0;
+
         if (inPlace) {
             // Overwrite the old tuple suffix in place.
-            bytesWritten = tupleWriter.writeTupleFields(newTuple, numPrefixFields, fieldCount - numPrefixFields, buf.array(), suffixTupleStartOff);
+            bytesWritten = tupleWriter.writeTupleFields(newTuple, numPrefixFields, fieldCount - numPrefixFields,
+                    buf.array(), suffixTupleStartOff);
         } else {
-            // Insert the new tuple suffix at the end of the free space, and change the slot value (effectively "deleting" the old tuple).
+            // Insert the new tuple suffix at the end of the free space, and change
+            // the slot value (effectively "deleting" the old tuple).
             int newSuffixTupleStartOff = buf.getInt(freeSpaceOff);
-            bytesWritten = tupleWriter.writeTupleFields(newTuple, numPrefixFields, fieldCount - numPrefixFields, buf.array(), newSuffixTupleStartOff);
+            bytesWritten = tupleWriter.writeTupleFields(newTuple, numPrefixFields, fieldCount - numPrefixFields,
+                    buf.array(), newSuffixTupleStartOff);
             // Update slot value using the same prefix slot num.
             slotManager.setSlot(tupleSlotOff, slotManager.encodeSlotFields(prefixSlotNum, newSuffixTupleStartOff));
             // Update contiguous free space pointer.
@@ -326,7 +326,7 @@
         }
         buf.putInt(totalFreeSpaceOff, buf.getInt(totalFreeSpaceOff) + oldTupleBytes - bytesWritten);
     }
-    
+
     protected void resetSpaceParams() {
         buf.putInt(freeSpaceOff, getOrigFreeSpaceOff());
         buf.putInt(totalFreeSpaceOff, getOrigTotalFreeSpace());
@@ -355,8 +355,8 @@
 
     @Override
     public int findInsertTupleIndex(ITupleReference tuple) throws TreeIndexException {
-    	int slot = slotManager.findSlot(tuple, frameTuple, framePrefixTuple, cmp, FindTupleMode.EXCLUSIVE_ERROR_IF_EXISTS,
-                FindTupleNoExactMatchPolicy.HIGHER_KEY);
+        int slot = slotManager.findSlot(tuple, frameTuple, framePrefixTuple, cmp,
+                FindTupleMode.EXCLUSIVE_ERROR_IF_EXISTS, FindTupleNoExactMatchPolicy.HIGHER_KEY);
         int tupleIndex = slotManager.decodeSecondSlotField(slot);
         // Error indicator is set if there is an exact match.
         if (tupleIndex == slotManager.getErrorIndicator()) {
@@ -364,7 +364,7 @@
         }
         return slot;
     }
-    
+
     @Override
     public int findUpsertTupleIndex(ITupleReference tuple) throws TreeIndexException {
         int slot = slotManager.findSlot(tuple, frameTuple, framePrefixTuple, cmp, FindTupleMode.INCLUSIVE,
@@ -376,15 +376,15 @@
         }
         return slot;
     }
-    
+
     @Override
-    public ITupleReference getUpsertBeforeTuple(ITupleReference tuple, int targetTupleIndex) throws TreeIndexException {
+    public ITupleReference getMatchingKeyTuple(ITupleReference searchTuple, int targetTupleIndex) {
         int tupleIndex = slotManager.decodeSecondSlotField(targetTupleIndex);
         // Examine the tuple index to determine whether it is valid or not.
         if (tupleIndex != slotManager.getGreatestKeyIndicator()) {
             // We need to check the key to determine whether it's an insert or an update.
             frameTuple.resetByTupleIndex(this, tupleIndex);
-            if (cmp.compare(tuple, frameTuple) == 0) {
+            if (cmp.compare(searchTuple, frameTuple) == 0) {
                 // The keys match, it's an update.
                 return frameTuple;
             }
@@ -393,7 +393,7 @@
         // In those cases, we are definitely dealing with an insert.
         return null;
     }
-    
+
     @Override
     public int findUpdateTupleIndex(ITupleReference tuple) throws TreeIndexException {
         int slot = slotManager.findSlot(tuple, frameTuple, framePrefixTuple, cmp, FindTupleMode.EXACT,
@@ -402,10 +402,10 @@
         // Error indicator is set if there is no exact match.
         if (tupleIndex == slotManager.getErrorIndicator()) {
             throw new BTreeNonExistentKeyException("Trying to update a tuple with a nonexistent key in leaf node.");
-        }    
+        }
         return slot;
     }
-    
+
     @Override
     public int findDeleteTupleIndex(ITupleReference tuple) throws TreeIndexException {
         int slot = slotManager.findSlot(tuple, frameTuple, framePrefixTuple, cmp, FindTupleMode.EXACT,
@@ -414,10 +414,10 @@
         // Error indicator is set if there is no exact match.
         if (tupleIndex == slotManager.getErrorIndicator()) {
             throw new BTreeNonExistentKeyException("Trying to delete a tuple with a nonexistent key in leaf node.");
-        }    
+        }
         return slot;
     }
-    
+
     @Override
     public String printHeader() {
         StringBuilder strBuilder = new StringBuilder();
@@ -438,8 +438,8 @@
         return buf.getInt(tupleCountOff);
     }
 
-    public ISlotManager getSlotManager() {
-        return null;
+    public IPrefixSlotManager getSlotManager() {
+        return slotManager;
     }
 
     @Override
@@ -537,16 +537,16 @@
     }
 
     @Override
-    public void split(ITreeIndexFrame rightFrame, ITupleReference tuple, ISplitKey splitKey)
-    		throws TreeIndexException {
+    public void split(ITreeIndexFrame rightFrame, ITupleReference tuple, ISplitKey splitKey) {
 
-        BTreeFieldPrefixNSMLeafFrame rf = (BTreeFieldPrefixNSMLeafFrame)rightFrame;
+        BTreeFieldPrefixNSMLeafFrame rf = (BTreeFieldPrefixNSMLeafFrame) rightFrame;
 
         ByteBuffer right = rf.getBuffer();
         int tupleCount = getTupleCount();
         int prefixTupleCount = getPrefixTupleCount();
 
-        // Find split point, and determine into which frame the new tuple should be inserted into.
+        // Find split point, and determine into which frame the new tuple should
+        // be inserted into.
         int tuplesToLeft;
         int midSlotNum = tupleCount / 2;
         ITreeIndexFrame targetFrame = null;
@@ -576,8 +576,7 @@
             }
         }
 
-        // if we are splitting in the middle of a prefix both pages need to have
-        // the prefix slot and tuple
+        // if we are splitting in the middle of a prefix both pages need to have the prefix slot and tuple
         int boundaryTupleSlotOff = rf.slotManager.getTupleSlotOff(tuplesToLeft - 1);
         int boundaryTupleSlot = buf.getInt(boundaryTupleSlotOff);
         int boundaryPrefixSlotNum = rf.slotManager.decodeFirstSlotField(boundaryTupleSlot);
@@ -587,8 +586,7 @@
             prefixesToLeft++; // tuples on both pages share one prefix
         }
 
-        // move prefix tuples on right page to beginning of page and adjust
-        // prefix slots
+        // move prefix tuples on right page to beginning of page and adjust prefix slots
         if (prefixesToRight > 0 && prefixesToLeft > 0 && prefixTupleCount > 1) {
 
             int freeSpace = rf.getOrigFreeSpaceOff();
@@ -652,7 +650,13 @@
         rightFrame.compact();
 
         // insert last key
-        int targetTupleIndex = ((IBTreeLeafFrame)targetFrame).findInsertTupleIndex(tuple);
+        int targetTupleIndex;
+        // it's safe to catch this exception since it will have been caught before reaching here
+        try {
+            targetTupleIndex = ((IBTreeLeafFrame) targetFrame).findInsertTupleIndex(tuple);
+        } catch (TreeIndexException e) {
+            throw new IllegalStateException(e);
+        }
         targetFrame.insert(tuple, targetTupleIndex);
 
         // set split key to be highest value in left page
@@ -716,7 +720,8 @@
         int slot = slotManager.findSlot(searchKey, pageTuple, framePrefixTuple, cmp, ftm, ftp);
         int tupleIndex = slotManager.decodeSecondSlotField(slot);
         // TODO: Revisit this one. Maybe there is a cleaner way to solve this in the RangeSearchCursor.
-        if (tupleIndex == FieldPrefixSlotManager.GREATEST_KEY_INDICATOR || tupleIndex == FieldPrefixSlotManager.ERROR_INDICATOR)
+        if (tupleIndex == FieldPrefixSlotManager.GREATEST_KEY_INDICATOR
+                || tupleIndex == FieldPrefixSlotManager.ERROR_INDICATOR)
             return -1;
         else
             return tupleIndex;
@@ -727,9 +732,14 @@
         return nextLeafOff;
     }
 
-	@Override
-	public void setMultiComparator(MultiComparator cmp) {
-		this.cmp = cmp;
-		this.slotManager.setMultiComparator(cmp);
-	}
+    @Override
+    public void setMultiComparator(MultiComparator cmp) {
+        this.cmp = cmp;
+        this.slotManager.setMultiComparator(cmp);
+    }
+
+    @Override
+    public void validate(PageValidationInfo pvi) {
+        // Do nothing
+    }
 }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeFieldPrefixNSMLeafFrameFactory.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeFieldPrefixNSMLeafFrameFactory.java
index 5defb27..79d2f3a 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeFieldPrefixNSMLeafFrameFactory.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeFieldPrefixNSMLeafFrameFactory.java
@@ -22,8 +22,9 @@
 public class BTreeFieldPrefixNSMLeafFrameFactory implements ITreeIndexFrameFactory {
 
     private static final long serialVersionUID = 1L;
+
     private final ITreeIndexTupleWriterFactory tupleWriterFactory;
-    
+
     public BTreeFieldPrefixNSMLeafFrameFactory(ITreeIndexTupleWriterFactory tupleWriterFactory) {
         this.tupleWriterFactory = tupleWriterFactory;
     }
@@ -35,6 +36,6 @@
 
     @Override
     public ITreeIndexTupleWriterFactory getTupleWriterFactory() {
-       return tupleWriterFactory;
+        return tupleWriterFactory;
     }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeLeafFrameType.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeLeafFrameType.java
index 6ff44be..bd543f8 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeLeafFrameType.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeLeafFrameType.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package edu.uci.ics.hyracks.storage.am.btree.frames;
 
 public enum BTreeLeafFrameType {
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMInteriorFrame.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMInteriorFrame.java
index d2cb2c6..90b167f 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMInteriorFrame.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMInteriorFrame.java
@@ -19,9 +19,11 @@
 import java.util.ArrayList;
 import java.util.Collections;
 
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
 import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeInteriorFrame;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeOpContext.PageValidationInfo;
 import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
 import edu.uci.ics.hyracks.storage.am.common.api.ISplitKey;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
@@ -41,11 +43,14 @@
     private static final int childPtrSize = 4;
 
     private final ITreeIndexTupleReference cmpFrameTuple;
+    private final ITreeIndexTupleReference previousFt;
+
     private MultiComparator cmp;
 
     public BTreeNSMInteriorFrame(ITreeIndexTupleWriter tupleWriter) {
         super(tupleWriter, new OrderedSlotManager());
         cmpFrameTuple = tupleWriter.createTupleReference();
+        previousFt = tupleWriter.createTupleReference();
     }
 
     @Override
@@ -59,7 +64,7 @@
         return slotManager.findTupleIndex(tuple, frameTuple, cmp, FindTupleMode.INCLUSIVE,
                 FindTupleNoExactMatchPolicy.HIGHER_KEY);
     }
-    
+
     @Override
     public FrameOpSpaceStatus hasSpaceInsert(ITupleReference tuple) {
         // Tuple bytes + child pointer + slot.
@@ -89,12 +94,9 @@
             System.arraycopy(tuple.getFieldData(tuple.getFieldCount() - 1), getLeftChildPageOff(tuple) + childPtrSize,
                     buf.array(), rightLeafOff, childPtrSize);
         } else {
-            // If slotOff has a right (slot-)neighbor then update its child
-            // pointer.
-            // The only time when this is NOT the case, is when this is the
-            // very first tuple (or when the splitkey goes into the rightmost
-            // slot but that
-            // case is handled in the if above).
+            // If slotOff has a right (slot-)neighbor then update its child pointer.
+            // The only time when this is NOT the case, is when this is the very first tuple
+            // (or when the splitkey goes into the rightmost slot but that case is handled in the if above).
             if (buf.getInt(tupleCountOff) > 1) {
                 int rightNeighborOff = slotOff - slotManager.getSlotSize();
                 frameTuple.resetByTupleOffset(buf, slotManager.getTupleOff(rightNeighborOff));
@@ -103,7 +105,7 @@
             }
         }
     }
-    
+
     @Override
     public int findDeleteTupleIndex(ITupleReference tuple) throws TreeIndexException {
         return slotManager.findTupleIndex(tuple, frameTuple, cmp, FindTupleMode.INCLUSIVE,
@@ -135,7 +137,7 @@
         buf.putInt(totalFreeSpaceOff,
                 buf.getInt(totalFreeSpaceOff) + keySize + childPtrSize + slotManager.getSlotSize());
     }
-    
+
     @Override
     public void deleteGreatest() {
         int slotOff = slotManager.getSlotEndOff();
@@ -152,16 +154,11 @@
             buf.putInt(freeSpace, freeSpace - (keySize + childPtrSize));
         }
     }
-    
+
     @Override
     public FrameOpSpaceStatus hasSpaceUpdate(ITupleReference tuple, int oldTupleIndex) {
         throw new UnsupportedOperationException("Cannot update tuples in interior node.");
     }
-    
-    @Override
-    public int findUpdateTupleIndex(ITupleReference tuple) throws TreeIndexException {
-        throw new UnsupportedOperationException("Cannot update tuples in interior node.");
-    }
 
     @Override
     public void insertSorted(ITupleReference tuple) {
@@ -179,18 +176,31 @@
     }
 
     @Override
-    public void split(ITreeIndexFrame rightFrame, ITupleReference tuple, ISplitKey splitKey) throws TreeIndexException {
+    public void split(ITreeIndexFrame rightFrame, ITupleReference tuple, ISplitKey splitKey) {
         ByteBuffer right = rightFrame.getBuffer();
         int tupleCount = getTupleCount();
-        
+
         // Find split point, and determine into which frame the new tuple should be inserted into.
-        int tuplesToLeft = (tupleCount / 2) + (tupleCount % 2);
+        int tuplesToLeft;
         ITreeIndexFrame targetFrame = null;
-        frameTuple.resetByTupleIndex(this, tuplesToLeft - 1);
-        if (cmp.compare(tuple, frameTuple) <= 0) {
-            targetFrame = this;
-        } else {
+
+        int totalSize = 0;
+        int halfPageSize = buf.capacity() / 2 - getPageHeaderSize();
+        int i;
+        for (i = 0; i < tupleCount; ++i) {
+            frameTuple.resetByTupleIndex(this, i);
+            totalSize += tupleWriter.bytesRequired(frameTuple) + childPtrSize + slotManager.getSlotSize();
+            if (totalSize >= halfPageSize) {
+                break;
+            }
+        }
+
+        if (cmp.compare(tuple, frameTuple) > 0) {
+            tuplesToLeft = i;
             targetFrame = rightFrame;
+        } else {
+            tuplesToLeft = i + 1;
+            targetFrame = this;
         }
         int tuplesToRight = tupleCount - tuplesToLeft;
 
@@ -232,8 +242,13 @@
         compact();
 
         // Insert the saved split key.
-        int targetTupleIndex = ((BTreeNSMInteriorFrame) targetFrame)
-                .findInsertTupleIndex(savedSplitKey.getTuple());
+        int targetTupleIndex;
+        // it's safe to catch this exception since it will have been caught before reaching here
+        try {
+            targetTupleIndex = ((BTreeNSMInteriorFrame) targetFrame).findInsertTupleIndex(savedSplitKey.getTuple());
+        } catch (TreeIndexException e) {
+            throw new IllegalStateException(e);
+        }
         targetFrame.insert(savedSplitKey.getTuple(), targetTupleIndex);
     }
 
@@ -270,17 +285,17 @@
     }
 
     @Override
-    public int getChildPageId(RangePredicate pred) {
+    public int getChildPageId(RangePredicate pred) throws HyracksDataException {
         // Trivial case where there is only a child pointer (and no key).
         if (buf.getInt(tupleCountOff) == 0) {
             return buf.getInt(rightLeafOff);
         }
-        // Trivial cases where no low key or high key was given (e.g.
-        // during an index scan).
+        // Trivial cases where no low key or high key was given (e.g. during an
+        // index scan).
         ITupleReference tuple = null;
         FindTupleMode fsm = null;
         // The target comparator may be on a prefix of the BTree key fields.
-        MultiComparator targetCmp = pred.getLowKeyComparator();;
+        MultiComparator targetCmp = pred.getLowKeyComparator();
         tuple = pred.getLowKey();
         if (tuple == null) {
             return getLeftmostChildPageId();
@@ -322,6 +337,7 @@
         slotOff -= slotManager.getSlotSize();
         frameTuple.resetByTupleOffset(buf, slotManager.getTupleOff(slotOff));
         int childPageOff = getLeftChildPageOff(frameTuple);
+
         return buf.getInt(childPageOff);
     }
 
@@ -351,7 +367,7 @@
 
     @Override
     public int getPageHeaderSize() {
-        return rightLeafOff;
+        return rightLeafOff + 4;
     }
 
     private int getLeftChildPageOff(ITupleReference tuple) {
@@ -377,15 +393,16 @@
         this.cmp = cmp;
         cmpFrameTuple.setFieldCount(cmp.getKeyFieldCount());
         frameTuple.setFieldCount(cmp.getKeyFieldCount());
+        previousFt.setFieldCount(cmp.getKeyFieldCount());
     }
-    
+
     @Override
     public ITreeIndexTupleReference createTupleReference() {
         ITreeIndexTupleReference tuple = tupleWriter.createTupleReference();
         tuple.setFieldCount(cmp.getKeyFieldCount());
         return tuple;
     }
-    
+
     // For debugging.
     public ArrayList<Integer> getChildren(MultiComparator cmp) {
         ArrayList<Integer> ret = new ArrayList<Integer>();
@@ -407,4 +424,23 @@
         }
         return ret;
     }
+
+    public void validate(PageValidationInfo pvi) throws HyracksDataException {
+        int tupleCount = getTupleCount();
+        for (int i = 0; i < tupleCount; i++) {
+            frameTuple.resetByTupleIndex(this, i);
+            if (!pvi.isLowRangeNull) {
+                assert cmp.compare(pvi.lowRangeTuple, frameTuple) < 0;
+            }
+
+            if (!pvi.isHighRangeNull) {
+                assert cmp.compare(pvi.highRangeTuple, frameTuple) >= 0;
+            }
+
+            if (i > 0) {
+                previousFt.resetByTupleIndex(this, i - 1);
+                assert cmp.compare(previousFt, frameTuple) < 0;
+            }
+        }
+    }
 }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMInteriorFrameFactory.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMInteriorFrameFactory.java
index 8618df8..1491b55 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMInteriorFrameFactory.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMInteriorFrameFactory.java
@@ -22,6 +22,7 @@
 public class BTreeNSMInteriorFrameFactory implements ITreeIndexFrameFactory {
 
     private static final long serialVersionUID = 1L;
+
     private final ITreeIndexTupleWriterFactory tupleWriterFactory;
 
     public BTreeNSMInteriorFrameFactory(ITreeIndexTupleWriterFactory tupleWriterFactory) {
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMLeafFrame.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMLeafFrame.java
index 4b7f44b..04b3077 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMLeafFrame.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMLeafFrame.java
@@ -17,10 +17,12 @@
 
 import java.nio.ByteBuffer;
 
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
 import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeDuplicateKeyException;
 import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeNonExistentKeyException;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeOpContext.PageValidationInfo;
 import edu.uci.ics.hyracks.storage.am.common.api.ISplitKey;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
@@ -33,10 +35,14 @@
 
 public class BTreeNSMLeafFrame extends TreeIndexNSMFrame implements IBTreeLeafFrame {
     protected static final int nextLeafOff = smFlagOff + 1;
+
     private MultiComparator cmp;
-    
+
+    private final ITreeIndexTupleReference previousFt;
+
     public BTreeNSMLeafFrame(ITreeIndexTupleWriter tupleWriter) {
         super(tupleWriter, new OrderedSlotManager());
+        previousFt = tupleWriter.createTupleReference();
     }
 
     @Override
@@ -65,7 +71,7 @@
         }
         return tupleIndex;
     }
-    
+
     @Override
     public int findUpdateTupleIndex(ITupleReference tuple) throws TreeIndexException {
         int tupleIndex = slotManager.findTupleIndex(tuple, frameTuple, cmp, FindTupleMode.EXACT,
@@ -73,34 +79,37 @@
         // Error indicator is set if there is no exact match.
         if (tupleIndex == slotManager.getErrorIndicator() || tupleIndex == slotManager.getGreatestKeyIndicator()) {
             throw new BTreeNonExistentKeyException("Trying to update a tuple with a nonexistent key in leaf node.");
-        }        
+        }
         return tupleIndex;
     }
-    
+
     @Override
     public int findUpsertTupleIndex(ITupleReference tuple) throws TreeIndexException {
         int tupleIndex = slotManager.findTupleIndex(tuple, frameTuple, cmp, FindTupleMode.INCLUSIVE,
                 FindTupleNoExactMatchPolicy.HIGHER_KEY);
-        // Just return the found tupleIndex. The caller will make the final decision whether to insert or update.
+        // Just return the found tupleIndex. The caller will make the final
+        // decision whether to insert or update.
         return tupleIndex;
     }
-    
+
     @Override
-    public ITupleReference getUpsertBeforeTuple(ITupleReference tuple, int targetTupleIndex) throws TreeIndexException {
+    public ITupleReference getMatchingKeyTuple(ITupleReference searchTuple, int targetTupleIndex) {
         // Examine the tuple index to determine whether it is valid or not.
         if (targetTupleIndex != slotManager.getGreatestKeyIndicator()) {
-            // We need to check the key to determine whether it's an insert or an update.
+            // We need to check the key to determine whether it's an insert or
+            // an update/delete
             frameTuple.resetByTupleIndex(this, targetTupleIndex);
-            if (cmp.compare(tuple, frameTuple) == 0) {
-                // The keys match, it's an update.
+            if (cmp.compare(searchTuple, frameTuple) == 0) {
+                // The keys match, it's an update/delete
                 return frameTuple;
             }
         }
-        // Either the tuple index is a special indicator, or the keys don't match.
+        // Either the tuple index is a special indicator, or the keys don't
+        // match.
         // In those cases, we are definitely dealing with an insert.
         return null;
     }
-    
+
     @Override
     public int findDeleteTupleIndex(ITupleReference tuple) throws TreeIndexException {
         int tupleIndex = slotManager.findTupleIndex(tuple, frameTuple, cmp, FindTupleMode.EXACT,
@@ -108,7 +117,7 @@
         // Error indicator is set if there is no exact match.
         if (tupleIndex == slotManager.getErrorIndicator() || tupleIndex == slotManager.getGreatestKeyIndicator()) {
             throw new BTreeNonExistentKeyException("Trying to delete a tuple with a nonexistent key in leaf node.");
-        }        
+        }
         return tupleIndex;
     }
 
@@ -128,21 +137,30 @@
     }
 
     @Override
-    public void split(ITreeIndexFrame rightFrame, ITupleReference tuple, ISplitKey splitKey) throws TreeIndexException {
-    	ByteBuffer right = rightFrame.getBuffer();
-        int tupleCount = getTupleCount();        
-        
-        // Find split point, and determine into which frame the new tuple should be inserted into.
+    public void split(ITreeIndexFrame rightFrame, ITupleReference tuple, ISplitKey splitKey) {
+        ByteBuffer right = rightFrame.getBuffer();
+        int tupleCount = getTupleCount();
+
+        // Find split point, and determine into which frame the new tuple should
+        // be inserted into.
         int tuplesToLeft;
-        int mid = tupleCount / 2;
         ITreeIndexFrame targetFrame = null;
-        int tupleOff = slotManager.getTupleOff(slotManager.getSlotEndOff() + slotManager.getSlotSize() * mid);
-        frameTuple.resetByTupleOffset(buf, tupleOff);
+        int totalSize = 0;
+        int halfPageSize = buf.capacity() / 2 - getPageHeaderSize();
+        int i;
+        for (i = 0; i < tupleCount; ++i) {
+            frameTuple.resetByTupleIndex(this, i);
+            totalSize += tupleWriter.getCopySpaceRequired(frameTuple) + slotManager.getSlotSize();
+            if (totalSize >= halfPageSize) {
+                break;
+            }
+        }
+
         if (cmp.compare(tuple, frameTuple) >= 0) {
-            tuplesToLeft = mid + (tupleCount % 2);
+            tuplesToLeft = i + 1;
             targetFrame = rightFrame;
         } else {
-            tuplesToLeft = mid;
+            tuplesToLeft = i;
             targetFrame = this;
         }
         int tuplesToRight = tupleCount - tuplesToLeft;
@@ -166,11 +184,18 @@
         compact();
 
         // Insert the new tuple.
-        int targetTupleIndex = ((BTreeNSMLeafFrame)targetFrame).findInsertTupleIndex(tuple);
+        int targetTupleIndex;
+        // it's safe to catch this exception since it will have been caught
+        // before reaching here
+        try {
+            targetTupleIndex = ((BTreeNSMLeafFrame) targetFrame).findInsertTupleIndex(tuple);
+        } catch (TreeIndexException e) {
+            throw new IllegalStateException(e);
+        }
         targetFrame.insert(tuple, targetTupleIndex);
 
         // Set the split key to be highest key in the left page.
-        tupleOff = slotManager.getTupleOff(slotManager.getSlotEndOff());
+        int tupleOff = slotManager.getTupleOff(slotManager.getSlotEndOff());
         frameTuple.resetByTupleOffset(buf, tupleOff);
         int splitKeySize = tupleWriter.bytesRequired(frameTuple, 0, cmp.getKeyFieldCount());
         splitKey.initData(splitKeySize);
@@ -197,7 +222,7 @@
 
     @Override
     public int getPageHeaderSize() {
-        return nextLeafOff;
+        return nextLeafOff + 4;
     }
 
     @Override
@@ -213,9 +238,28 @@
             buf.put(smFlagOff, (byte) 0);
         }
     }
-    
-	@Override
-	public void setMultiComparator(MultiComparator cmp) {
-		this.cmp = cmp;
-	}
-}
+
+    @Override
+    public void setMultiComparator(MultiComparator cmp) {
+        this.cmp = cmp;
+    }
+
+    public void validate(PageValidationInfo pvi) throws HyracksDataException {
+        int tupleCount = getTupleCount();
+        for (int i = 0; i < tupleCount; i++) {
+            frameTuple.resetByTupleIndex(this, i);
+            if (!pvi.isLowRangeNull) {
+                assert cmp.compare(pvi.lowRangeTuple, frameTuple) < 0;
+            }
+
+            if (!pvi.isHighRangeNull) {
+                assert cmp.compare(pvi.highRangeTuple, frameTuple) >= 0;
+            }
+
+            if (i > 0) {
+                previousFt.resetByTupleIndex(this, i - 1);
+                assert cmp.compare(previousFt, frameTuple) < 0;
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMLeafFrameFactory.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMLeafFrameFactory.java
index 9508df5..b445fa8 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMLeafFrameFactory.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/BTreeNSMLeafFrameFactory.java
@@ -22,8 +22,9 @@
 public class BTreeNSMLeafFrameFactory implements ITreeIndexFrameFactory {
 
     private static final long serialVersionUID = 1L;
+
     private final ITreeIndexTupleWriterFactory tupleWriterFactory;
-    
+
     public BTreeNSMLeafFrameFactory(ITreeIndexTupleWriterFactory tupleWriterFactory) {
         this.tupleWriterFactory = tupleWriterFactory;
     }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/OrderedSlotManager.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/OrderedSlotManager.java
index 5f507f5..e51ee99 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/OrderedSlotManager.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/frames/OrderedSlotManager.java
@@ -23,8 +23,8 @@
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 
 public class OrderedSlotManager extends AbstractSlotManager {
-    
-	@Override
+
+    @Override
     public int findTupleIndex(ITupleReference searchKey, ITreeIndexTupleReference frameTuple, MultiComparator multiCmp,
             FindTupleMode mode, FindTupleNoExactMatchPolicy matchPolicy) {
         if (frame.getTupleCount() <= 0) {
@@ -34,12 +34,12 @@
         int mid;
         int begin = 0;
         int end = frame.getTupleCount() - 1;
-        
+
         while (begin <= end) {
             mid = (begin + end) / 2;
-            frameTuple.resetByTupleIndex(frame, mid);            
-            
-            int cmp = multiCmp.compare(searchKey, frameTuple);            
+            frameTuple.resetByTupleIndex(frame, mid);
+
+            int cmp = multiCmp.compare(searchKey, frameTuple);
             if (cmp < 0) {
                 end = mid - 1;
             } else if (cmp > 0) {
@@ -87,7 +87,7 @@
             }
         }
     }
-    
+
     @Override
     public int insertSlot(int tupleIndex, int tupleOff) {
         int slotOff = getSlotOff(tupleIndex);
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTree.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTree.java
index 89e8870..86bc32a 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTree.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTree.java
@@ -16,102 +16,76 @@
 package edu.uci.ics.hyracks.storage.am.btree.impls;
 
 import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.locks.ReadWriteLock;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
 import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeFrame;
 import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeInteriorFrame;
 import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.btree.api.ITupleAcceptor;
 import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeException;
 import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeNonExistentKeyException;
 import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeNotUpdateableException;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMInteriorFrame;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeOpContext.PageValidationInfo;
 import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoadContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ISplitKey;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrame;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleWriter;
-import edu.uci.ics.hyracks.storage.am.common.api.IndexType;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.api.UnsortedInputException;
 import edu.uci.ics.hyracks.storage.am.common.frames.FrameOpSpaceStatus;
-import edu.uci.ics.hyracks.storage.am.common.impls.TreeDiskOrderScanCursor;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOp;
+import edu.uci.ics.hyracks.storage.am.common.impls.AbstractTreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.impls.NodeFrontier;
+import edu.uci.ics.hyracks.storage.am.common.impls.TreeIndexDiskOrderScanCursor;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
-import edu.uci.ics.hyracks.storage.am.common.util.TreeIndexUtils;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
 import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
-public class BTree implements ITreeIndex {
+public class BTree extends AbstractTreeIndex {
 
     public static final float DEFAULT_FILL_FACTOR = 0.7f;
 
     private final static long RESTART_OP = Long.MIN_VALUE;
+    private final static long FULL_RESTART_OP = Long.MIN_VALUE + 1;
     private final static int MAX_RESTARTS = 10;
-    private final static int rootPage = 1;
-        
-    private final IFreePageManager freePageManager;
-    private final IBufferCache bufferCache;    
-    private final IOperationCallback opCallback;
-    private final ITreeIndexFrameFactory interiorFrameFactory;
-    private final ITreeIndexFrameFactory leafFrameFactory;
-    private final int fieldCount;
-    private final IBinaryComparatorFactory[] cmpFactories;
+
+    private final AtomicInteger smoCounter;
     private final ReadWriteLock treeLatch;
-    private int fileId;
 
-    public BTree(IBufferCache bufferCache, IOperationCallback opCallback, int fieldCount, IBinaryComparatorFactory[] cmpFactories, IFreePageManager freePageManager,
-            ITreeIndexFrameFactory interiorFrameFactory, ITreeIndexFrameFactory leafFrameFactory) {
-        this.bufferCache = bufferCache;
-        this.opCallback = opCallback;
-        this.fieldCount = fieldCount;
-        this.cmpFactories = cmpFactories;
-        this.interiorFrameFactory = interiorFrameFactory;
-        this.leafFrameFactory = leafFrameFactory;        
-        this.freePageManager = freePageManager;
+    public BTree(IBufferCache bufferCache, IFileMapProvider fileMapProvider, IFreePageManager freePageManager,
+            ITreeIndexFrameFactory interiorFrameFactory, ITreeIndexFrameFactory leafFrameFactory,
+            IBinaryComparatorFactory[] cmpFactories, int fieldCount, FileReference file) {
+        super(bufferCache, fileMapProvider, freePageManager, interiorFrameFactory, leafFrameFactory, cmpFactories,
+                fieldCount, file);
         this.treeLatch = new ReentrantReadWriteLock(true);
-    }
-
-    @Override
-    public void create(int fileId) throws HyracksDataException {
-        treeLatch.writeLock().lock();
-        try {
-            ITreeIndexFrame leafFrame = leafFrameFactory.createFrame();
-            ITreeIndexMetaDataFrame metaFrame = freePageManager.getMetaDataFrameFactory().createFrame();
-            this.fileId = fileId;
-            freePageManager.open(fileId);
-            freePageManager.init(metaFrame, rootPage);
-            initRoot(leafFrame, true);
-        } finally {
-            treeLatch.writeLock().unlock();
-        }
-    }
-
-    @Override
-    public void open(int fileId) {    	
-    	this.fileId = fileId;
-    	freePageManager.open(fileId);
-    }
-
-    @Override
-    public void close() {
-        fileId = -1;
-        freePageManager.close();
+        this.smoCounter = new AtomicInteger();
     }
 
     private void diskOrderScan(ITreeIndexCursor icursor, BTreeOpContext ctx) throws HyracksDataException {
-        TreeDiskOrderScanCursor cursor = (TreeDiskOrderScanCursor) icursor;
+        TreeIndexDiskOrderScanCursor cursor = (TreeIndexDiskOrderScanCursor) icursor;
         ctx.reset();
         RangePredicate diskOrderScanPred = new RangePredicate(null, null, true, true, ctx.cmp, ctx.cmp);
         int currentPageId = rootPage;
@@ -124,6 +98,8 @@
             cursor.setCurrentPageId(currentPageId);
             cursor.setMaxPageId(maxPageId);
             ctx.cursorInitialState.setPage(page);
+            ctx.cursorInitialState.setSearchOperationCallback(ctx.searchCallback);
+            ctx.cursorInitialState.setOriginialKeyComparator(ctx.cmp);
             cursor.open(ctx.cursorInitialState, diskOrderScanPred);
         } catch (Exception e) {
             page.releaseReadLatch();
@@ -132,6 +108,69 @@
         }
     }
 
+    public void validate() throws HyracksDataException {
+        // Stack validation protocol:
+        //      * parent pushes the validation information onto the stack before validation
+        //      * child pops the validation information off of the stack after validating
+        BTreeAccessor accessor = (BTreeAccessor) createAccessor(NoOpOperationCallback.INSTANCE,
+                NoOpOperationCallback.INSTANCE);
+        PageValidationInfo pvi = accessor.ctx.createPageValidationInfo(null);
+        accessor.ctx.validationInfos.addFirst(pvi);
+        validate(accessor.ctx, rootPage);
+    }
+
+    private void validate(BTreeOpContext ctx, int pageId) throws HyracksDataException {
+        ICachedPage page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, pageId), false);
+        ctx.interiorFrame.setPage(page);
+        PageValidationInfo currentPvi = ctx.validationInfos.peekFirst();
+
+        boolean isLeaf = ctx.interiorFrame.isLeaf();
+        if (isLeaf) {
+            ctx.leafFrame.setPage(page);
+            ctx.leafFrame.validate(currentPvi);
+        } else {
+            PageValidationInfo nextPvi = ctx.createPageValidationInfo(currentPvi);
+            List<Integer> children = ((BTreeNSMInteriorFrame) ctx.interiorFrame).getChildren(ctx.cmp);
+            ctx.interiorFrame.validate(currentPvi);
+            for (int i = 0; i < children.size(); i++) {
+                ctx.interiorFrame.setPage(page);
+
+                if (children.size() == 1) {
+                    // There is a single child pointer with no keys, so propagate both low and high ranges
+                    nextPvi.propagateLowRangeKey(currentPvi);
+                    nextPvi.propagateHighRangeKey(currentPvi);
+                } else if (i == 0) {
+                    // There is more than one child pointer and this is the left-most child pointer, so:
+                    //      1) propagate the low range key from the parent
+                    //      2) adjust the high range key
+                    nextPvi.propagateLowRangeKey(currentPvi);
+                    ctx.interiorFrameTuple.resetByTupleIndex(ctx.interiorFrame, i);
+                    nextPvi.adjustHighRangeKey(ctx.interiorFrameTuple);
+                } else if (i == children.size() - 1) {
+                    // There is more than one child pointer and this is the right-most child pointer, so:
+                    //      1) propagate the high range key from the parent
+                    //      2) adjust the low range key
+                    nextPvi.propagateHighRangeKey(currentPvi);
+                    ctx.interiorFrameTuple.resetByTupleIndex(ctx.interiorFrame, i - 1);
+                    nextPvi.adjustLowRangeKey(ctx.interiorFrameTuple);
+                } else {
+                    // There is more than one child pointer and this pointer is not the left/right-most pointer, so:
+                    //      1) adjust the low range key
+                    //      2) adjust the high range key
+                    ctx.interiorFrameTuple.resetByTupleIndex(ctx.interiorFrame, i - 1);
+                    nextPvi.adjustLowRangeKey(ctx.interiorFrameTuple);
+                    ctx.interiorFrameTuple.resetByTupleIndex(ctx.interiorFrame, i);
+                    nextPvi.adjustHighRangeKey(ctx.interiorFrameTuple);
+                }
+
+                ctx.validationInfos.addFirst(nextPvi);
+                validate(ctx, children.get(i));
+            }
+        }
+        bufferCache.unpin(page);
+        ctx.validationInfos.removeFirst();
+    }
+
     private void search(ITreeIndexCursor cursor, ISearchPredicate searchPred, BTreeOpContext ctx)
             throws TreeIndexException, HyracksDataException {
         ctx.reset();
@@ -176,24 +215,17 @@
             }
         }
         if (ctx.smPages.size() > 0) {
+            if (ctx.smoCount == Integer.MAX_VALUE) {
+                smoCounter.set(0);
+            } else {
+                smoCounter.incrementAndGet();
+            }
             treeLatch.writeLock().unlock();
             ctx.smPages.clear();
         }
         ctx.interiorFrame.setPage(originalPage);
     }
 
-    private void initRoot(ITreeIndexFrame leafFrame, boolean firstInit) throws HyracksDataException {
-        ICachedPage rootNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, rootPage), firstInit);
-        rootNode.acquireWriteLatch();
-        try {
-            leafFrame.setPage(rootNode);
-            leafFrame.initBuffer((byte) 0);
-        } finally {
-            rootNode.releaseWriteLatch();
-            bufferCache.unpin(rootNode);
-        }
-    }
-    
     private void createNewRoot(BTreeOpContext ctx) throws HyracksDataException, TreeIndexException {
         // Make sure the root is always in the same page.
         ICachedPage leftNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, ctx.splitKey.getLeftPage()),
@@ -209,9 +241,13 @@
                         .getBuffer().capacity());
                 ctx.interiorFrame.setPage(newLeftNode);
                 ctx.interiorFrame.setSmFlag(false);
+                // Remember LSN to set it in the root.
+                long leftNodeLSN = ctx.interiorFrame.getPageLsn();
                 // Initialize new root (leftNode becomes new root).
                 ctx.interiorFrame.setPage(leftNode);
                 ctx.interiorFrame.initBuffer((byte) (ctx.interiorFrame.getLevel() + 1));
+                // Copy over LSN.
+                ctx.interiorFrame.setPageLsn(leftNodeLSN);
                 // Will be cleared later in unsetSmPages.
                 ctx.interiorFrame.setSmFlag(true);
                 ctx.splitKey.setLeftPage(newLeftId);
@@ -226,8 +262,9 @@
             bufferCache.unpin(leftNode);
         }
     }
-    
-    private void insertUpdateOrDelete(ITupleReference tuple, BTreeOpContext ctx) throws HyracksDataException, TreeIndexException {
+
+    private void insertUpdateOrDelete(ITupleReference tuple, BTreeOpContext ctx) throws HyracksDataException,
+            TreeIndexException {
         ctx.reset();
         ctx.pred.setLowKeyComparator(ctx.cmp);
         ctx.pred.setHighKeyComparator(ctx.cmp);
@@ -239,11 +276,18 @@
         // due to ongoing structure modifications during the descent.
         boolean repeatOp = true;
         while (repeatOp && ctx.opRestarts < MAX_RESTARTS) {
+            ctx.smoCount = smoCounter.get();
             performOp(rootPage, null, true, ctx);
             // Do we need to restart from the (possibly new) root?
-            if (!ctx.pageLsns.isEmpty() && ctx.pageLsns.getLast() == RESTART_OP) {
-                ctx.pageLsns.removeLast(); // pop the restart op indicator
-                continue;
+            if (!ctx.pageLsns.isEmpty()) {
+                if (ctx.pageLsns.getLast() == FULL_RESTART_OP) {
+                    ctx.pageLsns.clear();
+                    continue;
+                } else if (ctx.pageLsns.getLast() == RESTART_OP) {
+                    ctx.pageLsns.removeLast(); // pop the restart op indicator
+                    continue;
+                }
+
             }
             // Split key propagated?
             if (ctx.splitKey.getBuffer() != null) {
@@ -253,13 +297,19 @@
             unsetSmPages(ctx);
             repeatOp = false;
         }
+
+        if (ctx.opRestarts >= MAX_RESTARTS) {
+            throw new BTreeException("Operation exceeded the maximum number of restarts");
+        }
     }
-    
+
     private void insert(ITupleReference tuple, BTreeOpContext ctx) throws HyracksDataException, TreeIndexException {
+        ctx.modificationCallback.before(tuple);
         insertUpdateOrDelete(tuple, ctx);
     }
-    
+
     private void upsert(ITupleReference tuple, BTreeOpContext ctx) throws HyracksDataException, TreeIndexException {
+        ctx.modificationCallback.before(tuple);
         insertUpdateOrDelete(tuple, ctx);
     }
 
@@ -270,18 +320,22 @@
         if (fieldCount == ctx.cmp.getKeyFieldCount()) {
             throw new BTreeNotUpdateableException("Cannot perform updates when the entire tuple forms the key.");
         }
+        ctx.modificationCallback.before(tuple);
         insertUpdateOrDelete(tuple, ctx);
     }
-    
+
     private void delete(ITupleReference tuple, BTreeOpContext ctx) throws HyracksDataException, TreeIndexException {
+        ctx.modificationCallback.before(tuple);
         insertUpdateOrDelete(tuple, ctx);
     }
-    
-    private boolean insertLeaf(ITupleReference tuple, int targetTupleIndex, int pageId, BTreeOpContext ctx) throws Exception {
+
+    private boolean insertLeaf(ITupleReference tuple, int targetTupleIndex, int pageId, BTreeOpContext ctx)
+            throws Exception {
         boolean restartOp = false;
         FrameOpSpaceStatus spaceStatus = ctx.leafFrame.hasSpaceInsert(tuple);
         switch (spaceStatus) {
             case SUFFICIENT_CONTIGUOUS_SPACE: {
+                ctx.modificationCallback.found(null, tuple);
                 ctx.leafFrame.insert(tuple, targetTupleIndex);
                 ctx.splitKey.reset();
                 break;
@@ -291,11 +345,12 @@
                 if (slotsChanged) {
                     targetTupleIndex = ctx.leafFrame.findInsertTupleIndex(tuple);
                 }
+                ctx.modificationCallback.found(null, tuple);
                 ctx.leafFrame.insert(tuple, targetTupleIndex);
                 ctx.splitKey.reset();
                 break;
             }
-            case INSUFFICIENT_SPACE: {            	
+            case INSUFFICIENT_SPACE: {
                 // Try compressing the page first and see if there is space available.
                 boolean reCompressed = ctx.leafFrame.compress();
                 if (reCompressed) {
@@ -304,18 +359,20 @@
                     spaceStatus = ctx.leafFrame.hasSpaceInsert(tuple);
                 }
                 if (spaceStatus == FrameOpSpaceStatus.SUFFICIENT_CONTIGUOUS_SPACE) {
+                    ctx.modificationCallback.found(null, tuple);
                     ctx.leafFrame.insert(tuple, targetTupleIndex);
                     ctx.splitKey.reset();
                 } else {
-                	restartOp = performLeafSplit(pageId, tuple, ctx);
+                    restartOp = performLeafSplit(pageId, tuple, ctx, -1);
                 }
                 break;
             }
-        }        
+        }
         return restartOp;
     }
-    
-    private boolean performLeafSplit(int pageId, ITupleReference tuple, BTreeOpContext ctx) throws Exception {    	
+
+    private boolean performLeafSplit(int pageId, ITupleReference tuple, BTreeOpContext ctx, int updateTupleIndex)
+            throws Exception {
         // We must never hold a latch on a page while waiting to obtain the tree
         // latch, because it this could lead to a latch-deadlock.
         // If we can't get the tree latch, we return, release our page latches,
@@ -323,16 +380,30 @@
         // Lock is released in unsetSmPages(), after sm has fully completed.
         if (!treeLatch.writeLock().tryLock()) {
             return true;
+        } else {
+            int tempSmoCount = smoCounter.get();
+            if (tempSmoCount != ctx.smoCount) {
+                treeLatch.writeLock().unlock();
+                return true;
+            }
         }
         int rightPageId = freePageManager.getFreePage(ctx.metaFrame);
-        ICachedPage rightNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, rightPageId),
-                true);
+        ICachedPage rightNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, rightPageId), true);
         rightNode.acquireWriteLatch();
         try {
             IBTreeLeafFrame rightFrame = ctx.createLeafFrame();
             rightFrame.setPage(rightNode);
             rightFrame.initBuffer((byte) 0);
             rightFrame.setMultiComparator(ctx.cmp);
+
+            // Perform an update (delete + insert) if the updateTupleIndex != -1
+            if (updateTupleIndex != -1) {
+                ITupleReference beforeTuple = ctx.leafFrame.getMatchingKeyTuple(tuple, updateTupleIndex);
+                ctx.modificationCallback.found(beforeTuple, tuple);
+                ctx.leafFrame.delete(tuple, updateTupleIndex);
+            } else {
+                ctx.modificationCallback.found(null, tuple);
+            }
             ctx.leafFrame.split(rightFrame, tuple, ctx.splitKey);
 
             ctx.smPages.add(pageId);
@@ -343,10 +414,6 @@
             rightFrame.setNextLeaf(ctx.leafFrame.getNextLeaf());
             ctx.leafFrame.setNextLeaf(rightPageId);
 
-            // TODO: we just use increasing numbers as pageLsn,
-            // we
-            // should tie this together with the LogManager and
-            // TransactionManager
             rightFrame.setPageLsn(rightFrame.getPageLsn() + 1);
             ctx.leafFrame.setPageLsn(ctx.leafFrame.getPageLsn() + 1);
 
@@ -360,63 +427,60 @@
         }
         return false;
     }
-    
-    private boolean updateLeaf(ITupleReference tuple, int oldTupleIndex, int pageId, BTreeOpContext ctx) throws Exception {
+
+    private boolean updateLeaf(ITupleReference tuple, int oldTupleIndex, int pageId, BTreeOpContext ctx)
+            throws Exception {
         FrameOpSpaceStatus spaceStatus = ctx.leafFrame.hasSpaceUpdate(tuple, oldTupleIndex);
+        ITupleReference beforeTuple = ctx.leafFrame.getMatchingKeyTuple(tuple, oldTupleIndex);
         boolean restartOp = false;
         switch (spaceStatus) {
             case SUFFICIENT_INPLACE_SPACE: {
+                ctx.modificationCallback.found(beforeTuple, tuple);
                 ctx.leafFrame.update(tuple, oldTupleIndex, true);
                 ctx.splitKey.reset();
                 break;
             }
             case SUFFICIENT_CONTIGUOUS_SPACE: {
+                ctx.modificationCallback.found(beforeTuple, tuple);
                 ctx.leafFrame.update(tuple, oldTupleIndex, false);
                 ctx.splitKey.reset();
                 break;
-            }                
+            }
             case SUFFICIENT_SPACE: {
                 // Delete the old tuple, compact the frame, and insert the new tuple.
+                ctx.modificationCallback.found(beforeTuple, tuple);
                 ctx.leafFrame.delete(tuple, oldTupleIndex);
                 ctx.leafFrame.compact();
                 int targetTupleIndex = ctx.leafFrame.findInsertTupleIndex(tuple);
                 ctx.leafFrame.insert(tuple, targetTupleIndex);
                 ctx.splitKey.reset();
                 break;
-            }                
+            }
             case INSUFFICIENT_SPACE: {
-                // Delete the old tuple, and try compressing the page to make space available.
-                ctx.leafFrame.delete(tuple, oldTupleIndex);
-                ctx.leafFrame.compress();
-                // We need to insert the new tuple, so check if there is space.
-                spaceStatus = ctx.leafFrame.hasSpaceInsert(tuple);                
-                if (spaceStatus == FrameOpSpaceStatus.SUFFICIENT_CONTIGUOUS_SPACE) {
-                    int targetTupleIndex = ctx.leafFrame.findInsertTupleIndex(tuple);
-                    ctx.leafFrame.insert(tuple, targetTupleIndex);
-                    ctx.splitKey.reset();
-                } else {
-                    restartOp = performLeafSplit(pageId, tuple, ctx);
-                }
+                restartOp = performLeafSplit(pageId, tuple, ctx, oldTupleIndex);
                 break;
             }
         }
         return restartOp;
     }
 
-    private boolean upsertLeaf(ITupleReference tuple, int targetTupleIndex, int pageId, BTreeOpContext ctx) throws Exception {
+    private boolean upsertLeaf(ITupleReference tuple, int targetTupleIndex, int pageId, BTreeOpContext ctx)
+            throws Exception {
         boolean restartOp = false;
-        ITupleReference beforeTuple = ctx.leafFrame.getUpsertBeforeTuple(tuple, targetTupleIndex);
-        if (beforeTuple == null) {
-            opCallback.pre(null);
-            restartOp = insertLeaf(tuple, targetTupleIndex, pageId, ctx);
+        ITupleReference beforeTuple = ctx.leafFrame.getMatchingKeyTuple(tuple, targetTupleIndex);
+        if (ctx.acceptor.accept(beforeTuple)) {
+            if (beforeTuple == null) {
+                restartOp = insertLeaf(tuple, targetTupleIndex, pageId, ctx);
+            } else {
+                restartOp = updateLeaf(tuple, targetTupleIndex, pageId, ctx);
+            }
         } else {
-            opCallback.pre(beforeTuple);
-            restartOp = updateLeaf(tuple, targetTupleIndex, pageId, ctx);
+            targetTupleIndex = ctx.leafFrame.findInsertTupleIndex(tuple);
+            restartOp = insertLeaf(tuple, targetTupleIndex, pageId, ctx);
         }
-        opCallback.post(tuple);
         return restartOp;
     }
-    
+
     private void insertInterior(ICachedPage node, int pageId, ITupleReference tuple, BTreeOpContext ctx)
             throws Exception {
         ctx.interiorFrame.setPage(node);
@@ -439,9 +503,6 @@
                     ctx.smPages.add(rightPageId);
                     ctx.interiorFrame.setSmFlag(true);
                     rightFrame.setSmFlag(true);
-                    // TODO: we just use increasing numbers as pageLsn, we
-                    // should tie this together with the LogManager and
-                    // TransactionManager
                     rightFrame.setPageLsn(rightFrame.getPageLsn() + 1);
                     ctx.interiorFrame.setPageLsn(ctx.interiorFrame.getPageLsn() + 1);
 
@@ -451,7 +512,7 @@
                     bufferCache.unpin(rightNode);
                 }
                 break;
-            }                
+            }
 
             case SUFFICIENT_CONTIGUOUS_SPACE: {
                 ctx.interiorFrame.insert(tuple, targetTupleIndex);
@@ -471,7 +532,8 @@
         }
     }
 
-    private boolean deleteLeaf(ICachedPage node, int pageId, ITupleReference tuple, BTreeOpContext ctx) throws Exception {
+    private boolean deleteLeaf(ICachedPage node, int pageId, ITupleReference tuple, BTreeOpContext ctx)
+            throws Exception {
         // Simply delete the tuple, and don't do any rebalancing.
         // This means that there could be underflow, even an empty page that is
         // pointed to by an interior node.
@@ -479,12 +541,14 @@
             throw new BTreeNonExistentKeyException("Trying to delete a tuple with a nonexistent key in leaf node.");
         }
         int tupleIndex = ctx.leafFrame.findDeleteTupleIndex(tuple);
+        ITupleReference beforeTuple = ctx.leafFrame.getMatchingKeyTuple(tuple, tupleIndex);
+        ctx.modificationCallback.found(beforeTuple, tuple);
         ctx.leafFrame.delete(tuple, tupleIndex);
         return false;
     }
 
     private final boolean acquireLatch(ICachedPage node, BTreeOpContext ctx, boolean isLeaf) {
-        if (!isLeaf || (ctx.op == IndexOp.SEARCH && !ctx.cursor.exclusiveLatchNodes())) {
+        if (!isLeaf || (ctx.op == IndexOperation.SEARCH && !ctx.cursor.exclusiveLatchNodes())) {
             node.acquireReadLatch();
             return true;
         } else {
@@ -493,24 +557,23 @@
         }
     }
 
-    private boolean isConsistent(int pageId, BTreeOpContext ctx) throws Exception {
+    private ICachedPage isConsistent(int pageId, BTreeOpContext ctx) throws Exception {
         ICachedPage node = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, pageId), false);
         node.acquireReadLatch();
         ctx.interiorFrame.setPage(node);
-        boolean isConsistent = false;
-        try {
-            isConsistent = ctx.pageLsns.getLast() == ctx.interiorFrame.getPageLsn();
-        } finally {
+        boolean isConsistent = ctx.pageLsns.getLast() == ctx.interiorFrame.getPageLsn();
+        if (!isConsistent) {
             node.releaseReadLatch();
             bufferCache.unpin(node);
+            return null;
         }
-        return isConsistent;
+        return node;
     }
 
-    private void performOp(int pageId, ICachedPage parent, boolean parentIsReadLatched, BTreeOpContext ctx) throws HyracksDataException, TreeIndexException {
+    private void performOp(int pageId, ICachedPage parent, boolean parentIsReadLatched, BTreeOpContext ctx)
+            throws HyracksDataException, TreeIndexException {
         ICachedPage node = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, pageId), false);
         ctx.interiorFrame.setPage(node);
-        
         // this check performs an unprotected read in the page
         // the following could happen: TODO fill out
         boolean unsafeIsLeaf = ctx.interiorFrame.isLeaf();
@@ -526,9 +589,9 @@
             // Latch coupling: unlatch parent.
             if (parent != null) {
                 if (parentIsReadLatched) {
-                	parent.releaseReadLatch();
+                    parent.releaseReadLatch();
                 } else {
-                	parent.releaseWriteLatch();
+                    parent.releaseWriteLatch();
                 }
                 bufferCache.unpin(parent);
             }
@@ -542,39 +605,41 @@
                         int childPageId = ctx.interiorFrame.getChildPageId(ctx.pred);
                         performOp(childPageId, node, isReadLatched, ctx);
 
-                        if (!ctx.pageLsns.isEmpty() && ctx.pageLsns.getLast() == RESTART_OP) {
-                            // Pop the restart op indicator.
-                            ctx.pageLsns.removeLast();                            
-                            if (isConsistent(pageId, ctx)) {
-                                // Pin and latch page again, since it was unpinned and unlatched in call to performOp (passed as parent).
-                                node = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, pageId), false);
-                                node.acquireReadLatch();
-                                ctx.interiorFrame.setPage(node);
-                                isReadLatched = true;
-                                // Descend the tree again.                                
-                                continue;
-                            } else {
-                                // Pop pageLsn of this page (version seen by this op during descent).
-                                ctx.pageLsns.removeLast(); 
-                                // This node is not consistent set the restart indicator for upper level.
-                                ctx.pageLsns.add(RESTART_OP);
+                        if (!ctx.pageLsns.isEmpty()) {
+                            if (ctx.pageLsns.getLast() == FULL_RESTART_OP) {
                                 break;
+                            } else if (ctx.pageLsns.getLast() == RESTART_OP) {
+                                // Pop the restart op indicator.
+                                ctx.pageLsns.removeLast();
+                                node = isConsistent(pageId, ctx);
+                                if (node != null) {
+                                    isReadLatched = true;
+                                    // Descend the tree again.                                
+                                    continue;
+                                } else {
+                                    // Pop pageLsn of this page (version seen by this op during descent).
+                                    ctx.pageLsns.removeLast();
+                                    // This node is not consistent set the restart indicator for upper level.
+                                    ctx.pageLsns.add(RESTART_OP);
+                                    break;
+                                }
                             }
                         }
-                        
+
                         switch (ctx.op) {
                             case INSERT:
                             case UPSERT:
                             case UPDATE: {
                                 // Is there a propagated split key?
                                 if (ctx.splitKey.getBuffer() != null) {
-                                    ICachedPage interiorNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, pageId), false);
+                                    ICachedPage interiorNode = bufferCache.pin(
+                                            BufferedFileHandle.getDiskPageId(fileId, pageId), false);
                                     interiorNode.acquireWriteLatch();
                                     try {
-                                        // Insert or update op. Both can cause split keys to propagate upwards.                                            
+                                        // Insert or update op. Both can cause split keys to propagate upwards. 
                                         insertInterior(interiorNode, pageId, ctx.splitKey.getTuple(), ctx);
                                     } finally {
-                                    	interiorNode.releaseWriteLatch();
+                                        interiorNode.releaseWriteLatch();
                                         bufferCache.unpin(interiorNode);
                                     }
                                 } else {
@@ -582,14 +647,15 @@
                                 }
                                 break;
                             }
-                            
+
                             case DELETE: {
                                 if (ctx.splitKey.getBuffer() != null) {
-                                    throw new BTreeException("Split key was propagated during delete. Delete allows empty leaf pages.");
+                                    throw new BTreeException(
+                                            "Split key was propagated during delete. Delete allows empty leaf pages.");
                                 }
                                 break;
                             }
-                                
+
                             default: {
                                 // Do nothing for Search and DiskOrderScan.
                                 break;
@@ -601,9 +667,9 @@
                 } else { // smFlag
                     ctx.opRestarts++;
                     if (isReadLatched) {
-                    	node.releaseReadLatch();
+                        node.releaseReadLatch();
                     } else {
-                    	node.releaseWriteLatch();
+                        node.releaseWriteLatch();
                     }
                     bufferCache.unpin(node);
 
@@ -612,9 +678,9 @@
                     // instead we just immediately release the lock. this is
                     // inefficient but still correct and will not cause
                     // latch-deadlock
-                    treeLatch.writeLock().lock();
-                    treeLatch.writeLock().unlock();
-                    
+                    treeLatch.readLock().lock();
+                    treeLatch.readLock().unlock();
+
                     // unwind recursion and restart operation, find lowest page
                     // with a pageLsn as seen by this operation during descent
                     ctx.pageLsns.removeLast(); // pop current page lsn
@@ -624,10 +690,10 @@
                 }
             } else { // isLeaf and !smFlag
                 // We may have to restart an op to avoid latch deadlock.
-            	boolean restartOp = false;
-            	ctx.leafFrame.setPage(node);
-            	switch (ctx.op) {
-                    case INSERT: {                        
+                boolean restartOp = false;
+                ctx.leafFrame.setPage(node);
+                switch (ctx.op) {
+                    case INSERT: {
                         int targetTupleIndex = ctx.leafFrame.findInsertTupleIndex(ctx.pred.getLowKey());
                         restartOp = insertLeaf(ctx.pred.getLowKey(), targetTupleIndex, pageId, ctx);
                         break;
@@ -639,323 +705,72 @@
                     }
                     case UPDATE: {
                         int oldTupleIndex = ctx.leafFrame.findUpdateTupleIndex(ctx.pred.getLowKey());
-                    	restartOp = updateLeaf(ctx.pred.getLowKey(), oldTupleIndex, pageId, ctx);
+                        restartOp = updateLeaf(ctx.pred.getLowKey(), oldTupleIndex, pageId, ctx);
                         break;
                     }
                     case DELETE: {
-                    	restartOp = deleteLeaf(node, pageId, ctx.pred.getLowKey(), ctx);
+                        restartOp = deleteLeaf(node, pageId, ctx.pred.getLowKey(), ctx);
                         break;
                     }
                     case SEARCH: {
+                        ctx.cursorInitialState.setSearchOperationCallback(ctx.searchCallback);
+                        ctx.cursorInitialState.setOriginialKeyComparator(ctx.cmp);
                         ctx.cursorInitialState.setPage(node);
+                        ctx.cursorInitialState.setPageId(pageId);
                         ctx.cursor.open(ctx.cursorInitialState, ctx.pred);
                         break;
                     }
                 }
-            	if (ctx.op != IndexOp.SEARCH) {
-            	    node.releaseWriteLatch();
+                if (ctx.op != IndexOperation.SEARCH) {
+                    node.releaseWriteLatch();
                     bufferCache.unpin(node);
-            	}
-            	if (restartOp) {
-            		ctx.pageLsns.removeLast();
-                    ctx.pageLsns.add(RESTART_OP);
-            	}
+                }
+                if (restartOp) {
+                    // Wait for the SMO to finish before restarting.
+                    treeLatch.readLock().lock();
+                    treeLatch.readLock().unlock();
+                    ctx.pageLsns.removeLast();
+                    ctx.pageLsns.add(FULL_RESTART_OP);
+                }
             }
         } catch (TreeIndexException e) {
-        	if (!ctx.exceptionHandled) {
-        		if (node != null) {
-        			if (isReadLatched) {
-        				node.releaseReadLatch();
-        			} else {
-        				node.releaseWriteLatch();
-        			}
-        			bufferCache.unpin(node);
-        			ctx.exceptionHandled = true;
-        		}
+            if (!ctx.exceptionHandled) {
+                if (node != null) {
+                    if (isReadLatched) {
+                        node.releaseReadLatch();
+                    } else {
+                        node.releaseWriteLatch();
+                    }
+                    bufferCache.unpin(node);
+                    ctx.exceptionHandled = true;
+                }
             }
             throw e;
         } catch (Exception e) {
-        	e.printStackTrace();
-        	if (node != null) {
-        		if (isReadLatched) {
-    				node.releaseReadLatch();
-    			} else {
-    				node.releaseWriteLatch();
-    			}
-        		bufferCache.unpin(node);
-        	}
+            e.printStackTrace();
+            if (node != null) {
+                if (isReadLatched) {
+                    node.releaseReadLatch();
+                } else {
+                    node.releaseWriteLatch();
+                }
+                bufferCache.unpin(node);
+            }
             BTreeException wrappedException = new BTreeException(e);
             ctx.exceptionHandled = true;
             throw wrappedException;
         }
     }
 
-    public class BulkLoadContext implements IIndexBulkLoadContext {
-        public final MultiComparator cmp;
-        public final int slotSize;
-        public final int leafMaxBytes;
-        public final int interiorMaxBytes;
-        public final BTreeSplitKey splitKey;
-        // we maintain a frontier of nodes for each level
-        private final ArrayList<NodeFrontier> nodeFrontiers = new ArrayList<NodeFrontier>();
-        private final IBTreeLeafFrame leafFrame;
-        private final IBTreeInteriorFrame interiorFrame;
-        private final ITreeIndexMetaDataFrame metaFrame;
-        private final ITreeIndexTupleWriter tupleWriter;        
-        
-        public BulkLoadContext(float fillFactor, IBTreeLeafFrame leafFrame, IBTreeInteriorFrame interiorFrame,
-                ITreeIndexMetaDataFrame metaFrame, IBinaryComparatorFactory[] cmpFactories) throws HyracksDataException {
-            this.cmp = MultiComparator.create(cmpFactories);
-            
-        	leafFrame.setMultiComparator(cmp);
-        	interiorFrame.setMultiComparator(cmp);
-        	
-            splitKey = new BTreeSplitKey(leafFrame.getTupleWriter().createTupleReference());
-            tupleWriter = leafFrame.getTupleWriter();
-
-            NodeFrontier leafFrontier = new NodeFrontier(leafFrame.createTupleReference());
-            leafFrontier.pageId = freePageManager.getFreePage(metaFrame);
-            leafFrontier.page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, leafFrontier.pageId),
-                    true);
-            leafFrontier.page.acquireWriteLatch();
-
-            interiorFrame.setPage(leafFrontier.page);
-            interiorFrame.initBuffer((byte) 0);
-            interiorMaxBytes = (int) ((float) interiorFrame.getBuffer().capacity() * fillFactor);
-
-            leafFrame.setPage(leafFrontier.page);
-            leafFrame.initBuffer((byte) 0);
-            leafMaxBytes = (int) ((float) leafFrame.getBuffer().capacity() * fillFactor);
-
-            slotSize = leafFrame.getSlotSize();
-
-            this.leafFrame = leafFrame;
-            this.interiorFrame = interiorFrame;
-            this.metaFrame = metaFrame;
-
-            nodeFrontiers.add(leafFrontier);
-        }
-
-        private void addLevel() throws HyracksDataException {
-            NodeFrontier frontier = new NodeFrontier(tupleWriter.createTupleReference());
-            frontier.pageId = freePageManager.getFreePage(metaFrame);
-            frontier.page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, frontier.pageId), true);
-            frontier.page.acquireWriteLatch();
-            frontier.lastTuple.setFieldCount(cmp.getKeyFieldCount());
-            interiorFrame.setPage(frontier.page);
-            interiorFrame.initBuffer((byte) nodeFrontiers.size());
-            nodeFrontiers.add(frontier);
-        }
+    private BTreeOpContext createOpContext(IIndexAccessor accessor,
+            IModificationOperationCallback modificationCallback, ISearchOperationCallback searchCallback) {
+        return new BTreeOpContext(accessor, leafFrameFactory, interiorFrameFactory, freePageManager
+                .getMetaDataFrameFactory().createFrame(), cmpFactories, modificationCallback, searchCallback);
     }
 
-    private void propagateBulk(BulkLoadContext ctx, int level) throws HyracksDataException {
-
-        if (ctx.splitKey.getBuffer() == null)
-            return;
-
-        if (level >= ctx.nodeFrontiers.size())
-            ctx.addLevel();
-
-        NodeFrontier frontier = ctx.nodeFrontiers.get(level);
-        ctx.interiorFrame.setPage(frontier.page);
-
-        ITupleReference tuple = ctx.splitKey.getTuple();
-        int spaceNeeded = ctx.tupleWriter.bytesRequired(tuple, 0, ctx.cmp.getKeyFieldCount()) + ctx.slotSize + 4;
-        int spaceUsed = ctx.interiorFrame.getBuffer().capacity() - ctx.interiorFrame.getTotalFreeSpace();
-        if (spaceUsed + spaceNeeded > ctx.interiorMaxBytes) {
-
-            BTreeSplitKey copyKey = ctx.splitKey.duplicate(ctx.leafFrame.getTupleWriter().createTupleReference());
-            tuple = copyKey.getTuple();
-
-            frontier.lastTuple.resetByTupleIndex(ctx.interiorFrame, ctx.interiorFrame.getTupleCount() - 1);
-            int splitKeySize = ctx.tupleWriter.bytesRequired(frontier.lastTuple, 0, ctx.cmp.getKeyFieldCount());
-            ctx.splitKey.initData(splitKeySize);
-            ctx.tupleWriter
-                    .writeTupleFields(frontier.lastTuple, 0, ctx.cmp.getKeyFieldCount(), ctx.splitKey.getBuffer().array(), 0);
-            ctx.splitKey.getTuple().resetByTupleOffset(ctx.splitKey.getBuffer(), 0);
-            ctx.splitKey.setLeftPage(frontier.pageId);
-
-            ctx.interiorFrame.deleteGreatest();
-
-            frontier.page.releaseWriteLatch();
-            bufferCache.unpin(frontier.page);
-            frontier.pageId = freePageManager.getFreePage(ctx.metaFrame);
-
-            ctx.splitKey.setRightPage(frontier.pageId);
-            propagateBulk(ctx, level + 1);
-
-            frontier.page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, frontier.pageId), true);
-            frontier.page.acquireWriteLatch();
-            ctx.interiorFrame.setPage(frontier.page);
-            ctx.interiorFrame.initBuffer((byte) level);
-        }
-        ctx.interiorFrame.insertSorted(tuple);
-    }
-
-    // assumes btree has been created and opened
-    @Override
-    public IIndexBulkLoadContext beginBulkLoad(float fillFactor) throws TreeIndexException, HyracksDataException {
-        IBTreeLeafFrame leafFrame = (IBTreeLeafFrame)leafFrameFactory.createFrame();
-    	if (!isEmptyTree(leafFrame)) {
-    		throw new BTreeException("Trying to Bulk-load a non-empty BTree.");
-    	}
-    	
-        BulkLoadContext ctx = new BulkLoadContext(fillFactor, leafFrame,
-                (IBTreeInteriorFrame)interiorFrameFactory.createFrame(), freePageManager.getMetaDataFrameFactory().createFrame(), cmpFactories);
-        ctx.splitKey.getTuple().setFieldCount(ctx.cmp.getKeyFieldCount());
-        return ctx;
-    }
-
-    @Override
-    public void bulkLoadAddTuple(ITupleReference tuple, IIndexBulkLoadContext ictx) throws HyracksDataException {
-        BulkLoadContext ctx = (BulkLoadContext) ictx;
-        NodeFrontier leafFrontier = ctx.nodeFrontiers.get(0);
-        IBTreeLeafFrame leafFrame = ctx.leafFrame;
-
-        int spaceNeeded = ctx.tupleWriter.bytesRequired(tuple) + ctx.slotSize;
-        int spaceUsed = leafFrame.getBuffer().capacity() - leafFrame.getTotalFreeSpace();
-
-        // try to free space by compression
-        if (spaceUsed + spaceNeeded > ctx.leafMaxBytes) {
-            leafFrame.compress();
-            spaceUsed = leafFrame.getBuffer().capacity() - leafFrame.getTotalFreeSpace();
-        }
-
-        if (spaceUsed + spaceNeeded > ctx.leafMaxBytes) {
-            leafFrontier.lastTuple.resetByTupleIndex(leafFrame, leafFrame.getTupleCount() - 1);
-            int splitKeySize = ctx.tupleWriter.bytesRequired(leafFrontier.lastTuple, 0, ctx.cmp.getKeyFieldCount());
-            ctx.splitKey.initData(splitKeySize);
-            ctx.tupleWriter.writeTupleFields(leafFrontier.lastTuple, 0, ctx.cmp.getKeyFieldCount(),
-                    ctx.splitKey.getBuffer().array(), 0);
-            ctx.splitKey.getTuple().resetByTupleOffset(ctx.splitKey.getBuffer(), 0);
-            ctx.splitKey.setLeftPage(leafFrontier.pageId);
-            leafFrontier.pageId = freePageManager.getFreePage(ctx.metaFrame);
-
-            leafFrame.setNextLeaf(leafFrontier.pageId);
-            leafFrontier.page.releaseWriteLatch();
-            bufferCache.unpin(leafFrontier.page);
-
-            ctx.splitKey.setRightPage(leafFrontier.pageId);
-            propagateBulk(ctx, 1);
-
-            leafFrontier.page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, leafFrontier.pageId),
-                    true);
-            leafFrontier.page.acquireWriteLatch();
-            leafFrame.setPage(leafFrontier.page);
-            leafFrame.initBuffer((byte) 0);
-        }
-
-        leafFrame.setPage(leafFrontier.page);
-        leafFrame.insertSorted(tuple);
-    }
-
-    @Override
-    public void endBulkLoad(IIndexBulkLoadContext ictx) throws HyracksDataException {
-        // copy root
-        BulkLoadContext ctx = (BulkLoadContext) ictx;
-        ICachedPage rootNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, rootPage), true);
-        rootNode.acquireWriteLatch();
-        NodeFrontier lastNodeFrontier = ctx.nodeFrontiers.get(ctx.nodeFrontiers.size() - 1);
-        IBTreeInteriorFrame interiorFrame = ctx.interiorFrame;
-        try {
-            ICachedPage toBeRoot = lastNodeFrontier.page;
-            System.arraycopy(toBeRoot.getBuffer().array(), 0, rootNode.getBuffer().array(), 0, toBeRoot.getBuffer()
-                    .capacity());
-        } finally {
-            rootNode.releaseWriteLatch();
-            bufferCache.unpin(rootNode);
-
-            // register old root as free page
-            freePageManager.addFreePage(ctx.metaFrame, lastNodeFrontier.pageId);
-
-            // make old root a free page
-            interiorFrame.setPage(lastNodeFrontier.page);
-            interiorFrame.initBuffer(freePageManager.getFreePageLevelIndicator());
-
-            // cleanup
-            for (int i = 0; i < ctx.nodeFrontiers.size(); i++) {
-                ctx.nodeFrontiers.get(i).page.releaseWriteLatch();
-                bufferCache.unpin(ctx.nodeFrontiers.get(i).page);
-            }
-        }
-    }
-
-    private BTreeOpContext createOpContext() {
-        return new BTreeOpContext(leafFrameFactory, interiorFrameFactory, freePageManager.getMetaDataFrameFactory()
-                .createFrame(), cmpFactories);
-    }
-    
-    public ITreeIndexFrameFactory getInteriorFrameFactory() {
-        return interiorFrameFactory;
-    }
-
-    public ITreeIndexFrameFactory getLeafFrameFactory() {
-        return leafFrameFactory;
-    }
-
-    public IBinaryComparatorFactory[] getComparatorFactories() {
-        return cmpFactories;
-    }
-
-    public IFreePageManager getFreePageManager() {
-        return freePageManager;
-    }
-
-    public int getRootPageId() {
-        return rootPage;
-    }    
-
-    @Override
-    public int getFieldCount() {
-        return fieldCount;
-    }
-
-    @Override
-    public IndexType getIndexType() {
-        return IndexType.BTREE;
-    }
-    
-    @Override
-    public int getFileId() {
-    	return fileId;
-    }
-    
-    @Override
-    public IBufferCache getBufferCache() {
-        return bufferCache;
-    }
-    
-    public byte getTreeHeight(IBTreeLeafFrame leafFrame) throws HyracksDataException {
-        ICachedPage rootNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, rootPage), false);
-        rootNode.acquireReadLatch();
-        try {
-            leafFrame.setPage(rootNode);
-            return leafFrame.getLevel();
-        } finally {
-            rootNode.releaseReadLatch();
-            bufferCache.unpin(rootNode);
-        }
-    }
-    
-    public boolean isEmptyTree(IBTreeLeafFrame leafFrame) throws HyracksDataException {
-    	ICachedPage rootNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, rootPage), false);
-        rootNode.acquireReadLatch();
-        try {
-            leafFrame.setPage(rootNode);
-            if (leafFrame.getLevel() == 0 && leafFrame.getTupleCount() == 0) {
-            	return true;
-            } else {
-            	return false;
-            }
-        } finally {
-            rootNode.releaseReadLatch();
-            bufferCache.unpin(rootNode);
-        }
-    }
-    
-    @SuppressWarnings("rawtypes") 
-    public String printTree(IBTreeLeafFrame leafFrame, IBTreeInteriorFrame interiorFrame, ISerializerDeserializer[] keySerdes)
-            throws Exception {
+    @SuppressWarnings("rawtypes")
+    public String printTree(IBTreeLeafFrame leafFrame, IBTreeInteriorFrame interiorFrame,
+            ISerializerDeserializer[] keySerdes) throws Exception {
         MultiComparator cmp = MultiComparator.create(cmpFactories);
         byte treeHeight = getTreeHeight(leafFrame);
         StringBuilder strBuilder = new StringBuilder();
@@ -963,9 +778,10 @@
         return strBuilder.toString();
     }
 
-    @SuppressWarnings("rawtypes") 
+    @SuppressWarnings("rawtypes")
     public void printTree(int pageId, ICachedPage parent, boolean unpin, IBTreeLeafFrame leafFrame,
-            IBTreeInteriorFrame interiorFrame, byte treeHeight, ISerializerDeserializer[] keySerdes, StringBuilder strBuilder, MultiComparator cmp) throws Exception {
+            IBTreeInteriorFrame interiorFrame, byte treeHeight, ISerializerDeserializer[] keySerdes,
+            StringBuilder strBuilder, MultiComparator cmp) throws Exception {
         ICachedPage node = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, pageId), false);
         node.acquireReadLatch();
         try {
@@ -984,16 +800,17 @@
             String keyString;
             if (interiorFrame.isLeaf()) {
                 leafFrame.setPage(node);
-                keyString = TreeIndexUtils.printFrameTuples(leafFrame, keySerdes);
+                keyString = printLeafFrameTuples(leafFrame, keySerdes);
             } else {
-                keyString = TreeIndexUtils.printFrameTuples(interiorFrame, keySerdes);
+                keyString = printInteriorFrameTuples(interiorFrame, keySerdes);
             }
 
             strBuilder.append(keyString + "\n");
             if (!interiorFrame.isLeaf()) {
                 ArrayList<Integer> children = ((BTreeNSMInteriorFrame) (interiorFrame)).getChildren(cmp);
                 for (int i = 0; i < children.size(); i++) {
-                    printTree(children.get(i), node, i == children.size() - 1, leafFrame, interiorFrame, treeHeight, keySerdes, strBuilder, cmp);
+                    printTree(children.get(i), node, i == children.size() - 1, leafFrame, interiorFrame, treeHeight,
+                            keySerdes, strBuilder, cmp);
                 }
             } else {
                 node.releaseReadLatch();
@@ -1007,75 +824,259 @@
     }
 
     @Override
-    public ITreeIndexAccessor createAccessor() {
-        return new BTreeAccessor(this);
+    public ITreeIndexAccessor createAccessor(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback) {
+        return new BTreeAccessor(this, modificationCallback, searchCallback);
     }
-    
-	// TODO: Class should be private. But currently we need to expose the
-	// setOpContext() API to the LSM Tree for it to work correctly.
+
+    // TODO: Class should be private. But currently we need to expose the
+    // setOpContext() API to the LSM Tree for it to work correctly.
     public class BTreeAccessor implements ITreeIndexAccessor {
         private BTree btree;
         private BTreeOpContext ctx;
-        
-        public BTreeAccessor(BTree btree) {
+
+        public BTreeAccessor(BTree btree, IModificationOperationCallback modificationCalback,
+                ISearchOperationCallback searchCallback) {
             this.btree = btree;
-            this.ctx = btree.createOpContext();
+            this.ctx = btree.createOpContext(this, modificationCalback, searchCallback);
         }
-        
+
         @Override
         public void insert(ITupleReference tuple) throws HyracksDataException, TreeIndexException {
-            ctx.reset(IndexOp.INSERT);
+            ctx.setOperation(IndexOperation.INSERT);
             btree.insert(tuple, ctx);
         }
 
         @Override
         public void update(ITupleReference tuple) throws HyracksDataException, TreeIndexException {
-            ctx.reset(IndexOp.UPDATE);
+            ctx.setOperation(IndexOperation.UPDATE);
             btree.update(tuple, ctx);
         }
 
         @Override
         public void delete(ITupleReference tuple) throws HyracksDataException, TreeIndexException {
-            ctx.reset(IndexOp.DELETE);
+            ctx.setOperation(IndexOperation.DELETE);
             btree.delete(tuple, ctx);
         }
-        
+
         @Override
         public void upsert(ITupleReference tuple) throws HyracksDataException, TreeIndexException {
-            ctx.reset(IndexOp.UPSERT);
+            upsertIfConditionElseInsert(tuple, UnconditionalTupleAcceptor.INSTANCE);
+        }
+
+        public void upsertIfConditionElseInsert(ITupleReference tuple, ITupleAcceptor acceptor)
+                throws HyracksDataException, TreeIndexException {
+            ctx.setOperation(IndexOperation.UPSERT);
+            ctx.acceptor = acceptor;
             btree.upsert(tuple, ctx);
         }
-        
+
         @Override
-		public ITreeIndexCursor createSearchCursor() {
-			IBTreeLeafFrame leafFrame = (IBTreeLeafFrame) btree.getLeafFrameFactory().createFrame();
-	        return new BTreeRangeSearchCursor(leafFrame, false);
-		}
-        
+        public ITreeIndexCursor createSearchCursor() {
+            IBTreeLeafFrame leafFrame = (IBTreeLeafFrame) btree.getLeafFrameFactory().createFrame();
+            return new BTreeRangeSearchCursor(leafFrame, false);
+        }
+
         @Override
         public void search(IIndexCursor cursor, ISearchPredicate searchPred) throws HyracksDataException,
                 TreeIndexException {
-            ctx.reset(IndexOp.SEARCH);
+            ctx.setOperation(IndexOperation.SEARCH);
             btree.search((ITreeIndexCursor) cursor, searchPred, ctx);
         }
 
         @Override
-		public ITreeIndexCursor createDiskOrderScanCursor() {
-			IBTreeLeafFrame leafFrame = (IBTreeLeafFrame) btree.getLeafFrameFactory().createFrame();
-	        return new TreeDiskOrderScanCursor(leafFrame);
-		}
-        
+        public ITreeIndexCursor createDiskOrderScanCursor() {
+            IBTreeLeafFrame leafFrame = (IBTreeLeafFrame) btree.getLeafFrameFactory().createFrame();
+            return new TreeIndexDiskOrderScanCursor(leafFrame);
+        }
+
         @Override
         public void diskOrderScan(ITreeIndexCursor cursor) throws HyracksDataException {
-            ctx.reset(IndexOp.DISKORDERSCAN);
+            ctx.setOperation(IndexOperation.DISKORDERSCAN);
             btree.diskOrderScan(cursor, ctx);
         }
-		
-		// TODO: Ideally, this method should not exist. But we need it for
-		// the changing the leafFrame and leafFrameFactory of the op context for
-		// the LSM-BTree to work correctly.
-		public BTreeOpContext getOpContext() {
-			return ctx;
-		}
+
+        // TODO: Ideally, this method should not exist. But we need it for
+        // the changing the leafFrame and leafFrameFactory of the op context for
+        // the LSM-BTree to work correctly.
+        public BTreeOpContext getOpContext() {
+            return ctx;
+        }
+
+        public ITreeIndexCursor createCountingSearchCursor() {
+            IBTreeLeafFrame leafFrame = (IBTreeLeafFrame) btree.getLeafFrameFactory().createFrame();
+            return new BTreeCountingSearchCursor(leafFrame, false);
+        }
+    }
+
+    @Override
+    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
+            throws TreeIndexException {
+        try {
+            return new BTreeBulkLoader(fillFactor, verifyInput);
+        } catch (HyracksDataException e) {
+            throw new TreeIndexException(e);
+        }
+    }
+
+    public class BTreeBulkLoader extends AbstractTreeIndex.AbstractTreeIndexBulkLoader {
+        protected final ISplitKey splitKey;
+        protected final boolean verifyInput;
+
+        public BTreeBulkLoader(float fillFactor, boolean verifyInput) throws TreeIndexException, HyracksDataException {
+            super(fillFactor);
+            this.verifyInput = verifyInput;
+            splitKey = new BTreeSplitKey(leafFrame.getTupleWriter().createTupleReference());
+            splitKey.getTuple().setFieldCount(cmp.getKeyFieldCount());
+        }
+
+        @Override
+        public void add(ITupleReference tuple) throws IndexException, HyracksDataException {
+            try {
+                NodeFrontier leafFrontier = nodeFrontiers.get(0);
+
+                int spaceNeeded = tupleWriter.bytesRequired(tuple) + slotSize;
+                int spaceUsed = leafFrame.getBuffer().capacity() - leafFrame.getTotalFreeSpace();
+
+                // try to free space by compression
+                if (spaceUsed + spaceNeeded > leafMaxBytes) {
+                    leafFrame.compress();
+                    spaceUsed = leafFrame.getBuffer().capacity() - leafFrame.getTotalFreeSpace();
+                }
+
+                if (spaceUsed + spaceNeeded > leafMaxBytes) {
+                    leafFrontier.lastTuple.resetByTupleIndex(leafFrame, leafFrame.getTupleCount() - 1);
+                    if (verifyInput) {
+                        verifyInputTuple(tuple, leafFrontier.lastTuple);
+                    }
+                    int splitKeySize = tupleWriter.bytesRequired(leafFrontier.lastTuple, 0, cmp.getKeyFieldCount());
+                    splitKey.initData(splitKeySize);
+                    tupleWriter.writeTupleFields(leafFrontier.lastTuple, 0, cmp.getKeyFieldCount(), splitKey
+                            .getBuffer().array(), 0);
+                    splitKey.getTuple().resetByTupleOffset(splitKey.getBuffer(), 0);
+                    splitKey.setLeftPage(leafFrontier.pageId);
+                    leafFrontier.pageId = freePageManager.getFreePage(metaFrame);
+
+                    ((IBTreeLeafFrame) leafFrame).setNextLeaf(leafFrontier.pageId);
+                    leafFrontier.page.releaseWriteLatch();
+                    bufferCache.unpin(leafFrontier.page);
+
+                    splitKey.setRightPage(leafFrontier.pageId);
+                    propagateBulk(1);
+
+                    leafFrontier.page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, leafFrontier.pageId),
+                            true);
+                    leafFrontier.page.acquireWriteLatch();
+                    leafFrame.setPage(leafFrontier.page);
+                    leafFrame.initBuffer((byte) 0);
+                } else {
+                    if (verifyInput && leafFrame.getTupleCount() > 0) {
+                        leafFrontier.lastTuple.resetByTupleIndex(leafFrame, leafFrame.getTupleCount() - 1);
+                        verifyInputTuple(tuple, leafFrontier.lastTuple);
+                    }
+                }
+
+                leafFrame.setPage(leafFrontier.page);
+                ((IBTreeLeafFrame) leafFrame).insertSorted(tuple);
+            } catch (IndexException e) {
+                handleException();
+                throw e;
+            } catch (HyracksDataException e) {
+                handleException();
+                throw e;
+            } catch (RuntimeException e) {
+                handleException();
+                throw e;
+            }
+        }
+
+        protected void verifyInputTuple(ITupleReference tuple, ITupleReference prevTuple) throws IndexException,
+                HyracksDataException {
+            // New tuple should be strictly greater than last tuple.
+            if (cmp.compare(tuple, prevTuple) <= 0) {
+                throw new UnsortedInputException("Input stream given to BTree bulk load is not sorted.");
+            }
+        }
+
+        protected void propagateBulk(int level) throws HyracksDataException {
+            if (splitKey.getBuffer() == null)
+                return;
+
+            if (level >= nodeFrontiers.size())
+                addLevel();
+
+            NodeFrontier frontier = nodeFrontiers.get(level);
+            interiorFrame.setPage(frontier.page);
+
+            ITupleReference tuple = splitKey.getTuple();
+            int spaceNeeded = tupleWriter.bytesRequired(tuple, 0, cmp.getKeyFieldCount()) + slotSize + 4;
+            int spaceUsed = interiorFrame.getBuffer().capacity() - interiorFrame.getTotalFreeSpace();
+            if (spaceUsed + spaceNeeded > interiorMaxBytes) {
+
+                ISplitKey copyKey = splitKey.duplicate(leafFrame.getTupleWriter().createTupleReference());
+                tuple = copyKey.getTuple();
+
+                frontier.lastTuple.resetByTupleIndex(interiorFrame, interiorFrame.getTupleCount() - 1);
+                int splitKeySize = tupleWriter.bytesRequired(frontier.lastTuple, 0, cmp.getKeyFieldCount());
+                splitKey.initData(splitKeySize);
+                tupleWriter.writeTupleFields(frontier.lastTuple, 0, cmp.getKeyFieldCount(), splitKey.getBuffer()
+                        .array(), 0);
+                splitKey.getTuple().resetByTupleOffset(splitKey.getBuffer(), 0);
+                splitKey.setLeftPage(frontier.pageId);
+
+                ((IBTreeInteriorFrame) interiorFrame).deleteGreatest();
+
+                frontier.page.releaseWriteLatch();
+                bufferCache.unpin(frontier.page);
+                frontier.pageId = freePageManager.getFreePage(metaFrame);
+
+                splitKey.setRightPage(frontier.pageId);
+                propagateBulk(level + 1);
+
+                frontier.page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, frontier.pageId), true);
+                frontier.page.acquireWriteLatch();
+                interiorFrame.setPage(frontier.page);
+                interiorFrame.initBuffer((byte) level);
+            }
+            ((IBTreeInteriorFrame) interiorFrame).insertSorted(tuple);
+        }
+
+    }
+
+    @SuppressWarnings("rawtypes")
+    public static String printLeafFrameTuples(IBTreeLeafFrame leafFrame, ISerializerDeserializer[] fieldSerdes)
+            throws HyracksDataException {
+        StringBuilder strBuilder = new StringBuilder();
+        ITreeIndexTupleReference tuple = leafFrame.createTupleReference();
+        for (int i = 0; i < leafFrame.getTupleCount(); i++) {
+            tuple.resetByTupleIndex(leafFrame, i);
+            String tupleString = TupleUtils.printTuple(tuple, fieldSerdes);
+            strBuilder.append(tupleString + " | ");
+        }
+        // Print right link.
+        int rightPageId = leafFrame.getNextLeaf();
+        strBuilder.append("(" + rightPageId + ")");
+        return strBuilder.toString();
+    }
+
+    @SuppressWarnings("rawtypes")
+    public static String printInteriorFrameTuples(IBTreeInteriorFrame interiorFrame,
+            ISerializerDeserializer[] fieldSerdes) throws HyracksDataException {
+        StringBuilder strBuilder = new StringBuilder();
+        ITreeIndexTupleReference tuple = interiorFrame.createTupleReference();
+        for (int i = 0; i < interiorFrame.getTupleCount(); i++) {
+            tuple.resetByTupleIndex(interiorFrame, i);
+            // Print child pointer.
+            int numFields = tuple.getFieldCount();
+            int childPageId = IntegerSerializerDeserializer.getInt(tuple.getFieldData(numFields - 1),
+                    tuple.getFieldStart(numFields - 1) + tuple.getFieldLength(numFields - 1));
+            strBuilder.append("(" + childPageId + ") ");
+            String tupleString = TupleUtils.printTuple(tuple, fieldSerdes);
+            strBuilder.append(tupleString + " | ");
+        }
+        // Print rightmost pointer.
+        int rightMostChildPageId = interiorFrame.getRightmostChildPageId();
+        strBuilder.append("(" + rightMostChildPageId + ")");
+        return strBuilder.toString();
     }
 }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeCountingSearchCursor.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeCountingSearchCursor.java
new file mode 100644
index 0000000..0ed1dbe
--- /dev/null
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeCountingSearchCursor.java
@@ -0,0 +1,249 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.btree.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.FindTupleMode;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.FindTupleNoExactMatchPolicy;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+
+public class BTreeCountingSearchCursor implements ITreeIndexCursor {
+
+    private int fileId = -1;
+    private ICachedPage page = null;
+    private IBufferCache bufferCache = null;
+
+    private int tupleIndex = 0;
+    private int stopTupleIndex;
+    private int count = -1;
+
+    private FindTupleMode lowKeyFtm;
+    private FindTupleMode highKeyFtm;
+
+    private FindTupleNoExactMatchPolicy lowKeyFtp;
+    private FindTupleNoExactMatchPolicy highKeyFtp;
+
+    private final IBTreeLeafFrame frame;
+    private final ITreeIndexTupleReference frameTuple;
+    private final boolean exclusiveLatchNodes;
+
+    private RangePredicate pred;
+    private MultiComparator lowKeyCmp;
+    private MultiComparator highKeyCmp;
+    private ITupleReference lowKey;
+    private ITupleReference highKey;
+
+    // For storing the count.
+    private byte[] countBuf = new byte[4];
+    private ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(1);
+    private ArrayTupleReference countTuple = new ArrayTupleReference();    
+    
+    public BTreeCountingSearchCursor(IBTreeLeafFrame frame, boolean exclusiveLatchNodes) {
+        this.frame = frame;
+        this.frameTuple = frame.createTupleReference();
+        this.exclusiveLatchNodes = exclusiveLatchNodes;
+    }
+
+    @Override
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws HyracksDataException {
+        // in case open is called multiple times without closing
+        if (page != null) {
+            if (exclusiveLatchNodes) {
+                page.releaseWriteLatch();
+            } else {
+                page.releaseReadLatch();
+            }
+            bufferCache.unpin(page);
+        }
+
+        page = ((BTreeCursorInitialState) initialState).getPage();
+        frame.setPage(page);
+
+        pred = (RangePredicate) searchPred;
+        lowKeyCmp = pred.getLowKeyComparator();
+        highKeyCmp = pred.getHighKeyComparator();
+
+        lowKey = pred.getLowKey();
+        highKey = pred.getHighKey();
+
+        // init
+        lowKeyFtm = FindTupleMode.EXCLUSIVE;
+        if (pred.lowKeyInclusive) {
+            lowKeyFtp = FindTupleNoExactMatchPolicy.LOWER_KEY;
+        } else {
+            lowKeyFtp = FindTupleNoExactMatchPolicy.HIGHER_KEY;
+        }
+
+        highKeyFtm = FindTupleMode.EXCLUSIVE;
+        if (pred.highKeyInclusive) {
+            highKeyFtp = FindTupleNoExactMatchPolicy.HIGHER_KEY;
+        } else {
+            highKeyFtp = FindTupleNoExactMatchPolicy.LOWER_KEY;
+        }
+
+        tupleIndex = getLowKeyIndex();
+        stopTupleIndex = getHighKeyIndex();        
+    }
+
+    private void fetchNextLeafPage(int nextLeafPage) throws HyracksDataException {
+        do {
+            ICachedPage nextLeaf = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, nextLeafPage), false);
+            if (exclusiveLatchNodes) {
+                nextLeaf.acquireWriteLatch();
+                page.releaseWriteLatch();
+            } else {
+                nextLeaf.acquireReadLatch();
+                page.releaseReadLatch();
+            }
+            bufferCache.unpin(page);
+            page = nextLeaf;
+            frame.setPage(page);
+            nextLeafPage = frame.getNextLeaf();
+        } while (frame.getTupleCount() == 0 && nextLeafPage > 0);
+    }
+
+    private int getLowKeyIndex() throws HyracksDataException {
+        if (lowKey == null) {
+            return 0;
+        }
+        int index = frame.findTupleIndex(lowKey, frameTuple, lowKeyCmp, lowKeyFtm, lowKeyFtp);
+        if (pred.lowKeyInclusive) {
+            index++;
+        } else {
+            if (index < 0) {
+                index = frame.getTupleCount();
+            }
+        }
+        return index;
+    }
+
+    private int getHighKeyIndex() throws HyracksDataException {
+        if (highKey == null) {
+            return frame.getTupleCount() - 1;
+        }
+        int index = frame.findTupleIndex(highKey, frameTuple, highKeyCmp, highKeyFtm, highKeyFtp);
+        if (pred.highKeyInclusive) {
+            if (index < 0) {
+                index = frame.getTupleCount() - 1;
+            } else {
+                index--;
+            }
+        }
+        return index;
+    }
+
+    @Override
+    public boolean hasNext() throws HyracksDataException {
+        // get the count for the current page
+        // follow the sibling pointer until last page
+        // if no more tuples on a page, then done
+
+        if (count < 0) {
+            count = 0;
+
+            while (stopTupleIndex >= 0 || frame.getTupleCount() == 0) {
+                count += (stopTupleIndex - tupleIndex + 1);
+
+                int nextLeafPage = frame.getNextLeaf();
+                if (nextLeafPage >= 0) {
+                    fetchNextLeafPage(nextLeafPage);
+                } else {
+                    // No more pages. Done counting!
+                    break;
+                }
+
+                tupleIndex = 0;
+                stopTupleIndex = getHighKeyIndex();
+            }
+
+            return true;
+        }
+
+        return false;
+    }
+
+    @Override
+    public void next() throws HyracksDataException {
+        // Do nothing. Count is performed just once!
+        IntegerSerializerDeserializer.putInt(count, countBuf, 0);
+        tupleBuilder.addField(countBuf, 0, 4);
+        countTuple.reset(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray());
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        if (page != null) {
+            if (exclusiveLatchNodes) {
+                page.releaseWriteLatch();
+            } else {
+                page.releaseReadLatch();
+            }
+            bufferCache.unpin(page);
+        }
+        tupleBuilder.reset();
+        tupleIndex = 0;
+        page = null;
+        pred = null;
+        count = -1;
+    }
+
+    @Override
+    public void reset() {
+        try {
+            close();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }        
+    }
+
+    @Override
+    public ITupleReference getTuple() {
+        return countTuple;
+    }
+
+    @Override
+    public ICachedPage getPage() {
+        return page;
+    }
+
+    @Override
+    public void setBufferCache(IBufferCache bufferCache) {
+        this.bufferCache = bufferCache;
+    }
+
+    @Override
+    public void setFileId(int fileId) {
+        this.fileId = fileId;
+    }
+
+    @Override
+    public boolean exclusiveLatchNodes() {
+        return exclusiveLatchNodes;
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeCursorInitialState.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeCursorInitialState.java
index 855f9e6..9d7b612 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeCursorInitialState.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeCursorInitialState.java
@@ -1,14 +1,28 @@
 package edu.uci.ics.hyracks.storage.am.btree.impls;
 
 import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
 
 public class BTreeCursorInitialState implements ICursorInitialState {
 
+    // This is only used by the LSM-RTree
+    private int pageId;
     private ICachedPage page;
+    private ISearchOperationCallback searchCallback;
+    private MultiComparator originalKeyCmp;
+    private final IIndexAccessor accessor;
 
-    public BTreeCursorInitialState(ICachedPage page) {
+    public BTreeCursorInitialState(ICachedPage page, ISearchOperationCallback searchCallback, IIndexAccessor accessor) {
         this.page = page;
+        this.searchCallback = searchCallback;
+        this.accessor = accessor;
+    }
+    
+    public IIndexAccessor getAccessor() {
+        return accessor;
     }
 
     public ICachedPage getPage() {
@@ -18,4 +32,32 @@
     public void setPage(ICachedPage page) {
         this.page = page;
     }
+
+    public int getPageId() {
+        return pageId;
+    }
+
+    public void setPageId(int pageId) {
+        this.pageId = pageId;
+    }
+
+    @Override
+    public ISearchOperationCallback getSearchOperationCallback() {
+        return searchCallback;
+    }
+
+    @Override
+    public void setSearchOperationCallback(ISearchOperationCallback searchCallback) {
+        this.searchCallback = searchCallback;
+    }
+
+    @Override
+    public MultiComparator getOriginalKeyComparator() {
+        return originalKeyCmp;
+    }
+
+    @Override
+    public void setOriginialKeyComparator(MultiComparator originalCmp) {
+        this.originalKeyCmp = originalCmp;
+    }
 }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeOpContext.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeOpContext.java
index 23a14eb..6991850 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeOpContext.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeOpContext.java
@@ -15,52 +15,94 @@
 
 package edu.uci.ics.hyracks.storage.am.btree.impls;
 
+import java.util.ArrayDeque;
+import java.util.Deque;
+
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
 import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeInteriorFrame;
 import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexOpContext;
+import edu.uci.ics.hyracks.storage.am.btree.api.ITupleAcceptor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrame;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOp;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.IntArrayList;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.LongArrayList;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 
-public class BTreeOpContext implements IIndexOpContext {
+public class BTreeOpContext implements IIndexOperationContext {
     private final int INIT_ARRAYLIST_SIZE = 6;
+
+    public IIndexAccessor accessor;
     public MultiComparator cmp;
     public ITreeIndexFrameFactory leafFrameFactory;
     public ITreeIndexFrameFactory interiorFrameFactory;
     public IBTreeLeafFrame leafFrame;
     public IBTreeInteriorFrame interiorFrame;
     public ITreeIndexMetaDataFrame metaFrame;
-    public IndexOp op;
+    public IndexOperation op;
     public ITreeIndexCursor cursor;
     public BTreeCursorInitialState cursorInitialState;
     public RangePredicate pred;
-    public BTreeSplitKey splitKey;    
+    public BTreeSplitKey splitKey;
     public LongArrayList pageLsns;
     public IntArrayList smPages;
     public IntArrayList freePages;
     public int opRestarts = 0;
     public boolean exceptionHandled;
-    
-    public BTreeOpContext(ITreeIndexFrameFactory leafFrameFactory, ITreeIndexFrameFactory interiorFrameFactory,
-            ITreeIndexMetaDataFrame metaFrame, IBinaryComparatorFactory[] cmpFactories) {
-        this.cmp = MultiComparator.create(cmpFactories);
+    public IModificationOperationCallback modificationCallback;
+    public ISearchOperationCallback searchCallback;
+    public ITupleAcceptor acceptor;
+    public int smoCount;
+
+    // Debug
+    public final Deque<PageValidationInfo> validationInfos;
+    public final ITreeIndexTupleReference interiorFrameTuple;
+    public final ITreeIndexTupleReference leafFrameTuple;
+
+    public BTreeOpContext(IIndexAccessor accessor, ITreeIndexFrameFactory leafFrameFactory,
+            ITreeIndexFrameFactory interiorFrameFactory, ITreeIndexMetaDataFrame metaFrame,
+            IBinaryComparatorFactory[] cmpFactories, IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback) {
+        this.accessor = accessor;
+
+        if (cmpFactories[0] != null) {
+            //            this.cmp = MultiComparator.createIgnoreFieldLength(cmpFactories);
+            this.cmp = MultiComparator.create(cmpFactories);
+        } else {
+            this.cmp = null;
+        }
+
         this.leafFrameFactory = leafFrameFactory;
         this.leafFrame = (IBTreeLeafFrame) leafFrameFactory.createFrame();
-        if (leafFrame != null) {
+        if (leafFrame != null && this.cmp != null) {
             leafFrame.setMultiComparator(cmp);
         }
         this.interiorFrameFactory = interiorFrameFactory;
         this.interiorFrame = (IBTreeInteriorFrame) interiorFrameFactory.createFrame();
-        if (interiorFrame != null) {
+        if (interiorFrame != null && this.cmp != null) {
             interiorFrame.setMultiComparator(cmp);
         }
         this.metaFrame = metaFrame;
         this.pageLsns = new LongArrayList(INIT_ARRAYLIST_SIZE, INIT_ARRAYLIST_SIZE);
+        this.smoCount = 0;
+        this.modificationCallback = modificationCallback;
+        this.searchCallback = searchCallback;
+
+        // Debug
+        this.validationInfos = new ArrayDeque<PageValidationInfo>(INIT_ARRAYLIST_SIZE);
+        this.interiorFrameTuple = interiorFrame.createTupleReference();
+        this.leafFrameTuple = leafFrame.createTupleReference();
     }
 
     public void reset() {
@@ -71,14 +113,15 @@
         if (smPages != null)
             smPages.clear();
         opRestarts = 0;
+        smoCount = 0;
         exceptionHandled = false;
     }
 
     @Override
-    public void reset(IndexOp newOp) {
-        if (newOp == IndexOp.SEARCH || newOp == IndexOp.DISKORDERSCAN) {
+    public void setOperation(IndexOperation newOp) {
+        if (newOp == IndexOperation.SEARCH || newOp == IndexOperation.DISKORDERSCAN) {
             if (cursorInitialState == null) {
-                cursorInitialState = new BTreeCursorInitialState(null);
+                cursorInitialState = new BTreeCursorInitialState(null, searchCallback, accessor);
             }
         } else {
             // Insert, delete, update or upsert operation.
@@ -96,6 +139,7 @@
             }
         }
         op = newOp;
+        smoCount = 0;
         exceptionHandled = false;
     }
 
@@ -106,4 +150,77 @@
     public IBTreeInteriorFrame createInteriorFrame() {
         return (IBTreeInteriorFrame) interiorFrameFactory.createFrame();
     }
+
+    public PageValidationInfo createPageValidationInfo(PageValidationInfo parent) throws HyracksDataException {
+        return new PageValidationInfo(parent);
+    }
+
+    public class PageValidationInfo {
+        public final int numKeyFields;
+
+        public final ArrayTupleBuilder lowRangeBuilder;
+        public final ArrayTupleBuilder highRangeBuilder;
+        public final ArrayTupleReference lowRangeTuple;
+        public final ArrayTupleReference highRangeTuple;
+
+        public boolean isLowRangeNull;
+        public boolean isHighRangeNull;
+
+        public PageValidationInfo() {
+            this.numKeyFields = cmp.getKeyFieldCount();
+            this.lowRangeBuilder = new ArrayTupleBuilder(numKeyFields);
+            this.highRangeBuilder = new ArrayTupleBuilder(numKeyFields);
+            this.lowRangeTuple = new ArrayTupleReference();
+            this.highRangeTuple = new ArrayTupleReference();
+            this.isLowRangeNull = true;
+            this.isHighRangeNull = true;
+        }
+
+        public PageValidationInfo(PageValidationInfo copy) throws HyracksDataException {
+            this();
+            if (copy != null) {
+                propagateLowRangeKey(copy);
+                propagateHighRangeKey(copy);
+            }
+        }
+
+        public void propagateLowRangeKey(PageValidationInfo toPropagate) throws HyracksDataException {
+            isLowRangeNull = toPropagate.isLowRangeNull;
+            if (!isLowRangeNull) {
+                adjustRangeKey(lowRangeBuilder, lowRangeTuple, toPropagate.lowRangeTuple);
+            }
+        }
+
+        public void propagateHighRangeKey(PageValidationInfo toPropagate) throws HyracksDataException {
+            isHighRangeNull = toPropagate.isHighRangeNull;
+            if (!isHighRangeNull) {
+                adjustRangeKey(highRangeBuilder, highRangeTuple, toPropagate.highRangeTuple);
+            }
+        }
+
+        public void adjustLowRangeKey(ITupleReference newLowRangeKey) throws HyracksDataException {
+            isLowRangeNull = newLowRangeKey == null ? true : false;
+            if (!isLowRangeNull) {
+                adjustRangeKey(lowRangeBuilder, lowRangeTuple, newLowRangeKey);
+            }
+        }
+
+        public void adjustHighRangeKey(ITupleReference newHighRangeKey) throws HyracksDataException {
+            isHighRangeNull = newHighRangeKey == null ? true : false;
+            if (!isHighRangeNull) {
+                adjustRangeKey(highRangeBuilder, highRangeTuple, newHighRangeKey);
+            }
+        }
+
+        private void adjustRangeKey(ArrayTupleBuilder builder, ArrayTupleReference tuple, ITupleReference newRangeKey)
+                throws HyracksDataException {
+            TupleUtils.copyTuple(builder, newRangeKey, numKeyFields);
+            tuple.reset(builder.getFieldEndOffsets(), builder.getByteArray());
+        }
+    }
+
+    @Override
+    public IndexOperation getOperation() {
+        return op;
+    }
 }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeRangeSearchCursor.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeRangeSearchCursor.java
index 8bf4db3..607e00a 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeRangeSearchCursor.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeRangeSearchCursor.java
@@ -16,12 +16,18 @@
 package edu.uci.ics.hyracks.storage.am.btree.impls;
 
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
 import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
 import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.FindTupleMode;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.FindTupleNoExactMatchPolicy;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
@@ -31,34 +37,43 @@
 
 public class BTreeRangeSearchCursor implements ITreeIndexCursor {
 
-    private int fileId = -1;
-    private ICachedPage page = null;
-    private IBufferCache bufferCache = null;
-
-    private int tupleIndex = 0;
-    private int stopTupleIndex;
-    private int tupleIndexInc = 0;
-
-    private FindTupleMode lowKeyFtm;
-    private FindTupleMode highKeyFtm;
-
-    private FindTupleNoExactMatchPolicy lowKeyFtp;
-    private FindTupleNoExactMatchPolicy highKeyFtp;
-
     private final IBTreeLeafFrame frame;
     private final ITreeIndexTupleReference frameTuple;
     private final boolean exclusiveLatchNodes;
 
+    private IBufferCache bufferCache = null;
+    private int fileId = -1;
+
+    private ICachedPage page = null;
+    private int pageId = -1; // This is used by the LSMRTree flush operation
+
+    private int tupleIndex = 0;
+    private int stopTupleIndex;
+
+    private final RangePredicate reusablePredicate;
+    private final ArrayTupleReference reconciliationTuple;
+    private IIndexAccessor accessor;
+    private ISearchOperationCallback searchCb;
+    private MultiComparator originalKeyCmp;
+    private ArrayTupleBuilder tupleBuilder;
+
+    private FindTupleMode lowKeyFtm;
+    private FindTupleMode highKeyFtm;
+    private FindTupleNoExactMatchPolicy lowKeyFtp;
+    private FindTupleNoExactMatchPolicy highKeyFtp;
+
     private RangePredicate pred;
     private MultiComparator lowKeyCmp;
     private MultiComparator highKeyCmp;
-    private ITupleReference lowKey;
+    protected ITupleReference lowKey;
     private ITupleReference highKey;
 
     public BTreeRangeSearchCursor(IBTreeLeafFrame frame, boolean exclusiveLatchNodes) {
         this.frame = frame;
         this.frameTuple = frame.createTupleReference();
         this.exclusiveLatchNodes = exclusiveLatchNodes;
+        this.reusablePredicate = new RangePredicate();
+        this.reconciliationTuple = new ArrayTupleReference();
     }
 
     @Override
@@ -71,6 +86,7 @@
             }
             bufferCache.unpin(page);
         }
+
         tupleIndex = 0;
         page = null;
         pred = null;
@@ -85,6 +101,14 @@
         return page;
     }
 
+    public int getTupleOffset() {
+        return frame.getTupleOffset(tupleIndex - 1);
+    }
+
+    public int getPageId() {
+        return pageId;
+    }
+
     private void fetchNextLeafPage(int nextLeafPage) throws HyracksDataException {
         do {
             ICachedPage nextLeaf = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, nextLeafPage), false);
@@ -96,16 +120,19 @@
                 page.releaseReadLatch();
             }
             bufferCache.unpin(page);
+
             page = nextLeaf;
             frame.setPage(page);
+            pageId = nextLeafPage;
             nextLeafPage = frame.getNextLeaf();
         } while (frame.getTupleCount() == 0 && nextLeafPage > 0);
     }
 
     @Override
     public boolean hasNext() throws HyracksDataException {
+        int nextLeafPage;
         if (tupleIndex >= frame.getTupleCount()) {
-            int nextLeafPage = frame.getNextLeaf();
+            nextLeafPage = frame.getNextLeaf();
             if (nextLeafPage >= 0) {
                 fetchNextLeafPage(nextLeafPage);
                 tupleIndex = 0;
@@ -118,23 +145,67 @@
             }
         }
 
-        frameTuple.resetByTupleIndex(frame, tupleIndex);
-        if (highKey == null || tupleIndex <= stopTupleIndex) {
-            return true;
-        } else {
+        if (tupleIndex > stopTupleIndex) {
             return false;
         }
+
+        frameTuple.resetByTupleIndex(frame, tupleIndex);
+        while (true) {
+            if (searchCb.proceed(frameTuple)) {
+                return true;
+            } else {
+                // copy the tuple before we unlatch/unpin
+                if (tupleBuilder == null) {
+                    tupleBuilder = new ArrayTupleBuilder(originalKeyCmp.getKeyFieldCount());
+                }
+                TupleUtils.copyTuple(tupleBuilder, frameTuple, originalKeyCmp.getKeyFieldCount());
+                reconciliationTuple.reset(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray());
+
+                // unlatch/unpin
+                if (exclusiveLatchNodes) {
+                    page.releaseWriteLatch();
+                } else {
+                    page.releaseReadLatch();
+                }
+                bufferCache.unpin(page);
+                page = null;
+
+                // reconcile
+                searchCb.reconcile(reconciliationTuple);
+
+                // retraverse the index looking for the reconciled key
+                reusablePredicate.setLowKey(reconciliationTuple, true);
+                try {
+                    accessor.search(this, reusablePredicate);
+                } catch (IndexException e) {
+                    throw new HyracksDataException(e);
+                }
+
+                if (stopTupleIndex < 0 || tupleIndex > stopTupleIndex) {
+                    return false;
+                }
+
+                // see if we found the tuple we reconciled on
+                frameTuple.resetByTupleIndex(frame, tupleIndex);
+                if (originalKeyCmp.compare(reconciliationTuple, frameTuple) == 0) {
+                    return true;
+                } else {
+                    searchCb.cancel(reconciliationTuple);
+                }
+            }
+        }
     }
-    
+
     @Override
     public void next() throws HyracksDataException {
-        tupleIndex += tupleIndexInc;
+        tupleIndex++;
     }
 
     private int getLowKeyIndex() throws HyracksDataException {
         if (lowKey == null) {
             return 0;
         }
+
         int index = frame.findTupleIndex(lowKey, frameTuple, lowKeyCmp, lowKeyFtm, lowKeyFtp);
         if (pred.lowKeyInclusive) {
             index++;
@@ -143,6 +214,7 @@
                 index = frame.getTupleCount();
             }
         }
+
         return index;
     }
 
@@ -150,15 +222,16 @@
         if (highKey == null) {
             return frame.getTupleCount() - 1;
         }
+
         int index = frame.findTupleIndex(highKey, frameTuple, highKeyCmp, highKeyFtm, highKeyFtp);
         if (pred.highKeyInclusive) {
             if (index < 0) {
                 index = frame.getTupleCount() - 1;
-            }
-            else {
+            } else {
                 index--;
             }
         }
+
         return index;
     }
 
@@ -173,18 +246,23 @@
             }
             bufferCache.unpin(page);
         }
-
-        page = ((BTreeCursorInitialState) initialState).getPage();
+        accessor = ((BTreeCursorInitialState) initialState).getAccessor();
+        searchCb = initialState.getSearchOperationCallback();
+        originalKeyCmp = initialState.getOriginalKeyComparator();
+        pageId = ((BTreeCursorInitialState) initialState).getPageId();
+        page = initialState.getPage();
         frame.setPage(page);
 
         pred = (RangePredicate) searchPred;
         lowKeyCmp = pred.getLowKeyComparator();
         highKeyCmp = pred.getHighKeyComparator();
-
         lowKey = pred.getLowKey();
         highKey = pred.getHighKey();
 
-        // init
+        reusablePredicate.setLowKeyComparator(originalKeyCmp);
+        reusablePredicate.setHighKeyComparator(pred.getHighKeyComparator());
+        reusablePredicate.setHighKey(pred.getHighKey(), pred.isHighKeyInclusive());
+
         lowKeyFtm = FindTupleMode.EXCLUSIVE;
         if (pred.lowKeyInclusive) {
             lowKeyFtp = FindTupleNoExactMatchPolicy.LOWER_KEY;
@@ -198,19 +276,14 @@
         } else {
             highKeyFtp = FindTupleNoExactMatchPolicy.LOWER_KEY;
         }
-        
+
         tupleIndex = getLowKeyIndex();
         stopTupleIndex = getHighKeyIndex();
-        tupleIndexInc = 1;
     }
 
     @Override
-    public void reset() {
-        try {
-            close();
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
+    public void reset() throws HyracksDataException {
+        close();
     }
 
     @Override
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeSplitKey.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeSplitKey.java
index e664e5b..2606c08 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeSplitKey.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTreeSplitKey.java
@@ -21,15 +21,16 @@
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
 
 public class BTreeSplitKey implements ISplitKey {
+    public final ITreeIndexTupleReference tuple;
+
     public byte[] data = null;
     public ByteBuffer buf = null;
-    public ITreeIndexTupleReference tuple;
     public int keySize = 0;
 
     public BTreeSplitKey(ITreeIndexTupleReference tuple) {
         this.tuple = tuple;
     }
-    
+
     public void initData(int keySize) {
         // try to reuse existing memory from a lower-level split if possible
         this.keySize = keySize;
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/FieldPrefixPrefixTupleReference.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/FieldPrefixPrefixTupleReference.java
index 80ac173..44fcdef 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/FieldPrefixPrefixTupleReference.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/FieldPrefixPrefixTupleReference.java
@@ -16,6 +16,7 @@
 package edu.uci.ics.hyracks.storage.am.btree.impls;
 
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.storage.am.btree.api.IPrefixSlotManager;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeFieldPrefixNSMLeafFrame;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleReference;
@@ -30,10 +31,11 @@
     @Override
     public void resetByTupleIndex(ITreeIndexFrame frame, int tupleIndex) {
         BTreeFieldPrefixNSMLeafFrame concreteFrame = (BTreeFieldPrefixNSMLeafFrame) frame;
-        int prefixSlotOff = concreteFrame.slotManager.getPrefixSlotOff(tupleIndex);
+        IPrefixSlotManager slotManager = concreteFrame.getSlotManager();
+        int prefixSlotOff = slotManager.getPrefixSlotOff(tupleIndex);
         int prefixSlot = concreteFrame.getBuffer().getInt(prefixSlotOff);
-        setFieldCount(concreteFrame.slotManager.decodeFirstSlotField(prefixSlot));
-        tupleStartOff = concreteFrame.slotManager.decodeSecondSlotField(prefixSlot);
+        setFieldCount(slotManager.decodeFirstSlotField(prefixSlot));
+        tupleStartOff = slotManager.decodeSecondSlotField(prefixSlot);
         buf = concreteFrame.getBuffer();
         resetByTupleOffset(buf, tupleStartOff);
     }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/FieldPrefixSlotManager.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/FieldPrefixSlotManager.java
index 6525bb9..4c66fbb 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/FieldPrefixSlotManager.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/FieldPrefixSlotManager.java
@@ -28,16 +28,17 @@
 
 public class FieldPrefixSlotManager implements IPrefixSlotManager {
 
-    private static final int slotSize = 4;
     public static final int TUPLE_UNCOMPRESSED = 0xFF;
     public static final int MAX_PREFIX_SLOTS = 0xFE;
     public static final int GREATEST_KEY_INDICATOR = 0x00FFFFFF;
     public static final int ERROR_INDICATOR = 0x00FFFFFE;
 
+    private static final int slotSize = 4;
+
     private ByteBuffer buf;
     private BTreeFieldPrefixNSMLeafFrame frame;
     private MultiComparator cmp;
-    
+
     public int decodeFirstSlotField(int slot) {
         return (slot & 0xFF000000) >>> 24;
     }
@@ -117,23 +118,17 @@
             }
         }
 
-        // System.out.println("SLOTLBOUND: " + tuplePrefixSlotNumLbound);
-        // System.out.println("SLOTUBOUND: " + tuplePrefixSlotNumUbound);
-
         int tupleMid = -1;
         int tupleBegin = 0;
         int tupleEnd = frame.getTupleCount() - 1;
 
-        // binary search on tuples, guided by the lower and upper bounds on
-        // prefixSlotNum
+        // binary search on tuples, guided by the lower and upper bounds on prefixSlotNum
         while (tupleBegin <= tupleEnd) {
             tupleMid = (tupleBegin + tupleEnd) / 2;
             int tupleSlotOff = getTupleSlotOff(tupleMid);
             int tupleSlot = buf.getInt(tupleSlotOff);
             int prefixSlotNum = decodeFirstSlotField(tupleSlot);
 
-            // System.out.println("RECS: " + recBegin + " " + recMid + " " +
-            // recEnd);
             int cmp = 0;
             if (prefixSlotNum == TUPLE_UNCOMPRESSED) {
                 frameTuple.resetByTupleIndex(frame, tupleMid);
@@ -160,18 +155,15 @@
                     else
                         tupleEnd = tupleMid - 1;
                 } else {
-                	if (mode == FindTupleMode.EXCLUSIVE_ERROR_IF_EXISTS) {
-                		return encodeSlotFields(prefixMatch, ERROR_INDICATOR);
-                	} else {
-                		return encodeSlotFields(prefixMatch, tupleMid);
-                	}
+                    if (mode == FindTupleMode.EXCLUSIVE_ERROR_IF_EXISTS) {
+                        return encodeSlotFields(prefixMatch, ERROR_INDICATOR);
+                    } else {
+                        return encodeSlotFields(prefixMatch, tupleMid);
+                    }
                 }
             }
         }
 
-        // System.out.println("RECS: " + recBegin + " " + recMid + " " +
-        // recEnd);
-
         if (mode == FindTupleMode.EXACT)
             return encodeSlotFields(prefixMatch, ERROR_INDICATOR);
 
@@ -223,7 +215,7 @@
     public int insertSlot(int slot, int tupleOff) {
         int slotNum = decodeSecondSlotField(slot);
         if (slotNum == ERROR_INDICATOR) {
-        	System.out.println("WOW BIG PROBLEM!");
+            System.out.println("WOW BIG PROBLEM!");
         }
         if (slotNum == GREATEST_KEY_INDICATOR) {
             int slotOff = getTupleSlotEndOff() - slotSize;
@@ -255,50 +247,49 @@
         buf.putInt(getPrefixSlotOff(tupleIndex), slot);
     }
 
-	@Override
-	public int getGreatestKeyIndicator() {
-		return GREATEST_KEY_INDICATOR;
-	}
+    @Override
+    public int getGreatestKeyIndicator() {
+        return GREATEST_KEY_INDICATOR;
+    }
 
-	@Override
-	public int getErrorIndicator() {
-		return ERROR_INDICATOR;
-	}
+    @Override
+    public int getErrorIndicator() {
+        return ERROR_INDICATOR;
+    }
 
-	@Override
-	public void setFrame(ITreeIndexFrame frame) {
-		this.frame = (BTreeFieldPrefixNSMLeafFrame)frame;
+    @Override
+    public void setFrame(ITreeIndexFrame frame) {
+        this.frame = (BTreeFieldPrefixNSMLeafFrame) frame;
         this.buf = frame.getBuffer();
-	}
+    }
 
-	@Override
-	public int findTupleIndex(ITupleReference searchKey,
-			ITreeIndexTupleReference frameTuple, MultiComparator multiCmp,
-			FindTupleMode mode, FindTupleNoExactMatchPolicy matchPolicy) {
-		throw new UnsupportedOperationException("Not implemented.");
-	}
-	
-	@Override
-	public int getSlotStartOff() {
-		throw new UnsupportedOperationException("Not implemented.");
-	}
+    @Override
+    public int findTupleIndex(ITupleReference searchKey, ITreeIndexTupleReference frameTuple, MultiComparator multiCmp,
+            FindTupleMode mode, FindTupleNoExactMatchPolicy matchPolicy) {
+        throw new UnsupportedOperationException("Not implemented.");
+    }
 
-	@Override
-	public int getSlotEndOff() {
-		throw new UnsupportedOperationException("Not implemented.");
-	}
+    @Override
+    public int getSlotStartOff() {
+        throw new UnsupportedOperationException("Not implemented.");
+    }
 
-	@Override
-	public int getTupleOff(int slotOff) {
-		throw new UnsupportedOperationException("Not implemented.");
-	}
+    @Override
+    public int getSlotEndOff() {
+        throw new UnsupportedOperationException("Not implemented.");
+    }
 
-	@Override
-	public int getSlotOff(int tupleIndex) {
-		throw new UnsupportedOperationException("Not implemented.");
-	}
-	
-	public void setMultiComparator(MultiComparator cmp) {
-		this.cmp = cmp;
-	}
+    @Override
+    public int getTupleOff(int slotOff) {
+        throw new UnsupportedOperationException("Not implemented.");
+    }
+
+    @Override
+    public int getSlotOff(int tupleIndex) {
+        throw new UnsupportedOperationException("Not implemented.");
+    }
+
+    public void setMultiComparator(MultiComparator cmp) {
+        this.cmp = cmp;
+    }
 }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/FieldPrefixTupleReference.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/FieldPrefixTupleReference.java
index 9644a3e..b7174d4 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/FieldPrefixTupleReference.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/FieldPrefixTupleReference.java
@@ -2,18 +2,20 @@
 
 import java.nio.ByteBuffer;
 
+import edu.uci.ics.hyracks.storage.am.btree.api.IPrefixSlotManager;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeFieldPrefixNSMLeafFrame;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
 
 public class FieldPrefixTupleReference implements ITreeIndexTupleReference {
 
+    private final ITreeIndexTupleReference helperTuple;
+
     private BTreeFieldPrefixNSMLeafFrame frame;
     private int prefixTupleStartOff;
     private int suffixTupleStartOff;
     private int numPrefixFields;
     private int fieldCount;
-    private ITreeIndexTupleReference helperTuple;
 
     public FieldPrefixTupleReference(ITreeIndexTupleReference helperTuple) {
         this.helperTuple = helperTuple;
@@ -23,17 +25,17 @@
     @Override
     public void resetByTupleIndex(ITreeIndexFrame frame, int tupleIndex) {
         this.frame = (BTreeFieldPrefixNSMLeafFrame) frame;
-
-        int tupleSlotOff = this.frame.slotManager.getTupleSlotOff(tupleIndex);
+        IPrefixSlotManager slotManager = this.frame.getSlotManager();
+        int tupleSlotOff = slotManager.getTupleSlotOff(tupleIndex);
         int tupleSlot = this.frame.getBuffer().getInt(tupleSlotOff);
-        int prefixSlotNum = this.frame.slotManager.decodeFirstSlotField(tupleSlot);
-        suffixTupleStartOff = this.frame.slotManager.decodeSecondSlotField(tupleSlot);
+        int prefixSlotNum = slotManager.decodeFirstSlotField(tupleSlot);
+        suffixTupleStartOff = slotManager.decodeSecondSlotField(tupleSlot);
 
         if (prefixSlotNum != FieldPrefixSlotManager.TUPLE_UNCOMPRESSED) {
-            int prefixSlotOff = this.frame.slotManager.getPrefixSlotOff(prefixSlotNum);
+            int prefixSlotOff = slotManager.getPrefixSlotOff(prefixSlotNum);
             int prefixSlot = this.frame.getBuffer().getInt(prefixSlotOff);
-            numPrefixFields = this.frame.slotManager.decodeFirstSlotField(prefixSlot);
-            prefixTupleStartOff = this.frame.slotManager.decodeSecondSlotField(prefixSlot);
+            numPrefixFields = slotManager.decodeFirstSlotField(prefixSlot);
+            prefixTupleStartOff = slotManager.decodeSecondSlotField(prefixSlot);
         } else {
             numPrefixFields = 0;
             prefixTupleStartOff = -1;
@@ -96,20 +98,21 @@
     public int getTupleSize() {
         return getSuffixTupleSize() + getPrefixTupleSize();
     }
-    
+
     public int getSuffixTupleSize() {
         helperTuple.setFieldCount(numPrefixFields, fieldCount - numPrefixFields);
         helperTuple.resetByTupleOffset(frame.getBuffer(), suffixTupleStartOff);
         return helperTuple.getTupleSize();
     }
-    
+
     public int getPrefixTupleSize() {
-        if (numPrefixFields == 0) return 0;
+        if (numPrefixFields == 0)
+            return 0;
         helperTuple.setFieldCount(numPrefixFields);
         helperTuple.resetByTupleOffset(frame.getBuffer(), prefixTupleStartOff);
         return helperTuple.getTupleSize();
     }
-    
+
     public int getNumPrefixFields() {
         return numPrefixFields;
     }
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/UnconditionalTupleAcceptor.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/UnconditionalTupleAcceptor.java
new file mode 100644
index 0000000..9ae2523
--- /dev/null
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/UnconditionalTupleAcceptor.java
@@ -0,0 +1,14 @@
+package edu.uci.ics.hyracks.storage.am.btree.impls;
+
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.api.ITupleAcceptor;
+
+public enum UnconditionalTupleAcceptor implements ITupleAcceptor {
+    INSTANCE;
+
+    @Override
+    public boolean accept(ITupleReference tuple) {
+        return true;
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/util/BTreeUtils.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/util/BTreeUtils.java
index 57e3a96..de73459 100644
--- a/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/util/BTreeUtils.java
+++ b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/util/BTreeUtils.java
@@ -3,6 +3,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeException;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeFieldPrefixNSMLeafFrameFactory;
@@ -11,7 +12,6 @@
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMLeafFrameFactory;
 import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
 import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleWriterFactory;
@@ -20,22 +20,38 @@
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
 public class BTreeUtils {
-    public static BTree createBTree(IBufferCache bufferCache, IOperationCallback opCallback, ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories, BTreeLeafFrameType leafType) throws BTreeException {
+    public static BTree createBTree(IBufferCache bufferCache, IFileMapProvider fileMapProvider,
+            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories, BTreeLeafFrameType leafType,
+            FileReference file) throws BTreeException {
         TypeAwareTupleWriterFactory tupleWriterFactory = new TypeAwareTupleWriterFactory(typeTraits);
         ITreeIndexFrameFactory leafFrameFactory = getLeafFrameFactory(tupleWriterFactory, leafType);
         ITreeIndexFrameFactory interiorFrameFactory = new BTreeNSMInteriorFrameFactory(tupleWriterFactory);
         ITreeIndexMetaDataFrameFactory metaFrameFactory = new LIFOMetaDataFrameFactory();
         IFreePageManager freePageManager = new LinkedListFreePageManager(bufferCache, 0, metaFrameFactory);
-        BTree btree = new BTree(bufferCache, opCallback, typeTraits.length, cmpFactories, freePageManager, interiorFrameFactory, leafFrameFactory);
+        BTree btree = new BTree(bufferCache, fileMapProvider, freePageManager, interiorFrameFactory, leafFrameFactory,
+                cmpFactories, typeTraits.length, file);
         return btree;
     }
     
+    public static BTree createBTree(IBufferCache bufferCache, IFreePageManager freePageManager,
+            IFileMapProvider fileMapProvider, ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories,
+            BTreeLeafFrameType leafType, FileReference file) throws BTreeException {
+        TypeAwareTupleWriterFactory tupleWriterFactory = new TypeAwareTupleWriterFactory(typeTraits);
+        ITreeIndexFrameFactory leafFrameFactory = getLeafFrameFactory(tupleWriterFactory, leafType);
+        ITreeIndexFrameFactory interiorFrameFactory = new BTreeNSMInteriorFrameFactory(tupleWriterFactory);
+        BTree btree = new BTree(bufferCache, fileMapProvider, freePageManager, interiorFrameFactory, leafFrameFactory,
+                cmpFactories, typeTraits.length, file);
+        return btree;
+    }
+
     // Creates a new MultiComparator by constructing new IBinaryComparators.
-    public static MultiComparator getSearchMultiComparator(IBinaryComparatorFactory[] cmpFactories, ITupleReference searchKey) {
+    public static MultiComparator getSearchMultiComparator(IBinaryComparatorFactory[] cmpFactories,
+            ITupleReference searchKey) {
         if (searchKey == null || cmpFactories.length == searchKey.getFieldCount()) {
-            return MultiComparator.create(cmpFactories);
+            return MultiComparator.createIgnoreFieldLength(cmpFactories);
         }
         IBinaryComparator[] newCmps = new IBinaryComparator[searchKey.getFieldCount()];
         for (int i = 0; i < searchKey.getFieldCount(); i++) {
@@ -43,11 +59,12 @@
         }
         return new MultiComparator(newCmps);
     }
-    
-    public static ITreeIndexFrameFactory getLeafFrameFactory(ITreeIndexTupleWriterFactory tupleWriterFactory, BTreeLeafFrameType leafType) throws BTreeException {
-        switch(leafType) {
+
+    public static ITreeIndexFrameFactory getLeafFrameFactory(ITreeIndexTupleWriterFactory tupleWriterFactory,
+            BTreeLeafFrameType leafType) throws BTreeException {
+        switch (leafType) {
             case REGULAR_NSM: {
-                return new BTreeNSMLeafFrameFactory(tupleWriterFactory);                
+                return new BTreeNSMLeafFrameFactory(tupleWriterFactory);
             }
             case FIELD_PREFIX_COMPRESSED_NSM: {
                 return new BTreeFieldPrefixNSMLeafFrameFactory(tupleWriterFactory);
diff --git a/hyracks/hyracks-storage-am-common/pom.xml b/hyracks/hyracks-storage-am-common/pom.xml
index 48f91fa..0175467 100644
--- a/hyracks/hyracks-storage-am-common/pom.xml
+++ b/hyracks/hyracks-storage-am-common/pom.xml
@@ -1,14 +1,12 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-am-common</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-am-common</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -29,28 +27,28 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ICursorInitialState.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ICursorInitialState.java
index 60e8ba9..9fbaac2 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ICursorInitialState.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ICursorInitialState.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2010 by The Regents of the University of California
+ * Copyright 2009-2012 by The Regents of the University of California
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * you may obtain a copy of the License from
@@ -15,9 +15,19 @@
 
 package edu.uci.ics.hyracks.storage.am.common.api;
 
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
 
 public interface ICursorInitialState {
-	public ICachedPage getPage();
-	public void setPage(ICachedPage page);
+    public ICachedPage getPage();
+
+    public void setPage(ICachedPage page);
+
+    public ISearchOperationCallback getSearchOperationCallback();
+
+    public void setSearchOperationCallback(ISearchOperationCallback searchCallback);
+
+    public MultiComparator getOriginalKeyComparator();
+
+    public void setOriginialKeyComparator(MultiComparator originalCmp);
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IFreePageManagerFactory.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IFreePageManagerFactory.java
new file mode 100644
index 0000000..d26e65f
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IFreePageManagerFactory.java
@@ -0,0 +1,5 @@
+package edu.uci.ics.hyracks.storage.am.common.api;
+
+public interface IFreePageManagerFactory {
+    public IFreePageManager createFreePageManager();
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IInMemoryFreePageManager.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IInMemoryFreePageManager.java
new file mode 100644
index 0000000..67935a7
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IInMemoryFreePageManager.java
@@ -0,0 +1,9 @@
+package edu.uci.ics.hyracks.storage.am.common.api;
+
+public interface IInMemoryFreePageManager extends IFreePageManager {
+    public int getCapacity();
+
+    public void reset();
+
+    public boolean isFull();
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndex.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndex.java
new file mode 100644
index 0000000..1557c75
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndex.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.api;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+
+/**
+ * This interface describes the operations common to all indexes. Indexes
+ * implementing this interface can easily reuse existing index operators for
+ * dataflow. Users must perform operations on an via an {@link IIndexAccessor}.
+ * During dataflow, the lifecycle of IIndexes are handled through an {@link IIndexLifecycleManager}.
+ */
+public interface IIndex {
+
+    /**
+     * Initializes the persistent state of an index.
+     * An index cannot be created if it is in the activated state.
+     * Calling create on an index that is deactivated has the effect of clearing the index.
+     * 
+     * @throws HyracksDataException
+     *             if there is an error in the BufferCache while (un)pinning pages, (un)latching pages,
+     *             creating files, or deleting files
+     *             if the index is in the activated state
+     */
+    public void create() throws HyracksDataException;
+
+    /**
+     * Initializes the index's operational state. An index in the activated state may perform
+     * operations via an {@link IIndexAccessor}.
+     * 
+     * @throws HyracksDataException
+     *             if there is a problem in the BufferCache while (un)pinning pages, (un)latching pages,
+     *             creating files, or deleting files
+     */
+    public void activate() throws HyracksDataException;
+
+    /**
+     * Resets the operational state of the index. Calling clear has the same logical effect
+     * as calling deactivate(), destroy(), create(), then activate(), but not necessarily the
+     * same physical effect.
+     * 
+     * @throws HyracksDataException
+     *             if there is a problem in the BufferCache while (un)pinning pages, (un)latching pages,
+     *             creating files, or deleting files
+     *             if the index is not in the activated state
+     */
+    public void clear() throws HyracksDataException;
+
+    /**
+     * Deinitializes the index's operational state. An index in the deactivated state may not
+     * perform operations.
+     * 
+     * @throws HyracksDataException
+     *             if there is a problem in the BufferCache while (un)pinning pages, (un)latching pages,
+     *             creating files, or deleting files
+     */
+    public void deactivate() throws HyracksDataException;
+
+    /**
+     * Removes the persistent state of an index.
+     * An index cannot be destroyed if it is in the activated state.
+     * 
+     * @throws HyracksDataException
+     *             if there is an error in the BufferCache while (un)pinning pages, (un)latching pages,
+     *             creating files, or deleting files
+     *             if the index is already activated
+     */
+    public void destroy() throws HyracksDataException;
+
+    /**
+     * Creates an {@link IIndexAccessor} for performing operations on this index.
+     * An IIndexAccessor is not thread safe, but different IIndexAccessors can concurrently operate
+     * on the same {@link IIndex}.
+     * 
+     * @returns IIndexAccessor an accessor for this {@link IIndex}
+     * @param modificationCallback
+     *            the callback to be used for modification operations
+     * @param searchCallback
+     *            the callback to be used for search operations
+     */
+    public IIndexAccessor createAccessor(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback);
+
+    /**
+     * Ensures that all pages (and tuples) of the index are logically consistent.
+     * An assertion error is thrown if validation fails.
+     * 
+     * @throws HyracksDataException
+     *             if there is an error performing validation
+     */
+    public void validate() throws HyracksDataException;
+
+    /**
+     * @return the {@link IBufferCache} underlying this index.
+     */
+    public IBufferCache getBufferCache();
+
+    /**
+     * @return the size, in bytes, of pre-allocated memory space that this index was allotted.
+     */
+    public long getMemoryAllocationSize();
+
+    /**
+     * @param fillFactor
+     * @param verifyInput
+     * @throws IndexException
+     */
+    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
+            throws IndexException;
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexBulkLoadContext.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexBulkLoadContext.java
deleted file mode 100644
index a896d80..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexBulkLoadContext.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package edu.uci.ics.hyracks.storage.am.common.api;
-
-public interface IIndexBulkLoadContext {
-}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexBulkLoader.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexBulkLoader.java
new file mode 100644
index 0000000..86ed78f
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexBulkLoader.java
@@ -0,0 +1,28 @@
+package edu.uci.ics.hyracks.storage.am.common.api;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+
+public interface IIndexBulkLoader {
+    /**
+     * Append a tuple to the index in the context of a bulk load.
+     * 
+     * @param tuple
+     *            Tuple to be inserted.
+     * @throws IndexException
+     *             If the input stream is invalid for bulk loading (e.g., is not sorted).
+     * @throws HyracksDataException
+     *             If the BufferCache throws while un/pinning or un/latching.
+     */
+    public void add(ITupleReference tuple) throws IndexException, HyracksDataException;
+
+    /**
+     * Finalize the bulk loading operation in the given context.
+     * 
+     * @throws IndexException
+     * @throws HyracksDataException
+     *             If the BufferCache throws while un/pinning or un/latching.
+     */
+    public void end() throws IndexException, HyracksDataException;
+
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexCursor.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexCursor.java
index d29fd73..1c75da2 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexCursor.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexCursor.java
@@ -19,16 +19,16 @@
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 
 public interface IIndexCursor {
-    public void open(ICursorInitialState initialState,
-            ISearchPredicate searchPred) throws HyracksDataException;      
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws IndexException,
+            HyracksDataException;
 
-    public boolean hasNext() throws HyracksDataException;
+    public boolean hasNext() throws HyracksDataException, IndexException;
 
     public void next() throws HyracksDataException;
 
     public void close() throws HyracksDataException;
 
-    public void reset();
+    public void reset() throws HyracksDataException, IndexException;
 
     public ITupleReference getTuple();
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexDataflowHelper.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexDataflowHelper.java
new file mode 100644
index 0000000..39b4553
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexDataflowHelper.java
@@ -0,0 +1,23 @@
+package edu.uci.ics.hyracks.storage.am.common.api;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+
+public interface IIndexDataflowHelper {
+    public void create() throws HyracksDataException;
+
+    public void close() throws HyracksDataException;
+
+    public void open() throws HyracksDataException;
+
+    public void destroy() throws HyracksDataException;
+
+    public IIndex getIndexInstance();
+
+    public FileReference getFileReference();
+
+    public long getResourceID() throws HyracksDataException;
+    
+    public IHyracksTaskContext getTaskContext();
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexLifecycleManager.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexLifecycleManager.java
new file mode 100644
index 0000000..c4f43b9
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexLifecycleManager.java
@@ -0,0 +1,19 @@
+package edu.uci.ics.hyracks.storage.am.common.api;
+
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public interface IIndexLifecycleManager {
+    public IIndex getIndex(long resourceID);
+
+    public void register(long resourceID, IIndex index) throws HyracksDataException;
+
+    public void unregister(long resourceID) throws HyracksDataException;
+
+    public void open(long resourceID) throws HyracksDataException;
+
+    public void close(long resourceID);
+
+    public List<IIndex> getOpenIndexes();
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexLifecycleManagerProvider.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexLifecycleManagerProvider.java
new file mode 100644
index 0000000..7ae4a48
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexLifecycleManagerProvider.java
@@ -0,0 +1,9 @@
+package edu.uci.ics.hyracks.storage.am.common.api;
+
+import java.io.Serializable;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+
+public interface IIndexLifecycleManagerProvider extends Serializable {
+    public IIndexLifecycleManager getLifecycleManager(IHyracksTaskContext ctx);
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexOpContext.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexOpContext.java
deleted file mode 100644
index 7153f78..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexOpContext.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package edu.uci.ics.hyracks.storage.am.common.api;
-
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOp;
-
-public interface IIndexOpContext {
-	void reset();
-	void reset(IndexOp newOp);
-}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexOperationContext.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexOperationContext.java
new file mode 100644
index 0000000..c5bf83e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndexOperationContext.java
@@ -0,0 +1,11 @@
+package edu.uci.ics.hyracks.storage.am.common.api;
+
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+
+public interface IIndexOperationContext {
+    void setOperation(IndexOperation newOp);
+    
+    IndexOperation getOperation();
+
+    void reset();
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IModificationOperationCallback.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IModificationOperationCallback.java
new file mode 100644
index 0000000..0b68ab0
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IModificationOperationCallback.java
@@ -0,0 +1,36 @@
+package edu.uci.ics.hyracks.storage.am.common.api;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+
+/**
+ * This operation callback allows for arbitrary actions to be taken while traversing 
+ * an index structure. The {@link IModificationOperationCallback} will be called on 
+ * all modifying operations (e.g. insert, update, delete...) for all indexes.
+ * 
+ * @author zheilbron
+ */
+public interface IModificationOperationCallback {
+
+    /**
+     * This method is called on a tuple that is about to traverse an index's structure 
+     * (i.e. before any pages are pinned or latched). 
+     *
+     * The format of the tuple is the format that would be stored in the index itself.
+     * 
+     * @param tuple the tuple that is about to be operated on
+     */
+    public void before(ITupleReference tuple) throws HyracksDataException;
+
+    /**
+     * This method is called on a tuple when a tuple with a matching key is found for the 
+     * current operation. It is possible that tuple is null, in which case no tuple with a 
+     * matching key was found.
+     * 
+     * When found is called, the leaf page where the tuple resides will be pinned and latched, 
+     * so blocking operations should be avoided.
+     * 
+     * @param tuple a tuple with a matching key, otherwise null if none exists
+     */
+    public void found(ITupleReference before, ITupleReference after) throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IModificationOperationCallbackFactory.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IModificationOperationCallbackFactory.java
new file mode 100644
index 0000000..65c9c8a
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IModificationOperationCallbackFactory.java
@@ -0,0 +1,11 @@
+package edu.uci.ics.hyracks.storage.am.common.api;
+
+import java.io.Serializable;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public interface IModificationOperationCallbackFactory extends Serializable {
+    public IModificationOperationCallback createModificationOperationCallback(long resourceId, Object resource, IHyracksTaskContext ctx)
+            throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IOperationCallback.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IOperationCallback.java
deleted file mode 100644
index 9e66b43..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IOperationCallback.java
+++ /dev/null
@@ -1,9 +0,0 @@
-package edu.uci.ics.hyracks.storage.am.common.api;
-
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-
-public interface IOperationCallback {
-    public void pre(ITupleReference tuple);
-
-    public void post(ITupleReference tuple);
-}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IOperationCallbackProvider.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IOperationCallbackProvider.java
deleted file mode 100644
index 974ef1a..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IOperationCallbackProvider.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package edu.uci.ics.hyracks.storage.am.common.api;
-
-import java.io.Serializable;
-
-public interface IOperationCallbackProvider extends Serializable {
-    public IOperationCallback getOperationCallback();
-}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ISearchOperationCallback.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ISearchOperationCallback.java
new file mode 100644
index 0000000..b62bbcb
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ISearchOperationCallback.java
@@ -0,0 +1,45 @@
+package edu.uci.ics.hyracks.storage.am.common.api;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+
+/**
+ * This operation callback allows for arbitrary actions to be taken while traversing 
+ * an index structure. The {@link ISearchOperationCallback} will be called on 
+ * all search operations for ordered indexes only.
+ * 
+ * @author zheilbron
+ */
+public interface ISearchOperationCallback {
+
+    /**
+     * During an index search operation, this method will be called on tuples as they are 
+     * passed by with a search cursor. This call will be invoked while a leaf page is latched 
+     * and pinned. If the call returns false, then the page will be unlatched and unpinned and 
+     * {@link #reconcile(ITupleReference)} will be called with the tuple that was not proceeded 
+     * on.
+     * 
+     * @param tuple the tuple that is being passed over by the search cursor
+     * @return true to proceed otherwise false to unlatch and unpin, leading to reconciliation
+     */
+    public boolean proceed(ITupleReference tuple) throws HyracksDataException;
+
+    /**
+     * This method is only called on a tuple that was not 'proceeded' on 
+     * (see {@link #proceed(ITupleReference)}). This method allows an opportunity to reconcile 
+     * by performing any necessary actions before resuming the search (e.g. a try-lock may have 
+     * failed in the proceed call, and now in reconcile we should take a full (blocking) lock).
+     * 
+     * @param tuple the tuple that failed to proceed
+     */
+    public void reconcile(ITupleReference tuple) throws HyracksDataException;
+
+    /**
+     * This method is only called on a tuple that was reconciled on, but not found after 
+     * retraversing. This method allows an opportunity to cancel some action that was taken in 
+     * {@link #reconcile(ITupleReference))}.
+     * 
+     * @param tuple the tuple that was previously reconciled
+     */
+    public void cancel(ITupleReference tuple) throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ISearchOperationCallbackFactory.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ISearchOperationCallbackFactory.java
new file mode 100644
index 0000000..6389b8d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ISearchOperationCallbackFactory.java
@@ -0,0 +1,11 @@
+package edu.uci.ics.hyracks.storage.am.common.api;
+
+import java.io.Serializable;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public interface ISearchOperationCallbackFactory extends Serializable {
+    public ISearchOperationCallback createSearchOperationCallback(long resourceId, IHyracksTaskContext ctx)
+            throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ISlotManager.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ISlotManager.java
index 2619493..3e5e018 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ISlotManager.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ISlotManager.java
@@ -21,27 +21,26 @@
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 
 public interface ISlotManager {
-	public int findTupleIndex(ITupleReference searchKey,
-			ITreeIndexTupleReference frameTuple, MultiComparator multiCmp,
-			FindTupleMode mode, FindTupleNoExactMatchPolicy matchPolicy);
+    public int findTupleIndex(ITupleReference searchKey, ITreeIndexTupleReference frameTuple, MultiComparator multiCmp,
+            FindTupleMode mode, FindTupleNoExactMatchPolicy matchPolicy);
 
-	public int getGreatestKeyIndicator();
-	
-	public int getErrorIndicator();
+    public int getGreatestKeyIndicator();
 
-	public void setFrame(ITreeIndexFrame frame);
-	
-	public int insertSlot(int tupleIndex, int tupleOff);
+    public int getErrorIndicator();
 
-	public int getSlotStartOff();
+    public void setFrame(ITreeIndexFrame frame);
 
-	public int getSlotEndOff();
+    public int getTupleOff(int slotOff);
 
-	public int getTupleOff(int slotOff);
+    public int insertSlot(int tupleIndex, int tupleOff);
 
-	public void setSlot(int slotOff, int value);
+    public int getSlotStartOff();
 
-	public int getSlotOff(int tupleIndex);
+    public int getSlotEndOff();
 
-	public int getSlotSize();
+    public int getSlotOff(int tupleIndex);
+
+    public int getSlotSize();
+
+    public void setSlot(int slotOff, int value);
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndex.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndex.java
index 52626cf..2313c2e 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndex.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndex.java
@@ -16,7 +16,6 @@
 package edu.uci.ics.hyracks.storage.am.common.api;
 
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
 
 /**
  * Interface describing the operations of tree-based index structures. Indexes
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndexFrame.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndexFrame.java
index c33a8d8..612af25 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndexFrame.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndexFrame.java
@@ -20,20 +20,21 @@
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.storage.am.common.frames.FrameOpSpaceStatus;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
 
 public interface ITreeIndexFrame {
 
-	public void initBuffer(byte level);
-	
+    public void initBuffer(byte level);
+
     public FrameOpSpaceStatus hasSpaceInsert(ITupleReference tuple);
-	
-	public void insert(ITupleReference tuple, int tupleIndex);    
-    
-	public FrameOpSpaceStatus hasSpaceUpdate(ITupleReference newTuple, int oldTupleIndex);
-	
-	public void update(ITupleReference newTuple, int oldTupleIndex, boolean inPlace);    
-    
+
+    public void insert(ITupleReference tuple, int tupleIndex);
+
+    public FrameOpSpaceStatus hasSpaceUpdate(ITupleReference newTuple, int oldTupleIndex);
+
+    public void update(ITupleReference newTuple, int oldTupleIndex, boolean inPlace);
+
     public void delete(ITupleReference tuple, int tupleIndex);
 
     // returns true if slots were modified, false otherwise
@@ -57,11 +58,11 @@
     public ICachedPage getPage();
 
     public ByteBuffer getBuffer();
-    
+
     // for debugging
     public String printHeader();
 
-    public void split(ITreeIndexFrame rightFrame, ITupleReference tuple, ISplitKey splitKey) throws TreeIndexException;
+    public void split(ITreeIndexFrame rightFrame, ITupleReference tuple, ISplitKey splitKey);
 
     public ISlotManager getSlotManager();
 
@@ -87,6 +88,9 @@
     public ITreeIndexTupleWriter getTupleWriter();
 
     public int getPageHeaderSize();
-    
+
     public ITreeIndexTupleReference createTupleReference();
+
+    public void setMultiComparator(MultiComparator cmp);
+
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndexMetaDataFrame.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndexMetaDataFrame.java
index 9e95970..b48ded4 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndexMetaDataFrame.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndexMetaDataFrame.java
@@ -47,4 +47,9 @@
 	
 	// Set special validity flag.
 	public void setValid(boolean isValid);
+	
+	// Special placeholder for LSN information. Used for transactional LSM indexes.
+	public long getLSN();
+	
+	public void setLSN(long lsn);
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndexTupleWriter.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndexTupleWriter.java
index 30e8f39..43991f1 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndexTupleWriter.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/ITreeIndexTupleWriter.java
@@ -21,19 +21,22 @@
 
 public interface ITreeIndexTupleWriter {
     public int writeTuple(ITupleReference tuple, ByteBuffer targetBuf, int targetOff);
-    
+
     public int writeTuple(ITupleReference tuple, byte[] targetBuf, int targetOff);
 
     public int bytesRequired(ITupleReference tuple);
 
-    public int writeTupleFields(ITupleReference tuple, int startField, int numFields, byte[] targetBuf,
-            int targetOff);
+    public int writeTupleFields(ITupleReference tuple, int startField, int numFields, byte[] targetBuf, int targetOff);
 
     public int bytesRequired(ITupleReference tuple, int startField, int numFields);
 
     // return a tuplereference instance that can read the tuple written by this
-    // writer
-    // the main idea is that the format of the written tuple may not be the same
+    // writer the main idea is that the format of the written tuple may not be the same
     // as the format written by this writer
     public ITreeIndexTupleReference createTupleReference();
+
+    // This method is only used by the BTree leaf frame split method since tuples
+    // in the LSM-BTree can be either matter or anti-matter tuples and we want
+    // to calculate the size of all tuples in the frame.
+    public int getCopySpaceRequired(ITupleReference tuple);
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IndexType.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IndexType.java
deleted file mode 100644
index 6f83e0b..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IndexType.java
+++ /dev/null
@@ -1,5 +0,0 @@
-package edu.uci.ics.hyracks.storage.am.common.api;
-
-public enum IndexType {
-	BTREE, RTREE, INVERTED
-}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/UnsortedInputException.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/UnsortedInputException.java
new file mode 100644
index 0000000..e3304c9
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/UnsortedInputException.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.api;
+
+/**
+ * Thrown when trying to bulk load an index with an unsorted input stream. 
+ */
+public class UnsortedInputException extends IndexException {
+	private static final long serialVersionUID = 1L;
+	
+	public UnsortedInputException(Exception e) {
+		super(e);
+	}
+	
+	public UnsortedInputException(String message) {
+        super(message);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractIndexOperatorDescriptor.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractIndexOperatorDescriptor.java
new file mode 100644
index 0000000..c26bbfa
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractIndexOperatorDescriptor.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.dataflow;
+
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
+import edu.uci.ics.hyracks.dataflow.std.base.AbstractSingleActivityOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
+import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceFactoryProvider;
+
+public abstract class AbstractIndexOperatorDescriptor extends AbstractSingleActivityOperatorDescriptor implements
+        IIndexOperatorDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    protected final IFileSplitProvider fileSplitProvider;
+    protected final IStorageManagerInterface storageManager;
+    protected final IIndexLifecycleManagerProvider lifecycleManagerProvider;
+    protected final IIndexDataflowHelperFactory dataflowHelperFactory;
+    protected final ITupleFilterFactory tupleFilterFactory;
+    protected final boolean retainInput;
+    protected final ISearchOperationCallbackFactory searchOpCallbackFactory;
+    protected final IModificationOperationCallbackFactory modificationOpCallbackFactory;
+    protected final ILocalResourceFactoryProvider localResourceFactoryProvider;
+
+    public AbstractIndexOperatorDescriptor(IOperatorDescriptorRegistry spec, int inputArity, int outputArity,
+            RecordDescriptor recDesc, IStorageManagerInterface storageManager,
+            IIndexLifecycleManagerProvider lifecycleManagerProvider, IFileSplitProvider fileSplitProvider,
+            IIndexDataflowHelperFactory dataflowHelperFactory, ITupleFilterFactory tupleFilterFactory,
+            boolean retainInput, ILocalResourceFactoryProvider localResourceFactoryProvider,
+            ISearchOperationCallbackFactory searchOpCallbackFactory,
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
+        super(spec, inputArity, outputArity);
+        this.fileSplitProvider = fileSplitProvider;
+        this.storageManager = storageManager;
+        this.lifecycleManagerProvider = lifecycleManagerProvider;
+        this.dataflowHelperFactory = dataflowHelperFactory;
+        this.retainInput = retainInput;
+        this.tupleFilterFactory = tupleFilterFactory;
+        this.localResourceFactoryProvider = localResourceFactoryProvider;
+        this.searchOpCallbackFactory = searchOpCallbackFactory;
+        this.modificationOpCallbackFactory = modificationOpCallbackFactory;
+        if (outputArity > 0) {
+            recordDescriptors[0] = recDesc;
+        }
+    }
+
+    @Override
+    public IFileSplitProvider getFileSplitProvider() {
+        return fileSplitProvider;
+    }
+
+    @Override
+    public IStorageManagerInterface getStorageManager() {
+        return storageManager;
+    }
+
+    @Override
+    public IIndexLifecycleManagerProvider getLifecycleManagerProvider() {
+        return lifecycleManagerProvider;
+    }
+
+    @Override
+    public RecordDescriptor getRecordDescriptor() {
+        return recordDescriptors[0];
+    }
+
+    @Override
+    public IIndexDataflowHelperFactory getIndexDataflowHelperFactory() {
+        return dataflowHelperFactory;
+    }
+
+    @Override
+    public boolean getRetainInput() {
+        return retainInput;
+    }
+
+    @Override
+    public ISearchOperationCallbackFactory getSearchOpCallbackFactory() {
+        return searchOpCallbackFactory;
+    }
+    
+    @Override
+    public IModificationOperationCallbackFactory getModificationOpCallbackFactory() {
+        return modificationOpCallbackFactory;
+    }
+
+    @Override
+    public ITupleFilterFactory getTupleFilterFactory() {
+        return tupleFilterFactory;
+    }
+    
+    @Override
+    public ILocalResourceFactoryProvider getLocalResourceFactoryProvider() {
+        return localResourceFactoryProvider;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractTreeIndexOperatorDescriptor.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractTreeIndexOperatorDescriptor.java
index 9f0fbc9..ffcf7a1 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractTreeIndexOperatorDescriptor.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractTreeIndexOperatorDescriptor.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2010 by The Regents of the University of California
+ * Copyright 2009-2012 by The Regents of the University of California
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * you may obtain a copy of the License from
@@ -19,104 +19,57 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
-import edu.uci.ics.hyracks.dataflow.std.base.AbstractSingleActivityOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceFactoryProvider;
 
-public abstract class AbstractTreeIndexOperatorDescriptor extends
-		AbstractSingleActivityOperatorDescriptor implements
-		ITreeIndexOperatorDescriptor {
+public abstract class AbstractTreeIndexOperatorDescriptor extends AbstractIndexOperatorDescriptor {
 
-	private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 1L;
 
-	protected final IFileSplitProvider fileSplitProvider;
+    protected final ITypeTraits[] typeTraits;
+    protected final IBinaryComparatorFactory[] comparatorFactories;
+    protected final int[] bloomFilterKeyFields;
 
-	protected final IBinaryComparatorFactory[] comparatorFactories;
+    public AbstractTreeIndexOperatorDescriptor(IOperatorDescriptorRegistry spec, int inputArity, int outputArity,
+            RecordDescriptor recDesc, IStorageManagerInterface storageManager,
+            IIndexLifecycleManagerProvider lifecycleManagerProvider, IFileSplitProvider fileSplitProvider,
+            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] comparatorFactories, int[] bloomFilterKeyFields,
+            IIndexDataflowHelperFactory dataflowHelperFactory, ITupleFilterFactory tupleFilterFactory,
+            boolean retainInput, ILocalResourceFactoryProvider localResourceFactoryProvider,
+            ISearchOperationCallbackFactory searchOpCallbackFactory,
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
+        super(spec, inputArity, outputArity, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider,
+                dataflowHelperFactory, tupleFilterFactory, retainInput, localResourceFactoryProvider,
+                searchOpCallbackFactory, modificationOpCallbackFactory);
+        this.typeTraits = typeTraits;
+        this.comparatorFactories = comparatorFactories;
+        this.bloomFilterKeyFields = bloomFilterKeyFields;
+    }
 
-	protected final IStorageManagerInterface storageManager;
-	protected final IIndexRegistryProvider<IIndex> indexRegistryProvider;
+    public IBinaryComparatorFactory[] getTreeIndexComparatorFactories() {
+        return comparatorFactories;
+    }
 
-	protected final ITypeTraits[] typeTraits;
-	protected final IIndexDataflowHelperFactory dataflowHelperFactory;
-	protected final ITupleFilterFactory tupleFilterFactory;
-	
-	protected final boolean retainInput;
-    protected final IOperationCallbackProvider opCallbackProvider;
+    public ITypeTraits[] getTreeIndexTypeTraits() {
+        return typeTraits;
+    }
 
-	public AbstractTreeIndexOperatorDescriptor(IOperatorDescriptorRegistry spec,
-			int inputArity, int outputArity, RecordDescriptor recDesc,
-			IStorageManagerInterface storageManager,
-			IIndexRegistryProvider<IIndex> indexRegistryProvider,
-			IFileSplitProvider fileSplitProvider,
-			ITypeTraits[] typeTraits,
-			IBinaryComparatorFactory[] comparatorFactories,
-			IIndexDataflowHelperFactory dataflowHelperFactory,
-			ITupleFilterFactory tupleFilterFactory,
-			boolean retainInput, IOperationCallbackProvider opCallbackProvider) {
-		super(spec, inputArity, outputArity);
-		this.fileSplitProvider = fileSplitProvider;
-		this.storageManager = storageManager;
-		this.indexRegistryProvider = indexRegistryProvider;
-		this.typeTraits = typeTraits;
-		this.comparatorFactories = comparatorFactories;
-		this.dataflowHelperFactory = dataflowHelperFactory;
-		this.retainInput = retainInput;
-		this.tupleFilterFactory = tupleFilterFactory;
-        this.opCallbackProvider = opCallbackProvider;
-		if (outputArity > 0) {
-			recordDescriptors[0] = recDesc;
-		}
-	}
+    public int[] getTreeIndexBloomFilterKeyFields() {
+        return bloomFilterKeyFields;
+    }
 
-	@Override
-	public IFileSplitProvider getFileSplitProvider() {
-		return fileSplitProvider;
-	}
+    @Override
+    public boolean getRetainInput() {
+        return retainInput;
+    }
 
-	@Override
-	public IBinaryComparatorFactory[] getTreeIndexComparatorFactories() {
-		return comparatorFactories;
-	}
-
-	@Override
-	public ITypeTraits[] getTreeIndexTypeTraits() {
-		return typeTraits;
-	}
-
-	@Override
-	public IStorageManagerInterface getStorageManager() {
-		return storageManager;
-	}
-
-	@Override
-	public IIndexRegistryProvider<IIndex> getIndexRegistryProvider() {
-		return indexRegistryProvider;
-	}
-
-	@Override
-	public RecordDescriptor getRecordDescriptor() {
-		return recordDescriptors[0];
-	}
-
-	@Override
-	public IIndexDataflowHelperFactory getIndexDataflowHelperFactory() {
-		return dataflowHelperFactory;
-	}
-	
-	@Override
-	public boolean getRetainInput() {
-		return retainInput;
-	}
-	
-	@Override
-	public IOperationCallbackProvider getOpCallbackProvider() {
-	    return opCallbackProvider;
-	}
-	
-	@Override
-	public ITupleFilterFactory getTupleFilterFactory() {
-		return tupleFilterFactory;
-	}
+    @Override
+    public ITupleFilterFactory getTupleFilterFactory() {
+        return tupleFilterFactory;
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndex.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndex.java
deleted file mode 100644
index 64cbd58..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndex.java
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.common.dataflow;
-
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoadContext;
-import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
-import edu.uci.ics.hyracks.storage.am.common.api.IndexType;
-import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
-
-/**
- * Interface describing the operations common to all index structures. Indexes
- * implementing this interface can easily reuse existing index operators for
- * dataflow. Users must perform operations on an IIndex via an IIndexAccessor.
- */
-public interface IIndex {
-    /**
-     * Initializes the persistent state of an index, e.g., the root page, and
-     * metadata pages.
-     * 
-     * @param indexFileId
-     *            The file id to use for this index.
-     * @throws HyracksDataException
-     *             If the BufferCache throws while un/pinning or un/latching.
-     */
-    public void create(int indexFileId) throws HyracksDataException;
-
-    /**
-     * Opens the index backed by the given file id.
-     * 
-     * @param indexFileId
-     *            The file id backing this index.
-     */
-    public void open(int indexFileId) throws HyracksDataException;
-
-    /**
-     * Closes the index.
-     */
-    public void close() throws HyracksDataException;
-
-    /**
-     * Creates an index accessor for performing operations on this index.
-     * (insert/delete/update/search/diskorderscan). An IIndexAccessor is not
-     * thread safe, but different IIndexAccessors can concurrently operate
-     * on the same IIndex
-     * 
-     * @returns IIndexAccessor An accessor for this tree.
-     */
-    public IIndexAccessor createAccessor();
-
-    /**
-     * Prepares the index for bulk loading, returning a bulk load context. The
-     * index may require to be empty for bulk loading.
-     * 
-     * @param fillFactor
-     *            Desired fill factor in [0, 1.0].
-     * @throws HyracksDataException
-     *             If the BufferCache throws while un/pinning or un/latching.
-     * @throws IndexException
-     *             For example, if the index was already loaded and only
-     *             supports a single load.
-     * @returns A new context for bulk loading, required for appending tuples.
-     */
-    public IIndexBulkLoadContext beginBulkLoad(float fillFactor) throws IndexException, HyracksDataException;
-
-    /**
-     * Append a tuple to the index in the context of a bulk load.
-     * 
-     * @param tuple
-     *            Tuple to be inserted.
-     * @param ictx
-     *            Existing bulk load context.
-     * @throws HyracksDataException
-     *             If the BufferCache throws while un/pinning or un/latching.
-     */
-    public void bulkLoadAddTuple(ITupleReference tuple, IIndexBulkLoadContext ictx) throws HyracksDataException;
-
-    /**
-     * Finalize the bulk loading operation in the given context.
-     * 
-     * @param ictx
-     *            Existing bulk load context to be finalized.
-     * @throws HyracksDataException
-     *             If the BufferCache throws while un/pinning or un/latching.
-     */
-    public void endBulkLoad(IIndexBulkLoadContext ictx) throws HyracksDataException;
-
-    /**
-     * @return BufferCache underlying this index.
-     */
-    public IBufferCache getBufferCache();
-
-    /**
-     * @return An enum of the concrete type of this index.
-     */
-    public IndexType getIndexType();
-}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexDataflowHelperFactory.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexDataflowHelperFactory.java
index ddca470..71760c9 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexDataflowHelperFactory.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexDataflowHelperFactory.java
@@ -18,8 +18,9 @@
 import java.io.Serializable;
 
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexDataflowHelper;
 
 public interface IIndexDataflowHelperFactory extends Serializable {
-    public IndexDataflowHelper createIndexDataflowHelper(IIndexOperatorDescriptor opDesc,
+    public IIndexDataflowHelper createIndexDataflowHelper(IIndexOperatorDescriptor opDesc,
             final IHyracksTaskContext ctx, int partition);
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexOperatorDescriptor.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexOperatorDescriptor.java
index e37d374..6193414 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexOperatorDescriptor.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexOperatorDescriptor.java
@@ -18,21 +18,31 @@
 import edu.uci.ics.hyracks.api.dataflow.IActivity;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceFactoryProvider;
 
 public interface IIndexOperatorDescriptor extends IActivity {
     public IFileSplitProvider getFileSplitProvider();
 
     public IStorageManagerInterface getStorageManager();
 
-    public IIndexRegistryProvider<IIndex> getIndexRegistryProvider();    
-    
+    public IIndexLifecycleManagerProvider getLifecycleManagerProvider();
+
     public RecordDescriptor getRecordDescriptor();
-    
+
     public IIndexDataflowHelperFactory getIndexDataflowHelperFactory();
-    
+
     public boolean getRetainInput();
+
+    public ISearchOperationCallbackFactory getSearchOpCallbackFactory();
     
-    public IOperationCallbackProvider getOpCallbackProvider();
+    public IModificationOperationCallbackFactory getModificationOpCallbackFactory();
+    
+    public ITupleFilterFactory getTupleFilterFactory();
+    
+    public ILocalResourceFactoryProvider getLocalResourceFactoryProvider();
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexRegistryProvider.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexRegistryProvider.java
deleted file mode 100644
index ed20de0..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexRegistryProvider.java
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.common.dataflow;
-
-import java.io.Serializable;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-
-public interface IIndexRegistryProvider<IndexType> extends Serializable {
-	public IndexRegistry<IndexType> getRegistry(IHyracksTaskContext ctx);
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexBulkLoadOperatorNodePushable.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexBulkLoadOperatorNodePushable.java
new file mode 100644
index 0000000..1b6271d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexBulkLoadOperatorNodePushable.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.common.dataflow;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
+import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputSinkOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingFrameTupleReference;
+
+public class IndexBulkLoadOperatorNodePushable extends AbstractUnaryInputSinkOperatorNodePushable {
+    private final IIndexOperatorDescriptor opDesc;
+    private final IHyracksTaskContext ctx;
+    private final float fillFactor;
+    private final boolean verifyInput;
+    private final long numElementsHint;
+    private final IIndexDataflowHelper indexHelper;
+    private FrameTupleAccessor accessor;
+    private IIndex index;
+    private IIndexBulkLoader bulkLoader;
+    private IRecordDescriptorProvider recDescProvider;
+    private PermutingFrameTupleReference tuple = new PermutingFrameTupleReference();
+
+    public IndexBulkLoadOperatorNodePushable(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition,
+            int[] fieldPermutation, float fillFactor, boolean verifyInput, long numElementsHint,
+            IRecordDescriptorProvider recordDescProvider) {
+        this.opDesc = opDesc;
+        this.ctx = ctx;
+        this.indexHelper = opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(opDesc, ctx, partition);
+        this.fillFactor = fillFactor;
+        this.verifyInput = verifyInput;
+        this.numElementsHint = numElementsHint;
+        this.recDescProvider = recordDescProvider;
+        tuple.setFieldPermutation(fieldPermutation);
+    }
+
+    @Override
+    public void open() throws HyracksDataException {
+        RecordDescriptor recDesc = recDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
+        accessor = new FrameTupleAccessor(ctx.getFrameSize(), recDesc);
+        indexHelper.open();
+        index = indexHelper.getIndexInstance();
+        try {
+            bulkLoader = index.createBulkLoader(fillFactor, verifyInput, numElementsHint);
+        } catch (Exception e) {
+            indexHelper.close();
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+        accessor.reset(buffer);
+        int tupleCount = accessor.getTupleCount();
+        for (int i = 0; i < tupleCount; i++) {
+            tuple.reset(accessor, i);
+            try {
+                bulkLoader.add(tuple);
+            } catch (IndexException e) {
+                throw new HyracksDataException(e);
+            }
+        }
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        try {
+            bulkLoader.end();
+        } catch (Exception e) {
+            throw new HyracksDataException(e);
+        } finally {
+            indexHelper.close();
+        }
+    }
+
+    @Override
+    public void fail() throws HyracksDataException {
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexCreateOperatorNodePushable.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexCreateOperatorNodePushable.java
new file mode 100644
index 0000000..f965f01
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexCreateOperatorNodePushable.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.dataflow;
+
+import edu.uci.ics.hyracks.api.comm.IFrameWriter;
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.std.base.AbstractOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexDataflowHelper;
+
+public class IndexCreateOperatorNodePushable extends AbstractOperatorNodePushable {
+    private final IIndexDataflowHelper indexHelper;
+
+    public IndexCreateOperatorNodePushable(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition) {
+        this.indexHelper = opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(opDesc, ctx, partition);
+    }
+
+    @Override
+    public void deinitialize() throws HyracksDataException {
+    }
+
+    @Override
+    public int getInputArity() {
+        return 0;
+    }
+
+    @Override
+    public IFrameWriter getInputFrameWriter(int index) {
+        return null;
+    }
+
+    @Override
+    public void initialize() throws HyracksDataException {
+        indexHelper.create();
+    }
+
+    @Override
+    public void setOutputFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc) {
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexDataflowHelper.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexDataflowHelper.java
index fa95ce4..e46efff 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexDataflowHelper.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexDataflowHelper.java
@@ -15,105 +15,132 @@
 
 package edu.uci.ics.hyracks.storage.am.common.dataflow;
 
+import java.io.IOException;
+
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
-import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceFactory;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceRepository;
+import edu.uci.ics.hyracks.storage.common.file.LocalResource;
+import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactory;
 
-public abstract class IndexDataflowHelper {
-    protected IIndex index;
-    protected int indexFileId = -1;
+public abstract class IndexDataflowHelper implements IIndexDataflowHelper {
 
-    protected final int partition;
     protected final IIndexOperatorDescriptor opDesc;
     protected final IHyracksTaskContext ctx;
+    protected final IIndexLifecycleManager lcManager;
+    protected final ILocalResourceRepository localResourceRepository;
+    protected final ResourceIdFactory resourceIdFactory;
+    protected final FileReference file;
+    protected final int partition;
+
+    protected IIndex index;
 
     public IndexDataflowHelper(IIndexOperatorDescriptor opDesc, final IHyracksTaskContext ctx, int partition) {
         this.opDesc = opDesc;
         this.ctx = ctx;
+        this.lcManager = opDesc.getLifecycleManagerProvider().getLifecycleManager(ctx);
+        this.localResourceRepository = opDesc.getStorageManager().getLocalResourceRepository(ctx);
+        this.resourceIdFactory = opDesc.getStorageManager().getResourceIdFactory(ctx);
         this.partition = partition;
+        this.file = opDesc.getFileSplitProvider().getFileSplits()[partition].getLocalFile();
     }
 
-    public void init(boolean forceCreate) throws HyracksDataException {
-        IBufferCache bufferCache = opDesc.getStorageManager().getBufferCache(ctx);
-        IFileMapProvider fileMapProvider = opDesc.getStorageManager().getFileMapProvider(ctx);
-        IndexRegistry<IIndex> indexRegistry = opDesc.getIndexRegistryProvider().getRegistry(ctx);
-        FileReference fileRef = getFilereference();
-        int fileId = -1;
-        boolean fileIsMapped = false;
-        synchronized (fileMapProvider) {
-            fileIsMapped = fileMapProvider.isMapped(fileRef);
-            if (!fileIsMapped) {
-                bufferCache.createFile(fileRef);
-            }
-            fileId = fileMapProvider.lookupFileId(fileRef);
-            try {
-                // Also creates the file if it doesn't exist yet.
-                bufferCache.openFile(fileId);
-            } catch (HyracksDataException e) {
-                // Revert state of buffer cache since file failed to open.
-                if (!fileIsMapped) {
-                    bufferCache.deleteFile(fileId, false);
-                }
-                throw e;
-            }
-        }
-        // Only set indexFileId member after openFile() succeeds.
-        indexFileId = fileId;
-        // Create new index instance and register it.
-        synchronized (indexRegistry) {
-            // Check if the index has already been registered.
-            boolean register = false;
-            index = indexRegistry.get(indexFileId);
-            if (index == null) {
-                index = createIndexInstance();
-                register = true;
-            }
-            if (forceCreate) {
-                index.create(indexFileId);
-            }
-            index.open(indexFileId);
-            if (register) {
-                indexRegistry.register(indexFileId, index);
-            }
-        }
-    }
+    protected abstract IIndex createIndexInstance() throws HyracksDataException;
 
-    public abstract IIndex createIndexInstance() throws HyracksDataException;
-
-    public FileReference getFilereference() {
-        IFileSplitProvider fileSplitProvider = opDesc.getFileSplitProvider();
-        return fileSplitProvider.getFileSplits()[partition].getLocalFile();
-    }
-
-    public void deinit() throws HyracksDataException {
-        if (indexFileId != -1) {
-            IBufferCache bufferCache = opDesc.getStorageManager().getBufferCache(ctx);
-            bufferCache.closeFile(indexFileId);
-            indexFileId = -1;
-        }
-    }
-
-    public IIndex getIndex() {
+    public IIndex getIndexInstance() {
         return index;
     }
 
-    public IHyracksTaskContext getHyracksTaskContext() {
+    public void create() throws HyracksDataException {
+        synchronized (lcManager) {
+            long resourceID = getResourceID();
+            index = lcManager.getIndex(resourceID);
+            if (index != null) {
+                lcManager.unregister(resourceID);
+            } else {
+                index = createIndexInstance();
+            }
+
+            // The previous resource ID needs to be removed since calling IIndex.create() may possibly destroy 
+            // any physical artifact that the LocalResourceRepository is managing (e.g. a file containing the resource ID). 
+            // Once the index has been created, a new resource ID can be generated.
+            if (resourceID != -1) {
+                localResourceRepository.deleteResourceByName(file.getFile().getPath());
+            }
+            index.create();
+            try {
+                //TODO Create LocalResource through LocalResourceFactory interface
+                resourceID = resourceIdFactory.createId();
+                ILocalResourceFactory localResourceFactory = opDesc.getLocalResourceFactoryProvider()
+                        .getLocalResourceFactory();
+                localResourceRepository.insert(localResourceFactory.createLocalResource(resourceID, file.getFile()
+                        .getPath(), partition));
+            } catch (IOException e) {
+                throw new HyracksDataException(e);
+            }
+            lcManager.register(resourceID, index);
+        }
+    }
+
+    public void open() throws HyracksDataException {
+        synchronized (lcManager) {
+            long resourceID = getResourceID();
+
+            if (resourceID == -1) {
+                throw new HyracksDataException("Index does not have a valid resource ID. Has it been created yet?");
+            }
+
+            index = lcManager.getIndex(resourceID);
+            if (index == null) {
+                index = createIndexInstance();
+                lcManager.register(resourceID, index);
+            }
+            lcManager.open(resourceID);
+        }
+    }
+
+    public void close() throws HyracksDataException {
+        synchronized (lcManager) {
+            lcManager.close(getResourceID());
+        }
+    }
+
+    public void destroy() throws HyracksDataException {
+        synchronized (lcManager) {
+            long resourceID = getResourceID();
+            index = lcManager.getIndex(resourceID);
+            if (index != null) {
+                lcManager.unregister(resourceID);
+            } else {
+                index = createIndexInstance();
+            }
+
+            if (resourceID != -1) {
+                localResourceRepository.deleteResourceByName(file.getFile().getPath());
+            }
+            index.destroy();
+        }
+    }
+
+    public FileReference getFileReference() {
+        return file;
+    }
+
+    public long getResourceID() throws HyracksDataException {
+        LocalResource localResource = localResourceRepository.getResourceByName(file.getFile().getPath());
+        if (localResource == null) {
+            return -1;
+        } else {
+            return localResource.getResourceId();
+        }
+    }
+
+    public IHyracksTaskContext getTaskContext() {
         return ctx;
     }
-
-    public IIndexOperatorDescriptor getOperatorDescriptor() {
-        return opDesc;
-    }
-
-    public int getIndexFileId() {
-        return indexFileId;
-    }
-
-    public IOperationCallbackProvider getOpCallbackProvider() {
-        return opDesc.getOpCallbackProvider();
-    }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexDropOperatorDescriptor.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexDropOperatorDescriptor.java
new file mode 100644
index 0000000..6f890d7
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexDropOperatorDescriptor.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
+import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
+
+public class IndexDropOperatorDescriptor extends AbstractTreeIndexOperatorDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    public IndexDropOperatorDescriptor(IOperatorDescriptorRegistry spec, IStorageManagerInterface storageManager,
+            IIndexLifecycleManagerProvider lifecycleManagerProvider, IFileSplitProvider fileSplitProvider,
+            IIndexDataflowHelperFactory dataflowHelperFactory) {
+        // TODO: providing the type traits below is a hack to allow:
+        // 1) Type traits not to be specified when creating the drop operator
+        // 2) The LSMRTreeDataflowHelper to get acceptable type traits
+        // This should eventually not be *hacked*, but I don't know the proper fix yet. -zheilbron
+        super(spec, 0, 0, null, storageManager, lifecycleManagerProvider, fileSplitProvider, new ITypeTraits[] {
+                IntegerPointable.TYPE_TRAITS, IntegerPointable.TYPE_TRAITS }, new IBinaryComparatorFactory[] { null }, null,
+                dataflowHelperFactory, null, false, NoOpLocalResourceFactoryProvider.INSTANCE,
+                NoOpOperationCallbackFactory.INSTANCE, NoOpOperationCallbackFactory.INSTANCE);
+    }
+
+    @Override
+    public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
+            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
+        return new IndexDropOperatorNodePushable(this, ctx, partition);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexDropOperatorNodePushable.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexDropOperatorNodePushable.java
new file mode 100644
index 0000000..73bed72
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexDropOperatorNodePushable.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.dataflow;
+
+import edu.uci.ics.hyracks.api.comm.IFrameWriter;
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.std.base.AbstractOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexDataflowHelper;
+
+public class IndexDropOperatorNodePushable extends AbstractOperatorNodePushable {
+    private final IIndexDataflowHelper indexHelper;
+
+    public IndexDropOperatorNodePushable(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
+            int partition) {
+        this.indexHelper = opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(opDesc, ctx, partition);
+    }
+
+    @Override
+    public void deinitialize() throws HyracksDataException {
+    }
+
+    @Override
+    public int getInputArity() {
+        return 0;
+    }
+
+    @Override
+    public IFrameWriter getInputFrameWriter(int index) {
+        return null;
+    }
+
+    @Override
+    public void initialize() throws HyracksDataException {
+        indexHelper.destroy();
+    }
+
+    @Override
+    public void setOutputFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc) {
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexInsertUpdateDeleteOperatorNodePushable.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexInsertUpdateDeleteOperatorNodePushable.java
new file mode 100644
index 0000000..059f42a
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexInsertUpdateDeleteOperatorNodePushable.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.common.dataflow;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
+import edu.uci.ics.hyracks.dataflow.common.comm.util.FrameUtils;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference;
+import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputUnaryOutputOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilter;
+import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingFrameTupleReference;
+
+public class IndexInsertUpdateDeleteOperatorNodePushable extends AbstractUnaryInputUnaryOutputOperatorNodePushable {
+    protected final IIndexOperatorDescriptor opDesc;
+    protected final IHyracksTaskContext ctx;
+    protected final IIndexDataflowHelper indexHelper;
+    protected final IRecordDescriptorProvider recordDescProvider;
+    protected final IndexOperation op;
+    protected final PermutingFrameTupleReference tuple = new PermutingFrameTupleReference();
+    protected FrameTupleAccessor accessor;
+    protected FrameTupleReference frameTuple;
+    protected ByteBuffer writeBuffer;
+    protected IIndexAccessor indexAccessor;
+    protected ITupleFilter tupleFilter;
+    protected IModificationOperationCallback modCallback;
+
+    public IndexInsertUpdateDeleteOperatorNodePushable(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
+            int partition, int[] fieldPermutation, IRecordDescriptorProvider recordDescProvider, IndexOperation op) {
+        this.opDesc = opDesc;
+        this.ctx = ctx;
+        this.indexHelper = opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(opDesc, ctx, partition);
+        this.recordDescProvider = recordDescProvider;
+        this.op = op;
+        tuple.setFieldPermutation(fieldPermutation);
+    }
+
+    @Override
+    public void open() throws HyracksDataException {
+        RecordDescriptor inputRecDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
+        accessor = new FrameTupleAccessor(ctx.getFrameSize(), inputRecDesc);
+        writeBuffer = ctx.allocateFrame();
+        writer.open();
+        indexHelper.open();
+        IIndex index = indexHelper.getIndexInstance();
+        try {
+            modCallback = opDesc.getModificationOpCallbackFactory().createModificationOperationCallback(
+                    indexHelper.getResourceID(), index, ctx);
+            indexAccessor = index.createAccessor(modCallback, NoOpOperationCallback.INSTANCE);
+            ITupleFilterFactory tupleFilterFactory = opDesc.getTupleFilterFactory();
+            if (tupleFilterFactory != null) {
+                tupleFilter = tupleFilterFactory.createTupleFilter(indexHelper.getTaskContext());
+                frameTuple = new FrameTupleReference();
+            }
+        } catch (Exception e) {
+            indexHelper.close();
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+        accessor.reset(buffer);
+        int tupleCount = accessor.getTupleCount();
+        for (int i = 0; i < tupleCount; i++) {
+            try {
+                if (tupleFilter != null) {
+                    frameTuple.reset(accessor, i);
+                    if (!tupleFilter.accept(frameTuple)) {
+                        continue;
+                    }
+                }
+                tuple.reset(accessor, i);
+
+                switch (op) {
+                    case INSERT: {
+                        indexAccessor.insert(tuple);
+                        break;
+                    }
+                    case UPDATE: {
+                        indexAccessor.update(tuple);
+                        break;
+                    }
+                    case UPSERT: {
+                        indexAccessor.upsert(tuple);
+                        break;
+                    }
+                    case DELETE: {
+                        indexAccessor.delete(tuple);
+                        break;
+                    }
+                    default: {
+                        throw new HyracksDataException("Unsupported operation " + op
+                                + " in tree index InsertUpdateDelete operator");
+                    }
+                }
+            } catch (HyracksDataException e) {
+                throw e;
+            } catch (Exception e) {
+                throw new HyracksDataException(e);
+            }
+        }
+        // Pass a copy of the frame to next op.
+        System.arraycopy(buffer.array(), 0, writeBuffer.array(), 0, buffer.capacity());
+        FrameUtils.flushFrame(writeBuffer, writer);
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        try {
+            writer.close();
+        } finally {
+            indexHelper.close();
+        }
+    }
+
+    @Override
+    public void fail() throws HyracksDataException {
+        writer.fail();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexLifecycleManager.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexLifecycleManager.java
new file mode 100644
index 0000000..197aecc
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexLifecycleManager.java
@@ -0,0 +1,181 @@
+package edu.uci.ics.hyracks.storage.am.common.dataflow;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
+
+public class IndexLifecycleManager implements IIndexLifecycleManager {
+    private static final long DEFAULT_MEMORY_BUDGET = 1024 * 1024 * 100; // 100 megabytes
+
+    private final Map<Long, IndexInfo> indexInfos;
+    private final long memoryBudget;
+
+    private long memoryUsed;
+
+    public IndexLifecycleManager() {
+        this(DEFAULT_MEMORY_BUDGET);
+    }
+
+    public IndexLifecycleManager(long memoryBudget) {
+        this.indexInfos = new HashMap<Long, IndexInfo>();
+        this.memoryBudget = memoryBudget;
+        this.memoryUsed = 0;
+    }
+
+    private boolean evictCandidateIndex() throws HyracksDataException {
+        // Why min()? As a heuristic for eviction, we will take an open index (an index consuming memory) 
+        // that is not being used (refcount == 0) and has been least recently used. The sort order defined 
+        // for IndexInfo maintains this. See IndexInfo.compareTo().
+        IndexInfo info = Collections.min(indexInfos.values());
+        if (info.referenceCount != 0 || !info.isOpen) {
+            return false;
+        }
+
+        info.index.deactivate();
+        memoryUsed -= info.index.getMemoryAllocationSize();
+        info.isOpen = false;
+
+        return true;
+    }
+
+    @Override
+    public IIndex getIndex(long resourceID) {
+        IndexInfo info = indexInfos.get(resourceID);
+        return info == null ? null : info.index;
+    }
+
+    @Override
+    public void register(long resourceID, IIndex index) throws HyracksDataException {
+        if (indexInfos.containsKey(resourceID)) {
+            throw new HyracksDataException("Index with resource ID " + resourceID + " already exists.");
+        }
+
+        indexInfos.put(resourceID, new IndexInfo(index));
+    }
+
+    @Override
+    public void unregister(long resourceID) throws HyracksDataException {
+        IndexInfo info = indexInfos.remove(resourceID);
+        if (info == null) {
+            throw new HyracksDataException("Index with resource ID " + resourceID + " does not exist.");
+        }
+
+        if (info.referenceCount != 0) {
+            indexInfos.put(resourceID, info);
+            throw new HyracksDataException("Cannot remove index while it is open.");
+        }
+
+        if (info.isOpen) {
+            info.index.deactivate();
+            memoryUsed -= info.index.getMemoryAllocationSize();
+        }
+    }
+
+    @Override
+    public void open(long resourceID) throws HyracksDataException {
+        IndexInfo info = indexInfos.get(resourceID);
+        if (info == null) {
+            throw new HyracksDataException("Failed to open index with resource ID " + resourceID
+                    + " since it does not exist.");
+        }
+
+        long inMemorySize = info.index.getMemoryAllocationSize();
+        while (memoryUsed + inMemorySize > memoryBudget) {
+            if (!evictCandidateIndex()) {
+                throw new HyracksDataException("Cannot activate index since memory budget would be exceeded.");
+            }
+        }
+
+        if (!info.isOpen) {
+            info.index.activate();
+            info.isOpen = true;
+            memoryUsed += inMemorySize;
+        }
+        info.touch();
+    }
+
+    @Override
+    public void close(long resourceID) {
+        indexInfos.get(resourceID).untouch();
+    }
+
+    private class IndexInfo implements Comparable<IndexInfo> {
+        private final IIndex index;
+        private int referenceCount;
+        private long lastAccess;
+        private boolean isOpen;
+
+        public IndexInfo(IIndex index) {
+            this.index = index;
+            this.lastAccess = -1;
+            this.referenceCount = 0;
+            this.isOpen = false;
+        }
+
+        public void touch() {
+            lastAccess = System.currentTimeMillis();
+            referenceCount++;
+        }
+
+        public void untouch() {
+            lastAccess = System.currentTimeMillis();
+            referenceCount--;
+        }
+
+        @Override
+        public int compareTo(IndexInfo i) {
+            // sort by (isOpen, referenceCount, lastAccess) ascending, where true < false
+            //
+            // Example sort order:
+            // -------------------
+            // (F, 0, 70)       <-- largest
+            // (F, 0, 60)
+            // (T, 10, 80)
+            // (T, 10, 70)
+            // (T, 9, 90)
+            // (T, 0, 100)      <-- smallest
+            if (isOpen && !i.isOpen) {
+                return -1;
+            } else if (!isOpen && i.isOpen) {
+                return 1;
+            } else {
+                if (referenceCount < i.referenceCount) {
+                    return -1;
+                } else if (referenceCount > i.referenceCount) {
+                    return 1;
+                } else {
+                    if (lastAccess < i.lastAccess) {
+                        return -1;
+                    } else if (lastAccess > i.lastAccess) {
+                        return 1;
+                    } else {
+                        return 0;
+                    }
+                }
+            }
+
+        }
+
+        public String toString() {
+            return "{index: " + index + ", isOpen: " + isOpen + ", refCount: " + referenceCount + ", lastAccess: "
+                    + lastAccess + "}";
+        }
+    }
+
+    @Override
+    public List<IIndex> getOpenIndexes() {
+        List<IIndex> openIndexes = new ArrayList<IIndex>();
+        for (IndexInfo i : indexInfos.values()) {
+            if (i.isOpen) {
+                openIndexes.add(i.index);
+            }
+        }
+        return openIndexes;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexSearchOperatorNodePushable.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexSearchOperatorNodePushable.java
new file mode 100644
index 0000000..98beea2
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexSearchOperatorNodePushable.java
@@ -0,0 +1,165 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.common.dataflow;
+
+import java.io.DataOutput;
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
+import edu.uci.ics.hyracks.dataflow.common.comm.util.FrameUtils;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputUnaryOutputOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+
+public abstract class IndexSearchOperatorNodePushable extends AbstractUnaryInputUnaryOutputOperatorNodePushable {
+    protected final IIndexOperatorDescriptor opDesc;
+    protected final IHyracksTaskContext ctx;
+    protected final IIndexDataflowHelper indexHelper;
+    protected FrameTupleAccessor accessor;
+
+    protected ByteBuffer writeBuffer;
+    protected FrameTupleAppender appender;
+    protected ArrayTupleBuilder tb;
+    protected DataOutput dos;
+
+    protected IIndex index;
+    protected ISearchPredicate searchPred;
+    protected IIndexCursor cursor;
+    protected IIndexAccessor indexAccessor;
+
+    protected final RecordDescriptor inputRecDesc;
+    protected final boolean retainInput;
+    protected FrameTupleReference frameTuple;
+
+    public IndexSearchOperatorNodePushable(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition,
+            IRecordDescriptorProvider recordDescProvider) {
+        this.opDesc = opDesc;
+        this.ctx = ctx;
+        this.indexHelper = opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(opDesc, ctx, partition);
+        this.retainInput = opDesc.getRetainInput();
+        this.inputRecDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
+    }
+
+    protected abstract ISearchPredicate createSearchPredicate();
+
+    protected abstract void resetSearchPredicate(int tupleIndex);
+
+    protected IIndexCursor createCursor() {
+        return indexAccessor.createSearchCursor();
+    }
+
+    @Override
+    public void open() throws HyracksDataException {
+        accessor = new FrameTupleAccessor(ctx.getFrameSize(), inputRecDesc);
+        writer.open();
+        indexHelper.open();
+        index = indexHelper.getIndexInstance();
+        try {
+            searchPred = createSearchPredicate();
+            writeBuffer = ctx.allocateFrame();
+            tb = new ArrayTupleBuilder(recordDesc.getFieldCount());
+            dos = tb.getDataOutput();
+            appender = new FrameTupleAppender(ctx.getFrameSize());
+            appender.reset(writeBuffer, true);
+            ISearchOperationCallback searchCallback = opDesc.getSearchOpCallbackFactory()
+                    .createSearchOperationCallback(indexHelper.getResourceID(), ctx);
+            indexAccessor = index.createAccessor(NoOpOperationCallback.INSTANCE, searchCallback);
+            cursor = createCursor();
+            if (retainInput) {
+                frameTuple = new FrameTupleReference();
+            }
+        } catch (Exception e) {
+            indexHelper.close();
+            throw new HyracksDataException(e);
+        }
+    }
+
+    protected void writeSearchResults(int tupleIndex) throws Exception {
+        while (cursor.hasNext()) {
+            tb.reset();
+            cursor.next();
+            if (retainInput) {
+                frameTuple.reset(accessor, tupleIndex);
+                for (int i = 0; i < frameTuple.getFieldCount(); i++) {
+                    dos.write(frameTuple.getFieldData(i), frameTuple.getFieldStart(i), frameTuple.getFieldLength(i));
+                    tb.addFieldEndOffset();
+                }
+            }
+            ITupleReference tuple = cursor.getTuple();
+            for (int i = 0; i < tuple.getFieldCount(); i++) {
+                dos.write(tuple.getFieldData(i), tuple.getFieldStart(i), tuple.getFieldLength(i));
+                tb.addFieldEndOffset();
+            }
+            if (!appender.append(tb.getFieldEndOffsets(), tb.getByteArray(), 0, tb.getSize())) {
+                FrameUtils.flushFrame(writeBuffer, writer);
+                appender.reset(writeBuffer, true);
+                if (!appender.append(tb.getFieldEndOffsets(), tb.getByteArray(), 0, tb.getSize())) {
+                    throw new IllegalStateException();
+                }
+            }
+        }
+    }
+
+    @Override
+    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+        accessor.reset(buffer);
+        int tupleCount = accessor.getTupleCount();
+        try {
+            for (int i = 0; i < tupleCount; i++) {
+                resetSearchPredicate(i);
+                cursor.reset();
+                indexAccessor.search(cursor, searchPred);
+                writeSearchResults(i);
+            }
+        } catch (Exception e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        try {
+            if (appender.getTupleCount() > 0) {
+                FrameUtils.flushFrame(writeBuffer, writer);
+            }
+            writer.close();
+            try {
+                cursor.close();
+            } catch (Exception e) {
+                throw new HyracksDataException(e);
+            }
+        } finally {
+            indexHelper.close();
+        }
+    }
+
+    @Override
+    public void fail() throws HyracksDataException {
+        writer.fail();
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/PermutingFrameTupleReference.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/PermutingFrameTupleReference.java
deleted file mode 100644
index 0b296f0..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/PermutingFrameTupleReference.java
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.common.dataflow;
-
-import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
-
-public class PermutingFrameTupleReference implements IFrameTupleReference {
-	private IFrameTupleAccessor fta;
-	private int tIndex;
-	private int[] fieldPermutation;
-
-	public void setFieldPermutation(int[] fieldPermutation) {
-		this.fieldPermutation = fieldPermutation;
-	}
-
-	public void reset(IFrameTupleAccessor fta, int tIndex) {
-		this.fta = fta;
-		this.tIndex = tIndex;
-	}
-
-	@Override
-	public IFrameTupleAccessor getFrameTupleAccessor() {
-		return fta;
-	}
-
-	@Override
-	public int getTupleIndex() {
-		return tIndex;
-	}
-
-	@Override
-	public int getFieldCount() {
-		return fieldPermutation.length;
-	}
-
-	@Override
-	public byte[] getFieldData(int fIdx) {
-		return fta.getBuffer().array();
-	}
-
-	@Override
-	public int getFieldStart(int fIdx) {
-		return fta.getTupleStartOffset(tIndex) + fta.getFieldSlotsLength()
-				+ fta.getFieldStartOffset(tIndex, fieldPermutation[fIdx]);
-	}
-
-	@Override
-	public int getFieldLength(int fIdx) {
-		return fta.getFieldLength(tIndex, fieldPermutation[fIdx]);
-	}
-}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexBulkLoadOperatorDescriptor.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexBulkLoadOperatorDescriptor.java
index 0020089..f7f57e6 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexBulkLoadOperatorDescriptor.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexBulkLoadOperatorDescriptor.java
@@ -22,8 +22,11 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
 
 public class TreeIndexBulkLoadOperatorDescriptor extends AbstractTreeIndexOperatorDescriptor {
 
@@ -31,22 +34,30 @@
 
     private final int[] fieldPermutation;
     private final float fillFactor;
+    private final boolean verifyInput;
+    private final long numElementsHint;
 
-    public TreeIndexBulkLoadOperatorDescriptor(IOperatorDescriptorRegistry spec, IStorageManagerInterface storageManager,
-            IIndexRegistryProvider<IIndex> indexRegistryProvider, IFileSplitProvider fileSplitProvider,
-            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] comparatorFactories, int[] fieldPermutation,
-            float fillFactor, IIndexDataflowHelperFactory dataflowHelperFactory,
-            IOperationCallbackProvider opCallbackProvider) {
-        super(spec, 1, 0, null, storageManager, indexRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, dataflowHelperFactory, null, false, opCallbackProvider);
+    public TreeIndexBulkLoadOperatorDescriptor(IOperatorDescriptorRegistry spec,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lifecycleManagerProvider,
+            IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] comparatorFactories, int[] bloomFilterKeyFields, int[] fieldPermutation,
+            float fillFactor, boolean verifyInput, long numElementsHint,
+            IIndexDataflowHelperFactory dataflowHelperFactory,
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
+        super(spec, 1, 0, null, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, bloomFilterKeyFields, dataflowHelperFactory, null, false,
+                NoOpLocalResourceFactoryProvider.INSTANCE, NoOpOperationCallbackFactory.INSTANCE,
+                modificationOpCallbackFactory);
         this.fieldPermutation = fieldPermutation;
         this.fillFactor = fillFactor;
+        this.verifyInput = verifyInput;
+        this.numElementsHint = numElementsHint;
     }
 
     @Override
     public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
             IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
-        return new TreeIndexBulkLoadOperatorNodePushable(this, ctx, partition, fieldPermutation,
-                fillFactor, recordDescProvider);
+        return new IndexBulkLoadOperatorNodePushable(this, ctx, partition, fieldPermutation, fillFactor, verifyInput,
+                numElementsHint, recordDescProvider);
     }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexBulkLoadOperatorNodePushable.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexBulkLoadOperatorNodePushable.java
deleted file mode 100644
index a2d78a4..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexBulkLoadOperatorNodePushable.java
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.storage.am.common.dataflow;
-
-import java.nio.ByteBuffer;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
-import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputSinkOperatorNodePushable;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoadContext;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
-
-public class TreeIndexBulkLoadOperatorNodePushable extends AbstractUnaryInputSinkOperatorNodePushable {
-    private float fillFactor;
-    private final TreeIndexDataflowHelper treeIndexHelper;
-    private FrameTupleAccessor accessor;
-    private IIndexBulkLoadContext bulkLoadCtx;
-    private ITreeIndex treeIndex;
-
-    private IRecordDescriptorProvider recordDescProvider;
-
-    private PermutingFrameTupleReference tuple = new PermutingFrameTupleReference();
-
-    public TreeIndexBulkLoadOperatorNodePushable(AbstractTreeIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
-            int partition, int[] fieldPermutation, float fillFactor, IRecordDescriptorProvider recordDescProvider) {
-        treeIndexHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
-                opDesc, ctx, partition);
-        this.fillFactor = fillFactor;
-        this.recordDescProvider = recordDescProvider;
-        tuple.setFieldPermutation(fieldPermutation);
-    }
-
-    @Override
-    public void open() throws HyracksDataException {
-        AbstractTreeIndexOperatorDescriptor opDesc = (AbstractTreeIndexOperatorDescriptor) treeIndexHelper
-                .getOperatorDescriptor();
-        RecordDescriptor recDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
-        accessor = new FrameTupleAccessor(treeIndexHelper.getHyracksTaskContext().getFrameSize(), recDesc);
-        try {
-            treeIndexHelper.init(false);
-            treeIndex = (ITreeIndex) treeIndexHelper.getIndex();
-            treeIndex.open(treeIndexHelper.getIndexFileId());
-            bulkLoadCtx = treeIndex.beginBulkLoad(fillFactor);
-        } catch (Exception e) {
-            // cleanup in case of failure
-            treeIndexHelper.deinit();
-            throw new HyracksDataException(e);
-        }
-    }
-
-    @Override
-    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
-        accessor.reset(buffer);
-        int tupleCount = accessor.getTupleCount();
-        for (int i = 0; i < tupleCount; i++) {
-            tuple.reset(accessor, i);
-            treeIndex.bulkLoadAddTuple(tuple, bulkLoadCtx);
-        }
-    }
-
-    @Override
-    public void close() throws HyracksDataException {
-        try {
-            treeIndex.endBulkLoad(bulkLoadCtx);
-        } catch (Exception e) {
-            throw new HyracksDataException(e);
-        } finally {
-            treeIndexHelper.deinit();
-        }
-    }
-
-    @Override
-    public void fail() throws HyracksDataException {
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexCreateOperatorDescriptor.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexCreateOperatorDescriptor.java
index 075a6a4..8b7e81d 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexCreateOperatorDescriptor.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexCreateOperatorDescriptor.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2010 by The Regents of the University of California
+ * Copyright 2009-2012 by The Regents of the University of California
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * you may obtain a copy of the License from
@@ -22,24 +22,30 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceFactoryProvider;
 
 public class TreeIndexCreateOperatorDescriptor extends AbstractTreeIndexOperatorDescriptor {
 
     private static final long serialVersionUID = 1L;
 
     public TreeIndexCreateOperatorDescriptor(IOperatorDescriptorRegistry spec, IStorageManagerInterface storageManager,
-            IIndexRegistryProvider<IIndex> indexRegistryProvider, IFileSplitProvider fileSplitProvider,
-            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] comparatorFactories,
-            IIndexDataflowHelperFactory dataflowHelperFactory, IOperationCallbackProvider opCallbackProvider) {
-        super(spec, 0, 0, null, storageManager, indexRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, dataflowHelperFactory, null, false, opCallbackProvider);
+            IIndexLifecycleManagerProvider lifecycleManagerProvider, IFileSplitProvider fileSplitProvider,
+            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] comparatorFactories, int[] bloomFilterKeyFields,
+            IIndexDataflowHelperFactory dataflowHelperFactory,
+            ILocalResourceFactoryProvider localResourceFactoryProvider,
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
+        super(spec, 0, 0, null, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, bloomFilterKeyFields, dataflowHelperFactory, null, false,
+                localResourceFactoryProvider, NoOpOperationCallbackFactory.INSTANCE, modificationOpCallbackFactory);
     }
 
     @Override
     public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
             IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
-        return new TreeIndexCreateOperatorNodePushable(this, ctx, partition);
+        return new IndexCreateOperatorNodePushable(this, ctx, partition);
     }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexCreateOperatorNodePushable.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexCreateOperatorNodePushable.java
deleted file mode 100644
index 21348a0..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexCreateOperatorNodePushable.java
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.common.dataflow;
-
-import edu.uci.ics.hyracks.api.comm.IFrameWriter;
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.std.base.AbstractOperatorNodePushable;
-
-public class TreeIndexCreateOperatorNodePushable extends AbstractOperatorNodePushable {
-    protected final TreeIndexDataflowHelper treeIndexHelper;
-
-    public TreeIndexCreateOperatorNodePushable(AbstractTreeIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
-            int partition) {
-        treeIndexHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
-                opDesc, ctx, partition);
-    }
-
-    @Override
-    public void deinitialize() throws HyracksDataException {
-    }
-
-    @Override
-    public int getInputArity() {
-        return 0;
-    }
-
-    @Override
-    public IFrameWriter getInputFrameWriter(int index) {
-        return null;
-    }
-
-    @Override
-    public void initialize() throws HyracksDataException {
-        try {
-        	treeIndexHelper.init(true);
-        } finally {
-        	treeIndexHelper.deinit();
-        }
-    }
-
-    @Override
-    public void setOutputFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc) {
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDataflowHelper.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDataflowHelper.java
index 10d1077..711dfe0 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDataflowHelper.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDataflowHelper.java
@@ -17,22 +17,17 @@
 
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
-import edu.uci.ics.hyracks.storage.am.common.impls.TreeDiskOrderScanCursor;
+import edu.uci.ics.hyracks.storage.am.common.impls.TreeIndexDiskOrderScanCursor;
 
 public abstract class TreeIndexDataflowHelper extends IndexDataflowHelper {
-    protected ITreeIndexOperatorDescriptor treeOpDesc;
 
     public TreeIndexDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition) {
         super(opDesc, ctx, partition);
-        this.treeOpDesc = (ITreeIndexOperatorDescriptor) opDesc;
     }
 
-    public abstract ITreeIndex createIndexInstance() throws HyracksDataException;
-
     public ITreeIndexCursor createDiskOrderScanCursor(ITreeIndexFrame leafFrame) throws HyracksDataException {
-        return new TreeDiskOrderScanCursor(leafFrame);
+        return new TreeIndexDiskOrderScanCursor(leafFrame);
     }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorDescriptor.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorDescriptor.java
index 324485e..a8644e4 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorDescriptor.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorDescriptor.java
@@ -22,19 +22,23 @@
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
 
 public class TreeIndexDiskOrderScanOperatorDescriptor extends AbstractTreeIndexOperatorDescriptor {
 
     private static final long serialVersionUID = 1L;
 
     public TreeIndexDiskOrderScanOperatorDescriptor(IOperatorDescriptorRegistry spec, RecordDescriptor recDesc,
-            IStorageManagerInterface storageManager, IIndexRegistryProvider<IIndex> indexRegistryProvider,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lifecycleManagerProvider,
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
-            IIndexDataflowHelperFactory dataflowHelperFactory, IOperationCallbackProvider opCallbackProvider) {
-        super(spec, 0, 1, recDesc, storageManager, indexRegistryProvider, fileSplitProvider, typeTraits, null,
-                dataflowHelperFactory, null, false, opCallbackProvider);
+            IIndexDataflowHelperFactory dataflowHelperFactory, ISearchOperationCallbackFactory searchOpCallbackProvider) {
+        super(spec, 0, 1, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits, null, null,
+                dataflowHelperFactory, null, false, NoOpLocalResourceFactoryProvider.INSTANCE,
+                searchOpCallbackProvider, NoOpOperationCallbackFactory.INSTANCE);
     }
 
     @Override
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorNodePushable.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorNodePushable.java
index d02a570..a861af7 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorNodePushable.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorNodePushable.java
@@ -24,36 +24,44 @@
 import edu.uci.ics.hyracks.dataflow.common.comm.util.FrameUtils;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryOutputSourceOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
 
 public class TreeIndexDiskOrderScanOperatorNodePushable extends AbstractUnaryOutputSourceOperatorNodePushable {
+    private final AbstractTreeIndexOperatorDescriptor opDesc;
+    private final IHyracksTaskContext ctx;
     private final TreeIndexDataflowHelper treeIndexHelper;
     private ITreeIndex treeIndex;
 
     public TreeIndexDiskOrderScanOperatorNodePushable(AbstractTreeIndexOperatorDescriptor opDesc,
             IHyracksTaskContext ctx, int partition) {
-        treeIndexHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
-                opDesc, ctx, partition);
+        this.opDesc = opDesc;
+        this.ctx = ctx;
+        this.treeIndexHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory()
+                .createIndexDataflowHelper(opDesc, ctx, partition);
     }
 
     @Override
     public void initialize() throws HyracksDataException {
+        treeIndexHelper.open();
+        treeIndex = (ITreeIndex) treeIndexHelper.getIndexInstance();
         try {
-            treeIndexHelper.init(false);
-            treeIndex = (ITreeIndex) treeIndexHelper.getIndex();
             ITreeIndexFrame cursorFrame = treeIndex.getLeafFrameFactory().createFrame();
             ITreeIndexCursor cursor = treeIndexHelper.createDiskOrderScanCursor(cursorFrame);
-            ITreeIndexAccessor indexAccessor = (ITreeIndexAccessor) treeIndex.createAccessor();
+            ISearchOperationCallback searchCallback = opDesc.getSearchOpCallbackFactory().createSearchOperationCallback(
+                    treeIndexHelper.getResourceID(), ctx);
+            ITreeIndexAccessor indexAccessor = (ITreeIndexAccessor) treeIndex.createAccessor(
+                    NoOpOperationCallback.INSTANCE, searchCallback);
             writer.open();
             try {
                 indexAccessor.diskOrderScan(cursor);
                 int fieldCount = treeIndex.getFieldCount();
-                ByteBuffer frame = treeIndexHelper.getHyracksTaskContext().allocateFrame();
-                FrameTupleAppender appender = new FrameTupleAppender(treeIndexHelper.getHyracksTaskContext()
-                        .getFrameSize());
+                ByteBuffer frame = ctx.allocateFrame();
+                FrameTupleAppender appender = new FrameTupleAppender(ctx.getFrameSize());
                 appender.reset(frame, true);
                 ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
                 DataOutput dos = tb.getDataOutput();
@@ -87,13 +95,13 @@
                 writer.close();
             }
         } catch (Exception e) {
-            deinitialize();
+            treeIndexHelper.close();
             throw new HyracksDataException(e);
         }
     }
 
     @Override
     public void deinitialize() throws HyracksDataException {
-        treeIndexHelper.deinit();
+        treeIndexHelper.close();
     }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDropOperatorDescriptor.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDropOperatorDescriptor.java
deleted file mode 100644
index 7c58031..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDropOperatorDescriptor.java
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.common.dataflow;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
-import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
-import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
-import edu.uci.ics.hyracks.dataflow.std.base.AbstractSingleActivityOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-
-public class TreeIndexDropOperatorDescriptor extends
-		AbstractSingleActivityOperatorDescriptor {
-
-	private static final long serialVersionUID = 1L;
-
-	private IStorageManagerInterface storageManager;
-	private IIndexRegistryProvider<IIndex> treeIndexRegistryProvider;
-	private IFileSplitProvider fileSplitProvider;
-
-	public TreeIndexDropOperatorDescriptor(IOperatorDescriptorRegistry spec,
-			IStorageManagerInterface storageManager,
-			IIndexRegistryProvider<IIndex> treeIndexRegistryProvider,
-			IFileSplitProvider fileSplitProvider) {
-		super(spec, 0, 0);
-		this.storageManager = storageManager;
-		this.treeIndexRegistryProvider = treeIndexRegistryProvider;
-		this.fileSplitProvider = fileSplitProvider;
-	}
-
-	@Override
-	public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
-			IRecordDescriptorProvider recordDescProvider,
-			int partition, int nPartitions) {
-		return new TreeIndexDropOperatorNodePushable(ctx, storageManager,
-				treeIndexRegistryProvider, fileSplitProvider, partition);
-	}
-}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDropOperatorNodePushable.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDropOperatorNodePushable.java
deleted file mode 100644
index 5f3c0b5..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDropOperatorNodePushable.java
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.common.dataflow;
-
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import edu.uci.ics.hyracks.api.comm.IFrameWriter;
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.dataflow.std.base.AbstractOperatorNodePushable;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
-import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
-
-public class TreeIndexDropOperatorNodePushable extends AbstractOperatorNodePushable {
-    private static final Logger LOGGER = Logger.getLogger(TreeIndexDropOperatorNodePushable.class.getName());
-
-    private final IHyracksTaskContext ctx;
-    private IIndexRegistryProvider<IIndex> treeIndexRegistryProvider;
-    private IStorageManagerInterface storageManager;
-    private IFileSplitProvider fileSplitProvider;
-    private int partition;
-
-    public TreeIndexDropOperatorNodePushable(IHyracksTaskContext ctx, IStorageManagerInterface storageManager,
-            IIndexRegistryProvider<IIndex> treeIndexRegistryProvider, IFileSplitProvider fileSplitProvider,
-            int partition) {
-        this.ctx = ctx;
-        this.storageManager = storageManager;
-        this.treeIndexRegistryProvider = treeIndexRegistryProvider;
-        this.fileSplitProvider = fileSplitProvider;
-        this.partition = partition;
-    }
-
-    @Override
-    public void deinitialize() throws HyracksDataException {
-    }
-
-    @Override
-    public int getInputArity() {
-        return 0;
-    }
-
-    @Override
-    public IFrameWriter getInputFrameWriter(int index) {
-        return null;
-    }
-
-    @Override
-    public void initialize() throws HyracksDataException {
-        try {
-            IndexRegistry<IIndex> treeIndexRegistry = treeIndexRegistryProvider.getRegistry(ctx);
-            IBufferCache bufferCache = storageManager.getBufferCache(ctx);
-            IFileMapProvider fileMapProvider = storageManager.getFileMapProvider(ctx);
-
-            FileReference f = fileSplitProvider.getFileSplits()[partition].getLocalFile();
-            int indexFileId = -1;
-            synchronized (fileMapProvider) {
-                boolean fileIsMapped = fileMapProvider.isMapped(f);
-                if (!fileIsMapped) {
-                    throw new HyracksDataException("Cannot drop Tree with name " + f.toString()
-                            + ". No file mapping exists.");
-                }
-                indexFileId = fileMapProvider.lookupFileId(f);
-            }
-            // Unregister tree instance.
-            synchronized (treeIndexRegistry) {
-                treeIndexRegistry.unregister(indexFileId);
-            }
-
-            // remove name to id mapping
-            bufferCache.deleteFile(indexFileId, false);
-        }
-        // TODO: for the time being we don't throw,
-        // with proper exception handling (no hanging job problem) we should
-        // throw
-        catch (Exception e) {
-            if (LOGGER.isLoggable(Level.WARNING)) {
-                LOGGER.warning("Tree Drop Operator Failed Due To Exception: " + e.getMessage());
-            }
-        }
-    }
-
-    @Override
-    public void setOutputFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc) {
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexInsertUpdateDeleteOperatorDescriptor.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexInsertUpdateDeleteOperatorDescriptor.java
index a615386..84e6090 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexInsertUpdateDeleteOperatorDescriptor.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexInsertUpdateDeleteOperatorDescriptor.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2010 by The Regents of the University of California
+ * Copyright 2009-2012 by The Regents of the University of California
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * you may obtain a copy of the License from
@@ -23,26 +23,31 @@
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOp;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
 
 public class TreeIndexInsertUpdateDeleteOperatorDescriptor extends AbstractTreeIndexOperatorDescriptor {
 
     private static final long serialVersionUID = 1L;
 
     private final int[] fieldPermutation;
-
-    private IndexOp op;
+    private final IndexOperation op;
 
     public TreeIndexInsertUpdateDeleteOperatorDescriptor(IOperatorDescriptorRegistry spec, RecordDescriptor recDesc,
-            IStorageManagerInterface storageManager, IIndexRegistryProvider<IIndex> indexRegistryProvider,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lifecycleManagerProvider,
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
-            IBinaryComparatorFactory[] comparatorFactories, int[] fieldPermutation, IndexOp op,
-            IIndexDataflowHelperFactory dataflowHelperFactory, ITupleFilterFactory tupleFilterFactory, IOperationCallbackProvider opCallbackProvider) {
-        super(spec, 1, 1, recDesc, storageManager, indexRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, dataflowHelperFactory, tupleFilterFactory, false, opCallbackProvider);
+            IBinaryComparatorFactory[] comparatorFactories, int[] bloomFilterKeyFields, int[] fieldPermutation,
+            IndexOperation op, IIndexDataflowHelperFactory dataflowHelperFactory,
+            ITupleFilterFactory tupleFilterFactory, IModificationOperationCallbackFactory modificationOpCallbackProvider) {
+        super(spec, 1, 1, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, bloomFilterKeyFields, dataflowHelperFactory, tupleFilterFactory, false,
+                NoOpLocalResourceFactoryProvider.INSTANCE, NoOpOperationCallbackFactory.INSTANCE,
+                modificationOpCallbackProvider);
         this.fieldPermutation = fieldPermutation;
         this.op = op;
     }
@@ -50,7 +55,7 @@
     @Override
     public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
             IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
-        return new TreeIndexInsertUpdateDeleteOperatorNodePushable(this, ctx, partition, fieldPermutation,
+        return new IndexInsertUpdateDeleteOperatorNodePushable(this, ctx, partition, fieldPermutation,
                 recordDescProvider, op);
     }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexInsertUpdateDeleteOperatorNodePushable.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexInsertUpdateDeleteOperatorNodePushable.java
deleted file mode 100644
index e05568f..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexInsertUpdateDeleteOperatorNodePushable.java
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.storage.am.common.dataflow;
-
-import java.nio.ByteBuffer;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
-import edu.uci.ics.hyracks.dataflow.common.comm.util.FrameUtils;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference;
-import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputUnaryOutputOperatorNodePushable;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
-import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilter;
-import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOp;
-
-public class TreeIndexInsertUpdateDeleteOperatorNodePushable extends AbstractUnaryInputUnaryOutputOperatorNodePushable {
-    private final TreeIndexDataflowHelper treeIndexHelper;
-    private FrameTupleAccessor accessor;
-    private final IRecordDescriptorProvider recordDescProvider;
-    private final IndexOp op;
-    private final PermutingFrameTupleReference tuple = new PermutingFrameTupleReference();
-    private FrameTupleReference frameTuple;
-    private ByteBuffer writeBuffer;
-    private IIndexAccessor indexAccessor;
-    private ITupleFilter tupleFilter;
-
-    public TreeIndexInsertUpdateDeleteOperatorNodePushable(AbstractTreeIndexOperatorDescriptor opDesc,
-            IHyracksTaskContext ctx, int partition, int[] fieldPermutation,
-            IRecordDescriptorProvider recordDescProvider, IndexOp op) {
-        treeIndexHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
-                opDesc, ctx, partition);
-        this.recordDescProvider = recordDescProvider;
-        this.op = op;
-        tuple.setFieldPermutation(fieldPermutation);
-    }
-
-    @Override
-    public void open() throws HyracksDataException {
-        AbstractTreeIndexOperatorDescriptor opDesc = (AbstractTreeIndexOperatorDescriptor) treeIndexHelper
-                .getOperatorDescriptor();
-        RecordDescriptor inputRecDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
-        accessor = new FrameTupleAccessor(treeIndexHelper.getHyracksTaskContext().getFrameSize(), inputRecDesc);
-        writeBuffer = treeIndexHelper.getHyracksTaskContext().allocateFrame();
-        writer.open();
-        try {
-            treeIndexHelper.init(false);
-            ITreeIndex treeIndex = (ITreeIndex) treeIndexHelper.getIndex();
-            indexAccessor = treeIndex.createAccessor();
-            ITupleFilterFactory tupleFilterFactory = opDesc.getTupleFilterFactory();
-            if (tupleFilterFactory != null) {
-                tupleFilter = tupleFilterFactory.createTupleFilter(treeIndexHelper.ctx);
-                frameTuple = new FrameTupleReference();
-            }
-        } catch (Exception e) {
-            // cleanup in case of failure
-            treeIndexHelper.deinit();
-            throw new HyracksDataException(e);
-        }
-    }
-
-    @Override
-    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
-        accessor.reset(buffer);
-        int tupleCount = accessor.getTupleCount();
-        for (int i = 0; i < tupleCount; i++) {
-            try {
-                if (tupleFilter != null) {
-                    frameTuple.reset(accessor, i);
-                    if (!tupleFilter.accept(frameTuple)) {
-                        continue;
-                    }
-                }
-                tuple.reset(accessor, i);
-                switch (op) {
-                    case INSERT: {
-                        indexAccessor.insert(tuple);
-                        break;
-                    }
-                    case UPDATE: {
-                        indexAccessor.update(tuple);
-                        break;
-                    }
-                    case UPSERT: {
-                        indexAccessor.upsert(tuple);
-                        break;
-                    }
-                    case DELETE: {
-                        indexAccessor.delete(tuple);
-                        break;
-                    }
-                    default: {
-                        throw new HyracksDataException("Unsupported operation " + op
-                                + " in tree index InsertUpdateDelete operator");
-                    }
-                }
-            } catch (HyracksDataException e) {
-                throw e;
-            } catch (Exception e) {
-                throw new HyracksDataException(e);
-            }
-        }
-        // Pass a copy of the frame to next op.
-        System.arraycopy(buffer.array(), 0, writeBuffer.array(), 0, buffer.capacity());
-        FrameUtils.flushFrame(writeBuffer, writer);
-    }
-
-    @Override
-    public void close() throws HyracksDataException {
-        try {
-            writer.close();
-        } finally {
-            treeIndexHelper.deinit();
-        }
-    }
-
-    @Override
-    public void fail() throws HyracksDataException {
-        writer.fail();
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexSearchOperatorNodePushable.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexSearchOperatorNodePushable.java
deleted file mode 100644
index 5c19483..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexSearchOperatorNodePushable.java
+++ /dev/null
@@ -1,160 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.storage.am.common.dataflow;
-
-import java.io.DataOutput;
-import java.nio.ByteBuffer;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
-import edu.uci.ics.hyracks.dataflow.common.comm.util.FrameUtils;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputUnaryOutputOperatorNodePushable;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
-
-public abstract class TreeIndexSearchOperatorNodePushable extends AbstractUnaryInputUnaryOutputOperatorNodePushable {
-    protected final TreeIndexDataflowHelper treeIndexHelper;
-    protected FrameTupleAccessor accessor;
-
-    protected ByteBuffer writeBuffer;
-    protected FrameTupleAppender appender;
-    protected ArrayTupleBuilder tb;
-    protected DataOutput dos;
-
-    protected ITreeIndex treeIndex;
-    protected ISearchPredicate searchPred;
-    protected IIndexCursor cursor;
-    protected ITreeIndexFrame cursorFrame;
-    protected IIndexAccessor indexAccessor;
-
-    protected final RecordDescriptor inputRecDesc;
-    protected final boolean retainInput;
-    protected FrameTupleReference frameTuple;
-
-    public TreeIndexSearchOperatorNodePushable(AbstractTreeIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
-            int partition, IRecordDescriptorProvider recordDescProvider) {
-        treeIndexHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
-                opDesc, ctx, partition);
-        this.retainInput = treeIndexHelper.getOperatorDescriptor().getRetainInput();
-        inputRecDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
-    }
-
-    protected abstract ISearchPredicate createSearchPredicate();
-
-    protected abstract void resetSearchPredicate(int tupleIndex);
-
-    protected IIndexCursor createCursor() {
-        return indexAccessor.createSearchCursor();
-    }
-
-    @Override
-    public void open() throws HyracksDataException {
-        accessor = new FrameTupleAccessor(treeIndexHelper.getHyracksTaskContext().getFrameSize(), inputRecDesc);
-        writer.open();
-        try {        	
-            treeIndexHelper.init(false);
-            treeIndex = (ITreeIndex) treeIndexHelper.getIndex();
-            cursorFrame = treeIndex.getLeafFrameFactory().createFrame();
-            searchPred = createSearchPredicate();
-            writeBuffer = treeIndexHelper.getHyracksTaskContext().allocateFrame();
-            tb = new ArrayTupleBuilder(recordDesc.getFieldCount());
-            dos = tb.getDataOutput();
-            appender = new FrameTupleAppender(treeIndexHelper.getHyracksTaskContext().getFrameSize());
-            appender.reset(writeBuffer, true);
-            indexAccessor = treeIndex.createAccessor();
-            cursor = createCursor();
-            if (retainInput) {
-            	frameTuple = new FrameTupleReference();
-            }
-        } catch (Exception e) {
-            treeIndexHelper.deinit();
-            throw new HyracksDataException(e);
-        }
-    }
-
-    protected void writeSearchResults(int tupleIndex) throws Exception {
-        while (cursor.hasNext()) {
-            tb.reset();
-            cursor.next();
-            if (retainInput) {
-            	frameTuple.reset(accessor, tupleIndex);
-                for (int i = 0; i < frameTuple.getFieldCount(); i++) {
-                	dos.write(frameTuple.getFieldData(i), frameTuple.getFieldStart(i), frameTuple.getFieldLength(i));
-                    tb.addFieldEndOffset();
-                }
-            }
-            ITupleReference tuple = cursor.getTuple();
-            for (int i = 0; i < tuple.getFieldCount(); i++) {
-                dos.write(tuple.getFieldData(i), tuple.getFieldStart(i), tuple.getFieldLength(i));
-                tb.addFieldEndOffset();
-            }
-            if (!appender.append(tb.getFieldEndOffsets(), tb.getByteArray(), 0, tb.getSize())) {
-                FrameUtils.flushFrame(writeBuffer, writer);
-                appender.reset(writeBuffer, true);
-                if (!appender.append(tb.getFieldEndOffsets(), tb.getByteArray(), 0, tb.getSize())) {
-                    throw new IllegalStateException();
-                }
-            }
-        }
-    }
-
-    @Override
-    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
-        accessor.reset(buffer);
-        int tupleCount = accessor.getTupleCount();
-        try {
-            for (int i = 0; i < tupleCount; i++) {
-                resetSearchPredicate(i);
-                cursor.reset();
-                indexAccessor.search(cursor, searchPred);
-                writeSearchResults(i);
-            }
-        } catch (Exception e) {
-            throw new HyracksDataException(e);
-        }
-    }
-
-    @Override
-    public void close() throws HyracksDataException {
-        try {
-            if (appender.getTupleCount() > 0) {
-                FrameUtils.flushFrame(writeBuffer, writer);
-            }
-            writer.close();
-            try {
-                cursor.close();
-            } catch (Exception e) {
-                throw new HyracksDataException(e);
-            }
-        } finally {
-            treeIndexHelper.deinit();
-        }
-    }
-
-    @Override
-    public void fail() throws HyracksDataException {
-        writer.fail();
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexStatsOperatorDescriptor.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexStatsOperatorDescriptor.java
index 6bf0983..b589f96 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexStatsOperatorDescriptor.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexStatsOperatorDescriptor.java
@@ -24,8 +24,11 @@
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
 
 public class TreeIndexStatsOperatorDescriptor extends AbstractTreeIndexOperatorDescriptor {
 
@@ -34,11 +37,13 @@
             new ISerializerDeserializer[] { UTF8StringSerializerDeserializer.INSTANCE });
 
     public TreeIndexStatsOperatorDescriptor(IOperatorDescriptorRegistry spec, IStorageManagerInterface storageManager,
-            IIndexRegistryProvider<IIndex> indexRegistryProvider, IFileSplitProvider fileSplitProvider,
-            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] comparatorFactories,
-            IIndexDataflowHelperFactory dataflowHelperFactory, IOperationCallbackProvider opCallbackProvider) {
-        super(spec, 0, 1, recDesc, storageManager, indexRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, dataflowHelperFactory, null, false, opCallbackProvider);
+            IIndexLifecycleManagerProvider lifecycleManagerProvider, IFileSplitProvider fileSplitProvider,
+            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] comparatorFactories, int[] bloomFilterKeyFields,
+            IIndexDataflowHelperFactory dataflowHelperFactory, ISearchOperationCallbackFactory searchOpCallbackProvider) {
+        super(spec, 0, 1, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, bloomFilterKeyFields, dataflowHelperFactory, null, false,
+                NoOpLocalResourceFactoryProvider.INSTANCE, searchOpCallbackProvider,
+                NoOpOperationCallbackFactory.INSTANCE);
     }
 
     @Override
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexStatsOperatorNodePushable.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexStatsOperatorNodePushable.java
index 50486f2..09d357d 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexStatsOperatorNodePushable.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexStatsOperatorNodePushable.java
@@ -29,17 +29,21 @@
 import edu.uci.ics.hyracks.storage.am.common.util.TreeIndexStats;
 import edu.uci.ics.hyracks.storage.am.common.util.TreeIndexStatsGatherer;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
 public class TreeIndexStatsOperatorNodePushable extends AbstractUnaryOutputSourceOperatorNodePushable {
-    private final TreeIndexDataflowHelper treeIndexHelper;
+    private final AbstractTreeIndexOperatorDescriptor opDesc;
     private final IHyracksTaskContext ctx;
+    private final TreeIndexDataflowHelper treeIndexHelper;
     private TreeIndexStatsGatherer statsGatherer;
 
     public TreeIndexStatsOperatorNodePushable(AbstractTreeIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
             int partition) {
-        treeIndexHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
-                opDesc, ctx, partition);
+        this.opDesc = opDesc;
         this.ctx = ctx;
+        this.treeIndexHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory()
+                .createIndexDataflowHelper(opDesc, ctx, partition);
+
     }
 
     @Override
@@ -53,13 +57,15 @@
 
     @Override
     public void initialize() throws HyracksDataException {
+        treeIndexHelper.open();
+        ITreeIndex treeIndex = (ITreeIndex) treeIndexHelper.getIndexInstance();
         try {
             writer.open();
-            treeIndexHelper.init(false);
-            ITreeIndex treeIndex = (ITreeIndex) treeIndexHelper.getIndex();
-            IBufferCache bufferCache = treeIndexHelper.getOperatorDescriptor().getStorageManager().getBufferCache(ctx);
-            statsGatherer = new TreeIndexStatsGatherer(bufferCache, treeIndex.getFreePageManager(),
-                    treeIndexHelper.getIndexFileId(), treeIndex.getRootPageId());
+            IBufferCache bufferCache = opDesc.getStorageManager().getBufferCache(ctx);
+            IFileMapProvider fileMapProvider = opDesc.getStorageManager().getFileMapProvider(ctx);
+            int indexFileId = fileMapProvider.lookupFileId(treeIndexHelper.getFileReference());
+            statsGatherer = new TreeIndexStatsGatherer(bufferCache, treeIndex.getFreePageManager(), indexFileId,
+                    treeIndex.getRootPageId());
             TreeIndexStats stats = statsGatherer.gatherStats(treeIndex.getLeafFrameFactory().createFrame(), treeIndex
                     .getInteriorFrameFactory().createFrame(), treeIndex.getFreePageManager().getMetaDataFrameFactory()
                     .createFrame());
@@ -77,13 +83,10 @@
             }
             FrameUtils.flushFrame(frame, writer);
         } catch (Exception e) {
-            try {
-                treeIndexHelper.deinit();
-            } finally {
-                writer.fail();
-            }
+            writer.fail();
         } finally {
             writer.close();
+            treeIndexHelper.close();
         }
     }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DataGenThread.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DataGenThread.java
index e8d3d56..6fff620 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DataGenThread.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DataGenThread.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package edu.uci.ics.hyracks.storage.am.common.datagen;
 
 import java.io.IOException;
@@ -23,7 +38,8 @@
     private TupleBatch[] tupleBatches;
     private int ringPos;
     
-    public DataGenThread(int numConsumers, int maxNumBatches, int batchSize, ISerializerDeserializer[] fieldSerdes, int payloadSize, int rndSeed, int maxOutstandingBatches, boolean sorted) {
+    public DataGenThread(int numConsumers, int maxNumBatches, int batchSize, ISerializerDeserializer[] fieldSerdes,
+            int payloadSize, int rndSeed, int maxOutstandingBatches, boolean sorted) {
         this.maxNumBatches = maxNumBatches;
         this.maxOutstandingBatches = maxOutstandingBatches;
         rnd = new Random(rndSeed);
@@ -36,6 +52,19 @@
         ringPos = 0;
     }
     
+    public DataGenThread(int numConsumers, int maxNumBatches, int batchSize, ISerializerDeserializer[] fieldSerdes,
+            IFieldValueGenerator[] fieldGens, int rndSeed, int maxOutstandingBatches) {
+        this.maxNumBatches = maxNumBatches;
+        this.maxOutstandingBatches = maxOutstandingBatches;
+        rnd = new Random(rndSeed);
+        tupleBatches = new TupleBatch[maxOutstandingBatches];
+        for (int i = 0; i < maxOutstandingBatches; i++) {
+            tupleBatches[i] = new TupleBatch(batchSize, fieldGens, fieldSerdes, 0);
+        }
+        tupleBatchQueue = new LinkedBlockingQueue<TupleBatch>(maxOutstandingBatches);
+        ringPos = 0;
+    }
+    
     @Override
     public void run() {
         while(numBatches < maxNumBatches) {
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DataGenUtils.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DataGenUtils.java
index fdbaa3e..b3914e6 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DataGenUtils.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DataGenUtils.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package edu.uci.ics.hyracks.storage.am.common.datagen;
 
 import java.util.Random;
@@ -32,7 +47,6 @@
         } else if (serde instanceof UTF8StringSerializerDeserializer) {
             return new StringFieldValueGenerator(20, rnd);
         }
-        System.out.println("NULL");
         return null;
     }
     
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DocumentStringFieldValueGenerator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DocumentStringFieldValueGenerator.java
new file mode 100644
index 0000000..b12bb7d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DocumentStringFieldValueGenerator.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.datagen;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+public class DocumentStringFieldValueGenerator implements IFieldValueGenerator<String> {
+    private final String FIRST_NAMES_FILE = "dist.all.first.cleaned";
+    private final String LAST_NAMES_FILE = "dist.all.last.cleaned";
+
+    private final int docMinWords;
+    private final int docMaxWords;
+    private final int maxDictionarySize;
+    private final Random rnd;
+    private int[] cumulIntRanges;
+
+    private List<String> tokenDict = new ArrayList<String>();
+
+    public DocumentStringFieldValueGenerator(int docMinWords, int docMaxWords, int maxDictionarySize, Random rnd)
+            throws IOException {
+        this.docMinWords = docMinWords;
+        this.docMaxWords = docMaxWords;
+        this.maxDictionarySize = maxDictionarySize;
+        this.rnd = rnd;
+        initDictionary();
+        double[] zipfProbDist = ProbabilityHelper.getZipfProbDist(tokenDict.size(), 1);
+        cumulIntRanges = ProbabilityHelper.getCumulIntRanges(zipfProbDist);
+    }
+
+    private void initDictionary() throws IOException {
+        String line;
+        int count = 0;
+
+        // Read first names from data file.
+        InputStream firstNamesIn = this.getClass().getClassLoader().getResourceAsStream(FIRST_NAMES_FILE);
+        BufferedReader firstNamesReader = new BufferedReader(new InputStreamReader(firstNamesIn));
+        try {
+            while (count < maxDictionarySize && (line = firstNamesReader.readLine()) != null) {
+                tokenDict.add(line.trim());
+                count++;
+            }
+        } finally {
+            firstNamesReader.close();
+        }
+
+        // Read last names from data file.
+        InputStream lastNamesIn = this.getClass().getClassLoader().getResourceAsStream(LAST_NAMES_FILE);
+        BufferedReader lastNamesReader = new BufferedReader(new InputStreamReader(lastNamesIn));
+        try {
+            while (count < maxDictionarySize && (line = lastNamesReader.readLine()) != null) {
+                tokenDict.add(line.trim());
+                count++;
+            }
+        } finally {
+            lastNamesReader.close();
+        }
+    }
+
+    @Override
+    public String next() {
+        StringBuilder strBuilder = new StringBuilder();
+        int numWords = Math.abs(rnd.nextInt()) % (docMaxWords - docMinWords + 1) + docMinWords;
+        for (int i = 0; i < numWords; i++) {
+            int ix = ProbabilityHelper.choose(cumulIntRanges, rnd.nextInt());
+            strBuilder.append(tokenDict.get(ix));
+            if (i != numWords - 1) {
+                strBuilder.append(" ");
+            }
+        }
+        return strBuilder.toString();
+    }
+
+    public List<String> getTokenDictionary() {
+        return tokenDict;
+    }
+
+    @Override
+    public void reset() {
+    }
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DoubleFieldValueGenerator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DoubleFieldValueGenerator.java
index fcac93a..c98c249 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DoubleFieldValueGenerator.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/DoubleFieldValueGenerator.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package edu.uci.ics.hyracks.storage.am.common.datagen;
 
 import java.util.Random;
@@ -13,4 +28,8 @@
     public Double next() {
         return rnd.nextDouble();
     }
+
+    @Override
+    public void reset() {
+    }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/FloatFieldValueGenerator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/FloatFieldValueGenerator.java
index 6f21c77..7c3ff81 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/FloatFieldValueGenerator.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/FloatFieldValueGenerator.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package edu.uci.ics.hyracks.storage.am.common.datagen;
 
 import java.util.Random;
@@ -13,4 +28,8 @@
     public Float next() {
         return rnd.nextFloat();
     }
+
+    @Override
+    public void reset() {
+    }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/IFieldValueGenerator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/IFieldValueGenerator.java
index ee0d30b..dfeead6 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/IFieldValueGenerator.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/IFieldValueGenerator.java
@@ -1,5 +1,21 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package edu.uci.ics.hyracks.storage.am.common.datagen;
 
 public interface IFieldValueGenerator<T> {
     public T next();
+    public void reset();
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/IntegerFieldValueGenerator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/IntegerFieldValueGenerator.java
index 134b1f7..cd6e2a6 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/IntegerFieldValueGenerator.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/IntegerFieldValueGenerator.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package edu.uci.ics.hyracks.storage.am.common.datagen;
 
 import java.util.Random;
@@ -13,4 +28,8 @@
     public Integer next() {
         return rnd.nextInt();
     }
+
+    @Override
+    public void reset() {
+    }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/PersonNameFieldValueGenerator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/PersonNameFieldValueGenerator.java
new file mode 100644
index 0000000..6b86278
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/PersonNameFieldValueGenerator.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.datagen;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+public class PersonNameFieldValueGenerator implements IFieldValueGenerator<String> {
+    private final String FIRST_NAMES_FILE = "dist.all.first.cleaned";
+    private final String LAST_NAMES_FILE = "dist.all.last.cleaned";
+
+    private final Random rnd;
+    private final double middleInitialProb;
+    private final String letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+
+    private List<String> firstNames = new ArrayList<String>();
+    private List<String> lastNames = new ArrayList<String>();
+
+    public PersonNameFieldValueGenerator(Random rnd, double middleInitialProb)
+            throws IOException {
+        this.rnd = rnd;
+        this.middleInitialProb = middleInitialProb;
+        initNames();
+    }
+
+    private void initNames() throws IOException {
+        String line;
+
+        // Read first names from data file.
+        InputStream firstNamesIn = this.getClass().getClassLoader().getResourceAsStream(FIRST_NAMES_FILE);
+        BufferedReader firstNamesReader = new BufferedReader(new InputStreamReader(firstNamesIn));
+        try {
+            while ((line = firstNamesReader.readLine()) != null) {
+                firstNames.add(line.trim());
+            }
+        } finally {
+            firstNamesReader.close();
+        }
+
+        // Read last names from data file.
+        InputStream lastNamesIn = this.getClass().getClassLoader().getResourceAsStream(LAST_NAMES_FILE);
+        BufferedReader lastNamesReader = new BufferedReader(new InputStreamReader(lastNamesIn));
+        try {
+            while ((line = lastNamesReader.readLine()) != null) {
+                lastNames.add(line.trim());
+            }
+        } finally {
+            lastNamesReader.close();
+        }
+    }
+
+    @Override
+    public String next() {
+        StringBuilder strBuilder = new StringBuilder();
+
+        // First name.
+        int fix = Math.abs(rnd.nextInt()) % firstNames.size();
+        strBuilder.append(firstNames.get(fix));
+        strBuilder.append(" ");
+        
+        // Optional middle initial.
+        double d = Math.abs(rnd.nextDouble());
+        if (d <= middleInitialProb) {
+            int mix = Math.abs(rnd.nextInt()) % letters.length();
+            strBuilder.append(letters.charAt(mix));
+            strBuilder.append(". ");
+        }
+        
+        // Last name.
+        int lix = Math.abs(rnd.nextInt()) % lastNames.size();
+        strBuilder.append(lastNames.get(lix));
+        
+        return strBuilder.toString();
+    }
+
+    @Override
+    public void reset() {
+    }
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/ProbabilityHelper.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/ProbabilityHelper.java
new file mode 100644
index 0000000..1674681
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/ProbabilityHelper.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.datagen;
+
+import java.util.Arrays;
+
+public class ProbabilityHelper {
+    public static double[] getUniformProbDist(int numChoices) {
+        double[] probDist = new double[numChoices];
+        for (int i = 0; i < numChoices; i++) {
+            probDist[i] = 1.0 / (double) numChoices;
+        }
+        return probDist;
+    }
+
+    public static double[] getZipfProbDist(int numChoices, int zipfSkew) {
+        double[] probDist = new double[numChoices];
+        double divisor = 0;
+        for (int i = 1; i <= numChoices; i++) {
+            divisor += 1.0 / (double) Math.pow((double) i, (double) zipfSkew);
+        }
+        for (int i = 1; i <= numChoices; i++) {
+            probDist[i - 1] = (1.0 / (double) Math.pow((double) i, (double) zipfSkew)) / divisor;
+        }
+        return probDist;
+    }
+
+    public static int[] getCumulIntRanges(double[] probDist) {
+        int[] opRanges = new int[probDist.length];
+        if (opRanges.length > 1) {
+            opRanges[0] = (int) Math.floor(Integer.MAX_VALUE * probDist[0]);
+            for (int i = 1; i < opRanges.length - 1; i++) {
+                opRanges[i] = opRanges[i - 1] + (int) Math.floor(Integer.MAX_VALUE * probDist[i]);
+            }
+            opRanges[opRanges.length - 1] = Integer.MAX_VALUE;
+        } else {
+            opRanges[0] = Integer.MAX_VALUE;
+        }
+        return opRanges;
+    }
+
+    public static int choose(int[] cumulIntRanges, int randomInt) {
+        int rndVal = Math.abs(randomInt);
+        int ix = Arrays.binarySearch(cumulIntRanges, rndVal);
+        if (ix < 0) {
+            ix = -ix - 1;
+        }
+        return ix;
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/SortedDoubleFieldValueGenerator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/SortedDoubleFieldValueGenerator.java
index 4193811..e93b8de 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/SortedDoubleFieldValueGenerator.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/SortedDoubleFieldValueGenerator.java
@@ -1,17 +1,41 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package edu.uci.ics.hyracks.storage.am.common.datagen;
 
 public class SortedDoubleFieldValueGenerator implements IFieldValueGenerator<Double> {
-    private double val = 0.0d;
-
+    private double val;
+    private final double startVal;
+    
     public SortedDoubleFieldValueGenerator() {
+        startVal = 0.0d;
+        reset();
     }
     
     public SortedDoubleFieldValueGenerator(double startVal) {
-        val = startVal;
+        this.startVal = startVal;
+        reset();
     }
     
     @Override
     public Double next() {
         return val++;
     }
+
+    @Override
+    public void reset() {
+        val = startVal;        
+    }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/SortedFloatFieldValueGenerator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/SortedFloatFieldValueGenerator.java
index 1f6b315..fb163e1 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/SortedFloatFieldValueGenerator.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/SortedFloatFieldValueGenerator.java
@@ -1,17 +1,41 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package edu.uci.ics.hyracks.storage.am.common.datagen;
 
 public class SortedFloatFieldValueGenerator implements IFieldValueGenerator<Float> {
     private float val = 0.0f;
-
+    private final float startVal;
+    
     public SortedFloatFieldValueGenerator() {
+        startVal = 0.0f;
+        reset();
     }
     
     public SortedFloatFieldValueGenerator(float startVal) {
-        val = startVal;
+        this.startVal = startVal;
+        reset();
     }
     
     @Override
     public Float next() {
         return val++;
     }
+
+    @Override
+    public void reset() {
+        val = startVal;
+    }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/SortedIntegerFieldValueGenerator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/SortedIntegerFieldValueGenerator.java
index 8f7fdcf..a036772 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/SortedIntegerFieldValueGenerator.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/SortedIntegerFieldValueGenerator.java
@@ -1,17 +1,41 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package edu.uci.ics.hyracks.storage.am.common.datagen;
 
 public class SortedIntegerFieldValueGenerator implements IFieldValueGenerator<Integer> {
     private int val = 0;
+    private final int startVal;
 
     public SortedIntegerFieldValueGenerator() {
+        startVal = 0;
+        reset();
     }
     
     public SortedIntegerFieldValueGenerator(int startVal) {
-        val = startVal;
+        this.startVal = startVal;
+        reset();
     }
     
     @Override
     public Integer next() {
         return val++;
     }
+
+    @Override
+    public void reset() {
+        val = startVal;
+    }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/StringFieldValueGenerator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/StringFieldValueGenerator.java
index 0218542..6bf01a4 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/StringFieldValueGenerator.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/StringFieldValueGenerator.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package edu.uci.ics.hyracks.storage.am.common.datagen;
 
 import java.util.Random;
@@ -24,4 +39,8 @@
         }
         return strBuilder.toString();
     }
+
+    @Override
+    public void reset() {
+    }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/TupleBatch.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/TupleBatch.java
index bfa523f..375aeb0 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/TupleBatch.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/TupleBatch.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package edu.uci.ics.hyracks.storage.am.common.datagen;
 
 import java.io.IOException;
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/TupleGenerator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/TupleGenerator.java
index 2801205..d0a1062 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/TupleGenerator.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/datagen/TupleGenerator.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package edu.uci.ics.hyracks.storage.am.common.datagen;
 
 import java.io.DataOutput;
@@ -48,4 +63,18 @@
     public ITupleReference get() {
         return tuple;
     }
+    
+    public void reset() {
+        for (IFieldValueGenerator fieldGen : fieldGens) {
+            fieldGen.reset();
+        }
+    }
+    
+    public ISerializerDeserializer[] getFieldSerdes() {
+        return fieldSerdes;
+    }
+    
+    public IFieldValueGenerator[] getFieldGens() {
+        return fieldGens;
+    }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/frames/LIFOMetaDataFrame.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/frames/LIFOMetaDataFrame.java
index 31c674d..1b8bc15 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/frames/LIFOMetaDataFrame.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/frames/LIFOMetaDataFrame.java
@@ -36,6 +36,7 @@
 	protected static final int levelOff = maxPageOff + 12; //20
 	protected static final int nextPageOff = levelOff + 1; // 21
 	protected static final int validOff = nextPageOff + 4; // 25
+	protected static final int lsnOff = validOff + 4; // 29
 
 	protected ICachedPage page = null;
 	protected ByteBuffer buf = null;
@@ -101,7 +102,7 @@
 	@Override
 	public void initBuffer(byte level) {
 		buf.putInt(tupleCountOff, 0);
-		buf.putInt(freeSpaceOff, validOff + 4);
+		buf.putInt(freeSpaceOff, lsnOff + 4);
 		//buf.putInt(maxPageOff, -1);
 		buf.put(levelOff, level);
 		buf.putInt(nextPageOff, -1);
@@ -131,4 +132,14 @@
             buf.putInt(validOff, 0);
         }
     }
+
+    @Override
+    public long getLSN() {
+        return buf.getLong(lsnOff);
+    }
+
+    @Override
+    public void setLSN(long lsn) {
+        buf.putLong(lsnOff, lsn);
+    }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/frames/TreeIndexNSMFrame.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/frames/TreeIndexNSMFrame.java
index e2e28fd..31ce573 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/frames/TreeIndexNSMFrame.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/frames/TreeIndexNSMFrame.java
@@ -111,7 +111,7 @@
         resetSpaceParams();
         int tupleCount = buf.getInt(tupleCountOff);
         int freeSpace = buf.getInt(freeSpaceOff);
-		// Sort the slots by the tuple offset they point to.
+        // Sort the slots by the tuple offset they point to.
         ArrayList<SlotOffTupleOff> sortedTupleOffs = new ArrayList<SlotOffTupleOff>();
         sortedTupleOffs.ensureCapacity(tupleCount);
         for (int i = 0; i < tupleCount; i++) {
@@ -121,7 +121,7 @@
         }
         Collections.sort(sortedTupleOffs);
         // Iterate over the sorted slots, and move their corresponding tuples to
-     	// the left, reclaiming free space.
+        // the left, reclaiming free space.
         for (int i = 0; i < sortedTupleOffs.size(); i++) {
             int tupleOff = sortedTupleOffs.get(i).tupleOff;
             frameTuple.resetByTupleOffset(buf, tupleOff);
@@ -132,7 +132,7 @@
             slotManager.setSlot(sortedTupleOffs.get(i).slotOff, freeSpace);
             freeSpace += tupleLength;
         }
-		// Update contiguous free space pointer and total free space indicator.
+        // Update contiguous free space pointer and total free space indicator.
         buf.putInt(freeSpaceOff, freeSpace);
         buf.putInt(totalFreeSpaceOff, buf.capacity() - freeSpace - tupleCount * slotManager.getSlotSize());
         return false;
@@ -159,7 +159,7 @@
     public FrameOpSpaceStatus hasSpaceInsert(ITupleReference tuple) {
         int bytesRequired = tupleWriter.bytesRequired(tuple);
         // Enough space in the contiguous space region?
-        if (bytesRequired + slotManager.getSlotSize() <= buf.capacity() - buf.getInt(freeSpaceOff) 
+        if (bytesRequired + slotManager.getSlotSize() <= buf.capacity() - buf.getInt(freeSpaceOff)
                 - (buf.getInt(tupleCountOff) * slotManager.getSlotSize())) {
             return FrameOpSpaceStatus.SUFFICIENT_CONTIGUOUS_SPACE;
         }
@@ -172,23 +172,24 @@
 
     @Override
     public FrameOpSpaceStatus hasSpaceUpdate(ITupleReference newTuple, int oldTupleIndex) {
-    	frameTuple.resetByTupleIndex(this, oldTupleIndex);
-    	int oldTupleBytes = frameTuple.getTupleSize();
-    	int newTupleBytes = tupleWriter.bytesRequired(newTuple);
-    	int additionalBytesRequired = newTupleBytes - oldTupleBytes;
-    	// Enough space for an in-place update?
-    	if (additionalBytesRequired <= 0) {
-    		return FrameOpSpaceStatus.SUFFICIENT_INPLACE_SPACE;
-    	}
-    	// Enough space if we delete the old tuple and insert the new one without compaction? 
-    	if (newTupleBytes <= buf.capacity() - buf.getInt(freeSpaceOff)
+        frameTuple.resetByTupleIndex(this, oldTupleIndex);
+        int oldTupleBytes = frameTuple.getTupleSize();
+        int newTupleBytes = tupleWriter.bytesRequired(newTuple);
+        int additionalBytesRequired = newTupleBytes - oldTupleBytes;
+        // Enough space for an in-place update?
+        if (additionalBytesRequired <= 0) {
+            return FrameOpSpaceStatus.SUFFICIENT_INPLACE_SPACE;
+        }
+        // Enough space if we delete the old tuple and insert the new one
+        // without compaction?
+        if (newTupleBytes <= buf.capacity() - buf.getInt(freeSpaceOff)
                 - (buf.getInt(tupleCountOff) * slotManager.getSlotSize())) {
-    		return FrameOpSpaceStatus.SUFFICIENT_CONTIGUOUS_SPACE;
-    	}
-    	// Enough space if we delete the old tuple and compact?
-    	if (additionalBytesRequired <= buf.getInt(totalFreeSpaceOff)) {
-    		return FrameOpSpaceStatus.SUFFICIENT_SPACE;
-    	}
+            return FrameOpSpaceStatus.SUFFICIENT_CONTIGUOUS_SPACE;
+        }
+        // Enough space if we delete the old tuple and compact?
+        if (additionalBytesRequired <= buf.getInt(totalFreeSpaceOff)) {
+            return FrameOpSpaceStatus.SUFFICIENT_SPACE;
+        }
         return FrameOpSpaceStatus.INSUFFICIENT_SPACE;
     }
 
@@ -208,35 +209,36 @@
 
     @Override
     public void update(ITupleReference newTuple, int oldTupleIndex, boolean inPlace) {
-    	frameTuple.resetByTupleIndex(this, oldTupleIndex);
-		int oldTupleBytes = frameTuple.getTupleSize();
-		int slotOff = slotManager.getSlotOff(oldTupleIndex);
-		int bytesWritten = 0;
-    	if (inPlace) {    		
-    		// Overwrite the old tuple in place.
-    		bytesWritten = tupleWriter.writeTuple(newTuple, buf.array(), buf.getInt(slotOff));
-    	} else {
-    		// Insert the new tuple at the end of the free space, and change the slot value (effectively "deleting" the old tuple).
-    		int newTupleOff = buf.getInt(freeSpaceOff);
-    		bytesWritten = tupleWriter.writeTuple(newTuple, buf.array(), newTupleOff);
-    		// Update slot value.
-    		buf.putInt(slotOff, newTupleOff);
-    		// Update contiguous free space pointer.
-    		buf.putInt(freeSpaceOff, newTupleOff + bytesWritten);
-    	}
-    	buf.putInt(totalFreeSpaceOff, buf.getInt(totalFreeSpaceOff) + oldTupleBytes - bytesWritten);
+        frameTuple.resetByTupleIndex(this, oldTupleIndex);
+        int oldTupleBytes = frameTuple.getTupleSize();
+        int slotOff = slotManager.getSlotOff(oldTupleIndex);
+        int bytesWritten = 0;
+        if (inPlace) {
+            // Overwrite the old tuple in place.
+            bytesWritten = tupleWriter.writeTuple(newTuple, buf.array(), buf.getInt(slotOff));
+        } else {
+            // Insert the new tuple at the end of the free space, and change the
+            // slot value (effectively "deleting" the old tuple).
+            int newTupleOff = buf.getInt(freeSpaceOff);
+            bytesWritten = tupleWriter.writeTuple(newTuple, buf.array(), newTupleOff);
+            // Update slot value.
+            buf.putInt(slotOff, newTupleOff);
+            // Update contiguous free space pointer.
+            buf.putInt(freeSpaceOff, newTupleOff + bytesWritten);
+        }
+        buf.putInt(totalFreeSpaceOff, buf.getInt(totalFreeSpaceOff) + oldTupleBytes - bytesWritten);
     }
 
     @Override
     public String printHeader() {
-    	StringBuilder strBuilder = new StringBuilder();
-    	strBuilder.append("pageLsnOff:        " + pageLsnOff + "\n");
-    	strBuilder.append("tupleCountOff:     " + tupleCountOff + "\n");
-    	strBuilder.append("freeSpaceOff:      " + freeSpaceOff + "\n");
-    	strBuilder.append("totalFreeSpaceOff: " + totalFreeSpaceOff + "\n");
-    	strBuilder.append("levelOff:          " + levelOff + "\n");
-    	strBuilder.append("smFlagOff:         " + smFlagOff + "\n");
-    	return strBuilder.toString();
+        StringBuilder strBuilder = new StringBuilder();
+        strBuilder.append("pageLsnOff:        " + pageLsnOff + "\n");
+        strBuilder.append("tupleCountOff:     " + tupleCountOff + "\n");
+        strBuilder.append("freeSpaceOff:      " + freeSpaceOff + "\n");
+        strBuilder.append("totalFreeSpaceOff: " + totalFreeSpaceOff + "\n");
+        strBuilder.append("levelOff:          " + levelOff + "\n");
+        strBuilder.append("smFlagOff:         " + smFlagOff + "\n");
+        return strBuilder.toString();
     }
 
     @Override
@@ -282,14 +284,13 @@
     public ITreeIndexTupleWriter getTupleWriter() {
         return tupleWriter;
     }
-    
+
     @Override
     public ITreeIndexTupleReference createTupleReference() {
-    	return tupleWriter.createTupleReference();
+        return tupleWriter.createTupleReference();
     }
-    
-	public int getFreeContiguousSpace() {
-		return buf.capacity() - getFreeSpaceOff()
-				- (getTupleCount() * slotManager.getSlotSize());
-	}
+
+    public int getFreeContiguousSpace() {
+        return buf.capacity() - getFreeSpaceOff() - (getTupleCount() * slotManager.getSlotSize());
+    }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/freepage/LinkedListFreePageManagerFactory.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/freepage/LinkedListFreePageManagerFactory.java
index 157b563..1c373d5 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/freepage/LinkedListFreePageManagerFactory.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/freepage/LinkedListFreePageManagerFactory.java
@@ -16,19 +16,21 @@
 package edu.uci.ics.hyracks.storage.am.common.freepage;
 
 import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManagerFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 
-public class LinkedListFreePageManagerFactory {
+public class LinkedListFreePageManagerFactory implements IFreePageManagerFactory {
 
-	private final ITreeIndexMetaDataFrameFactory metaDataFrameFactory;
-	private final IBufferCache bufferCache;
-	
-	public LinkedListFreePageManagerFactory(IBufferCache bufferCache, ITreeIndexMetaDataFrameFactory metaDataFrameFactory) {
-		this.metaDataFrameFactory = metaDataFrameFactory;
-		this.bufferCache = bufferCache;
-	}
-	
+    private final ITreeIndexMetaDataFrameFactory metaDataFrameFactory;
+    private final IBufferCache bufferCache;
+
+    public LinkedListFreePageManagerFactory(IBufferCache bufferCache,
+            ITreeIndexMetaDataFrameFactory metaDataFrameFactory) {
+        this.metaDataFrameFactory = metaDataFrameFactory;
+        this.bufferCache = bufferCache;
+    }
+
     public IFreePageManager createFreePageManager() {
         return new LinkedListFreePageManager(bufferCache, 0, metaDataFrameFactory);
     }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/AbstractTreeIndex.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/AbstractTreeIndex.java
new file mode 100644
index 0000000..9bf4a4f
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/AbstractTreeIndex.java
@@ -0,0 +1,359 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.impls;
+
+import java.util.ArrayList;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrame;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleWriter;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public abstract class AbstractTreeIndex implements ITreeIndex {
+
+    protected final static int rootPage = 1;
+
+    protected final IBufferCache bufferCache;
+    protected final IFileMapProvider fileMapProvider;
+    protected final IFreePageManager freePageManager;
+
+    protected final ITreeIndexFrameFactory interiorFrameFactory;
+    protected final ITreeIndexFrameFactory leafFrameFactory;
+
+    protected final IBinaryComparatorFactory[] cmpFactories;
+    protected final int fieldCount;
+
+    protected FileReference file;
+    protected int fileId = -1;
+
+    private boolean isActivated = false;
+
+    public AbstractTreeIndex(IBufferCache bufferCache, IFileMapProvider fileMapProvider,
+            IFreePageManager freePageManager, ITreeIndexFrameFactory interiorFrameFactory,
+            ITreeIndexFrameFactory leafFrameFactory, IBinaryComparatorFactory[] cmpFactories, int fieldCount,
+            FileReference file) {
+        this.bufferCache = bufferCache;
+        this.fileMapProvider = fileMapProvider;
+        this.freePageManager = freePageManager;
+        this.interiorFrameFactory = interiorFrameFactory;
+        this.leafFrameFactory = leafFrameFactory;
+        this.cmpFactories = cmpFactories;
+        this.fieldCount = fieldCount;
+        this.file = file;
+    }
+
+    public synchronized void create() throws HyracksDataException {
+        if (isActivated) {
+            throw new HyracksDataException("Failed to create the index since it is activated.");
+        }
+
+        boolean fileIsMapped = false;
+        synchronized (fileMapProvider) {
+            fileIsMapped = fileMapProvider.isMapped(file);
+            if (!fileIsMapped) {
+                bufferCache.createFile(file);
+            }
+            fileId = fileMapProvider.lookupFileId(file);
+            try {
+                // Also creates the file if it doesn't exist yet.
+                bufferCache.openFile(fileId);
+            } catch (HyracksDataException e) {
+                // Revert state of buffer cache since file failed to open.
+                if (!fileIsMapped) {
+                    bufferCache.deleteFile(fileId, false);
+                }
+                throw e;
+            }
+        }
+
+        freePageManager.open(fileId);
+        initEmptyTree();
+        freePageManager.close();
+        bufferCache.closeFile(fileId);
+    }
+
+    private void initEmptyTree() throws HyracksDataException {
+        ITreeIndexFrame frame = leafFrameFactory.createFrame();
+        ITreeIndexMetaDataFrame metaFrame = freePageManager.getMetaDataFrameFactory().createFrame();
+        freePageManager.init(metaFrame, rootPage);
+
+        ICachedPage rootNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, rootPage), true);
+        rootNode.acquireWriteLatch();
+        try {
+            frame.setPage(rootNode);
+            frame.initBuffer((byte) 0);
+        } finally {
+            rootNode.releaseWriteLatch();
+            bufferCache.unpin(rootNode);
+        }
+    }
+
+    public synchronized void activate() throws HyracksDataException {
+        if (isActivated) {
+            return;
+        }
+
+        boolean fileIsMapped = false;
+        synchronized (fileMapProvider) {
+            fileIsMapped = fileMapProvider.isMapped(file);
+            if (!fileIsMapped) {
+                bufferCache.createFile(file);
+            }
+            fileId = fileMapProvider.lookupFileId(file);
+            try {
+                // Also creates the file if it doesn't exist yet.
+                bufferCache.openFile(fileId);
+            } catch (HyracksDataException e) {
+                // Revert state of buffer cache since file failed to open.
+                if (!fileIsMapped) {
+                    bufferCache.deleteFile(fileId, false);
+                }
+                throw e;
+            }
+        }
+        freePageManager.open(fileId);
+
+        // TODO: Should probably have some way to check that the tree is physically consistent
+        // or that the file we just opened actually is a tree
+
+        isActivated = true;
+    }
+
+    public synchronized void deactivate() throws HyracksDataException {
+        if (!isActivated) {
+            return;
+        }
+
+        bufferCache.closeFile(fileId);
+        freePageManager.close();
+
+        isActivated = false;
+    }
+
+    public synchronized void destroy() throws HyracksDataException {
+        if (isActivated) {
+            throw new HyracksDataException("Failed to destroy the index since it is activated.");
+        }
+
+        file.delete();
+        if (fileId == -1) {
+            return;
+        }
+
+        bufferCache.deleteFile(fileId, false);
+        fileId = -1;
+    }
+
+    public synchronized void clear() throws HyracksDataException {
+        if (!isActivated) {
+            throw new HyracksDataException("Failed to clear the index since it is not activated.");
+        }
+        initEmptyTree();
+    }
+
+    public boolean isEmptyTree(ITreeIndexFrame frame) throws HyracksDataException {
+        ICachedPage rootNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, rootPage), false);
+        rootNode.acquireReadLatch();
+        try {
+            frame.setPage(rootNode);
+            if (frame.getLevel() == 0 && frame.getTupleCount() == 0) {
+                return true;
+            } else {
+                return false;
+            }
+        } finally {
+            rootNode.releaseReadLatch();
+            bufferCache.unpin(rootNode);
+        }
+    }
+
+    public byte getTreeHeight(ITreeIndexFrame frame) throws HyracksDataException {
+        ICachedPage rootNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, rootPage), false);
+        rootNode.acquireReadLatch();
+        try {
+            frame.setPage(rootNode);
+            return frame.getLevel();
+        } finally {
+            rootNode.releaseReadLatch();
+            bufferCache.unpin(rootNode);
+        }
+    }
+
+    public int getFileId() {
+        return fileId;
+    }
+
+    public FileReference getFileReference() {
+        return file;
+    }
+
+    public IBufferCache getBufferCache() {
+        return bufferCache;
+    }
+
+    public ITreeIndexFrameFactory getInteriorFrameFactory() {
+        return interiorFrameFactory;
+    }
+
+    public ITreeIndexFrameFactory getLeafFrameFactory() {
+        return leafFrameFactory;
+    }
+
+    public IBinaryComparatorFactory[] getComparatorFactories() {
+        return cmpFactories;
+    }
+
+    public IFreePageManager getFreePageManager() {
+        return freePageManager;
+    }
+
+    public int getRootPageId() {
+        return rootPage;
+    }
+
+    public int getFieldCount() {
+        return fieldCount;
+    }
+
+    public abstract class AbstractTreeIndexBulkLoader implements IIndexBulkLoader {
+        protected final MultiComparator cmp;
+        protected final int slotSize;
+        protected final int leafMaxBytes;
+        protected final int interiorMaxBytes;
+        protected final ArrayList<NodeFrontier> nodeFrontiers = new ArrayList<NodeFrontier>();
+        protected final ITreeIndexMetaDataFrame metaFrame;
+        protected final ITreeIndexTupleWriter tupleWriter;
+        protected ITreeIndexFrame leafFrame;
+        protected ITreeIndexFrame interiorFrame;
+
+        public AbstractTreeIndexBulkLoader(float fillFactor) throws TreeIndexException, HyracksDataException {
+            leafFrame = leafFrameFactory.createFrame();
+            interiorFrame = interiorFrameFactory.createFrame();
+            metaFrame = freePageManager.getMetaDataFrameFactory().createFrame();
+
+            if (!isEmptyTree(leafFrame)) {
+                throw new TreeIndexException("Cannot bulk-load a non-empty tree.");
+            }
+
+            this.cmp = MultiComparator.createIgnoreFieldLength(cmpFactories);
+
+            leafFrame.setMultiComparator(cmp);
+            interiorFrame.setMultiComparator(cmp);
+
+            tupleWriter = leafFrame.getTupleWriter();
+
+            NodeFrontier leafFrontier = new NodeFrontier(leafFrame.createTupleReference());
+            leafFrontier.pageId = freePageManager.getFreePage(metaFrame);
+            leafFrontier.page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, leafFrontier.pageId), true);
+            leafFrontier.page.acquireWriteLatch();
+
+            interiorFrame.setPage(leafFrontier.page);
+            interiorFrame.initBuffer((byte) 0);
+            interiorMaxBytes = (int) ((float) interiorFrame.getBuffer().capacity() * fillFactor);
+
+            leafFrame.setPage(leafFrontier.page);
+            leafFrame.initBuffer((byte) 0);
+            leafMaxBytes = (int) ((float) leafFrame.getBuffer().capacity() * fillFactor);
+            slotSize = leafFrame.getSlotSize();
+
+            nodeFrontiers.add(leafFrontier);
+        }
+
+        public abstract void add(ITupleReference tuple) throws IndexException, HyracksDataException;
+
+        protected void handleException() throws HyracksDataException {
+            // Unlatch and unpin pages.
+            for (NodeFrontier nodeFrontier : nodeFrontiers) {
+                nodeFrontier.page.releaseWriteLatch();
+                bufferCache.unpin(nodeFrontier.page);
+            }
+        }
+
+        @Override
+        public void end() throws HyracksDataException {
+            // copy the root generated from the bulk-load to *the* root page location
+            ICachedPage newRoot = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, rootPage), true);
+            newRoot.acquireWriteLatch();
+            NodeFrontier lastNodeFrontier = nodeFrontiers.get(nodeFrontiers.size() - 1);
+            try {
+                System.arraycopy(lastNodeFrontier.page.getBuffer().array(), 0, newRoot.getBuffer().array(), 0,
+                        lastNodeFrontier.page.getBuffer().capacity());
+            } finally {
+                newRoot.releaseWriteLatch();
+                bufferCache.unpin(newRoot);
+
+                // register old root as a free page
+                freePageManager.addFreePage(metaFrame, lastNodeFrontier.pageId);
+
+                for (int i = 0; i < nodeFrontiers.size(); i++) {
+                    nodeFrontiers.get(i).page.releaseWriteLatch();
+                    bufferCache.unpin(nodeFrontiers.get(i).page);
+                }
+            }
+        }
+
+        protected void addLevel() throws HyracksDataException {
+            NodeFrontier frontier = new NodeFrontier(tupleWriter.createTupleReference());
+            frontier.pageId = freePageManager.getFreePage(metaFrame);
+            frontier.page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, frontier.pageId), true);
+            frontier.page.acquireWriteLatch();
+            frontier.lastTuple.setFieldCount(cmp.getKeyFieldCount());
+            interiorFrame.setPage(frontier.page);
+            interiorFrame.initBuffer((byte) nodeFrontiers.size());
+            nodeFrontiers.add(frontier);
+        }
+    }
+
+    public class TreeIndexInsertBulkLoader implements IIndexBulkLoader {
+        ITreeIndexAccessor accessor = (ITreeIndexAccessor) createAccessor(NoOpOperationCallback.INSTANCE,
+                NoOpOperationCallback.INSTANCE);
+
+        @Override
+        public void add(ITupleReference tuple) throws HyracksDataException {
+            try {
+                accessor.insert(tuple);
+            } catch (IndexException e) {
+                throw new HyracksDataException(e);
+            }
+        }
+
+        @Override
+        public void end() throws HyracksDataException {
+            // do nothing
+        }
+
+    }
+
+    @Override
+    public long getMemoryAllocationSize() {
+        return 0;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallback.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallback.java
index 828dd81..6fc8dcf 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallback.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallback.java
@@ -16,26 +16,37 @@
 package edu.uci.ics.hyracks.storage.am.common.impls;
 
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
 
 /**
- * Dummy operation callback that simply does nothing. Mainly, intended to be
- * used in non-transaction access method testing.
+ * Dummy operation callback that simply does nothing.
  */
-public class NoOpOperationCallback implements IOperationCallback {
+public enum NoOpOperationCallback implements IModificationOperationCallback, ISearchOperationCallback {
+    INSTANCE;
 
-    public static IOperationCallback INSTANCE = new NoOpOperationCallback();
-    
-    private NoOpOperationCallback() {
-    }
-    
     @Override
-    public void pre(ITupleReference tuple) {
+    public boolean proceed(ITupleReference tuple) {
+        return true;
+    }
+
+    @Override
+    public void reconcile(ITupleReference tuple) {
         // Do nothing.
     }
 
     @Override
-    public void post(ITupleReference tuple) {
+    public void before(ITupleReference tuple) {
+        // Do nothing.        
+    }
+
+    @Override
+    public void found(ITupleReference before, ITupleReference after) {
+        // Do nothing.        
+    }
+
+    @Override
+    public void cancel(ITupleReference tuple) {
         // Do nothing.
     }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallbackFactory.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallbackFactory.java
new file mode 100644
index 0000000..4c641a6
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallbackFactory.java
@@ -0,0 +1,26 @@
+package edu.uci.ics.hyracks.storage.am.common.impls;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
+
+/**
+ * Dummy NoOp callback factory used primarily for testing. Always returns the {@link NoOpOperationCallback} instance.
+ * Implemented as an enum to preserve singleton model while being serializable
+ */
+public enum NoOpOperationCallbackFactory implements ISearchOperationCallbackFactory,
+        IModificationOperationCallbackFactory {
+    INSTANCE;
+
+    @Override
+    public IModificationOperationCallback createModificationOperationCallback(long resourceId, Object resource, IHyracksTaskContext ctx) {
+        return NoOpOperationCallback.INSTANCE;
+    }
+
+    @Override
+    public ISearchOperationCallback createSearchOperationCallback(long resourceId, IHyracksTaskContext ctx) {
+        return NoOpOperationCallback.INSTANCE;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallbackProvider.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallbackProvider.java
deleted file mode 100644
index 55dfb74..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallbackProvider.java
+++ /dev/null
@@ -1,19 +0,0 @@
-package edu.uci.ics.hyracks.storage.am.common.impls;
-
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallback;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
-
-/**
- * Dummy NoOp callback provider used primarily for testing. Always returns the 
- * {@link NoOpOperationCallback} instance. 
- *
- * Implemented as an enum to preserve singleton model while being serializable
- */
-public enum NoOpOperationCallbackProvider implements IOperationCallbackProvider {
-    INSTANCE;
-
-    @Override
-    public IOperationCallback getOperationCallback() {
-        return NoOpOperationCallback.INSTANCE;
-    }
-}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NodeFrontier.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NodeFrontier.java
new file mode 100644
index 0000000..56f5fdb
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NodeFrontier.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.impls;
+
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+
+public class NodeFrontier {
+    public ICachedPage page;
+    public int pageId;
+    public ITreeIndexTupleReference lastTuple;
+
+    public NodeFrontier(ITreeIndexTupleReference lastTuple) {
+        this.lastTuple = lastTuple;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/TreeDiskOrderScanCursor.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/TreeDiskOrderScanCursor.java
deleted file mode 100644
index ea4c105..0000000
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/TreeDiskOrderScanCursor.java
+++ /dev/null
@@ -1,154 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.common.impls;
-
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
-import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
-import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
-import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
-import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
-
-public class TreeDiskOrderScanCursor implements ITreeIndexCursor {
-
-	private int tupleIndex = 0;
-	private int fileId = -1;
-	private int currentPageId = -1;
-	private int maxPageId = -1;
-	private ICachedPage page = null;	
-	private IBufferCache bufferCache = null;
-	
-	private final ITreeIndexFrame frame;
-	private final ITreeIndexTupleReference frameTuple;
-	
-	public TreeDiskOrderScanCursor(ITreeIndexFrame frame) {
-		this.frame = frame;		
-		this.frameTuple = frame.createTupleReference();
-	}
-
-	@Override
-	public void close() throws HyracksDataException {
-		page.releaseReadLatch();
-		bufferCache.unpin(page);
-		page = null;
-	}
-
-	@Override
-	public ITreeIndexTupleReference getTuple() {
-		return frameTuple;
-	}
-
-	@Override
-	public ICachedPage getPage() {
-		return page;
-	}
-
-	private boolean positionToNextLeaf(boolean skipCurrent)
-			throws HyracksDataException {
-		while ((frame.getLevel() != 0 || skipCurrent || frame.getTupleCount() == 0) && (currentPageId <= maxPageId)) {
-			currentPageId++;
-
-			page.releaseReadLatch();
-            bufferCache.unpin(page);
-			
-			ICachedPage nextPage = bufferCache.pin(
-					BufferedFileHandle.getDiskPageId(fileId, currentPageId),
-					false);
-			nextPage.acquireReadLatch();
-
-			page = nextPage;
-			frame.setPage(page);
-			tupleIndex = 0;
-			skipCurrent = false;
-		}
-		if (currentPageId <= maxPageId) {
-			return true;
-		} else {
-			return false;
-		}
-	}
-
-	@Override
-	public boolean hasNext() throws HyracksDataException {		
-		if (currentPageId > maxPageId) {
-			return false;
-		}
-		if (tupleIndex >= frame.getTupleCount()) {
-			boolean nextLeafExists = positionToNextLeaf(true);
-			if (nextLeafExists) {
-				frameTuple.resetByTupleIndex(frame, tupleIndex);
-				return true;
-			} else {
-				return false;
-			}
-		}		
-		frameTuple.resetByTupleIndex(frame, tupleIndex);		
-		return true;
-	}
-
-	@Override
-	public void next() throws HyracksDataException {
-		tupleIndex++;
-	}
-
-	@Override
-	public void open(ICursorInitialState initialState,
-			ISearchPredicate searchPred) throws HyracksDataException {
-		// in case open is called multiple times without closing
-		if (page != null) {
-			page.releaseReadLatch();
-			bufferCache.unpin(page);
-		}
-		page = initialState.getPage();
-		tupleIndex = 0;		
-		frame.setPage(page);
-		positionToNextLeaf(false);
-	}
-
-	@Override
-	public void reset() {
-		tupleIndex = 0;
-		currentPageId = -1;
-		maxPageId = -1;
-		page = null;
-	}
-
-	@Override
-	public void setBufferCache(IBufferCache bufferCache) {
-		this.bufferCache = bufferCache;
-	}
-
-	@Override
-	public void setFileId(int fileId) {
-		this.fileId = fileId;
-	}
-
-	public void setCurrentPageId(int currentPageId) {
-		this.currentPageId = currentPageId;
-	}
-
-	public void setMaxPageId(int maxPageId) {
-		this.maxPageId = maxPageId;
-	}
-
-	@Override
-	public boolean exclusiveLatchNodes() {
-		return false;
-	}
-}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/TreeIndexDiskOrderScanCursor.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/TreeIndexDiskOrderScanCursor.java
new file mode 100644
index 0000000..738d987
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/TreeIndexDiskOrderScanCursor.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+
+public class TreeIndexDiskOrderScanCursor implements ITreeIndexCursor {
+
+    private int tupleIndex = 0;
+    private int fileId = -1;
+    private int currentPageId = -1;
+    private int maxPageId = -1;
+    private ICachedPage page = null;
+    private IBufferCache bufferCache = null;
+
+    private final ITreeIndexFrame frame;
+    private final ITreeIndexTupleReference frameTuple;
+
+    public TreeIndexDiskOrderScanCursor(ITreeIndexFrame frame) {
+        this.frame = frame;
+        this.frameTuple = frame.createTupleReference();
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        page.releaseReadLatch();
+        bufferCache.unpin(page);
+        page = null;
+    }
+
+    @Override
+    public ITreeIndexTupleReference getTuple() {
+        return frameTuple;
+    }
+
+    @Override
+    public ICachedPage getPage() {
+        return page;
+    }
+
+    private boolean positionToNextLeaf(boolean skipCurrent) throws HyracksDataException {
+        while ((frame.getLevel() != 0 || skipCurrent || frame.getTupleCount() == 0) && (currentPageId <= maxPageId)) {
+            currentPageId++;
+
+            page.releaseReadLatch();
+            bufferCache.unpin(page);
+
+            ICachedPage nextPage = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, currentPageId), false);
+            nextPage.acquireReadLatch();
+
+            page = nextPage;
+            frame.setPage(page);
+            tupleIndex = 0;
+            skipCurrent = false;
+        }
+        if (currentPageId <= maxPageId) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    public boolean hasNext() throws HyracksDataException {
+        if (currentPageId > maxPageId) {
+            return false;
+        }
+        if (tupleIndex >= frame.getTupleCount()) {
+            boolean nextLeafExists = positionToNextLeaf(true);
+            if (nextLeafExists) {
+                frameTuple.resetByTupleIndex(frame, tupleIndex);
+                return true;
+            } else {
+                return false;
+            }
+        }
+        frameTuple.resetByTupleIndex(frame, tupleIndex);
+        return true;
+    }
+
+    @Override
+    public void next() throws HyracksDataException {
+        tupleIndex++;
+    }
+
+    @Override
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws HyracksDataException {
+        // in case open is called multiple times without closing
+        if (page != null) {
+            page.releaseReadLatch();
+            bufferCache.unpin(page);
+        }
+        page = initialState.getPage();
+        tupleIndex = 0;
+        frame.setPage(page);
+        positionToNextLeaf(false);
+    }
+
+    @Override
+    public void reset() {
+        tupleIndex = 0;
+        currentPageId = -1;
+        maxPageId = -1;
+        page = null;
+    }
+
+    @Override
+    public void setBufferCache(IBufferCache bufferCache) {
+        this.bufferCache = bufferCache;
+    }
+
+    @Override
+    public void setFileId(int fileId) {
+        this.fileId = fileId;
+    }
+
+    public void setCurrentPageId(int currentPageId) {
+        this.currentPageId = currentPageId;
+    }
+
+    public void setMaxPageId(int maxPageId) {
+        this.maxPageId = maxPageId;
+    }
+
+    @Override
+    public boolean exclusiveLatchNodes() {
+        return false;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/DoubleArrayList.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/DoubleArrayList.java
new file mode 100644
index 0000000..318a102
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/DoubleArrayList.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.ophelpers;
+
+public class DoubleArrayList {
+    private double[] data;
+    private int size;
+    private int first;
+    private final int growth;
+
+    public DoubleArrayList(int initialCapacity, int growth) {
+        data = new double[initialCapacity];
+        size = 0;
+        first = 0;
+        this.growth = growth;
+    }
+
+    public int size() {
+        return size;
+    }
+
+    public int first() {
+        return first;
+    }
+
+    public void add(double i) {
+        if (size == data.length) {
+            double[] newData = new double[data.length + growth];
+            System.arraycopy(data, 0, newData, 0, data.length);
+            data = newData;
+        }
+
+        data[size++] = i;
+    }
+
+    public void addFirst(double i) {
+        double[] newData = new double[data.length + 1];
+        System.arraycopy(data, 0, newData, 0, first);
+        System.arraycopy(data, first, newData, first + 1, size - first);
+        data = newData;
+        data[first] = i;
+        size++;
+    }
+
+    public void removeLast() {
+        if (size > 0)
+            size--;
+    }
+
+    // WARNING: caller is responsible for checking size > 0
+    public double getLast() {
+        return data[size - 1];
+    }
+
+    public double get(int i) {
+        return data[i];
+    }
+
+    // WARNING: caller is responsible for checking i < size
+    public void set(int i, int value) {
+        data[i] = value;
+
+    }
+
+    public double getFirst() {
+        return data[first];
+    }
+
+    public void moveFirst() {
+        first++;
+    }
+
+    public void clear() {
+        size = 0;
+        first = 0;
+    }
+
+    public boolean isLast() {
+        return size == first;
+    }
+
+    public boolean isEmpty() {
+        return size == 0;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/FieldLengthIgnoringMultiComparator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/FieldLengthIgnoringMultiComparator.java
new file mode 100644
index 0000000..4e43a34
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/FieldLengthIgnoringMultiComparator.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.ophelpers;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+
+/**
+ * MultiComparator that always passes 0 as a tuple's field length. This may speed up comparisons.
+ */
+public class FieldLengthIgnoringMultiComparator extends MultiComparator {
+
+    public FieldLengthIgnoringMultiComparator(IBinaryComparator[] cmps) {
+        super(cmps);
+    }
+
+    @Override
+    public int compare(ITupleReference tupleA, ITupleReference tupleB) {
+        for (int i = 0; i < cmps.length; i++) {
+            int cmp = cmps[i].compare(tupleA.getFieldData(i), tupleA.getFieldStart(i), 0, tupleB.getFieldData(i),
+                    tupleB.getFieldStart(i), 0);
+            if (cmp != 0) {
+                return cmp;
+            }
+        }
+        return 0;
+    }
+
+    @Override
+    public int selectiveFieldCompare(ITupleReference tupleA, ITupleReference tupleB, int[] fields) {
+        for (int j = 0; j < cmps.length; j++) {
+            int i = fields[j];
+            int cmp = cmps[j].compare(tupleA.getFieldData(i), tupleA.getFieldStart(i), 0, tupleB.getFieldData(i),
+                    tupleB.getFieldStart(i), 0);
+            if (cmp != 0) {
+                return cmp;
+            }
+        }
+        return 0;
+    }
+
+    @Override
+    public int compare(ITupleReference tupleA, ITupleReference tupleB, int startFieldIndex) {
+        for (int i = 0; i < cmps.length; i++) {
+            int ix = startFieldIndex + i;
+            int cmp = cmps[i].compare(tupleA.getFieldData(ix), tupleA.getFieldStart(ix), 0, tupleB.getFieldData(ix),
+                    tupleB.getFieldStart(ix), 0);
+            if (cmp != 0) {
+                return cmp;
+            }
+        }
+        return 0;
+    }
+
+    @Override
+    public int fieldRangeCompare(ITupleReference tupleA, ITupleReference tupleB, int startFieldIndex, int numFields) {
+        for (int i = startFieldIndex; i < startFieldIndex + numFields; i++) {
+            int cmp = cmps[i].compare(tupleA.getFieldData(i), tupleA.getFieldStart(i), 0, tupleB.getFieldData(i),
+                    tupleB.getFieldStart(i), 0);
+            if (cmp != 0) {
+                return cmp;
+            }
+        }
+        return 0;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/FieldLengthIgnoringSingleComparator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/FieldLengthIgnoringSingleComparator.java
new file mode 100644
index 0000000..d35297a
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/FieldLengthIgnoringSingleComparator.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.ophelpers;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+
+/**
+ * MultiComparator optimized for the special case where there is only a single comparator.
+ * Further speeds up comparisons by always passing 0 as the field's length.
+ */
+public class FieldLengthIgnoringSingleComparator extends MultiComparator {
+    private final IBinaryComparator cmp;
+
+    protected FieldLengthIgnoringSingleComparator(IBinaryComparator[] cmps) {
+        super(cmps);
+        this.cmp = cmps[0];
+    }
+
+    public int compare(ITupleReference tupleA, ITupleReference tupleB) {
+        return cmp.compare(tupleA.getFieldData(0), tupleA.getFieldStart(0), 0, tupleB.getFieldData(0),
+                tupleB.getFieldStart(0), 0);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/IndexOperation.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/IndexOperation.java
new file mode 100644
index 0000000..1885348
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/IndexOperation.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.ophelpers;
+
+public enum IndexOperation {
+    INSERT,
+    DELETE,
+    UPDATE,
+    UPSERT,
+    SEARCH,
+    DISKORDERSCAN,
+    PHYSICALDELETE,
+    NOOP,
+    MERGE,
+    FLUSH
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/MultiComparator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/MultiComparator.java
index c653c9a..567973d 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/MultiComparator.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/MultiComparator.java
@@ -21,70 +21,131 @@
 
 public class MultiComparator {
 
-	private final IBinaryComparator[] cmps;
+    protected final IBinaryComparator[] cmps;
 
-	public MultiComparator(IBinaryComparator[] cmps) {
-		this.cmps = cmps;
-	}
+    public MultiComparator(IBinaryComparator[] cmps) {
+        this.cmps = cmps;
+    }
 
-	public int compare(ITupleReference tupleA, ITupleReference tupleB) {
-		for (int i = 0; i < cmps.length; i++) {
-			int cmp = cmps[i].compare(tupleA.getFieldData(i),
-					tupleA.getFieldStart(i), tupleA.getFieldLength(i),
-					tupleB.getFieldData(i), tupleB.getFieldStart(i),
-					tupleB.getFieldLength(i));
-			if (cmp < 0)
-				return -1;
-			else if (cmp > 0)
-				return 1;
-		}
-		return 0;
-	}
+    public int compare(ITupleReference tupleA, ITupleReference tupleB) {
+        for (int i = 0; i < cmps.length; i++) {
+            int cmp = cmps[i].compare(tupleA.getFieldData(i), tupleA.getFieldStart(i), tupleA.getFieldLength(i),
+                    tupleB.getFieldData(i), tupleB.getFieldStart(i), tupleB.getFieldLength(i));
+            if (cmp != 0) {
+                return cmp;
+            }
+        }
+        return 0;
+    }
 
-	public int fieldRangeCompare(ITupleReference tupleA,
-			ITupleReference tupleB, int startFieldIndex, int numFields) {
-		for (int i = startFieldIndex; i < startFieldIndex + numFields; i++) {
-			int cmp = cmps[i].compare(tupleA.getFieldData(i),
-					tupleA.getFieldStart(i), tupleA.getFieldLength(i),
-					tupleB.getFieldData(i), tupleB.getFieldStart(i),
-					tupleB.getFieldLength(i));
-			if (cmp < 0)
-				return -1;
-			else if (cmp > 0)
-				return 1;
-		}
-		return 0;
-	}
-	
-	public int compare(ITupleReference tupleA,
-			ITupleReference tupleB, int startFieldIndex) {
-		for (int i = 0; i < cmps.length; i++) {
-			int ix = startFieldIndex + i;
-			int cmp = cmps[i].compare(tupleA.getFieldData(ix),
-					tupleA.getFieldStart(ix), tupleA.getFieldLength(ix),
-					tupleB.getFieldData(ix), tupleB.getFieldStart(ix),
-					tupleB.getFieldLength(ix));
-			if (cmp < 0)
-				return -1;
-			else if (cmp > 0)
-				return 1;
-		}
-		return 0;
-	}
+    public int selectiveFieldCompare(ITupleReference tupleA, ITupleReference tupleB, int[] fields) {
+        for (int j = 0; j < cmps.length; j++) {
+            int i = fields[j];
+            int cmp = cmps[j].compare(tupleA.getFieldData(i), tupleA.getFieldStart(i), tupleA.getFieldLength(i),
+                    tupleB.getFieldData(i), tupleB.getFieldStart(i), tupleB.getFieldLength(i));
+            if (cmp != 0) {
+                return cmp;
+            }
+        }
+        return 0;
+    }
 
-	public IBinaryComparator[] getComparators() {
-		return cmps;
-	}
+    public int compare(ITupleReference tupleA, ITupleReference tupleB, int startFieldIndex) {
+        for (int i = 0; i < cmps.length; i++) {
+            int ix = startFieldIndex + i;
+            int cmp = cmps[i].compare(tupleA.getFieldData(ix), tupleA.getFieldStart(ix), tupleA.getFieldLength(ix),
+                    tupleB.getFieldData(ix), tupleB.getFieldStart(ix), tupleB.getFieldLength(ix));
+            if (cmp != 0) {
+                return cmp;
+            }
+        }
+        return 0;
+    }
+
+    public int fieldRangeCompare(ITupleReference tupleA, ITupleReference tupleB, int startFieldIndex, int numFields) {
+        for (int i = startFieldIndex; i < startFieldIndex + numFields; i++) {
+            int cmp = cmps[i].compare(tupleA.getFieldData(i), tupleA.getFieldStart(i), tupleA.getFieldLength(i),
+                    tupleB.getFieldData(i), tupleB.getFieldStart(i), tupleB.getFieldLength(i));
+            if (cmp != 0) {
+                return cmp;
+            }
+        }
+        return 0;
+    }
+
+    public IBinaryComparator[] getComparators() {
+        return cmps;
+    }
 
     public int getKeyFieldCount() {
-		return cmps.length;
-	}
-    
+        return cmps.length;
+    }
+
     public static MultiComparator create(IBinaryComparatorFactory[] cmpFactories) {
         IBinaryComparator[] cmps = new IBinaryComparator[cmpFactories.length];
         for (int i = 0; i < cmpFactories.length; i++) {
             cmps[i] = cmpFactories[i].createBinaryComparator();
         }
-        return new MultiComparator(cmps);
+        if (cmps.length == 1) {
+            return new SingleComparator(cmps);
+        } else {
+            return new MultiComparator(cmps);
+        }
+    }
+
+    public static MultiComparator createIgnoreFieldLength(IBinaryComparatorFactory[] cmpFactories) {
+        IBinaryComparator[] cmps = new IBinaryComparator[cmpFactories.length];
+        for (int i = 0; i < cmpFactories.length; i++) {
+            cmps[i] = cmpFactories[i].createBinaryComparator();
+        }
+        if (cmps.length == 1) {
+            return new FieldLengthIgnoringSingleComparator(cmps);
+        } else {
+            return new FieldLengthIgnoringMultiComparator(cmps);
+        }
+    }
+
+    public static MultiComparator createIgnoreFieldLength(IBinaryComparatorFactory[] cmpFactories, int startIndex,
+            int numCmps) {
+        IBinaryComparator[] cmps = new IBinaryComparator[numCmps];
+        for (int i = startIndex; i < startIndex + numCmps; i++) {
+            cmps[i] = cmpFactories[i].createBinaryComparator();
+        }
+        if (cmps.length == 1) {
+            return new FieldLengthIgnoringSingleComparator(cmps);
+        } else {
+            return new FieldLengthIgnoringMultiComparator(cmps);
+        }
+    }
+
+    public static MultiComparator create(IBinaryComparatorFactory[] cmpFactories, int startIndex, int numCmps) {
+        IBinaryComparator[] cmps = new IBinaryComparator[numCmps];
+        for (int i = startIndex; i < startIndex + numCmps; i++) {
+            cmps[i] = cmpFactories[i].createBinaryComparator();
+        }
+        if (cmps.length == 1) {
+            return new SingleComparator(cmps);
+        } else {
+            return new MultiComparator(cmps);
+        }
+    }
+
+    public static MultiComparator create(IBinaryComparatorFactory[]... cmpFactories) {
+        int size = 0;
+        for (int i = 0; i < cmpFactories.length; i++) {
+            size += cmpFactories[i].length;
+        }
+        IBinaryComparator[] cmps = new IBinaryComparator[size];
+        int x = 0;
+        for (int i = 0; i < cmpFactories.length; i++) {
+            for (int j = 0; j < cmpFactories[i].length; j++) {
+                cmps[x++] = cmpFactories[i][j].createBinaryComparator();
+            }
+        }
+        if (cmps.length == 1) {
+            return new SingleComparator(cmps);
+        } else {
+            return new MultiComparator(cmps);
+        }
     }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/SingleComparator.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/SingleComparator.java
new file mode 100644
index 0000000..c8841f3
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/ophelpers/SingleComparator.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.ophelpers;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+
+/**
+ * MultiComparator optimized for the special case where there is only a single comparator.
+ */
+public class SingleComparator extends MultiComparator {
+
+    private final IBinaryComparator cmp;
+
+    protected SingleComparator(IBinaryComparator[] cmps) {
+        super(cmps);
+        this.cmp = cmps[0];
+    }
+
+    public int compare(ITupleReference tupleA, ITupleReference tupleB) {
+        return cmp.compare(tupleA.getFieldData(0), tupleA.getFieldStart(0), tupleA.getFieldLength(0),
+                tupleB.getFieldData(0), tupleB.getFieldStart(0), tupleB.getFieldLength(0));
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/ConcatenatingTupleReference.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/ConcatenatingTupleReference.java
new file mode 100644
index 0000000..c5662b1
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/ConcatenatingTupleReference.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.tuples;
+
+import java.util.Arrays;
+
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+
+/**
+ * WARNING: getFieldData(), getFieldStart() and getFieldLength() are log and not constant time.
+ */
+public class ConcatenatingTupleReference implements ITupleReference {
+
+    private final ITupleReference[] tuples;
+    private final int[] fieldCounts;
+    private int numTuples;
+    private int totalFieldCount;
+    
+    public ConcatenatingTupleReference(int maxTuples) {
+        tuples = new ITupleReference[maxTuples];
+        fieldCounts = new int[maxTuples];
+        reset();        
+    }
+    
+    public void reset() {
+        numTuples = 0;
+        totalFieldCount = 0;
+    }
+    
+    public void addTuple(ITupleReference tuple) {
+        tuples[numTuples] = tuple;
+        totalFieldCount += tuple.getFieldCount();
+        if (numTuples > 0) {
+            fieldCounts[numTuples] = fieldCounts[numTuples - 1] + tuple.getFieldCount();
+        } else {
+            fieldCounts[numTuples] = tuple.getFieldCount();
+        }
+        ++numTuples;
+    }
+    
+    public void removeLastTuple() {
+        if (numTuples > 0) {
+            ITupleReference lastTuple = tuples[--numTuples];
+            totalFieldCount -= lastTuple.getFieldCount();
+        }
+    }
+    
+    public int getNumTuples() {
+        return numTuples;
+    }
+    
+    public boolean hasMaxTuples() {
+        return numTuples == tuples.length;
+    }
+    
+    @Override
+    public int getFieldCount() {
+        return totalFieldCount;
+    }
+
+    @Override
+    public byte[] getFieldData(int fIdx) {
+        int tupleIndex = getTupleIndex(fIdx);
+        int fieldIndex = getFieldIndex(tupleIndex, fIdx);
+        return tuples[tupleIndex].getFieldData(fieldIndex);
+    }
+
+    @Override
+    public int getFieldStart(int fIdx) {
+        int tupleIndex = getTupleIndex(fIdx);
+        int fieldIndex = getFieldIndex(tupleIndex, fIdx);
+        return tuples[tupleIndex].getFieldStart(fieldIndex);
+    }
+
+    @Override
+    public int getFieldLength(int fIdx) {
+        int tupleIndex = getTupleIndex(fIdx);
+        int fieldIndex = getFieldIndex(tupleIndex, fIdx);
+        return tuples[tupleIndex].getFieldLength(fieldIndex);
+    }
+    
+    private int getTupleIndex(int fIdx) {
+        int tupleIndex = Arrays.binarySearch(fieldCounts, 0, numTuples - 1, fIdx);
+        if (tupleIndex < 0) {
+            tupleIndex = -tupleIndex - 1;
+        } else {
+            ++tupleIndex;
+        }
+        return tupleIndex;
+    }
+    
+    private int getFieldIndex(int tupleIndex, int fIdx) {
+        int fieldIndex = -1;
+        if (tupleIndex > 0) {
+            fieldIndex = fIdx - fieldCounts[tupleIndex - 1]; 
+        } else {
+            fieldIndex = fIdx;
+        }
+        return fieldIndex;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/PermutingFrameTupleReference.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/PermutingFrameTupleReference.java
new file mode 100644
index 0000000..5f97f04
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/PermutingFrameTupleReference.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.tuples;
+
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class PermutingFrameTupleReference implements IFrameTupleReference {
+	private IFrameTupleAccessor fta;
+	private int tIndex;
+	private int[] fieldPermutation;
+
+	public void setFieldPermutation(int[] fieldPermutation) {
+		this.fieldPermutation = fieldPermutation;
+	}
+
+	public void reset(IFrameTupleAccessor fta, int tIndex) {
+		this.fta = fta;
+		this.tIndex = tIndex;
+	}
+
+	@Override
+	public IFrameTupleAccessor getFrameTupleAccessor() {
+		return fta;
+	}
+
+	@Override
+	public int getTupleIndex() {
+		return tIndex;
+	}
+
+	@Override
+	public int getFieldCount() {
+		return fieldPermutation.length;
+	}
+
+	@Override
+	public byte[] getFieldData(int fIdx) {
+		return fta.getBuffer().array();
+	}
+
+	@Override
+	public int getFieldStart(int fIdx) {
+		return fta.getTupleStartOffset(tIndex) + fta.getFieldSlotsLength()
+				+ fta.getFieldStartOffset(tIndex, fieldPermutation[fIdx]);
+	}
+
+	@Override
+	public int getFieldLength(int fIdx) {
+		return fta.getFieldLength(tIndex, fieldPermutation[fIdx]);
+	}
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/PermutingTupleReference.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/PermutingTupleReference.java
new file mode 100644
index 0000000..0272ff6
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/PermutingTupleReference.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.tuples;
+
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+
+public class PermutingTupleReference implements ITupleReference {
+
+    private final int[] fieldPermutation;
+    private ITupleReference sourceTuple;
+    
+    public PermutingTupleReference(int[] fieldPermutation) {
+        this.fieldPermutation = fieldPermutation;
+    }
+    
+    public void reset(ITupleReference sourceTuple) {
+        this.sourceTuple = sourceTuple;
+    }
+
+    @Override
+    public int getFieldCount() {
+        return fieldPermutation.length;
+    }
+
+    @Override
+    public byte[] getFieldData(int fIdx) {
+        return sourceTuple.getFieldData(fieldPermutation[fIdx]);
+    }
+
+    @Override
+    public int getFieldStart(int fIdx) {
+        return sourceTuple.getFieldStart(fieldPermutation[fIdx]);
+    }
+
+    @Override
+    public int getFieldLength(int fIdx) {
+        return sourceTuple.getFieldLength(fieldPermutation[fIdx]);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/SimpleTupleWriter.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/SimpleTupleWriter.java
index f5ec5f3..8c41dd3 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/SimpleTupleWriter.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/SimpleTupleWriter.java
@@ -23,12 +23,12 @@
 
 public class SimpleTupleWriter implements ITreeIndexTupleWriter {
 
-	// Write short in little endian to target byte array at given offset.
-	private static void writeShortL(short s, byte[] buf, int targetOff) {
-		buf[targetOff] = (byte)(s >> 8);
-		buf[targetOff + 1] = (byte)(s >> 0);
-	}
-	
+    // Write short in little endian to target byte array at given offset.
+    private static void writeShortL(short s, byte[] buf, int targetOff) {
+        buf[targetOff] = (byte) (s >> 8);
+        buf[targetOff + 1] = (byte) (s >> 0);
+    }
+
     @Override
     public int bytesRequired(ITupleReference tuple) {
         int bytes = getNullFlagsBytes(tuple) + getFieldSlotsBytes(tuple);
@@ -56,10 +56,10 @@
     public int writeTuple(ITupleReference tuple, ByteBuffer targetBuf, int targetOff) {
         return writeTuple(tuple, targetBuf.array(), targetOff);
     }
-    
+
     @Override
-	public int writeTuple(ITupleReference tuple, byte[] targetBuf, int targetOff) {
-    	int runner = targetOff;
+    public int writeTuple(ITupleReference tuple, byte[] targetBuf, int targetOff) {
+        int runner = targetOff;
         int nullFlagsBytes = getNullFlagsBytes(tuple);
         int fieldSlotsBytes = getFieldSlotsBytes(tuple);
         for (int i = 0; i < nullFlagsBytes; i++) {
@@ -68,18 +68,16 @@
         runner += fieldSlotsBytes;
         int fieldEndOff = 0;
         for (int i = 0; i < tuple.getFieldCount(); i++) {
-            System.arraycopy(tuple.getFieldData(i), tuple.getFieldStart(i), targetBuf, runner,
-                    tuple.getFieldLength(i));
+            System.arraycopy(tuple.getFieldData(i), tuple.getFieldStart(i), targetBuf, runner, tuple.getFieldLength(i));
             fieldEndOff += tuple.getFieldLength(i);
             runner += tuple.getFieldLength(i);
             writeShortL((short) fieldEndOff, targetBuf, targetOff + nullFlagsBytes + i * 2);
         }
         return runner - targetOff;
-	}
+    }
 
     @Override
-    public int writeTupleFields(ITupleReference tuple, int startField, int numFields, byte[] targetBuf,
-            int targetOff) {
+    public int writeTupleFields(ITupleReference tuple, int startField, int numFields, byte[] targetBuf, int targetOff) {
         int runner = targetOff;
         int nullFlagsBytes = getNullFlagsBytes(tuple, startField, numFields);
         for (int i = 0; i < nullFlagsBytes; i++) {
@@ -90,10 +88,9 @@
         int fieldEndOff = 0;
         int fieldCounter = 0;
         for (int i = startField; i < startField + numFields; i++) {
-            System.arraycopy(tuple.getFieldData(i), tuple.getFieldStart(i), targetBuf, runner,
-                    tuple.getFieldLength(i));
+            System.arraycopy(tuple.getFieldData(i), tuple.getFieldStart(i), targetBuf, runner, tuple.getFieldLength(i));
             fieldEndOff += tuple.getFieldLength(i);
-            runner += tuple.getFieldLength(i);            
+            runner += tuple.getFieldLength(i);
             writeShortL((short) fieldEndOff, targetBuf, targetOff + nullFlagsBytes + fieldCounter * 2);
             fieldCounter++;
         }
@@ -115,5 +112,10 @@
 
     protected int getFieldSlotsBytes(ITupleReference tuple, int startField, int numFields) {
         return numFields * 2;
-    }	
+    }
+
+    @Override
+    public int getCopySpaceRequired(ITupleReference tuple) {
+        return bytesRequired(tuple);
+    }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/TypeAwareTupleWriter.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/TypeAwareTupleWriter.java
index 9730346..1e12bea 100644
--- a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/TypeAwareTupleWriter.java
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/tuples/TypeAwareTupleWriter.java
@@ -87,8 +87,7 @@
     }
 
     @Override
-    public int writeTupleFields(ITupleReference tuple, int startField, int numFields, byte[] targetBuf,
-            int targetOff) {
+    public int writeTupleFields(ITupleReference tuple, int startField, int numFields, byte[] targetBuf, int targetOff) {
         int runner = targetOff;
         int nullFlagsBytes = getNullFlagsBytes(numFields);
         // write null indicator bits
@@ -106,8 +105,7 @@
         runner = encDec.getPos();
 
         for (int i = startField; i < startField + numFields; i++) {
-            System.arraycopy(tuple.getFieldData(i), tuple.getFieldStart(i), targetBuf, runner,
-                    tuple.getFieldLength(i));
+            System.arraycopy(tuple.getFieldData(i), tuple.getFieldStart(i), targetBuf, runner, tuple.getFieldLength(i));
             runner += tuple.getFieldLength(i);
         }
 
@@ -149,4 +147,9 @@
     public void setTypeTraits(ITypeTraits[] typeTraits) {
         this.typeTraits = typeTraits;
     }
+
+    @Override
+    public int getCopySpaceRequired(ITupleReference tuple) {
+        return bytesRequired(tuple);
+    }
 }
diff --git a/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/util/HashMultiSet.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/util/HashMultiSet.java
new file mode 100644
index 0000000..e4ccdcb
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/util/HashMultiSet.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common.util;
+
+import java.util.AbstractCollection;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Quick and dirty implementation of a HashMultiSet backed by a HashMap.
+ * It only implements a minimal subset of the collection interface to make our tests work.
+ */
+public class HashMultiSet<E> extends AbstractCollection<E> {
+
+    private final Map<E, List<E>> map = new HashMap<E, List<E>>(); 
+    private int size = 0;
+    
+    @Override
+    public boolean add(E e) {
+        List<E> list = map.get(e);
+        if (list == null) {
+            list = new ArrayList<E>();
+            map.put(e, list);
+        }
+        list.add(e);
+        size++;
+        return true;
+    }
+    
+    @Override
+    public boolean contains(Object o) {
+        return map.containsKey(o);
+    }
+    
+    @Override
+    public boolean remove(Object o) {
+        List<E> list = map.get(o);
+        if (list == null) {
+            return false;            
+        }
+        list.remove(list.size() - 1);
+        if (list.isEmpty()) {
+            map.remove(o);
+        }
+        size--;
+        return true;
+    }
+    
+    @Override
+    public Iterator<E> iterator() {
+        return new HashMultiSetIterator();
+    }
+
+    @Override
+    public int size() {
+        return size;
+    }
+    
+    @Override
+    public void clear() {
+        map.clear();
+        size = 0;
+    }
+    
+    private class HashMultiSetIterator implements Iterator<E> {
+
+        private Iterator<Map.Entry<E, List<E>>> mapIter;
+        private Iterator<E> listIter;
+        
+        public HashMultiSetIterator() {
+            mapIter = map.entrySet().iterator();
+        }
+        
+        @Override
+        public boolean hasNext() {
+            if (mapIter.hasNext() || (listIter != null && listIter.hasNext())) {
+                return true;
+            }
+            return false;
+        }
+
+        @Override
+        public E next() {
+            if (listIter == null || (listIter != null && !listIter.hasNext())) {
+                Map.Entry<E, List<E>> entry = mapIter.next();
+                listIter = entry.getValue().iterator();
+                return listIter.next();
+            }
+            return listIter.next();
+        }
+
+        @Override
+        public void remove() {
+            throw new IllegalStateException("Not implemented");
+        }
+    }
+}
diff --git a/hyracks/hyracks-storage-am-common/src/main/resources/dist.all.first.cleaned b/hyracks/hyracks-storage-am-common/src/main/resources/dist.all.first.cleaned
new file mode 100755
index 0000000..de64afa
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/resources/dist.all.first.cleaned
@@ -0,0 +1,5494 @@
+Mary 
+Patricia 
+Linda 
+Barbara 
+Elizabeth 
+Jennifer 
+Maria 
+Susan 
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+Lisa 
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diff --git a/hyracks/hyracks-storage-am-common/src/main/resources/dist.all.last.cleaned b/hyracks/hyracks-storage-am-common/src/main/resources/dist.all.last.cleaned
new file mode 100755
index 0000000..c9ec798
--- /dev/null
+++ b/hyracks/hyracks-storage-am-common/src/main/resources/dist.all.last.cleaned
@@ -0,0 +1,88799 @@
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+Andreola
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+Andoh
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+Anderst
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+Amburgy
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+Ambrister
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+Amboise
+Ambert
+Ambagis
+Amauty
+Amat
+Amas
+Amarian
+Amara
+Amalong
+Alwin
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+Allanson
+Allabaugh
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+Alkema
+Alkana
+Aljemal
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+Alimo
+Alimento
+Alie
+Alicer
+Alias
+Alhusseini
+Alhameed
+Alhambra
+Alhaddad
+Alfredo
+Alfiero
+Aleyandrez
+Alexidor
+Alexandropoul
+Alexanders
+Alexakis
+Alesse
+Alesna
+Alepin
+Alejandrez
+Aldworth
+Aldrow
+Aldrige
+Aldonza
+Alcine
+Alcantas
+Albu
+Albrough
+Albor
+Albe
+Albarracin
+Albarazi
+Alatosse
+Alarcone
+Alanko
+Aland
+Alamia
+Alameida
+Alambar
+Alai
+Akwei
+Aksoy
+Ako
+Akley
+Akinrefon
+Akimseu
+Akhavan
+Akhand
+Akery
+Akawanzie
+Akapo
+Akamiro
+Akal
+Ajoku
+Ajani
+Aiuto
+Aiudi
+Airth
+Aipperspach
+Aiporlani
+Aipopo
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+Ailsworth
+Aills
+Ailiff
+Aievoli
+Aid
+Aiava
+Ahyet
+Ahrenholz
+Ahnell
+Ahlo
+Ahlfield
+Ahlemeyer
+Ahimud
+Ahia
+Ahhee
+Ahaus
+Ahalt
+Agustino
+Agustine
+Agurs
+Agumga
+Aguele
+Agresto
+Agreda
+Agpaoa
+Agosti
+Agoro
+Agonoy
+Agoff
+Aggers
+Agemy
+Ageboi
+Agbisit
+Afurong
+Afshar
+Affronti
+Afflick
+Affeltranger
+Afable
+Aeillo
+Adule
+Adrion
+Adolphe
+Adolfson
+Adner
+Adloff
+Adling
+Adickes
+Adib
+Adelsperger
+Adelmund
+Adelizzi
+Addeo
+Adamsonis
+Adamsen
+Adamowski
+Adamos
+Adamec
+Adalja
+Acosto
+Acors
+Acorda
+Acock
+Acly
+Ackah
+Achin
+Aceveda
+Acerra
+Acerno
+Aceituno
+Acee
+Accala
+Acal
+Abusufait
+Abugn
+Abuel
+Absalon
+Abriola
+Abrey
+Abrell
+Abramovitz
+Abramoff
+Abramian
+Abrahamian
+Abousaleh
+Aboshihata
+Abolafia
+Ableman
+Abkemeier
+Abington
+Abina
+Abigantus
+Abide
+Abeta
+Abercombie
+Abdulmuniem
+Abdulaziz
+Abdou
+Abdelmuti
+Abdelaziz
+Abdelal
+Abbington
+Abbatiello
+Abajian
+Abaja
+Aarsvold
+Aarhus
+Aardema
+Aarant
+Aanderud
+Aalund
+Aalderink
diff --git a/hyracks/hyracks-storage-am-invertedindex/pom.xml b/hyracks/hyracks-storage-am-invertedindex/pom.xml
deleted file mode 100644
index 8fc8855..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/pom.xml
+++ /dev/null
@@ -1,65 +0,0 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks</groupId>
-  <artifactId>hyracks-storage-am-invertedindex</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
-  <name>hyracks-storage-am-invertedindex</name>
-
-  <parent>
-    <groupId>edu.uci.ics.hyracks</groupId>
-    <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
-  </parent>
-
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>2.0.2</version>
-        <configuration>
-          <source>1.7</source>
-          <target>1.7</target>
-          <fork>true</fork>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-  <dependencies>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-storage-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>compile</scope>
-  	</dependency>  	
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>compile</scope>
-  	</dependency>  	
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>compile</scope>
-  	</dependency>  	
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>compile</scope>
-  	</dependency>    
-  	<dependency>
-  		<groupId>junit</groupId>
-  		<artifactId>junit</artifactId>
-  		<version>4.8.1</version>
-  		<type>jar</type>
-  		<scope>test</scope>
-  	</dependency>  	  		
-  </dependencies>
-</project>
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedIndexOperatorDescriptor.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedIndexOperatorDescriptor.java
deleted file mode 100644
index 042042f..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedIndexOperatorDescriptor.java
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.api;
-
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.ITreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizerFactory;
-
-public interface IInvertedIndexOperatorDescriptor extends ITreeIndexOperatorDescriptor {
-    public IBinaryComparatorFactory[] getInvListsComparatorFactories();
-
-    public IBinaryTokenizerFactory getTokenizerFactory();
-    
-    public ITypeTraits[] getInvListsTypeTraits();
-    
-    public IFileSplitProvider getInvListsFileSplitProvider();
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedIndexSearchModifier.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedIndexSearchModifier.java
deleted file mode 100644
index bd96f67..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedIndexSearchModifier.java
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.api;
-
-import java.util.List;
-
-public interface IInvertedIndexSearchModifier {
-    public int getOccurrenceThreshold(List<IInvertedListCursor> invListCursors);
-
-    public int getPrefixLists(List<IInvertedListCursor> invListCursors);
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedIndexSearchModifierFactory.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedIndexSearchModifierFactory.java
deleted file mode 100644
index 92770d6..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedIndexSearchModifierFactory.java
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.api;
-
-import java.io.Serializable;
-
-public interface IInvertedIndexSearchModifierFactory extends Serializable {
-    public IInvertedIndexSearchModifier createSearchModifier();
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedIndexSearcher.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedIndexSearcher.java
deleted file mode 100644
index d633c34..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedIndexSearcher.java
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.api;
-
-import java.nio.ByteBuffer;
-import java.util.List;
-
-import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.InvertedIndexSearchCursor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.InvertedIndexSearchPredicate;
-
-public interface IInvertedIndexSearcher {
-    public void search(InvertedIndexSearchCursor resultCursor, InvertedIndexSearchPredicate searchPred)
-            throws HyracksDataException, IndexException;
-
-    public IFrameTupleAccessor createResultFrameTupleAccessor();
-
-    public ITupleReference createResultTupleReference();
-
-    public List<ByteBuffer> getResultBuffers();
-
-    public int getNumValidResultBuffers();
-    
-    public void reset();
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedListBuilder.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedListBuilder.java
deleted file mode 100644
index aaaef56..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedListBuilder.java
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.api;
-
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-
-public interface IInvertedListBuilder {
-    public boolean startNewList(ITupleReference tuple, int numTokenFields);
-
-    // returns true if successfully appended
-    // returns false if not enough space in targetBuf
-    public boolean appendElement(ITupleReference tuple, int numTokenFields, int numElementFields);
-
-    public void setTargetBuffer(byte[] targetBuf, int startPos);
-
-    public int getListSize();
-
-    public int getPos();
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedListCursor.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedListCursor.java
deleted file mode 100644
index 9435f3c..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/api/IInvertedListCursor.java
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.api;
-
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
-
-public interface IInvertedListCursor extends Comparable<IInvertedListCursor> {
-    void reset(int startPageId, int endPageId, int startOff, int numElements);
-
-    void pinPagesSync() throws HyracksDataException;
-
-    void pinPagesAsync() throws HyracksDataException;
-
-    void unpinPages() throws HyracksDataException;
-
-    boolean hasNext();
-
-    void next();
-
-    ITupleReference getTuple();
-
-    // getters
-    int getNumElements();
-
-    int getStartPageId();
-
-    int getEndPageId();
-
-    int getStartOff();
-
-    // jump to a specific element
-    void positionCursor(int elementIx);
-
-    boolean containsKey(ITupleReference searchTuple, MultiComparator invListCmp);
-
-    // for debugging
-    String printInvList(ISerializerDeserializer[] serdes) throws HyracksDataException;
-
-    String printCurrentElement(ISerializerDeserializer[] serdes) throws HyracksDataException;
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/AbstractInvertedIndexOperatorDescriptor.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/AbstractInvertedIndexOperatorDescriptor.java
deleted file mode 100644
index 117f96f..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/AbstractInvertedIndexOperatorDescriptor.java
+++ /dev/null
@@ -1,168 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.dataflow;
-
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
-import edu.uci.ics.hyracks.dataflow.std.base.AbstractSingleActivityOperatorDescriptor;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMInteriorFrameFactory;
-import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMLeafFrameFactory;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleWriterFactory;
-import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizerFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.util.InvertedIndexUtils;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-
-public abstract class AbstractInvertedIndexOperatorDescriptor extends AbstractSingleActivityOperatorDescriptor
-        implements IInvertedIndexOperatorDescriptor {
-
-    private static final long serialVersionUID = 1L;
-
-    // General.
-    protected final IStorageManagerInterface storageManager;
-    protected final IIndexRegistryProvider<IIndex> indexRegistryProvider;
-    protected final boolean retainInput;
-    protected final IOperationCallbackProvider opCallbackProvider;
-    
-    // Btree.
-    protected final ITreeIndexFrameFactory btreeInteriorFrameFactory;
-    protected final ITreeIndexFrameFactory btreeLeafFrameFactory;
-    protected final ITypeTraits[] btreeTypeTraits;
-    protected final IBinaryComparatorFactory[] btreeComparatorFactories;
-    protected final IIndexDataflowHelperFactory btreeDataflowHelperFactory;
-    protected final IFileSplitProvider btreeFileSplitProvider;
-
-    // Inverted index.
-    protected final ITypeTraits[] invListsTypeTraits;
-    protected final IBinaryComparatorFactory[] invListComparatorFactories;
-    protected final IBinaryTokenizerFactory tokenizerFactory;
-    protected final IFileSplitProvider invListsFileSplitProvider;
-
-    public AbstractInvertedIndexOperatorDescriptor(IOperatorDescriptorRegistry spec, int inputArity, int outputArity,
-            RecordDescriptor recDesc, IStorageManagerInterface storageManager,
-            IFileSplitProvider btreeFileSplitProvider, IFileSplitProvider invListsFileSplitProvider,
-            IIndexRegistryProvider<IIndex> indexRegistryProvider, ITypeTraits[] tokenTypeTraits,
-            IBinaryComparatorFactory[] tokenComparatorFactories, ITypeTraits[] invListsTypeTraits,
-            IBinaryComparatorFactory[] invListComparatorFactories, IBinaryTokenizerFactory tokenizerFactory,
-            IIndexDataflowHelperFactory btreeDataflowHelperFactory, boolean retainInput, IOperationCallbackProvider opCallbackProvider) {
-        super(spec, inputArity, outputArity);
-
-        // General.
-        this.storageManager = storageManager;
-        this.indexRegistryProvider = indexRegistryProvider;
-        this.retainInput = retainInput;
-        this.opCallbackProvider = opCallbackProvider;
-        
-        // Btree.
-        this.btreeTypeTraits = InvertedIndexUtils.getBTreeTypeTraits(tokenTypeTraits);
-        ITreeIndexTupleWriterFactory tupleWriterFactory = new TypeAwareTupleWriterFactory(btreeTypeTraits);
-        this.btreeInteriorFrameFactory = new BTreeNSMInteriorFrameFactory(tupleWriterFactory);
-        this.btreeLeafFrameFactory = new BTreeNSMLeafFrameFactory(tupleWriterFactory);
-        this.btreeComparatorFactories = tokenComparatorFactories;
-        this.btreeDataflowHelperFactory = btreeDataflowHelperFactory;
-        this.btreeFileSplitProvider = btreeFileSplitProvider;
-
-        // Inverted index.
-        this.invListsTypeTraits = invListsTypeTraits;
-        this.invListComparatorFactories = invListComparatorFactories;
-        this.tokenizerFactory = tokenizerFactory;
-        this.invListsFileSplitProvider = invListsFileSplitProvider;
-
-        if (outputArity > 0) {
-            recordDescriptors[0] = recDesc;
-        }
-    }
-
-    @Override
-    public IFileSplitProvider getFileSplitProvider() {
-        return btreeFileSplitProvider;
-    }
-    
-    @Override
-    public IFileSplitProvider getInvListsFileSplitProvider() {
-        return invListsFileSplitProvider;
-    }
-
-    @Override
-    public IBinaryComparatorFactory[] getTreeIndexComparatorFactories() {
-        return btreeComparatorFactories;
-    }
-
-    @Override
-    public ITypeTraits[] getTreeIndexTypeTraits() {
-        return btreeTypeTraits;
-    }
-
-    @Override
-    public IStorageManagerInterface getStorageManager() {
-        return storageManager;
-    }
-
-    @Override
-    public RecordDescriptor getRecordDescriptor() {
-        return recordDescriptors[0];
-    }
-
-    @Override
-    public IBinaryComparatorFactory[] getInvListsComparatorFactories() {
-        return invListComparatorFactories;
-    }
-
-    @Override
-    public IBinaryTokenizerFactory getTokenizerFactory() {
-        return tokenizerFactory;
-    }
-    
-    @Override
-    public ITypeTraits[] getInvListsTypeTraits() {
-        return invListsTypeTraits;
-    }
-
-    @Override
-    public IIndexRegistryProvider<IIndex> getIndexRegistryProvider() {
-        return indexRegistryProvider;
-    }
-    
-    @Override
-    public IIndexDataflowHelperFactory getIndexDataflowHelperFactory() {
-        return btreeDataflowHelperFactory;
-    }
-    
-    @Override
-    public boolean getRetainInput() {
-    	return retainInput;
-    }
-    
-    @Override
-    public IOperationCallbackProvider getOpCallbackProvider() {
-    	return opCallbackProvider;
-    }
-    
-    @Override
-	public ITupleFilterFactory getTupleFilterFactory() {
-		return null;
-	}
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/BinaryTokenizerOperatorDescriptor.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/BinaryTokenizerOperatorDescriptor.java
deleted file mode 100644
index a146479..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/BinaryTokenizerOperatorDescriptor.java
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.dataflow;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
-import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
-import edu.uci.ics.hyracks.dataflow.std.base.AbstractSingleActivityOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizerFactory;
-
-public class BinaryTokenizerOperatorDescriptor extends AbstractSingleActivityOperatorDescriptor {
-
-    private static final long serialVersionUID = 1L;
-
-    private final IBinaryTokenizerFactory tokenizerFactory;
-    // Fields that will be tokenized
-    private final int[] tokenFields;
-    // operator will append these key fields to each token, e.g., as
-    // payload for an inverted list
-    // WARNING: too many key fields can cause significant data blowup.
-    private final int[] keyFields;
-
-    public BinaryTokenizerOperatorDescriptor(IOperatorDescriptorRegistry spec, RecordDescriptor recDesc,
-            IBinaryTokenizerFactory tokenizerFactory, int[] tokenFields, int[] keyFields) {
-        super(spec, 1, 1);
-        this.tokenizerFactory = tokenizerFactory;
-        this.tokenFields = tokenFields;
-        this.keyFields = keyFields;
-        recordDescriptors[0] = recDesc;
-    }
-
-    @Override
-    public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
-            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException {
-        return new BinaryTokenizerOperatorNodePushable(ctx, recordDescProvider.getInputRecordDescriptor(
-                getActivityId(), 0), recordDescriptors[0], tokenizerFactory.createTokenizer(), tokenFields, keyFields);
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/BinaryTokenizerOperatorNodePushable.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/BinaryTokenizerOperatorNodePushable.java
deleted file mode 100644
index 6744f70..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/BinaryTokenizerOperatorNodePushable.java
+++ /dev/null
@@ -1,126 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.dataflow;
-
-import java.io.IOException;
-import java.nio.ByteBuffer;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.data.std.util.GrowableArray;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
-import edu.uci.ics.hyracks.dataflow.common.comm.util.FrameUtils;
-import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputUnaryOutputOperatorNodePushable;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizer;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IToken;
-
-public class BinaryTokenizerOperatorNodePushable extends AbstractUnaryInputUnaryOutputOperatorNodePushable {
-
-    private final IHyracksTaskContext ctx;
-    private final IBinaryTokenizer tokenizer;
-    private final int[] tokenFields;
-    private final int[] projFields;
-    private final RecordDescriptor inputRecDesc;
-    private final RecordDescriptor outputRecDesc;
-
-    private FrameTupleAccessor accessor;
-    private ArrayTupleBuilder builder;
-    private GrowableArray builderFieldData;
-    private FrameTupleAppender appender;
-    private ByteBuffer writeBuffer;
-
-    public BinaryTokenizerOperatorNodePushable(IHyracksTaskContext ctx, RecordDescriptor inputRecDesc,
-            RecordDescriptor outputRecDesc, IBinaryTokenizer tokenizer, int[] tokenFields, int[] projFields) {
-        this.ctx = ctx;
-        this.tokenizer = tokenizer;
-        this.tokenFields = tokenFields;
-        this.projFields = projFields;
-        this.inputRecDesc = inputRecDesc;
-        this.outputRecDesc = outputRecDesc;
-    }
-
-    @Override
-    public void open() throws HyracksDataException {
-        accessor = new FrameTupleAccessor(ctx.getFrameSize(), inputRecDesc);
-        writeBuffer = ctx.allocateFrame();
-        builder = new ArrayTupleBuilder(outputRecDesc.getFieldCount());
-        builderFieldData = builder.getFieldData();
-        appender = new FrameTupleAppender(ctx.getFrameSize());
-        appender.reset(writeBuffer, true);
-        writer.open();
-    }
-
-    @Override
-    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
-        accessor.reset(buffer);
-
-        int tupleCount = accessor.getTupleCount();
-        for (int i = 0; i < tupleCount; i++) {
-
-            for (int j = 0; j < tokenFields.length; j++) {
-
-                tokenizer.reset(
-                        accessor.getBuffer().array(),
-                        accessor.getTupleStartOffset(i) + accessor.getFieldSlotsLength()
-                                + accessor.getFieldStartOffset(i, tokenFields[j]),
-                        accessor.getFieldLength(i, tokenFields[j]));
-
-                while (tokenizer.hasNext()) {
-                    tokenizer.next();
-
-                    builder.reset();
-                    try {
-                        IToken token = tokenizer.getToken();
-                        token.serializeToken(builderFieldData);
-                        builder.addFieldEndOffset();
-                    } catch (IOException e) {
-                        throw new HyracksDataException(e.getMessage());
-                    }
-
-                    for (int k = 0; k < projFields.length; k++) {
-                        builder.addField(accessor, i, projFields[k]);
-                    }
-
-                    if (!appender.append(builder.getFieldEndOffsets(), builder.getByteArray(), 0, builder.getSize())) {
-                        FrameUtils.flushFrame(writeBuffer, writer);
-                        appender.reset(writeBuffer, true);
-                        if (!appender
-                                .append(builder.getFieldEndOffsets(), builder.getByteArray(), 0, builder.getSize())) {
-                            throw new IllegalStateException();
-                        }
-                    }
-                }
-            }
-        }
-
-        if (appender.getTupleCount() > 0) {
-            FrameUtils.flushFrame(writeBuffer, writer);
-        }
-    }
-
-    @Override
-    public void close() throws HyracksDataException {
-        writer.close();
-    }
-
-    @Override
-    public void fail() throws HyracksDataException {
-        writer.fail();
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexBulkLoadOperatorDescriptor.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexBulkLoadOperatorDescriptor.java
deleted file mode 100644
index 7ffec4d..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexBulkLoadOperatorDescriptor.java
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.dataflow;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizerFactory;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-
-public class InvertedIndexBulkLoadOperatorDescriptor extends AbstractInvertedIndexOperatorDescriptor {
-
-    private static final long serialVersionUID = 1L;
-
-    private final int[] fieldPermutation;
-
-    public InvertedIndexBulkLoadOperatorDescriptor(IOperatorDescriptorRegistry spec, int[] fieldPermutation,
-            IStorageManagerInterface storageManager, IFileSplitProvider btreeFileSplitProvider,
-            IFileSplitProvider invListsFileSplitProvider, IIndexRegistryProvider<IIndex> indexRegistryProvider,
-            ITypeTraits[] tokenTypeTraits, IBinaryComparatorFactory[] tokenComparatorFactories,
-            ITypeTraits[] invListsTypeTraits, IBinaryComparatorFactory[] invListComparatorFactories,
-            IBinaryTokenizerFactory tokenizerFactory, IIndexDataflowHelperFactory btreeDataflowHelperFactory,
-            IOperationCallbackProvider opCallbackProvider) {
-        super(spec, 1, 0, null, storageManager, btreeFileSplitProvider, invListsFileSplitProvider,
-                indexRegistryProvider, tokenTypeTraits, tokenComparatorFactories, invListsTypeTraits,
-                invListComparatorFactories, tokenizerFactory, btreeDataflowHelperFactory, false,
-                opCallbackProvider);
-        this.fieldPermutation = fieldPermutation;
-    }
-
-    @Override
-    public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
-            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
-        return new InvertedIndexBulkLoadOperatorNodePushable(this, ctx, partition, fieldPermutation, recordDescProvider);
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexBulkLoadOperatorNodePushable.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexBulkLoadOperatorNodePushable.java
deleted file mode 100644
index c6fa56d..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexBulkLoadOperatorNodePushable.java
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.storage.am.invertedindex.dataflow;
-
-import java.nio.ByteBuffer;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
-import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputSinkOperatorNodePushable;
-import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.PermutingFrameTupleReference;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.InvertedIndex;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.InvertedIndex.InvertedIndexBulkLoadContext;
-
-public class InvertedIndexBulkLoadOperatorNodePushable extends AbstractUnaryInputSinkOperatorNodePushable {
-    private final TreeIndexDataflowHelper btreeDataflowHelper;
-    private final InvertedIndexDataflowHelper invIndexDataflowHelper;
-    private InvertedIndex invIndex;
-    private InvertedIndex.InvertedIndexBulkLoadContext bulkLoadCtx;
-
-    private FrameTupleAccessor accessor;
-    private PermutingFrameTupleReference tuple = new PermutingFrameTupleReference();
-
-    private IRecordDescriptorProvider recordDescProvider;
-
-    public InvertedIndexBulkLoadOperatorNodePushable(AbstractInvertedIndexOperatorDescriptor opDesc,
-            IHyracksTaskContext ctx, int partition, int[] fieldPermutation, IRecordDescriptorProvider recordDescProvider) {
-        btreeDataflowHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory()
-                .createIndexDataflowHelper(opDesc, ctx, partition);
-        invIndexDataflowHelper = new InvertedIndexDataflowHelper(btreeDataflowHelper, opDesc, ctx, partition);
-        this.recordDescProvider = recordDescProvider;
-        tuple.setFieldPermutation(fieldPermutation);
-    }
-
-    @Override
-    public void open() throws HyracksDataException {
-        AbstractInvertedIndexOperatorDescriptor opDesc = (AbstractInvertedIndexOperatorDescriptor) btreeDataflowHelper
-                .getOperatorDescriptor();
-        RecordDescriptor recDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
-        accessor = new FrameTupleAccessor(btreeDataflowHelper.getHyracksTaskContext().getFrameSize(), recDesc);
-
-        // BTree.
-        try {
-            btreeDataflowHelper.init(false);
-        } catch (Exception e) {
-            // Cleanup in case of failure.
-            btreeDataflowHelper.deinit();
-            if (e instanceof HyracksDataException) {
-                throw (HyracksDataException) e;
-            } else {
-                throw new HyracksDataException(e);
-            }
-        }
-
-        // Inverted Index.
-        try {
-            invIndexDataflowHelper.init(false);
-            invIndex = (InvertedIndex) invIndexDataflowHelper.getIndex();
-            bulkLoadCtx = (InvertedIndexBulkLoadContext) invIndex.beginBulkLoad(BTree.DEFAULT_FILL_FACTOR);
-        } catch (Exception e) {
-            // Cleanup in case of failure.
-            invIndexDataflowHelper.deinit();
-            if (e instanceof HyracksDataException) {
-                throw (HyracksDataException) e;
-            } else {
-                throw new HyracksDataException(e);
-            }
-        }
-    }
-
-    @Override
-    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
-        accessor.reset(buffer);
-        int tupleCount = accessor.getTupleCount();
-        for (int i = 0; i < tupleCount; i++) {
-            tuple.reset(accessor, i);
-            invIndex.bulkLoadAddTuple(tuple, bulkLoadCtx);
-        }
-    }
-
-    @Override
-    public void close() throws HyracksDataException {
-        try {
-            invIndex.endBulkLoad(bulkLoadCtx);
-        } catch (Exception e) {
-            throw new HyracksDataException(e);
-        } finally {
-            try {
-                btreeDataflowHelper.deinit();
-            } finally {
-                invIndexDataflowHelper.deinit();
-            }
-        }
-    }
-
-    @Override
-    public void fail() throws HyracksDataException {
-        writer.fail();
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexCreateOperatorDescriptor.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexCreateOperatorDescriptor.java
deleted file mode 100644
index 01d1a97..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexCreateOperatorDescriptor.java
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.dataflow;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizerFactory;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-
-public class InvertedIndexCreateOperatorDescriptor extends AbstractInvertedIndexOperatorDescriptor {
-
-    private static final long serialVersionUID = 1L;
-
-    public InvertedIndexCreateOperatorDescriptor(IOperatorDescriptorRegistry spec,
-            IStorageManagerInterface storageManager, IFileSplitProvider btreeFileSplitProvider,
-            IFileSplitProvider invListsFileSplitProvider, IIndexRegistryProvider<IIndex> indexRegistryProvider,
-            ITypeTraits[] tokenTypeTraits, IBinaryComparatorFactory[] tokenComparatorFactories,
-            ITypeTraits[] invListsTypeTraits, IBinaryComparatorFactory[] invListComparatorFactories,
-            IBinaryTokenizerFactory tokenizerFactory, IIndexDataflowHelperFactory btreeDataflowHelperFactory,
-            IOperationCallbackProvider opCallbackProvider) {
-        super(spec, 0, 0, null, storageManager, btreeFileSplitProvider, invListsFileSplitProvider,
-                indexRegistryProvider, tokenTypeTraits, tokenComparatorFactories, invListsTypeTraits,
-                invListComparatorFactories, tokenizerFactory, btreeDataflowHelperFactory, false, opCallbackProvider);
-    }
-
-    @Override
-    public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
-            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
-        return new InvertedIndexCreateOperatorNodePushable(this, ctx, partition);
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexCreateOperatorNodePushable.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexCreateOperatorNodePushable.java
deleted file mode 100644
index eb909d8..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexCreateOperatorNodePushable.java
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.storage.am.invertedindex.dataflow;
-
-import edu.uci.ics.hyracks.api.comm.IFrameWriter;
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.std.base.AbstractOperatorNodePushable;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
-
-public class InvertedIndexCreateOperatorNodePushable extends AbstractOperatorNodePushable {
-    private final TreeIndexDataflowHelper btreeDataflowHelper;
-    private final InvertedIndexDataflowHelper invIndexDataflowHelper;
-
-    public InvertedIndexCreateOperatorNodePushable(AbstractInvertedIndexOperatorDescriptor opDesc,
-            IHyracksTaskContext ctx, int partition) {
-        btreeDataflowHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory()
-                .createIndexDataflowHelper(opDesc, ctx, partition);
-        invIndexDataflowHelper = new InvertedIndexDataflowHelper(btreeDataflowHelper, opDesc, ctx, partition);
-    }
-
-    @Override
-    public void deinitialize() throws HyracksDataException {
-    }
-
-    @Override
-    public int getInputArity() {
-        return 0;
-    }
-
-    @Override
-    public IFrameWriter getInputFrameWriter(int index) {
-        return null;
-    }
-
-    @Override
-    public void initialize() throws HyracksDataException {
-    	// BTree.
-    	try {
-    		btreeDataflowHelper.init(true);
-    	} finally {
-    		btreeDataflowHelper.deinit();
-    	}
-    	// Inverted Index.
-    	try {
-    		invIndexDataflowHelper.init(true);
-    	} finally {
-    		invIndexDataflowHelper.deinit();
-    	}
-    }
-
-    @Override
-    public void setOutputFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc) {
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexDataflowHelper.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexDataflowHelper.java
deleted file mode 100644
index 6d0ff38..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexDataflowHelper.java
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.storage.am.invertedindex.dataflow;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedListBuilder;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.FixedSizeElementInvertedListBuilder;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.InvertedIndex;
-
-public final class InvertedIndexDataflowHelper extends IndexDataflowHelper {
-    private final TreeIndexDataflowHelper btreeDataflowHelper;
-
-    public InvertedIndexDataflowHelper(TreeIndexDataflowHelper btreeDataflowHelper, IIndexOperatorDescriptor opDesc,
-            IHyracksTaskContext ctx, int partition) {
-        super(opDesc, ctx, partition);
-        this.btreeDataflowHelper = btreeDataflowHelper;
-    }
-
-    public FileReference getFilereference() {
-        AbstractInvertedIndexOperatorDescriptor invIndexOpDesc = (AbstractInvertedIndexOperatorDescriptor) opDesc;
-        IFileSplitProvider fileSplitProvider = invIndexOpDesc.getInvListsFileSplitProvider();
-        return fileSplitProvider.getFileSplits()[partition].getLocalFile();
-    }
-
-    @Override
-    public IIndex createIndexInstance() throws HyracksDataException {
-        IInvertedIndexOperatorDescriptor invIndexOpDesc = (IInvertedIndexOperatorDescriptor) opDesc;
-        // Assumes btreeDataflowHelper.init() has already been called.
-        BTree btree = (BTree) btreeDataflowHelper.getIndex();
-        IInvertedListBuilder invListBuilder = new FixedSizeElementInvertedListBuilder(
-                invIndexOpDesc.getInvListsTypeTraits());
-        return new InvertedIndex(opDesc.getStorageManager().getBufferCache(ctx), btree,
-                invIndexOpDesc.getInvListsTypeTraits(), invIndexOpDesc.getInvListsComparatorFactories(),
-                invListBuilder);
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexSearchOperatorDescriptor.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexSearchOperatorDescriptor.java
deleted file mode 100644
index 497dfb5..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexSearchOperatorDescriptor.java
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.dataflow;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
-import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifier;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifierFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizerFactory;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-
-public class InvertedIndexSearchOperatorDescriptor extends AbstractInvertedIndexOperatorDescriptor {
-    private static final long serialVersionUID = 1L;
-
-    private final int queryField;
-    private final IInvertedIndexSearchModifierFactory searchModifierFactory;
-
-    public InvertedIndexSearchOperatorDescriptor(IOperatorDescriptorRegistry spec, int queryField,
-            IStorageManagerInterface storageManager, IFileSplitProvider btreeFileSplitProvider,
-            IFileSplitProvider invListsFileSplitProvider, IIndexRegistryProvider<IIndex> indexRegistryProvider,
-            ITypeTraits[] tokenTypeTraits, IBinaryComparatorFactory[] tokenComparatorFactories,
-            ITypeTraits[] invListsTypeTraits, IBinaryComparatorFactory[] invListComparatorFactories,
-            IIndexDataflowHelperFactory btreeDataflowHelperFactory, IBinaryTokenizerFactory queryTokenizerFactory,
-            IInvertedIndexSearchModifierFactory searchModifierFactory, RecordDescriptor recDesc, boolean retainInput,
-            IOperationCallbackProvider opCallbackProvider) {
-        super(spec, 1, 1, recDesc, storageManager, btreeFileSplitProvider, invListsFileSplitProvider,
-                indexRegistryProvider, tokenTypeTraits, tokenComparatorFactories, invListsTypeTraits,
-                invListComparatorFactories, queryTokenizerFactory, btreeDataflowHelperFactory, retainInput,
-                opCallbackProvider);
-        this.queryField = queryField;
-        this.searchModifierFactory = searchModifierFactory;
-    }
-
-    @Override
-    public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
-            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException {
-        IInvertedIndexSearchModifier searchModifier = searchModifierFactory.createSearchModifier();
-        return new InvertedIndexSearchOperatorNodePushable(this, ctx, partition, queryField, searchModifier,
-                recordDescProvider);
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexSearchOperatorNodePushable.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexSearchOperatorNodePushable.java
deleted file mode 100644
index f3080f4..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexSearchOperatorNodePushable.java
+++ /dev/null
@@ -1,186 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.dataflow;
-
-import java.io.DataOutput;
-import java.nio.ByteBuffer;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
-import edu.uci.ics.hyracks.dataflow.common.comm.util.FrameUtils;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputUnaryOutputOperatorNodePushable;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifier;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.InvertedIndex;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.InvertedIndexSearchPredicate;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.OccurrenceThresholdPanicException;
-
-public class InvertedIndexSearchOperatorNodePushable extends AbstractUnaryInputUnaryOutputOperatorNodePushable {
-    private final TreeIndexDataflowHelper btreeDataflowHelper;
-    private final InvertedIndexDataflowHelper invIndexDataflowHelper;
-    private final int queryField;
-    private FrameTupleAccessor accessor;
-    private FrameTupleReference tuple;
-    private IRecordDescriptorProvider recordDescProvider;
-    private InvertedIndex invIndex;
-
-    private final InvertedIndexSearchPredicate searchPred;
-    private IIndexAccessor indexAccessor;
-    private IIndexCursor resultCursor;
-
-    private ByteBuffer writeBuffer;
-    private FrameTupleAppender appender;
-    private ArrayTupleBuilder tb;
-    private DataOutput dos;
-
-    private final AbstractInvertedIndexOperatorDescriptor opDesc;
-    private final boolean retainInput;
-
-    public InvertedIndexSearchOperatorNodePushable(AbstractInvertedIndexOperatorDescriptor opDesc,
-            IHyracksTaskContext ctx, int partition, int queryField, IInvertedIndexSearchModifier searchModifier,
-            IRecordDescriptorProvider recordDescProvider) {
-        this.opDesc = opDesc;
-        btreeDataflowHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory()
-                .createIndexDataflowHelper(opDesc, ctx, partition);
-        invIndexDataflowHelper = new InvertedIndexDataflowHelper(btreeDataflowHelper, opDesc, ctx, partition);
-        this.queryField = queryField;
-        this.searchPred = new InvertedIndexSearchPredicate(opDesc.getTokenizerFactory().createTokenizer(), searchModifier);
-        this.recordDescProvider = recordDescProvider;
-        this.retainInput = invIndexDataflowHelper.getOperatorDescriptor().getRetainInput();
-    }
-
-    @Override
-    public void open() throws HyracksDataException {
-        RecordDescriptor inputRecDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
-        accessor = new FrameTupleAccessor(btreeDataflowHelper.getHyracksTaskContext().getFrameSize(), inputRecDesc);
-        tuple = new FrameTupleReference();
-        // BTree.
-        try {
-            btreeDataflowHelper.init(false);
-        } catch (Exception e) {
-            // Cleanup in case of failure/
-            btreeDataflowHelper.deinit();
-            if (e instanceof HyracksDataException) {
-                throw (HyracksDataException) e;
-            } else {
-                throw new HyracksDataException(e);
-            }
-        }
-        // Inverted Index.
-        try {
-            invIndexDataflowHelper.init(false);
-            invIndex = (InvertedIndex) invIndexDataflowHelper.getIndex();
-        } catch (Exception e) {
-            // Cleanup in case of failure.
-            invIndexDataflowHelper.deinit();
-            if (e instanceof HyracksDataException) {
-                throw (HyracksDataException) e;
-            } else {
-                throw new HyracksDataException(e);
-            }
-        }
-
-        writeBuffer = btreeDataflowHelper.getHyracksTaskContext().allocateFrame();
-        tb = new ArrayTupleBuilder(recordDesc.getFieldCount());
-        dos = tb.getDataOutput();
-        appender = new FrameTupleAppender(btreeDataflowHelper.getHyracksTaskContext().getFrameSize());
-        appender.reset(writeBuffer, true);
-
-        indexAccessor = invIndex.createAccessor();
-        //InvertedIndex.InvertedIndexAccessor accessor =  
-        resultCursor = indexAccessor.createSearchCursor();
-        writer.open();
-    }
-
-    private void writeSearchResults() throws Exception {
-        while (resultCursor.hasNext()) {
-            resultCursor.next();
-            tb.reset();
-            if (retainInput) {
-                for (int i = 0; i < tuple.getFieldCount(); i++) {
-                	dos.write(tuple.getFieldData(i), tuple.getFieldStart(i), tuple.getFieldLength(i));
-                    tb.addFieldEndOffset();
-                }
-            }
-            ITupleReference invListElement = resultCursor.getTuple();
-            int invListFields = opDesc.getInvListsTypeTraits().length;
-            for (int i = 0; i < invListFields; i++) {
-                dos.write(invListElement.getFieldData(i), invListElement.getFieldStart(i),
-                        invListElement.getFieldLength(i));
-                tb.addFieldEndOffset();
-            }
-            if (!appender.append(tb.getFieldEndOffsets(), tb.getByteArray(), 0, tb.getSize())) {
-                FrameUtils.flushFrame(writeBuffer, writer);
-                appender.reset(writeBuffer, true);
-                if (!appender.append(tb.getFieldEndOffsets(), tb.getByteArray(), 0, tb.getSize())) {
-                    throw new IllegalStateException();
-                }
-            }
-        }
-    }
-
-    @Override
-    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
-        accessor.reset(buffer);
-        int tupleCount = accessor.getTupleCount();
-        try {
-            for (int i = 0; i < tupleCount; i++) {
-                tuple.reset(accessor, i);
-                searchPred.setQueryTuple(tuple);
-                searchPred.setQueryFieldIndex(queryField);
-                try {
-                    resultCursor.reset();
-                    indexAccessor.search(resultCursor, searchPred);
-                    writeSearchResults();
-                } catch (OccurrenceThresholdPanicException e) {
-                    // Ignore panic cases for now.
-                }
-            }
-        } catch (Exception e) {
-            throw new HyracksDataException(e);
-        }
-    }
-
-    @Override
-    public void fail() throws HyracksDataException {
-        writer.fail();
-    }
-
-    @Override
-    public void close() throws HyracksDataException {
-        try {
-            if (appender.getTupleCount() > 0) {
-                FrameUtils.flushFrame(writeBuffer, writer);
-            }
-            writer.close();
-        } finally {
-            try {
-                btreeDataflowHelper.deinit();
-            } finally {
-                invIndexDataflowHelper.deinit();
-            }
-        }
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeElementInvertedListBuilder.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeElementInvertedListBuilder.java
deleted file mode 100644
index c4ab601..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeElementInvertedListBuilder.java
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.impls;
-
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedListBuilder;
-
-public class FixedSizeElementInvertedListBuilder implements IInvertedListBuilder {
-    private final int listElementSize;
-    private int listSize = 0;
-
-    private byte[] targetBuf;
-    private int pos;
-
-    public FixedSizeElementInvertedListBuilder(ITypeTraits[] invListFields) {
-        int tmp = 0;
-        for (int i = 0; i < invListFields.length; i++) {
-            tmp += invListFields[i].getFixedLength();
-        }
-        listElementSize = tmp;
-    }
-
-    @Override
-    public boolean startNewList(ITupleReference tuple, int tokenField) {
-        if (pos + listElementSize >= targetBuf.length)
-            return false;
-        else {
-            listSize = 0;
-            return true;
-        }
-    }
-
-    @Override
-    public boolean appendElement(ITupleReference tuple, int numTokenFields, int numElementFields) {
-        if (pos + listElementSize >= targetBuf.length)
-            return false;
-
-        for (int i = 0; i < numElementFields; i++) {
-            int field = numTokenFields + i;
-            System.arraycopy(tuple.getFieldData(field), tuple.getFieldStart(field), targetBuf, pos,
-                    tuple.getFieldLength(field));
-        }
-
-        listSize++;
-        pos += listElementSize;
-
-        return true;
-    }
-
-    @Override
-    public void setTargetBuffer(byte[] targetBuf, int startPos) {
-        this.targetBuf = targetBuf;
-        this.pos = startPos;
-    }
-
-    @Override
-    public int getListSize() {
-        return listSize;
-    }
-
-    @Override
-    public int getPos() {
-        return pos;
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeElementInvertedListCursor.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeElementInvertedListCursor.java
deleted file mode 100644
index 446f171..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeElementInvertedListCursor.java
+++ /dev/null
@@ -1,280 +0,0 @@
-package edu.uci.ics.hyracks.storage.am.invertedindex.impls;
-
-import java.io.ByteArrayInputStream;
-import java.io.DataInput;
-import java.io.DataInputStream;
-
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedListCursor;
-import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
-import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
-import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
-
-public class FixedSizeElementInvertedListCursor implements IInvertedListCursor {
-
-    private final IBufferCache bufferCache;
-    private final int fileId;
-    private final int elementSize;
-    private int currentElementIx;
-    private int currentOff;
-    private int currentPageIx;
-
-    private int startPageId;
-    private int endPageId;
-    private int startOff;
-    private int numElements;
-
-    private final FixedSizeTupleReference tuple;
-    private ICachedPage[] pages = new ICachedPage[10];
-    private int[] elementIndexes = new int[10];
-
-    public FixedSizeElementInvertedListCursor(IBufferCache bufferCache, int fileId, ITypeTraits[] invListFields) {
-        this.bufferCache = bufferCache;
-        this.fileId = fileId;
-        this.currentElementIx = 0;
-        this.currentPageIx = 0;
-
-        int tmp = 0;
-        for (int i = 0; i < invListFields.length; i++) {
-            tmp += invListFields[i].getFixedLength();
-        }
-        elementSize = tmp;
-        this.currentOff = -elementSize;
-        this.tuple = new FixedSizeTupleReference(invListFields);
-    }
-
-    @Override
-    public boolean hasNext() {
-        if (currentElementIx < numElements)
-            return true;
-        else
-            return false;
-    }
-
-    @Override
-    public void next() {
-        if (currentOff + 2 * elementSize >= bufferCache.getPageSize()) {
-            currentPageIx++;
-            currentOff = 0;
-        } else {
-            currentOff += elementSize;
-        }
-
-        currentElementIx++;
-        tuple.reset(pages[currentPageIx].getBuffer().array(), currentOff);
-    }
-
-    @Override
-    public void pinPagesAsync() {
-        // TODO: implement
-    }
-
-    @Override
-    public void pinPagesSync() throws HyracksDataException {
-        int pix = 0;
-        for (int i = startPageId; i <= endPageId; i++) {
-            pages[pix] = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, i), false);
-            pages[pix].acquireReadLatch();
-            pix++;
-        }
-    }
-
-    @Override
-    public void unpinPages() throws HyracksDataException {
-        int numPages = endPageId - startPageId + 1;
-        for (int i = 0; i < numPages; i++) {
-            pages[i].releaseReadLatch();
-            bufferCache.unpin(pages[i]);
-        }
-    }
-
-    @Override
-    public void positionCursor(int elementIx) {
-        int numPages = endPageId - startPageId + 1;
-
-        currentPageIx = binarySearch(elementIndexes, 0, numPages, elementIx);
-        if (currentPageIx < 0) {
-            throw new IndexOutOfBoundsException("Requested index: " + elementIx + " from array with numElements: "
-                    + numElements);
-        }
-
-        if (currentPageIx == 0) {
-            currentOff = startOff + elementIx * elementSize;
-        } else {
-            int relativeElementIx = elementIx - elementIndexes[currentPageIx - 1] - 1;
-            currentOff = relativeElementIx * elementSize;
-        }
-
-        currentElementIx = elementIx;
-        tuple.reset(pages[currentPageIx].getBuffer().array(), currentOff);
-    }
-
-    @Override
-    public boolean containsKey(ITupleReference searchTuple, MultiComparator invListCmp) {
-        int mid;
-        int begin = 0;
-        int end = numElements - 1;
-
-        while (begin <= end) {
-            mid = (begin + end) / 2;
-            positionCursor(mid);
-            int cmp = invListCmp.compare(searchTuple, tuple);
-            if (cmp < 0) {
-                end = mid - 1;
-            } else if (cmp > 0) {
-                begin = mid + 1;
-            } else {
-                return true;
-            }
-        }
-
-        return false;
-    }
-
-    @Override
-    public void reset(int startPageId, int endPageId, int startOff, int numElements) {
-        this.startPageId = startPageId;
-        this.endPageId = endPageId;
-        this.startOff = startOff;
-        this.numElements = numElements;
-        this.currentElementIx = 0;
-        this.currentPageIx = 0;
-        this.currentOff = startOff - elementSize;
-
-        int numPages = endPageId - startPageId + 1;
-        if (numPages > pages.length) {
-            pages = new ICachedPage[endPageId - startPageId + 1];
-            elementIndexes = new int[endPageId - startPageId + 1];
-        }
-
-        // fill elementIndexes
-        // first page
-        int cumulElements = (bufferCache.getPageSize() - startOff) / elementSize;
-        elementIndexes[0] = cumulElements - 1;
-
-        // middle, full pages
-        for (int i = 1; i < numPages - 1; i++) {
-            elementIndexes[i] = elementIndexes[i - 1] + (bufferCache.getPageSize() / elementSize);
-        }
-
-        // last page
-        elementIndexes[numPages - 1] = numElements - 1;
-    }
-
-    @Override
-    public String printInvList(ISerializerDeserializer[] serdes) throws HyracksDataException {
-        int oldCurrentOff = currentOff;
-        int oldCurrentPageId = currentPageIx;
-        int oldCurrentElementIx = currentElementIx;
-
-        currentOff = startOff - elementSize;
-        currentPageIx = 0;
-        currentElementIx = 0;
-
-        StringBuilder strBuilder = new StringBuilder();
-
-        int count = 0;
-        while (hasNext()) {
-            next();
-            count++;
-            for (int i = 0; i < tuple.getFieldCount(); i++) {
-                ByteArrayInputStream inStream = new ByteArrayInputStream(tuple.getFieldData(i), tuple.getFieldStart(i),
-                        tuple.getFieldLength(i));
-                DataInput dataIn = new DataInputStream(inStream);
-                Object o = serdes[i].deserialize(dataIn);
-                strBuilder.append(o.toString());
-                if (i + 1 < tuple.getFieldCount())
-                    strBuilder.append(",");
-            }
-            strBuilder.append(" ");
-        }
-
-        // reset previous state
-        currentOff = oldCurrentOff;
-        currentPageIx = oldCurrentPageId;
-        currentElementIx = oldCurrentElementIx;
-
-        return strBuilder.toString();
-    }
-
-    public String printCurrentElement(ISerializerDeserializer[] serdes) throws HyracksDataException {
-        StringBuilder strBuilder = new StringBuilder();
-        for (int i = 0; i < tuple.getFieldCount(); i++) {
-            ByteArrayInputStream inStream = new ByteArrayInputStream(tuple.getFieldData(i), tuple.getFieldStart(i),
-                    tuple.getFieldLength(i));
-            DataInput dataIn = new DataInputStream(inStream);
-            Object o = serdes[i].deserialize(dataIn);
-            strBuilder.append(o.toString());
-            if (i + 1 < tuple.getFieldCount())
-                strBuilder.append(",");
-        }
-        return strBuilder.toString();
-    }
-
-    private int binarySearch(int[] arr, int arrStart, int arrLength, int key) {
-        int mid;
-        int begin = arrStart;
-        int end = arrStart + arrLength - 1;
-
-        while (begin <= end) {
-            mid = (begin + end) / 2;
-            int cmp = (key - arr[mid]);
-            if (cmp < 0) {
-                end = mid - 1;
-            } else if (cmp > 0) {
-                begin = mid + 1;
-            } else {
-                return mid;
-            }
-        }
-
-        if (begin > arr.length - 1)
-            return -1;
-        if (key < arr[begin])
-            return begin;
-        else
-            return -1;
-    }
-
-    @Override
-    public int compareTo(IInvertedListCursor invListCursor) {
-        return numElements - invListCursor.getNumElements();
-    }
-
-    @Override
-    public int getEndPageId() {
-        return endPageId;
-    }
-
-    @Override
-    public int getNumElements() {
-        return numElements;
-    }
-
-    @Override
-    public int getStartOff() {
-        return startOff;
-    }
-
-    @Override
-    public int getStartPageId() {
-        return startPageId;
-    }
-
-    public int getOffset() {
-        return currentOff;
-    }
-
-    public ICachedPage getPage() {
-        return pages[currentPageIx];
-    }
-
-    @Override
-    public ITupleReference getTuple() {
-        return tuple;
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeFrameTupleAccessor.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeFrameTupleAccessor.java
deleted file mode 100644
index cbedc45..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeFrameTupleAccessor.java
+++ /dev/null
@@ -1,98 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.impls;
-
-import java.nio.ByteBuffer;
-
-import edu.uci.ics.hyracks.api.comm.FrameHelper;
-import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-
-public class FixedSizeFrameTupleAccessor implements IFrameTupleAccessor {
-
-    private final int frameSize;
-    private ByteBuffer buffer;
-
-    private final ITypeTraits[] fields;
-    private final int[] fieldStartOffsets;
-    private final int tupleSize;
-
-    public FixedSizeFrameTupleAccessor(int frameSize, ITypeTraits[] fields) {
-        this.frameSize = frameSize;
-        this.fields = fields;
-        this.fieldStartOffsets = new int[fields.length];
-        this.fieldStartOffsets[0] = 0;
-        for (int i = 1; i < fields.length; i++) {
-            fieldStartOffsets[i] = fieldStartOffsets[i - 1] + fields[i - 1].getFixedLength();
-        }
-
-        int tmp = 0;
-        for (int i = 0; i < fields.length; i++) {
-            tmp += fields[i].getFixedLength();
-        }
-        tupleSize = tmp;
-    }
-
-    @Override
-    public ByteBuffer getBuffer() {
-        return buffer;
-    }
-
-    @Override
-    public int getFieldCount() {
-        return fields.length;
-    }
-
-    @Override
-    public int getFieldEndOffset(int tupleIndex, int fIdx) {
-        return getTupleStartOffset(tupleIndex) + fieldStartOffsets[fIdx] + fields[fIdx].getFixedLength();
-    }
-
-    @Override
-    public int getFieldLength(int tupleIndex, int fIdx) {
-        return fields[fIdx].getFixedLength();
-    }
-
-    @Override
-    public int getFieldSlotsLength() {
-        return 0;
-    }
-
-    @Override
-    public int getFieldStartOffset(int tupleIndex, int fIdx) {
-        return tupleIndex * tupleSize + fieldStartOffsets[fIdx];
-    }
-
-    @Override
-    public int getTupleCount() {
-        return buffer.getInt(FrameHelper.getTupleCountOffset(frameSize));
-    }
-
-    @Override
-    public int getTupleEndOffset(int tupleIndex) {
-        return getFieldEndOffset(tupleIndex, fields.length - 1);
-    }
-
-    @Override
-    public int getTupleStartOffset(int tupleIndex) {
-        return tupleIndex * tupleSize;
-    }
-
-    @Override
-    public void reset(ByteBuffer buffer) {
-        this.buffer = buffer;
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeFrameTupleAppender.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeFrameTupleAppender.java
deleted file mode 100644
index 489ec2e..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeFrameTupleAppender.java
+++ /dev/null
@@ -1,127 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.impls;
-
-import java.nio.ByteBuffer;
-
-import edu.uci.ics.hyracks.api.comm.FrameHelper;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-
-public class FixedSizeFrameTupleAppender {
-
-    private static final int TUPLE_COUNT_SIZE = 4;
-    private final int frameSize;
-    private final int tupleSize;
-    private ByteBuffer buffer;
-    private int tupleCount;
-    private int tupleDataEndOffset;
-
-    public FixedSizeFrameTupleAppender(int frameSize, ITypeTraits[] fields) {
-        this.frameSize = frameSize;
-        int tmp = 0;
-        for (int i = 0; i < fields.length; i++) {
-            tmp += fields[i].getFixedLength();
-        }
-        tupleSize = tmp;
-    }
-
-    public void reset(ByteBuffer buffer, boolean clear) {
-        this.buffer = buffer;
-        if (clear) {
-            buffer.putInt(FrameHelper.getTupleCountOffset(frameSize), 0);
-            tupleCount = 0;
-            tupleDataEndOffset = 0;
-        }
-    }
-
-    public boolean append(byte[] bytes, int offset) {
-        if (tupleDataEndOffset + tupleSize + TUPLE_COUNT_SIZE <= frameSize) {
-            System.arraycopy(bytes, offset, buffer.array(), tupleDataEndOffset, tupleSize);
-            tupleDataEndOffset += tupleSize;
-            tupleCount++;
-            return true;
-        }
-        return false;
-    }
-
-    public boolean append(byte[] bytes, int offset, int length) {
-        if (tupleDataEndOffset + length + TUPLE_COUNT_SIZE <= frameSize) {
-            System.arraycopy(bytes, offset, buffer.array(), tupleDataEndOffset, length);
-            tupleDataEndOffset += length;
-            return true;
-        }
-        return false;
-    }
-
-    public boolean append(int fieldValue) {
-        if (tupleDataEndOffset + 4 + TUPLE_COUNT_SIZE <= frameSize) {
-            buffer.putInt(tupleDataEndOffset, fieldValue);
-            tupleDataEndOffset += 4;
-            tupleCount++;
-            return true;
-        }
-        return false;
-    }
-
-    public boolean append(long fieldValue) {
-        if (tupleDataEndOffset + 8 + TUPLE_COUNT_SIZE <= frameSize) {
-            buffer.putLong(tupleDataEndOffset, fieldValue);
-            tupleDataEndOffset += 8;
-            tupleCount++;
-            return true;
-        }
-        return false;
-    }
-
-    public boolean append(char fieldValue) {
-        if (tupleDataEndOffset + 2 + TUPLE_COUNT_SIZE <= frameSize) {
-            buffer.putLong(tupleDataEndOffset, fieldValue);
-            tupleDataEndOffset += 2;
-            tupleCount++;
-            return true;
-        }
-        return false;
-    }
-
-    public boolean append(byte fieldValue) {
-        if (tupleDataEndOffset + 1 + TUPLE_COUNT_SIZE <= frameSize) {
-            buffer.put(tupleDataEndOffset, fieldValue);
-            tupleDataEndOffset += 1;
-            tupleCount++;
-            return true;
-        }
-        return false;
-    }
-
-    // returns true if an entire tuple fits
-    // returns false otherwise
-    public boolean hasSpace() {
-        return tupleDataEndOffset + tupleSize + TUPLE_COUNT_SIZE <= frameSize;
-    }
-
-    public void incrementTupleCount(int count) {
-        buffer.putInt(FrameHelper.getTupleCountOffset(frameSize),
-                buffer.getInt(FrameHelper.getTupleCountOffset(frameSize)) + count);
-    }
-
-    public int getTupleCount() {
-        return tupleCount;
-    }
-
-    public ByteBuffer getBuffer() {
-        return buffer;
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeTupleReference.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeTupleReference.java
deleted file mode 100644
index 0656d69..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/FixedSizeTupleReference.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.impls;
-
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-
-public class FixedSizeTupleReference implements ITupleReference {
-
-    private final ITypeTraits[] typeTraits;
-    private final int[] fieldStartOffsets;
-    private byte[] data;
-    private int startOff;
-
-    public FixedSizeTupleReference(ITypeTraits[] typeTraits) {
-        this.typeTraits = typeTraits;
-        this.fieldStartOffsets = new int[typeTraits.length];
-        this.fieldStartOffsets[0] = 0;
-        for (int i = 1; i < typeTraits.length; i++) {
-            fieldStartOffsets[i] = fieldStartOffsets[i - 1] + typeTraits[i - 1].getFixedLength();
-        }
-    }
-
-    public void reset(byte[] data, int startOff) {
-        this.data = data;
-        this.startOff = startOff;
-    }
-
-    @Override
-    public int getFieldCount() {
-        return typeTraits.length;
-    }
-
-    @Override
-    public byte[] getFieldData(int fIdx) {
-        return data;
-    }
-
-    @Override
-    public int getFieldLength(int fIdx) {
-        return typeTraits[fIdx].getFixedLength();
-    }
-
-    @Override
-    public int getFieldStart(int fIdx) {
-        return startOff + fieldStartOffsets[fIdx];
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/InvertedIndex.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/InvertedIndex.java
deleted file mode 100644
index 3525fc3..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/InvertedIndex.java
+++ /dev/null
@@ -1,358 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.impls;
-
-import java.nio.ByteBuffer;
-
-import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.api.io.IIOManager;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
-import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
-import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoadContext;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
-import edu.uci.ics.hyracks.storage.am.common.api.IndexType;
-import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearcher;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedListBuilder;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedListCursor;
-import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
-import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
-import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
-
-/**
- * An inverted index consists of two files: 1. a file storing (paginated)
- * inverted lists 2. a BTree-file mapping from tokens to inverted lists.
- * Implemented features: bulk loading and searching (based on T-Occurrence) Not
- * implemented features: updates (insert/update/delete) Limitations: a query
- * cannot exceed the size of a Hyracks frame.
- */
-public class InvertedIndex implements IIndex {
-    private final IHyracksCommonContext ctx = new DefaultHyracksCommonContext();
-
-    private BTree btree;
-    private int rootPageId = 0;
-    private IBufferCache bufferCache;
-    private int fileId;
-    private final ITypeTraits[] invListTypeTraits;
-    private final IBinaryComparatorFactory[] invListCmpFactories;
-    private final IInvertedListBuilder invListBuilder;
-    private final int numTokenFields;
-    private final int numInvListKeys;
-
-    public InvertedIndex(IBufferCache bufferCache, BTree btree, ITypeTraits[] invListTypeTraits,
-            IBinaryComparatorFactory[] invListCmpFactories, IInvertedListBuilder invListBuilder) {
-        this.bufferCache = bufferCache;
-        this.btree = btree;
-        this.invListTypeTraits = invListTypeTraits;
-        this.invListCmpFactories = invListCmpFactories;
-        this.invListBuilder = invListBuilder;
-        this.numTokenFields = btree.getComparatorFactories().length;
-        this.numInvListKeys = invListCmpFactories.length;
-    }
-
-    @Override
-    public void open(int fileId) {
-        this.fileId = fileId;
-    }
-
-    @Override
-    public void create(int indexFileId) throws HyracksDataException {
-    }
-
-    @Override
-    public void close() {
-        this.fileId = -1;
-    }
-
-    public boolean openCursor(ITreeIndexCursor btreeCursor, RangePredicate btreePred, ITreeIndexAccessor btreeAccessor,
-            IInvertedListCursor invListCursor) throws HyracksDataException, IndexException {
-        btreeAccessor.search(btreeCursor, btreePred);
-        boolean ret = false;
-        try {
-            if (btreeCursor.hasNext()) {
-                btreeCursor.next();
-                ITupleReference frameTuple = btreeCursor.getTuple();
-                // Hardcoded mapping of btree fields
-                int startPageId = IntegerSerializerDeserializer.getInt(frameTuple.getFieldData(1),
-                        frameTuple.getFieldStart(1));
-                int endPageId = IntegerSerializerDeserializer.getInt(frameTuple.getFieldData(2),
-                        frameTuple.getFieldStart(2));
-                int startOff = IntegerSerializerDeserializer.getInt(frameTuple.getFieldData(3),
-                        frameTuple.getFieldStart(3));
-                int numElements = IntegerSerializerDeserializer.getInt(frameTuple.getFieldData(4),
-                        frameTuple.getFieldStart(4));
-                invListCursor.reset(startPageId, endPageId, startOff, numElements);
-                ret = true;
-            } else {
-                invListCursor.reset(0, 0, 0, 0);
-            }
-        } finally {
-            btreeCursor.close();
-            btreeCursor.reset();
-        }
-        return ret;
-    }
-
-    @Override
-    public IIndexBulkLoadContext beginBulkLoad(float fillFactor) throws TreeIndexException, HyracksDataException {
-        InvertedIndexBulkLoadContext ctx = new InvertedIndexBulkLoadContext(fillFactor);
-        ctx.init(rootPageId, fileId);
-        return ctx;
-    }
-
-    /**
-     * Assumptions:
-     * The first btree.getMultiComparator().getKeyFieldCount() fields in tuple
-     * are btree keys (e.g., a string token).
-     * The next invListCmp.getKeyFieldCount() fields in tuple are keys of the
-     * inverted list (e.g., primary key).
-     * Key fields of inverted list are fixed size.
-     */
-    @Override
-    public void bulkLoadAddTuple(ITupleReference tuple, IIndexBulkLoadContext ictx) throws HyracksDataException {
-        InvertedIndexBulkLoadContext ctx = (InvertedIndexBulkLoadContext) ictx;
-        boolean firstElement = ctx.lastTupleBuilder.getSize() == 0;
-        boolean startNewList = firstElement;
-        if (!firstElement) {
-            // If the current and the last token don't match, we start a new list.
-            ctx.lastTuple.reset(ctx.lastTupleBuilder.getFieldEndOffsets(), ctx.lastTupleBuilder.getByteArray());
-            startNewList = ctx.tokenCmp.compare(tuple, ctx.lastTuple) != 0;
-        }
-        if (startNewList) {
-            if (!firstElement) {
-                // Create entry in btree for last inverted list.
-                createAndInsertBTreeTuple(ctx);
-            }
-            if (!invListBuilder.startNewList(tuple, numTokenFields)) {
-                ctx.pinNextPage();
-                invListBuilder.setTargetBuffer(ctx.currentPage.getBuffer().array(), 0);
-                if (!invListBuilder.startNewList(tuple, numTokenFields)) {
-                    throw new IllegalStateException("Failed to create first inverted list.");
-                }
-            }
-            ctx.currentInvListStartPageId = ctx.currentPageId;
-            ctx.currentInvListStartOffset = invListBuilder.getPos();
-        } else {
-            if (ctx.invListCmp.compare(tuple, ctx.lastTuple, numTokenFields) == 0) {
-                // Duplicate inverted-list element.
-                return;
-            }
-        }
-
-        // Append to current inverted list.
-        if (!invListBuilder.appendElement(tuple, numTokenFields, numInvListKeys)) {
-            ctx.pinNextPage();
-            invListBuilder.setTargetBuffer(ctx.currentPage.getBuffer().array(), 0);
-            if (!invListBuilder.appendElement(tuple, numTokenFields, numInvListKeys)) {
-                throw new IllegalStateException(
-                        "Failed to append element to inverted list after switching to a new page.");
-            }
-        }
-
-        // Remember last tuple by creating a copy.
-        // TODO: This portion can be optimized by only copying the token when it changes, and using the last appended inverted-list element as a reference.
-        ctx.lastTupleBuilder.reset();
-        for (int i = 0; i < tuple.getFieldCount(); i++) {
-            ctx.lastTupleBuilder.addField(tuple.getFieldData(i), tuple.getFieldStart(i), tuple.getFieldLength(i));
-        }
-    }
-
-    private void createAndInsertBTreeTuple(InvertedIndexBulkLoadContext ctx) throws HyracksDataException {
-        // Build tuple.        
-        ctx.btreeTupleBuilder.reset();
-        ctx.btreeTupleBuilder.addField(ctx.lastTuple.getFieldData(0), ctx.lastTuple.getFieldStart(0),
-                ctx.lastTuple.getFieldLength(0));
-        ctx.btreeTupleBuilder.addField(IntegerSerializerDeserializer.INSTANCE, ctx.currentInvListStartPageId);
-        ctx.btreeTupleBuilder.addField(IntegerSerializerDeserializer.INSTANCE, ctx.currentPageId);
-        ctx.btreeTupleBuilder.addField(IntegerSerializerDeserializer.INSTANCE, ctx.currentInvListStartOffset);
-        ctx.btreeTupleBuilder.addField(IntegerSerializerDeserializer.INSTANCE, invListBuilder.getListSize());
-        // Reset tuple reference and add it.
-        ctx.btreeTupleReference.reset(ctx.btreeTupleBuilder.getFieldEndOffsets(), ctx.btreeTupleBuilder.getByteArray());
-        btree.bulkLoadAddTuple(ctx.btreeTupleReference, ctx.btreeBulkLoadCtx);
-    }
-
-    @Override
-    public void endBulkLoad(IIndexBulkLoadContext ictx) throws HyracksDataException {
-        // Create entry in btree for last inverted list.
-        InvertedIndexBulkLoadContext ctx = (InvertedIndexBulkLoadContext) ictx;
-        if (ctx.lastTuple.getFieldData(0) != null) {
-            createAndInsertBTreeTuple(ctx);
-        }
-        btree.endBulkLoad(ctx.btreeBulkLoadCtx);
-        ctx.deinit();
-    }
-
-    public final class InvertedIndexBulkLoadContext implements IIndexBulkLoadContext {
-        private final ArrayTupleBuilder btreeTupleBuilder;
-        private final ArrayTupleReference btreeTupleReference;
-        private final float btreeFillFactor;
-        private IIndexBulkLoadContext btreeBulkLoadCtx;
-
-        private int currentInvListStartPageId;
-        private int currentInvListStartOffset;
-        private final ArrayTupleBuilder lastTupleBuilder;
-        private final ArrayTupleReference lastTuple;
-
-        private int currentPageId;
-        private ICachedPage currentPage;
-        private final MultiComparator tokenCmp;
-        private final MultiComparator invListCmp;
-
-        public InvertedIndexBulkLoadContext(float btreeFillFactor) {
-            this.tokenCmp = MultiComparator.create(btree.getComparatorFactories());
-            this.invListCmp = MultiComparator.create(invListCmpFactories);
-            this.btreeTupleBuilder = new ArrayTupleBuilder(btree.getFieldCount());
-            this.btreeTupleReference = new ArrayTupleReference();
-            this.btreeFillFactor = btreeFillFactor;
-            this.lastTupleBuilder = new ArrayTupleBuilder(numTokenFields + numInvListKeys);
-            this.lastTuple = new ArrayTupleReference();
-        }
-
-        public void init(int startPageId, int fileId) throws HyracksDataException, TreeIndexException {
-            btreeBulkLoadCtx = btree.beginBulkLoad(btreeFillFactor);
-            currentPageId = startPageId;
-            currentPage = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, currentPageId), true);
-            currentPage.acquireWriteLatch();
-            invListBuilder.setTargetBuffer(currentPage.getBuffer().array(), 0);
-        }
-
-        public void deinit() throws HyracksDataException {
-            if (currentPage != null) {
-                currentPage.releaseWriteLatch();
-                bufferCache.unpin(currentPage);
-            }
-        }
-
-        public void pinNextPage() throws HyracksDataException {
-            currentPage.releaseWriteLatch();
-            bufferCache.unpin(currentPage);
-            currentPageId++;
-            currentPage = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, currentPageId), true);
-            currentPage.acquireWriteLatch();
-        }
-    }
-
-    @Override
-    public IBufferCache getBufferCache() {
-        return bufferCache;
-    }
-
-    public int getInvListsFileId() {
-        return fileId;
-    }
-
-    public IBinaryComparatorFactory[] getInvListElementCmpFactories() {
-        return invListCmpFactories;
-    }
-
-    public ITypeTraits[] getTypeTraits() {
-        return invListTypeTraits;
-    }
-
-    public BTree getBTree() {
-        return btree;
-    }
-
-    public class InvertedIndexAccessor implements IIndexAccessor {
-        private final IInvertedIndexSearcher searcher;
-
-        public InvertedIndexAccessor(InvertedIndex index) {
-            this.searcher = new TOccurrenceSearcher(ctx, index);
-        }
-
-        @Override
-        public void insert(ITupleReference tuple) throws HyracksDataException, IndexException {
-            // TODO Auto-generated method stub
-        }
-
-        @Override
-        public void update(ITupleReference tuple) throws HyracksDataException, IndexException {
-            // TODO Auto-generated method stub
-        }
-
-        @Override
-        public void delete(ITupleReference tuple) throws HyracksDataException, IndexException {
-            // TODO Auto-generated method stub
-        }
-
-        @Override
-        public void upsert(ITupleReference tuple) throws HyracksDataException, TreeIndexException {
-            // TODO Auto-generated method stub
-        }
-
-        @Override
-        public IIndexCursor createSearchCursor() {
-            return new InvertedIndexSearchCursor(searcher);
-        }
-
-        @Override
-        public void search(IIndexCursor cursor, ISearchPredicate searchPred) throws HyracksDataException,
-                IndexException {
-            searcher.search((InvertedIndexSearchCursor) cursor, (InvertedIndexSearchPredicate) searchPred);
-        }
-
-        public IInvertedIndexSearcher getSearcher() {
-            return searcher;
-        }
-    }
-
-    @Override
-    public IIndexAccessor createAccessor() {
-        return new InvertedIndexAccessor(this);
-    }
-
-    @Override
-    public IndexType getIndexType() {
-        return IndexType.INVERTED;
-    }
-
-    // This is just a dummy hyracks context for allocating frames for temporary
-    // results during inverted index searches.
-    // TODO: In the future we should use the real HyracksTaskContext to track
-    // frame usage.
-    private class DefaultHyracksCommonContext implements IHyracksCommonContext {
-        private final int FRAME_SIZE = 32768;
-
-        @Override
-        public int getFrameSize() {
-            return FRAME_SIZE;
-        }
-
-        @Override
-        public IIOManager getIOManager() {
-            return null;
-        }
-
-        @Override
-        public ByteBuffer allocateFrame() {
-            return ByteBuffer.allocate(FRAME_SIZE);
-        }
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/InvertedIndexException.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/InvertedIndexException.java
deleted file mode 100644
index 9762a74..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/InvertedIndexException.java
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.impls;
-
-import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
-
-public class InvertedIndexException extends IndexException {
-    private static final long serialVersionUID = 1L;
-
-    public InvertedIndexException(String msg) {
-        super(msg);
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/InvertedIndexSearchCursor.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/InvertedIndexSearchCursor.java
deleted file mode 100644
index 1eeb576..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/InvertedIndexSearchCursor.java
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.impls;
-
-import java.nio.ByteBuffer;
-import java.util.List;
-
-import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearcher;
-
-public class InvertedIndexSearchCursor implements IIndexCursor {
-
-    private List<ByteBuffer> resultBuffers;
-    private int numResultBuffers;
-    private int currentBufferIndex = 0;
-    private int tupleIndex = 0;
-    private final IInvertedIndexSearcher invIndexSearcher;
-    private final IFrameTupleAccessor fta;
-    private final FixedSizeTupleReference resultTuple;
-    
-    public InvertedIndexSearchCursor(IInvertedIndexSearcher invIndexSearcher) {
-        this.invIndexSearcher = invIndexSearcher;
-        this.fta = invIndexSearcher.createResultFrameTupleAccessor();
-        this.resultTuple = (FixedSizeTupleReference) invIndexSearcher.createResultTupleReference();
-    }
-
-    @Override
-    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws HyracksDataException {
-        currentBufferIndex = 0;
-        tupleIndex = 0;
-        resultBuffers = invIndexSearcher.getResultBuffers();
-        numResultBuffers = invIndexSearcher.getNumValidResultBuffers();
-        if (numResultBuffers > 0) {
-            fta.reset(resultBuffers.get(0));
-        }
-    }
-    
-    @Override
-    public boolean hasNext() {
-        if (currentBufferIndex < numResultBuffers && tupleIndex < fta.getTupleCount()) {
-            return true;
-        } else {
-            return false;
-        }
-    }
-
-    @Override
-    public void next() {
-        resultTuple.reset(fta.getBuffer().array(), fta.getTupleStartOffset(tupleIndex));
-        tupleIndex++;
-        if (tupleIndex >= fta.getTupleCount()) {
-            if (currentBufferIndex + 1 < numResultBuffers) {
-                currentBufferIndex++;
-                fta.reset(resultBuffers.get(currentBufferIndex));
-                tupleIndex = 0;
-            }
-        }
-    }
-
-    @Override
-    public ITupleReference getTuple() {
-        return resultTuple;
-    }
-
-    @Override
-    public void reset() {
-        currentBufferIndex = 0;
-        tupleIndex = 0;
-        invIndexSearcher.reset();
-        resultBuffers = invIndexSearcher.getResultBuffers();
-        numResultBuffers = invIndexSearcher.getNumValidResultBuffers();
-    }
-
-    @Override
-    public void close() throws HyracksDataException {
-        currentBufferIndex = 0;
-        tupleIndex = 0;
-        resultBuffers = null;
-        numResultBuffers = 0;
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/InvertedIndexSearchPredicate.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/InvertedIndexSearchPredicate.java
deleted file mode 100644
index 9e9a2c3..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/InvertedIndexSearchPredicate.java
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.impls;
-
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifier;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizer;
-
-public class InvertedIndexSearchPredicate implements ISearchPredicate {
-    private static final long serialVersionUID = 1L;
-
-    private ITupleReference queryTuple;
-    private int queryFieldIndex;
-    private final IBinaryTokenizer queryTokenizer;
-    private final IInvertedIndexSearchModifier searchModifier;    
-    
-    public InvertedIndexSearchPredicate(IBinaryTokenizer queryTokenizer, IInvertedIndexSearchModifier searchModifier) {
-        this.queryTokenizer = queryTokenizer;
-        this.searchModifier = searchModifier;
-    }
-    
-    public void setQueryTuple(ITupleReference queryTuple) {
-        this.queryTuple = queryTuple;
-    }
-    
-    public ITupleReference getQueryTuple() {
-        return queryTuple;
-    }
-    
-    public void setQueryFieldIndex(int queryFieldIndex) {
-        this.queryFieldIndex = queryFieldIndex;
-    }
-    
-    public int getQueryFieldIndex() {
-        return queryFieldIndex;
-    }
-    
-    public IInvertedIndexSearchModifier getSearchModifier() {
-        return searchModifier;
-    }
-    
-    public IBinaryTokenizer getQueryTokenizer() {
-        return queryTokenizer;
-    }
-    
-    @Override
-    public MultiComparator getLowKeyComparator() {
-        // TODO: This doesn't make sense for an inverted index. Change ISearchPredicate interface.
-        return null;
-    }
-
-    @Override
-    public MultiComparator getHighKeyComparator() {
-        // TODO: This doesn't make sense for an inverted index. Change ISearchPredicate interface.
-        return null;
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/OccurrenceThresholdPanicException.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/OccurrenceThresholdPanicException.java
deleted file mode 100644
index b0e737c..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/OccurrenceThresholdPanicException.java
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.impls;
-
-public class OccurrenceThresholdPanicException extends InvertedIndexException {
-    private static final long serialVersionUID = 1L;
-
-    public OccurrenceThresholdPanicException(String msg) {
-        super(msg);
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/TOccurrenceSearcher.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/TOccurrenceSearcher.java
deleted file mode 100644
index af5dad3..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/TOccurrenceSearcher.java
+++ /dev/null
@@ -1,547 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.impls;
-
-import java.io.IOException;
-import java.nio.ByteBuffer;
-import java.util.ArrayList;
-import java.util.List;
-
-import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
-import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
-import edu.uci.ics.hyracks.data.std.util.GrowableArray;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
-import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeRangeSearchCursor;
-import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
-import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifier;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearcher;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedListCursor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizer;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IToken;
-
-// TODO: The search procedure is rather confusing regarding cursor positions, hasNext() calls etc.
-// Needs an overhaul some time.
-public class TOccurrenceSearcher implements IInvertedIndexSearcher {
-
-    protected final IHyracksCommonContext ctx;
-    protected final FixedSizeFrameTupleAppender resultFrameTupleApp;
-    protected final FixedSizeFrameTupleAccessor resultFrameTupleAcc;
-    protected final FixedSizeTupleReference resultTuple;
-    protected final int invListKeyLength;
-    protected int currentNumResults;
-
-    protected List<ByteBuffer> newResultBuffers = new ArrayList<ByteBuffer>();
-    protected List<ByteBuffer> prevResultBuffers = new ArrayList<ByteBuffer>();
-    protected List<ByteBuffer> swap = null;
-    protected int maxResultBufIdx = 0;
-
-    protected final ITreeIndexFrame leafFrame;
-    protected final ITreeIndexFrame interiorFrame;
-    protected final ITreeIndexCursor btreeCursor;
-    protected final FrameTupleReference searchKey = new FrameTupleReference();
-    protected final RangePredicate btreePred = new RangePredicate(null, null, true, true, null, null);
-    protected final ITreeIndexAccessor btreeAccessor;
-
-    protected RecordDescriptor queryTokenRecDesc = new RecordDescriptor(
-            new ISerializerDeserializer[] { UTF8StringSerializerDeserializer.INSTANCE });
-    protected ArrayTupleBuilder queryTokenBuilder = new ArrayTupleBuilder(queryTokenRecDesc.getFieldCount());
-    protected GrowableArray queryTokenFieldData = queryTokenBuilder.getFieldData();
-    protected FrameTupleAppender queryTokenAppender;
-    protected ByteBuffer queryTokenFrame;
-
-    protected final InvertedIndex invIndex;
-    protected final MultiComparator invListCmp;
-    protected final ITypeTraits[] invListFieldsWithCount;
-    protected int occurrenceThreshold;
-
-    protected final int cursorCacheSize = 10;
-    protected List<IInvertedListCursor> invListCursorCache = new ArrayList<IInvertedListCursor>(cursorCacheSize);
-    protected List<IInvertedListCursor> invListCursors = new ArrayList<IInvertedListCursor>(cursorCacheSize);
-
-    public TOccurrenceSearcher(IHyracksCommonContext ctx, InvertedIndex invIndex) {
-        this.ctx = ctx;
-        this.invIndex = invIndex;
-        this.invListCmp = MultiComparator.create(invIndex.getInvListElementCmpFactories());
-
-        leafFrame = invIndex.getBTree().getLeafFrameFactory().createFrame();
-        interiorFrame = invIndex.getBTree().getInteriorFrameFactory().createFrame();
-
-        btreeCursor = new BTreeRangeSearchCursor((IBTreeLeafFrame) leafFrame, false);
-        ITypeTraits[] invListFields = invIndex.getTypeTraits();
-        invListFieldsWithCount = new ITypeTraits[invListFields.length + 1];
-        int tmp = 0;
-        for (int i = 0; i < invListFields.length; i++) {
-            invListFieldsWithCount[i] = invListFields[i];
-            tmp += invListFields[i].getFixedLength();
-        }
-        // using an integer for counting occurrences
-        invListFieldsWithCount[invListFields.length] = IntegerPointable.TYPE_TRAITS;
-        invListKeyLength = tmp;
-
-        resultFrameTupleApp = new FixedSizeFrameTupleAppender(ctx.getFrameSize(), invListFieldsWithCount);
-        resultFrameTupleAcc = new FixedSizeFrameTupleAccessor(ctx.getFrameSize(), invListFieldsWithCount);
-        resultTuple = new FixedSizeTupleReference(invListFieldsWithCount);
-        newResultBuffers.add(ctx.allocateFrame());
-        prevResultBuffers.add(ctx.allocateFrame());
-
-        MultiComparator searchCmp = MultiComparator.create(invIndex.getBTree().getComparatorFactories());
-        btreePred.setLowKeyComparator(searchCmp);
-        btreePred.setHighKeyComparator(searchCmp);
-        btreePred.setLowKey(searchKey, true);
-        btreePred.setHighKey(searchKey, true);
-
-        // pre-create cursor objects
-        for (int i = 0; i < cursorCacheSize; i++) {
-            invListCursorCache.add(new FixedSizeElementInvertedListCursor(invIndex.getBufferCache(), invIndex
-                    .getInvListsFileId(), invIndex.getTypeTraits()));
-        }
-
-        queryTokenAppender = new FrameTupleAppender(ctx.getFrameSize());
-        queryTokenFrame = ctx.allocateFrame();
-
-        btreeAccessor = invIndex.getBTree().createAccessor();
-        currentNumResults = 0;
-    }
-
-    public void reset() {
-        for (ByteBuffer b : newResultBuffers) {
-            resultFrameTupleApp.reset(b, true);
-        }
-        for (ByteBuffer b : prevResultBuffers) {
-            resultFrameTupleApp.reset(b, true);
-        }
-        currentNumResults = 0;
-    }
-
-    public void search(InvertedIndexSearchCursor resultCursor, InvertedIndexSearchPredicate searchPred) throws HyracksDataException, IndexException {
-        ITupleReference queryTuple = searchPred.getQueryTuple();
-        int queryFieldIndex = searchPred.getQueryFieldIndex();
-        IInvertedIndexSearchModifier searchModifier = searchPred.getSearchModifier();
-        IBinaryTokenizer queryTokenizer = searchPred.getQueryTokenizer();
-        
-        queryTokenAppender.reset(queryTokenFrame, true);                
-        queryTokenizer.reset(queryTuple.getFieldData(queryFieldIndex), queryTuple.getFieldStart(queryFieldIndex),
-                queryTuple.getFieldLength(queryFieldIndex));
-
-        while (queryTokenizer.hasNext()) {
-            queryTokenizer.next();
-            queryTokenBuilder.reset();
-            try {
-                IToken token = queryTokenizer.getToken();
-                token.serializeToken(queryTokenFieldData);
-                queryTokenBuilder.addFieldEndOffset();
-                // WARNING: assuming one frame is big enough to hold all tokens
-                queryTokenAppender.append(queryTokenBuilder.getFieldEndOffsets(), queryTokenBuilder.getByteArray(), 0,
-                        queryTokenBuilder.getSize());
-            } catch (IOException e) {
-                throw new HyracksDataException(e);
-            }
-        }
-
-        FrameTupleAccessor queryTokenAccessor = new FrameTupleAccessor(ctx.getFrameSize(), queryTokenRecDesc);
-        queryTokenAccessor.reset(queryTokenFrame);
-        int numQueryTokens = queryTokenAccessor.getTupleCount();
-
-        // expand cursor cache if necessary
-        if (numQueryTokens > invListCursorCache.size()) {
-            int diff = numQueryTokens - invListCursorCache.size();
-            for (int i = 0; i < diff; i++) {
-                invListCursorCache.add(new FixedSizeElementInvertedListCursor(invIndex.getBufferCache(), invIndex
-                        .getInvListsFileId(), invIndex.getTypeTraits()));
-            }
-        }
-
-        invListCursors.clear();
-        for (int i = 0; i < numQueryTokens; i++) {
-            searchKey.reset(queryTokenAccessor, i);
-            invIndex.openCursor(btreeCursor, btreePred, btreeAccessor, invListCursorCache.get(i));
-            invListCursors.add(invListCursorCache.get(i));
-        }
-
-        occurrenceThreshold = searchModifier.getOccurrenceThreshold(invListCursors);
-
-        // TODO: deal with panic cases properly
-        if (occurrenceThreshold <= 0) {
-            throw new OccurrenceThresholdPanicException("Merge Threshold is <= 0. Failing Search.");
-        }
-
-        int numPrefixLists = searchModifier.getPrefixLists(invListCursors);
-        maxResultBufIdx = mergePrefixLists(numPrefixLists, numQueryTokens);
-        maxResultBufIdx = mergeSuffixLists(numPrefixLists, numQueryTokens, maxResultBufIdx);
-
-        resultCursor.open(null, searchPred);
-    }
-
-    protected int mergePrefixLists(int numPrefixTokens, int numQueryTokens) throws HyracksDataException {
-        int maxPrevBufIdx = 0;
-        for (int i = 0; i < numPrefixTokens; i++) {
-            swap = prevResultBuffers;
-            prevResultBuffers = newResultBuffers;
-            newResultBuffers = swap;
-            currentNumResults = 0;
-
-            invListCursors.get(i).pinPagesSync();
-            maxPrevBufIdx = mergePrefixList(invListCursors.get(i), prevResultBuffers, maxPrevBufIdx, newResultBuffers);
-            invListCursors.get(i).unpinPages();
-        }
-        return maxPrevBufIdx;
-    }
-
-    protected int mergeSuffixLists(int numPrefixTokens, int numQueryTokens, int maxPrevBufIdx) throws HyracksDataException {
-        for (int i = numPrefixTokens; i < numQueryTokens; i++) {
-            swap = prevResultBuffers;
-            prevResultBuffers = newResultBuffers;
-            newResultBuffers = swap;
-
-            invListCursors.get(i).pinPagesSync();
-            int numInvListElements = invListCursors.get(i).getNumElements();
-            // should we binary search the next list or should we sort-merge it?
-            if (currentNumResults * Math.log(numInvListElements) < currentNumResults + numInvListElements) {
-                maxPrevBufIdx = mergeSuffixListProbe(invListCursors.get(i), prevResultBuffers, maxPrevBufIdx,
-                        newResultBuffers, i, numQueryTokens);
-            } else {
-                maxPrevBufIdx = mergeSuffixListScan(invListCursors.get(i), prevResultBuffers, maxPrevBufIdx,
-                        newResultBuffers, i, numQueryTokens);
-            }
-            invListCursors.get(i).unpinPages();
-        }
-        return maxPrevBufIdx;
-    }
-
-    protected int mergeSuffixListProbe(IInvertedListCursor invListCursor, List<ByteBuffer> prevResultBuffers,
-            int maxPrevBufIdx, List<ByteBuffer> newResultBuffers, int invListIx, int numQueryTokens) {
-
-        int newBufIdx = 0;
-        ByteBuffer newCurrentBuffer = newResultBuffers.get(0);
-
-        int prevBufIdx = 0;
-        ByteBuffer prevCurrentBuffer = prevResultBuffers.get(0);
-
-        int resultTidx = 0;
-
-        currentNumResults = 0;
-
-        resultFrameTupleAcc.reset(prevCurrentBuffer);
-        resultFrameTupleApp.reset(newCurrentBuffer, true);
-
-        while (resultTidx < resultFrameTupleAcc.getTupleCount()) {
-
-            resultTuple.reset(prevCurrentBuffer.array(), resultFrameTupleAcc.getTupleStartOffset(resultTidx));
-            int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
-                    resultTuple.getFieldStart(resultTuple.getFieldCount() - 1));
-
-            if (invListCursor.containsKey(resultTuple, invListCmp)) {
-                count++;
-                newBufIdx = appendTupleToNewResults(resultTuple, count, newBufIdx);
-            } else {
-                if (count + numQueryTokens - invListIx > occurrenceThreshold) {
-                    newBufIdx = appendTupleToNewResults(resultTuple, count, newBufIdx);
-                }
-            }
-
-            resultTidx++;
-            if (resultTidx >= resultFrameTupleAcc.getTupleCount()) {
-                prevBufIdx++;
-                if (prevBufIdx <= maxPrevBufIdx) {
-                    prevCurrentBuffer = prevResultBuffers.get(prevBufIdx);
-                    resultFrameTupleAcc.reset(prevCurrentBuffer);
-                    resultTidx = 0;
-                }
-            }
-        }
-
-        return newBufIdx;
-    }
-
-    protected int mergeSuffixListScan(IInvertedListCursor invListCursor, List<ByteBuffer> prevResultBuffers,
-            int maxPrevBufIdx, List<ByteBuffer> newResultBuffers, int invListIx, int numQueryTokens) {
-        int newBufIdx = 0;
-        ByteBuffer newCurrentBuffer = newResultBuffers.get(0);
-
-        int prevBufIdx = 0;
-        ByteBuffer prevCurrentBuffer = prevResultBuffers.get(0);
-
-        boolean advanceCursor = true;
-        boolean advancePrevResult = false;
-        int resultTidx = 0;
-        currentNumResults = 0;
-        
-        resultFrameTupleAcc.reset(prevCurrentBuffer);
-        resultFrameTupleApp.reset(newCurrentBuffer, true);
-
-        int invListTidx = 0;
-        int invListNumTuples = invListCursor.getNumElements();
-
-        if (invListCursor.hasNext())
-            invListCursor.next();
-
-        while (invListTidx < invListNumTuples && resultTidx < resultFrameTupleAcc.getTupleCount()) {
-
-            ITupleReference invListTuple = invListCursor.getTuple();
-
-            resultTuple.reset(prevCurrentBuffer.array(), resultFrameTupleAcc.getTupleStartOffset(resultTidx));
-
-            int cmp = invListCmp.compare(invListTuple, resultTuple);
-            if (cmp == 0) {
-                int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
-                        resultTuple.getFieldStart(resultTuple.getFieldCount() - 1)) + 1;
-                newBufIdx = appendTupleToNewResults(resultTuple, count, newBufIdx);
-                advanceCursor = true;
-                advancePrevResult = true;
-            } else {
-                if (cmp < 0) {
-                    advanceCursor = true;
-                    advancePrevResult = false;
-                } else {
-                    int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
-                            resultTuple.getFieldStart(resultTuple.getFieldCount() - 1));
-                    if (count + numQueryTokens - invListIx > occurrenceThreshold) {
-                        newBufIdx = appendTupleToNewResults(resultTuple, count, newBufIdx);
-                    }
-                    advanceCursor = false;
-                    advancePrevResult = true;
-                }
-            }
-
-            if (advancePrevResult) {
-                resultTidx++;
-                if (resultTidx >= resultFrameTupleAcc.getTupleCount()) {
-                    prevBufIdx++;
-                    if (prevBufIdx <= maxPrevBufIdx) {
-                        prevCurrentBuffer = prevResultBuffers.get(prevBufIdx);
-                        resultFrameTupleAcc.reset(prevCurrentBuffer);
-                        resultTidx = 0;
-                    }
-                }
-            }
-
-            if (advanceCursor) {
-                invListTidx++;
-                if (invListCursor.hasNext()) {
-                	invListCursor.next();
-                }
-            }
-        }
-
-        // append remaining elements from previous result set
-        while (resultTidx < resultFrameTupleAcc.getTupleCount()) {
-
-            resultTuple.reset(prevCurrentBuffer.array(), resultFrameTupleAcc.getTupleStartOffset(resultTidx));
-
-            int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
-                    resultTuple.getFieldStart(resultTuple.getFieldCount() - 1));
-            if (count + numQueryTokens - invListIx > occurrenceThreshold) {
-                newBufIdx = appendTupleToNewResults(resultTuple, count, newBufIdx);
-            }
-
-            resultTidx++;
-            if (resultTidx >= resultFrameTupleAcc.getTupleCount()) {
-                prevBufIdx++;
-                if (prevBufIdx <= maxPrevBufIdx) {
-                    prevCurrentBuffer = prevResultBuffers.get(prevBufIdx);
-                    resultFrameTupleAcc.reset(prevCurrentBuffer);
-                    resultTidx = 0;
-                }
-            }
-        }
-
-        return newBufIdx;
-    }
-
-    protected int mergePrefixList(IInvertedListCursor invListCursor, List<ByteBuffer> prevResultBuffers,
-            int maxPrevBufIdx, List<ByteBuffer> newResultBuffers) {
-        int newBufIdx = 0;
-        ByteBuffer newCurrentBuffer = newResultBuffers.get(0);
-
-        int prevBufIdx = 0;
-        ByteBuffer prevCurrentBuffer = prevResultBuffers.get(0);
-
-        boolean advanceCursor = true;
-        boolean advancePrevResult = false;
-        int resultTidx = 0;
-
-        resultFrameTupleAcc.reset(prevCurrentBuffer);
-        resultFrameTupleApp.reset(newCurrentBuffer, true);
-
-        int invListTidx = 0;
-        int invListNumTuples = invListCursor.getNumElements();
-
-        if (invListCursor.hasNext())
-            invListCursor.next();
-
-        while (invListTidx < invListNumTuples && resultTidx < resultFrameTupleAcc.getTupleCount()) {
-
-            ITupleReference invListTuple = invListCursor.getTuple();
-            resultTuple.reset(prevCurrentBuffer.array(), resultFrameTupleAcc.getTupleStartOffset(resultTidx));
-
-            int cmp = invListCmp.compare(invListTuple, resultTuple);
-            if (cmp == 0) {
-                int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
-                        resultTuple.getFieldStart(resultTuple.getFieldCount() - 1)) + 1;
-                newBufIdx = appendTupleToNewResults(resultTuple, count, newBufIdx);
-                advanceCursor = true;
-                advancePrevResult = true;
-            } else {
-                if (cmp < 0) {
-                    int count = 1;
-                    newBufIdx = appendTupleToNewResults(invListTuple, count, newBufIdx);
-                    advanceCursor = true;
-                    advancePrevResult = false;
-                } else {
-                    int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
-                            resultTuple.getFieldStart(resultTuple.getFieldCount() - 1));
-                    newBufIdx = appendTupleToNewResults(resultTuple, count, newBufIdx);
-                    advanceCursor = false;
-                    advancePrevResult = true;
-                }
-            }
-
-            if (advancePrevResult) {
-                resultTidx++;
-                if (resultTidx >= resultFrameTupleAcc.getTupleCount()) {
-                    prevBufIdx++;
-                    if (prevBufIdx <= maxPrevBufIdx) {
-                        prevCurrentBuffer = prevResultBuffers.get(prevBufIdx);
-                        resultFrameTupleAcc.reset(prevCurrentBuffer);
-                        resultTidx = 0;
-                    }
-                }
-            }
-
-            if (advanceCursor) {
-                invListTidx++;
-                if (invListCursor.hasNext()) {
-                	invListCursor.next();
-                }
-            }
-        }
-
-        // append remaining new elements from inverted list
-        while (invListTidx < invListNumTuples) {
-            ITupleReference invListTuple = invListCursor.getTuple();
-            newBufIdx = appendTupleToNewResults(invListTuple, 1, newBufIdx);
-            invListTidx++;
-            if (invListCursor.hasNext()) {
-                invListCursor.next();
-            }
-        }
-
-        // append remaining elements from previous result set
-        while (resultTidx < resultFrameTupleAcc.getTupleCount()) {
-
-            resultTuple.reset(prevCurrentBuffer.array(), resultFrameTupleAcc.getTupleStartOffset(resultTidx));
-
-            int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
-                    resultTuple.getFieldStart(resultTuple.getFieldCount() - 1));
-            newBufIdx = appendTupleToNewResults(resultTuple, count, newBufIdx);
-
-            resultTidx++;
-            if (resultTidx >= resultFrameTupleAcc.getTupleCount()) {
-                prevBufIdx++;
-                if (prevBufIdx <= maxPrevBufIdx) {
-                    prevCurrentBuffer = prevResultBuffers.get(prevBufIdx);
-                    resultFrameTupleAcc.reset(prevCurrentBuffer);
-                    resultTidx = 0;
-                }
-            }
-        }
-
-        return newBufIdx;
-    }
-
-    protected int appendTupleToNewResults(ITupleReference tuple, int newCount, int newBufIdx) {
-        ByteBuffer newCurrentBuffer = newResultBuffers.get(newBufIdx);
-
-        if (!resultFrameTupleApp.hasSpace()) {
-            newBufIdx++;
-            if (newBufIdx >= newResultBuffers.size()) {
-                newResultBuffers.add(ctx.allocateFrame());
-            }
-            newCurrentBuffer = newResultBuffers.get(newBufIdx);
-            resultFrameTupleApp.reset(newCurrentBuffer, true);
-        }
-
-        // append key
-        if (!resultFrameTupleApp.append(tuple.getFieldData(0), tuple.getFieldStart(0), invListKeyLength)) {
-            throw new IllegalStateException();
-        }
-
-        // append new count
-        if (!resultFrameTupleApp.append(newCount)) {
-            throw new IllegalStateException();
-        }
-
-        resultFrameTupleApp.incrementTupleCount(1);
-
-        currentNumResults++;
-
-        return newBufIdx;
-    }
-
-    public IFrameTupleAccessor createResultFrameTupleAccessor() {
-        return new FixedSizeFrameTupleAccessor(ctx.getFrameSize(), invListFieldsWithCount);
-    }
-
-    public ITupleReference createResultTupleReference() {
-        return new FixedSizeTupleReference(invListFieldsWithCount);
-    }
-
-    @Override
-    public List<ByteBuffer> getResultBuffers() {
-        return newResultBuffers;
-    }
-
-    @Override
-    public int getNumValidResultBuffers() {
-        return maxResultBufIdx + 1;
-    }
-
-    public int getOccurrenceThreshold() {
-        return occurrenceThreshold;
-    }
-    
-    public void printNewResults(int maxResultBufIdx) {
-        StringBuffer strBuffer = new StringBuffer();
-        for (int i = 0; i <= maxResultBufIdx; i++) {
-            ByteBuffer testBuf = newResultBuffers.get(i);
-            resultFrameTupleAcc.reset(testBuf);
-            for (int j = 0; j < resultFrameTupleAcc.getTupleCount(); j++) {
-                strBuffer.append(IntegerSerializerDeserializer.getInt(resultFrameTupleAcc.getBuffer().array(),
-                        resultFrameTupleAcc.getFieldStartOffset(j, 0)) + ",");
-                strBuffer.append(IntegerSerializerDeserializer.getInt(resultFrameTupleAcc.getBuffer().array(),
-                        resultFrameTupleAcc.getFieldStartOffset(j, 1)) + " ");
-            }
-        }
-        System.out.println(strBuffer.toString());
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/TOccurrenceSearcherSuffixProbeOnly.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/TOccurrenceSearcherSuffixProbeOnly.java
deleted file mode 100644
index 957ecc0..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/TOccurrenceSearcherSuffixProbeOnly.java
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.impls;
-
-import java.nio.ByteBuffer;
-import java.util.List;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedListCursor;
-
-public class TOccurrenceSearcherSuffixProbeOnly extends TOccurrenceSearcher {
-
-	protected final MultiComparator invListCmp;
-	
-    public TOccurrenceSearcherSuffixProbeOnly(IHyracksTaskContext ctx, InvertedIndex invIndex) {
-        super(ctx, invIndex);
-        this.invListCmp = MultiComparator.create(invIndex.getInvListElementCmpFactories());
-    }
-
-    protected int mergeSuffixLists(int numPrefixTokens, int numQueryTokens, int maxPrevBufIdx) throws HyracksDataException {
-        for (int i = numPrefixTokens; i < numQueryTokens; i++) {
-            swap = prevResultBuffers;
-            prevResultBuffers = newResultBuffers;
-            newResultBuffers = swap;
-            currentNumResults = 0;
-
-            invListCursors.get(i).pinPagesSync();
-            maxPrevBufIdx = mergeSuffixListProbe(invListCursors.get(i), prevResultBuffers, maxPrevBufIdx,
-                    newResultBuffers, i, numQueryTokens);
-            invListCursors.get(i).unpinPages();
-        }
-        return maxPrevBufIdx;
-    }
-
-    protected int mergeSuffixListProbe(IInvertedListCursor invListCursor, List<ByteBuffer> prevResultBuffers,
-            int maxPrevBufIdx, List<ByteBuffer> newResultBuffers, int invListIx, int numQueryTokens) {
-
-        int newBufIdx = 0;
-        ByteBuffer newCurrentBuffer = newResultBuffers.get(0);
-
-        int prevBufIdx = 0;
-        ByteBuffer prevCurrentBuffer = prevResultBuffers.get(0);
-
-        int resultTidx = 0;
-
-        resultFrameTupleAcc.reset(prevCurrentBuffer);
-        resultFrameTupleApp.reset(newCurrentBuffer, true);
-
-        while (resultTidx < resultFrameTupleAcc.getTupleCount()) {
-
-            resultTuple.reset(prevCurrentBuffer.array(), resultFrameTupleAcc.getTupleStartOffset(resultTidx));
-            int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
-                    resultTuple.getFieldStart(resultTuple.getFieldCount() - 1));
-
-            if (invListCursor.containsKey(resultTuple, invListCmp)) {
-                count++;
-                newBufIdx = appendTupleToNewResults(resultTuple, count, newBufIdx);
-            } else {
-                if (count + numQueryTokens - invListIx > occurrenceThreshold) {
-                    newBufIdx = appendTupleToNewResults(resultTuple, count, newBufIdx);
-                }
-            }
-
-            resultTidx++;
-            if (resultTidx >= resultFrameTupleAcc.getTupleCount()) {
-                prevBufIdx++;
-                if (prevBufIdx <= maxPrevBufIdx) {
-                    prevCurrentBuffer = prevResultBuffers.get(prevBufIdx);
-                    resultFrameTupleAcc.reset(prevCurrentBuffer);
-                    resultTidx = 0;
-                }
-            }
-        }
-
-        return newBufIdx;
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/TOccurrenceSearcherSuffixScanOnly.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/TOccurrenceSearcherSuffixScanOnly.java
deleted file mode 100644
index bd9bd60..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/impls/TOccurrenceSearcherSuffixScanOnly.java
+++ /dev/null
@@ -1,132 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.impls;
-
-import java.nio.ByteBuffer;
-import java.util.List;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedListCursor;
-
-public class TOccurrenceSearcherSuffixScanOnly extends TOccurrenceSearcher {
-
-	protected final MultiComparator invListCmp;
-	
-    public TOccurrenceSearcherSuffixScanOnly(IHyracksTaskContext ctx, InvertedIndex invIndex) {
-        super(ctx, invIndex);
-        this.invListCmp = MultiComparator.create(invIndex.getInvListElementCmpFactories());
-    }
-
-    protected int mergeSuffixLists(int numPrefixTokens, int numQueryTokens, int maxPrevBufIdx) throws HyracksDataException {
-        for (int i = numPrefixTokens; i < numQueryTokens; i++) {
-            swap = prevResultBuffers;
-            prevResultBuffers = newResultBuffers;
-            newResultBuffers = swap;
-            currentNumResults = 0;
-
-            invListCursors.get(i).pinPagesSync();
-            maxPrevBufIdx = mergeSuffixListScan(invListCursors.get(i), prevResultBuffers, maxPrevBufIdx,
-                    newResultBuffers, i, numQueryTokens);
-            invListCursors.get(i).unpinPages();
-        }
-        return maxPrevBufIdx;
-    }
-
-    protected int mergeSuffixListScan(IInvertedListCursor invListCursor, List<ByteBuffer> prevResultBuffers,
-            int maxPrevBufIdx, List<ByteBuffer> newResultBuffers, int invListIx, int numQueryTokens) {
-
-        int newBufIdx = 0;
-        ByteBuffer newCurrentBuffer = newResultBuffers.get(0);
-
-        int prevBufIdx = 0;
-        ByteBuffer prevCurrentBuffer = prevResultBuffers.get(0);
-
-        boolean advanceCursor = true;
-        boolean advancePrevResult = false;
-        int resultTidx = 0;
-
-        resultFrameTupleAcc.reset(prevCurrentBuffer);
-        resultFrameTupleApp.reset(newCurrentBuffer, true);
-
-        while (invListCursor.hasNext() && resultTidx < resultFrameTupleAcc.getTupleCount()) {
-
-            if (advanceCursor)
-                invListCursor.next();
-
-            ITupleReference invListTuple = invListCursor.getTuple();
-
-            resultTuple.reset(prevCurrentBuffer.array(), resultFrameTupleAcc.getTupleStartOffset(resultTidx));
-
-            int cmp = invListCmp.compare(invListTuple, resultTuple);
-            if (cmp == 0) {
-                int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
-                        resultTuple.getFieldStart(resultTuple.getFieldCount() - 1)) + 1;
-                newBufIdx = appendTupleToNewResults(resultTuple, count, newBufIdx);
-                advanceCursor = true;
-                advancePrevResult = true;
-            } else {
-                if (cmp < 0) {
-                    advanceCursor = true;
-                    advancePrevResult = false;
-                } else {
-                    int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
-                            resultTuple.getFieldStart(resultTuple.getFieldCount() - 1));
-                    if (count + numQueryTokens - invListIx > occurrenceThreshold) {
-                        newBufIdx = appendTupleToNewResults(resultTuple, count, newBufIdx);
-                    }
-                    advanceCursor = false;
-                    advancePrevResult = true;
-                }
-            }
-
-            if (advancePrevResult) {
-                resultTidx++;
-                if (resultTidx >= resultFrameTupleAcc.getTupleCount()) {
-                    prevBufIdx++;
-                    if (prevBufIdx <= maxPrevBufIdx) {
-                        prevCurrentBuffer = prevResultBuffers.get(prevBufIdx);
-                        resultFrameTupleAcc.reset(prevCurrentBuffer);
-                        resultTidx = 0;
-                    }
-                }
-            }
-        }
-
-        // append remaining elements from previous result set
-        while (resultTidx < resultFrameTupleAcc.getTupleCount()) {
-
-            int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
-                    resultTuple.getFieldStart(resultTuple.getFieldCount() - 1));
-            newBufIdx = appendTupleToNewResults(resultTuple, count, newBufIdx);
-
-            resultTidx++;
-            if (resultTidx >= resultFrameTupleAcc.getTupleCount()) {
-                prevBufIdx++;
-                if (prevBufIdx <= maxPrevBufIdx) {
-                    prevCurrentBuffer = prevResultBuffers.get(prevBufIdx);
-                    resultFrameTupleAcc.reset(prevCurrentBuffer);
-                    resultTidx = 0;
-                }
-            }
-        }
-
-        return newBufIdx;
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/ConjunctiveSearchModifier.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/ConjunctiveSearchModifier.java
deleted file mode 100644
index 55945be..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/ConjunctiveSearchModifier.java
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.searchmodifiers;
-
-import java.util.Collections;
-import java.util.List;
-
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedListCursor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifier;
-
-public class ConjunctiveSearchModifier implements IInvertedIndexSearchModifier {
-
-    @Override
-    public int getOccurrenceThreshold(List<IInvertedListCursor> invListCursors) {
-        return invListCursors.size();
-    }
-
-    @Override
-    public int getPrefixLists(List<IInvertedListCursor> invListCursors) {
-        Collections.sort(invListCursors);
-        return 1;
-    }
-
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/ConjunctiveSearchModifierFactory.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/ConjunctiveSearchModifierFactory.java
deleted file mode 100644
index 0db6008..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/ConjunctiveSearchModifierFactory.java
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.searchmodifiers;
-
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifier;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifierFactory;
-
-public class ConjunctiveSearchModifierFactory implements IInvertedIndexSearchModifierFactory {
-    private static final long serialVersionUID = 1L;
-
-    @Override
-    public IInvertedIndexSearchModifier createSearchModifier() {
-        return new ConjunctiveSearchModifier();
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/EditDistanceSearchModifier.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/EditDistanceSearchModifier.java
deleted file mode 100644
index ac109b6..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/EditDistanceSearchModifier.java
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.searchmodifiers;
-
-import java.util.Collections;
-import java.util.List;
-
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedListCursor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifier;
-
-public class EditDistanceSearchModifier implements IInvertedIndexSearchModifier {
-
-    private int gramLength;
-    private int edThresh;
-
-    public EditDistanceSearchModifier(int gramLength, int edThresh) {
-        this.gramLength = gramLength;
-        this.edThresh = edThresh;
-    }
-
-    @Override
-    public int getOccurrenceThreshold(List<IInvertedListCursor> invListCursors) {
-        return invListCursors.size() - edThresh * gramLength;
-    }
-
-    @Override
-    public int getPrefixLists(List<IInvertedListCursor> invListCursors) {
-        Collections.sort(invListCursors);
-        return invListCursors.size() - getOccurrenceThreshold(invListCursors) + 1;
-    }
-
-    public int getGramLength() {
-        return gramLength;
-    }
-
-    public void setGramLength(int gramLength) {
-        this.gramLength = gramLength;
-    }
-
-    public int getEdThresh() {
-        return edThresh;
-    }
-
-    public void setEdThresh(int edThresh) {
-        this.edThresh = edThresh;
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/EditDistanceSearchModifierFactory.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/EditDistanceSearchModifierFactory.java
deleted file mode 100644
index 128d9db..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/EditDistanceSearchModifierFactory.java
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.searchmodifiers;
-
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifier;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifierFactory;
-
-public class EditDistanceSearchModifierFactory implements IInvertedIndexSearchModifierFactory {
-
-    private static final long serialVersionUID = 1L;
-
-    private final int gramLength;
-    private final int edThresh;
-    
-    public EditDistanceSearchModifierFactory(int gramLength, int edThresh) {
-        this.gramLength = gramLength;
-        this.edThresh = edThresh;
-    }
-    
-    @Override
-    public IInvertedIndexSearchModifier createSearchModifier() {
-        return new EditDistanceSearchModifier(gramLength, edThresh);
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/JaccardSearchModifier.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/JaccardSearchModifier.java
deleted file mode 100644
index 0a4961d..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/JaccardSearchModifier.java
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.searchmodifiers;
-
-import java.util.Collections;
-import java.util.List;
-
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedListCursor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifier;
-
-public class JaccardSearchModifier implements IInvertedIndexSearchModifier {
-
-    private float jaccThresh;
-
-    public JaccardSearchModifier(float jaccThresh) {
-        this.jaccThresh = jaccThresh;
-    }
-
-    @Override
-    public int getOccurrenceThreshold(List<IInvertedListCursor> invListCursors) {
-        return Math.max((int) Math.floor((float) invListCursors.size() * jaccThresh), 1);
-    }
-
-    @Override
-    public int getPrefixLists(List<IInvertedListCursor> invListCursors) {
-        Collections.sort(invListCursors);
-        if (invListCursors.size() == 0) {
-            return 0;
-        }
-        return invListCursors.size() - getOccurrenceThreshold(invListCursors) + 1;
-    }
-
-    public float getJaccThresh() {
-        return jaccThresh;
-    }
-
-    public void setJaccThresh(float jaccThresh) {
-        this.jaccThresh = jaccThresh;
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/JaccardSearchModifierFactory.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/JaccardSearchModifierFactory.java
deleted file mode 100644
index bd27c03..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchmodifiers/JaccardSearchModifierFactory.java
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.searchmodifiers;
-
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifier;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifierFactory;
-
-public class JaccardSearchModifierFactory implements IInvertedIndexSearchModifierFactory {
-
-    private static final long serialVersionUID = 1L;
-
-    private final float jaccThresh;
-
-    public JaccardSearchModifierFactory(float jaccThresh) {
-        this.jaccThresh = jaccThresh;
-    }
-
-    @Override
-    public IInvertedIndexSearchModifier createSearchModifier() {
-        return new JaccardSearchModifier(jaccThresh);
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/AbstractUTF8StringBinaryTokenizer.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/AbstractUTF8StringBinaryTokenizer.java
deleted file mode 100644
index c2992f5..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/AbstractUTF8StringBinaryTokenizer.java
+++ /dev/null
@@ -1,77 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-
-public abstract class AbstractUTF8StringBinaryTokenizer implements IBinaryTokenizer {
-
-    protected byte[] data;
-    protected int start;
-    protected int length;
-    protected int tokenLength;
-    protected int index;
-    protected int utf8Length;
-
-    protected final IntArray tokensStart;
-    protected final IntArray tokensLength;
-    protected final IToken token;
-
-    protected final boolean ignoreTokenCount;
-    protected final boolean sourceHasTypeTag;
-
-    public AbstractUTF8StringBinaryTokenizer(boolean ignoreTokenCount, boolean sourceHasTypeTag,
-            ITokenFactory tokenFactory) {
-        this.ignoreTokenCount = ignoreTokenCount;
-        this.sourceHasTypeTag = sourceHasTypeTag;
-        if (!ignoreTokenCount) {
-            tokensStart = new IntArray();
-            tokensLength = new IntArray();
-        } else {
-            tokensStart = null;
-            tokensLength = null;
-        }
-        token = tokenFactory.createToken();
-    }
-
-    @Override
-    public IToken getToken() {
-        return token;
-    }
-
-    @Override
-    public void reset(byte[] data, int start, int length) {
-        this.start = start;
-        index = this.start;
-        if (sourceHasTypeTag) {
-            index++; // skip type tag
-        }
-        utf8Length = UTF8StringPointable.getUTFLength(data, index);
-        index += 2; // skip utf8 length indicator
-        this.data = data;
-        this.length = length + start;
-
-        tokenLength = 0;
-        if (!ignoreTokenCount) {
-            tokensStart.reset();
-            tokensLength.reset();
-        }
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/AbstractUTF8Token.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/AbstractUTF8Token.java
deleted file mode 100644
index 2f60952..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/AbstractUTF8Token.java
+++ /dev/null
@@ -1,105 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-import java.io.DataOutput;
-import java.io.IOException;
-
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.data.std.util.GrowableArray;
-
-public abstract class AbstractUTF8Token implements IToken {
-    public static final int GOLDEN_RATIO_32 = 0x09e3779b9;
-
-    protected int length;
-    protected int tokenLength;
-    protected int start;
-    protected int tokenCount;
-    protected byte[] data;
-    protected final byte tokenTypeTag;
-    protected final byte countTypeTag;
-
-    public AbstractUTF8Token() {
-        tokenTypeTag = -1;
-        countTypeTag = -1;
-    }
-
-    public AbstractUTF8Token(byte tokenTypeTag, byte countTypeTag) {
-        this.tokenTypeTag = tokenTypeTag;
-        this.countTypeTag = countTypeTag;
-    }
-
-    @Override
-    public byte[] getData() {
-        return data;
-    }
-
-    @Override
-    public int getLength() {
-        return length;
-    }
-
-    public int getLowerCaseUTF8Len(int size) {
-        int lowerCaseUTF8Len = 0;
-        int pos = start;
-        for (int i = 0; i < size; i++) {
-            char c = Character.toLowerCase(UTF8StringPointable.charAt(data, pos));
-            lowerCaseUTF8Len += UTF8StringPointable.getModifiedUTF8Len(c);
-            pos += UTF8StringPointable.charSize(data, pos);
-        }
-        return lowerCaseUTF8Len;
-    }
-
-    @Override
-    public int getStart() {
-        return start;
-    }
-
-    @Override
-    public int getTokenLength() {
-        return tokenLength;
-    }
-
-    public void handleCountTypeTag(DataOutput dos) throws IOException {
-        if (countTypeTag > 0) {
-            dos.write(countTypeTag);
-        }
-    }
-
-    public void handleTokenTypeTag(DataOutput dos) throws IOException {
-        if (tokenTypeTag > 0) {
-            dos.write(tokenTypeTag);
-        }
-    }
-
-    @Override
-    public void reset(byte[] data, int start, int length, int tokenLength, int tokenCount) {
-        this.data = data;
-        this.start = start;
-        this.length = length;
-        this.tokenLength = tokenLength;
-        this.tokenCount = tokenCount;
-    }
-
-    @Override
-    public void serializeTokenCount(GrowableArray out) throws IOException {
-        handleCountTypeTag(out.getDataOutput());
-        out.getDataOutput().writeInt(tokenCount);
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/AbstractUTF8TokenFactory.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/AbstractUTF8TokenFactory.java
deleted file mode 100644
index 3b0b82d..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/AbstractUTF8TokenFactory.java
+++ /dev/null
@@ -1,36 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-public abstract class AbstractUTF8TokenFactory implements ITokenFactory {
-	private static final long serialVersionUID = 1L;
-	protected final byte tokenTypeTag;
-	protected final byte countTypeTag;
-
-	public AbstractUTF8TokenFactory() {
-		tokenTypeTag = -1;
-		countTypeTag = -1;
-	}
-
-	public AbstractUTF8TokenFactory(byte tokenTypeTag, byte countTypeTag) {
-		this.tokenTypeTag = tokenTypeTag;
-		this.countTypeTag = countTypeTag;
-	}
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/DelimitedUTF8StringBinaryTokenizer.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/DelimitedUTF8StringBinaryTokenizer.java
deleted file mode 100644
index 9dacde6..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/DelimitedUTF8StringBinaryTokenizer.java
+++ /dev/null
@@ -1,81 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-
-public class DelimitedUTF8StringBinaryTokenizer extends AbstractUTF8StringBinaryTokenizer {
-
-    public DelimitedUTF8StringBinaryTokenizer(boolean ignoreTokenCount, boolean sourceHasTypeTag,
-            ITokenFactory tokenFactory) {
-        super(ignoreTokenCount, sourceHasTypeTag, tokenFactory);
-    }
-
-    @Override
-    public boolean hasNext() {
-        // skip delimiters
-        while (index < length && isSeparator(UTF8StringPointable.charAt(data, index))) {
-            index += UTF8StringPointable.charSize(data, index);
-        }
-        return index < length;
-    }
-
-    private boolean isSeparator(char c) {
-        return !(Character.isLetterOrDigit(c) || Character.getType(c) == Character.OTHER_LETTER || Character.getType(c) == Character.OTHER_NUMBER);
-    }
-
-    @Override
-    public void next() {
-        tokenLength = 0;
-        int currentTokenStart = index;
-        while (index < length && !isSeparator(UTF8StringPointable.charAt(data, index))) {
-            index += UTF8StringPointable.charSize(data, index);
-            tokenLength++;
-        }
-        int tokenCount = 1;
-        if (tokenLength > 0 && !ignoreTokenCount) {
-            // search if we got the same token before
-            for (int i = 0; i < tokensStart.length(); ++i) {
-                if (tokenLength == tokensLength.get(i)) {
-                    int tokenStart = tokensStart.get(i);
-                    tokenCount++; // assume we found it
-                    int offset = 0;
-                    int currLength = 0;
-                    while (currLength < tokenLength) {
-                        // case insensitive comparison
-                        if (Character.toLowerCase(UTF8StringPointable.charAt(data, currentTokenStart + offset)) != Character
-                                .toLowerCase(UTF8StringPointable.charAt(data, tokenStart + offset))) {
-                            tokenCount--;
-                            break;
-                        }
-                        offset += UTF8StringPointable.charSize(data, currentTokenStart + offset);
-                        currLength++;
-                    }
-                }
-            }
-            // add the new token to the list of seen tokens
-            tokensStart.add(currentTokenStart);
-            tokensLength.add(tokenLength);
-        }
-
-        // set token
-        token.reset(data, currentTokenStart, index, tokenLength, tokenCount);
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/DelimitedUTF8StringBinaryTokenizerFactory.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/DelimitedUTF8StringBinaryTokenizerFactory.java
deleted file mode 100644
index 4a350b3..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/DelimitedUTF8StringBinaryTokenizerFactory.java
+++ /dev/null
@@ -1,42 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-public class DelimitedUTF8StringBinaryTokenizerFactory implements
-		IBinaryTokenizerFactory {
-
-	private static final long serialVersionUID = 1L;
-	private final boolean ignoreTokenCount;
-	private final boolean sourceHasTypeTag;
-	private final ITokenFactory tokenFactory;
-
-	public DelimitedUTF8StringBinaryTokenizerFactory(boolean ignoreTokenCount,
-			boolean sourceHasTypeTag, ITokenFactory tokenFactory) {
-		this.ignoreTokenCount = ignoreTokenCount;
-		this.sourceHasTypeTag = sourceHasTypeTag;
-		this.tokenFactory = tokenFactory;
-	}
-
-	@Override
-	public IBinaryTokenizer createTokenizer() {
-		return new DelimitedUTF8StringBinaryTokenizer(ignoreTokenCount,
-				sourceHasTypeTag, tokenFactory);
-	}
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/HashedUTF8NGramToken.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/HashedUTF8NGramToken.java
deleted file mode 100644
index a1a4354..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/HashedUTF8NGramToken.java
+++ /dev/null
@@ -1,64 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-import java.io.IOException;
-
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.data.std.util.GrowableArray;
-
-public class HashedUTF8NGramToken extends UTF8NGramToken {
-    public HashedUTF8NGramToken(byte tokenTypeTag, byte countTypeTag) {
-        super(tokenTypeTag, countTypeTag);
-    }
-
-    @Override
-    public void serializeToken(GrowableArray out) throws IOException {
-        handleTokenTypeTag(out.getDataOutput());
-
-        int hash = GOLDEN_RATIO_32;
-
-        // pre chars
-        for (int i = 0; i < numPreChars; i++) {
-            hash ^= PRECHAR;
-            hash *= GOLDEN_RATIO_32;
-        }
-
-        // regular chars
-        int numRegGrams = tokenLength - numPreChars - numPostChars;
-        int pos = start;
-        for (int i = 0; i < numRegGrams; i++) {
-            hash ^= Character.toLowerCase(UTF8StringPointable.charAt(data, pos));
-            hash *= GOLDEN_RATIO_32;
-            pos += UTF8StringPointable.charSize(data, pos);
-        }
-
-        // post chars
-        for (int i = 0; i < numPostChars; i++) {
-            hash ^= POSTCHAR;
-            hash *= GOLDEN_RATIO_32;
-        }
-
-        // token count
-        hash += tokenCount;
-
-        out.getDataOutput().writeInt(hash);
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/HashedUTF8NGramTokenFactory.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/HashedUTF8NGramTokenFactory.java
deleted file mode 100644
index 4a87793..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/HashedUTF8NGramTokenFactory.java
+++ /dev/null
@@ -1,38 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-public class HashedUTF8NGramTokenFactory extends AbstractUTF8TokenFactory {
-
-	private static final long serialVersionUID = 1L;
-
-	public HashedUTF8NGramTokenFactory() {
-		super();
-	}
-
-	public HashedUTF8NGramTokenFactory(byte tokenTypeTag, byte countTypeTag) {
-		super(tokenTypeTag, countTypeTag);
-	}
-
-	@Override
-	public IToken createToken() {
-		return new HashedUTF8NGramToken(tokenTypeTag, countTypeTag);
-	}
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/HashedUTF8WordToken.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/HashedUTF8WordToken.java
deleted file mode 100644
index 20405c6..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/HashedUTF8WordToken.java
+++ /dev/null
@@ -1,87 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-import java.io.IOException;
-
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.data.std.util.GrowableArray;
-
-public class HashedUTF8WordToken extends UTF8WordToken {
-
-    private int hash = 0;
-
-    public HashedUTF8WordToken(byte tokenTypeTag, byte countTypeTag) {
-        super(tokenTypeTag, countTypeTag);
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        if (o == null) {
-            return false;
-        }
-        if (!(o instanceof IToken)) {
-            return false;
-        }
-        IToken t = (IToken) o;
-        if (t.getTokenLength() != tokenLength) {
-            return false;
-        }
-        int offset = 0;
-        for (int i = 0; i < tokenLength; i++) {
-            if (UTF8StringPointable.charAt(t.getData(), t.getStart() + offset) != UTF8StringPointable.charAt(data,
-                    start + offset)) {
-                return false;
-            }
-            offset += UTF8StringPointable.charSize(data, start + offset);
-        }
-        return true;
-    }
-
-    @Override
-    public int hashCode() {
-        return hash;
-    }
-
-    @Override
-    public void reset(byte[] data, int start, int length, int tokenLength, int tokenCount) {
-        super.reset(data, start, length, tokenLength, tokenCount);
-
-        // pre-compute hash value using JAQL-like string hashing
-        int pos = start;
-        hash = GOLDEN_RATIO_32;
-        for (int i = 0; i < tokenLength; i++) {
-            hash ^= Character.toLowerCase(UTF8StringPointable.charAt(data, pos));
-            hash *= GOLDEN_RATIO_32;
-            pos += UTF8StringPointable.charSize(data, pos);
-        }
-        hash += tokenCount;
-    }
-
-    @Override
-    public void serializeToken(GrowableArray out) throws IOException {
-        if (tokenTypeTag > 0) {
-            out.getDataOutput().write(tokenTypeTag);
-        }
-
-        // serialize hash value
-        out.getDataOutput().writeInt(hash);
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/HashedUTF8WordTokenFactory.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/HashedUTF8WordTokenFactory.java
deleted file mode 100644
index 318f041..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/HashedUTF8WordTokenFactory.java
+++ /dev/null
@@ -1,38 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-public class HashedUTF8WordTokenFactory extends AbstractUTF8TokenFactory {
-
-	private static final long serialVersionUID = 1L;
-
-	public HashedUTF8WordTokenFactory() {
-		super();
-	}
-
-	public HashedUTF8WordTokenFactory(byte tokenTypeTag, byte countTypeTag) {
-		super(tokenTypeTag, countTypeTag);
-	}
-
-	@Override
-	public IToken createToken() {
-		return new HashedUTF8WordToken(tokenTypeTag, countTypeTag);
-	}
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/IBinaryTokenizer.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/IBinaryTokenizer.java
deleted file mode 100644
index 05c6d0b..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/IBinaryTokenizer.java
+++ /dev/null
@@ -1,30 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-public interface IBinaryTokenizer {
-	public IToken getToken();
-
-	public boolean hasNext();
-
-	public void next();
-
-	public void reset(byte[] data, int start, int length);
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/IBinaryTokenizerFactory.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/IBinaryTokenizerFactory.java
deleted file mode 100644
index bfe78ee..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/IBinaryTokenizerFactory.java
+++ /dev/null
@@ -1,26 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-import java.io.Serializable;
-
-public interface IBinaryTokenizerFactory extends Serializable {
-	public IBinaryTokenizer createTokenizer();
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/INGramToken.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/INGramToken.java
deleted file mode 100644
index befc6d2..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/INGramToken.java
+++ /dev/null
@@ -1,28 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-public interface INGramToken {
-	public int getNumPostChars();
-
-	public int getNumPreChars();
-
-	public void setNumPrePostChars(int numPreChars, int numPostChars);
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/IToken.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/IToken.java
deleted file mode 100644
index 47467a1..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/IToken.java
+++ /dev/null
@@ -1,41 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-import java.io.IOException;
-
-import edu.uci.ics.hyracks.data.std.util.GrowableArray;
-
-public interface IToken {
-	public byte[] getData();
-
-	public int getLength();
-
-	public int getStart();
-
-	public int getTokenLength();
-
-	public void reset(byte[] data, int start, int length, int tokenLength,
-			int tokenCount);
-
-	public void serializeToken(GrowableArray out) throws IOException;
-
-	public void serializeTokenCount(GrowableArray out) throws IOException;
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/ITokenFactory.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/ITokenFactory.java
deleted file mode 100644
index 8b5d71d..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/ITokenFactory.java
+++ /dev/null
@@ -1,26 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-import java.io.Serializable;
-
-public interface ITokenFactory extends Serializable {
-    public IToken createToken();
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/IntArray.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/IntArray.java
deleted file mode 100644
index 2eb9ff4..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/IntArray.java
+++ /dev/null
@@ -1,80 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Rares Vernica <rares (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-import java.util.Arrays;
-
-public class IntArray {
-    private static final int SIZE = 128;
-
-    private int[] data;
-    private int length;
-
-    public IntArray() {
-        data = new int[SIZE];
-        length = 0;
-    }
-
-    public void add(int d) {
-        if (length == data.length) {
-            data = Arrays.copyOf(data, data.length << 1);
-        }
-        data[length++] = d;
-    }
-
-    public int[] get() {
-        return data;
-    }
-
-    public int get(int i) {
-        return data[i];
-    }
-
-    public int length() {
-        return length;
-    }
-
-    public void reset() {
-        length = 0;
-    }
-
-    public void sort() {
-        sort(0, length);
-    }
-
-    public void sort(int start, int end) {
-        Arrays.sort(data, start, end);
-    }
-
-    @Override
-    public String toString() {
-        StringBuilder out = new StringBuilder();
-        out.append('[');
-        for (int i = 0; i < length; ++i) {
-            out.append(data[i]);
-            if (i < length - 1) {
-                out.append(',');
-                out.append(' ');
-            }
-        }
-        out.append(']');
-        return out.toString();
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/NGramUTF8StringBinaryTokenizer.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/NGramUTF8StringBinaryTokenizer.java
deleted file mode 100644
index fdfc02f..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/NGramUTF8StringBinaryTokenizer.java
+++ /dev/null
@@ -1,118 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-
-public class NGramUTF8StringBinaryTokenizer extends AbstractUTF8StringBinaryTokenizer {
-
-    private int gramLength;
-    private boolean usePrePost;
-
-    private int gramNum;
-    private int totalGrams;
-
-    private final INGramToken concreteToken;
-
-    public NGramUTF8StringBinaryTokenizer(int gramLength, boolean usePrePost, boolean ignoreTokenCount,
-            boolean sourceHasTypeTag, ITokenFactory tokenFactory) {
-        super(ignoreTokenCount, sourceHasTypeTag, tokenFactory);
-        this.gramLength = gramLength;
-        this.usePrePost = usePrePost;
-        concreteToken = (INGramToken) token;
-    }
-
-    @Override
-    public boolean hasNext() {
-        if (gramNum < totalGrams) {
-            return true;
-        } else {
-            return false;
-        }
-    }
-
-    @Override
-    public void next() {
-        int currentTokenStart = index;
-        int tokenCount = 1;
-        int numPreChars = 0;
-        int numPostChars = 0;
-        if (usePrePost) {
-            numPreChars = Math.max(gramLength - gramNum - 1, 0);
-            numPostChars = (gramNum > totalGrams - gramLength) ? gramLength - totalGrams + gramNum : 0;
-        }
-        gramNum++;
-
-        concreteToken.setNumPrePostChars(numPreChars, numPostChars);
-        if (numPreChars == 0) {
-            index += UTF8StringPointable.charSize(data, index);
-        }
-
-        // compute token count
-        // ignore pre and post grams for duplicate detection
-        if (!ignoreTokenCount && numPreChars == 0 && numPostChars == 0) {
-            int tmpIndex = start;
-            while (tmpIndex < currentTokenStart) {
-                tokenCount++; // assume found
-                int offset = 0;
-                for (int j = 0; j < gramLength; j++) {
-                    if (Character.toLowerCase(UTF8StringPointable.charAt(data, currentTokenStart + offset)) != Character
-                            .toLowerCase(UTF8StringPointable.charAt(data, tmpIndex + offset))) {
-                        tokenCount--;
-                        break;
-                    }
-                    offset += UTF8StringPointable.charSize(data, tmpIndex + offset);
-                }
-                tmpIndex += UTF8StringPointable.charSize(data, tmpIndex);
-            }
-        }
-
-        // set token
-        token.reset(data, currentTokenStart, length, gramLength, tokenCount);
-    }
-
-    @Override
-    public void reset(byte[] data, int start, int length) {
-        super.reset(data, start, length);
-        gramNum = 0;
-
-        int numChars = 0;
-        int pos = index;
-        int end = pos + utf8Length;
-        while (pos < end) {
-            numChars++;
-            pos += UTF8StringPointable.charSize(data, pos);
-        }
-
-        if (usePrePost) {
-            totalGrams = numChars + gramLength - 1;
-        } else {
-            totalGrams = numChars - gramLength + 1;
-        }
-    }
-
-    public void setGramlength(int gramLength) {
-        this.gramLength = gramLength;
-    }
-
-    public void setPrePost(boolean usePrePost) {
-        this.usePrePost = usePrePost;
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/UTF8NGramToken.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/UTF8NGramToken.java
deleted file mode 100644
index 8cb9818..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/UTF8NGramToken.java
+++ /dev/null
@@ -1,91 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-import java.io.IOException;
-
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.data.std.util.GrowableArray;
-import edu.uci.ics.hyracks.dataflow.common.data.util.StringUtils;
-
-public class UTF8NGramToken extends AbstractUTF8Token implements INGramToken {
-
-    public final static char PRECHAR = '#';
-
-    public final static char POSTCHAR = '$';
-
-    protected int numPreChars;
-    protected int numPostChars;
-
-    public UTF8NGramToken(byte tokenTypeTag, byte countTypeTag) {
-        super(tokenTypeTag, countTypeTag);
-    }
-
-    @Override
-    public int getNumPostChars() {
-        return numPreChars;
-    }
-
-    @Override
-    public int getNumPreChars() {
-        return numPostChars;
-    }
-
-    @Override
-    public void serializeToken(GrowableArray out) throws IOException {
-        handleTokenTypeTag(out.getDataOutput());
-        int tokenUTF8LenOff = out.getLength();
-
-        // regular chars
-        int numRegChars = tokenLength - numPreChars - numPostChars;
-
-        // assuming pre and post char need 1-byte each in utf8
-        int tokenUTF8Len = numPreChars + numPostChars;
-
-        // Write dummy UTF length which will be correctly set later.
-        out.getDataOutput().writeShort(0);
-
-        // pre chars
-        for (int i = 0; i < numPreChars; i++) {
-            StringUtils.writeCharAsModifiedUTF8(PRECHAR, out.getDataOutput());
-        }
-
-        int pos = start;
-        for (int i = 0; i < numRegChars; i++) {
-            char c = Character.toLowerCase(UTF8StringPointable.charAt(data, pos));
-            tokenUTF8Len += StringUtils.writeCharAsModifiedUTF8(c, out.getDataOutput());
-            pos += UTF8StringPointable.charSize(data, pos);
-        }
-
-        // post chars
-        for (int i = 0; i < numPostChars; i++) {
-            StringUtils.writeCharAsModifiedUTF8(POSTCHAR, out.getDataOutput());
-        }
-
-        // Set UTF length of token.
-        out.getByteArray()[tokenUTF8LenOff] = (byte) ((tokenUTF8Len >>> 8) & 0xFF);
-        out.getByteArray()[tokenUTF8LenOff + 1] = (byte) ((tokenUTF8Len >>> 0) & 0xFF);
-    }
-
-    public void setNumPrePostChars(int numPreChars, int numPostChars) {
-        this.numPreChars = numPreChars;
-        this.numPostChars = numPostChars;
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/UTF8NGramTokenFactory.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/UTF8NGramTokenFactory.java
deleted file mode 100644
index 968d8e1..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/UTF8NGramTokenFactory.java
+++ /dev/null
@@ -1,39 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-public class UTF8NGramTokenFactory extends AbstractUTF8TokenFactory {
-
-	private static final long serialVersionUID = 1L;
-
-	public UTF8NGramTokenFactory() {
-		super();
-	}
-
-	public UTF8NGramTokenFactory(byte tokenTypeTag, byte countTypeTag) {
-		super(tokenTypeTag, countTypeTag);
-	}
-
-	@Override
-	public IToken createToken() {
-		return new UTF8NGramToken(tokenTypeTag, countTypeTag);
-	}
-
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/UTF8WordToken.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/UTF8WordToken.java
deleted file mode 100644
index 9d7fe7c..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/UTF8WordToken.java
+++ /dev/null
@@ -1,51 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-import java.io.IOException;
-
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.data.std.util.GrowableArray;
-import edu.uci.ics.hyracks.dataflow.common.data.util.StringUtils;
-
-public class UTF8WordToken extends AbstractUTF8Token {
-
-    public UTF8WordToken(byte tokenTypeTag, byte countTypeTag) {
-        super(tokenTypeTag, countTypeTag);
-    }
-
-    @Override
-    public void serializeToken(GrowableArray out) throws IOException {
-        handleTokenTypeTag(out.getDataOutput());
-        int tokenUTF8LenOff = out.getLength();
-        int tokenUTF8Len = 0;
-        // Write dummy UTF length which will be correctly set later.
-        out.getDataOutput().writeShort(0);
-        int pos = start;
-        for (int i = 0; i < tokenLength; i++) {
-            char c = Character.toLowerCase(UTF8StringPointable.charAt(data, pos));
-            tokenUTF8Len += StringUtils.writeCharAsModifiedUTF8(c, out.getDataOutput());
-            pos += UTF8StringPointable.charSize(data, pos);
-        }
-        // Set UTF length of token.
-        out.getByteArray()[tokenUTF8LenOff] = (byte) ((tokenUTF8Len >>> 8) & 0xFF);
-        out.getByteArray()[tokenUTF8LenOff + 1] = (byte) ((tokenUTF8Len >>> 0) & 0xFF);
-    }
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/UTF8WordTokenFactory.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/UTF8WordTokenFactory.java
deleted file mode 100644
index 4358254..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/tokenizers/UTF8WordTokenFactory.java
+++ /dev/null
@@ -1,39 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers;
-
-public class UTF8WordTokenFactory extends AbstractUTF8TokenFactory {
-
-	private static final long serialVersionUID = 1L;
-
-	public UTF8WordTokenFactory() {
-		super();
-	}
-
-	public UTF8WordTokenFactory(byte tokenTypeTag, byte countTypeTag) {
-		super(tokenTypeTag, countTypeTag);
-	}
-
-	@Override
-	public IToken createToken() {
-		return new UTF8WordToken(tokenTypeTag, countTypeTag);
-	}
-
-}
diff --git a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/util/InvertedIndexUtils.java b/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/util/InvertedIndexUtils.java
deleted file mode 100644
index a1d1f06..0000000
--- a/hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/util/InvertedIndexUtils.java
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex.util;
-
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
-
-public class InvertedIndexUtils {
-    // Type traits to be appended to the token type trait which finally form the BTree field type traits.
-    private static final ITypeTraits[] btreeValueTypeTraits = new ITypeTraits[4];
-    static {
-        // startPageId
-        btreeValueTypeTraits[0] = IntegerPointable.TYPE_TRAITS;
-        // endPageId
-        btreeValueTypeTraits[1] = IntegerPointable.TYPE_TRAITS;
-        // startOff
-        btreeValueTypeTraits[2] = IntegerPointable.TYPE_TRAITS;
-        // numElements
-        btreeValueTypeTraits[3] = IntegerPointable.TYPE_TRAITS;
-    }
-
-    public static ITypeTraits[] getBTreeTypeTraits(ITypeTraits[] tokenTypeTraits) {
-        ITypeTraits[] btreeTypeTraits = new ITypeTraits[tokenTypeTraits.length + btreeValueTypeTraits.length];
-        // Set key type traits.
-        for (int i = 0; i < tokenTypeTraits.length; i++) {
-            btreeTypeTraits[i] = tokenTypeTraits[i];
-        }
-        // Set value type traits.
-        for (int i = 0; i < btreeValueTypeTraits.length; i++) {
-            btreeTypeTraits[i + tokenTypeTraits.length] = btreeValueTypeTraits[i];
-        }
-        return btreeTypeTraits;
-    }
-}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/pom.xml b/hyracks/hyracks-storage-am-lsm-btree/pom.xml
new file mode 100644
index 0000000..6c4ffd3
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/pom.xml
@@ -0,0 +1,47 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <artifactId>hyracks-storage-am-lsm-btree</artifactId>
+
+  <parent>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks</artifactId>
+    <version>0.2.5-SNAPSHOT</version>
+  </parent>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.0.2</version>
+        <configuration>
+          <source>1.7</source>
+          <target>1.7</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>    
+    <dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-btree</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency> 
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-bloomfilter</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency> 
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-lsm-common</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>  	
+  </dependencies>
+</project>
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/dataflow/LSMBTreeDataflowHelper.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/dataflow/LSMBTreeDataflowHelper.java
new file mode 100644
index 0000000..06f06c6
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/dataflow/LSMBTreeDataflowHelper.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeUtils;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.dataflow.AbstractLSMIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.InMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.InMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.common.buffercache.HeapBufferAllocator;
+import edu.uci.ics.hyracks.storage.common.file.TransientFileMapManager;
+
+public class LSMBTreeDataflowHelper extends AbstractLSMIndexDataflowHelper {
+
+    public LSMBTreeDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
+        this(opDesc, ctx, partition, DEFAULT_MEM_PAGE_SIZE, DEFAULT_MEM_NUM_PAGES, mergePolicy, opTrackerFactory,
+                ioScheduler, ioOpCallbackProvider);
+    }
+
+    public LSMBTreeDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition,
+            int memPageSize, int memNumPages, ILSMMergePolicy mergePolicy,
+            ILSMOperationTrackerFactory opTrackerFactory, ILSMIOOperationScheduler ioScheduler,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
+        super(opDesc, ctx, partition, memPageSize, memNumPages, mergePolicy, opTrackerFactory, ioScheduler,
+                ioOpCallbackProvider);
+    }
+
+    @Override
+    public ITreeIndex createIndexInstance() throws HyracksDataException {
+        AbstractTreeIndexOperatorDescriptor treeOpDesc = (AbstractTreeIndexOperatorDescriptor) opDesc;
+        ITreeIndexMetaDataFrameFactory metaDataFrameFactory = new LIFOMetaDataFrameFactory();
+        IInMemoryBufferCache memBufferCache = new InMemoryBufferCache(new HeapBufferAllocator(), memPageSize,
+                memNumPages, new TransientFileMapManager());
+        IInMemoryFreePageManager memFreePageManager = new InMemoryFreePageManager(memNumPages, metaDataFrameFactory);
+        return LSMBTreeUtils.createLSMTree(memBufferCache, memFreePageManager, ctx.getIOManager(), file, opDesc
+                .getStorageManager().getBufferCache(ctx), opDesc.getStorageManager().getFileMapProvider(ctx),
+                treeOpDesc.getTreeIndexTypeTraits(), treeOpDesc.getTreeIndexComparatorFactories(), treeOpDesc
+                        .getTreeIndexBloomFilterKeyFields(), mergePolicy, opTrackerFactory, ioScheduler,
+                ioOpCallbackProvider, partition);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/dataflow/LSMBTreeDataflowHelperFactory.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/dataflow/LSMBTreeDataflowHelperFactory.java
new file mode 100644
index 0000000..ebf4bc0
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/dataflow/LSMBTreeDataflowHelperFactory.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationSchedulerProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicyProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.dataflow.AbstractLSMIndexDataflowHelperFactory;
+
+public class LSMBTreeDataflowHelperFactory extends AbstractLSMIndexDataflowHelperFactory {
+
+    private static final long serialVersionUID = 1L;
+
+    public LSMBTreeDataflowHelperFactory(ILSMMergePolicyProvider mergePolicyProvider,
+            ILSMOperationTrackerFactory opTrackerFactory, ILSMIOOperationSchedulerProvider ioSchedulerProvider,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider, int memPageSize, int memNumPages) {
+        super(mergePolicyProvider, opTrackerFactory, ioSchedulerProvider, ioOpCallbackProvider, memPageSize,
+                memNumPages);
+    }
+
+    @Override
+    public IndexDataflowHelper createIndexDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
+            int partition) {
+        return new LSMBTreeDataflowHelper(opDesc, ctx, partition, memPageSize, memNumPages,
+                mergePolicyProvider.getMergePolicy(ctx), opTrackerFactory, ioSchedulerProvider.getIOScheduler(ctx),
+                ioOpCallbackProvider);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/AntimatterAwareTupleAcceptor.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/AntimatterAwareTupleAcceptor.java
new file mode 100644
index 0000000..e88aea6
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/AntimatterAwareTupleAcceptor.java
@@ -0,0 +1,18 @@
+package edu.uci.ics.hyracks.storage.am.lsm.btree.impls;
+
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.api.ITupleAcceptor;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.tuples.LSMBTreeTupleReference;
+
+public enum AntimatterAwareTupleAcceptor implements ITupleAcceptor {
+    INSTANCE;
+
+    @Override
+    public boolean accept(ITupleReference tuple) {
+        if (tuple == null) {
+            return true;
+        }
+        return ((LSMBTreeTupleReference) tuple).isAntimatter();
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTree.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTree.java
new file mode 100644
index 0000000..2847004
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTree.java
@@ -0,0 +1,650 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.impls;
+
+import java.io.File;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomCalculations;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilter;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilterFactory;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilterSpecification;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeDuplicateKeyException;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree.BTreeAccessor;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree.BTreeBulkLoader;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeRangeSearchCursor;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.tuples.LSMBTreeTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessorInternal;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.InMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractLSMIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BlockingIOOperationCallbackWrapper;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMTreeIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class LSMBTree extends AbstractLSMIndex implements ITreeIndex {
+
+    // In-memory components.
+    private final LSMBTreeMutableComponent mutableComponent;
+
+    // For creating BTree's used in flush and merge.
+    private final LSMBTreeImmutableComponentFactory componentFactory;
+    // For creating BTree's used in bulk load. Different from diskBTreeFactory
+    // because it should have a different tuple writer in it's leaf frames.
+    private final LSMBTreeImmutableComponentFactory bulkLoadComponentFactory;
+
+    // Common for in-memory and on-disk components.
+    private final ITreeIndexFrameFactory insertLeafFrameFactory;
+    private final ITreeIndexFrameFactory deleteLeafFrameFactory;
+    private final IBinaryComparatorFactory[] cmpFactories;
+
+    public LSMBTree(IInMemoryBufferCache memBufferCache, IInMemoryFreePageManager memFreePageManager,
+            ITreeIndexFrameFactory interiorFrameFactory, ITreeIndexFrameFactory insertLeafFrameFactory,
+            ITreeIndexFrameFactory deleteLeafFrameFactory, ILSMIndexFileManager fileManager,
+            TreeIndexFactory<BTree> diskBTreeFactory, TreeIndexFactory<BTree> bulkLoadBTreeFactory,
+            BloomFilterFactory bloomFilterFactory, IFileMapProvider diskFileMapProvider, int fieldCount,
+            IBinaryComparatorFactory[] cmpFactories, ILSMMergePolicy mergePolicy,
+            ILSMOperationTrackerFactory opTrackerFactory, ILSMIOOperationScheduler ioScheduler,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
+        super(memFreePageManager, diskBTreeFactory.getBufferCache(), fileManager, diskFileMapProvider, mergePolicy,
+                opTrackerFactory, ioScheduler, ioOpCallbackProvider);
+        mutableComponent = new LSMBTreeMutableComponent(new BTree(memBufferCache,
+                ((InMemoryBufferCache) memBufferCache).getFileMapProvider(), memFreePageManager, interiorFrameFactory,
+                insertLeafFrameFactory, cmpFactories, fieldCount, new FileReference(new File("membtree"))),
+                memFreePageManager);
+        this.insertLeafFrameFactory = insertLeafFrameFactory;
+        this.deleteLeafFrameFactory = deleteLeafFrameFactory;
+        this.cmpFactories = cmpFactories;
+        componentFactory = new LSMBTreeImmutableComponentFactory(diskBTreeFactory, bloomFilterFactory);
+        bulkLoadComponentFactory = new LSMBTreeImmutableComponentFactory(bulkLoadBTreeFactory, bloomFilterFactory);
+    }
+
+    @Override
+    public synchronized void create() throws HyracksDataException {
+        if (isActivated) {
+            throw new HyracksDataException("Failed to create the index since it is activated.");
+        }
+
+        fileManager.deleteDirs();
+        fileManager.createDirs();
+        componentsRef.get().clear();
+    }
+
+    @Override
+    public synchronized void activate() throws HyracksDataException {
+        if (isActivated) {
+            return;
+        }
+
+        ((InMemoryBufferCache) mutableComponent.getBTree().getBufferCache()).open();
+        mutableComponent.getBTree().create();
+        mutableComponent.getBTree().activate();
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        immutableComponents.clear();
+        List<LSMComponentFileReferences> validFileReferences;
+        try {
+            validFileReferences = fileManager.cleanupAndGetValidFiles();
+        } catch (IndexException e) {
+            throw new HyracksDataException(e);
+        }
+        for (LSMComponentFileReferences lsmComonentFileReference : validFileReferences) {
+            LSMBTreeImmutableComponent component;
+            try {
+                component = createDiskComponent(componentFactory,
+                        lsmComonentFileReference.getInsertIndexFileReference(),
+                        lsmComonentFileReference.getBloomFilterFileReference(), false);
+            } catch (IndexException e) {
+                throw new HyracksDataException(e);
+            }
+            immutableComponents.add(component);
+        }
+        isActivated = true;
+    }
+
+    @Override
+    public synchronized void deactivate(boolean flushOnExit) throws HyracksDataException {
+        if (!isActivated) {
+            return;
+        }
+
+        if (flushOnExit) {
+            BlockingIOOperationCallbackWrapper cb = new BlockingIOOperationCallbackWrapper(
+                    ioOpCallbackProvider.getIOOperationCallback(this));
+            ILSMIndexAccessor accessor = createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            accessor.scheduleFlush(cb);
+            try {
+                cb.waitForIO();
+            } catch (InterruptedException e) {
+                throw new HyracksDataException(e);
+            }
+        }
+
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        for (ILSMComponent c : immutableComponents) {
+            LSMBTreeImmutableComponent component = (LSMBTreeImmutableComponent) c;
+            BTree btree = component.getBTree();
+            BloomFilter bloomFilter = component.getBloomFilter();
+            btree.deactivate();
+            bloomFilter.deactivate();
+        }
+        mutableComponent.getBTree().deactivate();
+        mutableComponent.getBTree().destroy();
+        ((InMemoryBufferCache) mutableComponent.getBTree().getBufferCache()).close();
+        isActivated = false;
+    }
+
+    @Override
+    public synchronized void deactivate() throws HyracksDataException {
+        deactivate(true);
+    }
+
+    @Override
+    public void destroy() throws HyracksDataException {
+        if (isActivated) {
+            throw new HyracksDataException("Failed to destroy the index since it is activated.");
+        }
+
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        for (ILSMComponent c : immutableComponents) {
+            LSMBTreeImmutableComponent component = (LSMBTreeImmutableComponent) c;
+            component.getBTree().destroy();
+            component.getBloomFilter().destroy();
+        }
+        mutableComponent.getBTree().destroy();
+        fileManager.deleteDirs();
+    }
+
+    @Override
+    public void clear() throws HyracksDataException {
+        if (!isActivated) {
+            throw new HyracksDataException("Failed to clear the index since it is not activated.");
+        }
+
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        mutableComponent.getBTree().clear();
+        for (ILSMComponent c : immutableComponents) {
+            LSMBTreeImmutableComponent component = (LSMBTreeImmutableComponent) c;
+            component.getBloomFilter().deactivate();
+            component.getBTree().deactivate();
+            component.getBloomFilter().destroy();
+            component.getBTree().destroy();
+        }
+        immutableComponents.clear();
+    }
+
+    @Override
+    public void getOperationalComponents(ILSMIndexOperationContext ctx) {
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        List<ILSMComponent> operationalComponents = ctx.getComponentHolder();
+        operationalComponents.clear();
+        switch (ctx.getOperation()) {
+            case UPDATE:
+            case UPSERT:
+            case PHYSICALDELETE:
+            case FLUSH:
+            case DELETE:
+                operationalComponents.add(mutableComponent);
+                break;
+            case SEARCH:
+            case INSERT:
+                operationalComponents.add(mutableComponent);
+                operationalComponents.addAll(immutableComponents);
+                break;
+            case MERGE:
+                operationalComponents.addAll(immutableComponents);
+                break;
+            default:
+                throw new UnsupportedOperationException("Operation " + ctx.getOperation() + " not supported.");
+        }
+    }
+
+    @Override
+    public void modify(IIndexOperationContext ictx, ITupleReference tuple) throws HyracksDataException, IndexException {
+        LSMBTreeOpContext ctx = (LSMBTreeOpContext) ictx;
+        switch (ctx.getOperation()) {
+            case PHYSICALDELETE:
+                ctx.memBTreeAccessor.delete(tuple);
+                break;
+            case INSERT:
+                insert(tuple, ctx);
+                break;
+            default:
+                ctx.memBTreeAccessor.upsert(tuple);
+                break;
+        }
+        mutableComponent.setIsModified();
+    }
+
+    private boolean insert(ITupleReference tuple, LSMBTreeOpContext ctx) throws HyracksDataException, IndexException {
+        MultiComparator comparator = MultiComparator.createIgnoreFieldLength(mutableComponent.getBTree()
+                .getComparatorFactories());
+        LSMBTreePointSearchCursor searchCursor = new LSMBTreePointSearchCursor(ctx);
+        IIndexCursor memCursor = new BTreeRangeSearchCursor(ctx.memBTreeOpCtx.leafFrame, false);
+        RangePredicate predicate = new RangePredicate(tuple, tuple, true, true, comparator, comparator);
+
+        // first check the inmemory component
+        ctx.memBTreeAccessor.search(memCursor, predicate);
+        try {
+            if (memCursor.hasNext()) {
+                memCursor.next();
+                LSMBTreeTupleReference lsmbtreeTuple = (LSMBTreeTupleReference) memCursor.getTuple();
+                if (!lsmbtreeTuple.isAntimatter()) {
+                    throw new BTreeDuplicateKeyException("Failed to insert key since key already exists.");
+                } else {
+                    memCursor.close();
+                    ctx.memBTreeAccessor.upsertIfConditionElseInsert(tuple, AntimatterAwareTupleAcceptor.INSTANCE);
+                    return true;
+                }
+            }
+        } finally {
+            memCursor.close();
+        }
+
+        // TODO: Can we just remove the above code that search the mutable
+        // component and do it together with the search call below? i.e. instead
+        // of passing false to the lsmHarness.search(), we pass true to include
+        // the mutable component?
+        // the key was not in the inmemory component, so check the disk
+        // components
+        search(ctx, searchCursor, predicate);
+        try {
+            if (searchCursor.hasNext()) {
+                throw new BTreeDuplicateKeyException("Failed to insert key since key already exists.");
+            }
+        } finally {
+            searchCursor.close();
+        }
+        ctx.memBTreeAccessor.upsertIfConditionElseInsert(tuple, AntimatterAwareTupleAcceptor.INSTANCE);
+
+        return true;
+    }
+
+    @Override
+    public void search(ILSMIndexOperationContext ictx, IIndexCursor cursor, ISearchPredicate pred)
+            throws HyracksDataException, IndexException {
+        LSMBTreeOpContext ctx = (LSMBTreeOpContext) ictx;
+        List<ILSMComponent> operationalComponents = ctx.getComponentHolder();
+        int numBTrees = operationalComponents.size();
+        assert numBTrees > 0;
+
+        boolean includeMutableComponent = operationalComponents.get(0) == mutableComponent;
+        LSMBTreeCursorInitialState initialState = new LSMBTreeCursorInitialState(numBTrees, insertLeafFrameFactory,
+                ctx.cmp, ctx.bloomFilterCmp, includeMutableComponent, lsmHarness, ctx.memBTreeAccessor, pred,
+                ctx.searchCallback, operationalComponents);
+        cursor.open(initialState, pred);
+    }
+
+    @Override
+    public boolean scheduleFlush(ILSMIndexOperationContext ctx, ILSMIOOperationCallback callback)
+            throws HyracksDataException {
+        if (!mutableComponent.isModified()) {
+            return false;
+        }
+        LSMComponentFileReferences componentFileRefs = fileManager.getRelFlushFileReference();
+        LSMBTreeOpContext opCtx = createOpContext(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        assert ctx.getComponentHolder().size() == 1;
+        ILSMComponent flushingComponent = ctx.getComponentHolder().get(0);
+        opCtx.setOperation(IndexOperation.FLUSH);
+        opCtx.getComponentHolder().add(flushingComponent);
+        ILSMIndexAccessorInternal flushAccessor = new LSMBTreeAccessor(lsmHarness, opCtx);
+        ioScheduler.scheduleOperation(new LSMBTreeFlushOperation(flushAccessor, flushingComponent, componentFileRefs
+                .getInsertIndexFileReference(), componentFileRefs.getBloomFilterFileReference(), callback));
+        return true;
+    }
+
+    @Override
+    public ILSMComponent flush(ILSMIOOperation operation) throws HyracksDataException, IndexException {
+        LSMBTreeFlushOperation flushOp = (LSMBTreeFlushOperation) operation;
+        LSMBTreeMutableComponent flushingComponent = (LSMBTreeMutableComponent) flushOp.getFlushingComponent();
+        IIndexAccessor accessor = flushingComponent.getBTree().createAccessor(NoOpOperationCallback.INSTANCE,
+                NoOpOperationCallback.INSTANCE);
+
+        RangePredicate nullPred = new RangePredicate(null, null, true, true, null, null);
+        IIndexCursor countingCursor = ((BTreeAccessor) accessor).createCountingSearchCursor();
+        accessor.search(countingCursor, nullPred);
+        long numElements = 0L;
+        try {
+            while (countingCursor.hasNext()) {
+                countingCursor.next();
+                ITupleReference countTuple = countingCursor.getTuple();
+                numElements = IntegerSerializerDeserializer.getInt(countTuple.getFieldData(0),
+                        countTuple.getFieldStart(0));
+            }
+        } finally {
+            countingCursor.close();
+        }
+
+        int maxBucketsPerElement = BloomCalculations.maxBucketsPerElement(numElements);
+        BloomFilterSpecification bloomFilterSpec = BloomCalculations.computeBloomSpec(maxBucketsPerElement,
+                MAX_BLOOM_FILTER_ACCEPTABLE_FALSE_POSITIVE_RATE);
+
+        LSMBTreeImmutableComponent component = createDiskComponent(componentFactory, flushOp.getBTreeFlushTarget(),
+                flushOp.getBloomFilterFlushTarget(), true);
+        IIndexBulkLoader bulkLoader = component.getBTree().createBulkLoader(1.0f, false, numElements);
+        IIndexBulkLoader builder = component.getBloomFilter().createBuilder(numElements,
+                bloomFilterSpec.getNumHashes(), bloomFilterSpec.getNumBucketsPerElements());
+
+        IIndexCursor scanCursor = accessor.createSearchCursor();
+        accessor.search(scanCursor, nullPred);
+        try {
+            while (scanCursor.hasNext()) {
+                scanCursor.next();
+                builder.add(scanCursor.getTuple());
+                bulkLoader.add(scanCursor.getTuple());
+            }
+        } finally {
+            scanCursor.close();
+            builder.end();
+        }
+        bulkLoader.end();
+        return component;
+    }
+
+    public void scheduleMerge(ILSMIndexOperationContext ctx, ILSMIOOperationCallback callback)
+            throws HyracksDataException, IndexException {
+        LSMBTreeOpContext opCtx = createOpContext(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        List<ILSMComponent> mergingComponents = ctx.getComponentHolder();
+        opCtx.getComponentHolder().addAll(mergingComponents);
+        ITreeIndexCursor cursor = new LSMBTreeRangeSearchCursor(opCtx);
+        RangePredicate rangePred = new RangePredicate(null, null, true, true, null, null);
+        search(opCtx, cursor, rangePred);
+
+        opCtx.setOperation(IndexOperation.MERGE);
+        BTree firstBTree = (BTree) ((LSMBTreeImmutableComponent) mergingComponents.get(0)).getBTree();
+        BTree lastBTree = (BTree) ((LSMBTreeImmutableComponent) mergingComponents.get(mergingComponents.size() - 1))
+                .getBTree();
+        FileReference firstFile = diskFileMapProvider.lookupFileName(firstBTree.getFileId());
+        FileReference lastFile = diskFileMapProvider.lookupFileName(lastBTree.getFileId());
+        LSMComponentFileReferences relMergeFileRefs = fileManager.getRelMergeFileReference(firstFile.getFile()
+                .getName(), lastFile.getFile().getName());
+        ILSMIndexAccessorInternal accessor = new LSMBTreeAccessor(lsmHarness, opCtx);
+        ioScheduler.scheduleOperation(new LSMBTreeMergeOperation(accessor, mergingComponents, cursor, relMergeFileRefs
+                .getInsertIndexFileReference(), relMergeFileRefs.getBloomFilterFileReference(), callback));
+    }
+
+    @Override
+    public ILSMComponent merge(List<ILSMComponent> mergedComponents, ILSMIOOperation operation)
+            throws HyracksDataException, IndexException {
+        LSMBTreeMergeOperation mergeOp = (LSMBTreeMergeOperation) operation;
+        ITreeIndexCursor cursor = mergeOp.getCursor();
+        mergedComponents.addAll(mergeOp.getMergingComponents());
+
+        long numElements = 0L;
+        for (int i = 0; i < mergedComponents.size(); ++i) {
+            numElements += ((LSMBTreeImmutableComponent) mergedComponents.get(i)).getBloomFilter().getNumElements();
+        }
+
+        int maxBucketsPerElement = BloomCalculations.maxBucketsPerElement(numElements);
+        BloomFilterSpecification bloomFilterSpec = BloomCalculations.computeBloomSpec(maxBucketsPerElement,
+                MAX_BLOOM_FILTER_ACCEPTABLE_FALSE_POSITIVE_RATE);
+        LSMBTreeImmutableComponent mergedComponent = createDiskComponent(componentFactory,
+                mergeOp.getBTreeMergeTarget(), mergeOp.getBloomFilterMergeTarget(), true);
+
+        IIndexBulkLoader bulkLoader = mergedComponent.getBTree().createBulkLoader(1.0f, false, numElements);
+        IIndexBulkLoader builder = mergedComponent.getBloomFilter().createBuilder(numElements,
+                bloomFilterSpec.getNumHashes(), bloomFilterSpec.getNumBucketsPerElements());
+        try {
+            while (cursor.hasNext()) {
+                cursor.next();
+                ITupleReference frameTuple = cursor.getTuple();
+                builder.add(frameTuple);
+                bulkLoader.add(frameTuple);
+            }
+        } finally {
+            cursor.close();
+            builder.end();
+        }
+        bulkLoader.end();
+        return mergedComponent;
+    }
+
+    private LSMBTreeImmutableComponent createDiskComponent(LSMBTreeImmutableComponentFactory factory,
+            FileReference btreeFileRef, FileReference bloomFilterFileRef, boolean createComponent)
+            throws HyracksDataException, IndexException {
+        // Create new BTree instance.
+        LSMBTreeImmutableComponent component = (LSMBTreeImmutableComponent) factory
+                .createLSMComponentInstance(new LSMComponentFileReferences(btreeFileRef, null, bloomFilterFileRef));
+        if (createComponent) {
+            component.getBTree().create();
+            component.getBloomFilter().create();
+        }
+        // BTree will be closed during cleanup of merge().
+        component.getBTree().activate();
+        component.getBloomFilter().activate();
+        return component;
+    }
+
+    @Override
+    public IIndexBulkLoader createBulkLoader(float fillLevel, boolean verifyInput, long numElementsHint)
+            throws TreeIndexException {
+        try {
+            return new LSMBTreeBulkLoader(fillLevel, verifyInput, numElementsHint);
+        } catch (HyracksDataException e) {
+            throw new TreeIndexException(e);
+        }
+    }
+
+    private ILSMComponent createBulkLoadTarget() throws HyracksDataException, IndexException {
+        LSMComponentFileReferences componentFileRefs = fileManager.getRelFlushFileReference();
+        return createDiskComponent(bulkLoadComponentFactory, componentFileRefs.getInsertIndexFileReference(),
+                componentFileRefs.getBloomFilterFileReference(), true);
+    }
+
+    @Override
+    public void markAsValid(ILSMComponent lsmComponent) throws HyracksDataException {
+        // The order of forcing the dirty page to be flushed is critical. The
+        // bloom filter must be always done first.
+        LSMBTreeImmutableComponent component = (LSMBTreeImmutableComponent) lsmComponent;
+        // Flush the bloom filter first.
+        int fileId = component.getBloomFilter().getFileId();
+        IBufferCache bufferCache = component.getBTree().getBufferCache();
+        int startPage = 0;
+        int maxPage = component.getBloomFilter().getNumPages();
+        forceFlushDirtyPages(bufferCache, fileId, startPage, maxPage);
+        forceFlushDirtyPages(component.getBTree());
+        markAsValidInternal(component.getBTree());
+    }
+
+    public class LSMBTreeBulkLoader implements IIndexBulkLoader {
+        private final ILSMComponent component;
+        private final BTreeBulkLoader bulkLoader;
+        private final IIndexBulkLoader builder;
+        private boolean endHasBeenCalled = false;
+
+        public LSMBTreeBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
+                throws TreeIndexException, HyracksDataException {
+            try {
+                component = createBulkLoadTarget();
+            } catch (HyracksDataException e) {
+                throw new TreeIndexException(e);
+            } catch (IndexException e) {
+                throw new TreeIndexException(e);
+            }
+            bulkLoader = (BTreeBulkLoader) ((LSMBTreeImmutableComponent) component).getBTree().createBulkLoader(
+                    fillFactor, verifyInput, numElementsHint);
+
+            int maxBucketsPerElement = BloomCalculations.maxBucketsPerElement(numElementsHint);
+            BloomFilterSpecification bloomFilterSpec = BloomCalculations.computeBloomSpec(maxBucketsPerElement,
+                    MAX_BLOOM_FILTER_ACCEPTABLE_FALSE_POSITIVE_RATE);
+            builder = ((LSMBTreeImmutableComponent) component).getBloomFilter().createBuilder(numElementsHint,
+                    bloomFilterSpec.getNumHashes(), bloomFilterSpec.getNumBucketsPerElements());
+        }
+
+        @Override
+        public void add(ITupleReference tuple) throws IndexException, HyracksDataException {
+            try {
+                bulkLoader.add(tuple);
+                builder.add(tuple);
+            } catch (IndexException e) {
+                handleException();
+                throw e;
+            } catch (HyracksDataException e) {
+                handleException();
+                throw e;
+            } catch (RuntimeException e) {
+                handleException();
+                throw e;
+            }
+        }
+
+        protected void handleException() throws HyracksDataException, IndexException {
+            if (!endHasBeenCalled) {
+                builder.end();
+            }
+            ((LSMBTreeImmutableComponent) component).getBTree().deactivate();
+            ((LSMBTreeImmutableComponent) component).getBTree().destroy();
+            ((LSMBTreeImmutableComponent) component).getBloomFilter().deactivate();
+            ((LSMBTreeImmutableComponent) component).getBloomFilter().destroy();
+        }
+
+        @Override
+        public void end() throws HyracksDataException, IndexException {
+            bulkLoader.end();
+            builder.end();
+            endHasBeenCalled = true;
+            lsmHarness.addBulkLoadedComponent(component);
+        }
+
+    }
+
+    public LSMBTreeOpContext createOpContext(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback) {
+        return new LSMBTreeOpContext(mutableComponent.getBTree(), insertLeafFrameFactory, deleteLeafFrameFactory,
+                modificationCallback, searchCallback, componentFactory.getBloomFilterKeyFields().length);
+    }
+
+    @Override
+    public ILSMIndexAccessorInternal createAccessor(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback) {
+        return new LSMBTreeAccessor(lsmHarness, createOpContext(modificationCallback, searchCallback));
+    }
+
+    public class LSMBTreeAccessor extends LSMTreeIndexAccessor {
+        public LSMBTreeAccessor(ILSMHarness lsmHarness, ILSMIndexOperationContext ctx) {
+            super(lsmHarness, ctx);
+        }
+
+        @Override
+        public IIndexCursor createSearchCursor() {
+            return new LSMBTreeSearchCursor(ctx);
+        }
+
+        public MultiComparator getMultiComparator() {
+            LSMBTreeOpContext concreteCtx = (LSMBTreeOpContext) ctx;
+            return concreteCtx.cmp;
+        }
+    }
+
+    @Override
+    public IBufferCache getBufferCache() {
+        return diskBufferCache;
+    }
+
+    public IBinaryComparatorFactory[] getComparatorFactories() {
+        return cmpFactories;
+    }
+
+    @Override
+    public ITreeIndexFrameFactory getInteriorFrameFactory() {
+        return mutableComponent.getBTree().getInteriorFrameFactory();
+    }
+
+    @Override
+    public int getFieldCount() {
+        return mutableComponent.getBTree().getFieldCount();
+    }
+
+    @Override
+    public int getFileId() {
+        return mutableComponent.getBTree().getFileId();
+    }
+
+    @Override
+    public IFreePageManager getFreePageManager() {
+        return mutableComponent.getBTree().getFreePageManager();
+    }
+
+    @Override
+    public ITreeIndexFrameFactory getLeafFrameFactory() {
+        return mutableComponent.getBTree().getLeafFrameFactory();
+    }
+
+    @Override
+    public long getMemoryAllocationSize() {
+        InMemoryBufferCache memBufferCache = (InMemoryBufferCache) mutableComponent.getBTree().getBufferCache();
+        return memBufferCache.getNumPages() * memBufferCache.getPageSize();
+    }
+
+    @Override
+    public int getRootPageId() {
+        return mutableComponent.getBTree().getRootPageId();
+    }
+
+    public boolean isEmptyIndex() throws HyracksDataException {
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        return immutableComponents.isEmpty()
+                && mutableComponent.getBTree().isEmptyTree(
+                        mutableComponent.getBTree().getInteriorFrameFactory().createFrame());
+    }
+
+    @Override
+    public void validate() throws HyracksDataException {
+        mutableComponent.getBTree().validate();
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        for (ILSMComponent c : immutableComponents) {
+            BTree btree = (BTree) ((LSMBTreeImmutableComponent) c).getBTree();
+            btree.validate();
+        }
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeCursorInitialState.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeCursorInitialState.java
new file mode 100644
index 0000000..2b7029b
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeCursorInitialState.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.impls;
+
+import java.util.List;
+
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+
+public class LSMBTreeCursorInitialState implements ICursorInitialState {
+
+    private final int numBTrees;
+    private final ITreeIndexFrameFactory leafFrameFactory;
+    private MultiComparator cmp;
+    private final MultiComparator bloomFilterCmp;
+    private final boolean includeMemComponent;
+    private final ILSMHarness lsmHarness;
+
+    private final IIndexAccessor memBtreeAccessor;
+    private final ISearchPredicate predicate;
+    private ISearchOperationCallback searchCallback;
+
+    private final List<ILSMComponent> operationalComponents;
+
+    public LSMBTreeCursorInitialState(int numBTrees, ITreeIndexFrameFactory leafFrameFactory, MultiComparator cmp,
+            MultiComparator bloomFilterCmp, boolean includeMemComponent, ILSMHarness lsmHarness,
+            IIndexAccessor memBtreeAccessor, ISearchPredicate predicate, ISearchOperationCallback searchCallback,
+            List<ILSMComponent> operationalComponents) {
+        this.numBTrees = numBTrees;
+        this.leafFrameFactory = leafFrameFactory;
+        this.cmp = cmp;
+        this.bloomFilterCmp = bloomFilterCmp;
+        this.includeMemComponent = includeMemComponent;
+        this.lsmHarness = lsmHarness;
+        this.searchCallback = searchCallback;
+        this.memBtreeAccessor = memBtreeAccessor;
+        this.predicate = predicate;
+        this.operationalComponents = operationalComponents;
+    }
+
+    public int getNumBTrees() {
+        return numBTrees;
+    }
+
+    public ITreeIndexFrameFactory getLeafFrameFactory() {
+        return leafFrameFactory;
+    }
+
+    @Override
+    public ICachedPage getPage() {
+        return null;
+    }
+
+    @Override
+    public void setPage(ICachedPage page) {
+    }
+
+    public boolean getIncludeMemComponent() {
+        return includeMemComponent;
+    }
+
+    public ILSMHarness getLSMHarness() {
+        return lsmHarness;
+    }
+
+    @Override
+    public ISearchOperationCallback getSearchOperationCallback() {
+        return searchCallback;
+    }
+
+    @Override
+    public void setSearchOperationCallback(ISearchOperationCallback searchCallback) {
+        this.searchCallback = searchCallback;
+    }
+
+    public List<ILSMComponent> getOperationalComponents() {
+        return operationalComponents;
+    }
+
+    public IIndexAccessor getMemBTreeAccessor() {
+        return memBtreeAccessor;
+    }
+
+    public ISearchPredicate getSearchPredicate() {
+        return predicate;
+    }
+
+    public MultiComparator getBloomFilterComparator() {
+        return bloomFilterCmp;
+    }
+
+    @Override
+    public MultiComparator getOriginalKeyComparator() {
+        return cmp;
+    }
+
+    @Override
+    public void setOriginialKeyComparator(MultiComparator originalCmp) {
+        this.cmp = originalCmp;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeFileManager.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeFileManager.java
new file mode 100644
index 0000000..bbcee06
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeFileManager.java
@@ -0,0 +1,165 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.impls;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Date;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractLSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class LSMBTreeFileManager extends AbstractLSMIndexFileManager {
+    private static final String BTREE_STRING = "b";
+
+    private final TreeIndexFactory<? extends ITreeIndex> btreeFactory;
+
+    public LSMBTreeFileManager(IIOManager ioManager, IFileMapProvider fileMapProvider, FileReference file,
+            TreeIndexFactory<? extends ITreeIndex> btreeFactory, int startIODeviceIndex) {
+        super(ioManager, fileMapProvider, file, null, startIODeviceIndex);
+        this.btreeFactory = btreeFactory;
+    }
+
+    @Override
+    public LSMComponentFileReferences getRelFlushFileReference() {
+        Date date = new Date();
+        String ts = formatter.format(date);
+        String baseName = baseDir + ts + SPLIT_STRING + ts;
+        // Begin timestamp and end timestamp are identical since it is a flush
+        return new LSMComponentFileReferences(createFlushFile(baseName + SPLIT_STRING + BTREE_STRING), null,
+                createFlushFile(baseName + SPLIT_STRING + BLOOM_FILTER_STRING));
+    }
+
+    @Override
+    public LSMComponentFileReferences getRelMergeFileReference(String firstFileName, String lastFileName)
+            throws HyracksDataException {
+        String[] firstTimestampRange = firstFileName.split(SPLIT_STRING);
+        String[] lastTimestampRange = lastFileName.split(SPLIT_STRING);
+
+        String baseName = baseDir + firstTimestampRange[0] + SPLIT_STRING + lastTimestampRange[1];
+        // Get the range of timestamps by taking the earliest and the latest timestamps
+        return new LSMComponentFileReferences(createMergeFile(baseName + SPLIT_STRING + BTREE_STRING), null,
+                createMergeFile(baseName + SPLIT_STRING + BLOOM_FILTER_STRING));
+    }
+
+    private static FilenameFilter btreeFilter = new FilenameFilter() {
+        public boolean accept(File dir, String name) {
+            return !name.startsWith(".") && name.endsWith(BTREE_STRING);
+        }
+    };
+
+    @Override
+    public List<LSMComponentFileReferences> cleanupAndGetValidFiles() throws HyracksDataException, IndexException {
+        List<LSMComponentFileReferences> validFiles = new ArrayList<LSMComponentFileReferences>();
+        ArrayList<ComparableFileName> allBTreeFiles = new ArrayList<ComparableFileName>();
+        ArrayList<ComparableFileName> allBloomFilterFiles = new ArrayList<ComparableFileName>();
+
+        // Gather files from all IODeviceHandles.
+        for (IODeviceHandle dev : ioManager.getIODevices()) {
+            // List of valid BTree files.
+            cleanupAndGetValidFilesInternal(dev, btreeFilter, btreeFactory, allBTreeFiles);
+            HashSet<String> btreeFilesSet = new HashSet<String>();
+            for (ComparableFileName cmpFileName : allBTreeFiles) {
+                int index = cmpFileName.fileName.lastIndexOf(SPLIT_STRING);
+                btreeFilesSet.add(cmpFileName.fileName.substring(0, index));
+            }
+            validateFiles(dev, btreeFilesSet, allBloomFilterFiles, bloomFilterFilter, null);
+        }
+
+        // Sanity check.
+        if (allBTreeFiles.size() != allBloomFilterFiles.size()) {
+            throw new HyracksDataException(
+                    "Unequal number of valid BTree and bloom filter files found. Aborting cleanup.");
+        }
+
+        // Trivial cases.
+        if (allBTreeFiles.isEmpty() || allBloomFilterFiles.isEmpty()) {
+            return validFiles;
+        }
+
+        if (allBTreeFiles.size() == 1 && allBloomFilterFiles.size() == 1) {
+            validFiles.add(new LSMComponentFileReferences(allBTreeFiles.get(0).fileRef, null, allBloomFilterFiles
+                    .get(0).fileRef));
+            return validFiles;
+        }
+
+        // Sorts files names from earliest to latest timestamp.
+        Collections.sort(allBTreeFiles);
+        Collections.sort(allBloomFilterFiles);
+
+        List<ComparableFileName> validComparableBTreeFiles = new ArrayList<ComparableFileName>();
+        ComparableFileName lastBTree = allBTreeFiles.get(0);
+        validComparableBTreeFiles.add(lastBTree);
+
+        List<ComparableFileName> validComparableBloomFilterFiles = new ArrayList<ComparableFileName>();
+        ComparableFileName lastBloomFilter = allBloomFilterFiles.get(0);
+        validComparableBloomFilterFiles.add(lastBloomFilter);
+
+        for (int i = 1; i < allBTreeFiles.size(); i++) {
+            ComparableFileName currentBTree = allBTreeFiles.get(i);
+            ComparableFileName currentBloomFilter = allBloomFilterFiles.get(i);
+            // Current start timestamp is greater than last stop timestamp.
+            if (currentBTree.interval[0].compareTo(lastBTree.interval[1]) > 0
+                    && currentBloomFilter.interval[0].compareTo(lastBloomFilter.interval[1]) > 0) {
+                validComparableBTreeFiles.add(currentBTree);
+                validComparableBloomFilterFiles.add(currentBloomFilter);
+                lastBTree = currentBTree;
+                lastBloomFilter = currentBloomFilter;
+            } else if (currentBTree.interval[0].compareTo(lastBTree.interval[0]) >= 0
+                    && currentBTree.interval[1].compareTo(lastBTree.interval[1]) <= 0
+                    && currentBloomFilter.interval[0].compareTo(lastBloomFilter.interval[0]) >= 0
+                    && currentBloomFilter.interval[1].compareTo(lastBloomFilter.interval[1]) <= 0) {
+                // Invalid files are completely contained in last interval.
+                File invalidBTreeFile = new File(currentBTree.fullPath);
+                invalidBTreeFile.delete();
+                File invalidBloomFilterFile = new File(currentBloomFilter.fullPath);
+                invalidBloomFilterFile.delete();
+            } else {
+                // This scenario should not be possible.
+                throw new HyracksDataException("Found LSM files with overlapping but not contained timetamp intervals.");
+            }
+        }
+
+        // Sort valid files in reverse lexicographical order, such that newer
+        // files come first.
+        Collections.sort(validComparableBTreeFiles, recencyCmp);
+        Collections.sort(validComparableBloomFilterFiles, recencyCmp);
+
+        Iterator<ComparableFileName> btreeFileIter = validComparableBTreeFiles.iterator();
+        Iterator<ComparableFileName> bloomFilterFileIter = validComparableBloomFilterFiles.iterator();
+        while (btreeFileIter.hasNext() && bloomFilterFileIter.hasNext()) {
+            ComparableFileName cmpBTreeFileName = btreeFileIter.next();
+            ComparableFileName cmpBloomFilterFileName = bloomFilterFileIter.next();
+            validFiles.add(new LSMComponentFileReferences(cmpBTreeFileName.fileRef, null,
+                    cmpBloomFilterFileName.fileRef));
+        }
+
+        return validFiles;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeFlushOperation.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeFlushOperation.java
new file mode 100644
index 0000000..dfda07b
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeFlushOperation.java
@@ -0,0 +1,71 @@
+package edu.uci.ics.hyracks.storage.am.lsm.btree.impls;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessorInternal;
+
+public class LSMBTreeFlushOperation implements ILSMIOOperation {
+
+    private final ILSMIndexAccessorInternal accessor;
+    private final ILSMComponent flushingComponent;
+    private final FileReference btreeFlushTarget;
+    private final FileReference bloomFilterFlushTarget;
+    private final ILSMIOOperationCallback callback;
+
+    public LSMBTreeFlushOperation(ILSMIndexAccessorInternal accessor, ILSMComponent flushingComponent,
+            FileReference btreeFlushTarget, FileReference bloomFilterFlushTarget, ILSMIOOperationCallback callback) {
+        this.accessor = accessor;
+        this.flushingComponent = flushingComponent;
+        this.btreeFlushTarget = btreeFlushTarget;
+        this.bloomFilterFlushTarget = bloomFilterFlushTarget;
+        this.callback = callback;
+    }
+
+    @Override
+    public Set<IODeviceHandle> getReadDevices() {
+        return Collections.emptySet();
+    }
+
+    @Override
+    public Set<IODeviceHandle> getWriteDevices() {
+        Set<IODeviceHandle> devs = new HashSet<IODeviceHandle>();
+        devs.add(btreeFlushTarget.getDeviceHandle());
+        devs.add(bloomFilterFlushTarget.getDeviceHandle());
+        return devs;
+    }
+
+    @Override
+    public void perform() throws HyracksDataException, IndexException {
+        accessor.flush(this);
+    }
+
+    @Override
+    public ILSMIOOperationCallback getCallback() {
+        return callback;
+    }
+
+    public FileReference getBTreeFlushTarget() {
+        return btreeFlushTarget;
+    }
+
+    public FileReference getBloomFilterFlushTarget() {
+        return bloomFilterFlushTarget;
+    }
+
+    public ILSMIndexAccessorInternal getAccessor() {
+        return accessor;
+    }
+
+    public ILSMComponent getFlushingComponent() {
+        return flushingComponent;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeImmutableComponent.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeImmutableComponent.java
new file mode 100644
index 0000000..daa86d9
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeImmutableComponent.java
@@ -0,0 +1,32 @@
+package edu.uci.ics.hyracks.storage.am.lsm.btree.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilter;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractImmutableLSMComponent;
+
+public class LSMBTreeImmutableComponent extends AbstractImmutableLSMComponent {
+    private final BTree btree;
+    private final BloomFilter bloomFilter;
+
+    public LSMBTreeImmutableComponent(BTree btree, BloomFilter bloomFilter) {
+        this.btree = btree;
+        this.bloomFilter = bloomFilter;
+    }
+
+    @Override
+    public void destroy() throws HyracksDataException {
+        btree.deactivate();
+        btree.destroy();
+        bloomFilter.deactivate();
+        bloomFilter.destroy();
+    }
+
+    public BTree getBTree() {
+        return btree;
+    }
+
+    public BloomFilter getBloomFilter() {
+        return bloomFilter;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeImmutableComponentFactory.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeImmutableComponentFactory.java
new file mode 100644
index 0000000..e9da5a5
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeImmutableComponentFactory.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilterFactory;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponentFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+
+public class LSMBTreeImmutableComponentFactory implements ILSMComponentFactory {
+    private final TreeIndexFactory<BTree> btreeFactory;
+    private final BloomFilterFactory bloomFilterFactory;
+
+    public LSMBTreeImmutableComponentFactory(TreeIndexFactory<BTree> btreeFactory, BloomFilterFactory bloomFilterFactory) {
+        this.btreeFactory = btreeFactory;
+        this.bloomFilterFactory = bloomFilterFactory;
+    }
+
+    @Override
+    public ILSMComponent createLSMComponentInstance(LSMComponentFileReferences cfr) throws IndexException,
+            HyracksDataException {
+        return new LSMBTreeImmutableComponent(btreeFactory.createIndexInstance(cfr.getInsertIndexFileReference()),
+                bloomFilterFactory.createBloomFiltertInstance(cfr.getBloomFilterFileReference()));
+    }
+
+    @Override
+    public IBufferCache getBufferCache() {
+        return btreeFactory.getBufferCache();
+    }
+
+    public int[] getBloomFilterKeyFields() {
+        return bloomFilterFactory.getBloomFilterKeyFields();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeMergeOperation.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeMergeOperation.java
new file mode 100644
index 0000000..180fb9a
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeMergeOperation.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.impls;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessorInternal;
+
+public class LSMBTreeMergeOperation implements ILSMIOOperation {
+
+    private final ILSMIndexAccessorInternal accessor;
+    private final List<ILSMComponent> mergingComponents;
+    private final ITreeIndexCursor cursor;
+    private final FileReference btreeMergeTarget;
+    private final FileReference bloomFilterMergeTarget;
+    private final ILSMIOOperationCallback callback;
+
+    public LSMBTreeMergeOperation(ILSMIndexAccessorInternal accessor, List<ILSMComponent> mergingComponents,
+            ITreeIndexCursor cursor, FileReference btreeMergeTarget, FileReference bloomFilterMergeTarget,
+            ILSMIOOperationCallback callback) {
+        this.accessor = accessor;
+        this.mergingComponents = mergingComponents;
+        this.cursor = cursor;
+        this.btreeMergeTarget = btreeMergeTarget;
+        this.bloomFilterMergeTarget = bloomFilterMergeTarget;
+        this.callback = callback;
+    }
+
+    @Override
+    public Set<IODeviceHandle> getReadDevices() {
+        Set<IODeviceHandle> devs = new HashSet<IODeviceHandle>();
+        for (ILSMComponent o : mergingComponents) {
+            LSMBTreeImmutableComponent component = (LSMBTreeImmutableComponent) o;
+            devs.add(component.getBTree().getFileReference().getDeviceHandle());
+            devs.add(component.getBloomFilter().getFileReference().getDeviceHandle());
+        }
+        return devs;
+    }
+
+    @Override
+    public Set<IODeviceHandle> getWriteDevices() {
+        Set<IODeviceHandle> devs = new HashSet<IODeviceHandle>();
+        devs.add(btreeMergeTarget.getDeviceHandle());
+        devs.add(bloomFilterMergeTarget.getDeviceHandle());
+        return devs;
+    }
+
+    @Override
+    public void perform() throws HyracksDataException, IndexException {
+        accessor.merge(this);
+    }
+
+    @Override
+    public ILSMIOOperationCallback getCallback() {
+        return callback;
+    }
+
+    public FileReference getBTreeMergeTarget() {
+        return btreeMergeTarget;
+    }
+
+    public FileReference getBloomFilterMergeTarget() {
+        return bloomFilterMergeTarget;
+    }
+
+    public ITreeIndexCursor getCursor() {
+        return cursor;
+    }
+
+    public List<ILSMComponent> getMergingComponents() {
+        return mergingComponents;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeMutableComponent.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeMutableComponent.java
new file mode 100644
index 0000000..d340599
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeMutableComponent.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractMutableLSMComponent;
+
+public class LSMBTreeMutableComponent extends AbstractMutableLSMComponent {
+
+    private final BTree btree;
+    private final IInMemoryFreePageManager mfpm;
+
+    public LSMBTreeMutableComponent(BTree btree, IInMemoryFreePageManager mfpm) {
+        this.btree = btree;
+        this.mfpm = mfpm;
+    }
+
+    public BTree getBTree() {
+        return btree;
+    }
+
+    @Override
+    protected boolean isFull() {
+        return mfpm.isFull();
+    }
+
+    @Override
+    protected void reset() throws HyracksDataException {
+        super.reset();
+        btree.clear();
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeOpContext.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeOpContext.java
new file mode 100644
index 0000000..9400d2d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeOpContext.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.impls;
+
+import java.util.LinkedList;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeOpContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+
+public final class LSMBTreeOpContext implements ILSMIndexOperationContext {
+
+    public ITreeIndexFrameFactory insertLeafFrameFactory;
+    public ITreeIndexFrameFactory deleteLeafFrameFactory;
+    public IBTreeLeafFrame insertLeafFrame;
+    public IBTreeLeafFrame deleteLeafFrame;
+    public final BTree memBTree;
+    public BTree.BTreeAccessor memBTreeAccessor;
+    public BTreeOpContext memBTreeOpCtx;
+    public IndexOperation op;
+    public final MultiComparator cmp;
+    public final MultiComparator bloomFilterCmp;
+    public final IModificationOperationCallback modificationCallback;
+    public final ISearchOperationCallback searchCallback;
+    private final List<ILSMComponent> componentHolder;
+
+    public LSMBTreeOpContext(BTree memBTree, ITreeIndexFrameFactory insertLeafFrameFactory,
+            ITreeIndexFrameFactory deleteLeafFrameFactory, IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback, int numBloomFilterKeyFields) {
+        IBinaryComparatorFactory cmpFactories[] = memBTree.getComparatorFactories();
+        if (cmpFactories[0] != null) {
+            this.cmp = MultiComparator.createIgnoreFieldLength(memBTree.getComparatorFactories());
+        } else {
+            this.cmp = null;
+        }
+
+        bloomFilterCmp = MultiComparator.createIgnoreFieldLength(memBTree.getComparatorFactories(), 0,
+                numBloomFilterKeyFields);
+
+        this.memBTree = memBTree;
+        this.insertLeafFrameFactory = insertLeafFrameFactory;
+        this.deleteLeafFrameFactory = deleteLeafFrameFactory;
+        this.insertLeafFrame = (IBTreeLeafFrame) insertLeafFrameFactory.createFrame();
+        this.deleteLeafFrame = (IBTreeLeafFrame) deleteLeafFrameFactory.createFrame();
+        if (insertLeafFrame != null && this.cmp != null) {
+            insertLeafFrame.setMultiComparator(cmp);
+        }
+        if (deleteLeafFrame != null && this.cmp != null) {
+            deleteLeafFrame.setMultiComparator(cmp);
+        }
+        this.componentHolder = new LinkedList<ILSMComponent>();
+        this.modificationCallback = modificationCallback;
+        this.searchCallback = searchCallback;
+    }
+
+    @Override
+    public void setOperation(IndexOperation newOp) {
+        reset();
+        this.op = newOp;
+        switch (newOp) {
+            case SEARCH:
+                setMemBTreeAccessor();
+                break;
+            case DISKORDERSCAN:
+            case UPDATE:
+                // Attention: It is important to leave the leafFrame and
+                // leafFrameFactory of the memBTree as is when doing an update.
+                // Update will only be set if a previous attempt to delete or
+                // insert failed, so we must preserve the semantics of the
+                // previously requested operation.
+                setMemBTreeAccessor();
+                return;
+            case UPSERT:
+            case INSERT:
+                setInsertMode();
+                break;
+            case PHYSICALDELETE:
+            case DELETE:
+                setDeleteMode();
+                break;
+        }
+    }
+
+    private void setMemBTreeAccessor() {
+        if (memBTreeAccessor == null) {
+            memBTreeAccessor = (BTree.BTreeAccessor) memBTree.createAccessor(modificationCallback,
+                    NoOpOperationCallback.INSTANCE);
+            memBTreeOpCtx = memBTreeAccessor.getOpContext();
+        }
+    }
+
+    public void setInsertMode() {
+        setMemBTreeAccessor();
+        memBTreeOpCtx.leafFrame = insertLeafFrame;
+        memBTreeOpCtx.leafFrameFactory = insertLeafFrameFactory;
+    }
+
+    public void setDeleteMode() {
+        setMemBTreeAccessor();
+        memBTreeOpCtx.leafFrame = deleteLeafFrame;
+        memBTreeOpCtx.leafFrameFactory = deleteLeafFrameFactory;
+    }
+
+    @Override
+    public void reset() {
+        componentHolder.clear();
+    }
+
+    public IndexOperation getOperation() {
+        return op;
+    }
+
+    @Override
+    public List<ILSMComponent> getComponentHolder() {
+        return componentHolder;
+    }
+
+    @Override
+    public ISearchOperationCallback getSearchOperationCallback() {
+        return searchCallback;
+    }
+
+    @Override
+    public IModificationOperationCallback getModificationCallback() {
+        return modificationCallback;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreePointSearchCursor.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreePointSearchCursor.java
new file mode 100644
index 0000000..0204833
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreePointSearchCursor.java
@@ -0,0 +1,224 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.impls;
+
+import java.util.ListIterator;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeRangeSearchCursor;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMTreeTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BloomFilterAwareBTreePointSearchCursor;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+
+public class LSMBTreePointSearchCursor implements ITreeIndexCursor {
+
+    private IIndexCursor[] rangeCursors;
+    private final ILSMIndexOperationContext opCtx;
+    private ISearchOperationCallback searchCallback;
+    private RangePredicate predicate;
+    private IIndexAccessor memBTreeAccessor;
+    private boolean includeMemComponent;
+    private int numBTrees;
+    private IIndexAccessor[] bTreeAccessors;
+    private ILSMHarness lsmHarness;
+    private boolean nextHasBeenCalled;
+    private boolean foundTuple;
+    private ITupleReference frameTuple;
+
+    public LSMBTreePointSearchCursor(ILSMIndexOperationContext opCtx) {
+        this.opCtx = opCtx;
+    }
+
+    @Override
+    public boolean hasNext() throws HyracksDataException, IndexException {
+        if (nextHasBeenCalled) {
+            return false;
+        } else if (foundTuple) {
+            return true;
+        }
+        boolean reconciled = false;
+        for (int i = 0; i < numBTrees; ++i) {
+            bTreeAccessors[i].search(rangeCursors[i], predicate);
+            if (rangeCursors[i].hasNext()) {
+                rangeCursors[i].next();
+                // We use the predicate's to lock the key instead of the tuple that we get from cursor to avoid copying the tuple when we do the "unlatch dance"
+                if (reconciled || searchCallback.proceed(predicate.getLowKey())) {
+                    // if proceed is successful, then there's no need for doing the "unlatch dance"
+                    if (((ILSMTreeTupleReference) rangeCursors[i].getTuple()).isAntimatter()) {
+                        searchCallback.cancel(predicate.getLowKey());
+                        rangeCursors[i].close();
+                        return false;
+                    } else {
+                        frameTuple = rangeCursors[i].getTuple();
+                        foundTuple = true;
+                        return true;
+                    }
+                }
+                if (i == 0 && includeMemComponent) {
+                    // unlatch/unpin
+                    rangeCursors[i].reset();
+                    searchCallback.reconcile(predicate.getLowKey());
+                    reconciled = true;
+
+                    // retraverse
+                    memBTreeAccessor.search(rangeCursors[i], predicate);
+                    if (rangeCursors[i].hasNext()) {
+                        rangeCursors[i].next();
+                        if (((ILSMTreeTupleReference) rangeCursors[i].getTuple()).isAntimatter()) {
+                            searchCallback.cancel(predicate.getLowKey());
+                            rangeCursors[i].close();
+                            return false;
+                        } else {
+                            frameTuple = rangeCursors[i].getTuple();
+                            foundTuple = true;
+                            return true;
+                        }
+                    } else {
+                        rangeCursors[i].close();
+                    }
+                } else {
+                    frameTuple = rangeCursors[i].getTuple();
+                    searchCallback.reconcile(frameTuple);
+                    foundTuple = true;
+                    return true;
+                }
+            } else {
+                rangeCursors[i].close();
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public void reset() throws HyracksDataException, IndexException {
+        if (rangeCursors != null) {
+            for (int i = 0; i < rangeCursors.length; ++i) {
+                rangeCursors[i].reset();
+            }
+        }
+        rangeCursors = null;
+        nextHasBeenCalled = false;
+        foundTuple = false;
+    }
+
+    @Override
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws HyracksDataException {
+        LSMBTreeCursorInitialState lsmInitialState = (LSMBTreeCursorInitialState) initialState;
+        includeMemComponent = lsmInitialState.getIncludeMemComponent();
+        lsmHarness = lsmInitialState.getLSMHarness();
+        searchCallback = lsmInitialState.getSearchOperationCallback();
+        memBTreeAccessor = lsmInitialState.getMemBTreeAccessor();
+        predicate = (RangePredicate) lsmInitialState.getSearchPredicate();
+
+        numBTrees = lsmInitialState.getNumBTrees();
+        rangeCursors = new IIndexCursor[numBTrees];
+        int i = 0;
+        if (includeMemComponent) {
+            // No need for a bloom filter for the in-memory BTree.
+            IBTreeLeafFrame leafFrame = (IBTreeLeafFrame) lsmInitialState.getLeafFrameFactory().createFrame();
+            rangeCursors[i] = new BTreeRangeSearchCursor(leafFrame, false);
+            ++i;
+        }
+        for (; i < numBTrees; ++i) {
+            IBTreeLeafFrame leafFrame = (IBTreeLeafFrame) lsmInitialState.getLeafFrameFactory().createFrame();
+            rangeCursors[i] = new BloomFilterAwareBTreePointSearchCursor(leafFrame, false,
+                    ((LSMBTreeImmutableComponent) lsmInitialState.getOperationalComponents().get(i)).getBloomFilter());
+        }
+
+        bTreeAccessors = new IIndexAccessor[numBTrees];
+        int cursorIx = 0;
+        ListIterator<ILSMComponent> btreesIter = lsmInitialState.getOperationalComponents().listIterator();
+        if (includeMemComponent) {
+            bTreeAccessors[cursorIx] = memBTreeAccessor;
+            ++cursorIx;
+            btreesIter.next();
+        }
+
+        while (btreesIter.hasNext()) {
+            BTree diskBTree = ((LSMBTreeImmutableComponent) btreesIter.next()).getBTree();
+            bTreeAccessors[cursorIx] = diskBTree.createAccessor(NoOpOperationCallback.INSTANCE,
+                    NoOpOperationCallback.INSTANCE);
+            cursorIx++;
+        }
+        nextHasBeenCalled = false;
+        foundTuple = false;
+    }
+
+    @Override
+    public void next() throws HyracksDataException {
+        nextHasBeenCalled = true;
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        if (lsmHarness != null) {
+            try {
+                for (int i = 0; i < rangeCursors.length; i++) {
+                    rangeCursors[i].close();
+                }
+                rangeCursors = null;
+            } finally {
+                lsmHarness.endSearch(opCtx);
+            }
+        }
+        nextHasBeenCalled = false;
+        foundTuple = false;
+    }
+
+    @Override
+    public ITupleReference getTuple() {
+        return frameTuple;
+    }
+
+    @Override
+    public ICachedPage getPage() {
+        // do nothing
+        return null;
+    }
+
+    @Override
+    public void setBufferCache(IBufferCache bufferCache) {
+        // do nothing
+
+    }
+
+    @Override
+    public void setFileId(int fileId) {
+        // do nothing
+
+    }
+
+    @Override
+    public boolean exclusiveLatchNodes() {
+        return false;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeRangeSearchCursor.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeRangeSearchCursor.java
new file mode 100644
index 0000000..4255dbf
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeRangeSearchCursor.java
@@ -0,0 +1,214 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.impls;
+
+import java.util.Iterator;
+import java.util.ListIterator;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
+import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeRangeSearchCursor;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMIndexSearchCursor;
+
+public class LSMBTreeRangeSearchCursor extends LSMIndexSearchCursor {
+    private final ArrayTupleReference copyTuple;
+    private final RangePredicate reusablePred;
+
+    private ISearchOperationCallback searchCallback;
+    private RangePredicate predicate;
+    private IIndexAccessor memBTreeAccessor;
+    private ArrayTupleBuilder tupleBuilder;
+    private boolean proceed = true;
+
+    public LSMBTreeRangeSearchCursor(ILSMIndexOperationContext opCtx) {
+        super(opCtx);
+        this.copyTuple = new ArrayTupleReference();
+        this.reusablePred = new RangePredicate(null, null, true, true, null, null);
+    }
+
+    @Override
+    public void reset() throws HyracksDataException, IndexException {
+        super.reset();
+        proceed = true;
+    }
+
+    @Override
+    public void next() throws HyracksDataException {
+        outputElement = outputPriorityQueue.poll();
+        needPush = true;
+        proceed = false;
+    }
+
+    protected void checkPriorityQueue() throws HyracksDataException, IndexException {
+        while (!outputPriorityQueue.isEmpty() || needPush == true) {
+            if (!outputPriorityQueue.isEmpty()) {
+                PriorityQueueElement checkElement = outputPriorityQueue.peek();
+                if (proceed && !searchCallback.proceed(checkElement.getTuple())) {
+                    if (includeMemComponent) {
+                        PriorityQueueElement inMemElement = null;
+                        boolean inMemElementFound = false;
+                        // scan the PQ for the in-memory component's element
+                        Iterator<PriorityQueueElement> it = outputPriorityQueue.iterator();
+                        while (it.hasNext()) {
+                            inMemElement = it.next();
+                            if (inMemElement.getCursorIndex() == 0) {
+                                inMemElementFound = true;
+                                it.remove();
+                                break;
+                            }
+                        }
+                        if (inMemElementFound) {
+                            // copy the in-mem tuple
+                            if (tupleBuilder == null) {
+                                tupleBuilder = new ArrayTupleBuilder(cmp.getKeyFieldCount());
+                            }
+                            TupleUtils.copyTuple(tupleBuilder, inMemElement.getTuple(), cmp.getKeyFieldCount());
+                            copyTuple.reset(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray());
+
+                            // unlatch/unpin
+                            rangeCursors[0].reset();
+
+                            // reconcile
+                            if (checkElement.getCursorIndex() == 0) {
+                                searchCallback.reconcile(copyTuple);
+                            } else {
+                                searchCallback.reconcile(checkElement.getTuple());
+                            }
+                            // retraverse
+                            reusablePred.setLowKey(copyTuple, true);
+                            memBTreeAccessor.search(rangeCursors[0], reusablePred);
+                            pushIntoPriorityQueue(inMemElement);
+                            if (cmp.compare(copyTuple, inMemElement.getTuple()) != 0) {
+                                searchCallback.cancel(copyTuple);
+                                continue;
+                            }
+                        } else {
+                            // the in-memory cursor is exhausted
+                            searchCallback.reconcile(checkElement.getTuple());
+                        }
+                    } else {
+                        searchCallback.reconcile(checkElement.getTuple());
+                    }
+                }
+                // If there is no previous tuple or the previous tuple can be ignored
+                if (outputElement == null) {
+                    if (isDeleted(checkElement)) {
+                        // If the key has been deleted then pop it and set needPush to true.
+                        // We cannot push immediately because the tuple may be
+                        // modified if hasNext() is called
+                        outputElement = outputPriorityQueue.poll();
+                        searchCallback.cancel(checkElement.getTuple());
+                        needPush = true;
+                        proceed = false;
+                    } else {
+                        break;
+                    }
+                } else {
+                    // Compare the previous tuple and the head tuple in the PQ
+                    if (compare(cmp, outputElement.getTuple(), checkElement.getTuple()) == 0) {
+                        // If the previous tuple and the head tuple are
+                        // identical
+                        // then pop the head tuple and push the next tuple from
+                        // the tree of head tuple
+
+                        // the head element of PQ is useless now
+                        PriorityQueueElement e = outputPriorityQueue.poll();
+                        pushIntoPriorityQueue(e);
+                    } else {
+                        // If the previous tuple and the head tuple are different
+                        // the info of previous tuple is useless
+                        if (needPush == true) {
+                            pushIntoPriorityQueue(outputElement);
+                            needPush = false;
+                        }
+                        proceed = true;
+                        outputElement = null;
+                    }
+                }
+            } else {
+                // the priority queue is empty and needPush
+                pushIntoPriorityQueue(outputElement);
+                needPush = false;
+                outputElement = null;
+                proceed = true;
+            }
+        }
+    }
+
+    @Override
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws HyracksDataException,
+            IndexException {
+        LSMBTreeCursorInitialState lsmInitialState = (LSMBTreeCursorInitialState) initialState;
+        cmp = lsmInitialState.getOriginalKeyComparator();
+        includeMemComponent = lsmInitialState.getIncludeMemComponent();
+        operationalComponents = lsmInitialState.getOperationalComponents();
+        lsmHarness = lsmInitialState.getLSMHarness();
+        searchCallback = lsmInitialState.getSearchOperationCallback();
+        memBTreeAccessor = lsmInitialState.getMemBTreeAccessor();
+        predicate = (RangePredicate) lsmInitialState.getSearchPredicate();
+        reusablePred.setLowKeyComparator(cmp);
+        reusablePred.setHighKey(predicate.getHighKey(), predicate.isHighKeyInclusive());
+        reusablePred.setHighKeyComparator(predicate.getHighKeyComparator());
+
+        int numBTrees = lsmInitialState.getNumBTrees();
+        rangeCursors = new IIndexCursor[numBTrees];
+        for (int i = 0; i < numBTrees; i++) {
+            IBTreeLeafFrame leafFrame = (IBTreeLeafFrame) lsmInitialState.getLeafFrameFactory().createFrame();
+            rangeCursors[i] = new BTreeRangeSearchCursor(leafFrame, false);
+        }
+        setPriorityQueueComparator();
+
+        int cursorIx = 0;
+        ListIterator<ILSMComponent> btreesIter = operationalComponents.listIterator();
+        if (includeMemComponent) {
+            // Open cursor of in-memory BTree at index 0.
+            memBTreeAccessor.search(rangeCursors[cursorIx], searchPred);
+            // Skip 0 because it is the in-memory BTree.
+            ++cursorIx;
+            btreesIter.next();
+        }
+
+        // Open cursors of on-disk BTrees.
+        int numDiskComponents = includeMemComponent ? numBTrees - 1 : numBTrees;
+        ITreeIndexAccessor[] diskBTreeAccessors = new ITreeIndexAccessor[numDiskComponents];
+        int diskBTreeIx = 0;
+        while (btreesIter.hasNext()) {
+            BTree diskBTree = (BTree) ((LSMBTreeImmutableComponent) btreesIter.next()).getBTree();
+            diskBTreeAccessors[diskBTreeIx] = diskBTree.createAccessor(NoOpOperationCallback.INSTANCE,
+                    NoOpOperationCallback.INSTANCE);
+            diskBTreeAccessors[diskBTreeIx].search(rangeCursors[cursorIx], searchPred);
+            cursorIx++;
+            diskBTreeIx++;
+        }
+        initPriorityQueue();
+        proceed = true;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeSearchCursor.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeSearchCursor.java
new file mode 100644
index 0000000..6872520
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTreeSearchCursor.java
@@ -0,0 +1,132 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+
+public class LSMBTreeSearchCursor implements ITreeIndexCursor {
+
+    public enum LSMBTreeSearchType {
+        POINT,
+        RANGE
+    }
+
+    private final LSMBTreePointSearchCursor pointCursor;
+    private final LSMBTreeRangeSearchCursor rangeCursor;
+    private ITreeIndexCursor currentCursor;
+
+    public LSMBTreeSearchCursor(ILSMIndexOperationContext opCtx) {
+        pointCursor = new LSMBTreePointSearchCursor(opCtx);
+        rangeCursor = new LSMBTreeRangeSearchCursor(opCtx);
+    }
+
+    @Override
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws IndexException,
+            HyracksDataException {
+
+        LSMBTreeCursorInitialState lsmInitialState = (LSMBTreeCursorInitialState) initialState;
+
+        LSMBTreeSearchType searchType = LSMBTreeSearchType.RANGE;
+        RangePredicate btreePred = (RangePredicate) searchPred;
+        if (btreePred.getLowKey() != null && btreePred.getHighKey() != null) {
+            if (btreePred.isLowKeyInclusive() && btreePred.isHighKeyInclusive()) {
+                if (btreePred.getLowKeyComparator().getKeyFieldCount() == btreePred.getHighKeyComparator()
+                        .getKeyFieldCount()) {
+                    if (btreePred.getLowKeyComparator().getKeyFieldCount() == lsmInitialState
+                            .getOriginalKeyComparator().getKeyFieldCount()) {
+                        if (lsmInitialState.getOriginalKeyComparator().compare(btreePred.getLowKey(),
+                                btreePred.getHighKey()) == 0) {
+                            searchType = LSMBTreeSearchType.POINT;
+                        }
+                    }
+                }
+            }
+        }
+        switch (searchType) {
+            case POINT:
+                currentCursor = pointCursor;
+                break;
+            case RANGE:
+                currentCursor = rangeCursor;
+                break;
+            default:
+                throw new HyracksDataException("Wrong search type");
+        }
+        currentCursor.open(lsmInitialState, searchPred);
+    }
+
+    @Override
+    public boolean hasNext() throws HyracksDataException, IndexException {
+        return currentCursor.hasNext();
+    }
+
+    @Override
+    public void next() throws HyracksDataException {
+        currentCursor.next();
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        if (currentCursor != null) {
+            currentCursor.close();
+        }
+        currentCursor = null;
+    }
+
+    @Override
+    public void reset() throws HyracksDataException, IndexException {
+        if (currentCursor != null) {
+            currentCursor.reset();
+        }
+        currentCursor = null;
+    }
+
+    @Override
+    public ITupleReference getTuple() {
+        return currentCursor.getTuple();
+    }
+
+    @Override
+    public ICachedPage getPage() {
+        return currentCursor.getPage();
+    }
+
+    @Override
+    public void setBufferCache(IBufferCache bufferCache) {
+        currentCursor.setBufferCache(bufferCache);
+    }
+
+    @Override
+    public void setFileId(int fileId) {
+        currentCursor.setFileId(fileId);
+
+    }
+
+    @Override
+    public boolean exclusiveLatchNodes() {
+        return currentCursor.exclusiveLatchNodes();
+    }
+
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeCopyTupleWriter.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeCopyTupleWriter.java
new file mode 100644
index 0000000..2a66644
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeCopyTupleWriter.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.tuples;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+
+public class LSMBTreeCopyTupleWriter extends LSMBTreeTupleWriter {
+	public LSMBTreeCopyTupleWriter(ITypeTraits[] typeTraits, int numKeyFields){
+		// Third parameter is never used locally, just give false.
+	    super(typeTraits, numKeyFields, false);
+	}
+	
+	@Override
+    public int writeTuple(ITupleReference tuple, byte[] targetBuf, int targetOff) {
+		int tupleSize = bytesRequired(tuple);
+		byte[] buf = tuple.getFieldData(0);
+		int tupleStartOff = ((LSMBTreeTupleReference)tuple).getTupleStart();
+		System.arraycopy(buf, tupleStartOff, targetBuf, targetOff, tupleSize);
+        return tupleSize;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeCopyTupleWriterFactory.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeCopyTupleWriterFactory.java
new file mode 100644
index 0000000..b73e9af
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeCopyTupleWriterFactory.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.tuples;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleWriter;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
+
+public class LSMBTreeCopyTupleWriterFactory extends TypeAwareTupleWriterFactory {
+	private static final long serialVersionUID = 1L;
+	private final ITypeTraits[] typeTraits;
+	private final int numKeyFields;
+	
+	public LSMBTreeCopyTupleWriterFactory(ITypeTraits[] typeTraits, int numKeyFields) {
+		super(typeTraits);
+		this.typeTraits = typeTraits;
+		this.numKeyFields = numKeyFields;
+	}
+
+	@Override
+	public ITreeIndexTupleWriter createTupleWriter() {
+		return new LSMBTreeCopyTupleWriter(typeTraits, numKeyFields);
+	}
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeTupleReference.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeTupleReference.java
new file mode 100644
index 0000000..2c55792
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeTupleReference.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.tuples;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMTreeTupleReference;
+
+public class LSMBTreeTupleReference extends TypeAwareTupleReference implements ILSMTreeTupleReference {
+
+    // Indicates whether the last call to setFieldCount() was initiated by
+    // by the outside or whether it was called internally to set up an
+    // antimatter tuple.
+    private boolean resetFieldCount = false;
+    private final int numKeyFields;
+    
+    public LSMBTreeTupleReference(ITypeTraits[] typeTraits, int numKeyFields) {
+		super(typeTraits);
+		this.numKeyFields = numKeyFields;
+	}
+
+    public void setFieldCount(int fieldCount) {
+        super.setFieldCount(fieldCount);
+        // Don't change the fieldCount in reset calls.
+        resetFieldCount = false;
+    }
+
+    @Override
+    public void setFieldCount(int fieldStartIndex, int fieldCount) {
+        super.setFieldCount(fieldStartIndex, fieldCount);
+        // Don't change the fieldCount in reset calls.
+        resetFieldCount = false;
+    }
+    
+    @Override
+    public void resetByTupleOffset(ByteBuffer buf, int tupleStartOff) {
+        this.buf = buf;
+        this.tupleStartOff = tupleStartOff;
+        if (numKeyFields != typeTraits.length) {
+            if (isAntimatter()) {
+                setFieldCount(numKeyFields);
+                // Reset the original field count for matter tuples.
+                resetFieldCount = true;
+            } else {
+                if (resetFieldCount) {
+                    setFieldCount(typeTraits.length);
+                }
+            }
+        }
+        super.resetByTupleOffset(buf, tupleStartOff);
+    }
+    
+    @Override
+    public void resetByTupleIndex(ITreeIndexFrame frame, int tupleIndex) {
+        resetByTupleOffset(frame.getBuffer(), frame.getTupleOffset(tupleIndex));
+    }
+    
+	@Override
+	protected int getNullFlagsBytes() {
+		// +1.0 is for matter/antimatter bit.
+		return (int) Math.ceil((fieldCount + 1.0) / 8.0);
+    }
+
+	@Override
+	public boolean isAntimatter() {
+	      // Check if the leftmost bit is 0 or 1.
+		final byte mask = (byte) (1 << 7);
+		if ((buf.array()[tupleStartOff] & mask) != 0) {
+		    return true;
+		}
+		return false;
+	}
+	
+    public int getTupleStart() {
+    	return tupleStartOff;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeTupleWriter.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeTupleWriter.java
new file mode 100644
index 0000000..12aca6f
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeTupleWriter.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.tuples;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriter;
+
+public class LSMBTreeTupleWriter extends TypeAwareTupleWriter {
+    private final boolean isAntimatter;
+    private final int numKeyFields;
+
+    public LSMBTreeTupleWriter(ITypeTraits[] typeTraits, int numKeyFields, boolean isAntimatter) {
+        super(typeTraits);
+        this.numKeyFields = numKeyFields;
+        this.isAntimatter = isAntimatter;
+    }
+
+    @Override
+    public int bytesRequired(ITupleReference tuple) {
+        if (isAntimatter) {
+            // Only requires space for the key fields.
+            return super.bytesRequired(tuple, 0, numKeyFields);
+        } else {
+            return super.bytesRequired(tuple);
+        }
+    }
+
+    @Override
+    public int getCopySpaceRequired(ITupleReference tuple) {
+        return super.bytesRequired(tuple);
+    }
+
+    @Override
+    public ITreeIndexTupleReference createTupleReference() {
+        return new LSMBTreeTupleReference(typeTraits, numKeyFields);
+    }
+
+    @Override
+    protected int getNullFlagsBytes(int numFields) {
+        // +1.0 is for matter/antimatter bit.
+        return (int) Math.ceil(((double) numFields + 1.0) / 8.0);
+    }
+
+    @Override
+    protected int getNullFlagsBytes(ITupleReference tuple) {
+        // +1.0 is for matter/antimatter bit.
+        return (int) Math.ceil(((double) tuple.getFieldCount() + 1.0) / 8.0);
+    }
+
+    @Override
+    public int writeTuple(ITupleReference tuple, byte[] targetBuf, int targetOff) {
+        int bytesWritten = -1;
+        if (isAntimatter) {
+            bytesWritten = super.writeTupleFields(tuple, 0, numKeyFields, targetBuf, targetOff);
+            setAntimatterBit(targetBuf, targetOff);
+        } else {
+            bytesWritten = super.writeTuple(tuple, targetBuf, targetOff);
+        }
+        return bytesWritten;
+    }
+
+    private void setAntimatterBit(byte[] targetBuf, int targetOff) {
+        // Set leftmost bit to 1.
+        targetBuf[targetOff] = (byte) (targetBuf[targetOff] | (1 << 7));
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeTupleWriterFactory.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeTupleWriterFactory.java
new file mode 100644
index 0000000..8eb24a0
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeTupleWriterFactory.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.tuples;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleWriter;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
+
+public class LSMBTreeTupleWriterFactory extends TypeAwareTupleWriterFactory {
+
+	private static final long serialVersionUID = 1L;
+	private final ITypeTraits[] typeTraits;
+	private final int numKeyFields;
+	private final boolean isDelete;
+	
+	public LSMBTreeTupleWriterFactory(ITypeTraits[] typeTraits, int numKeyFields, boolean isDelete) {
+		super(typeTraits);
+		this.typeTraits = typeTraits;
+		this.numKeyFields = numKeyFields;
+		this.isDelete = isDelete;
+	}
+
+	@Override
+	public ITreeIndexTupleWriter createTupleWriter() {
+		return new LSMBTreeTupleWriter(typeTraits, numKeyFields, isDelete);
+	}
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/util/LSMBTreeUtils.java b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/util/LSMBTreeUtils.java
new file mode 100644
index 0000000..ac20b6d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/util/LSMBTreeUtils.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.util;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilterFactory;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMInteriorFrameFactory;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMLeafFrameFactory;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManagerFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.freepage.LinkedListFreePageManagerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.impls.LSMBTree;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.impls.LSMBTreeFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.tuples.LSMBTreeCopyTupleWriterFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.tuples.LSMBTreeTupleWriterFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BTreeFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class LSMBTreeUtils {
+
+    public static LSMBTree createLSMTree(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IIOManager ioManager, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] cmpFactories, int[] bloomFilterKeyFields, ILSMMergePolicy mergePolicy,
+            ILSMOperationTrackerFactory opTrackerFactory, ILSMIOOperationScheduler ioScheduler,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
+        return createLSMTree(memBufferCache, memFreePageManager, ioManager, file, diskBufferCache, diskFileMapProvider,
+                typeTraits, cmpFactories, bloomFilterKeyFields, mergePolicy, opTrackerFactory, ioScheduler,
+                ioOpCallbackProvider, 0);
+    }
+
+    public static LSMBTree createLSMTree(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IIOManager ioManager, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] cmpFactories, int[] bloomFilterKeyFields, ILSMMergePolicy mergePolicy,
+            ILSMOperationTrackerFactory opTrackerFactory, ILSMIOOperationScheduler ioScheduler,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider, int startIODeviceIndex) {
+        LSMBTreeTupleWriterFactory insertTupleWriterFactory = new LSMBTreeTupleWriterFactory(typeTraits,
+                cmpFactories.length, false);
+        LSMBTreeTupleWriterFactory deleteTupleWriterFactory = new LSMBTreeTupleWriterFactory(typeTraits,
+                cmpFactories.length, true);
+        LSMBTreeCopyTupleWriterFactory copyTupleWriterFactory = new LSMBTreeCopyTupleWriterFactory(typeTraits,
+                cmpFactories.length);
+        ITreeIndexFrameFactory insertLeafFrameFactory = new BTreeNSMLeafFrameFactory(insertTupleWriterFactory);
+        ITreeIndexFrameFactory copyTupleLeafFrameFactory = new BTreeNSMLeafFrameFactory(copyTupleWriterFactory);
+        ITreeIndexFrameFactory deleteLeafFrameFactory = new BTreeNSMLeafFrameFactory(deleteTupleWriterFactory);
+        ITreeIndexFrameFactory interiorFrameFactory = new BTreeNSMInteriorFrameFactory(insertTupleWriterFactory);
+        ITreeIndexMetaDataFrameFactory metaFrameFactory = new LIFOMetaDataFrameFactory();
+        IFreePageManagerFactory freePageManagerFactory = new LinkedListFreePageManagerFactory(diskBufferCache,
+                metaFrameFactory);
+
+        TreeIndexFactory<BTree> diskBTreeFactory = new BTreeFactory(diskBufferCache, diskFileMapProvider,
+                freePageManagerFactory, interiorFrameFactory, copyTupleLeafFrameFactory, cmpFactories,
+                typeTraits.length);
+        TreeIndexFactory<BTree> bulkLoadBTreeFactory = new BTreeFactory(diskBufferCache, diskFileMapProvider,
+                freePageManagerFactory, interiorFrameFactory, insertLeafFrameFactory, cmpFactories, typeTraits.length);
+
+        BloomFilterFactory bloomFilterFactory = new BloomFilterFactory(diskBufferCache, diskFileMapProvider,
+                bloomFilterKeyFields);
+
+        ILSMIndexFileManager fileNameManager = new LSMBTreeFileManager(ioManager, diskFileMapProvider, file,
+                diskBTreeFactory, startIODeviceIndex);
+
+        LSMBTree lsmTree = new LSMBTree(memBufferCache, memFreePageManager, interiorFrameFactory,
+                insertLeafFrameFactory, deleteLeafFrameFactory, fileNameManager, diskBTreeFactory,
+                bulkLoadBTreeFactory, bloomFilterFactory, diskFileMapProvider, typeTraits.length, cmpFactories,
+                mergePolicy, opTrackerFactory, ioScheduler, ioOpCallbackProvider);
+        return lsmTree;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/pom.xml b/hyracks/hyracks-storage-am-lsm-common/pom.xml
new file mode 100644
index 0000000..e4d2040
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/pom.xml
@@ -0,0 +1,47 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <artifactId>hyracks-storage-am-lsm-common</artifactId>
+
+  <parent>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks</artifactId>
+    <version>0.2.5-SNAPSHOT</version>
+  </parent>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.0.2</version>
+        <configuration>
+          <source>1.7</source>
+          <target>1.7</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-common</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-bloomfilter</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-btree</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>  	
+  </dependencies>
+</project>
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/IInMemoryBufferCache.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/IInMemoryBufferCache.java
new file mode 100644
index 0000000..082ad2f
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/IInMemoryBufferCache.java
@@ -0,0 +1,7 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCacheInternal;
+
+public interface IInMemoryBufferCache extends IBufferCacheInternal {
+    public void open();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMComponent.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMComponent.java
new file mode 100644
index 0000000..fa00f85
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMComponent.java
@@ -0,0 +1,10 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMOperationType;
+
+public interface ILSMComponent {
+    public boolean threadEnter(LSMOperationType opType) throws InterruptedException;
+
+    public void threadExit(LSMOperationType opType, boolean failedOperation) throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMComponentFactory.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMComponentFactory.java
new file mode 100644
index 0000000..1f3a2b7
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMComponentFactory.java
@@ -0,0 +1,13 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+
+public interface ILSMComponentFactory {
+    public ILSMComponent createLSMComponentInstance(LSMComponentFileReferences cfr) throws IndexException,
+            HyracksDataException;
+
+    public IBufferCache getBufferCache();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMHarness.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMHarness.java
new file mode 100644
index 0000000..04d7fa3
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMHarness.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+
+public interface ILSMHarness {
+
+    public void forceModify(ILSMIndexOperationContext ctx, ITupleReference tuple) throws HyracksDataException,
+            IndexException;
+
+    public boolean modify(ILSMIndexOperationContext ctx, boolean tryOperation, ITupleReference tuple)
+            throws HyracksDataException, IndexException;
+
+    public void noOp(ILSMIndexOperationContext ctx) throws HyracksDataException;
+
+    public void search(ILSMIndexOperationContext ctx, IIndexCursor cursor, ISearchPredicate pred)
+            throws HyracksDataException, IndexException;
+
+    public void endSearch(ILSMIndexOperationContext ctx) throws HyracksDataException;
+
+    public void scheduleMerge(ILSMIndexOperationContext ctx, ILSMIOOperationCallback callback)
+            throws HyracksDataException, IndexException;
+
+    public void merge(ILSMIndexOperationContext ctx, ILSMIOOperation operation) throws HyracksDataException,
+            IndexException;
+
+    public void scheduleFlush(ILSMIndexOperationContext ctx, ILSMIOOperationCallback callback)
+            throws HyracksDataException;
+
+    public void flush(ILSMIndexOperationContext ctx, ILSMIOOperation operation) throws HyracksDataException,
+            IndexException;
+
+    public void addBulkLoadedComponent(ILSMComponent index) throws HyracksDataException, IndexException;
+
+    public ILSMOperationTracker getOperationTracker();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperation.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperation.java
new file mode 100644
index 0000000..15fdc6e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperation.java
@@ -0,0 +1,17 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import java.util.Set;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+
+public interface ILSMIOOperation {
+    public Set<IODeviceHandle> getReadDevices();
+
+    public Set<IODeviceHandle> getWriteDevices();
+
+    public void perform() throws HyracksDataException, IndexException;
+
+    public ILSMIOOperationCallback getCallback();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationCallback.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationCallback.java
new file mode 100644
index 0000000..bf12583
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationCallback.java
@@ -0,0 +1,14 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public interface ILSMIOOperationCallback {
+    public void beforeOperation() throws HyracksDataException;
+
+    public void afterOperation(List<ILSMComponent> oldComponents, ILSMComponent newComponent)
+            throws HyracksDataException;
+
+    public void afterFinalize(ILSMComponent newComponent) throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationCallbackFactory.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationCallbackFactory.java
new file mode 100644
index 0000000..52361ee
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationCallbackFactory.java
@@ -0,0 +1,7 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import java.io.Serializable;
+
+public interface ILSMIOOperationCallbackFactory extends Serializable {
+    public ILSMIOOperationCallback createIOOperationCallback(Object syncObj);
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationCallbackProvider.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationCallbackProvider.java
new file mode 100644
index 0000000..b5c9741
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationCallbackProvider.java
@@ -0,0 +1,5 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+public interface ILSMIOOperationCallbackProvider {
+    public ILSMIOOperationCallback getIOOperationCallback(ILSMIndex index);
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationScheduler.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationScheduler.java
new file mode 100644
index 0000000..6d96562
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationScheduler.java
@@ -0,0 +1,7 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public interface ILSMIOOperationScheduler {
+    public void scheduleOperation(ILSMIOOperation operation) throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationSchedulerProvider.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationSchedulerProvider.java
new file mode 100644
index 0000000..9737728
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIOOperationSchedulerProvider.java
@@ -0,0 +1,9 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import java.io.Serializable;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+
+public interface ILSMIOOperationSchedulerProvider extends Serializable {
+    public ILSMIOOperationScheduler getIOScheduler(IHyracksTaskContext ctx);
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndex.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndex.java
new file mode 100644
index 0000000..e8c09c0
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndex.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMHarness;
+
+/**
+ * Methods to be implemented by an LSM index, which are called from {@link LSMHarness}.
+ * The implementations of the methods below should be thread agnostic.
+ * Synchronization of LSM operations like updates/searches/flushes/merges are
+ * done by the {@link LSMHarness}. For example, a flush() implementation should only
+ * create and return the new on-disk component, ignoring the fact that
+ * concurrent searches/updates/merges may be ongoing.
+ */
+public interface ILSMIndex extends IIndex {
+    
+    public void deactivate(boolean flushOnExit) throws HyracksDataException;
+
+    public ILSMIndexAccessor createAccessor(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback);
+
+    public boolean getFlushStatus();
+
+    public ILSMOperationTracker getOperationTracker();
+
+    public ILSMIOOperationScheduler getIOScheduler();
+
+    public List<ILSMComponent> getImmutableComponents();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexAccessor.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexAccessor.java
new file mode 100644
index 0000000..a85c24b
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexAccessor.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+
+/**
+ * Client handle for performing operations
+ * (insert/delete/update/search/diskorderscan/merge/flush) on an {@link ILSMHarness}.
+ * An {@link ILSMIndexAccessor} is not thread safe, but different {@link ILSMIndexAccessor}s
+ * can concurrently operate on the same {@link ILSMIndex} (i.e., the {@link ILSMIndex} must allow
+ * concurrent operations).
+ */
+public interface ILSMIndexAccessor extends IIndexAccessor {
+    public void scheduleFlush(ILSMIOOperationCallback callback) throws HyracksDataException;
+
+    public void scheduleMerge(ILSMIOOperationCallback callback) throws HyracksDataException, IndexException;
+
+    /**
+     * Deletes the tuple from the memory component only.
+     * 
+     * @throws HyracksDataException
+     * @throws IndexException
+     */
+    public void physicalDelete(ITupleReference tuple) throws HyracksDataException, IndexException;
+
+    /**
+     * Attempts to insert the given tuple.
+     * If the insert would have to wait for a flush to complete, then this method returns false to
+     * allow the caller to avoid potential deadlock situations.
+     * Otherwise, returns true (insert was successful).
+     * 
+     * @param tuple
+     *            Tuple to be inserted.
+     * @throws HyracksDataException
+     *             If the BufferCache throws while un/pinning or un/latching.
+     * @throws IndexException
+     *             If an index-specific constraint is violated, e.g., the key
+     *             already exists.
+     */
+    public boolean tryInsert(ITupleReference tuple) throws HyracksDataException, IndexException;
+
+    /**
+     * Attempts to delete the given tuple.
+     * If the delete would have to wait for a flush to complete, then this method returns false to
+     * allow the caller to avoid potential deadlock situations.
+     * Otherwise, returns true (delete was successful).
+     * 
+     * @param tuple
+     *            Tuple to be deleted.
+     * @throws HyracksDataException
+     *             If the BufferCache throws while un/pinning or un/latching.
+     * @throws IndexException
+     *             If there is no matching tuple in the index.
+     */
+    public boolean tryDelete(ITupleReference tuple) throws HyracksDataException, IndexException;
+
+    /**
+     * Attempts to update the given tuple.
+     * If the update would have to wait for a flush to complete, then this method returns false to
+     * allow the caller to avoid potential deadlock situations.
+     * Otherwise, returns true (update was successful).
+     * 
+     * @param tuple
+     *            Tuple whose match in the index is to be update with the given
+     *            tuples contents.
+     * @throws HyracksDataException
+     *             If the BufferCache throws while un/pinning or un/latching.
+     * @throws IndexException
+     *             If there is no matching tuple in the index.
+     */
+    public boolean tryUpdate(ITupleReference tuple) throws HyracksDataException, IndexException;
+
+    /**
+     * This operation is only supported by indexes with the notion of a unique key.
+     * If tuple's key already exists, then this operation attempts to performs an update.
+     * Otherwise, it attempts to perform an insert.
+     * If the operation would have to wait for a flush to complete, then this method returns false to
+     * allow the caller to avoid potential deadlock situations.
+     * Otherwise, returns true (insert/update was successful).
+     * 
+     * @param tuple
+     *            Tuple to be deleted.
+     * @throws HyracksDataException
+     *             If the BufferCache throws while un/pinning or un/latching.
+     * @throws IndexException
+     *             If there is no matching tuple in the index.
+     */
+    public boolean tryUpsert(ITupleReference tuple) throws HyracksDataException, IndexException;
+
+    public void forcePhysicalDelete(ITupleReference tuple) throws HyracksDataException, IndexException;
+
+    public void forceInsert(ITupleReference tuple) throws HyracksDataException, IndexException;
+
+    public void forceDelete(ITupleReference tuple) throws HyracksDataException, IndexException;
+
+    /**
+     * This method can be used to increase the number of 'active' operations of an index artificially,
+     * without actually modifying the index.
+     * This method does not block and is guaranteed to trigger the {@link ILSMOperationTracker}'s beforeOperation
+     * and afterOperation calls.
+     * 
+     * @throws HyracksDataException
+     */
+    public void noOp() throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexAccessorInternal.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexAccessorInternal.java
new file mode 100644
index 0000000..8c28d47
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexAccessorInternal.java
@@ -0,0 +1,24 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+
+public interface ILSMIndexAccessorInternal extends ILSMIndexAccessor {
+
+    /**
+     * Force a flush of the in-memory component.
+     * 
+     * @throws HyracksDataException
+     * @throws TreeIndexException
+     */
+    public void flush(ILSMIOOperation operation) throws HyracksDataException, IndexException;
+
+    /**
+     * Merge all on-disk components.
+     * 
+     * @throws HyracksDataException
+     * @throws TreeIndexException
+     */
+    public void merge(ILSMIOOperation operation) throws HyracksDataException, IndexException;
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexFileManager.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexFileManager.java
new file mode 100644
index 0000000..bc922fe
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexFileManager.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import java.util.Comparator;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+
+/**
+ * Provides file names for LSM on-disk components. Also cleans up invalid files.
+ * There are separate methods to get file names for merge and flush because we
+ * need to guarantee the correct order of on-disk components (i.e., the
+ * components produced by flush are always newer than those produced by a
+ * merge).
+ */
+public interface ILSMIndexFileManager {
+    public void createDirs();
+
+    public void deleteDirs();
+
+    public LSMComponentFileReferences getRelFlushFileReference();
+
+    public LSMComponentFileReferences getRelMergeFileReference(String firstFileName, String lastFileName)
+            throws HyracksDataException;
+
+    public String getBaseDir();
+
+    // Deletes invalid files, and returns list of valid files from baseDir.
+    // The returned valid files are correctly sorted (based on the recency of data). 
+    public List<LSMComponentFileReferences> cleanupAndGetValidFiles() throws HyracksDataException, IndexException;
+
+    public Comparator<String> getFileNameComparator();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexInternal.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexInternal.java
new file mode 100644
index 0000000..f2c052b
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexInternal.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+
+public interface ILSMIndexInternal extends ILSMIndex {
+    public ILSMIndexAccessorInternal createAccessor(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback);
+
+    public void modify(IIndexOperationContext ictx, ITupleReference tuple) throws HyracksDataException, IndexException;
+
+    public void search(ILSMIndexOperationContext ictx, IIndexCursor cursor, ISearchPredicate pred)
+            throws HyracksDataException, IndexException;
+
+    public boolean scheduleFlush(ILSMIndexOperationContext ctx, ILSMIOOperationCallback callback)
+            throws HyracksDataException;
+
+    public ILSMComponent flush(ILSMIOOperation operation) throws HyracksDataException, IndexException;
+
+    public void scheduleMerge(ILSMIndexOperationContext ctx, ILSMIOOperationCallback callback)
+            throws HyracksDataException, IndexException;
+
+    public ILSMComponent merge(List<ILSMComponent> mergedComponents, ILSMIOOperation operation)
+            throws HyracksDataException, IndexException;
+
+    public void addComponent(ILSMComponent index);
+
+    public void subsumeMergedComponents(ILSMComponent newComponent, List<ILSMComponent> mergedComponents);
+
+    /**
+     * Populates the context's component holder with a snapshot of the components involved in the operation.
+     * 
+     * @param ctx
+     *            - the operation's context
+     */
+    public void getOperationalComponents(ILSMIndexOperationContext ctx);
+
+    public IInMemoryFreePageManager getInMemoryFreePageManager();
+
+    public List<ILSMComponent> getImmutableComponents();
+
+    public void markAsValid(ILSMComponent lsmComponent) throws HyracksDataException;
+
+    public void setFlushStatus(boolean needsFlush);
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexOperationContext.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexOperationContext.java
new file mode 100644
index 0000000..864d0e7
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMIndexOperationContext.java
@@ -0,0 +1,15 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import java.util.List;
+
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+
+public interface ILSMIndexOperationContext extends IIndexOperationContext {
+    public List<ILSMComponent> getComponentHolder();
+
+    public ISearchOperationCallback getSearchOperationCallback();
+
+    public IModificationOperationCallback getModificationCallback();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMMergePolicy.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMMergePolicy.java
new file mode 100644
index 0000000..877c6ff
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMMergePolicy.java
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+
+public interface ILSMMergePolicy {
+    public void diskComponentAdded(ILSMIndex index, int totalNumDiskComponents) throws HyracksDataException, IndexException;
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMMergePolicyProvider.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMMergePolicyProvider.java
new file mode 100644
index 0000000..57a9609
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMMergePolicyProvider.java
@@ -0,0 +1,9 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import java.io.Serializable;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+
+public interface ILSMMergePolicyProvider extends Serializable {
+    public ILSMMergePolicy getMergePolicy(IHyracksTaskContext ctx);
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMOperationTracker.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMOperationTracker.java
new file mode 100644
index 0000000..c3f1f3e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMOperationTracker.java
@@ -0,0 +1,44 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMOperationType;
+
+/**
+ * This interface exposes methods for tracking and setting the status of operations for the purpose
+ * of coordinating flushes/merges in {@link ILSMIndex}.
+ * Note that 'operation' below refers to {@link IIndexAccessor} methods.
+ * 
+ * @author zheilbron
+ */
+public interface ILSMOperationTracker {
+
+    /**
+     * An {@link ILSMIndex} will call this method before an operation enters it,
+     * i.e., before any latches are taken.
+     * If tryOperation is true, and the operation would have to wait for a flush,
+     * then this method does not block and returns false.
+     * Otherwise, this method returns true, and the operation is considered 'active' in the index.
+     */
+    public void beforeOperation(LSMOperationType opType, ISearchOperationCallback searchCallback,
+            IModificationOperationCallback modificationCallback) throws HyracksDataException;
+
+    /**
+     * An {@link ILSMIndex} will call this method after an operation has left the index,
+     * i.e., after all relevant latches have been released.
+     * After this method has been called, the operation is still considered 'active',
+     * until the issuer of the operation declares it completed by calling completeOperation().
+     */
+    public void afterOperation(LSMOperationType opType, ISearchOperationCallback searchCallback,
+            IModificationOperationCallback modificationCallback) throws HyracksDataException;
+
+    /**
+     * This method must be called by whoever is requesting the index operation through an {@link IIndexAccessor}.
+     * The use of this method indicates that the operation is no longer 'active'
+     * for the purpose of coordinating flushes/merges.
+     */
+    public void completeOperation(LSMOperationType opType, ISearchOperationCallback searchCallback,
+            IModificationOperationCallback modificationCallback) throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMOperationTrackerFactory.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMOperationTrackerFactory.java
new file mode 100644
index 0000000..db7ff6c
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMOperationTrackerFactory.java
@@ -0,0 +1,7 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import java.io.Serializable;
+
+public interface ILSMOperationTrackerFactory extends Serializable {
+    public ILSMOperationTracker createOperationTracker(ILSMIndex index);
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMTreeTupleReference.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMTreeTupleReference.java
new file mode 100644
index 0000000..8d82673
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/api/ILSMTreeTupleReference.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.api;
+
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
+
+public interface ILSMTreeTupleReference extends ITreeIndexTupleReference {
+    public boolean isAntimatter();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/dataflow/AbstractLSMIndexDataflowHelper.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/dataflow/AbstractLSMIndexDataflowHelper.java
new file mode 100644
index 0000000..ea7c3b4
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/dataflow/AbstractLSMIndexDataflowHelper.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+
+public abstract class AbstractLSMIndexDataflowHelper extends IndexDataflowHelper {
+
+    protected static int DEFAULT_MEM_PAGE_SIZE = 32768;
+    protected static int DEFAULT_MEM_NUM_PAGES = 1000;
+
+    protected final int memPageSize;
+    protected final int memNumPages;
+
+    protected final ILSMMergePolicy mergePolicy;
+    protected final ILSMIOOperationScheduler ioScheduler;
+    protected final ILSMOperationTrackerFactory opTrackerFactory;
+    protected final ILSMIOOperationCallbackProvider ioOpCallbackProvider;
+
+    public AbstractLSMIndexDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
+        this(opDesc, ctx, partition, DEFAULT_MEM_PAGE_SIZE, DEFAULT_MEM_NUM_PAGES, mergePolicy, opTrackerFactory,
+                ioScheduler, ioOpCallbackProvider);
+    }
+
+    public AbstractLSMIndexDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition,
+            int memPageSize, int memNumPages, ILSMMergePolicy mergePolicy,
+            ILSMOperationTrackerFactory opTrackerFactory, ILSMIOOperationScheduler ioScheduler,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
+        super(opDesc, ctx, partition);
+        this.memPageSize = memPageSize;
+        this.memNumPages = memNumPages;
+        this.mergePolicy = mergePolicy;
+        this.opTrackerFactory = opTrackerFactory;
+        this.ioScheduler = ioScheduler;
+        this.ioOpCallbackProvider = ioOpCallbackProvider;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/dataflow/AbstractLSMIndexDataflowHelperFactory.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/dataflow/AbstractLSMIndexDataflowHelperFactory.java
new file mode 100644
index 0000000..a2f2a11
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/dataflow/AbstractLSMIndexDataflowHelperFactory.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.dataflow;
+
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationSchedulerProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicyProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+
+public abstract class AbstractLSMIndexDataflowHelperFactory implements IIndexDataflowHelperFactory {
+    protected static final long serialVersionUID = 1L;
+
+    protected final ILSMMergePolicyProvider mergePolicyProvider;
+    protected final ILSMOperationTrackerFactory opTrackerFactory;
+    protected final ILSMIOOperationSchedulerProvider ioSchedulerProvider;
+    protected final ILSMIOOperationCallbackProvider ioOpCallbackProvider;
+    protected final int memPageSize;
+    protected final int memNumPages;
+
+    public AbstractLSMIndexDataflowHelperFactory(ILSMMergePolicyProvider mergePolicyProvider,
+            ILSMOperationTrackerFactory opTrackerFactory, ILSMIOOperationSchedulerProvider ioSchedulerProvider,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider, int memPageSize, int memNumPages) {
+        this.mergePolicyProvider = mergePolicyProvider;
+        this.opTrackerFactory = opTrackerFactory;
+        this.ioSchedulerProvider = ioSchedulerProvider;
+        this.ioOpCallbackProvider = ioOpCallbackProvider;
+        this.memPageSize = memPageSize;
+        this.memNumPages = memNumPages;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/dataflow/LSMIndexInsertUpdateDeleteOperatorNodePushable.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/dataflow/LSMIndexInsertUpdateDeleteOperatorNodePushable.java
new file mode 100644
index 0000000..baa9648
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/dataflow/LSMIndexInsertUpdateDeleteOperatorNodePushable.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.lsm.common.dataflow;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
+import edu.uci.ics.hyracks.dataflow.common.comm.util.FrameUtils;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexInsertUpdateDeleteOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
+
+public class LSMIndexInsertUpdateDeleteOperatorNodePushable extends IndexInsertUpdateDeleteOperatorNodePushable {
+
+    protected FrameTupleAppender appender;
+
+    public LSMIndexInsertUpdateDeleteOperatorNodePushable(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
+            int partition, int[] fieldPermutation, IRecordDescriptorProvider recordDescProvider, IndexOperation op) {
+        super(opDesc, ctx, partition, fieldPermutation, recordDescProvider, op);
+    }
+
+    @Override
+    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+        accessor.reset(buffer);
+        ILSMIndexAccessor lsmAccessor = (ILSMIndexAccessor) indexAccessor;
+        int lastFlushedTupleIndex = 0;
+        int tupleCount = accessor.getTupleCount();
+        for (int i = 0; i < tupleCount; i++) {
+            try {
+                if (tupleFilter != null) {
+                    frameTuple.reset(accessor, i);
+                    if (!tupleFilter.accept(frameTuple)) {
+                        lsmAccessor.noOp();
+                        continue;
+                    }
+                }
+                tuple.reset(accessor, i);
+
+                switch (op) {
+                    case INSERT: {
+                        if (!lsmAccessor.tryInsert(tuple)) {
+                            flushPartialFrame(lastFlushedTupleIndex, i);
+                            lastFlushedTupleIndex = (i == 0) ? 0 : i - 1;
+                            lsmAccessor.insert(tuple);
+                        }
+                        break;
+                    }
+                    case DELETE: {
+                        if (!lsmAccessor.tryDelete(tuple)) {
+                            flushPartialFrame(lastFlushedTupleIndex, i);
+                            lastFlushedTupleIndex = (i == 0) ? 0 : i - 1;
+                            lsmAccessor.delete(tuple);
+                        }
+                        break;
+                    }
+                    case UPSERT: {
+                        if (!lsmAccessor.tryUpsert(tuple)) {
+                            flushPartialFrame(lastFlushedTupleIndex, i);
+                            lastFlushedTupleIndex = (i == 0) ? 0 : i - 1;
+                            lsmAccessor.upsert(tuple);
+                        }
+                        break;
+                    }
+                    case UPDATE: {
+                        if (!lsmAccessor.tryUpdate(tuple)) {
+                            flushPartialFrame(lastFlushedTupleIndex, i);
+                            lastFlushedTupleIndex = (i == 0) ? 0 : i - 1;
+                            lsmAccessor.update(tuple);
+                        }
+                        break;
+                    }
+                    default: {
+                        throw new HyracksDataException("Unsupported operation " + op
+                                + " in tree index InsertUpdateDelete operator");
+                    }
+                }
+            } catch (HyracksDataException e) {
+                throw e;
+            } catch (Exception e) {
+                throw new HyracksDataException(e);
+            }
+        }
+        if (lastFlushedTupleIndex == 0) {
+            // No partial flushing was necessary. Forward entire frame.
+            System.arraycopy(buffer.array(), 0, writeBuffer.array(), 0, buffer.capacity());
+            FrameUtils.flushFrame(writeBuffer, writer);
+        } else {
+            // Flush remaining partial frame.
+            flushPartialFrame(lastFlushedTupleIndex, tupleCount);
+        }
+    }
+
+    private void flushPartialFrame(int startTupleIndex, int endTupleIndex) throws HyracksDataException {
+        if (appender == null) {
+            appender = new FrameTupleAppender(ctx.getFrameSize());
+        }
+        appender.reset(writeBuffer, true);
+        for (int i = startTupleIndex; i < endTupleIndex; i++) {
+            if (!appender.append(accessor, i)) {
+                throw new IllegalStateException("Failed to append tuple into frame.");
+            }
+        }
+        FrameUtils.flushFrame(writeBuffer, writer);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/dataflow/LSMTreeIndexInsertUpdateDeleteOperatorDescriptor.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/dataflow/LSMTreeIndexInsertUpdateDeleteOperatorDescriptor.java
new file mode 100644
index 0000000..6297576
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/dataflow/LSMTreeIndexInsertUpdateDeleteOperatorDescriptor.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
+
+public class LSMTreeIndexInsertUpdateDeleteOperatorDescriptor extends AbstractTreeIndexOperatorDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    private final int[] fieldPermutation;
+    private final IndexOperation op;
+
+    public LSMTreeIndexInsertUpdateDeleteOperatorDescriptor(IOperatorDescriptorRegistry spec, RecordDescriptor recDesc,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lifecycleManagerProvider,
+            IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] comparatorFactories, int[] bloomFilterKeyFields, int[] fieldPermutation,
+            IndexOperation op, IIndexDataflowHelperFactory dataflowHelperFactory,
+            ITupleFilterFactory tupleFilterFactory, IModificationOperationCallbackFactory modificationOpCallbackProvider) {
+        super(spec, 1, 1, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, bloomFilterKeyFields, dataflowHelperFactory, tupleFilterFactory, false,
+                NoOpLocalResourceFactoryProvider.INSTANCE, NoOpOperationCallbackFactory.INSTANCE,
+                modificationOpCallbackProvider);
+        this.fieldPermutation = fieldPermutation;
+        this.op = op;
+    }
+
+    @Override
+    public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
+            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
+        return new LSMIndexInsertUpdateDeleteOperatorNodePushable(this, ctx, partition, fieldPermutation,
+                recordDescProvider, op);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/freepage/DualIndexInMemoryBufferCache.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/freepage/DualIndexInMemoryBufferCache.java
new file mode 100644
index 0000000..c24c473
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/freepage/DualIndexInMemoryBufferCache.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.freepage;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.storage.common.buffercache.ICacheMemoryAllocator;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+import edu.uci.ics.hyracks.storage.common.file.TransientFileMapManager;
+
+/**
+ * In-memory buffer cache that supports two tree indexes.
+ * We assume that the tree indexes have 2 fixed pages, one at index 0 (metadata page), and one at index 1 (root page).
+ */
+public class DualIndexInMemoryBufferCache extends InMemoryBufferCache {
+
+    public DualIndexInMemoryBufferCache(ICacheMemoryAllocator allocator, int pageSize, int numPages) {
+        super(allocator, pageSize, numPages, new TransientFileMapManager());
+    }
+
+    @Override
+    public ICachedPage pin(long dpid, boolean newPage) {
+        int pageId = BufferedFileHandle.getPageId(dpid);
+        int fileId = BufferedFileHandle.getFileId(dpid);
+        if (pageId < pages.length) {
+            // Common case: Return regular page.
+            if (pageId == 0 || pageId == 1) {
+                return pages[pageId + 2 * fileId];
+            } else {
+                return pages[pageId];
+            }
+        } else {
+            // Rare case: Return overflow page, possibly expanding overflow
+            // array.
+            synchronized (overflowPages) {
+                int numNewPages = pageId - pages.length - overflowPages.size() + 1;
+                if (numNewPages > 0) {
+                    ByteBuffer[] buffers = allocator.allocate(pageSize, numNewPages);
+                    for (int i = 0; i < numNewPages; i++) {
+                        CachedPage overflowPage = new CachedPage(pages.length + overflowPages.size(), buffers[i]);
+                        overflowPages.add(overflowPage);
+                    }
+                }
+                return overflowPages.get(pageId - pages.length);
+            }
+        }
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/freepage/DualIndexInMemoryFreePageManager.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/freepage/DualIndexInMemoryFreePageManager.java
new file mode 100644
index 0000000..7a2be7f
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/freepage/DualIndexInMemoryFreePageManager.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.freepage;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrame;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
+
+/**
+ * In-memory free page manager that supports two tree indexes.
+ * We assume that the tree indexes have 2 fixed pages, one at index 0 (metadata page), and one at index 1 (root page).
+ */
+public class DualIndexInMemoryFreePageManager extends InMemoryFreePageManager {
+
+    public DualIndexInMemoryFreePageManager(int capacity, ITreeIndexMetaDataFrameFactory metaDataFrameFactory) {
+        super(capacity, metaDataFrameFactory);
+        // We start the currentPageId from 3, because the RTree uses
+        // the first page as metadata page, and the second page as root page.
+        // And the BTree uses the third page as metadata, and the third page as root page 
+        // (when returning free pages we first increment, then get)
+        currentPageId.set(3);
+    }
+
+    @Override
+    public void init(ITreeIndexMetaDataFrame metaFrame, int currentMaxPage) throws HyracksDataException {
+        currentPageId.set(3);
+    }
+
+    public int getCapacity() {
+        return capacity - 4;
+    }
+
+    public void reset() {
+        currentPageId.set(3);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/freepage/InMemoryBufferCache.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/freepage/InMemoryBufferCache.java
new file mode 100644
index 0000000..66d8ec2
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/freepage/InMemoryBufferCache.java
@@ -0,0 +1,206 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.freepage;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.locks.ReadWriteLock;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICacheMemoryAllocator;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPageInternal;
+import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapManager;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class InMemoryBufferCache implements IInMemoryBufferCache {
+    protected final ICacheMemoryAllocator allocator;
+    protected final IFileMapManager fileMapManager;
+    protected final int pageSize;
+    protected final int numPages;
+    protected final List<CachedPage> overflowPages = new ArrayList<CachedPage>();
+    protected CachedPage[] pages;
+
+    public InMemoryBufferCache(ICacheMemoryAllocator allocator, int pageSize, int numPages,
+            IFileMapManager fileMapManager) {
+        this.allocator = allocator;
+        this.fileMapManager = fileMapManager;
+        this.pageSize = pageSize;
+        this.numPages = numPages;
+    }
+
+    public void open() {
+        pages = new CachedPage[numPages];
+        ByteBuffer[] buffers = allocator.allocate(pageSize, numPages);
+        for (int i = 0; i < buffers.length; ++i) {
+            pages[i] = new CachedPage(i, buffers[i]);
+        }
+    }
+
+    @Override
+    public ICachedPage pin(long dpid, boolean newPage) {
+        int pageId = BufferedFileHandle.getPageId(dpid);
+        if (pageId < pages.length) {
+            // Common case: Return regular page.
+            return pages[pageId];
+        } else {
+            // Rare case: Return overflow page, possibly expanding overflow array.
+            synchronized (overflowPages) {
+                int numNewPages = pageId - pages.length - overflowPages.size() + 1;
+                if (numNewPages > 0) {
+                    ByteBuffer[] buffers = allocator.allocate(pageSize, numNewPages);
+                    for (int i = 0; i < numNewPages; i++) {
+                        CachedPage overflowPage = new CachedPage(pages.length + overflowPages.size(), buffers[i]);
+                        overflowPages.add(overflowPage);
+                    }
+                }
+                return overflowPages.get(pageId - pages.length);
+            }
+        }
+    }
+
+    @Override
+    public ICachedPage tryPin(long dpid) throws HyracksDataException {
+        return pin(dpid, false);
+    }
+
+    @Override
+    public int getPageSize() {
+        return pageSize;
+    }
+
+    @Override
+    public int getNumPages() {
+        return numPages;
+    }
+
+    @Override
+    public ICachedPageInternal getPage(int cpid) {
+        return pages[cpid];
+    }
+
+    public int getNumOverflowPages() {
+        return overflowPages.size();
+    }
+
+    @Override
+    public void createFile(FileReference fileRef) throws HyracksDataException {
+        synchronized (fileMapManager) {
+            fileMapManager.registerFile(fileRef);
+        }
+    }
+
+    @Override
+    public void openFile(int fileId) throws HyracksDataException {
+        // Do nothing.
+    }
+
+    @Override
+    public void closeFile(int fileId) throws HyracksDataException {
+        // Do nothing.
+    }
+
+    @Override
+    public void deleteFile(int fileId, boolean flushDirtyPages) throws HyracksDataException {
+        synchronized (fileMapManager) {
+            fileMapManager.unregisterFile(fileId);
+        }
+    }
+
+    @Override
+    public void unpin(ICachedPage page) throws HyracksDataException {
+        // Do Nothing.
+    }
+
+    @Override
+    public void close() {
+        for (int i = 0; i < numPages; ++i) {
+            pages[i] = null;
+        }
+        overflowPages.clear();
+    }
+
+    public class CachedPage implements ICachedPageInternal {
+        private final int cpid;
+        private final ByteBuffer buffer;
+        private final ReadWriteLock latch;
+
+        public CachedPage(int cpid, ByteBuffer buffer) {
+            this.cpid = cpid;
+            this.buffer = buffer;
+            latch = new ReentrantReadWriteLock(true);
+        }
+
+        @Override
+        public ByteBuffer getBuffer() {
+            return buffer;
+        }
+
+        @Override
+        public Object getReplacementStrategyObject() {
+            // Do nothing.
+            return null;
+        }
+
+        @Override
+        public boolean pinIfGoodVictim() {
+            // Do nothing.
+            return false;
+        }
+
+        @Override
+        public int getCachedPageId() {
+            return cpid;
+        }
+
+        @Override
+        public void acquireReadLatch() {
+            latch.readLock().lock();
+        }
+
+        @Override
+        public void acquireWriteLatch() {
+            latch.writeLock().lock();
+        }
+
+        @Override
+        public void releaseReadLatch() {
+            latch.readLock().unlock();
+        }
+
+        @Override
+        public void releaseWriteLatch() {
+            latch.writeLock().unlock();
+        }
+    }
+
+    @Override
+    public void force(int fileId, boolean metadata) throws HyracksDataException {
+    }
+
+    @Override
+    public void flushDirtyPage(ICachedPage page) throws HyracksDataException {
+    }
+
+    public IFileMapProvider getFileMapProvider() {
+        return fileMapManager;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/freepage/InMemoryFreePageManager.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/freepage/InMemoryFreePageManager.java
new file mode 100644
index 0000000..c601a9b
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/freepage/InMemoryFreePageManager.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.freepage;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrame;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
+
+public class InMemoryFreePageManager implements IInMemoryFreePageManager {
+    protected final int capacity;
+    protected final AtomicInteger currentPageId = new AtomicInteger();
+    protected final ITreeIndexMetaDataFrameFactory metaDataFrameFactory;
+
+    public InMemoryFreePageManager(int capacity, ITreeIndexMetaDataFrameFactory metaDataFrameFactory) {
+        // We start the currentPageId from 1, because the BTree uses
+        // the first page as metadata page, and the second page as root page.
+        // (when returning free pages we first increment, then get)
+        currentPageId.set(1);
+        this.capacity = capacity;
+        this.metaDataFrameFactory = metaDataFrameFactory;
+    }
+
+    @Override
+    public int getFreePage(ITreeIndexMetaDataFrame metaFrame) throws HyracksDataException {
+        // The very first call returns page id 2 because the BTree uses
+        // the first page as metadata page, and the second page as root page.
+        return currentPageId.incrementAndGet();
+    }
+
+    @Override
+    public int getMaxPage(ITreeIndexMetaDataFrame metaFrame) throws HyracksDataException {
+        return currentPageId.get();
+    }
+
+    @Override
+    public void init(ITreeIndexMetaDataFrame metaFrame, int currentMaxPage) throws HyracksDataException {
+        currentPageId.set(1);
+    }
+
+    @Override
+    public ITreeIndexMetaDataFrameFactory getMetaDataFrameFactory() {
+        return metaDataFrameFactory;
+    }
+
+    public int getCapacity() {
+        return capacity - 2;
+    }
+
+    public void reset() {
+        currentPageId.set(1);
+    }
+
+    public boolean isFull() {
+        return currentPageId.get() >= capacity;
+    }
+
+    @Override
+    public void addFreePage(ITreeIndexMetaDataFrame metaFrame, int freePage) throws HyracksDataException {
+    }
+
+    @Override
+    public byte getMetaPageLevelIndicator() {
+        return 0;
+    }
+
+    @Override
+    public byte getFreePageLevelIndicator() {
+        return 0;
+    }
+
+    @Override
+    public boolean isMetaPage(ITreeIndexMetaDataFrame metaFrame) {
+        return false;
+    }
+
+    @Override
+    public boolean isFreePage(ITreeIndexMetaDataFrame metaFrame) {
+        return false;
+    }
+
+    @Override
+    public int getFirstMetadataPage() {
+        // Method doesn't make sense for this free page manager.
+        return -1;
+    }
+
+    @Override
+    public void open(int fileId) {
+        // Method doesn't make sense for this free page manager.
+    }
+
+    @Override
+    public void close() {
+        // Method doesn't make sense for this free page manager.
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/AbstractImmutableLSMComponent.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/AbstractImmutableLSMComponent.java
new file mode 100644
index 0000000..b6fc2f7
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/AbstractImmutableLSMComponent.java
@@ -0,0 +1,69 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+
+public abstract class AbstractImmutableLSMComponent implements ILSMComponent {
+
+    private ComponentState state;
+    private int readerCount;
+
+    private enum ComponentState {
+        READABLE,
+        READABLE_MERGING,
+        KILLED
+    }
+
+    public AbstractImmutableLSMComponent() {
+        state = ComponentState.READABLE;
+        readerCount = 0;
+    }
+
+    @Override
+    public synchronized boolean threadEnter(LSMOperationType opType) {
+        if (state == ComponentState.KILLED) {
+            return false;
+        }
+
+        switch (opType) {
+            case MODIFICATION:
+            case SEARCH:
+                readerCount++;
+                break;
+            case MERGE:
+                if (state == ComponentState.READABLE_MERGING) {
+                    return false;
+                }
+                state = ComponentState.READABLE_MERGING;
+                readerCount++;
+                break;
+            default:
+                throw new UnsupportedOperationException("Unsupported operation " + opType);
+        }
+        return true;
+    }
+
+    @Override
+    public synchronized void threadExit(LSMOperationType opType, boolean failedOperation) throws HyracksDataException {
+        switch (opType) {
+            case MERGE:
+                if (failedOperation) {
+                    state = ComponentState.READABLE;
+                }
+            case MODIFICATION:
+            case SEARCH:
+                readerCount--;
+
+                if (readerCount == 0 && state == ComponentState.READABLE_MERGING) {
+                    destroy();
+                    state = ComponentState.KILLED;
+                }
+                break;
+            default:
+                throw new UnsupportedOperationException("Unsupported operation " + opType);
+        }
+    }
+
+    protected abstract void destroy() throws HyracksDataException;
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/AbstractLSMIndex.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/AbstractLSMIndex.java
new file mode 100644
index 0000000..e4dd369
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/AbstractLSMIndex.java
@@ -0,0 +1,193 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicReference;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrame;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexInternal;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTracker;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public abstract class AbstractLSMIndex implements ILSMIndexInternal {
+    protected final static double MAX_BLOOM_FILTER_ACCEPTABLE_FALSE_POSITIVE_RATE = 0.01;
+
+    protected final ILSMHarness lsmHarness;
+
+    protected final ILSMIOOperationScheduler ioScheduler;
+    protected final ILSMIOOperationCallbackProvider ioOpCallbackProvider;
+
+    // In-memory components.   
+    protected final IInMemoryFreePageManager memFreePageManager;
+
+    // On-disk components.    
+    protected final IBufferCache diskBufferCache;
+    protected final ILSMIndexFileManager fileManager;
+    protected final IFileMapProvider diskFileMapProvider;
+    protected final AtomicReference<List<ILSMComponent>> componentsRef;
+
+    protected boolean isActivated;
+
+    private boolean needsFlush = false;
+
+    public AbstractLSMIndex(IInMemoryFreePageManager memFreePageManager, IBufferCache diskBufferCache,
+            ILSMIndexFileManager fileManager, IFileMapProvider diskFileMapProvider, ILSMMergePolicy mergePolicy,
+            ILSMOperationTrackerFactory opTrackerFactory, ILSMIOOperationScheduler ioScheduler,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
+        this.memFreePageManager = memFreePageManager;
+        this.diskBufferCache = diskBufferCache;
+        this.diskFileMapProvider = diskFileMapProvider;
+        this.fileManager = fileManager;
+        this.ioScheduler = ioScheduler;
+        this.ioOpCallbackProvider = ioOpCallbackProvider;
+        ILSMOperationTracker opTracker = opTrackerFactory.createOperationTracker(this);
+        lsmHarness = new LSMHarness(this, mergePolicy, opTracker);
+        isActivated = false;
+        componentsRef = new AtomicReference<List<ILSMComponent>>();
+        componentsRef.set(new LinkedList<ILSMComponent>());
+    }
+
+    protected void forceFlushDirtyPages(ITreeIndex treeIndex) throws HyracksDataException {
+        int fileId = treeIndex.getFileId();
+        IBufferCache bufferCache = treeIndex.getBufferCache();
+        // Flush all dirty pages of the tree. 
+        // By default, metadata and data are flushed asynchronously in the buffercache.
+        // This means that the flush issues writes to the OS, but the data may still lie in filesystem buffers.
+        ITreeIndexMetaDataFrame metadataFrame = treeIndex.getFreePageManager().getMetaDataFrameFactory().createFrame();
+        int startPage = 0;
+        int maxPage = treeIndex.getFreePageManager().getMaxPage(metadataFrame);
+        forceFlushDirtyPages(bufferCache, fileId, startPage, maxPage);
+    }
+
+    protected void forceFlushDirtyPages(IBufferCache bufferCache, int fileId, int startPageId, int endPageId)
+            throws HyracksDataException {
+        for (int i = startPageId; i <= endPageId; i++) {
+            ICachedPage page = bufferCache.tryPin(BufferedFileHandle.getDiskPageId(fileId, i));
+            // If tryPin returns null, it means the page is not cached, and therefore cannot be dirty.
+            if (page == null) {
+                continue;
+            }
+            try {
+                bufferCache.flushDirtyPage(page);
+            } finally {
+                bufferCache.unpin(page);
+            }
+        }
+        // Forces all pages of given file to disk. This guarantees the data makes it to disk.
+        bufferCache.force(fileId, true);
+    }
+
+    protected void markAsValidInternal(ITreeIndex treeIndex) throws HyracksDataException {
+        int fileId = treeIndex.getFileId();
+        IBufferCache bufferCache = treeIndex.getBufferCache();
+        ITreeIndexMetaDataFrame metadataFrame = treeIndex.getFreePageManager().getMetaDataFrameFactory().createFrame();
+        // Mark the component as a valid component by flushing the metadata page to disk
+        int metadataPageId = treeIndex.getFreePageManager().getFirstMetadataPage();
+        ICachedPage metadataPage = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, metadataPageId), false);
+        metadataPage.acquireWriteLatch();
+        try {
+            metadataFrame.setPage(metadataPage);
+            metadataFrame.setValid(true);
+
+            // Flush the single modified page to disk.
+            bufferCache.flushDirtyPage(metadataPage);
+
+            // Force modified metadata page to disk.
+            bufferCache.force(fileId, true);
+        } finally {
+            metadataPage.releaseWriteLatch();
+            bufferCache.unpin(metadataPage);
+        }
+    }
+
+    @Override
+    public void addComponent(ILSMComponent c) {
+        List<ILSMComponent> oldList = componentsRef.get();
+        List<ILSMComponent> newList = new ArrayList<ILSMComponent>();
+        newList.add(c);
+        for (ILSMComponent oc : oldList) {
+            newList.add(oc);
+        }
+        componentsRef.set(newList);
+    }
+
+    @Override
+    public void subsumeMergedComponents(ILSMComponent newComponent, List<ILSMComponent> mergedComponents) {
+        List<ILSMComponent> oldList = componentsRef.get();
+        List<ILSMComponent> newList = new ArrayList<ILSMComponent>();
+        int swapIndex = oldList.indexOf(mergedComponents.get(0));
+        int swapSize = mergedComponents.size();
+        for (int i = 0; i < oldList.size(); i++) {
+            if (i < swapIndex || i >= swapIndex + swapSize) {
+                newList.add(oldList.get(i));
+            } else if (i == swapIndex) {
+                newList.add(newComponent);
+            }
+        }
+        componentsRef.set(newList);
+    }
+
+    @Override
+    public IInMemoryFreePageManager getInMemoryFreePageManager() {
+        return memFreePageManager;
+    }
+
+    @Override
+    public List<ILSMComponent> getImmutableComponents() {
+        return componentsRef.get();
+    }
+
+    @Override
+    public void setFlushStatus(boolean needsFlush) {
+        this.needsFlush = needsFlush;
+    }
+
+    @Override
+    public boolean getFlushStatus() {
+        return needsFlush;
+    }
+
+    @Override
+    public ILSMOperationTracker getOperationTracker() {
+        return lsmHarness.getOperationTracker();
+    }
+
+    @Override
+    public ILSMIOOperationScheduler getIOScheduler() {
+        return ioScheduler;
+    }
+
+    @Override
+    public IBufferCache getBufferCache() {
+        return diskBufferCache;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/AbstractLSMIndexFileManager.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/AbstractLSMIndexFileManager.java
new file mode 100644
index 0000000..a808143
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/AbstractLSMIndexFileManager.java
@@ -0,0 +1,313 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.text.Format;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.Date;
+import java.util.HashSet;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrame;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public abstract class AbstractLSMIndexFileManager implements ILSMIndexFileManager {
+
+    protected static final String SPLIT_STRING = "_";
+    protected static final String BLOOM_FILTER_STRING = "f";
+
+    // Use all IODevices registered in ioManager in a round-robin fashion to choose
+    // where to flush and merge
+    protected final IIOManager ioManager;
+    protected final IFileMapProvider fileMapProvider;
+
+    // baseDir should reflect dataset name and partition name.
+    protected String baseDir;
+    protected final Format formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss-SSS");
+    protected final Comparator<String> cmp = new FileNameComparator();
+    protected final Comparator<ComparableFileName> recencyCmp = new RecencyComparator();
+
+    protected final TreeIndexFactory<? extends ITreeIndex> treeFactory;
+
+    // The current index for the round-robin file assignment
+    private int ioDeviceIndex = 0;
+
+    public AbstractLSMIndexFileManager(IIOManager ioManager, IFileMapProvider fileMapProvider, FileReference file,
+            TreeIndexFactory<? extends ITreeIndex> treeFactory, int startIODeviceIndex) {
+        this.baseDir = file.getFile().getPath();
+        if (!baseDir.endsWith(System.getProperty("file.separator"))) {
+            baseDir += System.getProperty("file.separator");
+        }
+        this.fileMapProvider = fileMapProvider;
+        this.ioManager = ioManager;
+        this.treeFactory = treeFactory;
+        ioDeviceIndex = startIODeviceIndex % ioManager.getIODevices().size();
+    }
+
+    private static FilenameFilter fileNameFilter = new FilenameFilter() {
+        public boolean accept(File dir, String name) {
+            return !name.startsWith(".");
+        }
+    };
+
+    protected boolean isValidTreeIndex(ITreeIndex treeIndex) throws HyracksDataException {
+        IBufferCache bufferCache = treeIndex.getBufferCache();
+        treeIndex.activate();
+        try {
+            int metadataPage = treeIndex.getFreePageManager().getFirstMetadataPage();
+            ITreeIndexMetaDataFrame metadataFrame = treeIndex.getFreePageManager().getMetaDataFrameFactory()
+                    .createFrame();
+            ICachedPage page = bufferCache.pin(BufferedFileHandle.getDiskPageId(treeIndex.getFileId(), metadataPage),
+                    false);
+            page.acquireReadLatch();
+            try {
+                metadataFrame.setPage(page);
+                return metadataFrame.isValid();
+            } finally {
+                page.releaseReadLatch();
+                bufferCache.unpin(page);
+            }
+        } finally {
+            treeIndex.deactivate();
+        }
+    }
+
+    protected void cleanupAndGetValidFilesInternal(IODeviceHandle dev, FilenameFilter filter,
+            TreeIndexFactory<? extends ITreeIndex> treeFactory, ArrayList<ComparableFileName> allFiles)
+            throws HyracksDataException, IndexException {
+        File dir = new File(dev.getPath(), baseDir);
+        String[] files = dir.list(filter);
+        for (String fileName : files) {
+            File file = new File(dir.getPath() + File.separator + fileName);
+            FileReference fileRef = new FileReference(file);
+            if (treeFactory == null || isValidTreeIndex(treeFactory.createIndexInstance(fileRef))) {
+                allFiles.add(new ComparableFileName(fileRef));
+            } else {
+                file.delete();
+            }
+        }
+    }
+
+    protected void validateFiles(IODeviceHandle dev, HashSet<String> groundTruth,
+            ArrayList<ComparableFileName> validFiles, FilenameFilter filter,
+            TreeIndexFactory<? extends ITreeIndex> treeFactory) throws HyracksDataException, IndexException {
+        ArrayList<ComparableFileName> tmpAllInvListsFiles = new ArrayList<ComparableFileName>();
+        cleanupAndGetValidFilesInternal(dev, filter, treeFactory, tmpAllInvListsFiles);
+        for (ComparableFileName cmpFileName : tmpAllInvListsFiles) {
+            int index = cmpFileName.fileName.lastIndexOf(SPLIT_STRING);
+            String file = cmpFileName.fileName.substring(0, index);
+            if (groundTruth.contains(file)) {
+                validFiles.add(cmpFileName);
+            } else {
+                File invalidFile = new File(cmpFileName.fullPath);
+                invalidFile.delete();
+            }
+        }
+    }
+
+    @Override
+    public void createDirs() {
+        for (IODeviceHandle dev : ioManager.getIODevices()) {
+            File f = new File(dev.getPath(), baseDir);
+            f.mkdirs();
+        }
+    }
+
+    @Override
+    public void deleteDirs() {
+        for (IODeviceHandle dev : ioManager.getIODevices()) {
+            File f = new File(dev.getPath(), baseDir);
+            delete(f);
+        }
+    }
+
+    private void delete(File f) {
+        if (f.isDirectory()) {
+            for (File c : f.listFiles()) {
+                delete(c);
+            }
+        }
+        f.delete();
+    }
+
+    protected static FilenameFilter bloomFilterFilter = new FilenameFilter() {
+        public boolean accept(File dir, String name) {
+            return !name.startsWith(".") && name.endsWith(BLOOM_FILTER_STRING);
+        }
+    };
+
+    protected FileReference createFlushFile(String relFlushFileName) {
+        // Assigns new files to I/O devices in round-robin fashion.
+        IODeviceHandle dev = ioManager.getIODevices().get(ioDeviceIndex);
+        ioDeviceIndex = (ioDeviceIndex + 1) % ioManager.getIODevices().size();
+        return dev.createFileReference(relFlushFileName);
+    }
+
+    protected FileReference createMergeFile(String relMergeFileName) {
+        return createFlushFile(relMergeFileName);
+    }
+
+    @Override
+    public LSMComponentFileReferences getRelFlushFileReference() {
+        Date date = new Date();
+        String ts = formatter.format(date);
+        // Begin timestamp and end timestamp are identical since it is a flush
+        return new LSMComponentFileReferences(createFlushFile(baseDir + ts + SPLIT_STRING + ts), null, null);
+    }
+
+    @Override
+    public LSMComponentFileReferences getRelMergeFileReference(String firstFileName, String lastFileName)
+            throws HyracksDataException {
+        String[] firstTimestampRange = firstFileName.split(SPLIT_STRING);
+        String[] lastTimestampRange = lastFileName.split(SPLIT_STRING);
+        // Get the range of timestamps by taking the earliest and the latest timestamps
+        return new LSMComponentFileReferences(createMergeFile(baseDir + firstTimestampRange[0] + SPLIT_STRING
+                + lastTimestampRange[1]), null, null);
+    }
+
+    @Override
+    public List<LSMComponentFileReferences> cleanupAndGetValidFiles() throws HyracksDataException, IndexException {
+        List<LSMComponentFileReferences> validFiles = new ArrayList<LSMComponentFileReferences>();
+        ArrayList<ComparableFileName> allFiles = new ArrayList<ComparableFileName>();
+
+        // Gather files from all IODeviceHandles and delete invalid files
+        // There are two types of invalid files:
+        // (1) The isValid flag is not set
+        // (2) The file's interval is contained by some other file
+        // Here, we only filter out (1).
+        for (IODeviceHandle dev : ioManager.getIODevices()) {
+            cleanupAndGetValidFilesInternal(dev, fileNameFilter, treeFactory, allFiles);
+        }
+
+        if (allFiles.isEmpty()) {
+            return validFiles;
+        }
+
+        if (allFiles.size() == 1) {
+            validFiles.add(new LSMComponentFileReferences(allFiles.get(0).fileRef, null, null));
+            return validFiles;
+        }
+
+        // Sorts files names from earliest to latest timestamp.
+        Collections.sort(allFiles);
+
+        List<ComparableFileName> validComparableFiles = new ArrayList<ComparableFileName>();
+        ComparableFileName last = allFiles.get(0);
+        validComparableFiles.add(last);
+        for (int i = 1; i < allFiles.size(); i++) {
+            ComparableFileName current = allFiles.get(i);
+            // The current start timestamp is greater than last stop timestamp so current is valid.
+            if (current.interval[0].compareTo(last.interval[1]) > 0) {
+                validComparableFiles.add(current);
+                last = current;
+            } else if (current.interval[0].compareTo(last.interval[0]) >= 0
+                    && current.interval[1].compareTo(last.interval[1]) <= 0) {
+                // The current file is completely contained in the interval of the 
+                // last file. Thus the last file must contain at least as much information 
+                // as the current file, so delete the current file.
+                current.fileRef.delete();
+            } else {
+                // This scenario should not be possible since timestamps are monotonically increasing.
+                throw new HyracksDataException("Found LSM files with overlapping timestamp intervals, "
+                        + "but the intervals were not contained by another file.");
+            }
+        }
+
+        // Sort valid files in reverse lexicographical order, such that newer files come first.
+        Collections.sort(validComparableFiles, recencyCmp);
+        for (ComparableFileName cmpFileName : validComparableFiles) {
+            validFiles.add(new LSMComponentFileReferences(cmpFileName.fileRef, null, null));
+        }
+
+        return validFiles;
+    }
+
+    @Override
+    public Comparator<String> getFileNameComparator() {
+        return cmp;
+    }
+
+    /**
+     * Sorts strings in reverse lexicographical order. The way we construct the
+     * file names above guarantees that:
+     * 1. Flushed files sort lower than merged files
+     * 2. Flushed files are sorted from newest to oldest (based on the timestamp
+     * string)
+     */
+    private class FileNameComparator implements Comparator<String> {
+        @Override
+        public int compare(String a, String b) {
+            // Consciously ignoring locale.
+            return -a.compareTo(b);
+        }
+    }
+
+    @Override
+    public String getBaseDir() {
+        return baseDir;
+    }
+
+    protected class ComparableFileName implements Comparable<ComparableFileName> {
+        public final FileReference fileRef;
+        public final String fullPath;
+        public final String fileName;
+
+        // Timestamp interval.
+        public final String[] interval;
+
+        public ComparableFileName(FileReference fileRef) {
+            this.fileRef = fileRef;
+            this.fullPath = fileRef.getFile().getAbsolutePath();
+            this.fileName = fileRef.getFile().getName();
+            interval = fileName.split(SPLIT_STRING);
+        }
+
+        @Override
+        public int compareTo(ComparableFileName b) {
+            int startCmp = interval[0].compareTo(b.interval[0]);
+            if (startCmp != 0) {
+                return startCmp;
+            }
+            return b.interval[1].compareTo(interval[1]);
+        }
+    }
+
+    private class RecencyComparator implements Comparator<ComparableFileName> {
+        @Override
+        public int compare(ComparableFileName a, ComparableFileName b) {
+            int cmp = -a.interval[0].compareTo(b.interval[0]);
+            if (cmp != 0) {
+                return cmp;
+            }
+            return -a.interval[1].compareTo(b.interval[1]);
+        }
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/AbstractMutableLSMComponent.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/AbstractMutableLSMComponent.java
new file mode 100644
index 0000000..5cde7bc
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/AbstractMutableLSMComponent.java
@@ -0,0 +1,118 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+
+public abstract class AbstractMutableLSMComponent implements ILSMComponent {
+
+    private int readerCount;
+    private int writerCount;
+    private ComponentState state;
+    
+    private boolean isModified;
+
+    private enum ComponentState {
+        READABLE_WRITABLE,
+        READABLE_UNWRITABLE,
+        READABLE_UNWRITABLE_FLUSHING,
+        UNREADABLE_UNWRITABLE
+    }
+
+    public AbstractMutableLSMComponent() {
+        readerCount = 0;
+        writerCount = 0;
+        state = ComponentState.READABLE_WRITABLE;
+        isModified = false;
+    }
+
+    @Override
+    public synchronized boolean threadEnter(LSMOperationType opType) throws InterruptedException {
+        switch (opType) {
+            case FORCE_MODIFICATION:
+                if (state != ComponentState.READABLE_WRITABLE && state != ComponentState.READABLE_UNWRITABLE) {
+                    return false;
+                }
+                writerCount++;
+                break;
+            case MODIFICATION:
+                if (state != ComponentState.READABLE_WRITABLE) {
+                    return false;
+                }
+                writerCount++;
+                break;
+            case SEARCH:
+                if (state == ComponentState.UNREADABLE_UNWRITABLE) {
+                    return false;
+                }
+                readerCount++;
+                break;
+            case FLUSH:
+                if (state == ComponentState.READABLE_UNWRITABLE_FLUSHING
+                        || state == ComponentState.UNREADABLE_UNWRITABLE) {
+                    return false;
+                }
+
+                state = ComponentState.READABLE_UNWRITABLE_FLUSHING;
+                while (writerCount > 0) {
+                    wait();
+                }
+                readerCount++;
+                break;
+            default:
+                throw new UnsupportedOperationException("Unsupported operation " + opType);
+        }
+        return true;
+    }
+
+    @Override
+    public synchronized void threadExit(LSMOperationType opType, boolean failedOperation) throws HyracksDataException {
+        switch (opType) {
+            case FORCE_MODIFICATION:
+            case MODIFICATION:
+                writerCount--;
+                if (state == ComponentState.READABLE_WRITABLE && isFull()) {
+                    state = ComponentState.READABLE_UNWRITABLE;
+                }
+                break;
+            case SEARCH:
+                readerCount--;
+                if (state == ComponentState.UNREADABLE_UNWRITABLE && readerCount == 0) {
+                    reset();
+                    state = ComponentState.READABLE_WRITABLE;
+                } else if (state == ComponentState.READABLE_WRITABLE && isFull()) {
+                    state = ComponentState.READABLE_UNWRITABLE;
+                }
+                break;
+            case FLUSH:
+                if (failedOperation) {
+                    state = isFull() ? ComponentState.READABLE_UNWRITABLE : ComponentState.READABLE_WRITABLE;
+                }
+                readerCount--;
+                if (readerCount == 0) {
+                    reset();
+                    state = ComponentState.READABLE_WRITABLE;
+                } else if (state == ComponentState.READABLE_UNWRITABLE_FLUSHING) {
+                    state = ComponentState.UNREADABLE_UNWRITABLE;
+                }
+                break;
+            default:
+                throw new UnsupportedOperationException("Unsupported operation " + opType);
+        }
+        notifyAll();
+    }
+    
+
+    public void setIsModified() {
+        isModified = true;
+    }
+
+    public boolean isModified() {
+        return isModified;
+    }
+
+    protected abstract boolean isFull();
+
+    protected void reset() throws HyracksDataException {
+        isModified = false;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/BTreeFactory.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/BTreeFactory.java
new file mode 100644
index 0000000..008c418
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/BTreeFactory.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManagerFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class BTreeFactory extends TreeIndexFactory<BTree> {
+
+    public BTreeFactory(IBufferCache bufferCache, IFileMapProvider fileMapProvider,
+            IFreePageManagerFactory freePageManagerFactory, ITreeIndexFrameFactory interiorFrameFactory,
+            ITreeIndexFrameFactory leafFrameFactory, IBinaryComparatorFactory[] cmpFactories, int fieldCount) {
+        super(bufferCache, fileMapProvider, freePageManagerFactory, interiorFrameFactory, leafFrameFactory,
+                cmpFactories, fieldCount);
+    }
+
+    @Override
+    public BTree createIndexInstance(FileReference file) throws IndexException {
+        return new BTree(bufferCache, fileMapProvider, freePageManagerFactory.createFreePageManager(),
+                interiorFrameFactory, leafFrameFactory, cmpFactories, fieldCount, file);
+    }
+
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/BlockingIOOperationCallbackWrapper.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/BlockingIOOperationCallbackWrapper.java
new file mode 100644
index 0000000..34e1f0d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/BlockingIOOperationCallbackWrapper.java
@@ -0,0 +1,43 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+
+public class BlockingIOOperationCallbackWrapper implements ILSMIOOperationCallback {
+
+    private boolean notified = false;
+
+    private final ILSMIOOperationCallback wrappedCallback;
+
+    public BlockingIOOperationCallbackWrapper(ILSMIOOperationCallback callback) {
+        this.wrappedCallback = callback;
+    }
+
+    public synchronized void waitForIO() throws InterruptedException {
+        if (!notified) {
+            this.wait();
+        }
+        notified = false;
+    }
+
+    @Override
+    public void beforeOperation() throws HyracksDataException {
+        wrappedCallback.beforeOperation();
+    }
+
+    @Override
+    public void afterOperation(List<ILSMComponent> oldComponents, ILSMComponent newComponent)
+            throws HyracksDataException {
+        wrappedCallback.afterOperation(oldComponents, newComponent);
+    }
+
+    @Override
+    public synchronized void afterFinalize(ILSMComponent newComponent) throws HyracksDataException {
+        wrappedCallback.afterFinalize(newComponent);
+        this.notifyAll();
+        notified = true;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/BloomFilterAwareBTreePointSearchCursor.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/BloomFilterAwareBTreePointSearchCursor.java
new file mode 100644
index 0000000..af08bdb
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/BloomFilterAwareBTreePointSearchCursor.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilter;
+import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeRangeSearchCursor;
+
+public class BloomFilterAwareBTreePointSearchCursor extends BTreeRangeSearchCursor {
+    private final BloomFilter bloomFilter;
+    private long[] hashes = new long[2];
+
+    public BloomFilterAwareBTreePointSearchCursor(IBTreeLeafFrame frame, boolean exclusiveLatchNodes,
+            BloomFilter bloomFilter) {
+        super(frame, exclusiveLatchNodes);
+        this.bloomFilter = bloomFilter;
+    }
+
+    @Override
+    public boolean hasNext() throws HyracksDataException {
+        if (bloomFilter.contains(lowKey, hashes)) {
+            return super.hasNext();
+        }
+        return false;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/ConstantMergePolicy.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/ConstantMergePolicy.java
new file mode 100644
index 0000000..1c72abf
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/ConstantMergePolicy.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+
+public class ConstantMergePolicy implements ILSMMergePolicy {
+
+    private final int threshold;
+
+    public ConstantMergePolicy(int threshold) {
+        this.threshold = threshold;
+    }
+
+    @Override
+    public void diskComponentAdded(final ILSMIndex index, int totalNumDiskComponents) throws HyracksDataException,
+            IndexException {
+        if (totalNumDiskComponents >= threshold) {
+            ILSMIndexAccessor accessor = (ILSMIndexAccessor) index.createAccessor(NoOpOperationCallback.INSTANCE,
+                    NoOpOperationCallback.INSTANCE);
+            accessor.scheduleMerge(NoOpIOOperationCallback.INSTANCE);
+        }
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/ConstantMergePolicyProvider.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/ConstantMergePolicyProvider.java
new file mode 100644
index 0000000..b404c9b
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/ConstantMergePolicyProvider.java
@@ -0,0 +1,22 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicyProvider;
+
+public class ConstantMergePolicyProvider implements ILSMMergePolicyProvider {
+
+    private static final long serialVersionUID = 1L;
+
+    private final int threshold;
+
+    public ConstantMergePolicyProvider(int threshold) {
+        this.threshold = threshold;
+    }
+
+    @Override
+    public ILSMMergePolicy getMergePolicy(IHyracksTaskContext ctx) {
+        return new ConstantMergePolicy(threshold);
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/IndexFactory.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/IndexFactory.java
new file mode 100644
index 0000000..3feaecf
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/IndexFactory.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManagerFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public abstract class IndexFactory<T extends IIndex> {
+
+    protected final IBufferCache bufferCache;
+    protected final IFileMapProvider fileMapProvider;
+    protected final IFreePageManagerFactory freePageManagerFactory;
+
+    public IndexFactory(IBufferCache bufferCache, IFileMapProvider fileMapProvider,
+            IFreePageManagerFactory freePageManagerFactory) {
+        this.bufferCache = bufferCache;
+        this.fileMapProvider = fileMapProvider;
+        this.freePageManagerFactory = freePageManagerFactory;
+    }
+
+    public abstract T createIndexInstance(FileReference file) throws IndexException;
+
+    public IBufferCache getBufferCache() {
+        return bufferCache;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMComponentFileReferences.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMComponentFileReferences.java
new file mode 100644
index 0000000..019dca4
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMComponentFileReferences.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.api.io.FileReference;
+
+public final class LSMComponentFileReferences {
+
+    // The FileReference for the index that is used for inserting records of the component. For instance, this will be the FileReference of the RTree in one component of the LSM-RTree.
+    private final FileReference insertIndexFileReference;
+    // This FileReference for the delete index (if any). For example, this will be the the FileReference of the buddy BTree in one component of the LSM-RTree.
+    private final FileReference deleteIndexFileReference;
+
+    // This FileReference for the bloom filter (if any). 
+    private final FileReference bloomFilterFileReference;
+
+    public LSMComponentFileReferences(FileReference insertIndexFileReference, FileReference deleteIndexFileReference,
+            FileReference bloomFilterFileReference) {
+        this.insertIndexFileReference = insertIndexFileReference;
+        this.deleteIndexFileReference = deleteIndexFileReference;
+        this.bloomFilterFileReference = bloomFilterFileReference;
+    }
+
+    public FileReference getInsertIndexFileReference() {
+        return insertIndexFileReference;
+    }
+
+    public FileReference getDeleteIndexFileReference() {
+        return deleteIndexFileReference;
+    }
+
+    public FileReference getBloomFilterFileReference() {
+        return bloomFilterFileReference;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMComponentState.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMComponentState.java
new file mode 100644
index 0000000..e554a6e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMComponentState.java
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+public enum LSMComponentState {
+    FLUSHING,
+    MERGING,
+    DONE_FLUSHING,
+    DONE_MERGING
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMHarness.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMHarness.java
new file mode 100644
index 0000000..65e6a3d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMHarness.java
@@ -0,0 +1,239 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexInternal;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTracker;
+
+public class LSMHarness implements ILSMHarness {
+    private final ILSMIndexInternal lsmIndex;
+    private final ILSMMergePolicy mergePolicy;
+    private final ILSMOperationTracker opTracker;
+
+    public LSMHarness(ILSMIndexInternal lsmIndex, ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker) {
+        this.lsmIndex = lsmIndex;
+        this.opTracker = opTracker;
+        this.mergePolicy = mergePolicy;
+    }
+
+    private void threadExit(ILSMIndexOperationContext opCtx, LSMOperationType opType) throws HyracksDataException {
+        if (!lsmIndex.getFlushStatus() && lsmIndex.getInMemoryFreePageManager().isFull()) {
+            lsmIndex.setFlushStatus(true);
+        }
+        opTracker.afterOperation(opType, opCtx.getSearchOperationCallback(), opCtx.getModificationCallback());
+    }
+
+    private boolean getAndEnterComponents(ILSMIndexOperationContext ctx, LSMOperationType opType, boolean tryOperation)
+            throws HyracksDataException {
+        int numEntered = 0;
+        boolean entranceSuccessful = false;
+        List<ILSMComponent> entered = new ArrayList<ILSMComponent>();
+
+        while (!entranceSuccessful) {
+            entered.clear();
+            lsmIndex.getOperationalComponents(ctx);
+            List<ILSMComponent> components = ctx.getComponentHolder();
+            try {
+                for (ILSMComponent c : components) {
+                    if (!c.threadEnter(opType)) {
+                        break;
+                    }
+                    numEntered++;
+                    entered.add(c);
+                }
+                entranceSuccessful = numEntered == components.size();
+            } catch (InterruptedException e) {
+                entranceSuccessful = false;
+                throw new HyracksDataException(e);
+            } finally {
+                if (!entranceSuccessful) {
+                    for (ILSMComponent c : components) {
+                        if (numEntered <= 0) {
+                            break;
+                        }
+                        c.threadExit(opType, true);
+                        numEntered--;
+                    }
+                }
+            }
+            if (tryOperation && !entranceSuccessful) {
+                return false;
+            }
+        }
+
+        opTracker.beforeOperation(opType, ctx.getSearchOperationCallback(), ctx.getModificationCallback());
+        return true;
+    }
+
+    private void exitComponents(ILSMIndexOperationContext ctx, LSMOperationType opType, boolean failedOperation)
+            throws HyracksDataException {
+        try {
+            for (ILSMComponent c : ctx.getComponentHolder()) {
+                c.threadExit(opType, failedOperation);
+            }
+        } finally {
+            threadExit(ctx, opType);
+        }
+    }
+
+    @Override
+    public void forceModify(ILSMIndexOperationContext ctx, ITupleReference tuple) throws HyracksDataException,
+            IndexException {
+        LSMOperationType opType = LSMOperationType.FORCE_MODIFICATION;
+        modify(ctx, false, tuple, opType);
+    }
+
+    @Override
+    public boolean modify(ILSMIndexOperationContext ctx, boolean tryOperation, ITupleReference tuple)
+            throws HyracksDataException, IndexException {
+        LSMOperationType opType = LSMOperationType.MODIFICATION;
+        return modify(ctx, tryOperation, tuple, opType);
+    }
+
+    private boolean modify(ILSMIndexOperationContext ctx, boolean tryOperation, ITupleReference tuple,
+            LSMOperationType opType) throws HyracksDataException, IndexException {
+        if (!getAndEnterComponents(ctx, opType, tryOperation)) {
+            return false;
+        }
+        try {
+            lsmIndex.modify(ctx, tuple);
+        } finally {
+            exitComponents(ctx, opType, false);
+        }
+
+        return true;
+    }
+
+    @Override
+    public void search(ILSMIndexOperationContext ctx, IIndexCursor cursor, ISearchPredicate pred)
+            throws HyracksDataException, IndexException {
+        LSMOperationType opType = LSMOperationType.SEARCH;
+        getAndEnterComponents(ctx, opType, false);
+        try {
+            lsmIndex.search(ctx, cursor, pred);
+        } catch (HyracksDataException e) {
+            exitComponents(ctx, opType, true);
+            throw e;
+        } catch (IndexException e) {
+            exitComponents(ctx, opType, true);
+            throw e;
+        }
+    }
+
+    @Override
+    public void endSearch(ILSMIndexOperationContext ctx) throws HyracksDataException {
+        if (ctx.getOperation() == IndexOperation.SEARCH) {
+            exitComponents(ctx, LSMOperationType.SEARCH, false);
+        }
+    }
+
+    @Override
+    public void noOp(ILSMIndexOperationContext ctx) throws HyracksDataException {
+        LSMOperationType opType = LSMOperationType.NOOP;
+        opTracker.beforeOperation(opType, ctx.getSearchOperationCallback(), ctx.getModificationCallback());
+        threadExit(ctx, opType);
+    }
+
+    @Override
+    public void scheduleFlush(ILSMIndexOperationContext ctx, ILSMIOOperationCallback callback)
+            throws HyracksDataException {
+        if (!getAndEnterComponents(ctx, LSMOperationType.FLUSH, true)) {
+            return;
+        }
+
+        lsmIndex.setFlushStatus(false);
+        
+        if (!lsmIndex.scheduleFlush(ctx, callback)) {
+            callback.beforeOperation();
+            callback.afterOperation(null, null);
+            callback.afterFinalize(null);
+            exitComponents(ctx, LSMOperationType.FLUSH, false);
+        }
+    }
+
+    @Override
+    public void flush(ILSMIndexOperationContext ctx, ILSMIOOperation operation) throws HyracksDataException,
+            IndexException {
+        operation.getCallback().beforeOperation();
+        ILSMComponent newComponent = lsmIndex.flush(operation);
+        operation.getCallback().afterOperation(null, newComponent);
+        lsmIndex.markAsValid(newComponent);
+        operation.getCallback().afterFinalize(newComponent);
+
+        lsmIndex.addComponent(newComponent);
+        int numComponents = lsmIndex.getImmutableComponents().size();
+
+        mergePolicy.diskComponentAdded(lsmIndex, numComponents);
+        exitComponents(ctx, LSMOperationType.FLUSH, false);
+    }
+
+    @Override
+    public void scheduleMerge(ILSMIndexOperationContext ctx, ILSMIOOperationCallback callback)
+            throws HyracksDataException, IndexException {
+        LSMOperationType opType = LSMOperationType.MERGE;
+        if (!getAndEnterComponents(ctx, opType, false)) {
+            return;
+        }
+        if (ctx.getComponentHolder().size() > 1) {
+            lsmIndex.scheduleMerge(ctx, callback);
+        } else {
+            exitComponents(ctx, opType, true);
+        }
+    }
+
+    @Override
+    public void merge(ILSMIndexOperationContext ctx, ILSMIOOperation operation) throws HyracksDataException,
+            IndexException {
+        List<ILSMComponent> mergedComponents = new ArrayList<ILSMComponent>();
+        operation.getCallback().beforeOperation();
+        ILSMComponent newComponent = lsmIndex.merge(mergedComponents, operation);
+        ctx.getComponentHolder().addAll(mergedComponents);
+        operation.getCallback().afterOperation(mergedComponents, newComponent);
+        lsmIndex.markAsValid(newComponent);
+        operation.getCallback().afterFinalize(newComponent);
+        lsmIndex.subsumeMergedComponents(newComponent, mergedComponents);
+        exitComponents(ctx, LSMOperationType.MERGE, false);
+    }
+
+    @Override
+    public void addBulkLoadedComponent(ILSMComponent c) throws HyracksDataException, IndexException {
+        lsmIndex.markAsValid(c);
+        lsmIndex.addComponent(c);
+        int numComponents = lsmIndex.getImmutableComponents().size();
+        mergePolicy.diskComponentAdded(lsmIndex, numComponents);
+    }
+
+    @Override
+    public ILSMOperationTracker getOperationTracker() {
+        return opTracker;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMIndexSearchCursor.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMIndexSearchCursor.java
new file mode 100644
index 0000000..7f08ba4
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMIndexSearchCursor.java
@@ -0,0 +1,211 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import java.util.Comparator;
+import java.util.List;
+import java.util.PriorityQueue;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMTreeTupleReference;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+
+public abstract class LSMIndexSearchCursor implements ITreeIndexCursor {
+    protected PriorityQueueElement outputElement;
+    protected IIndexCursor[] rangeCursors;
+    protected PriorityQueue<PriorityQueueElement> outputPriorityQueue;
+    protected PriorityQueueComparator pqCmp;
+    protected MultiComparator cmp;
+    protected boolean needPush;
+    protected boolean includeMemComponent;
+    protected ILSMHarness lsmHarness;
+    protected final ILSMIndexOperationContext opCtx;
+
+    protected List<ILSMComponent> operationalComponents;
+
+    public LSMIndexSearchCursor(ILSMIndexOperationContext opCtx) {
+        this.opCtx = opCtx;
+        outputElement = null;
+        needPush = false;
+    }
+
+    public void initPriorityQueue() throws HyracksDataException, IndexException {
+        int pqInitSize = (rangeCursors.length > 0) ? rangeCursors.length : 1;
+        outputPriorityQueue = new PriorityQueue<PriorityQueueElement>(pqInitSize, pqCmp);
+        for (int i = 0; i < rangeCursors.length; i++) {
+            pushIntoPriorityQueue(new PriorityQueueElement(i));
+        }
+    }
+
+    public IIndexCursor getCursor(int cursorIndex) {
+        return rangeCursors[cursorIndex];
+    }
+
+    @Override
+    public void reset() throws HyracksDataException, IndexException {
+        outputElement = null;
+        needPush = false;
+
+        if (outputPriorityQueue != null) {
+            outputPriorityQueue.clear();
+        }
+
+        if (rangeCursors != null) {
+            for (int i = 0; i < rangeCursors.length; i++) {
+                rangeCursors[i].reset();
+            }
+        }
+        rangeCursors = null;
+    }
+
+    @Override
+    public boolean hasNext() throws HyracksDataException, IndexException {
+        checkPriorityQueue();
+        return !outputPriorityQueue.isEmpty();
+    }
+
+    @Override
+    public void next() throws HyracksDataException {
+        outputElement = outputPriorityQueue.poll();
+        needPush = true;
+    }
+
+    @Override
+    public ICachedPage getPage() {
+        // do nothing
+        return null;
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        if (lsmHarness != null) {
+            try {
+                outputPriorityQueue.clear();
+                for (int i = 0; i < rangeCursors.length; i++) {
+                    rangeCursors[i].close();
+                }
+                rangeCursors = null;
+            } finally {
+                lsmHarness.endSearch(opCtx);
+            }
+        }
+    }
+
+    @Override
+    public void setBufferCache(IBufferCache bufferCache) {
+        // do nothing
+    }
+
+    @Override
+    public void setFileId(int fileId) {
+        // do nothing
+    }
+
+    @Override
+    public ITupleReference getTuple() {
+        return outputElement.getTuple();
+    }
+
+    protected boolean pushIntoPriorityQueue(PriorityQueueElement e) throws HyracksDataException, IndexException {
+        int cursorIndex = e.getCursorIndex();
+        if (rangeCursors[cursorIndex].hasNext()) {
+            rangeCursors[cursorIndex].next();
+            e.reset(rangeCursors[cursorIndex].getTuple());
+            outputPriorityQueue.offer(e);
+            return true;
+        }
+        rangeCursors[cursorIndex].close();
+        return false;
+    }
+
+    protected boolean isDeleted(PriorityQueueElement checkElement) throws HyracksDataException, IndexException {
+        return ((ILSMTreeTupleReference) checkElement.getTuple()).isAntimatter();
+    }
+
+    abstract protected void checkPriorityQueue() throws HyracksDataException, IndexException;
+
+    @Override
+    public boolean exclusiveLatchNodes() {
+        return false;
+    }
+
+    public class PriorityQueueElement {
+        private ITupleReference tuple;
+        private final int cursorIndex;
+
+        public PriorityQueueElement(int cursorIndex) {
+            tuple = null;
+            this.cursorIndex = cursorIndex;
+        }
+
+        public ITupleReference getTuple() {
+            return tuple;
+        }
+
+        public int getCursorIndex() {
+            return cursorIndex;
+        }
+
+        public void reset(ITupleReference tuple) {
+            this.tuple = tuple;
+        }
+    }
+
+    public class PriorityQueueComparator implements Comparator<PriorityQueueElement> {
+
+        protected final MultiComparator cmp;
+
+        public PriorityQueueComparator(MultiComparator cmp) {
+            this.cmp = cmp;
+        }
+
+        @Override
+        public int compare(PriorityQueueElement elementA, PriorityQueueElement elementB) {
+            int result = cmp.compare(elementA.getTuple(), elementB.getTuple());
+            if (result != 0) {
+                return result;
+            }
+            if (elementA.getCursorIndex() > elementB.getCursorIndex()) {
+                return 1;
+            } else {
+                return -1;
+            }
+        }
+
+        public MultiComparator getMultiComparator() {
+            return cmp;
+        }
+    }
+
+    protected void setPriorityQueueComparator() {
+        if (pqCmp == null || cmp != pqCmp.getMultiComparator()) {
+            pqCmp = new PriorityQueueComparator(cmp);
+        }
+    }
+
+    protected int compare(MultiComparator cmp, ITupleReference tupleA, ITupleReference tupleB) {
+        return cmp.compare(tupleA, tupleB);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMOperationType.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMOperationType.java
new file mode 100644
index 0000000..981cefe
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMOperationType.java
@@ -0,0 +1,10 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+public enum LSMOperationType {
+    SEARCH,
+    MODIFICATION,
+    FORCE_MODIFICATION,
+    FLUSH,
+    MERGE,
+    NOOP
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMTreeIndexAccessor.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMTreeIndexAccessor.java
new file mode 100644
index 0000000..7cc29a5
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/LSMTreeIndexAccessor.java
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessorInternal;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+
+public abstract class LSMTreeIndexAccessor implements ILSMIndexAccessorInternal {
+    protected ILSMHarness lsmHarness;
+    protected ILSMIndexOperationContext ctx;
+
+    public LSMTreeIndexAccessor(ILSMHarness lsmHarness, ILSMIndexOperationContext ctx) {
+        this.lsmHarness = lsmHarness;
+        this.ctx = ctx;
+    }
+
+    @Override
+    public void insert(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.INSERT);
+        lsmHarness.modify(ctx, false, tuple);
+    }
+
+    @Override
+    public void update(ITupleReference tuple) throws HyracksDataException, IndexException {
+        // Update is the same as insert.
+        ctx.setOperation(IndexOperation.UPDATE);
+        lsmHarness.modify(ctx, false, tuple);
+    }
+
+    @Override
+    public void delete(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.DELETE);
+        lsmHarness.modify(ctx, false, tuple);
+    }
+
+    @Override
+    public void upsert(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.UPSERT);
+        lsmHarness.modify(ctx, false, tuple);
+    }
+
+    @Override
+    public boolean tryInsert(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.INSERT);
+        return lsmHarness.modify(ctx, true, tuple);
+    }
+
+    @Override
+    public boolean tryDelete(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.DELETE);
+        return lsmHarness.modify(ctx, true, tuple);
+    }
+
+    @Override
+    public boolean tryUpdate(ITupleReference tuple) throws HyracksDataException, IndexException {
+        // Update is the same as insert.
+        ctx.setOperation(IndexOperation.UPDATE);
+        return lsmHarness.modify(ctx, true, tuple);
+    }
+
+    @Override
+    public boolean tryUpsert(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.UPSERT);
+        return lsmHarness.modify(ctx, true, tuple);
+    }
+
+    @Override
+    public void search(IIndexCursor cursor, ISearchPredicate searchPred) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.SEARCH);
+        lsmHarness.search(ctx, cursor, searchPred);
+    }
+
+    @Override
+    public void flush(ILSMIOOperation operation) throws HyracksDataException, IndexException {
+        lsmHarness.flush(ctx, operation);
+    }
+
+    @Override
+    public void merge(ILSMIOOperation operation) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.MERGE);
+        lsmHarness.merge(ctx, operation);
+    }
+
+    @Override
+    public void physicalDelete(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.PHYSICALDELETE);
+        lsmHarness.modify(ctx, false, tuple);
+    }
+
+    @Override
+    public void scheduleFlush(ILSMIOOperationCallback callback) throws HyracksDataException {
+        ctx.setOperation(IndexOperation.FLUSH);
+        lsmHarness.scheduleFlush(ctx, callback);
+    }
+
+    @Override
+    public void scheduleMerge(ILSMIOOperationCallback callback) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.MERGE);
+        lsmHarness.scheduleMerge(ctx, callback);
+    }
+
+    @Override
+    public void noOp() throws HyracksDataException {
+        lsmHarness.noOp(ctx);
+    }
+
+    @Override
+    public void forcePhysicalDelete(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.PHYSICALDELETE);
+        lsmHarness.forceModify(ctx, tuple);
+    }
+
+    @Override
+    public void forceInsert(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.INSERT);
+        lsmHarness.forceModify(ctx, tuple);
+    }
+
+    @Override
+    public void forceDelete(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.DELETE);
+        lsmHarness.forceModify(ctx, tuple);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/NoMergePolicy.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/NoMergePolicy.java
new file mode 100644
index 0000000..5d36c09
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/NoMergePolicy.java
@@ -0,0 +1,14 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+
+public enum NoMergePolicy implements ILSMMergePolicy {
+    INSTANCE;
+
+    @Override
+    public void diskComponentAdded(ILSMIndex index, int totalNumDiskComponents) {
+        // Do nothing
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/NoOpIOOperationCallback.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/NoOpIOOperationCallback.java
new file mode 100644
index 0000000..b123b30
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/NoOpIOOperationCallback.java
@@ -0,0 +1,34 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndex;
+
+public enum NoOpIOOperationCallback implements ILSMIOOperationCallback, ILSMIOOperationCallbackProvider {
+    INSTANCE;
+
+    @Override
+    public void beforeOperation() throws HyracksDataException {
+        // Do nothing.
+    }
+
+    @Override
+    public void afterOperation(List<ILSMComponent> oldComponents, ILSMComponent newComponent)
+            throws HyracksDataException {
+        // Do nothing.
+    }
+
+    @Override
+    public void afterFinalize(ILSMComponent newComponent) throws HyracksDataException {
+        // Do nothing.
+    }
+
+    @Override
+    public ILSMIOOperationCallback getIOOperationCallback(ILSMIndex index) {
+        return INSTANCE;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/NoOpOperationTrackerFactory.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/NoOpOperationTrackerFactory.java
new file mode 100644
index 0000000..97ec50e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/NoOpOperationTrackerFactory.java
@@ -0,0 +1,48 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTracker;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+
+/**
+ * Operation tracker that does nothing.
+ * WARNING: This op tracker should only be used for specific testing purposes.
+ * It is assumed than an op tracker cooperates with an lsm index to synchronize flushes with
+ * regular operations, and this implementation does no such tracking at all.
+ */
+public class NoOpOperationTrackerFactory implements ILSMOperationTrackerFactory {
+    private static final long serialVersionUID = 1L;
+
+    public static NoOpOperationTrackerFactory INSTANCE = new NoOpOperationTrackerFactory();
+
+    @Override
+    public ILSMOperationTracker createOperationTracker(ILSMIndex index) {
+        return new ILSMOperationTracker() {
+
+            @Override
+            public void completeOperation(LSMOperationType opType, ISearchOperationCallback searchCallback,
+                    IModificationOperationCallback modificationCallback) throws HyracksDataException {
+                // Do nothing.
+            }
+
+            @Override
+            public void beforeOperation(LSMOperationType opType, ISearchOperationCallback searchCallback,
+                    IModificationOperationCallback modificationCallback) throws HyracksDataException {
+            }
+
+            @Override
+            public void afterOperation(LSMOperationType opType, ISearchOperationCallback searchCallback,
+                    IModificationOperationCallback modificationCallback) throws HyracksDataException {
+                // Do nothing.                        
+            }
+        };
+    }
+
+    // Enforce singleton.
+    private NoOpOperationTrackerFactory() {
+    }
+
+};
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/SynchronousScheduler.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/SynchronousScheduler.java
new file mode 100644
index 0000000..9bbd394
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/SynchronousScheduler.java
@@ -0,0 +1,19 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+
+public enum SynchronousScheduler implements ILSMIOOperationScheduler {
+    INSTANCE;
+
+    @Override
+    public void scheduleOperation(ILSMIOOperation operation) throws HyracksDataException {
+        try {
+            operation.perform();
+        } catch (IndexException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/SynchronousSchedulerProvider.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/SynchronousSchedulerProvider.java
new file mode 100644
index 0000000..72d9d1d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/SynchronousSchedulerProvider.java
@@ -0,0 +1,15 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationSchedulerProvider;
+
+public enum SynchronousSchedulerProvider implements ILSMIOOperationSchedulerProvider {
+    INSTANCE;
+
+    @Override
+    public ILSMIOOperationScheduler getIOScheduler(IHyracksTaskContext ctx) {
+        return SynchronousScheduler.INSTANCE;
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/ThreadCountingOperationTrackerFactory.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/ThreadCountingOperationTrackerFactory.java
new file mode 100644
index 0000000..3b4b00f
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/ThreadCountingOperationTrackerFactory.java
@@ -0,0 +1,21 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTracker;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+
+public class ThreadCountingOperationTrackerFactory implements ILSMOperationTrackerFactory {
+
+    private static final long serialVersionUID = 1L;
+    
+    public static ThreadCountingOperationTrackerFactory INSTANCE = new ThreadCountingOperationTrackerFactory(); 
+    
+    @Override
+    public ILSMOperationTracker createOperationTracker(ILSMIndex index) {
+        return new ThreadCountingTracker(index);
+    }
+
+    // Enforce singleton.
+    private ThreadCountingOperationTrackerFactory() {
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/ThreadCountingTracker.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/ThreadCountingTracker.java
new file mode 100644
index 0000000..5dfa94e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/ThreadCountingTracker.java
@@ -0,0 +1,49 @@
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTracker;
+
+public class ThreadCountingTracker implements ILSMOperationTracker {
+    private final AtomicInteger threadRefCount;
+    private final ILSMIndex index;
+
+    public ThreadCountingTracker(ILSMIndex index) {
+        this.index = index;
+        this.threadRefCount = new AtomicInteger();
+    }
+
+    @Override
+    public void beforeOperation(LSMOperationType opType, ISearchOperationCallback searchCallback,
+            IModificationOperationCallback modificationCallback) throws HyracksDataException {
+        if (opType == LSMOperationType.MODIFICATION) {
+            threadRefCount.incrementAndGet();
+        }
+    }
+
+    @Override
+    public void afterOperation(LSMOperationType opType, ISearchOperationCallback searchCallback,
+            IModificationOperationCallback modificationCallback) throws HyracksDataException {
+        // The operation is considered inactive, immediately after leaving the index.
+        completeOperation(opType, searchCallback, modificationCallback);
+    }
+
+    @Override
+    public void completeOperation(LSMOperationType opType, ISearchOperationCallback searchCallback,
+            IModificationOperationCallback modificationCallback) throws HyracksDataException {
+        // Flush will only be handled by last exiting thread.
+        if (opType == LSMOperationType.MODIFICATION) {
+            if (threadRefCount.decrementAndGet() == 0 && index.getFlushStatus()) {
+                ILSMIndexAccessor accessor = (ILSMIndexAccessor) index.createAccessor(NoOpOperationCallback.INSTANCE,
+                        NoOpOperationCallback.INSTANCE);
+                accessor.scheduleFlush(NoOpIOOperationCallback.INSTANCE);
+            }
+        }
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/TreeIndexFactory.java b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/TreeIndexFactory.java
new file mode 100644
index 0000000..f570058
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-common/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/common/impls/TreeIndexFactory.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common.impls;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManagerFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public abstract class TreeIndexFactory<T extends ITreeIndex> extends IndexFactory<T> {
+
+    protected final ITreeIndexFrameFactory interiorFrameFactory;
+    protected final ITreeIndexFrameFactory leafFrameFactory;
+    protected final IBinaryComparatorFactory[] cmpFactories;
+    protected final int fieldCount;
+
+    public TreeIndexFactory(IBufferCache bufferCache, IFileMapProvider fileMapProvider,
+            IFreePageManagerFactory freePageManagerFactory, ITreeIndexFrameFactory interiorFrameFactory,
+            ITreeIndexFrameFactory leafFrameFactory, IBinaryComparatorFactory[] cmpFactories, int fieldCount) {
+        super(bufferCache, fileMapProvider, freePageManagerFactory);
+        this.interiorFrameFactory = interiorFrameFactory;
+        this.leafFrameFactory = leafFrameFactory;
+        this.cmpFactories = cmpFactories;
+        this.fieldCount = fieldCount;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/pom.xml b/hyracks/hyracks-storage-am-lsm-invertedindex/pom.xml
new file mode 100644
index 0000000..1aa5302
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/pom.xml
@@ -0,0 +1,41 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<artifactId>hyracks-storage-am-lsm-invertedindex</artifactId>
+
+	<parent>
+		<artifactId>hyracks</artifactId>
+		<groupId>edu.uci.ics.hyracks</groupId>
+		<version>0.2.5-SNAPSHOT</version>
+		<relativePath>..</relativePath>
+	</parent>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>2.0.2</version>
+				<configuration>
+					<source>1.7</source>
+					<target>1.7</target>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+	<dependencies>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-storage-am-btree</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-storage-am-lsm-common</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+	    </dependency>
+	</dependencies>
+</project>
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndex.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndex.java
new file mode 100644
index 0000000..2556a25
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndex.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+
+public interface IInvertedIndex extends IIndex {
+    public IInvertedListCursor createInvertedListCursor();
+    
+    public void openInvertedListCursor(IInvertedListCursor listCursor, ITupleReference searchKey, IIndexOperationContext ictx)
+            throws HyracksDataException, IndexException;
+    
+    public ITypeTraits[] getInvListTypeTraits();
+    
+    public IBinaryComparatorFactory[] getInvListCmpFactories();    
+    
+    public ITypeTraits[] getTokenTypeTraits();
+    
+    public IBinaryComparatorFactory[] getTokenCmpFactories();
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexAccessor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexAccessor.java
new file mode 100644
index 0000000..3fe5b57
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexAccessor.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+
+public interface IInvertedIndexAccessor extends IIndexAccessor {
+    public IInvertedListCursor createInvertedListCursor();
+
+    public void openInvertedListCursor(IInvertedListCursor listCursor, ITupleReference searchKey)
+            throws HyracksDataException, IndexException;
+
+    public IIndexCursor createRangeSearchCursor();
+
+    public void rangeSearch(IIndexCursor cursor, ISearchPredicate searchPred) throws IndexException,
+            HyracksDataException;
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexFileNameMapper.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexFileNameMapper.java
new file mode 100644
index 0000000..d7ec129
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexFileNameMapper.java
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api;
+
+/**
+ * Maps from the dictionary BTree file/path to a corresponding inverted-lists file/path.
+ */
+public interface IInvertedIndexFileNameMapper {
+    public String getInvListsFilePath(String dictBTreeFilePath);
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexOperatorDescriptor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexOperatorDescriptor.java
new file mode 100644
index 0000000..60d1b03
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexOperatorDescriptor.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+
+public interface IInvertedIndexOperatorDescriptor extends IIndexOperatorDescriptor {
+    
+    public ITypeTraits[] getInvListsTypeTraits();
+    
+    public IBinaryComparatorFactory[] getInvListsComparatorFactories();
+    
+    public ITypeTraits[] getTokenTypeTraits();
+    
+    public IBinaryComparatorFactory[] getTokenComparatorFactories();
+
+    public IBinaryTokenizerFactory getTokenizerFactory();        
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexSearchModifier.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexSearchModifier.java
new file mode 100644
index 0000000..0d0d936
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexSearchModifier.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api;
+
+public interface IInvertedIndexSearchModifier {
+    public int getOccurrenceThreshold(int numQueryTokens);
+
+    public int getNumPrefixLists(int occurrenceThreshold, int numInvLists);
+
+    public short getNumTokensLowerBound(short numQueryTokens);
+
+    public short getNumTokensUpperBound(short numQueryTokens);
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexSearchModifierFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexSearchModifierFactory.java
new file mode 100644
index 0000000..180f491
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexSearchModifierFactory.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api;
+
+import java.io.Serializable;
+
+public interface IInvertedIndexSearchModifierFactory extends Serializable {
+    public IInvertedIndexSearchModifier createSearchModifier();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexSearcher.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexSearcher.java
new file mode 100644
index 0000000..0ea9383
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedIndexSearcher.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api;
+
+import java.nio.ByteBuffer;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.OnDiskInvertedIndexSearchCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.InvertedIndexSearchPredicate;
+
+public interface IInvertedIndexSearcher {
+    public void search(OnDiskInvertedIndexSearchCursor resultCursor, InvertedIndexSearchPredicate searchPred, IIndexOperationContext ictx)
+            throws HyracksDataException, IndexException;
+
+    public IFrameTupleAccessor createResultFrameTupleAccessor();
+
+    public ITupleReference createResultFrameTupleReference();
+
+    public List<ByteBuffer> getResultBuffers();
+
+    public int getNumValidResultBuffers();
+    
+    public void reset();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedListBuilder.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedListBuilder.java
new file mode 100644
index 0000000..dcb5fdd
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedListBuilder.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api;
+
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+
+public interface IInvertedListBuilder {
+    public boolean startNewList(ITupleReference tuple, int numTokenFields);
+
+    // returns true if successfully appended
+    // returns false if not enough space in targetBuf
+    public boolean appendElement(ITupleReference tuple, int numTokenFields, int numElementFields);
+
+    public void setTargetBuffer(byte[] targetBuf, int startPos);
+
+    public int getListSize();
+
+    public int getPos();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedListBuilderFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedListBuilderFactory.java
new file mode 100644
index 0000000..9cde18b
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedListBuilderFactory.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api;
+
+public interface IInvertedListBuilderFactory {
+    public IInvertedListBuilder create();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedListCursor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedListCursor.java
new file mode 100644
index 0000000..de703ac
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IInvertedListCursor.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+
+public interface IInvertedListCursor extends Comparable<IInvertedListCursor> {
+    public void reset(int startPageId, int endPageId, int startOff, int numElements);
+
+    public void pinPages() throws HyracksDataException, IndexException;
+
+    public void unpinPages() throws HyracksDataException;
+
+    public boolean hasNext() throws HyracksDataException, IndexException;
+
+    public void next() throws HyracksDataException;
+
+    public ITupleReference getTuple();
+
+    // getters
+    public int size();
+
+    public int getStartPageId();
+
+    public int getEndPageId();
+
+    public int getStartOff();
+
+    public boolean containsKey(ITupleReference searchTuple, MultiComparator invListCmp) throws HyracksDataException, IndexException;
+    
+    // for debugging
+    @SuppressWarnings("rawtypes")
+    public String printInvList(ISerializerDeserializer[] serdes) throws HyracksDataException, IndexException;
+
+    @SuppressWarnings("rawtypes")
+    public String printCurrentElement(ISerializerDeserializer[] serdes) throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IObjectFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IObjectFactory.java
new file mode 100644
index 0000000..9068a2b
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IObjectFactory.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api;
+
+public interface IObjectFactory<T> {
+    public T create();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IPartitionedInvertedIndex.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IPartitionedInvertedIndex.java
new file mode 100644
index 0000000..89fd69d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/api/IPartitionedInvertedIndex.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api;
+
+import java.util.ArrayList;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.InvertedListPartitions;
+
+public interface IPartitionedInvertedIndex {
+    public boolean openInvertedListPartitionCursors(IInvertedIndexSearcher searcher, IIndexOperationContext ictx,
+            short numTokensLowerBound, short numTokensUpperBound, InvertedListPartitions invListPartitions,
+            ArrayList<IInvertedListCursor> cursorsOrderedByTokens) throws HyracksDataException, IndexException;
+
+    public boolean isEmpty();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/AbstractLSMInvertedIndexOperatorDescriptor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/AbstractLSMInvertedIndexOperatorDescriptor.java
new file mode 100644
index 0000000..e0af36e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/AbstractLSMInvertedIndexOperatorDescriptor.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceFactoryProvider;
+
+public abstract class AbstractLSMInvertedIndexOperatorDescriptor extends AbstractIndexOperatorDescriptor implements
+        IInvertedIndexOperatorDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    protected final ITypeTraits[] invListsTypeTraits;
+    protected final IBinaryComparatorFactory[] invListComparatorFactories;
+    protected final ITypeTraits[] tokenTypeTraits;
+    protected final IBinaryComparatorFactory[] tokenComparatorFactories;
+    protected final IBinaryTokenizerFactory tokenizerFactory;
+
+    public AbstractLSMInvertedIndexOperatorDescriptor(IOperatorDescriptorRegistry spec, int inputArity,
+            int outputArity, RecordDescriptor recDesc, IStorageManagerInterface storageManager,
+            IFileSplitProvider fileSplitProvider, IIndexLifecycleManagerProvider lifecycleManagerProvider,
+            ITypeTraits[] tokenTypeTraits, IBinaryComparatorFactory[] tokenComparatorFactories,
+            ITypeTraits[] invListsTypeTraits, IBinaryComparatorFactory[] invListComparatorFactories,
+            IBinaryTokenizerFactory tokenizerFactory, IIndexDataflowHelperFactory dataflowHelperFactory,
+            ITupleFilterFactory tupleFilterFactory, boolean retainInput,
+            ILocalResourceFactoryProvider localResourceFactoryProvider,
+            ISearchOperationCallbackFactory searchOpCallbackFactory,
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
+        super(spec, inputArity, outputArity, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider,
+                dataflowHelperFactory, tupleFilterFactory, retainInput, localResourceFactoryProvider,
+                searchOpCallbackFactory, modificationOpCallbackFactory);
+        this.invListsTypeTraits = invListsTypeTraits;
+        this.invListComparatorFactories = invListComparatorFactories;
+        this.tokenTypeTraits = tokenTypeTraits;
+        this.tokenComparatorFactories = tokenComparatorFactories;
+        this.tokenizerFactory = tokenizerFactory;
+    }
+
+    @Override
+    public IBinaryComparatorFactory[] getTokenComparatorFactories() {
+        return tokenComparatorFactories;
+    }
+
+    @Override
+    public ITypeTraits[] getTokenTypeTraits() {
+        return tokenTypeTraits;
+    }
+
+    @Override
+    public IBinaryComparatorFactory[] getInvListsComparatorFactories() {
+        return invListComparatorFactories;
+    }
+
+    @Override
+    public IBinaryTokenizerFactory getTokenizerFactory() {
+        return tokenizerFactory;
+    }
+
+    @Override
+    public ITypeTraits[] getInvListsTypeTraits() {
+        return invListsTypeTraits;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/BinaryTokenizerOperatorDescriptor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/BinaryTokenizerOperatorDescriptor.java
new file mode 100644
index 0000000..84152d5
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/BinaryTokenizerOperatorDescriptor.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
+import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
+import edu.uci.ics.hyracks.dataflow.std.base.AbstractSingleActivityOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+
+public class BinaryTokenizerOperatorDescriptor extends AbstractSingleActivityOperatorDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    private final IBinaryTokenizerFactory tokenizerFactory;
+    // Field that will be tokenized.
+    private final int docField;
+    // operator will append these key fields to each token, e.g., as
+    // payload for an inverted list
+    // WARNING: too many key fields can cause significant data blowup.
+    private final int[] keyFields;
+    // Indicates whether the first key field should be the number of tokens in the tokenized set of the document.
+    // This value is used in partitioned inverted indexes, for example.
+    private final boolean addNumTokensKey;
+
+    public BinaryTokenizerOperatorDescriptor(IOperatorDescriptorRegistry spec, RecordDescriptor recDesc,
+            IBinaryTokenizerFactory tokenizerFactory, int docField, int[] keyFields, boolean addNumTokensKey) {
+        super(spec, 1, 1);
+        this.tokenizerFactory = tokenizerFactory;
+        this.docField = docField;
+        this.keyFields = keyFields;
+        this.addNumTokensKey = addNumTokensKey;
+        recordDescriptors[0] = recDesc;
+    }
+
+    @Override
+    public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
+            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException {
+        return new BinaryTokenizerOperatorNodePushable(ctx, recordDescProvider.getInputRecordDescriptor(
+                getActivityId(), 0), recordDescriptors[0], tokenizerFactory.createTokenizer(), docField, keyFields,
+                addNumTokensKey);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/BinaryTokenizerOperatorNodePushable.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/BinaryTokenizerOperatorNodePushable.java
new file mode 100644
index 0000000..6f28f61
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/BinaryTokenizerOperatorNodePushable.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.util.GrowableArray;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
+import edu.uci.ics.hyracks.dataflow.common.comm.util.FrameUtils;
+import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputUnaryOutputOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizer;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IToken;
+
+public class BinaryTokenizerOperatorNodePushable extends AbstractUnaryInputUnaryOutputOperatorNodePushable {
+
+    private final IHyracksTaskContext ctx;
+    private final IBinaryTokenizer tokenizer;
+    private final int docField;
+    private final int[] keyFields;
+    private final boolean addNumTokensKey;
+    private final RecordDescriptor inputRecDesc;
+    private final RecordDescriptor outputRecDesc;
+
+    private FrameTupleAccessor accessor;
+    private ArrayTupleBuilder builder;
+    private GrowableArray builderData;
+    private FrameTupleAppender appender;
+    private ByteBuffer writeBuffer;
+
+    public BinaryTokenizerOperatorNodePushable(IHyracksTaskContext ctx, RecordDescriptor inputRecDesc,
+            RecordDescriptor outputRecDesc, IBinaryTokenizer tokenizer, int docField, int[] keyFields,
+            boolean addNumTokensKey) {
+        this.ctx = ctx;
+        this.tokenizer = tokenizer;
+        this.docField = docField;
+        this.keyFields = keyFields;
+        this.addNumTokensKey = addNumTokensKey;
+        this.inputRecDesc = inputRecDesc;
+        this.outputRecDesc = outputRecDesc;
+    }
+
+    @Override
+    public void open() throws HyracksDataException {
+        accessor = new FrameTupleAccessor(ctx.getFrameSize(), inputRecDesc);
+        writeBuffer = ctx.allocateFrame();
+        builder = new ArrayTupleBuilder(outputRecDesc.getFieldCount());
+        builderData = builder.getFieldData();
+        appender = new FrameTupleAppender(ctx.getFrameSize());
+        appender.reset(writeBuffer, true);
+        writer.open();
+    }
+
+    @Override
+    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+        accessor.reset(buffer);
+        int tupleCount = accessor.getTupleCount();
+        for (int i = 0; i < tupleCount; i++) {
+            short numTokens = 0;
+            if (addNumTokensKey) {
+                // Run through the tokens to get the total number of tokens.
+                tokenizer.reset(
+                        accessor.getBuffer().array(),
+                        accessor.getTupleStartOffset(i) + accessor.getFieldSlotsLength()
+                                + accessor.getFieldStartOffset(i, docField), accessor.getFieldLength(i, docField));
+                while (tokenizer.hasNext()) {
+                    tokenizer.next();
+                    numTokens++;
+                }
+            }
+
+            tokenizer.reset(
+                    accessor.getBuffer().array(),
+                    accessor.getTupleStartOffset(i) + accessor.getFieldSlotsLength()
+                            + accessor.getFieldStartOffset(i, docField), accessor.getFieldLength(i, docField));
+            while (tokenizer.hasNext()) {
+                tokenizer.next();
+
+                builder.reset();
+                try {
+                    IToken token = tokenizer.getToken();
+                    token.serializeToken(builderData);
+                    builder.addFieldEndOffset();
+                    // Add number of tokens if requested.
+                    if (addNumTokensKey) {
+                        builder.getDataOutput().writeShort(numTokens);
+                        builder.addFieldEndOffset();
+                    }
+                } catch (IOException e) {
+                    throw new HyracksDataException(e.getMessage());
+                }
+
+                for (int k = 0; k < keyFields.length; k++) {
+                    builder.addField(accessor, i, keyFields[k]);
+                }
+
+                if (!appender.append(builder.getFieldEndOffsets(), builder.getByteArray(), 0, builder.getSize())) {
+                    FrameUtils.flushFrame(writeBuffer, writer);
+                    appender.reset(writeBuffer, true);
+                    if (!appender.append(builder.getFieldEndOffsets(), builder.getByteArray(), 0, builder.getSize())) {
+                        throw new IllegalStateException();
+                    }
+                }
+            }
+        }
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        if (appender.getTupleCount() > 0) {
+            FrameUtils.flushFrame(writeBuffer, writer);
+        }
+        writer.close();
+    }
+
+    @Override
+    public void fail() throws HyracksDataException {
+        writer.fail();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexBulkLoadOperatorDescriptor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexBulkLoadOperatorDescriptor.java
new file mode 100644
index 0000000..da3cad5
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexBulkLoadOperatorDescriptor.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexBulkLoadOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
+
+public class LSMInvertedIndexBulkLoadOperatorDescriptor extends AbstractLSMInvertedIndexOperatorDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    private final int[] fieldPermutation;
+    private final boolean verifyInput;
+    private final long numElementsHint;
+
+    public LSMInvertedIndexBulkLoadOperatorDescriptor(IOperatorDescriptorRegistry spec, int[] fieldPermutation,
+            boolean verifyInput, long numElementsHint, IStorageManagerInterface storageManager,
+            IFileSplitProvider fileSplitProvider, IIndexLifecycleManagerProvider lifecycleManagerProvider,
+            ITypeTraits[] tokenTypeTraits, IBinaryComparatorFactory[] tokenComparatorFactories,
+            ITypeTraits[] invListsTypeTraits, IBinaryComparatorFactory[] invListComparatorFactories,
+            IBinaryTokenizerFactory tokenizerFactory, IIndexDataflowHelperFactory invertedIndexDataflowHelperFactory,
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
+        super(spec, 1, 0, null, storageManager, fileSplitProvider, lifecycleManagerProvider, tokenTypeTraits,
+                tokenComparatorFactories, invListsTypeTraits, invListComparatorFactories, tokenizerFactory,
+                invertedIndexDataflowHelperFactory, null, false, NoOpLocalResourceFactoryProvider.INSTANCE,
+                NoOpOperationCallbackFactory.INSTANCE, modificationOpCallbackFactory);
+        this.fieldPermutation = fieldPermutation;
+        this.verifyInput = verifyInput;
+        this.numElementsHint = numElementsHint;
+    }
+
+    @Override
+    public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
+            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
+        return new IndexBulkLoadOperatorNodePushable(this, ctx, partition, fieldPermutation, 1.0f, verifyInput,
+                numElementsHint, recordDescProvider);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexCreateOperatorDescriptor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexCreateOperatorDescriptor.java
new file mode 100644
index 0000000..641878f
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexCreateOperatorDescriptor.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexCreateOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceFactoryProvider;
+
+public class LSMInvertedIndexCreateOperatorDescriptor extends AbstractLSMInvertedIndexOperatorDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    public LSMInvertedIndexCreateOperatorDescriptor(IOperatorDescriptorRegistry spec,
+            IStorageManagerInterface storageManager, IFileSplitProvider fileSplitProvider,
+            IIndexLifecycleManagerProvider lifecycleManagerProvider, ITypeTraits[] tokenTypeTraits,
+            IBinaryComparatorFactory[] tokenComparatorFactories, ITypeTraits[] invListsTypeTraits,
+            IBinaryComparatorFactory[] invListComparatorFactories, IBinaryTokenizerFactory tokenizerFactory,
+            IIndexDataflowHelperFactory btreeDataflowHelperFactory,
+            ILocalResourceFactoryProvider localResourceFactoryProvider,
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
+        super(spec, 0, 0, null, storageManager, fileSplitProvider, lifecycleManagerProvider, tokenTypeTraits,
+                tokenComparatorFactories, invListsTypeTraits, invListComparatorFactories, tokenizerFactory,
+                btreeDataflowHelperFactory, null, false, localResourceFactoryProvider,
+                NoOpOperationCallbackFactory.INSTANCE, modificationOpCallbackFactory);
+    }
+
+    @Override
+    public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
+            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
+        return new IndexCreateOperatorNodePushable(this, ctx, partition);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexDataflowHelper.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexDataflowHelper.java
new file mode 100644
index 0000000..3d8b391
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexDataflowHelper.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.dataflow.AbstractLSMIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.DualIndexInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.DualIndexInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls.LSMInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.InvertedIndexUtils;
+import edu.uci.ics.hyracks.storage.common.buffercache.HeapBufferAllocator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public final class LSMInvertedIndexDataflowHelper extends AbstractLSMIndexDataflowHelper {
+
+    public LSMInvertedIndexDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
+        this(opDesc, ctx, partition, DEFAULT_MEM_PAGE_SIZE, DEFAULT_MEM_NUM_PAGES, mergePolicy, opTrackerFactory,
+                ioScheduler, ioOpCallbackProvider);
+    }
+
+    public LSMInvertedIndexDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition,
+            int memPageSize, int memNumPages, ILSMMergePolicy mergePolicy,
+            ILSMOperationTrackerFactory opTrackerFactory, ILSMIOOperationScheduler ioScheduler,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
+        super(opDesc, ctx, partition, memPageSize, memNumPages, mergePolicy, opTrackerFactory, ioScheduler,
+                ioOpCallbackProvider);
+    }
+
+    @Override
+    public IIndex createIndexInstance() throws HyracksDataException {
+        IInvertedIndexOperatorDescriptor invIndexOpDesc = (IInvertedIndexOperatorDescriptor) opDesc;
+        try {
+            ITreeIndexMetaDataFrameFactory metaDataFrameFactory = new LIFOMetaDataFrameFactory();
+            IInMemoryBufferCache memBufferCache = new DualIndexInMemoryBufferCache(new HeapBufferAllocator(),
+                    memPageSize, memNumPages);
+            IInMemoryFreePageManager memFreePageManager = new DualIndexInMemoryFreePageManager(memNumPages,
+                    metaDataFrameFactory);
+            IBufferCache diskBufferCache = opDesc.getStorageManager().getBufferCache(ctx);
+            IFileMapProvider diskFileMapProvider = opDesc.getStorageManager().getFileMapProvider(ctx);
+            LSMInvertedIndex invIndex = InvertedIndexUtils.createLSMInvertedIndex(memBufferCache, memFreePageManager,
+                    diskFileMapProvider, invIndexOpDesc.getInvListsTypeTraits(),
+                    invIndexOpDesc.getInvListsComparatorFactories(), invIndexOpDesc.getTokenTypeTraits(),
+                    invIndexOpDesc.getTokenComparatorFactories(), invIndexOpDesc.getTokenizerFactory(),
+                    diskBufferCache, ctx.getIOManager(), file.getFile().getPath(), mergePolicy, opTrackerFactory,
+                    ioScheduler, ioOpCallbackProvider, partition);
+            return invIndex;
+        } catch (IndexException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexDataflowHelperFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexDataflowHelperFactory.java
new file mode 100644
index 0000000..9796ebc
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexDataflowHelperFactory.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationSchedulerProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicyProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.dataflow.AbstractLSMIndexDataflowHelperFactory;
+
+public class LSMInvertedIndexDataflowHelperFactory extends AbstractLSMIndexDataflowHelperFactory {
+
+    private static final long serialVersionUID = 1L;
+
+    public LSMInvertedIndexDataflowHelperFactory(ILSMMergePolicyProvider mergePolicyProvider,
+            ILSMOperationTrackerFactory opTrackerProvider, ILSMIOOperationSchedulerProvider ioSchedulerProvider,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider, int memPageSize, int memNumPages) {
+        super(mergePolicyProvider, opTrackerProvider, ioSchedulerProvider, ioOpCallbackProvider, memPageSize,
+                memNumPages);
+    }
+
+    @Override
+    public IndexDataflowHelper createIndexDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
+            int partition) {
+        return new LSMInvertedIndexDataflowHelper(opDesc, ctx, partition, memPageSize, memNumPages, mergePolicyProvider.getMergePolicy(ctx),
+                opTrackerFactory, ioSchedulerProvider.getIOScheduler(ctx), ioOpCallbackProvider);
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexInsertUpdateDeleteOperator.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexInsertUpdateDeleteOperator.java
new file mode 100644
index 0000000..3122aa0
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexInsertUpdateDeleteOperator.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.dataflow.LSMIndexInsertUpdateDeleteOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
+
+public class LSMInvertedIndexInsertUpdateDeleteOperator extends AbstractLSMInvertedIndexOperatorDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    private final int[] fieldPermutation;
+    private final IndexOperation op;
+
+    public LSMInvertedIndexInsertUpdateDeleteOperator(IOperatorDescriptorRegistry spec, RecordDescriptor recDesc,
+            IStorageManagerInterface storageManager, IFileSplitProvider fileSplitProvider,
+            IIndexLifecycleManagerProvider lifecycleManagerProvider, ITypeTraits[] tokenTypeTraits,
+            IBinaryComparatorFactory[] tokenComparatorFactories, ITypeTraits[] invListsTypeTraits,
+            IBinaryComparatorFactory[] invListComparatorFactories, IBinaryTokenizerFactory tokenizerFactory,
+            int[] fieldPermutation, IndexOperation op, IIndexDataflowHelperFactory dataflowHelperFactory,
+            ITupleFilterFactory tupleFilterFactory, IModificationOperationCallbackFactory modificationOpCallbackFactory) {
+        super(spec, 1, 1, recDesc, storageManager, fileSplitProvider, lifecycleManagerProvider, tokenTypeTraits,
+                tokenComparatorFactories, invListsTypeTraits, invListComparatorFactories, tokenizerFactory,
+                dataflowHelperFactory, tupleFilterFactory, false, NoOpLocalResourceFactoryProvider.INSTANCE,
+                NoOpOperationCallbackFactory.INSTANCE, modificationOpCallbackFactory);
+        this.fieldPermutation = fieldPermutation;
+        this.op = op;
+    }
+
+    @Override
+    public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
+            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
+        return new LSMIndexInsertUpdateDeleteOperatorNodePushable(this, ctx, partition, fieldPermutation,
+                recordDescProvider, op);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexSearchOperatorDescriptor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexSearchOperatorDescriptor.java
new file mode 100644
index 0000000..4f97060
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexSearchOperatorDescriptor.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
+import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifierFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
+
+public class LSMInvertedIndexSearchOperatorDescriptor extends AbstractLSMInvertedIndexOperatorDescriptor {
+    private static final long serialVersionUID = 1L;
+
+    private final int queryField;
+    private final IInvertedIndexSearchModifierFactory searchModifierFactory;
+
+    public LSMInvertedIndexSearchOperatorDescriptor(IOperatorDescriptorRegistry spec, int queryField,
+            IStorageManagerInterface storageManager, IFileSplitProvider fileSplitProvider,
+            IIndexLifecycleManagerProvider lifecycleManagerProvider, ITypeTraits[] tokenTypeTraits,
+            IBinaryComparatorFactory[] tokenComparatorFactories, ITypeTraits[] invListsTypeTraits,
+            IBinaryComparatorFactory[] invListComparatorFactories,
+            IIndexDataflowHelperFactory btreeDataflowHelperFactory, IBinaryTokenizerFactory queryTokenizerFactory,
+            IInvertedIndexSearchModifierFactory searchModifierFactory, RecordDescriptor recDesc, boolean retainInput,
+            ISearchOperationCallbackFactory searchOpCallbackProvider) {
+        super(spec, 1, 1, recDesc, storageManager, fileSplitProvider, lifecycleManagerProvider, tokenTypeTraits,
+                tokenComparatorFactories, invListsTypeTraits, invListComparatorFactories, queryTokenizerFactory,
+                btreeDataflowHelperFactory, null, retainInput, NoOpLocalResourceFactoryProvider.INSTANCE,
+                searchOpCallbackProvider, NoOpOperationCallbackFactory.INSTANCE);
+        this.queryField = queryField;
+        this.searchModifierFactory = searchModifierFactory;
+    }
+
+    @Override
+    public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
+            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException {
+        IInvertedIndexSearchModifier searchModifier = searchModifierFactory.createSearchModifier();
+        return new LSMInvertedIndexSearchOperatorNodePushable(this, ctx, partition, recordDescProvider, queryField,
+                searchModifier);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexSearchOperatorNodePushable.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexSearchOperatorNodePushable.java
new file mode 100644
index 0000000..d825c02
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexSearchOperatorNodePushable.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexSearchOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.InvertedIndexSearchPredicate;
+
+public class LSMInvertedIndexSearchOperatorNodePushable extends IndexSearchOperatorNodePushable {
+
+    protected final IInvertedIndexSearchModifier searchModifier;
+    protected final int queryFieldIndex;
+    protected final int invListFields;
+
+    public LSMInvertedIndexSearchOperatorNodePushable(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
+            int partition, IRecordDescriptorProvider recordDescProvider, int queryFieldIndex,
+            IInvertedIndexSearchModifier searchModifier) {
+        super(opDesc, ctx, partition, recordDescProvider);
+        this.searchModifier = searchModifier;
+        this.queryFieldIndex = queryFieldIndex;
+        // If retainInput is true, the frameTuple is created in IndexSearchOperatorNodePushable.open().
+        if (!opDesc.getRetainInput()) {
+            this.frameTuple = new FrameTupleReference();
+        }
+        AbstractLSMInvertedIndexOperatorDescriptor invIndexOpDesc = (AbstractLSMInvertedIndexOperatorDescriptor) opDesc;
+        invListFields = invIndexOpDesc.getInvListsTypeTraits().length;
+    }
+
+    @Override
+    protected ISearchPredicate createSearchPredicate() {
+        AbstractLSMInvertedIndexOperatorDescriptor invIndexOpDesc = (AbstractLSMInvertedIndexOperatorDescriptor) opDesc;
+        return new InvertedIndexSearchPredicate(invIndexOpDesc.getTokenizerFactory().createTokenizer(), searchModifier);
+    }
+
+    @Override
+    protected void resetSearchPredicate(int tupleIndex) {
+        frameTuple.reset(accessor, tupleIndex);
+        InvertedIndexSearchPredicate invIndexSearchPred = (InvertedIndexSearchPredicate) searchPred;
+        invIndexSearchPred.setQueryTuple(frameTuple);
+        invIndexSearchPred.setQueryFieldIndex(queryFieldIndex);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/PartitionedLSMInvertedIndexDataflowHelper.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/PartitionedLSMInvertedIndexDataflowHelper.java
new file mode 100644
index 0000000..c5b4f07
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/PartitionedLSMInvertedIndexDataflowHelper.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.dataflow.AbstractLSMIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.DualIndexInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.DualIndexInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls.PartitionedLSMInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.InvertedIndexUtils;
+import edu.uci.ics.hyracks.storage.common.buffercache.HeapBufferAllocator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public final class PartitionedLSMInvertedIndexDataflowHelper extends AbstractLSMIndexDataflowHelper {
+
+    public PartitionedLSMInvertedIndexDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
+            int partition, ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
+        this(opDesc, ctx, partition, DEFAULT_MEM_PAGE_SIZE, DEFAULT_MEM_NUM_PAGES, mergePolicy, opTrackerFactory,
+                ioScheduler, ioOpCallbackProvider);
+    }
+
+    public PartitionedLSMInvertedIndexDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
+            int partition, int memPageSize, int memNumPages, ILSMMergePolicy mergePolicy,
+            ILSMOperationTrackerFactory opTrackerFactory, ILSMIOOperationScheduler ioScheduler,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
+        super(opDesc, ctx, partition, memPageSize, memNumPages, mergePolicy, opTrackerFactory, ioScheduler,
+                ioOpCallbackProvider);
+    }
+
+    @Override
+    public IIndex createIndexInstance() throws HyracksDataException {
+        IInvertedIndexOperatorDescriptor invIndexOpDesc = (IInvertedIndexOperatorDescriptor) opDesc;
+        try {
+            ITreeIndexMetaDataFrameFactory metaDataFrameFactory = new LIFOMetaDataFrameFactory();
+            IInMemoryBufferCache memBufferCache = new DualIndexInMemoryBufferCache(new HeapBufferAllocator(),
+                    memPageSize, memNumPages);
+            IInMemoryFreePageManager memFreePageManager = new DualIndexInMemoryFreePageManager(memNumPages,
+                    metaDataFrameFactory);
+            IBufferCache diskBufferCache = opDesc.getStorageManager().getBufferCache(ctx);
+            IFileMapProvider diskFileMapProvider = opDesc.getStorageManager().getFileMapProvider(ctx);
+            PartitionedLSMInvertedIndex invIndex = InvertedIndexUtils.createPartitionedLSMInvertedIndex(memBufferCache,
+                    memFreePageManager, diskFileMapProvider, invIndexOpDesc.getInvListsTypeTraits(),
+                    invIndexOpDesc.getInvListsComparatorFactories(), invIndexOpDesc.getTokenTypeTraits(),
+                    invIndexOpDesc.getTokenComparatorFactories(), invIndexOpDesc.getTokenizerFactory(),
+                    diskBufferCache, ctx.getIOManager(), file.getFile().getPath(), mergePolicy, opTrackerFactory,
+                    ioScheduler, ioOpCallbackProvider, partition);
+            return invIndex;
+        } catch (IndexException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/PartitionedLSMInvertedIndexDataflowHelperFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/PartitionedLSMInvertedIndexDataflowHelperFactory.java
new file mode 100644
index 0000000..8a8aad2
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/PartitionedLSMInvertedIndexDataflowHelperFactory.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationSchedulerProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicyProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.dataflow.AbstractLSMIndexDataflowHelperFactory;
+
+public class PartitionedLSMInvertedIndexDataflowHelperFactory extends AbstractLSMIndexDataflowHelperFactory {
+
+    private static final long serialVersionUID = 1L;
+
+    public PartitionedLSMInvertedIndexDataflowHelperFactory(ILSMMergePolicyProvider mergePolicyProvider,
+            ILSMOperationTrackerFactory opTrackerProvider, ILSMIOOperationSchedulerProvider ioSchedulerProvider,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider, int memPageSize, int memNumPages) {
+        super(mergePolicyProvider, opTrackerProvider, ioSchedulerProvider, ioOpCallbackProvider, memNumPages,
+                memNumPages);
+    }
+
+    @Override
+    public IndexDataflowHelper createIndexDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
+            int partition) {
+        return new PartitionedLSMInvertedIndexDataflowHelper(opDesc, ctx, partition, memPageSize, memNumPages,
+                mergePolicyProvider.getMergePolicy(ctx), opTrackerFactory, ioSchedulerProvider.getIOScheduler(ctx),
+                ioOpCallbackProvider);
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/exceptions/InvertedIndexException.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/exceptions/InvertedIndexException.java
new file mode 100644
index 0000000..cc7ff87
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/exceptions/InvertedIndexException.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.exceptions;
+
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+
+public class InvertedIndexException extends IndexException {
+    private static final long serialVersionUID = 1L;
+
+    public InvertedIndexException(Exception e) {        
+        super(e);
+    }
+    
+    public InvertedIndexException(String msg) {
+        super(msg);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/exceptions/OccurrenceThresholdPanicException.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/exceptions/OccurrenceThresholdPanicException.java
new file mode 100644
index 0000000..bedaa60
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/exceptions/OccurrenceThresholdPanicException.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.exceptions;
+
+
+
+public class OccurrenceThresholdPanicException extends InvertedIndexException {
+    private static final long serialVersionUID = 1L;
+
+    public OccurrenceThresholdPanicException(String msg) {
+        super(msg);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndex.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndex.java
new file mode 100644
index 0000000..33052f3
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndex.java
@@ -0,0 +1,735 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomCalculations;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilterFactory;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilterSpecification;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeDuplicateKeyException;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree.BTreeAccessor;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.btree.util.BTreeUtils;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponentFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessorInternal;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.InMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractLSMIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BTreeFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BlockingIOOperationCallbackWrapper;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory.InMemoryInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory.InMemoryInvertedIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.OnDiskInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.OnDiskInvertedIndexFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.InvertedIndexSearchPredicate;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.InvertedIndexUtils;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class LSMInvertedIndex extends AbstractLSMIndex implements IInvertedIndex {
+
+    // In-memory components.
+    protected final LSMInvertedIndexMutableComponent mutableComponent;
+    protected final IInMemoryFreePageManager memFreePageManager;
+    protected final IBinaryTokenizerFactory tokenizerFactory;
+
+    // On-disk components.
+    // For creating inverted indexes in flush and merge.
+    protected final ILSMComponentFactory componentFactory;
+
+    // Type traits and comparators for tokens and inverted-list elements.
+    protected final ITypeTraits[] invListTypeTraits;
+    protected final IBinaryComparatorFactory[] invListCmpFactories;
+    protected final ITypeTraits[] tokenTypeTraits;
+    protected final IBinaryComparatorFactory[] tokenCmpFactories;
+
+    public LSMInvertedIndex(IInMemoryBufferCache memBufferCache, IInMemoryFreePageManager memFreePageManager,
+            OnDiskInvertedIndexFactory diskInvIndexFactory, BTreeFactory deletedKeysBTreeFactory,
+            BloomFilterFactory bloomFilterFactory, ILSMIndexFileManager fileManager,
+            IFileMapProvider diskFileMapProvider, ITypeTraits[] invListTypeTraits,
+            IBinaryComparatorFactory[] invListCmpFactories, ITypeTraits[] tokenTypeTraits,
+            IBinaryComparatorFactory[] tokenCmpFactories, IBinaryTokenizerFactory tokenizerFactory,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider)
+            throws IndexException {
+        super(memFreePageManager, diskInvIndexFactory.getBufferCache(), fileManager, diskFileMapProvider, mergePolicy,
+                opTrackerFactory, ioScheduler, ioOpCallbackProvider);
+        this.memFreePageManager = memFreePageManager;
+        this.tokenizerFactory = tokenizerFactory;
+        this.invListTypeTraits = invListTypeTraits;
+        this.invListCmpFactories = invListCmpFactories;
+        this.tokenTypeTraits = tokenTypeTraits;
+        this.tokenCmpFactories = tokenCmpFactories;
+        // Create in-memory component.
+        InMemoryInvertedIndex memInvIndex = createInMemoryInvertedIndex(memBufferCache);
+        BTree deleteKeysBTree = BTreeUtils.createBTree(memBufferCache, memFreePageManager,
+                ((InMemoryBufferCache) memBufferCache).getFileMapProvider(), invListTypeTraits, invListCmpFactories,
+                BTreeLeafFrameType.REGULAR_NSM, new FileReference(new File("membtree")));
+        mutableComponent = new LSMInvertedIndexMutableComponent(memInvIndex, deleteKeysBTree, memFreePageManager);
+        componentFactory = new LSMInvertedIndexComponentFactory(diskInvIndexFactory, deletedKeysBTreeFactory,
+                bloomFilterFactory);
+    }
+
+    @Override
+    public synchronized void create() throws HyracksDataException {
+        if (isActivated) {
+            throw new HyracksDataException("Failed to create the index since it is activated.");
+        }
+
+        fileManager.deleteDirs();
+        fileManager.createDirs();
+        componentsRef.get().clear();
+    }
+
+    @Override
+    public synchronized void activate() throws HyracksDataException {
+        if (isActivated) {
+            return;
+        }
+        try {
+            List<ILSMComponent> immutableComponents = componentsRef.get();
+            ((InMemoryBufferCache) mutableComponent.getInvIndex().getBufferCache()).open();
+            mutableComponent.getInvIndex().create();
+            mutableComponent.getInvIndex().activate();
+            mutableComponent.getDeletedKeysBTree().create();
+            mutableComponent.getDeletedKeysBTree().activate();
+            immutableComponents.clear();
+            List<LSMComponentFileReferences> validFileReferences = fileManager.cleanupAndGetValidFiles();
+            for (LSMComponentFileReferences lsmComonentFileReference : validFileReferences) {
+                LSMInvertedIndexImmutableComponent component;
+                try {
+                    component = createDiskInvIndexComponent(componentFactory,
+                            lsmComonentFileReference.getInsertIndexFileReference(),
+                            lsmComonentFileReference.getDeleteIndexFileReference(),
+                            lsmComonentFileReference.getBloomFilterFileReference(), false);
+                } catch (IndexException e) {
+                    throw new HyracksDataException(e);
+                }
+                immutableComponents.add(component);
+            }
+            isActivated = true;
+            // TODO: Maybe we can make activate throw an index exception?
+        } catch (IndexException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public void clear() throws HyracksDataException {
+        if (!isActivated) {
+            throw new HyracksDataException("Failed to clear the index since it is not activated.");
+        }
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        mutableComponent.getInvIndex().clear();
+        mutableComponent.getDeletedKeysBTree().clear();
+        for (ILSMComponent c : immutableComponents) {
+            LSMInvertedIndexImmutableComponent component = (LSMInvertedIndexImmutableComponent) c;
+            component.getBloomFilter().deactivate();
+            component.getInvIndex().deactivate();
+            component.getDeletedKeysBTree().deactivate();
+            component.getBloomFilter().destroy();
+            component.getInvIndex().destroy();
+            component.getDeletedKeysBTree().destroy();
+        }
+        immutableComponents.clear();
+    }
+
+    @Override
+    public synchronized void deactivate(boolean flushOnExit) throws HyracksDataException {
+        if (!isActivated) {
+            return;
+        }
+
+        isActivated = false;
+
+        if (flushOnExit) {
+            BlockingIOOperationCallbackWrapper blockingCallBack = new BlockingIOOperationCallbackWrapper(
+                    ioOpCallbackProvider.getIOOperationCallback(this));
+            ILSMIndexAccessor accessor = (ILSMIndexAccessor) createAccessor(NoOpOperationCallback.INSTANCE,
+                    NoOpOperationCallback.INSTANCE);
+            accessor.scheduleFlush(blockingCallBack);
+            try {
+                blockingCallBack.waitForIO();
+            } catch (InterruptedException e) {
+                throw new HyracksDataException(e);
+            }
+        }
+
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        for (ILSMComponent c : immutableComponents) {
+            LSMInvertedIndexImmutableComponent component = (LSMInvertedIndexImmutableComponent) c;
+            component.getBloomFilter().deactivate();
+            component.getInvIndex().deactivate();
+            component.getDeletedKeysBTree().deactivate();
+        }
+        mutableComponent.getInvIndex().deactivate();
+        mutableComponent.getDeletedKeysBTree().deactivate();
+        mutableComponent.getInvIndex().destroy();
+        mutableComponent.getDeletedKeysBTree().destroy();
+        ((InMemoryBufferCache) mutableComponent.getInvIndex().getBufferCache()).close();
+    }
+
+    @Override
+    public synchronized void deactivate() throws HyracksDataException {
+        deactivate(true);
+    }
+
+    @Override
+    public synchronized void destroy() throws HyracksDataException {
+        if (isActivated) {
+            throw new HyracksDataException("Failed to destroy the index since it is activated.");
+        }
+
+        mutableComponent.getInvIndex().destroy();
+        mutableComponent.getDeletedKeysBTree().destroy();
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        for (ILSMComponent c : immutableComponents) {
+            LSMInvertedIndexImmutableComponent component = (LSMInvertedIndexImmutableComponent) c;
+            component.getInvIndex().destroy();
+            component.getDeletedKeysBTree().destroy();
+            component.getBloomFilter().destroy();
+        }
+        fileManager.deleteDirs();
+    }
+
+    @Override
+    public void getOperationalComponents(ILSMIndexOperationContext ctx) {
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        List<ILSMComponent> operationalComponents = ctx.getComponentHolder();
+        operationalComponents.clear();
+        switch (ctx.getOperation()) {
+            case FLUSH:
+            case DELETE:
+            case INSERT:
+                operationalComponents.add(mutableComponent);
+                break;
+            case SEARCH:
+                operationalComponents.add(mutableComponent);
+                operationalComponents.addAll(immutableComponents);
+                break;
+            case MERGE:
+                operationalComponents.addAll(immutableComponents);
+                break;
+            default:
+                throw new UnsupportedOperationException("Operation " + ctx.getOperation() + " not supported.");
+        }
+    }
+
+    /**
+     * The keys in the in-memory deleted-keys BTree only refer to on-disk components.
+     * We delete documents from the in-memory inverted index by deleting its entries directly,
+     * while still adding the deleted key to the deleted-keys BTree.
+     * Otherwise, inserts would have to remove keys from the in-memory deleted-keys BTree which
+     * may cause incorrect behavior (lost deletes) in the following pathological case:
+     * Insert doc 1, flush, delete doc 1, insert doc 1
+     * After the sequence above doc 1 will now appear twice because the delete of the on-disk doc 1 has been lost.
+     * Insert:
+     * - Insert document into in-memory inverted index.
+     * Delete:
+     * - Delete document from in-memory inverted index (ignore if it does not exist).
+     * - Insert key into deleted-keys BTree.
+     */
+    @Override
+    public void modify(IIndexOperationContext ictx, ITupleReference tuple) throws HyracksDataException, IndexException {
+        LSMInvertedIndexOpContext ctx = (LSMInvertedIndexOpContext) ictx;
+        // TODO: This is a hack to support logging properly in ASTERIX.
+        // The proper undo operations are only dependent on the after image so 
+        // it is correct to say we found nothing (null) as the before image (at least 
+        // in the perspective of ASTERIX). The semantics for the operation callbacks 
+        // are violated here (and they are somewhat unclear in the first place as to 
+        // what they should be for an inverted index).
+        ctx.modificationCallback.before(tuple);
+        ctx.modificationCallback.found(null, tuple);
+        switch (ctx.getOperation()) {
+            case INSERT: {
+                // Insert into the in-memory inverted index.                
+                ctx.memInvIndexAccessor.insert(tuple);
+                break;
+            }
+            case DELETE: {
+                // First remove all entries in the in-memory inverted index (if any).
+                ctx.memInvIndexAccessor.delete(tuple);
+                // Insert key into the deleted-keys BTree.
+                ctx.keysOnlyTuple.reset(tuple);
+                try {
+                    ctx.deletedKeysBTreeAccessor.insert(ctx.keysOnlyTuple);
+                } catch (BTreeDuplicateKeyException e) {
+                    // Key has already been deleted.
+                }
+                break;
+            }
+            default: {
+                throw new UnsupportedOperationException("Operation " + ctx.getOperation() + " not supported.");
+            }
+        }
+    }
+
+    @Override
+    public void search(ILSMIndexOperationContext ictx, IIndexCursor cursor, ISearchPredicate pred)
+            throws HyracksDataException, IndexException {
+        List<ILSMComponent> operationalComponents = ictx.getComponentHolder();
+        int numComponents = operationalComponents.size();
+        assert numComponents > 0;
+        boolean includeMutableComponent = operationalComponents.get(0) == mutableComponent;
+        ArrayList<IIndexAccessor> indexAccessors = new ArrayList<IIndexAccessor>(numComponents);
+        ArrayList<IIndexAccessor> deletedKeysBTreeAccessors = new ArrayList<IIndexAccessor>(numComponents);
+        if (includeMutableComponent) {
+            IIndexAccessor invIndexAccessor = mutableComponent.getInvIndex().createAccessor(
+                    NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            indexAccessors.add(invIndexAccessor);
+            IIndexAccessor deletedKeysAccessor = mutableComponent.getDeletedKeysBTree().createAccessor(
+                    NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            deletedKeysBTreeAccessors.add(deletedKeysAccessor);
+        }
+
+        for (int i = includeMutableComponent ? 1 : 0; i < operationalComponents.size(); i++) {
+            LSMInvertedIndexImmutableComponent component = (LSMInvertedIndexImmutableComponent) operationalComponents
+                    .get(i);
+            IIndexAccessor invIndexAccessor = component.getInvIndex().createAccessor(NoOpOperationCallback.INSTANCE,
+                    NoOpOperationCallback.INSTANCE);
+            indexAccessors.add(invIndexAccessor);
+            IIndexAccessor deletedKeysAccessor = component.getDeletedKeysBTree().createAccessor(
+                    NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            deletedKeysBTreeAccessors.add(deletedKeysAccessor);
+        }
+
+        ICursorInitialState initState = createCursorInitialState(pred, ictx, includeMutableComponent, indexAccessors,
+                deletedKeysBTreeAccessors);
+        cursor.open(initState, pred);
+    }
+
+    private ICursorInitialState createCursorInitialState(ISearchPredicate pred, IIndexOperationContext ictx,
+            boolean includeMutableComponent, ArrayList<IIndexAccessor> indexAccessors,
+            ArrayList<IIndexAccessor> deletedKeysBTreeAccessors) {
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        ICursorInitialState initState = null;
+        PermutingTupleReference keysOnlyTuple = createKeysOnlyTupleReference();
+        MultiComparator keyCmp = MultiComparator.createIgnoreFieldLength(invListCmpFactories);
+        List<ILSMComponent> operationalComponents = new ArrayList<ILSMComponent>();
+        if (includeMutableComponent) {
+            operationalComponents.add(mutableComponent);
+        }
+        operationalComponents.addAll(immutableComponents);
+
+        // TODO: This check is not pretty, but it does the job. Come up with something more OO in the future.
+        // Distinguish between regular searches and range searches (mostly used in merges).
+        if (pred instanceof InvertedIndexSearchPredicate) {
+            initState = new LSMInvertedIndexSearchCursorInitialState(keyCmp, keysOnlyTuple, indexAccessors,
+                    deletedKeysBTreeAccessors, mutableComponent.getDeletedKeysBTree().getLeafFrameFactory(), ictx,
+                    includeMutableComponent, lsmHarness, operationalComponents);
+        } else {
+            InMemoryInvertedIndex memInvIndex = (InMemoryInvertedIndex) mutableComponent.getInvIndex();
+            MultiComparator tokensAndKeysCmp = MultiComparator.create(memInvIndex.getBTree().getComparatorFactories());
+            initState = new LSMInvertedIndexRangeSearchCursorInitialState(tokensAndKeysCmp, keyCmp, keysOnlyTuple,
+                    mutableComponent.getDeletedKeysBTree().getLeafFrameFactory(), includeMutableComponent, lsmHarness,
+                    indexAccessors, deletedKeysBTreeAccessors, pred, operationalComponents);
+        }
+        return initState;
+    }
+
+    /**
+     * Returns a permuting tuple reference that projects away the document field(s) of a tuple, only leaving the key fields.
+     */
+    private PermutingTupleReference createKeysOnlyTupleReference() {
+        // Project away token fields.
+        int[] keyFieldPermutation = new int[invListTypeTraits.length];
+        int numTokenFields = tokenTypeTraits.length;
+        for (int i = 0; i < invListTypeTraits.length; i++) {
+            keyFieldPermutation[i] = numTokenFields + i;
+        }
+        return new PermutingTupleReference(keyFieldPermutation);
+    }
+
+    @Override
+    public boolean scheduleFlush(ILSMIndexOperationContext ctx, ILSMIOOperationCallback callback)
+            throws HyracksDataException {
+        if (!mutableComponent.isModified()) {
+            return false;
+        }
+        LSMComponentFileReferences componentFileRefs = fileManager.getRelFlushFileReference();
+        LSMInvertedIndexOpContext opCtx = createOpContext(NoOpOperationCallback.INSTANCE,
+                NoOpOperationCallback.INSTANCE);
+        ILSMComponent flushingComponent = ctx.getComponentHolder().get(0);
+        opCtx.setOperation(IndexOperation.FLUSH);
+        opCtx.getComponentHolder().add(flushingComponent);
+        ioScheduler.scheduleOperation(new LSMInvertedIndexFlushOperation(new LSMInvertedIndexAccessor(this, lsmHarness,
+                fileManager, opCtx), mutableComponent, componentFileRefs.getInsertIndexFileReference(),
+                componentFileRefs.getDeleteIndexFileReference(), componentFileRefs.getBloomFilterFileReference(),
+                callback));
+        return true;
+    }
+
+    @Override
+    public ILSMComponent flush(ILSMIOOperation operation) throws HyracksDataException, IndexException {
+        LSMInvertedIndexFlushOperation flushOp = (LSMInvertedIndexFlushOperation) operation;
+
+        // Create an inverted index instance to be bulk loaded.
+        LSMInvertedIndexImmutableComponent component = createDiskInvIndexComponent(componentFactory,
+                flushOp.getDictBTreeFlushTarget(), flushOp.getDeletedKeysBTreeFlushTarget(),
+                flushOp.getBloomFilterFlushTarget(), true);
+        IInvertedIndex diskInvertedIndex = component.getInvIndex();
+
+        // Create a scan cursor on the BTree underlying the in-memory inverted index.
+        LSMInvertedIndexMutableComponent flushingComponent = flushOp.getFlushingComponent();
+        InMemoryInvertedIndexAccessor memInvIndexAccessor = (InMemoryInvertedIndexAccessor) flushingComponent
+                .getInvIndex().createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        BTreeAccessor memBTreeAccessor = memInvIndexAccessor.getBTreeAccessor();
+        RangePredicate nullPred = new RangePredicate(null, null, true, true, null, null);
+        IIndexCursor scanCursor = memBTreeAccessor.createSearchCursor();
+        memBTreeAccessor.search(scanCursor, nullPred);
+
+        // Bulk load the disk inverted index from the in-memory inverted index.
+        IIndexBulkLoader invIndexBulkLoader = diskInvertedIndex.createBulkLoader(1.0f, false, 0L);
+        try {
+            while (scanCursor.hasNext()) {
+                scanCursor.next();
+                invIndexBulkLoader.add(scanCursor.getTuple());
+            }
+        } finally {
+            scanCursor.close();
+        }
+        invIndexBulkLoader.end();
+
+        IIndexAccessor deletedKeysBTreeAccessor = flushingComponent.getDeletedKeysBTree().createAccessor(
+                NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        IIndexCursor btreeCountingCursor = ((BTreeAccessor) deletedKeysBTreeAccessor).createCountingSearchCursor();
+        deletedKeysBTreeAccessor.search(btreeCountingCursor, nullPred);
+        long numBTreeTuples = 0L;
+        try {
+            while (btreeCountingCursor.hasNext()) {
+                btreeCountingCursor.next();
+                ITupleReference countTuple = btreeCountingCursor.getTuple();
+                numBTreeTuples = IntegerSerializerDeserializer.getInt(countTuple.getFieldData(0),
+                        countTuple.getFieldStart(0));
+            }
+        } finally {
+            btreeCountingCursor.close();
+        }
+
+        if (numBTreeTuples > 0) {
+            int maxBucketsPerElement = BloomCalculations.maxBucketsPerElement(numBTreeTuples);
+            BloomFilterSpecification bloomFilterSpec = BloomCalculations.computeBloomSpec(maxBucketsPerElement,
+                    MAX_BLOOM_FILTER_ACCEPTABLE_FALSE_POSITIVE_RATE);
+
+            // Create an BTree instance for the deleted keys.
+            BTree diskDeletedKeysBTree = component.getDeletedKeysBTree();
+
+            // Create a scan cursor on the deleted keys BTree underlying the in-memory inverted index.
+            IIndexCursor deletedKeysScanCursor = deletedKeysBTreeAccessor.createSearchCursor();
+            deletedKeysBTreeAccessor.search(deletedKeysScanCursor, nullPred);
+
+            // Bulk load the deleted-keys BTree.
+            IIndexBulkLoader deletedKeysBTreeBulkLoader = diskDeletedKeysBTree.createBulkLoader(1.0f, false, 0L);
+            IIndexBulkLoader builder = component.getBloomFilter().createBuilder(numBTreeTuples,
+                    bloomFilterSpec.getNumHashes(), bloomFilterSpec.getNumBucketsPerElements());
+
+            try {
+                while (deletedKeysScanCursor.hasNext()) {
+                    deletedKeysScanCursor.next();
+                    deletedKeysBTreeBulkLoader.add(deletedKeysScanCursor.getTuple());
+                    builder.add(deletedKeysScanCursor.getTuple());
+                }
+            } finally {
+                deletedKeysScanCursor.close();
+                builder.end();
+            }
+            deletedKeysBTreeBulkLoader.end();
+        }
+
+        return component;
+    }
+
+    @Override
+    public void scheduleMerge(ILSMIndexOperationContext ctx, ILSMIOOperationCallback callback)
+            throws HyracksDataException, IndexException {
+        LSMInvertedIndexOpContext ictx = createOpContext(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        List<ILSMComponent> mergingComponents = ctx.getComponentHolder();
+        ictx.getComponentHolder().addAll(mergingComponents);
+        IIndexCursor cursor = new LSMInvertedIndexRangeSearchCursor(ictx);
+        RangePredicate mergePred = new RangePredicate(null, null, true, true, null, null);
+
+        // Scan diskInvertedIndexes ignoring the memoryInvertedIndex.
+        search(ictx, cursor, mergePred);
+
+        ictx.setOperation(IndexOperation.MERGE);
+        LSMInvertedIndexImmutableComponent firstComponent = (LSMInvertedIndexImmutableComponent) mergingComponents
+                .get(0);
+        OnDiskInvertedIndex firstInvIndex = (OnDiskInvertedIndex) firstComponent.getInvIndex();
+        String firstFileName = firstInvIndex.getBTree().getFileReference().getFile().getName();
+
+        LSMInvertedIndexImmutableComponent lastComponent = (LSMInvertedIndexImmutableComponent) mergingComponents
+                .get(mergingComponents.size() - 1);
+        OnDiskInvertedIndex lastInvIndex = (OnDiskInvertedIndex) lastComponent.getInvIndex();
+        String lastFileName = lastInvIndex.getBTree().getFileReference().getFile().getName();
+
+        LSMComponentFileReferences relMergeFileRefs = fileManager.getRelMergeFileReference(firstFileName, lastFileName);
+        ILSMIndexAccessorInternal accessor = new LSMInvertedIndexAccessor(this, lsmHarness, fileManager, ictx);
+        ioScheduler.scheduleOperation(new LSMInvertedIndexMergeOperation(accessor, mergingComponents, cursor,
+                relMergeFileRefs.getInsertIndexFileReference(), relMergeFileRefs.getDeleteIndexFileReference(),
+                relMergeFileRefs.getBloomFilterFileReference(), callback));
+    }
+
+    @Override
+    public ILSMComponent merge(List<ILSMComponent> mergedComponents, ILSMIOOperation operation)
+            throws HyracksDataException, IndexException {
+        LSMInvertedIndexMergeOperation mergeOp = (LSMInvertedIndexMergeOperation) operation;
+
+        // Create an inverted index instance.
+        LSMInvertedIndexImmutableComponent component = createDiskInvIndexComponent(componentFactory,
+                mergeOp.getDictBTreeMergeTarget(), mergeOp.getDeletedKeysBTreeMergeTarget(),
+                mergeOp.getBloomFilterMergeTarget(), true);
+
+        IInvertedIndex mergedDiskInvertedIndex = component.getInvIndex();
+        IIndexCursor cursor = mergeOp.getCursor();
+        IIndexBulkLoader invIndexBulkLoader = mergedDiskInvertedIndex.createBulkLoader(1.0f, true, 0L);
+        try {
+            while (cursor.hasNext()) {
+                cursor.next();
+                ITupleReference tuple = cursor.getTuple();
+                invIndexBulkLoader.add(tuple);
+            }
+        } finally {
+            cursor.close();
+        }
+        invIndexBulkLoader.end();
+
+        // Add the merged components for cleanup.
+        mergedComponents.addAll(mergeOp.getMergingComponents());
+
+        return component;
+    }
+
+    private ILSMComponent createBulkLoadTarget() throws HyracksDataException, IndexException {
+        LSMComponentFileReferences componentFileRefs = fileManager.getRelFlushFileReference();
+        return createDiskInvIndexComponent(componentFactory, componentFileRefs.getInsertIndexFileReference(),
+                componentFileRefs.getDeleteIndexFileReference(), componentFileRefs.getBloomFilterFileReference(), true);
+    }
+
+    @Override
+    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
+            throws IndexException {
+        return new LSMInvertedIndexBulkLoader(fillFactor, verifyInput, numElementsHint);
+    }
+
+    public class LSMInvertedIndexBulkLoader implements IIndexBulkLoader {
+        private final ILSMComponent component;
+        private final IIndexBulkLoader invIndexBulkLoader;
+
+        public LSMInvertedIndexBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
+                throws IndexException {
+            // Note that by using a flush target file name, we state that the
+            // new bulk loaded tree is "newer" than any other merged tree.
+            try {
+                component = createBulkLoadTarget();
+            } catch (HyracksDataException e) {
+                throw new TreeIndexException(e);
+            } catch (IndexException e) {
+                throw new TreeIndexException(e);
+            }
+            invIndexBulkLoader = ((LSMInvertedIndexImmutableComponent) component).getInvIndex().createBulkLoader(
+                    fillFactor, verifyInput, numElementsHint);
+        }
+
+        @Override
+        public void add(ITupleReference tuple) throws IndexException, HyracksDataException {
+            try {
+                invIndexBulkLoader.add(tuple);
+            } catch (IndexException e) {
+                handleException();
+                throw e;
+            } catch (HyracksDataException e) {
+                handleException();
+                throw e;
+            } catch (RuntimeException e) {
+                handleException();
+                throw e;
+            }
+        }
+
+        protected void handleException() throws HyracksDataException {
+            ((LSMInvertedIndexImmutableComponent) component).getInvIndex().deactivate();
+            ((LSMInvertedIndexImmutableComponent) component).getInvIndex().destroy();
+            ((LSMInvertedIndexImmutableComponent) component).getDeletedKeysBTree().deactivate();
+            ((LSMInvertedIndexImmutableComponent) component).getDeletedKeysBTree().destroy();
+            ((LSMInvertedIndexImmutableComponent) component).getBloomFilter().deactivate();
+            ((LSMInvertedIndexImmutableComponent) component).getBloomFilter().destroy();
+        }
+
+        @Override
+        public void end() throws IndexException, HyracksDataException {
+            invIndexBulkLoader.end();
+            lsmHarness.addBulkLoadedComponent(component);
+        }
+    }
+
+    protected InMemoryInvertedIndex createInMemoryInvertedIndex(IInMemoryBufferCache memBufferCache)
+            throws IndexException {
+        return InvertedIndexUtils.createInMemoryBTreeInvertedindex(memBufferCache, memFreePageManager,
+                invListTypeTraits, invListCmpFactories, tokenTypeTraits, tokenCmpFactories, tokenizerFactory);
+    }
+
+    protected LSMInvertedIndexImmutableComponent createDiskInvIndexComponent(ILSMComponentFactory factory,
+            FileReference dictBTreeFileRef, FileReference btreeFileRef, FileReference bloomFilterFileRef, boolean create)
+            throws HyracksDataException, IndexException {
+        LSMInvertedIndexImmutableComponent component = (LSMInvertedIndexImmutableComponent) factory
+                .createLSMComponentInstance(new LSMComponentFileReferences(dictBTreeFileRef, btreeFileRef,
+                        bloomFilterFileRef));
+        if (create) {
+            component.getInvIndex().create();
+            component.getDeletedKeysBTree().create();
+            component.getBloomFilter().create();
+        }
+        // Will be closed during cleanup of merge().
+        component.getInvIndex().activate();
+        component.getDeletedKeysBTree().activate();
+        component.getBloomFilter().activate();
+        return component;
+    }
+
+    @Override
+    public ILSMIndexAccessorInternal createAccessor(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback) {
+        return new LSMInvertedIndexAccessor(this, lsmHarness, fileManager, createOpContext(modificationCallback,
+                searchCallback));
+    }
+
+    private LSMInvertedIndexOpContext createOpContext(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback) {
+        return new LSMInvertedIndexOpContext(mutableComponent.getInvIndex(), mutableComponent.getDeletedKeysBTree(),
+                modificationCallback, searchCallback);
+    }
+
+    @Override
+    public IInvertedListCursor createInvertedListCursor() {
+        throw new UnsupportedOperationException("Cannot create inverted list cursor on lsm inverted index.");
+    }
+
+    @Override
+    public void openInvertedListCursor(IInvertedListCursor listCursor, ITupleReference searchKey,
+            IIndexOperationContext ictx) throws HyracksDataException, IndexException {
+        throw new UnsupportedOperationException("Cannot open inverted list cursor on lsm inverted index.");
+    }
+
+    @Override
+    public ITypeTraits[] getInvListTypeTraits() {
+        return invListTypeTraits;
+    }
+
+    @Override
+    public IBinaryComparatorFactory[] getInvListCmpFactories() {
+        return invListCmpFactories;
+    }
+
+    @Override
+    public long getMemoryAllocationSize() {
+        InMemoryBufferCache memBufferCache = (InMemoryBufferCache) mutableComponent.getInvIndex().getBufferCache();
+        return memBufferCache.getNumPages() * memBufferCache.getPageSize();
+    }
+
+    @Override
+    public ITypeTraits[] getTokenTypeTraits() {
+        return tokenTypeTraits;
+    }
+
+    @Override
+    public IBinaryComparatorFactory[] getTokenCmpFactories() {
+        return tokenCmpFactories;
+    }
+
+    public IBinaryTokenizerFactory getTokenizerFactory() {
+        return tokenizerFactory;
+    }
+
+    protected void forceFlushInvListsFileDirtyPages(OnDiskInvertedIndex invIndex) throws HyracksDataException {
+        int fileId = invIndex.getInvListsFileId();
+        IBufferCache bufferCache = invIndex.getBufferCache();
+        int startPageId = 0;
+        int maxPageId = invIndex.getInvListsMaxPageId();
+        forceFlushDirtyPages(bufferCache, fileId, startPageId, maxPageId);
+    }
+
+    @Override
+    public void markAsValid(ILSMComponent lsmComponent) throws HyracksDataException {
+        LSMInvertedIndexImmutableComponent invIndexComponent = (LSMInvertedIndexImmutableComponent) lsmComponent;
+        OnDiskInvertedIndex invIndex = (OnDiskInvertedIndex) invIndexComponent.getInvIndex();
+        // Flush the bloom filter first.
+        int fileId = invIndexComponent.getBloomFilter().getFileId();
+        IBufferCache bufferCache = invIndex.getBufferCache();
+        int startPage = 0;
+        int maxPage = invIndexComponent.getBloomFilter().getNumPages();
+        forceFlushDirtyPages(bufferCache, fileId, startPage, maxPage);
+
+        // Flush inverted index second.
+        forceFlushDirtyPages(invIndex.getBTree());
+        forceFlushInvListsFileDirtyPages(invIndex);
+        markAsValidInternal(invIndex.getBTree());
+
+        // Flush deleted keys BTree.
+        forceFlushDirtyPages(invIndexComponent.getDeletedKeysBTree());
+        markAsValidInternal(invIndexComponent.getDeletedKeysBTree());
+    }
+
+    @Override
+    public void validate() throws HyracksDataException {
+        mutableComponent.getInvIndex().validate();
+        mutableComponent.getDeletedKeysBTree().validate();
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        for (ILSMComponent c : immutableComponents) {
+            LSMInvertedIndexImmutableComponent component = (LSMInvertedIndexImmutableComponent) c;
+            component.getInvIndex().validate();
+            component.getDeletedKeysBTree().validate();
+        }
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexAccessor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexAccessor.java
new file mode 100644
index 0000000..7f7d3cd
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexAccessor.java
@@ -0,0 +1,171 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessorInternal;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+
+public class LSMInvertedIndexAccessor implements ILSMIndexAccessorInternal, IInvertedIndexAccessor {
+
+    protected final ILSMHarness lsmHarness;
+    protected final ILSMIndexFileManager fileManager;
+    protected final ILSMIndexOperationContext ctx;
+    protected final LSMInvertedIndex invIndex;
+
+    public LSMInvertedIndexAccessor(LSMInvertedIndex invIndex, ILSMHarness lsmHarness,
+            ILSMIndexFileManager fileManager, ILSMIndexOperationContext ctx) {
+        this.lsmHarness = lsmHarness;
+        this.fileManager = fileManager;
+        this.ctx = ctx;
+        this.invIndex = invIndex;
+    }
+
+    @Override
+    public void insert(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.INSERT);
+        lsmHarness.modify(ctx, false, tuple);
+    }
+
+    @Override
+    public void delete(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.DELETE);
+        lsmHarness.modify(ctx, false, tuple);
+    }
+
+    @Override
+    public boolean tryInsert(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.INSERT);
+        return lsmHarness.modify(ctx, true, tuple);
+    }
+
+    @Override
+    public boolean tryDelete(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.DELETE);
+        return lsmHarness.modify(ctx, true, tuple);
+    }
+
+    public void search(IIndexCursor cursor, ISearchPredicate searchPred) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.SEARCH);
+        lsmHarness.search(ctx, cursor, searchPred);
+    }
+
+    public IIndexCursor createSearchCursor() {
+        return new LSMInvertedIndexSearchCursor();
+    }
+
+    @Override
+    public void scheduleFlush(ILSMIOOperationCallback callback) throws HyracksDataException {
+        ctx.setOperation(IndexOperation.FLUSH);
+        lsmHarness.scheduleFlush(ctx, callback);
+    }
+
+    @Override
+    public void flush(ILSMIOOperation operation) throws HyracksDataException, IndexException {
+        lsmHarness.flush(ctx, operation);
+    }
+
+    @Override
+    public void scheduleMerge(ILSMIOOperationCallback callback) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.MERGE);
+        lsmHarness.scheduleMerge(ctx, callback);
+    }
+
+    @Override
+    public void merge(ILSMIOOperation operation) throws HyracksDataException, IndexException {
+        lsmHarness.merge(ctx, operation);
+    }
+
+    @Override
+    public IIndexCursor createRangeSearchCursor() {
+        return new LSMInvertedIndexRangeSearchCursor(ctx);
+    }
+
+    @Override
+    public void rangeSearch(IIndexCursor cursor, ISearchPredicate searchPred) throws IndexException,
+            HyracksDataException {
+        search(cursor, searchPred);
+    }
+
+    @Override
+    public void noOp() throws HyracksDataException {
+        lsmHarness.noOp(ctx);
+    }
+
+    @Override
+    public void forcePhysicalDelete(ITupleReference tuple) throws HyracksDataException, IndexException {
+        throw new UnsupportedOperationException("Physical delete not supported by lsm inverted index.");
+    }
+
+    @Override
+    public void forceInsert(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.INSERT);
+        lsmHarness.forceModify(ctx, tuple);
+    }
+
+    @Override
+    public void forceDelete(ITupleReference tuple) throws HyracksDataException, IndexException {
+        ctx.setOperation(IndexOperation.DELETE);
+        lsmHarness.forceModify(ctx, tuple);
+    }
+
+    @Override
+    public void physicalDelete(ITupleReference tuple) throws HyracksDataException, IndexException {
+        throw new UnsupportedOperationException("Physical delete not supported by lsm inverted index.");
+    }
+
+    @Override
+    public void update(ITupleReference tuple) throws HyracksDataException, IndexException {
+        throw new UnsupportedOperationException("Update not supported by lsm inverted index.");
+    }
+
+    @Override
+    public void upsert(ITupleReference tuple) throws HyracksDataException, IndexException {
+        throw new UnsupportedOperationException("Upsert not supported by lsm inverted index.");
+    }
+
+    @Override
+    public boolean tryUpdate(ITupleReference tuple) throws HyracksDataException, IndexException {
+        throw new UnsupportedOperationException("Update not supported by lsm inverted index.");
+    }
+
+    @Override
+    public boolean tryUpsert(ITupleReference tuple) throws HyracksDataException, IndexException {
+        throw new UnsupportedOperationException("Upsert not supported by lsm inverted index.");
+    }
+
+    @Override
+    public IInvertedListCursor createInvertedListCursor() {
+        throw new UnsupportedOperationException("Cannot create inverted list cursor on lsm inverted index.");
+    }
+
+    @Override
+    public void openInvertedListCursor(IInvertedListCursor listCursor, ITupleReference searchKey)
+            throws HyracksDataException, IndexException {
+        throw new UnsupportedOperationException("Cannot open inverted list cursor on lsm inverted index.");
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexComponentFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexComponentFactory.java
new file mode 100644
index 0000000..1f4db63
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexComponentFactory.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilterFactory;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponentFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.OnDiskInvertedIndexFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+
+public class LSMInvertedIndexComponentFactory implements ILSMComponentFactory {
+    private final OnDiskInvertedIndexFactory diskInvIndexFactory;
+    private final TreeIndexFactory<BTree> btreeFactory;
+    private final BloomFilterFactory bloomFilterFactory;
+
+    public LSMInvertedIndexComponentFactory(OnDiskInvertedIndexFactory diskInvIndexFactory,
+            TreeIndexFactory<BTree> btreeFactory, BloomFilterFactory bloomFilterFactory) {
+        this.diskInvIndexFactory = diskInvIndexFactory;
+        this.btreeFactory = btreeFactory;
+        this.bloomFilterFactory = bloomFilterFactory;
+    }
+
+    @Override
+    public ILSMComponent createLSMComponentInstance(LSMComponentFileReferences cfr) throws IndexException,
+            HyracksDataException {
+        return new LSMInvertedIndexImmutableComponent(diskInvIndexFactory.createIndexInstance(cfr
+                .getInsertIndexFileReference()), btreeFactory.createIndexInstance(cfr.getDeleteIndexFileReference()),
+                bloomFilterFactory.createBloomFiltertInstance(cfr.getBloomFilterFileReference()));
+    }
+
+    @Override
+    public IBufferCache getBufferCache() {
+        return diskInvIndexFactory.getBufferCache();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexFileManager.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexFileManager.java
new file mode 100644
index 0000000..ccba624
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexFileManager.java
@@ -0,0 +1,214 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Date;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractLSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BTreeFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexFileNameMapper;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+// TODO: Refactor for better code sharing with other file managers.
+public class LSMInvertedIndexFileManager extends AbstractLSMIndexFileManager implements IInvertedIndexFileNameMapper {
+    private static final String DICT_BTREE_SUFFIX = "b";
+    private static final String INVLISTS_SUFFIX = "i";
+    private static final String DELETED_KEYS_BTREE_SUFFIX = "d";
+
+    // We only need a BTree factory because the inverted indexes consistency is validated against its dictionary BTree.
+    private final BTreeFactory btreeFactory;
+
+    private static FilenameFilter dictBTreeFilter = new FilenameFilter() {
+        public boolean accept(File dir, String name) {
+            return !name.startsWith(".") && name.endsWith(DICT_BTREE_SUFFIX);
+        }
+    };
+
+    private static FilenameFilter invListFilter = new FilenameFilter() {
+        public boolean accept(File dir, String name) {
+            return !name.startsWith(".") && name.endsWith(INVLISTS_SUFFIX);
+        }
+    };
+
+    private static FilenameFilter deletedKeysBTreeFilter = new FilenameFilter() {
+        public boolean accept(File dir, String name) {
+            return !name.startsWith(".") && name.endsWith(DELETED_KEYS_BTREE_SUFFIX);
+        }
+    };
+
+    public LSMInvertedIndexFileManager(IIOManager ioManager, IFileMapProvider fileMapProvider, FileReference file,
+            BTreeFactory btreeFactory, int startIODeviceIndex) {
+        super(ioManager, fileMapProvider, file, null, startIODeviceIndex);
+        this.btreeFactory = btreeFactory;
+    }
+
+    @Override
+    public LSMComponentFileReferences getRelFlushFileReference() {
+        Date date = new Date();
+        String ts = formatter.format(date);
+        String baseName = baseDir + ts + SPLIT_STRING + ts;
+        // Begin timestamp and end timestamp are identical since it is a flush
+        return new LSMComponentFileReferences(createFlushFile(baseName + SPLIT_STRING + DICT_BTREE_SUFFIX),
+                createFlushFile(baseName + SPLIT_STRING + DELETED_KEYS_BTREE_SUFFIX), createFlushFile(baseName
+                        + SPLIT_STRING + BLOOM_FILTER_STRING));
+    }
+
+    @Override
+    public LSMComponentFileReferences getRelMergeFileReference(String firstFileName, String lastFileName)
+            throws HyracksDataException {
+        String[] firstTimestampRange = firstFileName.split(SPLIT_STRING);
+        String[] lastTimestampRange = lastFileName.split(SPLIT_STRING);
+
+        String baseName = baseDir + firstTimestampRange[0] + SPLIT_STRING + lastTimestampRange[1];
+        // Get the range of timestamps by taking the earliest and the latest timestamps
+        return new LSMComponentFileReferences(createMergeFile(baseName + SPLIT_STRING + DICT_BTREE_SUFFIX),
+                createMergeFile(baseName + SPLIT_STRING + DELETED_KEYS_BTREE_SUFFIX), createMergeFile(baseName
+                        + SPLIT_STRING + BLOOM_FILTER_STRING));
+    }
+
+    @Override
+    public List<LSMComponentFileReferences> cleanupAndGetValidFiles() throws HyracksDataException, IndexException {
+        List<LSMComponentFileReferences> validFiles = new ArrayList<LSMComponentFileReferences>();
+        ArrayList<ComparableFileName> allDictBTreeFiles = new ArrayList<ComparableFileName>();
+        ArrayList<ComparableFileName> allInvListsFiles = new ArrayList<ComparableFileName>();
+        ArrayList<ComparableFileName> allDeletedKeysBTreeFiles = new ArrayList<ComparableFileName>();
+        ArrayList<ComparableFileName> allBloomFilterFiles = new ArrayList<ComparableFileName>();
+
+        // Gather files from all IODeviceHandles.
+        for (IODeviceHandle dev : ioManager.getIODevices()) {
+            cleanupAndGetValidFilesInternal(dev, deletedKeysBTreeFilter, btreeFactory, allDeletedKeysBTreeFiles);
+            HashSet<String> deletedKeysBTreeFilesSet = new HashSet<String>();
+            for (ComparableFileName cmpFileName : allDeletedKeysBTreeFiles) {
+                int index = cmpFileName.fileName.lastIndexOf(SPLIT_STRING);
+                deletedKeysBTreeFilesSet.add(cmpFileName.fileName.substring(0, index));
+            }
+
+            // TODO: do we really need to validate the inverted lists files or is validating the dict. BTrees is enough?
+            validateFiles(dev, deletedKeysBTreeFilesSet, allInvListsFiles, invListFilter, null);
+            validateFiles(dev, deletedKeysBTreeFilesSet, allDictBTreeFiles, dictBTreeFilter, btreeFactory);
+            validateFiles(dev, deletedKeysBTreeFilesSet, allBloomFilterFiles, bloomFilterFilter, null);
+        }
+        // Sanity check.
+        if (allDictBTreeFiles.size() != allInvListsFiles.size()
+                || allDictBTreeFiles.size() != allDeletedKeysBTreeFiles.size()
+                || allDictBTreeFiles.size() != allBloomFilterFiles.size()) {
+            throw new HyracksDataException(
+                    "Unequal number of valid Dictionary BTree, Inverted Lists, Deleted BTree, and Bloom Filter files found. Aborting cleanup.");
+        }
+
+        // Trivial cases.
+        if (allDictBTreeFiles.isEmpty() || allInvListsFiles.isEmpty() || allDeletedKeysBTreeFiles.isEmpty()
+                || allBloomFilterFiles.isEmpty()) {
+            return validFiles;
+        }
+
+        if (allDictBTreeFiles.size() == 1 && allInvListsFiles.size() == 1 && allDeletedKeysBTreeFiles.size() == 1
+                && allBloomFilterFiles.size() == 1) {
+            validFiles.add(new LSMComponentFileReferences(allDictBTreeFiles.get(0).fileRef, allDeletedKeysBTreeFiles
+                    .get(0).fileRef, allBloomFilterFiles.get(0).fileRef));
+            return validFiles;
+        }
+
+        // Sorts files names from earliest to latest timestamp.
+        Collections.sort(allDeletedKeysBTreeFiles);
+        Collections.sort(allDictBTreeFiles);
+        Collections.sort(allBloomFilterFiles);
+
+        List<ComparableFileName> validComparableDictBTreeFiles = new ArrayList<ComparableFileName>();
+        ComparableFileName lastDictBTree = allDictBTreeFiles.get(0);
+        validComparableDictBTreeFiles.add(lastDictBTree);
+
+        List<ComparableFileName> validComparableDeletedKeysBTreeFiles = new ArrayList<ComparableFileName>();
+        ComparableFileName lastDeletedKeysBTree = allDeletedKeysBTreeFiles.get(0);
+        validComparableDeletedKeysBTreeFiles.add(lastDeletedKeysBTree);
+
+        List<ComparableFileName> validComparableBloomFilterFiles = new ArrayList<ComparableFileName>();
+        ComparableFileName lastBloomFilter = allBloomFilterFiles.get(0);
+        validComparableBloomFilterFiles.add(lastBloomFilter);
+
+        for (int i = 1; i < allDictBTreeFiles.size(); i++) {
+            ComparableFileName currentRTree = allDictBTreeFiles.get(i);
+            ComparableFileName currentBTree = allDictBTreeFiles.get(i);
+            ComparableFileName currentBloomFilter = allBloomFilterFiles.get(i);
+            // Current start timestamp is greater than last stop timestamp.
+            if (currentRTree.interval[0].compareTo(lastDeletedKeysBTree.interval[1]) > 0
+                    && currentBTree.interval[0].compareTo(lastDeletedKeysBTree.interval[1]) > 0
+                    && currentBloomFilter.interval[0].compareTo(lastBloomFilter.interval[1]) > 0) {
+                validComparableDictBTreeFiles.add(currentRTree);
+                validComparableDeletedKeysBTreeFiles.add(currentBTree);
+                validComparableBloomFilterFiles.add(currentBloomFilter);
+                lastDictBTree = currentRTree;
+                lastDeletedKeysBTree = currentBTree;
+                lastBloomFilter = currentBloomFilter;
+            } else if (currentRTree.interval[0].compareTo(lastDictBTree.interval[0]) >= 0
+                    && currentRTree.interval[1].compareTo(lastDictBTree.interval[1]) <= 0
+                    && currentBTree.interval[0].compareTo(lastDeletedKeysBTree.interval[0]) >= 0
+                    && currentBTree.interval[1].compareTo(lastDeletedKeysBTree.interval[1]) <= 0
+                    && currentBloomFilter.interval[0].compareTo(lastBloomFilter.interval[0]) >= 0
+                    && currentBloomFilter.interval[1].compareTo(lastBloomFilter.interval[1]) <= 0) {
+                // Invalid files are completely contained in last interval.
+                File invalidRTreeFile = new File(currentRTree.fullPath);
+                invalidRTreeFile.delete();
+                File invalidBTreeFile = new File(currentBTree.fullPath);
+                invalidBTreeFile.delete();
+                File invalidBloomFilterFile = new File(currentBloomFilter.fullPath);
+                invalidBloomFilterFile.delete();
+            } else {
+                // This scenario should not be possible.
+                throw new HyracksDataException("Found LSM files with overlapping but not contained timetamp intervals.");
+            }
+        }
+
+        // Sort valid files in reverse lexicographical order, such that newer
+        // files come first.
+        Collections.sort(validComparableDictBTreeFiles, recencyCmp);
+        Collections.sort(validComparableDeletedKeysBTreeFiles, recencyCmp);
+        Collections.sort(validComparableBloomFilterFiles, recencyCmp);
+
+        Iterator<ComparableFileName> dictBTreeFileIter = validComparableDictBTreeFiles.iterator();
+        Iterator<ComparableFileName> deletedKeysBTreeIter = validComparableDeletedKeysBTreeFiles.iterator();
+        Iterator<ComparableFileName> bloomFilterFileIter = validComparableBloomFilterFiles.iterator();
+        while (dictBTreeFileIter.hasNext() && deletedKeysBTreeIter.hasNext()) {
+            ComparableFileName cmpDictBTreeFile = dictBTreeFileIter.next();
+            ComparableFileName cmpDeletedKeysBTreeFile = deletedKeysBTreeIter.next();
+            ComparableFileName cmpBloomFilterFileName = bloomFilterFileIter.next();
+            validFiles.add(new LSMComponentFileReferences(cmpDictBTreeFile.fileRef, cmpDeletedKeysBTreeFile.fileRef,
+                    cmpBloomFilterFileName.fileRef));
+        }
+
+        return validFiles;
+    }
+
+    @Override
+    public String getInvListsFilePath(String dictBTreeFilePath) {
+        int index = dictBTreeFilePath.lastIndexOf(SPLIT_STRING);
+        String file = dictBTreeFilePath.substring(0, index);
+        return file + SPLIT_STRING + INVLISTS_SUFFIX;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexFlushOperation.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexFlushOperation.java
new file mode 100644
index 0000000..eedf0da
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexFlushOperation.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessorInternal;
+
+public class LSMInvertedIndexFlushOperation implements ILSMIOOperation {
+    private final ILSMIndexAccessorInternal accessor;
+    private final LSMInvertedIndexMutableComponent flushingComponent;
+    private final FileReference dictBTreeFlushTarget;
+    private final FileReference deletedKeysBTreeFlushTarget;
+    private final FileReference bloomFilterFlushTarget;
+    private final ILSMIOOperationCallback callback;
+
+    public LSMInvertedIndexFlushOperation(ILSMIndexAccessorInternal accessor,
+            LSMInvertedIndexMutableComponent flushingComponent, FileReference dictBTreeFlushTarget,
+            FileReference deletedKeysBTreeFlushTarget, FileReference bloomFilterFlushTarget,
+            ILSMIOOperationCallback callback) {
+        this.accessor = accessor;
+        this.flushingComponent = flushingComponent;
+        this.dictBTreeFlushTarget = dictBTreeFlushTarget;
+        this.deletedKeysBTreeFlushTarget = deletedKeysBTreeFlushTarget;
+        this.bloomFilterFlushTarget = bloomFilterFlushTarget;
+        this.callback = callback;
+    }
+
+    @Override
+    public Set<IODeviceHandle> getReadDevices() {
+        return Collections.emptySet();
+    }
+
+    @Override
+    public Set<IODeviceHandle> getWriteDevices() {
+        Set<IODeviceHandle> devs = new HashSet<IODeviceHandle>();
+        devs.add(dictBTreeFlushTarget.getDeviceHandle());
+        devs.add(deletedKeysBTreeFlushTarget.getDeviceHandle());
+        devs.add(bloomFilterFlushTarget.getDeviceHandle());
+        return devs;
+
+    }
+
+    @Override
+    public void perform() throws HyracksDataException, IndexException {
+        accessor.flush(this);
+    }
+
+    @Override
+    public ILSMIOOperationCallback getCallback() {
+        return callback;
+    }
+
+    public FileReference getDictBTreeFlushTarget() {
+        return dictBTreeFlushTarget;
+    }
+
+    public FileReference getDeletedKeysBTreeFlushTarget() {
+        return deletedKeysBTreeFlushTarget;
+    }
+
+    public FileReference getBloomFilterFlushTarget() {
+        return bloomFilterFlushTarget;
+    }
+
+    public LSMInvertedIndexMutableComponent getFlushingComponent() {
+        return flushingComponent;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexImmutableComponent.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexImmutableComponent.java
new file mode 100644
index 0000000..4c9b5e8
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexImmutableComponent.java
@@ -0,0 +1,42 @@
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilter;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractImmutableLSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+
+public class LSMInvertedIndexImmutableComponent extends AbstractImmutableLSMComponent {
+
+    private final IInvertedIndex invIndex;
+    private final BTree deletedKeysBTree;
+    private final BloomFilter bloomFilter;
+
+    public LSMInvertedIndexImmutableComponent(IInvertedIndex invIndex, BTree deletedKeysBTree, BloomFilter bloomFilter) {
+        this.invIndex = invIndex;
+        this.deletedKeysBTree = deletedKeysBTree;
+        this.bloomFilter = bloomFilter;
+    }
+
+    @Override
+    public void destroy() throws HyracksDataException {
+        invIndex.deactivate();
+        invIndex.destroy();
+        deletedKeysBTree.deactivate();
+        deletedKeysBTree.destroy();
+        bloomFilter.deactivate();
+        bloomFilter.destroy();
+    }
+
+    public IInvertedIndex getInvIndex() {
+        return invIndex;
+    }
+
+    public BTree getDeletedKeysBTree() {
+        return deletedKeysBTree;
+    }
+
+    public BloomFilter getBloomFilter() {
+        return bloomFilter;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexMergeOperation.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexMergeOperation.java
new file mode 100644
index 0000000..dea628c
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexMergeOperation.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessorInternal;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.OnDiskInvertedIndex;
+
+public class LSMInvertedIndexMergeOperation implements ILSMIOOperation {
+    private final ILSMIndexAccessorInternal accessor;
+    private final List<ILSMComponent> mergingComponents;
+    private final IIndexCursor cursor;
+    private final FileReference dictBTreeMergeTarget;
+    private final FileReference deletedKeysBTreeMergeTarget;
+    private final FileReference bloomFilterMergeTarget;
+    private final ILSMIOOperationCallback callback;
+
+    public LSMInvertedIndexMergeOperation(ILSMIndexAccessorInternal accessor, List<ILSMComponent> mergingComponents,
+            IIndexCursor cursor, FileReference dictBTreeMergeTarget, FileReference deletedKeysBTreeMergeTarget,
+            FileReference bloomFilterMergeTarget, ILSMIOOperationCallback callback) {
+        this.accessor = accessor;
+        this.mergingComponents = mergingComponents;
+        this.cursor = cursor;
+        this.dictBTreeMergeTarget = dictBTreeMergeTarget;
+        this.deletedKeysBTreeMergeTarget = deletedKeysBTreeMergeTarget;
+        this.bloomFilterMergeTarget = bloomFilterMergeTarget;
+        this.callback = callback;
+    }
+
+    @Override
+    public Set<IODeviceHandle> getReadDevices() {
+        Set<IODeviceHandle> devs = new HashSet<IODeviceHandle>();
+        for (Object o : mergingComponents) {
+            LSMInvertedIndexImmutableComponent component = (LSMInvertedIndexImmutableComponent) o;
+            OnDiskInvertedIndex invIndex = (OnDiskInvertedIndex) component.getInvIndex();
+            devs.add(invIndex.getBTree().getFileReference().getDeviceHandle());
+            devs.add(component.getDeletedKeysBTree().getFileReference().getDeviceHandle());
+            devs.add(component.getBloomFilter().getFileReference().getDeviceHandle());
+        }
+        return devs;
+    }
+
+    @Override
+    public Set<IODeviceHandle> getWriteDevices() {
+        Set<IODeviceHandle> devs = new HashSet<IODeviceHandle>();
+        devs.add(dictBTreeMergeTarget.getDeviceHandle());
+        devs.add(deletedKeysBTreeMergeTarget.getDeviceHandle());
+        devs.add(bloomFilterMergeTarget.getDeviceHandle());
+        return devs;
+    }
+
+    @Override
+    public void perform() throws HyracksDataException, IndexException {
+        accessor.merge(this);
+    }
+
+    @Override
+    public ILSMIOOperationCallback getCallback() {
+        return callback;
+    }
+
+    public FileReference getDictBTreeMergeTarget() {
+        return dictBTreeMergeTarget;
+    }
+
+    public FileReference getDeletedKeysBTreeMergeTarget() {
+        return deletedKeysBTreeMergeTarget;
+    }
+
+    public FileReference getBloomFilterMergeTarget() {
+        return bloomFilterMergeTarget;
+    }
+
+    public IIndexCursor getCursor() {
+        return cursor;
+    }
+
+    public List<ILSMComponent> getMergingComponents() {
+        return mergingComponents;
+    }
+
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexMutableComponent.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexMutableComponent.java
new file mode 100644
index 0000000..615f1ee
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexMutableComponent.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractMutableLSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+
+public class LSMInvertedIndexMutableComponent extends AbstractMutableLSMComponent {
+
+    private final IInvertedIndex invIndex;
+    private final BTree deletedKeysBTree;
+    private final IInMemoryFreePageManager mfpm;
+
+    public LSMInvertedIndexMutableComponent(IInvertedIndex invIndex, BTree deletedKeysBTree,
+            IInMemoryFreePageManager mfpm) {
+        this.invIndex = invIndex;
+        this.deletedKeysBTree = deletedKeysBTree;
+        this.mfpm = mfpm;
+    }
+
+    public IInvertedIndex getInvIndex() {
+        return invIndex;
+    }
+
+    public BTree getDeletedKeysBTree() {
+        return deletedKeysBTree;
+    }
+
+    @Override
+    protected boolean isFull() {
+        return mfpm.isFull();
+    }
+
+    @Override
+    protected void reset() throws HyracksDataException {
+        super.reset();
+        invIndex.clear();
+        deletedKeysBTree.clear();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexOpContext.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexOpContext.java
new file mode 100644
index 0000000..b961b7a
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexOpContext.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls;
+
+import java.util.LinkedList;
+import java.util.List;
+
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexAccessor;
+
+public class LSMInvertedIndexOpContext implements ILSMIndexOperationContext {
+
+    private static final int NUM_DOCUMENT_FIELDS = 1;
+
+    private IndexOperation op;
+    private final IInvertedIndex memInvIndex;
+    private final IIndex memDeletedKeysBTree;
+    private final List<ILSMComponent> componentHolder;
+
+    public final IModificationOperationCallback modificationCallback;
+    public final ISearchOperationCallback searchCallback;
+
+    // Tuple that only has the inverted-index elements (aka keys), projecting away the document fields.
+    public PermutingTupleReference keysOnlyTuple;
+
+    // Accessor to the in-memory inverted index.
+    public IInvertedIndexAccessor memInvIndexAccessor;
+    // Accessor to the deleted-keys BTree.
+    public IIndexAccessor deletedKeysBTreeAccessor;
+
+    public LSMInvertedIndexOpContext(IInvertedIndex memInvIndex, IIndex memDeletedKeysBTree,
+            IModificationOperationCallback modificationCallback, ISearchOperationCallback searchCallback) {
+        this.memInvIndex = memInvIndex;
+        this.memDeletedKeysBTree = memDeletedKeysBTree;
+        this.componentHolder = new LinkedList<ILSMComponent>();
+        this.modificationCallback = modificationCallback;
+        this.searchCallback = searchCallback;
+    }
+
+    @Override
+    public void reset() {
+        componentHolder.clear();
+    }
+
+    @Override
+    // TODO: Ignore opcallback for now.
+    public void setOperation(IndexOperation newOp) {
+        reset();
+        switch (newOp) {
+            case INSERT:
+            case DELETE:
+            case PHYSICALDELETE: {
+                if (deletedKeysBTreeAccessor == null) {
+                    memInvIndexAccessor = (IInvertedIndexAccessor) memInvIndex.createAccessor(
+                            NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+                    deletedKeysBTreeAccessor = memDeletedKeysBTree.createAccessor(NoOpOperationCallback.INSTANCE,
+                            NoOpOperationCallback.INSTANCE);
+                    // Project away the document fields, leaving only the key fields.
+                    int numKeyFields = memInvIndex.getInvListTypeTraits().length;
+                    int[] keyFieldPermutation = new int[numKeyFields];
+                    for (int i = 0; i < numKeyFields; i++) {
+                        keyFieldPermutation[i] = NUM_DOCUMENT_FIELDS + i;
+                    }
+                    keysOnlyTuple = new PermutingTupleReference(keyFieldPermutation);
+                }
+                break;
+            }
+        }
+        op = newOp;
+    }
+
+    @Override
+    public IndexOperation getOperation() {
+        return op;
+    }
+
+    @Override
+    public List<ILSMComponent> getComponentHolder() {
+        return componentHolder;
+    }
+
+    @Override
+    public ISearchOperationCallback getSearchOperationCallback() {
+        return searchCallback;
+    }
+
+    @Override
+    public IModificationOperationCallback getModificationCallback() {
+        return modificationCallback;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexRangeSearchCursor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexRangeSearchCursor.java
new file mode 100644
index 0000000..1b5949a
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexRangeSearchCursor.java
@@ -0,0 +1,162 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls;
+
+import java.util.ArrayList;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BloomFilterAwareBTreePointSearchCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMIndexSearchCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexAccessor;
+
+public class LSMInvertedIndexRangeSearchCursor extends LSMIndexSearchCursor {
+
+    // Assuming the cursor for all deleted-keys indexes are of the same type.
+    private IIndexCursor[] deletedKeysBTreeCursors;
+    protected ArrayList<IIndexAccessor> deletedKeysBTreeAccessors;
+    protected PermutingTupleReference keysOnlyTuple;
+    protected RangePredicate keySearchPred;
+
+    public LSMInvertedIndexRangeSearchCursor(ILSMIndexOperationContext opCtx) {
+        super(opCtx);
+    }
+
+    @Override
+    public void next() throws HyracksDataException {
+        super.next();
+    }
+
+    @Override
+    public void open(ICursorInitialState initState, ISearchPredicate searchPred) throws IndexException,
+            HyracksDataException {
+        LSMInvertedIndexRangeSearchCursorInitialState lsmInitState = (LSMInvertedIndexRangeSearchCursorInitialState) initState;
+        cmp = lsmInitState.getOriginalKeyComparator();
+        int numComponents = lsmInitState.getNumComponents();
+        rangeCursors = new IIndexCursor[numComponents];
+        for (int i = 0; i < numComponents; i++) {
+            IInvertedIndexAccessor invIndexAccessor = (IInvertedIndexAccessor) lsmInitState.getIndexAccessors().get(i);
+            rangeCursors[i] = invIndexAccessor.createRangeSearchCursor();
+            invIndexAccessor.rangeSearch(rangeCursors[i], lsmInitState.getSearchPredicate());
+        }
+        lsmHarness = lsmInitState.getLSMHarness();
+        operationalComponents = lsmInitState.getOperationalComponents();
+        includeMemComponent = lsmInitState.getIncludeMemComponent();
+
+        // For searching the deleted-keys BTrees.
+        this.keysOnlyTuple = lsmInitState.getKeysOnlyTuple();
+        deletedKeysBTreeAccessors = lsmInitState.getDeletedKeysBTreeAccessors();
+
+        if (!deletedKeysBTreeAccessors.isEmpty()) {
+            deletedKeysBTreeCursors = new IIndexCursor[deletedKeysBTreeAccessors.size()];
+            int i = 0;
+            if (includeMemComponent) {
+                // No need for a bloom filter for the in-memory BTree.
+                deletedKeysBTreeCursors[i] = deletedKeysBTreeAccessors.get(i).createSearchCursor();
+                ++i;
+            }
+            for (; i < deletedKeysBTreeCursors.length; i++) {
+                deletedKeysBTreeCursors[i] = new BloomFilterAwareBTreePointSearchCursor((IBTreeLeafFrame) lsmInitState
+                        .getgetDeletedKeysBTreeLeafFrameFactory().createFrame(), false,
+                        ((LSMInvertedIndexImmutableComponent) operationalComponents.get(i)).getBloomFilter());
+            }
+
+        }
+        MultiComparator keyCmp = lsmInitState.getKeyComparator();
+        keySearchPred = new RangePredicate(keysOnlyTuple, keysOnlyTuple, true, true, keyCmp, keyCmp);
+
+        setPriorityQueueComparator();
+        initPriorityQueue();
+    }
+
+    /**
+     * Check deleted-keys BTrees whether they contain the key in the checkElement's tuple.
+     */
+    @Override
+    protected boolean isDeleted(PriorityQueueElement checkElement) throws HyracksDataException, IndexException {
+        keysOnlyTuple.reset(checkElement.getTuple());
+        int end = checkElement.getCursorIndex();
+        for (int i = 0; i < end; i++) {
+            deletedKeysBTreeCursors[i].reset();
+            try {
+                deletedKeysBTreeAccessors.get(i).search(deletedKeysBTreeCursors[i], keySearchPred);
+                if (deletedKeysBTreeCursors[i].hasNext()) {
+                    return true;
+                }
+            } catch (IndexException e) {
+                throw new HyracksDataException(e);
+            } finally {
+                deletedKeysBTreeCursors[i].close();
+            }
+        }
+        return false;
+    }
+    
+    @Override
+    protected void checkPriorityQueue() throws HyracksDataException, IndexException {
+        while (!outputPriorityQueue.isEmpty() || needPush == true) {
+            if (!outputPriorityQueue.isEmpty()) {
+                PriorityQueueElement checkElement = outputPriorityQueue.peek();
+                // If there is no previous tuple or the previous tuple can be ignored
+                if (outputElement == null) {
+                    if (isDeleted(checkElement)) {
+                        // If the key has been deleted then pop it and set needPush to true.
+                        // We cannot push immediately because the tuple may be
+                        // modified if hasNext() is called
+                        outputElement = outputPriorityQueue.poll();
+                        needPush = true;
+                    } else {
+                        break;
+                    }
+                } else {
+                    // Compare the previous tuple and the head tuple in the PQ
+                    if (compare(cmp, outputElement.getTuple(), checkElement.getTuple()) == 0) {
+                        // If the previous tuple and the head tuple are
+                        // identical
+                        // then pop the head tuple and push the next tuple from
+                        // the tree of head tuple
+
+                        // the head element of PQ is useless now
+                        PriorityQueueElement e = outputPriorityQueue.poll();
+                        pushIntoPriorityQueue(e);
+                    } else {
+                        // If the previous tuple and the head tuple are different
+                        // the info of previous tuple is useless
+                        if (needPush == true) {
+                            pushIntoPriorityQueue(outputElement);
+                            needPush = false;
+                        }
+                        outputElement = null;
+                    }
+                }
+            } else {
+                // the priority queue is empty and needPush
+                pushIntoPriorityQueue(outputElement);
+                needPush = false;
+                outputElement = null;
+            }
+        }
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexRangeSearchCursorInitialState.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexRangeSearchCursorInitialState.java
new file mode 100644
index 0000000..0cec92e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexRangeSearchCursorInitialState.java
@@ -0,0 +1,132 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+
+public class LSMInvertedIndexRangeSearchCursorInitialState implements ICursorInitialState {
+
+    private final MultiComparator tokensAndKeysCmp;
+    private final MultiComparator keyCmp;
+    private final ILSMHarness lsmHarness;
+
+    private final ArrayList<IIndexAccessor> indexAccessors;
+    private final ArrayList<IIndexAccessor> deletedKeysBTreeAccessors;
+    private final ISearchPredicate predicate;
+    private final PermutingTupleReference keysOnlyTuple;
+    private final ITreeIndexFrameFactory deletedKeysBtreeLeafFrameFactory;
+
+    private final boolean includeMemComponent;
+    private final List<ILSMComponent> operationalComponents;
+
+    public LSMInvertedIndexRangeSearchCursorInitialState(MultiComparator tokensAndKeysCmp, MultiComparator keyCmp,
+            PermutingTupleReference keysOnlyTuple, ITreeIndexFrameFactory deletedKeysBtreeLeafFrameFactory,
+            boolean includeMemComponent, ILSMHarness lsmHarness, ArrayList<IIndexAccessor> indexAccessors,
+            ArrayList<IIndexAccessor> deletedKeysBTreeAccessors, ISearchPredicate predicate,
+            List<ILSMComponent> operationalComponents) {
+        this.tokensAndKeysCmp = tokensAndKeysCmp;
+        this.keyCmp = keyCmp;
+        this.keysOnlyTuple = keysOnlyTuple;
+        this.deletedKeysBtreeLeafFrameFactory = deletedKeysBtreeLeafFrameFactory;
+        this.lsmHarness = lsmHarness;
+        this.indexAccessors = indexAccessors;
+        this.deletedKeysBTreeAccessors = deletedKeysBTreeAccessors;
+        this.predicate = predicate;
+        this.includeMemComponent = includeMemComponent;
+        this.operationalComponents = operationalComponents;
+    }
+
+    public int getNumComponents() {
+        return indexAccessors.size();
+    }
+
+    @Override
+    public ICachedPage getPage() {
+        return null;
+    }
+
+    @Override
+    public void setPage(ICachedPage page) {
+    }
+
+    public List<ILSMComponent> getOperationalComponents() {
+        return operationalComponents;
+    }
+
+    public ILSMHarness getLSMHarness() {
+        return lsmHarness;
+    }
+
+    @Override
+    public ISearchOperationCallback getSearchOperationCallback() {
+        return null;
+    }
+
+    @Override
+    public void setSearchOperationCallback(ISearchOperationCallback searchCallback) {
+        // Do nothing.
+    }
+
+    public ArrayList<IIndexAccessor> getIndexAccessors() {
+        return indexAccessors;
+    }
+
+    public ArrayList<IIndexAccessor> getDeletedKeysBTreeAccessors() {
+        return deletedKeysBTreeAccessors;
+    }
+
+    public ISearchPredicate getSearchPredicate() {
+        return predicate;
+    }
+
+    @Override
+    public void setOriginialKeyComparator(MultiComparator originalCmp) {
+        // Do nothing.
+    }
+
+    @Override
+    public MultiComparator getOriginalKeyComparator() {
+        return tokensAndKeysCmp;
+    }
+
+    public MultiComparator getKeyComparator() {
+        return keyCmp;
+    }
+
+    public ITreeIndexFrameFactory getgetDeletedKeysBTreeLeafFrameFactory() {
+        return deletedKeysBtreeLeafFrameFactory;
+    }
+
+    public boolean getIncludeMemComponent() {
+        return includeMemComponent;
+    }
+
+    public PermutingTupleReference getKeysOnlyTuple() {
+        return keysOnlyTuple;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexSearchCursor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexSearchCursor.java
new file mode 100644
index 0000000..36ad51b
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexSearchCursor.java
@@ -0,0 +1,186 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls;
+
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BloomFilterAwareBTreePointSearchCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.exceptions.OccurrenceThresholdPanicException;
+
+/**
+ * Searches the components one-by-one, completely consuming a cursor before moving on to the next one.
+ * Therefore, the are no guarantees about sort order of the results.
+ */
+public class LSMInvertedIndexSearchCursor implements IIndexCursor {
+
+    private IIndexAccessor currentAccessor;
+    private IIndexCursor currentCursor;
+    private int accessorIndex = -1;
+    private boolean tupleConsumed = true;
+    private ILSMHarness harness;
+    private boolean includeMemComponent;
+    private List<IIndexAccessor> indexAccessors;
+    private ISearchPredicate searchPred;
+    private ISearchOperationCallback searchCallback;
+
+    // Assuming the cursor for all deleted-keys indexes are of the same type.
+    private IIndexCursor[] deletedKeysBTreeCursors;
+    private List<IIndexAccessor> deletedKeysBTreeAccessors;
+    private RangePredicate keySearchPred;
+    private ILSMIndexOperationContext opCtx;
+
+    private List<ILSMComponent> operationalComponents;
+
+    @Override
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws HyracksDataException {
+        LSMInvertedIndexSearchCursorInitialState lsmInitState = (LSMInvertedIndexSearchCursorInitialState) initialState;
+        harness = lsmInitState.getLSMHarness();
+        includeMemComponent = lsmInitState.getIncludeMemComponent();
+        operationalComponents = lsmInitState.getOperationalComponents();
+        indexAccessors = lsmInitState.getIndexAccessors();
+        opCtx = lsmInitState.getOpContext();
+        accessorIndex = 0;
+        this.searchPred = searchPred;
+        this.searchCallback = lsmInitState.getSearchOperationCallback();
+
+        // For searching the deleted-keys BTrees.
+        deletedKeysBTreeAccessors = lsmInitState.getDeletedKeysBTreeAccessors();
+        deletedKeysBTreeCursors = new IIndexCursor[deletedKeysBTreeAccessors.size()];
+        int i = 0;
+        if (includeMemComponent) {
+            // No need for a bloom filter for the in-memory BTree.
+            deletedKeysBTreeCursors[i] = deletedKeysBTreeAccessors.get(i).createSearchCursor();
+            ++i;
+        }
+        for (; i < deletedKeysBTreeCursors.length; i++) {
+            deletedKeysBTreeCursors[i] = new BloomFilterAwareBTreePointSearchCursor((IBTreeLeafFrame) lsmInitState
+                    .getgetDeletedKeysBTreeLeafFrameFactory().createFrame(), false,
+                    ((LSMInvertedIndexImmutableComponent) operationalComponents.get(i)).getBloomFilter());
+        }
+
+        MultiComparator keyCmp = lsmInitState.getKeyComparator();
+        keySearchPred = new RangePredicate(null, null, true, true, keyCmp, keyCmp);
+    }
+
+    protected boolean isDeleted(ITupleReference key) throws HyracksDataException, IndexException {
+        keySearchPred.setLowKey(key, true);
+        keySearchPred.setHighKey(key, true);
+        for (int i = 0; i < accessorIndex; i++) {
+            deletedKeysBTreeCursors[i].reset();
+            try {
+                deletedKeysBTreeAccessors.get(i).search(deletedKeysBTreeCursors[i], keySearchPred);
+                if (deletedKeysBTreeCursors[i].hasNext()) {
+                    return true;
+                }
+            } catch (IndexException e) {
+                throw new HyracksDataException(e);
+            } finally {
+                deletedKeysBTreeCursors[i].close();
+            }
+        }
+        return false;
+    }
+
+    // Move to the next tuple that has not been deleted.
+    private boolean nextValidTuple() throws HyracksDataException, IndexException {
+        while (currentCursor.hasNext()) {
+            currentCursor.next();
+            if (!isDeleted(currentCursor.getTuple())) {
+                tupleConsumed = false;
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public boolean hasNext() throws HyracksDataException, IndexException {
+        if (!tupleConsumed) {
+            return true;
+        }
+        if (currentCursor != null) {
+            if (nextValidTuple()) {
+                return true;
+            }
+            currentCursor.close();
+            accessorIndex++;
+        }
+        while (accessorIndex < indexAccessors.size()) {
+            // Current cursor has been exhausted, switch to next accessor/cursor.
+            currentAccessor = indexAccessors.get(accessorIndex);
+            currentCursor = currentAccessor.createSearchCursor();
+            try {
+                currentAccessor.search(currentCursor, searchPred);
+            } catch (OccurrenceThresholdPanicException e) {
+                throw e;
+            } catch (IndexException e) {
+                throw new HyracksDataException(e);
+            }
+            if (nextValidTuple()) {
+                return true;
+            }
+            // Close as we go to release resources.
+            currentCursor.close();
+            accessorIndex++;
+        }
+        return false;
+    }
+
+    @Override
+    public void next() throws HyracksDataException {
+        // Mark the tuple as consumed, so hasNext() can move on.
+        tupleConsumed = true;
+        // We assume that the underlying cursors materialize their results such that
+        // there is no need to reposition the result cursor after reconciliation.
+        if (!searchCallback.proceed(currentCursor.getTuple())) {
+            searchCallback.reconcile(currentCursor.getTuple());
+        }
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        reset();
+        accessorIndex = -1;
+        harness.endSearch(opCtx);
+    }
+
+    @Override
+    public void reset() throws HyracksDataException {
+        if (currentCursor != null) {
+            currentCursor.close();
+            currentCursor = null;
+        }
+        accessorIndex = 0;
+    }
+
+    @Override
+    public ITupleReference getTuple() {
+        return currentCursor.getTuple();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexSearchCursorInitialState.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexSearchCursorInitialState.java
new file mode 100644
index 0000000..eb6f338
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexSearchCursorInitialState.java
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls;
+
+import java.util.List;
+
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+
+public class LSMInvertedIndexSearchCursorInitialState implements ICursorInitialState {
+
+    private final boolean includeMemComponent;
+    private final ILSMHarness lsmHarness;
+    private final List<IIndexAccessor> indexAccessors;
+    private final List<IIndexAccessor> deletedKeysBTreeAccessors;
+    private final LSMInvertedIndexOpContext ctx;
+    private ISearchOperationCallback searchCallback;
+    private MultiComparator originalCmp;
+    private final MultiComparator keyCmp;
+    private final PermutingTupleReference keysOnlyTuple;
+    private final ITreeIndexFrameFactory deletedKeysBtreeLeafFrameFactory;
+
+    private final List<ILSMComponent> operationalComponents;
+
+    public LSMInvertedIndexSearchCursorInitialState(final MultiComparator keyCmp,
+            PermutingTupleReference keysOnlyTuple, List<IIndexAccessor> indexAccessors,
+            List<IIndexAccessor> deletedKeysBTreeAccessors, ITreeIndexFrameFactory deletedKeysBtreeLeafFrameFactory,
+            IIndexOperationContext ctx, boolean includeMemComponent, ILSMHarness lsmHarness,
+            List<ILSMComponent> operationalComponents) {
+        this.keyCmp = keyCmp;
+        this.keysOnlyTuple = keysOnlyTuple;
+        this.indexAccessors = indexAccessors;
+        this.deletedKeysBTreeAccessors = deletedKeysBTreeAccessors;
+        this.deletedKeysBtreeLeafFrameFactory = deletedKeysBtreeLeafFrameFactory;
+        this.includeMemComponent = includeMemComponent;
+        this.operationalComponents = operationalComponents;
+        this.lsmHarness = lsmHarness;
+        this.ctx = (LSMInvertedIndexOpContext) ctx;
+        this.searchCallback = this.ctx.searchCallback;
+    }
+
+    @Override
+    public ICachedPage getPage() {
+        return null;
+    }
+
+    @Override
+    public void setPage(ICachedPage page) {
+    }
+
+    public List<ILSMComponent> getOperationalComponents() {
+        return operationalComponents;
+    }
+
+    public List<IIndexAccessor> getIndexAccessors() {
+        return indexAccessors;
+    }
+
+    public boolean getIncludeMemComponent() {
+        return includeMemComponent;
+    }
+
+    public ILSMHarness getLSMHarness() {
+        return lsmHarness;
+    }
+
+    public ILSMIndexOperationContext getOpContext() {
+        return ctx;
+    }
+
+    @Override
+    public ISearchOperationCallback getSearchOperationCallback() {
+        return searchCallback;
+    }
+
+    @Override
+    public void setSearchOperationCallback(ISearchOperationCallback searchCallback) {
+        this.searchCallback = searchCallback;
+    }
+
+    @Override
+    public MultiComparator getOriginalKeyComparator() {
+        return originalCmp;
+    }
+
+    @Override
+    public void setOriginialKeyComparator(MultiComparator originalCmp) {
+        this.originalCmp = originalCmp;
+    }
+
+    public MultiComparator getKeyComparator() {
+        return keyCmp;
+    }
+
+    public List<IIndexAccessor> getDeletedKeysBTreeAccessors() {
+        return deletedKeysBTreeAccessors;
+    }
+    
+    public ITreeIndexFrameFactory getgetDeletedKeysBTreeLeafFrameFactory() {
+        return deletedKeysBtreeLeafFrameFactory;
+    }
+
+    public PermutingTupleReference getKeysOnlyTuple() {
+        return keysOnlyTuple;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/PartitionedLSMInvertedIndex.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/PartitionedLSMInvertedIndex.java
new file mode 100644
index 0000000..1b293eb
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/impls/PartitionedLSMInvertedIndex.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilterFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BTreeFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory.InMemoryInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.OnDiskInvertedIndexFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.InvertedIndexUtils;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class PartitionedLSMInvertedIndex extends LSMInvertedIndex {
+
+    public PartitionedLSMInvertedIndex(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, OnDiskInvertedIndexFactory diskInvIndexFactory,
+            BTreeFactory deletedKeysBTreeFactory, BloomFilterFactory bloomFilterFactory,
+            ILSMIndexFileManager fileManager, IFileMapProvider diskFileMapProvider, ITypeTraits[] invListTypeTraits,
+            IBinaryComparatorFactory[] invListCmpFactories, ITypeTraits[] tokenTypeTraits,
+            IBinaryComparatorFactory[] tokenCmpFactories, IBinaryTokenizerFactory tokenizerFactory,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider)
+            throws IndexException {
+        super(memBufferCache, memFreePageManager, diskInvIndexFactory, deletedKeysBTreeFactory, bloomFilterFactory,
+                fileManager, diskFileMapProvider, invListTypeTraits, invListCmpFactories, tokenTypeTraits,
+                tokenCmpFactories, tokenizerFactory, mergePolicy, opTrackerFactory, ioScheduler, ioOpCallbackProvider);
+    }
+
+    protected InMemoryInvertedIndex createInMemoryInvertedIndex(IInMemoryBufferCache memBufferCache)
+            throws IndexException {
+        return InvertedIndexUtils.createPartitionedInMemoryBTreeInvertedindex(memBufferCache, memFreePageManager,
+                invListTypeTraits, invListCmpFactories, tokenTypeTraits, tokenCmpFactories, tokenizerFactory);
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndex.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndex.java
new file mode 100644
index 0000000..d5a074e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndex.java
@@ -0,0 +1,208 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory;
+
+import java.io.File;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeDuplicateKeyException;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeException;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeNonExistentKeyException;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree.BTreeAccessor;
+import edu.uci.ics.hyracks.storage.am.btree.util.BTreeUtils;
+import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.InMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+
+public class InMemoryInvertedIndex implements IInvertedIndex {
+
+    protected final BTree btree;
+    protected final FileReference memBTreeFile = new FileReference(new File("memBTree"));
+    protected final ITypeTraits[] tokenTypeTraits;
+    protected final IBinaryComparatorFactory[] tokenCmpFactories;
+    protected final ITypeTraits[] invListTypeTraits;
+    protected final IBinaryComparatorFactory[] invListCmpFactories;
+    protected final IBinaryTokenizerFactory tokenizerFactory;
+
+    protected final ITypeTraits[] btreeTypeTraits;
+    protected final IBinaryComparatorFactory[] btreeCmpFactories;
+
+    public InMemoryInvertedIndex(IBufferCache memBufferCache, IFreePageManager memFreePageManager,
+            ITypeTraits[] invListTypeTraits, IBinaryComparatorFactory[] invListCmpFactories,
+            ITypeTraits[] tokenTypeTraits, IBinaryComparatorFactory[] tokenCmpFactories,
+            IBinaryTokenizerFactory tokenizerFactory) throws BTreeException {
+        this.tokenTypeTraits = tokenTypeTraits;
+        this.tokenCmpFactories = tokenCmpFactories;
+        this.invListTypeTraits = invListTypeTraits;
+        this.invListCmpFactories = invListCmpFactories;
+        this.tokenizerFactory = tokenizerFactory;
+        // BTree tuples: <tokens, inverted-list elements>.
+        int numBTreeFields = tokenTypeTraits.length + invListTypeTraits.length;
+        btreeTypeTraits = new ITypeTraits[numBTreeFields];
+        btreeCmpFactories = new IBinaryComparatorFactory[numBTreeFields];
+        for (int i = 0; i < tokenTypeTraits.length; i++) {
+            btreeTypeTraits[i] = tokenTypeTraits[i];
+            btreeCmpFactories[i] = tokenCmpFactories[i];
+        }
+        for (int i = 0; i < invListTypeTraits.length; i++) {
+            btreeTypeTraits[tokenTypeTraits.length + i] = invListTypeTraits[i];
+            btreeCmpFactories[tokenTypeTraits.length + i] = invListCmpFactories[i];
+        }
+        this.btree = BTreeUtils.createBTree(memBufferCache, memFreePageManager,
+                ((InMemoryBufferCache) memBufferCache).getFileMapProvider(), btreeTypeTraits, btreeCmpFactories,
+                BTreeLeafFrameType.REGULAR_NSM, memBTreeFile);
+    }
+
+    @Override
+    public void create() throws HyracksDataException {
+        btree.create();
+    }
+
+    @Override
+    public void activate() throws HyracksDataException {
+        btree.activate();
+    }
+
+    @Override
+    public void clear() throws HyracksDataException {
+        btree.clear();
+    }
+
+    @Override
+    public void deactivate() throws HyracksDataException {
+        btree.deactivate();
+    }
+
+    @Override
+    public void destroy() throws HyracksDataException {
+        btree.destroy();
+    }
+
+    @Override
+    public void validate() throws HyracksDataException {
+        btree.validate();
+    }
+
+    public void insert(ITupleReference tuple, BTreeAccessor btreeAccessor, IIndexOperationContext ictx)
+            throws HyracksDataException, IndexException {
+        InMemoryInvertedIndexOpContext ctx = (InMemoryInvertedIndexOpContext) ictx;
+        ctx.tupleIter.reset(tuple);
+        while (ctx.tupleIter.hasNext()) {
+            ctx.tupleIter.next();
+            ITupleReference insertTuple = ctx.tupleIter.getTuple();
+            try {
+                btreeAccessor.insert(insertTuple);
+            } catch (BTreeDuplicateKeyException e) {
+                // This exception may be caused by duplicate tokens in the same insert "document".
+                // We ignore such duplicate tokens in all inverted-index implementations, hence
+                // we can safely ignore this exception.
+            }
+        }
+    }
+
+    public void delete(ITupleReference tuple, BTreeAccessor btreeAccessor, IIndexOperationContext ictx)
+            throws HyracksDataException, IndexException {
+        InMemoryInvertedIndexOpContext ctx = (InMemoryInvertedIndexOpContext) ictx;
+        ctx.tupleIter.reset(tuple);
+        while (ctx.tupleIter.hasNext()) {
+            ctx.tupleIter.next();
+            ITupleReference deleteTuple = ctx.tupleIter.getTuple();
+            try {
+                btreeAccessor.delete(deleteTuple);
+            } catch (BTreeNonExistentKeyException e) {
+                // Ignore this exception, since a document may have duplicate tokens.
+            }
+        }
+    }
+
+    @Override
+    public long getMemoryAllocationSize() {
+        InMemoryBufferCache memBufferCache = (InMemoryBufferCache) btree.getBufferCache();
+        return memBufferCache.getNumPages() * memBufferCache.getPageSize();
+    }
+
+    @Override
+    public IInvertedListCursor createInvertedListCursor() {
+        return new InMemoryInvertedListCursor(invListTypeTraits.length, tokenTypeTraits.length);
+    }
+
+    @Override
+    public void openInvertedListCursor(IInvertedListCursor listCursor, ITupleReference searchKey,
+            IIndexOperationContext ictx) throws HyracksDataException, IndexException {
+        InMemoryInvertedIndexOpContext ctx = (InMemoryInvertedIndexOpContext) ictx;
+        ctx.setOperation(IndexOperation.SEARCH);
+        InMemoryInvertedListCursor inMemListCursor = (InMemoryInvertedListCursor) listCursor;
+        inMemListCursor.prepare(ctx.btreeAccessor, ctx.btreePred, ctx.tokenFieldsCmp, ctx.btreeCmp);
+        inMemListCursor.reset(searchKey);
+    }
+
+    @Override
+    public IIndexAccessor createAccessor(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback) {
+        return new InMemoryInvertedIndexAccessor(this, new InMemoryInvertedIndexOpContext(btree, tokenCmpFactories,
+                tokenizerFactory));
+    }
+
+    @Override
+    public IBufferCache getBufferCache() {
+        return btree.getBufferCache();
+    }
+
+    public BTree getBTree() {
+        return btree;
+    }
+
+    @Override
+    public IBinaryComparatorFactory[] getInvListCmpFactories() {
+        return invListCmpFactories;
+    }
+
+    @Override
+    public ITypeTraits[] getInvListTypeTraits() {
+        return invListTypeTraits;
+    }
+
+    @Override
+    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
+            throws IndexException {
+        throw new UnsupportedOperationException("Bulk load not supported by in-memory inverted index.");
+    }
+
+    @Override
+    public ITypeTraits[] getTokenTypeTraits() {
+        return tokenTypeTraits;
+    }
+
+    @Override
+    public IBinaryComparatorFactory[] getTokenCmpFactories() {
+        return tokenCmpFactories;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexAccessor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexAccessor.java
new file mode 100644
index 0000000..a62aaf1
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexAccessor.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory;
+
+import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree.BTreeAccessor;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeRangeSearchCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearcher;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.OnDiskInvertedIndex.DefaultHyracksCommonContext;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.OnDiskInvertedIndexSearchCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.InvertedIndexSearchPredicate;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.TOccurrenceSearcher;
+
+public class InMemoryInvertedIndexAccessor implements IInvertedIndexAccessor {
+    // TODO: This ctx needs to go away.
+    protected final IHyracksCommonContext hyracksCtx = new DefaultHyracksCommonContext();
+    protected final IInvertedIndexSearcher searcher;
+    protected IIndexOperationContext opCtx;
+    protected InMemoryInvertedIndex index;
+    protected BTreeAccessor btreeAccessor;
+
+    public InMemoryInvertedIndexAccessor(InMemoryInvertedIndex index, IIndexOperationContext opCtx) {
+        this.opCtx = opCtx;
+        this.index = index;
+        this.searcher = createSearcher();
+        this.btreeAccessor = (BTreeAccessor) index.getBTree().createAccessor(NoOpOperationCallback.INSTANCE,
+                NoOpOperationCallback.INSTANCE);
+    }
+
+    @Override
+    public void insert(ITupleReference tuple) throws HyracksDataException, IndexException {
+        opCtx.setOperation(IndexOperation.INSERT);
+        index.insert(tuple, btreeAccessor, opCtx);
+    }
+
+    @Override
+    public void delete(ITupleReference tuple) throws HyracksDataException, IndexException {
+        opCtx.setOperation(IndexOperation.DELETE);
+        index.delete(tuple, btreeAccessor, opCtx);
+    }
+
+    @Override
+    public IIndexCursor createSearchCursor() {
+        return new OnDiskInvertedIndexSearchCursor(searcher, index.getInvListTypeTraits().length);
+    }
+
+    @Override
+    public void search(IIndexCursor cursor, ISearchPredicate searchPred) throws HyracksDataException, IndexException {
+        searcher.search((OnDiskInvertedIndexSearchCursor) cursor, (InvertedIndexSearchPredicate) searchPred, opCtx);
+    }
+
+    @Override
+    public IInvertedListCursor createInvertedListCursor() {
+        return index.createInvertedListCursor();
+    }
+
+    @Override
+    public void openInvertedListCursor(IInvertedListCursor listCursor, ITupleReference searchKey)
+            throws HyracksDataException, IndexException {
+        index.openInvertedListCursor(listCursor, searchKey, opCtx);
+    }
+
+    @Override
+    public IIndexCursor createRangeSearchCursor() {
+        IBTreeLeafFrame leafFrame = (IBTreeLeafFrame) index.getBTree().getLeafFrameFactory().createFrame();
+        return new BTreeRangeSearchCursor(leafFrame, false);
+    }
+
+    @Override
+    public void rangeSearch(IIndexCursor cursor, ISearchPredicate searchPred) throws IndexException,
+            HyracksDataException {
+        btreeAccessor.search(cursor, searchPred);
+    }
+
+    public BTreeAccessor getBTreeAccessor() {
+        return btreeAccessor;
+    }
+
+    @Override
+    public void update(ITupleReference tuple) throws HyracksDataException, IndexException {
+        throw new UnsupportedOperationException("Update not supported by in-memory inverted index.");
+    }
+
+    @Override
+    public void upsert(ITupleReference tuple) throws HyracksDataException, IndexException {
+        throw new UnsupportedOperationException("Upsert not supported by in-memory inverted index.");
+    }
+
+    protected IInvertedIndexSearcher createSearcher() {
+        return new TOccurrenceSearcher(hyracksCtx, index);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexOpContext.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexOpContext.java
new file mode 100644
index 0000000..9c8865e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexOpContext.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree.BTreeAccessor;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizer;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.InvertedIndexTokenizingTupleIterator;
+
+public class InMemoryInvertedIndexOpContext implements IIndexOperationContext {
+    public IndexOperation op;
+    public final BTree btree;
+
+    // Needed for search operations,    
+    public RangePredicate btreePred;
+    public BTreeAccessor btreeAccessor;
+    public MultiComparator btreeCmp;
+    public IBinaryComparatorFactory[] tokenCmpFactories;
+    public MultiComparator tokenFieldsCmp;
+
+    // To generate in-memory BTree tuples for insertions.
+    protected final IBinaryTokenizerFactory tokenizerFactory;
+    public InvertedIndexTokenizingTupleIterator tupleIter;
+
+    public InMemoryInvertedIndexOpContext(BTree btree, IBinaryComparatorFactory[] tokenCmpFactories,
+            IBinaryTokenizerFactory tokenizerFactory) {
+        this.btree = btree;
+        this.tokenCmpFactories = tokenCmpFactories;
+        this.tokenizerFactory = tokenizerFactory;
+    }
+
+    @Override
+    public void setOperation(IndexOperation newOp) {
+        switch (newOp) {
+            case INSERT:
+            case DELETE: {
+                if (tupleIter == null) {
+                    setTokenizingTupleIterator();
+                }
+                break;
+            }
+            case SEARCH: {
+                if (btreePred == null) {
+                    btreePred = new RangePredicate(null, null, true, true, null, null);
+                    btreeAccessor = (BTreeAccessor) btree.createAccessor(NoOpOperationCallback.INSTANCE,
+                            NoOpOperationCallback.INSTANCE);
+                    btreeCmp = MultiComparator.createIgnoreFieldLength(btree.getComparatorFactories());
+                    tokenFieldsCmp = MultiComparator.createIgnoreFieldLength(tokenCmpFactories);
+                }
+                break;
+            }
+            default: {
+                throw new UnsupportedOperationException("Unsupported operation " + newOp);
+            }
+        }
+        op = newOp;
+    }
+
+    @Override
+    public void reset() {
+        op = null;
+    }
+
+    @Override
+    public IndexOperation getOperation() {
+        return op;
+    }
+
+    protected void setTokenizingTupleIterator() {
+        IBinaryTokenizer tokenizer = tokenizerFactory.createTokenizer();
+        tupleIter = new InvertedIndexTokenizingTupleIterator(tokenCmpFactories.length, btree.getFieldCount()
+                - tokenCmpFactories.length, tokenizer);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedListCursor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedListCursor.java
new file mode 100644
index 0000000..6af3bd2
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedListCursor.java
@@ -0,0 +1,240 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory;
+
+import java.io.ByteArrayInputStream;
+import java.io.DataInput;
+import java.io.DataInputStream;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree.BTreeAccessor;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.ConcatenatingTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+
+public class InMemoryInvertedListCursor implements IInvertedListCursor {
+    private RangePredicate btreePred;
+    private BTreeAccessor btreeAccessor;
+    private IIndexCursor btreeCursor;
+    private boolean cursorNeedsClose = false;
+    private IIndexCursor countingCursor;
+    private MultiComparator tokenFieldsCmp;
+    private MultiComparator btreeCmp;
+    private final PermutingTupleReference resultTuple;
+    private final ConcatenatingTupleReference btreeSearchTuple;
+
+    private final ArrayTupleBuilder tokenTupleBuilder;
+    private final ArrayTupleReference tokenTuple = new ArrayTupleReference();
+
+    private int numElements = -1;
+
+    public InMemoryInvertedListCursor(int invListFieldCount, int tokenFieldCount) {
+        int[] fieldPermutation = new int[invListFieldCount];
+        for (int i = 0; i < invListFieldCount; i++) {
+            fieldPermutation[i] = tokenFieldCount + i;
+        }
+        resultTuple = new PermutingTupleReference(fieldPermutation);
+        // Concatenating the tuple with tokens, and the tuple with inverted-list elements.
+        btreeSearchTuple = new ConcatenatingTupleReference(2);
+        tokenTupleBuilder = new ArrayTupleBuilder(tokenFieldCount);
+    }
+
+    public void prepare(BTreeAccessor btreeAccessor, RangePredicate btreePred, MultiComparator tokenFieldsCmp,
+            MultiComparator btreeCmp) throws HyracksDataException, IndexException {
+        // Avoid object creation if this.btreeAccessor == btreeAccessor.
+        if (this.btreeAccessor != btreeAccessor) {
+            this.btreeAccessor = btreeAccessor;
+            this.btreeCursor = btreeAccessor.createSearchCursor();
+            this.countingCursor = btreeAccessor.createCountingSearchCursor();
+            this.btreePred = btreePred;
+            this.btreePred.setLowKeyComparator(tokenFieldsCmp);
+            this.btreePred.setHighKeyComparator(tokenFieldsCmp);
+            this.tokenFieldsCmp = tokenFieldsCmp;
+            this.btreeCmp = btreeCmp;
+        }
+    }
+
+    @Override
+    public int compareTo(IInvertedListCursor cursor) {
+        return size() - cursor.size();
+    }
+
+    public void reset(ITupleReference tuple) throws HyracksDataException, IndexException {
+        numElements = -1;
+        // Copy the tokens tuple for later use in btree probes.
+        TupleUtils.copyTuple(tokenTupleBuilder, tuple, tuple.getFieldCount());
+        tokenTuple.reset(tokenTupleBuilder.getFieldEndOffsets(), tokenTupleBuilder.getByteArray());
+        btreeSearchTuple.reset();
+        btreeSearchTuple.addTuple(tokenTuple);
+        btreeCursor.reset();
+        countingCursor.reset();
+    }
+
+    @Override
+    public void reset(int startPageId, int endPageId, int startOff, int numElements) {
+        // Do nothing
+    }
+
+    @Override
+    public void pinPages() throws HyracksDataException, IndexException {
+        btreePred.setLowKeyComparator(tokenFieldsCmp);
+        btreePred.setHighKeyComparator(tokenFieldsCmp);
+        btreePred.setLowKey(tokenTuple, true);
+        btreePred.setHighKey(tokenTuple, true);
+        btreeAccessor.search(btreeCursor, btreePred);
+        cursorNeedsClose = true;
+    }
+
+    @Override
+    public void unpinPages() throws HyracksDataException {
+        if (cursorNeedsClose) {
+            btreeCursor.close();
+            cursorNeedsClose = false;
+        }
+    }
+
+    @Override
+    public boolean hasNext() throws HyracksDataException, IndexException {
+        return btreeCursor.hasNext();
+    }
+
+    @Override
+    public void next() throws HyracksDataException {
+        btreeCursor.next();
+    }
+
+    @Override
+    public ITupleReference getTuple() {
+        resultTuple.reset(btreeCursor.getTuple());
+        return resultTuple;
+    }
+
+    @Override
+    public int size() {
+        if (numElements < 0) {
+            btreePred.setLowKeyComparator(tokenFieldsCmp);
+            btreePred.setHighKeyComparator(tokenFieldsCmp);
+            btreePred.setLowKey(tokenTuple, true);
+            btreePred.setHighKey(tokenTuple, true);
+
+            // Perform the count.
+            try {
+                btreeAccessor.search(countingCursor, btreePred);
+                while (countingCursor.hasNext()) {
+                    countingCursor.next();
+                    ITupleReference countTuple = countingCursor.getTuple();
+                    numElements = IntegerSerializerDeserializer.getInt(countTuple.getFieldData(0),
+                            countTuple.getFieldStart(0));
+                }
+            } catch (HyracksDataException e) {
+                e.printStackTrace();
+            } catch (IndexException e) {
+                e.printStackTrace();
+            } finally {
+                try {
+                    countingCursor.close();
+                } catch (HyracksDataException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+        return numElements;
+    }
+
+    @Override
+    public int getStartPageId() {
+        return 0;
+    }
+
+    @Override
+    public int getEndPageId() {
+        return 0;
+    }
+
+    @Override
+    public int getStartOff() {
+        return 0;
+    }
+
+    @Override
+    public boolean containsKey(ITupleReference searchTuple, MultiComparator invListCmp) throws HyracksDataException,
+            IndexException {
+        // Close cursor if necessary.
+        unpinPages();
+        btreeSearchTuple.addTuple(searchTuple);
+        btreePred.setLowKeyComparator(btreeCmp);
+        btreePred.setHighKeyComparator(btreeCmp);
+        btreePred.setLowKey(btreeSearchTuple, true);
+        btreePred.setHighKey(btreeSearchTuple, true);
+        try {
+            btreeAccessor.search(btreeCursor, btreePred);
+        } catch (TreeIndexException e) {
+            btreeSearchTuple.removeLastTuple();
+            throw new HyracksDataException(e);
+        }
+        boolean containsKey = false;
+        try {
+            containsKey = btreeCursor.hasNext();
+        } finally {
+            btreeCursor.close();
+            btreeCursor.reset();
+            btreeSearchTuple.removeLastTuple();
+        }
+        return containsKey;
+    }
+
+    @SuppressWarnings("rawtypes")
+    @Override
+    public String printInvList(ISerializerDeserializer[] serdes) throws HyracksDataException, IndexException {
+        StringBuilder strBuilder = new StringBuilder();
+        try {
+            while (btreeCursor.hasNext()) {
+                btreeCursor.next();
+                ITupleReference tuple = btreeCursor.getTuple();
+                ByteArrayInputStream inStream = new ByteArrayInputStream(tuple.getFieldData(1), tuple.getFieldStart(1),
+                        tuple.getFieldLength(1));
+                DataInput dataIn = new DataInputStream(inStream);
+                Object o = serdes[0].deserialize(dataIn);
+                strBuilder.append(o.toString() + " ");
+            }
+        } finally {
+            btreeCursor.close();
+            btreeCursor.reset();
+        }
+        try {
+            btreeAccessor.search(btreeCursor, btreePred);
+        } catch (TreeIndexException e) {
+            throw new HyracksDataException(e);
+        }
+        return strBuilder.toString();
+    }
+
+    @SuppressWarnings("rawtypes")
+    @Override
+    public String printCurrentElement(ISerializerDeserializer[] serdes) throws HyracksDataException {
+        return null;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndex.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndex.java
new file mode 100644
index 0000000..7c3f4e4
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndex.java
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory;
+
+import java.util.ArrayList;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeException;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree.BTreeAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearcher;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IPartitionedInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.InvertedListPartitions;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.PartitionedTOccurrenceSearcher;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.PartitionedInvertedIndexTokenizingTupleIterator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+
+public class PartitionedInMemoryInvertedIndex extends InMemoryInvertedIndex implements IPartitionedInvertedIndex {
+
+    protected final ReentrantReadWriteLock partitionIndexLock = new ReentrantReadWriteLock(true);
+    protected short minPartitionIndex = Short.MAX_VALUE;
+    protected short maxPartitionIndex = Short.MIN_VALUE;
+
+    public PartitionedInMemoryInvertedIndex(IBufferCache memBufferCache, IFreePageManager memFreePageManager,
+            ITypeTraits[] invListTypeTraits, IBinaryComparatorFactory[] invListCmpFactories,
+            ITypeTraits[] tokenTypeTraits, IBinaryComparatorFactory[] tokenCmpFactories,
+            IBinaryTokenizerFactory tokenizerFactory) throws BTreeException {
+        super(memBufferCache, memFreePageManager, invListTypeTraits, invListCmpFactories, tokenTypeTraits,
+                tokenCmpFactories, tokenizerFactory);
+    }
+
+    @Override
+    public void insert(ITupleReference tuple, BTreeAccessor btreeAccessor, IIndexOperationContext ictx)
+            throws HyracksDataException, IndexException {
+        super.insert(tuple, btreeAccessor, ictx);
+        PartitionedInMemoryInvertedIndexOpContext ctx = (PartitionedInMemoryInvertedIndexOpContext) ictx;
+        PartitionedInvertedIndexTokenizingTupleIterator tupleIter = (PartitionedInvertedIndexTokenizingTupleIterator) ctx.tupleIter;
+        updatePartitionIndexes(tupleIter.getNumTokens());
+    }
+
+    @Override
+    public void clear() throws HyracksDataException {
+        super.clear();
+        minPartitionIndex = Short.MAX_VALUE;
+        maxPartitionIndex = Short.MIN_VALUE;
+    }
+
+    public void updatePartitionIndexes(short numTokens) {
+        partitionIndexLock.writeLock().lock();
+        if (numTokens < minPartitionIndex) {
+            minPartitionIndex = numTokens;
+        }
+        if (numTokens > maxPartitionIndex) {
+            maxPartitionIndex = numTokens;
+        }
+        partitionIndexLock.writeLock().unlock();
+    }
+
+    @Override
+    public IIndexAccessor createAccessor(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback) {
+        return new PartitionedInMemoryInvertedIndexAccessor(this, new PartitionedInMemoryInvertedIndexOpContext(btree,
+                tokenCmpFactories, tokenizerFactory));
+    }
+
+    @Override
+    public boolean openInvertedListPartitionCursors(IInvertedIndexSearcher searcher, IIndexOperationContext ictx,
+            short numTokensLowerBound, short numTokensUpperBound, InvertedListPartitions invListPartitions,
+            ArrayList<IInvertedListCursor> cursorsOrderedByTokens) throws HyracksDataException, IndexException {
+        short minPartitionIndex;
+        short maxPartitionIndex;
+        partitionIndexLock.readLock().lock();
+        minPartitionIndex = this.minPartitionIndex;
+        maxPartitionIndex = this.maxPartitionIndex;
+        partitionIndexLock.readLock().unlock();
+
+        if (minPartitionIndex == Short.MAX_VALUE && maxPartitionIndex == Short.MIN_VALUE) {
+            // Index must be empty.
+            return false;
+        }
+        short partitionStartIndex = minPartitionIndex;
+        short partitionEndIndex = maxPartitionIndex;
+        if (numTokensLowerBound >= 0) {
+            partitionStartIndex = (short) Math.max(minPartitionIndex, numTokensLowerBound);
+        }
+        if (numTokensUpperBound >= 0) {
+            partitionEndIndex = (short) Math.min(maxPartitionIndex, numTokensUpperBound);
+        }
+
+        PartitionedTOccurrenceSearcher partSearcher = (PartitionedTOccurrenceSearcher) searcher;
+        PartitionedInMemoryInvertedIndexOpContext ctx = (PartitionedInMemoryInvertedIndexOpContext) ictx;
+        ctx.setOperation(IndexOperation.SEARCH);
+        // We can pick either of the full low or high search key, since they should be identical here.
+        ITupleReference searchKey = partSearcher.getFullLowSearchKey();
+        ctx.btreePred.setLowKey(searchKey, true);
+        ctx.btreePred.setHighKey(searchKey, true);
+        // Go through all possibly partitions and see if the token matches.
+        // TODO: This procedure could be made more efficient by determining the next partition to search
+        // using the last existing partition and re-searching the BTree with an open interval as low key.
+        for (short i = partitionStartIndex; i <= partitionEndIndex; i++) {
+            partSearcher.setNumTokensBoundsInSearchKeys(i, i);
+            InMemoryInvertedListCursor inMemListCursor = (InMemoryInvertedListCursor) partSearcher
+                    .getCachedInvertedListCursor();
+            inMemListCursor.prepare(ctx.btreeAccessor, ctx.btreePred, ctx.tokenFieldsCmp, ctx.btreeCmp);
+            inMemListCursor.reset(searchKey);
+            invListPartitions.addInvertedListCursor(inMemListCursor, i);
+        }
+        return true;
+    }
+
+    @Override
+    public boolean isEmpty() {
+        partitionIndexLock.readLock().lock();
+        if (minPartitionIndex == Short.MAX_VALUE && maxPartitionIndex == Short.MIN_VALUE) {
+            // Index must be empty.
+            partitionIndexLock.readLock().unlock();
+            return true;
+        }
+        partitionIndexLock.readLock().unlock();
+        return false;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexAccessor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexAccessor.java
new file mode 100644
index 0000000..813961c
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexAccessor.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory;
+
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearcher;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.PartitionedTOccurrenceSearcher;
+
+public class PartitionedInMemoryInvertedIndexAccessor extends InMemoryInvertedIndexAccessor {
+
+    public PartitionedInMemoryInvertedIndexAccessor(InMemoryInvertedIndex index, IIndexOperationContext opCtx) {
+        super(index, opCtx);
+    }
+
+    protected IInvertedIndexSearcher createSearcher() {
+        return new PartitionedTOccurrenceSearcher(hyracksCtx, index);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexOpContext.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexOpContext.java
new file mode 100644
index 0000000..f0e5046
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexOpContext.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizer;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.PartitionedInvertedIndexTokenizingTupleIterator;
+
+public class PartitionedInMemoryInvertedIndexOpContext extends InMemoryInvertedIndexOpContext {
+
+    public PartitionedInMemoryInvertedIndexOpContext(BTree btree, IBinaryComparatorFactory[] tokenCmpFactories,
+            IBinaryTokenizerFactory tokenizerFactory) {
+        super(btree, tokenCmpFactories, tokenizerFactory);
+    }
+
+    protected void setTokenizingTupleIterator() {
+        IBinaryTokenizer tokenizer = tokenizerFactory.createTokenizer();
+        tupleIter = new PartitionedInvertedIndexTokenizingTupleIterator(tokenCmpFactories.length, btree.getFieldCount()
+                - tokenCmpFactories.length, tokenizer);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeElementInvertedListBuilder.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeElementInvertedListBuilder.java
new file mode 100644
index 0000000..fd12792
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeElementInvertedListBuilder.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListBuilder;
+
+public class FixedSizeElementInvertedListBuilder implements IInvertedListBuilder {
+    private final int listElementSize;
+    private int listSize = 0;
+
+    private byte[] targetBuf;
+    private int pos;
+
+    public FixedSizeElementInvertedListBuilder(ITypeTraits[] invListFields) {
+        int tmp = 0;
+        for (int i = 0; i < invListFields.length; i++) {
+            tmp += invListFields[i].getFixedLength();
+        }
+        listElementSize = tmp;
+    }
+
+    @Override
+    public boolean startNewList(ITupleReference tuple, int tokenField) {
+        if (pos + listElementSize > targetBuf.length) {
+            return false;
+        } else {
+            listSize = 0;
+            return true;
+        }
+    }
+
+    @Override
+    public boolean appendElement(ITupleReference tuple, int numTokenFields, int numElementFields) {
+        if (pos + listElementSize > targetBuf.length) {
+            return false;
+        }
+
+        for (int i = 0; i < numElementFields; i++) {
+            int field = numTokenFields + i;
+            System.arraycopy(tuple.getFieldData(field), tuple.getFieldStart(field), targetBuf, pos,
+                    tuple.getFieldLength(field));
+        }
+
+        listSize++;
+        pos += listElementSize;
+
+        return true;
+    }
+
+    @Override
+    public void setTargetBuffer(byte[] targetBuf, int startPos) {
+        this.targetBuf = targetBuf;
+        this.pos = startPos;
+    }
+
+    @Override
+    public int getListSize() {
+        return listSize;
+    }
+
+    @Override
+    public int getPos() {
+        return pos;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeElementInvertedListBuilderFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeElementInvertedListBuilderFactory.java
new file mode 100644
index 0000000..ca2d3b6
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeElementInvertedListBuilderFactory.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListBuilder;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListBuilderFactory;
+
+public class FixedSizeElementInvertedListBuilderFactory implements IInvertedListBuilderFactory {
+
+    private final ITypeTraits[] invListFields;
+
+    public FixedSizeElementInvertedListBuilderFactory(ITypeTraits[] invListFields) {
+        this.invListFields = invListFields;
+    }
+
+    @Override
+    public IInvertedListBuilder create() {
+        return new FixedSizeElementInvertedListBuilder(invListFields);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeElementInvertedListCursor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeElementInvertedListCursor.java
new file mode 100644
index 0000000..f55a700
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeElementInvertedListCursor.java
@@ -0,0 +1,295 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import java.io.ByteArrayInputStream;
+import java.io.DataInput;
+import java.io.DataInputStream;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+
+public class FixedSizeElementInvertedListCursor implements IInvertedListCursor {
+
+    private final IBufferCache bufferCache;
+    private final int fileId;
+    private final int elementSize;
+    private int currentElementIx;
+    private int currentOff;
+    private int currentPageIx;
+
+    private int startPageId;
+    private int endPageId;
+    private int startOff;
+    private int numElements;
+
+    private final FixedSizeTupleReference tuple;
+    private ICachedPage[] pages = new ICachedPage[10];
+    private int[] elementIndexes = new int[10];
+    
+    private boolean pinned = false;
+
+    public FixedSizeElementInvertedListCursor(IBufferCache bufferCache, int fileId, ITypeTraits[] invListFields) {
+        this.bufferCache = bufferCache;
+        this.fileId = fileId;
+        this.currentElementIx = 0;
+        this.currentPageIx = 0;
+
+        int tmp = 0;
+        for (int i = 0; i < invListFields.length; i++) {
+            tmp += invListFields[i].getFixedLength();
+        }
+        elementSize = tmp;
+        this.currentOff = -elementSize;
+        this.tuple = new FixedSizeTupleReference(invListFields);
+    }
+
+    @Override
+    public boolean hasNext() {
+        if (currentElementIx < numElements)
+            return true;
+        else
+            return false;
+    }
+
+    @Override
+    public void next() {
+        if (currentOff + 2 * elementSize > bufferCache.getPageSize()) {
+            currentPageIx++;
+            currentOff = 0;
+        } else {
+            currentOff += elementSize;
+        }
+        currentElementIx++;
+        tuple.reset(pages[currentPageIx].getBuffer().array(), currentOff);
+    }
+
+    @Override
+    public void pinPages() throws HyracksDataException {
+        if (pinned) {
+            return;
+        }
+        int pix = 0;
+        for (int i = startPageId; i <= endPageId; i++) {
+            pages[pix] = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, i), false);
+            pages[pix].acquireReadLatch();
+            pix++;
+        }
+        pinned = true;
+    }
+
+    @Override
+    public void unpinPages() throws HyracksDataException {
+        int numPages = endPageId - startPageId + 1;
+        for (int i = 0; i < numPages; i++) {
+            pages[i].releaseReadLatch();
+            bufferCache.unpin(pages[i]);
+        }
+        pinned = false;
+    }
+
+    private void positionCursor(int elementIx) {
+        int numPages = endPageId - startPageId + 1;
+
+        currentPageIx = binarySearch(elementIndexes, 0, numPages, elementIx);
+        if (currentPageIx < 0) {
+            throw new IndexOutOfBoundsException("Requested index: " + elementIx + " from array with numElements: "
+                    + numElements);
+        }
+
+        if (currentPageIx == 0) {
+            currentOff = startOff + elementIx * elementSize;
+        } else {
+            int relativeElementIx = elementIx - elementIndexes[currentPageIx - 1] - 1;
+            currentOff = relativeElementIx * elementSize;
+        }
+
+        currentElementIx = elementIx;
+        tuple.reset(pages[currentPageIx].getBuffer().array(), currentOff);
+    }
+
+    @Override
+    public boolean containsKey(ITupleReference searchTuple, MultiComparator invListCmp) {
+        int mid;
+        int begin = 0;
+        int end = numElements - 1;
+
+        while (begin <= end) {
+            mid = (begin + end) / 2;
+            positionCursor(mid);
+            int cmp = invListCmp.compare(searchTuple, tuple);
+            if (cmp < 0) {
+                end = mid - 1;
+            } else if (cmp > 0) {
+                begin = mid + 1;
+            } else {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    @Override
+    public void reset(int startPageId, int endPageId, int startOff, int numElements) {
+        this.startPageId = startPageId;
+        this.endPageId = endPageId;
+        this.startOff = startOff;
+        this.numElements = numElements;
+        this.currentElementIx = 0;
+        this.currentPageIx = 0;
+        this.currentOff = startOff - elementSize;
+
+        int numPages = endPageId - startPageId + 1;
+        if (numPages > pages.length) {
+            pages = new ICachedPage[endPageId - startPageId + 1];
+            elementIndexes = new int[endPageId - startPageId + 1];
+        }
+
+        // fill elementIndexes
+        // first page
+        int cumulElements = (bufferCache.getPageSize() - startOff) / elementSize;
+        elementIndexes[0] = cumulElements - 1;
+
+        // middle, full pages
+        for (int i = 1; i < numPages - 1; i++) {
+            elementIndexes[i] = elementIndexes[i - 1] + (bufferCache.getPageSize() / elementSize);
+        }
+
+        // last page
+        elementIndexes[numPages - 1] = numElements - 1;
+    }
+
+    @SuppressWarnings("rawtypes")
+    @Override
+    public String printInvList(ISerializerDeserializer[] serdes) throws HyracksDataException {
+        int oldCurrentOff = currentOff;
+        int oldCurrentPageId = currentPageIx;
+        int oldCurrentElementIx = currentElementIx;
+
+        currentOff = startOff - elementSize;
+        currentPageIx = 0;
+        currentElementIx = 0;
+
+        StringBuilder strBuilder = new StringBuilder();
+
+        while (hasNext()) {
+            next();
+            for (int i = 0; i < tuple.getFieldCount(); i++) {
+                ByteArrayInputStream inStream = new ByteArrayInputStream(tuple.getFieldData(i), tuple.getFieldStart(i),
+                        tuple.getFieldLength(i));
+                DataInput dataIn = new DataInputStream(inStream);
+                Object o = serdes[i].deserialize(dataIn);
+                strBuilder.append(o.toString());
+                if (i + 1 < tuple.getFieldCount())
+                    strBuilder.append(",");
+            }
+            strBuilder.append(" ");
+        }
+
+        // reset previous state
+        currentOff = oldCurrentOff;
+        currentPageIx = oldCurrentPageId;
+        currentElementIx = oldCurrentElementIx;
+
+        return strBuilder.toString();
+    }
+
+    @SuppressWarnings("rawtypes")
+    public String printCurrentElement(ISerializerDeserializer[] serdes) throws HyracksDataException {
+        StringBuilder strBuilder = new StringBuilder();
+        for (int i = 0; i < tuple.getFieldCount(); i++) {
+            ByteArrayInputStream inStream = new ByteArrayInputStream(tuple.getFieldData(i), tuple.getFieldStart(i),
+                    tuple.getFieldLength(i));
+            DataInput dataIn = new DataInputStream(inStream);
+            Object o = serdes[i].deserialize(dataIn);
+            strBuilder.append(o.toString());
+            if (i + 1 < tuple.getFieldCount())
+                strBuilder.append(",");
+        }
+        return strBuilder.toString();
+    }
+
+    private int binarySearch(int[] arr, int arrStart, int arrLength, int key) {
+        int mid;
+        int begin = arrStart;
+        int end = arrStart + arrLength - 1;
+
+        while (begin <= end) {
+            mid = (begin + end) / 2;
+            int cmp = (key - arr[mid]);
+            if (cmp < 0) {
+                end = mid - 1;
+            } else if (cmp > 0) {
+                begin = mid + 1;
+            } else {
+                return mid;
+            }
+        }
+
+        if (begin > arr.length - 1)
+            return -1;
+        if (key < arr[begin])
+            return begin;
+        else
+            return -1;
+    }
+
+    @Override
+    public int compareTo(IInvertedListCursor invListCursor) {
+        return numElements - invListCursor.size();
+    }
+
+    @Override
+    public int getEndPageId() {
+        return endPageId;
+    }
+
+    @Override
+    public int size() {
+        return numElements;
+    }
+
+    @Override
+    public int getStartOff() {
+        return startOff;
+    }
+
+    @Override
+    public int getStartPageId() {
+        return startPageId;
+    }
+
+    public int getOffset() {
+        return currentOff;
+    }
+
+    public ICachedPage getPage() {
+        return pages[currentPageIx];
+    }
+
+    @Override
+    public ITupleReference getTuple() {
+        return tuple;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeFrameTupleAccessor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeFrameTupleAccessor.java
new file mode 100644
index 0000000..d00c6d3
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeFrameTupleAccessor.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.comm.FrameHelper;
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+
+public class FixedSizeFrameTupleAccessor implements IFrameTupleAccessor {
+
+    private final int frameSize;
+    private ByteBuffer buffer;
+
+    private final ITypeTraits[] fields;
+    private final int[] fieldStartOffsets;
+    private final int tupleSize;
+
+    public FixedSizeFrameTupleAccessor(int frameSize, ITypeTraits[] fields) {
+        this.frameSize = frameSize;
+        this.fields = fields;
+        this.fieldStartOffsets = new int[fields.length];
+        this.fieldStartOffsets[0] = 0;
+        for (int i = 1; i < fields.length; i++) {
+            fieldStartOffsets[i] = fieldStartOffsets[i - 1] + fields[i - 1].getFixedLength();
+        }
+
+        int tmp = 0;
+        for (int i = 0; i < fields.length; i++) {
+            tmp += fields[i].getFixedLength();
+        }
+        tupleSize = tmp;
+    }
+
+    @Override
+    public ByteBuffer getBuffer() {
+        return buffer;
+    }
+
+    @Override
+    public int getFieldCount() {
+        return fields.length;
+    }
+
+    @Override
+    public int getFieldEndOffset(int tupleIndex, int fIdx) {
+        return getTupleStartOffset(tupleIndex) + fieldStartOffsets[fIdx] + fields[fIdx].getFixedLength();
+    }
+
+    @Override
+    public int getFieldLength(int tupleIndex, int fIdx) {
+        return fields[fIdx].getFixedLength();
+    }
+
+    @Override
+    public int getFieldSlotsLength() {
+        return 0;
+    }
+
+    @Override
+    public int getFieldStartOffset(int tupleIndex, int fIdx) {
+        return tupleIndex * tupleSize + fieldStartOffsets[fIdx];
+    }
+
+    @Override
+    public int getTupleCount() {
+        return buffer.getInt(FrameHelper.getTupleCountOffset(frameSize));
+    }
+
+    @Override
+    public int getTupleEndOffset(int tupleIndex) {
+        return getFieldEndOffset(tupleIndex, fields.length - 1);
+    }
+
+    @Override
+    public int getTupleStartOffset(int tupleIndex) {
+        return tupleIndex * tupleSize;
+    }
+
+    @Override
+    public void reset(ByteBuffer buffer) {
+        this.buffer = buffer;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeFrameTupleAppender.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeFrameTupleAppender.java
new file mode 100644
index 0000000..2a8bf8d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeFrameTupleAppender.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.comm.FrameHelper;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+
+public class FixedSizeFrameTupleAppender {
+
+    private static final int TUPLE_COUNT_SIZE = 4;
+    private final int frameSize;
+    private final int tupleSize;
+    private ByteBuffer buffer;
+    private int tupleCount;
+    private int tupleDataEndOffset;
+
+    public FixedSizeFrameTupleAppender(int frameSize, ITypeTraits[] fields) {
+        this.frameSize = frameSize;
+        int tmp = 0;
+        for (int i = 0; i < fields.length; i++) {
+            tmp += fields[i].getFixedLength();
+        }
+        tupleSize = tmp;
+    }
+
+    public void reset(ByteBuffer buffer, boolean clear) {
+        this.buffer = buffer;
+        if (clear) {
+            buffer.putInt(FrameHelper.getTupleCountOffset(frameSize), 0);
+            tupleCount = 0;
+            tupleDataEndOffset = 0;
+        }
+    }
+
+    public boolean append(byte[] bytes, int offset) {
+        if (tupleDataEndOffset + tupleSize + TUPLE_COUNT_SIZE <= frameSize) {
+            System.arraycopy(bytes, offset, buffer.array(), tupleDataEndOffset, tupleSize);
+            tupleDataEndOffset += tupleSize;
+            tupleCount++;
+            return true;
+        }
+        return false;
+    }
+
+    public boolean append(byte[] bytes, int offset, int length) {
+        if (tupleDataEndOffset + length + TUPLE_COUNT_SIZE <= frameSize) {
+            System.arraycopy(bytes, offset, buffer.array(), tupleDataEndOffset, length);
+            tupleDataEndOffset += length;
+            return true;
+        }
+        return false;
+    }
+
+    public boolean append(int fieldValue) {
+        if (tupleDataEndOffset + 4 + TUPLE_COUNT_SIZE <= frameSize) {
+            buffer.putInt(tupleDataEndOffset, fieldValue);
+            tupleDataEndOffset += 4;
+            tupleCount++;
+            return true;
+        }
+        return false;
+    }
+
+    public boolean append(long fieldValue) {
+        if (tupleDataEndOffset + 8 + TUPLE_COUNT_SIZE <= frameSize) {
+            buffer.putLong(tupleDataEndOffset, fieldValue);
+            tupleDataEndOffset += 8;
+            tupleCount++;
+            return true;
+        }
+        return false;
+    }
+
+    public boolean append(char fieldValue) {
+        if (tupleDataEndOffset + 2 + TUPLE_COUNT_SIZE <= frameSize) {
+            buffer.putLong(tupleDataEndOffset, fieldValue);
+            tupleDataEndOffset += 2;
+            tupleCount++;
+            return true;
+        }
+        return false;
+    }
+
+    public boolean append(byte fieldValue) {
+        if (tupleDataEndOffset + 1 + TUPLE_COUNT_SIZE <= frameSize) {
+            buffer.put(tupleDataEndOffset, fieldValue);
+            tupleDataEndOffset += 1;
+            tupleCount++;
+            return true;
+        }
+        return false;
+    }
+
+    // returns true if an entire tuple fits
+    // returns false otherwise
+    public boolean hasSpace() {
+        return tupleDataEndOffset + tupleSize + TUPLE_COUNT_SIZE <= frameSize;
+    }
+
+    public void incrementTupleCount(int count) {
+        buffer.putInt(FrameHelper.getTupleCountOffset(frameSize),
+                buffer.getInt(FrameHelper.getTupleCountOffset(frameSize)) + count);
+    }
+
+    public int getTupleCount() {
+        return tupleCount;
+    }
+
+    public ByteBuffer getBuffer() {
+        return buffer;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeTupleReference.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeTupleReference.java
new file mode 100644
index 0000000..97f6937
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeTupleReference.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+
+public class FixedSizeTupleReference implements ITupleReference {
+
+    private final ITypeTraits[] typeTraits;
+    private final int[] fieldStartOffsets;
+    private byte[] data;
+    private int startOff;
+
+    public FixedSizeTupleReference(ITypeTraits[] typeTraits) {
+        this.typeTraits = typeTraits;
+        this.fieldStartOffsets = new int[typeTraits.length];
+        this.fieldStartOffsets[0] = 0;
+        for (int i = 1; i < typeTraits.length; i++) {
+            fieldStartOffsets[i] = fieldStartOffsets[i - 1] + typeTraits[i - 1].getFixedLength();
+        }
+    }
+
+    public void reset(byte[] data, int startOff) {
+        this.data = data;
+        this.startOff = startOff;
+    }
+
+    @Override
+    public int getFieldCount() {
+        return typeTraits.length;
+    }
+
+    @Override
+    public byte[] getFieldData(int fIdx) {
+        return data;
+    }
+
+    @Override
+    public int getFieldLength(int fIdx) {
+        return typeTraits[fIdx].getFixedLength();
+    }
+
+    @Override
+    public int getFieldStart(int fIdx) {
+        return startOff + fieldStartOffsets[fIdx];
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndex.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndex.java
new file mode 100644
index 0000000..afeaf90
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndex.java
@@ -0,0 +1,663 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import java.io.DataOutput;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.btree.util.BTreeUtils;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.api.UnsortedInputException;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearcher;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListBuilder;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.exceptions.InvertedIndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.InvertedIndexSearchPredicate;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.TOccurrenceSearcher;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+/**
+ * An inverted index consists of two files: 1. a file storing (paginated)
+ * inverted lists 2. a BTree-file mapping from tokens to inverted lists.
+ * Implemented features: bulk loading and searching (based on T-Occurrence) Not
+ * implemented features: updates (insert/update/delete) Limitations: a query
+ * cannot exceed the size of a Hyracks frame.
+ */
+public class OnDiskInvertedIndex implements IInvertedIndex {
+    protected final IHyracksCommonContext ctx = new DefaultHyracksCommonContext();
+
+    // Schema of BTree tuples, set in constructor.    
+    protected final int invListStartPageIdField;
+    protected final int invListEndPageIdField;
+    protected final int invListStartOffField;
+    protected final int invListNumElementsField;
+
+    // Type traits to be appended to the token type trait which finally form the BTree field type traits.
+    protected static final ITypeTraits[] btreeValueTypeTraits = new ITypeTraits[4];
+    static {
+        // startPageId
+        btreeValueTypeTraits[0] = IntegerPointable.TYPE_TRAITS;
+        // endPageId
+        btreeValueTypeTraits[1] = IntegerPointable.TYPE_TRAITS;
+        // startOff
+        btreeValueTypeTraits[2] = IntegerPointable.TYPE_TRAITS;
+        // numElements
+        btreeValueTypeTraits[3] = IntegerPointable.TYPE_TRAITS;
+    }
+
+    protected BTree btree;
+    protected int rootPageId = 0;
+    protected IBufferCache bufferCache;
+    protected IFileMapProvider fileMapProvider;
+    protected int fileId = -1;
+    protected final ITypeTraits[] invListTypeTraits;
+    protected final IBinaryComparatorFactory[] invListCmpFactories;
+    protected final ITypeTraits[] tokenTypeTraits;
+    protected final IBinaryComparatorFactory[] tokenCmpFactories;
+    protected final IInvertedListBuilder invListBuilder;
+    protected final int numTokenFields;
+    protected final int numInvListKeys;
+    protected final FileReference invListsFile;
+    // Last page id of inverted-lists file (inclusive). Set during bulk load.
+    protected int invListsMaxPageId = -1;
+    protected boolean isOpen = false;
+
+    public OnDiskInvertedIndex(IBufferCache bufferCache, IFileMapProvider fileMapProvider,
+            IInvertedListBuilder invListBuilder, ITypeTraits[] invListTypeTraits,
+            IBinaryComparatorFactory[] invListCmpFactories, ITypeTraits[] tokenTypeTraits,
+            IBinaryComparatorFactory[] tokenCmpFactories, FileReference btreeFile, FileReference invListsFile)
+            throws IndexException {
+        this.bufferCache = bufferCache;
+        this.fileMapProvider = fileMapProvider;
+        this.invListBuilder = invListBuilder;
+        this.invListTypeTraits = invListTypeTraits;
+        this.invListCmpFactories = invListCmpFactories;
+        this.tokenTypeTraits = tokenTypeTraits;
+        this.tokenCmpFactories = tokenCmpFactories;
+        this.btree = BTreeUtils.createBTree(bufferCache, fileMapProvider, getBTreeTypeTraits(tokenTypeTraits),
+                tokenCmpFactories, BTreeLeafFrameType.REGULAR_NSM, btreeFile);
+        this.numTokenFields = btree.getComparatorFactories().length;
+        this.numInvListKeys = invListCmpFactories.length;
+        this.invListsFile = invListsFile;
+        this.invListStartPageIdField = numTokenFields;
+        this.invListEndPageIdField = numTokenFields + 1;
+        this.invListStartOffField = numTokenFields + 2;
+        this.invListNumElementsField = numTokenFields + 3;
+    }
+
+    @Override
+    public synchronized void create() throws HyracksDataException {
+        if (isOpen) {
+            throw new HyracksDataException("Failed to create since index is already open.");
+        }
+        btree.create();
+
+        boolean fileIsMapped = false;
+        synchronized (fileMapProvider) {
+            fileIsMapped = fileMapProvider.isMapped(invListsFile);
+            if (!fileIsMapped) {
+                bufferCache.createFile(invListsFile);
+            }
+            fileId = fileMapProvider.lookupFileId(invListsFile);
+            try {
+                // Also creates the file if it doesn't exist yet.
+                bufferCache.openFile(fileId);
+            } catch (HyracksDataException e) {
+                // Revert state of buffer cache since file failed to open.
+                if (!fileIsMapped) {
+                    bufferCache.deleteFile(fileId, false);
+                }
+                throw e;
+            }
+        }
+        bufferCache.closeFile(fileId);
+    }
+
+    @Override
+    public synchronized void activate() throws HyracksDataException {
+        if (isOpen) {
+            return;
+        }
+
+        btree.activate();
+        boolean fileIsMapped = false;
+        synchronized (fileMapProvider) {
+            fileIsMapped = fileMapProvider.isMapped(invListsFile);
+            if (!fileIsMapped) {
+                bufferCache.createFile(invListsFile);
+            }
+            fileId = fileMapProvider.lookupFileId(invListsFile);
+            try {
+                // Also creates the file if it doesn't exist yet.
+                bufferCache.openFile(fileId);
+            } catch (HyracksDataException e) {
+                // Revert state of buffer cache since file failed to open.
+                if (!fileIsMapped) {
+                    bufferCache.deleteFile(fileId, false);
+                }
+                throw e;
+            }
+        }
+
+        isOpen = true;
+    }
+
+    @Override
+    public synchronized void deactivate() throws HyracksDataException {
+        if (!isOpen) {
+            return;
+        }
+
+        btree.deactivate();
+        bufferCache.closeFile(fileId);
+
+        isOpen = false;
+    }
+
+    @Override
+    public synchronized void destroy() throws HyracksDataException {
+        if (isOpen) {
+            throw new HyracksDataException("Failed to destroy since index is already open.");
+        }
+
+        btree.destroy();
+        invListsFile.delete();
+        if (fileId == -1) {
+            return;
+        }
+
+        bufferCache.deleteFile(fileId, false);
+        fileId = -1;
+    }
+
+    @Override
+    public synchronized void clear() throws HyracksDataException {
+        if (!isOpen) {
+            throw new HyracksDataException("Failed to clear since index is not open.");
+        }
+        btree.clear();
+        bufferCache.closeFile(fileId);
+        bufferCache.deleteFile(fileId, false);
+        invListsFile.getFile().delete();
+
+        boolean fileIsMapped = false;
+        synchronized (fileMapProvider) {
+            fileIsMapped = fileMapProvider.isMapped(invListsFile);
+            if (!fileIsMapped) {
+                bufferCache.createFile(invListsFile);
+            }
+            fileId = fileMapProvider.lookupFileId(invListsFile);
+            try {
+                // Also creates the file if it doesn't exist yet.
+                bufferCache.openFile(fileId);
+            } catch (HyracksDataException e) {
+                // Revert state of buffer cache since file failed to open.
+                if (!fileIsMapped) {
+                    bufferCache.deleteFile(fileId, false);
+                }
+                throw e;
+            }
+        }
+    }
+
+    @Override
+    public IInvertedListCursor createInvertedListCursor() {
+        return new FixedSizeElementInvertedListCursor(bufferCache, fileId, invListTypeTraits);
+    }
+
+    @Override
+    public void openInvertedListCursor(IInvertedListCursor listCursor, ITupleReference searchKey,
+            IIndexOperationContext ictx) throws HyracksDataException, IndexException {
+        OnDiskInvertedIndexOpContext ctx = (OnDiskInvertedIndexOpContext) ictx;
+        ctx.btreePred.setLowKeyComparator(ctx.searchCmp);
+        ctx.btreePred.setHighKeyComparator(ctx.searchCmp);
+        ctx.btreePred.setLowKey(searchKey, true);
+        ctx.btreePred.setHighKey(searchKey, true);
+        ctx.btreeAccessor.search(ctx.btreeCursor, ctx.btreePred);
+        try {
+            if (ctx.btreeCursor.hasNext()) {
+                ctx.btreeCursor.next();
+                resetInvertedListCursor(ctx.btreeCursor.getTuple(), listCursor);
+            } else {
+                listCursor.reset(0, 0, 0, 0);
+            }
+        } finally {
+            ctx.btreeCursor.close();
+            ctx.btreeCursor.reset();
+        }
+    }
+
+    public void resetInvertedListCursor(ITupleReference btreeTuple, IInvertedListCursor listCursor) {
+        int startPageId = IntegerSerializerDeserializer.getInt(btreeTuple.getFieldData(invListStartPageIdField),
+                btreeTuple.getFieldStart(invListStartPageIdField));
+        int endPageId = IntegerSerializerDeserializer.getInt(btreeTuple.getFieldData(invListEndPageIdField),
+                btreeTuple.getFieldStart(invListEndPageIdField));
+        int startOff = IntegerSerializerDeserializer.getInt(btreeTuple.getFieldData(invListStartOffField),
+                btreeTuple.getFieldStart(invListStartOffField));
+        int numElements = IntegerSerializerDeserializer.getInt(btreeTuple.getFieldData(invListNumElementsField),
+                btreeTuple.getFieldStart(invListNumElementsField));
+        listCursor.reset(startPageId, endPageId, startOff, numElements);
+    }
+
+    public final class OnDiskInvertedIndexBulkLoader implements IIndexBulkLoader {
+        private final ArrayTupleBuilder btreeTupleBuilder;
+        private final ArrayTupleReference btreeTupleReference;
+        private final IIndexBulkLoader btreeBulkloader;
+
+        private int currentInvListStartPageId;
+        private int currentInvListStartOffset;
+        private final ArrayTupleBuilder lastTupleBuilder;
+        private final ArrayTupleReference lastTuple;
+
+        private int currentPageId;
+        private ICachedPage currentPage;
+        private final MultiComparator tokenCmp;
+        private final MultiComparator invListCmp;
+
+        private final boolean verifyInput;
+        private final MultiComparator allCmp;
+
+        public OnDiskInvertedIndexBulkLoader(float btreeFillFactor, boolean verifyInput, long numElementsHint,
+                int startPageId, int fileId) throws IndexException, HyracksDataException {
+            this.verifyInput = verifyInput;
+            this.tokenCmp = MultiComparator.create(btree.getComparatorFactories());
+            this.invListCmp = MultiComparator.create(invListCmpFactories);
+            if (verifyInput) {
+                allCmp = MultiComparator.create(btree.getComparatorFactories(), invListCmpFactories);
+            } else {
+                allCmp = null;
+            }
+            this.btreeTupleBuilder = new ArrayTupleBuilder(btree.getFieldCount());
+            this.btreeTupleReference = new ArrayTupleReference();
+            this.lastTupleBuilder = new ArrayTupleBuilder(numTokenFields + numInvListKeys);
+            this.lastTuple = new ArrayTupleReference();
+            this.btreeBulkloader = btree.createBulkLoader(btreeFillFactor, verifyInput, numElementsHint);
+            currentPageId = startPageId;
+            currentPage = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, currentPageId), true);
+            currentPage.acquireWriteLatch();
+            invListBuilder.setTargetBuffer(currentPage.getBuffer().array(), 0);
+        }
+
+        public void pinNextPage() throws HyracksDataException {
+            currentPage.releaseWriteLatch();
+            bufferCache.unpin(currentPage);
+            currentPageId++;
+            currentPage = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, currentPageId), true);
+            currentPage.acquireWriteLatch();
+        }
+
+        private void createAndInsertBTreeTuple() throws IndexException, HyracksDataException {
+            // Build tuple.        
+            btreeTupleBuilder.reset();
+            DataOutput output = btreeTupleBuilder.getDataOutput();
+            // Add key fields.
+            for (int i = 0; i < numTokenFields; i++) {
+                btreeTupleBuilder.addField(lastTuple.getFieldData(i), lastTuple.getFieldStart(i),
+                        lastTuple.getFieldLength(i));
+            }
+            // Add inverted-list 'pointer' value fields.
+            try {
+                output.writeInt(currentInvListStartPageId);
+                btreeTupleBuilder.addFieldEndOffset();
+                output.writeInt(currentPageId);
+                btreeTupleBuilder.addFieldEndOffset();
+                output.writeInt(currentInvListStartOffset);
+                btreeTupleBuilder.addFieldEndOffset();
+                output.writeInt(invListBuilder.getListSize());
+                btreeTupleBuilder.addFieldEndOffset();
+            } catch (IOException e) {
+                throw new HyracksDataException(e);
+            }
+            // Reset tuple reference and add it into the BTree load.
+            btreeTupleReference.reset(btreeTupleBuilder.getFieldEndOffsets(), btreeTupleBuilder.getByteArray());
+            btreeBulkloader.add(btreeTupleReference);
+        }
+
+        /**
+         * Assumptions:
+         * The first btree.getMultiComparator().getKeyFieldCount() fields in tuple
+         * are btree keys (e.g., a string token).
+         * The next invListCmp.getKeyFieldCount() fields in tuple are keys of the
+         * inverted list (e.g., primary key).
+         * Key fields of inverted list are fixed size.
+         */
+        @Override
+        public void add(ITupleReference tuple) throws IndexException, HyracksDataException {
+            boolean firstElement = lastTupleBuilder.getSize() == 0;
+            boolean startNewList = firstElement;
+            if (!firstElement) {
+                // If the current and the last token don't match, we start a new list.
+                lastTuple.reset(lastTupleBuilder.getFieldEndOffsets(), lastTupleBuilder.getByteArray());
+                startNewList = tokenCmp.compare(tuple, lastTuple) != 0;
+            }
+            if (startNewList) {
+                if (!firstElement) {
+                    // Create entry in btree for last inverted list.
+                    createAndInsertBTreeTuple();
+                }
+                if (!invListBuilder.startNewList(tuple, numTokenFields)) {
+                    pinNextPage();
+                    invListBuilder.setTargetBuffer(currentPage.getBuffer().array(), 0);
+                    if (!invListBuilder.startNewList(tuple, numTokenFields)) {
+                        throw new IllegalStateException("Failed to create first inverted list.");
+                    }
+                }
+                currentInvListStartPageId = currentPageId;
+                currentInvListStartOffset = invListBuilder.getPos();
+            } else {
+                if (invListCmp.compare(tuple, lastTuple, numTokenFields) == 0) {
+                    // Duplicate inverted-list element.
+                    return;
+                }
+            }
+
+            // Append to current inverted list.
+            if (!invListBuilder.appendElement(tuple, numTokenFields, numInvListKeys)) {
+                pinNextPage();
+                invListBuilder.setTargetBuffer(currentPage.getBuffer().array(), 0);
+                if (!invListBuilder.appendElement(tuple, numTokenFields, numInvListKeys)) {
+                    throw new IllegalStateException(
+                            "Failed to append element to inverted list after switching to a new page.");
+                }
+            }
+
+            if (verifyInput && lastTupleBuilder.getSize() != 0) {
+                if (allCmp.compare(tuple, lastTuple) <= 0) {
+                    throw new UnsortedInputException(
+                            "Input stream given to OnDiskInvertedIndex bulk load is not sorted.");
+                }
+            }
+
+            // Remember last tuple by creating a copy.
+            // TODO: This portion can be optimized by only copying the token when it changes, and using the last appended inverted-list element as a reference.
+            lastTupleBuilder.reset();
+            for (int i = 0; i < tuple.getFieldCount(); i++) {
+                lastTupleBuilder.addField(tuple.getFieldData(i), tuple.getFieldStart(i), tuple.getFieldLength(i));
+            }
+        }
+
+        @Override
+        public void end() throws IndexException, HyracksDataException {
+            // The last tuple builder is empty if add() was never called.
+            if (lastTupleBuilder.getSize() != 0) {
+                createAndInsertBTreeTuple();
+            }
+            btreeBulkloader.end();
+
+            if (currentPage != null) {
+                currentPage.releaseWriteLatch();
+                bufferCache.unpin(currentPage);
+            }
+            invListsMaxPageId = currentPageId;
+        }
+    }
+
+    @Override
+    public IBufferCache getBufferCache() {
+        return bufferCache;
+    }
+
+    public int getInvListsFileId() {
+        return fileId;
+    }
+
+    public int getInvListsMaxPageId() {
+        return invListsMaxPageId;
+    }
+
+    public IBinaryComparatorFactory[] getInvListCmpFactories() {
+        return invListCmpFactories;
+    }
+
+    public ITypeTraits[] getInvListTypeTraits() {
+        return invListTypeTraits;
+    }
+
+    public BTree getBTree() {
+        return btree;
+    }
+
+    public class OnDiskInvertedIndexAccessor implements IInvertedIndexAccessor {
+        private final OnDiskInvertedIndex index;
+        private final IInvertedIndexSearcher searcher;
+        private final IIndexOperationContext opCtx = new OnDiskInvertedIndexOpContext(btree);
+
+        public OnDiskInvertedIndexAccessor(OnDiskInvertedIndex index) {
+            this.index = index;
+            this.searcher = new TOccurrenceSearcher(ctx, index);
+        }
+
+        // Let subclasses initialize.
+        protected OnDiskInvertedIndexAccessor(OnDiskInvertedIndex index, IInvertedIndexSearcher searcher) {
+            this.index = index;
+            this.searcher = searcher;
+        }
+
+        @Override
+        public IIndexCursor createSearchCursor() {
+            return new OnDiskInvertedIndexSearchCursor(searcher, index.getInvListTypeTraits().length);
+        }
+
+        @Override
+        public void search(IIndexCursor cursor, ISearchPredicate searchPred) throws HyracksDataException,
+                IndexException {
+            searcher.search((OnDiskInvertedIndexSearchCursor) cursor, (InvertedIndexSearchPredicate) searchPred, opCtx);
+        }
+
+        @Override
+        public IInvertedListCursor createInvertedListCursor() {
+            return index.createInvertedListCursor();
+        }
+
+        @Override
+        public void openInvertedListCursor(IInvertedListCursor listCursor, ITupleReference searchKey)
+                throws HyracksDataException, IndexException {
+            index.openInvertedListCursor(listCursor, searchKey, opCtx);
+        }
+
+        @Override
+        public IIndexCursor createRangeSearchCursor() {
+            return new OnDiskInvertedIndexRangeSearchCursor(index, opCtx);
+        }
+
+        @Override
+        public void rangeSearch(IIndexCursor cursor, ISearchPredicate searchPred) throws HyracksDataException,
+                IndexException {
+            OnDiskInvertedIndexRangeSearchCursor rangeSearchCursor = (OnDiskInvertedIndexRangeSearchCursor) cursor;
+            rangeSearchCursor.open(null, searchPred);
+        }
+
+        @Override
+        public void insert(ITupleReference tuple) throws HyracksDataException, IndexException {
+            throw new UnsupportedOperationException("Insert not supported by inverted index.");
+        }
+
+        @Override
+        public void update(ITupleReference tuple) throws HyracksDataException, IndexException {
+            throw new UnsupportedOperationException("Update not supported by inverted index.");
+        }
+
+        @Override
+        public void delete(ITupleReference tuple) throws HyracksDataException, IndexException {
+            throw new UnsupportedOperationException("Delete not supported by inverted index.");
+        }
+
+        @Override
+        public void upsert(ITupleReference tuple) throws HyracksDataException, TreeIndexException {
+            throw new UnsupportedOperationException("Upsert not supported by inverted index.");
+        }
+    }
+
+    @Override
+    public IIndexAccessor createAccessor(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback) {
+        return new OnDiskInvertedIndexAccessor(this);
+    }
+
+    // This is just a dummy hyracks context for allocating frames for temporary
+    // results during inverted index searches.
+    // TODO: In the future we should use the real HyracksTaskContext to track
+    // frame usage.
+    public static class DefaultHyracksCommonContext implements IHyracksCommonContext {
+        private final int FRAME_SIZE = 32768;
+
+        @Override
+        public int getFrameSize() {
+            return FRAME_SIZE;
+        }
+
+        @Override
+        public IIOManager getIOManager() {
+            return null;
+        }
+
+        @Override
+        public ByteBuffer allocateFrame() {
+            return ByteBuffer.allocate(FRAME_SIZE);
+        }
+    }
+
+    @Override
+    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
+            throws IndexException {
+        try {
+            return new OnDiskInvertedIndexBulkLoader(fillFactor, verifyInput, numElementsHint, rootPageId, fileId);
+        } catch (HyracksDataException e) {
+            throw new InvertedIndexException(e);
+        }
+    }
+
+    @Override
+    public void validate() throws HyracksDataException {
+        btree.validate();
+        // Scan the btree and validate the order of elements in each inverted-list.
+        IIndexAccessor btreeAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE,
+                NoOpOperationCallback.INSTANCE);
+        IIndexCursor btreeCursor = btreeAccessor.createSearchCursor();
+        MultiComparator btreeCmp = MultiComparator.createIgnoreFieldLength(btree.getComparatorFactories());
+        RangePredicate rangePred = new RangePredicate(null, null, true, true, btreeCmp, btreeCmp);
+        int[] fieldPermutation = new int[tokenTypeTraits.length];
+        for (int i = 0; i < tokenTypeTraits.length; i++) {
+            fieldPermutation[i] = i;
+        }
+        PermutingTupleReference tokenTuple = new PermutingTupleReference(fieldPermutation);
+
+        IInvertedIndexAccessor invIndexAccessor = (IInvertedIndexAccessor) createAccessor(
+                NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        IInvertedListCursor invListCursor = invIndexAccessor.createInvertedListCursor();
+        MultiComparator invListCmp = MultiComparator.createIgnoreFieldLength(invListCmpFactories);
+
+        try {
+            // Search key for finding an inverted-list in the actual index.
+            ArrayTupleBuilder prevBuilder = new ArrayTupleBuilder(invListTypeTraits.length);
+            ArrayTupleReference prevTuple = new ArrayTupleReference();
+            btreeAccessor.search(btreeCursor, rangePred);
+            while (btreeCursor.hasNext()) {
+                btreeCursor.next();
+                tokenTuple.reset(btreeCursor.getTuple());
+                // Validate inverted list by checking that the elements are totally ordered.
+                invIndexAccessor.openInvertedListCursor(invListCursor, tokenTuple);
+                invListCursor.pinPages();
+                try {
+                    if (invListCursor.hasNext()) {
+                        invListCursor.next();
+                        ITupleReference invListElement = invListCursor.getTuple();
+                        // Initialize prev tuple.
+                        TupleUtils.copyTuple(prevBuilder, invListElement, invListElement.getFieldCount());
+                        prevTuple.reset(prevBuilder.getFieldEndOffsets(), prevBuilder.getByteArray());
+                    }
+                    while (invListCursor.hasNext()) {
+                        invListCursor.next();
+                        ITupleReference invListElement = invListCursor.getTuple();
+                        // Compare with previous element.
+                        if (invListCmp.compare(invListElement, prevTuple) <= 0) {
+                            throw new HyracksDataException("Index validation failed.");
+                        }
+                        // Set new prevTuple.
+                        TupleUtils.copyTuple(prevBuilder, invListElement, invListElement.getFieldCount());
+                        prevTuple.reset(prevBuilder.getFieldEndOffsets(), prevBuilder.getByteArray());
+                    }
+                } finally {
+                    invListCursor.unpinPages();
+                }
+            }
+        } catch (IndexException e) {
+            throw new HyracksDataException(e);
+        } finally {
+            btreeCursor.close();
+        }
+    }
+
+    @Override
+    public long getMemoryAllocationSize() {
+        return 0;
+    }
+
+    protected static ITypeTraits[] getBTreeTypeTraits(ITypeTraits[] tokenTypeTraits) {
+        ITypeTraits[] btreeTypeTraits = new ITypeTraits[tokenTypeTraits.length + btreeValueTypeTraits.length];
+        // Set key type traits.
+        for (int i = 0; i < tokenTypeTraits.length; i++) {
+            btreeTypeTraits[i] = tokenTypeTraits[i];
+        }
+        // Set value type traits.
+        for (int i = 0; i < btreeValueTypeTraits.length; i++) {
+            btreeTypeTraits[i + tokenTypeTraits.length] = btreeValueTypeTraits[i];
+        }
+        return btreeTypeTraits;
+    }
+
+    @Override
+    public ITypeTraits[] getTokenTypeTraits() {
+        return tokenTypeTraits;
+    }
+
+    @Override
+    public IBinaryComparatorFactory[] getTokenCmpFactories() {
+        return tokenCmpFactories;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexFactory.java
new file mode 100644
index 0000000..5401519
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexFactory.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import java.io.File;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.IndexFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexFileNameMapper;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListBuilder;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListBuilderFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class OnDiskInvertedIndexFactory extends IndexFactory<IInvertedIndex> {
+
+    protected final IInvertedListBuilderFactory invListBuilderFactory;
+    protected final ITypeTraits[] invListTypeTraits;
+    protected final IBinaryComparatorFactory[] invListCmpFactories;
+    protected final ITypeTraits[] tokenTypeTraits;
+    protected final IBinaryComparatorFactory[] tokenCmpFactories;
+    protected final IInvertedIndexFileNameMapper fileNameMapper;
+
+    public OnDiskInvertedIndexFactory(IBufferCache bufferCache, IFileMapProvider fileMapProvider,
+            IInvertedListBuilderFactory invListBuilderFactory, ITypeTraits[] invListTypeTraits,
+            IBinaryComparatorFactory[] invListCmpFactories, ITypeTraits[] tokenTypeTraits,
+            IBinaryComparatorFactory[] tokenCmpFactories, IInvertedIndexFileNameMapper fileNameMapper) {
+        super(bufferCache, fileMapProvider, null);
+        this.invListBuilderFactory = invListBuilderFactory;
+        this.invListTypeTraits = invListTypeTraits;
+        this.invListCmpFactories = invListCmpFactories;
+        this.tokenTypeTraits = tokenTypeTraits;
+        this.tokenCmpFactories = tokenCmpFactories;
+        this.fileNameMapper = fileNameMapper;
+    }
+
+    @Override
+    public IInvertedIndex createIndexInstance(FileReference dictBTreeFile) throws IndexException {
+        String invListsFilePath = fileNameMapper.getInvListsFilePath(dictBTreeFile.getFile().getPath());
+        FileReference invListsFile = new FileReference(new File(invListsFilePath));
+        IInvertedListBuilder invListBuilder = invListBuilderFactory.create();
+        return new OnDiskInvertedIndex(bufferCache, fileMapProvider, invListBuilder, invListTypeTraits,
+                invListCmpFactories, tokenTypeTraits, tokenCmpFactories, dictBTreeFile, invListsFile);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexOpContext.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexOpContext.java
new file mode 100644
index 0000000..9e6194e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexOpContext.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+
+public class OnDiskInvertedIndexOpContext implements IIndexOperationContext {
+
+    public final RangePredicate btreePred = new RangePredicate(null, null, true, true, null, null);
+    public IIndexAccessor btreeAccessor;
+    public IIndexCursor btreeCursor;
+    public MultiComparator searchCmp;
+    // For prefix search on partitioned indexes.
+    public MultiComparator prefixSearchCmp;
+
+    public OnDiskInvertedIndexOpContext(BTree btree) {
+        // TODO: Ignore opcallbacks for now.
+        btreeAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        btreeCursor = btreeAccessor.createSearchCursor();
+        searchCmp = MultiComparator.createIgnoreFieldLength(btree.getComparatorFactories());
+        if (btree.getComparatorFactories().length > 1) {
+            prefixSearchCmp = MultiComparator.create(btree.getComparatorFactories(), 0, 1);
+        }
+    }
+
+    @Override
+    public void reset() {
+        // Nothing to be done here, only search operation supported.
+    }
+
+    @Override
+    public void setOperation(IndexOperation newOp) {
+        // Nothing to be done here, only search operation supported.
+    }
+
+    @Override
+    public IndexOperation getOperation() {
+        return IndexOperation.SEARCH;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexRangeSearchCursor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexRangeSearchCursor.java
new file mode 100644
index 0000000..b41b0d1
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexRangeSearchCursor.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.tuples.ConcatenatingTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+
+/**
+ * Scans a range of tokens, returning tuples containing a token and an inverted-list element.
+ */
+public class OnDiskInvertedIndexRangeSearchCursor implements IIndexCursor {
+
+    private final BTree btree;
+    private final IIndexAccessor btreeAccessor;
+    private final IInvertedIndex invIndex;
+    private final IIndexOperationContext opCtx;
+    private final IInvertedListCursor invListCursor;
+    private boolean unpinNeeded;
+    
+    private final IIndexCursor btreeCursor;
+    private RangePredicate btreePred;
+
+    private final PermutingTupleReference tokenTuple;
+    private ConcatenatingTupleReference concatTuple;
+
+    public OnDiskInvertedIndexRangeSearchCursor(IInvertedIndex invIndex, IIndexOperationContext opCtx) {
+        this.btree = ((OnDiskInvertedIndex) invIndex).getBTree();
+        this.btreeAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        this.invIndex = invIndex;
+        this.opCtx = opCtx;
+        // Project away non-token fields of the BTree tuples.
+        int[] fieldPermutation = new int[invIndex.getTokenTypeTraits().length];
+        for (int i = 0; i < invIndex.getTokenTypeTraits().length; i++) {
+            fieldPermutation[i] = i;
+        }
+        tokenTuple = new PermutingTupleReference(fieldPermutation);
+        btreeCursor = btreeAccessor.createSearchCursor();
+        concatTuple = new ConcatenatingTupleReference(2);
+        invListCursor = invIndex.createInvertedListCursor();
+        unpinNeeded = false;
+    }
+
+    @Override
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws HyracksDataException, IndexException {
+        this.btreePred = (RangePredicate) searchPred;
+        try {
+            btreeAccessor.search(btreeCursor, btreePred);
+        } catch (IndexException e) {
+            throw new HyracksDataException(e);
+        }        
+        invListCursor.pinPages();
+        unpinNeeded = true;
+    }
+
+    @Override
+    public boolean hasNext() throws HyracksDataException, IndexException {
+        if (invListCursor.hasNext()) {
+            return true;
+        }
+        if (unpinNeeded) {
+            invListCursor.unpinPages();
+            unpinNeeded = false;
+        }
+        if (!btreeCursor.hasNext()) {
+            return false;
+        }
+        btreeCursor.next();
+        tokenTuple.reset(btreeCursor.getTuple());
+        try {
+            invIndex.openInvertedListCursor(invListCursor, tokenTuple, opCtx);
+        } catch (IndexException e) {
+            throw new HyracksDataException(e);
+        }
+        invListCursor.pinPages();
+        invListCursor.hasNext();
+        unpinNeeded = true;
+        concatTuple.reset();
+        concatTuple.addTuple(tokenTuple);
+        return true;
+    }
+
+    @Override
+    public void next() throws HyracksDataException {
+        invListCursor.next();
+        if (concatTuple.hasMaxTuples()) {
+            concatTuple.removeLastTuple();
+        }
+        concatTuple.addTuple(invListCursor.getTuple());
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        if (unpinNeeded) {
+            invListCursor.unpinPages();
+            unpinNeeded = false;
+        }
+        btreeCursor.close();
+    }
+
+    @Override
+    public void reset() throws HyracksDataException, IndexException {
+        if (unpinNeeded) {
+            invListCursor.unpinPages();
+            unpinNeeded = false;
+        }
+        btreeCursor.close();
+    }
+
+    @Override
+    public ITupleReference getTuple() {
+        return concatTuple;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexSearchCursor.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexSearchCursor.java
new file mode 100644
index 0000000..3060ef4
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexSearchCursor.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import java.nio.ByteBuffer;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearcher;
+
+public class OnDiskInvertedIndexSearchCursor implements IIndexCursor {
+
+    private List<ByteBuffer> resultBuffers;
+    private int numResultBuffers;
+    private int currentBufferIndex = 0;
+    private int tupleIndex = 0;
+    private final IInvertedIndexSearcher invIndexSearcher;
+    private final IFrameTupleAccessor fta;
+    private final FixedSizeTupleReference frameTuple;
+    private final PermutingTupleReference resultTuple;
+    
+    public OnDiskInvertedIndexSearchCursor(IInvertedIndexSearcher invIndexSearcher, int numInvListFields) {
+        this.invIndexSearcher = invIndexSearcher;
+        this.fta = invIndexSearcher.createResultFrameTupleAccessor();
+        this.frameTuple = (FixedSizeTupleReference) invIndexSearcher.createResultFrameTupleReference();
+        // Project away the occurrence count from the result tuples.
+        int[] fieldPermutation = new int[numInvListFields];
+        for (int i = 0; i < numInvListFields; i++) {
+            fieldPermutation[i] = i;
+        }
+        resultTuple = new PermutingTupleReference(fieldPermutation);
+    }
+
+    @Override
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws HyracksDataException {
+        currentBufferIndex = 0;
+        tupleIndex = 0;
+        resultBuffers = invIndexSearcher.getResultBuffers();
+        numResultBuffers = invIndexSearcher.getNumValidResultBuffers();
+        if (numResultBuffers > 0) {
+            fta.reset(resultBuffers.get(0));
+        }
+    }
+    
+    @Override
+    public boolean hasNext() {
+        if (currentBufferIndex < numResultBuffers && tupleIndex < fta.getTupleCount()) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    public void next() {
+        frameTuple.reset(fta.getBuffer().array(), fta.getTupleStartOffset(tupleIndex));
+        resultTuple.reset(frameTuple);
+        tupleIndex++;
+        if (tupleIndex >= fta.getTupleCount()) {
+            if (currentBufferIndex + 1 < numResultBuffers) {
+                currentBufferIndex++;
+                fta.reset(resultBuffers.get(currentBufferIndex));
+                tupleIndex = 0;
+            }
+        }        
+    }
+
+    @Override
+    public ITupleReference getTuple() {
+        return resultTuple;
+    }
+
+    @Override
+    public void reset() {
+        currentBufferIndex = 0;
+        tupleIndex = 0;
+        invIndexSearcher.reset();
+        resultBuffers = invIndexSearcher.getResultBuffers();
+        numResultBuffers = invIndexSearcher.getNumValidResultBuffers();
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        currentBufferIndex = 0;
+        tupleIndex = 0;
+        resultBuffers = null;
+        numResultBuffers = 0;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/PartitionedOnDiskInvertedIndex.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/PartitionedOnDiskInvertedIndex.java
new file mode 100644
index 0000000..6e395e7
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/PartitionedOnDiskInvertedIndex.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import java.util.ArrayList;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.ShortSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearcher;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListBuilder;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IPartitionedInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.InvertedListPartitions;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.PartitionedTOccurrenceSearcher;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class PartitionedOnDiskInvertedIndex extends OnDiskInvertedIndex implements IPartitionedInvertedIndex {
+
+    protected final int PARTITIONING_NUM_TOKENS_FIELD = 1;
+
+    public PartitionedOnDiskInvertedIndex(IBufferCache bufferCache, IFileMapProvider fileMapProvider,
+            IInvertedListBuilder invListBuilder, ITypeTraits[] invListTypeTraits,
+            IBinaryComparatorFactory[] invListCmpFactories, ITypeTraits[] tokenTypeTraits,
+            IBinaryComparatorFactory[] tokenCmpFactories, FileReference btreeFile, FileReference invListsFile)
+            throws IndexException {
+        super(bufferCache, fileMapProvider, invListBuilder, invListTypeTraits, invListCmpFactories, tokenTypeTraits,
+                tokenCmpFactories, btreeFile, invListsFile);
+    }
+
+    public class PartitionedOnDiskInvertedIndexAccessor extends OnDiskInvertedIndexAccessor {
+        public PartitionedOnDiskInvertedIndexAccessor(OnDiskInvertedIndex index) {
+            super(index, new PartitionedTOccurrenceSearcher(ctx, index));
+        }
+    }
+
+    @Override
+    public IIndexAccessor createAccessor(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback) {
+        return new PartitionedOnDiskInvertedIndexAccessor(this);
+    }
+
+    @Override
+    public boolean openInvertedListPartitionCursors(IInvertedIndexSearcher searcher, IIndexOperationContext ictx,
+            short numTokensLowerBound, short numTokensUpperBound, InvertedListPartitions invListPartitions,
+            ArrayList<IInvertedListCursor> cursorsOrderedByTokens) throws HyracksDataException, IndexException {
+        PartitionedTOccurrenceSearcher partSearcher = (PartitionedTOccurrenceSearcher) searcher;
+        OnDiskInvertedIndexOpContext ctx = (OnDiskInvertedIndexOpContext) ictx;
+        ITupleReference lowSearchKey = null;
+        ITupleReference highSearchKey = null;
+        partSearcher.setNumTokensBoundsInSearchKeys(numTokensLowerBound, numTokensUpperBound);
+        if (numTokensLowerBound < 0) {
+            ctx.btreePred.setLowKeyComparator(ctx.prefixSearchCmp);
+            lowSearchKey = partSearcher.getPrefixSearchKey();
+        } else {
+            ctx.btreePred.setLowKeyComparator(ctx.searchCmp);
+            lowSearchKey = partSearcher.getFullLowSearchKey();
+        }
+        if (numTokensUpperBound < 0) {
+            ctx.btreePred.setHighKeyComparator(ctx.prefixSearchCmp);
+            highSearchKey = partSearcher.getPrefixSearchKey();
+        } else {
+            ctx.btreePred.setHighKeyComparator(ctx.searchCmp);
+            highSearchKey = partSearcher.getFullHighSearchKey();
+        }
+        ctx.btreePred.setLowKey(lowSearchKey, true);
+        ctx.btreePred.setHighKey(highSearchKey, true);
+        ctx.btreeAccessor.search(ctx.btreeCursor, ctx.btreePred);
+        boolean tokenExists = false;
+        try {
+            while (ctx.btreeCursor.hasNext()) {
+                ctx.btreeCursor.next();
+                ITupleReference btreeTuple = ctx.btreeCursor.getTuple();
+                short numTokens = ShortSerializerDeserializer.getShort(
+                        btreeTuple.getFieldData(PARTITIONING_NUM_TOKENS_FIELD),
+                        btreeTuple.getFieldStart(PARTITIONING_NUM_TOKENS_FIELD));
+                IInvertedListCursor invListCursor = partSearcher.getCachedInvertedListCursor();
+                resetInvertedListCursor(btreeTuple, invListCursor);
+                cursorsOrderedByTokens.add(invListCursor);
+                invListPartitions.addInvertedListCursor(invListCursor, numTokens);
+                tokenExists = true;
+            }
+        } finally {
+            ctx.btreeCursor.close();
+            ctx.btreeCursor.reset();
+        }
+        return tokenExists;
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return false;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/PartitionedOnDiskInvertedIndexFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/PartitionedOnDiskInvertedIndexFactory.java
new file mode 100644
index 0000000..854a30f
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/PartitionedOnDiskInvertedIndexFactory.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import java.io.File;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexFileNameMapper;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListBuilder;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListBuilderFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class PartitionedOnDiskInvertedIndexFactory extends OnDiskInvertedIndexFactory {
+    
+    public PartitionedOnDiskInvertedIndexFactory(IBufferCache bufferCache, IFileMapProvider fileMapProvider,
+            IInvertedListBuilderFactory invListBuilderFactory, ITypeTraits[] invListTypeTraits,
+            IBinaryComparatorFactory[] invListCmpFactories, ITypeTraits[] tokenTypeTraits,
+            IBinaryComparatorFactory[] tokenCmpFactories, IInvertedIndexFileNameMapper fileNameMapper) {
+        super(bufferCache, fileMapProvider, invListBuilderFactory, invListTypeTraits, invListCmpFactories, tokenTypeTraits,
+                tokenCmpFactories, fileNameMapper);
+    }
+
+    @Override
+    public IInvertedIndex createIndexInstance(FileReference dictBTreeFile) throws IndexException {
+        String invListsFilePath = fileNameMapper.getInvListsFilePath(dictBTreeFile.getFile().getPath());
+        FileReference invListsFile = new FileReference(new File(invListsFilePath));
+        IInvertedListBuilder invListBuilder = invListBuilderFactory.create();
+        return new PartitionedOnDiskInvertedIndex(bufferCache, fileMapProvider, invListBuilder, invListTypeTraits,
+                invListCmpFactories, tokenTypeTraits, tokenCmpFactories, dictBTreeFile, invListsFile);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/AbstractTOccurrenceSearcher.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/AbstractTOccurrenceSearcher.java
new file mode 100644
index 0000000..d973967
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/AbstractTOccurrenceSearcher.java
@@ -0,0 +1,154 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearcher;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IObjectFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.exceptions.OccurrenceThresholdPanicException;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.FixedSizeFrameTupleAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.FixedSizeTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizer;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IToken;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.ObjectCache;
+
+public abstract class AbstractTOccurrenceSearcher implements IInvertedIndexSearcher {
+    protected static final RecordDescriptor QUERY_TOKEN_REC_DESC = new RecordDescriptor(
+            new ISerializerDeserializer[] { UTF8StringSerializerDeserializer.INSTANCE });
+
+    protected final int OBJECT_CACHE_INIT_SIZE = 10;
+    protected final int OBJECT_CACHE_EXPAND_SIZE = 10;
+
+    protected final IHyracksCommonContext ctx;
+
+    protected final InvertedListMerger invListMerger;
+    protected final SearchResult searchResult;
+    protected final IInvertedIndex invIndex;
+    protected final MultiComparator invListCmp;
+
+    protected final ArrayTupleBuilder queryTokenBuilder = new ArrayTupleBuilder(QUERY_TOKEN_REC_DESC.getFieldCount());
+    protected final ByteBuffer queryTokenFrame;
+    protected final FrameTupleAppender queryTokenAppender;
+    protected final FrameTupleAccessor queryTokenAccessor;
+    protected final FrameTupleReference searchKey = new FrameTupleReference();
+
+    protected int occurrenceThreshold;
+
+    protected final IObjectFactory<IInvertedListCursor> invListCursorFactory;
+    protected final ObjectCache<IInvertedListCursor> invListCursorCache;
+
+    public AbstractTOccurrenceSearcher(IHyracksCommonContext ctx, IInvertedIndex invIndex) {
+        this.ctx = ctx;
+        this.invListMerger = new InvertedListMerger(ctx, invIndex);
+        this.searchResult = new SearchResult(invIndex.getInvListTypeTraits(), ctx);
+        this.invIndex = invIndex;
+        this.invListCmp = MultiComparator.create(invIndex.getInvListCmpFactories());
+        this.invListCursorFactory = new InvertedListCursorFactory(invIndex);
+        this.invListCursorCache = new ObjectCache<IInvertedListCursor>(invListCursorFactory, OBJECT_CACHE_INIT_SIZE,
+                OBJECT_CACHE_EXPAND_SIZE);
+        this.queryTokenFrame = ctx.allocateFrame();
+        this.queryTokenAppender = new FrameTupleAppender(ctx.getFrameSize());
+        this.queryTokenAccessor = new FrameTupleAccessor(ctx.getFrameSize(), QUERY_TOKEN_REC_DESC);
+        this.queryTokenAccessor.reset(queryTokenFrame);
+    }
+
+    public void reset() {
+        searchResult.clear();
+        invListMerger.reset();
+    }
+
+    protected void tokenizeQuery(InvertedIndexSearchPredicate searchPred) throws HyracksDataException,
+            OccurrenceThresholdPanicException {
+        ITupleReference queryTuple = searchPred.getQueryTuple();
+        int queryFieldIndex = searchPred.getQueryFieldIndex();
+        IBinaryTokenizer queryTokenizer = searchPred.getQueryTokenizer();
+
+        queryTokenAppender.reset(queryTokenFrame, true);
+        queryTokenizer.reset(queryTuple.getFieldData(queryFieldIndex), queryTuple.getFieldStart(queryFieldIndex),
+                queryTuple.getFieldLength(queryFieldIndex));
+
+        while (queryTokenizer.hasNext()) {
+            queryTokenizer.next();
+            queryTokenBuilder.reset();
+            try {
+                IToken token = queryTokenizer.getToken();
+                token.serializeToken(queryTokenBuilder.getFieldData());
+                queryTokenBuilder.addFieldEndOffset();
+                // WARNING: assuming one frame is big enough to hold all tokens
+                queryTokenAppender.append(queryTokenBuilder.getFieldEndOffsets(), queryTokenBuilder.getByteArray(), 0,
+                        queryTokenBuilder.getSize());
+            } catch (IOException e) {
+                throw new HyracksDataException(e);
+            }
+        }
+    }
+
+    public IFrameTupleAccessor createResultFrameTupleAccessor() {
+        return new FixedSizeFrameTupleAccessor(ctx.getFrameSize(), searchResult.getTypeTraits());
+    }
+
+    public ITupleReference createResultFrameTupleReference() {
+        return new FixedSizeTupleReference(searchResult.getTypeTraits());
+    }
+
+    @Override
+    public List<ByteBuffer> getResultBuffers() {
+        return searchResult.getBuffers();
+    }
+
+    @Override
+    public int getNumValidResultBuffers() {
+        return searchResult.getCurrentBufferIndex() + 1;
+    }
+
+    public int getOccurrenceThreshold() {
+        return occurrenceThreshold;
+    }
+
+    public void printNewResults(int maxResultBufIdx, List<ByteBuffer> buffer) {
+        StringBuffer strBuffer = new StringBuffer();
+        FixedSizeFrameTupleAccessor resultFrameTupleAcc = searchResult.getAccessor();
+        for (int i = 0; i <= maxResultBufIdx; i++) {
+            ByteBuffer testBuf = buffer.get(i);
+            resultFrameTupleAcc.reset(testBuf);
+            for (int j = 0; j < resultFrameTupleAcc.getTupleCount(); j++) {
+                strBuffer.append(IntegerSerializerDeserializer.getInt(resultFrameTupleAcc.getBuffer().array(),
+                        resultFrameTupleAcc.getFieldStartOffset(j, 0)) + ",");
+                strBuffer.append(IntegerSerializerDeserializer.getInt(resultFrameTupleAcc.getBuffer().array(),
+                        resultFrameTupleAcc.getFieldStartOffset(j, 1)) + " ");
+            }
+        }
+        System.out.println(strBuffer.toString());
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ArrayListFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ArrayListFactory.java
new file mode 100644
index 0000000..493063e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ArrayListFactory.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import java.util.ArrayList;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IObjectFactory;
+
+public class ArrayListFactory<T> implements IObjectFactory<ArrayList<T>>{
+    @Override
+    public ArrayList<T> create() {
+        return new ArrayList<T>();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ConjunctiveSearchModifier.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ConjunctiveSearchModifier.java
new file mode 100644
index 0000000..318f1e1
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ConjunctiveSearchModifier.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+
+public class ConjunctiveSearchModifier implements IInvertedIndexSearchModifier {
+
+    @Override
+    public int getOccurrenceThreshold(int numQueryTokens) {
+        return numQueryTokens;
+    }
+
+    @Override
+    public int getNumPrefixLists(int occurrenceThreshold, int numInvLists) {
+        return 1;
+    }
+    
+    @Override
+    public String toString() {
+        return "Conjunctive Search Modifier";
+    }
+
+    @Override
+    public short getNumTokensLowerBound(short numQueryTokens) {
+        return -1;
+    }
+
+    @Override
+    public short getNumTokensUpperBound(short numQueryTokens) {
+        return -1;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ConjunctiveSearchModifierFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ConjunctiveSearchModifierFactory.java
new file mode 100644
index 0000000..83e1f4b
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ConjunctiveSearchModifierFactory.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifierFactory;
+
+public class ConjunctiveSearchModifierFactory implements IInvertedIndexSearchModifierFactory {
+    private static final long serialVersionUID = 1L;
+
+    @Override
+    public IInvertedIndexSearchModifier createSearchModifier() {
+        return new ConjunctiveSearchModifier();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/EditDistanceSearchModifier.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/EditDistanceSearchModifier.java
new file mode 100644
index 0000000..9c06f4d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/EditDistanceSearchModifier.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+
+public class EditDistanceSearchModifier implements IInvertedIndexSearchModifier {
+
+    private int gramLength;
+    private int edThresh;
+
+    public EditDistanceSearchModifier(int gramLength, int edThresh) {
+        this.gramLength = gramLength;
+        this.edThresh = edThresh;
+    }
+
+    @Override
+    public int getOccurrenceThreshold(int numQueryTokens) {
+        return numQueryTokens - edThresh * gramLength;
+    }
+
+    @Override
+    public int getNumPrefixLists(int occurrenceThreshold, int numInvLists) {
+        return numInvLists - occurrenceThreshold + 1;
+    }
+
+    @Override
+    public short getNumTokensLowerBound(short numQueryTokens) {
+        return (short) (numQueryTokens - edThresh);
+    }
+
+    @Override
+    public short getNumTokensUpperBound(short numQueryTokens) {
+        return (short) (numQueryTokens + edThresh);
+    }
+
+    public int getGramLength() {
+        return gramLength;
+    }
+
+    public void setGramLength(int gramLength) {
+        this.gramLength = gramLength;
+    }
+
+    public int getEdThresh() {
+        return edThresh;
+    }
+
+    public void setEdThresh(int edThresh) {
+        this.edThresh = edThresh;
+    }
+
+    @Override
+    public String toString() {
+        return "Edit Distance Search Modifier, GramLen: " + gramLength + ", Threshold: " + edThresh;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/EditDistanceSearchModifierFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/EditDistanceSearchModifierFactory.java
new file mode 100644
index 0000000..879c34e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/EditDistanceSearchModifierFactory.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifierFactory;
+
+public class EditDistanceSearchModifierFactory implements IInvertedIndexSearchModifierFactory {
+
+    private static final long serialVersionUID = 1L;
+
+    private final int gramLength;
+    private final int edThresh;
+    
+    public EditDistanceSearchModifierFactory(int gramLength, int edThresh) {
+        this.gramLength = gramLength;
+        this.edThresh = edThresh;
+    }
+    
+    @Override
+    public IInvertedIndexSearchModifier createSearchModifier() {
+        return new EditDistanceSearchModifier(gramLength, edThresh);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/InvertedIndexSearchPredicate.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/InvertedIndexSearchPredicate.java
new file mode 100644
index 0000000..2065691
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/InvertedIndexSearchPredicate.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizer;
+
+public class InvertedIndexSearchPredicate implements ISearchPredicate {
+    private static final long serialVersionUID = 1L;
+
+    private ITupleReference queryTuple;
+    private int queryFieldIndex;
+    private final IBinaryTokenizer queryTokenizer;
+    private final IInvertedIndexSearchModifier searchModifier;    
+    
+    public InvertedIndexSearchPredicate(IBinaryTokenizer queryTokenizer, IInvertedIndexSearchModifier searchModifier) {
+        this.queryTokenizer = queryTokenizer;
+        this.searchModifier = searchModifier;
+    }
+    
+    public void setQueryTuple(ITupleReference queryTuple) {
+        this.queryTuple = queryTuple;
+    }
+    
+    public ITupleReference getQueryTuple() {
+        return queryTuple;
+    }
+    
+    public void setQueryFieldIndex(int queryFieldIndex) {
+        this.queryFieldIndex = queryFieldIndex;
+    }
+    
+    public int getQueryFieldIndex() {
+        return queryFieldIndex;
+    }
+    
+    public IInvertedIndexSearchModifier getSearchModifier() {
+        return searchModifier;
+    }
+    
+    public IBinaryTokenizer getQueryTokenizer() {
+        return queryTokenizer;
+    }
+    
+    @Override
+    public MultiComparator getLowKeyComparator() {
+        // TODO: This doesn't make sense for an inverted index. Change ISearchPredicate interface.
+        return null;
+    }
+
+    @Override
+    public MultiComparator getHighKeyComparator() {
+        // TODO: This doesn't make sense for an inverted index. Change ISearchPredicate interface.
+        return null;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/InvertedListCursorFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/InvertedListCursorFactory.java
new file mode 100644
index 0000000..b4b3c43
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/InvertedListCursorFactory.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IObjectFactory;
+
+public class InvertedListCursorFactory implements IObjectFactory<IInvertedListCursor> {
+
+    private final IInvertedIndex invIndex;
+
+    public InvertedListCursorFactory(IInvertedIndex invIndex) {
+        this.invIndex = invIndex;
+    }
+
+    @Override
+    public IInvertedListCursor create() {
+        return invIndex.createInvertedListCursor();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/InvertedListMerger.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/InvertedListMerger.java
new file mode 100644
index 0000000..fbdfd64
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/InvertedListMerger.java
@@ -0,0 +1,330 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+
+import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.FixedSizeFrameTupleAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.FixedSizeTupleReference;
+
+// TODO: The merge procedure is rather confusing regarding cursor positions, hasNext() calls etc.
+// Needs an overhaul some time.
+public class InvertedListMerger {
+
+    protected final MultiComparator invListCmp;
+    protected SearchResult prevSearchResult;
+    protected SearchResult newSearchResult;
+
+    public InvertedListMerger(IHyracksCommonContext ctx, IInvertedIndex invIndex) {
+        this.invListCmp = MultiComparator.createIgnoreFieldLength(invIndex.getInvListCmpFactories());
+        this.prevSearchResult = new SearchResult(invIndex.getInvListTypeTraits(), ctx);
+        this.newSearchResult = new SearchResult(prevSearchResult);
+    }
+
+    public void merge(ArrayList<IInvertedListCursor> invListCursors, int occurrenceThreshold, int numPrefixLists,
+            SearchResult searchResult) throws HyracksDataException, IndexException {
+        Collections.sort(invListCursors);
+        int numInvLists = invListCursors.size();
+        SearchResult result = null;
+        for (int i = 0; i < numInvLists; i++) {
+            SearchResult swapTemp = prevSearchResult;
+            prevSearchResult = newSearchResult;
+            newSearchResult = swapTemp;
+            newSearchResult.reset();
+            if (i + 1 != numInvLists) {
+                // Use temporary search results when not merging last list.
+                result = newSearchResult;
+            } else {
+                // When merging the last list, append results to the final search result.
+                result = searchResult;
+            }
+            IInvertedListCursor invListCursor = invListCursors.get(i);
+            invListCursor.pinPages();
+            if (i < numPrefixLists) {
+                // Merge prefix list.
+                mergePrefixList(invListCursor, prevSearchResult, result);
+            } else {
+                // Merge suffix list.
+                int numInvListElements = invListCursor.size();
+                int currentNumResults = prevSearchResult.getNumResults();
+                // Should we binary search the next list or should we sort-merge it?
+                if (currentNumResults * Math.log(numInvListElements) < currentNumResults + numInvListElements) {
+                    mergeSuffixListProbe(invListCursor, prevSearchResult, result, i, numInvLists,
+                            occurrenceThreshold);
+                } else {
+                    mergeSuffixListScan(invListCursor, prevSearchResult, result, i, numInvLists,
+                            occurrenceThreshold);
+                }
+            }
+            invListCursor.unpinPages();
+        }
+    }
+
+    protected void mergeSuffixListProbe(IInvertedListCursor invListCursor, SearchResult prevSearchResult,
+            SearchResult newSearchResult, int invListIx, int numInvLists, int occurrenceThreshold)
+            throws HyracksDataException, IndexException {
+
+        int prevBufIdx = 0;
+        int maxPrevBufIdx = prevSearchResult.getCurrentBufferIndex();
+        ByteBuffer prevCurrentBuffer = prevSearchResult.getBuffers().get(0);
+
+        FixedSizeFrameTupleAccessor resultFrameTupleAcc = prevSearchResult.getAccessor();
+        FixedSizeTupleReference resultTuple = prevSearchResult.getTuple();
+
+        int resultTidx = 0;
+
+        resultFrameTupleAcc.reset(prevCurrentBuffer);
+
+        while (resultTidx < resultFrameTupleAcc.getTupleCount()) {
+
+            resultTuple.reset(prevCurrentBuffer.array(), resultFrameTupleAcc.getTupleStartOffset(resultTidx));
+            int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
+                    resultTuple.getFieldStart(resultTuple.getFieldCount() - 1));
+
+            if (invListCursor.containsKey(resultTuple, invListCmp)) {
+                count++;
+                newSearchResult.append(resultTuple, count);
+            } else {
+                if (count + numInvLists - invListIx > occurrenceThreshold) {
+                    newSearchResult.append(resultTuple, count);
+                }
+            }
+
+            resultTidx++;
+            if (resultTidx >= resultFrameTupleAcc.getTupleCount()) {
+                prevBufIdx++;
+                if (prevBufIdx <= maxPrevBufIdx) {
+                    prevCurrentBuffer = prevSearchResult.getBuffers().get(prevBufIdx);
+                    resultFrameTupleAcc.reset(prevCurrentBuffer);
+                    resultTidx = 0;
+                }
+            }
+        }
+    }
+
+    protected void mergeSuffixListScan(IInvertedListCursor invListCursor, SearchResult prevSearchResult,
+            SearchResult newSearchResult, int invListIx, int numInvLists, int occurrenceThreshold)
+            throws HyracksDataException, IndexException {
+
+        int prevBufIdx = 0;
+        int maxPrevBufIdx = prevSearchResult.getCurrentBufferIndex();
+        ByteBuffer prevCurrentBuffer = prevSearchResult.getBuffers().get(0);
+
+        FixedSizeFrameTupleAccessor resultFrameTupleAcc = prevSearchResult.getAccessor();
+        FixedSizeTupleReference resultTuple = prevSearchResult.getTuple();
+
+        boolean advanceCursor = true;
+        boolean advancePrevResult = false;
+        int resultTidx = 0;
+
+        resultFrameTupleAcc.reset(prevCurrentBuffer);
+
+        int invListTidx = 0;
+        int invListNumTuples = invListCursor.size();
+
+        if (invListCursor.hasNext())
+            invListCursor.next();
+
+        while (invListTidx < invListNumTuples && resultTidx < resultFrameTupleAcc.getTupleCount()) {
+
+            ITupleReference invListTuple = invListCursor.getTuple();
+
+            resultTuple.reset(prevCurrentBuffer.array(), resultFrameTupleAcc.getTupleStartOffset(resultTidx));
+
+            int cmp = invListCmp.compare(invListTuple, resultTuple);
+            if (cmp == 0) {
+                int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
+                        resultTuple.getFieldStart(resultTuple.getFieldCount() - 1)) + 1;
+                newSearchResult.append(resultTuple, count);
+                advanceCursor = true;
+                advancePrevResult = true;
+            } else {
+                if (cmp < 0) {
+                    advanceCursor = true;
+                    advancePrevResult = false;
+                } else {
+                    int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
+                            resultTuple.getFieldStart(resultTuple.getFieldCount() - 1));
+                    if (count + numInvLists - invListIx > occurrenceThreshold) {
+                        newSearchResult.append(resultTuple, count);
+                    }
+                    advanceCursor = false;
+                    advancePrevResult = true;
+                }
+            }
+
+            if (advancePrevResult) {
+                resultTidx++;
+                if (resultTidx >= resultFrameTupleAcc.getTupleCount()) {
+                    prevBufIdx++;
+                    if (prevBufIdx <= maxPrevBufIdx) {
+                        prevCurrentBuffer = prevSearchResult.getBuffers().get(prevBufIdx);
+                        resultFrameTupleAcc.reset(prevCurrentBuffer);
+                        resultTidx = 0;
+                    }
+                }
+            }
+
+            if (advanceCursor) {
+                invListTidx++;
+                if (invListCursor.hasNext()) {
+                    invListCursor.next();
+                }
+            }
+        }
+
+        // append remaining elements from previous result set
+        while (resultTidx < resultFrameTupleAcc.getTupleCount()) {
+
+            resultTuple.reset(prevCurrentBuffer.array(), resultFrameTupleAcc.getTupleStartOffset(resultTidx));
+
+            int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
+                    resultTuple.getFieldStart(resultTuple.getFieldCount() - 1));
+            if (count + numInvLists - invListIx > occurrenceThreshold) {
+                newSearchResult.append(resultTuple, count);
+            }
+
+            resultTidx++;
+            if (resultTidx >= resultFrameTupleAcc.getTupleCount()) {
+                prevBufIdx++;
+                if (prevBufIdx <= maxPrevBufIdx) {
+                    prevCurrentBuffer = prevSearchResult.getBuffers().get(prevBufIdx);
+                    resultFrameTupleAcc.reset(prevCurrentBuffer);
+                    resultTidx = 0;
+                }
+            }
+        }
+    }
+
+    protected void mergePrefixList(IInvertedListCursor invListCursor, SearchResult prevSearchResult,
+            SearchResult newSearchResult) throws HyracksDataException, IndexException {
+
+        int prevBufIdx = 0;
+        int maxPrevBufIdx = prevSearchResult.getCurrentBufferIndex();
+        ByteBuffer prevCurrentBuffer = prevSearchResult.getBuffers().get(0);
+
+        FixedSizeFrameTupleAccessor resultFrameTupleAcc = prevSearchResult.getAccessor();
+        FixedSizeTupleReference resultTuple = prevSearchResult.getTuple();
+
+        boolean advanceCursor = true;
+        boolean advancePrevResult = false;
+        int resultTidx = 0;
+
+        resultFrameTupleAcc.reset(prevCurrentBuffer);
+
+        int invListTidx = 0;
+        int invListNumTuples = invListCursor.size();
+
+        if (invListCursor.hasNext())
+            invListCursor.next();
+
+        while (invListTidx < invListNumTuples && resultTidx < resultFrameTupleAcc.getTupleCount()) {
+
+            ITupleReference invListTuple = invListCursor.getTuple();
+            resultTuple.reset(prevCurrentBuffer.array(), resultFrameTupleAcc.getTupleStartOffset(resultTidx));
+
+            int cmp = invListCmp.compare(invListTuple, resultTuple);
+            if (cmp == 0) {
+                int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
+                        resultTuple.getFieldStart(resultTuple.getFieldCount() - 1)) + 1;
+                newSearchResult.append(resultTuple, count);
+                advanceCursor = true;
+                advancePrevResult = true;
+            } else {
+                if (cmp < 0) {
+                    int count = 1;
+                    newSearchResult.append(invListTuple, count);
+                    advanceCursor = true;
+                    advancePrevResult = false;
+                } else {
+                    int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
+                            resultTuple.getFieldStart(resultTuple.getFieldCount() - 1));
+                    newSearchResult.append(resultTuple, count);
+                    advanceCursor = false;
+                    advancePrevResult = true;
+                }
+            }
+
+            if (advancePrevResult) {
+                resultTidx++;
+                if (resultTidx >= resultFrameTupleAcc.getTupleCount()) {
+                    prevBufIdx++;
+                    if (prevBufIdx <= maxPrevBufIdx) {
+                        prevCurrentBuffer = prevSearchResult.getBuffers().get(prevBufIdx);
+                        resultFrameTupleAcc.reset(prevCurrentBuffer);
+                        resultTidx = 0;
+                    }
+                }
+            }
+
+            if (advanceCursor) {
+                invListTidx++;
+                if (invListCursor.hasNext()) {
+                    invListCursor.next();
+                }
+            }
+        }
+
+        // append remaining new elements from inverted list
+        while (invListTidx < invListNumTuples) {
+            ITupleReference invListTuple = invListCursor.getTuple();
+            newSearchResult.append(invListTuple, 1);
+            invListTidx++;
+            if (invListCursor.hasNext()) {
+                invListCursor.next();
+            }
+        }
+
+        // append remaining elements from previous result set
+        while (resultTidx < resultFrameTupleAcc.getTupleCount()) {
+
+            resultTuple.reset(prevCurrentBuffer.array(), resultFrameTupleAcc.getTupleStartOffset(resultTidx));
+
+            int count = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
+                    resultTuple.getFieldStart(resultTuple.getFieldCount() - 1));
+            newSearchResult.append(resultTuple, count);
+
+            resultTidx++;
+            if (resultTidx >= resultFrameTupleAcc.getTupleCount()) {
+                prevBufIdx++;
+                if (prevBufIdx <= maxPrevBufIdx) {
+                    prevCurrentBuffer = prevSearchResult.getBuffers().get(prevBufIdx);
+                    resultFrameTupleAcc.reset(prevCurrentBuffer);
+                    resultTidx = 0;
+                }
+            }
+        }
+    }
+
+    public SearchResult createSearchResult() {
+        return new SearchResult(prevSearchResult);
+    }
+
+    public void reset() {
+        prevSearchResult.clear();
+        newSearchResult.clear();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/InvertedListPartitions.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/InvertedListPartitions.java
new file mode 100644
index 0000000..1b060e5
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/InvertedListPartitions.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IObjectFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.ObjectCache;
+
+public class InvertedListPartitions {
+    private final int DEFAULT_NUM_PARTITIONS = 10;
+    private final int PARTITIONS_SLACK_SIZE = 10;
+    private final int OBJECT_CACHE_INIT_SIZE = 10;
+    private final int OBJECT_CACHE_EXPAND_SIZE = 10;
+    private final IObjectFactory<ArrayList<IInvertedListCursor>> arrayListFactory;
+    private final ObjectCache<ArrayList<IInvertedListCursor>> arrayListCache;
+    private ArrayList<IInvertedListCursor>[] partitions;
+    private short minValidPartitionIndex;
+    private short maxValidPartitionIndex;
+
+    public InvertedListPartitions() {
+        this.arrayListFactory = new ArrayListFactory<IInvertedListCursor>();
+        this.arrayListCache = new ObjectCache<ArrayList<IInvertedListCursor>>(arrayListFactory, OBJECT_CACHE_INIT_SIZE,
+                OBJECT_CACHE_EXPAND_SIZE);
+    }
+
+    @SuppressWarnings("unchecked")
+    public void reset(short numTokensLowerBound, short numTokensUpperBound) {
+        if (partitions == null) {
+            int initialSize;
+            if (numTokensUpperBound < 0) {
+                initialSize = DEFAULT_NUM_PARTITIONS;
+            } else {
+                initialSize = numTokensUpperBound + 1;
+            }
+            partitions = (ArrayList<IInvertedListCursor>[]) new ArrayList[initialSize];
+        } else {
+            if (numTokensUpperBound + 1 >= partitions.length) {
+                partitions = Arrays.copyOf(partitions, numTokensUpperBound + 1);
+            }
+            Arrays.fill(partitions, null);
+        }
+        arrayListCache.reset();
+        minValidPartitionIndex = Short.MAX_VALUE;
+        maxValidPartitionIndex = Short.MIN_VALUE;
+    }
+
+    public void addInvertedListCursor(IInvertedListCursor listCursor, short numTokens) {
+        if (numTokens + 1 >= partitions.length) {
+            partitions = Arrays.copyOf(partitions, numTokens + PARTITIONS_SLACK_SIZE);
+        }
+        ArrayList<IInvertedListCursor> partitionCursors = partitions[numTokens];
+        if (partitionCursors == null) {
+            partitionCursors = arrayListCache.getNext();
+            partitionCursors.clear();
+            partitions[numTokens] = partitionCursors;
+            // Update range of valid partitions.
+            if (numTokens < minValidPartitionIndex) {
+                minValidPartitionIndex = numTokens;
+            }
+            if (numTokens > maxValidPartitionIndex) {
+                maxValidPartitionIndex = numTokens;
+            }
+        }
+        partitionCursors.add(listCursor);
+    }
+
+    public ArrayList<IInvertedListCursor>[] getPartitions() {
+        return partitions;
+    }
+
+    public short getMinValidPartitionIndex() {
+        return minValidPartitionIndex;
+    }
+
+    public short getMaxValidPartitionIndex() {
+        return maxValidPartitionIndex;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/JaccardSearchModifier.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/JaccardSearchModifier.java
new file mode 100644
index 0000000..ede6041
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/JaccardSearchModifier.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+
+public class JaccardSearchModifier implements IInvertedIndexSearchModifier {
+
+    private float jaccThresh;
+
+    public JaccardSearchModifier(float jaccThresh) {
+        this.jaccThresh = jaccThresh;
+    }
+
+    @Override
+    public int getOccurrenceThreshold(int numQueryTokens) {
+        return Math.max((int) Math.floor((float) numQueryTokens * jaccThresh), 1);
+    }
+
+    @Override
+    public int getNumPrefixLists(int occurrenceThreshold, int numInvLists) {
+        if (numInvLists == 0) {
+            return 0;
+        }
+        return numInvLists - occurrenceThreshold + 1;
+    }
+
+    @Override
+    public short getNumTokensLowerBound(short numQueryTokens) {
+        return (short) Math.floor(numQueryTokens * jaccThresh);
+    }
+
+    @Override
+    public short getNumTokensUpperBound(short numQueryTokens) {
+        return (short) Math.ceil(numQueryTokens / jaccThresh);
+    }
+
+    public float getJaccThresh() {
+        return jaccThresh;
+    }
+
+    public void setJaccThresh(float jaccThresh) {
+        this.jaccThresh = jaccThresh;
+    }
+
+    @Override
+    public String toString() {
+        return "Jaccard Search Modifier, Threshold: " + jaccThresh;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/JaccardSearchModifierFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/JaccardSearchModifierFactory.java
new file mode 100644
index 0000000..270862b
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/JaccardSearchModifierFactory.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifierFactory;
+
+public class JaccardSearchModifierFactory implements IInvertedIndexSearchModifierFactory {
+
+    private static final long serialVersionUID = 1L;
+
+    private final float jaccThresh;
+
+    public JaccardSearchModifierFactory(float jaccThresh) {
+        this.jaccThresh = jaccThresh;
+    }
+
+    @Override
+    public IInvertedIndexSearchModifier createSearchModifier() {
+        return new JaccardSearchModifier(jaccThresh);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ListEditDistanceSearchModifier.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ListEditDistanceSearchModifier.java
new file mode 100644
index 0000000..8ae22a5
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ListEditDistanceSearchModifier.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+
+public class ListEditDistanceSearchModifier implements IInvertedIndexSearchModifier {
+
+    private int edThresh;
+
+    public ListEditDistanceSearchModifier(int edThresh) {
+        this.edThresh = edThresh;
+    }
+
+    public int getEdThresh() {
+        return edThresh;
+    }
+
+    public void setEdThresh(int edThresh) {
+        this.edThresh = edThresh;
+    }
+
+    @Override
+    public int getOccurrenceThreshold(int numQueryTokens) {
+        return numQueryTokens - edThresh;
+    }
+
+    @Override
+    public int getNumPrefixLists(int occurrenceThreshold, int numInvLists) {
+        return numInvLists - occurrenceThreshold + 1;
+    }
+
+    @Override
+    public short getNumTokensLowerBound(short numQueryTokens) {
+        return (short) (numQueryTokens - edThresh);
+    }
+
+    @Override
+    public short getNumTokensUpperBound(short numQueryTokens) {
+        return (short) (numQueryTokens + edThresh);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ListEditDistanceSearchModifierFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ListEditDistanceSearchModifierFactory.java
new file mode 100644
index 0000000..d8f57b1
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/ListEditDistanceSearchModifierFactory.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifierFactory;
+
+public class ListEditDistanceSearchModifierFactory implements IInvertedIndexSearchModifierFactory {
+
+    private static final long serialVersionUID = 1L;
+
+    private final int edThresh;
+
+    public ListEditDistanceSearchModifierFactory(int edThresh) {
+        this.edThresh = edThresh;
+    }
+
+    @Override
+    public IInvertedIndexSearchModifier createSearchModifier() {
+        return new ListEditDistanceSearchModifier(edThresh);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/PartitionedTOccurrenceSearcher.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/PartitionedTOccurrenceSearcher.java
new file mode 100644
index 0000000..3ce1f48
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/PartitionedTOccurrenceSearcher.java
@@ -0,0 +1,189 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import java.io.IOException;
+import java.util.ArrayList;
+
+import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.ShortSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.tuples.ConcatenatingTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IPartitionedInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.exceptions.OccurrenceThresholdPanicException;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.OnDiskInvertedIndexSearchCursor;
+
+public class PartitionedTOccurrenceSearcher extends AbstractTOccurrenceSearcher {
+
+    protected final ArrayTupleBuilder lowerBoundTupleBuilder = new ArrayTupleBuilder(1);
+    protected final ArrayTupleReference lowerBoundTuple = new ArrayTupleReference();
+    protected final ArrayTupleBuilder upperBoundTupleBuilder = new ArrayTupleBuilder(1);
+    protected final ArrayTupleReference upperBoundTuple = new ArrayTupleReference();
+    protected final ConcatenatingTupleReference fullLowSearchKey = new ConcatenatingTupleReference(2);
+    protected final ConcatenatingTupleReference fullHighSearchKey = new ConcatenatingTupleReference(2);
+
+    // Inverted list cursors ordered by token. Used to read relevant inverted-list partitions of one token one after
+    // the other for better I/O performance (because the partitions of one inverted list are stored contiguously in a file).
+    // The above implies that we currently require holding all inverted list for a query in memory.
+    protected final ArrayList<IInvertedListCursor> cursorsOrderedByTokens = new ArrayList<IInvertedListCursor>();
+    protected final InvertedListPartitions partitions = new InvertedListPartitions();
+
+    public PartitionedTOccurrenceSearcher(IHyracksCommonContext ctx, IInvertedIndex invIndex) {
+        super(ctx, invIndex);
+        initHelperTuples();
+    }
+
+    private void initHelperTuples() {
+        try {
+            lowerBoundTupleBuilder.reset();
+            // Write dummy value.
+            lowerBoundTupleBuilder.getDataOutput().writeShort(Short.MIN_VALUE);
+            lowerBoundTupleBuilder.addFieldEndOffset();
+            lowerBoundTuple.reset(lowerBoundTupleBuilder.getFieldEndOffsets(), lowerBoundTupleBuilder.getByteArray());
+            // Only needed for setting the number of fields in searchKey.
+            searchKey.reset(queryTokenAccessor, 0);
+            fullLowSearchKey.reset();
+            fullLowSearchKey.addTuple(searchKey);
+            fullLowSearchKey.addTuple(lowerBoundTuple);
+
+            upperBoundTupleBuilder.reset();
+            // Write dummy value.
+            upperBoundTupleBuilder.getDataOutput().writeShort(Short.MAX_VALUE);
+            upperBoundTupleBuilder.addFieldEndOffset();
+            upperBoundTuple.reset(upperBoundTupleBuilder.getFieldEndOffsets(), upperBoundTupleBuilder.getByteArray());
+            // Only needed for setting the number of fields in searchKey.
+            searchKey.reset(queryTokenAccessor, 0);
+            fullHighSearchKey.reset();
+            fullHighSearchKey.addTuple(searchKey);
+            fullHighSearchKey.addTuple(upperBoundTuple);
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    public void search(OnDiskInvertedIndexSearchCursor resultCursor, InvertedIndexSearchPredicate searchPred,
+            IIndexOperationContext ictx) throws HyracksDataException, IndexException {
+        IPartitionedInvertedIndex partInvIndex = (IPartitionedInvertedIndex) invIndex;
+        searchResult.reset();
+        if (partInvIndex.isEmpty()) {
+            return;
+        }
+        
+        tokenizeQuery(searchPred);
+        short numQueryTokens = (short) queryTokenAccessor.getTupleCount();
+
+        IInvertedIndexSearchModifier searchModifier = searchPred.getSearchModifier();
+        short numTokensLowerBound = searchModifier.getNumTokensLowerBound(numQueryTokens);
+        short numTokensUpperBound = searchModifier.getNumTokensUpperBound(numQueryTokens);
+        
+        occurrenceThreshold = searchModifier.getOccurrenceThreshold(numQueryTokens);
+        if (occurrenceThreshold <= 0) {
+            throw new OccurrenceThresholdPanicException("Merge Threshold is <= 0. Failing Search.");
+        }
+        
+        short maxCountPossible = numQueryTokens;
+        invListCursorCache.reset();
+        partitions.reset(numTokensLowerBound, numTokensUpperBound);
+        cursorsOrderedByTokens.clear();
+        for (int i = 0; i < numQueryTokens; i++) {
+            searchKey.reset(queryTokenAccessor, i);
+            if (!partInvIndex.openInvertedListPartitionCursors(this, ictx, numTokensLowerBound, numTokensUpperBound,
+                    partitions, cursorsOrderedByTokens)) {
+                maxCountPossible--;
+                // No results possible.
+                if (maxCountPossible < occurrenceThreshold) {                    
+                    return;
+                }
+            }
+        }
+        
+        ArrayList<IInvertedListCursor>[] partitionCursors = partitions.getPartitions();
+        short start = partitions.getMinValidPartitionIndex();
+        short end = partitions.getMaxValidPartitionIndex();
+        
+        // Typically, we only enter this case for disk-based inverted indexes. 
+        // TODO: This behavior could potentially lead to a deadlock if we cannot pin 
+        // all inverted lists in memory, and are forced to wait for a page to get evicted
+        // (other concurrent searchers may be in the same situation).
+        // We should detect such cases, then unpin all pages, and then keep retrying to pin until we succeed.
+        // This will require a different "tryPin()" mechanism in the BufferCache that will return false
+        // if we'd have to wait for a page to get evicted.
+        if (!cursorsOrderedByTokens.isEmpty()) {
+            for (int i = start; i <= end; i++) {
+                if (partitionCursors[i] == null) {
+                    continue;
+                }
+                // Prune partition because no element in it can satisfy the occurrence threshold.
+                if (partitionCursors[i].size() < occurrenceThreshold) {
+                    cursorsOrderedByTokens.removeAll(partitionCursors[i]);
+                }
+            }
+            // Pin all the cursors in the order of tokens.
+            int numCursors = cursorsOrderedByTokens.size();
+            for (int i = 0; i < numCursors; i++) {
+                cursorsOrderedByTokens.get(i).pinPages();
+            }
+        }
+        
+        // Process the partitions one-by-one.
+        for (int i = start; i <= end; i++) {
+            if (partitionCursors[i] == null) {
+                continue;
+            }
+            // Prune partition because no element in it can satisfy the occurrence threshold.
+            if (partitionCursors[i].size() < occurrenceThreshold) {
+                continue;
+            }
+            // Merge inverted lists of current partition.
+            int numPrefixLists = searchModifier.getNumPrefixLists(occurrenceThreshold, partitionCursors[i].size());
+            invListMerger.reset();
+            invListMerger.merge(partitionCursors[i], occurrenceThreshold, numPrefixLists, searchResult);
+        }
+        
+        resultCursor.open(null, searchPred);
+    }
+
+    public void setNumTokensBoundsInSearchKeys(short numTokensLowerBound, short numTokensUpperBound) {
+        ShortSerializerDeserializer.putShort(numTokensLowerBound, lowerBoundTuple.getFieldData(0),
+                lowerBoundTuple.getFieldStart(0));
+        ShortSerializerDeserializer.putShort(numTokensUpperBound, upperBoundTuple.getFieldData(0),
+                upperBoundTuple.getFieldStart(0));
+    }
+
+    public ITupleReference getPrefixSearchKey() {
+        return searchKey;
+    }
+
+    public ITupleReference getFullLowSearchKey() {
+        return fullLowSearchKey;
+    }
+
+    public ITupleReference getFullHighSearchKey() {
+        return fullHighSearchKey;
+    }
+
+    public IInvertedListCursor getCachedInvertedListCursor() {
+        return invListCursorCache.getNext();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/SearchResult.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/SearchResult.java
new file mode 100644
index 0000000..aa0d3f2
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/SearchResult.java
@@ -0,0 +1,182 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+
+import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.FixedSizeFrameTupleAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.FixedSizeFrameTupleAppender;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.FixedSizeTupleReference;
+
+/**
+ * Byte-buffer backed storage for intermediate and final results of inverted-index searches.
+ */
+// TODO: Rename members.
+public class SearchResult {
+    protected final ArrayList<ByteBuffer> buffers = new ArrayList<ByteBuffer>();
+    protected final IHyracksCommonContext ctx;
+    protected final FixedSizeFrameTupleAppender appender;
+    protected final FixedSizeFrameTupleAccessor accessor;
+    protected final FixedSizeTupleReference tuple;
+    protected final ITypeTraits[] typeTraits;
+    protected final int invListElementSize;
+
+    protected int currBufIdx;
+    protected int numResults;
+
+    public SearchResult(ITypeTraits[] invListFields, IHyracksCommonContext ctx) {
+        typeTraits = new ITypeTraits[invListFields.length + 1];
+        int tmp = 0;
+        for (int i = 0; i < invListFields.length; i++) {
+            typeTraits[i] = invListFields[i];
+            tmp += invListFields[i].getFixedLength();
+        }
+        invListElementSize = tmp;
+        // Integer for counting occurrences.
+        typeTraits[invListFields.length] = IntegerPointable.TYPE_TRAITS;
+        this.ctx = ctx;
+        appender = new FixedSizeFrameTupleAppender(ctx.getFrameSize(), typeTraits);
+        accessor = new FixedSizeFrameTupleAccessor(ctx.getFrameSize(), typeTraits);
+        tuple = new FixedSizeTupleReference(typeTraits);
+        buffers.add(ctx.allocateFrame());
+    }
+
+    /**
+     * Initialize from other search-result object to share member instances except for result buffers.
+     */
+    public SearchResult(SearchResult other) {
+        this.ctx = other.ctx;
+        this.appender = other.appender;
+        this.accessor = other.accessor;
+        this.tuple = other.tuple;
+        this.typeTraits = other.typeTraits;
+        this.invListElementSize = other.invListElementSize;
+        buffers.add(ctx.allocateFrame());
+    }
+
+    public FixedSizeFrameTupleAccessor getAccessor() {
+        return accessor;
+    }
+
+    public FixedSizeFrameTupleAppender getAppender() {
+        return appender;
+    }
+
+    public FixedSizeTupleReference getTuple() {
+        return tuple;
+    }
+
+    public ArrayList<ByteBuffer> getBuffers() {
+        return buffers;
+    }
+
+    public void reset() {
+        currBufIdx = 0;
+        numResults = 0;
+        appender.reset(buffers.get(0), true);
+    }
+
+    public void clear() {
+        currBufIdx = 0;
+        numResults = 0;
+        for (ByteBuffer buffer : buffers) {
+            appender.reset(buffer, true);
+        }
+    }
+
+    public void append(ITupleReference invListElement, int count) {
+        ByteBuffer currentBuffer = buffers.get(currBufIdx);
+        if (!appender.hasSpace()) {
+            currBufIdx++;
+            if (currBufIdx >= buffers.size()) {
+                buffers.add(ctx.allocateFrame());
+            }
+            currentBuffer = buffers.get(currBufIdx);
+            appender.reset(currentBuffer, true);
+        }
+        // Append inverted-list element.
+        if (!appender.append(invListElement.getFieldData(0), invListElement.getFieldStart(0), invListElementSize)) {
+            throw new IllegalStateException();
+        }
+        // Append count.
+        if (!appender.append(count)) {
+            throw new IllegalStateException();
+        }
+        appender.incrementTupleCount(1);
+        numResults++;
+    }
+
+    public int getCurrentBufferIndex() {
+        return currBufIdx;
+    }
+
+    public ITypeTraits[] getTypeTraits() {
+        return typeTraits;
+    }
+
+    public int getNumResults() {
+        return numResults;
+    }
+
+    // TODO: This code may help to clean up the core list-merging algorithms.
+    /*
+    public SearchResultCursor getCursor() {
+        cursor.reset();
+        return cursor;
+    }
+    
+    public class SearchResultCursor {
+        private int bufferIndex;
+        private int resultIndex;
+        private int frameResultIndex;
+        private ByteBuffer currentBuffer;
+
+        public void reset() {
+            bufferIndex = 0;
+            resultIndex = 0;
+            frameResultIndex = 0;
+            currentBuffer = buffers.get(0);
+            resultFrameTupleAcc.reset(currentBuffer);
+        }
+
+        public boolean hasNext() {
+            return resultIndex < numResults;
+        }
+
+        public void next() {
+            resultTuple.reset(currentBuffer.array(), resultFrameTupleAcc.getTupleStartOffset(frameResultIndex));            
+            if (frameResultIndex < resultFrameTupleAcc.getTupleCount()) {
+                frameResultIndex++;
+            } else {
+                bufferIndex++;
+                currentBuffer = buffers.get(bufferIndex);
+                resultFrameTupleAcc.reset(currentBuffer);
+                frameResultIndex = 0;
+            }            
+            resultIndex++;
+        }
+
+        public ITupleReference getTuple() {
+            return resultTuple;
+        }
+    }
+    */
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/TOccurrenceSearcher.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/TOccurrenceSearcher.java
new file mode 100644
index 0000000..4513540
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/TOccurrenceSearcher.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search;
+
+import java.util.ArrayList;
+
+import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.exceptions.OccurrenceThresholdPanicException;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.OnDiskInvertedIndexSearchCursor;
+
+public class TOccurrenceSearcher extends AbstractTOccurrenceSearcher {
+
+    protected final ArrayList<IInvertedListCursor> invListCursors = new ArrayList<IInvertedListCursor>();
+
+    public TOccurrenceSearcher(IHyracksCommonContext ctx, IInvertedIndex invIndex) {
+        super(ctx, invIndex);
+    }
+
+    public void search(OnDiskInvertedIndexSearchCursor resultCursor, InvertedIndexSearchPredicate searchPred,
+            IIndexOperationContext ictx) throws HyracksDataException, IndexException {
+        tokenizeQuery(searchPred);
+        int numQueryTokens = queryTokenAccessor.getTupleCount();
+
+        invListCursors.clear();
+        invListCursorCache.reset();
+        for (int i = 0; i < numQueryTokens; i++) {
+            searchKey.reset(queryTokenAccessor, i);
+            IInvertedListCursor invListCursor = invListCursorCache.getNext();
+            invIndex.openInvertedListCursor(invListCursor, searchKey, ictx);
+            invListCursors.add(invListCursor);
+        }
+
+        IInvertedIndexSearchModifier searchModifier = searchPred.getSearchModifier();
+        occurrenceThreshold = searchModifier.getOccurrenceThreshold(numQueryTokens);
+        if (occurrenceThreshold <= 0) {
+            throw new OccurrenceThresholdPanicException("Merge threshold is <= 0. Failing Search.");
+        }
+        int numPrefixLists = searchModifier.getNumPrefixLists(occurrenceThreshold, invListCursors.size());
+
+        searchResult.reset();
+        invListMerger.merge(invListCursors, occurrenceThreshold, numPrefixLists, searchResult);
+        resultCursor.open(null, searchPred);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/AbstractUTF8StringBinaryTokenizer.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/AbstractUTF8StringBinaryTokenizer.java
new file mode 100644
index 0000000..7c0ec4d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/AbstractUTF8StringBinaryTokenizer.java
@@ -0,0 +1,77 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+
+public abstract class AbstractUTF8StringBinaryTokenizer implements IBinaryTokenizer {
+
+    protected byte[] data;
+    protected int start;
+    protected int length;
+    protected int tokenLength;
+    protected int index;
+    protected int utf8Length;
+
+    protected final IntArray tokensStart;
+    protected final IntArray tokensLength;
+    protected final IToken token;
+
+    protected final boolean ignoreTokenCount;
+    protected final boolean sourceHasTypeTag;
+
+    public AbstractUTF8StringBinaryTokenizer(boolean ignoreTokenCount, boolean sourceHasTypeTag,
+            ITokenFactory tokenFactory) {
+        this.ignoreTokenCount = ignoreTokenCount;
+        this.sourceHasTypeTag = sourceHasTypeTag;
+        if (!ignoreTokenCount) {
+            tokensStart = new IntArray();
+            tokensLength = new IntArray();
+        } else {
+            tokensStart = null;
+            tokensLength = null;
+        }
+        token = tokenFactory.createToken();
+    }
+
+    @Override
+    public IToken getToken() {
+        return token;
+    }
+
+    @Override
+    public void reset(byte[] data, int start, int length) {
+        this.start = start;
+        index = this.start;
+        if (sourceHasTypeTag) {
+            index++; // skip type tag
+        }
+        utf8Length = UTF8StringPointable.getUTFLength(data, index);
+        index += 2; // skip utf8 length indicator
+        this.data = data;
+        this.length = length + start;
+
+        tokenLength = 0;
+        if (!ignoreTokenCount) {
+            tokensStart.reset();
+            tokensLength.reset();
+        }
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/AbstractUTF8Token.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/AbstractUTF8Token.java
new file mode 100644
index 0000000..c9b6e1f
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/AbstractUTF8Token.java
@@ -0,0 +1,105 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+import edu.uci.ics.hyracks.data.std.util.GrowableArray;
+
+public abstract class AbstractUTF8Token implements IToken {
+    public static final int GOLDEN_RATIO_32 = 0x09e3779b9;
+
+    protected int length;
+    protected int tokenLength;
+    protected int start;
+    protected int tokenCount;
+    protected byte[] data;
+    protected final byte tokenTypeTag;
+    protected final byte countTypeTag;
+
+    public AbstractUTF8Token() {
+        tokenTypeTag = -1;
+        countTypeTag = -1;
+    }
+
+    public AbstractUTF8Token(byte tokenTypeTag, byte countTypeTag) {
+        this.tokenTypeTag = tokenTypeTag;
+        this.countTypeTag = countTypeTag;
+    }
+
+    @Override
+    public byte[] getData() {
+        return data;
+    }
+
+    @Override
+    public int getLength() {
+        return length;
+    }
+
+    public int getLowerCaseUTF8Len(int size) {
+        int lowerCaseUTF8Len = 0;
+        int pos = start;
+        for (int i = 0; i < size; i++) {
+            char c = Character.toLowerCase(UTF8StringPointable.charAt(data, pos));
+            lowerCaseUTF8Len += UTF8StringPointable.getModifiedUTF8Len(c);
+            pos += UTF8StringPointable.charSize(data, pos);
+        }
+        return lowerCaseUTF8Len;
+    }
+
+    @Override
+    public int getStart() {
+        return start;
+    }
+
+    @Override
+    public int getTokenLength() {
+        return tokenLength;
+    }
+
+    public void handleCountTypeTag(DataOutput dos) throws IOException {
+        if (countTypeTag > 0) {
+            dos.write(countTypeTag);
+        }
+    }
+
+    public void handleTokenTypeTag(DataOutput dos) throws IOException {
+        if (tokenTypeTag > 0) {
+            dos.write(tokenTypeTag);
+        }
+    }
+
+    @Override
+    public void reset(byte[] data, int start, int length, int tokenLength, int tokenCount) {
+        this.data = data;
+        this.start = start;
+        this.length = length;
+        this.tokenLength = tokenLength;
+        this.tokenCount = tokenCount;
+    }
+
+    @Override
+    public void serializeTokenCount(GrowableArray out) throws IOException {
+        handleCountTypeTag(out.getDataOutput());
+        out.getDataOutput().writeInt(tokenCount);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/AbstractUTF8TokenFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/AbstractUTF8TokenFactory.java
new file mode 100644
index 0000000..1507613
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/AbstractUTF8TokenFactory.java
@@ -0,0 +1,36 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+public abstract class AbstractUTF8TokenFactory implements ITokenFactory {
+	private static final long serialVersionUID = 1L;
+	protected final byte tokenTypeTag;
+	protected final byte countTypeTag;
+
+	public AbstractUTF8TokenFactory() {
+		tokenTypeTag = -1;
+		countTypeTag = -1;
+	}
+
+	public AbstractUTF8TokenFactory(byte tokenTypeTag, byte countTypeTag) {
+		this.tokenTypeTag = tokenTypeTag;
+		this.countTypeTag = countTypeTag;
+	}
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/DelimitedUTF8StringBinaryTokenizer.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/DelimitedUTF8StringBinaryTokenizer.java
new file mode 100644
index 0000000..4c11523
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/DelimitedUTF8StringBinaryTokenizer.java
@@ -0,0 +1,81 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+
+public class DelimitedUTF8StringBinaryTokenizer extends AbstractUTF8StringBinaryTokenizer {
+
+    public DelimitedUTF8StringBinaryTokenizer(boolean ignoreTokenCount, boolean sourceHasTypeTag,
+            ITokenFactory tokenFactory) {
+        super(ignoreTokenCount, sourceHasTypeTag, tokenFactory);
+    }
+
+    @Override
+    public boolean hasNext() {
+        // skip delimiters
+        while (index < length && isSeparator(UTF8StringPointable.charAt(data, index))) {
+            index += UTF8StringPointable.charSize(data, index);
+        }
+        return index < length;
+    }
+
+    private boolean isSeparator(char c) {
+        return !(Character.isLetterOrDigit(c) || Character.getType(c) == Character.OTHER_LETTER || Character.getType(c) == Character.OTHER_NUMBER);
+    }
+
+    @Override
+    public void next() {
+        tokenLength = 0;
+        int currentTokenStart = index;
+        while (index < length && !isSeparator(UTF8StringPointable.charAt(data, index))) {
+            index += UTF8StringPointable.charSize(data, index);
+            tokenLength++;
+        }
+        int tokenCount = 1;
+        if (tokenLength > 0 && !ignoreTokenCount) {
+            // search if we got the same token before
+            for (int i = 0; i < tokensStart.length(); ++i) {
+                if (tokenLength == tokensLength.get(i)) {
+                    int tokenStart = tokensStart.get(i);
+                    tokenCount++; // assume we found it
+                    int offset = 0;
+                    int currLength = 0;
+                    while (currLength < tokenLength) {
+                        // case insensitive comparison
+                        if (Character.toLowerCase(UTF8StringPointable.charAt(data, currentTokenStart + offset)) != Character
+                                .toLowerCase(UTF8StringPointable.charAt(data, tokenStart + offset))) {
+                            tokenCount--;
+                            break;
+                        }
+                        offset += UTF8StringPointable.charSize(data, currentTokenStart + offset);
+                        currLength++;
+                    }
+                }
+            }
+            // add the new token to the list of seen tokens
+            tokensStart.add(currentTokenStart);
+            tokensLength.add(tokenLength);
+        }
+
+        // set token
+        token.reset(data, currentTokenStart, index, tokenLength, tokenCount);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/DelimitedUTF8StringBinaryTokenizerFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/DelimitedUTF8StringBinaryTokenizerFactory.java
new file mode 100644
index 0000000..08b962b
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/DelimitedUTF8StringBinaryTokenizerFactory.java
@@ -0,0 +1,42 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+public class DelimitedUTF8StringBinaryTokenizerFactory implements
+		IBinaryTokenizerFactory {
+
+	private static final long serialVersionUID = 1L;
+	private final boolean ignoreTokenCount;
+	private final boolean sourceHasTypeTag;
+	private final ITokenFactory tokenFactory;
+
+	public DelimitedUTF8StringBinaryTokenizerFactory(boolean ignoreTokenCount,
+			boolean sourceHasTypeTag, ITokenFactory tokenFactory) {
+		this.ignoreTokenCount = ignoreTokenCount;
+		this.sourceHasTypeTag = sourceHasTypeTag;
+		this.tokenFactory = tokenFactory;
+	}
+
+	@Override
+	public IBinaryTokenizer createTokenizer() {
+		return new DelimitedUTF8StringBinaryTokenizer(ignoreTokenCount,
+				sourceHasTypeTag, tokenFactory);
+	}
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/HashedUTF8NGramToken.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/HashedUTF8NGramToken.java
new file mode 100644
index 0000000..632bf9a
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/HashedUTF8NGramToken.java
@@ -0,0 +1,64 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+import edu.uci.ics.hyracks.data.std.util.GrowableArray;
+
+public class HashedUTF8NGramToken extends UTF8NGramToken {
+    public HashedUTF8NGramToken(byte tokenTypeTag, byte countTypeTag) {
+        super(tokenTypeTag, countTypeTag);
+    }
+
+    @Override
+    public void serializeToken(GrowableArray out) throws IOException {
+        handleTokenTypeTag(out.getDataOutput());
+
+        int hash = GOLDEN_RATIO_32;
+
+        // pre chars
+        for (int i = 0; i < numPreChars; i++) {
+            hash ^= PRECHAR;
+            hash *= GOLDEN_RATIO_32;
+        }
+
+        // regular chars
+        int numRegGrams = tokenLength - numPreChars - numPostChars;
+        int pos = start;
+        for (int i = 0; i < numRegGrams; i++) {
+            hash ^= Character.toLowerCase(UTF8StringPointable.charAt(data, pos));
+            hash *= GOLDEN_RATIO_32;
+            pos += UTF8StringPointable.charSize(data, pos);
+        }
+
+        // post chars
+        for (int i = 0; i < numPostChars; i++) {
+            hash ^= POSTCHAR;
+            hash *= GOLDEN_RATIO_32;
+        }
+
+        // token count
+        hash += tokenCount;
+
+        out.getDataOutput().writeInt(hash);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/HashedUTF8NGramTokenFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/HashedUTF8NGramTokenFactory.java
new file mode 100644
index 0000000..e1d8e31
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/HashedUTF8NGramTokenFactory.java
@@ -0,0 +1,38 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+public class HashedUTF8NGramTokenFactory extends AbstractUTF8TokenFactory {
+
+	private static final long serialVersionUID = 1L;
+
+	public HashedUTF8NGramTokenFactory() {
+		super();
+	}
+
+	public HashedUTF8NGramTokenFactory(byte tokenTypeTag, byte countTypeTag) {
+		super(tokenTypeTag, countTypeTag);
+	}
+
+	@Override
+	public IToken createToken() {
+		return new HashedUTF8NGramToken(tokenTypeTag, countTypeTag);
+	}
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/HashedUTF8WordToken.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/HashedUTF8WordToken.java
new file mode 100644
index 0000000..32954f9
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/HashedUTF8WordToken.java
@@ -0,0 +1,87 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+import edu.uci.ics.hyracks.data.std.util.GrowableArray;
+
+public class HashedUTF8WordToken extends UTF8WordToken {
+
+    private int hash = 0;
+
+    public HashedUTF8WordToken(byte tokenTypeTag, byte countTypeTag) {
+        super(tokenTypeTag, countTypeTag);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (o == null) {
+            return false;
+        }
+        if (!(o instanceof IToken)) {
+            return false;
+        }
+        IToken t = (IToken) o;
+        if (t.getTokenLength() != tokenLength) {
+            return false;
+        }
+        int offset = 0;
+        for (int i = 0; i < tokenLength; i++) {
+            if (UTF8StringPointable.charAt(t.getData(), t.getStart() + offset) != UTF8StringPointable.charAt(data,
+                    start + offset)) {
+                return false;
+            }
+            offset += UTF8StringPointable.charSize(data, start + offset);
+        }
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        return hash;
+    }
+
+    @Override
+    public void reset(byte[] data, int start, int length, int tokenLength, int tokenCount) {
+        super.reset(data, start, length, tokenLength, tokenCount);
+
+        // pre-compute hash value using JAQL-like string hashing
+        int pos = start;
+        hash = GOLDEN_RATIO_32;
+        for (int i = 0; i < tokenLength; i++) {
+            hash ^= Character.toLowerCase(UTF8StringPointable.charAt(data, pos));
+            hash *= GOLDEN_RATIO_32;
+            pos += UTF8StringPointable.charSize(data, pos);
+        }
+        hash += tokenCount;
+    }
+
+    @Override
+    public void serializeToken(GrowableArray out) throws IOException {
+        if (tokenTypeTag > 0) {
+            out.getDataOutput().write(tokenTypeTag);
+        }
+
+        // serialize hash value
+        out.getDataOutput().writeInt(hash);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/HashedUTF8WordTokenFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/HashedUTF8WordTokenFactory.java
new file mode 100644
index 0000000..a4788c4
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/HashedUTF8WordTokenFactory.java
@@ -0,0 +1,38 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+public class HashedUTF8WordTokenFactory extends AbstractUTF8TokenFactory {
+
+	private static final long serialVersionUID = 1L;
+
+	public HashedUTF8WordTokenFactory() {
+		super();
+	}
+
+	public HashedUTF8WordTokenFactory(byte tokenTypeTag, byte countTypeTag) {
+		super(tokenTypeTag, countTypeTag);
+	}
+
+	@Override
+	public IToken createToken() {
+		return new HashedUTF8WordToken(tokenTypeTag, countTypeTag);
+	}
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/IBinaryTokenizer.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/IBinaryTokenizer.java
new file mode 100644
index 0000000..f88e744
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/IBinaryTokenizer.java
@@ -0,0 +1,30 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+public interface IBinaryTokenizer {
+	public IToken getToken();
+
+	public boolean hasNext();
+
+	public void next();
+
+	public void reset(byte[] data, int start, int length);
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/IBinaryTokenizerFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/IBinaryTokenizerFactory.java
new file mode 100644
index 0000000..5890124
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/IBinaryTokenizerFactory.java
@@ -0,0 +1,26 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+import java.io.Serializable;
+
+public interface IBinaryTokenizerFactory extends Serializable {
+	public IBinaryTokenizer createTokenizer();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/INGramToken.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/INGramToken.java
new file mode 100644
index 0000000..40351c4
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/INGramToken.java
@@ -0,0 +1,28 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+public interface INGramToken {
+	public int getNumPostChars();
+
+	public int getNumPreChars();
+
+	public void setNumPrePostChars(int numPreChars, int numPostChars);
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/IToken.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/IToken.java
new file mode 100644
index 0000000..7b1a130
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/IToken.java
@@ -0,0 +1,41 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.data.std.util.GrowableArray;
+
+public interface IToken {
+	public byte[] getData();
+
+	public int getLength();
+
+	public int getStart();
+
+	public int getTokenLength();
+
+	public void reset(byte[] data, int start, int length, int tokenLength,
+			int tokenCount);
+
+	public void serializeToken(GrowableArray out) throws IOException;
+
+	public void serializeTokenCount(GrowableArray out) throws IOException;
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/ITokenFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/ITokenFactory.java
new file mode 100644
index 0000000..5765263
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/ITokenFactory.java
@@ -0,0 +1,26 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+import java.io.Serializable;
+
+public interface ITokenFactory extends Serializable {
+    public IToken createToken();
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/IntArray.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/IntArray.java
new file mode 100644
index 0000000..6bae90b
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/IntArray.java
@@ -0,0 +1,80 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Rares Vernica <rares (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+import java.util.Arrays;
+
+public class IntArray {
+    private static final int SIZE = 128;
+
+    private int[] data;
+    private int length;
+
+    public IntArray() {
+        data = new int[SIZE];
+        length = 0;
+    }
+
+    public void add(int d) {
+        if (length == data.length) {
+            data = Arrays.copyOf(data, data.length << 1);
+        }
+        data[length++] = d;
+    }
+
+    public int[] get() {
+        return data;
+    }
+
+    public int get(int i) {
+        return data[i];
+    }
+
+    public int length() {
+        return length;
+    }
+
+    public void reset() {
+        length = 0;
+    }
+
+    public void sort() {
+        sort(0, length);
+    }
+
+    public void sort(int start, int end) {
+        Arrays.sort(data, start, end);
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder out = new StringBuilder();
+        out.append('[');
+        for (int i = 0; i < length; ++i) {
+            out.append(data[i]);
+            if (i < length - 1) {
+                out.append(',');
+                out.append(' ');
+            }
+        }
+        out.append(']');
+        return out.toString();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/NGramUTF8StringBinaryTokenizer.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/NGramUTF8StringBinaryTokenizer.java
new file mode 100644
index 0000000..0af0335
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/NGramUTF8StringBinaryTokenizer.java
@@ -0,0 +1,118 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+
+public class NGramUTF8StringBinaryTokenizer extends AbstractUTF8StringBinaryTokenizer {
+
+    private int gramLength;
+    private boolean usePrePost;
+
+    private int gramNum;
+    private int totalGrams;
+
+    private final INGramToken concreteToken;
+
+    public NGramUTF8StringBinaryTokenizer(int gramLength, boolean usePrePost, boolean ignoreTokenCount,
+            boolean sourceHasTypeTag, ITokenFactory tokenFactory) {
+        super(ignoreTokenCount, sourceHasTypeTag, tokenFactory);
+        this.gramLength = gramLength;
+        this.usePrePost = usePrePost;
+        concreteToken = (INGramToken) token;
+    }
+
+    @Override
+    public boolean hasNext() {
+        if (gramNum < totalGrams) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    public void next() {
+        int currentTokenStart = index;
+        int tokenCount = 1;
+        int numPreChars = 0;
+        int numPostChars = 0;
+        if (usePrePost) {
+            numPreChars = Math.max(gramLength - gramNum - 1, 0);
+            numPostChars = (gramNum > totalGrams - gramLength) ? gramLength - totalGrams + gramNum : 0;
+        }
+        gramNum++;
+
+        concreteToken.setNumPrePostChars(numPreChars, numPostChars);
+        if (numPreChars == 0) {
+            index += UTF8StringPointable.charSize(data, index);
+        }
+
+        // compute token count
+        // ignore pre and post grams for duplicate detection
+        if (!ignoreTokenCount && numPreChars == 0 && numPostChars == 0) {
+            int tmpIndex = start;
+            while (tmpIndex < currentTokenStart) {
+                tokenCount++; // assume found
+                int offset = 0;
+                for (int j = 0; j < gramLength; j++) {
+                    if (Character.toLowerCase(UTF8StringPointable.charAt(data, currentTokenStart + offset)) != Character
+                            .toLowerCase(UTF8StringPointable.charAt(data, tmpIndex + offset))) {
+                        tokenCount--;
+                        break;
+                    }
+                    offset += UTF8StringPointable.charSize(data, tmpIndex + offset);
+                }
+                tmpIndex += UTF8StringPointable.charSize(data, tmpIndex);
+            }
+        }
+
+        // set token
+        token.reset(data, currentTokenStart, length, gramLength, tokenCount);
+    }
+
+    @Override
+    public void reset(byte[] data, int start, int length) {
+        super.reset(data, start, length);
+        gramNum = 0;
+
+        int numChars = 0;
+        int pos = index;
+        int end = pos + utf8Length;
+        while (pos < end) {
+            numChars++;
+            pos += UTF8StringPointable.charSize(data, pos);
+        }
+
+        if (usePrePost) {
+            totalGrams = numChars + gramLength - 1;
+        } else {
+            totalGrams = numChars - gramLength + 1;
+        }
+    }
+
+    public void setGramlength(int gramLength) {
+        this.gramLength = gramLength;
+    }
+
+    public void setPrePost(boolean usePrePost) {
+        this.usePrePost = usePrePost;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/NGramUTF8StringBinaryTokenizerFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/NGramUTF8StringBinaryTokenizerFactory.java
new file mode 100644
index 0000000..da3d411
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/NGramUTF8StringBinaryTokenizerFactory.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+public class NGramUTF8StringBinaryTokenizerFactory implements IBinaryTokenizerFactory {
+
+    private static final long serialVersionUID = 1L;
+    private final int gramLength;
+    private final boolean usePrePost;
+    private final boolean ignoreTokenCount;
+    private final boolean sourceHasTypeTag;
+    private final ITokenFactory tokenFactory;
+
+    public NGramUTF8StringBinaryTokenizerFactory(int gramLength, boolean usePrePost, boolean ignoreTokenCount,
+            boolean sourceHasTypeTag, ITokenFactory tokenFactory) {
+        this.gramLength = gramLength;
+        this.usePrePost = usePrePost;
+        this.ignoreTokenCount = ignoreTokenCount;
+        this.sourceHasTypeTag = sourceHasTypeTag;
+        this.tokenFactory = tokenFactory;
+    }
+
+    @Override
+    public IBinaryTokenizer createTokenizer() {
+        return new NGramUTF8StringBinaryTokenizer(gramLength, usePrePost, ignoreTokenCount, sourceHasTypeTag,
+                tokenFactory);
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/UTF8NGramToken.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/UTF8NGramToken.java
new file mode 100644
index 0000000..8713499
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/UTF8NGramToken.java
@@ -0,0 +1,91 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+import edu.uci.ics.hyracks.data.std.util.GrowableArray;
+import edu.uci.ics.hyracks.dataflow.common.data.util.StringUtils;
+
+public class UTF8NGramToken extends AbstractUTF8Token implements INGramToken {
+
+    public final static char PRECHAR = '#';
+
+    public final static char POSTCHAR = '$';
+
+    protected int numPreChars;
+    protected int numPostChars;
+
+    public UTF8NGramToken(byte tokenTypeTag, byte countTypeTag) {
+        super(tokenTypeTag, countTypeTag);
+    }
+
+    @Override
+    public int getNumPostChars() {
+        return numPreChars;
+    }
+
+    @Override
+    public int getNumPreChars() {
+        return numPostChars;
+    }
+
+    @Override
+    public void serializeToken(GrowableArray out) throws IOException {
+        handleTokenTypeTag(out.getDataOutput());
+        int tokenUTF8LenOff = out.getLength();
+
+        // regular chars
+        int numRegChars = tokenLength - numPreChars - numPostChars;
+
+        // assuming pre and post char need 1-byte each in utf8
+        int tokenUTF8Len = numPreChars + numPostChars;
+
+        // Write dummy UTF length which will be correctly set later.
+        out.getDataOutput().writeShort(0);
+
+        // pre chars
+        for (int i = 0; i < numPreChars; i++) {
+            StringUtils.writeCharAsModifiedUTF8(PRECHAR, out.getDataOutput());
+        }
+
+        int pos = start;
+        for (int i = 0; i < numRegChars; i++) {
+            char c = Character.toLowerCase(UTF8StringPointable.charAt(data, pos));
+            tokenUTF8Len += StringUtils.writeCharAsModifiedUTF8(c, out.getDataOutput());
+            pos += UTF8StringPointable.charSize(data, pos);
+        }
+
+        // post chars
+        for (int i = 0; i < numPostChars; i++) {
+            StringUtils.writeCharAsModifiedUTF8(POSTCHAR, out.getDataOutput());
+        }
+
+        // Set UTF length of token.
+        out.getByteArray()[tokenUTF8LenOff] = (byte) ((tokenUTF8Len >>> 8) & 0xFF);
+        out.getByteArray()[tokenUTF8LenOff + 1] = (byte) ((tokenUTF8Len >>> 0) & 0xFF);
+    }
+
+    public void setNumPrePostChars(int numPreChars, int numPostChars) {
+        this.numPreChars = numPreChars;
+        this.numPostChars = numPostChars;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/UTF8NGramTokenFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/UTF8NGramTokenFactory.java
new file mode 100644
index 0000000..d26a409
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/UTF8NGramTokenFactory.java
@@ -0,0 +1,39 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+public class UTF8NGramTokenFactory extends AbstractUTF8TokenFactory {
+
+	private static final long serialVersionUID = 1L;
+
+	public UTF8NGramTokenFactory() {
+		super();
+	}
+
+	public UTF8NGramTokenFactory(byte tokenTypeTag, byte countTypeTag) {
+		super(tokenTypeTag, countTypeTag);
+	}
+
+	@Override
+	public IToken createToken() {
+		return new UTF8NGramToken(tokenTypeTag, countTypeTag);
+	}
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/UTF8WordToken.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/UTF8WordToken.java
new file mode 100644
index 0000000..dbfc76f
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/UTF8WordToken.java
@@ -0,0 +1,51 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+import edu.uci.ics.hyracks.data.std.util.GrowableArray;
+import edu.uci.ics.hyracks.dataflow.common.data.util.StringUtils;
+
+public class UTF8WordToken extends AbstractUTF8Token {
+
+    public UTF8WordToken(byte tokenTypeTag, byte countTypeTag) {
+        super(tokenTypeTag, countTypeTag);
+    }
+
+    @Override
+    public void serializeToken(GrowableArray out) throws IOException {
+        handleTokenTypeTag(out.getDataOutput());
+        int tokenUTF8LenOff = out.getLength();
+        int tokenUTF8Len = 0;
+        // Write dummy UTF length which will be correctly set later.
+        out.getDataOutput().writeShort(0);
+        int pos = start;
+        for (int i = 0; i < tokenLength; i++) {
+            char c = Character.toLowerCase(UTF8StringPointable.charAt(data, pos));
+            tokenUTF8Len += StringUtils.writeCharAsModifiedUTF8(c, out.getDataOutput());
+            pos += UTF8StringPointable.charSize(data, pos);
+        }
+        // Set UTF length of token.
+        out.getByteArray()[tokenUTF8LenOff] = (byte) ((tokenUTF8Len >>> 8) & 0xFF);
+        out.getByteArray()[tokenUTF8LenOff + 1] = (byte) ((tokenUTF8Len >>> 0) & 0xFF);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/UTF8WordTokenFactory.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/UTF8WordTokenFactory.java
new file mode 100644
index 0000000..023e957
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/UTF8WordTokenFactory.java
@@ -0,0 +1,39 @@
+/**
+ * Copyright 2010-2011 The Regents of the University of California
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on
+ * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under
+ * the License.
+ * 
+ * Author: Alexander Behm <abehm (at) ics.uci.edu>
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+public class UTF8WordTokenFactory extends AbstractUTF8TokenFactory {
+
+	private static final long serialVersionUID = 1L;
+
+	public UTF8WordTokenFactory() {
+		super();
+	}
+
+	public UTF8WordTokenFactory(byte tokenTypeTag, byte countTypeTag) {
+		super(tokenTypeTag, countTypeTag);
+	}
+
+	@Override
+	public IToken createToken() {
+		return new UTF8WordToken(tokenTypeTag, countTypeTag);
+	}
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/InvertedIndexTokenizingTupleIterator.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/InvertedIndexTokenizingTupleIterator.java
new file mode 100644
index 0000000..b9f9362
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/InvertedIndexTokenizingTupleIterator.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util;
+
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizer;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IToken;
+
+// TODO: We can possibly avoid copying the data into a new tuple here.
+public class InvertedIndexTokenizingTupleIterator {
+    // Field that is expected to be tokenized.
+    protected final int DOC_FIELD_INDEX = 0;
+
+    protected final int invListFieldCount;
+    protected final ArrayTupleBuilder tupleBuilder;
+    protected final ArrayTupleReference tupleReference;
+    protected final IBinaryTokenizer tokenizer;
+    protected ITupleReference inputTuple;
+
+    public InvertedIndexTokenizingTupleIterator(int tokensFieldCount, int invListFieldCount, IBinaryTokenizer tokenizer) {
+        this.invListFieldCount = invListFieldCount;
+        this.tupleBuilder = new ArrayTupleBuilder(tokensFieldCount + invListFieldCount);
+        this.tupleReference = new ArrayTupleReference();
+        this.tokenizer = tokenizer;
+    }
+
+    public void reset(ITupleReference inputTuple) {
+        this.inputTuple = inputTuple;
+        tokenizer.reset(inputTuple.getFieldData(DOC_FIELD_INDEX), inputTuple.getFieldStart(DOC_FIELD_INDEX),
+                inputTuple.getFieldLength(DOC_FIELD_INDEX));
+    }
+
+    public boolean hasNext() {
+        return tokenizer.hasNext();
+    }
+
+    public void next() throws HyracksDataException {
+        tokenizer.next();
+        IToken token = tokenizer.getToken();
+        tupleBuilder.reset();
+        // Add token field.
+        try {
+            token.serializeToken(tupleBuilder.getFieldData());
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+        tupleBuilder.addFieldEndOffset();
+        // Add inverted-list element fields.
+        for (int i = 0; i < invListFieldCount; i++) {
+            tupleBuilder.addField(inputTuple.getFieldData(i + 1), inputTuple.getFieldStart(i + 1),
+                    inputTuple.getFieldLength(i + 1));
+        }
+        // Reset tuple reference for insert operation.
+        tupleReference.reset(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray());
+    }
+
+    public ITupleReference getTuple() {
+        return tupleReference;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/InvertedIndexUtils.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/InvertedIndexUtils.java
new file mode 100644
index 0000000..79c8ccf
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/InvertedIndexUtils.java
@@ -0,0 +1,218 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util;
+
+import java.io.File;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilterFactory;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeException;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMInteriorFrameFactory;
+import edu.uci.ics.hyracks.storage.am.btree.util.BTreeUtils;
+import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.freepage.LinkedListFreePageManagerFactory;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BTreeFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListBuilder;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListBuilderFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls.LSMInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls.LSMInvertedIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls.PartitionedLSMInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory.InMemoryInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory.PartitionedInMemoryInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.FixedSizeElementInvertedListBuilder;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.FixedSizeElementInvertedListBuilderFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.OnDiskInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.OnDiskInvertedIndexFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.PartitionedOnDiskInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.PartitionedOnDiskInvertedIndexFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class InvertedIndexUtils {
+
+    public static InMemoryInvertedIndex createInMemoryBTreeInvertedindex(IBufferCache memBufferCache,
+            IFreePageManager memFreePageManager, ITypeTraits[] invListTypeTraits,
+            IBinaryComparatorFactory[] invListCmpFactories, ITypeTraits[] tokenTypeTraits,
+            IBinaryComparatorFactory[] tokenCmpFactories, IBinaryTokenizerFactory tokenizerFactory)
+            throws BTreeException {
+        return new InMemoryInvertedIndex(memBufferCache, memFreePageManager, invListTypeTraits, invListCmpFactories,
+                tokenTypeTraits, tokenCmpFactories, tokenizerFactory);
+    }
+
+    public static InMemoryInvertedIndex createPartitionedInMemoryBTreeInvertedindex(IBufferCache memBufferCache,
+            IFreePageManager memFreePageManager, ITypeTraits[] invListTypeTraits,
+            IBinaryComparatorFactory[] invListCmpFactories, ITypeTraits[] tokenTypeTraits,
+            IBinaryComparatorFactory[] tokenCmpFactories, IBinaryTokenizerFactory tokenizerFactory)
+            throws BTreeException {
+        return new PartitionedInMemoryInvertedIndex(memBufferCache, memFreePageManager, invListTypeTraits,
+                invListCmpFactories, tokenTypeTraits, tokenCmpFactories, tokenizerFactory);
+    }
+
+    public static OnDiskInvertedIndex createOnDiskInvertedIndex(IBufferCache bufferCache,
+            IFileMapProvider fileMapProvider, ITypeTraits[] invListTypeTraits,
+            IBinaryComparatorFactory[] invListCmpFactories, ITypeTraits[] tokenTypeTraits,
+            IBinaryComparatorFactory[] tokenCmpFactories, FileReference invListsFile) throws IndexException {
+        IInvertedListBuilder builder = new FixedSizeElementInvertedListBuilder(invListTypeTraits);
+        FileReference btreeFile = getBTreeFile(invListsFile);
+        return new OnDiskInvertedIndex(bufferCache, fileMapProvider, builder, invListTypeTraits, invListCmpFactories,
+                tokenTypeTraits, tokenCmpFactories, btreeFile, invListsFile);
+    }
+
+    public static PartitionedOnDiskInvertedIndex createPartitionedOnDiskInvertedIndex(IBufferCache bufferCache,
+            IFileMapProvider fileMapProvider, ITypeTraits[] invListTypeTraits,
+            IBinaryComparatorFactory[] invListCmpFactories, ITypeTraits[] tokenTypeTraits,
+            IBinaryComparatorFactory[] tokenCmpFactories, FileReference invListsFile) throws IndexException {
+        IInvertedListBuilder builder = new FixedSizeElementInvertedListBuilder(invListTypeTraits);
+        FileReference btreeFile = getBTreeFile(invListsFile);
+        return new PartitionedOnDiskInvertedIndex(bufferCache, fileMapProvider, builder, invListTypeTraits,
+                invListCmpFactories, tokenTypeTraits, tokenCmpFactories, btreeFile, invListsFile);
+    }
+
+    public static FileReference getBTreeFile(FileReference invListsFile) {
+        return new FileReference(new File(invListsFile.getFile().getPath() + "_btree"));
+    }
+
+    public static BTreeFactory createDeletedKeysBTreeFactory(IFileMapProvider diskFileMapProvider,
+            ITypeTraits[] invListTypeTraits, IBinaryComparatorFactory[] invListCmpFactories,
+            IBufferCache diskBufferCache) throws BTreeException {
+        TypeAwareTupleWriterFactory tupleWriterFactory = new TypeAwareTupleWriterFactory(invListTypeTraits);
+        ITreeIndexFrameFactory leafFrameFactory = BTreeUtils.getLeafFrameFactory(tupleWriterFactory,
+                BTreeLeafFrameType.REGULAR_NSM);
+        ITreeIndexFrameFactory interiorFrameFactory = new BTreeNSMInteriorFrameFactory(tupleWriterFactory);
+        ITreeIndexMetaDataFrameFactory metaFrameFactory = new LIFOMetaDataFrameFactory();
+        LinkedListFreePageManagerFactory freePageManagerFactory = new LinkedListFreePageManagerFactory(diskBufferCache,
+                metaFrameFactory);
+        BTreeFactory deletedKeysBTreeFactory = new BTreeFactory(diskBufferCache, diskFileMapProvider,
+                freePageManagerFactory, interiorFrameFactory, leafFrameFactory, invListCmpFactories,
+                invListCmpFactories.length);
+        return deletedKeysBTreeFactory;
+    }
+
+    public static LSMInvertedIndex createLSMInvertedIndex(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IFileMapProvider diskFileMapProvider,
+            ITypeTraits[] invListTypeTraits, IBinaryComparatorFactory[] invListCmpFactories,
+            ITypeTraits[] tokenTypeTraits, IBinaryComparatorFactory[] tokenCmpFactories,
+            IBinaryTokenizerFactory tokenizerFactory, IBufferCache diskBufferCache, IIOManager ioManager,
+            String onDiskDir, ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider)
+            throws IndexException {
+        return createLSMInvertedIndex(memBufferCache, memFreePageManager, diskFileMapProvider, invListTypeTraits,
+                invListCmpFactories, tokenTypeTraits, tokenCmpFactories, tokenizerFactory, diskBufferCache, ioManager,
+                onDiskDir, mergePolicy, opTrackerFactory, ioScheduler, ioOpCallbackProvider, 0);
+    }
+
+    public static LSMInvertedIndex createLSMInvertedIndex(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IFileMapProvider diskFileMapProvider,
+            ITypeTraits[] invListTypeTraits, IBinaryComparatorFactory[] invListCmpFactories,
+            ITypeTraits[] tokenTypeTraits, IBinaryComparatorFactory[] tokenCmpFactories,
+            IBinaryTokenizerFactory tokenizerFactory, IBufferCache diskBufferCache, IIOManager ioManager,
+            String onDiskDir, ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            int startIODeviceIndex) throws IndexException {
+
+        BTreeFactory deletedKeysBTreeFactory = createDeletedKeysBTreeFactory(diskFileMapProvider, invListTypeTraits,
+                invListCmpFactories, diskBufferCache);
+
+        int[] bloomFilterKeyFields = new int[invListCmpFactories.length];
+        for (int i = 0; i < invListCmpFactories.length; i++) {
+            bloomFilterKeyFields[i] = i;
+        }
+        BloomFilterFactory bloomFilterFactory = new BloomFilterFactory(diskBufferCache, diskFileMapProvider,
+                bloomFilterKeyFields);
+
+        FileReference onDiskDirFileRef = new FileReference(new File(onDiskDir));
+        LSMInvertedIndexFileManager fileManager = new LSMInvertedIndexFileManager(ioManager, diskFileMapProvider,
+                onDiskDirFileRef, deletedKeysBTreeFactory, startIODeviceIndex);
+
+        IInvertedListBuilderFactory invListBuilderFactory = new FixedSizeElementInvertedListBuilderFactory(
+                invListTypeTraits);
+        OnDiskInvertedIndexFactory invIndexFactory = new OnDiskInvertedIndexFactory(diskBufferCache,
+                diskFileMapProvider, invListBuilderFactory, invListTypeTraits, invListCmpFactories, tokenTypeTraits,
+                tokenCmpFactories, fileManager);
+
+        LSMInvertedIndex invIndex = new LSMInvertedIndex(memBufferCache, memFreePageManager, invIndexFactory,
+                deletedKeysBTreeFactory, bloomFilterFactory, fileManager, diskFileMapProvider, invListTypeTraits,
+                invListCmpFactories, tokenTypeTraits, tokenCmpFactories, tokenizerFactory, mergePolicy,
+                opTrackerFactory, ioScheduler, ioOpCallbackProvider);
+        return invIndex;
+    }
+
+    public static PartitionedLSMInvertedIndex createPartitionedLSMInvertedIndex(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IFileMapProvider diskFileMapProvider,
+            ITypeTraits[] invListTypeTraits, IBinaryComparatorFactory[] invListCmpFactories,
+            ITypeTraits[] tokenTypeTraits, IBinaryComparatorFactory[] tokenCmpFactories,
+            IBinaryTokenizerFactory tokenizerFactory, IBufferCache diskBufferCache, IIOManager ioManager,
+            String onDiskDir, ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider)
+            throws IndexException {
+        return createPartitionedLSMInvertedIndex(memBufferCache, memFreePageManager, diskFileMapProvider,
+                invListTypeTraits, invListCmpFactories, tokenTypeTraits, tokenCmpFactories, tokenizerFactory,
+                diskBufferCache, ioManager, onDiskDir, mergePolicy, opTrackerFactory, ioScheduler,
+                ioOpCallbackProvider, 0);
+    }
+
+    public static PartitionedLSMInvertedIndex createPartitionedLSMInvertedIndex(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IFileMapProvider diskFileMapProvider,
+            ITypeTraits[] invListTypeTraits, IBinaryComparatorFactory[] invListCmpFactories,
+            ITypeTraits[] tokenTypeTraits, IBinaryComparatorFactory[] tokenCmpFactories,
+            IBinaryTokenizerFactory tokenizerFactory, IBufferCache diskBufferCache, IIOManager ioManager,
+            String onDiskDir, ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            int startIODeviceIndex) throws IndexException {
+
+        BTreeFactory deletedKeysBTreeFactory = createDeletedKeysBTreeFactory(diskFileMapProvider, invListTypeTraits,
+                invListCmpFactories, diskBufferCache);
+
+        int[] bloomFilterKeyFields = new int[invListCmpFactories.length];
+        for (int i = 0; i < invListCmpFactories.length; i++) {
+            bloomFilterKeyFields[i] = i;
+        }
+        BloomFilterFactory bloomFilterFactory = new BloomFilterFactory(diskBufferCache, diskFileMapProvider,
+                bloomFilterKeyFields);
+
+        FileReference onDiskDirFileRef = new FileReference(new File(onDiskDir));
+        LSMInvertedIndexFileManager fileManager = new LSMInvertedIndexFileManager(ioManager, diskFileMapProvider,
+                onDiskDirFileRef, deletedKeysBTreeFactory, startIODeviceIndex);
+
+        IInvertedListBuilderFactory invListBuilderFactory = new FixedSizeElementInvertedListBuilderFactory(
+                invListTypeTraits);
+        PartitionedOnDiskInvertedIndexFactory invIndexFactory = new PartitionedOnDiskInvertedIndexFactory(
+                diskBufferCache, diskFileMapProvider, invListBuilderFactory, invListTypeTraits, invListCmpFactories,
+                tokenTypeTraits, tokenCmpFactories, fileManager);
+
+        PartitionedLSMInvertedIndex invIndex = new PartitionedLSMInvertedIndex(memBufferCache, memFreePageManager,
+                invIndexFactory, deletedKeysBTreeFactory, bloomFilterFactory, fileManager, diskFileMapProvider,
+                invListTypeTraits, invListCmpFactories, tokenTypeTraits, tokenCmpFactories, tokenizerFactory,
+                mergePolicy, opTrackerFactory, ioScheduler, ioOpCallbackProvider);
+        return invIndex;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/ObjectCache.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/ObjectCache.java
new file mode 100644
index 0000000..b073f20
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/ObjectCache.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util;
+
+import java.util.ArrayList;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IObjectFactory;
+
+public class ObjectCache<T> {
+    protected final int expandSize;
+    protected final IObjectFactory<T> objFactory;
+    protected final ArrayList<T> cache;
+    protected int lastReturned = 0;
+
+    public ObjectCache(IObjectFactory<T> objFactory, int initialSize, int expandSize) {
+        this.objFactory = objFactory;
+        this.cache = new ArrayList<T>(initialSize);
+        this.expandSize = expandSize;
+        expand(initialSize);
+    }
+
+    private void expand(int expandSize) {
+        for (int i = 0; i < expandSize; i++) {
+            cache.add(objFactory.create());
+        }
+    }
+
+    public void reset() {
+        lastReturned = 0;
+    }
+
+    public T getNext() {
+        if (lastReturned >= cache.size()) {
+            expand(expandSize);
+        }
+        return cache.get(lastReturned++);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/PartitionedInvertedIndexTokenizingTupleIterator.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/PartitionedInvertedIndexTokenizingTupleIterator.java
new file mode 100644
index 0000000..8a18a91
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/PartitionedInvertedIndexTokenizingTupleIterator.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util;
+
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizer;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IToken;
+
+// TODO: We can possibly avoid copying the data into a new tuple here.
+public class PartitionedInvertedIndexTokenizingTupleIterator extends InvertedIndexTokenizingTupleIterator {
+
+    protected short numTokens = 0;
+
+    public PartitionedInvertedIndexTokenizingTupleIterator(int tokensFieldCount, int invListFieldCount,
+            IBinaryTokenizer tokenizer) {
+        super(tokensFieldCount, invListFieldCount, tokenizer);
+    }
+
+    public void reset(ITupleReference inputTuple) {
+        super.reset(inputTuple);
+        // Run through the tokenizer once to get the total number of tokens.
+        numTokens = 0;
+        while (tokenizer.hasNext()) {
+            tokenizer.next();
+            numTokens++;
+        }
+        super.reset(inputTuple);
+    }
+
+    public void next() throws HyracksDataException {
+        tokenizer.next();
+        IToken token = tokenizer.getToken();
+        tupleBuilder.reset();
+        try {
+            // Add token field.
+            token.serializeToken(tupleBuilder.getFieldData());
+            tupleBuilder.addFieldEndOffset();
+            // Add field with number of tokens.
+            tupleBuilder.getDataOutput().writeShort(numTokens);
+            tupleBuilder.addFieldEndOffset();
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+        // Add inverted-list element fields.
+        for (int i = 0; i < invListFieldCount; i++) {
+            tupleBuilder.addField(inputTuple.getFieldData(i + 1), inputTuple.getFieldStart(i + 1),
+                    inputTuple.getFieldLength(i + 1));
+        }
+        // Reset tuple reference for insert operation.
+        tupleReference.reset(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray());
+    }
+
+    public short getNumTokens() {
+        return numTokens;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/pom.xml b/hyracks/hyracks-storage-am-lsm-rtree/pom.xml
new file mode 100644
index 0000000..a345ee5
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/pom.xml
@@ -0,0 +1,47 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <artifactId>hyracks-storage-am-lsm-rtree</artifactId>
+
+  <parent>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks</artifactId>
+    <version>0.2.5-SNAPSHOT</version>
+  </parent>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.0.2</version>
+        <configuration>
+          <source>1.7</source>
+          <target>1.7</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-lsm-common</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-btree</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-rtree</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>  		
+  </dependencies>
+</project>
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/AbstractLSMRTreeDataflowHelper.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/AbstractLSMRTreeDataflowHelper.java
new file mode 100644
index 0000000..c363c99
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/AbstractLSMRTreeDataflowHelper.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.dataflow.AbstractLSMIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.DualIndexInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.DualIndexInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.storage.common.buffercache.HeapBufferAllocator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public abstract class AbstractLSMRTreeDataflowHelper extends AbstractLSMIndexDataflowHelper {
+
+    protected final IBinaryComparatorFactory[] btreeComparatorFactories;
+    protected final IPrimitiveValueProviderFactory[] valueProviderFactories;
+    protected final RTreePolicyType rtreePolicyType;
+    protected final ILinearizeComparatorFactory linearizeCmpFactory;
+
+    public AbstractLSMRTreeDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition,
+            IBinaryComparatorFactory[] btreeComparatorFactories,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            ILinearizeComparatorFactory linearizeCmpFactory) {
+        this(opDesc, ctx, partition, DEFAULT_MEM_PAGE_SIZE, DEFAULT_MEM_NUM_PAGES, btreeComparatorFactories,
+                valueProviderFactories, rtreePolicyType, mergePolicy, opTrackerFactory, ioScheduler,
+                ioOpCallbackProvider, linearizeCmpFactory);
+    }
+
+    public AbstractLSMRTreeDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition,
+            int memPageSize, int memNumPages, IBinaryComparatorFactory[] btreeComparatorFactories,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            ILinearizeComparatorFactory linearizeCmpFactory) {
+        super(opDesc, ctx, partition, memPageSize, memNumPages, mergePolicy, opTrackerFactory, ioScheduler,
+                ioOpCallbackProvider);
+        this.btreeComparatorFactories = btreeComparatorFactories;
+        this.valueProviderFactories = valueProviderFactories;
+        this.rtreePolicyType = rtreePolicyType;
+        this.linearizeCmpFactory = linearizeCmpFactory;
+    }
+
+    @Override
+    public ITreeIndex createIndexInstance() throws HyracksDataException {
+        AbstractTreeIndexOperatorDescriptor treeOpDesc = (AbstractTreeIndexOperatorDescriptor) opDesc;
+        ITreeIndexMetaDataFrameFactory metaDataFrameFactory = new LIFOMetaDataFrameFactory();
+        IInMemoryBufferCache memBufferCache = new DualIndexInMemoryBufferCache(new HeapBufferAllocator(), memPageSize,
+                memNumPages);
+        IInMemoryFreePageManager memFreePageManager = new DualIndexInMemoryFreePageManager(memNumPages,
+                metaDataFrameFactory);
+        return createLSMTree(memBufferCache, memFreePageManager, ctx.getIOManager(), file, opDesc.getStorageManager()
+                .getBufferCache(ctx), opDesc.getStorageManager().getFileMapProvider(ctx),
+                treeOpDesc.getTreeIndexTypeTraits(), treeOpDesc.getTreeIndexComparatorFactories(),
+                btreeComparatorFactories, valueProviderFactories, rtreePolicyType, linearizeCmpFactory, partition);
+
+    }
+
+    protected abstract ITreeIndex createLSMTree(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IIOManager ioManager, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            ILinearizeComparatorFactory linearizeCmpFactory, int startIODeviceIndex) throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/LSMRTreeDataflowHelper.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/LSMRTreeDataflowHelper.java
new file mode 100644
index 0000000..1df914e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/LSMRTreeDataflowHelper.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.utils.LSMRTreeUtils;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class LSMRTreeDataflowHelper extends AbstractLSMRTreeDataflowHelper {
+
+    public LSMRTreeDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition,
+            IBinaryComparatorFactory[] btreeComparatorFactories,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            ILinearizeComparatorFactory linearizeCmpFactory) {
+        super(opDesc, ctx, partition, btreeComparatorFactories, valueProviderFactories, rtreePolicyType, mergePolicy,
+                opTrackerFactory, ioScheduler, ioOpCallbackProvider, linearizeCmpFactory);
+    }
+
+    public LSMRTreeDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition,
+            int memPageSize, int memNumPages, IBinaryComparatorFactory[] btreeComparatorFactories,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            ILinearizeComparatorFactory linearizeCmpFactory) {
+        super(opDesc, ctx, partition, memPageSize, memNumPages, btreeComparatorFactories, valueProviderFactories,
+                rtreePolicyType, mergePolicy, opTrackerFactory, ioScheduler, ioOpCallbackProvider, linearizeCmpFactory);
+    }
+
+    @Override
+    protected ITreeIndex createLSMTree(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IIOManager ioManager, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            ILinearizeComparatorFactory linearizeCmpFactory, int startIODeviceIndex) throws HyracksDataException {
+        try {
+            return LSMRTreeUtils.createLSMTree(memBufferCache, memFreePageManager, ioManager, file, diskBufferCache,
+                    diskFileMapProvider, typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories,
+                    rtreePolicyType, mergePolicy, opTrackerFactory, ioScheduler, ioOpCallbackProvider,
+                    linearizeCmpFactory, startIODeviceIndex);
+        } catch (TreeIndexException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/LSMRTreeDataflowHelperFactory.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/LSMRTreeDataflowHelperFactory.java
new file mode 100644
index 0000000..a730895
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/LSMRTreeDataflowHelperFactory.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationSchedulerProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicyProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.dataflow.AbstractLSMIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+public class LSMRTreeDataflowHelperFactory extends AbstractLSMIndexDataflowHelperFactory {
+
+    private static final long serialVersionUID = 1L;
+
+    private final IBinaryComparatorFactory[] btreeComparatorFactories;
+    private final IPrimitiveValueProviderFactory[] valueProviderFactories;
+    private final RTreePolicyType rtreePolicyType;
+    private final ILinearizeComparatorFactory linearizeCmpFactory;
+
+    public LSMRTreeDataflowHelperFactory(IPrimitiveValueProviderFactory[] valueProviderFactories,
+            RTreePolicyType rtreePolicyType, IBinaryComparatorFactory[] btreeComparatorFactories,
+            ILSMMergePolicyProvider mergePolicyProvider, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationSchedulerProvider ioSchedulerProvider, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            ILinearizeComparatorFactory linearizeCmpFactory, int memPageSize, int memNumPages) {
+        super(mergePolicyProvider, opTrackerFactory, ioSchedulerProvider, ioOpCallbackProvider, memPageSize,
+                memNumPages);
+        this.btreeComparatorFactories = btreeComparatorFactories;
+        this.valueProviderFactories = valueProviderFactories;
+        this.rtreePolicyType = rtreePolicyType;
+        this.linearizeCmpFactory = linearizeCmpFactory;
+    }
+
+    @Override
+    public IndexDataflowHelper createIndexDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
+            int partition) {
+        return new LSMRTreeDataflowHelper(opDesc, ctx, partition, memPageSize, memNumPages, btreeComparatorFactories, valueProviderFactories,
+                rtreePolicyType, mergePolicyProvider.getMergePolicy(ctx), opTrackerFactory,
+                ioSchedulerProvider.getIOScheduler(ctx), ioOpCallbackProvider, linearizeCmpFactory);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/LSMRTreeWithAntiMatterTuplesDataflowHelper.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/LSMRTreeWithAntiMatterTuplesDataflowHelper.java
new file mode 100644
index 0000000..6f5ecb1
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/LSMRTreeWithAntiMatterTuplesDataflowHelper.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.utils.LSMRTreeUtils;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class LSMRTreeWithAntiMatterTuplesDataflowHelper extends AbstractLSMRTreeDataflowHelper {
+    public LSMRTreeWithAntiMatterTuplesDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
+            int partition, IBinaryComparatorFactory[] btreeComparatorFactories,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            ILinearizeComparatorFactory linearizeCmpFactory) {
+        super(opDesc, ctx, partition, btreeComparatorFactories, valueProviderFactories, rtreePolicyType, mergePolicy,
+                opTrackerFactory, ioScheduler, ioOpCallbackProvider, linearizeCmpFactory);
+    }
+
+    public LSMRTreeWithAntiMatterTuplesDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
+            int partition, int memPageSize, int memNumPages, IBinaryComparatorFactory[] btreeComparatorFactories,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            ILinearizeComparatorFactory linearizeCmpFactory) {
+        super(opDesc, ctx, partition, memPageSize, memNumPages, btreeComparatorFactories, valueProviderFactories,
+                rtreePolicyType, mergePolicy, opTrackerFactory, ioScheduler, ioOpCallbackProvider, linearizeCmpFactory);
+    }
+
+    @Override
+    protected ITreeIndex createLSMTree(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IIOManager ioManager, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            ILinearizeComparatorFactory linearizeCmpFactory, int startIODeviceIndex) throws HyracksDataException {
+        try {
+            return LSMRTreeUtils.createLSMTreeWithAntiMatterTuples(memBufferCache, memFreePageManager, ioManager, file,
+                    diskBufferCache, diskFileMapProvider, typeTraits, rtreeCmpFactories, btreeCmpFactories,
+                    valueProviderFactories, rtreePolicyType, mergePolicy, opTrackerFactory, ioScheduler,
+                    ioOpCallbackProvider, linearizeCmpFactory, startIODeviceIndex);
+        } catch (TreeIndexException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/LSMRTreeWithAntiMatterTuplesDataflowHelperFactory.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/LSMRTreeWithAntiMatterTuplesDataflowHelperFactory.java
new file mode 100644
index 0000000..b27e84f
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/LSMRTreeWithAntiMatterTuplesDataflowHelperFactory.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.dataflow;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationSchedulerProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicyProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+public class LSMRTreeWithAntiMatterTuplesDataflowHelperFactory implements IIndexDataflowHelperFactory {
+
+    private static final long serialVersionUID = 1L;
+
+    private final IBinaryComparatorFactory[] btreeComparatorFactories;
+    private final IPrimitiveValueProviderFactory[] valueProviderFactories;
+    private final RTreePolicyType rtreePolicyType;
+    private final ILSMMergePolicyProvider mergePolicyProvider;
+    private final ILSMOperationTrackerFactory opTrackerProvider;
+    private final ILSMIOOperationSchedulerProvider ioSchedulerProvider;
+    private final ILSMIOOperationCallbackProvider ioOpCallbackProvider;
+    private final ILinearizeComparatorFactory linearizeCmpFactory;
+
+    public LSMRTreeWithAntiMatterTuplesDataflowHelperFactory(IPrimitiveValueProviderFactory[] valueProviderFactories,
+            RTreePolicyType rtreePolicyType, IBinaryComparatorFactory[] btreeComparatorFactories,
+            ILSMMergePolicyProvider mergePolicyProvider, ILSMOperationTrackerFactory opTrackerProvider,
+            ILSMIOOperationSchedulerProvider ioSchedulerProvider, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            ILinearizeComparatorFactory linearizeCmpFactory) {
+        this.btreeComparatorFactories = btreeComparatorFactories;
+        this.valueProviderFactories = valueProviderFactories;
+        this.rtreePolicyType = rtreePolicyType;
+        this.mergePolicyProvider = mergePolicyProvider;
+        this.ioSchedulerProvider = ioSchedulerProvider;
+        this.opTrackerProvider = opTrackerProvider;
+        this.ioOpCallbackProvider = ioOpCallbackProvider;
+        this.linearizeCmpFactory = linearizeCmpFactory;
+    }
+
+    @Override
+    public IndexDataflowHelper createIndexDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
+            int partition) {
+        return new LSMRTreeWithAntiMatterTuplesDataflowHelper(opDesc, ctx, partition, btreeComparatorFactories,
+                valueProviderFactories, rtreePolicyType, mergePolicyProvider.getMergePolicy(ctx), opTrackerProvider,
+                ioSchedulerProvider.getIOScheduler(ctx), ioOpCallbackProvider, linearizeCmpFactory);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/AbstractLSMRTree.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/AbstractLSMRTree.java
new file mode 100644
index 0000000..9b377a9
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/AbstractLSMRTree.java
@@ -0,0 +1,358 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import java.io.File;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeDuplicateKeyException;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeNonExistentKeyException;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponentFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.InMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractLSMIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BlockingIOOperationCallbackWrapper;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeInteriorFrame;
+import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public abstract class AbstractLSMRTree extends AbstractLSMIndex implements ITreeIndex {
+
+    protected final ILinearizeComparatorFactory linearizer;
+    protected final int[] comparatorFields;
+    protected final IBinaryComparatorFactory[] linearizerArray;
+
+    // In-memory components.
+    protected final LSMRTreeMutableComponent mutableComponent;
+    protected final IInMemoryBufferCache memBufferCache;
+
+    protected TreeTupleSorter rTreeTupleSorter;
+
+    // On-disk components.
+    // For creating RTree's used in flush and merge.
+    protected final ILSMComponentFactory componentFactory;
+
+    private IBinaryComparatorFactory[] btreeCmpFactories;
+    private IBinaryComparatorFactory[] rtreeCmpFactories;
+
+    // Common for in-memory and on-disk components.
+    protected final ITreeIndexFrameFactory rtreeInteriorFrameFactory;
+    protected final ITreeIndexFrameFactory btreeInteriorFrameFactory;
+    protected final ITreeIndexFrameFactory rtreeLeafFrameFactory;
+    protected final ITreeIndexFrameFactory btreeLeafFrameFactory;
+
+    public AbstractLSMRTree(IInMemoryBufferCache memBufferCache, IInMemoryFreePageManager memFreePageManager,
+            ITreeIndexFrameFactory rtreeInteriorFrameFactory, ITreeIndexFrameFactory rtreeLeafFrameFactory,
+            ITreeIndexFrameFactory btreeInteriorFrameFactory, ITreeIndexFrameFactory btreeLeafFrameFactory,
+            ILSMIndexFileManager fileManager, TreeIndexFactory<RTree> diskRTreeFactory,
+            ILSMComponentFactory componentFactory, IFileMapProvider diskFileMapProvider, int fieldCount,
+            IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
+            ILinearizeComparatorFactory linearizer, int[] comparatorFields, IBinaryComparatorFactory[] linearizerArray,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
+        super(memFreePageManager, diskRTreeFactory.getBufferCache(), fileManager, diskFileMapProvider, mergePolicy,
+                opTrackerFactory, ioScheduler, ioOpCallbackProvider);
+        RTree memRTree = new RTree(memBufferCache, ((InMemoryBufferCache) memBufferCache).getFileMapProvider(),
+                memFreePageManager, rtreeInteriorFrameFactory, rtreeLeafFrameFactory, rtreeCmpFactories, fieldCount,
+                new FileReference(new File("memrtree")));
+        BTree memBTree = new BTree(memBufferCache, ((InMemoryBufferCache) memBufferCache).getFileMapProvider(),
+                memFreePageManager, btreeInteriorFrameFactory, btreeLeafFrameFactory, btreeCmpFactories, fieldCount,
+                new FileReference(new File("membtree")));
+        mutableComponent = new LSMRTreeMutableComponent(memRTree, memBTree, memFreePageManager);
+        this.memBufferCache = memBufferCache;
+        this.rtreeInteriorFrameFactory = rtreeInteriorFrameFactory;
+        this.rtreeLeafFrameFactory = rtreeLeafFrameFactory;
+        this.btreeInteriorFrameFactory = btreeInteriorFrameFactory;
+        this.btreeLeafFrameFactory = btreeLeafFrameFactory;
+        this.componentFactory = componentFactory;
+        this.btreeCmpFactories = btreeCmpFactories;
+        this.rtreeCmpFactories = rtreeCmpFactories;
+        this.linearizer = linearizer;
+        this.comparatorFields = comparatorFields;
+        this.linearizerArray = linearizerArray;
+        rTreeTupleSorter = null;
+    }
+
+    @Override
+    public synchronized void create() throws HyracksDataException {
+        if (isActivated) {
+            throw new HyracksDataException("Failed to create the index since it is activated.");
+        }
+
+        fileManager.deleteDirs();
+        fileManager.createDirs();
+        componentsRef.get().clear();
+    }
+
+    @Override
+    public synchronized void activate() throws HyracksDataException {
+        if (isActivated) {
+            return;
+        }
+
+        ((InMemoryBufferCache) mutableComponent.getRTree().getBufferCache()).open();
+        mutableComponent.getRTree().create();
+        mutableComponent.getBTree().create();
+        mutableComponent.getRTree().activate();
+        mutableComponent.getBTree().activate();
+    }
+
+    @Override
+    public synchronized void deactivate(boolean flushOnExit) throws HyracksDataException {
+        if (!isActivated) {
+            return;
+        }
+
+        if (flushOnExit) {
+            BlockingIOOperationCallbackWrapper cb = new BlockingIOOperationCallbackWrapper(
+                    ioOpCallbackProvider.getIOOperationCallback(this));
+            ILSMIndexAccessor accessor = (ILSMIndexAccessor) createAccessor(NoOpOperationCallback.INSTANCE,
+                    NoOpOperationCallback.INSTANCE);
+            accessor.scheduleFlush(cb);
+            try {
+                cb.waitForIO();
+            } catch (InterruptedException e) {
+                throw new HyracksDataException(e);
+            }
+        }
+
+        mutableComponent.getRTree().deactivate();
+        mutableComponent.getBTree().deactivate();
+        mutableComponent.getRTree().destroy();
+        mutableComponent.getBTree().destroy();
+        ((InMemoryBufferCache) mutableComponent.getRTree().getBufferCache()).close();
+    }
+
+    @Override
+    public synchronized void destroy() throws HyracksDataException {
+        if (isActivated) {
+            throw new HyracksDataException("Failed to destroy the index since it is activated.");
+        }
+
+        mutableComponent.getRTree().deactivate();
+        mutableComponent.getBTree().deactivate();
+    }
+
+    @Override
+    public synchronized void clear() throws HyracksDataException {
+        if (!isActivated) {
+            throw new HyracksDataException("Failed to clear the index since it is not activated.");
+        }
+
+        mutableComponent.getRTree().clear();
+        mutableComponent.getBTree().clear();
+    }
+
+    @Override
+    public void getOperationalComponents(ILSMIndexOperationContext ctx) {
+        List<ILSMComponent> operationalComponents = ctx.getComponentHolder();
+        operationalComponents.clear();
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        switch (ctx.getOperation()) {
+            case INSERT:
+            case DELETE:
+            case FLUSH:
+                operationalComponents.add(mutableComponent);
+                break;
+            case SEARCH:
+                operationalComponents.add(mutableComponent);
+                operationalComponents.addAll(immutableComponents);
+                break;
+            case MERGE:
+                operationalComponents.addAll(immutableComponents);
+                break;
+            default:
+                throw new UnsupportedOperationException("Operation " + ctx.getOperation() + " not supported.");
+        }
+    }
+
+    protected LSMComponentFileReferences getMergeTargetFileName(List<ILSMComponent> mergingDiskComponents)
+            throws HyracksDataException {
+        RTree firstTree = ((LSMRTreeImmutableComponent) mergingDiskComponents.get(0)).getRTree();
+        RTree lastTree = ((LSMRTreeImmutableComponent) mergingDiskComponents.get(mergingDiskComponents.size() - 1))
+                .getRTree();
+        FileReference firstFile = diskFileMapProvider.lookupFileName(firstTree.getFileId());
+        FileReference lastFile = diskFileMapProvider.lookupFileName(lastTree.getFileId());
+        LSMComponentFileReferences fileRefs = fileManager.getRelMergeFileReference(firstFile.getFile().getName(),
+                lastFile.getFile().getName());
+        return fileRefs;
+    }
+
+    protected LSMRTreeImmutableComponent createDiskComponent(ILSMComponentFactory factory, FileReference insertFileRef,
+            FileReference deleteFileRef, FileReference bloomFilterFileRef, boolean createComponent)
+            throws HyracksDataException, IndexException {
+        // Create new tree instance.
+        LSMRTreeImmutableComponent component = (LSMRTreeImmutableComponent) factory
+                .createLSMComponentInstance(new LSMComponentFileReferences(insertFileRef, deleteFileRef,
+                        bloomFilterFileRef));
+        if (createComponent) {
+            component.getRTree().create();
+            if (component.getBTree() != null) {
+                component.getBTree().create();
+                component.getBloomFilter().create();
+            }
+        }
+        // Tree will be closed during cleanup of merge().
+        component.getRTree().activate();
+        if (component.getBTree() != null) {
+            component.getBTree().activate();
+            component.getBloomFilter().activate();
+        }
+        return component;
+    }
+
+    @Override
+    public ITreeIndexFrameFactory getLeafFrameFactory() {
+        return mutableComponent.getRTree().getLeafFrameFactory();
+    }
+
+    @Override
+    public ITreeIndexFrameFactory getInteriorFrameFactory() {
+        return mutableComponent.getRTree().getInteriorFrameFactory();
+    }
+
+    @Override
+    public IFreePageManager getFreePageManager() {
+        return mutableComponent.getRTree().getFreePageManager();
+    }
+
+    @Override
+    public int getFieldCount() {
+        return mutableComponent.getRTree().getFieldCount();
+    }
+
+    @Override
+    public int getRootPageId() {
+        return mutableComponent.getRTree().getRootPageId();
+    }
+
+    @Override
+    public int getFileId() {
+        return mutableComponent.getRTree().getFileId();
+    }
+
+    @Override
+    public void modify(IIndexOperationContext ictx, ITupleReference tuple) throws HyracksDataException, IndexException {
+        LSMRTreeOpContext ctx = (LSMRTreeOpContext) ictx;
+        if (ctx.getOperation() == IndexOperation.PHYSICALDELETE) {
+            throw new UnsupportedOperationException("Physical delete not supported in the LSM-RTree");
+        }
+
+        if (ctx.getOperation() == IndexOperation.INSERT) {
+            // Before each insert, we must check whether there exist a killer
+            // tuple in the memBTree. If we find a killer tuple, we must truly
+            // delete the existing tuple from the BTree, and then insert it to
+            // memRTree. Otherwise, the old killer tuple will kill the newly
+            // added RTree tuple.
+            RangePredicate btreeRangePredicate = new RangePredicate(tuple, tuple, true, true,
+                    ctx.getBTreeMultiComparator(), ctx.getBTreeMultiComparator());
+            ITreeIndexCursor cursor = ctx.memBTreeAccessor.createSearchCursor();
+            ctx.memBTreeAccessor.search(cursor, btreeRangePredicate);
+            boolean foundTupleInMemoryBTree = false;
+            try {
+                if (cursor.hasNext()) {
+                    foundTupleInMemoryBTree = true;
+                }
+            } finally {
+                cursor.close();
+            }
+            if (foundTupleInMemoryBTree) {
+                try {
+                    ctx.memBTreeAccessor.delete(tuple);
+                } catch (BTreeNonExistentKeyException e) {
+                    // Tuple has been deleted in the meantime. Do nothing.
+                    // This normally shouldn't happen if we are dealing with
+                    // good citizens since LSMRTree is used as a secondary
+                    // index and a tuple shouldn't be deleted twice without
+                    // insert between them.
+                }
+            } else {
+                ctx.memRTreeAccessor.insert(tuple);
+            }
+
+        } else {
+            try {
+                ctx.memBTreeAccessor.insert(tuple);
+            } catch (BTreeDuplicateKeyException e) {
+                // Do nothing, because one delete tuple is enough to indicate
+                // that all the corresponding insert tuples are deleted
+            }
+        }
+        mutableComponent.setIsModified();
+    }
+
+    protected LSMRTreeOpContext createOpContext(IModificationOperationCallback modCallback) {
+        return new LSMRTreeOpContext((RTree.RTreeAccessor) mutableComponent.getRTree().createAccessor(modCallback,
+                NoOpOperationCallback.INSTANCE), (IRTreeLeafFrame) rtreeLeafFrameFactory.createFrame(),
+                (IRTreeInteriorFrame) rtreeInteriorFrameFactory.createFrame(), memFreePageManager
+                        .getMetaDataFrameFactory().createFrame(), 4, (BTree.BTreeAccessor) mutableComponent.getBTree()
+                        .createAccessor(modCallback, NoOpOperationCallback.INSTANCE), btreeLeafFrameFactory,
+                btreeInteriorFrameFactory, memFreePageManager.getMetaDataFrameFactory().createFrame(),
+                rtreeCmpFactories, btreeCmpFactories, null, null);
+    }
+
+    @Override
+    public IBinaryComparatorFactory[] getComparatorFactories() {
+        return rtreeCmpFactories;
+    }
+
+    public boolean isEmptyIndex() throws HyracksDataException {
+        return componentsRef.get().isEmpty()
+                && mutableComponent.getBTree().isEmptyTree(
+                        mutableComponent.getBTree().getInteriorFrameFactory().createFrame())
+                && mutableComponent.getRTree().isEmptyTree(
+                        mutableComponent.getRTree().getInteriorFrameFactory().createFrame());
+    }
+
+    @Override
+    public void validate() throws HyracksDataException {
+        throw new UnsupportedOperationException("Validation not implemented for LSM R-Trees.");
+    }
+
+    @Override
+    public long getMemoryAllocationSize() {
+        InMemoryBufferCache memBufferCache = (InMemoryBufferCache) mutableComponent.getRTree().getBufferCache();
+        return memBufferCache.getNumPages() * memBufferCache.getPageSize();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTree.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTree.java
new file mode 100644
index 0000000..fc5b06d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTree.java
@@ -0,0 +1,478 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import java.util.List;
+import java.util.ListIterator;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomCalculations;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilter;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilterFactory;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilterSpecification;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree.BTreeAccessor;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessorInternal;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMTreeIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTreeSearchCursor;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.SearchPredicate;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class LSMRTree extends AbstractLSMRTree {
+
+    public LSMRTree(IInMemoryBufferCache memBufferCache, IInMemoryFreePageManager memFreePageManager,
+            ITreeIndexFrameFactory rtreeInteriorFrameFactory, ITreeIndexFrameFactory rtreeLeafFrameFactory,
+            ITreeIndexFrameFactory btreeInteriorFrameFactory, ITreeIndexFrameFactory btreeLeafFrameFactory,
+            ILSMIndexFileManager fileNameManager, TreeIndexFactory<RTree> diskRTreeFactory,
+            TreeIndexFactory<BTree> diskBTreeFactory, BloomFilterFactory bloomFilterFactory,
+            IFileMapProvider diskFileMapProvider, int fieldCount, IBinaryComparatorFactory[] rtreeCmpFactories,
+            IBinaryComparatorFactory[] btreeCmpFactories, ILinearizeComparatorFactory linearizer,
+            int[] comparatorFields, IBinaryComparatorFactory[] linearizerArray, ILSMMergePolicy mergePolicy,
+            ILSMOperationTrackerFactory opTrackerFactory, ILSMIOOperationScheduler ioScheduler,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
+        super(memBufferCache, memFreePageManager, rtreeInteriorFrameFactory, rtreeLeafFrameFactory,
+                btreeInteriorFrameFactory, btreeLeafFrameFactory, fileNameManager, diskRTreeFactory,
+                new LSMRTreeComponentFactory(diskRTreeFactory, diskBTreeFactory, bloomFilterFactory),
+                diskFileMapProvider, fieldCount, rtreeCmpFactories, btreeCmpFactories, linearizer, comparatorFields,
+                linearizerArray, mergePolicy, opTrackerFactory, ioScheduler, ioOpCallbackProvider);
+    }
+
+    /**
+     * Opens LSMRTree, cleaning up invalid files from base dir, and registering
+     * all valid files as on-disk RTrees and BTrees.
+     * 
+     * @param fileReference
+     *            Dummy file id.
+     * @throws HyracksDataException
+     */
+    @Override
+    public synchronized void activate() throws HyracksDataException {
+        super.activate();
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        List<LSMComponentFileReferences> validFileReferences;
+        try {
+            validFileReferences = fileManager.cleanupAndGetValidFiles();
+        } catch (IndexException e) {
+            throw new HyracksDataException(e);
+        }
+        immutableComponents.clear();
+        for (LSMComponentFileReferences lsmComonentFileReference : validFileReferences) {
+            LSMRTreeImmutableComponent component;
+            try {
+                component = createDiskComponent(componentFactory,
+                        lsmComonentFileReference.getInsertIndexFileReference(),
+                        lsmComonentFileReference.getDeleteIndexFileReference(),
+                        lsmComonentFileReference.getBloomFilterFileReference(), false);
+            } catch (IndexException e) {
+                throw new HyracksDataException(e);
+            }
+            immutableComponents.add(component);
+        }
+        isActivated = true;
+    }
+
+    @Override
+    public synchronized void deactivate(boolean flushOnExit) throws HyracksDataException {
+        super.deactivate(flushOnExit);
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        for (ILSMComponent c : immutableComponents) {
+            LSMRTreeImmutableComponent component = (LSMRTreeImmutableComponent) c;
+            RTree rtree = component.getRTree();
+            BTree btree = component.getBTree();
+            BloomFilter bloomFilter = component.getBloomFilter();
+            rtree.deactivate();
+            btree.deactivate();
+            bloomFilter.deactivate();
+        }
+        isActivated = false;
+    }
+
+    @Override
+    public synchronized void deactivate() throws HyracksDataException {
+        deactivate(true);
+    }
+
+    @Override
+    public synchronized void destroy() throws HyracksDataException {
+        super.destroy();
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        for (ILSMComponent c : immutableComponents) {
+            LSMRTreeImmutableComponent component = (LSMRTreeImmutableComponent) c;
+            component.getBTree().destroy();
+            component.getBloomFilter().destroy();
+            component.getRTree().destroy();
+        }
+        fileManager.deleteDirs();
+    }
+
+    @Override
+    public synchronized void clear() throws HyracksDataException {
+        super.clear();
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        for (ILSMComponent c : immutableComponents) {
+            LSMRTreeImmutableComponent component = (LSMRTreeImmutableComponent) c;
+            component.getBTree().deactivate();
+            component.getBloomFilter().deactivate();
+            component.getRTree().deactivate();
+            component.getBTree().destroy();
+            component.getBloomFilter().destroy();
+            component.getRTree().destroy();
+        }
+        immutableComponents.clear();
+    }
+
+    @Override
+    public void search(ILSMIndexOperationContext ictx, IIndexCursor cursor, ISearchPredicate pred)
+            throws HyracksDataException, IndexException {
+        LSMRTreeOpContext ctx = (LSMRTreeOpContext) ictx;
+        List<ILSMComponent> operationalComponents = ctx.getComponentHolder();
+        boolean includeMutableComponent = operationalComponents.get(0) == mutableComponent;
+        int numTrees = operationalComponents.size();
+
+        ListIterator<ILSMComponent> diskComponentIter = operationalComponents.listIterator();
+        ITreeIndexAccessor[] rTreeAccessors = new ITreeIndexAccessor[numTrees];
+        ITreeIndexAccessor[] bTreeAccessors = new ITreeIndexAccessor[numTrees];
+        int diskComponentIx = 0;
+        if (includeMutableComponent) {
+            rTreeAccessors[0] = ctx.memRTreeAccessor;
+            bTreeAccessors[0] = ctx.memBTreeAccessor;
+            diskComponentIx++;
+            diskComponentIter.next();
+        }
+
+        while (diskComponentIter.hasNext()) {
+            LSMRTreeImmutableComponent component = (LSMRTreeImmutableComponent) diskComponentIter.next();
+            RTree diskRTree = component.getRTree();
+            BTree diskBTree = component.getBTree();
+            rTreeAccessors[diskComponentIx] = diskRTree.createAccessor(NoOpOperationCallback.INSTANCE,
+                    NoOpOperationCallback.INSTANCE);
+            bTreeAccessors[diskComponentIx] = diskBTree.createAccessor(NoOpOperationCallback.INSTANCE,
+                    NoOpOperationCallback.INSTANCE);
+            diskComponentIx++;
+        }
+
+        LSMRTreeCursorInitialState initialState = new LSMRTreeCursorInitialState(numTrees, rtreeLeafFrameFactory,
+                rtreeInteriorFrameFactory, btreeLeafFrameFactory, ctx.getBTreeMultiComparator(), rTreeAccessors,
+                bTreeAccessors, includeMutableComponent, lsmHarness, comparatorFields, linearizerArray,
+                ctx.searchCallback, operationalComponents);
+        cursor.open(initialState, pred);
+    }
+
+    @Override
+    public boolean scheduleFlush(ILSMIndexOperationContext ctx, ILSMIOOperationCallback callback)
+            throws HyracksDataException {
+        if (!mutableComponent.isModified()) {
+            return false;
+        }
+        LSMComponentFileReferences componentFileRefs = fileManager.getRelFlushFileReference();
+        ILSMIndexOperationContext rctx = createOpContext(NoOpOperationCallback.INSTANCE);
+        LSMRTreeMutableComponent flushingComponent = (LSMRTreeMutableComponent) ctx.getComponentHolder().get(0);
+        rctx.setOperation(IndexOperation.FLUSH);
+        rctx.getComponentHolder().addAll(ctx.getComponentHolder());
+        LSMRTreeAccessor accessor = new LSMRTreeAccessor(lsmHarness, rctx);
+        ioScheduler.scheduleOperation(new LSMRTreeFlushOperation(accessor, flushingComponent, componentFileRefs
+                .getInsertIndexFileReference(), componentFileRefs.getDeleteIndexFileReference(), componentFileRefs
+                .getBloomFilterFileReference(), callback));
+        return true;
+    }
+
+    @Override
+    public ILSMComponent flush(ILSMIOOperation operation) throws HyracksDataException, IndexException {
+        LSMRTreeFlushOperation flushOp = (LSMRTreeFlushOperation) operation;
+        LSMRTreeMutableComponent flushingComponent = (LSMRTreeMutableComponent) flushOp.getFlushingComponent();
+        // Renaming order is critical because we use assume ordering when we
+        // read the file names when we open the tree.
+        // The RTree should be renamed before the BTree.
+
+        // scan the memory RTree
+        ITreeIndexAccessor memRTreeAccessor = flushingComponent.getRTree().createAccessor(
+                NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        RTreeSearchCursor rtreeScanCursor = (RTreeSearchCursor) memRTreeAccessor.createSearchCursor();
+        SearchPredicate rtreeNullPredicate = new SearchPredicate(null, null);
+        memRTreeAccessor.search(rtreeScanCursor, rtreeNullPredicate);
+        LSMRTreeImmutableComponent component = createDiskComponent(componentFactory, flushOp.getRTreeFlushTarget(),
+                flushOp.getBTreeFlushTarget(), flushOp.getBloomFilterFlushTarget(), true);
+        RTree diskRTree = component.getRTree();
+        IIndexBulkLoader rTreeBulkloader;
+        ITreeIndexCursor cursor;
+
+        IBinaryComparatorFactory[] linearizerArray = { linearizer };
+
+        if (rTreeTupleSorter == null) {
+            rTreeTupleSorter = new TreeTupleSorter(flushingComponent.getRTree().getFileId(), linearizerArray,
+                    rtreeLeafFrameFactory.createFrame(), rtreeLeafFrameFactory.createFrame(), flushingComponent
+                            .getRTree().getBufferCache(), comparatorFields);
+        } else {
+            rTreeTupleSorter.reset();
+        }
+        // BulkLoad the tuples from the in-memory tree into the new disk
+        // RTree.
+
+        boolean isEmpty = true;
+        try {
+            while (rtreeScanCursor.hasNext()) {
+                isEmpty = false;
+                rtreeScanCursor.next();
+                rTreeTupleSorter.insertTupleEntry(rtreeScanCursor.getPageId(), rtreeScanCursor.getTupleOffset());
+            }
+        } finally {
+            rtreeScanCursor.close();
+        }
+        if (!isEmpty) {
+            rTreeTupleSorter.sort();
+
+            rTreeBulkloader = diskRTree.createBulkLoader(1.0f, false, 0L);
+            cursor = rTreeTupleSorter;
+
+            try {
+                while (cursor.hasNext()) {
+                    cursor.next();
+                    ITupleReference frameTuple = cursor.getTuple();
+                    rTreeBulkloader.add(frameTuple);
+                }
+            } finally {
+                cursor.close();
+            }
+            rTreeBulkloader.end();
+        }
+
+        ITreeIndexAccessor memBTreeAccessor = flushingComponent.getBTree().createAccessor(
+                NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        RangePredicate btreeNullPredicate = new RangePredicate(null, null, true, true, null, null);
+        IIndexCursor btreeCountingCursor = ((BTreeAccessor) memBTreeAccessor).createCountingSearchCursor();
+        memBTreeAccessor.search(btreeCountingCursor, btreeNullPredicate);
+        long numBTreeTuples = 0L;
+        try {
+            while (btreeCountingCursor.hasNext()) {
+                btreeCountingCursor.next();
+                ITupleReference countTuple = btreeCountingCursor.getTuple();
+                numBTreeTuples = IntegerSerializerDeserializer.getInt(countTuple.getFieldData(0),
+                        countTuple.getFieldStart(0));
+            }
+        } finally {
+            btreeCountingCursor.close();
+        }
+
+        if (numBTreeTuples > 0) {
+            int maxBucketsPerElement = BloomCalculations.maxBucketsPerElement(numBTreeTuples);
+            BloomFilterSpecification bloomFilterSpec = BloomCalculations.computeBloomSpec(maxBucketsPerElement,
+                    MAX_BLOOM_FILTER_ACCEPTABLE_FALSE_POSITIVE_RATE);
+
+            IIndexCursor btreeScanCursor = memBTreeAccessor.createSearchCursor();
+            memBTreeAccessor.search(btreeScanCursor, btreeNullPredicate);
+            BTree diskBTree = component.getBTree();
+
+            // BulkLoad the tuples from the in-memory tree into the new disk BTree.
+            IIndexBulkLoader bTreeBulkloader = diskBTree.createBulkLoader(1.0f, false, numBTreeTuples);
+            IIndexBulkLoader builder = component.getBloomFilter().createBuilder(numBTreeTuples,
+                    bloomFilterSpec.getNumHashes(), bloomFilterSpec.getNumBucketsPerElements());
+            // scan the memory BTree
+            try {
+                while (btreeScanCursor.hasNext()) {
+                    btreeScanCursor.next();
+                    ITupleReference frameTuple = btreeScanCursor.getTuple();
+                    bTreeBulkloader.add(frameTuple);
+                    builder.add(frameTuple);
+                }
+            } finally {
+                btreeScanCursor.close();
+                builder.end();
+            }
+            bTreeBulkloader.end();
+        }
+
+        return component;
+    }
+
+    @Override
+    public void scheduleMerge(ILSMIndexOperationContext ctx, ILSMIOOperationCallback callback)
+            throws HyracksDataException, IndexException {
+        // Renaming order is critical because we use assume ordering when we
+        // read the file names when we open the tree.
+        // The RTree should be renamed before the BTree.
+        List<ILSMComponent> mergingComponents = ctx.getComponentHolder();
+        ILSMIndexOperationContext rctx = createOpContext(NoOpOperationCallback.INSTANCE);
+        rctx.getComponentHolder().addAll(mergingComponents);
+        ITreeIndexCursor cursor = new LSMRTreeSortedCursor(rctx, linearizer);
+        ISearchPredicate rtreeSearchPred = new SearchPredicate(null, null);
+        search(rctx, cursor, rtreeSearchPred);
+
+        rctx.setOperation(IndexOperation.MERGE);
+        LSMComponentFileReferences relMergeFileRefs = getMergeTargetFileName(mergingComponents);
+        ILSMIndexAccessorInternal accessor = new LSMRTreeAccessor(lsmHarness, rctx);
+        ioScheduler.scheduleOperation(new LSMRTreeMergeOperation((ILSMIndexAccessorInternal) accessor,
+                mergingComponents, cursor, relMergeFileRefs.getInsertIndexFileReference(), relMergeFileRefs
+                        .getDeleteIndexFileReference(), relMergeFileRefs.getBloomFilterFileReference(), callback));
+    }
+
+    @Override
+    public ILSMComponent merge(List<ILSMComponent> mergedComponents, ILSMIOOperation operation)
+            throws HyracksDataException, IndexException {
+        LSMRTreeMergeOperation mergeOp = (LSMRTreeMergeOperation) operation;
+        ITreeIndexCursor cursor = mergeOp.getCursor();
+        mergedComponents.addAll(mergeOp.getMergingComponents());
+
+        LSMRTreeImmutableComponent mergedComponent = createDiskComponent(componentFactory,
+                mergeOp.getRTreeMergeTarget(), mergeOp.getBTreeMergeTarget(), mergeOp.getBloomFilterMergeTarget(), true);
+        IIndexBulkLoader bulkLoader = mergedComponent.getRTree().createBulkLoader(1.0f, false, 0L);
+
+        try {
+            while (cursor.hasNext()) {
+                cursor.next();
+                ITupleReference frameTuple = cursor.getTuple();
+                bulkLoader.add(frameTuple);
+            }
+        } finally {
+            cursor.close();
+        }
+        bulkLoader.end();
+        return mergedComponent;
+    }
+
+    @Override
+    public ILSMIndexAccessorInternal createAccessor(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback) {
+        return new LSMRTreeAccessor(lsmHarness, createOpContext(modificationCallback));
+    }
+
+    public class LSMRTreeAccessor extends LSMTreeIndexAccessor {
+        public LSMRTreeAccessor(ILSMHarness lsmHarness, ILSMIndexOperationContext ctx) {
+            super(lsmHarness, ctx);
+        }
+
+        @Override
+        public ITreeIndexCursor createSearchCursor() {
+            return new LSMRTreeSearchCursor(ctx);
+        }
+
+        public MultiComparator getMultiComparator() {
+            LSMRTreeOpContext concreteCtx = (LSMRTreeOpContext) ctx;
+            return concreteCtx.rtreeOpContext.cmp;
+        }
+    }
+
+    private ILSMComponent createBulkLoadTarget() throws HyracksDataException, IndexException {
+        LSMComponentFileReferences componentFileRefs = fileManager.getRelFlushFileReference();
+        return createDiskComponent(componentFactory, componentFileRefs.getInsertIndexFileReference(),
+                componentFileRefs.getDeleteIndexFileReference(), componentFileRefs.getBloomFilterFileReference(), true);
+    }
+
+    @Override
+    public IIndexBulkLoader createBulkLoader(float fillLevel, boolean verifyInput, long numElementsHint)
+            throws TreeIndexException {
+        return new LSMRTreeBulkLoader(fillLevel, verifyInput, numElementsHint);
+    }
+
+    public class LSMRTreeBulkLoader implements IIndexBulkLoader {
+        private final ILSMComponent component;
+        private final IIndexBulkLoader bulkLoader;
+
+        public LSMRTreeBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
+                throws TreeIndexException {
+            // Note that by using a flush target file name, we state that the
+            // new bulk loaded tree is "newer" than any other merged tree.
+            try {
+                component = createBulkLoadTarget();
+            } catch (HyracksDataException e) {
+                throw new TreeIndexException(e);
+            } catch (IndexException e) {
+                throw new TreeIndexException(e);
+            }
+            bulkLoader = ((LSMRTreeImmutableComponent) component).getRTree().createBulkLoader(fillFactor, verifyInput,
+                    numElementsHint);
+        }
+
+        @Override
+        public void add(ITupleReference tuple) throws HyracksDataException, IndexException {
+            try {
+                bulkLoader.add(tuple);
+            } catch (IndexException e) {
+                handleException();
+                throw e;
+            } catch (HyracksDataException e) {
+                handleException();
+                throw e;
+            } catch (RuntimeException e) {
+                handleException();
+                throw e;
+            }
+        }
+
+        @Override
+        public void end() throws HyracksDataException, IndexException {
+            bulkLoader.end();
+            lsmHarness.addBulkLoadedComponent(component);
+        }
+
+        protected void handleException() throws HyracksDataException {
+            ((LSMRTreeImmutableComponent) component).getRTree().deactivate();
+            ((LSMRTreeImmutableComponent) component).getRTree().destroy();
+            ((LSMRTreeImmutableComponent) component).getBTree().deactivate();
+            ((LSMRTreeImmutableComponent) component).getBTree().destroy();
+            ((LSMRTreeImmutableComponent) component).getBloomFilter().deactivate();
+            ((LSMRTreeImmutableComponent) component).getBloomFilter().destroy();
+        }
+    }
+
+    @Override
+    public void markAsValid(ILSMComponent lsmComponent) throws HyracksDataException {
+        LSMRTreeImmutableComponent component = (LSMRTreeImmutableComponent) lsmComponent;
+        // Flush the bloom filter first.
+        int fileId = component.getBloomFilter().getFileId();
+        IBufferCache bufferCache = component.getBTree().getBufferCache();
+        int startPage = 0;
+        int maxPage = component.getBloomFilter().getNumPages();
+        forceFlushDirtyPages(bufferCache, fileId, startPage, maxPage);
+        forceFlushDirtyPages(component.getRTree());
+        markAsValidInternal(component.getRTree());
+        forceFlushDirtyPages(component.getBTree());
+        markAsValidInternal(component.getBTree());
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeAbstractCursor.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeAbstractCursor.java
new file mode 100644
index 0000000..5a72f29
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeAbstractCursor.java
@@ -0,0 +1,143 @@
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeRangeSearchCursor;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BloomFilterAwareBTreePointSearchCursor;
+import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeInteriorFrame;
+import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTreeSearchCursor;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.SearchPredicate;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+
+public abstract class LSMRTreeAbstractCursor implements ITreeIndexCursor {
+
+    protected RTreeSearchCursor[] rtreeCursors;
+    protected boolean open = false;
+    protected ITreeIndexCursor[] btreeCursors;
+    protected ITreeIndexAccessor[] rTreeAccessors;
+    protected ITreeIndexAccessor[] bTreeAccessors;
+    private MultiComparator btreeCmp;
+    protected int numberOfTrees;
+    protected SearchPredicate rtreeSearchPredicate;
+    protected RangePredicate btreeRangePredicate;
+    protected ITupleReference frameTuple;
+    protected boolean includeMemRTree;
+    protected ILSMHarness lsmHarness;
+    protected boolean foundNext;
+    protected final ILSMIndexOperationContext opCtx;
+
+    protected List<ILSMComponent> operationalComponents;
+
+    public LSMRTreeAbstractCursor(ILSMIndexOperationContext opCtx) {
+        super();
+        this.opCtx = opCtx;
+    }
+
+    public RTreeSearchCursor getCursor(int cursorIndex) {
+        return rtreeCursors[cursorIndex];
+    }
+
+    @Override
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws HyracksDataException {
+        LSMRTreeCursorInitialState lsmInitialState = (LSMRTreeCursorInitialState) initialState;
+        btreeCmp = lsmInitialState.getBTreeCmp();
+        includeMemRTree = lsmInitialState.getIncludeMemComponent();
+        operationalComponents = lsmInitialState.getOperationalComponents();
+        lsmHarness = lsmInitialState.getLSMHarness();
+        numberOfTrees = lsmInitialState.getNumberOfTrees();
+        rTreeAccessors = lsmInitialState.getRTreeAccessors();
+        bTreeAccessors = lsmInitialState.getBTreeAccessors();
+
+        rtreeCursors = new RTreeSearchCursor[numberOfTrees];
+        btreeCursors = new ITreeIndexCursor[numberOfTrees];
+
+        int i = 0;
+        if (includeMemRTree) {
+            rtreeCursors[i] = new RTreeSearchCursor((IRTreeInteriorFrame) lsmInitialState
+                    .getRTreeInteriorFrameFactory().createFrame(), (IRTreeLeafFrame) lsmInitialState
+                    .getRTreeLeafFrameFactory().createFrame());
+
+            // No need for a bloom filter for the in-memory BTree.
+            btreeCursors[i] = new BTreeRangeSearchCursor((IBTreeLeafFrame) lsmInitialState.getBTreeLeafFrameFactory()
+                    .createFrame(), false);
+            ++i;
+        }
+        for (; i < numberOfTrees; i++) {
+            rtreeCursors[i] = new RTreeSearchCursor((IRTreeInteriorFrame) lsmInitialState
+                    .getRTreeInteriorFrameFactory().createFrame(), (IRTreeLeafFrame) lsmInitialState
+                    .getRTreeLeafFrameFactory().createFrame());
+
+            btreeCursors[i] = new BloomFilterAwareBTreePointSearchCursor((IBTreeLeafFrame) lsmInitialState
+                    .getBTreeLeafFrameFactory().createFrame(), false,
+                    ((LSMRTreeImmutableComponent) operationalComponents.get(i)).getBloomFilter());
+        }
+
+        rtreeSearchPredicate = (SearchPredicate) searchPred;
+        btreeRangePredicate = new RangePredicate(null, null, true, true, btreeCmp, btreeCmp);
+
+        open = true;
+    }
+
+    @Override
+    public ICachedPage getPage() {
+        // do nothing
+        return null;
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        if (!open) {
+            return;
+        }
+
+        try {
+            if (rtreeCursors != null && btreeCursors != null) {
+                for (int i = 0; i < numberOfTrees; i++) {
+                    rtreeCursors[i].close();
+                    btreeCursors[i].close();
+                }
+            }
+            rtreeCursors = null;
+            btreeCursors = null;
+        } finally {
+            lsmHarness.endSearch(opCtx);
+        }
+
+        open = false;
+    }
+
+    @Override
+    public void setBufferCache(IBufferCache bufferCache) {
+        // do nothing
+    }
+
+    @Override
+    public void setFileId(int fileId) {
+        // do nothing
+    }
+
+    @Override
+    public ITupleReference getTuple() {
+        return frameTuple;
+    }
+
+    @Override
+    public boolean exclusiveLatchNodes() {
+        return false;
+    }
+
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeComponentFactory.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeComponentFactory.java
new file mode 100644
index 0000000..56e3d28
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeComponentFactory.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilterFactory;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponentFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+
+public class LSMRTreeComponentFactory implements ILSMComponentFactory {
+    private final TreeIndexFactory<RTree> rtreeFactory;
+    private final TreeIndexFactory<BTree> btreeFactory;
+    private final BloomFilterFactory bloomFilterFactory;
+
+    public LSMRTreeComponentFactory(TreeIndexFactory<RTree> rtreeFactory, TreeIndexFactory<BTree> btreeFactory,
+            BloomFilterFactory bloomFilterFactory) {
+        this.rtreeFactory = rtreeFactory;
+        this.btreeFactory = btreeFactory;
+        this.bloomFilterFactory = bloomFilterFactory;
+    }
+
+    @Override
+    public ILSMComponent createLSMComponentInstance(LSMComponentFileReferences cfr) throws IndexException,
+            HyracksDataException {
+        return new LSMRTreeImmutableComponent(rtreeFactory.createIndexInstance(cfr.getInsertIndexFileReference()),
+                btreeFactory.createIndexInstance(cfr.getDeleteIndexFileReference()),
+                bloomFilterFactory.createBloomFiltertInstance(cfr.getBloomFilterFileReference()));
+    }
+
+    @Override
+    public IBufferCache getBufferCache() {
+        return rtreeFactory.getBufferCache();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeCursorInitialState.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeCursorInitialState.java
new file mode 100644
index 0000000..590d5d8
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeCursorInitialState.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+
+public class LSMRTreeCursorInitialState implements ICursorInitialState {
+
+    private final int numberOfTrees;
+    private final ITreeIndexFrameFactory rtreeInteriorFrameFactory;
+    private final ITreeIndexFrameFactory rtreeLeafFrameFactory;
+    private final ITreeIndexFrameFactory btreeLeafFrameFactory;
+    private final MultiComparator btreeCmp;
+    private final MultiComparator hilbertCmp;
+    private final ITreeIndexAccessor[] rTreeAccessors;
+    private final ITreeIndexAccessor[] bTreeAccessors;
+    private final boolean includeMemRTree;
+    private final ILSMHarness lsmHarness;
+    private final int[] comparatorFields;
+
+    private ISearchOperationCallback searchCallback;
+    private final List<ILSMComponent> operationalComponents;
+
+    public LSMRTreeCursorInitialState(int numberOfTrees, ITreeIndexFrameFactory rtreeLeafFrameFactory,
+            ITreeIndexFrameFactory rtreeInteriorFrameFactory, ITreeIndexFrameFactory btreeLeafFrameFactory,
+            MultiComparator btreeCmp, ITreeIndexAccessor[] rTreeAccessors, ITreeIndexAccessor[] bTreeAccessors,
+            boolean includeMemRTree, ILSMHarness lsmHarness, int[] comparatorFields,
+            IBinaryComparatorFactory[] linearizerArray, ISearchOperationCallback searchCallback,
+            List<ILSMComponent> operationalComponents) {
+        this.numberOfTrees = numberOfTrees;
+        this.rtreeLeafFrameFactory = rtreeLeafFrameFactory;
+        this.rtreeInteriorFrameFactory = rtreeInteriorFrameFactory;
+        this.btreeLeafFrameFactory = btreeLeafFrameFactory;
+        this.btreeCmp = btreeCmp;
+        this.rTreeAccessors = rTreeAccessors;
+        this.bTreeAccessors = bTreeAccessors;
+        this.includeMemRTree = includeMemRTree;
+        this.lsmHarness = lsmHarness;
+        this.comparatorFields = comparatorFields;
+        this.hilbertCmp = MultiComparator.create(linearizerArray);
+        this.searchCallback = searchCallback;
+        this.operationalComponents = operationalComponents;
+    }
+
+    public MultiComparator getHilbertCmp() {
+        return hilbertCmp;
+    }
+
+    public int[] getComparatorFields() {
+        return comparatorFields;
+    }
+
+    public int getNumberOfTrees() {
+        return numberOfTrees;
+    }
+
+    public ITreeIndexFrameFactory getRTreeInteriorFrameFactory() {
+        return rtreeInteriorFrameFactory;
+    }
+
+    public ITreeIndexFrameFactory getRTreeLeafFrameFactory() {
+        return rtreeLeafFrameFactory;
+    }
+
+    public ITreeIndexFrameFactory getBTreeLeafFrameFactory() {
+        return btreeLeafFrameFactory;
+    }
+
+    public MultiComparator getBTreeCmp() {
+        return btreeCmp;
+    }
+
+    @Override
+    public ICachedPage getPage() {
+        return null;
+    }
+
+    @Override
+    public void setPage(ICachedPage page) {
+    }
+
+    public List<ILSMComponent> getOperationalComponents() {
+        return operationalComponents;
+    }
+
+    public ITreeIndexAccessor[] getRTreeAccessors() {
+        return rTreeAccessors;
+    }
+
+    public ITreeIndexAccessor[] getBTreeAccessors() {
+        return bTreeAccessors;
+    }
+
+    public boolean getIncludeMemComponent() {
+        return includeMemRTree;
+    }
+
+    public ILSMHarness getLSMHarness() {
+        return lsmHarness;
+    }
+
+    @Override
+    public ISearchOperationCallback getSearchOperationCallback() {
+        return searchCallback;
+    }
+
+    @Override
+    public void setSearchOperationCallback(ISearchOperationCallback searchCallback) {
+        this.searchCallback = searchCallback;
+    }
+
+    @Override
+    public MultiComparator getOriginalKeyComparator() {
+        return null;
+    }
+
+    @Override
+    public void setOriginialKeyComparator(MultiComparator originalCmp) {
+    }
+
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeFileManager.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeFileManager.java
new file mode 100644
index 0000000..851235e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeFileManager.java
@@ -0,0 +1,193 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Date;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractLSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class LSMRTreeFileManager extends AbstractLSMIndexFileManager {
+    private static final String RTREE_STRING = "r";
+    private static final String BTREE_STRING = "b";
+
+    private final TreeIndexFactory<? extends ITreeIndex> rtreeFactory;
+    private final TreeIndexFactory<? extends ITreeIndex> btreeFactory;
+
+    private static FilenameFilter btreeFilter = new FilenameFilter() {
+        public boolean accept(File dir, String name) {
+            return !name.startsWith(".") && name.endsWith(BTREE_STRING);
+        }
+    };
+
+    private static FilenameFilter rtreeFilter = new FilenameFilter() {
+        public boolean accept(File dir, String name) {
+            return !name.startsWith(".") && name.endsWith(RTREE_STRING);
+        }
+    };
+
+    public LSMRTreeFileManager(IIOManager ioManager, IFileMapProvider fileMapProvider, FileReference file,
+            TreeIndexFactory<? extends ITreeIndex> rtreeFactory, TreeIndexFactory<? extends ITreeIndex> btreeFactory,
+            int startIODeviceIndex) {
+        super(ioManager, fileMapProvider, file, null, startIODeviceIndex);
+        this.rtreeFactory = rtreeFactory;
+        this.btreeFactory = btreeFactory;
+    }
+
+    @Override
+    public LSMComponentFileReferences getRelFlushFileReference() {
+        Date date = new Date();
+        String ts = formatter.format(date);
+        String baseName = baseDir + ts + SPLIT_STRING + ts;
+        // Begin timestamp and end timestamp are identical since it is a flush
+        return new LSMComponentFileReferences(createFlushFile(baseName + SPLIT_STRING + RTREE_STRING),
+                createFlushFile(baseName + SPLIT_STRING + BTREE_STRING), createFlushFile(baseName + SPLIT_STRING
+                        + BLOOM_FILTER_STRING));
+    }
+
+    @Override
+    public LSMComponentFileReferences getRelMergeFileReference(String firstFileName, String lastFileName)
+            throws HyracksDataException {
+        String[] firstTimestampRange = firstFileName.split(SPLIT_STRING);
+        String[] lastTimestampRange = lastFileName.split(SPLIT_STRING);
+
+        String baseName = baseDir + firstTimestampRange[0] + SPLIT_STRING + lastTimestampRange[1];
+        // Get the range of timestamps by taking the earliest and the latest timestamps
+        return new LSMComponentFileReferences(createMergeFile(baseName + SPLIT_STRING + RTREE_STRING),
+                createMergeFile(baseName + SPLIT_STRING + BTREE_STRING), createMergeFile(baseName + SPLIT_STRING
+                        + BLOOM_FILTER_STRING));
+    }
+
+    @Override
+    public List<LSMComponentFileReferences> cleanupAndGetValidFiles() throws HyracksDataException, IndexException {
+        List<LSMComponentFileReferences> validFiles = new ArrayList<LSMComponentFileReferences>();
+        ArrayList<ComparableFileName> allRTreeFiles = new ArrayList<ComparableFileName>();
+        ArrayList<ComparableFileName> allBTreeFiles = new ArrayList<ComparableFileName>();
+        ArrayList<ComparableFileName> allBloomFilterFiles = new ArrayList<ComparableFileName>();
+
+        // Gather files from all IODeviceHandles.
+        for (IODeviceHandle dev : ioManager.getIODevices()) {
+            cleanupAndGetValidFilesInternal(dev, btreeFilter, btreeFactory, allBTreeFiles);
+            HashSet<String> btreeFilesSet = new HashSet<String>();
+            for (ComparableFileName cmpFileName : allBTreeFiles) {
+                int index = cmpFileName.fileName.lastIndexOf(SPLIT_STRING);
+                btreeFilesSet.add(cmpFileName.fileName.substring(0, index));
+            }
+            validateFiles(dev, btreeFilesSet, allRTreeFiles, rtreeFilter, rtreeFactory);
+            validateFiles(dev, btreeFilesSet, allBloomFilterFiles, bloomFilterFilter, null);
+        }
+        // Sanity check.
+        if (allRTreeFiles.size() != allBTreeFiles.size() || allBTreeFiles.size() != allBloomFilterFiles.size()) {
+            throw new HyracksDataException(
+                    "Unequal number of valid RTree, BTree, and Bloom Filter files found. Aborting cleanup.");
+        }
+
+        // Trivial cases.
+        if (allRTreeFiles.isEmpty() || allBTreeFiles.isEmpty() || allBloomFilterFiles.isEmpty()) {
+            return validFiles;
+        }
+
+        if (allRTreeFiles.size() == 1 && allBTreeFiles.size() == 1 && allBloomFilterFiles.size() == 1) {
+            validFiles.add(new LSMComponentFileReferences(allRTreeFiles.get(0).fileRef, allBTreeFiles.get(0).fileRef,
+                    allBloomFilterFiles.get(0).fileRef));
+            return validFiles;
+        }
+
+        // Sorts files names from earliest to latest timestamp.
+        Collections.sort(allRTreeFiles);
+        Collections.sort(allBTreeFiles);
+        Collections.sort(allBloomFilterFiles);
+
+        List<ComparableFileName> validComparableRTreeFiles = new ArrayList<ComparableFileName>();
+        ComparableFileName lastRTree = allRTreeFiles.get(0);
+        validComparableRTreeFiles.add(lastRTree);
+
+        List<ComparableFileName> validComparableBTreeFiles = new ArrayList<ComparableFileName>();
+        ComparableFileName lastBTree = allBTreeFiles.get(0);
+        validComparableBTreeFiles.add(lastBTree);
+
+        List<ComparableFileName> validComparableBloomFilterFiles = new ArrayList<ComparableFileName>();
+        ComparableFileName lastBloomFilter = allBloomFilterFiles.get(0);
+        validComparableBloomFilterFiles.add(lastBloomFilter);
+
+        for (int i = 1; i < allRTreeFiles.size(); i++) {
+            ComparableFileName currentRTree = allRTreeFiles.get(i);
+            ComparableFileName currentBTree = allBTreeFiles.get(i);
+            ComparableFileName currentBloomFilter = allBloomFilterFiles.get(i);
+            // Current start timestamp is greater than last stop timestamp.
+            if (currentRTree.interval[0].compareTo(lastRTree.interval[1]) > 0
+                    && currentBTree.interval[0].compareTo(lastBTree.interval[1]) > 0
+                    && currentBloomFilter.interval[0].compareTo(lastBloomFilter.interval[1]) > 0) {
+                validComparableRTreeFiles.add(currentRTree);
+                validComparableBTreeFiles.add(currentBTree);
+                validComparableBloomFilterFiles.add(currentBloomFilter);
+                lastRTree = currentRTree;
+                lastBTree = currentBTree;
+                lastBloomFilter = currentBloomFilter;
+            } else if (currentRTree.interval[0].compareTo(lastRTree.interval[0]) >= 0
+                    && currentRTree.interval[1].compareTo(lastRTree.interval[1]) <= 0
+                    && currentBTree.interval[0].compareTo(lastBTree.interval[0]) >= 0
+                    && currentBTree.interval[1].compareTo(lastBTree.interval[1]) <= 0
+                    && currentBloomFilter.interval[0].compareTo(lastBloomFilter.interval[0]) >= 0
+                    && currentBloomFilter.interval[1].compareTo(lastBloomFilter.interval[1]) <= 0) {
+                // Invalid files are completely contained in last interval.
+                File invalidRTreeFile = new File(currentRTree.fullPath);
+                invalidRTreeFile.delete();
+                File invalidBTreeFile = new File(currentBTree.fullPath);
+                invalidBTreeFile.delete();
+                File invalidBloomFilterFile = new File(currentBloomFilter.fullPath);
+                invalidBloomFilterFile.delete();
+            } else {
+                // This scenario should not be possible.
+                throw new HyracksDataException("Found LSM files with overlapping but not contained timetamp intervals.");
+            }
+        }
+
+        // Sort valid files in reverse lexicographical order, such that newer
+        // files come first.
+        Collections.sort(validComparableRTreeFiles, recencyCmp);
+        Collections.sort(validComparableBTreeFiles, recencyCmp);
+        Collections.sort(validComparableBloomFilterFiles, recencyCmp);
+
+        Iterator<ComparableFileName> rtreeFileIter = validComparableRTreeFiles.iterator();
+        Iterator<ComparableFileName> btreeFileIter = validComparableBTreeFiles.iterator();
+        Iterator<ComparableFileName> bloomFilterFileIter = validComparableBloomFilterFiles.iterator();
+        while (rtreeFileIter.hasNext() && btreeFileIter.hasNext()) {
+            ComparableFileName cmpRTreeFileName = rtreeFileIter.next();
+            ComparableFileName cmpBTreeFileName = btreeFileIter.next();
+            ComparableFileName cmpBloomFilterFileName = bloomFilterFileIter.next();
+            validFiles.add(new LSMComponentFileReferences(cmpRTreeFileName.fileRef, cmpBTreeFileName.fileRef,
+                    cmpBloomFilterFileName.fileRef));
+        }
+
+        return validFiles;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeFlushOperation.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeFlushOperation.java
new file mode 100644
index 0000000..7b7f2bc
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeFlushOperation.java
@@ -0,0 +1,77 @@
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessorInternal;
+
+public class LSMRTreeFlushOperation implements ILSMIOOperation {
+
+    private final ILSMIndexAccessorInternal accessor;
+    private final ILSMComponent flushingComponent;
+    private final FileReference rtreeFlushTarget;
+    private final FileReference btreeFlushTarget;
+    private final FileReference bloomFilterFlushTarget;
+    private final ILSMIOOperationCallback callback;
+
+    public LSMRTreeFlushOperation(ILSMIndexAccessorInternal accessor, ILSMComponent flushingComponent,
+            FileReference rtreeFlushTarget, FileReference btreeFlushTarget, FileReference bloomFilterFlushTarget,
+            ILSMIOOperationCallback callback) {
+        this.accessor = accessor;
+        this.flushingComponent = flushingComponent;
+        this.rtreeFlushTarget = rtreeFlushTarget;
+        this.btreeFlushTarget = btreeFlushTarget;
+        this.bloomFilterFlushTarget = bloomFilterFlushTarget;
+        this.callback = callback;
+    }
+
+    @Override
+    public Set<IODeviceHandle> getReadDevices() {
+        return Collections.emptySet();
+    }
+
+    @Override
+    public Set<IODeviceHandle> getWriteDevices() {
+        Set<IODeviceHandle> devs = new HashSet<IODeviceHandle>();
+        devs.add(rtreeFlushTarget.getDeviceHandle());
+        if (btreeFlushTarget != null) {
+            devs.add(btreeFlushTarget.getDeviceHandle());
+            devs.add(bloomFilterFlushTarget.getDeviceHandle());
+        }
+        return devs;
+    }
+
+    @Override
+    public void perform() throws HyracksDataException, IndexException {
+        accessor.flush(this);
+    }
+
+    @Override
+    public ILSMIOOperationCallback getCallback() {
+        return callback;
+    }
+
+    public FileReference getRTreeFlushTarget() {
+        return rtreeFlushTarget;
+    }
+
+    public FileReference getBTreeFlushTarget() {
+        return btreeFlushTarget;
+    }
+
+    public FileReference getBloomFilterFlushTarget() {
+        return bloomFilterFlushTarget;
+    }
+
+    public ILSMComponent getFlushingComponent() {
+        return flushingComponent;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeImmutableComponent.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeImmutableComponent.java
new file mode 100644
index 0000000..8d20c14
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeImmutableComponent.java
@@ -0,0 +1,43 @@
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilter;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractImmutableLSMComponent;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
+
+public class LSMRTreeImmutableComponent extends AbstractImmutableLSMComponent {
+    private final RTree rtree;
+    private final BTree btree;
+    private final BloomFilter bloomFilter;
+
+    public LSMRTreeImmutableComponent(RTree rtree, BTree btree, BloomFilter bloomFilter) {
+        this.rtree = rtree;
+        this.btree = btree;
+        this.bloomFilter = bloomFilter;
+    }
+
+    @Override
+    public void destroy() throws HyracksDataException {
+        rtree.deactivate();
+        rtree.destroy();
+        if (btree != null) {
+            btree.deactivate();
+            btree.destroy();
+            bloomFilter.deactivate();
+            bloomFilter.destroy();
+        }
+    }
+
+    public RTree getRTree() {
+        return rtree;
+    }
+
+    public BTree getBTree() {
+        return btree;
+    }
+
+    public BloomFilter getBloomFilter() {
+        return bloomFilter;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeMergeOperation.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeMergeOperation.java
new file mode 100644
index 0000000..0e05a93
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeMergeOperation.java
@@ -0,0 +1,92 @@
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessorInternal;
+
+public class LSMRTreeMergeOperation implements ILSMIOOperation {
+    private final ILSMIndexAccessorInternal accessor;
+    private final List<ILSMComponent> mergingComponents;
+    private final ITreeIndexCursor cursor;
+    private final FileReference rtreeMergeTarget;
+    private final FileReference btreeMergeTarget;
+    private final FileReference bloomFilterMergeTarget;
+    private final ILSMIOOperationCallback callback;
+
+    public LSMRTreeMergeOperation(ILSMIndexAccessorInternal accessor, List<ILSMComponent> mergingComponents,
+            ITreeIndexCursor cursor, FileReference rtreeMergeTarget, FileReference btreeMergeTarget,
+            FileReference bloomFilterMergeTarget, ILSMIOOperationCallback callback) {
+        this.accessor = accessor;
+        this.mergingComponents = mergingComponents;
+        this.cursor = cursor;
+        this.rtreeMergeTarget = rtreeMergeTarget;
+        this.btreeMergeTarget = btreeMergeTarget;
+        this.bloomFilterMergeTarget = bloomFilterMergeTarget;
+        this.callback = callback;
+    }
+
+    @Override
+    public Set<IODeviceHandle> getReadDevices() {
+        Set<IODeviceHandle> devs = new HashSet<IODeviceHandle>();
+        for (ILSMComponent o : mergingComponents) {
+            LSMRTreeImmutableComponent component = (LSMRTreeImmutableComponent) o;
+            devs.add(component.getRTree().getFileReference().getDeviceHandle());
+            if (component.getBTree() != null) {
+                devs.add(component.getBTree().getFileReference().getDeviceHandle());
+                devs.add(component.getBloomFilter().getFileReference().getDeviceHandle());
+            }
+        }
+        return devs;
+    }
+
+    @Override
+    public Set<IODeviceHandle> getWriteDevices() {
+        Set<IODeviceHandle> devs = new HashSet<IODeviceHandle>();
+        devs.add(rtreeMergeTarget.getDeviceHandle());
+        if (btreeMergeTarget != null) {
+            devs.add(btreeMergeTarget.getDeviceHandle());
+            devs.add(bloomFilterMergeTarget.getDeviceHandle());
+        }
+        return devs;
+    }
+
+    @Override
+    public void perform() throws HyracksDataException, IndexException {
+        accessor.merge(this);
+    }
+
+    @Override
+    public ILSMIOOperationCallback getCallback() {
+        return callback;
+    }
+
+    public FileReference getRTreeMergeTarget() {
+        return rtreeMergeTarget;
+    }
+
+    public FileReference getBTreeMergeTarget() {
+        return btreeMergeTarget;
+    }
+
+    public FileReference getBloomFilterMergeTarget() {
+        return bloomFilterMergeTarget;
+    }
+
+    public ITreeIndexCursor getCursor() {
+        return cursor;
+    }
+
+    public List<ILSMComponent> getMergingComponents() {
+        return mergingComponents;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeMutableComponent.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeMutableComponent.java
new file mode 100644
index 0000000..2586d58
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeMutableComponent.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractMutableLSMComponent;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
+
+public class LSMRTreeMutableComponent extends AbstractMutableLSMComponent {
+
+    private final RTree rtree;
+    private final BTree btree;
+    private final IInMemoryFreePageManager mfpm;
+
+    public LSMRTreeMutableComponent(RTree rtree, BTree btree, IInMemoryFreePageManager mfpm) {
+        this.rtree = rtree;
+        this.btree = btree;
+        this.mfpm = mfpm;
+    }
+
+    public RTree getRTree() {
+        return rtree;
+    }
+
+    public BTree getBTree() {
+        return btree;
+    }
+
+    @Override
+    protected boolean isFull() {
+        return mfpm.isFull();
+    }
+
+    @Override
+    protected void reset() throws HyracksDataException {
+        super.reset();
+        rtree.clear();
+        if (btree != null) {
+            btree.clear();
+        }
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeOpContext.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeOpContext.java
new file mode 100644
index 0000000..b8805d1
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeOpContext.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import java.util.LinkedList;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeOpContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrame;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeInteriorFrame;
+import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTreeOpContext;
+
+public final class LSMRTreeOpContext implements ILSMIndexOperationContext {
+
+    public RTreeOpContext rtreeOpContext;
+    public BTreeOpContext btreeOpContext;
+    public final RTree.RTreeAccessor memRTreeAccessor;
+    public final BTree.BTreeAccessor memBTreeAccessor;
+    private IndexOperation op;
+    public final List<ILSMComponent> componentHolder;
+    public final IModificationOperationCallback modificationCallback;
+    public final ISearchOperationCallback searchCallback;
+
+    public LSMRTreeOpContext(RTree.RTreeAccessor memRtreeAccessor, IRTreeLeafFrame rtreeLeafFrame,
+            IRTreeInteriorFrame rtreeInteriorFrame, ITreeIndexMetaDataFrame rtreeMetaFrame, int rTreeHeightHint,
+            BTree.BTreeAccessor memBtreeAccessor, ITreeIndexFrameFactory btreeLeafFrameFactory,
+            ITreeIndexFrameFactory btreeInteriorFrameFactory, ITreeIndexMetaDataFrame btreeMetaFrame,
+            IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
+            IModificationOperationCallback modificationCallback, ISearchOperationCallback searchCallback) {
+        this.memRTreeAccessor = memRtreeAccessor;
+        this.memBTreeAccessor = memBtreeAccessor;
+        this.componentHolder = new LinkedList<ILSMComponent>();
+        this.modificationCallback = modificationCallback;
+        this.searchCallback = searchCallback;
+        this.rtreeOpContext = new RTreeOpContext(rtreeLeafFrame, rtreeInteriorFrame, rtreeMetaFrame, rtreeCmpFactories,
+                rTreeHeightHint, NoOpOperationCallback.INSTANCE);
+        this.btreeOpContext = new BTreeOpContext(memBtreeAccessor, btreeLeafFrameFactory, btreeInteriorFrameFactory,
+                btreeMetaFrame, btreeCmpFactories, NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+    }
+
+    public void setOperation(IndexOperation newOp) {
+        reset();
+        if (newOp == IndexOperation.INSERT) {
+            rtreeOpContext.setOperation(newOp);
+        } else if (newOp == IndexOperation.DELETE) {
+            btreeOpContext.setOperation(IndexOperation.INSERT);
+        }
+        this.op = newOp;
+    }
+
+    @Override
+    public void reset() {
+        componentHolder.clear();
+    }
+
+    @Override
+    public IndexOperation getOperation() {
+        return op;
+    }
+
+    public MultiComparator getBTreeMultiComparator() {
+        return btreeOpContext.cmp;
+    }
+
+    @Override
+    public List<ILSMComponent> getComponentHolder() {
+        return componentHolder;
+    }
+
+    @Override
+    public ISearchOperationCallback getSearchOperationCallback() {
+        return searchCallback;
+    }
+
+    @Override
+    public IModificationOperationCallback getModificationCallback() {
+        return modificationCallback;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeSearchCursor.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeSearchCursor.java
new file mode 100644
index 0000000..966ed8d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeSearchCursor.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+
+public class LSMRTreeSearchCursor extends LSMRTreeAbstractCursor {
+
+    private int currentCursor;
+
+    public LSMRTreeSearchCursor(ILSMIndexOperationContext opCtx) {
+        super(opCtx);
+        currentCursor = 0;
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        super.close();
+        currentCursor = 0;
+    }
+
+    @Override
+    public void reset() throws HyracksDataException {
+        if (!open) {
+            return;
+        }
+
+        currentCursor = 0;
+        foundNext = false;
+        try {
+            for (int i = 0; i < numberOfTrees; i++) {
+                rtreeCursors[i].close();
+                btreeCursors[i].close();
+            }
+            rtreeCursors = null;
+            btreeCursors = null;
+        } finally {
+            lsmHarness.endSearch(opCtx);
+        }
+    }
+
+    private void searchNextCursor() throws HyracksDataException {
+        if (currentCursor < numberOfTrees) {
+            rtreeCursors[currentCursor].reset();
+            try {
+                rTreeAccessors[currentCursor].search(rtreeCursors[currentCursor], rtreeSearchPredicate);
+            } catch (IndexException e) {
+                throw new HyracksDataException(e);
+            }
+        }
+    }
+
+    @Override
+    public boolean hasNext() throws HyracksDataException, IndexException {
+        if (foundNext) {
+            return true;
+        }
+        while (currentCursor < numberOfTrees) {
+            while (rtreeCursors[currentCursor].hasNext()) {
+                rtreeCursors[currentCursor].next();
+                ITupleReference currentTuple = rtreeCursors[currentCursor].getTuple();
+
+                boolean killerTupleFound = false;
+                for (int i = 0; i <= currentCursor; i++) {
+                    try {
+                        btreeCursors[i].reset();
+                        btreeRangePredicate.setHighKey(currentTuple, true);
+                        btreeRangePredicate.setLowKey(currentTuple, true);
+                        bTreeAccessors[i].search(btreeCursors[i], btreeRangePredicate);
+                    } catch (IndexException e) {
+                        throw new HyracksDataException(e);
+                    }
+                    try {
+                        if (btreeCursors[i].hasNext()) {
+                            killerTupleFound = true;
+                            break;
+                        }
+                    } finally {
+                        btreeCursors[i].close();
+                    }
+                }
+                if (!killerTupleFound) {
+                    frameTuple = currentTuple;
+                    foundNext = true;
+                    return true;
+                }
+            }
+            rtreeCursors[currentCursor].close();
+            currentCursor++;
+            searchNextCursor();
+        }
+        return false;
+    }
+
+    @Override
+    public void next() throws HyracksDataException {
+        foundNext = false;
+    }
+
+    @Override
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws HyracksDataException {
+        super.open(initialState, searchPred);
+        searchNextCursor();
+    }
+
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeSortedCursor.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeSortedCursor.java
new file mode 100644
index 0000000..02a1876
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeSortedCursor.java
@@ -0,0 +1,152 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparator;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+
+public class LSMRTreeSortedCursor extends LSMRTreeAbstractCursor {
+
+    private ILinearizeComparator linearizeCmp;
+    private boolean[] depletedRtreeCursors;
+    private int foundIn = -1;
+
+    public LSMRTreeSortedCursor(ILSMIndexOperationContext opCtx, ILinearizeComparatorFactory linearizer)
+            throws HyracksDataException {
+        super(opCtx);
+        this.linearizeCmp = linearizer.createBinaryComparator();
+        reset();
+    }
+
+    @Override
+    public void reset() throws HyracksDataException {
+        depletedRtreeCursors = new boolean[numberOfTrees];
+        foundNext = false;
+        try {
+            for (int i = 0; i < numberOfTrees; i++) {
+                rtreeCursors[i].reset();
+                try {
+                    rTreeAccessors[i].search(rtreeCursors[i], rtreeSearchPredicate);
+                } catch (IndexException e) {
+                    throw new HyracksDataException(e);
+                }
+                if (rtreeCursors[i].hasNext()) {
+                    rtreeCursors[i].next();
+                } else {
+                    depletedRtreeCursors[i] = true;
+                }
+            }
+        } finally {
+            if (open) {
+                lsmHarness.endSearch(opCtx);
+            }
+        }
+    }
+
+    @Override
+    public boolean hasNext() throws HyracksDataException, IndexException {
+        while (!foundNext) {
+            frameTuple = null;
+
+            if (foundIn != -1) {
+                if (rtreeCursors[foundIn].hasNext()) {
+                    rtreeCursors[foundIn].next();
+                } else {
+                    depletedRtreeCursors[foundIn] = true;
+                }
+            }
+
+            foundIn = -1;
+            for (int i = 0; i < numberOfTrees; i++) {
+                if (depletedRtreeCursors[i])
+                    continue;
+
+                if (frameTuple == null) {
+                    frameTuple = rtreeCursors[i].getTuple();
+                    foundIn = i;
+                    continue;
+                }
+
+                if (linearizeCmp.compare(frameTuple.getFieldData(0), frameTuple.getFieldStart(0),
+                        frameTuple.getFieldLength(0) * linearizeCmp.getDimensions(), rtreeCursors[i].getTuple()
+                                .getFieldData(0), rtreeCursors[i].getTuple().getFieldStart(0), rtreeCursors[i]
+                                .getTuple().getFieldLength(0) * linearizeCmp.getDimensions()) <= 0) {
+                    frameTuple = rtreeCursors[i].getTuple();
+                    foundIn = i;
+                }
+            }
+
+            if (foundIn == -1)
+                return false;
+
+            boolean killed = false;
+            for (int i = 0; i < foundIn; i++) {
+                try {
+                    btreeCursors[i].reset();
+                    btreeRangePredicate.setHighKey(frameTuple, true);
+                    btreeRangePredicate.setLowKey(frameTuple, true);
+                    bTreeAccessors[i].search(btreeCursors[i], btreeRangePredicate);
+                } catch (IndexException e) {
+                    throw new HyracksDataException(e);
+                }
+                try {
+                    if (btreeCursors[i].hasNext()) {
+                        killed = true;
+                        break;
+                    }
+                } finally {
+                    btreeCursors[i].close();
+                }
+            }
+            if (!killed) {
+                foundNext = true;
+            }
+        }
+
+        return true;
+    }
+
+    @Override
+    public void next() throws HyracksDataException {
+        foundNext = false;
+    }
+
+    @Override
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws HyracksDataException {
+        super.open(initialState, searchPred);
+
+        depletedRtreeCursors = new boolean[numberOfTrees];
+        foundNext = false;
+        for (int i = 0; i < numberOfTrees; i++) {
+            rtreeCursors[i].reset();
+            try {
+                rTreeAccessors[i].search(rtreeCursors[i], rtreeSearchPredicate);
+            } catch (IndexException e) {
+                throw new HyracksDataException(e);
+            }
+            if (rtreeCursors[i].hasNext()) {
+                rtreeCursors[i].next();
+            } else {
+                depletedRtreeCursors[i] = true;
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuples.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuples.java
new file mode 100644
index 0000000..be9073e
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuples.java
@@ -0,0 +1,438 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import java.util.List;
+import java.util.ListIterator;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeRangeSearchCursor;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponentFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessorInternal;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMTreeIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTreeSearchCursor;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.SearchPredicate;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class LSMRTreeWithAntiMatterTuples extends AbstractLSMRTree {
+
+    private TreeTupleSorter bTreeTupleSorter;
+
+    // On-disk components.
+    // For creating RTree's used in bulk load. Different from diskRTreeFactory
+    // because it should have a different tuple writer in it's leaf frames.
+    private final ILSMComponentFactory bulkLoaComponentFactory;
+
+    public LSMRTreeWithAntiMatterTuples(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, ITreeIndexFrameFactory rtreeInteriorFrameFactory,
+            ITreeIndexFrameFactory rtreeLeafFrameFactory, ITreeIndexFrameFactory btreeInteriorFrameFactory,
+            ITreeIndexFrameFactory btreeLeafFrameFactory, ILSMIndexFileManager fileManager,
+            TreeIndexFactory<RTree> diskRTreeFactory, TreeIndexFactory<RTree> bulkLoadRTreeFactory,
+            IFileMapProvider diskFileMapProvider, int fieldCount, IBinaryComparatorFactory[] rtreeCmpFactories,
+            IBinaryComparatorFactory[] btreeCmpFactories, ILinearizeComparatorFactory linearizer,
+            int[] comparatorFields, IBinaryComparatorFactory[] linearizerArray, ILSMMergePolicy mergePolicy,
+            ILSMOperationTrackerFactory opTrackerFactory, ILSMIOOperationScheduler ioScheduler,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
+        super(memBufferCache, memFreePageManager, rtreeInteriorFrameFactory, rtreeLeafFrameFactory,
+                btreeInteriorFrameFactory, btreeLeafFrameFactory, fileManager, diskRTreeFactory,
+                new LSMRTreeWithAntiMatterTuplesComponentFactory(diskRTreeFactory), diskFileMapProvider, fieldCount,
+                rtreeCmpFactories, btreeCmpFactories, linearizer, comparatorFields, linearizerArray, mergePolicy,
+                opTrackerFactory, ioScheduler, ioOpCallbackProvider);
+        bulkLoaComponentFactory = new LSMRTreeWithAntiMatterTuplesComponentFactory(bulkLoadRTreeFactory);
+        this.bTreeTupleSorter = null;
+    }
+
+    @Override
+    public synchronized void activate() throws HyracksDataException {
+        super.activate();
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        immutableComponents.clear();
+        List<LSMComponentFileReferences> validFileReferences;
+        try {
+            validFileReferences = fileManager.cleanupAndGetValidFiles();
+        } catch (IndexException e) {
+            throw new HyracksDataException(e);
+        }
+        for (LSMComponentFileReferences lsmComonentFileReference : validFileReferences) {
+            LSMRTreeImmutableComponent component;
+            try {
+                component = createDiskComponent(componentFactory,
+                        lsmComonentFileReference.getInsertIndexFileReference(), null, null, false);
+            } catch (IndexException e) {
+                throw new HyracksDataException(e);
+            }
+            immutableComponents.add(component);
+        }
+        isActivated = true;
+    }
+
+    @Override
+    public synchronized void deactivate(boolean flushOnExit) throws HyracksDataException {
+        super.deactivate(flushOnExit);
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        for (ILSMComponent c : immutableComponents) {
+            RTree rtree = (RTree) ((LSMRTreeImmutableComponent) c).getRTree();
+            rtree.deactivate();
+        }
+        isActivated = false;
+    }
+
+    @Override
+    public synchronized void deactivate() throws HyracksDataException {
+        deactivate(true);
+    }
+
+    @Override
+    public synchronized void destroy() throws HyracksDataException {
+        super.destroy();
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        for (ILSMComponent c : immutableComponents) {
+            RTree rtree = (RTree) ((LSMRTreeImmutableComponent) c).getRTree();
+            rtree.destroy();
+        }
+        fileManager.deleteDirs();
+    }
+
+    @Override
+    public synchronized void clear() throws HyracksDataException {
+        super.clear();
+        List<ILSMComponent> immutableComponents = componentsRef.get();
+        for (ILSMComponent c : immutableComponents) {
+            RTree rtree = (RTree) ((LSMRTreeImmutableComponent) c).getRTree();
+            rtree.deactivate();
+            rtree.destroy();
+        }
+        immutableComponents.clear();
+    }
+
+    @Override
+    public void search(ILSMIndexOperationContext ictx, IIndexCursor cursor, ISearchPredicate pred)
+            throws HyracksDataException, IndexException {
+        LSMRTreeOpContext ctx = (LSMRTreeOpContext) ictx;
+        List<ILSMComponent> operationalComponents = ictx.getComponentHolder();
+        boolean includeMutableComponent = operationalComponents.get(0) == mutableComponent;
+        LSMRTreeWithAntiMatterTuplesSearchCursor lsmTreeCursor = (LSMRTreeWithAntiMatterTuplesSearchCursor) cursor;
+        int numDiskRComponents = operationalComponents.size();
+
+        LSMRTreeCursorInitialState initialState;
+        ITreeIndexAccessor[] bTreeAccessors = null;
+        if (includeMutableComponent) {
+            // Only in-memory BTree
+            bTreeAccessors = new ITreeIndexAccessor[1];
+            bTreeAccessors[0] = ctx.memBTreeAccessor;
+        }
+
+        initialState = new LSMRTreeCursorInitialState(numDiskRComponents, rtreeLeafFrameFactory,
+                rtreeInteriorFrameFactory, btreeLeafFrameFactory, ctx.getBTreeMultiComparator(), null, bTreeAccessors,
+                includeMutableComponent, lsmHarness, comparatorFields, linearizerArray, ctx.searchCallback,
+                operationalComponents);
+
+        lsmTreeCursor.open(initialState, pred);
+
+        ListIterator<ILSMComponent> diskComponentsIter = operationalComponents.listIterator();
+        int diskComponentIx = 0;
+        if (includeMutableComponent) {
+            // Open cursor of in-memory RTree
+            ctx.memRTreeAccessor.search(lsmTreeCursor.getMemRTreeCursor(), pred);
+            diskComponentIx++;
+            diskComponentsIter.next();
+        }
+
+        // Open cursors of on-disk RTrees.
+        ITreeIndexAccessor[] diskRTreeAccessors = new ITreeIndexAccessor[numDiskRComponents];
+        while (diskComponentsIter.hasNext()) {
+            RTree diskRTree = (RTree) ((LSMRTreeImmutableComponent) diskComponentsIter.next()).getRTree();
+            diskRTreeAccessors[diskComponentIx] = diskRTree.createAccessor(NoOpOperationCallback.INSTANCE,
+                    NoOpOperationCallback.INSTANCE);
+            diskRTreeAccessors[diskComponentIx].search(lsmTreeCursor.getCursor(diskComponentIx), pred);
+            diskComponentIx++;
+        }
+        lsmTreeCursor.initPriorityQueue();
+    }
+
+    @Override
+    public boolean scheduleFlush(ILSMIndexOperationContext ctx, ILSMIOOperationCallback callback)
+            throws HyracksDataException {
+        if (!mutableComponent.isModified()) {
+            return false;
+        }
+        LSMRTreeOpContext opCtx = createOpContext(NoOpOperationCallback.INSTANCE);
+        LSMComponentFileReferences relFlushFileRefs = fileManager.getRelFlushFileReference();
+        ILSMComponent flushingComponent = ctx.getComponentHolder().get(0);
+        opCtx.setOperation(IndexOperation.FLUSH);
+        opCtx.getComponentHolder().add(flushingComponent);
+        ILSMIndexAccessorInternal accessor = new LSMRTreeWithAntiMatterTuplesAccessor(lsmHarness, opCtx);
+        ioScheduler.scheduleOperation(new LSMRTreeFlushOperation(accessor, flushingComponent, relFlushFileRefs
+                .getInsertIndexFileReference(), null, null, callback));
+        return true;
+    }
+
+    @Override
+    public ILSMComponent flush(ILSMIOOperation operation) throws HyracksDataException, IndexException {
+        LSMRTreeFlushOperation flushOp = (LSMRTreeFlushOperation) operation;
+        // Renaming order is critical because we use assume ordering when we
+        // read the file names when we open the tree.
+        // The RTree should be renamed before the BTree.
+        LSMRTreeMutableComponent flushingComponent = (LSMRTreeMutableComponent) flushOp.getFlushingComponent();
+        ITreeIndexAccessor memRTreeAccessor = flushingComponent.getRTree().createAccessor(
+                NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        RTreeSearchCursor rtreeScanCursor = (RTreeSearchCursor) memRTreeAccessor.createSearchCursor();
+        SearchPredicate rtreeNullPredicate = new SearchPredicate(null, null);
+        memRTreeAccessor.search(rtreeScanCursor, rtreeNullPredicate);
+        LSMRTreeImmutableComponent component = createDiskComponent(componentFactory, flushOp.getRTreeFlushTarget(),
+                null, null, true);
+        RTree diskRTree = component.getRTree();
+
+        // scan the memory BTree
+        ITreeIndexAccessor memBTreeAccessor = flushingComponent.getBTree().createAccessor(
+                NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        BTreeRangeSearchCursor btreeScanCursor = (BTreeRangeSearchCursor) memBTreeAccessor.createSearchCursor();
+        RangePredicate btreeNullPredicate = new RangePredicate(null, null, true, true, null, null);
+        memBTreeAccessor.search(btreeScanCursor, btreeNullPredicate);
+
+        // Since the LSM-RTree is used as a secondary assumption, the
+        // primary key will be the last comparator in the BTree comparators
+        if (rTreeTupleSorter == null) {
+            rTreeTupleSorter = new TreeTupleSorter(flushingComponent.getRTree().getFileId(), linearizerArray,
+                    rtreeLeafFrameFactory.createFrame(), rtreeLeafFrameFactory.createFrame(), flushingComponent
+                            .getRTree().getBufferCache(), comparatorFields);
+
+            bTreeTupleSorter = new TreeTupleSorter(flushingComponent.getBTree().getFileId(), linearizerArray,
+                    btreeLeafFrameFactory.createFrame(), btreeLeafFrameFactory.createFrame(), flushingComponent
+                            .getBTree().getBufferCache(), comparatorFields);
+        } else {
+            rTreeTupleSorter.reset();
+            bTreeTupleSorter.reset();
+        }
+        // BulkLoad the tuples from the in-memory tree into the new disk
+        // RTree.
+
+        boolean isEmpty = true;
+        try {
+            while (rtreeScanCursor.hasNext()) {
+                isEmpty = false;
+                rtreeScanCursor.next();
+                rTreeTupleSorter.insertTupleEntry(rtreeScanCursor.getPageId(), rtreeScanCursor.getTupleOffset());
+            }
+        } finally {
+            rtreeScanCursor.close();
+        }
+        if (!isEmpty) {
+            rTreeTupleSorter.sort();
+        }
+
+        isEmpty = true;
+        try {
+            while (btreeScanCursor.hasNext()) {
+                isEmpty = false;
+                btreeScanCursor.next();
+                bTreeTupleSorter.insertTupleEntry(btreeScanCursor.getPageId(), btreeScanCursor.getTupleOffset());
+            }
+        } finally {
+            btreeScanCursor.close();
+        }
+        if (!isEmpty) {
+            bTreeTupleSorter.sort();
+        }
+
+        IIndexBulkLoader rTreeBulkloader = diskRTree.createBulkLoader(1.0f, false, 0L);
+        LSMRTreeWithAntiMatterTuplesFlushCursor cursor = new LSMRTreeWithAntiMatterTuplesFlushCursor(rTreeTupleSorter,
+                bTreeTupleSorter, comparatorFields, linearizerArray);
+        cursor.open(null, null);
+
+        try {
+            while (cursor.hasNext()) {
+                cursor.next();
+                ITupleReference frameTuple = cursor.getTuple();
+
+                rTreeBulkloader.add(frameTuple);
+            }
+        } finally {
+            cursor.close();
+        }
+
+        rTreeBulkloader.end();
+        return component;
+    }
+
+    @Override
+    public void scheduleMerge(ILSMIndexOperationContext ctx, ILSMIOOperationCallback callback)
+            throws HyracksDataException, IndexException {
+        List<ILSMComponent> mergingComponents = ctx.getComponentHolder();
+        LSMRTreeOpContext rctx = createOpContext(NoOpOperationCallback.INSTANCE);
+        rctx.getComponentHolder().addAll(mergingComponents);
+        ITreeIndexCursor cursor = new LSMRTreeWithAntiMatterTuplesSearchCursor(ctx);
+        ISearchPredicate rtreeSearchPred = new SearchPredicate(null, null);
+        search(rctx, cursor, (SearchPredicate) rtreeSearchPred);
+        rctx.setOperation(IndexOperation.MERGE);
+        LSMComponentFileReferences relMergeFileRefs = getMergeTargetFileName(mergingComponents);
+        ILSMIndexAccessorInternal accessor = new LSMRTreeWithAntiMatterTuplesAccessor(lsmHarness, rctx);
+        ioScheduler.scheduleOperation(new LSMRTreeMergeOperation(accessor, mergingComponents, cursor, relMergeFileRefs
+                .getInsertIndexFileReference(), null, null, callback));
+    }
+
+    @Override
+    public ILSMComponent merge(List<ILSMComponent> mergedComponents, ILSMIOOperation operation)
+            throws HyracksDataException, IndexException {
+        LSMRTreeMergeOperation mergeOp = (LSMRTreeMergeOperation) operation;
+        ITreeIndexCursor cursor = mergeOp.getCursor();
+        mergedComponents.addAll(mergeOp.getMergingComponents());
+
+        // Nothing to merge.
+        if (mergedComponents.size() <= 1) {
+            cursor.close();
+            return null;
+        }
+
+        // Bulk load the tuples from all on-disk RTrees into the new RTree.
+        LSMRTreeImmutableComponent component = createDiskComponent(componentFactory, mergeOp.getRTreeMergeTarget(),
+                null, null, true);
+        RTree mergedRTree = component.getRTree();
+        IIndexBulkLoader bulkloader = mergedRTree.createBulkLoader(1.0f, false, 0L);
+        try {
+            while (cursor.hasNext()) {
+                cursor.next();
+                ITupleReference frameTuple = cursor.getTuple();
+                bulkloader.add(frameTuple);
+            }
+        } finally {
+            cursor.close();
+        }
+        bulkloader.end();
+        return component;
+    }
+
+    @Override
+    public ILSMIndexAccessorInternal createAccessor(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback) {
+        return new LSMRTreeWithAntiMatterTuplesAccessor(lsmHarness, createOpContext(modificationCallback));
+    }
+
+    public class LSMRTreeWithAntiMatterTuplesAccessor extends LSMTreeIndexAccessor {
+        public LSMRTreeWithAntiMatterTuplesAccessor(ILSMHarness lsmHarness, ILSMIndexOperationContext ctx) {
+            super(lsmHarness, ctx);
+        }
+
+        @Override
+        public ITreeIndexCursor createSearchCursor() {
+            return new LSMRTreeWithAntiMatterTuplesSearchCursor(ctx);
+        }
+
+        public MultiComparator getMultiComparator() {
+            LSMRTreeOpContext concreteCtx = (LSMRTreeOpContext) ctx;
+            return concreteCtx.rtreeOpContext.cmp;
+        }
+    }
+
+    @Override
+    public IIndexBulkLoader createBulkLoader(float fillLevel, boolean verifyInput, long numElementsHint)
+            throws TreeIndexException {
+        return new LSMRTreeWithAntiMatterTuplesBulkLoader(fillLevel, verifyInput, numElementsHint);
+    }
+
+    private ILSMComponent createBulkLoadTarget() throws HyracksDataException, IndexException {
+        LSMComponentFileReferences relFlushFileRefs = fileManager.getRelFlushFileReference();
+        return createDiskComponent(bulkLoaComponentFactory, relFlushFileRefs.getInsertIndexFileReference(), null, null,
+                true);
+    }
+
+    public class LSMRTreeWithAntiMatterTuplesBulkLoader implements IIndexBulkLoader {
+        private final ILSMComponent component;
+        private final IIndexBulkLoader bulkLoader;
+
+        public LSMRTreeWithAntiMatterTuplesBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
+                throws TreeIndexException {
+            // Note that by using a flush target file name, we state that the
+            // new bulk loaded tree is "newer" than any other merged tree.
+            try {
+                component = createBulkLoadTarget();
+            } catch (HyracksDataException e) {
+                throw new TreeIndexException(e);
+            } catch (IndexException e) {
+                throw new TreeIndexException(e);
+            }
+            bulkLoader = ((LSMRTreeImmutableComponent) component).getRTree().createBulkLoader(fillFactor, verifyInput,
+                    numElementsHint);
+        }
+
+        @Override
+        public void add(ITupleReference tuple) throws HyracksDataException, IndexException {
+            try {
+                bulkLoader.add(tuple);
+            } catch (IndexException e) {
+                handleException();
+                throw e;
+            } catch (HyracksDataException e) {
+                handleException();
+                throw e;
+            } catch (RuntimeException e) {
+                handleException();
+                throw e;
+            }
+        }
+
+        @Override
+        public void end() throws HyracksDataException, IndexException {
+            bulkLoader.end();
+            lsmHarness.addBulkLoadedComponent(component);
+        }
+
+        protected void handleException() throws HyracksDataException {
+            ((LSMRTreeImmutableComponent) component).getRTree().deactivate();
+            ((LSMRTreeImmutableComponent) component).getRTree().destroy();
+        }
+
+    }
+
+    @Override
+    public void markAsValid(ILSMComponent lsmComponent) throws HyracksDataException {
+        RTree rtree = ((LSMRTreeImmutableComponent) lsmComponent).getRTree();
+        forceFlushDirtyPages(rtree);
+        markAsValidInternal(rtree);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuplesComponentFactory.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuplesComponentFactory.java
new file mode 100644
index 0000000..0149800
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuplesComponentFactory.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponent;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMComponentFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+
+public class LSMRTreeWithAntiMatterTuplesComponentFactory implements ILSMComponentFactory {
+    private final TreeIndexFactory<RTree> rtreeFactory;
+
+    public LSMRTreeWithAntiMatterTuplesComponentFactory(TreeIndexFactory<RTree> rtreeFactory) {
+        this.rtreeFactory = rtreeFactory;
+    }
+
+    @Override
+    public ILSMComponent createLSMComponentInstance(LSMComponentFileReferences cfr) throws IndexException {
+        return new LSMRTreeImmutableComponent(rtreeFactory.createIndexInstance(cfr.getInsertIndexFileReference()),
+                null, null);
+    }
+
+    @Override
+    public IBufferCache getBufferCache() {
+        return rtreeFactory.getBufferCache();
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuplesFileManager.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuplesFileManager.java
new file mode 100644
index 0000000..6ddf766
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuplesFileManager.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractLSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class LSMRTreeWithAntiMatterTuplesFileManager extends AbstractLSMIndexFileManager {
+
+    public LSMRTreeWithAntiMatterTuplesFileManager(IIOManager ioManager, IFileMapProvider fileMapProvider,
+            FileReference file, TreeIndexFactory<? extends ITreeIndex> rtreeFactory, int startIODeviceIndex) {
+        super(ioManager, fileMapProvider, file, rtreeFactory, startIODeviceIndex);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuplesFlushCursor.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuplesFlushCursor.java
new file mode 100644
index 0000000..22e6929
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuplesFlushCursor.java
@@ -0,0 +1,164 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+
+public class LSMRTreeWithAntiMatterTuplesFlushCursor implements ITreeIndexCursor {
+    private final TreeTupleSorter rTreeTupleSorter;
+    private final TreeTupleSorter bTreeTupleSorter;
+    private final int[] comparatorFields;
+    private final MultiComparator cmp;
+    private ITupleReference frameTuple;
+    private ITupleReference leftOverTuple;
+    private ITupleReference rtreeTuple;
+    private ITupleReference btreeTuple;
+    private boolean foundNext = false;
+
+    public LSMRTreeWithAntiMatterTuplesFlushCursor(TreeTupleSorter rTreeTupleSorter, TreeTupleSorter bTreeTupleSorter,
+            int[] comparatorFields, IBinaryComparatorFactory[] comparatorFactories) {
+        this.rTreeTupleSorter = rTreeTupleSorter;
+        this.bTreeTupleSorter = bTreeTupleSorter;
+        this.comparatorFields = comparatorFields;
+        cmp = MultiComparator.create(comparatorFactories);
+    }
+
+    @Override
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws HyracksDataException {
+
+    }
+
+    @Override
+    public boolean hasNext() throws HyracksDataException {
+        if (foundNext) {
+            return true;
+        }
+        while (true) {
+            if (leftOverTuple != null && leftOverTuple == rtreeTuple) {
+                if (bTreeTupleSorter.hasNext()) {
+                    bTreeTupleSorter.next();
+                    btreeTuple = bTreeTupleSorter.getTuple();
+                } else {
+                    frameTuple = rtreeTuple;
+                    foundNext = true;
+                    leftOverTuple = null;
+                    return true;
+                }
+            } else if (leftOverTuple != null && leftOverTuple == btreeTuple) {
+                if (rTreeTupleSorter.hasNext()) {
+                    rTreeTupleSorter.next();
+                    rtreeTuple = rTreeTupleSorter.getTuple();
+                } else {
+                    frameTuple = btreeTuple;
+                    foundNext = true;
+                    leftOverTuple = null;
+                    return true;
+                }
+            } else {
+                if (rTreeTupleSorter.hasNext() && bTreeTupleSorter.hasNext()) {
+                    rTreeTupleSorter.next();
+                    bTreeTupleSorter.next();
+                    rtreeTuple = rTreeTupleSorter.getTuple();
+                    btreeTuple = bTreeTupleSorter.getTuple();
+                } else if (rTreeTupleSorter.hasNext()) {
+                    rTreeTupleSorter.next();
+                    rtreeTuple = rTreeTupleSorter.getTuple();
+                    frameTuple = rtreeTuple;
+                    leftOverTuple = null;
+                    foundNext = true;
+                    return true;
+                } else if (bTreeTupleSorter.hasNext()) {
+                    bTreeTupleSorter.next();
+                    btreeTuple = bTreeTupleSorter.getTuple();
+                    frameTuple = btreeTuple;
+                    leftOverTuple = null;
+                    foundNext = true;
+                    return true;
+                } else {
+                    return false;
+                }
+            }
+
+            int c = cmp.selectiveFieldCompare(rtreeTuple, btreeTuple, comparatorFields);
+            if (c == 0) {
+                leftOverTuple = null;
+                continue;
+            } else if (c < 0) {
+                frameTuple = rtreeTuple;
+                leftOverTuple = btreeTuple;
+                foundNext = true;
+                return true;
+            } else {
+                frameTuple = btreeTuple;
+                leftOverTuple = rtreeTuple;
+                foundNext = true;
+                return true;
+            }
+        }
+    }
+
+    @Override
+    public void next() throws HyracksDataException {
+        foundNext = false;
+
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+    }
+
+    @Override
+    public void reset() throws HyracksDataException {
+
+    }
+
+    @Override
+    public ITupleReference getTuple() {
+        return frameTuple;
+    }
+
+    @Override
+    public ICachedPage getPage() {
+        return null;
+    }
+
+    @Override
+    public void setBufferCache(IBufferCache bufferCache) {
+        // TODO Auto-generated method stub
+
+    }
+
+    @Override
+    public void setFileId(int fileId) {
+        // TODO Auto-generated method stub
+
+    }
+
+    @Override
+    public boolean exclusiveLatchNodes() {
+        // TODO Auto-generated method stub
+        return false;
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuplesSearchCursor.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuplesSearchCursor.java
new file mode 100644
index 0000000..47d00c0
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuplesSearchCursor.java
@@ -0,0 +1,249 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeRangeSearchCursor;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMIndexSearchCursor;
+import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeInteriorFrame;
+import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTreeSearchCursor;
+
+public class LSMRTreeWithAntiMatterTuplesSearchCursor extends LSMIndexSearchCursor {
+
+    private RTreeSearchCursor memRTreeCursor;
+    private BTreeRangeSearchCursor memBTreeCursor;
+    private RangePredicate btreeRangePredicate;
+    private ITreeIndexAccessor memBTreeAccessor;
+    private boolean foundNext;
+    private ITupleReference frameTuple;
+    private int[] comparatorFields;
+    private MultiComparator btreeCmp;
+
+    public LSMRTreeWithAntiMatterTuplesSearchCursor(ILSMIndexOperationContext opCtx) {
+        super(opCtx);
+    }
+
+    @Override
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws HyracksDataException {
+        LSMRTreeCursorInitialState lsmInitialState = (LSMRTreeCursorInitialState) initialState;
+        cmp = lsmInitialState.getHilbertCmp();
+        btreeCmp = lsmInitialState.getBTreeCmp();
+        int numDiskRTrees = lsmInitialState.getNumberOfTrees();
+        rangeCursors = new RTreeSearchCursor[numDiskRTrees];
+        for (int i = 0; i < numDiskRTrees; i++) {
+            rangeCursors[i] = new RTreeSearchCursor((IRTreeInteriorFrame) lsmInitialState
+                    .getRTreeInteriorFrameFactory().createFrame(), (IRTreeLeafFrame) lsmInitialState
+                    .getRTreeLeafFrameFactory().createFrame());
+        }
+        includeMemComponent = lsmInitialState.getIncludeMemComponent();
+        operationalComponents = lsmInitialState.getOperationalComponents();
+        if (includeMemComponent) {
+            memRTreeCursor = new RTreeSearchCursor((IRTreeInteriorFrame) lsmInitialState.getRTreeInteriorFrameFactory()
+                    .createFrame(), (IRTreeLeafFrame) lsmInitialState.getRTreeLeafFrameFactory().createFrame());
+            memBTreeCursor = new BTreeRangeSearchCursor((IBTreeLeafFrame) lsmInitialState.getBTreeLeafFrameFactory()
+                    .createFrame(), false);
+            memBTreeAccessor = lsmInitialState.getBTreeAccessors()[0];
+            btreeRangePredicate = new RangePredicate(null, null, true, true, btreeCmp, btreeCmp);
+        }
+        lsmHarness = lsmInitialState.getLSMHarness();
+        comparatorFields = lsmInitialState.getComparatorFields();
+        setPriorityQueueComparator();
+    }
+
+    @Override
+    public boolean hasNext() throws HyracksDataException, IndexException {
+        if (includeMemComponent) {
+            if (foundNext) {
+                return true;
+            }
+            while (memRTreeCursor.hasNext()) {
+                memRTreeCursor.next();
+                ITupleReference memRTreeTuple = memRTreeCursor.getTuple();
+                if (searchMemBTree(memRTreeTuple)) {
+                    foundNext = true;
+                    frameTuple = memRTreeTuple;
+                    return true;
+                }
+            }
+            while (super.hasNext()) {
+                super.next();
+                ITupleReference diskRTreeTuple = super.getTuple();
+                if (searchMemBTree(diskRTreeTuple)) {
+                    foundNext = true;
+                    frameTuple = diskRTreeTuple;
+                    return true;
+                }
+            }
+        } else {
+            return super.hasNext();
+        }
+
+        return false;
+    }
+
+    @Override
+    public void next() throws HyracksDataException {
+        if (includeMemComponent) {
+            foundNext = false;
+        } else {
+            super.next();
+        }
+
+    }
+
+    @Override
+    public ITupleReference getTuple() {
+        if (includeMemComponent) {
+            return frameTuple;
+        } else {
+            return super.getTuple();
+        }
+
+    }
+
+    @Override
+    public void reset() throws HyracksDataException, IndexException {
+        if (includeMemComponent) {
+            memRTreeCursor.reset();
+            memBTreeCursor.reset();
+        }
+        super.reset();
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        if (includeMemComponent) {
+            memRTreeCursor.close();
+            memBTreeCursor.close();
+        }
+        super.close();
+    }
+
+    public ITreeIndexCursor getMemRTreeCursor() {
+        return memRTreeCursor;
+    }
+
+    @Override
+    protected int compare(MultiComparator cmp, ITupleReference tupleA, ITupleReference tupleB) {
+        return cmp.selectiveFieldCompare(tupleA, tupleB, comparatorFields);
+    }
+
+    private boolean searchMemBTree(ITupleReference tuple) throws HyracksDataException {
+        try {
+            btreeRangePredicate.setHighKey(tuple, true);
+            btreeRangePredicate.setLowKey(tuple, true);
+            memBTreeAccessor.search(memBTreeCursor, btreeRangePredicate);
+        } catch (IndexException e) {
+            throw new HyracksDataException(e);
+        }
+        try {
+            if (memBTreeCursor.hasNext()) {
+                return false;
+            } else {
+                return true;
+            }
+        } finally {
+            memBTreeCursor.close();
+        }
+    }
+
+    @Override
+    protected void setPriorityQueueComparator() {
+        if (pqCmp == null || cmp != pqCmp.getMultiComparator()) {
+            pqCmp = new PriorityQueueHilbertComparator(cmp, comparatorFields);
+        }
+    }
+
+    public class PriorityQueueHilbertComparator extends PriorityQueueComparator {
+
+        private final int[] comparatorFields;
+
+        public PriorityQueueHilbertComparator(MultiComparator cmp, int[] comparatorFields) {
+            super(cmp);
+            this.comparatorFields = comparatorFields;
+        }
+
+        @Override
+        public int compare(PriorityQueueElement elementA, PriorityQueueElement elementB) {
+            int result = cmp.selectiveFieldCompare(elementA.getTuple(), elementB.getTuple(), comparatorFields);
+            if (result != 0) {
+                return result;
+            }
+            if (elementA.getCursorIndex() > elementB.getCursorIndex()) {
+                return 1;
+            } else {
+                return -1;
+            }
+        }
+    }
+
+    @Override
+    protected void checkPriorityQueue() throws HyracksDataException, IndexException {
+        while (!outputPriorityQueue.isEmpty() || needPush == true) {
+            if (!outputPriorityQueue.isEmpty()) {
+                PriorityQueueElement checkElement = outputPriorityQueue.peek();
+                // If there is no previous tuple or the previous tuple can be ignored
+                if (outputElement == null) {
+                    if (isDeleted(checkElement)) {
+                        // If the key has been deleted then pop it and set needPush to true.
+                        // We cannot push immediately because the tuple may be
+                        // modified if hasNext() is called
+                        outputElement = outputPriorityQueue.poll();
+                        needPush = true;
+                    } else {
+                        break;
+                    }
+                } else {
+                    // Compare the previous tuple and the head tuple in the PQ
+                    if (compare(cmp, outputElement.getTuple(), checkElement.getTuple()) == 0) {
+                        // If the previous tuple and the head tuple are
+                        // identical
+                        // then pop the head tuple and push the next tuple from
+                        // the tree of head tuple
+
+                        // the head element of PQ is useless now
+                        PriorityQueueElement e = outputPriorityQueue.poll();
+                        pushIntoPriorityQueue(e);
+                    } else {
+                        // If the previous tuple and the head tuple are different
+                        // the info of previous tuple is useless
+                        if (needPush == true) {
+                            pushIntoPriorityQueue(outputElement);
+                            needPush = false;
+                        }
+                        outputElement = null;
+                    }
+                }
+            } else {
+                // the priority queue is empty and needPush
+                pushIntoPriorityQueue(outputElement);
+                needPush = false;
+                outputElement = null;
+            }
+        }
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/RTreeFactory.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/RTreeFactory.java
new file mode 100644
index 0000000..71e228b
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/RTreeFactory.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManagerFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class RTreeFactory extends TreeIndexFactory<RTree> {
+
+    public RTreeFactory(IBufferCache bufferCache, IFileMapProvider fileMapProvider,
+            IFreePageManagerFactory freePageManagerFactory, ITreeIndexFrameFactory interiorFrameFactory,
+            ITreeIndexFrameFactory leafFrameFactory, IBinaryComparatorFactory[] cmpFactories, int fieldCount) {
+        super(bufferCache, fileMapProvider, freePageManagerFactory, interiorFrameFactory, leafFrameFactory,
+                cmpFactories, fieldCount);
+    }
+
+    @Override
+    public RTree createIndexInstance(FileReference file) throws IndexException {
+        return new RTree(bufferCache, fileMapProvider, freePageManagerFactory.createFreePageManager(),
+                interiorFrameFactory, leafFrameFactory, cmpFactories, fieldCount, file);
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/TreeTupleSorter.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/TreeTupleSorter.java
new file mode 100644
index 0000000..294c2b8
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/TreeTupleSorter.java
@@ -0,0 +1,225 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.impls;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+
+public class TreeTupleSorter implements ITreeIndexCursor {
+    private final static int INITIAL_SIZE = 1000000;
+    private int numTuples;
+    private int currentTupleIndex;
+    private int[] tPointers;
+    private IBufferCache bufferCache;
+    private final ITreeIndexFrame leafFrame1;
+    private final ITreeIndexFrame leafFrame2;
+    private ITreeIndexTupleReference frameTuple1;
+    private ITreeIndexTupleReference frameTuple2;
+    private final int fileId;
+    private final static int ARRAY_GROWTH = 1000000; // Must be at least of size 2
+    private final int[] comparatorFields;
+    private final MultiComparator cmp;
+
+    public TreeTupleSorter(int fileId, IBinaryComparatorFactory[] comparatorFactories, ITreeIndexFrame leafFrame1,
+            ITreeIndexFrame leafFrame2, IBufferCache bufferCache, int[] comparatorFields) {
+        this.fileId = fileId;
+        this.leafFrame1 = leafFrame1;
+        this.leafFrame2 = leafFrame2;
+        this.bufferCache = bufferCache;
+        this.comparatorFields = comparatorFields;
+        tPointers = new int[INITIAL_SIZE * 2];
+        frameTuple1 = leafFrame1.createTupleReference();
+        frameTuple2 = leafFrame2.createTupleReference();
+        currentTupleIndex = 0;
+        cmp = MultiComparator.create(comparatorFactories);
+    }
+
+    public void reset() {
+        numTuples = 0;
+        currentTupleIndex = 0;
+    }
+
+    public boolean hasNext() throws HyracksDataException {
+        if (numTuples <= currentTupleIndex) {
+            return false;
+        }
+        // We don't latch pages since this code is only used by flush () before
+        // bulk-loading the r-tree to disk and flush is not concurrent.
+        //
+        ICachedPage node1 = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, tPointers[currentTupleIndex * 2]),
+                false);
+        try {
+            leafFrame1.setPage(node1);
+            frameTuple1.resetByTupleOffset(leafFrame1.getBuffer(), tPointers[currentTupleIndex * 2 + 1]);
+        } finally {
+            bufferCache.unpin(node1);
+        }
+        return true;
+    }
+
+    public void next() {
+        currentTupleIndex++;
+    }
+
+    public ITupleReference getTuple() {
+        return frameTuple1;
+    }
+
+    public void insertTupleEntry(int pageId, int tupleOffset) {
+        if (numTuples * 2 == tPointers.length) {
+            int[] newData = new int[tPointers.length + ARRAY_GROWTH];
+            System.arraycopy(tPointers, 0, newData, 0, tPointers.length);
+            tPointers = newData;
+        }
+
+        tPointers[numTuples * 2] = pageId;
+        tPointers[numTuples * 2 + 1] = tupleOffset;
+        numTuples++;
+    }
+
+    public void sort() throws HyracksDataException {
+        sort(tPointers, 0, numTuples);
+    }
+
+    private void sort(int[] tPointers, int offset, int length) throws HyracksDataException {
+        int m = offset + (length >> 1);
+        int mi = tPointers[m * 2];
+        int mj = tPointers[m * 2 + 1];
+
+        int a = offset;
+        int b = a;
+        int c = offset + length - 1;
+        int d = c;
+        while (true) {
+            while (b <= c) {
+                int cmp = compare(tPointers, b, mi, mj);
+                if (cmp > 0) {
+                    break;
+                }
+                if (cmp == 0) {
+                    swap(tPointers, a++, b);
+                }
+                ++b;
+            }
+            while (c >= b) {
+                int cmp = compare(tPointers, c, mi, mj);
+                if (cmp < 0) {
+                    break;
+                }
+                if (cmp == 0) {
+                    swap(tPointers, c, d--);
+                }
+                --c;
+            }
+            if (b > c)
+                break;
+            swap(tPointers, b++, c--);
+        }
+
+        int s;
+        int n = offset + length;
+        s = Math.min(a - offset, b - a);
+        vecswap(tPointers, offset, b - s, s);
+        s = Math.min(d - c, n - d - 1);
+        vecswap(tPointers, b, n - s, s);
+
+        if ((s = b - a) > 1) {
+            sort(tPointers, offset, s);
+        }
+        if ((s = d - c) > 1) {
+            sort(tPointers, n - s, s);
+        }
+    }
+
+    private void swap(int x[], int a, int b) {
+        for (int i = 0; i < 2; ++i) {
+            int t = x[a * 2 + i];
+            x[a * 2 + i] = x[b * 2 + i];
+            x[b * 2 + i] = t;
+        }
+    }
+
+    private void vecswap(int x[], int a, int b, int n) {
+        for (int i = 0; i < n; i++, a++, b++) {
+            swap(x, a, b);
+        }
+    }
+
+    private int compare(int[] tPointers, int tp1, int tp2i, int tp2j) throws HyracksDataException {
+        int i1 = tPointers[tp1 * 2];
+        int j1 = tPointers[tp1 * 2 + 1];
+
+        int i2 = tp2i;
+        int j2 = tp2j;
+
+        ICachedPage node1 = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, i1), false);
+        leafFrame1.setPage(node1);
+        ICachedPage node2 = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, i2), false);
+        leafFrame2.setPage(node2);
+
+        try {
+            frameTuple1.resetByTupleOffset(leafFrame1.getBuffer(), j1);
+            frameTuple2.resetByTupleOffset(leafFrame2.getBuffer(), j2);
+
+            return cmp.selectiveFieldCompare(frameTuple1, frameTuple2, comparatorFields);
+
+        } finally {
+            bufferCache.unpin(node1);
+            bufferCache.unpin(node2);
+        }
+    }
+
+    @Override
+    public void open(ICursorInitialState initialState, ISearchPredicate searchPred) throws HyracksDataException {
+        // do nothing
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        // do nothing
+    }
+
+    @Override
+    public ICachedPage getPage() {
+        return null;
+    }
+
+    @Override
+    public void setBufferCache(IBufferCache bufferCache) {
+        // do nothing
+    }
+
+    @Override
+    public void setFileId(int fileId) {
+        // do nothing
+    }
+
+    @Override
+    public boolean exclusiveLatchNodes() {
+        return false;
+    }
+
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeCopyTupleWriter.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeCopyTupleWriter.java
new file mode 100644
index 0000000..1852b51
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeCopyTupleWriter.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.tuples;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+
+public class LSMRTreeCopyTupleWriter extends LSMRTreeTupleWriter {
+    public LSMRTreeCopyTupleWriter(ITypeTraits[] typeTraits) {
+        // Third parameter is never used locally, just give false.
+        super(typeTraits, false);
+    }
+
+    @Override
+    public int writeTuple(ITupleReference tuple, byte[] targetBuf, int targetOff) {
+        int tupleSize = bytesRequired(tuple);
+        byte[] buf = tuple.getFieldData(0);
+        int tupleStartOff = ((LSMRTreeTupleReference) tuple).getTupleStart();
+        System.arraycopy(buf, tupleStartOff, targetBuf, targetOff, tupleSize);
+        return tupleSize;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeCopyTupleWriterFactory.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeCopyTupleWriterFactory.java
new file mode 100644
index 0000000..39a8e4d
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeCopyTupleWriterFactory.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.tuples;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleWriter;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
+
+public class LSMRTreeCopyTupleWriterFactory extends TypeAwareTupleWriterFactory {
+    private static final long serialVersionUID = 1L;
+    private final ITypeTraits[] typeTraits;
+
+    public LSMRTreeCopyTupleWriterFactory(ITypeTraits[] typeTraits) {
+        super(typeTraits);
+        this.typeTraits = typeTraits;
+    }
+
+    @Override
+    public ITreeIndexTupleWriter createTupleWriter() {
+        return new LSMRTreeCopyTupleWriter(typeTraits);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeTupleReference.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeTupleReference.java
new file mode 100644
index 0000000..70072e1
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeTupleReference.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.tuples;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMTreeTupleReference;
+
+public class LSMRTreeTupleReference extends TypeAwareTupleReference implements ILSMTreeTupleReference {
+
+    public LSMRTreeTupleReference(ITypeTraits[] typeTraits) {
+        super(typeTraits);
+    }
+
+    @Override
+    protected int getNullFlagsBytes() {
+        // +1.0 is for matter/antimatter bit.
+        return (int) Math.ceil((fieldCount + 1.0) / 8.0);
+    }
+
+    @Override
+    public boolean isAntimatter() {
+        // Check if the leftmost bit is 0 or 1.
+        final byte mask = (byte) (1 << 7);
+        if ((buf.array()[tupleStartOff] & mask) != 0) {
+            return true;
+        }
+        return false;
+    }
+
+    public int getTupleStart() {
+        return tupleStartOff;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeTupleWriter.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeTupleWriter.java
new file mode 100644
index 0000000..932a307
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeTupleWriter.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.tuples;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
+import edu.uci.ics.hyracks.storage.am.rtree.tuples.RTreeTypeAwareTupleWriter;
+
+public class LSMRTreeTupleWriter extends RTreeTypeAwareTupleWriter {
+    private final boolean isAntimatter;
+
+    public LSMRTreeTupleWriter(ITypeTraits[] typeTraits, boolean isAntimatter) {
+        super(typeTraits);
+        this.isAntimatter = isAntimatter;
+    }
+
+    @Override
+    public ITreeIndexTupleReference createTupleReference() {
+        return new LSMRTreeTupleReference(typeTraits);
+    }
+
+    @Override
+    public int bytesRequired(ITupleReference tuple) {
+        return super.bytesRequired(tuple);
+    }
+
+    @Override
+    public int writeTuple(ITupleReference tuple, byte[] targetBuf, int targetOff) {
+        int bytesWritten = super.writeTuple(tuple, targetBuf, targetOff);
+        if (isAntimatter) {
+            setAntimatterBit(targetBuf, targetOff);
+        }
+        return bytesWritten;
+    }
+
+    @Override
+    protected int getNullFlagsBytes(int numFields) {
+        // +1.0 is for matter/antimatter bit.
+        return (int) Math.ceil(((double) numFields + 1.0) / 8.0);
+    }
+
+    @Override
+    protected int getNullFlagsBytes(ITupleReference tuple) {
+        // +1.0 is for matter/antimatter bit.
+        return (int) Math.ceil(((double) tuple.getFieldCount() + 1.0) / 8.0);
+    }
+
+    protected void setAntimatterBit(byte[] targetBuf, int targetOff) {
+        // Set leftmost bit to 1.
+        targetBuf[targetOff] = (byte) (targetBuf[targetOff] | (1 << 7));
+    }
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeTupleWriterFactory.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeTupleWriterFactory.java
new file mode 100644
index 0000000..493d368
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMRTreeTupleWriterFactory.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.tuples;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleWriter;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
+
+public class LSMRTreeTupleWriterFactory extends TypeAwareTupleWriterFactory {
+
+    private static final long serialVersionUID = 1L;
+    private final ITypeTraits[] typeTraits;
+    private final boolean isDelete;
+
+    public LSMRTreeTupleWriterFactory(ITypeTraits[] typeTraits, boolean isDelete) {
+        super(typeTraits);
+        this.typeTraits = typeTraits;
+        this.isDelete = isDelete;
+    }
+
+    @Override
+    public ITreeIndexTupleWriter createTupleWriter() {
+        return new LSMRTreeTupleWriter(typeTraits, isDelete);
+    }
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMTypeAwareTupleWriterFactory.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMTypeAwareTupleWriterFactory.java
new file mode 100644
index 0000000..876df56
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/tuples/LSMTypeAwareTupleWriterFactory.java
@@ -0,0 +1,30 @@
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.tuples;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleWriter;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriter;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.tuples.RTreeTypeAwareTupleWriter;
+
+public class LSMTypeAwareTupleWriterFactory extends TypeAwareTupleWriterFactory {
+
+	private static final long serialVersionUID = 1L;
+	private ITypeTraits[] typeTraits;
+	private final boolean isDelete;
+	
+	public LSMTypeAwareTupleWriterFactory(ITypeTraits[] typeTraits, boolean isDelete) {
+		super(typeTraits);
+		this.typeTraits = typeTraits;
+		this.isDelete = isDelete;
+	}
+
+	@Override
+	public ITreeIndexTupleWriter createTupleWriter() {
+	    if (isDelete) {
+	        return new TypeAwareTupleWriter(typeTraits);
+	    } else {
+	        return new RTreeTypeAwareTupleWriter(typeTraits);
+	    }
+	}
+
+}
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/utils/LSMRTreeUtils.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/utils/LSMRTreeUtils.java
new file mode 100644
index 0000000..6c9fce6
--- /dev/null
+++ b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/utils/LSMRTreeUtils.java
@@ -0,0 +1,211 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.utils;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.data.std.primitive.DoublePointable;
+import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilterFactory;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMInteriorFrameFactory;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMLeafFrameFactory;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.freepage.LinkedListFreePageManagerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BTreeFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.impls.LSMRTree;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.impls.LSMRTreeFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.impls.LSMRTreeWithAntiMatterTuples;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.impls.LSMRTreeWithAntiMatterTuplesFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.impls.RTreeFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.tuples.LSMRTreeCopyTupleWriterFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.tuples.LSMRTreeTupleWriterFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.tuples.LSMTypeAwareTupleWriterFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreeNSMInteriorFrameFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreeNSMLeafFrameFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
+import edu.uci.ics.hyracks.storage.am.rtree.linearize.HilbertDoubleComparatorFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.linearize.ZCurveDoubleComparatorFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.linearize.ZCurveIntComparatorFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class LSMRTreeUtils {
+    public static LSMRTree createLSMTree(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IIOManager ioManager, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            ILinearizeComparatorFactory linearizeCmpFactory) throws TreeIndexException {
+        return createLSMTree(memBufferCache, memFreePageManager, ioManager, file, diskBufferCache, diskFileMapProvider,
+                typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories, rtreePolicyType, mergePolicy,
+                opTrackerFactory, ioScheduler, ioOpCallbackProvider, linearizeCmpFactory, 0);
+    }
+
+    public static LSMRTree createLSMTree(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IIOManager ioManager, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            ILinearizeComparatorFactory linearizeCmpFactory, int startIODeviceIndex) throws TreeIndexException {
+        LSMTypeAwareTupleWriterFactory rtreeTupleWriterFactory = new LSMTypeAwareTupleWriterFactory(typeTraits, false);
+        LSMTypeAwareTupleWriterFactory btreeTupleWriterFactory = new LSMTypeAwareTupleWriterFactory(typeTraits, true);
+
+        ITreeIndexFrameFactory rtreeInteriorFrameFactory = new RTreeNSMInteriorFrameFactory(rtreeTupleWriterFactory,
+                valueProviderFactories, rtreePolicyType);
+        ITreeIndexFrameFactory rtreeLeafFrameFactory = new RTreeNSMLeafFrameFactory(rtreeTupleWriterFactory,
+                valueProviderFactories, rtreePolicyType);
+
+        ITreeIndexFrameFactory btreeInteriorFrameFactory = new BTreeNSMInteriorFrameFactory(btreeTupleWriterFactory);
+        ITreeIndexFrameFactory btreeLeafFrameFactory = new BTreeNSMLeafFrameFactory(btreeTupleWriterFactory);
+
+        ITreeIndexMetaDataFrameFactory metaFrameFactory = new LIFOMetaDataFrameFactory();
+        LinkedListFreePageManagerFactory freePageManagerFactory = new LinkedListFreePageManagerFactory(diskBufferCache,
+                metaFrameFactory);
+
+        TreeIndexFactory<RTree> diskRTreeFactory = new RTreeFactory(diskBufferCache, diskFileMapProvider,
+                freePageManagerFactory, rtreeInteriorFrameFactory, rtreeLeafFrameFactory, rtreeCmpFactories,
+                typeTraits.length);
+        TreeIndexFactory<BTree> diskBTreeFactory = new BTreeFactory(diskBufferCache, diskFileMapProvider,
+                freePageManagerFactory, btreeInteriorFrameFactory, btreeLeafFrameFactory, btreeCmpFactories,
+                typeTraits.length);
+
+        int[] comparatorFields = { 0 };
+        IBinaryComparatorFactory[] linearizerArray = { linearizeCmpFactory };
+
+        int[] bloomFilterKeyFields = new int[btreeCmpFactories.length];
+        for (int i = 0; i < btreeCmpFactories.length; i++) {
+            bloomFilterKeyFields[i] = i;
+        }
+        BloomFilterFactory bloomFilterFactory = new BloomFilterFactory(diskBufferCache, diskFileMapProvider,
+                bloomFilterKeyFields);
+
+        ILSMIndexFileManager fileNameManager = new LSMRTreeFileManager(ioManager, diskFileMapProvider, file,
+                diskRTreeFactory, diskBTreeFactory, startIODeviceIndex);
+        LSMRTree lsmTree = new LSMRTree(memBufferCache, memFreePageManager, rtreeInteriorFrameFactory,
+                rtreeLeafFrameFactory, btreeInteriorFrameFactory, btreeLeafFrameFactory, fileNameManager,
+                diskRTreeFactory, diskBTreeFactory, bloomFilterFactory, diskFileMapProvider, typeTraits.length,
+                rtreeCmpFactories, btreeCmpFactories, linearizeCmpFactory, comparatorFields, linearizerArray,
+                mergePolicy, opTrackerFactory, ioScheduler, ioOpCallbackProvider);
+        return lsmTree;
+    }
+
+    public static LSMRTreeWithAntiMatterTuples createLSMTreeWithAntiMatterTuples(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IIOManager ioManager, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            ILinearizeComparatorFactory linearizerCmpFactory) throws TreeIndexException {
+        return createLSMTreeWithAntiMatterTuples(memBufferCache, memFreePageManager, ioManager, file, diskBufferCache,
+                diskFileMapProvider, typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories,
+                rtreePolicyType, mergePolicy, opTrackerFactory, ioScheduler, ioOpCallbackProvider,
+                linearizerCmpFactory, 0);
+    }
+
+    public static LSMRTreeWithAntiMatterTuples createLSMTreeWithAntiMatterTuples(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IIOManager ioManager, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            ILinearizeComparatorFactory linearizerCmpFactory, int startIODeviceIndex) throws TreeIndexException {
+
+        LSMRTreeTupleWriterFactory rtreeTupleWriterFactory = new LSMRTreeTupleWriterFactory(typeTraits, false);
+        LSMRTreeTupleWriterFactory btreeTupleWriterFactory = new LSMRTreeTupleWriterFactory(typeTraits, true);
+
+        LSMRTreeCopyTupleWriterFactory copyTupleWriterFactory = new LSMRTreeCopyTupleWriterFactory(typeTraits);
+
+        ITreeIndexFrameFactory rtreeInteriorFrameFactory = new RTreeNSMInteriorFrameFactory(rtreeTupleWriterFactory,
+                valueProviderFactories, rtreePolicyType);
+        ITreeIndexFrameFactory rtreeLeafFrameFactory = new RTreeNSMLeafFrameFactory(rtreeTupleWriterFactory,
+                valueProviderFactories, rtreePolicyType);
+
+        ITreeIndexFrameFactory btreeInteriorFrameFactory = new BTreeNSMInteriorFrameFactory(btreeTupleWriterFactory);
+        ITreeIndexFrameFactory btreeLeafFrameFactory = new BTreeNSMLeafFrameFactory(btreeTupleWriterFactory);
+
+        ITreeIndexFrameFactory copyTupleLeafFrameFactory = new RTreeNSMLeafFrameFactory(copyTupleWriterFactory,
+                valueProviderFactories, rtreePolicyType);
+
+        ITreeIndexMetaDataFrameFactory metaFrameFactory = new LIFOMetaDataFrameFactory();
+        LinkedListFreePageManagerFactory freePageManagerFactory = new LinkedListFreePageManagerFactory(diskBufferCache,
+                metaFrameFactory);
+
+        TreeIndexFactory<RTree> diskRTreeFactory = new RTreeFactory(diskBufferCache, diskFileMapProvider,
+                freePageManagerFactory, rtreeInteriorFrameFactory, copyTupleLeafFrameFactory, rtreeCmpFactories,
+                typeTraits.length);
+
+        TreeIndexFactory<RTree> bulkLoadRTreeFactory = new RTreeFactory(diskBufferCache, diskFileMapProvider,
+                freePageManagerFactory, rtreeInteriorFrameFactory, rtreeLeafFrameFactory, rtreeCmpFactories,
+                typeTraits.length);
+
+        // The first field is for the sorted curve (e.g. Hilbert curve), and the
+        // second field is for the primary key.
+        int[] comparatorFields = { 0, btreeCmpFactories.length - 1 };
+        IBinaryComparatorFactory[] linearizerArray = { linearizerCmpFactory,
+                btreeCmpFactories[btreeCmpFactories.length - 1] };
+
+        ILSMIndexFileManager fileNameManager = new LSMRTreeWithAntiMatterTuplesFileManager(ioManager,
+                diskFileMapProvider, file, diskRTreeFactory, startIODeviceIndex);
+        LSMRTreeWithAntiMatterTuples lsmTree = new LSMRTreeWithAntiMatterTuples(memBufferCache, memFreePageManager,
+                rtreeInteriorFrameFactory, rtreeLeafFrameFactory, btreeInteriorFrameFactory, btreeLeafFrameFactory,
+                fileNameManager, diskRTreeFactory, bulkLoadRTreeFactory, diskFileMapProvider, typeTraits.length,
+                rtreeCmpFactories, btreeCmpFactories, linearizerCmpFactory, comparatorFields, linearizerArray,
+                mergePolicy, opTrackerFactory, ioScheduler, ioOpCallbackProvider);
+        return lsmTree;
+    }
+
+    public static ILinearizeComparatorFactory proposeBestLinearizer(ITypeTraits[] typeTraits, int numKeyFields)
+            throws TreeIndexException {
+        for (int i = 0; i < numKeyFields; i++) {
+            if (!(typeTraits[i].getClass().equals(typeTraits[0].getClass()))) {
+                throw new TreeIndexException("Cannot propose linearizer if dimensions have different types");
+            }
+        }
+
+        if (numKeyFields / 2 == 2 && (typeTraits[0].getClass() == DoublePointable.TYPE_TRAITS.getClass())) {
+            return new HilbertDoubleComparatorFactory(2);
+        } else if (typeTraits[0].getClass() == DoublePointable.TYPE_TRAITS.getClass()) {
+            return new ZCurveDoubleComparatorFactory(numKeyFields / 2);
+        } else if (typeTraits[0].getClass() == IntegerPointable.TYPE_TRAITS.getClass()) {
+            return new ZCurveIntComparatorFactory(numKeyFields / 2);
+        }
+
+        throw new TreeIndexException("Cannot propose linearizer");
+    }
+}
diff --git a/hyracks/hyracks-storage-am-rtree/pom.xml b/hyracks/hyracks-storage-am-rtree/pom.xml
index 74d8927..d73ce00 100644
--- a/hyracks/hyracks-storage-am-rtree/pom.xml
+++ b/hyracks/hyracks-storage-am-rtree/pom.xml
@@ -1,14 +1,12 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-am-rtree</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-am-rtree</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -29,30 +27,30 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
-  	</dependency>  	
+  	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
-  	</dependency>  	
+  	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
-  	</dependency>  	
+  	</dependency>
   	<dependency>
   		<groupId>junit</groupId>
   		<artifactId>junit</artifactId>
   		<version>4.8.1</version>
   		<type>jar</type>
   		<scope>test</scope>
-  	</dependency>  	  		
+  	</dependency>
   </dependencies>
 </project>
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/api/IRTreeInteriorFrame.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/api/IRTreeInteriorFrame.java
index 5f333f3..59c047c 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/api/IRTreeInteriorFrame.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/api/IRTreeInteriorFrame.java
@@ -22,9 +22,9 @@
 
 public interface IRTreeInteriorFrame extends IRTreeFrame {
 
-    public boolean findBestChild(ITupleReference tuple, MultiComparator cmp);
+    public int findBestChild(ITupleReference tuple, MultiComparator cmp);
 
-    public int getBestChildPageId();
+    public boolean checkIfEnlarementIsNeeded(ITupleReference tuple, MultiComparator cmp);
 
     public int getChildPageId(int tupleIndex);
 
@@ -36,9 +36,6 @@
 
     public void adjustKey(ITupleReference tuple, int tupleIndex, MultiComparator cmp) throws TreeIndexException;
 
-    public boolean recomputeMBR(ITupleReference tuple, int tupleIndex, MultiComparator cmp);
-
     public void enlarge(ITupleReference tuple, MultiComparator cmp);
 
-    boolean checkEnlargement(ITupleReference tuple, MultiComparator cmp);
 }
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/api/IRTreeLeafFrame.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/api/IRTreeLeafFrame.java
index 3005785..858a40d 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/api/IRTreeLeafFrame.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/api/IRTreeLeafFrame.java
@@ -20,8 +20,9 @@
 
 public interface IRTreeLeafFrame extends IRTreeFrame {
 
-	public int findTupleIndex(ITupleReference tuple, MultiComparator cmp);
+    public int findTupleIndex(ITupleReference tuple, MultiComparator cmp);
 
-	public boolean intersect(ITupleReference tuple, int tupleIndex,
-			MultiComparator cmp);
+    public boolean intersect(ITupleReference tuple, int tupleIndex, MultiComparator cmp);
+
+    public ITupleReference getBeforeTuple(ITupleReference tuple, int targetTupleIndex, MultiComparator cmp);
 }
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/api/IRTreePolicy.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/api/IRTreePolicy.java
new file mode 100644
index 0000000..a0cc5e8
--- /dev/null
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/api/IRTreePolicy.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.rtree.api;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.ISlotManager;
+import edu.uci.ics.hyracks.storage.am.common.api.ISplitKey;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+
+public interface IRTreePolicy {
+    public void split(ITreeIndexFrame leftFrame, ByteBuffer buf, ITreeIndexFrame rightFrame, ISlotManager slotManager,
+            ITreeIndexTupleReference frameTuple, ITupleReference tuple, ISplitKey splitKey);
+
+    public int findBestChildPosition(ITreeIndexFrame frame, ITupleReference tuple, ITreeIndexTupleReference frameTuple,
+            MultiComparator cmp);
+}
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeDataflowHelper.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeDataflowHelper.java
index 0470da9..5c3b314 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeDataflowHelper.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeDataflowHelper.java
@@ -19,24 +19,29 @@
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
 
 public class RTreeDataflowHelper extends TreeIndexDataflowHelper {
 
     private final IPrimitiveValueProviderFactory[] valueProviderFactories;
+    private final RTreePolicyType rtreePolicyType;
 
     public RTreeDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition,
-            IPrimitiveValueProviderFactory[] valueProviderFactories) {
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType) {
         super(opDesc, ctx, partition);
         this.valueProviderFactories = valueProviderFactories;
+        this.rtreePolicyType = rtreePolicyType;
     }
 
     @Override
     public ITreeIndex createIndexInstance() throws HyracksDataException {
-        return RTreeUtils.createRTree(treeOpDesc.getStorageManager().getBufferCache(ctx),
-                treeOpDesc.getTreeIndexTypeTraits(), valueProviderFactories,
-                treeOpDesc.getTreeIndexComparatorFactories());
+        AbstractTreeIndexOperatorDescriptor treeOpDesc = (AbstractTreeIndexOperatorDescriptor) opDesc;
+        return RTreeUtils.createRTree(treeOpDesc.getStorageManager().getBufferCache(ctx), treeOpDesc
+                .getStorageManager().getFileMapProvider(ctx), treeOpDesc.getTreeIndexTypeTraits(),
+                valueProviderFactories, treeOpDesc.getTreeIndexComparatorFactories(), rtreePolicyType, file);
     }
 }
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeDataflowHelperFactory.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeDataflowHelperFactory.java
index 6b9fd4c..06af8ee 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeDataflowHelperFactory.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeDataflowHelperFactory.java
@@ -20,20 +20,24 @@
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 
 public class RTreeDataflowHelperFactory implements IIndexDataflowHelperFactory {
 
     private static final long serialVersionUID = 1L;
 
     private final IPrimitiveValueProviderFactory[] valueProviderFactories;
+    private final RTreePolicyType rtreePolicyType;
 
-    public RTreeDataflowHelperFactory(IPrimitiveValueProviderFactory[] valueProviderFactories) {
+    public RTreeDataflowHelperFactory(IPrimitiveValueProviderFactory[] valueProviderFactories,
+            RTreePolicyType rtreePolicyType) {
         this.valueProviderFactories = valueProviderFactories;
+        this.rtreePolicyType = rtreePolicyType;
     }
 
     @Override
     public IndexDataflowHelper createIndexDataflowHelper(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
             int partition) {
-        return new RTreeDataflowHelper(opDesc, ctx, partition, valueProviderFactories);
+        return new RTreeDataflowHelper(opDesc, ctx, partition, valueProviderFactories, rtreePolicyType);
     }
 }
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorDescriptor.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorDescriptor.java
index d9b7b97..d718c69 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorDescriptor.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorDescriptor.java
@@ -23,12 +23,13 @@
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
 
 public class RTreeSearchOperatorDescriptor extends AbstractTreeIndexOperatorDescriptor {
 
@@ -37,20 +38,22 @@
     protected int[] keyFields; // fields in input tuple to be used as keys
 
     public RTreeSearchOperatorDescriptor(IOperatorDescriptorRegistry spec, RecordDescriptor recDesc,
-            IStorageManagerInterface storageManager, IIndexRegistryProvider<IIndex> indexRegistryProvider,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lifecycleManagerProvider,
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, int[] keyFields,
             IIndexDataflowHelperFactory dataflowHelperFactory, boolean retainInput,
-            IOperationCallbackProvider opCallbackProvider) {
-        super(spec, 1, 1, recDesc, storageManager, indexRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, dataflowHelperFactory, null, retainInput, opCallbackProvider);
+            ISearchOperationCallbackFactory searchOpCallbackFactory) {
+        super(spec, 1, 1, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, dataflowHelperFactory, null, retainInput,
+                NoOpLocalResourceFactoryProvider.INSTANCE, searchOpCallbackFactory,
+                NoOpOperationCallbackFactory.INSTANCE);
+
         this.keyFields = keyFields;
     }
 
     @Override
     public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
             IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
-        return new RTreeSearchOperatorNodePushable(this, ctx, opCallbackProvider, partition, recordDescProvider,
-                keyFields);
+        return new RTreeSearchOperatorNodePushable(this, ctx, partition, recordDescProvider, keyFields);
     }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorNodePushable.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorNodePushable.java
index 3781037..de4961b 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorNodePushable.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorNodePushable.java
@@ -17,22 +17,21 @@
 
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.PermutingFrameTupleReference;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexSearchOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexSearchOperatorNodePushable;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingFrameTupleReference;
 import edu.uci.ics.hyracks.storage.am.rtree.impls.SearchPredicate;
 import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
 
-public class RTreeSearchOperatorNodePushable extends TreeIndexSearchOperatorNodePushable {
+public class RTreeSearchOperatorNodePushable extends IndexSearchOperatorNodePushable {
     protected PermutingFrameTupleReference searchKey;
     protected MultiComparator cmp;
 
     public RTreeSearchOperatorNodePushable(AbstractTreeIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
-            IOperationCallbackProvider opCallbackProvider, int partition, IRecordDescriptorProvider recordDescProvider,
-            int[] keyFields) {
+            int partition, IRecordDescriptorProvider recordDescProvider, int[] keyFields) {
         super(opDesc, ctx, partition, recordDescProvider);
         if (keyFields != null && keyFields.length > 0) {
             searchKey = new PermutingFrameTupleReference();
@@ -42,6 +41,7 @@
 
     @Override
     protected ISearchPredicate createSearchPredicate() {
+        ITreeIndex treeIndex = (ITreeIndex) index;
         cmp = RTreeUtils.getSearchMultiComparator(treeIndex.getComparatorFactories(), searchKey);
         return new SearchPredicate(searchKey, cmp);
     }
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RStarTreePolicy.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RStarTreePolicy.java
new file mode 100644
index 0000000..aafecd5
--- /dev/null
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RStarTreePolicy.java
@@ -0,0 +1,354 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.rtree.frames;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.ISlotManager;
+import edu.uci.ics.hyracks.storage.am.common.api.ISplitKey;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleWriter;
+import edu.uci.ics.hyracks.storage.am.common.frames.FrameOpSpaceStatus;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeFrame;
+import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreePolicy;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.EntriesOrder;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTreeSplitKey;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.Rectangle;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.TupleEntryArrayList;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.UnorderedSlotManager;
+import edu.uci.ics.hyracks.storage.am.rtree.tuples.RTreeTypeAwareTupleWriter;
+
+public class RStarTreePolicy implements IRTreePolicy {
+
+    private TupleEntryArrayList tupleEntries1;
+    private TupleEntryArrayList tupleEntries2;
+    private Rectangle[] rec;
+
+    private static final int nearMinimumOverlapFactor = 32;
+    private static final double splitFactor = 0.4;
+    private static final int numTuplesEntries = 100;
+
+    private final ITreeIndexTupleWriter tupleWriter;
+    private final IPrimitiveValueProvider[] keyValueProviders;
+    private ITreeIndexTupleReference cmpFrameTuple;
+    private final int totalFreeSpaceOff;
+
+    public RStarTreePolicy(ITreeIndexTupleWriter tupleWriter, IPrimitiveValueProvider[] keyValueProviders,
+            ITreeIndexTupleReference cmpFrameTuple, int totalFreeSpaceOff) {
+        this.tupleWriter = tupleWriter;
+        this.keyValueProviders = keyValueProviders;
+        this.totalFreeSpaceOff = totalFreeSpaceOff;
+        this.cmpFrameTuple = cmpFrameTuple;
+        tupleEntries1 = new TupleEntryArrayList(numTuplesEntries, numTuplesEntries);
+        tupleEntries2 = new TupleEntryArrayList(numTuplesEntries, numTuplesEntries);
+        rec = new Rectangle[4];
+        for (int i = 0; i < 4; i++) {
+            rec[i] = new Rectangle(keyValueProviders.length / 2);
+        }
+    }
+
+    @Override
+    public void split(ITreeIndexFrame leftFrame, ByteBuffer buf, ITreeIndexFrame rightFrame, ISlotManager slotManager,
+            ITreeIndexTupleReference frameTuple, ITupleReference tuple, ISplitKey splitKey) {
+        RTreeSplitKey rTreeSplitKey = ((RTreeSplitKey) splitKey);
+        RTreeTypeAwareTupleWriter rTreeTupleWriterleftRTreeFrame = ((RTreeTypeAwareTupleWriter) tupleWriter);
+        RTreeTypeAwareTupleWriter rTreeTupleWriterRightFrame = ((RTreeTypeAwareTupleWriter) rightFrame.getTupleWriter());
+
+        RTreeNSMFrame leftRTreeFrame = ((RTreeNSMFrame) leftFrame);
+
+        // calculations are based on the R*-tree paper
+        int m = (int) Math.floor((leftRTreeFrame.getTupleCount() + 1) * splitFactor);
+        int splitDistribution = leftRTreeFrame.getTupleCount() - (2 * m) + 2;
+
+        // to calculate the minimum margin in order to pick the split axis
+        double minMargin = Double.MAX_VALUE;
+        int splitAxis = 0, sortOrder = 0;
+
+        int maxFieldPos = keyValueProviders.length / 2;
+        for (int i = 0; i < maxFieldPos; i++) {
+            int j = maxFieldPos + i;
+            for (int k = 0; k < leftRTreeFrame.getTupleCount(); ++k) {
+
+                frameTuple.resetByTupleIndex(leftRTreeFrame, k);
+                double LowerKey = keyValueProviders[i]
+                        .getValue(frameTuple.getFieldData(i), frameTuple.getFieldStart(i));
+                double UpperKey = keyValueProviders[j]
+                        .getValue(frameTuple.getFieldData(j), frameTuple.getFieldStart(j));
+
+                tupleEntries1.add(k, LowerKey);
+                tupleEntries2.add(k, UpperKey);
+            }
+            double LowerKey = keyValueProviders[i].getValue(tuple.getFieldData(i), tuple.getFieldStart(i));
+            double UpperKey = keyValueProviders[j].getValue(tuple.getFieldData(j), tuple.getFieldStart(j));
+
+            tupleEntries1.add(-1, LowerKey);
+            tupleEntries2.add(-1, UpperKey);
+
+            tupleEntries1.sort(EntriesOrder.ASCENDING, leftRTreeFrame.getTupleCount() + 1);
+            tupleEntries2.sort(EntriesOrder.ASCENDING, leftRTreeFrame.getTupleCount() + 1);
+
+            double lowerMargin = 0.0, upperMargin = 0.0;
+            // generate distribution
+            for (int k = 1; k <= splitDistribution; ++k) {
+                int d = m - 1 + k;
+
+                generateDist(leftRTreeFrame, frameTuple, tuple, tupleEntries1, rec[0], 0, d);
+                generateDist(leftRTreeFrame, frameTuple, tuple, tupleEntries2, rec[1], 0, d);
+                generateDist(leftRTreeFrame, frameTuple, tuple, tupleEntries1, rec[2], d,
+                        leftRTreeFrame.getTupleCount() + 1);
+                generateDist(leftRTreeFrame, frameTuple, tuple, tupleEntries2, rec[3], d,
+                        leftRTreeFrame.getTupleCount() + 1);
+
+                // calculate the margin of the distributions
+                lowerMargin += rec[0].margin() + rec[2].margin();
+                upperMargin += rec[1].margin() + rec[3].margin();
+            }
+            double margin = Math.min(lowerMargin, upperMargin);
+
+            // store minimum margin as split axis
+            if (margin < minMargin) {
+                minMargin = margin;
+                splitAxis = i;
+                sortOrder = (lowerMargin < upperMargin) ? 0 : 2;
+            }
+
+            tupleEntries1.clear();
+            tupleEntries2.clear();
+        }
+
+        for (int i = 0; i < leftRTreeFrame.getTupleCount(); ++i) {
+            frameTuple.resetByTupleIndex(leftRTreeFrame, i);
+            double key = keyValueProviders[splitAxis + sortOrder].getValue(
+                    frameTuple.getFieldData(splitAxis + sortOrder), frameTuple.getFieldStart(splitAxis + sortOrder));
+            tupleEntries1.add(i, key);
+        }
+        double key = keyValueProviders[splitAxis + sortOrder].getValue(tuple.getFieldData(splitAxis + sortOrder),
+                tuple.getFieldStart(splitAxis + sortOrder));
+        tupleEntries1.add(-1, key);
+        tupleEntries1.sort(EntriesOrder.ASCENDING, leftRTreeFrame.getTupleCount() + 1);
+
+        double minArea = Double.MAX_VALUE;
+        double minOverlap = Double.MAX_VALUE;
+        int splitPoint = 0;
+        for (int i = 1; i <= splitDistribution; ++i) {
+            int d = m - 1 + i;
+
+            generateDist(leftRTreeFrame, frameTuple, tuple, tupleEntries1, rec[0], 0, d);
+            generateDist(leftRTreeFrame, frameTuple, tuple, tupleEntries1, rec[2], d,
+                    leftRTreeFrame.getTupleCount() + 1);
+
+            double overlap = rec[0].overlappedArea(rec[2]);
+            if (overlap < minOverlap) {
+                splitPoint = d;
+                minOverlap = overlap;
+                minArea = rec[0].area() + rec[2].area();
+            } else if (overlap == minOverlap) {
+                double area = rec[0].area() + rec[2].area();
+                if (area < minArea) {
+                    splitPoint = d;
+                    minArea = area;
+                }
+            }
+        }
+        int startIndex, endIndex;
+        if (splitPoint < (leftRTreeFrame.getTupleCount() + 1) / 2) {
+            startIndex = 0;
+            endIndex = splitPoint;
+        } else {
+            startIndex = splitPoint;
+            endIndex = (leftRTreeFrame.getTupleCount() + 1);
+        }
+        boolean insertedNewTupleInRightFrame = false;
+        int totalBytes = 0, numOfDeletedTuples = 0;
+        for (int i = startIndex; i < endIndex; i++) {
+            if (tupleEntries1.get(i).getTupleIndex() != -1) {
+                frameTuple.resetByTupleIndex(leftRTreeFrame, tupleEntries1.get(i).getTupleIndex());
+                rightFrame.insert(frameTuple, -1);
+                ((UnorderedSlotManager) slotManager).modifySlot(
+                        slotManager.getSlotOff(tupleEntries1.get(i).getTupleIndex()), -1);
+                totalBytes += leftRTreeFrame.getTupleSize(frameTuple);
+                numOfDeletedTuples++;
+            } else {
+                insertedNewTupleInRightFrame = true;
+            }
+        }
+
+        ((UnorderedSlotManager) slotManager).deleteEmptySlots();
+
+        // maintain space information
+        buf.putInt(totalFreeSpaceOff, buf.getInt(totalFreeSpaceOff) + totalBytes
+                + (slotManager.getSlotSize() * numOfDeletedTuples));
+
+        // compact both pages
+        rightFrame.compact();
+        leftRTreeFrame.compact();
+
+        // The assumption here is that the new tuple cannot be larger than page
+        // size, thus it must fit in either pages.
+        if (insertedNewTupleInRightFrame) {
+            if (rightFrame.hasSpaceInsert(tuple) == FrameOpSpaceStatus.SUFFICIENT_CONTIGUOUS_SPACE) {
+                rightFrame.insert(tuple, -1);
+            } else {
+                leftRTreeFrame.insert(tuple, -1);
+            }
+        } else if (leftRTreeFrame.hasSpaceInsert(tuple) == FrameOpSpaceStatus.SUFFICIENT_CONTIGUOUS_SPACE) {
+            leftRTreeFrame.insert(tuple, -1);
+        } else {
+            rightFrame.insert(tuple, -1);
+        }
+
+        int tupleOff = slotManager.getTupleOff(slotManager.getSlotEndOff());
+        frameTuple.resetByTupleOffset(buf, tupleOff);
+        int splitKeySize = tupleWriter.bytesRequired(frameTuple, 0, keyValueProviders.length);
+
+        splitKey.initData(splitKeySize);
+        leftRTreeFrame.adjustMBR();
+        rTreeTupleWriterleftRTreeFrame.writeTupleFields(leftRTreeFrame.getTuples(), 0,
+                rTreeSplitKey.getLeftPageBuffer(), 0);
+        rTreeSplitKey.getLeftTuple().resetByTupleOffset(rTreeSplitKey.getLeftPageBuffer(), 0);
+
+        ((IRTreeFrame) rightFrame).adjustMBR();
+        rTreeTupleWriterRightFrame.writeTupleFields(((RTreeNSMFrame) rightFrame).getTuples(), 0,
+                rTreeSplitKey.getRightPageBuffer(), 0);
+        rTreeSplitKey.getRightTuple().resetByTupleOffset(rTreeSplitKey.getRightPageBuffer(), 0);
+
+        tupleEntries1.clear();
+        tupleEntries2.clear();
+    }
+
+    public void generateDist(ITreeIndexFrame leftRTreeFrame, ITreeIndexTupleReference frameTuple,
+            ITupleReference tuple, TupleEntryArrayList entries, Rectangle rec, int start, int end) {
+        int j = 0;
+        while (entries.get(j).getTupleIndex() == -1) {
+            j++;
+        }
+        frameTuple.resetByTupleIndex(leftRTreeFrame, entries.get(j).getTupleIndex());
+        rec.set(frameTuple, keyValueProviders);
+        for (int i = start; i < end; ++i) {
+            if (i != j) {
+                if (entries.get(i).getTupleIndex() != -1) {
+                    frameTuple.resetByTupleIndex(leftRTreeFrame, entries.get(i).getTupleIndex());
+                    rec.enlarge(frameTuple, keyValueProviders);
+                } else {
+                    rec.enlarge(tuple, keyValueProviders);
+                }
+            }
+        }
+    }
+
+    @Override
+    public int findBestChildPosition(ITreeIndexFrame frame, ITupleReference tuple, ITreeIndexTupleReference frameTuple,
+            MultiComparator cmp) {
+        cmpFrameTuple.setFieldCount(cmp.getKeyFieldCount());
+        frameTuple.setFieldCount(cmp.getKeyFieldCount());
+
+        int bestChild = 0;
+        double minEnlargedArea = Double.MAX_VALUE;
+
+        // the children pointers in the node point to leaves
+        if (frame.getLevel() == 1) {
+            // find least overlap enlargement, use minimum enlarged area to
+            // break tie, if tie still exists use minimum area to break it
+            for (int i = 0; i < frame.getTupleCount(); ++i) {
+                frameTuple.resetByTupleIndex(frame, i);
+                double enlargedArea = RTreeComputationUtils.enlargedArea(frameTuple, tuple, cmp, keyValueProviders);
+                tupleEntries1.add(i, enlargedArea);
+                if (enlargedArea < minEnlargedArea) {
+                    minEnlargedArea = enlargedArea;
+                    bestChild = i;
+                }
+            }
+            if (minEnlargedArea < RTreeNSMFrame.doubleEpsilon() || minEnlargedArea > RTreeNSMFrame.doubleEpsilon()) {
+                minEnlargedArea = Double.MAX_VALUE;
+                int k;
+                if (frame.getTupleCount() > nearMinimumOverlapFactor) {
+                    // sort the entries based on their area enlargement needed
+                    // to include the object
+                    tupleEntries1.sort(EntriesOrder.ASCENDING, frame.getTupleCount());
+                    k = nearMinimumOverlapFactor;
+                } else {
+                    k = frame.getTupleCount();
+                }
+
+                double minOverlap = Double.MAX_VALUE;
+                int id = 0;
+                for (int i = 0; i < k; ++i) {
+                    double difference = 0.0;
+                    for (int j = 0; j < frame.getTupleCount(); ++j) {
+                        frameTuple.resetByTupleIndex(frame, j);
+                        cmpFrameTuple.resetByTupleIndex(frame, tupleEntries1.get(i).getTupleIndex());
+
+                        int c = ((RTreeNSMInteriorFrame) frame).pointerCmp(frameTuple, cmpFrameTuple, cmp);
+                        if (c != 0) {
+                            double intersection = RTreeComputationUtils.overlappedArea(frameTuple, tuple,
+                                    cmpFrameTuple, cmp, keyValueProviders);
+                            if (intersection != 0.0) {
+                                difference += intersection
+                                        - RTreeComputationUtils.overlappedArea(frameTuple, null, cmpFrameTuple, cmp,
+                                                keyValueProviders);
+                            }
+                        } else {
+                            id = j;
+                        }
+                    }
+
+                    double enlargedArea = RTreeComputationUtils.enlargedArea(cmpFrameTuple, tuple, cmp,
+                            keyValueProviders);
+                    if (difference < minOverlap) {
+                        minOverlap = difference;
+                        minEnlargedArea = enlargedArea;
+                        bestChild = id;
+                    } else if (difference == minOverlap) {
+                        if (enlargedArea < minEnlargedArea) {
+                            minEnlargedArea = enlargedArea;
+                            bestChild = id;
+                        } else if (enlargedArea == minEnlargedArea) {
+                            double area = RTreeComputationUtils.area(cmpFrameTuple, cmp, keyValueProviders);
+                            frameTuple.resetByTupleIndex(frame, bestChild);
+                            double minArea = RTreeComputationUtils.area(frameTuple, cmp, keyValueProviders);
+                            if (area < minArea) {
+                                bestChild = id;
+                            }
+                        }
+                    }
+                }
+            }
+        } else { // find minimum enlarged area, use minimum area to break tie
+            for (int i = 0; i < frame.getTupleCount(); i++) {
+                frameTuple.resetByTupleIndex(frame, i);
+                double enlargedArea = RTreeComputationUtils.enlargedArea(frameTuple, tuple, cmp, keyValueProviders);
+                if (enlargedArea < minEnlargedArea) {
+                    minEnlargedArea = enlargedArea;
+                    bestChild = i;
+                } else if (enlargedArea == minEnlargedArea) {
+                    double area = RTreeComputationUtils.area(frameTuple, cmp, keyValueProviders);
+                    frameTuple.resetByTupleIndex(frame, bestChild);
+                    double minArea = RTreeComputationUtils.area(frameTuple, cmp, keyValueProviders);
+                    if (area < minArea) {
+                        bestChild = i;
+                    }
+                }
+            }
+        }
+        tupleEntries1.clear();
+
+        return bestChild;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeComputationUtils.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeComputationUtils.java
new file mode 100644
index 0000000..f0122b3
--- /dev/null
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeComputationUtils.java
@@ -0,0 +1,137 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.rtree.frames;
+
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProvider;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+
+public class RTreeComputationUtils {
+
+    public static double enlargedArea(ITupleReference tuple, ITupleReference tupleToBeInserted, MultiComparator cmp,
+            IPrimitiveValueProvider[] keyValueProviders) {
+        double areaBeforeEnlarge = RTreeComputationUtils.area(tuple, cmp, keyValueProviders);
+        double areaAfterEnlarge = 1.0;
+
+        int maxFieldPos = cmp.getKeyFieldCount() / 2;
+        for (int i = 0; i < maxFieldPos; i++) {
+            int j = maxFieldPos + i;
+            double pHigh, pLow;
+            int c = cmp.getComparators()[i].compare(tuple.getFieldData(i), tuple.getFieldStart(i),
+                    tuple.getFieldLength(i), tupleToBeInserted.getFieldData(i), tupleToBeInserted.getFieldStart(i),
+                    tupleToBeInserted.getFieldLength(i));
+            if (c < 0) {
+                pLow = keyValueProviders[i].getValue(tuple.getFieldData(i), tuple.getFieldStart(i));
+            } else {
+                pLow = keyValueProviders[i].getValue(tupleToBeInserted.getFieldData(i),
+                        tupleToBeInserted.getFieldStart(i));
+            }
+
+            c = cmp.getComparators()[j].compare(tuple.getFieldData(j), tuple.getFieldStart(j), tuple.getFieldLength(j),
+                    tupleToBeInserted.getFieldData(j), tupleToBeInserted.getFieldStart(j),
+                    tupleToBeInserted.getFieldLength(j));
+            if (c > 0) {
+                pHigh = keyValueProviders[j].getValue(tuple.getFieldData(j), tuple.getFieldStart(j));
+            } else {
+                pHigh = keyValueProviders[j].getValue(tupleToBeInserted.getFieldData(j),
+                        tupleToBeInserted.getFieldStart(j));
+            }
+            areaAfterEnlarge *= pHigh - pLow;
+        }
+        return areaAfterEnlarge - areaBeforeEnlarge;
+    }
+
+    public static double overlappedArea(ITupleReference tuple1, ITupleReference tupleToBeInserted,
+            ITupleReference tuple2, MultiComparator cmp, IPrimitiveValueProvider[] keyValueProviders) {
+        double area = 1.0;
+        double f1, f2;
+
+        int maxFieldPos = cmp.getKeyFieldCount() / 2;
+        for (int i = 0; i < maxFieldPos; i++) {
+            int j = maxFieldPos + i;
+            double pHigh1, pLow1;
+            if (tupleToBeInserted != null) {
+                int c = cmp.getComparators()[i].compare(tuple1.getFieldData(i), tuple1.getFieldStart(i),
+                        tuple1.getFieldLength(i), tupleToBeInserted.getFieldData(i),
+                        tupleToBeInserted.getFieldStart(i), tupleToBeInserted.getFieldLength(i));
+                if (c < 0) {
+                    pLow1 = keyValueProviders[i].getValue(tuple1.getFieldData(i), tuple1.getFieldStart(i));
+                } else {
+                    pLow1 = keyValueProviders[i].getValue(tupleToBeInserted.getFieldData(i),
+                            tupleToBeInserted.getFieldStart(i));
+                }
+
+                c = cmp.getComparators()[j].compare(tuple1.getFieldData(j), tuple1.getFieldStart(j),
+                        tuple1.getFieldLength(j), tupleToBeInserted.getFieldData(j),
+                        tupleToBeInserted.getFieldStart(j), tupleToBeInserted.getFieldLength(j));
+                if (c > 0) {
+                    pHigh1 = keyValueProviders[j].getValue(tuple1.getFieldData(j), tuple1.getFieldStart(j));
+                } else {
+                    pHigh1 = keyValueProviders[j].getValue(tupleToBeInserted.getFieldData(j),
+                            tupleToBeInserted.getFieldStart(j));
+                }
+            } else {
+                pLow1 = keyValueProviders[i].getValue(tuple1.getFieldData(i), tuple1.getFieldStart(i));
+                pHigh1 = keyValueProviders[j].getValue(tuple1.getFieldData(j), tuple1.getFieldStart(j));
+            }
+
+            double pLow2 = keyValueProviders[i].getValue(tuple2.getFieldData(i), tuple2.getFieldStart(i));
+            double pHigh2 = keyValueProviders[j].getValue(tuple2.getFieldData(j), tuple2.getFieldStart(j));
+
+            if (pLow1 > pHigh2 || pHigh1 < pLow2) {
+                return 0.0;
+            }
+
+            f1 = Math.max(pLow1, pLow2);
+            f2 = Math.min(pHigh1, pHigh2);
+            area *= f2 - f1;
+        }
+        return area;
+    }
+
+    public static double area(ITupleReference tuple, MultiComparator cmp, IPrimitiveValueProvider[] keyValueProviders) {
+        double area = 1.0;
+        int maxFieldPos = cmp.getKeyFieldCount() / 2;
+        for (int i = 0; i < maxFieldPos; i++) {
+            int j = maxFieldPos + i;
+            area *= keyValueProviders[j].getValue(tuple.getFieldData(j), tuple.getFieldStart(j))
+                    - keyValueProviders[i].getValue(tuple.getFieldData(i), tuple.getFieldStart(i));
+        }
+        return area;
+    }
+
+    public static boolean containsRegion(ITupleReference tuple1, ITupleReference tuple2, MultiComparator cmp,
+            IPrimitiveValueProvider[] keyValueProviders) {
+        int maxFieldPos = cmp.getKeyFieldCount() / 2;
+        for (int i = 0; i < maxFieldPos; i++) {
+            int j = maxFieldPos + i;
+            int c = cmp.getComparators()[i]
+                    .compare(tuple1.getFieldData(i), tuple1.getFieldStart(i), tuple1.getFieldLength(i),
+                            tuple2.getFieldData(i), tuple2.getFieldStart(i), tuple2.getFieldLength(i));
+            if (c > 0) {
+                return false;
+            }
+
+            c = cmp.getComparators()[j]
+                    .compare(tuple1.getFieldData(j), tuple1.getFieldStart(j), tuple1.getFieldLength(j),
+                            tuple2.getFieldData(j), tuple2.getFieldStart(j), tuple2.getFieldLength(j));
+            if (c < 0) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMFrame.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMFrame.java
index 84e66ef..eeada0a 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMFrame.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMFrame.java
@@ -21,15 +21,11 @@
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleWriter;
-import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
 import edu.uci.ics.hyracks.storage.am.common.frames.TreeIndexNSMFrame;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeFrame;
-import edu.uci.ics.hyracks.storage.am.rtree.impls.EntriesOrder;
-import edu.uci.ics.hyracks.storage.am.rtree.impls.RTreeSplitKey;
-import edu.uci.ics.hyracks.storage.am.rtree.impls.Rectangle;
-import edu.uci.ics.hyracks.storage.am.rtree.impls.TupleEntryArrayList;
+import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreePolicy;
 import edu.uci.ics.hyracks.storage.am.rtree.impls.UnorderedSlotManager;
-import edu.uci.ics.hyracks.storage.am.rtree.tuples.RTreeTypeAwareTupleWriter;
 
 public abstract class RTreeNSMFrame extends TreeIndexNSMFrame implements IRTreeFrame {
     protected static final int pageNsnOff = smFlagOff + 1;
@@ -37,33 +33,27 @@
 
     protected ITreeIndexTupleReference[] tuples;
     protected ITreeIndexTupleReference cmpFrameTuple;
-    protected TupleEntryArrayList tupleEntries1; // used for split and checking
-                                                 // enlargement
-    protected TupleEntryArrayList tupleEntries2; // used for split
 
-    protected Rectangle[] rec;
-
-    protected static final double splitFactor = 0.4;
-    protected static final int nearMinimumOverlapFactor = 32;
     private static final double doubleEpsilon = computeDoubleEpsilon();
-    private static final int numTuplesEntries = 100;
     protected final IPrimitiveValueProvider[] keyValueProviders;
 
-    public RTreeNSMFrame(ITreeIndexTupleWriter tupleWriter, IPrimitiveValueProvider[] keyValueProviders) {
+    protected IRTreePolicy rtreePolicy;
+
+    public RTreeNSMFrame(ITreeIndexTupleWriter tupleWriter, IPrimitiveValueProvider[] keyValueProviders,
+            RTreePolicyType rtreePolicyType) {
         super(tupleWriter, new UnorderedSlotManager());
         this.tuples = new ITreeIndexTupleReference[keyValueProviders.length];
         for (int i = 0; i < keyValueProviders.length; i++) {
             this.tuples[i] = tupleWriter.createTupleReference();
         }
         cmpFrameTuple = tupleWriter.createTupleReference();
-
-        tupleEntries1 = new TupleEntryArrayList(numTuplesEntries, numTuplesEntries);
-        tupleEntries2 = new TupleEntryArrayList(numTuplesEntries, numTuplesEntries);
-        rec = new Rectangle[4];
-        for (int i = 0; i < 4; i++) {
-            rec[i] = new Rectangle(keyValueProviders.length / 2);
-        }
         this.keyValueProviders = keyValueProviders;
+
+        if (rtreePolicyType == RTreePolicyType.RTREE) {
+            rtreePolicy = new RTreePolicy(tupleWriter, keyValueProviders, cmpFrameTuple, totalFreeSpaceOff);
+        } else {
+            rtreePolicy = new RStarTreePolicy(tupleWriter, keyValueProviders, cmpFrameTuple, totalFreeSpaceOff);
+        }
     }
 
     private static double computeDoubleEpsilon() {
@@ -116,184 +106,17 @@
         buf.putInt(rightPageOff, rightPage);
     }
 
-    protected ITreeIndexTupleReference[] getTuples() {
+    public ITreeIndexTupleReference[] getTuples() {
         return tuples;
     }
 
     @Override
-    public void split(ITreeIndexFrame rightFrame, ITupleReference tuple, ISplitKey splitKey) throws TreeIndexException {
-        RTreeSplitKey rTreeSplitKey = ((RTreeSplitKey) splitKey);
-        RTreeTypeAwareTupleWriter rTreeTupleWriterLeftFrame = ((RTreeTypeAwareTupleWriter) tupleWriter);
-        RTreeTypeAwareTupleWriter rTreeTupleWriterRightFrame = ((RTreeTypeAwareTupleWriter) rightFrame.getTupleWriter());
-
-        // calculations are based on the R*-tree paper
-        int m = (int) Math.floor((getTupleCount() + 1) * splitFactor);
-        int splitDistribution = getTupleCount() - (2 * m) + 2;
-
-        // to calculate the minimum margin in order to pick the split axis
-        double minMargin = Double.MAX_VALUE;
-        int splitAxis = 0, sortOrder = 0;
-
-        int maxFieldPos = keyValueProviders.length / 2;
-        for (int i = 0; i < maxFieldPos; i++) {
-            int j = maxFieldPos + i;
-            for (int k = 0; k < getTupleCount(); ++k) {
-
-                frameTuple.resetByTupleIndex(this, k);
-                double LowerKey = keyValueProviders[i]
-                        .getValue(frameTuple.getFieldData(i), frameTuple.getFieldStart(i));
-                double UpperKey = keyValueProviders[j]
-                        .getValue(frameTuple.getFieldData(j), frameTuple.getFieldStart(j));
-
-                tupleEntries1.add(k, LowerKey);
-                tupleEntries2.add(k, UpperKey);
-            }
-            double LowerKey = keyValueProviders[i].getValue(tuple.getFieldData(i), tuple.getFieldStart(i));
-            double UpperKey = keyValueProviders[j].getValue(tuple.getFieldData(j), tuple.getFieldStart(j));
-
-            tupleEntries1.add(-1, LowerKey);
-            tupleEntries2.add(-1, UpperKey);
-
-            tupleEntries1.sort(EntriesOrder.ASCENDING, getTupleCount() + 1);
-            tupleEntries2.sort(EntriesOrder.ASCENDING, getTupleCount() + 1);
-
-            double lowerMargin = 0.0, upperMargin = 0.0;
-            // generate distribution
-            for (int k = 1; k <= splitDistribution; ++k) {
-                int d = m - 1 + k;
-
-                generateDist(tuple, tupleEntries1, rec[0], 0, d);
-                generateDist(tuple, tupleEntries2, rec[1], 0, d);
-                generateDist(tuple, tupleEntries1, rec[2], d, getTupleCount() + 1);
-                generateDist(tuple, tupleEntries2, rec[3], d, getTupleCount() + 1);
-
-                // calculate the margin of the distributions
-                lowerMargin += rec[0].margin() + rec[2].margin();
-                upperMargin += rec[1].margin() + rec[3].margin();
-            }
-            double margin = Math.min(lowerMargin, upperMargin);
-
-            // store minimum margin as split axis
-            if (margin < minMargin) {
-                minMargin = margin;
-                splitAxis = i;
-                sortOrder = (lowerMargin < upperMargin) ? 0 : 2;
-            }
-
-            tupleEntries1.clear();
-            tupleEntries2.clear();
-        }
-
-        for (int i = 0; i < getTupleCount(); ++i) {
-            frameTuple.resetByTupleIndex(this, i);
-            double key = keyValueProviders[splitAxis + sortOrder].getValue(
-                    frameTuple.getFieldData(splitAxis + sortOrder), frameTuple.getFieldStart(splitAxis + sortOrder));
-            tupleEntries1.add(i, key);
-        }
-        double key = keyValueProviders[splitAxis + sortOrder].getValue(tuple.getFieldData(splitAxis + sortOrder),
-                tuple.getFieldStart(splitAxis + sortOrder));
-        tupleEntries1.add(-1, key);
-        tupleEntries1.sort(EntriesOrder.ASCENDING, getTupleCount() + 1);
-
-        double minArea = Double.MAX_VALUE;
-        double minOverlap = Double.MAX_VALUE;
-        int splitPoint = 0;
-        for (int i = 1; i <= splitDistribution; ++i) {
-            int d = m - 1 + i;
-
-            generateDist(tuple, tupleEntries1, rec[0], 0, d);
-            generateDist(tuple, tupleEntries1, rec[2], d, getTupleCount() + 1);
-
-            double overlap = rec[0].overlappedArea(rec[2]);
-            if (overlap < minOverlap) {
-                splitPoint = d;
-                minOverlap = overlap;
-                minArea = rec[0].area() + rec[2].area();
-            } else if (overlap == minOverlap) {
-                double area = rec[0].area() + rec[2].area();
-                if (area < minArea) {
-                    splitPoint = d;
-                    minArea = area;
-                }
-            }
-        }
-        int startIndex, endIndex;
-        if (splitPoint < (getTupleCount() + 1) / 2) {
-            startIndex = 0;
-            endIndex = splitPoint;
-        } else {
-            startIndex = splitPoint;
-            endIndex = (getTupleCount() + 1);
-        }
-        boolean tupleInserted = false;
-        int totalBytes = 0, numOfDeletedTuples = 0;
-        for (int i = startIndex; i < endIndex; i++) {
-            if (tupleEntries1.get(i).getTupleIndex() != -1) {
-                frameTuple.resetByTupleIndex(this, tupleEntries1.get(i).getTupleIndex());
-                rightFrame.insert(frameTuple, -1);
-                ((UnorderedSlotManager) slotManager).modifySlot(
-                        slotManager.getSlotOff(tupleEntries1.get(i).getTupleIndex()), -1);
-                totalBytes += getTupleSize(frameTuple);
-                numOfDeletedTuples++;
-            } else {
-                rightFrame.insert(tuple, -1);
-                tupleInserted = true;
-            }
-        }
-
-        ((UnorderedSlotManager) slotManager).deleteEmptySlots();
-
-        // maintain space information
-        buf.putInt(totalFreeSpaceOff, buf.getInt(totalFreeSpaceOff) + totalBytes
-                + (slotManager.getSlotSize() * numOfDeletedTuples));
-
-        // compact both pages
-        rightFrame.compact();
-        compact();
-
-        if (!tupleInserted) {
-            insert(tuple, -1);
-        }
-
-        int tupleOff = slotManager.getTupleOff(slotManager.getSlotEndOff());
-        frameTuple.resetByTupleOffset(buf, tupleOff);
-        int splitKeySize = tupleWriter.bytesRequired(frameTuple, 0, keyValueProviders.length);
-
-        splitKey.initData(splitKeySize);
-        this.adjustMBR();
-        rTreeTupleWriterLeftFrame.writeTupleFields(getTuples(), 0, rTreeSplitKey.getLeftPageBuffer(), 0);
-        rTreeSplitKey.getLeftTuple().resetByTupleOffset(rTreeSplitKey.getLeftPageBuffer(), 0);
-
-        ((IRTreeFrame) rightFrame).adjustMBR();
-        rTreeTupleWriterRightFrame.writeTupleFields(((RTreeNSMFrame) rightFrame).getTuples(), 0,
-                rTreeSplitKey.getRightPageBuffer(), 0);
-        rTreeSplitKey.getRightTuple().resetByTupleOffset(rTreeSplitKey.getRightPageBuffer(), 0);
-
-        tupleEntries1.clear();
-        tupleEntries2.clear();
+    public void split(ITreeIndexFrame rightFrame, ITupleReference tuple, ISplitKey splitKey) {
+        rtreePolicy.split(this, buf, rightFrame, slotManager, frameTuple, tuple, splitKey);
     }
 
     abstract public int getTupleSize(ITupleReference tuple);
 
-    public void generateDist(ITupleReference tuple, TupleEntryArrayList entries, Rectangle rec, int start, int end) {
-        int j = 0;
-        while (entries.get(j).getTupleIndex() == -1) {
-            j++;
-        }
-        frameTuple.resetByTupleIndex(this, entries.get(j).getTupleIndex());
-        rec.set(frameTuple, keyValueProviders);
-        for (int i = start; i < end; ++i) {
-            if (i != j) {
-                if (entries.get(i).getTupleIndex() != -1) {
-                    frameTuple.resetByTupleIndex(this, entries.get(i).getTupleIndex());
-                    rec.enlarge(frameTuple, keyValueProviders);
-                } else {
-                    rec.enlarge(tuple, keyValueProviders);
-                }
-            }
-        }
-    }
-
     public void adjustMBRImpl(ITreeIndexTupleReference[] tuples) {
         int maxFieldPos = keyValueProviders.length / 2;
         for (int i = 1; i < getTupleCount(); i++) {
@@ -328,6 +151,11 @@
 
     @Override
     public int getPageHeaderSize() {
-        return rightPageOff;
+        return rightPageOff + 4;
+    }
+
+    @Override
+    public void setMultiComparator(MultiComparator cmp) {
+        // currently, R-Tree Frames are unsorted
     }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMInteriorFrame.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMInteriorFrame.java
index 63387ef..5ab9632 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMInteriorFrame.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMInteriorFrame.java
@@ -31,7 +31,6 @@
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.SlotOffTupleOff;
 import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeInteriorFrame;
-import edu.uci.ics.hyracks.storage.am.rtree.impls.EntriesOrder;
 import edu.uci.ics.hyracks.storage.am.rtree.impls.PathList;
 
 public class RTreeNSMInteriorFrame extends RTreeNSMFrame implements IRTreeInteriorFrame {
@@ -41,109 +40,24 @@
             .createBinaryComparator();
     private final int keyFieldCount;
 
-    public RTreeNSMInteriorFrame(ITreeIndexTupleWriter tupleWriter, IPrimitiveValueProvider[] keyValueProviders) {
-        super(tupleWriter, keyValueProviders);
+    public RTreeNSMInteriorFrame(ITreeIndexTupleWriter tupleWriter, IPrimitiveValueProvider[] keyValueProviders,
+            RTreePolicyType rtreePolicyType) {
+        super(tupleWriter, keyValueProviders, rtreePolicyType);
         keyFieldCount = keyValueProviders.length;
         frameTuple.setFieldCount(keyFieldCount);
     }
 
     @Override
-    public boolean findBestChild(ITupleReference tuple, MultiComparator cmp) {
-        cmpFrameTuple.setFieldCount(cmp.getKeyFieldCount());
-        frameTuple.setFieldCount(cmp.getKeyFieldCount());
-
-        int bestChild = 0;
-        double minEnlargedArea = Double.MAX_VALUE;
-
-        // the children pointers in the node point to leaves
-        if (getLevel() == 1) {
-            // find least overlap enlargement, use minimum enlarged area to
-            // break tie, if tie still exists use minimum area to break it
-            for (int i = 0; i < getTupleCount(); ++i) {
-                frameTuple.resetByTupleIndex(this, i);
-                double enlargedArea = enlargedArea(frameTuple, tuple, cmp);
-                tupleEntries1.add(i, enlargedArea);
-                if (enlargedArea < minEnlargedArea) {
-                    minEnlargedArea = enlargedArea;
-                    bestChild = i;
-                }
-            }
-            if (minEnlargedArea < RTreeNSMFrame.doubleEpsilon() || minEnlargedArea > RTreeNSMFrame.doubleEpsilon()) {
-                minEnlargedArea = Double.MAX_VALUE;
-                int k;
-                if (getTupleCount() > nearMinimumOverlapFactor) {
-                    // sort the entries based on their area enlargement needed
-                    // to include the object
-                    tupleEntries1.sort(EntriesOrder.ASCENDING, getTupleCount());
-                    k = nearMinimumOverlapFactor;
-                } else {
-                    k = getTupleCount();
-                }
-
-                double minOverlap = Double.MAX_VALUE;
-                int id = 0;
-                for (int i = 0; i < k; ++i) {
-                    double difference = 0.0;
-                    for (int j = 0; j < getTupleCount(); ++j) {
-                        frameTuple.resetByTupleIndex(this, j);
-                        cmpFrameTuple.resetByTupleIndex(this, tupleEntries1.get(i).getTupleIndex());
-
-                        int c = pointerCmp(frameTuple, cmpFrameTuple, cmp);
-                        if (c != 0) {
-                            double intersection = overlappedArea(frameTuple, tuple, cmpFrameTuple, cmp);
-                            if (intersection != 0.0) {
-                                difference += intersection - overlappedArea(frameTuple, null, cmpFrameTuple, cmp);
-                            }
-                        } else {
-                            id = j;
-                        }
-                    }
-
-                    double enlargedArea = enlargedArea(cmpFrameTuple, tuple, cmp);
-                    if (difference < minOverlap) {
-                        minOverlap = difference;
-                        minEnlargedArea = enlargedArea;
-                        bestChild = id;
-                    } else if (difference == minOverlap) {
-                        if (enlargedArea < minEnlargedArea) {
-                            minEnlargedArea = enlargedArea;
-                            bestChild = id;
-                        } else if (enlargedArea == minEnlargedArea) {
-                            double area = area(cmpFrameTuple, cmp);
-                            frameTuple.resetByTupleIndex(this, bestChild);
-                            double minArea = area(frameTuple, cmp);
-                            if (area < minArea) {
-                                bestChild = id;
-                            }
-                        }
-                    }
-                }
-            }
-        } else { // find minimum enlarged area, use minimum area to break tie
-            for (int i = 0; i < getTupleCount(); i++) {
-                frameTuple.resetByTupleIndex(this, i);
-                double enlargedArea = enlargedArea(frameTuple, tuple, cmp);
-                if (enlargedArea < minEnlargedArea) {
-                    minEnlargedArea = enlargedArea;
-                    bestChild = i;
-                } else if (enlargedArea == minEnlargedArea) {
-                    double area = area(frameTuple, cmp);
-                    frameTuple.resetByTupleIndex(this, bestChild);
-                    double minArea = area(frameTuple, cmp);
-                    if (area < minArea) {
-                        bestChild = i;
-                    }
-                }
-            }
-        }
-        tupleEntries1.clear();
-
+    public int findBestChild(ITupleReference tuple, MultiComparator cmp) {
+        int bestChild = rtreePolicy.findBestChildPosition(this, tuple, frameTuple, cmp);
         frameTuple.resetByTupleIndex(this, bestChild);
-        if (minEnlargedArea > 0.0) {
-            return true;
-        } else {
-            return false;
-        }
+        return buf.getInt(getChildPointerOff(frameTuple));
+    }
+
+    // frameTuple is assumed to have the tuple to be tested against.
+    @Override
+    public boolean checkIfEnlarementIsNeeded(ITupleReference tuple, MultiComparator cmp) {
+        return !RTreeComputationUtils.containsRegion(frameTuple, tuple, cmp, keyValueProviders);
     }
 
     @Override
@@ -154,11 +68,6 @@
     }
 
     @Override
-    public int getBestChildPageId() {
-        return buf.getInt(getChildPointerOff(frameTuple));
-    }
-
-    @Override
     public int findTupleByPointer(ITupleReference tuple, MultiComparator cmp) {
         frameTuple.setFieldCount(cmp.getKeyFieldCount());
         for (int i = 0; i < getTupleCount(); i++) {
@@ -279,7 +188,7 @@
 
     }
 
-    private int pointerCmp(ITupleReference tupleA, ITupleReference tupleB, MultiComparator cmp) {
+    protected int pointerCmp(ITupleReference tupleA, ITupleReference tupleB, MultiComparator cmp) {
         return childPtrCmp
                 .compare(tupleA.getFieldData(cmp.getKeyFieldCount() - 1), getChildPointerOff(tupleA), childPtrSize,
                         tupleB.getFieldData(cmp.getKeyFieldCount() - 1), getChildPointerOff(tupleB), childPtrSize);
@@ -330,143 +239,6 @@
     }
 
     @Override
-    public boolean recomputeMBR(ITupleReference tuple, int tupleIndex, MultiComparator cmp) {
-        frameTuple.setFieldCount(cmp.getKeyFieldCount());
-        frameTuple.resetByTupleIndex(this, tupleIndex);
-
-        int maxFieldPos = cmp.getKeyFieldCount() / 2;
-        for (int i = 0; i < maxFieldPos; i++) {
-            int j = maxFieldPos + i;
-            int c = cmp.getComparators()[i].compare(frameTuple.getFieldData(i), frameTuple.getFieldStart(i),
-                    frameTuple.getFieldLength(i), tuple.getFieldData(i), tuple.getFieldStart(i),
-                    tuple.getFieldLength(i));
-            if (c != 0) {
-                return true;
-            }
-            c = cmp.getComparators()[j].compare(frameTuple.getFieldData(j), frameTuple.getFieldStart(j),
-                    frameTuple.getFieldLength(j), tuple.getFieldData(j), tuple.getFieldStart(j),
-                    tuple.getFieldLength(j));
-
-            if (c != 0) {
-                return true;
-            }
-        }
-        return false;
-    }
-
-    private double overlappedArea(ITupleReference tuple1, ITupleReference tupleToBeInserted, ITupleReference tuple2,
-            MultiComparator cmp) {
-        double area = 1.0;
-        double f1, f2;
-
-        int maxFieldPos = cmp.getKeyFieldCount() / 2;
-        for (int i = 0; i < maxFieldPos; i++) {
-            int j = maxFieldPos + i;
-            double pHigh1, pLow1;
-            if (tupleToBeInserted != null) {
-                int c = cmp.getComparators()[i].compare(tuple1.getFieldData(i), tuple1.getFieldStart(i),
-                        tuple1.getFieldLength(i), tupleToBeInserted.getFieldData(i),
-                        tupleToBeInserted.getFieldStart(i), tupleToBeInserted.getFieldLength(i));
-                if (c < 0) {
-                    pLow1 = keyValueProviders[i].getValue(tuple1.getFieldData(i), tuple1.getFieldStart(i));
-                } else {
-                    pLow1 = keyValueProviders[i].getValue(tupleToBeInserted.getFieldData(i),
-                            tupleToBeInserted.getFieldStart(i));
-                }
-
-                c = cmp.getComparators()[j].compare(tuple1.getFieldData(j), tuple1.getFieldStart(j),
-                        tuple1.getFieldLength(j), tupleToBeInserted.getFieldData(j),
-                        tupleToBeInserted.getFieldStart(j), tupleToBeInserted.getFieldLength(j));
-                if (c > 0) {
-                    pHigh1 = keyValueProviders[j].getValue(tuple1.getFieldData(j), tuple1.getFieldStart(j));
-                } else {
-                    pHigh1 = keyValueProviders[j].getValue(tupleToBeInserted.getFieldData(j),
-                            tupleToBeInserted.getFieldStart(j));
-                }
-            } else {
-                pLow1 = keyValueProviders[i].getValue(tuple1.getFieldData(i), tuple1.getFieldStart(i));
-                pHigh1 = keyValueProviders[j].getValue(tuple1.getFieldData(j), tuple1.getFieldStart(j));
-            }
-
-            double pLow2 = keyValueProviders[i].getValue(tuple2.getFieldData(i), tuple2.getFieldStart(i));
-            double pHigh2 = keyValueProviders[j].getValue(tuple2.getFieldData(j), tuple2.getFieldStart(j));
-
-            if (pLow1 > pHigh2 || pHigh1 < pLow2) {
-                return 0.0;
-            }
-
-            f1 = Math.max(pLow1, pLow2);
-            f2 = Math.min(pHigh1, pHigh2);
-            area *= f2 - f1;
-        }
-        return area;
-    }
-
-    private double enlargedArea(ITupleReference tuple, ITupleReference tupleToBeInserted, MultiComparator cmp) {
-        double areaBeforeEnlarge = area(tuple, cmp);
-        double areaAfterEnlarge = 1.0;
-
-        int maxFieldPos = cmp.getKeyFieldCount() / 2;
-        for (int i = 0; i < maxFieldPos; i++) {
-            int j = maxFieldPos + i;
-            double pHigh, pLow;
-            int c = cmp.getComparators()[i].compare(tuple.getFieldData(i), tuple.getFieldStart(i),
-                    tuple.getFieldLength(i), tupleToBeInserted.getFieldData(i), tupleToBeInserted.getFieldStart(i),
-                    tupleToBeInserted.getFieldLength(i));
-            if (c < 0) {
-                pLow = keyValueProviders[i].getValue(tuple.getFieldData(i), tuple.getFieldStart(i));
-            } else {
-                pLow = keyValueProviders[i].getValue(tupleToBeInserted.getFieldData(i),
-                        tupleToBeInserted.getFieldStart(i));
-            }
-
-            c = cmp.getComparators()[j].compare(tuple.getFieldData(j), tuple.getFieldStart(j), tuple.getFieldLength(j),
-                    tupleToBeInserted.getFieldData(j), tupleToBeInserted.getFieldStart(j),
-                    tupleToBeInserted.getFieldLength(j));
-            if (c > 0) {
-                pHigh = keyValueProviders[j].getValue(tuple.getFieldData(j), tuple.getFieldStart(j));
-            } else {
-                pHigh = keyValueProviders[j].getValue(tupleToBeInserted.getFieldData(j),
-                        tupleToBeInserted.getFieldStart(j));
-            }
-            areaAfterEnlarge *= pHigh - pLow;
-        }
-        return areaAfterEnlarge - areaBeforeEnlarge;
-    }
-
-    private double area(ITupleReference tuple, MultiComparator cmp) {
-        double area = 1.0;
-        int maxFieldPos = cmp.getKeyFieldCount() / 2;
-        for (int i = 0; i < maxFieldPos; i++) {
-            int j = maxFieldPos + i;
-            area *= keyValueProviders[j].getValue(tuple.getFieldData(j), tuple.getFieldStart(j))
-                    - keyValueProviders[i].getValue(tuple.getFieldData(i), tuple.getFieldStart(i));
-        }
-        return area;
-    }
-
-    @Override
-    public boolean checkEnlargement(ITupleReference tuple, MultiComparator cmp) {
-        int maxFieldPos = cmp.getKeyFieldCount() / 2;
-        for (int i = 0; i < maxFieldPos; i++) {
-            int j = maxFieldPos + i;
-            int c = cmp.getComparators()[i].compare(frameTuple.getFieldData(i), frameTuple.getFieldStart(i),
-                    frameTuple.getFieldLength(i), tuple.getFieldData(i), tuple.getFieldStart(i),
-                    tuple.getFieldLength(i));
-            if (c > 0) {
-                return true;
-            }
-            c = cmp.getComparators()[j].compare(frameTuple.getFieldData(j), frameTuple.getFieldStart(j),
-                    frameTuple.getFieldLength(j), tuple.getFieldData(j), tuple.getFieldStart(j),
-                    tuple.getFieldLength(j));
-            if (c < 0) {
-                return true;
-            }
-        }
-        return false;
-    }
-
-    @Override
     public void enlarge(ITupleReference tuple, MultiComparator cmp) {
         int maxFieldPos = cmp.getKeyFieldCount() / 2;
         for (int i = 0; i < maxFieldPos; i++) {
@@ -509,4 +281,8 @@
     public int getFieldCount() {
         return keyValueProviders.length;
     }
+
+    public int getChildPointerSize() {
+        return childPtrSize;
+    }
 }
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMInteriorFrameFactory.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMInteriorFrameFactory.java
index 943a179..fdb0e0a 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMInteriorFrameFactory.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMInteriorFrameFactory.java
@@ -26,13 +26,16 @@
     private static final long serialVersionUID = 1L;
     private final ITreeIndexTupleWriterFactory tupleWriterFactory;
     private final IPrimitiveValueProviderFactory[] keyValueProviderFactories;
+    private final RTreePolicyType rtreePolicyType;
 
-    public RTreeNSMInteriorFrameFactory(ITreeIndexTupleWriterFactory tupleWriterFactory, IPrimitiveValueProviderFactory[] keyValueProviderFactories) {
+    public RTreeNSMInteriorFrameFactory(ITreeIndexTupleWriterFactory tupleWriterFactory,
+            IPrimitiveValueProviderFactory[] keyValueProviderFactories, RTreePolicyType rtreePolicyType) {
         this.tupleWriterFactory = tupleWriterFactory;
         if (keyValueProviderFactories.length % 2 != 0) {
             throw new IllegalArgumentException("The key has different number of dimensions.");
         }
         this.keyValueProviderFactories = keyValueProviderFactories;
+        this.rtreePolicyType = rtreePolicyType;
     }
 
     @Override
@@ -41,11 +44,11 @@
         for (int i = 0; i < keyValueProviders.length; i++) {
             keyValueProviders[i] = keyValueProviderFactories[i].createPrimitiveValueProvider();
         }
-        return new RTreeNSMInteriorFrame(tupleWriterFactory.createTupleWriter(), keyValueProviders);
+        return new RTreeNSMInteriorFrame(tupleWriterFactory.createTupleWriter(), keyValueProviders, rtreePolicyType);
     }
 
-	@Override
-	public ITreeIndexTupleWriterFactory getTupleWriterFactory() {
-		return tupleWriterFactory;
-	}
+    @Override
+    public ITreeIndexTupleWriterFactory getTupleWriterFactory() {
+        return tupleWriterFactory;
+    }
 }
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMLeafFrame.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMLeafFrame.java
index f1d71ff..d52ef16 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMLeafFrame.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMLeafFrame.java
@@ -24,8 +24,9 @@
 
 public class RTreeNSMLeafFrame extends RTreeNSMFrame implements IRTreeLeafFrame {
 
-    public RTreeNSMLeafFrame(ITreeIndexTupleWriter tupleWriter, IPrimitiveValueProvider[] keyValueProviders) {
-        super(tupleWriter, keyValueProviders);
+    public RTreeNSMLeafFrame(ITreeIndexTupleWriter tupleWriter, IPrimitiveValueProvider[] keyValueProviders,
+            RTreePolicyType rtreePolicyType) {
+        super(tupleWriter, keyValueProviders, rtreePolicyType);
     }
 
     @Override
@@ -96,4 +97,19 @@
     public int getFieldCount() {
         return frameTuple.getFieldCount();
     }
+
+    public ITupleReference getBeforeTuple(ITupleReference tuple, int targetTupleIndex, MultiComparator cmp) {
+        // Examine the tuple index to determine whether it is valid or not.
+        if (targetTupleIndex != slotManager.getGreatestKeyIndicator()) {
+            // We need to check the key to determine whether it's an insert or an update.
+            frameTuple.resetByTupleIndex(this, targetTupleIndex);
+            if (cmp.compare(tuple, frameTuple) == 0) {
+                // The keys match, it's an update.
+                return frameTuple;
+            }
+        }
+        // Either the tuple index is a special indicator, or the keys don't match.
+        // In those cases, we are definitely dealing with an insert.
+        return null;
+    }
 }
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMLeafFrameFactory.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMLeafFrameFactory.java
index e31148f..b4d382b 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMLeafFrameFactory.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMLeafFrameFactory.java
@@ -26,13 +26,16 @@
     private static final long serialVersionUID = 1L;
     private final ITreeIndexTupleWriterFactory tupleWriterFactory;
     private final IPrimitiveValueProviderFactory[] keyValueProviderFactories;
+    private final RTreePolicyType rtreePolicyType;
 
-    public RTreeNSMLeafFrameFactory(ITreeIndexTupleWriterFactory tupleWriterFactory, IPrimitiveValueProviderFactory[] keyValueProviderFactories) {
+    public RTreeNSMLeafFrameFactory(ITreeIndexTupleWriterFactory tupleWriterFactory,
+            IPrimitiveValueProviderFactory[] keyValueProviderFactories, RTreePolicyType rtreePolicyType) {
         this.tupleWriterFactory = tupleWriterFactory;
         if (keyValueProviderFactories.length % 2 != 0) {
             throw new IllegalArgumentException("The key has different number of dimensions.");
         }
         this.keyValueProviderFactories = keyValueProviderFactories;
+        this.rtreePolicyType = rtreePolicyType;
     }
 
     @Override
@@ -41,11 +44,11 @@
         for (int i = 0; i < keyValueProviders.length; i++) {
             keyValueProviders[i] = keyValueProviderFactories[i].createPrimitiveValueProvider();
         }
-        return new RTreeNSMLeafFrame(tupleWriterFactory.createTupleWriter(), keyValueProviders);
+        return new RTreeNSMLeafFrame(tupleWriterFactory.createTupleWriter(), keyValueProviders, rtreePolicyType);
     }
 
-	@Override
-	public ITreeIndexTupleWriterFactory getTupleWriterFactory() {
-		return tupleWriterFactory;
-	}
+    @Override
+    public ITreeIndexTupleWriterFactory getTupleWriterFactory() {
+        return tupleWriterFactory;
+    }
 }
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreePolicy.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreePolicy.java
new file mode 100644
index 0000000..9d94794
--- /dev/null
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreePolicy.java
@@ -0,0 +1,232 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.rtree.frames;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.ISlotManager;
+import edu.uci.ics.hyracks.storage.am.common.api.ISplitKey;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleWriter;
+import edu.uci.ics.hyracks.storage.am.common.frames.FrameOpSpaceStatus;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeFrame;
+import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreePolicy;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTreeSplitKey;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.Rectangle;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.UnorderedSlotManager;
+import edu.uci.ics.hyracks.storage.am.rtree.tuples.RTreeTypeAwareTupleWriter;
+
+public class RTreePolicy implements IRTreePolicy {
+
+    private Rectangle[] rec;
+
+    private final ITreeIndexTupleWriter tupleWriter;
+    private final IPrimitiveValueProvider[] keyValueProviders;
+    private ITreeIndexTupleReference cmpFrameTuple;
+    private final int totalFreeSpaceOff;
+
+    public RTreePolicy(ITreeIndexTupleWriter tupleWriter, IPrimitiveValueProvider[] keyValueProviders,
+            ITreeIndexTupleReference cmpFrameTuple, int totalFreeSpaceOff) {
+        this.tupleWriter = tupleWriter;
+        this.keyValueProviders = keyValueProviders;
+        this.cmpFrameTuple = cmpFrameTuple;
+        this.totalFreeSpaceOff = totalFreeSpaceOff;
+
+        rec = new Rectangle[2];
+        for (int i = 0; i < 2; i++) {
+            rec[i] = new Rectangle(keyValueProviders.length / 2);
+        }
+    }
+
+    @Override
+    public void split(ITreeIndexFrame leftFrame, ByteBuffer buf, ITreeIndexFrame rightFrame, ISlotManager slotManager,
+            ITreeIndexTupleReference frameTuple, ITupleReference tuple, ISplitKey splitKey) {
+        RTreeSplitKey rTreeSplitKey = ((RTreeSplitKey) splitKey);
+        RTreeTypeAwareTupleWriter rTreeTupleWriterLeftFrame = ((RTreeTypeAwareTupleWriter) tupleWriter);
+        RTreeTypeAwareTupleWriter rTreeTupleWriterRightFrame = ((RTreeTypeAwareTupleWriter) rightFrame.getTupleWriter());
+
+        RTreeNSMFrame leftRTreeFrame = ((RTreeNSMFrame) leftFrame);
+
+        double separation = Double.NEGATIVE_INFINITY;
+        int seed1 = 0, seed2 = 0;
+        int maxFieldPos = keyValueProviders.length / 2;
+        for (int i = 0; i < maxFieldPos; i++) {
+            int j = maxFieldPos + i;
+            frameTuple.resetByTupleIndex(leftRTreeFrame, 0);
+            double leastLowerValue = keyValueProviders[i].getValue(frameTuple.getFieldData(i),
+                    frameTuple.getFieldStart(i));
+            double greatestUpperValue = keyValueProviders[j].getValue(frameTuple.getFieldData(j),
+                    frameTuple.getFieldStart(j));
+            double leastUpperValue = leastLowerValue;
+            double greatestLowerValue = greatestUpperValue;
+            int leastUpperIndex = 0;
+            int greatestLowerIndex = 0;
+            double width;
+
+            int tupleCount = leftRTreeFrame.getTupleCount();
+            for (int k = 1; k < tupleCount; ++k) {
+                frameTuple.resetByTupleIndex(leftRTreeFrame, k);
+                double lowerValue = keyValueProviders[i].getValue(frameTuple.getFieldData(i),
+                        frameTuple.getFieldStart(i));
+                if (lowerValue > greatestLowerValue) {
+                    greatestLowerIndex = k;
+                    cmpFrameTuple.resetByTupleIndex(leftRTreeFrame, k);
+                    greatestLowerValue = keyValueProviders[i].getValue(cmpFrameTuple.getFieldData(i),
+                            cmpFrameTuple.getFieldStart(i));
+                }
+                double higherValue = keyValueProviders[j].getValue(frameTuple.getFieldData(j),
+                        frameTuple.getFieldStart(j));
+                if (higherValue < leastUpperValue) {
+                    leastUpperIndex = k;
+                    cmpFrameTuple.resetByTupleIndex(leftRTreeFrame, k);
+                    leastUpperValue = keyValueProviders[j].getValue(cmpFrameTuple.getFieldData(j),
+                            cmpFrameTuple.getFieldStart(j));
+                }
+
+                leastLowerValue = Math.min(lowerValue, leastLowerValue);
+                greatestUpperValue = Math.max(higherValue, greatestUpperValue);
+            }
+
+            width = greatestUpperValue - leastLowerValue;
+            if (width <= 0) {
+                width = 1;
+            }
+
+            double f = (greatestLowerValue - leastUpperValue) / width;
+
+            if (f > separation) {
+                seed1 = leastUpperIndex;
+                seed2 = greatestLowerIndex;
+                separation = f;
+            }
+        }
+
+        if (seed1 == seed2) {
+            if (seed1 == 0) {
+                seed2 = 1;
+            } else {
+                --seed2;
+            }
+        }
+
+        int totalBytes = 0, numOfDeletedTuples = 0;
+
+        frameTuple.resetByTupleIndex(leftRTreeFrame, seed1);
+        rec[0].set(frameTuple, keyValueProviders);
+        rightFrame.insert(frameTuple, -1);
+        ((UnorderedSlotManager) slotManager).modifySlot(slotManager.getSlotOff(seed1), -1);
+        totalBytes += leftRTreeFrame.getTupleSize(frameTuple);
+        numOfDeletedTuples++;
+
+        frameTuple.resetByTupleIndex(leftRTreeFrame, seed2);
+        rec[1].set(frameTuple, keyValueProviders);
+
+        int remainingTuplestoBeInsertedInRightFrame;
+        for (int k = 0; k < leftRTreeFrame.getTupleCount(); ++k) {
+            remainingTuplestoBeInsertedInRightFrame = leftRTreeFrame.getTupleCount() / 2 - rightFrame.getTupleCount();
+            if (remainingTuplestoBeInsertedInRightFrame == 0) {
+                break;
+            }
+            if (k != seed1 && k != seed2) {
+                frameTuple.resetByTupleIndex(leftRTreeFrame, k);
+                if (rec[0].enlargedArea(frameTuple, keyValueProviders) < rec[1].enlargedArea(frameTuple,
+                        keyValueProviders)
+                        || leftRTreeFrame.getTupleCount() - k <= remainingTuplestoBeInsertedInRightFrame) {
+                    rightFrame.insert(frameTuple, -1);
+                    rec[0].enlarge(frameTuple, keyValueProviders);
+                    ((UnorderedSlotManager) slotManager).modifySlot(slotManager.getSlotOff(k), -1);
+                    totalBytes += leftRTreeFrame.getTupleSize(frameTuple);
+                    numOfDeletedTuples++;
+                } else {
+                    rec[1].enlarge(frameTuple, keyValueProviders);
+                }
+            }
+
+        }
+
+        ((UnorderedSlotManager) slotManager).deleteEmptySlots();
+
+        // maintain space information
+        buf.putInt(totalFreeSpaceOff, buf.getInt(totalFreeSpaceOff) + totalBytes
+                + (slotManager.getSlotSize() * numOfDeletedTuples));
+
+        // compact both pages
+        rightFrame.compact();
+        leftRTreeFrame.compact();
+
+        // The assumption here is that the new tuple cannot be larger than page
+        // size, thus it must fit in either pages.
+        if (rec[0].enlargedArea(tuple, keyValueProviders) < rec[1].enlargedArea(tuple, keyValueProviders)) {
+            if (rightFrame.hasSpaceInsert(tuple) == FrameOpSpaceStatus.SUFFICIENT_CONTIGUOUS_SPACE) {
+                rightFrame.insert(tuple, -1);
+            } else {
+                leftRTreeFrame.insert(tuple, -1);
+            }
+        } else if (leftRTreeFrame.hasSpaceInsert(tuple) == FrameOpSpaceStatus.SUFFICIENT_CONTIGUOUS_SPACE) {
+            leftRTreeFrame.insert(tuple, -1);
+        } else {
+            rightFrame.insert(tuple, -1);
+        }
+
+        int tupleOff = slotManager.getTupleOff(slotManager.getSlotEndOff());
+        frameTuple.resetByTupleOffset(buf, tupleOff);
+        int splitKeySize = tupleWriter.bytesRequired(frameTuple, 0, keyValueProviders.length);
+
+        splitKey.initData(splitKeySize);
+        leftRTreeFrame.adjustMBR();
+        rTreeTupleWriterLeftFrame.writeTupleFields(leftRTreeFrame.getTuples(), 0, rTreeSplitKey.getLeftPageBuffer(), 0);
+        rTreeSplitKey.getLeftTuple().resetByTupleOffset(rTreeSplitKey.getLeftPageBuffer(), 0);
+
+        ((IRTreeFrame) rightFrame).adjustMBR();
+        rTreeTupleWriterRightFrame.writeTupleFields(((RTreeNSMFrame) rightFrame).getTuples(), 0,
+                rTreeSplitKey.getRightPageBuffer(), 0);
+        rTreeSplitKey.getRightTuple().resetByTupleOffset(rTreeSplitKey.getRightPageBuffer(), 0);
+    }
+
+    @Override
+    public int findBestChildPosition(ITreeIndexFrame frame, ITupleReference tuple, ITreeIndexTupleReference frameTuple,
+            MultiComparator cmp) {
+        cmpFrameTuple.setFieldCount(cmp.getKeyFieldCount());
+        frameTuple.setFieldCount(cmp.getKeyFieldCount());
+
+        int bestChild = 0;
+        double minEnlargedArea = Double.MAX_VALUE;
+
+        // find minimum enlarged area, use minimum area to break tie
+        for (int i = 0; i < frame.getTupleCount(); i++) {
+            frameTuple.resetByTupleIndex(frame, i);
+            double enlargedArea = RTreeComputationUtils.enlargedArea(frameTuple, tuple, cmp, keyValueProviders);
+            if (enlargedArea < minEnlargedArea) {
+                minEnlargedArea = enlargedArea;
+                bestChild = i;
+            } else if (enlargedArea == minEnlargedArea) {
+                double area = RTreeComputationUtils.area(frameTuple, cmp, keyValueProviders);
+                frameTuple.resetByTupleIndex(frame, bestChild);
+                double minArea = RTreeComputationUtils.area(frameTuple, cmp, keyValueProviders);
+                if (area < minArea) {
+                    bestChild = i;
+                }
+            }
+        }
+
+        return bestChild;
+    }
+
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreePolicyType.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreePolicyType.java
new file mode 100644
index 0000000..712c424
--- /dev/null
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreePolicyType.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.rtree.frames;
+
+public enum RTreePolicyType {
+    RTREE, RSTARTREE
+}
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTree.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTree.java
index cc3cf5b..c12dc50 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTree.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTree.java
@@ -15,88 +15,64 @@
 
 package edu.uci.ics.hyracks.storage.am.rtree.impls;
 
+import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.concurrent.atomic.AtomicLong;
-import java.util.concurrent.locks.ReadWriteLock;
-import java.util.concurrent.locks.ReentrantReadWriteLock;
 
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoadContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexOpContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrame;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference;
 import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
-import edu.uci.ics.hyracks.storage.am.common.api.IndexType;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
 import edu.uci.ics.hyracks.storage.am.common.frames.FrameOpSpaceStatus;
-import edu.uci.ics.hyracks.storage.am.common.impls.TreeDiskOrderScanCursor;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOp;
+import edu.uci.ics.hyracks.storage.am.common.impls.AbstractTreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.impls.NodeFrontier;
+import edu.uci.ics.hyracks.storage.am.common.impls.TreeIndexDiskOrderScanCursor;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 import edu.uci.ics.hyracks.storage.am.common.util.TreeIndexUtils;
 import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeFrame;
 import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeInteriorFrame;
 import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeLeafFrame;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreeNSMFrame;
 import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreeNSMInteriorFrame;
+import edu.uci.ics.hyracks.storage.am.rtree.tuples.RTreeTypeAwareTupleWriter;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
 import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
-public class RTree implements ITreeIndex {
-
-    private final int rootPage = 1;
+public class RTree extends AbstractTreeIndex {
 
     // Global node sequence number used for the concurrency control protocol
     private final AtomicLong globalNsn;
-    private final ReadWriteLock treeLatch;
 
-    private final IFreePageManager freePageManager;
-    private final IBufferCache bufferCache;
-    private int fileId;
-
-    private final ITreeIndexFrameFactory interiorFrameFactory;
-    private final ITreeIndexFrameFactory leafFrameFactory;
-    private final int fieldCount;
-    private final IBinaryComparatorFactory[] cmpFactories;
-
-    public RTree(IBufferCache bufferCache, int fieldCount, IBinaryComparatorFactory[] cmpFactories,
-            IFreePageManager freePageManager, ITreeIndexFrameFactory interiorFrameFactory,
-            ITreeIndexFrameFactory leafFrameFactory) {
-        this.bufferCache = bufferCache;
-        this.fieldCount = fieldCount;
-        this.cmpFactories = cmpFactories;
-        this.freePageManager = freePageManager;
-        this.interiorFrameFactory = interiorFrameFactory;
-        this.leafFrameFactory = leafFrameFactory;
+    public RTree(IBufferCache bufferCache, IFileMapProvider fileMapProvider, IFreePageManager freePageManager,
+            ITreeIndexFrameFactory interiorFrameFactory, ITreeIndexFrameFactory leafFrameFactory,
+            IBinaryComparatorFactory[] cmpFactories, int fieldCount, FileReference file) {
+        super(bufferCache, fileMapProvider, freePageManager, interiorFrameFactory, leafFrameFactory, cmpFactories,
+                fieldCount, file);
         globalNsn = new AtomicLong();
-        this.treeLatch = new ReentrantReadWriteLock(true);
     }
 
     private long incrementGlobalNsn() {
         return globalNsn.incrementAndGet();
     }
 
-    public byte getTreeHeight(IRTreeLeafFrame leafFrame) throws HyracksDataException {
-        ICachedPage rootNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, rootPage), false);
-        rootNode.acquireReadLatch();
-        try {
-            leafFrame.setPage(rootNode);
-            return leafFrame.getLevel();
-        } finally {
-            rootNode.releaseReadLatch();
-            bufferCache.unpin(rootNode);
-        }
-    }
-
     @SuppressWarnings("rawtypes")
     public String printTree(IRTreeLeafFrame leafFrame, IRTreeInteriorFrame interiorFrame,
             ISerializerDeserializer[] keySerdes) throws Exception {
@@ -162,66 +138,21 @@
         }
     }
 
-    @Override
-    public void create(int fileId) throws HyracksDataException {
-        treeLatch.writeLock().lock();
-        try {
-            ITreeIndexFrame leafFrame = leafFrameFactory.createFrame();
-            ITreeIndexMetaDataFrame metaFrame = freePageManager.getMetaDataFrameFactory().createFrame();
-            freePageManager.open(fileId);
-            freePageManager.init(metaFrame, rootPage);
-
-            // initialize root page
-            ICachedPage rootNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, rootPage), true);
-
-            rootNode.acquireWriteLatch();
-            try {
-                leafFrame.setPage(rootNode);
-                leafFrame.initBuffer((byte) 0);
-            } finally {
-                rootNode.releaseWriteLatch();
-                bufferCache.unpin(rootNode);
-            }
-        } finally {
-            treeLatch.writeLock().unlock();
-        }
-    }
-
-    @Override
-    public void open(int fileId) {
-        this.fileId = fileId;
-        freePageManager.open(fileId);
-    }
-
-    @Override
-    public void close() {
-        fileId = -1;
-        freePageManager.close();
-    }
-
-    @Override
-    public int getFileId() {
-        return fileId;
-    }
-
-    @Override
-    public IBufferCache getBufferCache() {
-        return bufferCache;
-    }
-
-    private RTreeOpContext createOpContext() {
+    private RTreeOpContext createOpContext(IModificationOperationCallback modificationCallback) {
         return new RTreeOpContext((IRTreeLeafFrame) leafFrameFactory.createFrame(),
                 (IRTreeInteriorFrame) interiorFrameFactory.createFrame(), freePageManager.getMetaDataFrameFactory()
-                        .createFrame(), cmpFactories, 8);
+                        .createFrame(), cmpFactories, 8, modificationCallback);
     }
 
-    private void insert(ITupleReference tuple, IIndexOpContext ictx) throws HyracksDataException, TreeIndexException {
+    private void insert(ITupleReference tuple, IIndexOperationContext ictx) throws HyracksDataException,
+            TreeIndexException {
         RTreeOpContext ctx = (RTreeOpContext) ictx;
         ctx.reset();
         ctx.setTuple(tuple);
         ctx.splitKey.reset();
         ctx.splitKey.getLeftTuple().setFieldCount(cmpFactories.length);
         ctx.splitKey.getRightTuple().setFieldCount(cmpFactories.length);
+        ctx.modificationCallback.before(tuple);
 
         int maxFieldPos = cmpFactories.length / 2;
         for (int i = 0; i < maxFieldPos; i++) {
@@ -232,6 +163,7 @@
                 throw new IllegalArgumentException("The low key point has larger coordinates than the high key point.");
             }
         }
+
         try {
             ICachedPage leafNode = findLeaf(ctx);
 
@@ -323,9 +255,9 @@
                 ctx.pathList.add(pageId, pageLsn, -1);
 
                 if (!isLeaf) {
-                    // findBestChild must be called *before* getBestChildPageId
-                    boolean enlarementIsNeeded = ctx.interiorFrame.findBestChild(ctx.getTuple(), ctx.cmp);
-                    int childPageId = ctx.interiorFrame.getBestChildPageId();
+                    // findBestChild must be called *before* checkIfEnlarementIsNeeded
+                    int childPageId = ctx.interiorFrame.findBestChild(ctx.getTuple(), ctx.cmp);
+                    boolean enlarementIsNeeded = ctx.interiorFrame.checkIfEnlarementIsNeeded(ctx.getTuple(), ctx.cmp);
 
                     if (enlarementIsNeeded) {
                         if (!writeLatched) {
@@ -404,6 +336,7 @@
                     if (!isLeaf) {
                         ctx.interiorFrame.insert(tuple, -1);
                     } else {
+                        ctx.modificationCallback.found(null, tuple);
                         ctx.leafFrame.insert(tuple, -1);
                     }
                     succeeded = true;
@@ -428,6 +361,7 @@
                         ctx.interiorFrame.insert(tuple, -1);
                     } else {
                         ctx.leafFrame.compact();
+                        ctx.modificationCallback.found(null, tuple);
                         ctx.leafFrame.insert(tuple, -1);
                     }
                     succeeded = true;
@@ -464,6 +398,7 @@
                         rightFrame.setPage(rightNode);
                         rightFrame.initBuffer((byte) 0);
                         rightFrame.setRightPage(ctx.interiorFrame.getRightPage());
+                        ctx.modificationCallback.found(null, tuple);
                         ctx.leafFrame.split(rightFrame, tuple, ctx.splitKey);
                         ctx.leafFrame.setRightPage(rightPageId);
                     }
@@ -795,12 +730,14 @@
     }
 
     private void deleteTuple(int tupleIndex, RTreeOpContext ctx) throws HyracksDataException {
+        ITupleReference beforeTuple = ctx.leafFrame.getBeforeTuple(ctx.getTuple(), tupleIndex, ctx.cmp);
+        ctx.modificationCallback.found(beforeTuple, ctx.getTuple());
         ctx.leafFrame.delete(tupleIndex, ctx.cmp);
         ctx.leafFrame.setPageLsn(incrementGlobalNsn());
     }
 
     private void search(ITreeIndexCursor cursor, ISearchPredicate searchPred, RTreeOpContext ctx)
-            throws HyracksDataException, TreeIndexException {
+            throws HyracksDataException, IndexException {
         ctx.reset();
         ctx.cursor = cursor;
 
@@ -810,90 +747,18 @@
         ctx.cursor.open(ctx.cursorInitialState, (SearchPredicate) searchPred);
     }
 
-    @Override
-    public ITreeIndexFrameFactory getInteriorFrameFactory() {
-        return interiorFrameFactory;
-    }
-
-    @Override
-    public ITreeIndexFrameFactory getLeafFrameFactory() {
-        return leafFrameFactory;
-    }
-
-    @Override
-    public IBinaryComparatorFactory[] getComparatorFactories() {
-        return cmpFactories;
-    }
-
-    @Override
-    public IFreePageManager getFreePageManager() {
-        return freePageManager;
-    }
-
     private void update(ITupleReference tuple, RTreeOpContext ctx) {
         throw new UnsupportedOperationException("RTree Update not implemented.");
     }
 
-    public boolean isEmptyTree(IRTreeLeafFrame leafFrame) throws HyracksDataException {
-        ICachedPage rootNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, rootPage), false);
-        rootNode.acquireReadLatch();
-        try {
-            leafFrame.setPage(rootNode);
-            if (leafFrame.getLevel() == 0 && leafFrame.getTupleCount() == 0) {
-                return true;
-            } else {
-                return false;
-            }
-        } finally {
-            rootNode.releaseReadLatch();
-            bufferCache.unpin(rootNode);
-        }
-    }
-
-    public final class BulkLoadContext implements IIndexBulkLoadContext {
-
-        public ITreeIndexAccessor indexAccessor;
-
-        public BulkLoadContext(float fillFactor, IRTreeFrame leafFrame, IRTreeFrame interiorFrame,
-                ITreeIndexMetaDataFrame metaFrame) throws HyracksDataException {
-            indexAccessor = createAccessor();
-        }
-    }
-
-    @Override
-    public IIndexBulkLoadContext beginBulkLoad(float fillFactor) throws HyracksDataException {
-        IRTreeLeafFrame leafFrame = (IRTreeLeafFrame) leafFrameFactory.createFrame();
-        if (!isEmptyTree(leafFrame)) {
-            throw new HyracksDataException("Trying to Bulk-load a non-empty RTree.");
-        }
-
-        BulkLoadContext ctx = new BulkLoadContext(fillFactor, (IRTreeFrame) leafFrameFactory.createFrame(),
-                (IRTreeFrame) interiorFrameFactory.createFrame(), freePageManager.getMetaDataFrameFactory()
-                        .createFrame());
-        return ctx;
-    }
-
-    @Override
-    public void bulkLoadAddTuple(ITupleReference tuple, IIndexBulkLoadContext ictx) throws HyracksDataException {
-        try {
-            ((BulkLoadContext) ictx).indexAccessor.insert(tuple);
-        } catch (Exception e) {
-            throw new HyracksDataException("BulkLoad Error", e);
-        }
-    }
-
-    @Override
-    public void endBulkLoad(IIndexBulkLoadContext ictx) throws HyracksDataException {
-    }
-
     private void diskOrderScan(ITreeIndexCursor icursor, RTreeOpContext ctx) throws HyracksDataException {
-        TreeDiskOrderScanCursor cursor = (TreeDiskOrderScanCursor) icursor;
+        TreeIndexDiskOrderScanCursor cursor = (TreeIndexDiskOrderScanCursor) icursor;
         ctx.reset();
 
         MultiComparator cmp = MultiComparator.create(cmpFactories);
         SearchPredicate searchPred = new SearchPredicate(null, cmp);
 
-        int currentPageId = rootPage + 1;
+        int currentPageId = rootPage;
         int maxPageId = freePageManager.getMaxPage(ctx.metaFrame);
 
         ICachedPage page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, currentPageId), false);
@@ -903,6 +768,7 @@
             cursor.setFileId(fileId);
             cursor.setCurrentPageId(currentPageId);
             cursor.setMaxPageId(maxPageId);
+            ctx.cursorInitialState.setOriginialKeyComparator(ctx.cmp);
             ctx.cursorInitialState.setPage(page);
             cursor.open(ctx.cursorInitialState, searchPred);
         } catch (Exception e) {
@@ -913,49 +779,36 @@
     }
 
     @Override
-    public int getRootPageId() {
-        return rootPage;
-    }
-
-    @Override
-    public int getFieldCount() {
-        return fieldCount;
-    }
-
-    @Override
-    public IndexType getIndexType() {
-        return IndexType.RTREE;
-    }
-
-    @Override
-    public ITreeIndexAccessor createAccessor() {
-        return new RTreeAccessor(this);
+    public ITreeIndexAccessor createAccessor(IModificationOperationCallback modificationCallback,
+            ISearchOperationCallback searchCallback) {
+        return new RTreeAccessor(this, modificationCallback, searchCallback);
     }
 
     public class RTreeAccessor implements ITreeIndexAccessor {
         private RTree rtree;
         private RTreeOpContext ctx;
 
-        public RTreeAccessor(RTree rtree) {
+        public RTreeAccessor(RTree rtree, IModificationOperationCallback modificationCallback,
+                ISearchOperationCallback searchCallback) {
             this.rtree = rtree;
-            this.ctx = rtree.createOpContext();
+            this.ctx = rtree.createOpContext(modificationCallback);
         }
 
         @Override
         public void insert(ITupleReference tuple) throws HyracksDataException, TreeIndexException {
-            ctx.reset(IndexOp.INSERT);
+            ctx.setOperation(IndexOperation.INSERT);
             rtree.insert(tuple, ctx);
         }
 
         @Override
         public void update(ITupleReference tuple) throws HyracksDataException, TreeIndexException {
-            ctx.reset(IndexOp.UPDATE);
+            ctx.setOperation(IndexOperation.UPDATE);
             rtree.update(tuple, ctx);
         }
 
         @Override
         public void delete(ITupleReference tuple) throws HyracksDataException, TreeIndexException {
-            ctx.reset(IndexOp.DELETE);
+            ctx.setOperation(IndexOperation.DELETE);
             rtree.delete(tuple, ctx);
         }
 
@@ -968,18 +821,18 @@
         @Override
         public void search(IIndexCursor cursor, ISearchPredicate searchPred) throws HyracksDataException,
                 IndexException {
-            ctx.reset(IndexOp.SEARCH);
+            ctx.setOperation(IndexOperation.SEARCH);
             rtree.search((ITreeIndexCursor) cursor, searchPred, ctx);
         }
 
         @Override
         public ITreeIndexCursor createDiskOrderScanCursor() {
-            return new TreeDiskOrderScanCursor(leafFrameFactory.createFrame());
+            return new TreeIndexDiskOrderScanCursor(leafFrameFactory.createFrame());
         }
 
         @Override
         public void diskOrderScan(ITreeIndexCursor cursor) throws HyracksDataException {
-            ctx.reset(IndexOp.DISKORDERSCAN);
+            ctx.setOperation(IndexOperation.DISKORDERSCAN);
             rtree.diskOrderScan(cursor, ctx);
         }
 
@@ -990,7 +843,140 @@
         @Override
         public void upsert(ITupleReference tuple) throws HyracksDataException, TreeIndexException {
             throw new UnsupportedOperationException(
-                    "The RTree does not suypport the notion of keys, therefore upsert does not make sense.");
+                    "The RTree does not support the notion of keys, therefore upsert does not make sense.");
         }
     }
+
+    @Override
+    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
+            throws TreeIndexException {
+        // TODO: verifyInput currently does nothing.
+        try {
+            return new RTreeBulkLoader(fillFactor);
+        } catch (HyracksDataException e) {
+            throw new TreeIndexException(e);
+        }
+    }
+
+    public class RTreeBulkLoader extends AbstractTreeIndex.AbstractTreeIndexBulkLoader {
+        ITreeIndexFrame lowerFrame, prevInteriorFrame;
+        RTreeTypeAwareTupleWriter tupleWriter = ((RTreeTypeAwareTupleWriter) interiorFrame.getTupleWriter());
+        ITreeIndexTupleReference mbrTuple = interiorFrame.createTupleReference();
+        ByteBuffer mbr;
+
+        public RTreeBulkLoader(float fillFactor) throws TreeIndexException, HyracksDataException {
+            super(fillFactor);
+            prevInteriorFrame = interiorFrameFactory.createFrame();
+        }
+
+        @Override
+        public void add(ITupleReference tuple) throws HyracksDataException {
+            try {
+                NodeFrontier leafFrontier = nodeFrontiers.get(0);
+
+                int spaceNeeded = tupleWriter.bytesRequired(tuple) + slotSize;
+                int spaceUsed = leafFrame.getBuffer().capacity() - leafFrame.getTotalFreeSpace();
+
+                // try to free space by compression
+                if (spaceUsed + spaceNeeded > leafMaxBytes) {
+                    leafFrame.compress();
+                    spaceUsed = leafFrame.getBuffer().capacity() - leafFrame.getTotalFreeSpace();
+                }
+
+                if (spaceUsed + spaceNeeded > leafMaxBytes) {
+                    propagateBulk(1, false);
+
+                    leafFrontier.pageId = freePageManager.getFreePage(metaFrame);
+
+                    leafFrontier.page.releaseWriteLatch();
+                    bufferCache.unpin(leafFrontier.page);
+
+                    leafFrontier.page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, leafFrontier.pageId),
+                            true);
+                    leafFrontier.page.acquireWriteLatch();
+                    leafFrame.setPage(leafFrontier.page);
+                    leafFrame.initBuffer((byte) 0);
+                }
+
+                leafFrame.setPage(leafFrontier.page);
+                leafFrame.insert(tuple, -1);
+            } catch (HyracksDataException e) {
+                handleException();
+                throw e;
+            } catch (RuntimeException e) {
+                handleException();
+                throw e;
+            }
+
+        }
+
+        public void end() throws HyracksDataException {
+            propagateBulk(1, true);
+
+            super.end();
+        }
+
+        protected void propagateBulk(int level, boolean toRoot) throws HyracksDataException {
+            boolean propagated = false;
+
+            if (level == 1)
+                lowerFrame = leafFrame;
+
+            if (lowerFrame.getTupleCount() == 0)
+                return;
+
+            if (level >= nodeFrontiers.size())
+                addLevel();
+
+            ((RTreeNSMFrame) lowerFrame).adjustMBR();
+
+            if (mbr == null) {
+                int bytesRequired = tupleWriter.bytesRequired(((RTreeNSMFrame) lowerFrame).getTuples()[0], 0,
+                        cmp.getKeyFieldCount())
+                        + ((RTreeNSMInteriorFrame) interiorFrame).getChildPointerSize();
+                mbr = ByteBuffer.allocate(bytesRequired);
+            }
+            tupleWriter.writeTupleFields(((RTreeNSMFrame) lowerFrame).getTuples(), 0, mbr, 0);
+            mbrTuple.resetByTupleOffset(mbr, 0);
+
+            NodeFrontier frontier = nodeFrontiers.get(level);
+            interiorFrame.setPage(frontier.page);
+
+            interiorFrame.insert(mbrTuple, -1);
+
+            interiorFrame.getBuffer().putInt(
+                    interiorFrame.getTupleOffset(interiorFrame.getTupleCount() - 1) + mbrTuple.getTupleSize(),
+                    nodeFrontiers.get(level - 1).pageId);
+
+            if (interiorFrame.hasSpaceInsert(mbrTuple) != FrameOpSpaceStatus.SUFFICIENT_CONTIGUOUS_SPACE && !toRoot) {
+                lowerFrame = prevInteriorFrame;
+                lowerFrame.setPage(frontier.page);
+
+                propagateBulk(level + 1, toRoot);
+                propagated = true;
+
+                frontier.page.releaseWriteLatch();
+                bufferCache.unpin(frontier.page);
+                frontier.pageId = freePageManager.getFreePage(metaFrame);
+
+                frontier.page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, frontier.pageId), true);
+                frontier.page.acquireWriteLatch();
+                interiorFrame.setPage(frontier.page);
+                interiorFrame.initBuffer((byte) level);
+            }
+
+            if (toRoot && !propagated && level < nodeFrontiers.size() - 1) {
+                lowerFrame = prevInteriorFrame;
+                lowerFrame.setPage(frontier.page);
+                propagateBulk(level + 1, true);
+            }
+
+            leafFrame.setPage(nodeFrontiers.get(0).page);
+        }
+    }
+
+    @Override
+    public void validate() throws HyracksDataException {
+        throw new UnsupportedOperationException("Validation not implemented for R-Trees.");
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTreeCursorInitialState.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTreeCursorInitialState.java
index ac1eb7d..8a7ea8d 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTreeCursorInitialState.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTreeCursorInitialState.java
@@ -16,36 +16,59 @@
 package edu.uci.ics.hyracks.storage.am.rtree.impls;
 
 import edu.uci.ics.hyracks.storage.am.common.api.ICursorInitialState;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
 
 public class RTreeCursorInitialState implements ICursorInitialState {
 
-	private PathList pathList;
-	private int rootPage;
-	private ICachedPage page; // for disk order scan
+    private PathList pathList;
+    private int rootPage;
+    private ICachedPage page; // for disk order scan
+    private MultiComparator originalKeyCmp;
 
-	public RTreeCursorInitialState(PathList pathList, int rootPage) {
-		this.pathList = pathList;
-		this.rootPage = rootPage;
-	}
+    public RTreeCursorInitialState(PathList pathList, int rootPage) {
+        this.pathList = pathList;
+        this.rootPage = rootPage;
+    }
 
-	public PathList getPathList() {
-		return pathList;
-	}
+    public PathList getPathList() {
+        return pathList;
+    }
 
-	public int getRootPage() {
-		return rootPage;
-	}
+    public int getRootPage() {
+        return rootPage;
+    }
 
-	public void setRootPage(int rootPage) {
-		this.rootPage = rootPage;
-	}
+    public void setRootPage(int rootPage) {
+        this.rootPage = rootPage;
+    }
 
-	public ICachedPage getPage() {
-		return page;
-	}
+    public ICachedPage getPage() {
+        return page;
+    }
 
-	public void setPage(ICachedPage page) {
-		this.page = page;
-	}
+    public void setPage(ICachedPage page) {
+        this.page = page;
+    }
+
+    @Override
+    public MultiComparator getOriginalKeyComparator() {
+        return originalKeyCmp;
+    }
+
+    @Override
+    public void setOriginialKeyComparator(MultiComparator originalCmp) {
+        this.originalKeyCmp = originalCmp;
+    }
+
+    @Override
+    public ISearchOperationCallback getSearchOperationCallback() {
+        return null;
+    }
+
+    @Override
+    public void setSearchOperationCallback(ISearchOperationCallback searchCallback) {
+        // Do nothing
+    }
 }
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTreeOpContext.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTreeOpContext.java
index 6683444..219ab30 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTreeOpContext.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTreeOpContext.java
@@ -19,21 +19,22 @@
 
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexOpContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrame;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOp;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeInteriorFrame;
 import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeLeafFrame;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
 
-public class RTreeOpContext implements IIndexOpContext {
+public class RTreeOpContext implements IIndexOperationContext {
     private static final int INITIAL_TRAVERSE_LIST_SIZE = 100;
     public final MultiComparator cmp;
     public final IRTreeInteriorFrame interiorFrame;
     public final IRTreeLeafFrame leafFrame;
-    public IndexOp op;
+    public IndexOperation op;
     public ITreeIndexCursor cursor;
     public RTreeCursorInitialState cursorInitialState;
     public ITreeIndexMetaDataFrame metaFrame;
@@ -47,12 +48,22 @@
     public ArrayList<ICachedPage> NSNUpdates;
     public ArrayList<ICachedPage> LSNUpdates;
 
+    public final IModificationOperationCallback modificationCallback;
+
     public RTreeOpContext(IRTreeLeafFrame leafFrame, IRTreeInteriorFrame interiorFrame,
-            ITreeIndexMetaDataFrame metaFrame, IBinaryComparatorFactory[] cmpFactories, int treeHeightHint) {
-        this.cmp = MultiComparator.create(cmpFactories);
+            ITreeIndexMetaDataFrame metaFrame, IBinaryComparatorFactory[] cmpFactories, int treeHeightHint,
+            IModificationOperationCallback modificationCallback) {
+        
+        if (cmpFactories[0] != null) { 
+            this.cmp = MultiComparator.create(cmpFactories);
+        } else {
+            this.cmp = null;
+        }
+        
         this.interiorFrame = interiorFrame;
         this.leafFrame = leafFrame;
         this.metaFrame = metaFrame;
+        this.modificationCallback = modificationCallback;
         pathList = new PathList(treeHeightHint, treeHeightHint);
         NSNUpdates = new ArrayList<ICachedPage>();
         LSNUpdates = new ArrayList<ICachedPage>();
@@ -78,11 +89,11 @@
     }
 
     @Override
-    public void reset(IndexOp newOp) {
+    public void setOperation(IndexOperation newOp) {
         if (op != null && newOp == op) {
             return;
         }
-        if (op != IndexOp.SEARCH && op != IndexOp.DISKORDERSCAN) {
+        if (op != IndexOperation.SEARCH && op != IndexOperation.DISKORDERSCAN) {
             if (splitKey == null) {
                 splitKey = new RTreeSplitKey(interiorFrame.getTupleWriter().createTupleReference(), interiorFrame
                         .getTupleWriter().createTupleReference());
@@ -96,4 +107,9 @@
         }
         this.op = newOp;
     }
+
+    @Override
+    public IndexOperation getOperation() {
+        return op;
+    }
 }
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTreeSearchCursor.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTreeSearchCursor.java
index ee7ec5f..6b5b1b5 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTreeSearchCursor.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/RTreeSearchCursor.java
@@ -33,20 +33,20 @@
     private int fileId = -1;
     private ICachedPage page = null;
     private IRTreeInteriorFrame interiorFrame = null;
-    private IRTreeLeafFrame leafFrame = null;
+    protected IRTreeLeafFrame leafFrame = null;
     private IBufferCache bufferCache = null;
 
     private SearchPredicate pred;
     private PathList pathList;
     private int rootPage;
-    private ITupleReference searchKey;
+    protected ITupleReference searchKey;
 
     private int tupleIndex = 0;
     private int tupleIndexInc = 0;
     private int currentTupleIndex = 0;
     private int pageId = -1;
 
-    private MultiComparator cmp;
+    protected MultiComparator cmp;
 
     private ITreeIndexTupleReference frameTuple;
     private boolean readLatched = false;
@@ -70,6 +70,7 @@
         pathList = null;
     }
 
+    @Override
     public ITupleReference getTuple() {
         return frameTuple;
     }
@@ -87,7 +88,7 @@
         return page;
     }
 
-    private boolean fetchNextLeafPage() throws HyracksDataException {
+    protected boolean fetchNextLeafPage() throws HyracksDataException {
         boolean succeeded = false;
         if (readLatched) {
             page.releaseReadLatch();
@@ -117,15 +118,18 @@
                 }
 
                 if (!isLeaf) {
+                    // We do DFS so that we get the tuples ordered (for disk
+                    // RTrees only) in the case we we are using total order
+                    // (such as Hilbert order)
                     if (searchKey != null) {
-                        for (int i = 0; i < interiorFrame.getTupleCount(); i++) {
+                        for (int i = interiorFrame.getTupleCount() - 1; i >= 0; i--) {
                             int childPageId = interiorFrame.getChildPageIdIfIntersect(searchKey, i, cmp);
                             if (childPageId != -1) {
                                 pathList.add(childPageId, pageLsn, -1);
                             }
                         }
                     } else {
-                        for (int i = 0; i < interiorFrame.getTupleCount(); i++) {
+                        for (int i = interiorFrame.getTupleCount() - 1; i >= 0; i--) {
                             int childPageId = interiorFrame.getChildPageId(i);
                             pathList.add(childPageId, pageLsn, -1);
                         }
@@ -230,12 +234,8 @@
     }
 
     @Override
-    public void reset() {
-        try {
-            close();
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
+    public void reset() throws HyracksDataException {
+        close();
     }
 
     @Override
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/Rectangle.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/Rectangle.java
index cb9b160..d0f4c71 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/Rectangle.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/impls/Rectangle.java
@@ -19,94 +19,120 @@
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProvider;
 
 public class Rectangle {
-	private int dim;
-	private double[] low;
-	private double[] high;
+    private int dim;
+    private double[] low;
+    private double[] high;
 
-	public Rectangle(int dim) {
-		this.dim = dim;
-		low = new double[this.dim];
-		high = new double[this.dim];
-	}
+    public Rectangle(int dim) {
+        this.dim = dim;
+        low = new double[this.dim];
+        high = new double[this.dim];
+    }
 
-	public int getDim() {
-		return dim;
-	}
+    public int getDim() {
+        return dim;
+    }
 
-	public double getLow(int i) {
-		return low[i];
-	}
+    public double getLow(int i) {
+        return low[i];
+    }
 
-	public double getHigh(int i) {
-		return high[i];
-	}
+    public double getHigh(int i) {
+        return high[i];
+    }
 
-	public void setLow(int i, double value) {
-		low[i] = value;
-	}
+    public void setLow(int i, double value) {
+        low[i] = value;
+    }
 
-	public void setHigh(int i, double value) {
-		high[i] = value;
-	}
+    public void setHigh(int i, double value) {
+        high[i] = value;
+    }
 
-	public void set(ITupleReference tuple, IPrimitiveValueProvider[] valueProviders) {
-		for (int i = 0; i < getDim(); i++) {
-			int j = i + getDim();
-			setLow(i, valueProviders[i].getValue(
-					tuple.getFieldData(i), tuple.getFieldStart(i)));
-			setHigh(i, valueProviders[j].getValue(
-					tuple.getFieldData(j), tuple.getFieldStart(j)));
-		}
-	}
+    public void set(ITupleReference tuple, IPrimitiveValueProvider[] valueProviders) {
+        for (int i = 0; i < getDim(); i++) {
+            int j = i + getDim();
+            setLow(i, valueProviders[i].getValue(tuple.getFieldData(i), tuple.getFieldStart(i)));
+            setHigh(i, valueProviders[j].getValue(tuple.getFieldData(j), tuple.getFieldStart(j)));
+        }
+    }
 
-	public void enlarge(ITupleReference tupleToBeInserted, IPrimitiveValueProvider[] valueProviders) {
-		for (int i = 0; i < getDim(); i++) {
-			int j = getDim() + i;
-			double low = valueProviders[i].getValue(
-					tupleToBeInserted.getFieldData(i),
-					tupleToBeInserted.getFieldStart(i));
-			if (getLow(i) > low) {
-				setLow(i, low);
-			}
-			double high = valueProviders[j].getValue(
-					tupleToBeInserted.getFieldData(j),
-					tupleToBeInserted.getFieldStart(j));
-			if (getHigh(i) < high) {
-				setHigh(i, high);
-			}
-		}
-	}
+    public void enlarge(ITupleReference tupleToBeInserted, IPrimitiveValueProvider[] valueProviders) {
+        for (int i = 0; i < getDim(); i++) {
+            int j = getDim() + i;
+            double low = valueProviders[i].getValue(tupleToBeInserted.getFieldData(i),
+                    tupleToBeInserted.getFieldStart(i));
+            if (getLow(i) > low) {
+                setLow(i, low);
+            }
+            double high = valueProviders[j].getValue(tupleToBeInserted.getFieldData(j),
+                    tupleToBeInserted.getFieldStart(j));
+            if (getHigh(i) < high) {
+                setHigh(i, high);
+            }
+        }
+    }
 
-	public double margin() {
-		double margin = 0.0;
-		double mul = Math.pow(2, (double) getDim() - 1.0);
-		for (int i = 0; i < getDim(); i++) {
-			margin += (getHigh(i) - getLow(i)) * mul;
-		}
-		return margin;
-	}
+    public double enlargedArea(ITupleReference tupleToBeInserted, IPrimitiveValueProvider[] valueProviders) {
+        double areaBeforeEnlarge = area();
+        double areaAfterEnlarge = 1.0;
 
-	public double overlappedArea(Rectangle rec) {
-		double area = 1.0;
-		double f1, f2;
+        for (int i = 0; i < getDim(); i++) {
+            int j = getDim() + i;
 
-		for (int i = 0; i < getDim(); i++) {
-			if (getLow(i) > rec.getHigh(i) || getHigh(i) < rec.getLow(i)) {
-				return 0.0;
-			}
+            double low = valueProviders[i].getValue(tupleToBeInserted.getFieldData(i),
+                    tupleToBeInserted.getFieldStart(i));
+            double lowAfterEnlargement;
+            if (getLow(i) > low) {
+                lowAfterEnlargement = low;
+            } else {
+                lowAfterEnlargement = getLow(i);
+            }
 
-			f1 = Math.max(getLow(i), rec.getLow(i));
-			f2 = Math.min(getHigh(i), rec.getHigh(i));
-			area *= f2 - f1;
-		}
-		return area;
-	}
+            double high = valueProviders[j].getValue(tupleToBeInserted.getFieldData(j),
+                    tupleToBeInserted.getFieldStart(j));
+            double highAfterEnlargement;
+            if (getHigh(i) < high) {
+                highAfterEnlargement = high;
+            } else {
+                highAfterEnlargement = getHigh(i);
+            }
 
-	public double area() {
-		double area = 1.0;
-		for (int i = 0; i < getDim(); i++) {
-			area *= getHigh(i) - getLow(i);
-		}
-		return area;
-	}
+            areaAfterEnlarge *= highAfterEnlargement - lowAfterEnlargement;
+        }
+        return areaAfterEnlarge - areaBeforeEnlarge;
+    }
+
+    public double margin() {
+        double margin = 0.0;
+        double mul = Math.pow(2, (double) getDim() - 1.0);
+        for (int i = 0; i < getDim(); i++) {
+            margin += (getHigh(i) - getLow(i)) * mul;
+        }
+        return margin;
+    }
+
+    public double overlappedArea(Rectangle rec) {
+        double area = 1.0;
+        double f1, f2;
+
+        for (int i = 0; i < getDim(); i++) {
+            if (getLow(i) > rec.getHigh(i) || getHigh(i) < rec.getLow(i)) {
+                return 0.0;
+            }
+
+            f1 = Math.max(getLow(i), rec.getLow(i));
+            f2 = Math.min(getHigh(i), rec.getHigh(i));
+            area *= f2 - f1;
+        }
+        return area;
+    }
+
+    public double area() {
+        double area = 1.0;
+        for (int i = 0; i < getDim(); i++) {
+            area *= getHigh(i) - getLow(i);
+        }
+        return area;
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/HilbertDoubleComparator.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/HilbertDoubleComparator.java
new file mode 100644
index 0000000..7fce7e0
--- /dev/null
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/HilbertDoubleComparator.java
@@ -0,0 +1,180 @@
+package edu.uci.ics.hyracks.storage.am.rtree.linearize;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparator;
+import edu.uci.ics.hyracks.data.std.primitive.DoublePointable;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProvider;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.DoubleArrayList;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IntArrayList;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.DoublePrimitiveValueProviderFactory;
+
+/*
+ * This compares two points based on the hilbert curve. Currently, it only supports
+ * doubles (this can be changed by changing all doubles to ints as there are no
+ * number generics in Java) in the two-dimensional space. For more dimensions, the
+ * state machine has to be automatically generated. The idea of the fractal generation
+ * of the curve is described e.g. in http://dl.acm.org/ft_gateway.cfm?id=383528&type=pdf
+ * 
+ * Unlike the described approach, this comparator does not compute the hilbert value at 
+ * any point. Instead, it only evaluates how the two inputs compare to each other. This
+ * is done by starting at the lowest hilbert resolution and zooming in on the fractal until
+ * the two points are in different quadrants.
+ * 
+ * As a performance optimization, the state of the state machine is saved in a stack and 
+ * maintained over comparisons. The idea behind this is that comparisons are usually in a
+ * similar area (e.g. geo coordinates). Zooming in from [-MAX_VALUE, MAX_VALUE] would take
+ * ~300 steps every time. Instead, the comparator start from the previous state and zooms out
+ * if necessary
+ */
+
+public class HilbertDoubleComparator implements ILinearizeComparator {
+    private final int dim; // dimension
+    private final HilbertState[] states;
+
+    private double[] bounds;
+    private double stepsize;
+    private int state;
+    private IntArrayList stateStack = new IntArrayList(1000, 200);
+    private DoubleArrayList boundsStack = new DoubleArrayList(2000, 400);
+
+    private IPrimitiveValueProvider valueProvider = DoublePrimitiveValueProviderFactory.INSTANCE
+            .createPrimitiveValueProvider();
+
+    private double[] a;
+    private double[] b;
+
+    private class HilbertState {
+        public final int[] nextState;
+        public final int[] position;
+
+        public HilbertState(int[] nextState, int[] order) {
+            this.nextState = nextState;
+            this.position = order;
+        }
+    }
+
+    public HilbertDoubleComparator(int dimension) {
+        if (dimension != 2)
+            throw new IllegalArgumentException();
+        dim = dimension;
+        a = new double[dim];
+        b = new double[dim];
+
+        states = new HilbertState[] { new HilbertState(new int[] { 3, 0, 1, 0 }, new int[] { 0, 1, 3, 2 }),
+                new HilbertState(new int[] { 1, 1, 0, 2 }, new int[] { 2, 1, 3, 0 }),
+                new HilbertState(new int[] { 2, 3, 2, 1 }, new int[] { 2, 3, 1, 0 }),
+                new HilbertState(new int[] { 0, 2, 3, 3 }, new int[] { 0, 3, 1, 2 }) };
+
+        resetStateMachine();
+    }
+
+    private void resetStateMachine() {
+        state = 0;
+        stateStack.clear();
+        stepsize = Double.MAX_VALUE / 2;
+        bounds = new double[dim];
+        boundsStack.clear();
+    }
+
+    public int compare() {
+        boolean equal = true;
+        for (int i = 0; i < dim; i++) {
+            if (a[i] != b[i])
+                equal = false;
+        }
+        if (equal)
+            return 0;
+
+        // We keep the state of the state machine after a comparison. In most
+        // cases,
+        // the needed zoom factor is close to the old one. In this step, we
+        // check if we have
+        // to zoom out
+        while (true) {
+            if (stateStack.size() <= dim) {
+                resetStateMachine();
+                break;
+            }
+            boolean zoomOut = false;
+            for (int i = 0; i < dim; i++) {
+                if (Math.min(a[i], b[i]) <= bounds[i] - 2 * stepsize
+                        || Math.max(a[i], b[i]) >= bounds[i] + 2 * stepsize) {
+                    zoomOut = true;
+                    break;
+                }
+            }
+            state = stateStack.getLast();
+            stateStack.removeLast();
+            for (int j = dim - 1; j >= 0; j--) {
+                bounds[j] = boundsStack.getLast();
+                boundsStack.removeLast();
+            }
+            stepsize *= 2;
+            if (!zoomOut) {
+                state = stateStack.getLast();
+                stateStack.removeLast();
+                for (int j = dim - 1; j >= 0; j--) {
+                    bounds[j] = boundsStack.getLast();
+                    boundsStack.removeLast();
+                }
+                stepsize *= 2;
+                break;
+            }
+        }
+
+        while (true) {
+            stateStack.add(state);
+            for (int j = 0; j < dim; j++) {
+                boundsStack.add(bounds[j]);
+            }
+
+            // Find the quadrant in which A and B are
+            int quadrantA = 0, quadrantB = 0;
+            for (int i = dim - 1; i >= 0; i--) {
+                if (a[i] >= bounds[i])
+                    quadrantA ^= (1 << (dim - i - 1));
+                if (b[i] >= bounds[i])
+                    quadrantB ^= (1 << (dim - i - 1));
+
+                if (a[i] >= bounds[i]) {
+                    bounds[i] += stepsize;
+                } else {
+                    bounds[i] -= stepsize;
+                }
+            }
+
+            stepsize /= 2;
+            if (stepsize <= 2 * DoublePointable.getEpsilon())
+                return 0;
+            // avoid infinite loop due to machine epsilon problems
+
+            if (quadrantA != quadrantB) {
+                // find the position of A and B's quadrants
+                int posA = states[state].position[quadrantA];
+                int posB = states[state].position[quadrantB];
+
+                if (posA < posB)
+                    return -1;
+                else
+                    return 1;
+            }
+
+            state = states[state].nextState[quadrantA];
+        }
+    }
+
+    @Override
+    public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
+        for (int i = 0; i < dim; i++) {
+            a[i] = DoubleSerializerDeserializer.getDouble(b1, s1 + (i * 8));
+            b[i] = DoubleSerializerDeserializer.getDouble(b2, s2 + (i * 8));
+        }
+
+        return compare();
+    }
+
+    @Override
+    public int getDimensions() {
+        return dim;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/HilbertDoubleComparatorFactory.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/HilbertDoubleComparatorFactory.java
new file mode 100644
index 0000000..e06dba8
--- /dev/null
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/HilbertDoubleComparatorFactory.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.rtree.linearize;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparator;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+
+public class HilbertDoubleComparatorFactory implements ILinearizeComparatorFactory {
+    private static final long serialVersionUID = 1L;
+    
+    private int dim;
+
+    public static HilbertDoubleComparatorFactory get(int dim) {
+        return new HilbertDoubleComparatorFactory(dim);
+    }
+    
+    public HilbertDoubleComparatorFactory(int dim) {
+    	this.dim = dim;
+    }
+
+    @Override
+    public ILinearizeComparator createBinaryComparator() {
+        return new HilbertDoubleComparator(dim);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/ZCurveDoubleComparator.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/ZCurveDoubleComparator.java
new file mode 100644
index 0000000..ee47761
--- /dev/null
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/ZCurveDoubleComparator.java
@@ -0,0 +1,136 @@
+package edu.uci.ics.hyracks.storage.am.rtree.linearize;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparator;
+import edu.uci.ics.hyracks.data.std.primitive.DoublePointable;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProvider;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.DoubleArrayList;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.DoublePrimitiveValueProviderFactory;
+
+/*
+ * This compares two points based on the z curve. For doubles, we cannot use
+ * the simple bit magic approach. There may, however, be a better approach than this.
+ */
+
+public class ZCurveDoubleComparator implements ILinearizeComparator {
+    private final int dim; // dimension
+
+    private double[] bounds;
+    private double stepsize;
+    private DoubleArrayList boundsStack = new DoubleArrayList(2000, 400);
+
+    private IPrimitiveValueProvider valueProvider = DoublePrimitiveValueProviderFactory.INSTANCE
+            .createPrimitiveValueProvider();
+
+    private double[] a;
+    private double[] b;
+
+    public ZCurveDoubleComparator(int dimension) {
+        dim = dimension;
+        a = new double[dim];
+        b = new double[dim];
+
+        resetStateMachine();
+    }
+
+    private void resetStateMachine() {
+        stepsize = Double.MAX_VALUE / 2;
+        bounds = new double[dim];
+        boundsStack.clear();
+    }
+
+    public int compare() {
+        boolean equal = true;
+        for (int i = 0; i < dim; i++) {
+            if (a[i] != b[i])
+                equal = false;
+        }
+        if (equal)
+            return 0;
+
+        // We keep the state of the state machine after a comparison. In most
+        // cases,
+        // the needed zoom factor is close to the old one. In this step, we
+        // check if we have
+        // to zoom out
+        while (true) {
+            if (boundsStack.size() <= dim) {
+                resetStateMachine();
+                break;
+            }
+            boolean zoomOut = false;
+            for (int i = 0; i < dim; i++) {
+                if (Math.min(a[i], b[i]) <= bounds[i] - 2 * stepsize
+                        || Math.max(a[i], b[i]) >= bounds[i] + 2 * stepsize) {
+                    zoomOut = true;
+                    break;
+                }
+            }
+
+            for (int j = dim - 1; j >= 0; j--) {
+                bounds[j] = boundsStack.getLast();
+                boundsStack.removeLast();
+            }
+            stepsize *= 2;
+            if (!zoomOut) {
+                for (int j = dim - 1; j >= 0; j--) {
+                    bounds[j] = boundsStack.getLast();
+                    boundsStack.removeLast();
+                }
+                stepsize *= 2;
+                break;
+            }
+        }
+
+        while (true) {
+            for (int j = 0; j < dim; j++) {
+                boundsStack.add(bounds[j]);
+            }
+
+            // Find the quadrant in which A and B are
+            int quadrantA = 0, quadrantB = 0;
+            for (int i = dim - 1; i >= 0; i--) {
+                if (a[i] >= bounds[i])
+                    quadrantA ^= (1 << (dim - i - 1));
+                if (b[i] >= bounds[i])
+                    quadrantB ^= (1 << (dim - i - 1));
+
+                if (a[i] >= bounds[i]) {
+                    bounds[i] += stepsize;
+                } else {
+                    bounds[i] -= stepsize;
+                }
+            }
+
+            stepsize /= 2;
+            if (stepsize <= 2 * DoublePointable.getEpsilon())
+                return 0;
+            // avoid infinite loop due to machine epsilon problems
+
+            if (quadrantA != quadrantB) {
+                // find the position of A and B's quadrants
+                if (quadrantA < quadrantB)
+                    return -1;
+                else if (quadrantA > quadrantB)
+                    return 1;
+                else
+                    return 0;
+            }
+        }
+    }
+
+    @Override
+    public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
+        for (int i = 0; i < dim; i++) {
+            a[i] = DoubleSerializerDeserializer.getDouble(b1, s1 + (i * 8));
+            b[i] = DoubleSerializerDeserializer.getDouble(b2, s2 + (i * 8));
+        }
+
+        return compare();
+    }
+
+    @Override
+    public int getDimensions() {
+        return dim;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/ZCurveDoubleComparatorFactory.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/ZCurveDoubleComparatorFactory.java
new file mode 100644
index 0000000..f1b5806
--- /dev/null
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/ZCurveDoubleComparatorFactory.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.rtree.linearize;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparator;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+
+public class ZCurveDoubleComparatorFactory implements ILinearizeComparatorFactory {
+    private static final long serialVersionUID = 1L;
+    
+    private int dim;
+
+    public static ZCurveDoubleComparatorFactory get(int dim) {
+        return new ZCurveDoubleComparatorFactory(dim);
+    }
+    
+    public ZCurveDoubleComparatorFactory(int dim) {
+    	this.dim = dim;
+    }
+
+    @Override
+    public ILinearizeComparator createBinaryComparator() {
+        return new ZCurveDoubleComparator(dim);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/ZCurveIntComparator.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/ZCurveIntComparator.java
new file mode 100644
index 0000000..1f26f41
--- /dev/null
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/ZCurveIntComparator.java
@@ -0,0 +1,129 @@
+package edu.uci.ics.hyracks.storage.am.rtree.linearize;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparator;
+import edu.uci.ics.hyracks.data.std.primitive.DoublePointable;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.DoubleArrayList;
+
+/*
+ * This compares two points based on the z curve. For doubles, we cannot use
+ * the simple bit magic approach. There may, however, be a better approach than this.
+ */
+
+public class ZCurveIntComparator implements ILinearizeComparator {
+    private final int dim; // dimension
+
+    private double[] bounds;
+    private double stepsize;
+    private DoubleArrayList boundsStack = new DoubleArrayList(2000, 400);
+
+    private int[] a;
+    private int[] b;
+
+    public ZCurveIntComparator(int dimension) {
+        dim = dimension;
+        a = new int[dim];
+        b = new int[dim];
+
+        resetStateMachine();
+    }
+
+    private void resetStateMachine() {
+        stepsize = Integer.MAX_VALUE / 2;
+        bounds = new double[dim];
+        boundsStack.clear();
+    }
+
+    public int compare() {
+        boolean equal = true;
+        for (int i = 0; i < dim; i++) {
+            if (a[i] != b[i])
+                equal = false;
+        }
+        if (equal)
+            return 0;
+
+        // We keep the state of the state machine after a comparison. In most cases,
+        // the needed zoom factor is close to the old one. In this step, we check if we have
+        // to zoom out
+        while (true) {
+            if (boundsStack.size() <= dim) {
+                resetStateMachine();
+                break;
+            }
+            boolean zoomOut = false;
+            for (int i = 0; i < dim; i++) {
+                if (Math.min(a[i], b[i]) <= bounds[i] - 2 * stepsize
+                        || Math.max(a[i], b[i]) >= bounds[i] + 2 * stepsize) {
+                    zoomOut = true;
+                    break;
+                }
+            }
+
+            for (int j = dim - 1; j >= 0; j--) {
+                bounds[j] = boundsStack.getLast();
+                boundsStack.removeLast();
+            }
+            stepsize *= 2;
+            if (!zoomOut) {
+                for (int j = dim - 1; j >= 0; j--) {
+                    bounds[j] = boundsStack.getLast();
+                    boundsStack.removeLast();
+                }
+                stepsize *= 2;
+                break;
+            }
+        }
+
+        while (true) {
+            for (int j = 0; j < dim; j++) {
+                boundsStack.add(bounds[j]);
+            }
+
+            // Find the quadrant in which A and B are
+            int quadrantA = 0, quadrantB = 0;
+            for (int i = dim - 1; i >= 0; i--) {
+                if (a[i] >= bounds[i])
+                    quadrantA ^= (1 << (dim - i - 1));
+                if (b[i] >= bounds[i])
+                    quadrantB ^= (1 << (dim - i - 1));
+
+                if (a[i] >= bounds[i]) {
+                    bounds[i] += stepsize;
+                } else {
+                    bounds[i] -= stepsize;
+                }
+            }
+
+            stepsize /= 2;
+            if (stepsize <= 2 * DoublePointable.getEpsilon())
+                return 0;
+            // avoid infinite loop due to machine epsilon problems
+
+            if (quadrantA != quadrantB) {
+                // find the position of A and B's quadrants
+                if (quadrantA < quadrantB)
+                    return -1;
+                else if (quadrantA > quadrantB)
+                    return 1;
+                else
+                    return 0;
+            }
+        }
+    }
+
+    @Override
+    public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
+        for (int i = 0; i < dim; i++) {
+            a[i] = IntegerSerializerDeserializer.getInt(b1, s1 + (i * 8));
+            b[i] = IntegerSerializerDeserializer.getInt(b2, s2 + (i * 8));
+        }
+
+        return compare();
+    }
+
+    @Override
+    public int getDimensions() {
+        return dim;
+    }
+}
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/ZCurveIntComparatorFactory.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/ZCurveIntComparatorFactory.java
new file mode 100644
index 0000000..4a35a79
--- /dev/null
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/linearize/ZCurveIntComparatorFactory.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.am.rtree.linearize;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparator;
+import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
+
+public class ZCurveIntComparatorFactory implements ILinearizeComparatorFactory {
+    private static final long serialVersionUID = 1L;
+    
+    private int dim;
+
+    public static ZCurveIntComparatorFactory get(int dim) {
+        return new ZCurveIntComparatorFactory(dim);
+    }
+    
+    public ZCurveIntComparatorFactory(int dim) {
+    	this.dim = dim;
+    }
+
+    @Override
+    public ILinearizeComparator createBinaryComparator() {
+        return new ZCurveIntComparator(dim);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/util/RTreeUtils.java b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/util/RTreeUtils.java
index 6f5d36f..5889abb 100644
--- a/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/util/RTreeUtils.java
+++ b/hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/util/RTreeUtils.java
@@ -18,6 +18,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.data.std.api.IPointableFactory;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
@@ -30,24 +31,27 @@
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreeNSMInteriorFrameFactory;
 import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreeNSMLeafFrameFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
 import edu.uci.ics.hyracks.storage.am.rtree.tuples.RTreeTypeAwareTupleWriterFactory;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
 public class RTreeUtils {
-    public static RTree createRTree(IBufferCache bufferCache, ITypeTraits[] typeTraits,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, IBinaryComparatorFactory[] cmpFactories) {
+    public static RTree createRTree(IBufferCache bufferCache, IFileMapProvider fileMapProvider,
+            ITypeTraits[] typeTraits, IPrimitiveValueProviderFactory[] valueProviderFactories,
+            IBinaryComparatorFactory[] cmpFactories, RTreePolicyType rtreePolicyType, FileReference file) {
 
         RTreeTypeAwareTupleWriterFactory tupleWriterFactory = new RTreeTypeAwareTupleWriterFactory(typeTraits);
         ITreeIndexFrameFactory interiorFrameFactory = new RTreeNSMInteriorFrameFactory(tupleWriterFactory,
-                valueProviderFactories);
+                valueProviderFactories, rtreePolicyType);
         ITreeIndexFrameFactory leafFrameFactory = new RTreeNSMLeafFrameFactory(tupleWriterFactory,
-                valueProviderFactories);
+                valueProviderFactories, rtreePolicyType);
         ITreeIndexMetaDataFrameFactory metaFrameFactory = new LIFOMetaDataFrameFactory();
 
         IFreePageManager freePageManager = new LinkedListFreePageManager(bufferCache, 0, metaFrameFactory);
-        RTree rtree = new RTree(bufferCache, typeTraits.length, cmpFactories, freePageManager, interiorFrameFactory,
-                leafFrameFactory);
+        RTree rtree = new RTree(bufferCache, fileMapProvider, freePageManager, interiorFrameFactory, leafFrameFactory,
+                cmpFactories, typeTraits.length, file);
         return rtree;
     }
 
diff --git a/hyracks/hyracks-storage-common/pom.xml b/hyracks/hyracks-storage-common/pom.xml
index 568b0ba..bde1ac4 100644
--- a/hyracks/hyracks-storage-common/pom.xml
+++ b/hyracks/hyracks-storage-common/pom.xml
@@ -1,14 +1,12 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-common</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-common</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -29,7 +27,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/IStorageManagerInterface.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/IStorageManagerInterface.java
index 562305e..5759218 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/IStorageManagerInterface.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/IStorageManagerInterface.java
@@ -19,9 +19,15 @@
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceRepository;
+import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactory;
 
 public interface IStorageManagerInterface extends Serializable {
     public IBufferCache getBufferCache(IHyracksTaskContext ctx);
 
     public IFileMapProvider getFileMapProvider(IHyracksTaskContext ctx);
+
+    public ILocalResourceRepository getLocalResourceRepository(IHyracksTaskContext ctx);
+
+    public ResourceIdFactory getResourceIdFactory(IHyracksTaskContext ctx);
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/BufferCache.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/BufferCache.java
index 7f17f38..03e46f5 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/BufferCache.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/BufferCache.java
@@ -137,19 +137,11 @@
         pinSanityCheck(dpid);
         CachedPage cPage = findPage(dpid, newPage);
         if (!newPage) {
-            if (!cPage.valid) {
-                /*
-                 * We got a buffer and we have pinned it. But its invalid. If its a new page, we just mark it as valid
-                 * and return. Or else, while we hold the page lock, we get a write latch on the data and start a read.
-                 */
-                cPage.acquireWriteLatch(false);
-                try {
-                    if (!cPage.valid) {
-                        read(cPage);
-                    }
+            // Resolve race of multiple threads trying to read the page from disk.
+            synchronized (cPage) {
+                if (!cPage.valid) {
+                    read(cPage);
                     cPage.valid = true;
-                } finally {
-                    cPage.releaseWriteLatch();
                 }
             }
         } else {
@@ -774,9 +766,11 @@
                 if (fInfo != null) {
                     // Mark the fInfo as deleted, 
                     // such that when its pages are reclaimed in openFile(),
-                    // the pages are not flushed to disk but only invalidates.
-                    ioManager.close(fInfo.getFileHandle());
-                    fInfo.markAsDeleted();
+                    // the pages are not flushed to disk but only invalidated.
+                    if (!fInfo.fileHasBeenDeleted()) {
+                        ioManager.close(fInfo.getFileHandle());
+                        fInfo.markAsDeleted();
+                    }
                 }
             }
         }
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/DebugBufferCache.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/DebugBufferCache.java
index d610c7e..13f7d52 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/DebugBufferCache.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/DebugBufferCache.java
@@ -30,16 +30,16 @@
 
     // Actual BufferCache functionality is delegated to this bufferCache.
     private final IBufferCache bufferCache;
-    private AtomicLong pinCount;
-    private AtomicLong unpinCount;
-    private AtomicLong readLatchCount;
-    private AtomicLong readUnlatchCount;
-    private AtomicLong writeLatchCount;
-    private AtomicLong writeUnlatchCount;
-    private AtomicLong createFileCount;
-    private AtomicLong deleteFileCount;
-    private AtomicLong openFileCount;
-    private AtomicLong closeFileCount;
+    private AtomicLong pinCount = new AtomicLong();
+    private AtomicLong unpinCount = new AtomicLong();
+    private AtomicLong readLatchCount = new AtomicLong();
+    private AtomicLong readUnlatchCount = new AtomicLong();
+    private AtomicLong writeLatchCount = new AtomicLong();
+    private AtomicLong writeUnlatchCount = new AtomicLong();
+    private AtomicLong createFileCount = new AtomicLong();
+    private AtomicLong deleteFileCount = new AtomicLong();
+    private AtomicLong openFileCount = new AtomicLong();
+    private AtomicLong closeFileCount = new AtomicLong();
 
     public DebugBufferCache(IBufferCache bufferCache) {
         this.bufferCache = bufferCache;
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ILocalResourceFactory.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ILocalResourceFactory.java
new file mode 100644
index 0000000..c443b0b
--- /dev/null
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ILocalResourceFactory.java
@@ -0,0 +1,19 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.common.file;
+
+public interface ILocalResourceFactory {
+    public LocalResource createLocalResource(long resourceId, String resourceName, int partition);
+}
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ILocalResourceFactoryProvider.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ILocalResourceFactoryProvider.java
new file mode 100644
index 0000000..fb6a210
--- /dev/null
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ILocalResourceFactoryProvider.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.common.file;
+
+import java.io.Serializable;
+
+public interface ILocalResourceFactoryProvider extends Serializable {
+    public ILocalResourceFactory getLocalResourceFactory();
+}
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ILocalResourceRepository.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ILocalResourceRepository.java
new file mode 100644
index 0000000..ab9ec41
--- /dev/null
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ILocalResourceRepository.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.common.file;
+
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public interface ILocalResourceRepository {
+	
+    public LocalResource getResourceById(long id) throws HyracksDataException;
+
+    public LocalResource getResourceByName(String name) throws HyracksDataException;
+
+    public void insert(LocalResource resource) throws HyracksDataException;
+
+    public void deleteResourceById(long id) throws HyracksDataException;
+
+    public void deleteResourceByName(String name) throws HyracksDataException;
+
+    public List<LocalResource> getAllResources() throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ILocalResourceRepositoryFactory.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ILocalResourceRepositoryFactory.java
new file mode 100644
index 0000000..4b3124a
--- /dev/null
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ILocalResourceRepositoryFactory.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.common.file;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public interface ILocalResourceRepositoryFactory {
+    public ILocalResourceRepository createRepository() throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/LocalResource.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/LocalResource.java
new file mode 100644
index 0000000..f4575f3
--- /dev/null
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/LocalResource.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.common.file;
+
+import java.io.Serializable;
+
+public class LocalResource implements Serializable {
+    private static final long serialVersionUID = 1L;
+    private final long resourceId;
+    private final String resourceName;
+    private final int partition;
+    private final int resourceType;
+    private final Object object;
+
+    public static final int TransientResource = 0;
+    public static final int LSMBTreeResource = 1;
+    public static final int LSMRTreeResource = 2;
+    public static final int LSMInvertedIndexResource = 3;
+
+    public LocalResource(long resourceId, String resourceName, int partition, int resourceType, Object object) {
+        this.resourceId = resourceId;
+        this.resourceName = resourceName;
+        this.partition = partition;
+        this.resourceType = resourceType;
+        this.object = object;
+    }
+
+    public long getResourceId() {
+        return resourceId;
+    }
+
+    public String getResourceName() {
+        return resourceName;
+    }
+
+    public int getPartition() {
+        return partition;
+    }
+
+    public int getResourceType() {
+        return resourceType;
+    }
+
+    public Object getResourceObject() {
+        return object;
+    }
+}
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/NoOpLocalResourceFactoryProvider.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/NoOpLocalResourceFactoryProvider.java
new file mode 100644
index 0000000..e69f4e7
--- /dev/null
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/NoOpLocalResourceFactoryProvider.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.common.file;
+
+/**
+ * Dummy operation factory provider that does nothing.
+ */
+public enum NoOpLocalResourceFactoryProvider implements ILocalResourceFactoryProvider {
+    INSTANCE;
+
+    @Override
+    public ILocalResourceFactory getLocalResourceFactory() {
+        return null;
+    }
+}
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ResourceIdFactory.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ResourceIdFactory.java
new file mode 100644
index 0000000..cb5c97e
--- /dev/null
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ResourceIdFactory.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.common.file;
+
+import java.util.concurrent.atomic.AtomicLong;
+
+public class ResourceIdFactory {
+    private AtomicLong id = null;
+
+    public ResourceIdFactory(long initialValue) {
+        id = new AtomicLong(initialValue);
+    }
+
+    public long createId() {
+        return id.getAndIncrement();
+    }
+    
+    public void initId(long id) {
+        this.id.set(id);
+    }
+}
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ResourceIdFactoryProvider.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ResourceIdFactoryProvider.java
new file mode 100644
index 0000000..62cdb36
--- /dev/null
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ResourceIdFactoryProvider.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.common.file;
+
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public class ResourceIdFactoryProvider {
+    private ILocalResourceRepository localResourceRepository;
+
+    public ResourceIdFactoryProvider(ILocalResourceRepository localResourceRepository) {
+        this.localResourceRepository = localResourceRepository;
+    }
+
+    public ResourceIdFactory createResourceIdFactory() throws HyracksDataException {
+        List<LocalResource> localResources = localResourceRepository.getAllResources();
+        long largestResourceId = 0;
+        for (LocalResource localResource : localResources) {
+            if (largestResourceId < localResource.getResourceId()) {
+                largestResourceId = localResource.getResourceId();
+            }
+        }
+        return new ResourceIdFactory(largestResourceId);
+    }
+}
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientFileMapManager.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientFileMapManager.java
new file mode 100644
index 0000000..e8085da
--- /dev/null
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientFileMapManager.java
@@ -0,0 +1,56 @@
+package edu.uci.ics.hyracks.storage.common.file;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+
+public class TransientFileMapManager implements IFileMapManager {
+    private static final long serialVersionUID = 1L;
+
+    private Map<Integer, FileReference> id2nameMap = new HashMap<Integer, FileReference>();
+    private Map<FileReference, Integer> name2IdMap = new HashMap<FileReference, Integer>();
+    private int idCounter = 0;
+
+    @Override
+    public FileReference lookupFileName(int fileId) throws HyracksDataException {
+        FileReference fRef = id2nameMap.get(fileId);
+        if (fRef == null) {
+            throw new HyracksDataException("No mapping found for id: " + fileId);
+        }
+        return fRef;
+    }
+
+    @Override
+    public int lookupFileId(FileReference fileRef) throws HyracksDataException {
+        Integer fileId = name2IdMap.get(fileRef);
+        if (fileId == null) {
+            throw new HyracksDataException("No mapping found for name: " + fileRef);
+        }
+        return fileId;
+    }
+
+    @Override
+    public boolean isMapped(FileReference fileRef) {
+        return name2IdMap.containsKey(fileRef);
+    }
+
+    @Override
+    public boolean isMapped(int fileId) {
+        return id2nameMap.containsKey(fileId);
+    }
+
+    @Override
+    public void unregisterFile(int fileId) throws HyracksDataException {
+        FileReference fileRef = id2nameMap.remove(fileId);
+        name2IdMap.remove(fileRef);
+    }
+
+    @Override
+    public void registerFile(FileReference fileRef) throws HyracksDataException {
+        Integer fileId = idCounter++;
+        id2nameMap.put(fileId, fileRef);
+        name2IdMap.put(fileRef, fileId);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientLocalResourceFactory.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientLocalResourceFactory.java
new file mode 100644
index 0000000..ffd3dff
--- /dev/null
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientLocalResourceFactory.java
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.common.file;
+
+public class TransientLocalResourceFactory implements ILocalResourceFactory {
+
+    @Override
+    public LocalResource createLocalResource(long resourceId, String resourceName, int partition) {
+        return new LocalResource(resourceId, resourceName, partition, LocalResource.TransientResource, null);
+    }
+}
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientLocalResourceFactoryProvider.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientLocalResourceFactoryProvider.java
new file mode 100644
index 0000000..d9a51a3
--- /dev/null
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientLocalResourceFactoryProvider.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.common.file;
+
+public class TransientLocalResourceFactoryProvider implements ILocalResourceFactoryProvider {
+    
+    private static final long serialVersionUID = 1L;
+
+    @Override
+    public ILocalResourceFactory getLocalResourceFactory() {
+        return new TransientLocalResourceFactory();
+    }
+}
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientLocalResourceRepository.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientLocalResourceRepository.java
new file mode 100644
index 0000000..55bd807
--- /dev/null
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientLocalResourceRepository.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.common.file;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public class TransientLocalResourceRepository implements ILocalResourceRepository {
+
+    private Map<String, LocalResource> name2ResourceMap = new HashMap<String, LocalResource>();
+    private Map<Long, LocalResource> id2ResourceMap = new HashMap<Long, LocalResource>();
+
+    @Override
+    public LocalResource getResourceById(long id) throws HyracksDataException {
+        return id2ResourceMap.get(id);
+    }
+
+    @Override
+    public LocalResource getResourceByName(String name) throws HyracksDataException {
+        return name2ResourceMap.get(name);
+    }
+
+    @Override
+    public synchronized void insert(LocalResource resource) throws HyracksDataException {
+        long id = resource.getResourceId();
+
+        if (id2ResourceMap.containsKey(id)) {
+            throw new HyracksDataException("Duplicate resource");
+        }
+        id2ResourceMap.put(id, resource);
+        name2ResourceMap.put(resource.getResourceName(), resource);
+    }
+
+    @Override
+    public synchronized void deleteResourceById(long id) throws HyracksDataException {
+        LocalResource resource = id2ResourceMap.get(id);
+        if (resource == null) {
+            throw new HyracksDataException("Resource doesn't exist");
+        }
+        id2ResourceMap.remove(id);
+        name2ResourceMap.remove(resource.getResourceName());
+    }
+
+    @Override
+    public synchronized void deleteResourceByName(String name) throws HyracksDataException {
+        LocalResource resource = name2ResourceMap.get(name);
+        if (resource == null) {
+            throw new HyracksDataException("Resource doesn't exist");
+        }
+        id2ResourceMap.remove(resource.getResourceId());
+        name2ResourceMap.remove(name);
+    }
+
+    @Override
+    public List<LocalResource> getAllResources() throws HyracksDataException {
+        List<LocalResource> resources = new ArrayList<LocalResource>();
+        for (LocalResource resource : id2ResourceMap.values()) {
+            resources.add(resource);
+        }
+        return resources;
+    }
+}
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientLocalResourceRepositoryFactory.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientLocalResourceRepositoryFactory.java
new file mode 100644
index 0000000..a6b00a4
--- /dev/null
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientLocalResourceRepositoryFactory.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.common.file;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public class TransientLocalResourceRepositoryFactory implements ILocalResourceRepositoryFactory {
+
+    @Override
+    public ILocalResourceRepository createRepository() throws HyracksDataException {
+        return new TransientLocalResourceRepository();
+    }
+}
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/smi/TransientFileMapManager.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/smi/TransientFileMapManager.java
deleted file mode 100644
index e4ddc08..0000000
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/smi/TransientFileMapManager.java
+++ /dev/null
@@ -1,57 +0,0 @@
-package edu.uci.ics.hyracks.storage.common.smi;
-
-import java.util.HashMap;
-import java.util.Map;
-
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.storage.common.file.IFileMapManager;
-
-public class TransientFileMapManager implements IFileMapManager {
-    private static final long serialVersionUID = 1L;
-
-    private Map<Integer, FileReference> id2nameMap = new HashMap<Integer, FileReference>();
-    private Map<FileReference, Integer> name2IdMap = new HashMap<FileReference, Integer>();
-    private int idCounter = 0;
-
-    @Override
-    public FileReference lookupFileName(int fileId) throws HyracksDataException {
-        FileReference fRef = id2nameMap.get(fileId);
-        if (fRef == null) {
-            throw new HyracksDataException("No mapping found for id: " + fileId);
-        }
-        return fRef;
-    }
-
-    @Override
-    public int lookupFileId(FileReference fileRef) throws HyracksDataException {
-        Integer fileId = name2IdMap.get(fileRef);
-        if (fileId == null) {
-            throw new HyracksDataException("No mapping found for name: " + fileRef);
-        }
-        return fileId;
-    }
-
-    @Override
-    public boolean isMapped(FileReference fileRef) {
-        return name2IdMap.containsKey(fileRef);
-    }
-
-    @Override
-    public boolean isMapped(int fileId) {
-        return id2nameMap.containsKey(fileId);
-    }
-
-    @Override
-    public void unregisterFile(int fileId) throws HyracksDataException {
-        FileReference fileRef = id2nameMap.remove(fileId);
-        name2IdMap.remove(fileRef);
-    }
-
-    @Override
-    public void registerFile(FileReference fileRef) throws HyracksDataException {
-        Integer fileId = idCounter++;
-        id2nameMap.put(fileId, fileRef);
-        name2IdMap.put(fileRef, fileId);
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-test-support/pom.xml b/hyracks/hyracks-test-support/pom.xml
index 1ddd1df..623edc4 100644
--- a/hyracks/hyracks-test-support/pom.xml
+++ b/hyracks/hyracks-test-support/pom.xml
@@ -1,14 +1,12 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-test-support</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-test-support</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -29,33 +27,33 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-nc</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-rtree</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-storage-am-invertedindex</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<artifactId>hyracks-storage-am-lsm-invertedindex</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/AbstractModificationOperationCallbackTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/AbstractModificationOperationCallbackTest.java
new file mode 100644
index 0000000..30843aa
--- /dev/null
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/AbstractModificationOperationCallbackTest.java
@@ -0,0 +1,84 @@
+package edu.uci.ics.hyracks.storage.am.btree;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+
+public abstract class AbstractModificationOperationCallbackTest extends AbstractOperationCallbackTest {
+
+    protected final ArrayTupleBuilder builder;
+    protected final ArrayTupleReference tuple;
+    protected final IModificationOperationCallback cb;
+
+    protected boolean isFoundNull;
+
+    public AbstractModificationOperationCallbackTest() {
+        this.builder = new ArrayTupleBuilder(NUM_KEY_FIELDS);
+        this.tuple = new ArrayTupleReference();
+        this.cb = new VeriyfingModificationCallback();
+        this.isFoundNull = true;
+    }
+
+    @Before
+    public void setup() throws Exception {
+        super.setup();
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        super.tearDown();
+    }
+
+    @Test
+    public void modificationCallbackTest() throws Exception {
+        IIndexAccessor accessor = index.createAccessor(cb, NoOpOperationCallback.INSTANCE);
+
+        isFoundNull = true;
+        for (int i = 0; i < AccessMethodTestsConfig.BTREE_NUM_TUPLES_TO_INSERT; i++) {
+            TupleUtils.createIntegerTuple(builder, tuple, i);
+            accessor.insert(tuple);
+        }
+
+        isFoundNull = false;
+        for (int i = 0; i < AccessMethodTestsConfig.BTREE_NUM_TUPLES_TO_INSERT; i++) {
+            TupleUtils.createIntegerTuple(builder, tuple, i);
+            accessor.upsert(tuple);
+        }
+
+        isFoundNull = false;
+        for (int i = 0; i < AccessMethodTestsConfig.BTREE_NUM_TUPLES_TO_INSERT; i++) {
+            TupleUtils.createIntegerTuple(builder, tuple, i);
+            accessor.delete(tuple);
+        }
+    }
+
+    private class VeriyfingModificationCallback implements IModificationOperationCallback {
+
+        @Override
+        public void before(ITupleReference tuple) {
+            Assert.assertEquals(0, cmp.compare(AbstractModificationOperationCallbackTest.this.tuple, tuple));
+        }
+
+        @Override
+        public void found(ITupleReference before, ITupleReference after) {
+            if (isFoundNull) {
+                Assert.assertEquals(null, before);
+            } else {
+                Assert.assertEquals(0, cmp.compare(AbstractModificationOperationCallbackTest.this.tuple, before));
+            }
+            Assert.assertEquals(0, cmp.compare(AbstractModificationOperationCallbackTest.this.tuple, after));
+        }
+
+    }
+
+}
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/AbstractOperationCallbackTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/AbstractOperationCallbackTest.java
new file mode 100644
index 0000000..41dfdfe
--- /dev/null
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/AbstractOperationCallbackTest.java
@@ -0,0 +1,40 @@
+package edu.uci.ics.hyracks.storage.am.btree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+
+public abstract class AbstractOperationCallbackTest {
+    protected static final int NUM_KEY_FIELDS = 1;
+
+    @SuppressWarnings("rawtypes")
+    protected final ISerializerDeserializer[] keySerdes;
+    protected final MultiComparator cmp;
+    protected final int[] bloomFilterKeyFields;
+
+    protected IIndex index;
+
+    protected abstract void createIndexInstance() throws Exception;
+
+    public AbstractOperationCallbackTest() {
+        this.keySerdes = new ISerializerDeserializer[] { IntegerSerializerDeserializer.INSTANCE };
+        this.cmp = MultiComparator.create(SerdeUtils.serdesToComparatorFactories(keySerdes, keySerdes.length));
+        bloomFilterKeyFields = new int[NUM_KEY_FIELDS];
+        for (int i = 0; i < NUM_KEY_FIELDS; ++i) {
+            bloomFilterKeyFields[i] = i;
+        }
+    }
+
+    public void setup() throws Exception {
+        createIndexInstance();
+        index.create();
+        index.activate();
+    }
+
+    public void tearDown() throws Exception {
+        index.deactivate();
+        index.destroy();
+    }
+}
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/AbstractSearchOperationCallbackTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/AbstractSearchOperationCallbackTest.java
new file mode 100644
index 0000000..ffa7c9a
--- /dev/null
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/AbstractSearchOperationCallbackTest.java
@@ -0,0 +1,230 @@
+package edu.uci.ics.hyracks.storage.am.btree;
+
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.locks.Condition;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+
+public abstract class AbstractSearchOperationCallbackTest extends AbstractOperationCallbackTest {
+    private static final int NUM_TASKS = 2;
+
+    protected final Lock lock;
+    protected final Condition condition;
+
+    protected ExecutorService executor;
+    protected boolean insertTaskStarted;
+
+    public AbstractSearchOperationCallbackTest() {
+        this.lock = new ReentrantLock(true);
+        this.condition = lock.newCondition();
+        this.insertTaskStarted = false;
+    }
+
+    @Before
+    public void setup() throws Exception {
+        executor = Executors.newFixedThreadPool(NUM_TASKS);
+        super.setup();
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        executor.shutdown();
+        super.tearDown();
+    }
+
+    @Test
+    public void searchCallbackTest() throws Exception {
+        Future<Boolean> insertFuture = executor.submit(new InsertionTask());
+        Future<Boolean> searchFuture = executor.submit(new SearchTask());
+        Assert.assertTrue(searchFuture.get());
+        Assert.assertTrue(insertFuture.get());
+    }
+
+    private class SearchTask implements Callable<Boolean> {
+        private final ISearchOperationCallback cb;
+        private final IIndexAccessor accessor;
+        private final IIndexCursor cursor;
+        private final RangePredicate predicate;
+        private final ArrayTupleBuilder builder;
+        private final ArrayTupleReference tuple;
+
+        private boolean blockOnHigh;
+        private int blockingValue;
+        private int expectedAfterBlock;
+
+        public SearchTask() {
+            this.cb = new SynchronizingSearchOperationCallback();
+            this.accessor = index.createAccessor(NoOpOperationCallback.INSTANCE, cb);
+            this.cursor = accessor.createSearchCursor();
+            this.predicate = new RangePredicate();
+            this.builder = new ArrayTupleBuilder(NUM_KEY_FIELDS);
+            this.tuple = new ArrayTupleReference();
+
+            this.blockOnHigh = false;
+            this.blockingValue = -1;
+            this.expectedAfterBlock = -1;
+        }
+
+        @Override
+        public Boolean call() throws Exception {
+            lock.lock();
+            try {
+                if (!insertTaskStarted) {
+                    condition.await();
+                }
+
+                // begin a search on [101, +inf), blocking on 101
+                TupleUtils.createIntegerTuple(builder, tuple, 101);
+                predicate.setLowKey(tuple, true);
+                predicate.setHighKey(null, true);
+                accessor.search(cursor, predicate);
+                consumeIntTupleRange(101, 101, true, 101);
+
+                // consume tuples [102, 152], blocking on 151
+                consumeIntTupleRange(102, 151, true, 152);
+
+                // consume tuples [153, 300]
+                consumeIntTupleRange(153, 300, false, -1);
+
+                cursor.close();
+            } finally {
+                lock.unlock();
+            }
+
+            return true;
+        }
+
+        private void consumeIntTupleRange(int begin, int end, boolean blockOnHigh, int expectedAfterBlock)
+                throws Exception {
+            if (end < begin) {
+                throw new IllegalArgumentException("Invalid range: [" + begin + ", " + end + "]");
+            }
+
+            for (int i = begin; i <= end; i++) {
+                if (blockOnHigh == true && i == end) {
+                    this.blockOnHigh = true;
+                    this.blockingValue = end;
+                    this.expectedAfterBlock = expectedAfterBlock;
+                }
+                TupleUtils.createIntegerTuple(builder, tuple, i);
+                if (!cursor.hasNext()) {
+                    Assert.fail("Failed to consume entire tuple range since cursor is exhausted.");
+                }
+                cursor.next();
+
+                if (this.blockOnHigh) {
+                    TupleUtils.createIntegerTuple(builder, tuple, expectedAfterBlock);
+                }
+                Assert.assertEquals(0, cmp.compare(tuple, cursor.getTuple()));
+            }
+        }
+
+        private class SynchronizingSearchOperationCallback implements ISearchOperationCallback {
+
+            @Override
+            public boolean proceed(ITupleReference tuple) {
+                Assert.assertEquals(0, cmp.compare(SearchTask.this.tuple, tuple));
+                return false;
+            }
+
+            @Override
+            public void reconcile(ITupleReference tuple) {
+                Assert.assertEquals(0, cmp.compare(SearchTask.this.tuple, tuple));
+                if (blockOnHigh) {
+                    try {
+                        TupleUtils.createIntegerTuple(builder, SearchTask.this.tuple, expectedAfterBlock);
+                    } catch (HyracksDataException e) {
+                        e.printStackTrace();
+                    }
+                    condition.signal();
+                    condition.awaitUninterruptibly();
+                    blockOnHigh = false;
+                }
+            }
+
+            @Override
+            public void cancel(ITupleReference tuple) {
+                try {
+                    TupleUtils.createIntegerTuple(builder, SearchTask.this.tuple, blockingValue);
+                    Assert.assertEquals(0, cmp.compare(tuple, SearchTask.this.tuple));
+                    TupleUtils.createIntegerTuple(builder, SearchTask.this.tuple, expectedAfterBlock);
+                } catch (HyracksDataException e) {
+                    e.printStackTrace();
+                }
+            }
+
+        }
+    }
+
+    private class InsertionTask implements Callable<Boolean> {
+        private final IIndexAccessor accessor;
+        private final ArrayTupleBuilder builder;
+        private final ArrayTupleReference tuple;
+
+        public InsertionTask() {
+            this.accessor = index.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            this.builder = new ArrayTupleBuilder(NUM_KEY_FIELDS);
+            this.tuple = new ArrayTupleReference();
+        }
+
+        @Override
+        public Boolean call() throws Exception {
+            lock.lock();
+            try {
+                insertTaskStarted = true;
+
+                // insert tuples [101, 200]
+                insertIntTupleRange(101, 200);
+                condition.signal();
+                condition.await();
+
+                // insert tuples [1, 100]
+                insertIntTupleRange(1, 100);
+                condition.signal();
+                condition.await();
+
+                // insert tuples [201, 300] and delete tuple 151
+                insertIntTupleRange(201, 300);
+                TupleUtils.createIntegerTuple(builder, tuple, 151);
+                accessor.delete(tuple);
+                condition.signal();
+            } finally {
+                lock.unlock();
+            }
+
+            return true;
+        }
+
+        private void insertIntTupleRange(int begin, int end) throws Exception {
+            if (end < begin) {
+                throw new IllegalArgumentException("Invalid range: [" + begin + ", " + end + "]");
+            }
+
+            for (int i = begin; i <= end; i++) {
+                TupleUtils.createIntegerTuple(builder, tuple, i);
+                accessor.insert(tuple);
+            }
+        }
+
+    }
+
+}
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexBulkLoadTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexBulkLoadTest.java
index 85bfdd2..6d7ee4d 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexBulkLoadTest.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexBulkLoadTest.java
@@ -38,6 +38,8 @@
             ITupleReference lowKey, ITupleReference highKey, ITupleReference prefixLowKey, ITupleReference prefixHighKey)
             throws Exception {
         OrderedIndexTestContext ctx = createTestContext(fieldSerdes, numKeys, leafType);
+        ctx.getIndex().create();
+        ctx.getIndex().activate();
         for (int i = 0; i < bulkLoadRounds; i++) {
             // We assume all fieldSerdes are of the same type. Check the first
             // one
@@ -55,9 +57,12 @@
                 orderedIndexTestUtils.checkRangeSearch(ctx, prefixLowKey, prefixHighKey, true, true);
             }
         }
-        ctx.getIndex().close();
-    }
 
+        ctx.getIndex().validate();
+        ctx.getIndex().deactivate();
+        ctx.getIndex().destroy();
+    }
+    
     @Override
     protected String getTestOpName() {
         return "BulkLoad";
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexDeleteTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexDeleteTest.java
index 93075a1..b96f252 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexDeleteTest.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexDeleteTest.java
@@ -20,6 +20,7 @@
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
 
 @SuppressWarnings("rawtypes")
 public abstract class OrderedIndexDeleteTest extends OrderedIndexTestDriver {
@@ -31,14 +32,16 @@
         this.orderedIndexTestUtils = new OrderedIndexTestUtils();
     }
 
-    private static final int numInsertRounds = 3;
-    private static final int numDeleteRounds = 3;
+    private static final int numInsertRounds = AccessMethodTestsConfig.BTREE_NUM_INSERT_ROUNDS;
+    private static final int numDeleteRounds = AccessMethodTestsConfig.BTREE_NUM_DELETE_ROUNDS;
 
     @Override
     protected void runTest(ISerializerDeserializer[] fieldSerdes, int numKeys, BTreeLeafFrameType leafType,
             ITupleReference lowKey, ITupleReference highKey, ITupleReference prefixLowKey, ITupleReference prefixHighKey)
             throws Exception {
         OrderedIndexTestContext ctx = createTestContext(fieldSerdes, numKeys, leafType);
+        ctx.getIndex().create();
+        ctx.getIndex().activate();
         for (int i = 0; i < numInsertRounds; i++) {
             // We assume all fieldSerdes are of the same type. Check the first
             // one to determine which field types to generate.
@@ -60,7 +63,10 @@
                 }
             }
         }
-        ctx.getIndex().close();
+
+        ctx.getIndex().validate();
+        ctx.getIndex().deactivate();
+        ctx.getIndex().destroy();
     }
 
     @Override
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexExamplesTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexExamplesTest.java
index a29be89..970526e 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexExamplesTest.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexExamplesTest.java
@@ -15,6 +15,8 @@
 
 package edu.uci.ics.hyracks.storage.am.btree;
 
+import static org.junit.Assert.fail;
+
 import java.util.Random;
 import java.util.logging.Level;
 import java.util.logging.Logger;
@@ -35,14 +37,16 @@
 import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
 import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeUtils;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoadContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
-import edu.uci.ics.hyracks.storage.am.common.impls.TreeDiskOrderScanCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.UnsortedInputException;
+import edu.uci.ics.hyracks.storage.am.common.impls.TreeIndexDiskOrderScanCursor;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 
 @SuppressWarnings("rawtypes")
@@ -50,17 +54,13 @@
     protected static final Logger LOGGER = Logger.getLogger(OrderedIndexExamplesTest.class.getName());
     protected final Random rnd = new Random(50);
 
-    protected abstract ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories)
-            throws TreeIndexException;
+    protected abstract ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories,
+            int[] bloomFilterKeyFields) throws TreeIndexException;
 
-    protected abstract int getIndexFileId();
-    
     /**
-     * Fixed-Length Key,Value Example.
-     * 
-     * Create a tree index with one fixed-length key field and one fixed-length value
-     * field. Fill index with random values using insertions (not bulk load).
-     * Perform scans and range search.
+     * Fixed-Length Key,Value Example. Create a tree index with one fixed-length
+     * key field and one fixed-length value field. Fill index with random values
+     * using insertions (not bulk load). Perform scans and range search.
      */
     @Test
     public void fixedLengthKeyValueExample() throws Exception {
@@ -82,10 +82,13 @@
         IBinaryComparatorFactory[] cmpFactories = new IBinaryComparatorFactory[keyFieldCount];
         cmpFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
 
-        int indexFileId = getIndexFileId();
-        ITreeIndex treeIndex = createTreeIndex(typeTraits, cmpFactories);
-        treeIndex.create(indexFileId);
-        treeIndex.open(indexFileId);
+        // This is only used for the LSM-BTree.
+        int[] bloomFilterKeyFields = new int[keyFieldCount];
+        bloomFilterKeyFields[0] = 0;
+
+        ITreeIndex treeIndex = createTreeIndex(typeTraits, cmpFactories, bloomFilterKeyFields);
+        treeIndex.create();
+        treeIndex.activate();
 
         long start = System.currentTimeMillis();
         if (LOGGER.isLoggable(Level.INFO)) {
@@ -93,7 +96,8 @@
         }
         ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
-        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor();
+        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
         int numInserts = 10000;
         for (int i = 0; i < numInserts; i++) {
             int f0 = rnd.nextInt() % numInserts;
@@ -129,15 +133,92 @@
 
         rangeSearch(cmpFactories, indexAccessor, fieldSerdes, lowKey, highKey);
 
-        treeIndex.close();
+        treeIndex.validate();
+        treeIndex.deactivate();
+        treeIndex.destroy();
     }
 
     /**
-     * Composite Key Example (Non-Unique Index).
-     * 
-     * Create a tree index with two fixed-length key fields and one fixed-length
-     * value field. Fill index with random values using insertions (not bulk
-     * load) Perform scans and range search.
+     * This test the btree page split. Originally this test didn't pass since
+     * the btree was spliting by cardinality and not size. Thus, we might end
+     * up with a situation where there is not enough space to insert the new
+     * tuple after the split which will throw an error and the split won't be
+     * propagated to upper level; thus, the tree is corrupted. Now, it split
+     * page by size. The correct behavior on abnormally large keys/values.
+     */
+    @Test
+    public void pageSplitTestExample() throws Exception {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("BTree page split test.");
+        }
+
+        // Declare fields.
+        int fieldCount = 2;
+        ITypeTraits[] typeTraits = new ITypeTraits[fieldCount];
+        typeTraits[0] = UTF8StringPointable.TYPE_TRAITS;
+        typeTraits[1] = UTF8StringPointable.TYPE_TRAITS;
+        // Declare field serdes.
+        ISerializerDeserializer[] fieldSerdes = { UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE };
+
+        // Declare keys.
+        int keyFieldCount = 1;
+        IBinaryComparatorFactory[] cmpFactories = new IBinaryComparatorFactory[keyFieldCount];
+        cmpFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
+
+        // This is only used for the LSM-BTree.
+        int[] bloomFilterKeyFields = new int[keyFieldCount];
+        bloomFilterKeyFields[0] = 0;
+
+        ITreeIndex treeIndex = createTreeIndex(typeTraits, cmpFactories, bloomFilterKeyFields);
+        treeIndex.create();
+        treeIndex.activate();
+
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
+        ArrayTupleReference tuple = new ArrayTupleReference();
+        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
+
+        String key = "111";
+        String data = "XXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, key, data);
+        indexAccessor.insert(tuple);
+
+        key = "222";
+        data = "XXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, key, data);
+        indexAccessor.insert(tuple);
+
+        key = "333";
+        data = "XXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, key, data);
+        indexAccessor.insert(tuple);
+
+        key = "444";
+        data = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, key, data);
+        indexAccessor.insert(tuple);
+
+        key = "555";
+        data = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, key, data);
+        indexAccessor.insert(tuple);
+
+        key = "666";
+        data = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, key, data);
+        indexAccessor.insert(tuple);
+
+        treeIndex.validate();
+        treeIndex.deactivate();
+        treeIndex.destroy();
+    }
+
+    /**
+     * Composite Key Example (Non-Unique Index). Create a tree index with two
+     * fixed-length key fields and one fixed-length value field. Fill index with
+     * random values using insertions (not bulk load) Perform scans and range
+     * search.
      */
     @Test
     public void twoFixedLengthKeysOneFixedLengthValueExample() throws Exception {
@@ -161,10 +242,14 @@
         cmpFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
         cmpFactories[1] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
 
-        int indexFileId = getIndexFileId();
-        ITreeIndex treeIndex = createTreeIndex(typeTraits, cmpFactories);
-        treeIndex.create(indexFileId);
-        treeIndex.open(indexFileId);
+        // This is only used for the LSM-BTree.
+        int[] bloomFilterKeyFields = new int[keyFieldCount];
+        bloomFilterKeyFields[0] = 0;
+        bloomFilterKeyFields[1] = 1;
+
+        ITreeIndex treeIndex = createTreeIndex(typeTraits, cmpFactories, bloomFilterKeyFields);
+        treeIndex.create();
+        treeIndex.activate();
 
         long start = System.currentTimeMillis();
         if (LOGGER.isLoggable(Level.INFO)) {
@@ -172,7 +257,8 @@
         }
         ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
-        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor();
+        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
         int numInserts = 10000;
         for (int i = 0; i < 10000; i++) {
             int f0 = rnd.nextInt() % 2000;
@@ -210,7 +296,9 @@
         // Prefix-Range search in [-3, 3]
         rangeSearch(cmpFactories, indexAccessor, fieldSerdes, lowKey, highKey);
 
-        treeIndex.close();
+        treeIndex.validate();
+        treeIndex.deactivate();
+        treeIndex.destroy();
     }
 
     /**
@@ -238,10 +326,13 @@
         IBinaryComparatorFactory[] cmpFactories = new IBinaryComparatorFactory[keyFieldCount];
         cmpFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
 
-        int indexFileId = getIndexFileId();
-        ITreeIndex treeIndex = createTreeIndex(typeTraits, cmpFactories);
-        treeIndex.create(indexFileId);
-        treeIndex.open(indexFileId);
+        // This is only used for the LSM-BTree.
+        int[] bloomFilterKeyFields = new int[keyFieldCount];
+        bloomFilterKeyFields[0] = 0;
+
+        ITreeIndex treeIndex = createTreeIndex(typeTraits, cmpFactories, bloomFilterKeyFields);
+        treeIndex.create();
+        treeIndex.activate();
 
         long start = System.currentTimeMillis();
         if (LOGGER.isLoggable(Level.INFO)) {
@@ -249,7 +340,8 @@
         }
         ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
-        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor();
+        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
         // Max string length to be generated.
         int maxLength = 10;
         int numInserts = 10000;
@@ -259,7 +351,7 @@
             TupleUtils.createTuple(tb, tuple, fieldSerdes, f0, f1);
             if (LOGGER.isLoggable(Level.INFO)) {
                 if (i % 1000 == 0) {
-                    LOGGER.info("Inserting " + f0 + " " + f1);
+                    LOGGER.info("Inserting[" + i + "] " + f0 + " " + f1);
                 }
             }
             try {
@@ -287,15 +379,16 @@
 
         rangeSearch(cmpFactories, indexAccessor, fieldSerdes, lowKey, highKey);
 
-        treeIndex.close();
+        treeIndex.validate();
+        treeIndex.deactivate();
+        treeIndex.destroy();
     }
 
     /**
-     * Deletion Example.
-     * 
-     * Create a BTree with one variable-length key field and one variable-length
-     * value field. Fill B-tree with random values using insertions, then delete
-     * entries one-by-one. Repeat procedure a few times on same BTree.
+     * Deletion Example. Create a BTree with one variable-length key field and
+     * one variable-length value field. Fill B-tree with random values using
+     * insertions, then delete entries one-by-one. Repeat procedure a few times
+     * on same BTree.
      */
     @Test
     public void deleteExample() throws Exception {
@@ -317,14 +410,18 @@
         IBinaryComparatorFactory[] cmpFactories = new IBinaryComparatorFactory[keyFieldCount];
         cmpFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
 
-        int indexFileId = getIndexFileId();
-        ITreeIndex treeIndex = createTreeIndex(typeTraits, cmpFactories);
-        treeIndex.create(indexFileId);
-        treeIndex.open(indexFileId);
+        // This is only used for the LSM-BTree.
+        int[] bloomFilterKeyFields = new int[keyFieldCount];
+        bloomFilterKeyFields[0] = 0;
+
+        ITreeIndex treeIndex = createTreeIndex(typeTraits, cmpFactories, bloomFilterKeyFields);
+        treeIndex.create();
+        treeIndex.activate();
 
         ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
-        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor();
+        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
         // Max string length to be generated.
         int runs = 3;
         for (int run = 0; run < runs; run++) {
@@ -388,15 +485,16 @@
                 break;
             }
         }
-        treeIndex.close();
+        treeIndex.validate();
+        treeIndex.deactivate();
+        treeIndex.destroy();
     }
 
     /**
-     * Update example.
-     * 
-     * Create a BTree with one variable-length key field and one variable-length
-     * value field. Fill B-tree with random values using insertions, then update
-     * entries one-by-one. Repeat procedure a few times on same BTree.
+     * Update example. Create a BTree with one variable-length key field and one
+     * variable-length value field. Fill B-tree with random values using
+     * insertions, then update entries one-by-one. Repeat procedure a few times
+     * on same BTree.
      */
     @Test
     public void updateExample() throws Exception {
@@ -418,15 +516,19 @@
         IBinaryComparatorFactory[] cmpFactories = new IBinaryComparatorFactory[keyFieldCount];
         cmpFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
 
-        int indexFileId = getIndexFileId();
-        ITreeIndex treeIndex = createTreeIndex(typeTraits, cmpFactories);
-        treeIndex.create(indexFileId);
-        treeIndex.open(indexFileId);
+        // This is only used for the LSM-BTree.
+        int[] bloomFilterKeyFields = new int[keyFieldCount];
+        bloomFilterKeyFields[0] = 0;
+
+        ITreeIndex treeIndex = createTreeIndex(typeTraits, cmpFactories, bloomFilterKeyFields);
+        treeIndex.create();
+        treeIndex.activate();
 
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("Inserting into tree...");
         }
-        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor();
+        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
         ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
         int maxLength = 10;
@@ -474,15 +576,14 @@
             // Do another scan after a round of updates.
             orderedScan(indexAccessor, fieldSerdes);
         }
-        treeIndex.close();
+        treeIndex.validate();
+        treeIndex.deactivate();
+        treeIndex.destroy();
     }
 
     /**
-     * Bulk load example.
-     * 
-     * Load a tree with 100,000 tuples. BTree has a composite key to "simulate"
-     * non-unique index creation.
-     * 
+     * Bulk load example. Load a tree with 100,000 tuples. BTree has a composite
+     * key to "simulate" non-unique index creation.
      */
     @Test
     public void bulkLoadExample() throws Exception {
@@ -505,10 +606,14 @@
         cmpFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
         cmpFactories[1] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
 
-        int indexFileId = getIndexFileId();
-        ITreeIndex treeIndex = createTreeIndex(typeTraits, cmpFactories);
-        treeIndex.create(indexFileId);
-        treeIndex.open(indexFileId);
+        // This is only used for the LSM-BTree.
+        int[] bloomFilterKeyFields = new int[keyFieldCount];
+        bloomFilterKeyFields[0] = 0;
+        bloomFilterKeyFields[1] = 1;
+
+        ITreeIndex treeIndex = createTreeIndex(typeTraits, cmpFactories, bloomFilterKeyFields);
+        treeIndex.create();
+        treeIndex.activate();
 
         // Load sorted records.
         int ins = 100000;
@@ -516,20 +621,21 @@
             LOGGER.info("Bulk loading " + ins + " tuples");
         }
         long start = System.currentTimeMillis();
-        IIndexBulkLoadContext bulkLoadCtx = treeIndex.beginBulkLoad(0.7f);
+        IIndexBulkLoader bulkLoader = treeIndex.createBulkLoader(0.7f, false, ins);
         ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
         for (int i = 0; i < ins; i++) {
             TupleUtils.createIntegerTuple(tb, tuple, i, i, 5);
-            treeIndex.bulkLoadAddTuple(tuple, bulkLoadCtx);
+            bulkLoader.add(tuple);
         }
-        treeIndex.endBulkLoad(bulkLoadCtx);
+        bulkLoader.end();
         long end = System.currentTimeMillis();
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info(ins + " tuples loaded in " + (end - start) + "ms");
         }
 
-        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor();
+        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
 
         // Build low key.
         ArrayTupleBuilder lowKeyTb = new ArrayTupleBuilder(1);
@@ -544,15 +650,85 @@
         // Prefix-Range search in [44444, 44500]
         rangeSearch(cmpFactories, indexAccessor, fieldSerdes, lowKey, highKey);
 
-        treeIndex.close();
+        treeIndex.validate();
+        treeIndex.deactivate();
+        treeIndex.destroy();
     }
 
-    private void orderedScan(IIndexAccessor indexAccessor, ISerializerDeserializer[] fieldSerdes)
-            throws Exception {
+    /**
+     * Bulk load failure example. Repeatedly loads a tree with 1,000 tuples, of
+     * which one tuple at each possible position does not conform to the
+     * expected order. We expect the bulk load to fail with an exception.
+     */
+    @Test
+    public void bulkOrderVerificationExample() throws Exception {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("Bulk load order verification example");
+        }
+        // Declare fields.
+        int fieldCount = 2;
+        ITypeTraits[] typeTraits = new ITypeTraits[fieldCount];
+        typeTraits[0] = IntegerPointable.TYPE_TRAITS;
+        typeTraits[1] = IntegerPointable.TYPE_TRAITS;
+
+        // declare keys
+        int keyFieldCount = 1;
+        IBinaryComparatorFactory[] cmpFactories = new IBinaryComparatorFactory[keyFieldCount];
+        cmpFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+
+        Random rnd = new Random();
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
+        ArrayTupleReference tuple = new ArrayTupleReference();
+
+        // This is only used for the LSM-BTree.
+        int[] bloomFilterKeyFields = new int[keyFieldCount];
+        bloomFilterKeyFields[0] = 0;
+
+        int ins = 1000;
+        for (int i = 1; i < ins; i++) {
+            ITreeIndex treeIndex = createTreeIndex(typeTraits, cmpFactories, bloomFilterKeyFields);
+            treeIndex.create();
+            treeIndex.activate();
+
+            // Load sorted records, and expect to fail at tuple i.
+            IIndexBulkLoader bulkLoader = treeIndex.createBulkLoader(0.7f, true, ins);
+            for (int j = 0; j < ins; j++) {
+                if (j > i) {
+                    fail("Bulk load failure test unexpectedly succeeded past tuple: " + j);
+                }
+                int key = j;
+                if (j == i) {
+                    int swapElementCase = Math.abs(rnd.nextInt()) % 2;
+                    if (swapElementCase == 0) {
+                        // Element equal to previous element.
+                        key--;
+                    } else {
+                        // Element smaller than previous element.
+                        key -= Math.abs(Math.random() % (ins - 1)) + 1;
+                    }
+                }
+                TupleUtils.createIntegerTuple(tb, tuple, key, 5);
+                try {
+                    bulkLoader.add(tuple);
+                } catch (UnsortedInputException e) {
+                    if (j != i) {
+                        fail("Unexpected exception: " + e.getMessage());
+                    }
+                    // Success.
+                    break;
+                }
+            }
+
+            treeIndex.deactivate();
+            treeIndex.destroy();
+        }
+    }
+
+    private void orderedScan(IIndexAccessor indexAccessor, ISerializerDeserializer[] fieldSerdes) throws Exception {
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("Ordered Scan:");
         }
-        IIndexCursor scanCursor = (IIndexCursor) indexAccessor.createSearchCursor();        
+        IIndexCursor scanCursor = (IIndexCursor) indexAccessor.createSearchCursor();
         RangePredicate nullPred = new RangePredicate(null, null, true, true, null, null);
         indexAccessor.search(scanCursor, nullPred);
         try {
@@ -569,45 +745,44 @@
         }
     }
 
-	private void diskOrderScan(IIndexAccessor indexAccessor,
-			ISerializerDeserializer[] fieldSerdes) throws Exception {
-		try {
-			if (LOGGER.isLoggable(Level.INFO)) {
-				LOGGER.info("Disk-Order Scan:");
-			}
-			ITreeIndexAccessor treeIndexAccessor = (ITreeIndexAccessor) indexAccessor;
-			TreeDiskOrderScanCursor diskOrderCursor = (TreeDiskOrderScanCursor) treeIndexAccessor
-					.createDiskOrderScanCursor();
-			treeIndexAccessor.diskOrderScan(diskOrderCursor);
-			try {
-				while (diskOrderCursor.hasNext()) {
-					diskOrderCursor.next();
-					ITupleReference frameTuple = diskOrderCursor.getTuple();
-					String rec = TupleUtils.printTuple(frameTuple, fieldSerdes);
-					if (LOGGER.isLoggable(Level.INFO)) {
-						LOGGER.info(rec);
-					}
-				}
-			} finally {
-				diskOrderCursor.close();
-			}
-		} catch (UnsupportedOperationException e) {
-			// Ignore exception because some indexes, e.g. the LSMBTree, don't
-			// support disk-order scan.
-			if (LOGGER.isLoggable(Level.INFO)) {
-				LOGGER.info("Ignoring disk-order scan since it's not supported.");
-			}
-		} catch (ClassCastException e) {
-			// Ignore exception because IIndexAccessor sometimes isn't
-			// an ITreeIndexAccessor, e.g., for the LSMBTree.
-			if (LOGGER.isLoggable(Level.INFO)) {
-				LOGGER.info("Ignoring disk-order scan since it's not supported.");
-			}
-		}
-	}
+    private void diskOrderScan(IIndexAccessor indexAccessor, ISerializerDeserializer[] fieldSerdes) throws Exception {
+        try {
+            if (LOGGER.isLoggable(Level.INFO)) {
+                LOGGER.info("Disk-Order Scan:");
+            }
+            ITreeIndexAccessor treeIndexAccessor = (ITreeIndexAccessor) indexAccessor;
+            TreeIndexDiskOrderScanCursor diskOrderCursor = (TreeIndexDiskOrderScanCursor) treeIndexAccessor
+                    .createDiskOrderScanCursor();
+            treeIndexAccessor.diskOrderScan(diskOrderCursor);
+            try {
+                while (diskOrderCursor.hasNext()) {
+                    diskOrderCursor.next();
+                    ITupleReference frameTuple = diskOrderCursor.getTuple();
+                    String rec = TupleUtils.printTuple(frameTuple, fieldSerdes);
+                    if (LOGGER.isLoggable(Level.INFO)) {
+                        LOGGER.info(rec);
+                    }
+                }
+            } finally {
+                diskOrderCursor.close();
+            }
+        } catch (UnsupportedOperationException e) {
+            // Ignore exception because some indexes, e.g. the LSMBTree, don't
+            // support disk-order scan.
+            if (LOGGER.isLoggable(Level.INFO)) {
+                LOGGER.info("Ignoring disk-order scan since it's not supported.");
+            }
+        } catch (ClassCastException e) {
+            // Ignore exception because IIndexAccessor sometimes isn't
+            // an ITreeIndexAccessor, e.g., for the LSMBTree.
+            if (LOGGER.isLoggable(Level.INFO)) {
+                LOGGER.info("Ignoring disk-order scan since it's not supported.");
+            }
+        }
+    }
 
-    private void rangeSearch(IBinaryComparatorFactory[] cmpFactories, IIndexAccessor indexAccessor, ISerializerDeserializer[] fieldSerdes,
-            ITupleReference lowKey, ITupleReference highKey) throws Exception {
+    private void rangeSearch(IBinaryComparatorFactory[] cmpFactories, IIndexAccessor indexAccessor,
+            ISerializerDeserializer[] fieldSerdes, ITupleReference lowKey, ITupleReference highKey) throws Exception {
         if (LOGGER.isLoggable(Level.INFO)) {
             String lowKeyString = TupleUtils.printTuple(lowKey, fieldSerdes);
             String highKeyString = TupleUtils.printTuple(highKey, fieldSerdes);
@@ -616,8 +791,7 @@
         ITreeIndexCursor rangeCursor = (ITreeIndexCursor) indexAccessor.createSearchCursor();
         MultiComparator lowKeySearchCmp = BTreeUtils.getSearchMultiComparator(cmpFactories, lowKey);
         MultiComparator highKeySearchCmp = BTreeUtils.getSearchMultiComparator(cmpFactories, highKey);
-        RangePredicate rangePred = new RangePredicate(lowKey, highKey, true, true, lowKeySearchCmp,
-                highKeySearchCmp);
+        RangePredicate rangePred = new RangePredicate(lowKey, highKey, true, true, lowKeySearchCmp, highKeySearchCmp);
         indexAccessor.search(rangeCursor, rangePred);
         try {
             while (rangeCursor.hasNext()) {
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexInsertTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexInsertTest.java
index d12603b..32b597c 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexInsertTest.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexInsertTest.java
@@ -24,12 +24,10 @@
 /**
  * Tests the BTree insert operation with strings and integer fields using
  * various numbers of key and payload fields.
- * 
  * Each tests first fills a BTree with randomly generated tuples. We compare the
  * following operations against expected results: 1. Point searches for all
  * tuples. 2. Ordered scan. 3. Disk-order scan. 4. Range search (and prefix
  * search for composite keys).
- * 
  */
 @SuppressWarnings("rawtypes")
 public abstract class OrderedIndexInsertTest extends OrderedIndexTestDriver {
@@ -46,6 +44,8 @@
             ITupleReference lowKey, ITupleReference highKey, ITupleReference prefixLowKey, ITupleReference prefixHighKey)
             throws Exception {
         OrderedIndexTestContext ctx = createTestContext(fieldSerdes, numKeys, leafType);
+        ctx.getIndex().create();
+        ctx.getIndex().activate();
         // We assume all fieldSerdes are of the same type. Check the first one
         // to determine which field types to generate.
         if (fieldSerdes[0] instanceof IntegerSerializerDeserializer) {
@@ -62,7 +62,10 @@
         if (prefixLowKey != null && prefixHighKey != null) {
             orderedIndexTestUtils.checkRangeSearch(ctx, prefixLowKey, prefixHighKey, true, true);
         }
-        ctx.getIndex().close();
+
+        ctx.getIndex().validate();
+        ctx.getIndex().deactivate();
+        ctx.getIndex().destroy();
     }
 
     @Override
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexMultiThreadTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexMultiThreadTest.java
index 3a894a2..fa22f6b 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexMultiThreadTest.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexMultiThreadTest.java
@@ -29,95 +29,98 @@
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
-import edu.uci.ics.hyracks.storage.am.common.ITreeIndexTestWorkerFactory;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestWorkerFactory;
+import edu.uci.ics.hyracks.storage.am.common.IndexMultiThreadTestDriver;
 import edu.uci.ics.hyracks.storage.am.common.TestWorkloadConf;
-import edu.uci.ics.hyracks.storage.am.common.TreeIndexMultiThreadTestDriver;
-import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
 
 @SuppressWarnings("rawtypes")
-public abstract class OrderedIndexMultiThreadTest {    
-    
+public abstract class OrderedIndexMultiThreadTest {
+
     protected final Logger LOGGER = Logger.getLogger(OrderedIndexMultiThreadTest.class.getName());
-    
+
     // Machine-specific number of threads to use for testing.
     protected final int REGULAR_NUM_THREADS = Runtime.getRuntime().availableProcessors();
     // Excessive number of threads for testing.
     protected final int EXCESSIVE_NUM_THREADS = Runtime.getRuntime().availableProcessors() * 4;
-    protected final int NUM_OPERATIONS = 10000;
-    
-    protected ArrayList<TestWorkloadConf> workloadConfs = getTestWorkloadConf();    
-    
-    protected abstract void setUp() throws HyracksException;
-    
-    protected abstract void tearDown() throws HyracksDataException;        
+    protected final int NUM_OPERATIONS = AccessMethodTestsConfig.BTREE_MULTITHREAD_NUM_OPERATIONS;
 
-    protected abstract ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories) throws TreeIndexException;
-    
-    protected abstract int getFileId();
-    
-    protected abstract ITreeIndexTestWorkerFactory getWorkerFactory();
-    
+    protected ArrayList<TestWorkloadConf> workloadConfs = getTestWorkloadConf();
+
+    protected abstract void setUp() throws HyracksException;
+
+    protected abstract void tearDown() throws HyracksDataException;
+
+    protected abstract IIndex createIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories,
+            int[] bloomFilterKeyFields) throws TreeIndexException;
+
+    protected abstract IIndexTestWorkerFactory getWorkerFactory();
+
     protected abstract ArrayList<TestWorkloadConf> getTestWorkloadConf();
-    
+
     protected abstract String getIndexTypeName();
-    
-    protected static float[] getUniformOpProbs(TestOperation[] ops) {
-        float[] opProbs = new float[ops.length];
-        for (int i = 0; i < ops.length; i++) {
-            opProbs[i] = 1.0f / (float) ops.length;
-        }
-        return opProbs;
-    }
-    
-    protected void runTest(ISerializerDeserializer[] fieldSerdes, int numKeys, int numThreads, TestWorkloadConf conf, String dataMsg) throws InterruptedException, TreeIndexException, HyracksException {
+
+    protected void runTest(ISerializerDeserializer[] fieldSerdes, int numKeys, int numThreads, TestWorkloadConf conf,
+            String dataMsg) throws InterruptedException, TreeIndexException, HyracksException {
         setUp();
-        
+
         if (LOGGER.isLoggable(Level.INFO)) {
-        	String indexTypeName = getIndexTypeName();
-            LOGGER.info(indexTypeName + " MultiThread Test:\nData: " + dataMsg + "; Threads: " + numThreads + "; Workload: " + conf.toString() + ".");
+            String indexTypeName = getIndexTypeName();
+            LOGGER.info(indexTypeName + " MultiThread Test:\nData: " + dataMsg + "; Threads: " + numThreads
+                    + "; Workload: " + conf.toString() + ".");
         }
-        
+
         ITypeTraits[] typeTraits = SerdeUtils.serdesToTypeTraits(fieldSerdes);
-        IBinaryComparatorFactory[] cmpFactories = SerdeUtils.serdesToComparatorFactories(fieldSerdes, numKeys);     
-        
-        ITreeIndex index = createTreeIndex(typeTraits, cmpFactories);
-        ITreeIndexTestWorkerFactory workerFactory = getWorkerFactory();
-        
+        IBinaryComparatorFactory[] cmpFactories = SerdeUtils.serdesToComparatorFactories(fieldSerdes, numKeys);
+
+        // This is only used for the LSM-BTree.
+        int[] bloomFilterKeyFields = new int[numKeys];
+        for (int i = 0; i < numKeys; ++i) {
+            bloomFilterKeyFields[i] = i;
+        }
+
+        IIndex index = createIndex(typeTraits, cmpFactories, bloomFilterKeyFields);
+        IIndexTestWorkerFactory workerFactory = getWorkerFactory();
+
         // 4 batches per thread.
         int batchSize = (NUM_OPERATIONS / numThreads) / 4;
-        
-        TreeIndexMultiThreadTestDriver driver = new TreeIndexMultiThreadTestDriver(index, workerFactory, fieldSerdes, conf.ops, conf.opProbs);
-        driver.init(getFileId());
+
+        IndexMultiThreadTestDriver driver = new IndexMultiThreadTestDriver(index, workerFactory, fieldSerdes, conf.ops,
+                conf.opProbs);
+        driver.init();
         long[] times = driver.run(numThreads, 1, NUM_OPERATIONS, batchSize);
+        index.validate();
         driver.deinit();
-        
+
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("BTree MultiThread Test Time: " + times[0] + "ms");
         }
-        
+
         tearDown();
     }
-    
+
     @Test
-    public void oneIntKeyAndValue() throws InterruptedException, TreeIndexException, HyracksException {        
-        ISerializerDeserializer[] fieldSerdes = new ISerializerDeserializer[] { IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE };
+    public void oneIntKeyAndValue() throws InterruptedException, TreeIndexException, HyracksException {
+        ISerializerDeserializer[] fieldSerdes = new ISerializerDeserializer[] { IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE };
         int numKeys = 1;
         String dataMsg = "One Int Key And Value";
-        
+
         for (TestWorkloadConf conf : workloadConfs) {
             runTest(fieldSerdes, numKeys, REGULAR_NUM_THREADS, conf, dataMsg);
             runTest(fieldSerdes, numKeys, EXCESSIVE_NUM_THREADS, conf, dataMsg);
         }
     }
-    
+
     @Test
-    public void oneStringKeyAndValue() throws InterruptedException, TreeIndexException, HyracksException {        
-        ISerializerDeserializer[] fieldSerdes = new ISerializerDeserializer[] { UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE };
+    public void oneStringKeyAndValue() throws InterruptedException, TreeIndexException, HyracksException {
+        ISerializerDeserializer[] fieldSerdes = new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE };
         int numKeys = 1;
         String dataMsg = "One String Key And Value";
-        
+
         for (TestWorkloadConf conf : workloadConfs) {
             runTest(fieldSerdes, numKeys, REGULAR_NUM_THREADS, conf, dataMsg);
             runTest(fieldSerdes, numKeys, EXCESSIVE_NUM_THREADS, conf, dataMsg);
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexTestContext.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexTestContext.java
index f75a1f1..4ab0e87 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexTestContext.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexTestContext.java
@@ -20,16 +20,16 @@
 
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.storage.am.common.CheckTuple;
-import edu.uci.ics.hyracks.storage.am.common.TreeIndexTestContext;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.IndexTestContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 
 @SuppressWarnings("rawtypes")
-public abstract class OrderedIndexTestContext extends TreeIndexTestContext<CheckTuple> {
+public abstract class OrderedIndexTestContext extends IndexTestContext<CheckTuple> {
 
     protected final TreeSet<CheckTuple> checkTuples = new TreeSet<CheckTuple>();
 
-    public OrderedIndexTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) {
-        super(fieldSerdes, treeIndex);
+    public OrderedIndexTestContext(ISerializerDeserializer[] fieldSerdes, IIndex index) {
+        super(fieldSerdes, index);
     }
 
     public void upsertCheckTuple(CheckTuple checkTuple, Collection<CheckTuple> checkTuples) {
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexTestDriver.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexTestDriver.java
index 8daa5e0..ef2ee0b 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexTestDriver.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexTestDriver.java
@@ -27,12 +27,13 @@
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
 
 @SuppressWarnings("rawtypes")
 public abstract class OrderedIndexTestDriver {
     protected final Logger LOGGER = Logger.getLogger(OrderedIndexTestDriver.class.getName());
 
-    protected static final int numTuplesToInsert = 10000;
+    protected static final int numTuplesToInsert = AccessMethodTestsConfig.BTREE_NUM_TUPLES_TO_INSERT;
 
     protected abstract OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
             BTreeLeafFrameType leafType) throws Exception;
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexTestUtils.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexTestUtils.java
index a053dde..04c64fe 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexTestUtils.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexTestUtils.java
@@ -7,8 +7,8 @@
 import java.io.DataInputStream;
 import java.util.Collection;
 import java.util.Iterator;
-import java.util.NavigableSet;
 import java.util.Random;
+import java.util.SortedSet;
 import java.util.TreeSet;
 import java.util.logging.Level;
 import java.util.logging.Logger;
@@ -25,7 +25,7 @@
 import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeUtils;
 import edu.uci.ics.hyracks.storage.am.common.CheckTuple;
-import edu.uci.ics.hyracks.storage.am.common.ITreeIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestContext;
 import edu.uci.ics.hyracks.storage.am.common.TreeIndexTestUtils;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
@@ -43,47 +43,36 @@
                     actual.getFieldLength(i));
             DataInput dataIn = new DataInputStream(inStream);
             Object actualObj = fieldSerdes[i].deserialize(dataIn);
-            if (!actualObj.equals(expected.get(i))) {
-                fail("Actual and expected fields do not match on field " + i + ".\nExpected: " + expected.get(i)
+            if (!actualObj.equals(expected.getField(i))) {
+                fail("Actual and expected fields do not match on field " + i + ".\nExpected: " + expected.getField(i)
                         + "\nActual  : " + actualObj);
             }
         }
     }
 
     @SuppressWarnings("unchecked")
-    // Create a new TreeSet containing the elements satisfying the prefix
-    // search.
+    // Create a new TreeSet containing the elements satisfying the prefix search.
     // Implementing prefix search by changing compareTo() in CheckTuple does not
     // work.
-    public static TreeSet<CheckTuple> getPrefixExpectedSubset(TreeSet<CheckTuple> checkTuples, CheckTuple lowKey,
+    public static SortedSet<CheckTuple> getPrefixExpectedSubset(TreeSet<CheckTuple> checkTuples, CheckTuple lowKey,
             CheckTuple highKey) {
-        TreeSet<CheckTuple> expectedSubset = new TreeSet<CheckTuple>();
-        Iterator<CheckTuple> iter = checkTuples.iterator();
-        while (iter.hasNext()) {
-            CheckTuple t = iter.next();
-            boolean geLowKey = true;
-            boolean leHighKey = true;
-            for (int i = 0; i < lowKey.getNumKeys(); i++) {
-                if (t.get(i).compareTo(lowKey.get(i)) < 0) {
-                    geLowKey = false;
-                    break;
-                }
-            }
-            for (int i = 0; i < highKey.getNumKeys(); i++) {
-                if (t.get(i).compareTo(highKey.get(i)) > 0) {
-                    leHighKey = false;
-                    break;
-                }
-            }
-            if (geLowKey && leHighKey) {
-                expectedSubset.add(t);
-            }
+        lowKey.setIsHighKey(false);
+        highKey.setIsHighKey(true);
+        CheckTuple low = checkTuples.ceiling(lowKey);
+        CheckTuple high = checkTuples.floor(highKey);
+        if (low == null || high == null) {
+            // Must be empty.
+            return new TreeSet<CheckTuple>();
         }
-        return expectedSubset;
+        if (high.compareTo(low) < 0) {
+            // Must be empty.
+            return new TreeSet<CheckTuple>();
+        }
+        return checkTuples.subSet(low, true, high, true);
     }
 
     @SuppressWarnings("unchecked")
-    public void checkRangeSearch(ITreeIndexTestContext ctx, ITupleReference lowKey, ITupleReference highKey,
+    public void checkRangeSearch(IIndexTestContext ctx, ITupleReference lowKey, ITupleReference highKey,
             boolean lowKeyInclusive, boolean highKeyInclusive) throws Exception {
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("Testing Range Search.");
@@ -99,7 +88,7 @@
         CheckTuple lowKeyCheck = createCheckTupleFromTuple(lowKey, ctx.getFieldSerdes(), lowKeyCmp.getKeyFieldCount());
         CheckTuple highKeyCheck = createCheckTupleFromTuple(highKey, ctx.getFieldSerdes(),
                 highKeyCmp.getKeyFieldCount());
-        NavigableSet<CheckTuple> expectedSubset = null;
+        SortedSet<CheckTuple> expectedSubset = null;
         if (lowKeyCmp.getKeyFieldCount() < ctx.getKeyFieldCount()
                 || highKeyCmp.getKeyFieldCount() < ctx.getKeyFieldCount()) {
             // Searching on a key prefix (low key or high key or both).
@@ -132,7 +121,7 @@
         }
     }
 
-    public void checkPointSearches(ITreeIndexTestContext ictx) throws Exception {
+    public void checkPointSearches(IIndexTestContext ictx) throws Exception {
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("Testing Point Searches On All Expected Keys.");
         }
@@ -177,7 +166,7 @@
     }
 
     @SuppressWarnings("unchecked")
-    public void insertStringTuples(ITreeIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
+    public void insertStringTuples(IIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
         int fieldCount = ctx.getFieldCount();
         int numKeyFields = ctx.getKeyFieldCount();
         String[] fieldValues = new String[fieldCount];
@@ -207,10 +196,10 @@
             }
         }
     }
-    
-    public void upsertStringTuples(ITreeIndexTestContext ictx, int numTuples, Random rnd) throws Exception {
-    	OrderedIndexTestContext ctx = (OrderedIndexTestContext) ictx;
-    	int fieldCount = ctx.getFieldCount();
+
+    public void upsertStringTuples(IIndexTestContext ictx, int numTuples, Random rnd) throws Exception {
+        OrderedIndexTestContext ctx = (OrderedIndexTestContext) ictx;
+        int fieldCount = ctx.getFieldCount();
         int numKeyFields = ctx.getKeyFieldCount();
         String[] fieldValues = new String[fieldCount];
         for (int i = 0; i < numTuples; i++) {
@@ -235,7 +224,7 @@
     }
 
     @SuppressWarnings("unchecked")
-    public void bulkLoadStringTuples(ITreeIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
+    public void bulkLoadStringTuples(IIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
         int fieldCount = ctx.getFieldCount();
         int numKeyFields = ctx.getKeyFieldCount();
         String[] fieldValues = new String[fieldCount];
@@ -262,9 +251,9 @@
         }
     }
 
-    public void upsertIntTuples(ITreeIndexTestContext ictx, int numTuples, Random rnd) throws Exception {
+    public void upsertIntTuples(IIndexTestContext ictx, int numTuples, Random rnd) throws Exception {
         OrderedIndexTestContext ctx = (OrderedIndexTestContext) ictx;
-    	int fieldCount = ctx.getFieldCount();
+        int fieldCount = ctx.getFieldCount();
         int numKeyFields = ctx.getKeyFieldCount();
         int[] fieldValues = new int[ctx.getFieldCount()];
         // Scale range of values according to number of keys.
@@ -286,9 +275,9 @@
             ctx.upsertCheckTuple(createIntCheckTuple(fieldValues, ctx.getKeyFieldCount()), ctx.getCheckTuples());
         }
     }
-    
+
     @SuppressWarnings("unchecked")
-    public void updateTuples(ITreeIndexTestContext ictx, int numTuples, Random rnd) throws Exception {
+    public void updateTuples(IIndexTestContext ictx, int numTuples, Random rnd) throws Exception {
         OrderedIndexTestContext ctx = (OrderedIndexTestContext) ictx;
         int fieldCount = ctx.getFieldCount();
         int keyFieldCount = ctx.getKeyFieldCount();
@@ -317,7 +306,7 @@
             // Update check tuple's non-key fields.
             for (int j = keyFieldCount; j < fieldCount; j++) {
                 Comparable newValue = getRandomUpdateValue(ctx.getFieldSerdes()[j], rnd);
-                checkTuple.set(j, newValue);
+                checkTuple.setField(j, newValue);
             }
 
             createTupleFromCheckTuple(checkTuple, updateTupleBuilder, updateTuple, ctx.getFieldSerdes());
@@ -334,7 +323,7 @@
     public CheckTuple createStringCheckTuple(String[] fieldValues, int numKeyFields) {
         CheckTuple<String> checkTuple = new CheckTuple<String>(fieldValues.length, numKeyFields);
         for (String s : fieldValues) {
-            checkTuple.add((String) s);
+            checkTuple.appendField((String) s);
         }
         return checkTuple;
     }
@@ -396,7 +385,7 @@
     protected CheckTuple createIntCheckTuple(int[] fieldValues, int numKeyFields) {
         CheckTuple<Integer> checkTuple = new CheckTuple<Integer>(fieldValues.length, numKeyFields);
         for (int v : fieldValues) {
-            checkTuple.add(v);
+            checkTuple.appendField(v);
         }
         return checkTuple;
     }
@@ -421,12 +410,12 @@
     }
 
     @Override
-    protected ArrayTupleBuilder createDeleteTupleBuilder(ITreeIndexTestContext ctx) {
+    protected ArrayTupleBuilder createDeleteTupleBuilder(IIndexTestContext ctx) {
         return new ArrayTupleBuilder(ctx.getKeyFieldCount());
     }
 
     @Override
-    protected boolean checkDiskOrderScanResult(ITupleReference tuple, CheckTuple checkTuple, ITreeIndexTestContext ctx)
+    protected boolean checkDiskOrderScanResult(ITupleReference tuple, CheckTuple checkTuple, IIndexTestContext ctx)
             throws HyracksDataException {
         @SuppressWarnings("unchecked")
         TreeSet<CheckTuple> checkTuples = (TreeSet<CheckTuple>) ctx.getCheckTuples();
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexUpdateTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexUpdateTest.java
index 65b2ade..049724e 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexUpdateTest.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexUpdateTest.java
@@ -20,6 +20,7 @@
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
 
 @SuppressWarnings("rawtypes")
 public abstract class OrderedIndexUpdateTest extends OrderedIndexTestDriver {
@@ -31,7 +32,7 @@
         this.orderedIndexTestUtils = new OrderedIndexTestUtils();
     }
 
-    private static final int numUpdateRounds = 3;
+    private static final int numUpdateRounds = AccessMethodTestsConfig.BTREE_NUM_UPDATE_ROUNDS;
 
     @Override
     protected void runTest(ISerializerDeserializer[] fieldSerdes, int numKeys, BTreeLeafFrameType leafType,
@@ -42,6 +43,8 @@
             return;
         }
         OrderedIndexTestContext ctx = createTestContext(fieldSerdes, numKeys, leafType);
+        ctx.getIndex().create();
+        ctx.getIndex().activate();
         // We assume all fieldSerdes are of the same type. Check the first one
         // to determine which field types to generate.
         if (fieldSerdes[0] instanceof IntegerSerializerDeserializer) {
@@ -60,6 +63,10 @@
                 orderedIndexTestUtils.checkRangeSearch(ctx, prefixLowKey, prefixHighKey, true, true);
             }
         }
+
+        ctx.getIndex().validate();
+        ctx.getIndex().deactivate();
+        ctx.getIndex().destroy();
     }
 
     @Override
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexUpsertTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexUpsertTest.java
index 0d94a18..d34928f 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexUpsertTest.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/OrderedIndexUpsertTest.java
@@ -24,12 +24,10 @@
 /**
  * Tests the BTree insert operation with strings and integer fields using
  * various numbers of key and payload fields.
- * 
  * Each tests first fills a BTree with randomly generated tuples. We compare the
  * following operations against expected results: 1. Point searches for all
  * tuples. 2. Ordered scan. 3. Disk-order scan. 4. Range search (and prefix
  * search for composite keys).
- * 
  */
 @SuppressWarnings("rawtypes")
 public abstract class OrderedIndexUpsertTest extends OrderedIndexTestDriver {
@@ -46,6 +44,8 @@
             ITupleReference lowKey, ITupleReference highKey, ITupleReference prefixLowKey, ITupleReference prefixHighKey)
             throws Exception {
         OrderedIndexTestContext ctx = createTestContext(fieldSerdes, numKeys, leafType);
+        ctx.getIndex().create();
+        ctx.getIndex().activate();
         // We assume all fieldSerdes are of the same type. Check the first one
         // to determine which field types to generate.
         if (fieldSerdes[0] instanceof IntegerSerializerDeserializer) {
@@ -62,7 +62,9 @@
         if (prefixLowKey != null && prefixHighKey != null) {
             orderedIndexTestUtils.checkRangeSearch(ctx, prefixLowKey, prefixHighKey, true, true);
         }
-        ctx.getIndex().close();
+        ctx.getIndex().validate();
+        ctx.getIndex().deactivate();
+        ctx.getIndex().destroy();
     }
 
     @Override
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/AbstractIndexLifecycleTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/AbstractIndexLifecycleTest.java
new file mode 100644
index 0000000..2226d94
--- /dev/null
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/AbstractIndexLifecycleTest.java
@@ -0,0 +1,96 @@
+package edu.uci.ics.hyracks.storage.am.common;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+
+public abstract class AbstractIndexLifecycleTest {
+
+    protected IIndex index;
+
+    protected abstract boolean persistentStateExists() throws Exception;
+
+    protected abstract boolean isEmptyIndex() throws Exception;
+
+    protected abstract void performInsertions() throws Exception;
+
+    protected abstract void checkInsertions() throws Exception;
+
+    protected abstract void clearCheckableInsertions() throws Exception;
+
+    @Before
+    public abstract void setup() throws Exception;
+
+    @After
+    public abstract void tearDown() throws Exception;
+
+    @Test
+    public void validSequenceTest() throws Exception {
+        // Double create is valid
+        index.create();
+        Assert.assertTrue(persistentStateExists());
+        index.create();
+        Assert.assertTrue(persistentStateExists());
+
+        // Double open is valid
+        index.activate();
+        index.activate();
+        Assert.assertTrue(isEmptyIndex());
+
+        // Insert some stuff
+        performInsertions();
+        checkInsertions();
+
+        // Check that the inserted stuff isn't there
+        clearCheckableInsertions();
+        index.clear();
+        Assert.assertTrue(isEmptyIndex());
+
+        // Insert more stuff
+        performInsertions();
+
+        // Double close is valid
+        index.deactivate();
+        index.deactivate();
+
+        // Check that the inserted stuff is still there
+        index.activate();
+        checkInsertions();
+        index.deactivate();
+
+        // Double destroy is valid
+        index.destroy();
+        Assert.assertFalse(persistentStateExists());
+        index.destroy();
+        Assert.assertFalse(persistentStateExists());
+    }
+
+    @Test(expected = HyracksDataException.class)
+    public void invalidSequenceTest1() throws Exception {
+        index.create();
+        index.activate();
+        index.create();
+    }
+
+    @Test(expected = HyracksDataException.class)
+    public void invalidSequenceTest2() throws Exception {
+        index.create();
+        index.activate();
+        index.destroy();
+    }
+
+    @Test(expected = HyracksDataException.class)
+    public void invalidSequenceTest3() throws Exception {
+        index.create();
+        index.clear();
+    }
+
+    @Test(expected = HyracksDataException.class)
+    public void invalidSequenceTest4() throws Exception {
+        index.clear();
+    }
+}
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/AbstractIndexTestWorker.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/AbstractIndexTestWorker.java
new file mode 100644
index 0000000..f9ff26a
--- /dev/null
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/AbstractIndexTestWorker.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common;
+
+import java.util.Random;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+import edu.uci.ics.hyracks.storage.am.common.datagen.TupleBatch;
+
+public abstract class AbstractIndexTestWorker extends Thread implements ITreeIndexTestWorker {
+    private final Random rnd;
+    private final DataGenThread dataGen;
+    private final TestOperationSelector opSelector;
+    private final int numBatches;
+
+    protected final IIndexAccessor indexAccessor;
+
+    public AbstractIndexTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches) {
+        this.dataGen = dataGen;
+        this.opSelector = opSelector;
+        this.numBatches = numBatches;
+        this.rnd = new Random();
+        this.indexAccessor = index.createAccessor(TestOperationCallback.INSTANCE, TestOperationCallback.INSTANCE);
+    }
+
+    @Override
+    public void run() {
+        try {
+            for (int i = 0; i < numBatches; i++) {
+                TupleBatch batch = dataGen.getBatch();
+                for (int j = 0; j < batch.size(); j++) {
+                    TestOperation op = opSelector.getOp(rnd.nextInt());
+                    ITupleReference tuple = batch.get(j);
+                    performOp(tuple, op);
+                }
+                dataGen.releaseBatch(batch);
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    protected void consumeCursorTuples(IIndexCursor cursor) throws HyracksDataException, IndexException {
+        try {
+            while (cursor.hasNext()) {
+                cursor.next();
+            }
+        } finally {
+            cursor.close();
+        }
+    }
+}
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/AbstractTreeIndexTestWorker.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/AbstractTreeIndexTestWorker.java
deleted file mode 100644
index eca9b35..0000000
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/AbstractTreeIndexTestWorker.java
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.common;
-
-import java.util.Random;
-
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
-import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
-import edu.uci.ics.hyracks.storage.am.common.datagen.TupleBatch;
-
-public abstract class AbstractTreeIndexTestWorker extends Thread implements ITreeIndexTestWorker {
-    private Random rnd = new Random();
-    private final DataGenThread dataGen;
-    private final TestOperationSelector opSelector;
-    private final int numBatches;
-    
-    protected final IIndexAccessor indexAccessor;
-    
-    public AbstractTreeIndexTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, ITreeIndex index, int numBatches) {
-        this.dataGen = dataGen;
-        this.opSelector = opSelector;
-        this.numBatches = numBatches;
-        indexAccessor = index.createAccessor();
-    }
-    
-    @Override
-    public void run() {
-        try {
-            for (int i = 0; i < numBatches; i++) {
-                TupleBatch batch = dataGen.getBatch();     
-                for (int j = 0; j < batch.size(); j++) {
-                    TestOperation op = opSelector.getOp(rnd.nextInt());
-                    ITupleReference tuple = batch.get(j);
-                    performOp(tuple, op);
-                }
-                dataGen.releaseBatch(batch);
-            }
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
-    }
-    
-    protected void consumeCursorTuples(IIndexCursor cursor) throws HyracksDataException {
-        try {
-            while (cursor.hasNext()) {
-                cursor.next();
-            }
-        } finally {
-            cursor.close();
-        }
-    }
-}
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/CheckTuple.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/CheckTuple.java
index 4b4b90b..b7037d6 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/CheckTuple.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/CheckTuple.java
@@ -17,42 +17,75 @@
 
 @SuppressWarnings({"rawtypes", "unchecked"})
 public class CheckTuple<T extends Comparable<T>> implements Comparable<T> {
-    protected final int numKeys;    
-    protected final Comparable[] tuple;
+    protected final int numKeys;
+    protected final Comparable[] fields;
     protected int pos;
+    protected boolean isHighKey;
 
     public CheckTuple(int numFields, int numKeys) {
         this.numKeys = numKeys;
-        this.tuple = new Comparable[numFields];
+        this.fields = new Comparable[numFields];
         pos = 0;
+        isHighKey = false;
     }
 
-    public void add(T e) {
-        tuple[pos++] = e;
+    public void appendField(T e) {
+        fields[pos++] = e;
     }
 
-    @Override
-    public int compareTo(T o) {
-        CheckTuple<T> other = (CheckTuple<T>)o;
-        for (int i = 0; i < numKeys; i++) {            
-            int cmp = tuple[i].compareTo(other.get(i));
-            if (cmp != 0) {
-                return cmp;
-            }
+	@Override
+	public int compareTo(T o) {
+		CheckTuple<T> other = (CheckTuple<T>) o;
+		int cmpFieldCount = Math.min(other.getNumKeys(), numKeys);
+		for (int i = 0; i < cmpFieldCount; i++) {
+			int cmp = fields[i].compareTo(other.getField(i));
+			if (cmp != 0) {
+				return cmp;
+			}
+		}
+		if (other.getNumKeys() == numKeys) {
+		    return 0;
+		}
+		if (other.getNumKeys() < numKeys) {
+		    return (other.isHighKey) ? -1 : 1;
+		}
+		if (other.getNumKeys() > numKeys) {
+            return (isHighKey) ? 1 : -1;
         }
-        return 0;
-    }
+		return 0;
+	}
 
-    public T get(int idx) {
-        return (T)tuple[idx];
-    }
+	@Override
+	public boolean equals(Object o) {
+		if (!(o instanceof Comparable<?>)) {
+			return false;
+		}
+		return compareTo((T) o) == 0;
+	}
     
-    public void set(int idx, T e) {
-        tuple[idx] = e;
+	@Override
+	public int hashCode() {
+		int hash = 0;
+		for (int i = 0; i < numKeys; i++) {
+			hash = 37 * hash + fields[i].hashCode();
+		}
+		return hash;
+	}
+	
+	public void setIsHighKey(boolean isHighKey) {
+	    this.isHighKey = isHighKey;
+	}
+	
+	public T getField(int idx) {
+		return (T) fields[idx];
+	}
+    
+    public void setField(int idx, T e) {
+        fields[idx] = e;
     }
     
     public int size() {
-        return tuple.length;
+        return fields.length;
     }
     
     public int getNumKeys() {
@@ -62,9 +95,9 @@
     @Override
     public String toString() {
         StringBuilder strBuilder = new StringBuilder();
-        for (int i = 0; i < tuple.length; i++) {
-            strBuilder.append(tuple[i].toString());
-            if (i != tuple.length-1) {
+        for (int i = 0; i < fields.length; i++) {
+            strBuilder.append(fields[i].toString());
+            if (i != fields.length-1) {
                 strBuilder.append(" ");
             }
         }
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/IIndexTestContext.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/IIndexTestContext.java
new file mode 100644
index 0000000..3599c5e
--- /dev/null
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/IIndexTestContext.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common;
+
+import java.util.Collection;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+
+@SuppressWarnings("rawtypes")
+public interface IIndexTestContext<T extends CheckTuple> {
+    public int getFieldCount();
+
+    public int getKeyFieldCount();
+
+    public ISerializerDeserializer[] getFieldSerdes();
+
+    public IBinaryComparatorFactory[] getComparatorFactories();
+
+    public IIndexAccessor getIndexAccessor();
+
+    public IIndex getIndex();
+
+    public ArrayTupleReference getTuple();
+
+    public ArrayTupleBuilder getTupleBuilder();
+
+    public void insertCheckTuple(T checkTuple, Collection<T> checkTuples);      
+
+    public void deleteCheckTuple(T checkTuple, Collection<T> checkTuples);
+
+    public Collection<T> getCheckTuples();
+
+}
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/IIndexTestWorkerFactory.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/IIndexTestWorkerFactory.java
new file mode 100644
index 0000000..d4efb3e
--- /dev/null
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/IIndexTestWorkerFactory.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common;
+
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+
+public interface IIndexTestWorkerFactory {
+    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index,
+            int numBatches);
+}
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/ITreeIndexTestWorkerFactory.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/ITreeIndexTestWorkerFactory.java
deleted file mode 100644
index 64b5aea..0000000
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/ITreeIndexTestWorkerFactory.java
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.common;
-
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
-import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
-
-public interface ITreeIndexTestWorkerFactory {
-    public AbstractTreeIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector, ITreeIndex index, int numBatches);
-}
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/IndexMultiThreadTestDriver.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/IndexMultiThreadTestDriver.java
new file mode 100644
index 0000000..ca1d28f
--- /dev/null
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/IndexMultiThreadTestDriver.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+
+@SuppressWarnings("rawtypes")
+public class IndexMultiThreadTestDriver {
+    protected static final int RANDOM_SEED = 50;
+    // Means no additional payload. Only the specified fields.
+    protected static final int PAYLOAD_SIZE = 0;
+    protected final TestOperationSelector opSelector;
+    protected final ISerializerDeserializer[] fieldSerdes;
+    protected final IIndex index;
+    protected final IIndexTestWorkerFactory workerFactory;
+
+    public IndexMultiThreadTestDriver(IIndex index, IIndexTestWorkerFactory workerFactory,
+            ISerializerDeserializer[] fieldSerdes, TestOperation[] ops, double[] opProbs) {
+        this.index = index;
+        this.workerFactory = workerFactory;
+        this.fieldSerdes = fieldSerdes;
+        this.opSelector = new TestOperationSelector(ops, opProbs);
+    }
+
+    public void init() throws HyracksDataException {
+        index.create();
+        index.activate();
+    }
+
+    public long[] run(int numThreads, int numRepeats, int numOps, int batchSize) throws InterruptedException,
+            TreeIndexException {
+        int numBatches = numOps / batchSize;
+        int threadNumBatches = numBatches / numThreads;
+        if (threadNumBatches <= 0) {
+            throw new TreeIndexException("Inconsistent parameters given. Need at least one batch per thread.");
+        }
+        long[] times = new long[numRepeats];
+        for (int i = 0; i < numRepeats; i++) {
+            DataGenThread dataGen = createDatagenThread(numThreads, numBatches, batchSize);
+            dataGen.start();
+            // Wait until the tupleBatchQueue is filled to capacity.
+            while (dataGen.tupleBatchQueue.remainingCapacity() != 0 && dataGen.tupleBatchQueue.size() != numBatches) {
+                Thread.sleep(10);
+            }
+
+            // Start worker threads.
+            AbstractIndexTestWorker[] workers = new AbstractIndexTestWorker[numThreads];
+            long start = System.currentTimeMillis();
+            for (int j = 0; j < numThreads; j++) {
+                workers[j] = workerFactory.create(dataGen, opSelector, index, threadNumBatches);
+                workers[j].start();
+            }
+            // Join worker threads.
+            for (int j = 0; j < numThreads; j++) {
+                workers[j].join();
+            }
+            long end = System.currentTimeMillis();
+            times[i] = end - start;
+        }
+        return times;
+    }
+
+    public void deinit() throws HyracksDataException {
+        index.deactivate();
+        index.destroy();
+    }
+
+    // To allow subclasses to override the data gen params.
+    public DataGenThread createDatagenThread(int numThreads, int numBatches, int batchSize) {
+        return new DataGenThread(numThreads, numBatches, batchSize, fieldSerdes, PAYLOAD_SIZE, RANDOM_SEED,
+                2 * numThreads, false);
+    }
+}
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/IndexTestContext.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/IndexTestContext.java
new file mode 100644
index 0000000..e0aa1db
--- /dev/null
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/IndexTestContext.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.common;
+
+import java.util.Collection;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+
+@SuppressWarnings("rawtypes")
+public abstract class IndexTestContext<T extends CheckTuple> implements IIndexTestContext<T> {
+    protected final ISerializerDeserializer[] fieldSerdes;
+    protected final IIndex index;
+    protected final ArrayTupleBuilder tupleBuilder;
+    protected final ArrayTupleReference tuple = new ArrayTupleReference();
+    protected final IIndexAccessor indexAccessor;
+
+    public IndexTestContext(ISerializerDeserializer[] fieldSerdes, IIndex index) {
+        this.fieldSerdes = fieldSerdes;
+        this.index = index;
+        this.indexAccessor = (IIndexAccessor) index.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
+        this.tupleBuilder = new ArrayTupleBuilder(fieldSerdes.length);
+    }
+
+    @Override
+    public int getFieldCount() {
+        return fieldSerdes.length;
+    }
+
+    @Override
+    public IIndexAccessor getIndexAccessor() {
+        return indexAccessor;
+    }
+
+    @Override
+    public ArrayTupleReference getTuple() {
+        return tuple;
+    }
+
+    @Override
+    public ArrayTupleBuilder getTupleBuilder() {
+        return tupleBuilder;
+    }
+
+    @Override
+    public ISerializerDeserializer[] getFieldSerdes() {
+        return fieldSerdes;
+    }
+
+    @Override
+    public IIndex getIndex() {
+        return index;
+    }
+
+    @Override
+    public void insertCheckTuple(T checkTuple, Collection<T> checkTuples) {
+        checkTuples.add(checkTuple);
+    }
+
+    @Override
+    public void deleteCheckTuple(T checkTuple, Collection<T> checkTuples) {
+        checkTuples.remove(checkTuple);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TestOperationCallback.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TestOperationCallback.java
new file mode 100644
index 0000000..04f888b
--- /dev/null
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TestOperationCallback.java
@@ -0,0 +1,45 @@
+package edu.uci.ics.hyracks.storage.am.common;
+
+import java.util.Random;
+
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+
+public enum TestOperationCallback implements ISearchOperationCallback, IModificationOperationCallback {
+    INSTANCE;
+
+    private static final int RANDOM_SEED = 50;
+    private final Random random = new Random();
+
+    private TestOperationCallback() {
+        random.setSeed(RANDOM_SEED);
+    }
+
+    @Override
+    public boolean proceed(ITupleReference tuple) {
+        // Always fail
+        return false;
+    }
+
+    @Override
+    public void reconcile(ITupleReference tuple) {
+        // Do nothing.
+    }
+
+    @Override
+    public void before(ITupleReference tuple) {
+        // Do nothing.        
+    }
+
+    @Override
+    public void found(ITupleReference before, ITupleReference after) {
+        // Do nothing.        
+    }
+
+    @Override
+    public void cancel(ITupleReference tuple) {
+        // Do nothing.
+    }
+
+}
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TestOperationSelector.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TestOperationSelector.java
index 1ae79a1..47735e5 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TestOperationSelector.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TestOperationSelector.java
@@ -15,7 +15,8 @@
 
 package edu.uci.ics.hyracks.storage.am.common;
 
-import java.util.Arrays;
+import edu.uci.ics.hyracks.storage.am.common.datagen.ProbabilityHelper;
+
 
 public class TestOperationSelector {
 
@@ -32,15 +33,15 @@
     }
     
     private final TestOperation[] ops;
-    private final int[] opRanges;    
+    private final int[] cumulIntRanges;    
     
-    public TestOperationSelector(TestOperation[] ops, float[] opProbs) {
+    public TestOperationSelector(TestOperation[] ops, double[] opProbs) {
         sanityCheck(ops, opProbs);
         this.ops = ops;
-        this.opRanges = getOpRanges(opProbs);
+        this.cumulIntRanges = ProbabilityHelper.getCumulIntRanges(opProbs);
     }
     
-    private void sanityCheck(TestOperation[] ops, float[] opProbs) {
+    private void sanityCheck(TestOperation[] ops, double[] opProbs) {
         if (ops.length == 0) {
             throw new RuntimeException("Empty op array.");
         }
@@ -59,25 +60,8 @@
         }
     }
     
-    private int[] getOpRanges(float[] opProbabilities) {
-        int[] opRanges = new int[opProbabilities.length];
-        if (opRanges.length > 1) {
-            opRanges[0] = (int) Math.floor(Integer.MAX_VALUE * opProbabilities[0]);
-            for (int i = 1; i < opRanges.length - 1; i++) {
-                opRanges[i] = opRanges[i - 1] + (int) Math.floor(Integer.MAX_VALUE * opProbabilities[i]);
-            }
-            opRanges[opRanges.length - 1] = Integer.MAX_VALUE;
-        } else {
-            opRanges[0] = Integer.MAX_VALUE;
-        }
-        return opRanges;
-    }
-    
     public TestOperation getOp(int randomInt) {
-        int ix = Arrays.binarySearch(opRanges, randomInt);
-        if (ix < 0) {
-            ix = -ix - 1;
-        }
+        int ix = ProbabilityHelper.choose(cumulIntRanges, randomInt);
         return ops[ix];
     }
 }
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TestWorkloadConf.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TestWorkloadConf.java
index 2437514..28845ed 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TestWorkloadConf.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TestWorkloadConf.java
@@ -19,9 +19,9 @@
 
 public class TestWorkloadConf {
     public final TestOperation[] ops;
-    public final float[] opProbs;
+    public final double[] opProbs;
 
-    public TestWorkloadConf(TestOperation[] ops, float[] opProbs) {
+    public TestWorkloadConf(TestOperation[] ops, double[] opProbs) {
         this.ops = ops;
         this.opProbs = opProbs;
     }
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TreeIndexMultiThreadTestDriver.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TreeIndexMultiThreadTestDriver.java
deleted file mode 100644
index 8c1d06f..0000000
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TreeIndexMultiThreadTestDriver.java
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.common;
-
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
-import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
-import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
-
-@SuppressWarnings("rawtypes")
-public class TreeIndexMultiThreadTestDriver {
-    private static final int RANDOM_SEED = 50;
-    // Means no additional payload. Only the specified fields.
-    private static final int PAYLOAD_SIZE = 0;
-    private final TestOperationSelector opSelector;    
-    private final ISerializerDeserializer[] fieldSerdes;
-    private final ITreeIndex index;
-    private final ITreeIndexTestWorkerFactory workerFactory;
-    
-    public TreeIndexMultiThreadTestDriver(ITreeIndex index, ITreeIndexTestWorkerFactory workerFactory,
-            ISerializerDeserializer[] fieldSerdes, TestOperation[] ops, float[] opProbs) {
-        this.index = index;
-        this.workerFactory = workerFactory;
-        this.fieldSerdes = fieldSerdes;
-        this.opSelector = new TestOperationSelector(ops, opProbs);
-    }      
-    
-    public void init(int fileId) throws HyracksDataException {
-    	index.create(fileId);
-    	index.open(fileId);
-    }
-    
-    public long[] run(int numThreads, int numRepeats, int numOps, int batchSize) throws InterruptedException, TreeIndexException {
-        int numBatches = numOps / batchSize;
-        int threadNumBatches = numBatches / numThreads;
-        if (threadNumBatches <= 0) {
-            throw new TreeIndexException("Inconsistent parameters given. Need at least one batch per thread.");
-        }
-        long[] times = new long[numRepeats];
-        for (int i = 0; i < numRepeats; i++) {
-            DataGenThread dataGen = createDatagenThread(numThreads, numBatches, batchSize);
-            dataGen.start();
-            // Wait until the tupleBatchQueue is filled to capacity.
-            while (dataGen.tupleBatchQueue.remainingCapacity() != 0 && dataGen.tupleBatchQueue.size() != numBatches) {
-                Thread.sleep(10);
-            }
-                        
-            // Start worker threads.
-            AbstractTreeIndexTestWorker[] workers = new AbstractTreeIndexTestWorker[numThreads];
-            long start = System.currentTimeMillis();
-            for (int j = 0; j < numThreads; j++) {
-                workers[j] = workerFactory.create(dataGen, opSelector, index, threadNumBatches);
-                workers[j].start();
-            }
-            // Join worker threads.
-            for (int j = 0; j < numThreads; j++) {                
-                workers[j].join();
-            }
-            long end = System.currentTimeMillis();
-            times[i] = end - start;
-        }
-        return times;
-    }
-    
-    public void deinit() throws HyracksDataException {
-    	index.close();
-    }
-    
-    // To allow subclasses to override the data gen params.
-    public DataGenThread createDatagenThread(int numThreads, int numBatches, int batchSize) {
-        return new DataGenThread(numThreads, numBatches, batchSize, fieldSerdes, PAYLOAD_SIZE, RANDOM_SEED, 2*numThreads, false);
-    }
-}
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TreeIndexTestContext.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TreeIndexTestContext.java
deleted file mode 100644
index bc5312c..0000000
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TreeIndexTestContext.java
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.common;
-
-import java.util.Collection;
-
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
-
-@SuppressWarnings("rawtypes")
-public abstract class TreeIndexTestContext<T extends CheckTuple> implements ITreeIndexTestContext<T> {
-    protected final ISerializerDeserializer[] fieldSerdes;
-    protected final ITreeIndex treeIndex;
-    protected final ArrayTupleBuilder tupleBuilder;
-    protected final ArrayTupleReference tuple = new ArrayTupleReference();
-    protected final IIndexAccessor indexAccessor;
-
-    public TreeIndexTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) {
-        this.fieldSerdes = fieldSerdes;
-        this.treeIndex = treeIndex;
-        this.indexAccessor = (IIndexAccessor) treeIndex.createAccessor();
-        this.tupleBuilder = new ArrayTupleBuilder(fieldSerdes.length);
-    }
-
-    @Override
-    public int getFieldCount() {
-        return fieldSerdes.length;
-    }
-
-    @Override
-    public IIndexAccessor getIndexAccessor() {
-        return indexAccessor;
-    }
-
-    @Override
-    public ArrayTupleReference getTuple() {
-        return tuple;
-    }
-
-    @Override
-    public ArrayTupleBuilder getTupleBuilder() {
-        return tupleBuilder;
-    }
-
-    @Override
-    public ISerializerDeserializer[] getFieldSerdes() {
-        return fieldSerdes;
-    }
-
-    @Override
-    public ITreeIndex getIndex() {
-        return treeIndex;
-    }
-
-    @Override
-    public void insertCheckTuple(T checkTuple, Collection<T> checkTuples) {
-        checkTuples.add(checkTuple);
-    }
-
-    @Override
-    public void deleteCheckTuple(T checkTuple, Collection<T> checkTuples) {
-        checkTuples.remove(checkTuple);
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TreeIndexTestUtils.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TreeIndexTestUtils.java
index d16553a..1a80231 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TreeIndexTestUtils.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TreeIndexTestUtils.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package edu.uci.ics.hyracks.storage.am.common;
 
 import static org.junit.Assert.fail;
@@ -18,7 +33,7 @@
 import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoadContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
 import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
@@ -44,11 +59,11 @@
 
     protected abstract Collection createCheckTuplesCollection();
 
-    protected abstract ArrayTupleBuilder createDeleteTupleBuilder(ITreeIndexTestContext ctx);
+    protected abstract ArrayTupleBuilder createDeleteTupleBuilder(IIndexTestContext ctx);
 
     // See if tuple with corresponding checkTuple exists in ctx.checkTuples.
     protected abstract boolean checkDiskOrderScanResult(ITupleReference tuple, CheckTuple checkTuple,
-            ITreeIndexTestContext ctx) throws HyracksDataException;
+            IIndexTestContext ctx) throws HyracksDataException;
 
     @SuppressWarnings("unchecked")
     public static void createTupleFromCheckTuple(CheckTuple checkTuple, ArrayTupleBuilder tupleBuilder,
@@ -57,7 +72,7 @@
         DataOutput dos = tupleBuilder.getDataOutput();
         tupleBuilder.reset();
         for (int i = 0; i < fieldCount; i++) {
-            fieldSerdes[i].serialize(checkTuple.get(i), dos);
+            fieldSerdes[i].serialize(checkTuple.getField(i), dos);
             tupleBuilder.addFieldEndOffset();
         }
         tuple.reset(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray());
@@ -73,13 +88,13 @@
                     tuple.getFieldLength(i));
             DataInput dataIn = new DataInputStream(inStream);
             Comparable fieldObj = (Comparable) fieldSerdes[i].deserialize(dataIn);
-            checkTuple.add(fieldObj);
+            checkTuple.appendField(fieldObj);
         }
         return checkTuple;
     }
 
     @SuppressWarnings("unchecked")
-    public void checkScan(ITreeIndexTestContext ctx) throws Exception {
+    public void checkScan(IIndexTestContext ctx) throws Exception {
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("Testing Scan.");
         }
@@ -90,7 +105,7 @@
         checkExpectedResults(scanCursor, ctx.getCheckTuples(), ctx.getFieldSerdes(), ctx.getKeyFieldCount(), checkIter);
     }
 
-    public void checkDiskOrderScan(ITreeIndexTestContext ctx) throws Exception {
+    public void checkDiskOrderScan(IIndexTestContext ctx) throws Exception {
         try {
             if (LOGGER.isLoggable(Level.INFO)) {
                 LOGGER.info("Testing Disk-Order Scan.");
@@ -128,16 +143,16 @@
                 LOGGER.info("Ignoring disk-order scan since it's not supported.");
             }
         } catch (ClassCastException e) {
-			// Ignore exception because IIndexAccessor sometimes isn't
-			// an ITreeIndexAccessor, e.g., for the LSMBTree.
-			if (LOGGER.isLoggable(Level.INFO)) {
-				LOGGER.info("Ignoring disk-order scan since it's not supported.");
-			}
-		}
+            // Ignore exception because IIndexAccessor sometimes isn't
+            // an ITreeIndexAccessor, e.g., for the LSMBTree.
+            if (LOGGER.isLoggable(Level.INFO)) {
+                LOGGER.info("Ignoring disk-order scan since it's not supported.");
+            }
+        }
     }
 
     @SuppressWarnings("unchecked")
-    public void insertIntTuples(ITreeIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
+    public void insertIntTuples(IIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
         int fieldCount = ctx.getFieldCount();
         int numKeyFields = ctx.getKeyFieldCount();
         int[] fieldValues = new int[ctx.getFieldCount()];
@@ -165,9 +180,9 @@
             }
         }
     }
-    
+
     @SuppressWarnings("unchecked")
-    public void upsertIntTuples(ITreeIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
+    public void upsertIntTuples(IIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
         int fieldCount = ctx.getFieldCount();
         int numKeyFields = ctx.getKeyFieldCount();
         int[] fieldValues = new int[ctx.getFieldCount()];
@@ -197,7 +212,7 @@
     }
 
     @SuppressWarnings("unchecked")
-    public void bulkLoadIntTuples(ITreeIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
+    public void bulkLoadIntTuples(IIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
         int fieldCount = ctx.getFieldCount();
         int numKeyFields = ctx.getKeyFieldCount();
         int[] fieldValues = new int[ctx.getFieldCount()];
@@ -221,14 +236,14 @@
         }
     }
 
-    public static void bulkLoadCheckTuples(ITreeIndexTestContext ctx, Collection<CheckTuple> checkTuples)
+    public static void bulkLoadCheckTuples(IIndexTestContext ctx, Collection<CheckTuple> checkTuples)
             throws HyracksDataException, IndexException {
         int fieldCount = ctx.getFieldCount();
         int numTuples = checkTuples.size();
         ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
         // Perform bulk load.
-        IIndexBulkLoadContext bulkLoadCtx = ctx.getIndex().beginBulkLoad(0.7f);
+        IIndexBulkLoader bulkLoader = ctx.getIndex().createBulkLoader(0.7f, false, numTuples);
         int c = 1;
         for (CheckTuple checkTuple : checkTuples) {
             if (LOGGER.isLoggable(Level.INFO)) {
@@ -237,14 +252,14 @@
                 }
             }
             createTupleFromCheckTuple(checkTuple, tupleBuilder, tuple, ctx.getFieldSerdes());
-            ctx.getIndex().bulkLoadAddTuple(tuple, bulkLoadCtx);
+            bulkLoader.add(tuple);
             c++;
         }
-        ctx.getIndex().endBulkLoad(bulkLoadCtx);
+        bulkLoader.end();
     }
 
     @SuppressWarnings("unchecked")
-    public void deleteTuples(ITreeIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
+    public void deleteTuples(IIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
         ArrayTupleBuilder deleteTupleBuilder = createDeleteTupleBuilder(ctx);
         ArrayTupleReference deleteTuple = new ArrayTupleReference();
         int numCheckTuples = ctx.getCheckTuples().size();
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/config/AccessMethodTestsConfig.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/config/AccessMethodTestsConfig.java
new file mode 100644
index 0000000..f962200
--- /dev/null
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/config/AccessMethodTestsConfig.java
@@ -0,0 +1,182 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.config;
+
+/**
+ * Global parameters used for executing access method JUnit tests.
+ */
+public class AccessMethodTestsConfig {
+    // Test params for RTree, LSMRTree and LSMRTreeWithAntiMatterTuples.
+    public static final int RTREE_NUM_TUPLES_TO_INSERT = 100;
+    public static final int RTREE_NUM_INSERT_ROUNDS = 2;
+    public static final int RTREE_NUM_DELETE_ROUNDS = 2;
+    public static final int RTREE_MULTITHREAD_NUM_OPERATIONS = 200;
+    public static final boolean RTREE_TEST_RSTAR_POLICY = true;
+    // Test params for LSMRTree and LSMRTreeWithAntiMatterTuples.
+    public static final int LSM_RTREE_BULKLOAD_ROUNDS = 5;
+    public static final int LSM_RTREE_MAX_TREES_TO_MERGE = 3;
+    public static final boolean LSM_RTREE_TEST_RSTAR_POLICY = false;
+
+    // Test params for BTree, LSMBTree.
+    public static final int BTREE_NUM_TUPLES_TO_INSERT = 100;
+    public static final int BTREE_NUM_INSERT_ROUNDS = 3;
+    public static final int BTREE_NUM_DELETE_ROUNDS = 3;
+    public static final int BTREE_NUM_UPDATE_ROUNDS = 3;
+    public static final int BTREE_MULTITHREAD_NUM_OPERATIONS = 200;
+    // Test params for LSMBTree only.
+    public static final int LSM_BTREE_BULKLOAD_ROUNDS = 5;
+    public static final int LSM_BTREE_MAX_TREES_TO_MERGE = 10;
+
+    // Mem configuration for RTree.
+    public static final int RTREE_PAGE_SIZE = 512;
+    public static final int RTREE_NUM_PAGES = 1000;
+    public static final int RTREE_MAX_OPEN_FILES = 10;
+    public static final int RTREE_HYRACKS_FRAME_SIZE = 128;
+
+    // Mem configuration for LSMRTree and LSMRTreeWithAntiMatterTuples.
+    public static final int LSM_RTREE_DISK_PAGE_SIZE = 512;
+    public static final int LSM_RTREE_DISK_NUM_PAGES = 1000;
+    public static final int LSM_RTREE_DISK_MAX_OPEN_FILES = 2000;
+    public static final int LSM_RTREE_MEM_PAGE_SIZE = 512;
+    public static final int LSM_RTREE_MEM_NUM_PAGES = 1000;
+    public static final int LSM_RTREE_HYRACKS_FRAME_SIZE = 128;
+
+    // Mem configuration for BTree.
+    public static final int BTREE_PAGE_SIZE = 256;
+    public static final int BTREE_NUM_PAGES = 100;
+    public static final int BTREE_MAX_OPEN_FILES = 10;
+    public static final int BTREE_HYRACKS_FRAME_SIZE = 128;
+
+    // Mem configuration for LSMBTree.
+    public static final int LSM_BTREE_DISK_PAGE_SIZE = 256;
+    public static final int LSM_BTREE_DISK_NUM_PAGES = 1000;
+    public static final int LSM_BTREE_DISK_MAX_OPEN_FILES = 200;
+    public static final int LSM_BTREE_MEM_PAGE_SIZE = 256;
+    public static final int LSM_BTREE_MEM_NUM_PAGES = 100;
+    public static final int LSM_BTREE_HYRACKS_FRAME_SIZE = 128;
+
+    // Mem configuration for Inverted Index.
+    public static final int LSM_INVINDEX_DISK_PAGE_SIZE = 1024;
+    public static final int LSM_INVINDEX_DISK_NUM_PAGES = 1000;
+    public static final int LSM_INVINDEX_DISK_MAX_OPEN_FILES = 1000;
+    public static final int LSM_INVINDEX_MEM_PAGE_SIZE = 1024;
+    public static final int LSM_INVINDEX_MEM_NUM_PAGES = 100;
+    public static final int LSM_INVINDEX_HYRACKS_FRAME_SIZE = 32768;
+    // Test parameters.
+    public static final int LSM_INVINDEX_NUM_DOCS_TO_INSERT = 100;
+    // Used for full-fledged search test.
+    public static final int LSM_INVINDEX_NUM_DOC_QUERIES = 1000;
+    public static final int LSM_INVINDEX_NUM_RANDOM_QUERIES = 1000;
+    // Used for non-search tests to sanity check index searches.
+    public static final int LSM_INVINDEX_TINY_NUM_DOC_QUERIES = 200;
+    public static final int LSM_INVINDEX_TINY_NUM_RANDOM_QUERIES = 200;
+    public static final int LSM_INVINDEX_NUM_BULKLOAD_ROUNDS = 5;
+    public static final int LSM_INVINDEX_MAX_TREES_TO_MERGE = 5;
+    public static final int LSM_INVINDEX_NUM_INSERT_ROUNDS = 3;
+    public static final int LSM_INVINDEX_NUM_DELETE_ROUNDS = 3;
+    // Allocate a generous size to make sure we have enough elements for all tests.
+    public static final int LSM_INVINDEX_SCAN_COUNT_ARRAY_SIZE = 1000000;
+    public static final int LSM_INVINDEX_MULTITHREAD_NUM_OPERATIONS = 200;
+
+    // Test params for BloomFilter
+    public static final int BLOOM_FILTER_NUM_TUPLES_TO_INSERT = 100;
+
+    // Mem configuration for BloomFilter.
+    public static final int BLOOM_FILTER_PAGE_SIZE = 256;
+    public static final int BLOOM_FILTER_NUM_PAGES = 1000;
+    public static final int BLOOM_FILTER_MAX_OPEN_FILES = 10;
+    public static final int BLOOM_FILTER_HYRACKS_FRAME_SIZE = 128;
+
+}
+
+/* ORIGINAL TEST PARAMETERS: DO NOT EDIT!
+// Test params for RTree, LSMRTree and LSMRTreeWithAntiMatterTuples.
+public static final int RTREE_NUM_TUPLES_TO_INSERT = 10000;
+public static final int RTREE_NUM_INSERT_ROUNDS = 2;
+public static final int RTREE_NUM_DELETE_ROUNDS = 2;
+public static final int RTREE_MULTITHREAD_NUM_OPERATIONS = 10000;
+// Test params for LSMRTree and LSMRTreeWithAntiMatterTuples.
+public static final int LSM_RTREE_BULKLOAD_ROUNDS = 5;
+public static final int LSM_RTREE_MAX_TREES_TO_MERGE = 3;	
+
+// Test params for BTree, LSMBTree.
+public static final int BTREE_NUM_TUPLES_TO_INSERT = 10000;
+public static final int BTREE_NUM_INSERT_ROUNDS = 3;
+public static final int BTREE_NUM_DELETE_ROUNDS = 3;
+public static final int BTREE_NUM_UPDATE_ROUNDS = 3;
+public static final int BTREE_MULTITHREAD_NUM_OPERATIONS = 10000;
+// Test params for LSMBTree only.
+public static final int LSM_BTREE_BULKLOAD_ROUNDS = 5;
+public static final int LSM_BTREE_MAX_TREES_TO_MERGE = 10;
+	
+	
+// Mem configuration for RTree.
+public static final int RTREE_PAGE_SIZE = 512;
+public static final int RTREE_NUM_PAGES = 1000;
+public static final int RTREE_MAX_OPEN_FILES = 10;
+public static final int RTREE_HYRACKS_FRAME_SIZE = 128;
+	
+// Mem configuration for LSMRTree and LSMRTreeWithAntiMatterTuples.
+public static final int LSM_RTREE_DISK_PAGE_SIZE = 256;
+public static final int LSM_RTREE_DISK_NUM_PAGES = 1000;
+public static final int LSM_RTREE_DISK_MAX_OPEN_FILES = 2000;
+public static final int LSM_RTREE_MEM_PAGE_SIZE = 256;
+public static final int LSM_RTREE_MEM_NUM_PAGES = 1000;
+public static final int LSM_RTREE_HYRACKS_FRAME_SIZE = 128;
+	
+// Mem configuration for BTree.
+public static final int BTREE_PAGE_SIZE = 256;
+public static final int BTREE_NUM_PAGES = 100;
+public static final int BTREE_MAX_OPEN_FILES = 10;
+public static final int BTREE_HYRACKS_FRAME_SIZE = 128;
+	
+// Mem configuration for LSMBTree.
+public static final int LSM_BTREE_DISK_PAGE_SIZE = 256;
+public static final int LSM_BTREE_DISK_NUM_PAGES = 1000;
+public static final int LSM_BTREE_DISK_MAX_OPEN_FILES = 200;
+public static final int LSM_BTREE_MEM_PAGE_SIZE = 256;
+public static final int LSM_BTREE_MEM_NUM_PAGES = 100;
+public static final int LSM_BTREE_HYRACKS_FRAME_SIZE = 128;
+
+// Mem configuration for Inverted Index.
+public static final int INVINDEX_PAGE_SIZE = 32768;
+public static final int INVINDEX_NUM_PAGES = 100;
+public static final int INVINDEX_MAX_OPEN_FILES = 10;
+public static final int INVINDEX_HYRACKS_FRAME_SIZE = 32768;
+
+// Mem configuration for Inverted Index.
+public static final int LSM_INVINDEX_DISK_PAGE_SIZE = 1024;
+public static final int LSM_INVINDEX_DISK_NUM_PAGES = 1000;
+public static final int LSM_INVINDEX_DISK_MAX_OPEN_FILES = 1000;
+public static final int LSM_INVINDEX_MEM_PAGE_SIZE = 1024;
+public static final int LSM_INVINDEX_MEM_NUM_PAGES = 100;
+public static final int LSM_INVINDEX_HYRACKS_FRAME_SIZE = 32768;
+// Test parameters.
+public static final int LSM_INVINDEX_NUM_DOCS_TO_INSERT = 10000;
+// Used for full-fledged search test.
+public static final int LSM_INVINDEX_NUM_DOC_QUERIES = 1000;
+public static final int LSM_INVINDEX_NUM_RANDOM_QUERIES = 1000;
+// Used for non-search tests to sanity check index searches.
+public static final int LSM_INVINDEX_TINY_NUM_DOC_QUERIES = 200;
+public static final int LSM_INVINDEX_TINY_NUM_RANDOM_QUERIES = 200;
+public static final int LSM_INVINDEX_NUM_BULKLOAD_ROUNDS = 5;
+public static final int LSM_INVINDEX_MAX_TREES_TO_MERGE = 5;
+public static final int LSM_INVINDEX_NUM_INSERT_ROUNDS = 3;
+public static final int LSM_INVINDEX_NUM_DELETE_ROUNDS = 3;
+// Allocate a generous size to make sure we have enough elements for all tests.
+public static final int LSM_INVINDEX_SCAN_COUNT_ARRAY_SIZE = 1000000;
+public static final int LSM_INVINDEX_MULTITHREAD_NUM_OPERATIONS = 10000;
+*/
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeBulkLoadTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeBulkLoadTest.java
index 198ac58..54ad1fe 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeBulkLoadTest.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeBulkLoadTest.java
@@ -20,6 +20,7 @@
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 
 @SuppressWarnings("rawtypes")
 public abstract class AbstractRTreeBulkLoadTest extends AbstractRTreeTestDriver {
@@ -27,15 +28,19 @@
     private final RTreeTestUtils rTreeTestUtils;
     private final int bulkLoadRounds;
 
-    public AbstractRTreeBulkLoadTest(int bulkLoadRounds) {
+    public AbstractRTreeBulkLoadTest(int bulkLoadRounds, boolean testRstarPolicy) {
+        super(testRstarPolicy);
         this.bulkLoadRounds = bulkLoadRounds;
         this.rTreeTestUtils = new RTreeTestUtils();
     }
 
     @Override
     protected void runTest(ISerializerDeserializer[] fieldSerdes,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, ITupleReference key) throws Exception {
-        AbstractRTreeTestContext ctx = createTestContext(fieldSerdes, valueProviderFactories, numKeys);
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, ITupleReference key,
+            RTreePolicyType rtreePolicyType) throws Exception {
+        AbstractRTreeTestContext ctx = createTestContext(fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType);
+        ctx.getIndex().create();
+        ctx.getIndex().activate();
         for (int i = 0; i < bulkLoadRounds; i++) {
             // We assume all fieldSerdes are of the same type. Check the first
             // one to determine which field types to generate.
@@ -49,7 +54,8 @@
             rTreeTestUtils.checkDiskOrderScan(ctx);
             rTreeTestUtils.checkRangeSearch(ctx, key);
         }
-        ctx.getIndex().close();
+        ctx.getIndex().deactivate();
+        ctx.getIndex().destroy();
     }
 
     @Override
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeDeleteTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeDeleteTest.java
index e70f433..18d042b 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeDeleteTest.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeDeleteTest.java
@@ -20,23 +20,29 @@
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 
 @SuppressWarnings("rawtypes")
 public abstract class AbstractRTreeDeleteTest extends AbstractRTreeTestDriver {
 
     private final RTreeTestUtils rTreeTestUtils;
 
-    private static final int numInsertRounds = 2;
-    private static final int numDeleteRounds = 2;
+    private static final int numInsertRounds = AccessMethodTestsConfig.RTREE_NUM_INSERT_ROUNDS;
+    private static final int numDeleteRounds = AccessMethodTestsConfig.RTREE_NUM_DELETE_ROUNDS;
 
-    public AbstractRTreeDeleteTest() {
+    public AbstractRTreeDeleteTest(boolean testRstarPolicy) {
+    	super(testRstarPolicy);
         this.rTreeTestUtils = new RTreeTestUtils();
     }
 
     @Override
     protected void runTest(ISerializerDeserializer[] fieldSerdes,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, ITupleReference key) throws Exception {
-        AbstractRTreeTestContext ctx = createTestContext(fieldSerdes, valueProviderFactories, numKeys);
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, ITupleReference key,
+            RTreePolicyType rtreePolicyType) throws Exception {
+        AbstractRTreeTestContext ctx = createTestContext(fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType);
+        ctx.getIndex().create();
+        ctx.getIndex().activate();
         for (int i = 0; i < numInsertRounds; i++) {
             // We assume all fieldSerdes are of the same type. Check the first
             // one to determine which field types to generate.
@@ -54,7 +60,8 @@
                 rTreeTestUtils.checkRangeSearch(ctx, key);
             }
         }
-        ctx.getIndex().close();
+        ctx.getIndex().deactivate();
+        ctx.getIndex().destroy();
     }
 
     @Override
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeExamplesTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeExamplesTest.java
index 7192c53..f93e9b6 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeExamplesTest.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeExamplesTest.java
@@ -27,21 +27,26 @@
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
 import edu.uci.ics.hyracks.data.std.primitive.DoublePointable;
 import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
 import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
 import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoadContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
-import edu.uci.ics.hyracks.storage.am.common.impls.TreeDiskOrderScanCursor;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.impls.TreeIndexDiskOrderScanCursor;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 import edu.uci.ics.hyracks.storage.am.rtree.impls.SearchPredicate;
 import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
 
@@ -52,16 +57,14 @@
 
     protected abstract ITreeIndex createTreeIndex(ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
-            IPrimitiveValueProviderFactory[] valueProviderFactories) throws TreeIndexException;
-
-    protected abstract int getIndexFileId();
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType)
+            throws TreeIndexException;
 
     /**
-     * Two Dimensions Example.
-     * 
-     * Create an RTree index of two dimensions, where they keys are of type
-     * integer, and the payload is two integer values. Fill index with random
-     * values using insertions (not bulk load). Perform scans and range search.
+     * Two Dimensions Example. Create an RTree index of two dimensions, where
+     * they keys are of type integer, and the payload is two integer values.
+     * Fill index with random values using insertions (not bulk load). Perform
+     * scans and range search.
      */
     @Test
     public void twoDimensionsExample() throws Exception {
@@ -106,10 +109,10 @@
         IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils.createPrimitiveValueProviderFactories(
                 rtreeCmpFactories.length, IntegerPointable.FACTORY);
 
-        int indexFileId = getIndexFileId();
-        ITreeIndex treeIndex = createTreeIndex(typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories);
-        treeIndex.create(indexFileId);
-        treeIndex.open(indexFileId);
+        ITreeIndex treeIndex = createTreeIndex(typeTraits, rtreeCmpFactories, btreeCmpFactories,
+                valueProviderFactories, RTreePolicyType.RTREE);
+        treeIndex.create();
+        treeIndex.activate();
 
         long start = System.currentTimeMillis();
         if (LOGGER.isLoggable(Level.INFO)) {
@@ -117,7 +120,8 @@
         }
         ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
-        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor();
+        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor(NoOpOperationCallback.INSTANCE,
+                NoOpOperationCallback.INSTANCE);
         int numInserts = 10000;
         for (int i = 0; i < numInserts; i++) {
             int p1x = rnd.nextInt();
@@ -156,15 +160,245 @@
 
         rangeSearch(rtreeCmpFactories, indexAccessor, fieldSerdes, key);
 
-        treeIndex.close();
+        treeIndex.deactivate();
+        treeIndex.destroy();
     }
 
     /**
-     * Two Dimensions Example.
-     * 
-     * Create an RTree index of three dimensions, where they keys are of type
-     * double, and the payload is one double value. Fill index with random
-     * values using insertions (not bulk load). Perform scans and range search.
+     * This test the rtree page split. Originally this test didn't pass since
+     * the rtree assumes always that there will be enough space for the new
+     * tuple after split. Now it passes since if there is not space in the
+     * designated page, then we will just insert it in the other split page.
+     */
+    @Test
+    public void rTreePageSplitTestExample() throws Exception {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("RTree page split test.");
+        }
+
+        // Declare fields.
+        int fieldCount = 5;
+        ITypeTraits[] typeTraits = new ITypeTraits[fieldCount];
+        typeTraits[0] = IntegerPointable.TYPE_TRAITS;
+        typeTraits[1] = IntegerPointable.TYPE_TRAITS;
+        typeTraits[2] = IntegerPointable.TYPE_TRAITS;
+        typeTraits[3] = IntegerPointable.TYPE_TRAITS;
+        typeTraits[4] = UTF8StringPointable.TYPE_TRAITS;
+        // Declare field serdes.
+        ISerializerDeserializer[] fieldSerdes = { IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE };
+
+        // Declare RTree keys.
+        int rtreeKeyFieldCount = 4;
+        IBinaryComparatorFactory[] rtreeCmpFactories = new IBinaryComparatorFactory[rtreeKeyFieldCount];
+        rtreeCmpFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+        rtreeCmpFactories[1] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+        rtreeCmpFactories[2] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+        rtreeCmpFactories[3] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+
+        // Declare BTree keys, this will only be used for LSMRTree
+        int btreeKeyFieldCount = 5;
+        IBinaryComparatorFactory[] btreeCmpFactories = new IBinaryComparatorFactory[btreeKeyFieldCount];
+        btreeCmpFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+        btreeCmpFactories[1] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+        btreeCmpFactories[2] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+        btreeCmpFactories[3] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+        btreeCmpFactories[4] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
+
+        // create value providers
+        IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils.createPrimitiveValueProviderFactories(
+                rtreeCmpFactories.length, IntegerPointable.FACTORY);
+
+        ITreeIndex treeIndex = createTreeIndex(typeTraits, rtreeCmpFactories, btreeCmpFactories,
+                valueProviderFactories, RTreePolicyType.RTREE);
+
+        treeIndex.create();
+        treeIndex.activate();
+
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
+        ArrayTupleReference tuple = new ArrayTupleReference();
+        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
+
+        int p1x = rnd.nextInt();
+        int p1y = rnd.nextInt();
+        int p2x = rnd.nextInt();
+        int p2y = rnd.nextInt();
+        String data = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, Math.min(p1x, p2x), Math.min(p1y, p2y), Math.max(p1x, p2x),
+                Math.max(p1y, p2y), data);
+        indexAccessor.insert(tuple);
+
+        p1x = rnd.nextInt();
+        p1y = rnd.nextInt();
+        p2x = rnd.nextInt();
+        p2y = rnd.nextInt();
+        data = "XXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, Math.min(p1x, p2x), Math.min(p1y, p2y), Math.max(p1x, p2x),
+                Math.max(p1y, p2y), data);
+        indexAccessor.insert(tuple);
+
+        p1x = rnd.nextInt();
+        p1y = rnd.nextInt();
+        p2x = rnd.nextInt();
+        p2y = rnd.nextInt();
+        data = "XXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, Math.min(p1x, p2x), Math.min(p1y, p2y), Math.max(p1x, p2x),
+                Math.max(p1y, p2y), data);
+        indexAccessor.insert(tuple);
+
+        p1x = rnd.nextInt();
+        p1y = rnd.nextInt();
+        p2x = rnd.nextInt();
+        p2y = rnd.nextInt();
+        data = "XXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, Math.min(p1x, p2x), Math.min(p1y, p2y), Math.max(p1x, p2x),
+                Math.max(p1y, p2y), data);
+        indexAccessor.insert(tuple);
+
+        p1x = rnd.nextInt();
+        p1y = rnd.nextInt();
+        p2x = rnd.nextInt();
+        p2y = rnd.nextInt();
+        data = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, Math.min(p1x, p2x), Math.min(p1y, p2y), Math.max(p1x, p2x),
+                Math.max(p1y, p2y), data);
+        indexAccessor.insert(tuple);
+
+        p1x = rnd.nextInt();
+        p1y = rnd.nextInt();
+        p2x = rnd.nextInt();
+        p2y = rnd.nextInt();
+        data = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, Math.min(p1x, p2x), Math.min(p1y, p2y), Math.max(p1x, p2x),
+                Math.max(p1y, p2y), data);
+        indexAccessor.insert(tuple);
+
+        treeIndex.deactivate();
+        treeIndex.destroy();
+    }
+
+    /**
+     * This test the r*tree page split. Originally this test didn't pass since
+     * the r*tree assumes always that there will be enough space for the new
+     * tuple after split. Now it passes since if there is not space in the
+     * designated page, then we will just insert it in the other split page.
+     */
+    @Test
+    public void rStarTreePageSplitTestExample() throws Exception {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("R*Tree page split test.");
+        }
+
+        // Declare fields.
+        int fieldCount = 5;
+        ITypeTraits[] typeTraits = new ITypeTraits[fieldCount];
+        typeTraits[0] = IntegerPointable.TYPE_TRAITS;
+        typeTraits[1] = IntegerPointable.TYPE_TRAITS;
+        typeTraits[2] = IntegerPointable.TYPE_TRAITS;
+        typeTraits[3] = IntegerPointable.TYPE_TRAITS;
+        typeTraits[4] = UTF8StringPointable.TYPE_TRAITS;
+        // Declare field serdes.
+        ISerializerDeserializer[] fieldSerdes = { IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE };
+
+        // Declare RTree keys.
+        int rtreeKeyFieldCount = 4;
+        IBinaryComparatorFactory[] rtreeCmpFactories = new IBinaryComparatorFactory[rtreeKeyFieldCount];
+        rtreeCmpFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+        rtreeCmpFactories[1] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+        rtreeCmpFactories[2] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+        rtreeCmpFactories[3] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+
+        // Declare BTree keys, this will only be used for LSMRTree
+        int btreeKeyFieldCount = 5;
+        IBinaryComparatorFactory[] btreeCmpFactories = new IBinaryComparatorFactory[btreeKeyFieldCount];
+        btreeCmpFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+        btreeCmpFactories[1] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+        btreeCmpFactories[2] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+        btreeCmpFactories[3] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
+        btreeCmpFactories[4] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
+
+        // create value providers
+        IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils.createPrimitiveValueProviderFactories(
+                rtreeCmpFactories.length, IntegerPointable.FACTORY);
+
+        ITreeIndex treeIndex = createTreeIndex(typeTraits, rtreeCmpFactories, btreeCmpFactories,
+                valueProviderFactories, RTreePolicyType.RSTARTREE);
+
+        treeIndex.create();
+        treeIndex.activate();
+
+        ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
+        ArrayTupleReference tuple = new ArrayTupleReference();
+        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
+
+        int p1x = rnd.nextInt();
+        int p1y = rnd.nextInt();
+        int p2x = rnd.nextInt();
+        int p2y = rnd.nextInt();
+        String data = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, Math.min(p1x, p2x), Math.min(p1y, p2y), Math.max(p1x, p2x),
+                Math.max(p1y, p2y), data);
+        indexAccessor.insert(tuple);
+
+        p1x = rnd.nextInt();
+        p1y = rnd.nextInt();
+        p2x = rnd.nextInt();
+        p2y = rnd.nextInt();
+        data = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, Math.min(p1x, p2x), Math.min(p1y, p2y), Math.max(p1x, p2x),
+                Math.max(p1y, p2y), data);
+        indexAccessor.insert(tuple);
+
+        p1x = rnd.nextInt();
+        p1y = rnd.nextInt();
+        p2x = rnd.nextInt();
+        p2y = rnd.nextInt();
+        data = "XXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, Math.min(p1x, p2x), Math.min(p1y, p2y), Math.max(p1x, p2x),
+                Math.max(p1y, p2y), data);
+        indexAccessor.insert(tuple);
+
+        p1x = rnd.nextInt();
+        p1y = rnd.nextInt();
+        p2x = rnd.nextInt();
+        p2y = rnd.nextInt();
+        data = "XXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, Math.min(p1x, p2x), Math.min(p1y, p2y), Math.max(p1x, p2x),
+                Math.max(p1y, p2y), data);
+        indexAccessor.insert(tuple);
+
+        p1x = rnd.nextInt();
+        p1y = rnd.nextInt();
+        p2x = rnd.nextInt();
+        p2y = rnd.nextInt();
+        data = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, Math.min(p1x, p2x), Math.min(p1y, p2y), Math.max(p1x, p2x),
+                Math.max(p1y, p2y), data);
+        indexAccessor.insert(tuple);
+
+        p1x = rnd.nextInt();
+        p1y = rnd.nextInt();
+        p2x = rnd.nextInt();
+        p2y = rnd.nextInt();
+        data = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
+        TupleUtils.createTuple(tb, tuple, fieldSerdes, Math.min(p1x, p2x), Math.min(p1y, p2y), Math.max(p1x, p2x),
+                Math.max(p1y, p2y), data);
+        indexAccessor.insert(tuple);
+
+        treeIndex.deactivate();
+        treeIndex.destroy();
+    }
+
+    /**
+     * Two Dimensions Example. Create an RTree index of three dimensions, where
+     * they keys are of type double, and the payload is one double value. Fill
+     * index with random values using insertions (not bulk load). Perform scans
+     * and range search.
      */
     @Test
     public void threeDimensionsExample() throws Exception {
@@ -213,10 +447,10 @@
         IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils.createPrimitiveValueProviderFactories(
                 rtreeCmpFactories.length, DoublePointable.FACTORY);
 
-        int indexFileId = getIndexFileId();
-        ITreeIndex treeIndex = createTreeIndex(typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories);
-        treeIndex.create(indexFileId);
-        treeIndex.open(indexFileId);
+        ITreeIndex treeIndex = createTreeIndex(typeTraits, rtreeCmpFactories, btreeCmpFactories,
+                valueProviderFactories, RTreePolicyType.RTREE);
+        treeIndex.create();
+        treeIndex.activate();
 
         long start = System.currentTimeMillis();
         if (LOGGER.isLoggable(Level.INFO)) {
@@ -224,7 +458,8 @@
         }
         ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
-        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor();
+        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor(NoOpOperationCallback.INSTANCE,
+                NoOpOperationCallback.INSTANCE);
         int numInserts = 10000;
         for (int i = 0; i < numInserts; i++) {
             double p1x = rnd.nextDouble();
@@ -265,16 +500,15 @@
 
         rangeSearch(rtreeCmpFactories, indexAccessor, fieldSerdes, key);
 
-        treeIndex.close();
+        treeIndex.deactivate();
+        treeIndex.destroy();
     }
 
     /**
-     * Deletion Example.
-     * 
-     * Create an RTree index of two dimensions, where they keys are of type
-     * integer, and the payload is one integer value. Fill index with random
-     * values using insertions, then delete entries one-by-one. Repeat procedure
-     * a few times on same RTree.
+     * Deletion Example. Create an RTree index of two dimensions, where they
+     * keys are of type integer, and the payload is one integer value. Fill
+     * index with random values using insertions, then delete entries
+     * one-by-one. Repeat procedure a few times on same RTree.
      */
     @Test
     public void deleteExample() throws Exception {
@@ -312,14 +546,15 @@
         IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils.createPrimitiveValueProviderFactories(
                 rtreeCmpFactories.length, IntegerPointable.FACTORY);
 
-        int indexFileId = getIndexFileId();
-        ITreeIndex treeIndex = createTreeIndex(typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories);
-        treeIndex.create(indexFileId);
-        treeIndex.open(indexFileId);
+        ITreeIndex treeIndex = createTreeIndex(typeTraits, rtreeCmpFactories, btreeCmpFactories,
+                valueProviderFactories, RTreePolicyType.RTREE);
+        treeIndex.create();
+        treeIndex.activate();
 
         ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
-        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor();
+        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor(NoOpOperationCallback.INSTANCE,
+                NoOpOperationCallback.INSTANCE);
 
         int runs = 3;
         for (int run = 0; run < runs; run++) {
@@ -395,14 +630,12 @@
                 break;
             }
         }
-        treeIndex.close();
+        treeIndex.deactivate();
+        treeIndex.destroy();
     }
 
     /**
-     * Bulk load example.
-     * 
-     * Load a tree with 10,000 tuples.
-     * 
+     * Bulk load example. Load a tree with 10,000 tuples.
      */
     @Test
     public void bulkLoadExample() throws Exception {
@@ -444,10 +677,10 @@
         IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils.createPrimitiveValueProviderFactories(
                 rtreeCmpFactories.length, IntegerPointable.FACTORY);
 
-        int indexFileId = getIndexFileId();
-        ITreeIndex treeIndex = createTreeIndex(typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories);
-        treeIndex.create(indexFileId);
-        treeIndex.open(indexFileId);
+        ITreeIndex treeIndex = createTreeIndex(typeTraits, rtreeCmpFactories, btreeCmpFactories,
+                valueProviderFactories, RTreePolicyType.RTREE);
+        treeIndex.create();
+        treeIndex.activate();
 
         // Load records.
         int numInserts = 10000;
@@ -455,7 +688,7 @@
             LOGGER.info("Bulk loading " + numInserts + " tuples");
         }
         long start = System.currentTimeMillis();
-        IIndexBulkLoadContext bulkLoadCtx = treeIndex.beginBulkLoad(0.7f);
+        IIndexBulkLoader bulkLoader = treeIndex.createBulkLoader(0.7f, false, numInserts);
         ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
 
@@ -469,16 +702,17 @@
 
             TupleUtils.createIntegerTuple(tb, tuple, Math.min(p1x, p2x), Math.min(p1y, p2y), Math.max(p1x, p2x),
                     Math.max(p1y, p2y), pk);
-            treeIndex.bulkLoadAddTuple(tuple, bulkLoadCtx);
+            bulkLoader.add(tuple);
         }
 
-        treeIndex.endBulkLoad(bulkLoadCtx);
+        bulkLoader.end();
         long end = System.currentTimeMillis();
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info(numInserts + " tuples loaded in " + (end - start) + "ms");
         }
 
-        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor();
+        IIndexAccessor indexAccessor = (IIndexAccessor) treeIndex.createAccessor(NoOpOperationCallback.INSTANCE,
+                NoOpOperationCallback.INSTANCE);
 
         // Build key.
         ArrayTupleBuilder keyTb = new ArrayTupleBuilder(rtreeKeyFieldCount);
@@ -487,7 +721,8 @@
 
         rangeSearch(rtreeCmpFactories, indexAccessor, fieldSerdes, key);
 
-        treeIndex.close();
+        treeIndex.deactivate();
+        treeIndex.destroy();
     }
 
     private void scan(IIndexAccessor indexAccessor, ISerializerDeserializer[] fieldSerdes) throws Exception {
@@ -511,14 +746,13 @@
         }
     }
 
-    private void diskOrderScan(IIndexAccessor indexAccessor, ISerializerDeserializer[] fieldSerdes)
-            throws Exception {
+    private void diskOrderScan(IIndexAccessor indexAccessor, ISerializerDeserializer[] fieldSerdes) throws Exception {
         try {
             if (LOGGER.isLoggable(Level.INFO)) {
                 LOGGER.info("Disk-Order Scan:");
             }
             ITreeIndexAccessor treeIndexAccessor = (ITreeIndexAccessor) indexAccessor;
-            TreeDiskOrderScanCursor diskOrderCursor = (TreeDiskOrderScanCursor) treeIndexAccessor
+            TreeIndexDiskOrderScanCursor diskOrderCursor = (TreeIndexDiskOrderScanCursor) treeIndexAccessor
                     .createDiskOrderScanCursor();
             treeIndexAccessor.diskOrderScan(diskOrderCursor);
             try {
@@ -540,12 +774,12 @@
                 LOGGER.info("Ignoring disk-order scan since it's not supported.");
             }
         } catch (ClassCastException e) {
-			// Ignore exception because IIndexAccessor sometimes isn't
-			// an ITreeIndexAccessor, e.g., for the LSMRTree.
-			if (LOGGER.isLoggable(Level.INFO)) {
-				LOGGER.info("Ignoring disk-order scan since it's not supported.");
-			}
-		}
+            // Ignore exception because IIndexAccessor sometimes isn't
+            // an ITreeIndexAccessor, e.g., for the LSMRTree.
+            if (LOGGER.isLoggable(Level.INFO)) {
+                LOGGER.info("Ignoring disk-order scan since it's not supported.");
+            }
+        }
     }
 
     private void rangeSearch(IBinaryComparatorFactory[] cmpFactories, IIndexAccessor indexAccessor,
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeInsertTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeInsertTest.java
index cdd6ee0..eb90989 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeInsertTest.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeInsertTest.java
@@ -20,29 +20,32 @@
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 
 /**
  * Tests the RTree insert operation with integer and double fields using various
  * numbers of dimensions and payload fields.
- * 
  * Each tests first fills an RTree with randomly generated tuples. We compare
  * the following operations against expected results: 1. RTree scan. 3.
  * Disk-order scan. 4. Range search.
- * 
  */
 @SuppressWarnings("rawtypes")
 public abstract class AbstractRTreeInsertTest extends AbstractRTreeTestDriver {
 
     private final RTreeTestUtils rTreeTestUtils;
 
-    public AbstractRTreeInsertTest() {
+    public AbstractRTreeInsertTest(boolean testRstarPolicy) {
+    	super(testRstarPolicy);
         this.rTreeTestUtils = new RTreeTestUtils();
     }
 
     @Override
     protected void runTest(ISerializerDeserializer[] fieldSerdes,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, ITupleReference key) throws Exception {
-        AbstractRTreeTestContext ctx = createTestContext(fieldSerdes, valueProviderFactories, numKeys);
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, ITupleReference key,
+            RTreePolicyType rtreePolicyType) throws Exception {
+        AbstractRTreeTestContext ctx = createTestContext(fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType);
+        ctx.getIndex().create();
+        ctx.getIndex().activate();
         // We assume all fieldSerdes are of the same type. Check the first one
         // to determine which field types to generate.
         if (fieldSerdes[0] instanceof IntegerSerializerDeserializer) {
@@ -54,7 +57,8 @@
         rTreeTestUtils.checkScan(ctx);
         rTreeTestUtils.checkDiskOrderScan(ctx);
         rTreeTestUtils.checkRangeSearch(ctx, key);
-        ctx.getIndex().close();
+        ctx.getIndex().deactivate();
+        ctx.getIndex().destroy();
     }
 
     @Override
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeMultiThreadTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeMultiThreadTest.java
index 2c185a5..0c1b9a5 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeMultiThreadTest.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeMultiThreadTest.java
@@ -31,25 +31,32 @@
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
-import edu.uci.ics.hyracks.storage.am.common.ITreeIndexTestWorkerFactory;
-import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestWorkerFactory;
+import edu.uci.ics.hyracks.storage.am.common.IndexMultiThreadTestDriver;
 import edu.uci.ics.hyracks.storage.am.common.TestWorkloadConf;
-import edu.uci.ics.hyracks.storage.am.common.TreeIndexMultiThreadTestDriver;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
 
 @SuppressWarnings("rawtypes")
 public abstract class AbstractRTreeMultiThreadTest {
 
+    protected final boolean testRstarPolicy;
+
+    public AbstractRTreeMultiThreadTest(boolean testRstarPolicy) {
+        this.testRstarPolicy = testRstarPolicy;
+    }
+
     protected final Logger LOGGER = Logger.getLogger(AbstractRTreeMultiThreadTest.class.getName());
 
     // Machine-specific number of threads to use for testing.
     protected final int REGULAR_NUM_THREADS = Runtime.getRuntime().availableProcessors();
     // Excessive number of threads for testing.
     protected final int EXCESSIVE_NUM_THREADS = Runtime.getRuntime().availableProcessors() * 4;
-    protected final int NUM_OPERATIONS = 5000;
+    protected final int NUM_OPERATIONS = AccessMethodTestsConfig.RTREE_MULTITHREAD_NUM_OPERATIONS;
 
     protected ArrayList<TestWorkloadConf> workloadConfs = getTestWorkloadConf();
 
@@ -59,27 +66,19 @@
 
     protected abstract ITreeIndex createTreeIndex(ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
-            IPrimitiveValueProviderFactory[] valueProviderFactories) throws TreeIndexException;
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType)
+            throws TreeIndexException;
 
-    protected abstract int getFileId();
-
-    protected abstract ITreeIndexTestWorkerFactory getWorkerFactory();
+    protected abstract IIndexTestWorkerFactory getWorkerFactory();
 
     protected abstract ArrayList<TestWorkloadConf> getTestWorkloadConf();
 
     protected abstract String getIndexTypeName();
 
-    protected static float[] getUniformOpProbs(TestOperation[] ops) {
-        float[] opProbs = new float[ops.length];
-        for (int i = 0; i < ops.length; i++) {
-            opProbs[i] = 1.0f / (float) ops.length;
-        }
-        return opProbs;
-    }
-
     protected void runTest(ISerializerDeserializer[] fieldSerdes,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, int numThreads,
-            TestWorkloadConf conf, String dataMsg) throws HyracksException, InterruptedException, TreeIndexException {
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType,
+            int numThreads, TestWorkloadConf conf, String dataMsg) throws HyracksException, InterruptedException,
+            TreeIndexException {
         setUp();
 
         if (LOGGER.isLoggable(Level.INFO)) {
@@ -93,15 +92,16 @@
         IBinaryComparatorFactory[] btreeCmpFactories = SerdeUtils.serdesToComparatorFactories(fieldSerdes,
                 fieldSerdes.length);
 
-        ITreeIndex index = createTreeIndex(typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories);
-        ITreeIndexTestWorkerFactory workerFactory = getWorkerFactory();
+        ITreeIndex index = createTreeIndex(typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories,
+                rtreePolicyType);
+        IIndexTestWorkerFactory workerFactory = getWorkerFactory();
 
         // 4 batches per thread.
         int batchSize = (NUM_OPERATIONS / numThreads) / 4;
 
-        TreeIndexMultiThreadTestDriver driver = new TreeIndexMultiThreadTestDriver(index, workerFactory, fieldSerdes,
-                conf.ops, conf.opProbs);
-        driver.init(getFileId());
+        IndexMultiThreadTestDriver driver = new IndexMultiThreadTestDriver(index, workerFactory, fieldSerdes, conf.ops,
+                conf.opProbs);
+        driver.init();
         long[] times = driver.run(numThreads, 1, NUM_OPERATIONS, batchSize);
         driver.deinit();
 
@@ -113,7 +113,7 @@
     }
 
     @Test
-    public void twoDimensionsInt() throws InterruptedException, HyracksException, TreeIndexException {
+    public void rtreeTwoDimensionsInt() throws InterruptedException, HyracksException, TreeIndexException {
         ISerializerDeserializer[] fieldSerdes = { IntegerSerializerDeserializer.INSTANCE,
                 IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
                 IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE };
@@ -125,13 +125,36 @@
         String dataMsg = "Two Dimensions Of Integer Values";
 
         for (TestWorkloadConf conf : workloadConfs) {
-            runTest(fieldSerdes, valueProviderFactories, numKeys, REGULAR_NUM_THREADS, conf, dataMsg);
-            runTest(fieldSerdes, valueProviderFactories, numKeys, EXCESSIVE_NUM_THREADS, conf, dataMsg);
+            runTest(fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RTREE, REGULAR_NUM_THREADS, conf,
+                    dataMsg);
+            runTest(fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RTREE, EXCESSIVE_NUM_THREADS, conf,
+                    dataMsg);
         }
     }
 
     @Test
-    public void fourDimensionsDouble() throws InterruptedException, HyracksException, TreeIndexException {
+    public void rtreeTwoDimensionsDouble() throws Exception {
+        ISerializerDeserializer[] fieldSerdes = { DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE };
+
+        int numKeys = 4;
+        IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils.createPrimitiveValueProviderFactories(
+                numKeys, DoublePointable.FACTORY);
+
+        String dataMsg = "Two Dimensions Of Double Values";
+
+        for (TestWorkloadConf conf : workloadConfs) {
+            runTest(fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RTREE, REGULAR_NUM_THREADS, conf,
+                    dataMsg);
+            runTest(fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RTREE, EXCESSIVE_NUM_THREADS, conf,
+                    dataMsg);
+        }
+
+    }
+
+    @Test
+    public void rtreeFourDimensionsDouble() throws InterruptedException, HyracksException, TreeIndexException {
         ISerializerDeserializer[] fieldSerdes = { DoubleSerializerDeserializer.INSTANCE,
                 DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
                 DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
@@ -145,8 +168,95 @@
         String dataMsg = "Four Dimensions Of Double Values";
 
         for (TestWorkloadConf conf : workloadConfs) {
-            runTest(fieldSerdes, valueProviderFactories, numKeys, REGULAR_NUM_THREADS, conf, dataMsg);
-            runTest(fieldSerdes, valueProviderFactories, numKeys, EXCESSIVE_NUM_THREADS, conf, dataMsg);
+            runTest(fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RTREE, REGULAR_NUM_THREADS, conf,
+                    dataMsg);
+            runTest(fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RTREE, EXCESSIVE_NUM_THREADS, conf,
+                    dataMsg);
         }
     }
+
+    @Test
+    public void rstartreeTwoDimensionsInt() throws InterruptedException, HyracksException, TreeIndexException {
+        if (!testRstarPolicy) {
+            if (LOGGER.isLoggable(Level.INFO)) {
+                LOGGER.info("Ignoring RTree Multithread Test With Two Dimensions With Integer Keys.");
+            }
+            return;
+        }
+
+        ISerializerDeserializer[] fieldSerdes = { IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE };
+
+        int numKeys = 4;
+        IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils.createPrimitiveValueProviderFactories(
+                numKeys, IntegerPointable.FACTORY);
+
+        String dataMsg = "Two Dimensions Of Integer Values";
+
+        for (TestWorkloadConf conf : workloadConfs) {
+            runTest(fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RSTARTREE, REGULAR_NUM_THREADS, conf,
+                    dataMsg);
+            runTest(fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RSTARTREE, EXCESSIVE_NUM_THREADS,
+                    conf, dataMsg);
+        }
+    }
+
+    @Test
+    public void rstartreeTwoDimensionsDouble() throws Exception {
+        if (!testRstarPolicy) {
+            if (LOGGER.isLoggable(Level.INFO)) {
+                LOGGER.info("Ignoring RTree Multithread Test With Two Dimensions With Double Keys.");
+            }
+            return;
+        }
+
+        ISerializerDeserializer[] fieldSerdes = { DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE };
+
+        int numKeys = 4;
+        IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils.createPrimitiveValueProviderFactories(
+                numKeys, DoublePointable.FACTORY);
+
+        String dataMsg = "Two Dimensions Of Double Values";
+
+        for (TestWorkloadConf conf : workloadConfs) {
+            runTest(fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RSTARTREE, REGULAR_NUM_THREADS, conf,
+                    dataMsg);
+            runTest(fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RSTARTREE, EXCESSIVE_NUM_THREADS,
+                    conf, dataMsg);
+        }
+
+    }
+
+    @Test
+    public void rstartreeFourDimensionsDouble() throws InterruptedException, HyracksException, TreeIndexException {
+        if (!testRstarPolicy) {
+            if (LOGGER.isLoggable(Level.INFO)) {
+                LOGGER.info("Ignoring RTree Multithread Test With Four Dimensions With Double Keys.");
+            }
+            return;
+        }
+
+        ISerializerDeserializer[] fieldSerdes = { DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE };
+
+        int numKeys = 8;
+        IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils.createPrimitiveValueProviderFactories(
+                numKeys, DoublePointable.FACTORY);
+
+        String dataMsg = "Four Dimensions Of Double Values";
+
+        for (TestWorkloadConf conf : workloadConfs) {
+            runTest(fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RSTARTREE, REGULAR_NUM_THREADS, conf,
+                    dataMsg);
+            runTest(fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RSTARTREE, EXCESSIVE_NUM_THREADS,
+                    conf, dataMsg);
+        }
+    }
+
 }
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeTestContext.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeTestContext.java
index 9affc47..eed8df6 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeTestContext.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeTestContext.java
@@ -15,17 +15,17 @@
 
 package edu.uci.ics.hyracks.storage.am.rtree;
 
-import java.util.ArrayList;
 import java.util.Collection;
 
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.storage.am.common.TreeIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.common.IndexTestContext;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.util.HashMultiSet;
 
 @SuppressWarnings("rawtypes")
-public abstract class AbstractRTreeTestContext extends TreeIndexTestContext<RTreeCheckTuple> {
-    private final ArrayList<RTreeCheckTuple> checkTuples = new ArrayList<RTreeCheckTuple>();
-
+public abstract class AbstractRTreeTestContext extends IndexTestContext<RTreeCheckTuple> {
+    private final HashMultiSet<RTreeCheckTuple> checkTuples = new HashMultiSet<RTreeCheckTuple>();
+	
     public AbstractRTreeTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) {
         super(fieldSerdes, treeIndex);
     }
@@ -34,5 +34,4 @@
     public Collection<RTreeCheckTuple> getCheckTuples() {
         return checkTuples;
     }
-
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeTestDriver.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeTestDriver.java
index 10f4364..de92823 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeTestDriver.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/AbstractRTreeTestDriver.java
@@ -29,26 +29,36 @@
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
 
 @SuppressWarnings("rawtypes")
 public abstract class AbstractRTreeTestDriver {
+    protected final boolean testRstarPolicy;
+
+    public AbstractRTreeTestDriver(boolean testRstarPolicy) {
+        this.testRstarPolicy = testRstarPolicy;
+    }
+
     protected final Logger LOGGER = Logger.getLogger(AbstractRTreeTestDriver.class.getName());
 
-    protected static final int numTuplesToInsert = 5000;
+    protected static final int numTuplesToInsert = AccessMethodTestsConfig.RTREE_NUM_TUPLES_TO_INSERT;
 
     protected abstract AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys) throws Exception;
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
+            throws Exception;
 
     protected abstract Random getRandom();
 
     protected abstract void runTest(ISerializerDeserializer[] fieldSerdes,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, ITupleReference key) throws Exception;
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, ITupleReference key,
+            RTreePolicyType rtreePolicyType) throws Exception;
 
     protected abstract String getTestOpName();
 
     @Test
-    public void twoDimensionsInt() throws Exception {
+    public void rtreeTwoDimensionsInt() throws Exception {
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("RTree " + getTestOpName() + " Test With Two Dimensions With Integer Keys.");
         }
@@ -64,12 +74,12 @@
         // and the top right coordinates are 1000, 1000
         ITupleReference key = TupleUtils.createIntegerTuple(-1000, -1000, 1000, 1000);
 
-        runTest(fieldSerdes, valueProviderFactories, numKeys, key);
+        runTest(fieldSerdes, valueProviderFactories, numKeys, key, RTreePolicyType.RTREE);
 
     }
 
     @Test
-    public void twoDimensionsDouble() throws Exception {
+    public void rtreeTwoDimensionsDouble() throws Exception {
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("RTree " + getTestOpName() + " Test With Two Dimensions With Double Keys.");
         }
@@ -85,12 +95,12 @@
         // -1000.0 and the top right coordinates are 1000.0, 1000.0
         ITupleReference key = TupleUtils.createDoubleTuple(-1000.0, -1000.0, 1000.0, 1000.0);
 
-        runTest(fieldSerdes, valueProviderFactories, numKeys, key);
+        runTest(fieldSerdes, valueProviderFactories, numKeys, key, RTreePolicyType.RTREE);
 
     }
 
     @Test
-    public void fourDimensionsDouble() throws Exception {
+    public void rtreeFourDimensionsDouble() throws Exception {
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("RTree " + getTestOpName() + " Test With Four Dimensions With Double Keys.");
         }
@@ -110,7 +120,90 @@
         ITupleReference key = TupleUtils.createDoubleTuple(-1000.0, -1000.0, -1000.0, -1000.0, 1000.0, 1000.0, 1000.0,
                 1000.0);
 
-        runTest(fieldSerdes, valueProviderFactories, numKeys, key);
+        runTest(fieldSerdes, valueProviderFactories, numKeys, key, RTreePolicyType.RTREE);
+    }
 
+    @Test
+    public void rstartreeTwoDimensionsInt() throws Exception {
+        if (!testRstarPolicy) {
+            if (LOGGER.isLoggable(Level.INFO)) {
+                LOGGER.info("Ignoring RTree " + getTestOpName() + " Test With Two Dimensions With Integer Keys.");
+            }
+            return;
+        }
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("RTree " + getTestOpName() + " Test With Two Dimensions With Integer Keys.");
+        }
+
+        ISerializerDeserializer[] fieldSerdes = { IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE };
+
+        int numKeys = 4;
+        IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils.createPrimitiveValueProviderFactories(
+                numKeys, IntegerPointable.FACTORY);
+        // Range search, the rectangle bottom left coordinates are -1000, -1000
+        // and the top right coordinates are 1000, 1000
+        ITupleReference key = TupleUtils.createIntegerTuple(-1000, -1000, 1000, 1000);
+
+        runTest(fieldSerdes, valueProviderFactories, numKeys, key, RTreePolicyType.RSTARTREE);
+
+    }
+
+    @Test
+    public void rstartreeTwoDimensionsDouble() throws Exception {
+        if (!testRstarPolicy) {
+            if (LOGGER.isLoggable(Level.INFO)) {
+                LOGGER.info("Ignoring RTree " + getTestOpName() + " Test With Two Dimensions With Double Keys.");
+            }
+            return;
+        }
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("RTree " + getTestOpName() + " Test With Two Dimensions With Double Keys.");
+        }
+
+        ISerializerDeserializer[] fieldSerdes = { DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE };
+
+        int numKeys = 4;
+        IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils.createPrimitiveValueProviderFactories(
+                numKeys, DoublePointable.FACTORY);
+        // Range search, the rectangle bottom left coordinates are -1000.0,
+        // -1000.0 and the top right coordinates are 1000.0, 1000.0
+        ITupleReference key = TupleUtils.createDoubleTuple(-1000.0, -1000.0, 1000.0, 1000.0);
+
+        runTest(fieldSerdes, valueProviderFactories, numKeys, key, RTreePolicyType.RSTARTREE);
+
+    }
+
+    @Test
+    public void rstartreeFourDimensionsDouble() throws Exception {
+        if (!testRstarPolicy) {
+            if (LOGGER.isLoggable(Level.INFO)) {
+                LOGGER.info("Ignoring RTree " + getTestOpName() + " Test With Four Dimensions With Double Keys.");
+            }
+            return;
+        }
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("RTree " + getTestOpName() + " Test With Four Dimensions With Double Keys.");
+        }
+
+        ISerializerDeserializer[] fieldSerdes = { DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE,
+                DoubleSerializerDeserializer.INSTANCE, DoubleSerializerDeserializer.INSTANCE };
+
+        int numKeys = 8;
+        IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils.createPrimitiveValueProviderFactories(
+                numKeys, DoublePointable.FACTORY);
+        // Range search, the rectangle bottom left coordinates are -1000.0,
+        // -1000.0, -1000.0, -1000.0 and the top right coordinates are 1000.0,
+        // 1000.0, 1000.0, 1000.0
+        ITupleReference key = TupleUtils.createDoubleTuple(-1000.0, -1000.0, -1000.0, -1000.0, 1000.0, 1000.0, 1000.0,
+                1000.0);
+
+        runTest(fieldSerdes, valueProviderFactories, numKeys, key, RTreePolicyType.RSTARTREE);
     }
 }
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeCheckTuple.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeCheckTuple.java
index 98800e5..c498136 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeCheckTuple.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeCheckTuple.java
@@ -27,8 +27,8 @@
     @Override
     public boolean equals(Object o) {
         RTreeCheckTuple<T> other = (RTreeCheckTuple<T>) o;
-        for (int i = 0; i < tuple.length; i++) {
-            int cmp = tuple[i].compareTo(other.get(i));
+        for (int i = 0; i < fields.length; i++) {
+            int cmp = fields[i].compareTo(other.getField(i));
             if (cmp != 0) {
                 return false;
             }
@@ -41,11 +41,11 @@
         int maxFieldPos = numKeys / 2;
         for (int i = 0; i < maxFieldPos; i++) {
             int j = maxFieldPos + i;
-            int cmp = tuple[i].compareTo(other.get(j));
+            int cmp = fields[i].compareTo(other.getField(j));
             if (cmp > 0) {
                 return false;
             }
-            cmp = tuple[j].compareTo(other.get(i));
+            cmp = fields[j].compareTo(other.getField(i));
             if (cmp < 0) {
                 return false;
             }
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeTestUtils.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeTestUtils.java
index a23f375..067c6cb 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeTestUtils.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeTestUtils.java
@@ -15,12 +15,13 @@
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
 import edu.uci.ics.hyracks.storage.am.common.CheckTuple;
-import edu.uci.ics.hyracks.storage.am.common.ITreeIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestContext;
 import edu.uci.ics.hyracks.storage.am.common.TreeIndexTestUtils;
 import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.util.HashMultiSet;
 import edu.uci.ics.hyracks.storage.am.rtree.impls.SearchPredicate;
 import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
 
@@ -32,9 +33,9 @@
 
     @SuppressWarnings("unchecked")
     // Create a new ArrayList containing the elements satisfying the search key
-    public ArrayList<RTreeCheckTuple> getRangeSearchExpectedResults(ArrayList<RTreeCheckTuple> checkTuples,
+    public HashMultiSet<RTreeCheckTuple> getRangeSearchExpectedResults(Collection<RTreeCheckTuple> checkTuples,
             RTreeCheckTuple key) {
-        ArrayList<RTreeCheckTuple> expectedResult = new ArrayList<RTreeCheckTuple>();
+        HashMultiSet<RTreeCheckTuple> expectedResult = new HashMultiSet<RTreeCheckTuple>();
         Iterator<RTreeCheckTuple> iter = checkTuples.iterator();
         while (iter.hasNext()) {
             RTreeCheckTuple t = iter.next();
@@ -45,7 +46,7 @@
         return expectedResult;
     }
 
-    public void checkRangeSearch(ITreeIndexTestContext ictx, ITupleReference key) throws Exception {
+    public void checkRangeSearch(IIndexTestContext ictx, ITupleReference key) throws Exception {
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("Testing Range Search.");
         }
@@ -61,14 +62,14 @@
         RTreeCheckTuple keyCheck = (RTreeCheckTuple) createCheckTupleFromTuple(key, ctx.getFieldSerdes(),
                 cmp.getKeyFieldCount());
 
-        ArrayList<RTreeCheckTuple> expectedResult = null;
+        HashMultiSet<RTreeCheckTuple> expectedResult = null;
 
-        expectedResult = getRangeSearchExpectedResults((ArrayList<RTreeCheckTuple>) ctx.getCheckTuples(), keyCheck);
+        expectedResult = getRangeSearchExpectedResults(ctx.getCheckTuples(), keyCheck);
         checkExpectedResults(searchCursor, expectedResult, ctx.getFieldSerdes(), ctx.getKeyFieldCount(), null);
     }
 
     @SuppressWarnings("unchecked")
-    public void insertDoubleTuples(ITreeIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
+    public void insertDoubleTuples(IIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
         int fieldCount = ctx.getFieldCount();
         int numKeyFields = ctx.getKeyFieldCount();
         double[] fieldValues = new double[ctx.getFieldCount()];
@@ -111,7 +112,7 @@
             fieldValues[k] = secondValue;
         }
     }
-    
+
     private void setDoublePayloadFields(double[] fieldValues, int numKeyFields, int numFields) {
         for (int j = numKeyFields; j < numFields; j++) {
             fieldValues[j] = doublePayloadValue++;
@@ -122,13 +123,13 @@
     protected CheckTuple createDoubleCheckTuple(double[] fieldValues, int numKeyFields) {
         RTreeCheckTuple<Double> checkTuple = new RTreeCheckTuple<Double>(fieldValues.length, numKeyFields);
         for (double v : fieldValues) {
-            checkTuple.add(v);
+            checkTuple.appendField(v);
         }
         return checkTuple;
     }
 
     @SuppressWarnings("unchecked")
-    public void bulkLoadDoubleTuples(ITreeIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
+    public void bulkLoadDoubleTuples(IIndexTestContext ctx, int numTuples, Random rnd) throws Exception {
         int fieldCount = ctx.getFieldCount();
         int numKeyFields = ctx.getKeyFieldCount();
         double[] fieldValues = new double[ctx.getFieldCount()];
@@ -194,7 +195,7 @@
     protected CheckTuple createIntCheckTuple(int[] fieldValues, int numKeyFields) {
         RTreeCheckTuple<Integer> checkTuple = new RTreeCheckTuple<Integer>(fieldValues.length, numKeyFields);
         for (int v : fieldValues) {
-            checkTuple.add(v);
+            checkTuple.appendField(v);
         }
         return checkTuple;
     }
@@ -213,7 +214,7 @@
             fieldValues[k] = secondValue;
         }
     }
-    
+
     @Override
     protected void setIntPayloadFields(int[] fieldValues, int numKeyFields, int numFields) {
         for (int j = numKeyFields; j < numFields; j++) {
@@ -227,12 +228,12 @@
     }
 
     @Override
-    protected ArrayTupleBuilder createDeleteTupleBuilder(ITreeIndexTestContext ctx) {
+    protected ArrayTupleBuilder createDeleteTupleBuilder(IIndexTestContext ctx) {
         return new ArrayTupleBuilder(ctx.getFieldCount());
     }
 
     @Override
-    protected boolean checkDiskOrderScanResult(ITupleReference tuple, CheckTuple checkTuple, ITreeIndexTestContext ctx)
+    protected boolean checkDiskOrderScanResult(ITupleReference tuple, CheckTuple checkTuple, IIndexTestContext ctx)
             throws HyracksDataException {
         return ctx.getCheckTuples().contains(checkTuple);
     }
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestIndexLifecycleManagerProvider.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestIndexLifecycleManagerProvider.java
new file mode 100644
index 0000000..3a4d3e7
--- /dev/null
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestIndexLifecycleManagerProvider.java
@@ -0,0 +1,16 @@
+package edu.uci.ics.hyracks.test.support;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+
+public class TestIndexLifecycleManagerProvider implements IIndexLifecycleManagerProvider {
+
+    private static final long serialVersionUID = 1L;
+
+    @Override
+    public IIndexLifecycleManager getLifecycleManager(IHyracksTaskContext ctx) {
+        return TestStorageManagerComponentHolder.getIndexLifecycleManager(ctx);
+    }
+
+}
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestIndexRegistryProvider.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestIndexRegistryProvider.java
deleted file mode 100644
index 27d50f5..0000000
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestIndexRegistryProvider.java
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.test.support;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexRegistry;
-
-public class TestIndexRegistryProvider implements IIndexRegistryProvider<IIndex> {
-    private static final long serialVersionUID = 1L;
-
-    @Override
-    public IndexRegistry<IIndex> getRegistry(IHyracksTaskContext ctx) {
-        return TestStorageManagerComponentHolder.getIndexRegistry(ctx);
-    }
-}
\ No newline at end of file
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestJobletContext.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestJobletContext.java
index 7612db9..8285efe 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestJobletContext.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestJobletContext.java
@@ -92,4 +92,18 @@
     public Object getGlobalJobData() {
         return null;
     }
+
+    @Override
+    public Class<?> loadClass(String className) {
+        try {
+            return Class.forName(className);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Override
+    public ClassLoader getClassLoader() {
+        return this.getClass().getClassLoader();
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestNCApplicationContext.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestNCApplicationContext.java
index 0bd872c..285ab1f 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestNCApplicationContext.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestNCApplicationContext.java
@@ -18,6 +18,7 @@
 
 import edu.uci.ics.hyracks.api.application.INCApplicationContext;
 import edu.uci.ics.hyracks.api.context.IHyracksRootContext;
+import edu.uci.ics.hyracks.api.job.IJobSerializerDeserializerContainer;
 import edu.uci.ics.hyracks.api.messages.IMessageBroker;
 
 public class TestNCApplicationContext implements INCApplicationContext {
@@ -38,11 +39,6 @@
     }
 
     @Override
-    public ClassLoader getClassLoader() {
-        return getClass().getClassLoader();
-    }
-
-    @Override
     public Serializable getDistributedState() {
         return distributedState;
     }
@@ -63,15 +59,9 @@
     }
 
     @Override
-    public String getApplicationName() {
-        // TODO Auto-generated method stub
-        return null;
-    }
-
-    @Override
     public void setMessageBroker(IMessageBroker staticticsConnector) {
         // TODO Auto-generated method stub
-        
+
     }
 
     @Override
@@ -79,4 +69,10 @@
         // TODO Auto-generated method stub
         return null;
     }
+
+	@Override
+	public IJobSerializerDeserializerContainer getJobSerializerDeserializerContainer() {
+		// TODO Auto-generated method stub
+		return null;
+	}
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestStorageManagerComponentHolder.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestStorageManagerComponentHolder.java
index ce5e989..fdb2100 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestStorageManagerComponentHolder.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestStorageManagerComponentHolder.java
@@ -23,8 +23,8 @@
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.api.io.IODeviceHandle;
 import edu.uci.ics.hyracks.control.nc.io.IOManager;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexRegistry;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexLifecycleManager;
 import edu.uci.ics.hyracks.storage.common.buffercache.BufferCache;
 import edu.uci.ics.hyracks.storage.common.buffercache.ClockPageReplacementStrategy;
 import edu.uci.ics.hyracks.storage.common.buffercache.DelayPageCleanerPolicy;
@@ -34,13 +34,20 @@
 import edu.uci.ics.hyracks.storage.common.buffercache.IPageReplacementStrategy;
 import edu.uci.ics.hyracks.storage.common.file.IFileMapManager;
 import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
-import edu.uci.ics.hyracks.storage.common.smi.TransientFileMapManager;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceRepository;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceRepositoryFactory;
+import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactory;
+import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactoryProvider;
+import edu.uci.ics.hyracks.storage.common.file.TransientFileMapManager;
+import edu.uci.ics.hyracks.storage.common.file.TransientLocalResourceRepositoryFactory;
 
 public class TestStorageManagerComponentHolder {
     private static IBufferCache bufferCache;
     private static IFileMapProvider fileMapProvider;
-    private static IndexRegistry<IIndex> indexRegistry;
     private static IOManager ioManager;
+    private static ILocalResourceRepository localResourceRepository;
+    private static IIndexLifecycleManager lcManager;
+    private static ResourceIdFactory resourceIdFactory;
 
     private static int pageSize;
     private static int numPages;
@@ -52,7 +59,15 @@
         TestStorageManagerComponentHolder.maxOpenFiles = maxOpenFiles;
         bufferCache = null;
         fileMapProvider = null;
-        indexRegistry = null;
+        localResourceRepository = null;
+        lcManager = null;
+    }
+
+    public synchronized static IIndexLifecycleManager getIndexLifecycleManager(IHyracksTaskContext ctx) {
+        if (lcManager == null) {
+            lcManager = new IndexLifecycleManager();
+        }
+        return lcManager;
     }
 
     public synchronized static IBufferCache getBufferCache(IHyracksTaskContext ctx) {
@@ -73,13 +88,6 @@
         return fileMapProvider;
     }
 
-    public synchronized static IndexRegistry<IIndex> getIndexRegistry(IHyracksTaskContext ctx) {
-        if (indexRegistry == null) {
-            indexRegistry = new IndexRegistry<IIndex>();
-        }
-        return indexRegistry;
-    }
-
     public synchronized static IOManager getIOManager() throws HyracksException {
         if (ioManager == null) {
             List<IODeviceHandle> devices = new ArrayList<IODeviceHandle>();
@@ -88,4 +96,31 @@
         }
         return ioManager;
     }
+
+    public synchronized static ILocalResourceRepository getLocalResourceRepository(IHyracksTaskContext ctx) {
+        if (localResourceRepository == null) {
+            try {
+                ILocalResourceRepositoryFactory localResourceRepositoryFactory = new TransientLocalResourceRepositoryFactory();
+                localResourceRepository = localResourceRepositoryFactory.createRepository();
+            } catch (HyracksException e) {
+                //In order not to change the IStorageManagerInterface due to the test code, throw runtime exception.
+                throw new IllegalArgumentException();
+            }
+        }
+        return localResourceRepository;
+    }
+
+    public synchronized static ResourceIdFactory getResourceIdFactory(IHyracksTaskContext ctx) {
+        if (resourceIdFactory == null) {
+            try {
+                ResourceIdFactoryProvider resourceIdFactoryFactory = new ResourceIdFactoryProvider(
+                        getLocalResourceRepository(ctx));
+                resourceIdFactory = resourceIdFactoryFactory.createResourceIdFactory();
+            } catch (HyracksException e) {
+                //In order not to change the IStorageManagerInterface due to the test code, throw runtime exception.
+                throw new IllegalArgumentException();
+            }
+        }
+        return resourceIdFactory;
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestStorageManagerInterface.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestStorageManagerInterface.java
index 4059ef0..26c7861 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestStorageManagerInterface.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestStorageManagerInterface.java
@@ -15,9 +15,12 @@
 package edu.uci.ics.hyracks.test.support;
 
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceRepository;
+import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactory;
 
 public class TestStorageManagerInterface implements IStorageManagerInterface {
     private static final long serialVersionUID = 1L;
@@ -31,4 +34,14 @@
     public IFileMapProvider getFileMapProvider(IHyracksTaskContext ctx) {
         return TestStorageManagerComponentHolder.getFileMapProvider(ctx);
     }
+
+    @Override
+    public ILocalResourceRepository getLocalResourceRepository(IHyracksTaskContext ctx) {
+        return TestStorageManagerComponentHolder.getLocalResourceRepository(ctx);
+    }
+
+	@Override
+	public ResourceIdFactory getResourceIdFactory(IHyracksTaskContext ctx) {
+		return TestStorageManagerComponentHolder.getResourceIdFactory(ctx);
+	}
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestTaskContext.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestTaskContext.java
index 0ca93b2..8311ebd 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestTaskContext.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestTaskContext.java
@@ -21,6 +21,7 @@
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
 import edu.uci.ics.hyracks.api.dataflow.state.IStateObject;
 import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionManager;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.api.io.FileReference;
@@ -107,7 +108,7 @@
     }
 
     @Override
-    public void sendApplicationMessageToCC(byte[] message, String nodeId) throws Exception {
+    public void sendApplicationMessageToCC(byte[] message, DeploymentId deploymentId, String nodeId) throws Exception {
         // TODO Auto-generated method stub
 
     }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/pom.xml b/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/pom.xml
new file mode 100644
index 0000000..edf9d08
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/pom.xml
@@ -0,0 +1,47 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <artifactId>hyracks-storage-am-bloomfilter-test</artifactId>
+
+  <parent>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks-tests</artifactId>
+    <version>0.2.5-SNAPSHOT</version>
+  </parent>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.0.2</version>
+        <configuration>
+          <source>1.7</source>
+          <target>1.7</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+  	<dependency>
+  		<groupId>junit</groupId>
+  		<artifactId>junit</artifactId>
+  		<version>4.8.1</version>
+  		<type>jar</type>
+  		<scope>test</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-bloomfilter</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-test-support</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>test</scope>
+  	</dependency>
+  </dependencies>
+</project>
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/src/test/java/edu/uci/ics/hyracks/storage/am/bloomfilter/BloomFilterTest.java b/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/src/test/java/edu/uci/ics/hyracks/storage/am/bloomfilter/BloomFilterTest.java
new file mode 100644
index 0000000..6dab32c
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/src/test/java/edu/uci/ics/hyracks/storage/am/bloomfilter/BloomFilterTest.java
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.bloomfilter;
+
+import java.util.ArrayList;
+import java.util.Random;
+import java.util.TreeSet;
+import java.util.logging.Level;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomCalculations;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilter;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.BloomFilterSpecification;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.util.AbstractBloomFilterTest;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+
+@SuppressWarnings("rawtypes")
+public class BloomFilterTest extends AbstractBloomFilterTest {
+    private final Random rnd = new Random(50);
+
+    @Before
+    public void setUp() throws HyracksDataException {
+        super.setUp();
+    }
+
+    @Test
+    public void singleFieldTest() throws Exception {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("TESTING BLOOM FILTER");
+        }
+
+        IBufferCache bufferCache = harness.getBufferCache();
+
+        int numElements = 100;
+        int[] keyFields = { 0 };
+
+        BloomFilter bf = new BloomFilter(bufferCache, harness.getFileMapProvider(), harness.getFileReference(),
+                keyFields);
+
+        double acceptanleFalsePositiveRate = 0.1;
+        int maxBucketsPerElement = BloomCalculations.maxBucketsPerElement(numElements);
+        BloomFilterSpecification bloomFilterSpec = BloomCalculations.computeBloomSpec(maxBucketsPerElement,
+                acceptanleFalsePositiveRate);
+
+        bf.create();
+        bf.activate();
+        IIndexBulkLoader builder = bf.createBuilder(numElements, bloomFilterSpec.getNumHashes(),
+                bloomFilterSpec.getNumBucketsPerElements());
+
+        int fieldCount = 2;
+        ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(fieldCount);
+        ArrayTupleReference tuple = new ArrayTupleReference();
+
+        // generate keys
+        int maxKey = 1000;
+        TreeSet<Integer> uniqueKeys = new TreeSet<Integer>();
+        ArrayList<Integer> keys = new ArrayList<Integer>();
+        while (uniqueKeys.size() < numElements) {
+            int key = rnd.nextInt() % maxKey;
+            uniqueKeys.add(key);
+        }
+        for (Integer i : uniqueKeys) {
+            keys.add(i);
+        }
+
+        // Insert tuples in the bloom filter
+        for (int i = 0; i < keys.size(); ++i) {
+            TupleUtils.createIntegerTuple(tupleBuilder, tuple, keys.get(i), i);
+            builder.add(tuple);
+        }
+        builder.end();
+
+        // Check all the inserted tuples can be found.
+
+        long[] hashes = new long[2];
+        for (int i = 0; i < keys.size(); ++i) {
+            TupleUtils.createIntegerTuple(tupleBuilder, tuple, keys.get(i), i);
+            Assert.assertTrue(bf.contains(tuple, hashes));
+        }
+
+        bf.deactivate();
+        bf.destroy();
+    }
+
+    @Test
+    public void multiFieldTest() throws Exception {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("TESTING BLOOM FILTER");
+        }
+
+        IBufferCache bufferCache = harness.getBufferCache();
+
+        int numElements = 10000;
+        int[] keyFields = { 2, 4, 1 };
+
+        BloomFilter bf = new BloomFilter(bufferCache, harness.getFileMapProvider(), harness.getFileReference(),
+                keyFields);
+
+        double acceptanleFalsePositiveRate = 0.1;
+        int maxBucketsPerElement = BloomCalculations.maxBucketsPerElement(numElements);
+        BloomFilterSpecification bloomFilterSpec = BloomCalculations.computeBloomSpec(maxBucketsPerElement,
+                acceptanleFalsePositiveRate);
+
+        bf.create();
+        bf.activate();
+        IIndexBulkLoader builder = bf.createBuilder(numElements, bloomFilterSpec.getNumHashes(),
+                bloomFilterSpec.getNumBucketsPerElements());
+
+        int fieldCount = 5;
+        ISerializerDeserializer[] fieldSerdes = { UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE };
+        ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(fieldCount);
+        ArrayTupleReference tuple = new ArrayTupleReference();
+
+        int maxLength = 20;
+        ArrayList<String> s1 = new ArrayList<String>();
+        ArrayList<String> s2 = new ArrayList<String>();
+        ArrayList<String> s3 = new ArrayList<String>();
+        ArrayList<String> s4 = new ArrayList<String>();
+        for (int i = 0; i < numElements; ++i) {
+            s1.add(randomString(rnd.nextInt() % maxLength, rnd));
+            s2.add(randomString(rnd.nextInt() % maxLength, rnd));
+            s3.add(randomString(rnd.nextInt() % maxLength, rnd));
+            s4.add(randomString(rnd.nextInt() % maxLength, rnd));
+        }
+
+        for (int i = 0; i < numElements; ++i) {
+            TupleUtils.createTuple(tupleBuilder, tuple, fieldSerdes, s1.get(i), s2.get(i), i, s3.get(i), s4.get(i));
+            builder.add(tuple);
+        }
+        builder.end();
+
+        long[] hashes = new long[2];
+        for (int i = 0; i < numElements; ++i) {
+            TupleUtils.createTuple(tupleBuilder, tuple, fieldSerdes, s1.get(i), s2.get(i), i, s3.get(i), s4.get(i));
+            Assert.assertTrue(bf.contains(tuple, hashes));
+        }
+
+        bf.deactivate();
+        bf.destroy();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/src/test/java/edu/uci/ics/hyracks/storage/am/bloomfilter/MurmurHashForITupleReferenceTest.java b/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/src/test/java/edu/uci/ics/hyracks/storage/am/bloomfilter/MurmurHashForITupleReferenceTest.java
new file mode 100644
index 0000000..284a6cb
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/src/test/java/edu/uci/ics/hyracks/storage/am/bloomfilter/MurmurHashForITupleReferenceTest.java
@@ -0,0 +1,296 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.bloomfilter;
+
+import java.nio.ByteBuffer;
+import java.util.Random;
+import java.util.logging.Level;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.MurmurHash128Bit;
+import edu.uci.ics.hyracks.storage.am.bloomfilter.util.AbstractBloomFilterTest;
+
+@SuppressWarnings("rawtypes")
+public class MurmurHashForITupleReferenceTest extends AbstractBloomFilterTest {
+    private final static int NUM_LONG_VARS_FOR_128_BIT_HASH = 2;
+    private final static int DUMMY_FIELD = 0;
+    private final Random rnd = new Random(50);
+
+    @Before
+    public void setUp() throws HyracksDataException {
+        super.setUp();
+    }
+
+    @Test
+    public void murmurhashONEIntegerFieldTest() throws Exception {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("TESTING MURMUR HASH ONE INTEGER FIELD");
+        }
+
+        int fieldCount = 2;
+        ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(fieldCount);
+        ArrayTupleReference tuple = new ArrayTupleReference();
+        TupleUtils.createIntegerTuple(tupleBuilder, tuple, rnd.nextInt());
+        tuple.reset(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray());
+
+        int keyFields[] = { 0 };
+        int length = getTupleSize(tuple, keyFields);
+
+        long actuals[] = new long[NUM_LONG_VARS_FOR_128_BIT_HASH];
+        MurmurHash128Bit.hash3_x64_128(tuple, keyFields, 0L, actuals);
+
+        ByteBuffer buffer;
+        byte[] array = new byte[length];
+        fillArrayWithData(array, keyFields, tuple, length);
+        buffer = ByteBuffer.wrap(array);
+
+        long[] expecteds = hash3_x64_128(buffer, 0, length, 0L);
+        Assert.assertArrayEquals(expecteds, actuals);
+    }
+
+    @Test
+    public void murmurhashTwoIntegerFieldsTest() throws Exception {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("TESTING MURMUR HASH TWO INTEGER FIELDS");
+        }
+
+        int fieldCount = 2;
+        ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(fieldCount);
+        ArrayTupleReference tuple = new ArrayTupleReference();
+        TupleUtils.createIntegerTuple(tupleBuilder, tuple, rnd.nextInt(), rnd.nextInt());
+        tuple.reset(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray());
+
+        int keyFields[] = { 0, 1 };
+        int length = getTupleSize(tuple, keyFields);
+
+        long actuals[] = new long[NUM_LONG_VARS_FOR_128_BIT_HASH];
+        MurmurHash128Bit.hash3_x64_128(tuple, keyFields, 0L, actuals);
+
+        ByteBuffer buffer;
+        byte[] array = new byte[length];
+        fillArrayWithData(array, keyFields, tuple, length);
+        buffer = ByteBuffer.wrap(array);
+
+        long[] expecteds = hash3_x64_128(buffer, 0, length, 0L);
+        Assert.assertArrayEquals(expecteds, actuals);
+    }
+
+    @Test
+    public void murmurhashOneStringFieldTest() throws Exception {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("TESTING MURMUR HASH ONE STRING FIELD");
+        }
+
+        int fieldCount = 2;
+        ISerializerDeserializer[] fieldSerdes = { UTF8StringSerializerDeserializer.INSTANCE };
+        ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(fieldCount);
+        ArrayTupleReference tuple = new ArrayTupleReference();
+        String s = randomString(100, rnd);
+        TupleUtils.createTuple(tupleBuilder, tuple, fieldSerdes, s);
+
+        int keyFields[] = { 0 };
+        int length = getTupleSize(tuple, keyFields);
+
+        long actuals[] = new long[NUM_LONG_VARS_FOR_128_BIT_HASH];
+        MurmurHash128Bit.hash3_x64_128(tuple, keyFields, 0L, actuals);
+
+        byte[] array = new byte[length];
+        ByteBuffer buffer;
+        fillArrayWithData(array, keyFields, tuple, length);
+        buffer = ByteBuffer.wrap(array);
+
+        long[] expecteds = hash3_x64_128(buffer, 0, length, 0L);
+        Assert.assertArrayEquals(expecteds, actuals);
+    }
+
+    @Test
+    public void murmurhashThreeStringFieldsTest() throws Exception {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("TESTING MURMUR HASH THREE STRING FIELDS");
+        }
+
+        int fieldCount = 3;
+        ISerializerDeserializer[] fieldSerdes = { UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE };
+        ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(fieldCount);
+        ArrayTupleReference tuple = new ArrayTupleReference();
+        String s1 = randomString(40, rnd);
+        String s2 = randomString(60, rnd);
+        String s3 = randomString(20, rnd);
+        TupleUtils.createTuple(tupleBuilder, tuple, fieldSerdes, s1, s2, s3);
+
+        int keyFields[] = { 2, 0, 1 };
+        int length = getTupleSize(tuple, keyFields);
+
+        long actuals[] = new long[NUM_LONG_VARS_FOR_128_BIT_HASH];
+        MurmurHash128Bit.hash3_x64_128(tuple, keyFields, 0L, actuals);
+
+        byte[] array = new byte[length];
+        ByteBuffer buffer;
+        fillArrayWithData(array, keyFields, tuple, length);
+        buffer = ByteBuffer.wrap(array);
+
+        long[] expecteds = hash3_x64_128(buffer, 0, length, 0L);
+        Assert.assertArrayEquals(expecteds, actuals);
+    }
+
+    private void fillArrayWithData(byte[] array, int[] keyFields, ITupleReference tuple, int length) {
+        int currentFieldIndex = 0;
+        int bytePos = 0;
+        for (int i = 0; i < length; ++i) {
+            array[i] = tuple.getFieldData(DUMMY_FIELD)[tuple.getFieldStart(keyFields[currentFieldIndex]) + bytePos];
+            ++bytePos;
+            if (tuple.getFieldLength(keyFields[currentFieldIndex]) == bytePos) {
+                ++currentFieldIndex;
+                bytePos = 0;
+            }
+        }
+    }
+
+    private int getTupleSize(ITupleReference tuple, int[] keyFields) {
+        int length = 0;
+        for (int i = 0; i < keyFields.length; ++i) {
+            length += tuple.getFieldLength(keyFields[i]);
+        }
+        return length;
+    }
+
+    /**
+     * The hash3_x64_128 and getblock functions are borrowed from cassandra source code for testing purpose
+     **/
+    protected static long getblock(ByteBuffer key, int offset, int index) {
+        int i_8 = index << 3;
+        int blockOffset = offset + i_8;
+        return ((long) key.get(blockOffset + 0) & 0xff) + (((long) key.get(blockOffset + 1) & 0xff) << 8)
+                + (((long) key.get(blockOffset + 2) & 0xff) << 16) + (((long) key.get(blockOffset + 3) & 0xff) << 24)
+                + (((long) key.get(blockOffset + 4) & 0xff) << 32) + (((long) key.get(blockOffset + 5) & 0xff) << 40)
+                + (((long) key.get(blockOffset + 6) & 0xff) << 48) + (((long) key.get(blockOffset + 7) & 0xff) << 56);
+    }
+
+    public static long[] hash3_x64_128(ByteBuffer key, int offset, int length, long seed) {
+        final int nblocks = length >> 4; // Process as 128-bit blocks.
+
+        long h1 = seed;
+        long h2 = seed;
+
+        long c1 = 0x87c37b91114253d5L;
+        long c2 = 0x4cf5ad432745937fL;
+
+        //----------
+        // body
+
+        for (int i = 0; i < nblocks; i++) {
+            long k1 = getblock(key, offset, i * 2 + 0);
+            long k2 = getblock(key, offset, i * 2 + 1);
+
+            k1 *= c1;
+            k1 = MurmurHash128Bit.rotl64(k1, 31);
+            k1 *= c2;
+            h1 ^= k1;
+
+            h1 = MurmurHash128Bit.rotl64(h1, 27);
+            h1 += h2;
+            h1 = h1 * 5 + 0x52dce729;
+
+            k2 *= c2;
+            k2 = MurmurHash128Bit.rotl64(k2, 33);
+            k2 *= c1;
+            h2 ^= k2;
+
+            h2 = MurmurHash128Bit.rotl64(h2, 31);
+            h2 += h1;
+            h2 = h2 * 5 + 0x38495ab5;
+        }
+
+        //----------
+        // tail
+
+        // Advance offset to the unprocessed tail of the data.
+        offset += nblocks * 16;
+
+        long k1 = 0;
+        long k2 = 0;
+
+        switch (length & 15) {
+            case 15:
+                k2 ^= ((long) key.get(offset + 14)) << 48;
+            case 14:
+                k2 ^= ((long) key.get(offset + 13)) << 40;
+            case 13:
+                k2 ^= ((long) key.get(offset + 12)) << 32;
+            case 12:
+                k2 ^= ((long) key.get(offset + 11)) << 24;
+            case 11:
+                k2 ^= ((long) key.get(offset + 10)) << 16;
+            case 10:
+                k2 ^= ((long) key.get(offset + 9)) << 8;
+            case 9:
+                k2 ^= ((long) key.get(offset + 8)) << 0;
+                k2 *= c2;
+                k2 = MurmurHash128Bit.rotl64(k2, 33);
+                k2 *= c1;
+                h2 ^= k2;
+
+            case 8:
+                k1 ^= ((long) key.get(offset + 7)) << 56;
+            case 7:
+                k1 ^= ((long) key.get(offset + 6)) << 48;
+            case 6:
+                k1 ^= ((long) key.get(offset + 5)) << 40;
+            case 5:
+                k1 ^= ((long) key.get(offset + 4)) << 32;
+            case 4:
+                k1 ^= ((long) key.get(offset + 3)) << 24;
+            case 3:
+                k1 ^= ((long) key.get(offset + 2)) << 16;
+            case 2:
+                k1 ^= ((long) key.get(offset + 1)) << 8;
+            case 1:
+                k1 ^= ((long) key.get(offset));
+                k1 *= c1;
+                k1 = MurmurHash128Bit.rotl64(k1, 31);
+                k1 *= c2;
+                h1 ^= k1;
+        };
+
+        //----------
+        // finalization
+
+        h1 ^= length;
+        h2 ^= length;
+
+        h1 += h2;
+        h2 += h1;
+
+        h1 = MurmurHash128Bit.fmix(h1);
+        h2 = MurmurHash128Bit.fmix(h2);
+
+        h1 += h2;
+        h2 += h1;
+
+        return (new long[] { h1, h2 });
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/src/test/java/edu/uci/ics/hyracks/storage/am/bloomfilter/util/AbstractBloomFilterTest.java b/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/src/test/java/edu/uci/ics/hyracks/storage/am/bloomfilter/util/AbstractBloomFilterTest.java
new file mode 100644
index 0000000..9b857a6
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/src/test/java/edu/uci/ics/hyracks/storage/am/bloomfilter/util/AbstractBloomFilterTest.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.bloomfilter.util;
+
+import java.util.Random;
+import java.util.logging.Logger;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public abstract class AbstractBloomFilterTest {
+    protected final Logger LOGGER = Logger.getLogger(BloomFilterTestHarness.class.getName());
+
+    protected final BloomFilterTestHarness harness;
+
+    public AbstractBloomFilterTest() {
+        harness = new BloomFilterTestHarness();
+    }
+
+    public AbstractBloomFilterTest(int pageSize, int numPages, int maxOpenFiles, int hyracksFrameSize) {
+        harness = new BloomFilterTestHarness(pageSize, numPages, maxOpenFiles, hyracksFrameSize);
+    }
+
+    @Before
+    public void setUp() throws HyracksDataException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    public static String randomString(int length, Random random) {
+        char[] chars = "abcdefghijklmnopqrstuvwxyz".toCharArray();
+        StringBuilder strBuilder = new StringBuilder();
+        for (int i = 0; i < length; ++i) {
+            char c = chars[random.nextInt(chars.length)];
+            strBuilder.append(c);
+        }
+        return strBuilder.toString();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/src/test/java/edu/uci/ics/hyracks/storage/am/bloomfilter/util/BloomFilterTestHarness.java b/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/src/test/java/edu/uci/ics/hyracks/storage/am/bloomfilter/util/BloomFilterTestHarness.java
new file mode 100644
index 0000000..8fac122
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/src/test/java/edu/uci/ics/hyracks/storage/am/bloomfilter/util/BloomFilterTestHarness.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.bloomfilter.util;
+
+import java.io.File;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Random;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.test.support.TestUtils;
+
+public class BloomFilterTestHarness {
+
+    private static final long RANDOM_SEED = 50;
+
+    protected final int pageSize;
+    protected final int numPages;
+    protected final int maxOpenFiles;
+    protected final int hyracksFrameSize;
+
+    protected IHyracksTaskContext ctx;
+    protected IBufferCache bufferCache;
+    protected IFileMapProvider fileMapProvider;
+    protected FileReference file;
+
+    protected final Random rnd = new Random();
+    protected final SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
+    protected final String tmpDir = System.getProperty("java.io.tmpdir");
+    protected final String sep = System.getProperty("file.separator");
+    protected String fileName;
+
+    public BloomFilterTestHarness() {
+        this.pageSize = AccessMethodTestsConfig.BLOOM_FILTER_PAGE_SIZE;
+        this.numPages = AccessMethodTestsConfig.BLOOM_FILTER_NUM_PAGES;
+        this.maxOpenFiles = AccessMethodTestsConfig.BLOOM_FILTER_MAX_OPEN_FILES;
+        this.hyracksFrameSize = AccessMethodTestsConfig.BLOOM_FILTER_HYRACKS_FRAME_SIZE;
+    }
+
+    public BloomFilterTestHarness(int pageSize, int numPages, int maxOpenFiles, int hyracksFrameSize) {
+        this.pageSize = pageSize;
+        this.numPages = numPages;
+        this.maxOpenFiles = maxOpenFiles;
+        this.hyracksFrameSize = hyracksFrameSize;
+    }
+
+    public void setUp() throws HyracksDataException {
+        fileName = tmpDir + sep + simpleDateFormat.format(new Date());
+        ctx = TestUtils.create(getHyracksFrameSize());
+        TestStorageManagerComponentHolder.init(pageSize, numPages, maxOpenFiles);
+        bufferCache = TestStorageManagerComponentHolder.getBufferCache(ctx);
+        fileMapProvider = TestStorageManagerComponentHolder.getFileMapProvider(ctx);
+        file = new FileReference(new File(fileName));
+        rnd.setSeed(RANDOM_SEED);
+    }
+
+    public void tearDown() throws HyracksDataException {
+        bufferCache.close();
+        file.delete();
+    }
+
+    public IHyracksTaskContext getHyracksTaskContext() {
+        return ctx;
+    }
+
+    public IBufferCache getBufferCache() {
+        return bufferCache;
+    }
+
+    public IFileMapProvider getFileMapProvider() {
+        return fileMapProvider;
+    }
+
+    public FileReference getFileReference() {
+        return file;
+    }
+
+    public String getFileName() {
+        return fileName;
+    }
+
+    public Random getRandom() {
+        return rnd;
+    }
+
+    public int getPageSize() {
+        return pageSize;
+    }
+
+    public int getNumPages() {
+        return numPages;
+    }
+
+    public int getHyracksFrameSize() {
+        return hyracksFrameSize;
+    }
+
+    public int getMaxOpenFiles() {
+        return maxOpenFiles;
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/pom.xml b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/pom.xml
index 880cba5..bfb2d61 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/pom.xml
@@ -1,14 +1,12 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-am-btree-test</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-am-btree-test</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-tests</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -36,14 +34,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>test</scope>
   	</dependency>
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeBulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeBulkLoadTest.java
index 11c47c7..5417ca1 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeBulkLoadTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeBulkLoadTest.java
@@ -22,21 +22,18 @@
 
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexBulkLoadTest;
-import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestContext;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestHarness;
 
-@SuppressWarnings("rawtypes")
 public class BTreeBulkLoadTest extends OrderedIndexBulkLoadTest {
 
+    private final BTreeTestHarness harness = new BTreeTestHarness();
+
     public BTreeBulkLoadTest() {
         super(BTreeTestHarness.LEAF_FRAMES_TO_TEST, 1);
     }
 
-    private final BTreeTestHarness harness = new BTreeTestHarness();
-
     @Before
     public void setUp() throws HyracksDataException {
         harness.setUp();
@@ -47,11 +44,12 @@
         harness.tearDown();
     }
 
+    @SuppressWarnings("rawtypes")
     @Override
     protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
             BTreeLeafFrameType leafType) throws Exception {
-        return BTreeTestContext.create(harness.getBufferCache(), harness.getBTreeFileId(), fieldSerdes, numKeys,
-                leafType);
+        return BTreeTestContext.create(harness.getBufferCache(), harness.getFileMapProvider(),
+                harness.getFileReference(), fieldSerdes, numKeys, leafType);
     }
 
     @Override
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeDeleteTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeDeleteTest.java
index 0205540..10cd59f 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeDeleteTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeDeleteTest.java
@@ -22,21 +22,18 @@
 
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexDeleteTest;
-import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestContext;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestHarness;
 
-@SuppressWarnings("rawtypes")
 public class BTreeDeleteTest extends OrderedIndexDeleteTest {
 
+    private final BTreeTestHarness harness = new BTreeTestHarness();
+
     public BTreeDeleteTest() {
         super(BTreeTestHarness.LEAF_FRAMES_TO_TEST);
     }
 
-    private final BTreeTestHarness harness = new BTreeTestHarness();
-
     @Before
     public void setUp() throws HyracksDataException {
         harness.setUp();
@@ -47,11 +44,12 @@
         harness.tearDown();
     }
 
+    @SuppressWarnings("rawtypes")
     @Override
     protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
             BTreeLeafFrameType leafType) throws Exception {
-        return BTreeTestContext.create(harness.getBufferCache(), harness.getBTreeFileId(), fieldSerdes, numKeys,
-                leafType);
+        return BTreeTestContext.create(harness.getBufferCache(), harness.getFileMapProvider(),
+                harness.getFileReference(), fieldSerdes, numKeys, leafType);
     }
 
     @Override
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeExamplesTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeExamplesTest.java
index f4f8b12f..c02d53d 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeExamplesTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeExamplesTest.java
@@ -21,7 +21,6 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexExamplesTest;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestHarness;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeUtils;
@@ -40,13 +39,11 @@
     public void tearDown() throws HyracksDataException {
         harness.tearDown();
     }
-    
-    protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories) throws TreeIndexException {
-        return BTreeUtils.createBTree(harness.getBufferCache(), harness.getOpCallback(), typeTraits, cmpFactories,
-                BTreeLeafFrameType.REGULAR_NSM);
+
+    protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories,
+            int[] bloomFilterKeyFields) throws TreeIndexException {
+        return BTreeUtils.createBTree(harness.getBufferCache(), harness.getFileMapProvider(), typeTraits, cmpFactories,
+                BTreeLeafFrameType.REGULAR_NSM, harness.getFileReference());
     }
-    
-    protected int getIndexFileId() {
-        return harness.getBTreeFileId();
-    }
+
 }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeInsertTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeInsertTest.java
index 0b6cf4d..efe7579 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeInsertTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeInsertTest.java
@@ -22,31 +22,27 @@
 
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexInsertTest;
-import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestContext;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestHarness;
 
 /**
- * Tests the BTree insert operation with strings and integer fields using
- * various numbers of key and payload fields.
- * 
- * Each tests first fills a BTree with randomly generated tuples. We compare the
- * following operations against expected results: 1. Point searches for all
- * tuples. 2. Ordered scan. 3. Disk-order scan. 4. Range search (and prefix
- * search for composite keys).
- * 
+ * Tests the BTree insert operation with strings and integer fields using 
+ * various numbers of key and payload fields. Each tests first fills a BTree with 
+ * randomly generated tuples. We compare the following operations against expected results: 
+ *      1) Point searches for all tuples 
+ *      2) Ordered scan
+ *      3) Disk-order scan
+ *      4) Range search (and prefix search for composite keys)
  */
-@SuppressWarnings("rawtypes")
 public class BTreeInsertTest extends OrderedIndexInsertTest {
 
+    private final BTreeTestHarness harness = new BTreeTestHarness();
+
     public BTreeInsertTest() {
         super(BTreeTestHarness.LEAF_FRAMES_TO_TEST);
     }
 
-    private final BTreeTestHarness harness = new BTreeTestHarness();
-
     @Before
     public void setUp() throws HyracksDataException {
         harness.setUp();
@@ -57,11 +53,12 @@
         harness.tearDown();
     }
 
+    @SuppressWarnings("rawtypes")
     @Override
     protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
             BTreeLeafFrameType leafType) throws Exception {
-        return BTreeTestContext.create(harness.getBufferCache(), harness.getBTreeFileId(), fieldSerdes, numKeys,
-                leafType);
+        return BTreeTestContext.create(harness.getBufferCache(), harness.getFileMapProvider(),
+                harness.getFileReference(), fieldSerdes, numKeys, leafType);
     }
 
     @Override
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeLifecycleTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeLifecycleTest.java
new file mode 100644
index 0000000..1445d2c
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeLifecycleTest.java
@@ -0,0 +1,71 @@
+package edu.uci.ics.hyracks.storage.am.btree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexLifecycleTest;
+import edu.uci.ics.hyracks.storage.am.common.CheckTuple;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.common.TreeIndexTestUtils;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
+
+public class BTreeLifecycleTest extends AbstractIndexLifecycleTest {
+    private final BTreeTestHarness harness = new BTreeTestHarness();
+    private final TreeIndexTestUtils titu = new OrderedIndexTestUtils();
+
+    @SuppressWarnings("rawtypes")
+    private final ISerializerDeserializer[] fieldSerdes = new ISerializerDeserializer[] { IntegerSerializerDeserializer.INSTANCE };
+
+    private ITreeIndexFrame frame = null;
+
+    @SuppressWarnings("rawtypes")
+    private IIndexTestContext<? extends CheckTuple> testCtx;
+
+    @Override
+    public void setup() throws Exception {
+        harness.setUp();
+        testCtx = BTreeTestContext.create(harness.getBufferCache(), harness.getFileMapProvider(),
+                harness.getFileReference(), fieldSerdes, fieldSerdes.length, BTreeLeafFrameType.REGULAR_NSM);
+        index = testCtx.getIndex();
+    }
+
+    @Override
+    public void tearDown() throws HyracksDataException {
+        testCtx.getIndex().deactivate();
+        testCtx.getIndex().destroy();
+        harness.tearDown();
+    }
+
+    @Override
+    protected boolean persistentStateExists() {
+        return harness.getFileReference().getFile().exists();
+    }
+
+    @Override
+    protected boolean isEmptyIndex() throws HyracksDataException {
+        BTree btree = (BTree) testCtx.getIndex();
+        if (frame == null) {
+            frame = btree.getInteriorFrameFactory().createFrame();
+        }
+        return btree.isEmptyTree(frame);
+    }
+
+    @Override
+    protected void performInsertions() throws Exception {
+        titu.insertIntTuples(testCtx, 10, harness.getRandom());
+    }
+
+    @Override
+    protected void checkInsertions() throws Exception {
+        titu.checkScan(testCtx);
+    }
+
+    @Override
+    protected void clearCheckableInsertions() throws Exception {
+        testCtx.getCheckTuples().clear();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeModificationOperationCallbackTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeModificationOperationCallbackTest.java
new file mode 100644
index 0000000..b5cbca3
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeModificationOperationCallbackTest.java
@@ -0,0 +1,35 @@
+package edu.uci.ics.hyracks.storage.am.btree;
+
+import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.btree.util.BTreeUtils;
+
+public class BTreeModificationOperationCallbackTest extends AbstractModificationOperationCallbackTest {
+    private final BTreeTestHarness harness;
+
+    public BTreeModificationOperationCallbackTest() {
+        harness = new BTreeTestHarness();
+    }
+
+    @Override
+    protected void createIndexInstance() throws Exception {
+        index = BTreeUtils.createBTree(harness.getBufferCache(), harness.getFileMapProvider(),
+                SerdeUtils.serdesToTypeTraits(keySerdes),
+                SerdeUtils.serdesToComparatorFactories(keySerdes, keySerdes.length), BTreeLeafFrameType.REGULAR_NSM,
+                harness.getFileReference());
+    }
+
+    @Override
+    public void setup() throws Exception {
+        harness.setUp();
+        super.setup();
+    }
+
+    @Override
+    public void tearDown() throws Exception {
+        super.tearDown();
+        harness.tearDown();
+    }
+
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeSearchCursorTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeSearchCursorTest.java
index 4003cf1..ad0b21e 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeSearchCursorTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeSearchCursorTest.java
@@ -24,6 +24,7 @@
 import java.util.TreeSet;
 import java.util.logging.Level;
 
+import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -47,29 +48,24 @@
 import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeRangeSearchCursor;
 import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
 import edu.uci.ics.hyracks.storage.am.btree.util.AbstractBTreeTest;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrame;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.freepage.LinkedListFreePageManager;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 
 public class BTreeSearchCursorTest extends AbstractBTreeTest {
-    // Declare fields
-    int fieldCount = 2;
-    ITypeTraits[] typeTraits = new ITypeTraits[fieldCount];
-
-    TypeAwareTupleWriterFactory tupleWriterFactory = new TypeAwareTupleWriterFactory(typeTraits);
-    ITreeIndexMetaDataFrameFactory metaFrameFactory = new LIFOMetaDataFrameFactory();
-    ITreeIndexMetaDataFrame metaFrame = metaFrameFactory.createFrame();
-
-    Random rnd = new Random(50);
+    private final int fieldCount = 2;
+    private final ITypeTraits[] typeTraits = new ITypeTraits[fieldCount];
+    private final TypeAwareTupleWriterFactory tupleWriterFactory = new TypeAwareTupleWriterFactory(typeTraits);
+    private final ITreeIndexMetaDataFrameFactory metaFrameFactory = new LIFOMetaDataFrameFactory();
+    private final Random rnd = new Random(50);
 
     @Before
     public void setUp() throws HyracksDataException {
@@ -85,8 +81,7 @@
         }
 
         IBufferCache bufferCache = harness.getBufferCache();
-        int btreeFileId = harness.getBTreeFileId();
-        
+
         // declare keys
         int keyFieldCount = 1;
         IBinaryComparatorFactory[] cmpFactories = new IBinaryComparatorFactory[keyFieldCount];
@@ -100,14 +95,16 @@
 
         IFreePageManager freePageManager = new LinkedListFreePageManager(bufferCache, 0, metaFrameFactory);
 
-        BTree btree = new BTree(bufferCache, NoOpOperationCallback.INSTANCE, fieldCount, cmpFactories, freePageManager, interiorFrameFactory, leafFrameFactory);
-        btree.create(btreeFileId);
-        btree.open(btreeFileId);
+        BTree btree = new BTree(bufferCache, harness.getFileMapProvider(), freePageManager, interiorFrameFactory,
+                leafFrameFactory, cmpFactories, fieldCount, harness.getFileReference());
+        btree.create();
+        btree.activate();
 
         ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
 
-        ITreeIndexAccessor indexAccessor = btree.createAccessor();
+        ITreeIndexAccessor indexAccessor = btree.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
 
         // generate keys
         int numKeys = 50;
@@ -136,18 +133,21 @@
             }
         }
 
-        // btree.printTree(leafFrame, interiorFrame, recDescSers);
-
         int minSearchKey = -100;
         int maxSearchKey = 100;
 
         // forward searches
-        performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true, true, false);
-        performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, false, true, false);
-        performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true, false, false);
-        performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true, true, false);
+        Assert.assertTrue(performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true,
+                true, false));
+        Assert.assertTrue(performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, false,
+                true, false));
+        Assert.assertTrue(performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true,
+                false, false));
+        Assert.assertTrue(performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true,
+                true, false));
 
-        btree.close();
+        btree.deactivate();
+        btree.destroy();
     }
 
     @Test
@@ -157,8 +157,7 @@
         }
 
         IBufferCache bufferCache = harness.getBufferCache();
-        int btreeFileId = harness.getBTreeFileId();
-        
+
         // declare keys
         int keyFieldCount = 2;
         IBinaryComparatorFactory[] cmpFactories = new IBinaryComparatorFactory[keyFieldCount];
@@ -173,14 +172,16 @@
 
         IFreePageManager freePageManager = new LinkedListFreePageManager(bufferCache, 0, metaFrameFactory);
 
-        BTree btree = new BTree(bufferCache, NoOpOperationCallback.INSTANCE, fieldCount, cmpFactories, freePageManager, interiorFrameFactory, leafFrameFactory);
-        btree.create(btreeFileId);
-        btree.open(btreeFileId);
+        BTree btree = new BTree(bufferCache, harness.getFileMapProvider(), freePageManager, interiorFrameFactory,
+                leafFrameFactory, cmpFactories, fieldCount, harness.getFileReference());
+        btree.create();
+        btree.activate();
 
         ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
 
-        ITreeIndexAccessor indexAccessor = btree.createAccessor();
+        ITreeIndexAccessor indexAccessor = btree.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
 
         // generate keys
         int numKeys = 50;
@@ -206,18 +207,21 @@
             }
         }
 
-        // btree.printTree(leafFrame, interiorFrame, recDescSers);
-
         int minSearchKey = -100;
         int maxSearchKey = 100;
 
         // forward searches
-        performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true, true, false);
-        performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, false, true, false);
-        performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true, false, false);
-        performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true, true, false);
+        Assert.assertTrue(performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true,
+                true, false));
+        Assert.assertTrue(performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, false,
+                true, false));
+        Assert.assertTrue(performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true,
+                false, false));
+        Assert.assertTrue(performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true,
+                true, false));
 
-        btree.close();
+        btree.deactivate();
+        btree.destroy();
     }
 
     @Test
@@ -227,8 +231,7 @@
         }
 
         IBufferCache bufferCache = harness.getBufferCache();
-        int btreeFileId = harness.getBTreeFileId();
-        
+
         // declare keys
         int keyFieldCount = 2;
         IBinaryComparatorFactory[] cmpFactories = new IBinaryComparatorFactory[keyFieldCount];
@@ -243,14 +246,16 @@
 
         IFreePageManager freePageManager = new LinkedListFreePageManager(bufferCache, 0, metaFrameFactory);
 
-        BTree btree = new BTree(bufferCache, NoOpOperationCallback.INSTANCE, fieldCount, cmpFactories, freePageManager, interiorFrameFactory, leafFrameFactory);
-        btree.create(btreeFileId);
-        btree.open(btreeFileId);
+        BTree btree = new BTree(bufferCache, harness.getFileMapProvider(), freePageManager, interiorFrameFactory,
+                leafFrameFactory, cmpFactories, fieldCount, harness.getFileReference());
+        btree.create();
+        btree.activate();
 
         ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
 
-        ITreeIndexAccessor indexAccessor = btree.createAccessor();
+        ITreeIndexAccessor indexAccessor = btree.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
 
         // generate keys
         int numKeys = 50;
@@ -276,22 +281,25 @@
             }
         }
 
-        // btree.printTree(leafFrame, interiorFrame, recDescSers);
-
         int minSearchKey = -100;
         int maxSearchKey = 100;
 
         // forward searches
-        performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true, true, false);
-        performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, false, true, false);
-        performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true, false, false);
-        performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true, true, false);
+        Assert.assertTrue(performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true,
+                true, false));
+        Assert.assertTrue(performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, false,
+                true, false));
+        Assert.assertTrue(performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true,
+                false, false));
+        Assert.assertTrue(performSearches(keys, btree, leafFrame, interiorFrame, minSearchKey, maxSearchKey, true,
+                true, false));
 
-        btree.close();
+        btree.deactivate();
+        btree.destroy();
     }
 
-    public RangePredicate createRangePredicate(int lk, int hk, boolean lowKeyInclusive,
-            boolean highKeyInclusive) throws HyracksDataException {
+    public RangePredicate createRangePredicate(int lk, int hk, boolean lowKeyInclusive, boolean highKeyInclusive)
+            throws HyracksDataException {
 
         // create tuplereferences for search keys
         ITupleReference lowKey = TupleUtils.createIntegerTuple(lk);
@@ -301,8 +309,8 @@
         searchCmps[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY).createBinaryComparator();
         MultiComparator searchCmp = new MultiComparator(searchCmps);
 
-        RangePredicate rangePred = new RangePredicate(lowKey, highKey, lowKeyInclusive, highKeyInclusive,
-                searchCmp, searchCmp);
+        RangePredicate rangePred = new RangePredicate(lowKey, highKey, lowKeyInclusive, highKeyInclusive, searchCmp,
+                searchCmp);
         return rangePred;
     }
 
@@ -345,9 +353,9 @@
                 int highKey = j;
 
                 ITreeIndexCursor rangeCursor = new BTreeRangeSearchCursor(leafFrame, false);
-                RangePredicate rangePred = createRangePredicate(lowKey, highKey, lowKeyInclusive,
-                        highKeyInclusive);
-                ITreeIndexAccessor indexAccessor = btree.createAccessor();
+                RangePredicate rangePred = createRangePredicate(lowKey, highKey, lowKeyInclusive, highKeyInclusive);
+                ITreeIndexAccessor indexAccessor = btree.createAccessor(TestOperationCallback.INSTANCE,
+                        TestOperationCallback.INSTANCE);
                 indexAccessor.search(rangeCursor, rangePred);
 
                 try {
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeSearchOperationCallbackTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeSearchOperationCallbackTest.java
new file mode 100644
index 0000000..037d992
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeSearchOperationCallbackTest.java
@@ -0,0 +1,35 @@
+package edu.uci.ics.hyracks.storage.am.btree;
+
+import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.btree.util.BTreeUtils;
+
+public class BTreeSearchOperationCallbackTest extends AbstractSearchOperationCallbackTest {
+    private final BTreeTestHarness harness;
+
+    public BTreeSearchOperationCallbackTest() {
+        harness = new BTreeTestHarness();
+    }
+
+    @Override
+    protected void createIndexInstance() throws Exception {
+        index = BTreeUtils.createBTree(harness.getBufferCache(), harness.getFileMapProvider(),
+                SerdeUtils.serdesToTypeTraits(keySerdes),
+                SerdeUtils.serdesToComparatorFactories(keySerdes, keySerdes.length), BTreeLeafFrameType.REGULAR_NSM,
+                harness.getFileReference());
+    }
+
+    @Override
+    public void setup() throws Exception {
+        harness.setUp();
+        super.setup();
+    }
+
+    @Override
+    public void tearDown() throws Exception {
+        super.tearDown();
+        harness.tearDown();
+    }
+
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeStatsTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeStatsTest.java
index c33b4e9..57535b2 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeStatsTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeStatsTest.java
@@ -1,7 +1,6 @@
 package edu.uci.ics.hyracks.storage.am.btree;
 
 import java.io.DataOutput;
-import java.io.File;
 import java.nio.ByteBuffer;
 import java.util.Random;
 import java.util.logging.Level;
@@ -14,7 +13,6 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
 import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
 import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
@@ -28,6 +26,7 @@
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMLeafFrameFactory;
 import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
 import edu.uci.ics.hyracks.storage.am.btree.util.AbstractBTreeTest;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
@@ -36,7 +35,6 @@
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
 import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.freepage.LinkedListFreePageManager;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
 import edu.uci.ics.hyracks.storage.am.common.util.TreeIndexBufferCacheWarmup;
 import edu.uci.ics.hyracks.storage.am.common.util.TreeIndexStats;
@@ -52,18 +50,15 @@
     private static final int NUM_PAGES = 1000;
     private static final int MAX_OPEN_FILES = 10;
     private static final int HYRACKS_FRAME_SIZE = 128;
-    private IHyracksTaskContext ctx = TestUtils.create(HYRACKS_FRAME_SIZE);
+
+    private final IHyracksTaskContext ctx = TestUtils.create(HYRACKS_FRAME_SIZE);
 
     @Test
     public void test01() throws Exception {
 
         TestStorageManagerComponentHolder.init(PAGE_SIZE, NUM_PAGES, MAX_OPEN_FILES);
-        IBufferCache bufferCache = TestStorageManagerComponentHolder.getBufferCache(ctx);
-        IFileMapProvider fmp = TestStorageManagerComponentHolder.getFileMapProvider(ctx);
-        FileReference file = new FileReference(new File(harness.getFileName()));
-        bufferCache.createFile(file);
-        int fileId = fmp.lookupFileId(file);
-        bufferCache.openFile(fileId);
+        IBufferCache bufferCache = harness.getBufferCache();
+        IFileMapProvider fmp = harness.getFileMapProvider();
 
         // declare fields
         int fieldCount = 2;
@@ -87,9 +82,10 @@
 
         IFreePageManager freePageManager = new LinkedListFreePageManager(bufferCache, 0, metaFrameFactory);
 
-        BTree btree = new BTree(bufferCache, NoOpOperationCallback.INSTANCE, fieldCount, cmpFactories, freePageManager, interiorFrameFactory, leafFrameFactory);
-        btree.create(fileId);
-        btree.open(fileId);
+        BTree btree = new BTree(bufferCache, fmp, freePageManager, interiorFrameFactory, leafFrameFactory,
+                cmpFactories, fieldCount, harness.getFileReference());
+        btree.create();
+        btree.activate();
 
         Random rnd = new Random();
         rnd.setSeed(50);
@@ -112,7 +108,8 @@
         accessor.reset(frame);
         FrameTupleReference tuple = new FrameTupleReference();
 
-        ITreeIndexAccessor indexAccessor = btree.createAccessor();
+        ITreeIndexAccessor indexAccessor = btree.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
         // 10000
         for (int i = 0; i < 100000; i++) {
 
@@ -145,6 +142,7 @@
             }
         }
 
+        int fileId = fmp.lookupFileId(harness.getFileReference());
         TreeIndexStatsGatherer statsGatherer = new TreeIndexStatsGatherer(bufferCache, freePageManager, fileId,
                 btree.getRootPageId());
         TreeIndexStats stats = statsGatherer.gatherStats(leafFrame, interiorFrame, metaFrame);
@@ -156,8 +154,8 @@
                 fileId);
         bufferCacheWarmup.warmup(leafFrame, metaFrame, new int[] { 1, 2 }, new int[] { 2, 5 });
 
-        btree.close();
-        bufferCache.closeFile(fileId);
+        btree.deactivate();
+        btree.destroy();
         bufferCache.close();
     }
 }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeUpdateSearchTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeUpdateSearchTest.java
index 2b03a6a..f01799d 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeUpdateSearchTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeUpdateSearchTest.java
@@ -22,6 +22,7 @@
 import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeRangeSearchCursor;
 import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
 import edu.uci.ics.hyracks.storage.am.btree.util.AbstractBTreeTest;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
@@ -30,19 +31,16 @@
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
 import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.freepage.LinkedListFreePageManager;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 
-@SuppressWarnings("rawtypes")
 public class BTreeUpdateSearchTest extends AbstractBTreeTest {
 
     // Update scan test on fixed-length tuples.
     @Test
     public void test01() throws Exception {
         IBufferCache bufferCache = harness.getBufferCache();
-        int btreeFileId = harness.getBTreeFileId();
-        
+
         // declare fields
         int fieldCount = 2;
         ITypeTraits[] typeTraits = new ITypeTraits[fieldCount];
@@ -54,6 +52,7 @@
         IBinaryComparatorFactory[] cmpFactories = new IBinaryComparatorFactory[keyFieldCount];
         cmpFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
 
+        @SuppressWarnings("rawtypes")
         ISerializerDeserializer[] recDescSers = { IntegerSerializerDeserializer.INSTANCE,
                 IntegerSerializerDeserializer.INSTANCE };
 
@@ -65,9 +64,10 @@
         IBTreeLeafFrame leafFrame = (IBTreeLeafFrame) leafFrameFactory.createFrame();
 
         IFreePageManager freePageManager = new LinkedListFreePageManager(bufferCache, 0, metaFrameFactory);
-        BTree btree = new BTree(bufferCache, NoOpOperationCallback.INSTANCE, fieldCount, cmpFactories, freePageManager, interiorFrameFactory, leafFrameFactory);
-        btree.create(btreeFileId);
-        btree.open(btreeFileId);
+        BTree btree = new BTree(bufferCache, harness.getFileMapProvider(), freePageManager, interiorFrameFactory,
+                leafFrameFactory, cmpFactories, fieldCount, harness.getFileReference());
+        btree.create();
+        btree.activate();
 
         Random rnd = new Random();
         rnd.setSeed(50);
@@ -80,7 +80,8 @@
 
         ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference insertTuple = new ArrayTupleReference();
-        ITreeIndexAccessor indexAccessor = btree.createAccessor();
+        ITreeIndexAccessor indexAccessor = btree.createAccessor(TestOperationCallback.INSTANCE,
+                TestOperationCallback.INSTANCE);
 
         int numInserts = 10000;
         for (int i = 0; i < numInserts; i++) {
@@ -149,6 +150,7 @@
         } finally {
             scanCursor.close();
         }
-        btree.close();
+        btree.deactivate();
+        btree.destroy();
     }
 }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeUpdateTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeUpdateTest.java
index c3b56d5..89bb50e 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeUpdateTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeUpdateTest.java
@@ -22,21 +22,18 @@
 
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
-import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexUpdateTest;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestContext;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestHarness;
 
-@SuppressWarnings("rawtypes")
 public class BTreeUpdateTest extends OrderedIndexUpdateTest {
 
+    private final BTreeTestHarness harness = new BTreeTestHarness();
+
     public BTreeUpdateTest() {
         super(BTreeTestHarness.LEAF_FRAMES_TO_TEST);
     }
 
-    private final BTreeTestHarness harness = new BTreeTestHarness();
-
     @Before
     public void setUp() throws HyracksDataException {
         harness.setUp();
@@ -47,11 +44,12 @@
         harness.tearDown();
     }
 
+    @SuppressWarnings("rawtypes")
     @Override
     protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
             BTreeLeafFrameType leafType) throws Exception {
-        return BTreeTestContext.create(harness.getBufferCache(), harness.getBTreeFileId(), fieldSerdes, numKeys,
-                leafType);
+        return BTreeTestContext.create(harness.getBufferCache(), harness.getFileMapProvider(),
+                harness.getFileReference(), fieldSerdes, numKeys, leafType);
     }
 
     @Override
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeUpsertTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeUpsertTest.java
index 6e14607..ab32156 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeUpsertTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeUpsertTest.java
@@ -27,16 +27,14 @@
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestHarness;
 
 /**
- * Tests the BTree insert operation with strings and integer fields using
- * various numbers of key and payload fields.
- * 
- * Each tests first fills a BTree with randomly generated tuples. We compare the
- * following operations against expected results: 1. Point searches for all
- * tuples. 2. Ordered scan. 3. Disk-order scan. 4. Range search (and prefix
- * search for composite keys).
- * 
+ * Tests the BTree insert operation with strings and integer fields using 
+ * various numbers of key and payload fields. Each tests first fills a BTree with 
+ * randomly generated tuples. We compare the following operations against expected results: 
+ *      1) Point searches for all tuples 
+ *      2) Ordered scan
+ *      3) Disk-order scan
+ *      4) Range search (and prefix search for composite keys)
  */
-@SuppressWarnings("rawtypes")
 public class BTreeUpsertTest extends OrderedIndexUpsertTest {
 
     public BTreeUpsertTest() {
@@ -55,11 +53,12 @@
         harness.tearDown();
     }
 
+    @SuppressWarnings("rawtypes")
     @Override
     protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
             BTreeLeafFrameType leafType) throws Exception {
-        return BTreeTestContext.create(harness.getBufferCache(), harness.getBTreeFileId(), fieldSerdes, numKeys,
-                leafType);
+        return BTreeTestContext.create(harness.getBufferCache(), harness.getFileMapProvider(),
+                harness.getFileReference(), fieldSerdes, numKeys, leafType);
     }
 
     @Override
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/FieldPrefixNSMTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/FieldPrefixNSMTest.java
index d61d16a..1bf511e 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/FieldPrefixNSMTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/FieldPrefixNSMTest.java
@@ -48,19 +48,19 @@
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
 import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
-@SuppressWarnings("rawtypes")
 public class FieldPrefixNSMTest extends AbstractBTreeTest {
 
-    private static final int PAGE_SIZE = 32768; // 32K
+    private static final int PAGE_SIZE = 32768;
     private static final int NUM_PAGES = 40;
     private static final int MAX_OPEN_FILES = 10;
     private static final int HYRACKS_FRAME_SIZE = 128;
 
-    public FieldPrefixNSMTest() {        
+    public FieldPrefixNSMTest() {
         super(PAGE_SIZE, NUM_PAGES, MAX_OPEN_FILES, HYRACKS_FRAME_SIZE);
     }
-    
+
     private ITupleReference createTuple(IHyracksTaskContext ctx, int f0, int f1, int f2, boolean print)
             throws HyracksDataException {
         if (print) {
@@ -73,7 +73,8 @@
         FrameTupleAppender appender = new FrameTupleAppender(ctx.getFrameSize());
         ArrayTupleBuilder tb = new ArrayTupleBuilder(3);
         DataOutput dos = tb.getDataOutput();
-        
+
+        @SuppressWarnings("rawtypes")
         ISerializerDeserializer[] recDescSers = { IntegerSerializerDeserializer.INSTANCE,
                 IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE };
         RecordDescriptor recDesc = new RecordDescriptor(recDescSers);
@@ -98,8 +99,8 @@
     }
 
     @Test
-    public void test01() throws Exception {        
-        
+    public void test01() throws Exception {
+
         // declare fields
         int fieldCount = 3;
         ITypeTraits[] typeTraits = new ITypeTraits[fieldCount];
@@ -116,6 +117,7 @@
         MultiComparator cmp = new MultiComparator(cmps);
 
         // just for printing
+        @SuppressWarnings("rawtypes")
         ISerializerDeserializer[] fieldSerdes = { IntegerSerializerDeserializer.INSTANCE,
                 IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE };
 
@@ -123,7 +125,10 @@
         rnd.setSeed(50);
 
         IBufferCache bufferCache = harness.getBufferCache();
-        int btreeFileId = harness.getBTreeFileId();
+        IFileMapProvider fileMapProvider = harness.getFileMapProvider();
+        bufferCache.createFile(harness.getFileReference());
+        int btreeFileId = fileMapProvider.lookupFileId(harness.getFileReference());
+        bufferCache.openFile(btreeFileId);
         IHyracksTaskContext ctx = harness.getHyracksTaskContext();
         ICachedPage page = bufferCache.pin(BufferedFileHandle.getDiskPageId(btreeFileId, 0), false);
         try {
@@ -220,6 +225,8 @@
 
         } finally {
             bufferCache.unpin(page);
+            bufferCache.closeFile(btreeFileId);
+            bufferCache.close();
         }
     }
 }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/StorageManagerTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/StorageManagerTest.java
index 9ec64b5..d273a12 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/StorageManagerTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/StorageManagerTest.java
@@ -29,7 +29,7 @@
 import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
 import edu.uci.ics.hyracks.storage.common.sync.LatchType;
 
-public class StorageManagerTest extends AbstractBTreeTest {	
+public class StorageManagerTest extends AbstractBTreeTest {
     public class PinnedLatchedPage {
         public final ICachedPage page;
         public final LatchType latch;
@@ -43,7 +43,10 @@
     }
 
     public enum FileAccessType {
-        FTA_READONLY, FTA_WRITEONLY, FTA_MIXED, FTA_UNLATCHED
+        FTA_READONLY,
+        FTA_WRITEONLY,
+        FTA_MIXED,
+        FTA_UNLATCHED
     }
 
     public class FileAccessWorker implements Runnable {
@@ -249,11 +252,16 @@
     }
 
     @Test
-    public void oneThreadOneFileTest() throws Exception { 
-		Thread worker = new Thread(new FileAccessWorker(0,
-				harness.getBufferCache(), FileAccessType.FTA_UNLATCHED,
-				harness.getBTreeFileId(), 10, 10, 100, 10, 0));
+    public void oneThreadOneFileTest() throws Exception {
+        IBufferCache bufferCache = harness.getBufferCache();
+        bufferCache.createFile(harness.getFileReference());
+        int btreeFileId = harness.getFileMapProvider().lookupFileId(harness.getFileReference());
+        bufferCache.openFile(btreeFileId);
+        Thread worker = new Thread(new FileAccessWorker(0, harness.getBufferCache(), FileAccessType.FTA_UNLATCHED,
+                btreeFileId, 10, 10, 100, 10, 0));
         worker.start();
         worker.join();
+        bufferCache.closeFile(btreeFileId);
+        bufferCache.close();
     }
 }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/multithread/BTreeMultiThreadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/multithread/BTreeMultiThreadTest.java
index 596fa31..3f38c05 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/multithread/BTreeMultiThreadTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/multithread/BTreeMultiThreadTest.java
@@ -24,18 +24,18 @@
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeTestHarness;
 import edu.uci.ics.hyracks.storage.am.btree.util.BTreeUtils;
-import edu.uci.ics.hyracks.storage.am.common.ITreeIndexTestWorkerFactory;
-import edu.uci.ics.hyracks.storage.am.common.TestWorkloadConf;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestWorkerFactory;
 import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.TestWorkloadConf;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.ProbabilityHelper;
 
 public class BTreeMultiThreadTest extends OrderedIndexMultiThreadTest {
 
-    private BTreeTestHarness harness = new BTreeTestHarness();
-    
-    private BTreeTestWorkerFactory workerFactory = new BTreeTestWorkerFactory();
-    
+    private final BTreeTestHarness harness = new BTreeTestHarness();
+    private final BTreeTestWorkerFactory workerFactory = new BTreeTestWorkerFactory();
+
     @Override
     protected void setUp() throws HyracksDataException {
         harness.setUp();
@@ -47,41 +47,45 @@
     }
 
     @Override
-    protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories) throws TreeIndexException {
-        return BTreeUtils.createBTree(harness.getBufferCache(), harness.getOpCallback(), typeTraits, cmpFactories, BTreeLeafFrameType.REGULAR_NSM);
+    protected ITreeIndex createIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories,
+            int[] bloomFilterKeyFields) throws TreeIndexException {
+        return BTreeUtils.createBTree(harness.getBufferCache(), harness.getFileMapProvider(), typeTraits, cmpFactories,
+                BTreeLeafFrameType.REGULAR_NSM, harness.getFileReference());
     }
 
     @Override
-    protected ITreeIndexTestWorkerFactory getWorkerFactory() {
+    protected IIndexTestWorkerFactory getWorkerFactory() {
         return workerFactory;
     }
 
     @Override
     protected ArrayList<TestWorkloadConf> getTestWorkloadConf() {
         ArrayList<TestWorkloadConf> workloadConfs = new ArrayList<TestWorkloadConf>();
-        
+
         // Insert only workload.
         TestOperation[] insertOnlyOps = new TestOperation[] { TestOperation.INSERT };
-        workloadConfs.add(new TestWorkloadConf(insertOnlyOps, getUniformOpProbs(insertOnlyOps)));
-        
-        // Inserts mixed with point searches and scans.
-        TestOperation[] insertSearchOnlyOps = new TestOperation[] { TestOperation.INSERT, TestOperation.POINT_SEARCH, TestOperation.SCAN, TestOperation.DISKORDER_SCAN };
-        workloadConfs.add(new TestWorkloadConf(insertSearchOnlyOps, getUniformOpProbs(insertSearchOnlyOps)));
-        
-        // Inserts, updates, deletes, and upserts.        
-        TestOperation[] insertDeleteUpdateUpsertOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE, TestOperation.UPDATE, TestOperation.UPSERT };
-        workloadConfs.add(new TestWorkloadConf(insertDeleteUpdateUpsertOps, getUniformOpProbs(insertDeleteUpdateUpsertOps)));
-        
-        // All operations mixed.
-        TestOperation[] allOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE, TestOperation.UPDATE, TestOperation.UPSERT, TestOperation.POINT_SEARCH, TestOperation.SCAN, TestOperation.DISKORDER_SCAN };
-        workloadConfs.add(new TestWorkloadConf(allOps, getUniformOpProbs(allOps)));
-        
-        return workloadConfs;
-    }
+        workloadConfs.add(new TestWorkloadConf(insertOnlyOps, ProbabilityHelper
+                .getUniformProbDist(insertOnlyOps.length)));
 
-    @Override
-    protected int getFileId() {
-        return harness.getBTreeFileId();
+        // Inserts mixed with point searches and scans.
+        TestOperation[] insertSearchOnlyOps = new TestOperation[] { TestOperation.INSERT, TestOperation.POINT_SEARCH,
+                TestOperation.SCAN, TestOperation.DISKORDER_SCAN };
+        workloadConfs.add(new TestWorkloadConf(insertSearchOnlyOps, ProbabilityHelper
+                .getUniformProbDist(insertSearchOnlyOps.length)));
+
+        // Inserts, updates, deletes, and upserts.        
+        TestOperation[] insertDeleteUpdateUpsertOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE,
+                TestOperation.UPDATE, TestOperation.UPSERT };
+        workloadConfs.add(new TestWorkloadConf(insertDeleteUpdateUpsertOps, ProbabilityHelper
+                .getUniformProbDist(insertDeleteUpdateUpsertOps.length)));
+
+        // All operations mixed.
+        TestOperation[] allOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE,
+                TestOperation.UPDATE, TestOperation.UPSERT, TestOperation.POINT_SEARCH, TestOperation.SCAN,
+                TestOperation.DISKORDER_SCAN };
+        workloadConfs.add(new TestWorkloadConf(allOps, ProbabilityHelper.getUniformProbDist(allOps.length)));
+
+        return workloadConfs;
     }
 
     @Override
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/multithread/BTreeTestWorker.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/multithread/BTreeTestWorker.java
index 7d8de7d..be8dc5d 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/multithread/BTreeTestWorker.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/multithread/BTreeTestWorker.java
@@ -24,37 +24,37 @@
 import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeNotUpdateableException;
 import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
 import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
-import edu.uci.ics.hyracks.storage.am.common.AbstractTreeIndexTestWorker;
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexTestWorker;
 import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector;
 import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
 import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
 
-public class BTreeTestWorker extends AbstractTreeIndexTestWorker {
-    
+public class BTreeTestWorker extends AbstractIndexTestWorker {
+
     private final BTree btree;
     private final int numKeyFields;
     private final ArrayTupleBuilder deleteTb;
     private final ArrayTupleReference deleteTuple = new ArrayTupleReference();
-    
-    public BTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, ITreeIndex index, int numBatches) {
+
+    public BTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches) {
         super(dataGen, opSelector, index, numBatches);
         btree = (BTree) index;
         numKeyFields = btree.getComparatorFactories().length;
         deleteTb = new ArrayTupleBuilder(numKeyFields);
     }
-    
+
     @Override
-    public void performOp(ITupleReference tuple, TestOperation op) throws HyracksDataException, TreeIndexException {        
+    public void performOp(ITupleReference tuple, TestOperation op) throws HyracksDataException, IndexException {
         BTree.BTreeAccessor accessor = (BTree.BTreeAccessor) indexAccessor;
         ITreeIndexCursor searchCursor = accessor.createSearchCursor();
         ITreeIndexCursor diskOrderScanCursor = accessor.createDiskOrderScanCursor();
         MultiComparator cmp = accessor.getOpContext().cmp;
         RangePredicate rangePred = new RangePredicate(tuple, tuple, true, true, cmp, cmp);
-        
+
         switch (op) {
             case INSERT:
                 try {
@@ -63,7 +63,7 @@
                     // Ignore duplicate keys, since we get random tuples.
                 }
                 break;
-                
+
             case DELETE:
                 // Create a tuple reference with only key fields.
                 deleteTb.reset();
@@ -77,7 +77,7 @@
                     // Ignore non-existant keys, since we get random tuples.
                 }
                 break;
-                
+
             case UPDATE:
                 try {
                     accessor.update(tuple);
@@ -87,21 +87,21 @@
                     // Ignore not updateable exception due to numKeys == numFields.
                 }
                 break;
-                
+
             case UPSERT:
                 accessor.upsert(tuple);
                 // Upsert should not throw. If it does, there's 
                 // a bigger problem and the test should fail.
                 break;
-                
-            case POINT_SEARCH: 
+
+            case POINT_SEARCH:
                 searchCursor.reset();
                 rangePred.setLowKey(tuple, true);
                 rangePred.setHighKey(tuple, true);
                 accessor.search(searchCursor, rangePred);
                 consumeCursorTuples(searchCursor);
                 break;
-                
+
             case SCAN:
                 searchCursor.reset();
                 rangePred.setLowKey(null, true);
@@ -109,21 +109,21 @@
                 accessor.search(searchCursor, rangePred);
                 consumeCursorTuples(searchCursor);
                 break;
-                
+
             case DISKORDER_SCAN:
                 diskOrderScanCursor.reset();
                 accessor.diskOrderScan(diskOrderScanCursor);
                 consumeCursorTuples(diskOrderScanCursor);
-                break;                            
-            
+                break;
+
             default:
                 throw new HyracksDataException("Op " + op.toString() + " not supported.");
         }
     }
-    
-    private void consumeCursorTuples(ITreeIndexCursor cursor) throws HyracksDataException {
+
+    private void consumeCursorTuples(ITreeIndexCursor cursor) throws HyracksDataException, IndexException {
         try {
-            while(cursor.hasNext()) {
+            while (cursor.hasNext()) {
                 cursor.next();
             }
         } finally {
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/multithread/BTreeTestWorkerFactory.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/multithread/BTreeTestWorkerFactory.java
index dc4d883..bfde531 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/multithread/BTreeTestWorkerFactory.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/multithread/BTreeTestWorkerFactory.java
@@ -15,16 +15,16 @@
 
 package edu.uci.ics.hyracks.storage.am.btree.multithread;
 
-import edu.uci.ics.hyracks.storage.am.common.AbstractTreeIndexTestWorker;
-import edu.uci.ics.hyracks.storage.am.common.ITreeIndexTestWorkerFactory;
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexTestWorker;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestWorkerFactory;
 import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
 
-public class BTreeTestWorkerFactory implements ITreeIndexTestWorkerFactory {
+public class BTreeTestWorkerFactory implements IIndexTestWorkerFactory {
     @Override
-    public AbstractTreeIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector,
-            ITreeIndex index, int numBatches) {
+    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector,
+            IIndex index, int numBatches) {
         return new BTreeTestWorker(dataGen, opSelector, index, numBatches);
     }
 }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/util/AbstractBTreeTest.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/util/AbstractBTreeTest.java
index f4eca1b..ef9a456 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/util/AbstractBTreeTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/util/AbstractBTreeTest.java
@@ -23,24 +23,25 @@
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 
 public abstract class AbstractBTreeTest {
-	protected final Logger LOGGER = Logger.getLogger(BTreeTestHarness.class.getName());
-	protected final BTreeTestHarness harness;
-	
-	public AbstractBTreeTest() {
-		harness = new BTreeTestHarness();
+    protected final Logger LOGGER = Logger.getLogger(BTreeTestHarness.class.getName());
+
+    protected final BTreeTestHarness harness;
+
+    public AbstractBTreeTest() {
+        harness = new BTreeTestHarness();
     }
-    
+
     public AbstractBTreeTest(int pageSize, int numPages, int maxOpenFiles, int hyracksFrameSize) {
-    	harness = new BTreeTestHarness(pageSize, numPages, maxOpenFiles, hyracksFrameSize);
+        harness = new BTreeTestHarness(pageSize, numPages, maxOpenFiles, hyracksFrameSize);
     }
-	
-	@Before
-	public void setUp() throws HyracksDataException {
-		harness.setUp();
+
+    @Before
+    public void setUp() throws HyracksDataException {
+        harness.setUp();
     }
-	
-	@After
+
+    @After
     public void tearDown() throws HyracksDataException {
-		harness.tearDown();
+        harness.tearDown();
     }
 }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/util/BTreeTestContext.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/util/BTreeTestContext.java
index b820f93..1d63b85 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/util/BTreeTestContext.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/util/BTreeTestContext.java
@@ -18,39 +18,40 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
 import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
 import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
 @SuppressWarnings("rawtypes")
 public class BTreeTestContext extends OrderedIndexTestContext {
-    
+
     public BTreeTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) {
         super(fieldSerdes, treeIndex);
     }
 
     @Override
     public int getKeyFieldCount() {
-        BTree btree = (BTree) treeIndex;
+        BTree btree = (BTree) index;
         return btree.getComparatorFactories().length;
     }
-    
+
     @Override
     public IBinaryComparatorFactory[] getComparatorFactories() {
-        BTree btree = (BTree) treeIndex;
+        BTree btree = (BTree) index;
         return btree.getComparatorFactories();
     }
-    
-    public static BTreeTestContext create(IBufferCache bufferCache, int btreeFileId, ISerializerDeserializer[] fieldSerdes, int numKeyFields, BTreeLeafFrameType leafType) throws Exception {        
+
+    public static BTreeTestContext create(IBufferCache bufferCache, IFileMapProvider fileMapProvider,
+            FileReference file, ISerializerDeserializer[] fieldSerdes, int numKeyFields, BTreeLeafFrameType leafType)
+            throws Exception {
         ITypeTraits[] typeTraits = SerdeUtils.serdesToTypeTraits(fieldSerdes);
         IBinaryComparatorFactory[] cmpFactories = SerdeUtils.serdesToComparatorFactories(fieldSerdes, numKeyFields);
-        BTree btree = BTreeUtils.createBTree(bufferCache, NoOpOperationCallback.INSTANCE, typeTraits, cmpFactories, leafType);
-        btree.create(btreeFileId);
-        btree.open(btreeFileId);
+        BTree btree = BTreeUtils.createBTree(bufferCache, fileMapProvider, typeTraits, cmpFactories, leafType, file);
         BTreeTestContext testCtx = new BTreeTestContext(fieldSerdes, btree);
         return testCtx;
     }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/util/BTreeTestHarness.java b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/util/BTreeTestHarness.java
index 1b450d8..e357bf5 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/util/BTreeTestHarness.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/btree/util/BTreeTestHarness.java
@@ -24,109 +24,100 @@
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallback;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
 import edu.uci.ics.hyracks.test.support.TestUtils;
 
-public class BTreeTestHarness {    
+public class BTreeTestHarness {
     public static final BTreeLeafFrameType[] LEAF_FRAMES_TO_TEST = new BTreeLeafFrameType[] {
-        BTreeLeafFrameType.REGULAR_NSM, BTreeLeafFrameType.FIELD_PREFIX_COMPRESSED_NSM };
-    
+            BTreeLeafFrameType.REGULAR_NSM, BTreeLeafFrameType.FIELD_PREFIX_COMPRESSED_NSM };
+
     private static final long RANDOM_SEED = 50;
-    private static final int DEFAULT_PAGE_SIZE = 256;
-    private static final int DEFAULT_NUM_PAGES = 100;
-    private static final int DEFAULT_MAX_OPEN_FILES = 10;
-    private static final int DEFAULT_HYRACKS_FRAME_SIZE = 128;
-    
+
     protected final int pageSize;
     protected final int numPages;
     protected final int maxOpenFiles;
     protected final int hyracksFrameSize;
-        
-    protected IHyracksTaskContext ctx; 
+
+    protected IHyracksTaskContext ctx;
     protected IBufferCache bufferCache;
-    protected int btreeFileId;
-    
+    protected IFileMapProvider fileMapProvider;
+    protected FileReference file;
+
     protected final Random rnd = new Random();
     protected final SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
     protected final String tmpDir = System.getProperty("java.io.tmpdir");
     protected final String sep = System.getProperty("file.separator");
     protected String fileName;
-    
+
     public BTreeTestHarness() {
-    	this.pageSize = DEFAULT_PAGE_SIZE;
-    	this.numPages = DEFAULT_NUM_PAGES;
-    	this.maxOpenFiles = DEFAULT_MAX_OPEN_FILES;
-    	this.hyracksFrameSize = DEFAULT_HYRACKS_FRAME_SIZE;
+        this.pageSize = AccessMethodTestsConfig.BTREE_PAGE_SIZE;
+        this.numPages = AccessMethodTestsConfig.BTREE_NUM_PAGES;
+        this.maxOpenFiles = AccessMethodTestsConfig.BTREE_MAX_OPEN_FILES;
+        this.hyracksFrameSize = AccessMethodTestsConfig.BTREE_HYRACKS_FRAME_SIZE;
     }
-    
+
     public BTreeTestHarness(int pageSize, int numPages, int maxOpenFiles, int hyracksFrameSize) {
-    	this.pageSize = pageSize;
-    	this.numPages = numPages;
-    	this.maxOpenFiles = maxOpenFiles;
-    	this.hyracksFrameSize = hyracksFrameSize;
+        this.pageSize = pageSize;
+        this.numPages = numPages;
+        this.maxOpenFiles = maxOpenFiles;
+        this.hyracksFrameSize = hyracksFrameSize;
     }
-    
+
     public void setUp() throws HyracksDataException {
         fileName = tmpDir + sep + simpleDateFormat.format(new Date());
         ctx = TestUtils.create(getHyracksFrameSize());
         TestStorageManagerComponentHolder.init(pageSize, numPages, maxOpenFiles);
         bufferCache = TestStorageManagerComponentHolder.getBufferCache(ctx);
-        IFileMapProvider fmp = TestStorageManagerComponentHolder.getFileMapProvider(ctx);
-        FileReference file = new FileReference(new File(fileName));
-        bufferCache.createFile(file);
-        btreeFileId = fmp.lookupFileId(file);
-        bufferCache.openFile(btreeFileId);
+        fileMapProvider = TestStorageManagerComponentHolder.getFileMapProvider(ctx);
+        file = new FileReference(new File(fileName));
         rnd.setSeed(RANDOM_SEED);
     }
-    
+
     public void tearDown() throws HyracksDataException {
-        bufferCache.closeFile(btreeFileId);
         bufferCache.close();
-        File f = new File(fileName);
-        f.deleteOnExit();
+        file.delete();
     }
-    
+
     public IHyracksTaskContext getHyracksTaskContext() {
-    	return ctx;
+        return ctx;
     }
-    
+
     public IBufferCache getBufferCache() {
-    	return bufferCache;
+        return bufferCache;
     }
-    
-    public int getBTreeFileId() {
-    	return btreeFileId;
+
+    public IFileMapProvider getFileMapProvider() {
+        return fileMapProvider;
     }
-    
+
+    public FileReference getFileReference() {
+        return file;
+    }
+
     public String getFileName() {
         return fileName;
     }
-    
+
     public Random getRandom() {
-    	return rnd;
+        return rnd;
     }
-    
+
     public int getPageSize() {
         return pageSize;
     }
-    
+
     public int getNumPages() {
         return numPages;
     }
-    
+
     public int getHyracksFrameSize() {
         return hyracksFrameSize;
     }
-    
+
     public int getMaxOpenFiles() {
         return maxOpenFiles;
     }
-    
-    public IOperationCallback getOpCallback() {
-        return NoOpOperationCallback.INSTANCE;
-    }
 }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/pom.xml b/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/pom.xml
deleted file mode 100644
index 5eda528..0000000
--- a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/pom.xml
+++ /dev/null
@@ -1,52 +0,0 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks</groupId>
-  <artifactId>hyracks-storage-am-invertedindex-test</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
-  <name>hyracks-storage-am-invertedindex-test</name>
-
-  <parent>
-    <groupId>edu.uci.ics.hyracks</groupId>
-    <artifactId>hyracks-tests</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
-  </parent>
-
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>2.0.2</version>
-        <configuration>
-          <source>1.7</source>
-          <target>1.7</target>
-          <encoding>UTF-8</encoding>
-          <fork>true</fork>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-  <dependencies>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-storage-am-invertedindex</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>compile</scope>
-  	</dependency>
-  	<dependency>
-  		<groupId>edu.uci.ics.hyracks</groupId>
-  		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>test</scope>
-  	</dependency>
-  	<dependency>
-  		<groupId>junit</groupId>
-  		<artifactId>junit</artifactId>
-  		<version>4.8.1</version>
-  		<type>jar</type>
-  		<scope>test</scope>
-  	</dependency>
-  </dependencies>
-</project>
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/AbstractInvIndexSearchTest.java b/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/AbstractInvIndexSearchTest.java
deleted file mode 100644
index e086af6..0000000
--- a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/AbstractInvIndexSearchTest.java
+++ /dev/null
@@ -1,193 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex;
-
-import java.io.File;
-import java.util.ArrayList;
-import java.util.Random;
-
-import org.junit.After;
-import org.junit.Before;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
-import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMInteriorFrameFactory;
-import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMLeafFrameFactory;
-import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
-import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrame;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
-import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
-import edu.uci.ics.hyracks.storage.am.common.freepage.LinkedListFreePageManager;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
-import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedListBuilder;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.FixedSizeElementInvertedListBuilder;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.InvertedIndex;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizer;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.ITokenFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.util.InvertedIndexUtils;
-import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
-import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
-import edu.uci.ics.hyracks.test.support.TestUtils;
-
-public abstract class AbstractInvIndexSearchTest extends AbstractInvIndexTest {
-    protected final int PAGE_SIZE = 32768;
-    protected final int NUM_PAGES = 100;
-    protected final int MAX_OPEN_FILES = 10;
-    protected final int HYRACKS_FRAME_SIZE = 32768;
-    protected IHyracksTaskContext taskCtx = TestUtils.create(HYRACKS_FRAME_SIZE);
-
-    protected IBufferCache bufferCache;
-    protected IFileMapProvider fmp;
-
-    // --- BTREE ---
-
-    // create file refs
-    protected FileReference btreeFile = new FileReference(new File(btreeFileName));
-    protected int btreeFileId;
-
-    // declare token type traits
-    protected ITypeTraits[] tokenTypeTraits = new ITypeTraits[] { UTF8StringPointable.TYPE_TRAITS };
-    protected ITypeTraits[] btreeTypeTraits = InvertedIndexUtils.getBTreeTypeTraits(tokenTypeTraits);
-
-    // declare btree keys
-    protected int btreeKeyFieldCount = 1;
-    protected IBinaryComparatorFactory[] btreeCmpFactories = new IBinaryComparatorFactory[btreeKeyFieldCount];
-
-    // btree frame factories
-    protected TypeAwareTupleWriterFactory tupleWriterFactory = new TypeAwareTupleWriterFactory(btreeTypeTraits);
-    protected ITreeIndexFrameFactory leafFrameFactory = new BTreeNSMLeafFrameFactory(tupleWriterFactory);
-    protected ITreeIndexFrameFactory interiorFrameFactory = new BTreeNSMInteriorFrameFactory(tupleWriterFactory);
-    protected ITreeIndexMetaDataFrameFactory metaFrameFactory = new LIFOMetaDataFrameFactory();
-
-    // btree frames
-    protected ITreeIndexFrame leafFrame = leafFrameFactory.createFrame();
-    protected ITreeIndexMetaDataFrame metaFrame = metaFrameFactory.createFrame();
-
-    protected IFreePageManager freePageManager;
-
-    protected BTree btree;
-
-    // --- INVERTED INDEX ---
-
-    protected FileReference invListsFile = new FileReference(new File(invListsFileName));
-    protected int invListsFileId;
-
-    protected int invListFields = 1;
-    protected ITypeTraits[] invListTypeTraits = new ITypeTraits[invListFields];
-
-    protected int invListKeys = 1;
-    protected IBinaryComparatorFactory[] invListCmpFactories = new IBinaryComparatorFactory[invListKeys];
-
-    protected InvertedIndex invIndex;
-
-    protected Random rnd = new Random();
-
-    protected ArrayTupleBuilder tb = new ArrayTupleBuilder(2);
-    protected ArrayTupleReference tuple = new ArrayTupleReference();
-
-    protected ISerializerDeserializer[] insertSerde = { UTF8StringSerializerDeserializer.INSTANCE,
-            IntegerSerializerDeserializer.INSTANCE };
-    protected RecordDescriptor insertRecDesc = new RecordDescriptor(insertSerde);
-
-    protected ArrayList<ArrayList<Integer>> checkInvLists = new ArrayList<ArrayList<Integer>>();
-
-    protected int maxId = 1000000;
-    protected int[] scanCountArray = new int[maxId];
-    protected ArrayList<Integer> expectedResults = new ArrayList<Integer>();
-
-    protected ISerializerDeserializer[] querySerde = { UTF8StringSerializerDeserializer.INSTANCE };
-    protected RecordDescriptor queryRecDesc = new RecordDescriptor(querySerde);
-
-    protected ArrayTupleBuilder queryTb = new ArrayTupleBuilder(querySerde.length);
-    protected ArrayTupleReference queryTuple = new ArrayTupleReference();
-
-    protected ITokenFactory tokenFactory;
-    protected IBinaryTokenizer tokenizer;
-
-    protected IIndexCursor resultCursor;
-
-    protected abstract void setTokenizer();
-    
-    /**
-     * Initialize members, generate data, and bulk load the inverted index.
-     */
-    @Before
-    public void start() throws Exception {
-        TestStorageManagerComponentHolder.init(PAGE_SIZE, NUM_PAGES, MAX_OPEN_FILES);
-        bufferCache = TestStorageManagerComponentHolder.getBufferCache(taskCtx);
-        fmp = TestStorageManagerComponentHolder.getFileMapProvider(taskCtx);
-
-        // --- BTREE ---
-
-        bufferCache.createFile(btreeFile);
-        btreeFileId = fmp.lookupFileId(btreeFile);
-        bufferCache.openFile(btreeFileId);
-
-        btreeCmpFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
-
-        freePageManager = new LinkedListFreePageManager(bufferCache, 0, metaFrameFactory);
-
-        btree = new BTree(bufferCache, NoOpOperationCallback.INSTANCE, btreeTypeTraits.length, btreeCmpFactories,
-                freePageManager, interiorFrameFactory, leafFrameFactory);
-        btree.create(btreeFileId);
-        btree.open(btreeFileId);
-
-        // --- INVERTED INDEX ---
-
-        setTokenizer();
-        
-        bufferCache.createFile(invListsFile);
-        invListsFileId = fmp.lookupFileId(invListsFile);
-        bufferCache.openFile(invListsFileId);
-
-        invListTypeTraits[0] = IntegerPointable.TYPE_TRAITS;
-        invListCmpFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
-
-        IInvertedListBuilder invListBuilder = new FixedSizeElementInvertedListBuilder(invListTypeTraits);
-        invIndex = new InvertedIndex(bufferCache, btree, invListTypeTraits, invListCmpFactories, invListBuilder);
-        invIndex.open(invListsFileId);
-
-        rnd.setSeed(50);
-    }
-
-    @After
-    public void deinit() throws HyracksDataException {
-        AbstractInvIndexTest.tearDown();
-        btree.close();
-        invIndex.close();
-        bufferCache.closeFile(btreeFileId);
-        bufferCache.closeFile(invListsFileId);
-        bufferCache.close();
-    }
-}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/AbstractInvIndexTest.java b/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/AbstractInvIndexTest.java
deleted file mode 100644
index cc8ab15..0000000
--- a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/AbstractInvIndexTest.java
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex;
-
-import java.io.File;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-import java.util.logging.Logger;
-
-public abstract class AbstractInvIndexTest {
-
-	protected static final Logger LOGGER = Logger
-			.getLogger(AbstractInvIndexTest.class.getName());
-
-	protected final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat(
-			"ddMMyy-hhmmssSS");
-	protected final static String tmpDir = System.getProperty("java.io.tmpdir");
-	protected final static String sep = System.getProperty("file.separator");
-	protected final static String baseFileName = tmpDir + sep
-			+ simpleDateFormat.format(new Date());
-	protected final static String btreeFileName = baseFileName + "btree";
-	protected final static String invListsFileName = baseFileName + "invlists";
-
-	public static void tearDown() {
-		File btreeFile = new File(btreeFileName);
-		btreeFile.deleteOnExit();
-		File invListsFile = new File(invListsFileName);
-		invListsFile.deleteOnExit();
-	}
-}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/BulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/BulkLoadTest.java
deleted file mode 100644
index 9fdc1c4..0000000
--- a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/BulkLoadTest.java
+++ /dev/null
@@ -1,294 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex;
-
-import java.io.DataOutput;
-import java.io.File;
-import java.nio.ByteBuffer;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Random;
-
-import junit.framework.Assert;
-
-import org.junit.AfterClass;
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
-import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrame;
-import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMInteriorFrameFactory;
-import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMLeafFrameFactory;
-import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
-import edu.uci.ics.hyracks.storage.am.btree.impls.BTreeRangeSearchCursor;
-import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
-import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoadContext;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
-import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
-import edu.uci.ics.hyracks.storage.am.common.freepage.LinkedListFreePageManager;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
-import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedListBuilder;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedListCursor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.FixedSizeElementInvertedListBuilder;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.FixedSizeElementInvertedListCursor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.InvertedIndex;
-import edu.uci.ics.hyracks.storage.am.invertedindex.util.InvertedIndexUtils;
-import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
-import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
-import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
-import edu.uci.ics.hyracks.test.support.TestUtils;
-
-public class BulkLoadTest extends AbstractInvIndexTest {
-
-    private static final int PAGE_SIZE = 32768;
-    private static final int NUM_PAGES = 100;
-    private static final int MAX_OPEN_FILES = 10;
-    private static final int HYRACKS_FRAME_SIZE = 32768;
-    private IHyracksTaskContext stageletCtx = TestUtils.create(HYRACKS_FRAME_SIZE);
-
-    /**
-     * This test generates a list of <word-token, id> pairs which are pre-sorted
-     * on the token. Those pairs for the input to an inverted-index bulk load.
-     * The contents of the inverted lists are verified against the generated
-     * data.
-     */
-    @Test
-    public void singleFieldPayloadTest() throws Exception {
-
-        TestStorageManagerComponentHolder.init(PAGE_SIZE, NUM_PAGES, MAX_OPEN_FILES);
-        IBufferCache bufferCache = TestStorageManagerComponentHolder.getBufferCache(stageletCtx);
-        IFileMapProvider fmp = TestStorageManagerComponentHolder.getFileMapProvider(stageletCtx);
-
-        // create file refs
-        FileReference btreeFile = new FileReference(new File(btreeFileName));
-        bufferCache.createFile(btreeFile);
-        int btreeFileId = fmp.lookupFileId(btreeFile);
-        bufferCache.openFile(btreeFileId);
-
-        FileReference invListsFile = new FileReference(new File(invListsFileName));
-        bufferCache.createFile(invListsFile);
-        int invListsFileId = fmp.lookupFileId(invListsFile);
-        bufferCache.openFile(invListsFileId);
-
-        // Declare token type traits, and compute BTree type traits.
-        ITypeTraits[] tokenTypeTraits = new ITypeTraits[] { UTF8StringPointable.TYPE_TRAITS };
-        ITypeTraits[] btreeTypeTraits = InvertedIndexUtils.getBTreeTypeTraits(tokenTypeTraits);
-
-        // declare btree keys
-        int keyFieldCount = 1;
-        IBinaryComparatorFactory[] cmpFactories = new IBinaryComparatorFactory[keyFieldCount];
-        cmpFactories[0] = PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY);
-
-        TypeAwareTupleWriterFactory tupleWriterFactory = new TypeAwareTupleWriterFactory(btreeTypeTraits);
-        ITreeIndexFrameFactory leafFrameFactory = new BTreeNSMLeafFrameFactory(tupleWriterFactory);
-        ITreeIndexFrameFactory interiorFrameFactory = new BTreeNSMInteriorFrameFactory(tupleWriterFactory);
-        ITreeIndexMetaDataFrameFactory metaFrameFactory = new LIFOMetaDataFrameFactory();
-
-        ITreeIndexFrame leafFrame = leafFrameFactory.createFrame();
-
-        IFreePageManager freePageManager = new LinkedListFreePageManager(bufferCache, 0, metaFrameFactory);
-
-        BTree btree = new BTree(bufferCache, NoOpOperationCallback.INSTANCE, btreeTypeTraits.length, cmpFactories,
-                freePageManager, interiorFrameFactory, leafFrameFactory);
-        btree.create(btreeFileId);
-        btree.open(btreeFileId);
-
-        int invListFields = 1;
-        ITypeTraits[] invListTypeTraits = new ITypeTraits[invListFields];
-        invListTypeTraits[0] = IntegerPointable.TYPE_TRAITS;
-
-        int invListKeys = 1;
-        IBinaryComparatorFactory[] invListCmpFactories = new IBinaryComparatorFactory[invListKeys];
-        invListCmpFactories[0] = PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY);
-
-        IInvertedListBuilder invListBuilder = new FixedSizeElementInvertedListBuilder(invListTypeTraits);
-        InvertedIndex invIndex = new InvertedIndex(bufferCache, btree, invListTypeTraits, invListCmpFactories, invListBuilder);
-        invIndex.open(invListsFileId);
-
-        Random rnd = new Random();
-        rnd.setSeed(50);
-
-        ByteBuffer frame = stageletCtx.allocateFrame();
-        FrameTupleAppender appender = new FrameTupleAppender(stageletCtx.getFrameSize());
-        ArrayTupleBuilder tb = new ArrayTupleBuilder(2);
-        DataOutput dos = tb.getDataOutput();
-
-        ISerializerDeserializer[] insertSerde = { UTF8StringSerializerDeserializer.INSTANCE,
-                IntegerSerializerDeserializer.INSTANCE };
-        RecordDescriptor insertRecDesc = new RecordDescriptor(insertSerde);
-        IFrameTupleAccessor accessor = new FrameTupleAccessor(stageletCtx.getFrameSize(), insertRecDesc);
-        accessor.reset(frame);
-        FrameTupleReference tuple = new FrameTupleReference();
-
-        List<String> tokens = new ArrayList<String>();
-        tokens.add("compilers");
-        tokens.add("computer");
-        tokens.add("databases");
-        tokens.add("fast");
-        tokens.add("hyracks");
-        tokens.add("major");
-        tokens.add("science");
-        tokens.add("systems");
-        tokens.add("university");
-
-        ArrayList<ArrayList<Integer>> checkListElements = new ArrayList<ArrayList<Integer>>();
-        for (int i = 0; i < tokens.size(); i++) {
-            checkListElements.add(new ArrayList<Integer>());
-        }
-
-        int maxId = 1000000;
-        int addProb = 0;
-        int addProbStep = 10;
-
-        IIndexBulkLoadContext ctx = invIndex.beginBulkLoad(BTree.DEFAULT_FILL_FACTOR);
-
-        for (int i = 0; i < tokens.size(); i++) {
-
-            addProb += addProbStep * (i + 1);
-            for (int j = 0; j < maxId; j++) {
-                if ((Math.abs(rnd.nextInt()) % addProb) == 0) {
-
-                    tb.reset();
-                    UTF8StringSerializerDeserializer.INSTANCE.serialize(tokens.get(i), dos);
-                    tb.addFieldEndOffset();
-                    IntegerSerializerDeserializer.INSTANCE.serialize(j, dos);
-                    tb.addFieldEndOffset();
-
-                    checkListElements.get(i).add(j);
-
-                    appender.reset(frame, true);
-                    appender.append(tb.getFieldEndOffsets(), tb.getByteArray(), 0, tb.getSize());
-
-                    tuple.reset(accessor, 0);
-
-                    try {
-                        invIndex.bulkLoadAddTuple(tuple, ctx);
-                    } catch (Exception e) {
-                        e.printStackTrace();
-                    }
-                }
-            }
-        }
-        invIndex.endBulkLoad(ctx);
-
-        // ------- START VERIFICATION -----------
-
-        ITreeIndexCursor btreeCursor = new BTreeRangeSearchCursor((IBTreeLeafFrame) leafFrame, false);
-        FrameTupleReference searchKey = new FrameTupleReference();
-        MultiComparator btreeCmp = MultiComparator.create(cmpFactories);
-        RangePredicate btreePred = new RangePredicate(searchKey, searchKey, true, true, btreeCmp, btreeCmp);
-
-        IInvertedListCursor invListCursor = new FixedSizeElementInvertedListCursor(bufferCache, invListsFileId,
-                invListTypeTraits);
-
-        ISerializerDeserializer[] tokenSerde = { UTF8StringSerializerDeserializer.INSTANCE };
-        RecordDescriptor tokenRecDesc = new RecordDescriptor(tokenSerde);
-        FrameTupleAppender tokenAppender = new FrameTupleAppender(stageletCtx.getFrameSize());
-        ArrayTupleBuilder tokenTupleBuilder = new ArrayTupleBuilder(1);
-        DataOutput tokenDos = tokenTupleBuilder.getDataOutput();
-        IFrameTupleAccessor tokenAccessor = new FrameTupleAccessor(stageletCtx.getFrameSize(), tokenRecDesc);
-        tokenAccessor.reset(frame);
-
-        ITreeIndexAccessor btreeAccessor = invIndex.getBTree().createAccessor();
-
-        // verify created inverted lists one-by-one
-        for (int i = 0; i < tokens.size(); i++) {
-
-            tokenTupleBuilder.reset();
-            UTF8StringSerializerDeserializer.INSTANCE.serialize(tokens.get(i), tokenDos);
-            tokenTupleBuilder.addFieldEndOffset();
-
-            tokenAppender.reset(frame, true);
-            tokenAppender.append(tokenTupleBuilder.getFieldEndOffsets(), tokenTupleBuilder.getByteArray(), 0,
-                    tokenTupleBuilder.getSize());
-
-            searchKey.reset(tokenAccessor, 0);
-
-            invIndex.openCursor(btreeCursor, btreePred, btreeAccessor, invListCursor);
-
-            invListCursor.pinPagesSync();
-            int checkIndex = 0;
-            while (invListCursor.hasNext()) {
-                invListCursor.next();
-                ITupleReference invListTuple = invListCursor.getTuple();
-                int invListElement = IntegerSerializerDeserializer.getInt(invListTuple.getFieldData(0),
-                        invListTuple.getFieldStart(0));
-                int checkInvListElement = checkListElements.get(i).get(checkIndex).intValue();
-                Assert.assertEquals(invListElement, checkInvListElement);
-                checkIndex++;
-            }
-            invListCursor.unpinPages();
-            Assert.assertEquals(checkIndex, checkListElements.get(i).size());
-        }
-
-        // check that non-existing tokens have an empty inverted list
-        List<String> nonExistingTokens = new ArrayList<String>();
-        nonExistingTokens.add("watermelon");
-        nonExistingTokens.add("avocado");
-        nonExistingTokens.add("lemon");
-
-        for (int i = 0; i < nonExistingTokens.size(); i++) {
-
-            tokenTupleBuilder.reset();
-            UTF8StringSerializerDeserializer.INSTANCE.serialize(nonExistingTokens.get(i), tokenDos);
-            tokenTupleBuilder.addFieldEndOffset();
-
-            tokenAppender.reset(frame, true);
-            tokenAppender.append(tokenTupleBuilder.getFieldEndOffsets(), tokenTupleBuilder.getByteArray(), 0,
-                    tokenTupleBuilder.getSize());
-
-            searchKey.reset(tokenAccessor, 0);
-
-            invIndex.openCursor(btreeCursor, btreePred, btreeAccessor, invListCursor);
-
-            invListCursor.pinPagesSync();
-            Assert.assertEquals(invListCursor.hasNext(), false);
-            invListCursor.unpinPages();
-        }
-
-        btree.close();
-        bufferCache.closeFile(btreeFileId);
-        bufferCache.closeFile(invListsFileId);
-        bufferCache.close();
-    }
-
-    @AfterClass
-    public static void deinit() {
-        AbstractInvIndexTest.tearDown();
-    }
-}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/FixedSizeFrameTupleTest.java b/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/FixedSizeFrameTupleTest.java
deleted file mode 100644
index 9c7ec09..0000000
--- a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/FixedSizeFrameTupleTest.java
+++ /dev/null
@@ -1,75 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex;
-
-import java.nio.ByteBuffer;
-import java.util.ArrayList;
-import java.util.Random;
-
-import junit.framework.Assert;
-
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
-import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.FixedSizeFrameTupleAccessor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.FixedSizeFrameTupleAppender;
-
-public class FixedSizeFrameTupleTest {
-
-    private static int FRAME_SIZE = 4096;
-
-    private Random rnd = new Random(50);
-
-    /**
-     * This test verifies the correct behavior of the FixedSizeFrameTuple class.
-     * Frames containing FixedSizeFrameTuple's require neither tuple slots nor
-     * field slots. The tests inserts generated data into a frame until the
-     * frame is full, and then verifies the frame's contents.
-     * 
-     */
-    @Test
-    public void singleFieldTest() throws Exception {
-        ByteBuffer buffer = ByteBuffer.allocate(FRAME_SIZE);
-
-        ITypeTraits[] fields = new ITypeTraits[1];
-        fields[0] = IntegerPointable.TYPE_TRAITS;
-
-        FixedSizeFrameTupleAppender ftapp = new FixedSizeFrameTupleAppender(FRAME_SIZE, fields);
-        FixedSizeFrameTupleAccessor ftacc = new FixedSizeFrameTupleAccessor(FRAME_SIZE, fields);
-
-        boolean frameHasSpace = true;
-
-        ArrayList<Integer> check = new ArrayList<Integer>();
-
-        ftapp.reset(buffer, true);
-        while (frameHasSpace) {
-            int val = rnd.nextInt();
-            frameHasSpace = ftapp.append(val);
-            if (frameHasSpace) {
-                check.add(val);
-                ftapp.incrementTupleCount(1);
-            }
-        }
-
-        ftacc.reset(buffer);
-        for (int i = 0; i < ftacc.getTupleCount(); i++) {
-            int val = IntegerSerializerDeserializer.getInt(ftacc.getBuffer().array(), ftacc.getTupleStartOffset(i));
-            Assert.assertEquals(check.get(i).intValue(), val);
-        }
-    }
-}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/NGramTokenizerTest.java b/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/NGramTokenizerTest.java
deleted file mode 100644
index 3fb6407..0000000
--- a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/NGramTokenizerTest.java
+++ /dev/null
@@ -1,237 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex;
-
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.DataInput;
-import java.io.DataInputStream;
-import java.io.DataOutput;
-import java.io.DataOutputStream;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.HashMap;
-
-import org.junit.Assert;
-import org.junit.Before;
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.data.std.util.GrowableArray;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.AbstractUTF8Token;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.HashedUTF8NGramTokenFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IToken;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.NGramUTF8StringBinaryTokenizer;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.UTF8NGramTokenFactory;
-
-public class NGramTokenizerTest {
-
-    private char PRECHAR = '#';
-    private char POSTCHAR = '$';
-
-    private String str = "Jürgen S. Generic's Car";
-    private byte[] inputBuffer;
-
-    private int gramLength = 3;
-
-    private void getExpectedGrams(String s, int gramLength, ArrayList<String> grams, boolean prePost) {
-
-        String tmp = s.toLowerCase();
-        if (prePost) {
-            StringBuilder preBuilder = new StringBuilder();
-            for (int i = 0; i < gramLength - 1; i++) {
-                preBuilder.append(PRECHAR);
-            }
-            String pre = preBuilder.toString();
-
-            StringBuilder postBuilder = new StringBuilder();
-            for (int i = 0; i < gramLength - 1; i++) {
-                postBuilder.append(POSTCHAR);
-            }
-            String post = postBuilder.toString();
-
-            tmp = pre + s.toLowerCase() + post;
-        }
-
-        for (int i = 0; i < tmp.length() - gramLength + 1; i++) {
-            String gram = tmp.substring(i, i + gramLength);
-            grams.add(gram);
-        }
-    }
-
-    @Before
-    public void init() throws Exception {
-        // serialize string into bytes
-        ByteArrayOutputStream baos = new ByteArrayOutputStream();
-        DataOutput dos = new DataOutputStream(baos);
-        dos.writeUTF(str);
-        inputBuffer = baos.toByteArray();
-    }
-
-    void runTestNGramTokenizerWithCountedHashedUTF8Tokens(boolean prePost) throws IOException {
-        HashedUTF8NGramTokenFactory tokenFactory = new HashedUTF8NGramTokenFactory();
-        NGramUTF8StringBinaryTokenizer tokenizer = new NGramUTF8StringBinaryTokenizer(gramLength, prePost, false,
-                false, tokenFactory);
-        tokenizer.reset(inputBuffer, 0, inputBuffer.length);
-
-        ArrayList<String> expectedGrams = new ArrayList<String>();
-        getExpectedGrams(str, gramLength, expectedGrams, prePost);
-        ArrayList<Integer> expectedHashedGrams = new ArrayList<Integer>();
-        HashMap<String, Integer> gramCounts = new HashMap<String, Integer>();
-        for (String s : expectedGrams) {
-            Integer count = gramCounts.get(s);
-            if (count == null) {
-                count = 1;
-                gramCounts.put(s, count);
-            } else {
-                count++;
-            }
-
-            int hash = tokenHash(s, count);
-            expectedHashedGrams.add(hash);
-        }
-
-        int tokenCount = 0;
-
-        while (tokenizer.hasNext()) {
-            tokenizer.next();
-
-            // serialize hashed token
-            GrowableArray tokenStorage = new GrowableArray();
-
-            IToken token = tokenizer.getToken();
-            token.serializeToken(tokenStorage);
-
-            // deserialize token
-            ByteArrayInputStream bais = new ByteArrayInputStream(tokenStorage.getByteArray());
-            DataInput in = new DataInputStream(bais);
-
-            Integer hashedGram = in.readInt();
-
-            // System.out.println(hashedGram);
-
-            Assert.assertEquals(expectedHashedGrams.get(tokenCount), hashedGram);
-
-            tokenCount++;
-        }
-        // System.out.println("---------");
-    }
-
-    void runTestNGramTokenizerWithHashedUTF8Tokens(boolean prePost) throws IOException {
-        HashedUTF8NGramTokenFactory tokenFactory = new HashedUTF8NGramTokenFactory();
-        NGramUTF8StringBinaryTokenizer tokenizer = new NGramUTF8StringBinaryTokenizer(gramLength, prePost, true, false,
-                tokenFactory);
-        tokenizer.reset(inputBuffer, 0, inputBuffer.length);
-
-        ArrayList<String> expectedGrams = new ArrayList<String>();
-        getExpectedGrams(str, gramLength, expectedGrams, prePost);
-        ArrayList<Integer> expectedHashedGrams = new ArrayList<Integer>();
-        for (String s : expectedGrams) {
-            int hash = tokenHash(s, 1);
-            expectedHashedGrams.add(hash);
-        }
-
-        int tokenCount = 0;
-
-        while (tokenizer.hasNext()) {
-            tokenizer.next();
-
-            // serialize hashed token
-            GrowableArray tokenStorage = new GrowableArray();
-
-            IToken token = tokenizer.getToken();
-            token.serializeToken(tokenStorage);
-
-            // deserialize token
-            ByteArrayInputStream bais = new ByteArrayInputStream(tokenStorage.getByteArray());
-            DataInput in = new DataInputStream(bais);
-
-            Integer hashedGram = in.readInt();
-
-            // System.out.println(hashedGram);
-
-            Assert.assertEquals(expectedHashedGrams.get(tokenCount), hashedGram);
-
-            tokenCount++;
-        }
-        // System.out.println("---------");
-    }
-
-    void runTestNGramTokenizerWithUTF8Tokens(boolean prePost) throws IOException {
-        UTF8NGramTokenFactory tokenFactory = new UTF8NGramTokenFactory();
-        NGramUTF8StringBinaryTokenizer tokenizer = new NGramUTF8StringBinaryTokenizer(gramLength, prePost, true, false,
-                tokenFactory);
-        tokenizer.reset(inputBuffer, 0, inputBuffer.length);
-
-        ArrayList<String> expectedGrams = new ArrayList<String>();
-        getExpectedGrams(str, gramLength, expectedGrams, prePost);
-
-        int tokenCount = 0;
-
-        while (tokenizer.hasNext()) {
-            tokenizer.next();
-
-            // serialize hashed token
-            GrowableArray tokenStorage = new GrowableArray();
-
-            IToken token = tokenizer.getToken();
-            token.serializeToken(tokenStorage);
-
-            // deserialize token
-            ByteArrayInputStream bais = new ByteArrayInputStream(tokenStorage.getByteArray());
-            DataInput in = new DataInputStream(bais);
-
-            String strGram = in.readUTF();
-
-            // System.out.println("\"" + strGram + "\"");
-
-            Assert.assertEquals(expectedGrams.get(tokenCount), strGram);
-
-            tokenCount++;
-        }
-        // System.out.println("---------");
-    }
-
-    @Test
-    public void testNGramTokenizerWithCountedHashedUTF8Tokens() throws Exception {
-        runTestNGramTokenizerWithCountedHashedUTF8Tokens(false);
-        runTestNGramTokenizerWithCountedHashedUTF8Tokens(true);
-    }
-
-    @Test
-    public void testNGramTokenizerWithHashedUTF8Tokens() throws Exception {
-        runTestNGramTokenizerWithHashedUTF8Tokens(false);
-        runTestNGramTokenizerWithHashedUTF8Tokens(true);
-    }
-
-    @Test
-    public void testNGramTokenizerWithUTF8Tokens() throws IOException {
-        runTestNGramTokenizerWithUTF8Tokens(false);
-        runTestNGramTokenizerWithUTF8Tokens(true);
-    }
-
-    public int tokenHash(String token, int tokenCount) {
-        int h = AbstractUTF8Token.GOLDEN_RATIO_32;
-        for (int i = 0; i < token.length(); i++) {
-            h ^= token.charAt(i);
-            h *= AbstractUTF8Token.GOLDEN_RATIO_32;
-        }
-        return h + tokenCount;
-    }
-}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/SearchPerfTest.java b/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/SearchPerfTest.java
deleted file mode 100644
index 33bf0c5..0000000
--- a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/SearchPerfTest.java
+++ /dev/null
@@ -1,303 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.logging.Level;
-
-import org.junit.Assert;
-import org.junit.Before;
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoadContext;
-import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifier;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.InvertedIndex.InvertedIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.InvertedIndexSearchPredicate;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.OccurrenceThresholdPanicException;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.TOccurrenceSearcher;
-import edu.uci.ics.hyracks.storage.am.invertedindex.searchmodifiers.ConjunctiveSearchModifier;
-import edu.uci.ics.hyracks.storage.am.invertedindex.searchmodifiers.JaccardSearchModifier;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.DelimitedUTF8StringBinaryTokenizer;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.UTF8WordTokenFactory;
-
-/**
- * The purpose of this test is to evaluate the performance of searches against
- * an inverted index. First, we generate random <token, id> pairs sorted on
- * token, which are bulk loaded into an inverted index. Next, we build random
- * queries from a list of predefined tokens in the index, and measure the
- * performance of executing them with different search modifiers. We test the
- * ConjunctiveSearchModifier and the JaccardSearchModifier.
- * 
- */
-public class SearchPerfTest extends AbstractInvIndexSearchTest {
-
-	protected List<String> tokens = new ArrayList<String>();
-
-	@Override
-	protected void setTokenizer() {
-		tokenFactory = new UTF8WordTokenFactory();
-		tokenizer = new DelimitedUTF8StringBinaryTokenizer(true, false,
-				tokenFactory);
-	}
-	
-	@Before
-	public void start() throws Exception {
-		super.start();
-		loadData();
-	}
-
-	public void loadData() throws HyracksDataException, TreeIndexException {
-		tokens.add("compilers");
-		tokens.add("computer");
-		tokens.add("databases");
-		tokens.add("fast");
-		tokens.add("hyracks");
-		tokens.add("major");
-		tokens.add("science");
-		tokens.add("systems");
-		tokens.add("university");
-
-		for (int i = 0; i < tokens.size(); i++) {
-			checkInvLists.add(new ArrayList<Integer>());
-		}
-
-		// for generating length-skewed inverted lists
-		int addProb = 0;
-		int addProbStep = 10;
-
-		IIndexBulkLoadContext ctx = invIndex.beginBulkLoad(BTree.DEFAULT_FILL_FACTOR);
-
-		for (int i = 0; i < tokens.size(); i++) {
-
-			addProb += addProbStep * (i + 1);
-			for (int j = 0; j < maxId; j++) {
-				if ((Math.abs(rnd.nextInt()) % addProb) == 0) {
-					tb.reset();
-					UTF8StringSerializerDeserializer.INSTANCE.serialize(
-							tokens.get(i), tb.getDataOutput());
-					tb.addFieldEndOffset();
-					IntegerSerializerDeserializer.INSTANCE.serialize(j, tb.getDataOutput());
-					tb.addFieldEndOffset();
-					tuple.reset(tb.getFieldEndOffsets(), tb.getByteArray());
-					checkInvLists.get(i).add(j);
-					try {
-						invIndex.bulkLoadAddTuple(tuple, ctx);
-					} catch (Exception e) {
-						e.printStackTrace();
-					}
-				}
-			}
-		}
-		invIndex.endBulkLoad(ctx);
-	}
-
-	/**
-	 * Determine the expected results with the ScanCount algorithm. The
-	 * ScanCount algorithm is very simple, so we can be confident the results
-	 * are correct.
-	 * 
-	 */
-	protected void fillExpectedResults(int[] queryTokenIndexes,
-			int numQueryTokens, int occurrenceThreshold) {
-		// reset scan count array
-		for (int i = 0; i < maxId; i++) {
-			scanCountArray[i] = 0;
-		}
-
-		// count occurrences
-		for (int i = 0; i < numQueryTokens; i++) {
-			ArrayList<Integer> list = checkInvLists.get(queryTokenIndexes[i]);
-			for (int j = 0; j < list.size(); j++) {
-				scanCountArray[list.get(j)]++;
-			}
-		}
-
-		// check threshold
-		expectedResults.clear();
-		for (int i = 0; i < maxId; i++) {
-			if (scanCountArray[i] >= occurrenceThreshold) {
-				expectedResults.add(i);
-			}
-		}
-	}
-
-	/**
-	 * Generates a specified number of queries. Each query consists of a set of
-	 * randomly chosen tokens that are picked from the pre-defined set of
-	 * tokens. We run each query, measure it's time, and verify it's results
-	 * against the results produced by ScanCount, implemented in
-	 * fillExpectedResults().
-	 * 
-	 */
-	private void runQueries(IInvertedIndexSearchModifier searchModifier,
-			int numQueries) throws Exception {
-
-		rnd.setSeed(50);
-
-		InvertedIndexAccessor accessor = (InvertedIndexAccessor) invIndex.createAccessor();
-		InvertedIndexSearchPredicate searchPred = new InvertedIndexSearchPredicate(tokenizer, searchModifier);
-		
-		// generate random queries
-		int[] queryTokenIndexes = new int[tokens.size()];
-		for (int i = 0; i < numQueries; i++) {
-
-			int numQueryTokens = Math.abs(rnd.nextInt() % tokens.size()) + 1;
-			for (int j = 0; j < numQueryTokens; j++) {
-				queryTokenIndexes[j] = Math.abs(rnd.nextInt() % tokens.size());
-			}
-
-			StringBuilder strBuilder = new StringBuilder();
-			for (int j = 0; j < numQueryTokens; j++) {
-				strBuilder.append(tokens.get(queryTokenIndexes[j]));
-				if (j + 1 != numQueryTokens) {
-					strBuilder.append(" ");
-				}
-			}
-
-			String queryString = strBuilder.toString();
-
-			// Serialize query.
-			queryTb.reset();
-			UTF8StringSerializerDeserializer.INSTANCE.serialize(queryString,
-					queryTb.getDataOutput());
-			queryTb.addFieldEndOffset();
-			queryTuple.reset(queryTb.getFieldEndOffsets(), queryTb.getByteArray());
-
-			// Set query tuple in search predicate.
-			searchPred.setQueryTuple(queryTuple);
-			searchPred.setQueryFieldIndex(0);
-			
-			boolean panic = false;
-
-			resultCursor = accessor.createSearchCursor();
-			int repeats = 1;
-			double totalTime = 0;
-			for (int j = 0; j < repeats; j++) {
-				long timeStart = System.currentTimeMillis();
-				try {
-					resultCursor.reset();
-					accessor.search(resultCursor, searchPred);
-				} catch (OccurrenceThresholdPanicException e) {
-					panic = true;
-				}
-				long timeEnd = System.currentTimeMillis();
-				totalTime += timeEnd - timeStart;
-			}
-			double avgTime = totalTime / (double) repeats;
-			if (LOGGER.isLoggable(Level.INFO)) {
-				LOGGER.info(i + ": " + "\"" + queryString + "\": " + avgTime
-						+ "ms");
-			}
-
-			if (!panic) {
-				TOccurrenceSearcher searcher = (TOccurrenceSearcher) accessor.getSearcher();
-				fillExpectedResults(queryTokenIndexes, numQueryTokens,
-						searcher.getOccurrenceThreshold());
-				// verify results
-				int checkIndex = 0;
-				while (resultCursor.hasNext()) {
-					resultCursor.next();
-					ITupleReference resultTuple = resultCursor.getTuple();
-					int id = IntegerSerializerDeserializer.getInt(
-							resultTuple.getFieldData(0),
-							resultTuple.getFieldStart(0));
-					Assert.assertEquals(expectedResults.get(checkIndex)
-							.intValue(), id);
-					checkIndex++;
-				}
-
-				if (expectedResults.size() != checkIndex) {
-					if (LOGGER.isLoggable(Level.INFO)) {
-						LOGGER.info("CHECKING");
-					}
-					StringBuilder expectedStrBuilder = new StringBuilder();
-					for (Integer x : expectedResults) {
-						expectedStrBuilder.append(x + " ");
-					}
-					if (LOGGER.isLoggable(Level.INFO)) {
-						LOGGER.info(expectedStrBuilder.toString());
-					}
-				}
-
-				Assert.assertEquals(expectedResults.size(), checkIndex);
-			}
-		}
-	}
-
-	/**
-	 * Runs 50 random conjunctive search queries to test the
-	 * ConjunctiveSearchModifier.
-	 * 
-	 */
-	@Test
-	public void conjunctiveKeywordQueryTest() throws Exception {
-		IInvertedIndexSearchModifier searchModifier = new ConjunctiveSearchModifier();
-		runQueries(searchModifier, 50);
-	}
-
-	/**
-	 * Runs 50 random jaccard-based search queries with thresholds 1.0, 0.9,
-	 * 0.8, 0.7, 0.6, 0.5. Tests the JaccardSearchModifier.
-	 * 
-	 */
-	@Test
-	public void jaccardKeywordQueryTest() throws Exception {
-		JaccardSearchModifier searchModifier = new JaccardSearchModifier(1.0f);
-
-		if (LOGGER.isLoggable(Level.INFO)) {
-			LOGGER.info("JACCARD: " + 1.0f);
-		}
-		searchModifier.setJaccThresh(1.0f);
-		runQueries(searchModifier, 50);
-
-		if (LOGGER.isLoggable(Level.INFO)) {
-			LOGGER.info("JACCARD: " + 0.9f);
-		}
-		searchModifier.setJaccThresh(0.9f);
-		runQueries(searchModifier, 50);
-
-		if (LOGGER.isLoggable(Level.INFO)) {
-			LOGGER.info("JACCARD: " + 0.8f);
-		}
-		searchModifier.setJaccThresh(0.8f);
-		runQueries(searchModifier, 50);
-
-		if (LOGGER.isLoggable(Level.INFO)) {
-			LOGGER.info("JACCARD: " + 0.7f);
-		}
-		searchModifier.setJaccThresh(0.7f);
-		runQueries(searchModifier, 50);
-
-		if (LOGGER.isLoggable(Level.INFO)) {
-			LOGGER.info("JACCARD: " + 0.6f);
-		}
-		searchModifier.setJaccThresh(0.6f);
-		runQueries(searchModifier, 50);
-
-		if (LOGGER.isLoggable(Level.INFO)) {
-			LOGGER.info("JACCARD: " + 0.5f);
-		}
-		searchModifier.setJaccThresh(0.5f);
-		runQueries(searchModifier, 50);
-	}
-}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/SearchTest.java b/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/SearchTest.java
deleted file mode 100644
index 47a068b..0000000
--- a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/SearchTest.java
+++ /dev/null
@@ -1,308 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex;
-
-import java.io.DataOutputStream;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-import java.util.logging.Level;
-
-import org.junit.Before;
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
-import edu.uci.ics.hyracks.data.std.util.ByteArrayAccessibleOutputStream;
-import edu.uci.ics.hyracks.data.std.util.GrowableArray;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
-import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
-import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoadContext;
-import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
-import edu.uci.ics.hyracks.storage.am.invertedindex.api.IInvertedIndexSearchModifier;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.InvertedIndex.InvertedIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.InvertedIndexSearchPredicate;
-import edu.uci.ics.hyracks.storage.am.invertedindex.impls.OccurrenceThresholdPanicException;
-import edu.uci.ics.hyracks.storage.am.invertedindex.searchmodifiers.ConjunctiveSearchModifier;
-import edu.uci.ics.hyracks.storage.am.invertedindex.searchmodifiers.EditDistanceSearchModifier;
-import edu.uci.ics.hyracks.storage.am.invertedindex.searchmodifiers.JaccardSearchModifier;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IToken;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.NGramUTF8StringBinaryTokenizer;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.UTF8NGramTokenFactory;
-
-public class SearchTest extends AbstractInvIndexSearchTest {
-
-	protected List<String> dataStrings = new ArrayList<String>();
-	protected List<String> firstNames = new ArrayList<String>();
-	protected List<String> lastNames = new ArrayList<String>();
-
-	protected IBinaryComparator[] btreeBinCmps;
-	
-	@Override
-	protected void setTokenizer() {
-		tokenFactory = new UTF8NGramTokenFactory();
-		tokenizer = new NGramUTF8StringBinaryTokenizer(3, false, true, false,
-				tokenFactory);
-	}
-	
-	@Before
-	public void start() throws Exception {
-		super.start();
-		btreeBinCmps = new IBinaryComparator[btreeCmpFactories.length];
-		for (int i = 0; i < btreeCmpFactories.length; i++) {
-			btreeBinCmps[i] = btreeCmpFactories[i].createBinaryComparator();
-		}
-		generateDataStrings();
-		loadData();
-	}
-
-	public void generateDataStrings() {
-		firstNames.add("Kathrin");
-		firstNames.add("Cathrin");
-		firstNames.add("Kathryn");
-		firstNames.add("Cathryn");
-		firstNames.add("Kathrine");
-		firstNames.add("Cathrine");
-		firstNames.add("Kathryne");
-		firstNames.add("Cathryne");
-		firstNames.add("Katherin");
-		firstNames.add("Catherin");
-		firstNames.add("Katheryn");
-		firstNames.add("Catheryn");
-		firstNames.add("Katherine");
-		firstNames.add("Catherine");
-		firstNames.add("Katheryne");
-		firstNames.add("Catheryne");
-		firstNames.add("John");
-		firstNames.add("Jack");
-		firstNames.add("Jonathan");
-		firstNames.add("Nathan");
-
-		lastNames.add("Miller");
-		lastNames.add("Myller");
-		lastNames.add("Keller");
-		lastNames.add("Ketler");
-		lastNames.add("Muller");
-		lastNames.add("Fuller");
-		lastNames.add("Smith");
-		lastNames.add("Smyth");
-		lastNames.add("Smithe");
-		lastNames.add("Smythe");
-
-		// Generate all 'firstName lastName' combinations as data strings
-		for (String f : firstNames) {
-			for (String l : lastNames) {
-				dataStrings.add(f + " " + l);
-			}
-		}
-	}
-
-	private class TokenIdPair implements Comparable<TokenIdPair> {
-	    public final GrowableArray tokenStorage = new GrowableArray();
-		public int id;
-
-		TokenIdPair(IToken token, int id) throws IOException {
-			token.serializeToken(tokenStorage);
-			this.id = id;
-		}
-
-		@Override
-		public int compareTo(TokenIdPair o) {
-			int cmp = btreeBinCmps[0].compare(tokenStorage.getByteArray(), 0,
-			        tokenStorage.getByteArray().length, o.tokenStorage.getByteArray(), 0,
-					o.tokenStorage.getByteArray().length);
-			if (cmp == 0) {
-				return id - o.id;
-			} else {
-				return cmp;
-			}
-		}
-	}
-
-	public void loadData() throws IOException, TreeIndexException {
-		List<TokenIdPair> pairs = new ArrayList<TokenIdPair>();
-		// generate pairs for subsequent sorting and bulk-loading
-		int id = 0;
-		for (String s : dataStrings) {
-			ByteArrayAccessibleOutputStream baaos = new ByteArrayAccessibleOutputStream();
-			DataOutputStream dos = new DataOutputStream(baaos);
-			UTF8StringSerializerDeserializer.INSTANCE.serialize(s, dos);
-			tokenizer.reset(baaos.getByteArray(), 0, baaos.size());
-			while (tokenizer.hasNext()) {
-				tokenizer.next();
-				IToken token = tokenizer.getToken();
-				pairs.add(new TokenIdPair(token, id));
-			}
-			++id;
-		}
-		Collections.sort(pairs);
-
-		// bulk load index
-		IIndexBulkLoadContext ctx = invIndex.beginBulkLoad(BTree.DEFAULT_FILL_FACTOR);
-
-		for (TokenIdPair t : pairs) {
-			tb.reset();
-			tb.addField(t.tokenStorage.getByteArray(), 0,
-					t.tokenStorage.getByteArray().length);
-			IntegerSerializerDeserializer.INSTANCE.serialize(t.id, tb.getDataOutput());
-			tb.addFieldEndOffset();
-			tuple.reset(tb.getFieldEndOffsets(), tb.getByteArray());
-
-			try {
-				invIndex.bulkLoadAddTuple(tuple, ctx);
-			} catch (Exception e) {
-				e.printStackTrace();
-			}
-		}
-		invIndex.endBulkLoad(ctx);
-	}
-
-	/**
-	 * Runs a specified number of randomly picked strings from dataStrings as
-	 * queries. We run each query, measure it's time, and print it's results.
-	 * 
-	 */
-	private void runQueries(IInvertedIndexSearchModifier searchModifier,
-			int numQueries) throws Exception {
-
-		rnd.setSeed(50);
-
-		InvertedIndexAccessor accessor = (InvertedIndexAccessor) invIndex.createAccessor();
-		InvertedIndexSearchPredicate searchPred = new InvertedIndexSearchPredicate(tokenizer, searchModifier);
-		
-		for (int i = 0; i < numQueries; i++) {
-
-			int queryIndex = Math.abs(rnd.nextInt() % dataStrings.size());
-			String queryString = dataStrings.get(queryIndex);
-
-			// Serialize query.
-			queryTb.reset();
-			UTF8StringSerializerDeserializer.INSTANCE.serialize(queryString,
-					queryTb.getDataOutput());
-			queryTb.addFieldEndOffset();
-			queryTuple.reset(queryTb.getFieldEndOffsets(), queryTb.getByteArray());
-
-			// Set query tuple in search predicate.
-			searchPred.setQueryTuple(queryTuple);
-			searchPred.setQueryFieldIndex(0);
-			
-			resultCursor = accessor.createSearchCursor();
-			
-			int repeats = 1;
-			double totalTime = 0;
-			for (int j = 0; j < repeats; j++) {
-				long timeStart = System.currentTimeMillis();
-				try {
-					resultCursor.reset();
-					accessor.search(resultCursor, searchPred);
-				} catch (OccurrenceThresholdPanicException e) {
-					// ignore panic queries
-				}
-				long timeEnd = System.currentTimeMillis();
-				totalTime += timeEnd - timeStart;
-			}
-			double avgTime = totalTime / (double) repeats;
-			StringBuilder strBuilder = new StringBuilder();
-			strBuilder.append(i + ": " + "\"" + queryString + "\": " + avgTime
-					+ "ms" + "\n");
-			strBuilder.append("CANDIDATE RESULTS:\n");
-			while (resultCursor.hasNext()) {
-				resultCursor.next();
-				ITupleReference resultTuple = resultCursor.getTuple();
-				int id = IntegerSerializerDeserializer.getInt(
-						resultTuple.getFieldData(0),
-						resultTuple.getFieldStart(0));
-				strBuilder.append(id + " " + dataStrings.get(id));
-				strBuilder.append('\n');
-			}
-			// remove trailing newline
-			strBuilder.deleteCharAt(strBuilder.length() - 1);
-			if (LOGGER.isLoggable(Level.INFO)) {
-				LOGGER.info(strBuilder.toString());
-			}
-		}
-	}
-
-	/**
-	 * Runs 5 random conjunctive search queries to test the
-	 * ConjunctiveSearchModifier.
-	 * 
-	 */
-	@Test
-	public void conjunctiveQueryTest() throws Exception {
-		IInvertedIndexSearchModifier searchModifier = new ConjunctiveSearchModifier();
-		runQueries(searchModifier, 5);
-	}
-
-	/**
-	 * Runs 5 random jaccard-based search queries with thresholds 0.9, 0.8, 0.7.
-	 * Tests the JaccardSearchModifier.
-	 * 
-	 */
-	@Test
-	public void jaccardQueryTest() throws Exception {
-		JaccardSearchModifier searchModifier = new JaccardSearchModifier(1.0f);
-
-		if (LOGGER.isLoggable(Level.INFO)) {
-			LOGGER.info("JACCARD: " + 0.9f);
-		}
-		searchModifier.setJaccThresh(0.9f);
-		runQueries(searchModifier, 5);
-
-		if (LOGGER.isLoggable(Level.INFO)) {
-			LOGGER.info("JACCARD: " + 0.8f);
-		}
-		searchModifier.setJaccThresh(0.8f);
-		runQueries(searchModifier, 5);
-
-		if (LOGGER.isLoggable(Level.INFO)) {
-			LOGGER.info("JACCARD: " + 0.7f);
-		}
-		searchModifier.setJaccThresh(0.7f);
-		runQueries(searchModifier, 5);
-	}
-
-	/**
-	 * Runs 5 random edit-distance based search queries with thresholds 1, 2, 3.
-	 * Tests the EditDistanceSearchModifier.
-	 * 
-	 */
-	@Test
-	public void editDistanceQueryTest() throws Exception {
-		EditDistanceSearchModifier searchModifier = new EditDistanceSearchModifier(
-				3, 0);
-
-		if (LOGGER.isLoggable(Level.INFO)) {
-			LOGGER.info("EDIT DISTANCE: " + 1);
-		}
-		searchModifier.setEdThresh(1);
-		runQueries(searchModifier, 5);
-
-		if (LOGGER.isLoggable(Level.INFO)) {
-			LOGGER.info("EDIT DISTANCE: " + 2);
-		}
-		searchModifier.setEdThresh(2);
-		runQueries(searchModifier, 5);
-
-		if (LOGGER.isLoggable(Level.INFO)) {
-			LOGGER.info("EDIT DISTANCE: " + 3);
-		}
-		searchModifier.setEdThresh(3);
-		runQueries(searchModifier, 5);
-	}
-}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/WordTokenizerTest.java b/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/WordTokenizerTest.java
deleted file mode 100644
index 810c5f5..0000000
--- a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/WordTokenizerTest.java
+++ /dev/null
@@ -1,219 +0,0 @@
-/**
- * Copyright 2010-2011 The Regents of the University of California
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on
- * an "AS IS"; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under
- * the License.
- * 
- * Author: Alexander Behm <abehm (at) ics.uci.edu>
- */
-
-package edu.uci.ics.hyracks.storage.am.invertedindex;
-
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.DataInput;
-import java.io.DataInputStream;
-import java.io.DataOutput;
-import java.io.DataOutputStream;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.HashMap;
-
-import junit.framework.Assert;
-
-import org.junit.Before;
-import org.junit.Test;
-
-import edu.uci.ics.hyracks.data.std.util.GrowableArray;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.AbstractUTF8Token;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.DelimitedUTF8StringBinaryTokenizer;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.HashedUTF8WordTokenFactory;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IToken;
-import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.UTF8WordTokenFactory;
-
-public class WordTokenizerTest {
-
-    private String text = "Hello World, I would like to inform you of the importance of Foo Bar. Yes, Foo Bar. Jürgen.";
-    private byte[] inputBuffer;
-
-    private ArrayList<String> expectedUTF8Tokens = new ArrayList<String>();
-    private ArrayList<Integer> expectedHashedUTF8Tokens = new ArrayList<Integer>();
-    private ArrayList<Integer> expectedCountedHashedUTF8Tokens = new ArrayList<Integer>();
-
-    private boolean isSeparator(char c) {
-        return !(Character.isLetterOrDigit(c) || Character.getType(c) == Character.OTHER_LETTER || Character.getType(c) == Character.OTHER_NUMBER);
-    }
-    
-    private void tokenize(String text, ArrayList<String> tokens) {
-    	String lowerCaseText = text.toLowerCase();
-    	int startIx = 0;
-    	
-    	// Skip separators at beginning of string.
-    	while(isSeparator(lowerCaseText.charAt(startIx))) {
-    		startIx++;
-    	}
-    	while(startIx < lowerCaseText.length()) {
-    		while(startIx < lowerCaseText.length() && isSeparator(lowerCaseText.charAt(startIx))) {
-        	    startIx++;
-        	}
-    		int tokenStart = startIx;
-    		
-    		while(startIx < lowerCaseText.length() && !isSeparator(lowerCaseText.charAt(startIx))) {
-        	    startIx++;
-        	}
-    		int tokenEnd = startIx;
-    		
-    		// Emit token.
-    		String token = lowerCaseText.substring(tokenStart, tokenEnd);
-    		
-    		tokens.add(token);
-    	}
-    }
-    
-    @Before
-    public void init() throws IOException {
-        // serialize text into bytes
-        ByteArrayOutputStream baos = new ByteArrayOutputStream();
-        DataOutput dos = new DataOutputStream(baos);
-        dos.writeUTF(text);
-        inputBuffer = baos.toByteArray();
-        
-        // init expected string tokens
-        tokenize(text, expectedUTF8Tokens);
-        
-        // hashed tokens ignoring token count
-        for (int i = 0; i < expectedUTF8Tokens.size(); i++) {
-            int hash = tokenHash(expectedUTF8Tokens.get(i), 1);
-            expectedHashedUTF8Tokens.add(hash);
-        }
-
-        // hashed tokens using token count
-        HashMap<String, Integer> tokenCounts = new HashMap<String, Integer>();
-        for (int i = 0; i < expectedUTF8Tokens.size(); i++) {
-            Integer count = tokenCounts.get(expectedUTF8Tokens.get(i));
-            if (count == null) {
-                count = 1;
-                tokenCounts.put(expectedUTF8Tokens.get(i), count);
-            } else {
-                count++;
-            }
-
-            int hash = tokenHash(expectedUTF8Tokens.get(i), count);
-            expectedCountedHashedUTF8Tokens.add(hash);
-        }
-    }
-
-    @Test
-    public void testWordTokenizerWithCountedHashedUTF8Tokens() throws IOException {
-
-        HashedUTF8WordTokenFactory tokenFactory = new HashedUTF8WordTokenFactory();
-        DelimitedUTF8StringBinaryTokenizer tokenizer = new DelimitedUTF8StringBinaryTokenizer(false, false,
-                tokenFactory);
-
-        tokenizer.reset(inputBuffer, 0, inputBuffer.length);
-
-        int tokenCount = 0;
-
-        while (tokenizer.hasNext()) {
-            tokenizer.next();
-
-            // serialize token
-            GrowableArray tokenStorage = new GrowableArray();
-
-            IToken token = tokenizer.getToken();
-            token.serializeToken(tokenStorage);
-
-            // deserialize token
-            ByteArrayInputStream bais = new ByteArrayInputStream(tokenStorage.getByteArray());
-            DataInput in = new DataInputStream(bais);
-
-            Integer hashedToken = in.readInt();
-
-            Assert.assertEquals(hashedToken, expectedCountedHashedUTF8Tokens.get(tokenCount));
-
-            tokenCount++;
-        }
-    }
-
-    @Test
-    public void testWordTokenizerWithHashedUTF8Tokens() throws IOException {
-
-        HashedUTF8WordTokenFactory tokenFactory = new HashedUTF8WordTokenFactory();
-        DelimitedUTF8StringBinaryTokenizer tokenizer = new DelimitedUTF8StringBinaryTokenizer(true, false, tokenFactory);
-
-        tokenizer.reset(inputBuffer, 0, inputBuffer.length);
-
-        int tokenCount = 0;
-
-        while (tokenizer.hasNext()) {
-            tokenizer.next();
-
-            // serialize token
-            GrowableArray tokenStorage = new GrowableArray();
-
-            IToken token = tokenizer.getToken();
-            token.serializeToken(tokenStorage);
-
-            // deserialize token
-            ByteArrayInputStream bais = new ByteArrayInputStream(tokenStorage.getByteArray());
-            DataInput in = new DataInputStream(bais);
-
-            Integer hashedToken = in.readInt();
-
-            Assert.assertEquals(expectedHashedUTF8Tokens.get(tokenCount), hashedToken);
-
-            tokenCount++;
-        }
-    }
-
-    @Test
-    public void testWordTokenizerWithUTF8Tokens() throws IOException {
-
-        UTF8WordTokenFactory tokenFactory = new UTF8WordTokenFactory();
-        DelimitedUTF8StringBinaryTokenizer tokenizer = new DelimitedUTF8StringBinaryTokenizer(true, false, tokenFactory);
-
-        tokenizer.reset(inputBuffer, 0, inputBuffer.length);
-
-        int tokenCount = 0;
-
-        while (tokenizer.hasNext()) {
-            tokenizer.next();
-
-            // serialize hashed token
-            GrowableArray tokenStorage = new GrowableArray();
-
-            IToken token = tokenizer.getToken();
-            token.serializeToken(tokenStorage);
-
-            // deserialize token
-            ByteArrayInputStream bais = new ByteArrayInputStream(tokenStorage.getByteArray());
-            DataInput in = new DataInputStream(bais);
-
-            String strToken = in.readUTF();
-
-            Assert.assertEquals(expectedUTF8Tokens.get(tokenCount), strToken);
-
-            tokenCount++;
-        }
-    }
-
-    // JAQL Hash
-    public int tokenHash(String token, int tokenCount) {
-        int h = AbstractUTF8Token.GOLDEN_RATIO_32;
-        for (int i = 0; i < token.length(); i++) {
-        	h ^= token.charAt(i);
-            h *= AbstractUTF8Token.GOLDEN_RATIO_32;
-        }
-        return h + tokenCount;
-    }
-}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/pom.xml b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/pom.xml
new file mode 100644
index 0000000..f687212
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/pom.xml
@@ -0,0 +1,45 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <artifactId>hyracks-storage-am-lsm-btree-test</artifactId>
+
+  <parent>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks-tests</artifactId>
+    <version>0.2.5-SNAPSHOT</version>
+  </parent>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.0.2</version>
+        <configuration>
+          <source>1.7</source>
+          <target>1.7</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>  	
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-lsm-btree</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>  	
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-common</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-test-support</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<scope>compile</scope>
+  	</dependency>
+  </dependencies>
+</project>
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeBulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeBulkLoadTest.java
new file mode 100644
index 0000000..4bd1910
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeBulkLoadTest.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexBulkLoadTest;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestHarness;
+
+@SuppressWarnings("rawtypes")
+public class LSMBTreeBulkLoadTest extends OrderedIndexBulkLoadTest {
+
+    public LSMBTreeBulkLoadTest() {
+        super(LSMBTreeTestHarness.LEAF_FRAMES_TO_TEST, 1);
+    }
+
+    private final LSMBTreeTestHarness harness = new LSMBTreeTestHarness();
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
+            BTreeLeafFrameType leafType) throws Exception {
+        return LSMBTreeTestContext.create(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), fieldSerdes, numKeys, harness.getMergePolicy(),
+                harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeDeleteTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeDeleteTest.java
new file mode 100644
index 0000000..069faad
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeDeleteTest.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexDeleteTest;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestHarness;
+
+@SuppressWarnings("rawtypes")
+public class LSMBTreeDeleteTest extends OrderedIndexDeleteTest {
+
+    public LSMBTreeDeleteTest() {
+        super(LSMBTreeTestHarness.LEAF_FRAMES_TO_TEST);
+    }
+
+    private final LSMBTreeTestHarness harness = new LSMBTreeTestHarness();
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
+            BTreeLeafFrameType leafType) throws Exception {
+        return LSMBTreeTestContext.create(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), fieldSerdes, numKeys, harness.getMergePolicy(),
+                harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeExamplesTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeExamplesTest.java
new file mode 100644
index 0000000..539ed3e
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeExamplesTest.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexExamplesTest;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeUtils;
+
+public class LSMBTreeExamplesTest extends OrderedIndexExamplesTest {
+    private final LSMBTreeTestHarness harness = new LSMBTreeTestHarness();
+
+    @Override
+    protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories,
+            int[] bloomFilterKeyFields) throws TreeIndexException {
+        return LSMBTreeUtils.createLSMTree(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), typeTraits, cmpFactories, bloomFilterKeyFields,
+                harness.getMergePolicy(), harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeInsertTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeInsertTest.java
new file mode 100644
index 0000000..f17e3c8
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeInsertTest.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexInsertTest;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestHarness;
+
+@SuppressWarnings("rawtypes")
+public class LSMBTreeInsertTest extends OrderedIndexInsertTest {
+
+    public LSMBTreeInsertTest() {
+        super(LSMBTreeTestHarness.LEAF_FRAMES_TO_TEST);
+    }
+
+    private final LSMBTreeTestHarness harness = new LSMBTreeTestHarness();
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
+            BTreeLeafFrameType leafType) throws Exception {
+        return LSMBTreeTestContext.create(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), fieldSerdes, numKeys, harness.getMergePolicy(),
+                harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeLifecycleTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeLifecycleTest.java
new file mode 100644
index 0000000..24d1f10
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeLifecycleTest.java
@@ -0,0 +1,75 @@
+package edu.uci.ics.hyracks.storage.am.lsm.btree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestUtils;
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexLifecycleTest;
+import edu.uci.ics.hyracks.storage.am.common.CheckTuple;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.common.TreeIndexTestUtils;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.impls.LSMBTree;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestHarness;
+
+public class LSMBTreeLifecycleTest extends AbstractIndexLifecycleTest {
+
+    @SuppressWarnings("rawtypes")
+    private final ISerializerDeserializer[] fieldSerdes = new ISerializerDeserializer[] { IntegerSerializerDeserializer.INSTANCE };
+    private final LSMBTreeTestHarness harness = new LSMBTreeTestHarness();
+    private final TreeIndexTestUtils titu = new OrderedIndexTestUtils();
+
+    @SuppressWarnings("rawtypes")
+    private IIndexTestContext<? extends CheckTuple> testCtx;
+
+    @Override
+    protected boolean persistentStateExists() throws Exception {
+        // make sure all of the directories exist
+        for (IODeviceHandle handle : harness.getIOManager().getIODevices()) {
+            if (!new FileReference(handle, harness.getFileReference().getFile().getPath()).getFile().exists()) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    @Override
+    protected boolean isEmptyIndex() throws Exception {
+        return ((LSMBTree) index).isEmptyIndex();
+    }
+
+    @Override
+    public void setup() throws Exception {
+        harness.setUp();
+        testCtx = LSMBTreeTestContext.create(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), fieldSerdes, fieldSerdes.length, harness.getMergePolicy(),
+                harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+        index = testCtx.getIndex();
+    }
+
+    @Override
+    public void tearDown() throws Exception {
+        index.deactivate();
+        index.destroy();
+        harness.tearDown();
+    }
+
+    @Override
+    protected void performInsertions() throws Exception {
+        titu.insertIntTuples(testCtx, 10, harness.getRandom());
+    }
+
+    @Override
+    protected void checkInsertions() throws Exception {
+        titu.checkScan(testCtx);
+    }
+
+    @Override
+    protected void clearCheckableInsertions() throws Exception {
+        testCtx.getCheckTuples().clear();
+    }
+
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeMergeTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeMergeTest.java
new file mode 100644
index 0000000..da36c79
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeMergeTest.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestHarness;
+
+@SuppressWarnings("rawtypes")
+public class LSMBTreeMergeTest extends LSMBTreeMergeTestDriver {
+
+    public LSMBTreeMergeTest() {
+        super(LSMBTreeTestHarness.LEAF_FRAMES_TO_TEST);
+    }
+
+    private final LSMBTreeTestHarness harness = new LSMBTreeTestHarness();
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
+            BTreeLeafFrameType leafType) throws Exception {
+        return LSMBTreeTestContext.create(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), fieldSerdes, numKeys, harness.getMergePolicy(),
+                harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeMergeTestDriver.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeMergeTestDriver.java
new file mode 100644
index 0000000..8b02a8e
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeMergeTestDriver.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestDriver;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestUtils;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+
+@SuppressWarnings("rawtypes")
+public abstract class LSMBTreeMergeTestDriver extends OrderedIndexTestDriver {
+
+    private final OrderedIndexTestUtils orderedIndexTestUtils;
+
+    public LSMBTreeMergeTestDriver(BTreeLeafFrameType[] leafFrameTypesToTest) {
+        super(leafFrameTypesToTest);
+        this.orderedIndexTestUtils = new OrderedIndexTestUtils();
+    }
+
+    @Override
+    protected void runTest(ISerializerDeserializer[] fieldSerdes, int numKeys, BTreeLeafFrameType leafType,
+            ITupleReference lowKey, ITupleReference highKey, ITupleReference prefixLowKey, ITupleReference prefixHighKey)
+            throws Exception {
+        OrderedIndexTestContext ctx = createTestContext(fieldSerdes, numKeys, leafType);
+        ctx.getIndex().create();
+        ctx.getIndex().activate();
+        // Start off with one tree bulk loaded.
+        // We assume all fieldSerdes are of the same type. Check the first one
+        // to determine which field types to generate.
+        if (fieldSerdes[0] instanceof IntegerSerializerDeserializer) {
+            orderedIndexTestUtils.bulkLoadIntTuples(ctx, numTuplesToInsert, getRandom());
+        } else if (fieldSerdes[0] instanceof UTF8StringSerializerDeserializer) {
+            orderedIndexTestUtils.bulkLoadStringTuples(ctx, numTuplesToInsert, getRandom());
+        }
+
+        int maxTreesToMerge = AccessMethodTestsConfig.LSM_BTREE_MAX_TREES_TO_MERGE;
+        for (int i = 0; i < maxTreesToMerge; i++) {
+            for (int j = 0; j < i; j++) {
+                if (fieldSerdes[0] instanceof IntegerSerializerDeserializer) {
+                    orderedIndexTestUtils.bulkLoadIntTuples(ctx, numTuplesToInsert, getRandom());
+                } else if (fieldSerdes[0] instanceof UTF8StringSerializerDeserializer) {
+                    orderedIndexTestUtils.bulkLoadStringTuples(ctx, numTuplesToInsert, getRandom());
+                }
+            }
+
+            ILSMIndexAccessor accessor = (ILSMIndexAccessor) ctx.getIndexAccessor();
+            accessor.scheduleMerge(NoOpIOOperationCallback.INSTANCE);
+
+            orderedIndexTestUtils.checkPointSearches(ctx);
+            orderedIndexTestUtils.checkScan(ctx);
+            orderedIndexTestUtils.checkDiskOrderScan(ctx);
+            orderedIndexTestUtils.checkRangeSearch(ctx, lowKey, highKey, true, true);
+            if (prefixLowKey != null && prefixHighKey != null) {
+                orderedIndexTestUtils.checkRangeSearch(ctx, prefixLowKey, prefixHighKey, true, true);
+            }
+        }
+        ctx.getIndex().deactivate();
+        ctx.getIndex().destroy();
+    }
+
+    @Override
+    protected String getTestOpName() {
+        return "LSM Merge";
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeModificationOperationCallbackTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeModificationOperationCallbackTest.java
new file mode 100644
index 0000000..648e70f
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeModificationOperationCallbackTest.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree;
+
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
+import edu.uci.ics.hyracks.storage.am.btree.AbstractModificationOperationCallbackTest;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeUtils;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BlockingIOOperationCallbackWrapper;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpOperationTrackerFactory;
+
+public class LSMBTreeModificationOperationCallbackTest extends AbstractModificationOperationCallbackTest {
+    private static final int NUM_TUPLES = 11;
+
+    private final LSMBTreeTestHarness harness;
+    private final BlockingIOOperationCallbackWrapper ioOpCallback;
+
+    public LSMBTreeModificationOperationCallbackTest() {
+        super();
+        this.ioOpCallback = new BlockingIOOperationCallbackWrapper(NoOpIOOperationCallback.INSTANCE);
+        harness = new LSMBTreeTestHarness();
+    }
+
+    @Override
+    protected void createIndexInstance() throws Exception {
+        index = LSMBTreeUtils.createLSMTree(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), SerdeUtils.serdesToTypeTraits(keySerdes),
+                SerdeUtils.serdesToComparatorFactories(keySerdes, keySerdes.length), bloomFilterKeyFields,
+                harness.getMergePolicy(), NoOpOperationTrackerFactory.INSTANCE, harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    public void setup() throws Exception {
+        harness.setUp();
+        super.setup();
+    }
+
+    @Override
+    public void tearDown() throws Exception {
+        super.tearDown();
+        harness.tearDown();
+    }
+
+    @Test
+    public void modificationCallbackTest() throws Exception {
+        ILSMIndexAccessor accessor = (ILSMIndexAccessor) index.createAccessor(cb, NoOpOperationCallback.INSTANCE);
+
+        for (int j = 0; j < 2; j++) {
+            isFoundNull = true;
+            for (int i = 0; i < NUM_TUPLES; i++) {
+                TupleUtils.createIntegerTuple(builder, tuple, i);
+                accessor.insert(tuple);
+            }
+
+            if (j == 1) {
+                accessor.scheduleFlush(ioOpCallback);
+                ioOpCallback.waitForIO();
+                isFoundNull = true;
+            } else {
+                isFoundNull = false;
+            }
+
+            for (int i = 0; i < NUM_TUPLES; i++) {
+                TupleUtils.createIntegerTuple(builder, tuple, i);
+                accessor.upsert(tuple);
+            }
+
+            if (j == 1) {
+                accessor.scheduleFlush(ioOpCallback);
+                ioOpCallback.waitForIO();
+                isFoundNull = true;
+            } else {
+                isFoundNull = false;
+            }
+
+            for (int i = 0; i < NUM_TUPLES; i++) {
+                TupleUtils.createIntegerTuple(builder, tuple, i);
+                accessor.delete(tuple);
+            }
+
+            accessor.scheduleFlush(ioOpCallback);
+            ioOpCallback.waitForIO();
+        }
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeMultiBulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeMultiBulkLoadTest.java
new file mode 100644
index 0000000..3a99c16
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeMultiBulkLoadTest.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexBulkLoadTest;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestHarness;
+
+@SuppressWarnings("rawtypes")
+public class LSMBTreeMultiBulkLoadTest extends OrderedIndexBulkLoadTest {
+    public LSMBTreeMultiBulkLoadTest() {
+        // Using 5 bulk load rounds.
+        super(LSMBTreeTestHarness.LEAF_FRAMES_TO_TEST, AccessMethodTestsConfig.LSM_BTREE_BULKLOAD_ROUNDS);
+    }
+
+    private final LSMBTreeTestHarness harness = new LSMBTreeTestHarness();
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
+            BTreeLeafFrameType leafType) throws Exception {
+        return LSMBTreeTestContext.create(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), fieldSerdes, numKeys, harness.getMergePolicy(),
+                harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeSearchOperationCallbackTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeSearchOperationCallbackTest.java
new file mode 100644
index 0000000..389c87f
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeSearchOperationCallbackTest.java
@@ -0,0 +1,263 @@
+package edu.uci.ics.hyracks.storage.am.lsm.btree;
+
+import java.util.HashSet;
+import java.util.concurrent.Callable;
+import java.util.concurrent.Future;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
+import edu.uci.ics.hyracks.storage.am.btree.AbstractSearchOperationCallbackTest;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeUtils;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpOperationTrackerFactory;
+
+public class LSMBTreeSearchOperationCallbackTest extends AbstractSearchOperationCallbackTest {
+    private final LSMBTreeTestHarness harness;
+    private final HashSet<Integer> deleteSet;
+
+    public LSMBTreeSearchOperationCallbackTest() {
+        harness = new LSMBTreeTestHarness();
+        deleteSet = new HashSet<Integer>();
+    }
+
+    @Override
+    protected void createIndexInstance() throws Exception {
+        index = LSMBTreeUtils.createLSMTree(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), SerdeUtils.serdesToTypeTraits(keySerdes),
+                SerdeUtils.serdesToComparatorFactories(keySerdes, keySerdes.length), bloomFilterKeyFields,
+                harness.getMergePolicy(), NoOpOperationTrackerFactory.INSTANCE, harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    public void setup() throws Exception {
+        harness.setUp();
+        super.setup();
+    }
+
+    @Override
+    public void tearDown() throws Exception {
+        super.tearDown();
+        harness.tearDown();
+    }
+
+    @Test
+    public void searchCallbackTest() throws Exception {
+        Future<Boolean> insertFuture = executor.submit(new InsertionTask());
+        Future<Boolean> searchFuture = executor.submit(new SearchTask());
+        Assert.assertTrue(searchFuture.get());
+        Assert.assertTrue(insertFuture.get());
+    }
+
+    private class SearchTask implements Callable<Boolean> {
+        private final ISearchOperationCallback cb;
+        private final IIndexAccessor accessor;
+        private final IIndexCursor cursor;
+        private final RangePredicate predicate;
+        private final ArrayTupleBuilder builder;
+        private final ArrayTupleReference tuple;
+        private final ArrayTupleBuilder expectedTupleToBeLockedBuilder;
+        private final ArrayTupleReference expectedTupleToBeLocked;
+        private final ArrayTupleBuilder expectedTupleToBeCanceledBuilder;
+        private final ArrayTupleReference expectedTupleToBeCanceled;
+
+        private boolean blockOnHigh;
+        private int expectedAfterBlock;
+        private int expectedTupleToBeLockedValue;
+
+        public SearchTask() {
+            this.cb = new SynchronizingSearchOperationCallback();
+            this.accessor = index.createAccessor(NoOpOperationCallback.INSTANCE, cb);
+            this.cursor = accessor.createSearchCursor();
+            this.predicate = new RangePredicate();
+            this.builder = new ArrayTupleBuilder(NUM_KEY_FIELDS);
+            this.tuple = new ArrayTupleReference();
+            this.expectedTupleToBeLockedBuilder = new ArrayTupleBuilder(NUM_KEY_FIELDS);
+            this.expectedTupleToBeLocked = new ArrayTupleReference();
+            this.expectedTupleToBeCanceledBuilder = new ArrayTupleBuilder(NUM_KEY_FIELDS);
+            this.expectedTupleToBeCanceled = new ArrayTupleReference();
+
+            this.blockOnHigh = false;
+            this.expectedAfterBlock = -1;
+            this.expectedTupleToBeLockedValue = -1;
+        }
+
+        @Override
+        public Boolean call() throws Exception {
+            lock.lock();
+            try {
+                if (!insertTaskStarted) {
+                    condition.await();
+                }
+
+                // begin a search on [50, +inf), blocking on 75
+                TupleUtils.createIntegerTuple(builder, tuple, 50);
+                predicate.setLowKey(tuple, true);
+                predicate.setHighKey(null, true);
+                accessor.search(cursor, predicate);
+                expectedTupleToBeLockedValue = 50;
+                TupleUtils.createIntegerTuple(builder, expectedTupleToBeLocked, expectedTupleToBeLockedValue);
+                consumeIntTupleRange(50, 75, true, 76);
+
+                // consume tuples [77, 150], blocking on 151
+                consumeIntTupleRange(77, 150, true, 150);
+
+                // consume tuples [152, 300]
+                consumeIntTupleRange(152, 300, false, -1);
+
+                cursor.close();
+            } finally {
+                lock.unlock();
+            }
+
+            return true;
+        }
+
+        private void consumeIntTupleRange(int begin, int end, boolean blockOnHigh, int expectedAfterBlock)
+                throws Exception {
+            if (end < begin) {
+                throw new IllegalArgumentException("Invalid range: [" + begin + ", " + end + "]");
+            }
+
+            for (int i = begin; i <= end; i++) {
+                if (blockOnHigh == true && i == end) {
+                    this.blockOnHigh = true;
+                    this.expectedAfterBlock = expectedAfterBlock;
+                }
+                TupleUtils.createIntegerTuple(builder, tuple, i);
+                if (!cursor.hasNext()) {
+                    Assert.fail("Failed to consume entire tuple range since cursor is exhausted.");
+                }
+                cursor.next();
+                Assert.assertEquals(0, cmp.compare(tuple, cursor.getTuple()));
+            }
+        }
+
+        private class SynchronizingSearchOperationCallback implements ISearchOperationCallback {
+
+            @Override
+            public boolean proceed(ITupleReference tuple) {
+                Assert.assertEquals(0, cmp.compare(SearchTask.this.expectedTupleToBeLocked, tuple));
+                return false;
+            }
+
+            @Override
+            public void reconcile(ITupleReference tuple) throws HyracksDataException {
+                Assert.assertEquals(0, cmp.compare(SearchTask.this.expectedTupleToBeLocked, tuple));
+                if (blockOnHigh) {
+                    TupleUtils.createIntegerTuple(builder, SearchTask.this.tuple, expectedAfterBlock);
+                    condition.signal();
+                    condition.awaitUninterruptibly();
+                    blockOnHigh = false;
+                }
+                expectedTupleToBeLockedValue++;
+                TupleUtils.createIntegerTuple(expectedTupleToBeLockedBuilder, expectedTupleToBeLocked,
+                        expectedTupleToBeLockedValue);
+
+            }
+
+            @Override
+            public void cancel(ITupleReference tuple) throws HyracksDataException {
+                boolean found = false;
+                for (int i : deleteSet) {
+                    TupleUtils.createIntegerTuple(expectedTupleToBeCanceledBuilder, expectedTupleToBeCanceled, i);
+                    if (cmp.compare(SearchTask.this.expectedTupleToBeCanceled, tuple) == 0) {
+                        found = true;
+                        break;
+                    }
+                }
+                Assert.assertTrue(found);
+            }
+
+        }
+    }
+
+    private class InsertionTask implements Callable<Boolean> {
+        private final IIndexAccessor accessor;
+        private final ArrayTupleBuilder builder;
+        private final ArrayTupleReference tuple;
+
+        public InsertionTask() {
+            this.accessor = index.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            this.builder = new ArrayTupleBuilder(NUM_KEY_FIELDS);
+            this.tuple = new ArrayTupleReference();
+        }
+
+        @Override
+        public Boolean call() throws Exception {
+            lock.lock();
+            try {
+                insertTaskStarted = true;
+
+                // bulkload [101, 150] & [151, 200] as two separate disk components 
+                // insert [50, 100] & [301, 350] to the in-memory component
+                // delete tuple 151
+                bulkloadIntTupleRange(101, 150);
+                bulkloadIntTupleRange(151, 200);
+                insertIntTupleRange(50, 100);
+                insertIntTupleRange(301, 350);
+                int tupleTobeDeletedValue = 151;
+                deleteSet.add(tupleTobeDeletedValue);
+                TupleUtils.createIntegerTuple(builder, tuple, tupleTobeDeletedValue);
+                accessor.delete(tuple);
+                condition.signal();
+                condition.await();
+
+                // delete tuple 75
+                tupleTobeDeletedValue = 75;
+                deleteSet.add(tupleTobeDeletedValue);
+                TupleUtils.createIntegerTuple(builder, tuple, tupleTobeDeletedValue);
+                accessor.delete(tuple);
+                condition.signal();
+                condition.await();
+
+                // insert tuples [201, 300] and delete tuple 151
+                insertIntTupleRange(201, 300);
+                condition.signal();
+            } finally {
+                lock.unlock();
+            }
+
+            return true;
+        }
+
+        private void insertIntTupleRange(int begin, int end) throws Exception {
+            if (end < begin) {
+                throw new IllegalArgumentException("Invalid range: [" + begin + ", " + end + "]");
+            }
+
+            for (int i = begin; i <= end; i++) {
+                TupleUtils.createIntegerTuple(builder, tuple, i);
+                accessor.insert(tuple);
+            }
+        }
+
+        private void bulkloadIntTupleRange(int begin, int end) throws Exception {
+            if (end < begin) {
+                throw new IllegalArgumentException("Invalid range: [" + begin + ", " + end + "]");
+            }
+
+            IIndexBulkLoader bulkloader = index.createBulkLoader(1.0f, false, end - begin);
+            for (int i = begin; i <= end; i++) {
+                TupleUtils.createIntegerTuple(builder, tuple, i);
+                bulkloader.add(tuple);
+            }
+            bulkloader.end();
+        }
+
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeUpdateTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeUpdateTest.java
new file mode 100644
index 0000000..ca89512
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/LSMBTreeUpdateTest.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexUpdateTest;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestHarness;
+
+@SuppressWarnings("rawtypes")
+public class LSMBTreeUpdateTest extends OrderedIndexUpdateTest {
+
+    public LSMBTreeUpdateTest() {
+        super(LSMBTreeTestHarness.LEAF_FRAMES_TO_TEST);
+    }
+
+    private final LSMBTreeTestHarness harness = new LSMBTreeTestHarness();
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
+            BTreeLeafFrameType leafType) throws Exception {
+        return LSMBTreeTestContext.create(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), fieldSerdes, numKeys, harness.getMergePolicy(),
+                harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/multithread/LSMBTreeMultiThreadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/multithread/LSMBTreeMultiThreadTest.java
new file mode 100644
index 0000000..c494448
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/multithread/LSMBTreeMultiThreadTest.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.multithread;
+
+import java.util.ArrayList;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexMultiThreadTest;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestWorkerFactory;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.TestWorkloadConf;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.ProbabilityHelper;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeUtils;
+
+public class LSMBTreeMultiThreadTest extends OrderedIndexMultiThreadTest {
+
+    private LSMBTreeTestHarness harness = new LSMBTreeTestHarness();
+
+    private LSMBTreeTestWorkerFactory workerFactory = new LSMBTreeTestWorkerFactory();
+
+    @Override
+    protected void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @Override
+    protected void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected ITreeIndex createIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories,
+            int[] bloomFilterKeyFields) throws TreeIndexException {
+        return LSMBTreeUtils.createLSMTree(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), typeTraits, cmpFactories, bloomFilterKeyFields,
+                harness.getMergePolicy(), harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    protected IIndexTestWorkerFactory getWorkerFactory() {
+        return workerFactory;
+    }
+
+    @Override
+    protected ArrayList<TestWorkloadConf> getTestWorkloadConf() {
+        ArrayList<TestWorkloadConf> workloadConfs = new ArrayList<TestWorkloadConf>();
+
+        // Insert only workload.
+        TestOperation[] insertOnlyOps = new TestOperation[] { TestOperation.INSERT };
+        workloadConfs.add(new TestWorkloadConf(insertOnlyOps, ProbabilityHelper
+                .getUniformProbDist(insertOnlyOps.length)));
+
+        // Insert and merge workload.
+        TestOperation[] insertMergeOps = new TestOperation[] { TestOperation.INSERT, TestOperation.MERGE };
+        workloadConfs.add(new TestWorkloadConf(insertMergeOps, ProbabilityHelper
+                .getUniformProbDist(insertMergeOps.length)));
+
+        // Inserts mixed with point searches and scans.
+        TestOperation[] insertSearchOnlyOps = new TestOperation[] { TestOperation.INSERT, TestOperation.POINT_SEARCH,
+                TestOperation.SCAN };
+        workloadConfs.add(new TestWorkloadConf(insertSearchOnlyOps, ProbabilityHelper
+                .getUniformProbDist(insertSearchOnlyOps.length)));
+
+        // Inserts, updates, and deletes.
+        TestOperation[] insertDeleteUpdateOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE,
+                TestOperation.UPDATE };
+        workloadConfs.add(new TestWorkloadConf(insertDeleteUpdateOps, ProbabilityHelper
+                .getUniformProbDist(insertDeleteUpdateOps.length)));
+
+        // Inserts, updates, deletes and merges.
+        TestOperation[] insertDeleteUpdateMergeOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE,
+                TestOperation.UPDATE, TestOperation.MERGE };
+        workloadConfs.add(new TestWorkloadConf(insertDeleteUpdateMergeOps, ProbabilityHelper
+                .getUniformProbDist(insertDeleteUpdateMergeOps.length)));
+
+        // All operations except merge.
+        TestOperation[] allNoMergeOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE,
+                TestOperation.UPDATE, TestOperation.POINT_SEARCH, TestOperation.SCAN };
+        workloadConfs.add(new TestWorkloadConf(allNoMergeOps, ProbabilityHelper
+                .getUniformProbDist(allNoMergeOps.length)));
+
+        // All operations.
+        TestOperation[] allOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE,
+                TestOperation.UPDATE, TestOperation.POINT_SEARCH, TestOperation.SCAN, TestOperation.MERGE };
+        workloadConfs.add(new TestWorkloadConf(allOps, ProbabilityHelper.getUniformProbDist(allOps.length)));
+
+        return workloadConfs;
+    }
+
+    @Override
+    protected String getIndexTypeName() {
+        return "LSMBTree";
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/multithread/LSMBTreeTestWorker.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/multithread/LSMBTreeTestWorker.java
new file mode 100644
index 0000000..c008f90
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/multithread/LSMBTreeTestWorker.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.multithread;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeDuplicateKeyException;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeNonExistentKeyException;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeNotUpdateableException;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexTestWorker;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.impls.LSMBTree;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.impls.LSMBTree.LSMBTreeAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+
+public class LSMBTreeTestWorker extends AbstractIndexTestWorker {
+    private final LSMBTree lsmBTree;
+    private final int numKeyFields;
+    private final ArrayTupleBuilder deleteTb;
+    private final ArrayTupleReference deleteTuple = new ArrayTupleReference();
+
+    public LSMBTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches) {
+        super(dataGen, opSelector, index, numBatches);
+        lsmBTree = (LSMBTree) index;
+        numKeyFields = lsmBTree.getComparatorFactories().length;
+        deleteTb = new ArrayTupleBuilder(numKeyFields);
+    }
+
+    @Override
+    public void performOp(ITupleReference tuple, TestOperation op) throws HyracksDataException, IndexException {
+        LSMBTreeAccessor accessor = (LSMBTreeAccessor) indexAccessor;
+        IIndexCursor searchCursor = accessor.createSearchCursor();
+        MultiComparator cmp = accessor.getMultiComparator();
+        RangePredicate rangePred = new RangePredicate(tuple, tuple, true, true, cmp, cmp);
+
+        switch (op) {
+            case INSERT:
+                try {
+                    accessor.insert(tuple);
+                } catch (BTreeDuplicateKeyException e) {
+                    // Ignore duplicate keys, since we get random tuples.
+                }
+                break;
+
+            case DELETE:
+                // Create a tuple reference with only key fields.
+                deleteTb.reset();
+                for (int i = 0; i < numKeyFields; i++) {
+                    deleteTb.addField(tuple.getFieldData(i), tuple.getFieldStart(i), tuple.getFieldLength(i));
+                }
+                deleteTuple.reset(deleteTb.getFieldEndOffsets(), deleteTb.getByteArray());
+                try {
+                    accessor.delete(deleteTuple);
+                } catch (BTreeNonExistentKeyException e) {
+                    // Ignore non-existant keys, since we get random tuples.
+                }
+                break;
+
+            case UPDATE:
+                try {
+                    accessor.update(tuple);
+                } catch (BTreeNonExistentKeyException e) {
+                    // Ignore non-existant keys, since we get random tuples.
+                } catch (BTreeNotUpdateableException e) {
+                    // Ignore not updateable exception due to numKeys == numFields.
+                }
+                break;
+
+            case POINT_SEARCH:
+                searchCursor.reset();
+                rangePred.setLowKey(tuple, true);
+                rangePred.setHighKey(tuple, true);
+                accessor.search(searchCursor, rangePred);
+                consumeCursorTuples(searchCursor);
+                break;
+
+            case SCAN:
+                searchCursor.reset();
+                rangePred.setLowKey(null, true);
+                rangePred.setHighKey(null, true);
+                accessor.search(searchCursor, rangePred);
+                consumeCursorTuples(searchCursor);
+                break;
+
+            case MERGE:
+                accessor.scheduleMerge(NoOpIOOperationCallback.INSTANCE);
+                break;
+
+            default:
+                throw new HyracksDataException("Op " + op.toString() + " not supported.");
+        }
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/multithread/LSMBTreeTestWorkerFactory.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/multithread/LSMBTreeTestWorkerFactory.java
new file mode 100644
index 0000000..03463e6
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/multithread/LSMBTreeTestWorkerFactory.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.multithread;
+
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexTestWorker;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestWorkerFactory;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+
+public class LSMBTreeTestWorkerFactory implements IIndexTestWorkerFactory {
+    @Override
+    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector,
+            IIndex index, int numBatches) {
+        return new LSMBTreeTestWorker(dataGen, opSelector, index, numBatches);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/BTreeBulkLoadRunner.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/BTreeBulkLoadRunner.java
new file mode 100644
index 0000000..69e2b58
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/BTreeBulkLoadRunner.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.perf;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeException;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+import edu.uci.ics.hyracks.storage.am.common.datagen.TupleBatch;
+
+public class BTreeBulkLoadRunner extends BTreeRunner {
+
+    protected final float fillFactor;
+
+    public BTreeBulkLoadRunner(int numBatches, int pageSize, int numPages, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] cmpFactories, float fillFactor) throws HyracksDataException, BTreeException {
+        super(numBatches, pageSize, numPages, typeTraits, cmpFactories);
+        this.fillFactor = fillFactor;
+    }
+
+    @Override
+    public long runExperiment(DataGenThread dataGen, int numThreads) throws Exception {
+        btree.create();
+        long start = System.currentTimeMillis();
+        IIndexBulkLoader bulkLoader = btree.createBulkLoader(1.0f, false, 0L);
+        for (int i = 0; i < numBatches; i++) {
+            TupleBatch batch = dataGen.tupleBatchQueue.take();
+            for (int j = 0; j < batch.size(); j++) {
+                bulkLoader.add(batch.get(j));
+            }
+        }
+        bulkLoader.end();
+        long end = System.currentTimeMillis();
+        long time = end - start;
+        return time;
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/BTreePageSizePerf.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/BTreePageSizePerf.java
new file mode 100644
index 0000000..7e0514b
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/BTreePageSizePerf.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.perf;
+
+import java.util.Enumeration;
+import java.util.logging.Level;
+import java.util.logging.LogManager;
+import java.util.logging.Logger;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+
+public class BTreePageSizePerf {
+    public static void main(String[] args) throws Exception {
+        // Disable logging so we can better see the output times.
+        Enumeration<String> loggers = LogManager.getLogManager().getLoggerNames();
+        while(loggers.hasMoreElements()) {
+            String loggerName = loggers.nextElement();
+            Logger logger = LogManager.getLogManager().getLogger(loggerName);
+            logger.setLevel(Level.OFF);
+        }
+        
+        int numTuples = 1000000;
+        int batchSize = 10000;
+        int numBatches = numTuples / batchSize;
+        
+        ISerializerDeserializer[] fieldSerdes = new ISerializerDeserializer[] { IntegerSerializerDeserializer.INSTANCE };
+        ITypeTraits[] typeTraits = SerdeUtils.serdesToTypeTraits(fieldSerdes, 30);
+        
+        IBinaryComparatorFactory[] cmpFactories = SerdeUtils.serdesToComparatorFactories(fieldSerdes, fieldSerdes.length);
+        
+        runExperiment(numBatches, batchSize, 1024, 100000, fieldSerdes, cmpFactories, typeTraits);
+        runExperiment(numBatches, batchSize, 2048, 100000, fieldSerdes, cmpFactories, typeTraits);
+        runExperiment(numBatches, batchSize, 4096, 25000, fieldSerdes, cmpFactories, typeTraits);
+        runExperiment(numBatches, batchSize, 8192, 12500, fieldSerdes, cmpFactories, typeTraits);
+        runExperiment(numBatches, batchSize, 16384, 6250, fieldSerdes, cmpFactories, typeTraits);
+        runExperiment(numBatches, batchSize, 32768, 3125, fieldSerdes, cmpFactories, typeTraits);
+        runExperiment(numBatches, batchSize, 65536, 1564, fieldSerdes, cmpFactories, typeTraits);
+        runExperiment(numBatches, batchSize, 131072, 782, fieldSerdes, cmpFactories, typeTraits);
+        runExperiment(numBatches, batchSize, 262144, 391, fieldSerdes, cmpFactories, typeTraits);
+    }
+    
+    private static void runExperiment(int numBatches, int batchSize, int pageSize, int numPages, ISerializerDeserializer[] fieldSerdes, IBinaryComparatorFactory[] cmpFactories, ITypeTraits[] typeTraits) throws Exception {
+        System.out.println("PAGE SIZE: " + pageSize);
+        System.out.println("NUM PAGES: " + numPages);
+        System.out.println("MEMORY: " + (pageSize * numPages));
+        int repeats = 5;
+        long[] times = new long[repeats];
+        //BTreeRunner runner = new BTreeRunner(numTuples, pageSize, numPages, typeTraits, cmp);
+        InMemoryBTreeRunner runner = new InMemoryBTreeRunner(numBatches, pageSize, numPages, typeTraits, cmpFactories);
+        runner.init();
+        int numThreads = 1;
+        for (int i = 0; i < repeats; i++) {
+            DataGenThread dataGen = new DataGenThread(numThreads, numBatches, batchSize, fieldSerdes, 30, 50, 10, false);
+            dataGen.start();            
+            times[i] = runner.runExperiment(dataGen, numThreads);
+            System.out.println("TIME " + i + ": " + times[i] + "ms");
+        }
+        runner.deinit();
+        long avgTime = 0;
+        for (int i = 0; i < repeats; i++) {
+            avgTime += times[i];
+        }
+        avgTime /= repeats;
+        System.out.println("AVG TIME: " + avgTime + "ms");
+        System.out.println("-------------------------------");
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/BTreeRunner.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/BTreeRunner.java
new file mode 100644
index 0000000..8658919
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/BTreeRunner.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.perf;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeException;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.btree.util.BTreeUtils;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.test.support.TestUtils;
+
+public class BTreeRunner extends InMemoryBTreeRunner {
+    protected static final int MAX_OPEN_FILES = 10;
+    protected static final int HYRACKS_FRAME_SIZE = 128;
+
+    public BTreeRunner(int numTuples, int pageSize, int numPages, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] cmpFactories) throws HyracksDataException, BTreeException {
+        super(numTuples, pageSize, numPages, typeTraits, cmpFactories);
+    }
+
+    @Override
+    protected void init(int pageSize, int numPages, ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories)
+            throws HyracksDataException, BTreeException {
+        IHyracksTaskContext ctx = TestUtils.create(HYRACKS_FRAME_SIZE);
+        TestStorageManagerComponentHolder.init(pageSize, numPages, MAX_OPEN_FILES);
+        bufferCache = TestStorageManagerComponentHolder.getBufferCache(ctx);
+        IFileMapProvider fmp = TestStorageManagerComponentHolder.getFileMapProvider(ctx);
+        btree = BTreeUtils
+                .createBTree(bufferCache, fmp, typeTraits, cmpFactories, BTreeLeafFrameType.REGULAR_NSM, file);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/ConcurrentSkipListRunner.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/ConcurrentSkipListRunner.java
new file mode 100644
index 0000000..8f44966
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/ConcurrentSkipListRunner.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.perf;
+
+import java.nio.ByteBuffer;
+import java.util.Comparator;
+import java.util.concurrent.ConcurrentSkipListSet;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+import edu.uci.ics.hyracks.storage.am.common.datagen.TupleBatch;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriter;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
+
+public class ConcurrentSkipListRunner implements IExperimentRunner {
+    public class TupleComparator implements Comparator<ITupleReference> {
+        private final MultiComparator cmp;
+
+        public TupleComparator(MultiComparator cmp) {
+            this.cmp = cmp;
+        }
+
+        @Override
+        public int compare(ITupleReference o1, ITupleReference o2) {
+            return cmp.compare(o1, o2);
+        }
+    }
+    
+    private final TupleComparator tupleCmp;
+    private final int numBatches;
+    private final int batchSize;
+    private final int tupleSize;
+    private final ITypeTraits[] typeTraits;
+    
+    public ConcurrentSkipListRunner(int numBatches, int batchSize, int tupleSize, ITypeTraits[] typeTraits, MultiComparator cmp) {
+        this.numBatches = numBatches;
+        this.tupleSize = tupleSize;
+        this.batchSize = batchSize;
+        this.typeTraits = typeTraits;
+        tupleCmp = new TupleComparator(cmp);
+    }
+    
+    @Override
+    public long runExperiment(DataGenThread dataGen, int numThreads) throws InterruptedException {
+        ConcurrentSkipListSet<ITupleReference> skipList = new ConcurrentSkipListSet<ITupleReference>(tupleCmp);
+        SkipListThread[] threads = new SkipListThread[numThreads];
+        int threadNumBatches = numBatches / numThreads;
+        for (int i = 0; i < numThreads; i++) {
+            threads[i] = new SkipListThread(dataGen, skipList, threadNumBatches, batchSize);            
+        }
+        // Wait until the tupleBatchQueue is completely full.
+        while (dataGen.tupleBatchQueue.remainingCapacity() != 0) {
+            Thread.sleep(10);
+        }
+        
+        long start = System.currentTimeMillis();
+        for (int i = 0; i < numThreads; i++) {
+            threads[i].start();
+        }
+        for (int i = 0; i < numThreads; i++) {
+            threads[i].join();
+        }
+        long end = System.currentTimeMillis();
+        long time = end - start;
+        return time;
+    }
+
+    @Override
+    public void init() throws Exception {
+    }
+
+    @Override
+    public void deinit() throws Exception {
+    }
+    
+    public void reset() throws Exception {
+    }
+    
+    public class SkipListThread extends Thread {
+    	private final DataGenThread dataGen;
+    	private final ConcurrentSkipListSet<ITupleReference> skipList;
+    	private final int numBatches;
+        public final TypeAwareTupleWriterFactory tupleWriterFactory;
+        public final TypeAwareTupleWriter tupleWriter;
+        public final TypeAwareTupleReference[] tuples;        
+        public final ByteBuffer tupleBuf; 
+
+        public SkipListThread(DataGenThread dataGen, ConcurrentSkipListSet<ITupleReference> skipList, int numBatches, int batchSize) {
+            this.dataGen = dataGen;
+            this.numBatches = numBatches;
+            this.skipList = skipList;
+            tupleWriterFactory = new TypeAwareTupleWriterFactory(typeTraits);
+            tupleWriter = (TypeAwareTupleWriter) tupleWriterFactory.createTupleWriter();
+            int numTuples = numBatches * batchSize;
+            tuples = new TypeAwareTupleReference[numTuples];
+            tupleBuf = ByteBuffer.allocate(numTuples * tupleSize);
+            for (int i = 0; i < numTuples; i++) {
+                tuples[i] = (TypeAwareTupleReference) tupleWriter.createTupleReference();
+            }
+        }
+    	
+        @Override
+        public void run() {
+            int tupleIndex = 0;
+            try {                
+                for (int i = 0; i < numBatches; i++) {
+                    TupleBatch batch = dataGen.tupleBatchQueue.take();
+                    for (int j = 0; j < batch.size(); j++) {
+                        // Copy the tuple to the buffer and set the pre-created tuple ref.                        
+                        tupleWriter.writeTuple(batch.get(j), tupleBuf.array(), tupleIndex * tupleSize);
+                        tuples[tupleIndex].resetByTupleOffset(tupleBuf, tupleIndex * tupleSize);
+                        skipList.add(tuples[tupleIndex]);
+                        tupleIndex++;
+                    }
+                }
+            } catch (Exception e) {
+                System.out.println(tupleIndex);
+                e.printStackTrace();
+            }
+        }
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/IExperimentRunner.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/IExperimentRunner.java
new file mode 100644
index 0000000..0ea3a71
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/IExperimentRunner.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.perf;
+
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+
+public interface IExperimentRunner {
+    public static int DEFAULT_MAX_OUTSTANDING = 100000;
+    
+    public void init() throws Exception;
+    
+    public long runExperiment(DataGenThread dataGen, int numThreads) throws Exception;
+    
+    public void reset() throws Exception;
+    
+    public void deinit() throws Exception;
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/InMemoryBTreeRunner.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/InMemoryBTreeRunner.java
new file mode 100644
index 0000000..1b453b7
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/InMemoryBTreeRunner.java
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.perf;
+
+import java.io.File;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeException;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMInteriorFrameFactory;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMLeafFrameFactory;
+import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
+import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+import edu.uci.ics.hyracks.storage.am.common.datagen.TupleBatch;
+import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.InMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.InMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.common.buffercache.HeapBufferAllocator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICacheMemoryAllocator;
+import edu.uci.ics.hyracks.storage.common.file.TransientFileMapManager;
+
+public class InMemoryBTreeRunner extends Thread implements IExperimentRunner {
+    protected IBufferCache bufferCache;
+    protected FileReference file;
+
+    protected final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
+    protected final static String tmpDir = System.getProperty("java.io.tmpdir");
+    protected final static String sep = System.getProperty("file.separator");
+    protected String fileName;
+
+    protected final int numBatches;
+    protected BTree btree;
+
+    public InMemoryBTreeRunner(int numBatches, int pageSize, int numPages, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] cmpFactories) throws HyracksDataException, BTreeException {
+        this.numBatches = numBatches;
+        fileName = tmpDir + sep + simpleDateFormat.format(new Date());
+        file = new FileReference(new File(fileName));
+        init(pageSize, numPages, typeTraits, cmpFactories);
+    }
+
+    protected void init(int pageSize, int numPages, ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories)
+            throws HyracksDataException, BTreeException {
+        ICacheMemoryAllocator allocator = new HeapBufferAllocator();
+        bufferCache = new InMemoryBufferCache(allocator, pageSize, numPages, new TransientFileMapManager());
+        TypeAwareTupleWriterFactory tupleWriterFactory = new TypeAwareTupleWriterFactory(typeTraits);
+        ITreeIndexFrameFactory leafFrameFactory = new BTreeNSMLeafFrameFactory(tupleWriterFactory);
+        ITreeIndexFrameFactory interiorFrameFactory = new BTreeNSMInteriorFrameFactory(tupleWriterFactory);
+        ITreeIndexMetaDataFrameFactory metaFrameFactory = new LIFOMetaDataFrameFactory();
+        IFreePageManager freePageManager = new InMemoryFreePageManager(bufferCache.getNumPages(), metaFrameFactory);
+        btree = new BTree(bufferCache, new TransientFileMapManager(), freePageManager, interiorFrameFactory,
+                leafFrameFactory, cmpFactories, typeTraits.length, file);
+    }
+
+    @Override
+    public long runExperiment(DataGenThread dataGen, int numThreads) throws Exception {
+        BTreeThread[] threads = new BTreeThread[numThreads];
+        int threadNumBatches = numBatches / numThreads;
+        for (int i = 0; i < numThreads; i++) {
+            threads[i] = new BTreeThread(dataGen, btree, threadNumBatches);
+        }
+        // Wait until the tupleBatchQueue is completely full.
+        while (dataGen.tupleBatchQueue.remainingCapacity() != 0) {
+            Thread.sleep(10);
+        }
+
+        long start = System.currentTimeMillis();
+        for (int i = 0; i < numThreads; i++) {
+            threads[i].start();
+        }
+        for (int i = 0; i < numThreads; i++) {
+            threads[i].join();
+        }
+        long end = System.currentTimeMillis();
+        long time = end - start;
+        return time;
+    }
+
+    @Override
+    public void init() throws Exception {
+    }
+
+    @Override
+    public void deinit() throws Exception {
+        bufferCache.close();
+    }
+
+    @Override
+    public void reset() throws Exception {
+        btree.create();
+    }
+
+    public class BTreeThread extends Thread {
+        private final DataGenThread dataGen;
+        private final int numBatches;
+        private final ITreeIndexAccessor indexAccessor;
+
+        public BTreeThread(DataGenThread dataGen, BTree btree, int numBatches) {
+            this.dataGen = dataGen;
+            this.numBatches = numBatches;
+            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        }
+
+        @Override
+        public void run() {
+            try {
+                for (int i = 0; i < numBatches; i++) {
+                    TupleBatch batch = dataGen.tupleBatchQueue.take();
+                    for (int j = 0; j < batch.size(); j++) {
+                        try {
+                            indexAccessor.insert(batch.get(j));
+                        } catch (TreeIndexException e) {
+                        }
+                    }
+                }
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/InMemorySortRunner.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/InMemorySortRunner.java
new file mode 100644
index 0000000..53fbd88
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/InMemorySortRunner.java
@@ -0,0 +1,153 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.perf;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.concurrent.ConcurrentSkipListSet;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+import edu.uci.ics.hyracks.storage.am.common.datagen.TupleBatch;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriter;
+import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
+
+public class InMemorySortRunner implements IExperimentRunner {
+    public class TupleComparator implements Comparator<ITupleReference> {
+        private final MultiComparator cmp;
+
+        public TupleComparator(MultiComparator cmp) {
+            this.cmp = cmp;
+        }
+
+        @Override
+        public int compare(ITupleReference o1, ITupleReference o2) {
+            return cmp.compare(o1, o2);
+        }
+    }
+    
+    private final TupleComparator tupleCmp;
+    private final int numBatches;
+    private final int batchSize;
+    private final int tupleSize;
+    private final ITypeTraits[] typeTraits;
+    
+    private final TypeAwareTupleWriterFactory tupleWriterFactory;
+    private final TypeAwareTupleWriter tupleWriter;
+    private final ArrayList<TypeAwareTupleReference> tuples;        
+    private final ByteBuffer tupleBuf; 
+    
+    public InMemorySortRunner(int numBatches, int batchSize, int tupleSize, ITypeTraits[] typeTraits, MultiComparator cmp) {
+        this.numBatches = numBatches;
+        this.tupleSize = tupleSize;
+        this.batchSize = batchSize;
+        this.typeTraits = typeTraits;
+        tupleCmp = new TupleComparator(cmp);
+        tupleWriterFactory = new TypeAwareTupleWriterFactory(typeTraits);
+        tupleWriter = (TypeAwareTupleWriter) tupleWriterFactory.createTupleWriter();
+        int numTuples = numBatches * batchSize;
+        tuples = new ArrayList<TypeAwareTupleReference>();
+        tupleBuf = ByteBuffer.allocate(numTuples * tupleSize);
+        for (int i = 0; i < numTuples; i++) {
+            tuples.add((TypeAwareTupleReference) tupleWriter.createTupleReference());
+        }
+    }
+    
+    @Override
+    public long runExperiment(DataGenThread dataGen, int numThreads) throws InterruptedException {
+        // Wait until the tupleBatchQueue is completely full.
+        while (dataGen.tupleBatchQueue.remainingCapacity() != 0) {
+            Thread.sleep(10);
+        }
+        
+        long start = System.currentTimeMillis();
+        int tupleIndex = 0;
+        for (int i = 0; i < numBatches; i++) {
+            TupleBatch batch = dataGen.tupleBatchQueue.take();
+            for (int j = 0; j < batch.size(); j++) {
+                // Copy the tuple to the buffer and set the pre-created tuple ref.                        
+                tupleWriter.writeTuple(batch.get(j), tupleBuf.array(), tupleIndex * tupleSize);
+                tuples.get(tupleIndex).resetByTupleOffset(tupleBuf, tupleIndex * tupleSize);
+                tupleIndex++;
+            }
+        }
+        // Perform the sort.        
+        Collections.sort(tuples, tupleCmp);
+        long end = System.currentTimeMillis();
+        long time = end - start;
+        return time;
+    }
+
+    @Override
+    public void init() throws Exception {
+    }
+
+    @Override
+    public void deinit() throws Exception {
+    }
+    
+    public void reset() throws Exception {
+    }
+    
+    public class SkipListThread extends Thread {
+    	private final DataGenThread dataGen;
+    	private final ConcurrentSkipListSet<ITupleReference> skipList;
+    	private final int numBatches;
+        public final TypeAwareTupleWriterFactory tupleWriterFactory;
+        public final TypeAwareTupleWriter tupleWriter;
+        public final TypeAwareTupleReference[] tuples;        
+        public final ByteBuffer tupleBuf; 
+
+        public SkipListThread(DataGenThread dataGen, ConcurrentSkipListSet<ITupleReference> skipList, int numBatches, int batchSize) {
+            this.dataGen = dataGen;
+            this.numBatches = numBatches;
+            this.skipList = skipList;
+            tupleWriterFactory = new TypeAwareTupleWriterFactory(typeTraits);
+            tupleWriter = (TypeAwareTupleWriter) tupleWriterFactory.createTupleWriter();
+            int numTuples = numBatches * batchSize;
+            tuples = new TypeAwareTupleReference[numTuples];
+            tupleBuf = ByteBuffer.allocate(numTuples * tupleSize);
+            for (int i = 0; i < numTuples; i++) {
+                tuples[i] = (TypeAwareTupleReference) tupleWriter.createTupleReference();
+            }
+        }
+    	
+        @Override
+        public void run() {
+            int tupleIndex = 0;
+            try {                
+                for (int i = 0; i < numBatches; i++) {
+                    TupleBatch batch = dataGen.tupleBatchQueue.take();
+                    for (int j = 0; j < batch.size(); j++) {
+                        // Copy the tuple to the buffer and set the pre-created tuple ref.                        
+                        tupleWriter.writeTuple(batch.get(j), tupleBuf.array(), tupleIndex * tupleSize);
+                        tuples[tupleIndex].resetByTupleOffset(tupleBuf, tupleIndex * tupleSize);
+                        skipList.add(tuples[tupleIndex]);
+                        tupleIndex++;
+                    }
+                }
+            } catch (Exception e) {
+                System.out.println(tupleIndex);
+                e.printStackTrace();
+            }
+        }
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/LSMTreeRunner.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/LSMTreeRunner.java
new file mode 100644
index 0000000..5d2185a
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/LSMTreeRunner.java
@@ -0,0 +1,173 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.perf;
+
+import java.io.File;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.control.nc.io.IOManager;
+import edu.uci.ics.hyracks.storage.am.btree.exceptions.BTreeException;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+import edu.uci.ics.hyracks.storage.am.common.datagen.TupleBatch;
+import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.impls.LSMBTree;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.util.LSMBTreeUtils;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.InMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.InMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.SynchronousScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ThreadCountingOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.HeapBufferAllocator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+import edu.uci.ics.hyracks.storage.common.file.TransientFileMapManager;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.test.support.TestUtils;
+
+public class LSMTreeRunner implements IExperimentRunner {
+
+    private static final int MAX_OPEN_FILES = 10000;
+    private static final int HYRACKS_FRAME_SIZE = 128;
+
+    protected IHyracksTaskContext ctx;
+    protected IOManager ioManager;
+    protected IBufferCache bufferCache;
+    protected int lsmtreeFileId;
+
+    protected final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
+    protected final static String sep = System.getProperty("file.separator");
+    protected final static String classDir = "/lsmtree/";
+    protected String onDiskDir;
+    protected FileReference file;
+
+    protected final int numBatches;
+    protected final LSMBTree lsmtree;
+    protected final ILSMIOOperationScheduler ioScheduler;
+    protected IBufferCache memBufferCache;
+    private final int onDiskPageSize;
+    private final int onDiskNumPages;
+
+    public LSMTreeRunner(int numBatches, int inMemPageSize, int inMemNumPages, int onDiskPageSize, int onDiskNumPages,
+            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories, int[] bloomFilterKeyFields)
+            throws BTreeException, HyracksException {
+        this.numBatches = numBatches;
+
+        this.onDiskPageSize = onDiskPageSize;
+        this.onDiskNumPages = onDiskNumPages;
+
+        onDiskDir = classDir + sep + simpleDateFormat.format(new Date()) + sep;
+        file = new FileReference(new File(onDiskDir));
+        ctx = TestUtils.create(HYRACKS_FRAME_SIZE);
+
+        TestStorageManagerComponentHolder.init(this.onDiskPageSize, this.onDiskNumPages, MAX_OPEN_FILES);
+        bufferCache = TestStorageManagerComponentHolder.getBufferCache(ctx);
+        ioManager = TestStorageManagerComponentHolder.getIOManager();
+        IFileMapProvider fmp = TestStorageManagerComponentHolder.getFileMapProvider(ctx);
+
+        IInMemoryBufferCache memBufferCache = new InMemoryBufferCache(new HeapBufferAllocator(), inMemPageSize,
+                inMemNumPages, new TransientFileMapManager());
+        IInMemoryFreePageManager memFreePageManager = new InMemoryFreePageManager(inMemNumPages,
+                new LIFOMetaDataFrameFactory());
+        this.ioScheduler = SynchronousScheduler.INSTANCE;
+        lsmtree = LSMBTreeUtils.createLSMTree(memBufferCache, memFreePageManager, ioManager, file, bufferCache, fmp,
+                typeTraits, cmpFactories, bloomFilterKeyFields, NoMergePolicy.INSTANCE,
+                ThreadCountingOperationTrackerFactory.INSTANCE, ioScheduler, NoOpIOOperationCallback.INSTANCE);
+    }
+
+    @Override
+    public void init() throws Exception {
+    }
+
+    @Override
+    public long runExperiment(DataGenThread dataGen, int numThreads) throws Exception {
+        LSMTreeThread[] threads = new LSMTreeThread[numThreads];
+        int threadNumBatches = numBatches / numThreads;
+        for (int i = 0; i < numThreads; i++) {
+            threads[i] = new LSMTreeThread(dataGen, lsmtree, threadNumBatches);
+        }
+        // Wait until the tupleBatchQueue is completely full.
+        while (dataGen.tupleBatchQueue.remainingCapacity() != 0) {
+            Thread.sleep(10);
+        }
+
+        long start = System.currentTimeMillis();
+        for (int i = 0; i < numThreads; i++) {
+            threads[i].start();
+        }
+        for (int i = 0; i < numThreads; i++) {
+            threads[i].join();
+        }
+        long end = System.currentTimeMillis();
+        long time = end - start;
+        return time;
+    }
+
+    @Override
+    public void reset() throws Exception {
+        lsmtree.create();
+    }
+
+    @Override
+    public void deinit() throws Exception {
+        bufferCache.closeFile(lsmtreeFileId);
+        bufferCache.close();
+        memBufferCache.closeFile(lsmtreeFileId);
+        memBufferCache.close();
+    }
+
+    public class LSMTreeThread extends Thread {
+        private final DataGenThread dataGen;
+        private final int numBatches;
+        private final IIndexAccessor lsmTreeAccessor;
+
+        public LSMTreeThread(DataGenThread dataGen, LSMBTree lsmTree, int numBatches) {
+            this.dataGen = dataGen;
+            this.numBatches = numBatches;
+            lsmTreeAccessor = lsmTree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        }
+
+        @Override
+        public void run() {
+            try {
+                for (int i = 0; i < numBatches; i++) {
+                    TupleBatch batch = dataGen.tupleBatchQueue.take();
+                    for (int j = 0; j < batch.size(); j++) {
+                        try {
+                            lsmTreeAccessor.insert(batch.get(j));
+                        } catch (TreeIndexException e) {
+                        }
+                    }
+                }
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/PerfExperiment.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/PerfExperiment.java
new file mode 100644
index 0000000..c842191
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/perf/PerfExperiment.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.perf;
+
+import java.util.Enumeration;
+import java.util.logging.Level;
+import java.util.logging.LogManager;
+import java.util.logging.Logger;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+
+public class PerfExperiment {
+    public static void main(String[] args) throws Exception {
+        // Disable logging so we can better see the output times.
+        Enumeration<String> loggers = LogManager.getLogManager().getLoggerNames();
+        while(loggers.hasMoreElements()) {
+            String loggerName = loggers.nextElement();
+            Logger logger = LogManager.getLogManager().getLogger(loggerName);
+            logger.setLevel(Level.OFF);
+        }
+        
+        int numTuples = 100000; // 100K
+        //int numTuples = 1000000; // 1M
+        //int numTuples = 2000000; // 2M
+        //int numTuples = 3000000; // 3M
+        //int numTuples = 10000000; // 10M
+        //int numTuples = 20000000; // 20M
+        //int numTuples = 30000000; // 30M
+        //int numTuples = 40000000; // 40M
+        //int numTuples = 60000000; // 60M
+        //int numTuples = 100000000; // 100M
+        //int numTuples = 200000000; // 200M
+        int batchSize = 10000;
+        int numBatches = numTuples / batchSize;
+        
+        ISerializerDeserializer[] fieldSerdes = new ISerializerDeserializer[] { IntegerSerializerDeserializer.INSTANCE };
+        ITypeTraits[] typeTraits = SerdeUtils.serdesToTypeTraits(fieldSerdes, 30);
+        
+        IBinaryComparatorFactory[] cmpFactories = SerdeUtils.serdesToComparatorFactories(fieldSerdes, fieldSerdes.length);
+        
+        //int repeats = 1000;
+        int repeats = 1;
+        long[] times = new long[repeats];
+
+        int numThreads = 2;
+        for (int i = 0; i < repeats; i++) {
+            //ConcurrentSkipListRunner runner = new ConcurrentSkipListRunner(numBatches, batchSize, tupleSize, typeTraits, cmp);
+            InMemoryBTreeRunner runner = new InMemoryBTreeRunner(numBatches, 8192, 100000, typeTraits, cmpFactories);
+            //BTreeBulkLoadRunner runner = new BTreeBulkLoadRunner(numBatches, 8192, 100000, typeTraits, cmp, 1.0f);
+        	//BTreeRunner runner = new BTreeRunner(numBatches, 8192, 100000, typeTraits, cmp);
+        	//String btreeName = "071211";
+        	//BTreeSearchRunner runner = new BTreeSearchRunner(btreeName, 10, numBatches, 8192, 25000, typeTraits, cmp);
+        	//LSMTreeRunner runner = new LSMTreeRunner(numBatches, 8192, 100, 8192, 250, typeTraits, cmp);
+        	//LSMTreeSearchRunner runner = new LSMTreeSearchRunner(100000, numBatches, 8192, 24750, 8192, 250, typeTraits, cmp); 
+            DataGenThread dataGen = new DataGenThread(numThreads, numBatches, batchSize, fieldSerdes, 30, 50, 10, false);
+            dataGen.start();
+            runner.reset();
+            times[i] = runner.runExperiment(dataGen, numThreads);
+            System.out.println("TIME " + i + ": " + times[i] + "ms");
+            runner.deinit();
+        }
+        long avgTime = 0;
+        for (int i = 0; i < repeats; i++) {
+            avgTime += times[i];
+        }
+        avgTime /= repeats;
+        System.out.println("AVG TIME: " + avgTime + "ms");
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeTuplesTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeTuplesTest.java
new file mode 100644
index 0000000..ce6c27c
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/tuples/LSMBTreeTuplesTest.java
@@ -0,0 +1,171 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.tuples;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+import java.util.Random;
+
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenUtils;
+import edu.uci.ics.hyracks.storage.am.common.datagen.IFieldValueGenerator;
+
+@SuppressWarnings("rawtypes")
+public class LSMBTreeTuplesTest {
+
+    private final Random rnd = new Random(50);
+    
+    private ByteBuffer writeTuple(ITupleReference tuple, LSMBTreeTupleWriter tupleWriter) {
+        // Write tuple into a buffer, then later try to read it.
+        int bytesRequired = tupleWriter.bytesRequired(tuple);
+        byte[] bytes = new byte[bytesRequired];
+        ByteBuffer targetBuf = ByteBuffer.wrap(bytes);
+        tupleWriter.writeTuple(tuple, bytes, 0);
+        return targetBuf;
+    }
+    
+    private void testLSMBTreeTuple(ISerializerDeserializer[] maxFieldSerdes) throws HyracksDataException {        
+        // Create a tuple with the max-1 fields for checking setFieldCount() of tuple references later.
+        ITypeTraits[] maxTypeTraits = SerdeUtils.serdesToTypeTraits(maxFieldSerdes); 
+        IFieldValueGenerator[] maxFieldGens = DataGenUtils.getFieldGensFromSerdes(maxFieldSerdes, rnd, false);
+        // Generate a tuple with random field values.
+        Object[] maxFields = new Object[maxFieldSerdes.length];
+        for (int j = 0; j < maxFieldSerdes.length; j++) {
+            maxFields[j] = maxFieldGens[j].next();
+        }            
+        
+        // Run test for varying number of fields and keys.
+        for (int numKeyFields = 1; numKeyFields < maxFieldSerdes.length; numKeyFields++) {
+            // Create tuples with varying number of fields, and try to interpret their bytes with the lsmBTreeTuple.
+            for (int numFields = numKeyFields; numFields <= maxFieldSerdes.length; numFields++) {                
+                // Create and write tuple to bytes using an LSMBTreeTupleWriter.
+                LSMBTreeTupleWriter maxMatterTupleWriter = new LSMBTreeTupleWriter(maxTypeTraits, numKeyFields, false);
+                ITupleReference maxTuple = TupleUtils.createTuple(maxFieldSerdes, (Object[])maxFields);
+                ByteBuffer maxMatterBuf = writeTuple(maxTuple, maxMatterTupleWriter);
+                // Tuple reference should work for both matter and antimatter tuples (doesn't matter which factory creates it).
+                LSMBTreeTupleReference maxLsmBTreeTuple = (LSMBTreeTupleReference) maxMatterTupleWriter.createTupleReference();
+                
+                ISerializerDeserializer[] fieldSerdes = Arrays.copyOfRange(maxFieldSerdes, 0, numFields);
+                ITypeTraits[] typeTraits = SerdeUtils.serdesToTypeTraits(fieldSerdes);                
+                IFieldValueGenerator[] fieldGens = DataGenUtils.getFieldGensFromSerdes(fieldSerdes, rnd, false);
+                // Generate a tuple with random field values.
+                Object[] fields = new Object[numFields];
+                for (int j = 0; j < numFields; j++) {
+                    fields[j] = fieldGens[j].next();
+                }            
+                // Create and write tuple to bytes using an LSMBTreeTupleWriter.
+                ITupleReference tuple = TupleUtils.createTuple(fieldSerdes, (Object[])fields);
+                LSMBTreeTupleWriter matterTupleWriter = new LSMBTreeTupleWriter(typeTraits, numKeyFields, false);
+                LSMBTreeTupleWriter antimatterTupleWriter = new LSMBTreeTupleWriter(typeTraits, numKeyFields, true);
+                LSMBTreeCopyTupleWriter copyTupleWriter = new LSMBTreeCopyTupleWriter(typeTraits, numKeyFields);
+                ByteBuffer matterBuf = writeTuple(tuple, matterTupleWriter);
+                ByteBuffer antimatterBuf = writeTuple(tuple, antimatterTupleWriter);
+
+                // The antimatter buf should only contain keys, sanity check the size.
+                if (numFields != numKeyFields) {
+                    assertTrue(antimatterBuf.array().length < matterBuf.array().length);
+                }
+
+                // Tuple reference should work for both matter and antimatter tuples (doesn't matter which factory creates it).
+                LSMBTreeTupleReference lsmBTreeTuple = (LSMBTreeTupleReference) matterTupleWriter.createTupleReference();                
+                
+                // Use LSMBTree tuple reference to interpret the written tuples.
+                // Repeat the block inside to test that repeated resetting to matter/antimatter tuples works.
+                for (int r = 0; r < 4; r++) {
+                    
+                    // Check matter tuple with lsmBTreeTuple.
+                    lsmBTreeTuple.resetByTupleOffset(matterBuf, 0);
+                    checkTuple(lsmBTreeTuple, numFields, false, fieldSerdes, fields);
+                    
+                    // Create a copy using copyTupleWriter, and verify again.
+                    ByteBuffer copyMatterBuf = writeTuple(lsmBTreeTuple, copyTupleWriter);
+                    lsmBTreeTuple.resetByTupleOffset(copyMatterBuf, 0);
+                    checkTuple(lsmBTreeTuple, numFields, false, fieldSerdes, fields);
+                    
+                    // Check antimatter tuple with lsmBTreeTuple.
+                    lsmBTreeTuple.resetByTupleOffset(antimatterBuf, 0);                                        
+                    // Should only contain keys.
+                    checkTuple(lsmBTreeTuple, numKeyFields, true, fieldSerdes, fields);
+                    
+                    // Create a copy using copyTupleWriter, and verify again.
+                    ByteBuffer copyAntimatterBuf = writeTuple(lsmBTreeTuple, copyTupleWriter);
+                    lsmBTreeTuple.resetByTupleOffset(copyAntimatterBuf, 0);
+                    // Should only contain keys.
+                    checkTuple(lsmBTreeTuple, numKeyFields, true, fieldSerdes, fields);
+                    
+                    // Check matter tuple with maxLsmBTreeTuple.
+                    // We should be able to manually set a prefix of the fields 
+                    // (the passed type traits in the tuple factory's constructor).
+                    maxLsmBTreeTuple.setFieldCount(numFields);
+                    maxLsmBTreeTuple.resetByTupleOffset(matterBuf, 0);
+                    checkTuple(maxLsmBTreeTuple, numFields, false, fieldSerdes, fields);
+                    
+                    // Check antimatter tuple with maxLsmBTreeTuple.
+                    maxLsmBTreeTuple.resetByTupleOffset(antimatterBuf, 0);
+                    // Should only contain keys.
+                    checkTuple(maxLsmBTreeTuple, numKeyFields, true, fieldSerdes, fields);
+                    
+                    // Resetting maxLsmBTreeTuple should set its field count to
+                    // maxFieldSerdes.length, based on the its type traits.
+                    maxLsmBTreeTuple.resetByTupleOffset(maxMatterBuf, 0);
+                    checkTuple(maxLsmBTreeTuple, maxFieldSerdes.length, false, maxFieldSerdes, maxFields);
+                }
+            }
+        }
+    }
+    
+    private void checkTuple(LSMBTreeTupleReference tuple, int expectedFieldCount, boolean expectedAntimatter, ISerializerDeserializer[] fieldSerdes, Object[] expectedFields) throws HyracksDataException {
+        assertEquals(expectedFieldCount, tuple.getFieldCount());
+        assertEquals(expectedAntimatter, tuple.isAntimatter());
+        Object[] deserMatterTuple = TupleUtils.deserializeTuple(tuple, fieldSerdes);
+        for (int j = 0; j < expectedFieldCount; j++) {
+            assertEquals(expectedFields[j], deserMatterTuple[j]);
+        }
+    }
+    
+    @Test
+    public void testLSMBTreeTuple() throws HyracksDataException {        
+        ISerializerDeserializer[] intFields = new IntegerSerializerDeserializer[] {
+                IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE };
+        testLSMBTreeTuple(intFields);
+        
+        ISerializerDeserializer[] stringFields = new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE };
+        testLSMBTreeTuple(stringFields);
+        
+        ISerializerDeserializer[] mixedFields = new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE };
+        testLSMBTreeTuple(mixedFields);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/util/LSMBTreeTestContext.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/util/LSMBTreeTestContext.java
new file mode 100644
index 0000000..f790fde
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/util/LSMBTreeTestContext.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.util;
+
+import java.util.Collection;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.control.nc.io.IOManager;
+import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.common.CheckTuple;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.btree.impls.LSMBTree;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+@SuppressWarnings("rawtypes")
+public final class LSMBTreeTestContext extends OrderedIndexTestContext {
+
+    public LSMBTreeTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) {
+        super(fieldSerdes, treeIndex);
+    }
+
+    @Override
+    public int getKeyFieldCount() {
+        LSMBTree lsmTree = (LSMBTree) index;
+        return lsmTree.getComparatorFactories().length;
+    }
+
+    @Override
+    public IBinaryComparatorFactory[] getComparatorFactories() {
+        LSMBTree lsmTree = (LSMBTree) index;
+        return lsmTree.getComparatorFactories();
+    }
+
+    /**
+     * Override to provide upsert semantics for the check tuples.
+     */
+    @Override
+    public void insertCheckTuple(CheckTuple checkTuple, Collection<CheckTuple> checkTuples) {
+        upsertCheckTuple(checkTuple, checkTuples);
+    }
+
+    public static LSMBTreeTestContext create(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IOManager ioManager, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ISerializerDeserializer[] fieldSerdes,
+            int numKeyFields, ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider)
+            throws Exception {
+        ITypeTraits[] typeTraits = SerdeUtils.serdesToTypeTraits(fieldSerdes);
+        IBinaryComparatorFactory[] cmpFactories = SerdeUtils.serdesToComparatorFactories(fieldSerdes, numKeyFields);
+        int[] bloomFilterKeyFields = new int[numKeyFields];
+        for (int i = 0; i < numKeyFields; ++i) {
+            bloomFilterKeyFields[i] = i;
+        }
+        LSMBTree lsmTree = LSMBTreeUtils.createLSMTree(memBufferCache, memFreePageManager, ioManager, file,
+                diskBufferCache, diskFileMapProvider, typeTraits, cmpFactories, bloomFilterKeyFields, mergePolicy,
+                opTrackerFactory, ioScheduler, ioOpCallbackProvider);
+        LSMBTreeTestContext testCtx = new LSMBTreeTestContext(fieldSerdes, lsmTree);
+        return testCtx;
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/util/LSMBTreeTestHarness.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/util/LSMBTreeTestHarness.java
new file mode 100644
index 0000000..9128607
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/btree/util/LSMBTreeTestHarness.java
@@ -0,0 +1,215 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.btree.util;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Random;
+import java.util.logging.Logger;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.control.nc.io.IOManager;
+import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeLeafFrameType;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.InMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.InMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.SynchronousScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ThreadCountingOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.HeapBufferAllocator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+import edu.uci.ics.hyracks.storage.common.file.TransientFileMapManager;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.test.support.TestUtils;
+
+public class LSMBTreeTestHarness {
+    protected static final Logger LOGGER = Logger.getLogger(LSMBTreeTestHarness.class.getName());
+
+    public static final BTreeLeafFrameType[] LEAF_FRAMES_TO_TEST = new BTreeLeafFrameType[] { BTreeLeafFrameType.REGULAR_NSM };
+
+    private static final long RANDOM_SEED = 50;
+
+    protected final int diskPageSize;
+    protected final int diskNumPages;
+    protected final int diskMaxOpenFiles;
+    protected final int memPageSize;
+    protected final int memNumPages;
+    protected final int hyracksFrameSize;
+
+    protected IOManager ioManager;
+    protected IBufferCache diskBufferCache;
+    protected IFileMapProvider diskFileMapProvider;
+    protected IInMemoryBufferCache memBufferCache;
+    protected IInMemoryFreePageManager memFreePageManager;
+    protected IHyracksTaskContext ctx;
+    protected ILSMIOOperationScheduler ioScheduler;
+    protected ILSMMergePolicy mergePolicy;
+    protected ILSMOperationTrackerFactory opTrackerFactory;
+    protected ILSMIOOperationCallbackProvider ioOpCallbackProvider;
+
+    protected final Random rnd = new Random();
+    protected final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
+    protected final static String sep = System.getProperty("file.separator");
+    protected String onDiskDir;
+    protected FileReference file;
+
+    public LSMBTreeTestHarness() {
+        this.diskPageSize = AccessMethodTestsConfig.LSM_BTREE_DISK_PAGE_SIZE;
+        this.diskNumPages = AccessMethodTestsConfig.LSM_BTREE_DISK_NUM_PAGES;
+        this.diskMaxOpenFiles = AccessMethodTestsConfig.LSM_BTREE_DISK_MAX_OPEN_FILES;
+        this.memPageSize = AccessMethodTestsConfig.LSM_BTREE_MEM_PAGE_SIZE;
+        this.memNumPages = AccessMethodTestsConfig.LSM_BTREE_MEM_NUM_PAGES;
+        this.hyracksFrameSize = AccessMethodTestsConfig.LSM_BTREE_HYRACKS_FRAME_SIZE;
+        this.ioScheduler = SynchronousScheduler.INSTANCE;
+        this.mergePolicy = NoMergePolicy.INSTANCE;
+        this.opTrackerFactory = ThreadCountingOperationTrackerFactory.INSTANCE;
+        this.ioOpCallbackProvider = NoOpIOOperationCallback.INSTANCE;
+    }
+
+    public LSMBTreeTestHarness(int diskPageSize, int diskNumPages, int diskMaxOpenFiles, int memPageSize,
+            int memNumPages, int hyracksFrameSize) {
+        this.diskPageSize = diskPageSize;
+        this.diskNumPages = diskNumPages;
+        this.diskMaxOpenFiles = diskMaxOpenFiles;
+        this.memPageSize = memPageSize;
+        this.memNumPages = memNumPages;
+        this.hyracksFrameSize = hyracksFrameSize;
+        this.ioScheduler = SynchronousScheduler.INSTANCE;
+        this.mergePolicy = NoMergePolicy.INSTANCE;
+        this.opTrackerFactory = ThreadCountingOperationTrackerFactory.INSTANCE;
+    }
+
+    public void setUp() throws HyracksException {
+        onDiskDir = "lsm_btree_" + simpleDateFormat.format(new Date()) + sep;
+        file = new FileReference(new File(onDiskDir));
+        ctx = TestUtils.create(getHyracksFrameSize());
+        TestStorageManagerComponentHolder.init(diskPageSize, diskNumPages, diskMaxOpenFiles);
+        diskBufferCache = TestStorageManagerComponentHolder.getBufferCache(ctx);
+        diskFileMapProvider = TestStorageManagerComponentHolder.getFileMapProvider(ctx);
+        memBufferCache = new InMemoryBufferCache(new HeapBufferAllocator(), memPageSize, memNumPages,
+                new TransientFileMapManager());
+        memFreePageManager = new InMemoryFreePageManager(memNumPages, new LIFOMetaDataFrameFactory());
+        ioManager = TestStorageManagerComponentHolder.getIOManager();
+        rnd.setSeed(RANDOM_SEED);
+    }
+
+    public void tearDown() throws HyracksDataException {
+        diskBufferCache.close();
+        for (IODeviceHandle dev : ioManager.getIODevices()) {
+            File dir = new File(dev.getPath(), onDiskDir);
+            FilenameFilter filter = new FilenameFilter() {
+                public boolean accept(File dir, String name) {
+                    return !name.startsWith(".");
+                }
+            };
+            String[] files = dir.list(filter);
+            if (files != null) {
+                for (String fileName : files) {
+                    File file = new File(dir.getPath() + File.separator + fileName);
+                    file.delete();
+                }
+            }
+            dir.delete();
+        }
+    }
+
+    public int getDiskPageSize() {
+        return diskPageSize;
+    }
+
+    public int getDiskNumPages() {
+        return diskNumPages;
+    }
+
+    public int getDiskMaxOpenFiles() {
+        return diskMaxOpenFiles;
+    }
+
+    public int getMemPageSize() {
+        return memPageSize;
+    }
+
+    public int getMemNumPages() {
+        return memNumPages;
+    }
+
+    public int getHyracksFrameSize() {
+        return hyracksFrameSize;
+    }
+
+    public IOManager getIOManager() {
+        return ioManager;
+    }
+
+    public IBufferCache getDiskBufferCache() {
+        return diskBufferCache;
+    }
+
+    public IFileMapProvider getDiskFileMapProvider() {
+        return diskFileMapProvider;
+    }
+
+    public IInMemoryBufferCache getMemBufferCache() {
+        return memBufferCache;
+    }
+
+    public IInMemoryFreePageManager getMemFreePageManager() {
+        return memFreePageManager;
+    }
+
+    public IHyracksTaskContext getHyracksTastContext() {
+        return ctx;
+    }
+
+    public FileReference getFileReference() {
+        return file;
+    }
+
+    public Random getRandom() {
+        return rnd;
+    }
+
+    public ILSMIOOperationScheduler getIOScheduler() {
+        return ioScheduler;
+    }
+
+    public ILSMOperationTrackerFactory getOperationTrackerFactory() {
+        return opTrackerFactory;
+    }
+
+    public ILSMMergePolicy getMergePolicy() {
+        return mergePolicy;
+    }
+
+    public ILSMIOOperationCallbackProvider getIOOperationCallbackProvider() {
+        return ioOpCallbackProvider;
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/pom.xml b/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/pom.xml
new file mode 100644
index 0000000..68b432b
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/pom.xml
@@ -0,0 +1,40 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <artifactId>hyracks-storage-am-lsm-common-test</artifactId>
+
+  <parent>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks-tests</artifactId>
+    <version>0.2.5-SNAPSHOT</version>
+  </parent>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.0.2</version>
+        <configuration>
+          <source>1.7</source>
+          <target>1.7</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>  	
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-lsm-common</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-test-support</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  </dependencies>
+</project>
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/DummyLSMIndexFileManager.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/DummyLSMIndexFileManager.java
new file mode 100644
index 0000000..69e23bc
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/DummyLSMIndexFileManager.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.util.ArrayList;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractLSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class DummyLSMIndexFileManager extends AbstractLSMIndexFileManager {
+
+    public DummyLSMIndexFileManager(IIOManager ioManager, IFileMapProvider fileMapProvider, FileReference file,
+            TreeIndexFactory<? extends ITreeIndex> treeFactory) {
+        super(ioManager, fileMapProvider, file, treeFactory, 0);
+    }
+
+    protected void cleanupAndGetValidFilesInternal(IODeviceHandle dev, FilenameFilter filter,
+            TreeIndexFactory<? extends ITreeIndex> treeFactory, ArrayList<ComparableFileName> allFiles)
+            throws HyracksDataException, IndexException {
+        File dir = new File(dev.getPath(), baseDir);
+        String[] files = dir.list(filter);
+        for (String fileName : files) {
+            File file = new File(dir.getPath() + File.separator + fileName);
+            FileReference fileRef = new FileReference(file);
+            allFiles.add(new ComparableFileName(fileRef));
+        }
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/DummyTreeFactory.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/DummyTreeFactory.java
new file mode 100644
index 0000000..8b22771
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/DummyTreeFactory.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common;
+
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.TreeIndexFactory;
+
+public class DummyTreeFactory extends TreeIndexFactory<ITreeIndex> {
+
+    public DummyTreeFactory() {
+        super(null, null, null, null, null, null, 0);
+    }
+
+    @Override
+    public ITreeIndex createIndexInstance(FileReference file) throws IndexException {
+        return null;
+    }
+
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/InMemoryBufferCacheTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/InMemoryBufferCacheTest.java
new file mode 100644
index 0000000..adba93d
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/InMemoryBufferCacheTest.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+import java.util.HashSet;
+
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.InMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.HeapBufferAllocator;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
+import edu.uci.ics.hyracks.storage.common.file.BufferedFileHandle;
+import edu.uci.ics.hyracks.storage.common.file.TransientFileMapManager;
+
+public class InMemoryBufferCacheTest {
+    private static final int PAGE_SIZE = 256;
+    private static final int NUM_PAGES = 100;
+    private HashSet<ICachedPage> pinnedPages = new HashSet<ICachedPage>();
+
+    @Test
+    public void test01() throws Exception {
+        InMemoryBufferCache memBufferCache = new InMemoryBufferCache(new HeapBufferAllocator(), PAGE_SIZE, NUM_PAGES,
+                new TransientFileMapManager());
+        memBufferCache.open();
+        int dummyFileId = 0;
+        // Pin all pages, and make sure they return unique ICachedPages.
+        // We expect no overflow pages.
+        for (int i = 0; i < NUM_PAGES; i++) {
+            ICachedPage page = memBufferCache.pin(BufferedFileHandle.getDiskPageId(dummyFileId, i), false);
+            if (pinnedPages.contains(page)) {
+                fail("Id collision for ICachedPage, caused by id: " + i);
+            }
+            pinnedPages.add(page);
+            assertEquals(0, memBufferCache.getNumOverflowPages());
+        }
+        // Pin pages above capacity. We expect to be given new overflow pages.
+        // Going above capacity should be very rare, but nevertheless succeed.
+        for (int i = 0; i < 100; i++) {
+            ICachedPage page = memBufferCache.pin(BufferedFileHandle.getDiskPageId(dummyFileId, i + NUM_PAGES), false);
+            if (pinnedPages.contains(page)) {
+                fail("Id collision for ICachedPage, caused by overflow id: " + i);
+            }
+            pinnedPages.add(page);
+            assertEquals(i + 1, memBufferCache.getNumOverflowPages());
+        }
+        memBufferCache.close();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/InMemoryFreePageManagerTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/InMemoryFreePageManagerTest.java
new file mode 100644
index 0000000..bd09a3f
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/InMemoryFreePageManagerTest.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.InMemoryFreePageManager;
+
+public class InMemoryFreePageManagerTest {
+
+    private final int NUM_PAGES = 100;
+    
+    private void testInMemoryFreePageManager(InMemoryFreePageManager memFreePageManager) throws HyracksDataException {
+        // The first two pages are reserved for the BTree's metadata page and
+        // root page.
+        // The "actual" capacity is therefore numPages - 2.
+        int capacity = memFreePageManager.getCapacity();
+        assertEquals(capacity, NUM_PAGES - 2);
+        for (int i = 0; i < capacity; i++) {
+            int pageId = memFreePageManager.getFreePage(null);
+            // The free pages start from page 2;
+            assertEquals(i + 2, pageId);
+            assertFalse(memFreePageManager.isFull());
+        }
+        // Start asking for 100 pages above the capacity.
+        // Asking for pages above the capacity should be very rare, but
+        // nevertheless succeed.
+        // We expect isFull() to return true.
+        for (int i = 0; i < 100; i++) {
+            int pageId = memFreePageManager.getFreePage(null);
+            assertEquals(capacity + i + 2, pageId);
+            assertTrue(memFreePageManager.isFull());
+        }
+    }
+    
+    @Test
+    public void test01() throws HyracksDataException {
+        ITreeIndexMetaDataFrameFactory metaFrameFactory = new LIFOMetaDataFrameFactory();
+        InMemoryFreePageManager memFreePageManager = new InMemoryFreePageManager(NUM_PAGES, metaFrameFactory);
+        testInMemoryFreePageManager(memFreePageManager);
+        // We expect exactly the same behavior after a reset().
+        memFreePageManager.reset();
+        testInMemoryFreePageManager(memFreePageManager);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/LSMIndexFileManagerTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/LSMIndexFileManagerTest.java
new file mode 100644
index 0000000..161f4ce
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/common/LSMIndexFileManagerTest.java
@@ -0,0 +1,274 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.common;
+
+import static org.junit.Assert.assertEquals;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.concurrent.Executors;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.control.nc.io.IOManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexFileManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+
+public class LSMIndexFileManagerTest {
+    private static final int DEFAULT_PAGE_SIZE = 256;
+    private static final int DEFAULT_NUM_PAGES = 100;
+    private static final int DEFAULT_MAX_OPEN_FILES = 10;
+    protected final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
+    protected final static String sep = System.getProperty("file.separator");
+    protected IOManager ioManager;
+    protected IFileMapProvider fileMapProvider;
+    protected String baseDir;
+    protected FileReference file;
+
+    @Before
+    public void setUp() throws HyracksException {
+        TestStorageManagerComponentHolder.init(DEFAULT_PAGE_SIZE, DEFAULT_NUM_PAGES, DEFAULT_MAX_OPEN_FILES);
+        ioManager = TestStorageManagerComponentHolder.getIOManager();
+        fileMapProvider = TestStorageManagerComponentHolder.getFileMapProvider(null);
+        baseDir = "lsm_tree" + simpleDateFormat.format(new Date()) + sep;
+        File f = new File(baseDir);
+        f.mkdirs();
+        file = new FileReference(f);
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        File f = new File(baseDir);
+        f.deleteOnExit();
+    }
+
+    public void sortOrderTest(boolean testFlushFileName) throws InterruptedException, HyracksDataException {
+        ILSMIndexFileManager fileManager = new DummyLSMIndexFileManager(ioManager, fileMapProvider, file,
+                new DummyTreeFactory());
+        LinkedList<String> fileNames = new LinkedList<String>();
+
+        int numFileNames = 100;
+        long sleepTime = 5;
+        for (int i = 0; i < numFileNames; i++) {
+            String flushFileName = (String) fileManager.getRelFlushFileReference().getInsertIndexFileReference()
+                    .getFile().getName();
+            if (testFlushFileName) {
+                fileNames.addFirst(flushFileName);
+            }
+            Thread.sleep(sleepTime);
+            if (!testFlushFileName) {
+                String secondFlushFileName = (String) fileManager.getRelFlushFileReference()
+                        .getInsertIndexFileReference().getFile().getName();
+                String mergeFileName = getMergeFileName(fileManager, flushFileName, secondFlushFileName);
+                fileNames.addFirst(mergeFileName);
+                Thread.sleep(sleepTime);
+            }
+        }
+
+        List<String> sortedFileNames = new ArrayList<String>();
+        sortedFileNames.addAll(fileNames);
+
+        // Make sure the comparator sorts in the correct order (i.e., the
+        // reverse insertion order in this case).
+        Comparator<String> cmp = fileManager.getFileNameComparator();
+        Collections.sort(sortedFileNames, cmp);
+        for (int i = 0; i < numFileNames; i++) {
+            assertEquals(fileNames.get(i), sortedFileNames.get(i));
+        }
+    }
+
+    @Test
+    public void flushAndMergeFilesSortOrderTest() throws InterruptedException, HyracksDataException {
+        sortOrderTest(true);
+        sortOrderTest(false);
+    }
+
+    public void cleanInvalidFilesTest(IOManager ioManager) throws InterruptedException, IOException, IndexException {
+        ILSMIndexFileManager fileManager = new DummyLSMIndexFileManager(ioManager, fileMapProvider, file,
+                new DummyTreeFactory());
+        fileManager.createDirs();
+
+        List<FileReference> flushFiles = new ArrayList<FileReference>();
+        List<FileReference> allFiles = new ArrayList<FileReference>();
+
+        int numFileNames = 100;
+        long sleepTime = 5;
+        // Generate a bunch of flush files.
+        for (int i = 0; i < numFileNames; i++) {
+            LSMComponentFileReferences relFlushFileRefs = fileManager.getRelFlushFileReference();
+            flushFiles.add(relFlushFileRefs.getInsertIndexFileReference());
+            Thread.sleep(sleepTime);
+        }
+        allFiles.addAll(flushFiles);
+
+        // Simulate merging some of the flush files.
+        // Merge range 0 to 4.
+        FileReference mergeFile1 = simulateMerge(fileManager, flushFiles.get(0), flushFiles.get(4));
+        allFiles.add(mergeFile1);
+        // Merge range 5 to 9.
+        FileReference mergeFile2 = simulateMerge(fileManager, flushFiles.get(5), flushFiles.get(9));
+        allFiles.add(mergeFile2);
+        // Merge range 10 to 19.
+        FileReference mergeFile3 = simulateMerge(fileManager, flushFiles.get(10), flushFiles.get(19));
+        allFiles.add(mergeFile3);
+        // Merge range 20 to 29.
+        FileReference mergeFile4 = simulateMerge(fileManager, flushFiles.get(20), flushFiles.get(29));
+        allFiles.add(mergeFile4);
+        // Merge range 50 to 79.
+        FileReference mergeFile5 = simulateMerge(fileManager, flushFiles.get(50), flushFiles.get(79));
+        allFiles.add(mergeFile5);
+
+        // Simulate merging of merge files.
+        FileReference mergeFile6 = simulateMerge(fileManager, mergeFile1, mergeFile2);
+        allFiles.add(mergeFile6);
+        FileReference mergeFile7 = simulateMerge(fileManager, mergeFile3, mergeFile4);
+        allFiles.add(mergeFile7);
+
+        // Create all files and set delete on exit for all files.
+        for (FileReference fileRef : allFiles) {
+            fileRef.getFile().createNewFile();
+            fileRef.getFile().deleteOnExit();
+        }
+
+        // Populate expected valid flush files.
+        List<String> expectedValidFiles = new ArrayList<String>();
+        for (int i = 30; i < 50; i++) {
+            expectedValidFiles.add(flushFiles.get(i).getFile().getName());
+        }
+        for (int i = 80; i < 100; i++) {
+            expectedValidFiles.add(flushFiles.get(i).getFile().getName());
+        }
+
+        // Populate expected valid merge files.
+        expectedValidFiles.add(mergeFile5.getFile().getName());
+        expectedValidFiles.add(mergeFile6.getFile().getName());
+        expectedValidFiles.add(mergeFile7.getFile().getName());
+
+        // Sort expected files.
+        Collections.sort(expectedValidFiles, fileManager.getFileNameComparator());
+
+        // Pass null and a dummy component finalizer. We don't test for physical consistency in this test.
+        List<LSMComponentFileReferences> lsmComonentFileReference = fileManager.cleanupAndGetValidFiles();
+
+        // Check actual files against expected files.
+        assertEquals(expectedValidFiles.size(), lsmComonentFileReference.size());
+        for (int i = 0; i < expectedValidFiles.size(); i++) {
+            assertEquals(expectedValidFiles.get(i), lsmComonentFileReference.get(i).getInsertIndexFileReference()
+                    .getFile().getName());
+        }
+
+        // Make sure invalid files were removed from all IODevices.
+        ArrayList<String> remainingFiles = new ArrayList<String>();
+        for (IODeviceHandle dev : ioManager.getIODevices()) {
+            File dir = new File(dev.getPath(), baseDir);
+            FilenameFilter filter = new FilenameFilter() {
+                public boolean accept(File dir, String name) {
+                    return !name.startsWith(".");
+                }
+            };
+            String[] files = dir.list(filter);
+            for (String file : files) {
+                File f = new File(file);
+                remainingFiles.add(f.getName());
+            }
+        }
+
+        Collections.sort(remainingFiles, fileManager.getFileNameComparator());
+        // Check actual files in directory against expected files.
+        assertEquals(expectedValidFiles.size(), remainingFiles.size());
+        for (int i = 0; i < expectedValidFiles.size(); i++) {
+            assertEquals(expectedValidFiles.get(i), remainingFiles.get(i));
+        }
+    }
+
+    @Test
+    public void singleIODeviceTest() throws InterruptedException, IOException, IndexException {
+        IOManager singleDeviceIOManager = createIOManager(1);
+        cleanInvalidFilesTest(singleDeviceIOManager);
+        cleanDirs(singleDeviceIOManager);
+    }
+
+    @Test
+    public void twoIODevicesTest() throws InterruptedException, IOException, IndexException {
+        IOManager twoDevicesIOManager = createIOManager(2);
+        cleanInvalidFilesTest(twoDevicesIOManager);
+        cleanDirs(twoDevicesIOManager);
+    }
+
+    @Test
+    public void fourIODevicesTest() throws InterruptedException, IOException, IndexException {
+        IOManager fourDevicesIOManager = createIOManager(4);
+        cleanInvalidFilesTest(fourDevicesIOManager);
+        cleanDirs(fourDevicesIOManager);
+    }
+
+    private void cleanDirs(IOManager ioManager) {
+        for (IODeviceHandle dev : ioManager.getIODevices()) {
+            File dir = new File(dev.getPath(), baseDir);
+            FilenameFilter filter = new FilenameFilter() {
+                public boolean accept(File dir, String name) {
+                    return !name.startsWith(".");
+                }
+            };
+            String[] files = dir.list(filter);
+            for (String file : files) {
+                File f = new File(file);
+                f.delete();
+            }
+        }
+    }
+
+    private IOManager createIOManager(int numDevices) throws HyracksException {
+        List<IODeviceHandle> devices = new ArrayList<IODeviceHandle>();
+        for (int i = 0; i < numDevices; i++) {
+            String iodevPath = System.getProperty("java.io.tmpdir") + sep + "test_iodev" + i;
+            devices.add(new IODeviceHandle(new File(iodevPath), "wa"));
+        }
+        return new IOManager(devices, Executors.newCachedThreadPool());
+    }
+
+    private FileReference simulateMerge(ILSMIndexFileManager fileManager, FileReference a, FileReference b)
+            throws HyracksDataException {
+        LSMComponentFileReferences relMergeFileRefs = fileManager.getRelMergeFileReference(a.getFile().getName(), b
+                .getFile().getName());
+        return relMergeFileRefs.getInsertIndexFileReference();
+    }
+
+    private String getMergeFileName(ILSMIndexFileManager fileNameManager, String firstFile, String lastFile)
+            throws HyracksDataException {
+        File f1 = new File(firstFile);
+        File f2 = new File(lastFile);
+        return (String) fileNameManager.getRelMergeFileReference(f1.getName(), f2.getName())
+                .getInsertIndexFileReference().getFile().getName();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/pom.xml b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/pom.xml
new file mode 100644
index 0000000..273b90f
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/pom.xml
@@ -0,0 +1,49 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<artifactId>hyracks-storage-am-lsm-invertedindex-test</artifactId>
+
+	<parent>
+		<artifactId>hyracks-tests</artifactId>
+		<groupId>edu.uci.ics.hyracks</groupId>
+		<version>0.2.5-SNAPSHOT</version>
+		<relativePath>..</relativePath>
+	</parent>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>2.0.2</version>
+				<configuration>
+					<source>1.7</source>
+					<target>1.7</target>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+	<dependencies>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-storage-am-lsm-invertedindex</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-test-support</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-data-std</artifactId>
+			<version>0.2.5-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+</project>
\ No newline at end of file
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexBulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexBulkLoadTest.java
new file mode 100644
index 0000000..fcb78ad
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexBulkLoadTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexLoadTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class LSMInvertedIndexBulkLoadTest extends AbstractInvertedIndexLoadTest {
+
+    public LSMInvertedIndexBulkLoadTest() {
+        super(InvertedIndexType.LSM, true, 1);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexDeleteTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexDeleteTest.java
new file mode 100644
index 0000000..4e2fe37
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexDeleteTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexDeleteTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class LSMInvertedIndexDeleteTest extends AbstractInvertedIndexDeleteTest {
+
+    public LSMInvertedIndexDeleteTest() {
+        super(InvertedIndexType.LSM, false);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexInsertTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexInsertTest.java
new file mode 100644
index 0000000..e9a1c75
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexInsertTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexLoadTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class LSMInvertedIndexInsertTest extends AbstractInvertedIndexLoadTest {
+
+    public LSMInvertedIndexInsertTest() {
+        super(InvertedIndexType.LSM, false, 1);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexMergeTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexMergeTest.java
new file mode 100644
index 0000000..811919b
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexMergeTest.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex;
+
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.TupleGenerator;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexLoadTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestUtils;
+
+public class LSMInvertedIndexMergeTest extends AbstractInvertedIndexLoadTest {
+
+    private final int maxTreesToMerge = AccessMethodTestsConfig.LSM_INVINDEX_MAX_TREES_TO_MERGE;
+
+    public LSMInvertedIndexMergeTest() {
+        super(InvertedIndexType.LSM, true, 1);
+    }
+
+    @Override
+    protected void runTest(LSMInvertedIndexTestContext testCtx, TupleGenerator tupleGen) throws IOException,
+            IndexException {
+        IIndex invIndex = testCtx.getIndex();
+        invIndex.create();
+        invIndex.activate();
+        ILSMIndexAccessor invIndexAccessor = (ILSMIndexAccessor) invIndex.createAccessor(
+                NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+
+        for (int i = 0; i < maxTreesToMerge; i++) {
+            for (int j = 0; j < i; j++) {
+                if (bulkLoad) {
+                    LSMInvertedIndexTestUtils.bulkLoadInvIndex(testCtx, tupleGen, NUM_DOCS_TO_INSERT);
+                } else {
+                    LSMInvertedIndexTestUtils.insertIntoInvIndex(testCtx, tupleGen, NUM_DOCS_TO_INSERT);
+                }
+            }
+            // Perform merge.
+            invIndexAccessor.scheduleMerge(NoOpIOOperationCallback.INSTANCE);
+            validateAndCheckIndex(testCtx);
+            runTinySearchWorkload(testCtx, tupleGen);
+        }
+
+        invIndex.deactivate();
+        invIndex.destroy();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexMultiBulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexMultiBulkLoadTest.java
new file mode 100644
index 0000000..adfb689
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexMultiBulkLoadTest.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex;
+
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexLoadTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class LSMInvertedIndexMultiBulkLoadTest extends AbstractInvertedIndexLoadTest {
+
+    public LSMInvertedIndexMultiBulkLoadTest() {
+        super(InvertedIndexType.LSM, true, AccessMethodTestsConfig.LSM_INVINDEX_NUM_BULKLOAD_ROUNDS);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexSearchTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexSearchTest.java
new file mode 100644
index 0000000..1528e20
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexSearchTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexSearchTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class LSMInvertedIndexSearchTest extends AbstractInvertedIndexSearchTest {
+
+    public LSMInvertedIndexSearchTest() {
+        super(InvertedIndexType.LSM, false);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexBulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexBulkLoadTest.java
new file mode 100644
index 0000000..f7a36f0
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexBulkLoadTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexLoadTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class PartitionedLSMInvertedIndexBulkLoadTest extends AbstractInvertedIndexLoadTest {
+
+    public PartitionedLSMInvertedIndexBulkLoadTest() {
+        super(InvertedIndexType.PARTITIONED_LSM, true, 1);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexDeleteTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexDeleteTest.java
new file mode 100644
index 0000000..4fd529b
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexDeleteTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexDeleteTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class PartitionedLSMInvertedIndexDeleteTest extends AbstractInvertedIndexDeleteTest {
+
+    public PartitionedLSMInvertedIndexDeleteTest() {
+        super(InvertedIndexType.PARTITIONED_LSM, false);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexInsertTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexInsertTest.java
new file mode 100644
index 0000000..4608f81
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexInsertTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexLoadTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class PartitionedLSMInvertedIndexInsertTest extends AbstractInvertedIndexLoadTest {
+
+    public PartitionedLSMInvertedIndexInsertTest() {
+        super(InvertedIndexType.PARTITIONED_LSM, false, 1);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexMergeTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexMergeTest.java
new file mode 100644
index 0000000..786afe1
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexMergeTest.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex;
+
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.TupleGenerator;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexLoadTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestUtils;
+
+public class PartitionedLSMInvertedIndexMergeTest extends AbstractInvertedIndexLoadTest {
+
+    private final int maxTreesToMerge = AccessMethodTestsConfig.LSM_INVINDEX_MAX_TREES_TO_MERGE;
+
+    public PartitionedLSMInvertedIndexMergeTest() {
+        super(InvertedIndexType.PARTITIONED_LSM, true, 1);
+    }
+
+    @Override
+    protected void runTest(LSMInvertedIndexTestContext testCtx, TupleGenerator tupleGen) throws IOException,
+            IndexException {
+        IIndex invIndex = testCtx.getIndex();
+        invIndex.create();
+        invIndex.activate();
+        ILSMIndexAccessor invIndexAccessor = (ILSMIndexAccessor) invIndex.createAccessor(
+                NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+
+        for (int i = 0; i < maxTreesToMerge; i++) {
+            for (int j = 0; j < i; j++) {
+                if (bulkLoad) {
+                    LSMInvertedIndexTestUtils.bulkLoadInvIndex(testCtx, tupleGen, NUM_DOCS_TO_INSERT);
+                } else {
+                    LSMInvertedIndexTestUtils.insertIntoInvIndex(testCtx, tupleGen, NUM_DOCS_TO_INSERT);
+                }
+            }
+            // Perform merge.
+            invIndexAccessor.scheduleMerge(NoOpIOOperationCallback.INSTANCE);
+            validateAndCheckIndex(testCtx);
+            runTinySearchWorkload(testCtx, tupleGen);
+        }
+
+        invIndex.deactivate();
+        invIndex.destroy();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexMultiBulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexMultiBulkLoadTest.java
new file mode 100644
index 0000000..80a3c0b
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexMultiBulkLoadTest.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex;
+
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexLoadTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class PartitionedLSMInvertedIndexMultiBulkLoadTest extends AbstractInvertedIndexLoadTest {
+
+    public PartitionedLSMInvertedIndexMultiBulkLoadTest() {
+        super(InvertedIndexType.PARTITIONED_LSM, true, AccessMethodTestsConfig.LSM_INVINDEX_NUM_BULKLOAD_ROUNDS);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexSearchTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexSearchTest.java
new file mode 100644
index 0000000..c8a7667
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexSearchTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexSearchTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class PartitionedLSMInvertedIndexSearchTest extends AbstractInvertedIndexSearchTest {
+
+    public PartitionedLSMInvertedIndexSearchTest() {
+        super(InvertedIndexType.PARTITIONED_LSM, false);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/AbstractInvertedIndexDeleteTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/AbstractInvertedIndexDeleteTest.java
new file mode 100644
index 0000000..f7783fb
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/AbstractInvertedIndexDeleteTest.java
@@ -0,0 +1,100 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common;
+
+import java.io.IOException;
+
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.TupleGenerator;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestUtils;
+
+public abstract class AbstractInvertedIndexDeleteTest extends AbstractInvertedIndexTest {
+
+    protected final int numInsertRounds = AccessMethodTestsConfig.LSM_INVINDEX_NUM_INSERT_ROUNDS;
+    protected final int numDeleteRounds = AccessMethodTestsConfig.LSM_INVINDEX_NUM_DELETE_ROUNDS;
+    protected final boolean bulkLoad;
+
+    public AbstractInvertedIndexDeleteTest(InvertedIndexType invIndexType, boolean bulkLoad) {
+        super(invIndexType);
+        this.bulkLoad = bulkLoad;
+    }
+
+    protected void runTest(LSMInvertedIndexTestContext testCtx, TupleGenerator tupleGen) throws IOException,
+            IndexException {
+        IIndex invIndex = testCtx.getIndex();
+        invIndex.create();
+        invIndex.activate();
+
+        for (int i = 0; i < numInsertRounds; i++) {
+            // Start generating documents ids from 0 again.
+            tupleGen.reset();
+
+            if (bulkLoad) {
+                LSMInvertedIndexTestUtils.bulkLoadInvIndex(testCtx, tupleGen, NUM_DOCS_TO_INSERT);
+            } else {
+                LSMInvertedIndexTestUtils.insertIntoInvIndex(testCtx, tupleGen, NUM_DOCS_TO_INSERT);
+            }
+
+            // Delete all documents in a couple of rounds.
+            int numTuplesPerDeleteRound = (int) Math.ceil((float) testCtx.getDocumentCorpus().size()
+                    / (float) numDeleteRounds);
+            for (int j = 0; j < numDeleteRounds; j++) {
+                LSMInvertedIndexTestUtils.deleteFromInvIndex(testCtx, harness.getRandom(), numTuplesPerDeleteRound);
+                validateAndCheckIndex(testCtx);
+                runTinySearchWorkload(testCtx, tupleGen);
+            }
+        }
+
+        invIndex.deactivate();
+        invIndex.destroy();
+    }
+
+    @Test
+    public void wordTokensInvIndexTest() throws IOException, IndexException {
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createWordInvIndexTestContext(harness, invIndexType);
+        TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createStringDocumentTupleGen(harness.getRandom());
+        runTest(testCtx, tupleGen);
+    }
+
+    @Test
+    public void hashedWordTokensInvIndexTest() throws IOException, IndexException {
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createHashedWordInvIndexTestContext(harness,
+                invIndexType);
+        TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createStringDocumentTupleGen(harness.getRandom());
+        runTest(testCtx, tupleGen);
+    }
+
+    @Test
+    public void ngramTokensInvIndexTest() throws IOException, IndexException {
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createNGramInvIndexTestContext(harness, invIndexType);
+        TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createPersonNamesTupleGen(harness.getRandom());
+        runTest(testCtx, tupleGen);
+    }
+
+    @Test
+    public void hashedNGramTokensInvIndexTest() throws IOException, IndexException {
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createHashedNGramInvIndexTestContext(harness,
+                invIndexType);
+        TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createPersonNamesTupleGen(harness.getRandom());
+        runTest(testCtx, tupleGen);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/AbstractInvertedIndexLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/AbstractInvertedIndexLoadTest.java
new file mode 100644
index 0000000..c855cc4
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/AbstractInvertedIndexLoadTest.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common;
+
+import java.io.IOException;
+
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.TupleGenerator;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestUtils;
+
+public abstract class AbstractInvertedIndexLoadTest extends AbstractInvertedIndexTest {
+
+    protected final boolean bulkLoad;
+    protected final int numRounds;
+
+    public AbstractInvertedIndexLoadTest(InvertedIndexType invIndexType, boolean bulkLoad, int numRounds) {
+        super(invIndexType);
+        this.bulkLoad = bulkLoad;
+        this.numRounds = numRounds;
+    }
+
+    protected void runTest(LSMInvertedIndexTestContext testCtx, TupleGenerator tupleGen) throws IOException,
+            IndexException {
+        IIndex invIndex = testCtx.getIndex();
+        invIndex.create();
+        invIndex.activate();
+
+        for (int i = 0; i < numRounds; i++) {
+            if (bulkLoad) {
+                LSMInvertedIndexTestUtils.bulkLoadInvIndex(testCtx, tupleGen, NUM_DOCS_TO_INSERT);
+            } else {
+                LSMInvertedIndexTestUtils.insertIntoInvIndex(testCtx, tupleGen, NUM_DOCS_TO_INSERT);
+            }
+            validateAndCheckIndex(testCtx);
+            runTinySearchWorkload(testCtx, tupleGen);
+        }
+
+        invIndex.deactivate();
+        invIndex.destroy();
+    }
+
+    @Test
+    public void wordTokensInvIndexTest() throws IOException, IndexException {
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createWordInvIndexTestContext(harness, invIndexType);
+        TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createStringDocumentTupleGen(harness.getRandom());
+        runTest(testCtx, tupleGen);
+    }
+
+    @Test
+    public void hashedWordTokensInvIndexTest() throws IOException, IndexException {
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createHashedWordInvIndexTestContext(harness,
+                invIndexType);
+        TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createStringDocumentTupleGen(harness.getRandom());
+        runTest(testCtx, tupleGen);
+    }
+
+    @Test
+    public void ngramTokensInvIndexTest() throws IOException, IndexException {
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createNGramInvIndexTestContext(harness, invIndexType);
+        TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createPersonNamesTupleGen(harness.getRandom());
+        runTest(testCtx, tupleGen);
+    }
+
+    @Test
+    public void hashedNGramTokensInvIndexTest() throws IOException, IndexException {
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createHashedNGramInvIndexTestContext(harness,
+                invIndexType);
+        TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createPersonNamesTupleGen(harness.getRandom());
+        runTest(testCtx, tupleGen);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/AbstractInvertedIndexSearchTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/AbstractInvertedIndexSearchTest.java
new file mode 100644
index 0000000..991ff59
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/AbstractInvertedIndexSearchTest.java
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.TupleGenerator;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.ConjunctiveSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.EditDistanceSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.JaccardSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestUtils;
+
+public abstract class AbstractInvertedIndexSearchTest extends AbstractInvertedIndexTest {
+
+    protected final Logger LOGGER = Logger.getLogger(AbstractInvertedIndexSearchTest.class.getName());
+
+    protected int NUM_DOC_QUERIES = AccessMethodTestsConfig.LSM_INVINDEX_NUM_DOC_QUERIES;
+    protected int NUM_RANDOM_QUERIES = AccessMethodTestsConfig.LSM_INVINDEX_NUM_RANDOM_QUERIES;
+    protected final boolean bulkLoad;
+
+    public AbstractInvertedIndexSearchTest(InvertedIndexType invIndexType, boolean bulkLoad) {
+        super(invIndexType);
+        this.bulkLoad = bulkLoad;
+    }
+
+    protected void runTest(LSMInvertedIndexTestContext testCtx, TupleGenerator tupleGen,
+            List<IInvertedIndexSearchModifier> searchModifiers) throws IOException, IndexException {
+        IIndex invIndex = testCtx.getIndex();
+        invIndex.create();
+        invIndex.activate();
+
+        if (bulkLoad) {
+            LSMInvertedIndexTestUtils.bulkLoadInvIndex(testCtx, tupleGen, NUM_DOCS_TO_INSERT);
+        } else {
+            LSMInvertedIndexTestUtils.insertIntoInvIndex(testCtx, tupleGen, NUM_DOCS_TO_INSERT);
+        }
+        invIndex.validate();
+
+        for (IInvertedIndexSearchModifier searchModifier : searchModifiers) {
+            if (LOGGER.isLoggable(Level.INFO)) {
+                LOGGER.info("Running searches with: " + searchModifier.toString());
+            }
+            LSMInvertedIndexTestUtils.testIndexSearch(testCtx, tupleGen, harness.getRandom(), NUM_DOC_QUERIES,
+                    NUM_RANDOM_QUERIES, searchModifier, SCAN_COUNT_ARRAY);
+        }
+
+        invIndex.deactivate();
+        invIndex.destroy();
+    }
+
+    private void testWordInvIndexIndex(LSMInvertedIndexTestContext testCtx) throws IOException, IndexException {
+        TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createStringDocumentTupleGen(harness.getRandom());
+        List<IInvertedIndexSearchModifier> searchModifiers = new ArrayList<IInvertedIndexSearchModifier>();
+        searchModifiers.add(new ConjunctiveSearchModifier());
+        searchModifiers.add(new JaccardSearchModifier(1.0f));
+        searchModifiers.add(new JaccardSearchModifier(0.9f));
+        searchModifiers.add(new JaccardSearchModifier(0.7f));
+        searchModifiers.add(new JaccardSearchModifier(0.5f));
+        runTest(testCtx, tupleGen, searchModifiers);
+    }
+
+    private void testNGramInvIndexIndex(LSMInvertedIndexTestContext testCtx) throws IOException, IndexException {
+        TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createPersonNamesTupleGen(harness.getRandom());
+        List<IInvertedIndexSearchModifier> searchModifiers = new ArrayList<IInvertedIndexSearchModifier>();
+        searchModifiers.add(new ConjunctiveSearchModifier());
+        searchModifiers.add(new JaccardSearchModifier(1.0f));
+        searchModifiers.add(new JaccardSearchModifier(0.9f));
+        searchModifiers.add(new JaccardSearchModifier(0.7f));
+        searchModifiers.add(new JaccardSearchModifier(0.5f));
+        searchModifiers.add(new EditDistanceSearchModifier(LSMInvertedIndexTestUtils.TEST_GRAM_LENGTH, 0));
+        searchModifiers.add(new EditDistanceSearchModifier(LSMInvertedIndexTestUtils.TEST_GRAM_LENGTH, 1));
+        searchModifiers.add(new EditDistanceSearchModifier(LSMInvertedIndexTestUtils.TEST_GRAM_LENGTH, 2));
+        searchModifiers.add(new EditDistanceSearchModifier(LSMInvertedIndexTestUtils.TEST_GRAM_LENGTH, 3));
+        runTest(testCtx, tupleGen, searchModifiers);
+    }
+
+    @Test
+    public void wordTokensInvIndexTest() throws IOException, IndexException {
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createWordInvIndexTestContext(harness, invIndexType);
+        testWordInvIndexIndex(testCtx);
+    }
+
+    @Test
+    public void hashedWordTokensInvIndexTest() throws IOException, IndexException {
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createHashedWordInvIndexTestContext(harness,
+                invIndexType);
+        testWordInvIndexIndex(testCtx);
+    }
+
+    @Test
+    public void ngramTokensInvIndexTest() throws IOException, IndexException {
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createNGramInvIndexTestContext(harness, invIndexType);
+        testNGramInvIndexIndex(testCtx);
+    }
+
+    @Test
+    public void hashedNGramTokensInvIndexTest() throws IOException, IndexException {
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createHashedNGramInvIndexTestContext(harness,
+                invIndexType);
+        testNGramInvIndexIndex(testCtx);
+    }
+
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/AbstractInvertedIndexTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/AbstractInvertedIndexTest.java
new file mode 100644
index 0000000..90a6d54
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/AbstractInvertedIndexTest.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common;
+
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.TupleGenerator;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.ConjunctiveSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.JaccardSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestUtils;
+
+public abstract class AbstractInvertedIndexTest {
+    protected final Logger LOGGER = Logger.getLogger(AbstractInvertedIndexTest.class.getName());
+
+    protected final LSMInvertedIndexTestHarness harness = new LSMInvertedIndexTestHarness();
+
+    protected final int NUM_DOCS_TO_INSERT = AccessMethodTestsConfig.LSM_INVINDEX_NUM_DOCS_TO_INSERT;
+    protected final int[] SCAN_COUNT_ARRAY = new int[AccessMethodTestsConfig.LSM_INVINDEX_SCAN_COUNT_ARRAY_SIZE];
+
+    protected final int TINY_WORKLOAD_NUM_DOC_QUERIES = AccessMethodTestsConfig.LSM_INVINDEX_TINY_NUM_DOC_QUERIES;
+    protected final int TINY_WORKLOAD_NUM_RANDOM_QUERIES = AccessMethodTestsConfig.LSM_INVINDEX_TINY_NUM_RANDOM_QUERIES;
+
+    // Note: The edit-distance search modifier is tested separately.
+    protected final IInvertedIndexSearchModifier[] TEST_SEARCH_MODIFIERS = new IInvertedIndexSearchModifier[] {
+            new ConjunctiveSearchModifier(), new JaccardSearchModifier(0.8f), new JaccardSearchModifier(0.5f) };
+
+    protected final InvertedIndexType invIndexType;
+
+    public AbstractInvertedIndexTest(InvertedIndexType invIndexType) {
+        this.invIndexType = invIndexType;
+    }
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    /**
+     * Validates the index, and compares it against the expected index.
+     * This test is only for verifying the integrity and correctness of the index,
+     * it does not ensure the correctness of index searches.
+     */
+    protected void validateAndCheckIndex(LSMInvertedIndexTestContext testCtx) throws HyracksDataException, IndexException {
+        IIndex invIndex = testCtx.getIndex();
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("Validating index: " + invIndex);
+        }
+        // Validate index and compare against expected index.
+        invIndex.validate();
+        if (invIndexType == InvertedIndexType.INMEMORY || invIndexType == InvertedIndexType.ONDISK) {
+            // This comparison method exercises different features of these types of inverted indexes.
+            LSMInvertedIndexTestUtils.compareActualAndExpectedIndexes(testCtx);
+        }
+        LSMInvertedIndexTestUtils.compareActualAndExpectedIndexesRangeSearch(testCtx);
+    }
+
+    /**
+     * Runs a workload of queries using different search modifiers, and verifies the correctness of the results.
+     */
+    protected void runTinySearchWorkload(LSMInvertedIndexTestContext testCtx, TupleGenerator tupleGen) throws IOException,
+            IndexException {
+        for (IInvertedIndexSearchModifier searchModifier : TEST_SEARCH_MODIFIERS) {
+            if (LOGGER.isLoggable(Level.INFO)) {
+                LOGGER.info("Running test workload with: " + searchModifier.toString());
+            }
+            LSMInvertedIndexTestUtils.testIndexSearch(testCtx, tupleGen, harness.getRandom(),
+                    TINY_WORKLOAD_NUM_DOC_QUERIES, TINY_WORKLOAD_NUM_RANDOM_QUERIES, searchModifier, SCAN_COUNT_ARRAY);
+        }
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/LSMInvertedIndexTestHarness.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/LSMInvertedIndexTestHarness.java
new file mode 100644
index 0000000..5be1d6a
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/common/LSMInvertedIndexTestHarness.java
@@ -0,0 +1,216 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Random;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.control.nc.io.IOManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.DualIndexInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.DualIndexInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.SynchronousScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ThreadCountingOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.HeapBufferAllocator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.test.support.TestUtils;
+
+public class LSMInvertedIndexTestHarness {
+
+    private static final long RANDOM_SEED = 50;
+
+    protected final int diskPageSize;
+    protected final int diskNumPages;
+    protected final int diskMaxOpenFiles;
+    protected final int memPageSize;
+    protected final int memNumPages;
+    protected final int hyracksFrameSize;
+
+    protected IOManager ioManager;
+    protected IBufferCache diskBufferCache;
+    protected IFileMapProvider diskFileMapProvider;
+    protected IInMemoryBufferCache memBufferCache;
+    protected IInMemoryFreePageManager memFreePageManager;
+    protected IHyracksTaskContext ctx;
+    protected ILSMIOOperationScheduler ioScheduler;
+    protected ILSMMergePolicy mergePolicy;
+    protected ILSMOperationTrackerFactory opTrackerFactory;
+    protected ILSMIOOperationCallbackProvider ioOpCallbackProvider;
+
+    protected final Random rnd = new Random();
+    protected final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
+    protected final static String sep = System.getProperty("file.separator");
+    protected String onDiskDir;
+    protected String btreeFileName = "btree_vocab";
+    protected String invIndexFileName = "inv_index";
+    protected FileReference invIndexFileRef;
+
+    public LSMInvertedIndexTestHarness() {
+        this.diskPageSize = AccessMethodTestsConfig.LSM_INVINDEX_DISK_PAGE_SIZE;
+        this.diskNumPages = AccessMethodTestsConfig.LSM_INVINDEX_DISK_NUM_PAGES;
+        this.diskMaxOpenFiles = AccessMethodTestsConfig.LSM_INVINDEX_DISK_MAX_OPEN_FILES;
+        this.memPageSize = AccessMethodTestsConfig.LSM_INVINDEX_MEM_PAGE_SIZE;
+        this.memNumPages = AccessMethodTestsConfig.LSM_INVINDEX_MEM_NUM_PAGES;
+        this.hyracksFrameSize = AccessMethodTestsConfig.LSM_INVINDEX_HYRACKS_FRAME_SIZE;
+        this.ioScheduler = SynchronousScheduler.INSTANCE;
+        this.mergePolicy = NoMergePolicy.INSTANCE;
+        this.opTrackerFactory = ThreadCountingOperationTrackerFactory.INSTANCE;
+        this.ioOpCallbackProvider = NoOpIOOperationCallback.INSTANCE;
+    }
+
+    public LSMInvertedIndexTestHarness(int diskPageSize, int diskNumPages, int diskMaxOpenFiles, int memPageSize,
+            int memNumPages, int hyracksFrameSize) {
+        this.diskPageSize = diskPageSize;
+        this.diskNumPages = diskNumPages;
+        this.diskMaxOpenFiles = diskMaxOpenFiles;
+        this.memPageSize = memPageSize;
+        this.memNumPages = memNumPages;
+        this.hyracksFrameSize = hyracksFrameSize;
+        this.ioScheduler = SynchronousScheduler.INSTANCE;
+        this.mergePolicy = NoMergePolicy.INSTANCE;
+        this.opTrackerFactory = ThreadCountingOperationTrackerFactory.INSTANCE;
+    }
+
+    public void setUp() throws HyracksException {
+        onDiskDir = "lsm_invertedindex_" + simpleDateFormat.format(new Date()) + sep;
+        ctx = TestUtils.create(getHyracksFrameSize());
+        TestStorageManagerComponentHolder.init(diskPageSize, diskNumPages, diskMaxOpenFiles);
+        diskBufferCache = TestStorageManagerComponentHolder.getBufferCache(ctx);
+        diskFileMapProvider = TestStorageManagerComponentHolder.getFileMapProvider(ctx);
+        memBufferCache = new DualIndexInMemoryBufferCache(new HeapBufferAllocator(), memPageSize, memNumPages);
+        memBufferCache.open();
+        memFreePageManager = new DualIndexInMemoryFreePageManager(memNumPages, new LIFOMetaDataFrameFactory());
+        ioManager = TestStorageManagerComponentHolder.getIOManager();
+        rnd.setSeed(RANDOM_SEED);
+        invIndexFileRef = ioManager.getIODevices().get(0).createFileReference(onDiskDir + invIndexFileName);
+    }
+
+    public void tearDown() throws HyracksDataException {
+        diskBufferCache.close();
+        for (IODeviceHandle dev : ioManager.getIODevices()) {
+            File dir = new File(dev.getPath(), onDiskDir);
+            FilenameFilter filter = new FilenameFilter() {
+                public boolean accept(File dir, String name) {
+                    return !name.startsWith(".");
+                }
+            };
+            String[] files = dir.list(filter);
+            if (files != null) {
+                for (String fileName : files) {
+                    File file = new File(dir.getPath() + File.separator + fileName);
+                    file.delete();
+                }
+            }
+            dir.delete();
+        }
+        memBufferCache.close();
+    }
+
+    public FileReference getInvListsFileRef() {
+        return invIndexFileRef;
+    }
+
+    public int getDiskPageSize() {
+        return diskPageSize;
+    }
+
+    public int getDiskNumPages() {
+        return diskNumPages;
+    }
+
+    public int getDiskMaxOpenFiles() {
+        return diskMaxOpenFiles;
+    }
+
+    public int getMemPageSize() {
+        return memPageSize;
+    }
+
+    public int getMemNumPages() {
+        return memNumPages;
+    }
+
+    public int getHyracksFrameSize() {
+        return hyracksFrameSize;
+    }
+
+    public IOManager getIOManager() {
+        return ioManager;
+    }
+
+    public IBufferCache getDiskBufferCache() {
+        return diskBufferCache;
+    }
+
+    public IFileMapProvider getDiskFileMapProvider() {
+        return diskFileMapProvider;
+    }
+
+    public IInMemoryBufferCache getMemBufferCache() {
+        return memBufferCache;
+    }
+
+    public IInMemoryFreePageManager getMemFreePageManager() {
+        return memFreePageManager;
+    }
+
+    public IHyracksTaskContext getHyracksTastContext() {
+        return ctx;
+    }
+
+    public String getOnDiskDir() {
+        return onDiskDir;
+    }
+
+    public Random getRandom() {
+        return rnd;
+    }
+
+    public ILSMIOOperationScheduler getIOScheduler() {
+        return ioScheduler;
+    }
+
+    public ILSMOperationTrackerFactory getOperationTrackerFactory() {
+        return opTrackerFactory;
+    }
+
+    public ILSMMergePolicy getMergePolicy() {
+        return mergePolicy;
+    }
+
+    public ILSMIOOperationCallbackProvider getIOOperationCallbackProvider() {
+        return ioOpCallbackProvider;
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexDeleteTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexDeleteTest.java
new file mode 100644
index 0000000..c71d996
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexDeleteTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexDeleteTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class InMemoryInvertedIndexDeleteTest extends AbstractInvertedIndexDeleteTest {
+    
+    public InMemoryInvertedIndexDeleteTest() {
+        super(InvertedIndexType.INMEMORY, false);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexInsertTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexInsertTest.java
new file mode 100644
index 0000000..d2b883d
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexInsertTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexLoadTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class InMemoryInvertedIndexInsertTest extends AbstractInvertedIndexLoadTest {
+    
+    public InMemoryInvertedIndexInsertTest() {
+        super(InvertedIndexType.INMEMORY, false, 1);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexSearchTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexSearchTest.java
new file mode 100644
index 0000000..f3b3026
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/InMemoryInvertedIndexSearchTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexSearchTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class InMemoryInvertedIndexSearchTest extends AbstractInvertedIndexSearchTest {
+
+    public InMemoryInvertedIndexSearchTest() {
+        super(InvertedIndexType.INMEMORY, false);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexDeleteTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexDeleteTest.java
new file mode 100644
index 0000000..eac7765
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexDeleteTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexDeleteTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class PartitionedInMemoryInvertedIndexDeleteTest extends AbstractInvertedIndexDeleteTest {
+    
+    public PartitionedInMemoryInvertedIndexDeleteTest() {
+        super(InvertedIndexType.PARTITIONED_INMEMORY, false);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexInsertTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexInsertTest.java
new file mode 100644
index 0000000..8342efd
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexInsertTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexLoadTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class PartitionedInMemoryInvertedIndexInsertTest extends AbstractInvertedIndexLoadTest {
+
+    public PartitionedInMemoryInvertedIndexInsertTest() {
+        super(InvertedIndexType.PARTITIONED_INMEMORY, false, 1);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexSearchTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexSearchTest.java
new file mode 100644
index 0000000..385d65d
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndexSearchTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexSearchTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class PartitionedInMemoryInvertedIndexSearchTest extends AbstractInvertedIndexSearchTest {
+
+    public PartitionedInMemoryInvertedIndexSearchTest() {
+        super(InvertedIndexType.PARTITIONED_INMEMORY, false);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexMultiThreadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexMultiThreadTest.java
new file mode 100644
index 0000000..bd48068
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexMultiThreadTest.java
@@ -0,0 +1,162 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.multithread;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.TestWorkloadConf;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.ProbabilityHelper;
+import edu.uci.ics.hyracks.storage.am.common.datagen.TupleGenerator;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.LSMInvertedIndexTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestUtils;
+
+public class LSMInvertedIndexMultiThreadTest {
+
+    protected final Logger LOGGER = Logger.getLogger(LSMInvertedIndexMultiThreadTest.class.getName());
+
+    // Machine-specific number of threads to use for testing.
+    protected final int REGULAR_NUM_THREADS = Runtime.getRuntime().availableProcessors();
+    // Excessive number of threads for testing.
+    protected final int EXCESSIVE_NUM_THREADS = Runtime.getRuntime().availableProcessors() * 4;
+    protected final int NUM_OPERATIONS = AccessMethodTestsConfig.LSM_INVINDEX_MULTITHREAD_NUM_OPERATIONS;
+
+    protected final LSMInvertedIndexTestHarness harness = new LSMInvertedIndexTestHarness();
+    protected final LSMInvertedIndexWorkerFactory workerFactory = new LSMInvertedIndexWorkerFactory();
+    protected final ArrayList<TestWorkloadConf> workloadConfs = getTestWorkloadConf();
+
+    protected void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    protected void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    protected void runTest(LSMInvertedIndexTestContext testCtx, TupleGenerator tupleGen, int numThreads,
+            TestWorkloadConf conf, String dataMsg) throws InterruptedException, TreeIndexException, HyracksException {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("LSMInvertedIndex MultiThread Test:\nData: " + dataMsg + "; Threads: " + numThreads
+                    + "; Workload: " + conf.toString() + ".");
+        }
+
+        // 4 batches per thread.
+        int batchSize = (NUM_OPERATIONS / numThreads) / 4;
+
+        LSMInvertedIndexMultiThreadTestDriver driver = new LSMInvertedIndexMultiThreadTestDriver(testCtx.getIndex(),
+                workerFactory, tupleGen.getFieldSerdes(), tupleGen.getFieldGens(), conf.ops, conf.opProbs);
+        driver.init();
+        long[] times = driver.run(numThreads, 1, NUM_OPERATIONS, batchSize);
+        testCtx.getIndex().validate();
+        driver.deinit();
+
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("LSMInvertedIndex MultiThread Test Time: " + times[0] + "ms");
+        }
+    }
+
+    protected ArrayList<TestWorkloadConf> getTestWorkloadConf() {
+        ArrayList<TestWorkloadConf> workloadConfs = new ArrayList<TestWorkloadConf>();
+
+        // Insert only workload.
+        TestOperation[] insertOnlyOps = new TestOperation[] { TestOperation.INSERT };
+        workloadConfs.add(new TestWorkloadConf(insertOnlyOps, ProbabilityHelper
+                .getUniformProbDist(insertOnlyOps.length)));
+
+        // Insert and merge workload.
+        TestOperation[] insertMergeOps = new TestOperation[] { TestOperation.INSERT, TestOperation.MERGE };
+        workloadConfs.add(new TestWorkloadConf(insertMergeOps, ProbabilityHelper
+                .getUniformProbDist(insertMergeOps.length)));
+
+        // Inserts mixed with point searches and scans.
+        TestOperation[] insertSearchOnlyOps = new TestOperation[] { TestOperation.INSERT, TestOperation.POINT_SEARCH,
+                TestOperation.SCAN };
+        workloadConfs.add(new TestWorkloadConf(insertSearchOnlyOps, ProbabilityHelper
+                .getUniformProbDist(insertSearchOnlyOps.length)));
+
+        // Inserts, and deletes.
+        TestOperation[] insertDeleteUpdateOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE };
+        workloadConfs.add(new TestWorkloadConf(insertDeleteUpdateOps, ProbabilityHelper
+                .getUniformProbDist(insertDeleteUpdateOps.length)));
+
+        // Inserts, deletes and merges.
+        TestOperation[] insertDeleteUpdateMergeOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE,
+                TestOperation.MERGE };
+        workloadConfs.add(new TestWorkloadConf(insertDeleteUpdateMergeOps, ProbabilityHelper
+                .getUniformProbDist(insertDeleteUpdateMergeOps.length)));
+
+        // All operations except merge.
+        TestOperation[] allNoMergeOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE,
+                TestOperation.POINT_SEARCH, TestOperation.SCAN };
+        workloadConfs.add(new TestWorkloadConf(allNoMergeOps, ProbabilityHelper
+                .getUniformProbDist(allNoMergeOps.length)));
+
+        // All operations.
+        TestOperation[] allOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE,
+                TestOperation.POINT_SEARCH, TestOperation.SCAN, TestOperation.MERGE };
+        workloadConfs.add(new TestWorkloadConf(allOps, ProbabilityHelper.getUniformProbDist(allOps.length)));
+
+        return workloadConfs;
+    }
+
+    @Test
+    public void wordTokensInvIndexTest() throws IOException, IndexException, InterruptedException {
+        String dataMsg = "Documents";
+        int[] numThreads = new int[] { REGULAR_NUM_THREADS, EXCESSIVE_NUM_THREADS };
+        for (int i = 0; i < numThreads.length; i++) {
+            for (TestWorkloadConf conf : workloadConfs) {
+                setUp();
+                LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createWordInvIndexTestContext(harness,
+                        getIndexType());
+                TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createStringDocumentTupleGen(harness.getRandom());
+                runTest(testCtx, tupleGen, numThreads[i], conf, dataMsg);
+                tearDown();
+            }
+        }
+    }
+
+    @Test
+    public void hashedNGramTokensInvIndexTest() throws IOException, IndexException, InterruptedException {
+        String dataMsg = "Person Names";
+        int[] numThreads = new int[] { REGULAR_NUM_THREADS, EXCESSIVE_NUM_THREADS };
+        for (int i = 0; i < numThreads.length; i++) {
+            for (TestWorkloadConf conf : workloadConfs) {
+                setUp();
+                LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createHashedNGramInvIndexTestContext(
+                        harness, getIndexType());
+                TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createPersonNamesTupleGen(harness.getRandom());
+                runTest(testCtx, tupleGen, numThreads[i], conf, dataMsg);
+                tearDown();
+            }
+        }
+    }
+
+    protected InvertedIndexType getIndexType() {
+        return InvertedIndexType.LSM;
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexMultiThreadTestDriver.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexMultiThreadTestDriver.java
new file mode 100644
index 0000000..6159969
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexMultiThreadTestDriver.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.multithread;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestWorkerFactory;
+import edu.uci.ics.hyracks.storage.am.common.IndexMultiThreadTestDriver;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+import edu.uci.ics.hyracks.storage.am.common.datagen.IFieldValueGenerator;
+
+@SuppressWarnings("rawtypes")
+public class LSMInvertedIndexMultiThreadTestDriver extends IndexMultiThreadTestDriver {
+
+    protected final IFieldValueGenerator[] fieldGens;
+
+    public LSMInvertedIndexMultiThreadTestDriver(IIndex index, IIndexTestWorkerFactory workerFactory,
+            ISerializerDeserializer[] fieldSerdes, IFieldValueGenerator[] fieldGens, TestOperation[] ops,
+            double[] opProbs) {
+        super(index, workerFactory, fieldSerdes, ops, opProbs);
+        this.fieldGens = fieldGens;
+    }
+
+    public DataGenThread createDatagenThread(int numThreads, int numBatches, int batchSize) {
+        return new DataGenThread(numThreads, numBatches, batchSize, fieldSerdes, fieldGens, RANDOM_SEED, 2 * numThreads);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexTestWorker.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexTestWorker.java
new file mode 100644
index 0000000..d6bb3d3
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexTestWorker.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.multithread;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexTestWorker;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.exceptions.OccurrenceThresholdPanicException;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls.LSMInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.impls.LSMInvertedIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.ConjunctiveSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.InvertedIndexSearchPredicate;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.JaccardSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+
+public class LSMInvertedIndexTestWorker extends AbstractIndexTestWorker {
+
+    protected final LSMInvertedIndex invIndex;
+    protected final List<ITupleReference> documentCorpus = new ArrayList<ITupleReference>();
+    protected final Random rnd = new Random(50);
+
+    protected final IInvertedIndexSearchModifier[] TEST_SEARCH_MODIFIERS = new IInvertedIndexSearchModifier[] {
+            new ConjunctiveSearchModifier(), new JaccardSearchModifier(0.8f), new JaccardSearchModifier(0.5f) };
+
+    public LSMInvertedIndexTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index,
+            int numBatches) {
+        super(dataGen, opSelector, index, numBatches);
+        invIndex = (LSMInvertedIndex) index;
+    }
+
+    @Override
+    public void performOp(ITupleReference tuple, TestOperation op) throws HyracksDataException, IndexException {
+        LSMInvertedIndexAccessor accessor = (LSMInvertedIndexAccessor) indexAccessor;
+        IIndexCursor searchCursor = accessor.createSearchCursor();
+        IIndexCursor rangeSearchCursor = accessor.createRangeSearchCursor();
+        RangePredicate rangePred = new RangePredicate(null, null, true, true, null, null);
+        IBinaryTokenizerFactory tokenizerFactory = invIndex.getTokenizerFactory();
+        int searchModifierIndex = Math.abs(rnd.nextInt()) % TEST_SEARCH_MODIFIERS.length;
+        InvertedIndexSearchPredicate searchPred = new InvertedIndexSearchPredicate(tokenizerFactory.createTokenizer(),
+                TEST_SEARCH_MODIFIERS[searchModifierIndex]);
+
+        switch (op) {
+            case INSERT: {
+                insert(accessor, tuple);
+                break;
+            }
+
+            case DELETE: {
+                // Randomly pick a document from the corpus to delete.
+                if (!documentCorpus.isEmpty()) {
+                    int docIndex = Math.abs(rnd.nextInt()) % documentCorpus.size();
+                    ITupleReference deleteTuple = documentCorpus.get(docIndex);
+                    accessor.delete(deleteTuple);
+                    // Swap tupleIndex with last element.
+                    documentCorpus.set(docIndex, documentCorpus.get(documentCorpus.size() - 1));
+                    documentCorpus.remove(documentCorpus.size() - 1);
+                } else {
+                    // No existing documents to delete, treat this case as an insert.
+                    insert(accessor, tuple);
+                }
+                break;
+            }
+
+            case POINT_SEARCH: {
+                searchCursor.reset();
+                searchPred.setQueryTuple(tuple);
+                searchPred.setQueryFieldIndex(0);
+                try {
+                    accessor.search(searchCursor, searchPred);
+                    consumeCursorTuples(searchCursor);
+                } catch (OccurrenceThresholdPanicException e) {
+                    // Ignore.
+                }
+                break;
+            }
+
+            case SCAN: {
+                rangeSearchCursor.reset();
+                accessor.rangeSearch(rangeSearchCursor, rangePred);
+                consumeCursorTuples(rangeSearchCursor);
+                break;
+            }
+
+            case MERGE: {
+                accessor.scheduleMerge(NoOpIOOperationCallback.INSTANCE);
+                break;
+            }
+
+            default:
+                throw new HyracksDataException("Op " + op.toString() + " not supported.");
+        }
+    }
+
+    private void insert(LSMInvertedIndexAccessor accessor, ITupleReference tuple) throws HyracksDataException,
+            IndexException {
+        // Ignore ongoing merges. Do an insert instead.
+        accessor.insert(tuple);
+        // Add tuple to document corpus so we can delete it.
+        ITupleReference copyTuple = TupleUtils.copyTuple(tuple);
+        documentCorpus.add(copyTuple);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexWorkerFactory.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexWorkerFactory.java
new file mode 100644
index 0000000..cce843b
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexWorkerFactory.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.multithread;
+
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexTestWorker;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestWorkerFactory;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+
+public class LSMInvertedIndexWorkerFactory implements IIndexTestWorkerFactory {
+    @Override
+    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector,
+            IIndex index, int numBatches) {
+        return new LSMInvertedIndexTestWorker(dataGen, opSelector, index, numBatches);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/PartitionedLSMInvertedIndexMultiThreadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/PartitionedLSMInvertedIndexMultiThreadTest.java
new file mode 100644
index 0000000..1adaf61
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/multithread/PartitionedLSMInvertedIndexMultiThreadTest.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.multithread;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class PartitionedLSMInvertedIndexMultiThreadTest extends LSMInvertedIndexMultiThreadTest {
+
+    protected InvertedIndexType getIndexType() {
+        return InvertedIndexType.PARTITIONED_LSM;
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeFrameTupleTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeFrameTupleTest.java
new file mode 100644
index 0000000..3059062
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/FixedSizeFrameTupleTest.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Random;
+
+import junit.framework.Assert;
+
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.FixedSizeFrameTupleAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.FixedSizeFrameTupleAppender;
+
+public class FixedSizeFrameTupleTest {
+
+    private static int FRAME_SIZE = 4096;
+
+    private Random rnd = new Random(50);
+
+    /**
+     * This test verifies the correct behavior of the FixedSizeFrameTuple class.
+     * Frames containing FixedSizeFrameTuple's require neither tuple slots nor
+     * field slots. The tests inserts generated data into a frame until the
+     * frame is full, and then verifies the frame's contents.
+     * 
+     */
+    @Test
+    public void singleFieldTest() throws Exception {
+        ByteBuffer buffer = ByteBuffer.allocate(FRAME_SIZE);
+
+        ITypeTraits[] fields = new ITypeTraits[1];
+        fields[0] = IntegerPointable.TYPE_TRAITS;
+
+        FixedSizeFrameTupleAppender ftapp = new FixedSizeFrameTupleAppender(FRAME_SIZE, fields);
+        FixedSizeFrameTupleAccessor ftacc = new FixedSizeFrameTupleAccessor(FRAME_SIZE, fields);
+
+        boolean frameHasSpace = true;
+
+        ArrayList<Integer> check = new ArrayList<Integer>();
+
+        ftapp.reset(buffer, true);
+        while (frameHasSpace) {
+            int val = rnd.nextInt();
+            frameHasSpace = ftapp.append(val);
+            if (frameHasSpace) {
+                check.add(val);
+                ftapp.incrementTupleCount(1);
+            }
+        }
+
+        ftacc.reset(buffer);
+        for (int i = 0; i < ftacc.getTupleCount(); i++) {
+            int val = IntegerSerializerDeserializer.getInt(ftacc.getBuffer().array(), ftacc.getTupleStartOffset(i));
+            Assert.assertEquals(check.get(i).intValue(), val);
+        }
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexBulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexBulkLoadTest.java
new file mode 100644
index 0000000..4813615
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexBulkLoadTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexLoadTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class OnDiskInvertedIndexBulkLoadTest extends AbstractInvertedIndexLoadTest {
+
+    public OnDiskInvertedIndexBulkLoadTest() {
+        super(InvertedIndexType.ONDISK, true, 1);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexLifecycleTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexLifecycleTest.java
new file mode 100644
index 0000000..09432de
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexLifecycleTest.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import java.io.File;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
+import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexLifecycleTest;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListBuilder;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.LSMInvertedIndexTestHarness;
+
+public class OnDiskInvertedIndexLifecycleTest extends AbstractIndexLifecycleTest {
+
+    private final LSMInvertedIndexTestHarness harness = new LSMInvertedIndexTestHarness();
+    private ITreeIndexFrame frame = null;
+
+    @Override
+    protected boolean persistentStateExists() throws Exception {
+        return harness.getInvListsFileRef().getFile().exists()
+                && ((OnDiskInvertedIndex) index).getBTree().getFileReference().getFile().exists();
+    }
+
+    @Override
+    protected boolean isEmptyIndex() throws Exception {
+        if (frame == null) {
+            frame = ((OnDiskInvertedIndex) index).getBTree().getLeafFrameFactory().createFrame();
+        }
+        return ((OnDiskInvertedIndex) index).getBTree().isEmptyTree(frame);
+    }
+
+    @Override
+    public void setup() throws Exception {
+        harness.setUp();
+        ITypeTraits[] tokenTypeTraits = new ITypeTraits[] { UTF8StringPointable.TYPE_TRAITS };
+        IBinaryComparatorFactory[] tokenCmpFactories = new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
+                .of(UTF8StringPointable.FACTORY) };
+        ITypeTraits[] invListTypeTraits = new ITypeTraits[] { IntegerPointable.TYPE_TRAITS };
+        IBinaryComparatorFactory[] invListCmpFactories = new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
+                .of(IntegerPointable.FACTORY) };
+        IInvertedListBuilder invListBuilder = new FixedSizeElementInvertedListBuilder(invListTypeTraits);
+        FileReference btreeFile = new FileReference(new File(harness.getInvListsFileRef().getFile().getPath() + "_btree"));
+        index = new OnDiskInvertedIndex(harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), invListBuilder,
+                invListTypeTraits, invListCmpFactories, tokenTypeTraits, tokenCmpFactories, harness.getInvListsFileRef(),
+                btreeFile);
+
+    }
+
+    @Override
+    public void tearDown() throws Exception {
+        index.deactivate();
+        index.destroy();
+        harness.tearDown();
+    }
+
+    @Override
+    protected void performInsertions() throws Exception {
+        // Do nothing.
+    }
+
+    @Override
+    protected void checkInsertions() throws Exception {
+        // Do nothing.
+    }
+
+    @Override
+    protected void clearCheckableInsertions() throws Exception {
+        // Do nothing.
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexSearchTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexSearchTest.java
new file mode 100644
index 0000000..76d9200
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndexSearchTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexSearchTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class OnDiskInvertedIndexSearchTest extends AbstractInvertedIndexSearchTest {
+
+    public OnDiskInvertedIndexSearchTest() {
+        super(InvertedIndexType.ONDISK, true);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/PartitionedOnDiskInvertedIndexBulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/PartitionedOnDiskInvertedIndexBulkLoadTest.java
new file mode 100644
index 0000000..f641630
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/PartitionedOnDiskInvertedIndexBulkLoadTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexLoadTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class PartitionedOnDiskInvertedIndexBulkLoadTest extends AbstractInvertedIndexLoadTest {
+
+    public PartitionedOnDiskInvertedIndexBulkLoadTest() {
+        super(InvertedIndexType.PARTITIONED_ONDISK, true, 1);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/PartitionedOnDiskInvertedIndexSearchTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/PartitionedOnDiskInvertedIndexSearchTest.java
new file mode 100644
index 0000000..4fa25ed
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/PartitionedOnDiskInvertedIndexSearchTest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk;
+
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.AbstractInvertedIndexSearchTest;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+public class PartitionedOnDiskInvertedIndexSearchTest extends AbstractInvertedIndexSearchTest {
+
+    public PartitionedOnDiskInvertedIndexSearchTest() {
+        super(InvertedIndexType.PARTITIONED_ONDISK, true);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/NGramTokenizerTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/NGramTokenizerTest.java
new file mode 100644
index 0000000..33ea4f5
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/NGramTokenizerTest.java
@@ -0,0 +1,228 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInput;
+import java.io.DataInputStream;
+import java.io.DataOutput;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.data.std.util.GrowableArray;
+
+public class NGramTokenizerTest {
+
+    private char PRECHAR = '#';
+    private char POSTCHAR = '$';
+
+    private String str = "Jürgen S. Generic's Car";
+    private byte[] inputBuffer;
+
+    private int gramLength = 3;
+
+    private void getExpectedGrams(String s, int gramLength, ArrayList<String> grams, boolean prePost) {
+
+        String tmp = s.toLowerCase();
+        if (prePost) {
+            StringBuilder preBuilder = new StringBuilder();
+            for (int i = 0; i < gramLength - 1; i++) {
+                preBuilder.append(PRECHAR);
+            }
+            String pre = preBuilder.toString();
+
+            StringBuilder postBuilder = new StringBuilder();
+            for (int i = 0; i < gramLength - 1; i++) {
+                postBuilder.append(POSTCHAR);
+            }
+            String post = postBuilder.toString();
+
+            tmp = pre + s.toLowerCase() + post;
+        }
+
+        for (int i = 0; i < tmp.length() - gramLength + 1; i++) {
+            String gram = tmp.substring(i, i + gramLength);
+            grams.add(gram);
+        }
+    }
+
+    @Before
+    public void init() throws Exception {
+        // serialize string into bytes
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        DataOutput dos = new DataOutputStream(baos);
+        dos.writeUTF(str);
+        inputBuffer = baos.toByteArray();
+    }
+
+    void runTestNGramTokenizerWithCountedHashedUTF8Tokens(boolean prePost) throws IOException {
+        HashedUTF8NGramTokenFactory tokenFactory = new HashedUTF8NGramTokenFactory();
+        NGramUTF8StringBinaryTokenizer tokenizer = new NGramUTF8StringBinaryTokenizer(gramLength, prePost, false,
+                false, tokenFactory);
+        tokenizer.reset(inputBuffer, 0, inputBuffer.length);
+
+        ArrayList<String> expectedGrams = new ArrayList<String>();
+        getExpectedGrams(str, gramLength, expectedGrams, prePost);
+        ArrayList<Integer> expectedHashedGrams = new ArrayList<Integer>();
+        HashMap<String, Integer> gramCounts = new HashMap<String, Integer>();
+        for (String s : expectedGrams) {
+            Integer count = gramCounts.get(s);
+            if (count == null) {
+                count = 1;
+                gramCounts.put(s, count);
+            } else {
+                count++;
+            }
+
+            int hash = tokenHash(s, count);
+            expectedHashedGrams.add(hash);
+        }
+
+        int tokenCount = 0;
+
+        while (tokenizer.hasNext()) {
+            tokenizer.next();
+
+            // serialize hashed token
+            GrowableArray tokenData = new GrowableArray();
+
+            IToken token = tokenizer.getToken();
+            token.serializeToken(tokenData);
+
+            // deserialize token
+            ByteArrayInputStream bais = new ByteArrayInputStream(tokenData.getByteArray());
+            DataInput in = new DataInputStream(bais);
+
+            Integer hashedGram = in.readInt();
+
+            // System.out.println(hashedGram);
+
+            Assert.assertEquals(expectedHashedGrams.get(tokenCount), hashedGram);
+
+            tokenCount++;
+        }
+        // System.out.println("---------");
+    }
+
+    void runTestNGramTokenizerWithHashedUTF8Tokens(boolean prePost) throws IOException {
+        HashedUTF8NGramTokenFactory tokenFactory = new HashedUTF8NGramTokenFactory();
+        NGramUTF8StringBinaryTokenizer tokenizer = new NGramUTF8StringBinaryTokenizer(gramLength, prePost, true, false,
+                tokenFactory);
+        tokenizer.reset(inputBuffer, 0, inputBuffer.length);
+
+        ArrayList<String> expectedGrams = new ArrayList<String>();
+        getExpectedGrams(str, gramLength, expectedGrams, prePost);
+        ArrayList<Integer> expectedHashedGrams = new ArrayList<Integer>();
+        for (String s : expectedGrams) {
+            int hash = tokenHash(s, 1);
+            expectedHashedGrams.add(hash);
+        }
+
+        int tokenCount = 0;
+
+        while (tokenizer.hasNext()) {
+            tokenizer.next();
+
+            // serialize hashed token
+            GrowableArray tokenData = new GrowableArray();
+
+            IToken token = tokenizer.getToken();
+            token.serializeToken(tokenData);
+
+            // deserialize token
+            ByteArrayInputStream bais = new ByteArrayInputStream(tokenData.getByteArray());
+            DataInput in = new DataInputStream(bais);
+
+            Integer hashedGram = in.readInt();
+
+            // System.out.println(hashedGram);
+
+            Assert.assertEquals(expectedHashedGrams.get(tokenCount), hashedGram);
+
+            tokenCount++;
+        }
+        // System.out.println("---------");
+    }
+
+    void runTestNGramTokenizerWithUTF8Tokens(boolean prePost) throws IOException {
+        UTF8NGramTokenFactory tokenFactory = new UTF8NGramTokenFactory();
+        NGramUTF8StringBinaryTokenizer tokenizer = new NGramUTF8StringBinaryTokenizer(gramLength, prePost, true, false,
+                tokenFactory);
+        tokenizer.reset(inputBuffer, 0, inputBuffer.length);
+
+        ArrayList<String> expectedGrams = new ArrayList<String>();
+        getExpectedGrams(str, gramLength, expectedGrams, prePost);
+
+        int tokenCount = 0;
+
+        while (tokenizer.hasNext()) {
+            tokenizer.next();
+
+            // serialize hashed token
+            GrowableArray tokenData = new GrowableArray();
+
+            IToken token = tokenizer.getToken();
+            token.serializeToken(tokenData);
+
+            // deserialize token
+            ByteArrayInputStream bais = new ByteArrayInputStream(tokenData.getByteArray());
+            DataInput in = new DataInputStream(bais);
+
+            String strGram = in.readUTF();
+
+            // System.out.println("\"" + strGram + "\"");
+
+            Assert.assertEquals(expectedGrams.get(tokenCount), strGram);
+
+            tokenCount++;
+        }
+        // System.out.println("---------");
+    }
+
+    @Test
+    public void testNGramTokenizerWithCountedHashedUTF8Tokens() throws Exception {
+        runTestNGramTokenizerWithCountedHashedUTF8Tokens(false);
+        runTestNGramTokenizerWithCountedHashedUTF8Tokens(true);
+    }
+
+    @Test
+    public void testNGramTokenizerWithHashedUTF8Tokens() throws Exception {
+        runTestNGramTokenizerWithHashedUTF8Tokens(false);
+        runTestNGramTokenizerWithHashedUTF8Tokens(true);
+    }
+
+    @Test
+    public void testNGramTokenizerWithUTF8Tokens() throws IOException {
+        runTestNGramTokenizerWithUTF8Tokens(false);
+        runTestNGramTokenizerWithUTF8Tokens(true);
+    }
+
+    public int tokenHash(String token, int tokenCount) {
+        int h = AbstractUTF8Token.GOLDEN_RATIO_32;
+        for (int i = 0; i < token.length(); i++) {
+            h ^= token.charAt(i);
+            h *= AbstractUTF8Token.GOLDEN_RATIO_32;
+        }
+        return h + tokenCount;
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/WordTokenizerTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/WordTokenizerTest.java
new file mode 100644
index 0000000..3ff9304
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/tokenizers/WordTokenizerTest.java
@@ -0,0 +1,210 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInput;
+import java.io.DataInputStream;
+import java.io.DataOutput;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+
+import junit.framework.Assert;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import edu.uci.ics.hyracks.data.std.util.GrowableArray;
+
+public class WordTokenizerTest {
+
+    private String text = "Hello World, I would like to inform you of the importance of Foo Bar. Yes, Foo Bar. Jürgen.";
+    private byte[] inputBuffer;
+
+    private ArrayList<String> expectedUTF8Tokens = new ArrayList<String>();
+    private ArrayList<Integer> expectedHashedUTF8Tokens = new ArrayList<Integer>();
+    private ArrayList<Integer> expectedCountedHashedUTF8Tokens = new ArrayList<Integer>();
+
+    private boolean isSeparator(char c) {
+        return !(Character.isLetterOrDigit(c) || Character.getType(c) == Character.OTHER_LETTER || Character.getType(c) == Character.OTHER_NUMBER);
+    }
+
+    private void tokenize(String text, ArrayList<String> tokens) {
+        String lowerCaseText = text.toLowerCase();
+        int startIx = 0;
+
+        // Skip separators at beginning of string.
+        while (isSeparator(lowerCaseText.charAt(startIx))) {
+            startIx++;
+        }
+        while (startIx < lowerCaseText.length()) {
+            while (startIx < lowerCaseText.length() && isSeparator(lowerCaseText.charAt(startIx))) {
+                startIx++;
+            }
+            int tokenStart = startIx;
+
+            while (startIx < lowerCaseText.length() && !isSeparator(lowerCaseText.charAt(startIx))) {
+                startIx++;
+            }
+            int tokenEnd = startIx;
+
+            // Emit token.
+            String token = lowerCaseText.substring(tokenStart, tokenEnd);
+
+            tokens.add(token);
+        }
+    }
+
+    @Before
+    public void init() throws IOException {
+        // serialize text into bytes
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        DataOutput dos = new DataOutputStream(baos);
+        dos.writeUTF(text);
+        inputBuffer = baos.toByteArray();
+
+        // init expected string tokens
+        tokenize(text, expectedUTF8Tokens);
+
+        // hashed tokens ignoring token count
+        for (int i = 0; i < expectedUTF8Tokens.size(); i++) {
+            int hash = tokenHash(expectedUTF8Tokens.get(i), 1);
+            expectedHashedUTF8Tokens.add(hash);
+        }
+
+        // hashed tokens using token count
+        HashMap<String, Integer> tokenCounts = new HashMap<String, Integer>();
+        for (int i = 0; i < expectedUTF8Tokens.size(); i++) {
+            Integer count = tokenCounts.get(expectedUTF8Tokens.get(i));
+            if (count == null) {
+                count = 1;
+                tokenCounts.put(expectedUTF8Tokens.get(i), count);
+            } else {
+                count++;
+            }
+
+            int hash = tokenHash(expectedUTF8Tokens.get(i), count);
+            expectedCountedHashedUTF8Tokens.add(hash);
+        }
+    }
+
+    @Test
+    public void testWordTokenizerWithCountedHashedUTF8Tokens() throws IOException {
+
+        HashedUTF8WordTokenFactory tokenFactory = new HashedUTF8WordTokenFactory();
+        DelimitedUTF8StringBinaryTokenizer tokenizer = new DelimitedUTF8StringBinaryTokenizer(false, false,
+                tokenFactory);
+
+        tokenizer.reset(inputBuffer, 0, inputBuffer.length);
+
+        int tokenCount = 0;
+
+        while (tokenizer.hasNext()) {
+            tokenizer.next();
+
+            // serialize hashed token
+            GrowableArray tokenData = new GrowableArray();
+
+            IToken token = tokenizer.getToken();
+            token.serializeToken(tokenData);
+
+            // deserialize token
+            ByteArrayInputStream bais = new ByteArrayInputStream(tokenData.getByteArray());
+            DataInput in = new DataInputStream(bais);
+
+            Integer hashedToken = in.readInt();
+
+            Assert.assertEquals(hashedToken, expectedCountedHashedUTF8Tokens.get(tokenCount));
+
+            tokenCount++;
+        }
+    }
+
+    @Test
+    public void testWordTokenizerWithHashedUTF8Tokens() throws IOException {
+
+        HashedUTF8WordTokenFactory tokenFactory = new HashedUTF8WordTokenFactory();
+        DelimitedUTF8StringBinaryTokenizer tokenizer = new DelimitedUTF8StringBinaryTokenizer(true, false, tokenFactory);
+
+        tokenizer.reset(inputBuffer, 0, inputBuffer.length);
+
+        int tokenCount = 0;
+
+        while (tokenizer.hasNext()) {
+            tokenizer.next();
+
+            // serialize hashed token
+            GrowableArray tokenData = new GrowableArray();
+
+            IToken token = tokenizer.getToken();
+            token.serializeToken(tokenData);
+
+            // deserialize token
+            ByteArrayInputStream bais = new ByteArrayInputStream(tokenData.getByteArray());
+            DataInput in = new DataInputStream(bais);
+
+            Integer hashedToken = in.readInt();
+
+            Assert.assertEquals(expectedHashedUTF8Tokens.get(tokenCount), hashedToken);
+
+            tokenCount++;
+        }
+    }
+
+    @Test
+    public void testWordTokenizerWithUTF8Tokens() throws IOException {
+
+        UTF8WordTokenFactory tokenFactory = new UTF8WordTokenFactory();
+        DelimitedUTF8StringBinaryTokenizer tokenizer = new DelimitedUTF8StringBinaryTokenizer(true, false, tokenFactory);
+
+        tokenizer.reset(inputBuffer, 0, inputBuffer.length);
+
+        int tokenCount = 0;
+
+        while (tokenizer.hasNext()) {
+            tokenizer.next();
+
+            // serialize hashed token
+            GrowableArray tokenData = new GrowableArray();
+
+            IToken token = tokenizer.getToken();
+            token.serializeToken(tokenData);
+
+            // deserialize token
+            ByteArrayInputStream bais = new ByteArrayInputStream(tokenData.getByteArray());
+            DataInput in = new DataInputStream(bais);
+
+            String strToken = in.readUTF();
+
+            Assert.assertEquals(expectedUTF8Tokens.get(tokenCount), strToken);
+
+            tokenCount++;
+        }
+    }
+
+    // JAQL Hash
+    public int tokenHash(String token, int tokenCount) {
+        int h = AbstractUTF8Token.GOLDEN_RATIO_32;
+        for (int i = 0; i < token.length(); i++) {
+            h ^= token.charAt(i);
+            h *= AbstractUTF8Token.GOLDEN_RATIO_32;
+        }
+        return h + tokenCount;
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/LSMInvertedIndexTestContext.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/LSMInvertedIndexTestContext.java
new file mode 100644
index 0000000..870e6d9
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/LSMInvertedIndexTestContext.java
@@ -0,0 +1,249 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util;
+
+import java.io.ByteArrayInputStream;
+import java.io.DataInput;
+import java.io.DataInputStream;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
+import edu.uci.ics.hyracks.dataflow.common.util.TupleUtils;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.common.CheckTuple;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.LSMInvertedIndexTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.exceptions.InvertedIndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+
+@SuppressWarnings("rawtypes")
+public class LSMInvertedIndexTestContext extends OrderedIndexTestContext {
+
+    public static enum InvertedIndexType {
+        INMEMORY,
+        ONDISK,
+        LSM,
+        PARTITIONED_INMEMORY,
+        PARTITIONED_ONDISK,
+        PARTITIONED_LSM
+    };
+
+    protected IInvertedIndex invIndex;
+    protected IBinaryComparatorFactory[] allCmpFactories;
+    protected IBinaryTokenizerFactory tokenizerFactory;
+    protected InvertedIndexType invIndexType;
+    protected InvertedIndexTokenizingTupleIterator indexTupleIter;
+    protected HashSet<Comparable> allTokens = new HashSet<Comparable>();
+    protected List<ITupleReference> documentCorpus = new ArrayList<ITupleReference>();
+
+    public LSMInvertedIndexTestContext(ISerializerDeserializer[] fieldSerdes, IIndex index,
+            IBinaryTokenizerFactory tokenizerFactory, InvertedIndexType invIndexType,
+            InvertedIndexTokenizingTupleIterator indexTupleIter) {
+        super(fieldSerdes, index);
+        invIndex = (IInvertedIndex) index;
+        this.tokenizerFactory = tokenizerFactory;
+        this.invIndexType = invIndexType;
+        this.indexTupleIter = indexTupleIter;
+    }
+
+    @Override
+    public int getKeyFieldCount() {
+        return fieldSerdes.length;
+    }
+
+    @Override
+    public IBinaryComparatorFactory[] getComparatorFactories() {
+        if (allCmpFactories == null) {
+            // Concatenate token and inv-list comparators.
+            IInvertedIndex invIndex = (IInvertedIndex) index;
+            IBinaryComparatorFactory[] tokenCmpFactories = invIndex.getTokenCmpFactories();
+            IBinaryComparatorFactory[] invListCmpFactories = invIndex.getInvListCmpFactories();
+            int totalCmpCount = tokenCmpFactories.length + invListCmpFactories.length;
+            allCmpFactories = new IBinaryComparatorFactory[totalCmpCount];
+            for (int i = 0; i < tokenCmpFactories.length; i++) {
+                allCmpFactories[i] = tokenCmpFactories[i];
+            }
+            for (int i = 0; i < invListCmpFactories.length; i++) {
+                allCmpFactories[i + tokenCmpFactories.length] = invListCmpFactories[i];
+            }
+        }
+        return allCmpFactories;
+    }
+
+    public static LSMInvertedIndexTestContext create(LSMInvertedIndexTestHarness harness,
+            ISerializerDeserializer[] fieldSerdes, int tokenFieldCount, IBinaryTokenizerFactory tokenizerFactory,
+            InvertedIndexType invIndexType) throws IndexException {
+        ITypeTraits[] allTypeTraits = SerdeUtils.serdesToTypeTraits(fieldSerdes);
+        IBinaryComparatorFactory[] allCmpFactories = SerdeUtils.serdesToComparatorFactories(fieldSerdes,
+                fieldSerdes.length);
+        // Set token type traits and comparators.
+        ITypeTraits[] tokenTypeTraits = new ITypeTraits[tokenFieldCount];
+        IBinaryComparatorFactory[] tokenCmpFactories = new IBinaryComparatorFactory[tokenFieldCount];
+        for (int i = 0; i < tokenTypeTraits.length; i++) {
+            tokenTypeTraits[i] = allTypeTraits[i];
+            tokenCmpFactories[i] = allCmpFactories[i];
+        }
+        // Set inverted-list element type traits and comparators.
+        int invListFieldCount = fieldSerdes.length - tokenFieldCount;
+        ITypeTraits[] invListTypeTraits = new ITypeTraits[invListFieldCount];
+        IBinaryComparatorFactory[] invListCmpFactories = new IBinaryComparatorFactory[invListFieldCount];
+        for (int i = 0; i < invListTypeTraits.length; i++) {
+            invListTypeTraits[i] = allTypeTraits[i + tokenFieldCount];
+            invListCmpFactories[i] = allCmpFactories[i + tokenFieldCount];
+        }
+        // Create index and test context.        
+        IInvertedIndex invIndex;
+        switch (invIndexType) {
+            case INMEMORY: {
+                invIndex = InvertedIndexUtils.createInMemoryBTreeInvertedindex(harness.getMemBufferCache(),
+                        harness.getMemFreePageManager(), invListTypeTraits, invListCmpFactories, tokenTypeTraits,
+                        tokenCmpFactories, tokenizerFactory);
+                break;
+            }
+            case PARTITIONED_INMEMORY: {
+                invIndex = InvertedIndexUtils.createPartitionedInMemoryBTreeInvertedindex(harness.getMemBufferCache(),
+                        harness.getMemFreePageManager(), invListTypeTraits, invListCmpFactories, tokenTypeTraits,
+                        tokenCmpFactories, tokenizerFactory);
+                break;
+            }
+            case ONDISK: {
+                invIndex = InvertedIndexUtils.createOnDiskInvertedIndex(harness.getDiskBufferCache(),
+                        harness.getDiskFileMapProvider(), invListTypeTraits, invListCmpFactories, tokenTypeTraits,
+                        tokenCmpFactories, harness.getInvListsFileRef());
+                break;
+            }
+            case PARTITIONED_ONDISK: {
+                invIndex = InvertedIndexUtils.createPartitionedOnDiskInvertedIndex(harness.getDiskBufferCache(),
+                        harness.getDiskFileMapProvider(), invListTypeTraits, invListCmpFactories, tokenTypeTraits,
+                        tokenCmpFactories, harness.getInvListsFileRef());
+                break;
+            }
+            case LSM: {
+                invIndex = InvertedIndexUtils.createLSMInvertedIndex(harness.getMemBufferCache(),
+                        harness.getMemFreePageManager(), harness.getDiskFileMapProvider(), invListTypeTraits,
+                        invListCmpFactories, tokenTypeTraits, tokenCmpFactories, tokenizerFactory,
+                        harness.getDiskBufferCache(), harness.getIOManager(), harness.getOnDiskDir(),
+                        harness.getMergePolicy(), harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                        harness.getIOOperationCallbackProvider());
+                break;
+            }
+            case PARTITIONED_LSM: {
+                invIndex = InvertedIndexUtils.createPartitionedLSMInvertedIndex(harness.getMemBufferCache(),
+                        harness.getMemFreePageManager(), harness.getDiskFileMapProvider(), invListTypeTraits,
+                        invListCmpFactories, tokenTypeTraits, tokenCmpFactories, tokenizerFactory,
+                        harness.getDiskBufferCache(), harness.getIOManager(), harness.getOnDiskDir(),
+                        harness.getMergePolicy(), harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                        harness.getIOOperationCallbackProvider());
+                break;
+            }
+            default: {
+                throw new InvertedIndexException("Unknow inverted-index type '" + invIndexType + "'.");
+            }
+        }
+        InvertedIndexTokenizingTupleIterator indexTupleIter = null;
+        switch (invIndexType) {
+            case INMEMORY:
+            case ONDISK:
+            case LSM: {
+                indexTupleIter = new InvertedIndexTokenizingTupleIterator(invIndex.getTokenTypeTraits().length,
+                        invIndex.getInvListTypeTraits().length, tokenizerFactory.createTokenizer());
+                break;
+            }
+            case PARTITIONED_INMEMORY:
+            case PARTITIONED_ONDISK:
+            case PARTITIONED_LSM: {
+                indexTupleIter = new PartitionedInvertedIndexTokenizingTupleIterator(
+                        invIndex.getTokenTypeTraits().length, invIndex.getInvListTypeTraits().length,
+                        tokenizerFactory.createTokenizer());
+                break;
+            }
+            default: {
+                throw new InvertedIndexException("Unknow inverted-index type '" + invIndexType + "'.");
+            }
+        }
+        LSMInvertedIndexTestContext testCtx = new LSMInvertedIndexTestContext(fieldSerdes, invIndex, tokenizerFactory,
+                invIndexType, indexTupleIter);
+        return testCtx;
+    }
+
+    public void insertCheckTuples(ITupleReference tuple, Collection<CheckTuple> checkTuples)
+            throws HyracksDataException {
+        documentCorpus.add(TupleUtils.copyTuple(tuple));
+        indexTupleIter.reset(tuple);
+        while (indexTupleIter.hasNext()) {
+            indexTupleIter.next();
+            ITupleReference insertTuple = indexTupleIter.getTuple();
+            CheckTuple checkTuple = createCheckTuple(insertTuple);
+            insertCheckTuple(checkTuple, checkTuples);
+            allTokens.add(checkTuple.getField(0));
+        }
+    }
+
+    public void deleteCheckTuples(ITupleReference tuple, Collection<CheckTuple> checkTuples)
+            throws HyracksDataException {
+        indexTupleIter.reset(tuple);
+        while (indexTupleIter.hasNext()) {
+            indexTupleIter.next();
+            ITupleReference insertTuple = indexTupleIter.getTuple();
+            CheckTuple checkTuple = createCheckTuple(insertTuple);
+            deleteCheckTuple(checkTuple, checkTuples);
+        }
+    }
+
+    public HashSet<Comparable> getAllTokens() {
+        return allTokens;
+    }
+
+    @SuppressWarnings("unchecked")
+    public CheckTuple createCheckTuple(ITupleReference tuple) throws HyracksDataException {
+        CheckTuple checkTuple = new CheckTuple(fieldSerdes.length, fieldSerdes.length);
+        for (int i = 0; i < fieldSerdes.length; i++) {
+            ByteArrayInputStream bains = new ByteArrayInputStream(tuple.getFieldData(i), tuple.getFieldStart(i),
+                    tuple.getFieldLength(i));
+            DataInput in = new DataInputStream(bains);
+            Comparable field = (Comparable) fieldSerdes[i].deserialize(in);
+            checkTuple.appendField(field);
+        }
+        return checkTuple;
+    }
+
+    @Override
+    public void upsertCheckTuple(CheckTuple checkTuple, Collection<CheckTuple> checkTuples) {
+        throw new UnsupportedOperationException("Upsert not supported by inverted index.");
+    }
+
+    public IBinaryTokenizerFactory getTokenizerFactory() {
+        return tokenizerFactory;
+    }
+
+    public List<ITupleReference> getDocumentCorpus() {
+        return documentCorpus;
+    }
+
+    public InvertedIndexType getInvertedIndexType() {
+        return invIndexType;
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/LSMInvertedIndexTestUtils.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/LSMInvertedIndexTestUtils.java
new file mode 100644
index 0000000..97f78f3
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/util/LSMInvertedIndexTestUtils.java
@@ -0,0 +1,568 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util;
+
+import static org.junit.Assert.fail;
+
+import java.io.ByteArrayInputStream;
+import java.io.DataInput;
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Random;
+import java.util.SortedSet;
+import java.util.TreeSet;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.util.GrowableArray;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.ShortSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestUtils;
+import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate;
+import edu.uci.ics.hyracks.storage.am.common.CheckTuple;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DocumentStringFieldValueGenerator;
+import edu.uci.ics.hyracks.storage.am.common.datagen.IFieldValueGenerator;
+import edu.uci.ics.hyracks.storage.am.common.datagen.PersonNameFieldValueGenerator;
+import edu.uci.ics.hyracks.storage.am.common.datagen.SortedIntegerFieldValueGenerator;
+import edu.uci.ics.hyracks.storage.am.common.datagen.TupleGenerator;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingTupleReference;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedListCursor;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common.LSMInvertedIndexTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.exceptions.OccurrenceThresholdPanicException;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.InvertedIndexSearchPredicate;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.DelimitedUTF8StringBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.HashedUTF8NGramTokenFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.HashedUTF8WordTokenFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizer;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IToken;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.ITokenFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.NGramUTF8StringBinaryTokenizerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.UTF8NGramTokenFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.UTF8WordTokenFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
+
+@SuppressWarnings("rawtypes")
+public class LSMInvertedIndexTestUtils {
+
+    public static final int TEST_GRAM_LENGTH = 3;
+
+    public static TupleGenerator createStringDocumentTupleGen(Random rnd) throws IOException {
+        IFieldValueGenerator[] fieldGens = new IFieldValueGenerator[2];
+        fieldGens[0] = new DocumentStringFieldValueGenerator(2, 10, 10000, rnd);
+        fieldGens[1] = new SortedIntegerFieldValueGenerator(0);
+        ISerializerDeserializer[] fieldSerdes = new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE };
+        TupleGenerator tupleGen = new TupleGenerator(fieldGens, fieldSerdes, 0);
+        return tupleGen;
+    }
+
+    public static TupleGenerator createPersonNamesTupleGen(Random rnd) throws IOException {
+        IFieldValueGenerator[] fieldGens = new IFieldValueGenerator[2];
+        fieldGens[0] = new PersonNameFieldValueGenerator(rnd, 0.5f);
+        fieldGens[1] = new SortedIntegerFieldValueGenerator(0);
+        ISerializerDeserializer[] fieldSerdes = new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE };
+        TupleGenerator tupleGen = new TupleGenerator(fieldGens, fieldSerdes, 0);
+        return tupleGen;
+    }
+
+    private static ISerializerDeserializer[] getNonHashedIndexFieldSerdes(InvertedIndexType invIndexType)
+            throws IndexException {
+        ISerializerDeserializer[] fieldSerdes = null;
+        switch (invIndexType) {
+            case INMEMORY:
+            case ONDISK:
+            case LSM: {
+                fieldSerdes = new ISerializerDeserializer[] { UTF8StringSerializerDeserializer.INSTANCE,
+                        IntegerSerializerDeserializer.INSTANCE };
+                break;
+            }
+            case PARTITIONED_INMEMORY:
+            case PARTITIONED_ONDISK:
+            case PARTITIONED_LSM: {
+                // Such indexes also include the set-size for partitioning.
+                fieldSerdes = new ISerializerDeserializer[] { UTF8StringSerializerDeserializer.INSTANCE,
+                        ShortSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE };
+                break;
+            }
+            default: {
+                throw new IndexException("Unhandled inverted index type '" + invIndexType + "'.");
+            }
+        }
+        return fieldSerdes;
+    }
+
+    private static ISerializerDeserializer[] getHashedIndexFieldSerdes(InvertedIndexType invIndexType)
+            throws IndexException {
+        ISerializerDeserializer[] fieldSerdes = null;
+        switch (invIndexType) {
+            case INMEMORY:
+            case ONDISK:
+            case LSM: {
+                fieldSerdes = new ISerializerDeserializer[] { IntegerSerializerDeserializer.INSTANCE,
+                        IntegerSerializerDeserializer.INSTANCE };
+                break;
+            }
+            case PARTITIONED_INMEMORY:
+            case PARTITIONED_ONDISK:
+            case PARTITIONED_LSM: {
+                // Such indexes also include the set-size for partitioning.
+                fieldSerdes = new ISerializerDeserializer[] { IntegerSerializerDeserializer.INSTANCE,
+                        ShortSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE };
+                break;
+            }
+            default: {
+                throw new IndexException("Unhandled inverted index type '" + invIndexType + "'.");
+            }
+        }
+        return fieldSerdes;
+    }
+
+    public static LSMInvertedIndexTestContext createWordInvIndexTestContext(LSMInvertedIndexTestHarness harness,
+            InvertedIndexType invIndexType) throws IOException, IndexException {
+        ISerializerDeserializer[] fieldSerdes = getNonHashedIndexFieldSerdes(invIndexType);
+        ITokenFactory tokenFactory = new UTF8WordTokenFactory();
+        IBinaryTokenizerFactory tokenizerFactory = new DelimitedUTF8StringBinaryTokenizerFactory(true, false,
+                tokenFactory);
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestContext.create(harness, fieldSerdes,
+                fieldSerdes.length - 1, tokenizerFactory, invIndexType);
+        return testCtx;
+    }
+
+    public static LSMInvertedIndexTestContext createHashedWordInvIndexTestContext(LSMInvertedIndexTestHarness harness,
+            InvertedIndexType invIndexType) throws IOException, IndexException {
+        ISerializerDeserializer[] fieldSerdes = getHashedIndexFieldSerdes(invIndexType);
+        ITokenFactory tokenFactory = new HashedUTF8WordTokenFactory();
+        IBinaryTokenizerFactory tokenizerFactory = new DelimitedUTF8StringBinaryTokenizerFactory(true, false,
+                tokenFactory);
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestContext.create(harness, fieldSerdes,
+                fieldSerdes.length - 1, tokenizerFactory, invIndexType);
+        return testCtx;
+    }
+
+    public static LSMInvertedIndexTestContext createNGramInvIndexTestContext(LSMInvertedIndexTestHarness harness,
+            InvertedIndexType invIndexType) throws IOException, IndexException {
+        ISerializerDeserializer[] fieldSerdes = getNonHashedIndexFieldSerdes(invIndexType);
+        ITokenFactory tokenFactory = new UTF8NGramTokenFactory();
+        IBinaryTokenizerFactory tokenizerFactory = new NGramUTF8StringBinaryTokenizerFactory(TEST_GRAM_LENGTH, true,
+                true, false, tokenFactory);
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestContext.create(harness, fieldSerdes,
+                fieldSerdes.length - 1, tokenizerFactory, invIndexType);
+        return testCtx;
+    }
+
+    public static LSMInvertedIndexTestContext createHashedNGramInvIndexTestContext(LSMInvertedIndexTestHarness harness,
+            InvertedIndexType invIndexType) throws IOException, IndexException {
+        ISerializerDeserializer[] fieldSerdes = getHashedIndexFieldSerdes(invIndexType);
+        ITokenFactory tokenFactory = new HashedUTF8NGramTokenFactory();
+        IBinaryTokenizerFactory tokenizerFactory = new NGramUTF8StringBinaryTokenizerFactory(TEST_GRAM_LENGTH, true,
+                true, false, tokenFactory);
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestContext.create(harness, fieldSerdes,
+                fieldSerdes.length - 1, tokenizerFactory, invIndexType);
+        return testCtx;
+    }
+
+    public static void bulkLoadInvIndex(LSMInvertedIndexTestContext testCtx, TupleGenerator tupleGen, int numDocs)
+            throws IndexException, IOException {
+        SortedSet<CheckTuple> tmpMemIndex = new TreeSet<CheckTuple>();
+        // First generate the expected index by inserting the documents one-by-one.
+        for (int i = 0; i < numDocs; i++) {
+            ITupleReference tuple = tupleGen.next();
+            testCtx.insertCheckTuples(tuple, tmpMemIndex);
+        }
+        ISerializerDeserializer[] fieldSerdes = testCtx.getFieldSerdes();
+
+        // Use the expected index to bulk-load the actual index.
+        IIndexBulkLoader bulkLoader = testCtx.getIndex().createBulkLoader(1.0f, false, numDocs);
+        ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(testCtx.getFieldSerdes().length);
+        ArrayTupleReference tuple = new ArrayTupleReference();
+        Iterator<CheckTuple> checkTupleIter = tmpMemIndex.iterator();
+        while (checkTupleIter.hasNext()) {
+            CheckTuple checkTuple = checkTupleIter.next();
+            OrderedIndexTestUtils.createTupleFromCheckTuple(checkTuple, tupleBuilder, tuple, fieldSerdes);
+            bulkLoader.add(tuple);
+        }
+        bulkLoader.end();
+
+        // Add all check tuples from the temp index to the text context.
+        testCtx.getCheckTuples().addAll(tmpMemIndex);
+    }
+
+    public static void insertIntoInvIndex(LSMInvertedIndexTestContext testCtx, TupleGenerator tupleGen, int numDocs)
+            throws IOException, IndexException {
+        // InMemoryInvertedIndex only supports insert.
+        for (int i = 0; i < numDocs; i++) {
+            ITupleReference tuple = tupleGen.next();
+            testCtx.getIndexAccessor().insert(tuple);
+            testCtx.insertCheckTuples(tuple, testCtx.getCheckTuples());
+        }
+    }
+
+    public static void deleteFromInvIndex(LSMInvertedIndexTestContext testCtx, Random rnd, int numDocsToDelete)
+            throws HyracksDataException, IndexException {
+        List<ITupleReference> documentCorpus = testCtx.getDocumentCorpus();
+        for (int i = 0; i < numDocsToDelete && !documentCorpus.isEmpty(); i++) {
+            int size = documentCorpus.size();
+            int tupleIndex = Math.abs(rnd.nextInt()) % size;
+            ITupleReference deleteTuple = documentCorpus.get(tupleIndex);
+            testCtx.getIndexAccessor().delete(deleteTuple);
+            testCtx.deleteCheckTuples(deleteTuple, testCtx.getCheckTuples());
+            // Swap tupleIndex with last element.
+            documentCorpus.set(tupleIndex, documentCorpus.get(size - 1));
+            documentCorpus.remove(size - 1);
+        }
+    }
+
+    /**
+     * Compares actual and expected indexes using the rangeSearch() method of the inverted-index accessor.
+     */
+    public static void compareActualAndExpectedIndexesRangeSearch(LSMInvertedIndexTestContext testCtx)
+            throws HyracksDataException, IndexException {
+        IInvertedIndex invIndex = (IInvertedIndex) testCtx.getIndex();
+        int tokenFieldCount = invIndex.getTokenTypeTraits().length;
+        int invListFieldCount = invIndex.getInvListTypeTraits().length;
+        IInvertedIndexAccessor invIndexAccessor = (IInvertedIndexAccessor) invIndex.createAccessor(
+                NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        IIndexCursor invIndexCursor = invIndexAccessor.createRangeSearchCursor();
+        MultiComparator tokenCmp = MultiComparator.create(invIndex.getTokenCmpFactories());
+        IBinaryComparatorFactory[] tupleCmpFactories = new IBinaryComparatorFactory[tokenFieldCount + invListFieldCount];
+        for (int i = 0; i < tokenFieldCount; i++) {
+            tupleCmpFactories[i] = invIndex.getTokenCmpFactories()[i];
+        }
+        for (int i = 0; i < invListFieldCount; i++) {
+            tupleCmpFactories[tokenFieldCount + i] = invIndex.getInvListCmpFactories()[i];
+        }
+        MultiComparator tupleCmp = MultiComparator.create(tupleCmpFactories);
+        RangePredicate nullPred = new RangePredicate(null, null, true, true, tokenCmp, tokenCmp);
+        invIndexAccessor.rangeSearch(invIndexCursor, nullPred);
+
+        // Helpers for generating a serialized inverted-list element from a CheckTuple from the expected index.
+        ISerializerDeserializer[] fieldSerdes = testCtx.getFieldSerdes();
+        ArrayTupleBuilder expectedBuilder = new ArrayTupleBuilder(fieldSerdes.length);
+        ArrayTupleReference expectedTuple = new ArrayTupleReference();
+
+        Iterator<CheckTuple> expectedIter = testCtx.getCheckTuples().iterator();
+
+        // Compare index elements.
+        try {
+            while (invIndexCursor.hasNext() && expectedIter.hasNext()) {
+                invIndexCursor.next();
+                ITupleReference actualTuple = invIndexCursor.getTuple();
+                CheckTuple expected = expectedIter.next();
+                OrderedIndexTestUtils.createTupleFromCheckTuple(expected, expectedBuilder, expectedTuple, fieldSerdes);
+                if (tupleCmp.compare(actualTuple, expectedTuple) != 0) {
+                    fail("Index entries differ for token '" + expected.getField(0) + "'.");
+                }
+            }
+            if (expectedIter.hasNext()) {
+                fail("Indexes do not match. Actual index is missing entries.");
+            }
+            if (invIndexCursor.hasNext()) {
+                fail("Indexes do not match. Actual index contains too many entries.");
+            }
+        } finally {
+            invIndexCursor.close();
+        }
+    }
+
+    /**
+     * Compares actual and expected indexes by comparing their inverted-lists one by one. Exercises the openInvertedListCursor() method of the inverted-index accessor.
+     */
+    @SuppressWarnings("unchecked")
+    public static void compareActualAndExpectedIndexes(LSMInvertedIndexTestContext testCtx)
+            throws HyracksDataException, IndexException {
+        IInvertedIndex invIndex = (IInvertedIndex) testCtx.getIndex();
+        ISerializerDeserializer[] fieldSerdes = testCtx.getFieldSerdes();
+        MultiComparator invListCmp = MultiComparator.create(invIndex.getInvListCmpFactories());
+        IInvertedIndexAccessor invIndexAccessor = (IInvertedIndexAccessor) testCtx.getIndexAccessor();
+        int tokenFieldCount = invIndex.getTokenTypeTraits().length;
+        int invListFieldCount = invIndex.getInvListTypeTraits().length;
+        // All tokens that were inserted into the indexes.
+        Iterator<Comparable> tokensIter = testCtx.getAllTokens().iterator();
+
+        // Search key for finding an inverted-list in the actual index.
+        ArrayTupleBuilder searchKeyBuilder = new ArrayTupleBuilder(tokenFieldCount);
+        ArrayTupleReference searchKey = new ArrayTupleReference();
+        // Cursor over inverted list from actual index.
+        IInvertedListCursor actualInvListCursor = invIndexAccessor.createInvertedListCursor();
+
+        // Helpers for generating a serialized inverted-list element from a CheckTuple from the expected index.
+        ArrayTupleBuilder expectedBuilder = new ArrayTupleBuilder(fieldSerdes.length);
+        // Includes the token fields.
+        ArrayTupleReference completeExpectedTuple = new ArrayTupleReference();
+        // Field permutation and permuting tuple reference to strip away token fields from completeExpectedTuple.
+        int[] fieldPermutation = new int[invListFieldCount];
+        for (int i = 0; i < fieldPermutation.length; i++) {
+            fieldPermutation[i] = tokenFieldCount + i;
+        }
+        PermutingTupleReference expectedTuple = new PermutingTupleReference(fieldPermutation);
+
+        // Iterate over all tokens. Find the inverted-lists in actual and expected indexes. Compare the inverted lists,
+        while (tokensIter.hasNext()) {
+            Comparable token = tokensIter.next();
+
+            // Position inverted-list iterator on expected index.
+            CheckTuple checkLowKey = new CheckTuple(tokenFieldCount, tokenFieldCount);
+            checkLowKey.appendField(token);
+            CheckTuple checkHighKey = new CheckTuple(tokenFieldCount, tokenFieldCount);
+            checkHighKey.appendField(token);
+
+            SortedSet<CheckTuple> expectedInvList = OrderedIndexTestUtils.getPrefixExpectedSubset(
+                    testCtx.getCheckTuples(), checkLowKey, checkHighKey);
+            Iterator<CheckTuple> expectedInvListIter = expectedInvList.iterator();
+
+            // Position inverted-list cursor in actual index.
+            OrderedIndexTestUtils.createTupleFromCheckTuple(checkLowKey, searchKeyBuilder, searchKey, fieldSerdes);
+            invIndexAccessor.openInvertedListCursor(actualInvListCursor, searchKey);
+
+            if (actualInvListCursor.size() != expectedInvList.size()) {
+                fail("Actual and expected inverted lists for token '" + token.toString()
+                        + "' have different sizes. Actual size: " + actualInvListCursor.size() + ". Expected size: "
+                        + expectedInvList.size() + ".");
+            }
+            // Compare inverted-list elements.
+            int count = 0;
+            actualInvListCursor.pinPages();
+            try {
+                while (actualInvListCursor.hasNext() && expectedInvListIter.hasNext()) {
+                    actualInvListCursor.next();
+                    ITupleReference actual = actualInvListCursor.getTuple();
+                    CheckTuple expected = expectedInvListIter.next();
+                    OrderedIndexTestUtils.createTupleFromCheckTuple(expected, expectedBuilder, completeExpectedTuple,
+                            fieldSerdes);
+                    expectedTuple.reset(completeExpectedTuple);
+                    if (invListCmp.compare(actual, expectedTuple) != 0) {
+                        fail("Inverted lists of token '" + token + "' differ at position " + count + ".");
+                    }
+                    count++;
+                }
+            } finally {
+                actualInvListCursor.unpinPages();
+            }
+        }
+    }
+
+    /**
+     * Determine the expected results with the simple ScanCount algorithm.
+     */
+    public static void getExpectedResults(int[] scanCountArray, TreeSet<CheckTuple> checkTuples,
+            ITupleReference searchDocument, IBinaryTokenizer tokenizer, ISerializerDeserializer tokenSerde,
+            IInvertedIndexSearchModifier searchModifier, List<Integer> expectedResults, InvertedIndexType invIndexType)
+            throws IOException {
+        boolean isPartitioned = false;
+        switch (invIndexType) {
+            case INMEMORY:
+            case ONDISK:
+            case LSM: {
+                isPartitioned = false;
+                break;
+            }
+            case PARTITIONED_INMEMORY:
+            case PARTITIONED_ONDISK:
+            case PARTITIONED_LSM: {
+                isPartitioned = true;
+                break;
+            }
+        }
+        getExpectedResults(scanCountArray, checkTuples, searchDocument, tokenizer, tokenSerde, searchModifier,
+                expectedResults, isPartitioned);
+    }
+
+    @SuppressWarnings("unchecked")
+    public static void getExpectedResults(int[] scanCountArray, TreeSet<CheckTuple> checkTuples,
+            ITupleReference searchDocument, IBinaryTokenizer tokenizer, ISerializerDeserializer tokenSerde,
+            IInvertedIndexSearchModifier searchModifier, List<Integer> expectedResults, boolean isPartitioned)
+            throws IOException {
+        // Reset scan count array.
+        Arrays.fill(scanCountArray, 0);
+        expectedResults.clear();
+
+        GrowableArray tokenData = new GrowableArray();
+        tokenizer.reset(searchDocument.getFieldData(0), searchDocument.getFieldStart(0),
+                searchDocument.getFieldLength(0));
+        // Run though tokenizer to get number of tokens.
+        int numQueryTokens = 0;
+        while (tokenizer.hasNext()) {
+            tokenizer.next();
+            numQueryTokens++;
+        }
+        short numTokensLowerBound = -1;
+        short numTokensUpperBound = -1;
+        int invListElementField = 1;
+        if (isPartitioned) {
+            numTokensLowerBound = searchModifier.getNumTokensLowerBound((short) numQueryTokens);
+            numTokensUpperBound = searchModifier.getNumTokensUpperBound((short) numQueryTokens);
+            invListElementField = 2;
+        }
+        int occurrenceThreshold = searchModifier.getOccurrenceThreshold(numQueryTokens);
+        tokenizer.reset(searchDocument.getFieldData(0), searchDocument.getFieldStart(0),
+                searchDocument.getFieldLength(0));
+        while (tokenizer.hasNext()) {
+            tokenizer.next();
+            IToken token = tokenizer.getToken();
+            tokenData.reset();
+            token.serializeToken(tokenData);
+            ByteArrayInputStream inStream = new ByteArrayInputStream(tokenData.getByteArray(), 0, tokenData.getLength());
+            DataInput dataIn = new DataInputStream(inStream);
+            Comparable tokenObj = (Comparable) tokenSerde.deserialize(dataIn);
+            CheckTuple lowKey;
+            if (numTokensLowerBound < 0) {
+                // Index is not partitioned, or no length filtering is possible for this search modifier.
+                lowKey = new CheckTuple(1, 1);
+                lowKey.appendField(tokenObj);
+            } else {
+                // Index is length partitioned, and search modifier supports length filtering.
+                lowKey = new CheckTuple(2, 2);
+                lowKey.appendField(tokenObj);
+                lowKey.appendField(Short.valueOf(numTokensLowerBound));
+            }
+            CheckTuple highKey;
+            if (numTokensUpperBound < 0) {
+                // Index is not partitioned, or no length filtering is possible for this search modifier.
+                highKey = new CheckTuple(1, 1);
+                highKey.appendField(tokenObj);
+            } else {
+                // Index is length partitioned, and search modifier supports length filtering.
+                highKey = new CheckTuple(2, 2);
+                highKey.appendField(tokenObj);
+                highKey.appendField(Short.valueOf(numTokensUpperBound));
+            }
+
+            // Get view over check tuples containing inverted-list corresponding to token. 
+            SortedSet<CheckTuple> invList = OrderedIndexTestUtils.getPrefixExpectedSubset(checkTuples, lowKey, highKey);
+            Iterator<CheckTuple> invListIter = invList.iterator();
+            // Iterate over inverted list and update scan count array.
+            while (invListIter.hasNext()) {
+                CheckTuple checkTuple = invListIter.next();
+                Integer element = (Integer) checkTuple.getField(invListElementField);
+                scanCountArray[element]++;
+            }
+        }
+
+        // Run through scan count array, and see whether elements satisfy the given occurrence threshold.
+        expectedResults.clear();
+        for (int i = 0; i < scanCountArray.length; i++) {
+            if (scanCountArray[i] >= occurrenceThreshold) {
+                expectedResults.add(i);
+            }
+        }
+    }
+
+    public static void testIndexSearch(LSMInvertedIndexTestContext testCtx, TupleGenerator tupleGen, Random rnd,
+            int numDocQueries, int numRandomQueries, IInvertedIndexSearchModifier searchModifier, int[] scanCountArray)
+            throws IOException, IndexException {
+        IInvertedIndex invIndex = testCtx.invIndex;
+        IInvertedIndexAccessor accessor = (IInvertedIndexAccessor) invIndex.createAccessor(
+                NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+        IBinaryTokenizer tokenizer = testCtx.getTokenizerFactory().createTokenizer();
+        InvertedIndexSearchPredicate searchPred = new InvertedIndexSearchPredicate(tokenizer, searchModifier);
+        List<ITupleReference> documentCorpus = testCtx.getDocumentCorpus();
+        // Project away the primary-key field.
+        int[] fieldPermutation = new int[] { 0 };
+        PermutingTupleReference searchDocument = new PermutingTupleReference(fieldPermutation);
+
+        IIndexCursor resultCursor = accessor.createSearchCursor();
+        int numQueries = numDocQueries + numRandomQueries;
+        for (int i = 0; i < numQueries; i++) {
+            // If number of documents in the corpus is less than numDocQueries, then replace the remaining ones with random queries.
+            if (i >= numDocQueries || i >= documentCorpus.size()) {
+                // Generate a random query.
+                ITupleReference randomQuery = tupleGen.next();
+                searchDocument.reset(randomQuery);
+            } else {
+                // Pick a random document from the corpus to use as the search query.
+                int queryIndex = Math.abs(rnd.nextInt() % documentCorpus.size());
+                searchDocument.reset(documentCorpus.get(queryIndex));
+            }
+
+            // Set query tuple in search predicate.
+            searchPred.setQueryTuple(searchDocument);
+            searchPred.setQueryFieldIndex(0);
+
+            resultCursor.reset();
+            boolean panic = false;
+            try {
+                accessor.search(resultCursor, searchPred);
+            } catch (OccurrenceThresholdPanicException e) {
+                // ignore panic queries.
+                panic = true;
+            }
+
+            try {
+                if (!panic) {
+                    // Consume cursor and deserialize results so we can sort them. Some search cursors may not deliver the result sorted (e.g., LSM search cursor).
+                    ArrayList<Integer> actualResults = new ArrayList<Integer>();
+                    try {
+                        while (resultCursor.hasNext()) {
+                            resultCursor.next();
+                            ITupleReference resultTuple = resultCursor.getTuple();
+                            int actual = IntegerSerializerDeserializer.getInt(resultTuple.getFieldData(0),
+                                    resultTuple.getFieldStart(0));
+                            actualResults.add(Integer.valueOf(actual));
+                        }
+                    } catch (OccurrenceThresholdPanicException e) {
+                        // Ignore panic queries.
+                        continue;
+                    }
+                    Collections.sort(actualResults);
+
+                    // Get expected results.
+                    List<Integer> expectedResults = new ArrayList<Integer>();
+                    LSMInvertedIndexTestUtils.getExpectedResults(scanCountArray, testCtx.getCheckTuples(),
+                            searchDocument, tokenizer, testCtx.getFieldSerdes()[0], searchModifier, expectedResults,
+                            testCtx.getInvertedIndexType());
+
+                    Iterator<Integer> expectedIter = expectedResults.iterator();
+                    Iterator<Integer> actualIter = actualResults.iterator();
+                    while (expectedIter.hasNext() && actualIter.hasNext()) {
+                        int expected = expectedIter.next();
+                        int actual = actualIter.next();
+                        if (actual != expected) {
+                            fail("Query results do not match. Encountered: " + actual + ". Expected: " + expected + "");
+                        }
+                    }
+                    if (expectedIter.hasNext()) {
+                        fail("Query results do not match. Actual results missing.");
+                    }
+                    if (actualIter.hasNext()) {
+                        fail("Query results do not match. Actual contains too many results.");
+                    }
+                }
+            } finally {
+                resultCursor.close();
+            }
+        }
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/pom.xml b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/pom.xml
new file mode 100644
index 0000000..a39fd3a
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/pom.xml
@@ -0,0 +1,40 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <artifactId>hyracks-storage-am-lsm-rtree-test</artifactId>
+
+  <parent>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks-tests</artifactId>
+    <version>0.2.5-SNAPSHOT</version>
+  </parent>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.0.2</version>
+        <configuration>
+          <source>1.7</source>
+          <target>1.7</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>  	
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-storage-am-lsm-rtree</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-test-support</artifactId>
+  		<version>0.2.5-SNAPSHOT</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  </dependencies>
+</project>
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeBulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeBulkLoadTest.java
new file mode 100644
index 0000000..995f18c
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeBulkLoadTest.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeBulkLoadTest;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+@SuppressWarnings("rawtypes")
+public class LSMRTreeBulkLoadTest extends AbstractRTreeBulkLoadTest {
+
+    public LSMRTreeBulkLoadTest() {
+        super(1, AccessMethodTestsConfig.LSM_RTREE_TEST_RSTAR_POLICY);
+    }
+
+    private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
+            throws Exception {
+        return LSMRTreeTestContext.create(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType,
+                harness.getMergePolicy(), harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeDeleteTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeDeleteTest.java
new file mode 100644
index 0000000..d72b668
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeDeleteTest.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeDeleteTest;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+@SuppressWarnings("rawtypes")
+public class LSMRTreeDeleteTest extends AbstractRTreeDeleteTest {
+
+    private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+
+    public LSMRTreeDeleteTest() {
+        super(AccessMethodTestsConfig.LSM_RTREE_TEST_RSTAR_POLICY);
+    }
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
+            throws Exception {
+        return LSMRTreeTestContext.create(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType,
+                harness.getMergePolicy(), harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeExamplesTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeExamplesTest.java
new file mode 100644
index 0000000..cba8cee
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeExamplesTest.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.utils.LSMRTreeUtils;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeExamplesTest;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+public class LSMRTreeExamplesTest extends AbstractRTreeExamplesTest {
+    private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+
+    @Override
+    protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
+            IBinaryComparatorFactory[] btreeCmpFactories, IPrimitiveValueProviderFactory[] valueProviderFactories,
+            RTreePolicyType rtreePolicyType) throws TreeIndexException {
+        return LSMRTreeUtils.createLSMTree(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), typeTraits, rtreeCmpFactories, btreeCmpFactories,
+                valueProviderFactories, rtreePolicyType, harness.getMergePolicy(),
+                harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider(),
+                LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length));
+    }
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeInsertTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeInsertTest.java
new file mode 100644
index 0000000..96485f8
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeInsertTest.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeInsertTest;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+@SuppressWarnings("rawtypes")
+public class LSMRTreeInsertTest extends AbstractRTreeInsertTest {
+
+    private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+
+    public LSMRTreeInsertTest() {
+        super(AccessMethodTestsConfig.LSM_RTREE_TEST_RSTAR_POLICY);
+    }
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
+            throws Exception {
+        return LSMRTreeTestContext.create(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType,
+                harness.getMergePolicy(), harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeLifecycleTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeLifecycleTest.java
new file mode 100644
index 0000000..e72b3ca
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeLifecycleTest.java
@@ -0,0 +1,84 @@
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexLifecycleTest;
+import edu.uci.ics.hyracks.storage.am.common.CheckTuple;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.common.TreeIndexTestUtils;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.impls.LSMRTree;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.rtree.RTreeTestUtils;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
+
+public class LSMRTreeLifecycleTest extends AbstractIndexLifecycleTest {
+
+    @SuppressWarnings("rawtypes")
+    private final ISerializerDeserializer[] fieldSerdes = { IntegerSerializerDeserializer.INSTANCE,
+            IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+            IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE };
+    private final IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils
+            .createPrimitiveValueProviderFactories(4, IntegerPointable.FACTORY);
+    private final int numKeys = 4;
+
+    private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+    private final TreeIndexTestUtils titu = new RTreeTestUtils();
+
+    @SuppressWarnings("rawtypes")
+    private IIndexTestContext<? extends CheckTuple> testCtx;
+
+    @Override
+    protected boolean persistentStateExists() throws Exception {
+        // make sure all of the directories exist
+        for (IODeviceHandle handle : harness.getIOManager().getIODevices()) {
+            if (!new FileReference(handle, harness.getFileReference().getFile().getPath()).getFile().exists()) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    @Override
+    protected boolean isEmptyIndex() throws Exception {
+        return ((LSMRTree) index).isEmptyIndex();
+    }
+
+    @Override
+    public void setup() throws Exception {
+        harness.setUp();
+        testCtx = LSMRTreeTestContext.create(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RTREE,
+                harness.getMergePolicy(), harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+        index = testCtx.getIndex();
+    }
+
+    @Override
+    public void tearDown() throws Exception {
+        index.deactivate();
+        index.destroy();
+        harness.tearDown();
+    }
+
+    @Override
+    protected void performInsertions() throws Exception {
+        titu.insertIntTuples(testCtx, 10, harness.getRandom());
+    }
+
+    @Override
+    protected void checkInsertions() throws Exception {
+        titu.checkScan(testCtx);
+    }
+
+    @Override
+    protected void clearCheckableInsertions() throws Exception {
+        testCtx.getCheckTuples().clear();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeMergeTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeMergeTest.java
new file mode 100644
index 0000000..1d07484
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeMergeTest.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+@SuppressWarnings("rawtypes")
+public class LSMRTreeMergeTest extends LSMRTreeMergeTestDriver {
+
+    private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+
+    public LSMRTreeMergeTest() {
+        super(AccessMethodTestsConfig.LSM_RTREE_TEST_RSTAR_POLICY);
+    }
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
+            throws Exception {
+        return LSMRTreeTestContext.create(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType,
+                harness.getMergePolicy(), harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeMergeTestDriver.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeMergeTestDriver.java
new file mode 100644
index 0000000..f272942
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeMergeTestDriver.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestDriver;
+import edu.uci.ics.hyracks.storage.am.rtree.RTreeTestUtils;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+@SuppressWarnings("rawtypes")
+public abstract class LSMRTreeMergeTestDriver extends AbstractRTreeTestDriver {
+
+    private final RTreeTestUtils rTreeTestUtils;
+
+    public LSMRTreeMergeTestDriver(boolean testRstarPolicy) {
+        super(testRstarPolicy);
+        this.rTreeTestUtils = new RTreeTestUtils();
+    }
+
+    @Override
+    protected void runTest(ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, ITupleReference key,
+            RTreePolicyType rtreePolicyType) throws Exception {
+
+        AbstractRTreeTestContext ctx = createTestContext(fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType);
+        ctx.getIndex().create();
+        ctx.getIndex().activate();
+        // Start off with one tree bulk loaded.
+        // We assume all fieldSerdes are of the same type. Check the first one
+        // to determine which field types to generate.
+        if (fieldSerdes[0] instanceof IntegerSerializerDeserializer) {
+            rTreeTestUtils.bulkLoadIntTuples(ctx, numTuplesToInsert, getRandom());
+        } else if (fieldSerdes[0] instanceof DoubleSerializerDeserializer) {
+            rTreeTestUtils.bulkLoadDoubleTuples(ctx, numTuplesToInsert, getRandom());
+        }
+
+        int maxTreesToMerge = AccessMethodTestsConfig.LSM_RTREE_BULKLOAD_ROUNDS;
+        for (int i = 0; i < maxTreesToMerge; i++) {
+            for (int j = 0; j < i; j++) {
+                if (fieldSerdes[0] instanceof IntegerSerializerDeserializer) {
+                    rTreeTestUtils.bulkLoadIntTuples(ctx, numTuplesToInsert, getRandom());
+                } else if (fieldSerdes[0] instanceof DoubleSerializerDeserializer) {
+                    rTreeTestUtils.bulkLoadDoubleTuples(ctx, numTuplesToInsert, getRandom());
+                }
+            }
+
+            ILSMIndexAccessor accessor = (ILSMIndexAccessor) ctx.getIndexAccessor();
+            accessor.scheduleMerge(NoOpIOOperationCallback.INSTANCE);
+
+            rTreeTestUtils.checkScan(ctx);
+            rTreeTestUtils.checkDiskOrderScan(ctx);
+            rTreeTestUtils.checkRangeSearch(ctx, key);
+        }
+        ctx.getIndex().deactivate();
+        ctx.getIndex().destroy();
+    }
+
+    @Override
+    protected String getTestOpName() {
+        return "LSM Merge";
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeMultiBulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeMultiBulkLoadTest.java
new file mode 100644
index 0000000..cc46065
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeMultiBulkLoadTest.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeBulkLoadTest;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+@SuppressWarnings("rawtypes")
+public class LSMRTreeMultiBulkLoadTest extends AbstractRTreeBulkLoadTest {
+
+    public LSMRTreeMultiBulkLoadTest() {
+        super(AccessMethodTestsConfig.LSM_RTREE_BULKLOAD_ROUNDS, AccessMethodTestsConfig.LSM_RTREE_TEST_RSTAR_POLICY);
+    }
+
+    private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
+            throws Exception {
+        return LSMRTreeTestContext.create(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType,
+                harness.getMergePolicy(), harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesBulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesBulkLoadTest.java
new file mode 100644
index 0000000..81a952d
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesBulkLoadTest.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeWithAntiMatterTuplesTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeBulkLoadTest;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+@SuppressWarnings("rawtypes")
+public class LSMRTreeWithAntiMatterTuplesBulkLoadTest extends AbstractRTreeBulkLoadTest {
+
+    public LSMRTreeWithAntiMatterTuplesBulkLoadTest() {
+        super(1, AccessMethodTestsConfig.LSM_RTREE_TEST_RSTAR_POLICY);
+    }
+
+    private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
+            throws Exception {
+        return LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getMemBufferCache(),
+                harness.getMemFreePageManager(), harness.getIOManager(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories,
+                numKeys, rtreePolicyType, harness.getMergePolicy(), harness.getOperationTrackerFactory(),
+                harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
+
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesDeleteTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesDeleteTest.java
new file mode 100644
index 0000000..1ee92d9
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesDeleteTest.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeWithAntiMatterTuplesTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeDeleteTest;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+@SuppressWarnings("rawtypes")
+public class LSMRTreeWithAntiMatterTuplesDeleteTest extends AbstractRTreeDeleteTest {
+
+    private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+
+    public LSMRTreeWithAntiMatterTuplesDeleteTest() {
+        super(AccessMethodTestsConfig.LSM_RTREE_TEST_RSTAR_POLICY);
+    }
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
+            throws Exception {
+        return LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getMemBufferCache(),
+                harness.getMemFreePageManager(), harness.getIOManager(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories,
+                numKeys, rtreePolicyType, harness.getMergePolicy(), harness.getOperationTrackerFactory(),
+                harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
+
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesExamplesTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesExamplesTest.java
new file mode 100644
index 0000000..3a2537c
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesExamplesTest.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.utils.LSMRTreeUtils;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeExamplesTest;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+public class LSMRTreeWithAntiMatterTuplesExamplesTest extends AbstractRTreeExamplesTest {
+    private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+
+    @Override
+    protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
+            IBinaryComparatorFactory[] btreeCmpFactories, IPrimitiveValueProviderFactory[] valueProviderFactories,
+            RTreePolicyType rtreePolicyType) throws TreeIndexException {
+        return LSMRTreeUtils.createLSMTreeWithAntiMatterTuples(harness.getMemBufferCache(),
+                harness.getMemFreePageManager(), harness.getIOManager(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), typeTraits, rtreeCmpFactories,
+                btreeCmpFactories, valueProviderFactories, rtreePolicyType, harness.getMergePolicy(),
+                harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider(),
+                LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length));
+    }
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesInsertTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesInsertTest.java
new file mode 100644
index 0000000..61d5ce7
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesInsertTest.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeWithAntiMatterTuplesTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeInsertTest;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+@SuppressWarnings("rawtypes")
+public class LSMRTreeWithAntiMatterTuplesInsertTest extends AbstractRTreeInsertTest {
+
+    private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+
+    public LSMRTreeWithAntiMatterTuplesInsertTest() {
+        super(AccessMethodTestsConfig.LSM_RTREE_TEST_RSTAR_POLICY);
+    }
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
+            throws Exception {
+        return LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getMemBufferCache(),
+                harness.getMemFreePageManager(), harness.getIOManager(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories,
+                numKeys, rtreePolicyType, harness.getMergePolicy(), harness.getOperationTrackerFactory(),
+                harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
+
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesLifecycleTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesLifecycleTest.java
new file mode 100644
index 0000000..aee8670
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesLifecycleTest.java
@@ -0,0 +1,84 @@
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexLifecycleTest;
+import edu.uci.ics.hyracks.storage.am.common.CheckTuple;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.common.TreeIndexTestUtils;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.impls.LSMRTreeWithAntiMatterTuples;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeWithAntiMatterTuplesTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.RTreeTestUtils;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
+
+public class LSMRTreeWithAntiMatterTuplesLifecycleTest extends AbstractIndexLifecycleTest {
+
+    @SuppressWarnings("rawtypes")
+    private final ISerializerDeserializer[] fieldSerdes = { IntegerSerializerDeserializer.INSTANCE,
+            IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+            IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE };
+    private final IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils
+            .createPrimitiveValueProviderFactories(4, IntegerPointable.FACTORY);
+    private final int numKeys = 4;
+
+    private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+    private final TreeIndexTestUtils titu = new RTreeTestUtils();
+
+    @SuppressWarnings("rawtypes")
+    private IIndexTestContext<? extends CheckTuple> testCtx;
+
+    @Override
+    protected boolean persistentStateExists() throws Exception {
+        // make sure all of the directories exist
+        for (IODeviceHandle handle : harness.getIOManager().getIODevices()) {
+            if (!new FileReference(handle, harness.getFileReference().getFile().getPath()).getFile().exists()) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    @Override
+    protected boolean isEmptyIndex() throws Exception {
+        return ((LSMRTreeWithAntiMatterTuples) index).isEmptyIndex();
+    }
+
+    @Override
+    public void setup() throws Exception {
+        harness.setUp();
+        testCtx = LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getMemBufferCache(),
+                harness.getMemFreePageManager(), harness.getIOManager(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories,
+                numKeys, RTreePolicyType.RTREE, harness.getMergePolicy(), harness.getOperationTrackerFactory(),
+                harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
+        index = testCtx.getIndex();
+    }
+
+    @Override
+    public void tearDown() throws Exception {
+        index.deactivate();
+        index.destroy();
+        harness.tearDown();
+    }
+
+    @Override
+    protected void performInsertions() throws Exception {
+        titu.insertIntTuples(testCtx, 10, harness.getRandom());
+    }
+
+    @Override
+    protected void checkInsertions() throws Exception {
+        titu.checkScan(testCtx);
+    }
+
+    @Override
+    protected void clearCheckableInsertions() throws Exception {
+        testCtx.getCheckTuples().clear();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesMergeTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesMergeTest.java
new file mode 100644
index 0000000..d5fecbf
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesMergeTest.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeWithAntiMatterTuplesTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+@SuppressWarnings("rawtypes")
+public class LSMRTreeWithAntiMatterTuplesMergeTest extends LSMRTreeMergeTestDriver {
+
+    private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+
+    public LSMRTreeWithAntiMatterTuplesMergeTest() {
+        super(AccessMethodTestsConfig.LSM_RTREE_TEST_RSTAR_POLICY);
+    }
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
+            throws Exception {
+        return LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getMemBufferCache(),
+                harness.getMemFreePageManager(), harness.getIOManager(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories,
+                numKeys, rtreePolicyType, harness.getMergePolicy(), harness.getOperationTrackerFactory(),
+                harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesMultiBulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesMultiBulkLoadTest.java
new file mode 100644
index 0000000..de5f065
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesMultiBulkLoadTest.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree;
+
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeWithAntiMatterTuplesTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeBulkLoadTest;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+@SuppressWarnings("rawtypes")
+public class LSMRTreeWithAntiMatterTuplesMultiBulkLoadTest extends AbstractRTreeBulkLoadTest {
+
+    public LSMRTreeWithAntiMatterTuplesMultiBulkLoadTest() {
+        super(AccessMethodTestsConfig.LSM_RTREE_BULKLOAD_ROUNDS, AccessMethodTestsConfig.LSM_RTREE_TEST_RSTAR_POLICY);
+    }
+
+    private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+
+    @Before
+    public void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @After
+    public void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
+            throws Exception {
+        return LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getMemBufferCache(),
+                harness.getMemFreePageManager(), harness.getIOManager(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories,
+                numKeys, rtreePolicyType, harness.getMergePolicy(), harness.getOperationTrackerFactory(),
+                harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
+
+    }
+
+    @Override
+    protected Random getRandom() {
+        return harness.getRandom();
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/AbstractLSMRTreeTestWorker.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/AbstractLSMRTreeTestWorker.java
new file mode 100644
index 0000000..d530b82
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/AbstractLSMRTreeTestWorker.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.multithread;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexTestWorker;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+
+public abstract class AbstractLSMRTreeTestWorker extends AbstractIndexTestWorker {
+
+    protected final ITreeIndex lsmRTree;
+    protected final int numFields;
+    protected final ArrayTupleBuilder rearrangedTb;
+    protected final ArrayTupleReference rearrangedTuple = new ArrayTupleReference();
+
+    public AbstractLSMRTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index,
+            int numBatches) {
+        super(dataGen, opSelector, index, numBatches);
+        lsmRTree = (ITreeIndex) index;
+        numFields = lsmRTree.getFieldCount();
+        rearrangedTb = new ArrayTupleBuilder(numFields);
+    }
+
+    protected void rearrangeTuple(ITupleReference tuple, MultiComparator cmp) throws HyracksDataException {
+        // Create a tuple with rearranged key values to make sure lower points
+        // have larger coordinates than high points.
+        rearrangedTb.reset();
+        int maxFieldPos = cmp.getKeyFieldCount() / 2;
+        for (int i = 0; i < maxFieldPos; i++) {
+            int j = maxFieldPos + i;
+            int c = cmp.getComparators()[i].compare(tuple.getFieldData(i), tuple.getFieldStart(i),
+                    tuple.getFieldLength(i), tuple.getFieldData(j), tuple.getFieldStart(j), tuple.getFieldLength(j));
+            if (c > 0) {
+                rearrangedTb.addField(tuple.getFieldData(j), tuple.getFieldStart(j), tuple.getFieldLength(j));
+            } else {
+                rearrangedTb.addField(tuple.getFieldData(i), tuple.getFieldStart(i), tuple.getFieldLength(i));
+            }
+        }
+        for (int i = 0; i < maxFieldPos; i++) {
+            int j = maxFieldPos + i;
+            int c = cmp.getComparators()[i].compare(tuple.getFieldData(i), tuple.getFieldStart(i),
+                    tuple.getFieldLength(i), tuple.getFieldData(j), tuple.getFieldStart(j), tuple.getFieldLength(j));
+            if (c > 0) {
+                rearrangedTb.addField(tuple.getFieldData(i), tuple.getFieldStart(i), tuple.getFieldLength(i));
+            } else {
+                rearrangedTb.addField(tuple.getFieldData(j), tuple.getFieldStart(j), tuple.getFieldLength(j));
+            }
+        }
+        for (int i = cmp.getKeyFieldCount(); i < numFields; i++) {
+            rearrangedTb.addField(tuple.getFieldData(i), tuple.getFieldStart(i), tuple.getFieldLength(i));
+        }
+        rearrangedTuple.reset(rearrangedTb.getFieldEndOffsets(), rearrangedTb.getByteArray());
+    }
+
+    protected void consumeCursorTuples(ITreeIndexCursor cursor) throws HyracksDataException, IndexException {
+        try {
+            while (cursor.hasNext()) {
+                cursor.next();
+            }
+        } finally {
+            cursor.close();
+        }
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeMultiThreadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeMultiThreadTest.java
new file mode 100644
index 0000000..37be58d
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeMultiThreadTest.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.multithread;
+
+import java.util.ArrayList;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestWorkerFactory;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.TestWorkloadConf;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.ProbabilityHelper;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.utils.LSMRTreeUtils;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeMultiThreadTest;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+public class LSMRTreeMultiThreadTest extends AbstractRTreeMultiThreadTest {
+
+    private LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+
+    private LSMRTreeTestWorkerFactory workerFactory = new LSMRTreeTestWorkerFactory();
+
+    public LSMRTreeMultiThreadTest() {
+        super(false);
+    }
+
+    @Override
+    protected void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @Override
+    protected void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
+            IBinaryComparatorFactory[] btreeCmpFactories, IPrimitiveValueProviderFactory[] valueProviderFactories,
+            RTreePolicyType rtreePolicyType) throws TreeIndexException {
+        return LSMRTreeUtils.createLSMTree(harness.getMemBufferCache(), harness.getMemFreePageManager(),
+                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
+                harness.getDiskFileMapProvider(), typeTraits, rtreeCmpFactories, btreeCmpFactories,
+                valueProviderFactories, rtreePolicyType, harness.getMergePolicy(),
+                harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider(),
+                LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length));
+    }
+
+    @Override
+    protected IIndexTestWorkerFactory getWorkerFactory() {
+        return workerFactory;
+    }
+
+    @Override
+    protected ArrayList<TestWorkloadConf> getTestWorkloadConf() {
+        ArrayList<TestWorkloadConf> workloadConfs = new ArrayList<TestWorkloadConf>();
+
+        // Insert only workload.
+        TestOperation[] insertOnlyOps = new TestOperation[] { TestOperation.INSERT };
+        workloadConfs.add(new TestWorkloadConf(insertOnlyOps, ProbabilityHelper
+                .getUniformProbDist(insertOnlyOps.length)));
+
+        // Insert and merge workload.
+        TestOperation[] insertMergeOps = new TestOperation[] { TestOperation.INSERT, TestOperation.MERGE };
+        workloadConfs.add(new TestWorkloadConf(insertMergeOps, ProbabilityHelper
+                .getUniformProbDist(insertMergeOps.length)));
+
+        // Inserts mixed with scans.
+        TestOperation[] insertSearchOnlyOps = new TestOperation[] { TestOperation.INSERT, TestOperation.SCAN };
+        workloadConfs.add(new TestWorkloadConf(insertSearchOnlyOps, ProbabilityHelper
+                .getUniformProbDist(insertSearchOnlyOps.length)));
+
+        // Inserts and deletes.
+        TestOperation[] insertDeleteOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE };
+        workloadConfs.add(new TestWorkloadConf(insertDeleteOps, ProbabilityHelper
+                .getUniformProbDist(insertDeleteOps.length)));
+
+        // Inserts, deletes and merges.
+        TestOperation[] insertDeleteMergeOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE,
+                TestOperation.MERGE };
+        workloadConfs.add(new TestWorkloadConf(insertDeleteMergeOps, ProbabilityHelper
+                .getUniformProbDist(insertDeleteMergeOps.length)));
+
+        // All operations except merge.
+        TestOperation[] allNoMergeOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE,
+                TestOperation.SCAN };
+        workloadConfs.add(new TestWorkloadConf(allNoMergeOps, ProbabilityHelper
+                .getUniformProbDist(allNoMergeOps.length)));
+
+        // All operations.
+        TestOperation[] allOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE, TestOperation.SCAN,
+                TestOperation.MERGE };
+        workloadConfs.add(new TestWorkloadConf(allOps, ProbabilityHelper.getUniformProbDist(allOps.length)));
+
+        return workloadConfs;
+    }
+
+    @Override
+    protected String getIndexTypeName() {
+        return "LSMRTree";
+    }
+
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeTestWorker.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeTestWorker.java
new file mode 100644
index 0000000..154756e
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeTestWorker.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.multithread;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexTestWorker;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.impls.LSMRTree;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.impls.LSMRTree.LSMRTreeAccessor;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.SearchPredicate;
+
+public class LSMRTreeTestWorker extends AbstractIndexTestWorker {
+
+    private final LSMRTree lsmRTree;
+    private final int numFields;
+    private final ArrayTupleBuilder rearrangedTb;
+    private final ArrayTupleReference rearrangedTuple = new ArrayTupleReference();
+
+    public LSMRTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches) {
+        super(dataGen, opSelector, index, numBatches);
+        lsmRTree = (LSMRTree) index;
+        numFields = lsmRTree.getFieldCount();
+        rearrangedTb = new ArrayTupleBuilder(numFields);
+    }
+
+    @Override
+    public void performOp(ITupleReference tuple, TestOperation op) throws HyracksDataException, IndexException {
+        LSMRTreeAccessor accessor = (LSMRTreeAccessor) indexAccessor;
+        ITreeIndexCursor searchCursor = accessor.createSearchCursor();
+        MultiComparator cmp = accessor.getMultiComparator();
+        SearchPredicate rangePred = new SearchPredicate(tuple, cmp);
+
+        switch (op) {
+            case INSERT:
+                rearrangeTuple(tuple, cmp);
+                accessor.insert(rearrangedTuple);
+                break;
+
+            case DELETE:
+                rearrangeTuple(tuple, cmp);
+                accessor.delete(rearrangedTuple);
+                break;
+
+            case SCAN:
+                searchCursor.reset();
+                rangePred.setSearchKey(null);
+                accessor.search(searchCursor, rangePred);
+                consumeCursorTuples(searchCursor);
+                break;
+
+            case MERGE:
+                accessor.scheduleMerge(NoOpIOOperationCallback.INSTANCE);
+                break;
+
+            default:
+                throw new HyracksDataException("Op " + op.toString() + " not supported.");
+        }
+    }
+
+    private void rearrangeTuple(ITupleReference tuple, MultiComparator cmp) throws HyracksDataException {
+        // Create a tuple with rearranged key values to make sure lower points
+        // have larger coordinates than high points.
+        rearrangedTb.reset();
+        int maxFieldPos = cmp.getKeyFieldCount() / 2;
+        for (int i = 0; i < maxFieldPos; i++) {
+            int j = maxFieldPos + i;
+            int c = cmp.getComparators()[i].compare(tuple.getFieldData(i), tuple.getFieldStart(i),
+                    tuple.getFieldLength(i), tuple.getFieldData(j), tuple.getFieldStart(j), tuple.getFieldLength(j));
+            if (c > 0) {
+                rearrangedTb.addField(tuple.getFieldData(j), tuple.getFieldStart(j), tuple.getFieldLength(j));
+            } else {
+                rearrangedTb.addField(tuple.getFieldData(i), tuple.getFieldStart(i), tuple.getFieldLength(i));
+            }
+        }
+        for (int i = 0; i < maxFieldPos; i++) {
+            int j = maxFieldPos + i;
+            int c = cmp.getComparators()[i].compare(tuple.getFieldData(i), tuple.getFieldStart(i),
+                    tuple.getFieldLength(i), tuple.getFieldData(j), tuple.getFieldStart(j), tuple.getFieldLength(j));
+            if (c > 0) {
+                rearrangedTb.addField(tuple.getFieldData(i), tuple.getFieldStart(i), tuple.getFieldLength(i));
+            } else {
+                rearrangedTb.addField(tuple.getFieldData(j), tuple.getFieldStart(j), tuple.getFieldLength(j));
+            }
+        }
+        for (int i = cmp.getKeyFieldCount(); i < numFields; i++) {
+            rearrangedTb.addField(tuple.getFieldData(i), tuple.getFieldStart(i), tuple.getFieldLength(i));
+        }
+        rearrangedTuple.reset(rearrangedTb.getFieldEndOffsets(), rearrangedTb.getByteArray());
+    }
+
+    private void consumeCursorTuples(ITreeIndexCursor cursor) throws HyracksDataException, IndexException {
+        try {
+            while (cursor.hasNext()) {
+                cursor.next();
+            }
+        } finally {
+            cursor.close();
+        }
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeTestWorkerFactory.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeTestWorkerFactory.java
new file mode 100644
index 0000000..13e3ab0
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeTestWorkerFactory.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.multithread;
+
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexTestWorker;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestWorkerFactory;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+
+public class LSMRTreeTestWorkerFactory implements IIndexTestWorkerFactory {
+    @Override
+    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector,
+            IIndex index, int numBatches) {
+        return new LSMRTreeTestWorker(dataGen, opSelector, index, numBatches);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeWithAntiMatterTuplesMultiThreadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeWithAntiMatterTuplesMultiThreadTest.java
new file mode 100644
index 0000000..af73676
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeWithAntiMatterTuplesMultiThreadTest.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.multithread;
+
+import java.util.ArrayList;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestWorkerFactory;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.TestWorkloadConf;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.ProbabilityHelper;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.util.LSMRTreeTestHarness;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.utils.LSMRTreeUtils;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeMultiThreadTest;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+
+public class LSMRTreeWithAntiMatterTuplesMultiThreadTest extends AbstractRTreeMultiThreadTest {
+
+    private LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
+
+    private LSMRTreeWithAntiMatterTuplesTestWorkerFactory workerFactory = new LSMRTreeWithAntiMatterTuplesTestWorkerFactory();
+
+    public LSMRTreeWithAntiMatterTuplesMultiThreadTest() {
+        super(false);
+    }
+
+    @Override
+    protected void setUp() throws HyracksException {
+        harness.setUp();
+    }
+
+    @Override
+    protected void tearDown() throws HyracksDataException {
+        harness.tearDown();
+    }
+
+    @Override
+    protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
+            IBinaryComparatorFactory[] btreeCmpFactories, IPrimitiveValueProviderFactory[] valueProviderFactories,
+            RTreePolicyType rtreePolicyType) throws TreeIndexException {
+        return LSMRTreeUtils.createLSMTreeWithAntiMatterTuples(harness.getMemBufferCache(),
+                harness.getMemFreePageManager(), harness.getIOManager(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), typeTraits, rtreeCmpFactories,
+                btreeCmpFactories, valueProviderFactories, rtreePolicyType, harness.getMergePolicy(),
+                harness.getOperationTrackerFactory(), harness.getIOScheduler(),
+                harness.getIOOperationCallbackProvider(),
+                LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length));
+
+    }
+
+    @Override
+    protected IIndexTestWorkerFactory getWorkerFactory() {
+        return workerFactory;
+    }
+
+    @Override
+    protected ArrayList<TestWorkloadConf> getTestWorkloadConf() {
+        ArrayList<TestWorkloadConf> workloadConfs = new ArrayList<TestWorkloadConf>();
+
+        // Insert only workload.
+        TestOperation[] insertOnlyOps = new TestOperation[] { TestOperation.INSERT };
+        workloadConfs.add(new TestWorkloadConf(insertOnlyOps, ProbabilityHelper
+                .getUniformProbDist(insertOnlyOps.length)));
+
+        // Insert and merge workload.
+        TestOperation[] insertMergeOps = new TestOperation[] { TestOperation.INSERT, TestOperation.MERGE };
+        workloadConfs.add(new TestWorkloadConf(insertMergeOps, ProbabilityHelper
+                .getUniformProbDist(insertMergeOps.length)));
+
+        // Inserts mixed with scans.
+        TestOperation[] insertSearchOnlyOps = new TestOperation[] { TestOperation.INSERT, TestOperation.SCAN };
+        workloadConfs.add(new TestWorkloadConf(insertSearchOnlyOps, ProbabilityHelper
+                .getUniformProbDist(insertSearchOnlyOps.length)));
+
+        // Inserts and deletes.
+        TestOperation[] insertDeleteOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE };
+        workloadConfs.add(new TestWorkloadConf(insertDeleteOps, ProbabilityHelper
+                .getUniformProbDist(insertDeleteOps.length)));
+
+        // Inserts, deletes and merges.
+        TestOperation[] insertDeleteMergeOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE,
+                TestOperation.MERGE };
+        workloadConfs.add(new TestWorkloadConf(insertDeleteMergeOps, ProbabilityHelper
+                .getUniformProbDist(insertDeleteMergeOps.length)));
+
+        // All operations except merge.
+        TestOperation[] allNoMergeOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE,
+                TestOperation.SCAN };
+        workloadConfs.add(new TestWorkloadConf(allNoMergeOps, ProbabilityHelper
+                .getUniformProbDist(allNoMergeOps.length)));
+
+        // All operations.
+        TestOperation[] allOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE, TestOperation.SCAN,
+                TestOperation.MERGE };
+        workloadConfs.add(new TestWorkloadConf(allOps, ProbabilityHelper.getUniformProbDist(allOps.length)));
+
+        return workloadConfs;
+    }
+
+    @Override
+    protected String getIndexTypeName() {
+        return "LSMRTree";
+    }
+
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeWithAntiMatterTuplesTestWorker.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeWithAntiMatterTuplesTestWorker.java
new file mode 100644
index 0000000..661138d
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeWithAntiMatterTuplesTestWorker.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.multithread;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.impls.LSMRTreeWithAntiMatterTuples.LSMRTreeWithAntiMatterTuplesAccessor;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.SearchPredicate;
+
+public class LSMRTreeWithAntiMatterTuplesTestWorker extends AbstractLSMRTreeTestWorker {
+
+    public LSMRTreeWithAntiMatterTuplesTestWorker(DataGenThread dataGen, TestOperationSelector opSelector,
+            IIndex index, int numBatches) {
+        super(dataGen, opSelector, index, numBatches);
+    }
+
+    @Override
+    public void performOp(ITupleReference tuple, TestOperation op) throws HyracksDataException, IndexException {
+        LSMRTreeWithAntiMatterTuplesAccessor accessor = (LSMRTreeWithAntiMatterTuplesAccessor) indexAccessor;
+        ITreeIndexCursor searchCursor = accessor.createSearchCursor();
+        MultiComparator cmp = accessor.getMultiComparator();
+        SearchPredicate rangePred = new SearchPredicate(tuple, cmp);
+
+        switch (op) {
+            case INSERT:
+                rearrangeTuple(tuple, cmp);
+                accessor.insert(rearrangedTuple);
+                break;
+
+            case DELETE:
+                rearrangeTuple(tuple, cmp);
+                accessor.delete(rearrangedTuple);
+                break;
+
+            case SCAN:
+                searchCursor.reset();
+                rangePred.setSearchKey(null);
+                accessor.search(searchCursor, rangePred);
+                consumeCursorTuples(searchCursor);
+                break;
+
+            case MERGE:
+                accessor.scheduleMerge(NoOpIOOperationCallback.INSTANCE);
+                break;
+
+            default:
+                throw new HyracksDataException("Op " + op.toString() + " not supported.");
+        }
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeWithAntiMatterTuplesTestWorkerFactory.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeWithAntiMatterTuplesTestWorkerFactory.java
new file mode 100644
index 0000000..4e78d82
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeWithAntiMatterTuplesTestWorkerFactory.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.multithread;
+
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexTestWorker;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestWorkerFactory;
+import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
+
+public class LSMRTreeWithAntiMatterTuplesTestWorkerFactory implements IIndexTestWorkerFactory {
+    @Override
+    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector,
+            IIndex index, int numBatches) {
+        return new LSMRTreeWithAntiMatterTuplesTestWorker(dataGen, opSelector, index, numBatches);
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/util/LSMRTreeTestContext.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/util/LSMRTreeTestContext.java
new file mode 100644
index 0000000..27fb9c8
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/util/LSMRTreeTestContext.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.util;
+
+import java.util.Collection;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.control.nc.io.IOManager;
+import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.impls.LSMRTree;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.utils.LSMRTreeUtils;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.RTreeCheckTuple;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+@SuppressWarnings("rawtypes")
+public final class LSMRTreeTestContext extends AbstractRTreeTestContext {
+
+    public LSMRTreeTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) {
+        super(fieldSerdes, treeIndex);
+    }
+
+    @Override
+    public int getKeyFieldCount() {
+        LSMRTree lsmTree = (LSMRTree) index;
+        return lsmTree.getComparatorFactories().length;
+    }
+
+    /**
+     * Override to provide delete semantics for the check tuples.
+     */
+    @Override
+    public void deleteCheckTuple(RTreeCheckTuple checkTuple, Collection<RTreeCheckTuple> checkTuples) {
+        while (checkTuples.remove(checkTuple)) {
+        }
+    }
+
+    @Override
+    public IBinaryComparatorFactory[] getComparatorFactories() {
+        LSMRTree lsmTree = (LSMRTree) index;
+        return lsmTree.getComparatorFactories();
+    }
+
+    public static LSMRTreeTestContext create(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IOManager ioManager, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeyFields, RTreePolicyType rtreePolicyType,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider)
+            throws Exception {
+        ITypeTraits[] typeTraits = SerdeUtils.serdesToTypeTraits(fieldSerdes);
+        IBinaryComparatorFactory[] rtreeCmpFactories = SerdeUtils
+                .serdesToComparatorFactories(fieldSerdes, numKeyFields);
+        IBinaryComparatorFactory[] btreeCmpFactories = SerdeUtils.serdesToComparatorFactories(fieldSerdes,
+                fieldSerdes.length);
+        LSMRTree lsmTree = LSMRTreeUtils.createLSMTree(memBufferCache, memFreePageManager, ioManager, file,
+                diskBufferCache, diskFileMapProvider, typeTraits, rtreeCmpFactories, btreeCmpFactories,
+                valueProviderFactories, rtreePolicyType, mergePolicy, opTrackerFactory, ioScheduler,
+                ioOpCallbackProvider, LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length));
+        LSMRTreeTestContext testCtx = new LSMRTreeTestContext(fieldSerdes, lsmTree);
+        return testCtx;
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/util/LSMRTreeTestHarness.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/util/LSMRTreeTestHarness.java
new file mode 100644
index 0000000..6fb6f9c
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/util/LSMRTreeTestHarness.java
@@ -0,0 +1,214 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.util;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Random;
+import java.util.logging.Logger;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IODeviceHandle;
+import edu.uci.ics.hyracks.control.nc.io.IOManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.DualIndexInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.freepage.DualIndexInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.NoOpIOOperationCallback;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.SynchronousScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ThreadCountingOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.HeapBufferAllocator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
+import edu.uci.ics.hyracks.test.support.TestUtils;
+
+public class LSMRTreeTestHarness {
+    protected static final Logger LOGGER = Logger.getLogger(LSMRTreeTestHarness.class.getName());
+
+    private static final long RANDOM_SEED = 50;
+
+    protected final int diskPageSize;
+    protected final int diskNumPages;
+    protected final int diskMaxOpenFiles;
+    protected final int memPageSize;
+    protected final int memNumPages;
+    protected final int hyracksFrameSize;
+
+    protected IOManager ioManager;
+    protected IBufferCache diskBufferCache;
+    protected IFileMapProvider diskFileMapProvider;
+    protected IInMemoryBufferCache memBufferCache;
+    protected IInMemoryFreePageManager memFreePageManager;
+    protected IHyracksTaskContext ctx;
+    protected ILSMIOOperationScheduler ioScheduler;
+    protected ILSMIOOperationCallbackProvider ioOpCallbackProvider;
+    protected ILSMMergePolicy mergePolicy;
+    protected ILSMOperationTrackerFactory opTrackerFactory;
+
+    protected final Random rnd = new Random();
+    protected final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
+    protected final static String sep = System.getProperty("file.separator");
+    protected String onDiskDir;
+    protected FileReference file;
+
+    public LSMRTreeTestHarness() {
+        this.diskPageSize = AccessMethodTestsConfig.LSM_RTREE_DISK_PAGE_SIZE;
+        this.diskNumPages = AccessMethodTestsConfig.LSM_RTREE_DISK_NUM_PAGES;
+        this.diskMaxOpenFiles = AccessMethodTestsConfig.LSM_RTREE_DISK_MAX_OPEN_FILES;
+        this.memPageSize = AccessMethodTestsConfig.LSM_RTREE_MEM_PAGE_SIZE;
+        this.memNumPages = AccessMethodTestsConfig.LSM_RTREE_MEM_NUM_PAGES;
+        this.hyracksFrameSize = AccessMethodTestsConfig.LSM_RTREE_HYRACKS_FRAME_SIZE;
+        this.ioScheduler = SynchronousScheduler.INSTANCE;
+        this.mergePolicy = NoMergePolicy.INSTANCE;
+        this.opTrackerFactory = ThreadCountingOperationTrackerFactory.INSTANCE;
+        this.ioOpCallbackProvider = NoOpIOOperationCallback.INSTANCE;
+    }
+
+    public LSMRTreeTestHarness(int diskPageSize, int diskNumPages, int diskMaxOpenFiles, int memPageSize,
+            int memNumPages, int hyracksFrameSize) {
+        this.diskPageSize = diskPageSize;
+        this.diskNumPages = diskNumPages;
+        this.diskMaxOpenFiles = diskMaxOpenFiles;
+        this.memPageSize = memPageSize;
+        this.memNumPages = memNumPages;
+        this.hyracksFrameSize = hyracksFrameSize;
+        this.ioScheduler = SynchronousScheduler.INSTANCE;
+        this.mergePolicy = NoMergePolicy.INSTANCE;
+        this.opTrackerFactory = ThreadCountingOperationTrackerFactory.INSTANCE;
+    }
+
+    public void setUp() throws HyracksException {
+        onDiskDir = "lsm_rtree_" + simpleDateFormat.format(new Date()) + sep;
+        file = new FileReference(new File(onDiskDir));
+        ctx = TestUtils.create(getHyracksFrameSize());
+        TestStorageManagerComponentHolder.init(diskPageSize, diskNumPages, diskMaxOpenFiles);
+        diskBufferCache = TestStorageManagerComponentHolder.getBufferCache(ctx);
+        diskFileMapProvider = TestStorageManagerComponentHolder.getFileMapProvider(ctx);
+        memBufferCache = new DualIndexInMemoryBufferCache(new HeapBufferAllocator(), memPageSize, memNumPages);
+        memFreePageManager = new DualIndexInMemoryFreePageManager(memNumPages, new LIFOMetaDataFrameFactory());
+        ioManager = TestStorageManagerComponentHolder.getIOManager();
+        rnd.setSeed(RANDOM_SEED);
+    }
+
+    public void tearDown() throws HyracksDataException {
+        diskBufferCache.close();
+        for (IODeviceHandle dev : ioManager.getIODevices()) {
+            File dir = new File(dev.getPath(), onDiskDir);
+            FilenameFilter filter = new FilenameFilter() {
+                public boolean accept(File dir, String name) {
+                    return !name.startsWith(".");
+                }
+            };
+            String[] files = dir.list(filter);
+            if (files != null) {
+                for (String fileName : files) {
+                    File file = new File(dir.getPath() + File.separator + fileName);
+                    file.delete();
+                }
+            }
+            dir.delete();
+        }
+    }
+
+    public int getDiskPageSize() {
+        return diskPageSize;
+    }
+
+    public int getDiskNumPages() {
+        return diskNumPages;
+    }
+
+    public int getDiskMaxOpenFiles() {
+        return diskMaxOpenFiles;
+    }
+
+    public int getMemPageSize() {
+        return memPageSize;
+    }
+
+    public int getMemNumPages() {
+        return memNumPages;
+    }
+
+    public int getHyracksFrameSize() {
+        return hyracksFrameSize;
+    }
+
+    public IOManager getIOManager() {
+        return ioManager;
+    }
+
+    public IBufferCache getDiskBufferCache() {
+        return diskBufferCache;
+    }
+
+    public IFileMapProvider getDiskFileMapProvider() {
+        return diskFileMapProvider;
+    }
+
+    public IInMemoryBufferCache getMemBufferCache() {
+        return memBufferCache;
+    }
+
+    public IInMemoryFreePageManager getMemFreePageManager() {
+        return memFreePageManager;
+    }
+
+    public IHyracksTaskContext getHyracksTastContext() {
+        return ctx;
+    }
+
+    public String getOnDiskDir() {
+        return onDiskDir;
+    }
+
+    public FileReference getFileReference() {
+        return file;
+    }
+
+    public Random getRandom() {
+        return rnd;
+    }
+
+    public ILSMIOOperationScheduler getIOScheduler() {
+        return ioScheduler;
+    }
+
+    public ILSMOperationTrackerFactory getOperationTrackerFactory() {
+        return opTrackerFactory;
+    }
+
+    public ILSMMergePolicy getMergePolicy() {
+        return mergePolicy;
+    }
+
+    public ILSMIOOperationCallbackProvider getIOOperationCallbackProvider() {
+        return ioOpCallbackProvider;
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/util/LSMRTreeWithAntiMatterTuplesTestContext.java b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/util/LSMRTreeWithAntiMatterTuplesTestContext.java
new file mode 100644
index 0000000..5860236
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/util/LSMRTreeWithAntiMatterTuplesTestContext.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.lsm.rtree.util;
+
+import java.util.Collection;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.control.nc.io.IOManager;
+import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
+import edu.uci.ics.hyracks.storage.am.common.api.IInMemoryFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IInMemoryBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.impls.LSMRTreeWithAntiMatterTuples;
+import edu.uci.ics.hyracks.storage.am.lsm.rtree.utils.LSMRTreeUtils;
+import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.RTreeCheckTuple;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+@SuppressWarnings("rawtypes")
+public final class LSMRTreeWithAntiMatterTuplesTestContext extends AbstractRTreeTestContext {
+
+    public LSMRTreeWithAntiMatterTuplesTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) {
+        super(fieldSerdes, treeIndex);
+    }
+
+    @Override
+    public int getKeyFieldCount() {
+        LSMRTreeWithAntiMatterTuples lsmTree = (LSMRTreeWithAntiMatterTuples) index;
+        return lsmTree.getComparatorFactories().length;
+    }
+
+    /**
+     * Override to provide delete semantics for the check tuples.
+     */
+    @Override
+    public void deleteCheckTuple(RTreeCheckTuple checkTuple, Collection<RTreeCheckTuple> checkTuples) {
+        while (checkTuples.remove(checkTuple)) {
+        }
+    }
+
+    @Override
+    public IBinaryComparatorFactory[] getComparatorFactories() {
+        LSMRTreeWithAntiMatterTuples lsmTree = (LSMRTreeWithAntiMatterTuples) index;
+        return lsmTree.getComparatorFactories();
+    }
+
+    public static LSMRTreeWithAntiMatterTuplesTestContext create(IInMemoryBufferCache memBufferCache,
+            IInMemoryFreePageManager memFreePageManager, IOManager ioManager, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeyFields, RTreePolicyType rtreePolicyType,
+            ILSMMergePolicy mergePolicy, ILSMOperationTrackerFactory opTrackerFactory,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider)
+            throws Exception {
+        ITypeTraits[] typeTraits = SerdeUtils.serdesToTypeTraits(fieldSerdes);
+        IBinaryComparatorFactory[] rtreeCmpFactories = SerdeUtils
+                .serdesToComparatorFactories(fieldSerdes, numKeyFields);
+        IBinaryComparatorFactory[] btreeCmpFactories = SerdeUtils.serdesToComparatorFactories(fieldSerdes,
+                fieldSerdes.length);
+        LSMRTreeWithAntiMatterTuples lsmTree = LSMRTreeUtils.createLSMTreeWithAntiMatterTuples(memBufferCache,
+                memFreePageManager, ioManager, file, diskBufferCache, diskFileMapProvider, typeTraits,
+                rtreeCmpFactories, btreeCmpFactories, valueProviderFactories, rtreePolicyType, mergePolicy,
+                opTrackerFactory, ioScheduler, ioOpCallbackProvider,
+                LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length));
+        LSMRTreeWithAntiMatterTuplesTestContext testCtx = new LSMRTreeWithAntiMatterTuplesTestContext(fieldSerdes,
+                lsmTree);
+        return testCtx;
+    }
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/pom.xml b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/pom.xml
index 5031dba..b9b0cc3 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/pom.xml
@@ -1,14 +1,12 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-am-rtree-test</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-am-rtree-test</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-tests</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -36,14 +34,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-rtree</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>test</scope>
   	</dependency>
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeBulkLoadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeBulkLoadTest.java
index 58bca10..4eeec1a 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeBulkLoadTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeBulkLoadTest.java
@@ -23,8 +23,8 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
-import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeBulkLoadTest;
-import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 import edu.uci.ics.hyracks.storage.am.rtree.utils.RTreeTestContext;
 import edu.uci.ics.hyracks.storage.am.rtree.utils.RTreeTestHarness;
 
@@ -32,7 +32,7 @@
 public class RTreeBulkLoadTest extends AbstractRTreeBulkLoadTest {
 
     public RTreeBulkLoadTest() {
-        super(1);
+        super(1, AccessMethodTestsConfig.RTREE_TEST_RSTAR_POLICY);
     }
 
     private final RTreeTestHarness harness = new RTreeTestHarness();
@@ -49,9 +49,10 @@
 
     @Override
     protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys) throws Exception {
-        return RTreeTestContext.create(harness.getBufferCache(), harness.getTreeFileId(), fieldSerdes,
-                valueProviderFactories, numKeys);
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
+            throws Exception {
+        return RTreeTestContext.create(harness.getBufferCache(), harness.getFileMapProvider(),
+                harness.getFileReference(), fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType);
     }
 
     @Override
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeDeleteTest.java b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeDeleteTest.java
index 42e933e..f4e45a8 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeDeleteTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeDeleteTest.java
@@ -23,16 +23,20 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
-import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeDeleteTest;
-import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 import edu.uci.ics.hyracks.storage.am.rtree.utils.RTreeTestContext;
 import edu.uci.ics.hyracks.storage.am.rtree.utils.RTreeTestHarness;
 
 @SuppressWarnings("rawtypes")
 public class RTreeDeleteTest extends AbstractRTreeDeleteTest {
 
-    private final RTreeTestHarness harness = new RTreeTestHarness();
+	private final RTreeTestHarness harness = new RTreeTestHarness();
 
+	public RTreeDeleteTest() {
+		super(AccessMethodTestsConfig.RTREE_TEST_RSTAR_POLICY);
+	}
+	
     @Before
     public void setUp() throws HyracksDataException {
         harness.setUp();
@@ -45,9 +49,10 @@
 
     @Override
     protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys) throws Exception {
-        return RTreeTestContext.create(harness.getBufferCache(), harness.getTreeFileId(), fieldSerdes,
-                valueProviderFactories, numKeys);
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
+            throws Exception {
+        return RTreeTestContext.create(harness.getBufferCache(), harness.getFileMapProvider(),
+                harness.getFileReference(), fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType);
     }
 
     @Override
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeExamplesTest.java b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeExamplesTest.java
index c72338e..84c8642 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeExamplesTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeExamplesTest.java
@@ -24,7 +24,7 @@
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
-import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeExamplesTest;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
 import edu.uci.ics.hyracks.storage.am.rtree.utils.RTreeTestHarness;
 
@@ -43,14 +43,10 @@
 
     @Override
     protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
-            IBinaryComparatorFactory[] btreeCmpFactories, IPrimitiveValueProviderFactory[] valueProviderFactories)
-            throws TreeIndexException {
-        return RTreeUtils.createRTree(harness.getBufferCache(), typeTraits,
-                valueProviderFactories, rtreeCmpFactories);
+            IBinaryComparatorFactory[] btreeCmpFactories, IPrimitiveValueProviderFactory[] valueProviderFactories,
+            RTreePolicyType rtreePolicyType) throws TreeIndexException {
+        return RTreeUtils.createRTree(harness.getBufferCache(), harness.getFileMapProvider(), typeTraits,
+                valueProviderFactories, rtreeCmpFactories, rtreePolicyType, harness.getFileReference());
     }
 
-    @Override
-    protected int getIndexFileId() {
-        return harness.getTreeFileId();
-    }
 }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeInsertTest.java b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeInsertTest.java
index 6efa620..065f687 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeInsertTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeInsertTest.java
@@ -23,26 +23,20 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
-import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeInsertTest;
-import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 import edu.uci.ics.hyracks.storage.am.rtree.utils.RTreeTestContext;
 import edu.uci.ics.hyracks.storage.am.rtree.utils.RTreeTestHarness;
 
-/**
- * Tests the BTree insert operation with strings and integer fields using
- * various numbers of key and payload fields.
- * 
- * Each tests first fills a BTree with randomly generated tuples. We compare the
- * following operations against expected results: 1. Point searches for all
- * tuples. 2. Ordered scan. 3. Disk-order scan. 4. Range search (and prefix
- * search for composite keys).
- * 
- */
 @SuppressWarnings("rawtypes")
 public class RTreeInsertTest extends AbstractRTreeInsertTest {
 
-    private final RTreeTestHarness harness = new RTreeTestHarness();
+	private final RTreeTestHarness harness = new RTreeTestHarness();
 
+	public RTreeInsertTest() {
+		super(AccessMethodTestsConfig.RTREE_TEST_RSTAR_POLICY);
+	}
+	
     @Before
     public void setUp() throws HyracksDataException {
         harness.setUp();
@@ -55,9 +49,10 @@
 
     @Override
     protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys) throws Exception {
-        return RTreeTestContext.create(harness.getBufferCache(), harness.getTreeFileId(), fieldSerdes,
-                valueProviderFactories, numKeys);
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
+            throws Exception {
+        return RTreeTestContext.create(harness.getBufferCache(), harness.getFileMapProvider(),
+                harness.getFileReference(), fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType);
     }
 
     @Override
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeLifecycleTest.java b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeLifecycleTest.java
new file mode 100644
index 0000000..69c7e15
--- /dev/null
+++ b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeLifecycleTest.java
@@ -0,0 +1,79 @@
+package edu.uci.ics.hyracks.storage.am.rtree;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexLifecycleTest;
+import edu.uci.ics.hyracks.storage.am.common.CheckTuple;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestContext;
+import edu.uci.ics.hyracks.storage.am.common.TreeIndexTestUtils;
+import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
+import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
+import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
+import edu.uci.ics.hyracks.storage.am.rtree.utils.RTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.utils.RTreeTestHarness;
+
+public class RTreeLifecycleTest extends AbstractIndexLifecycleTest {
+    private final RTreeTestHarness harness = new RTreeTestHarness();
+    private final TreeIndexTestUtils titu = new RTreeTestUtils();
+
+    @SuppressWarnings("rawtypes")
+    private final ISerializerDeserializer[] fieldSerdes = { IntegerSerializerDeserializer.INSTANCE,
+            IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+            IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE };
+    private final IPrimitiveValueProviderFactory[] valueProviderFactories = RTreeUtils
+            .createPrimitiveValueProviderFactories(4, IntegerPointable.FACTORY);
+    private final int numKeys = 4;
+
+    @SuppressWarnings("rawtypes")
+    private IIndexTestContext<? extends CheckTuple> testCtx;
+    private ITreeIndexFrame frame = null;
+
+    @Override
+    public void setup() throws Exception {
+        harness.setUp();
+        testCtx = RTreeTestContext.create(harness.getBufferCache(), harness.getFileMapProvider(),
+                harness.getFileReference(), fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RTREE);
+        index = testCtx.getIndex();
+    }
+
+    @Override
+    public void tearDown() throws HyracksDataException {
+        testCtx.getIndex().deactivate();
+        testCtx.getIndex().destroy();
+        harness.tearDown();
+    }
+
+    @Override
+    protected boolean persistentStateExists() {
+        return harness.getFileReference().getFile().exists();
+    }
+
+    @Override
+    protected boolean isEmptyIndex() throws HyracksDataException {
+        RTree rtree = (RTree) testCtx.getIndex();
+        if (frame == null) {
+            frame = rtree.getInteriorFrameFactory().createFrame();
+        }
+        return rtree.isEmptyTree(frame);
+    }
+
+    @Override
+    protected void performInsertions() throws Exception {
+        titu.insertIntTuples(testCtx, 10, harness.getRandom());
+    }
+
+    @Override
+    protected void checkInsertions() throws Exception {
+        titu.checkScan(testCtx);
+    }
+
+    @Override
+    protected void clearCheckableInsertions() throws Exception {
+        testCtx.getCheckTuples().clear();
+    }
+
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeSearchCursorTest.java b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeSearchCursorTest.java
index 8332c11..06d18bb 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeSearchCursorTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/RTreeSearchCursorTest.java
@@ -41,13 +41,14 @@
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
 import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.freepage.LinkedListFreePageManager;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
-import edu.uci.ics.hyracks.storage.am.rtree.RTreeCheckTuple;
-import edu.uci.ics.hyracks.storage.am.rtree.RTreeTestUtils;
+import edu.uci.ics.hyracks.storage.am.common.util.HashMultiSet;
 import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeInteriorFrame;
 import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeLeafFrame;
 import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreeNSMInteriorFrameFactory;
 import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreeNSMLeafFrameFactory;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
 import edu.uci.ics.hyracks.storage.am.rtree.impls.RTreeSearchCursor;
 import edu.uci.ics.hyracks.storage.am.rtree.impls.SearchPredicate;
@@ -78,7 +79,6 @@
         }
 
         IBufferCache bufferCache = harness.getBufferCache();
-        int rtreeFileId = harness.getTreeFileId();
 
         // Declare fields.
         int fieldCount = 5;
@@ -109,22 +109,23 @@
         ITreeIndexMetaDataFrameFactory metaFrameFactory = new LIFOMetaDataFrameFactory();
 
         ITreeIndexFrameFactory interiorFrameFactory = new RTreeNSMInteriorFrameFactory(tupleWriterFactory,
-                valueProviderFactories);
+                valueProviderFactories, RTreePolicyType.RTREE);
         ITreeIndexFrameFactory leafFrameFactory = new RTreeNSMLeafFrameFactory(tupleWriterFactory,
-                valueProviderFactories);
+                valueProviderFactories, RTreePolicyType.RTREE);
 
         IRTreeInteriorFrame interiorFrame = (IRTreeInteriorFrame) interiorFrameFactory.createFrame();
         IRTreeLeafFrame leafFrame = (IRTreeLeafFrame) leafFrameFactory.createFrame();
         IFreePageManager freePageManager = new LinkedListFreePageManager(bufferCache, 0, metaFrameFactory);
 
-        RTree rtree = new RTree(bufferCache, fieldCount, cmpFactories, freePageManager, interiorFrameFactory,
-                leafFrameFactory);
-        rtree.create(rtreeFileId);
-        rtree.open(rtreeFileId);
+        RTree rtree = new RTree(bufferCache, harness.getFileMapProvider(), freePageManager, interiorFrameFactory,
+                leafFrameFactory, cmpFactories, fieldCount, harness.getFileReference());
+        rtree.create();
+        rtree.activate();
 
         ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
-        ITreeIndexAccessor indexAccessor = rtree.createAccessor();
+        ITreeIndexAccessor indexAccessor = rtree.createAccessor(NoOpOperationCallback.INSTANCE,
+                NoOpOperationCallback.INSTANCE);
         int numInserts = 10000;
         ArrayList<RTreeCheckTuple> checkTuples = new ArrayList<RTreeCheckTuple>();
         for (int i = 0; i < numInserts; i++) {
@@ -142,11 +143,11 @@
             } catch (TreeIndexException e) {
             }
             RTreeCheckTuple checkTuple = new RTreeCheckTuple(fieldCount, keyFieldCount);
-            checkTuple.add(Math.min(p1x, p2x));
-            checkTuple.add(Math.min(p1y, p2y));
-            checkTuple.add(Math.max(p1x, p2x));
-            checkTuple.add(Math.max(p1y, p2y));
-            checkTuple.add(pk);
+            checkTuple.appendField(Math.min(p1x, p2x));
+            checkTuple.appendField(Math.min(p1y, p2y));
+            checkTuple.appendField(Math.max(p1x, p2x));
+            checkTuple.appendField(Math.max(p1y, p2y));
+            checkTuple.appendField(pk);
 
             checkTuples.add(checkTuple);
         }
@@ -162,14 +163,16 @@
 
         RTreeCheckTuple keyCheck = (RTreeCheckTuple) rTreeTestUtils.createCheckTupleFromTuple(key, fieldSerdes,
                 keyFieldCount);
-        ArrayList<RTreeCheckTuple> expectedResult = rTreeTestUtils.getRangeSearchExpectedResults(checkTuples, keyCheck);
+        HashMultiSet<RTreeCheckTuple> expectedResult = rTreeTestUtils.getRangeSearchExpectedResults(checkTuples,
+                keyCheck);
 
         rTreeTestUtils.getRangeSearchExpectedResults(checkTuples, keyCheck);
         indexAccessor.search(searchCursor, searchPredicate);
 
         rTreeTestUtils.checkExpectedResults(searchCursor, expectedResult, fieldSerdes, keyFieldCount, null);
 
-        rtree.close();
+        rtree.deactivate();
+        rtree.destroy();
     }
 
 }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/multithread/RTreeMultiThreadTest.java b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/multithread/RTreeMultiThreadTest.java
index 7520793..ee245e8 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/multithread/RTreeMultiThreadTest.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/multithread/RTreeMultiThreadTest.java
@@ -20,18 +20,24 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.storage.am.common.ITreeIndexTestWorkerFactory;
-import edu.uci.ics.hyracks.storage.am.common.TestWorkloadConf;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestWorkerFactory;
 import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.TestWorkloadConf;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
+import edu.uci.ics.hyracks.storage.am.common.datagen.ProbabilityHelper;
 import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeMultiThreadTest;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
 import edu.uci.ics.hyracks.storage.am.rtree.utils.RTreeTestHarness;
 
 public class RTreeMultiThreadTest extends AbstractRTreeMultiThreadTest {
 
+    public RTreeMultiThreadTest() {
+        super(true);
+    }
+
     private RTreeTestHarness harness = new RTreeTestHarness();
 
     private RTreeTestWorkerFactory workerFactory = new RTreeTestWorkerFactory();
@@ -48,15 +54,15 @@
 
     @Override
     protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
-            IBinaryComparatorFactory[] btreeCmpFactories, IPrimitiveValueProviderFactory[] valueProviderFactories)
-            throws TreeIndexException {
-        return RTreeUtils.createRTree(harness.getBufferCache(), typeTraits,
-                valueProviderFactories, rtreeCmpFactories);
+            IBinaryComparatorFactory[] btreeCmpFactories, IPrimitiveValueProviderFactory[] valueProviderFactories,
+            RTreePolicyType rtreePolicyType) throws TreeIndexException {
+        return RTreeUtils.createRTree(harness.getBufferCache(), harness.getFileMapProvider(), typeTraits,
+                valueProviderFactories, rtreeCmpFactories, rtreePolicyType, harness.getFileReference());
 
     }
 
     @Override
-    protected ITreeIndexTestWorkerFactory getWorkerFactory() {
+    protected IIndexTestWorkerFactory getWorkerFactory() {
         return workerFactory;
     }
 
@@ -66,31 +72,29 @@
 
         // Insert only workload.
         TestOperation[] insertOnlyOps = new TestOperation[] { TestOperation.INSERT };
-        workloadConfs.add(new TestWorkloadConf(insertOnlyOps, getUniformOpProbs(insertOnlyOps)));
+        workloadConfs.add(new TestWorkloadConf(insertOnlyOps, ProbabilityHelper
+                .getUniformProbDist(insertOnlyOps.length)));
 
         // Inserts mixed with scans.
         TestOperation[] insertSearchOnlyOps = new TestOperation[] { TestOperation.INSERT, TestOperation.SCAN,
                 TestOperation.DISKORDER_SCAN };
-        workloadConfs.add(new TestWorkloadConf(insertSearchOnlyOps, getUniformOpProbs(insertSearchOnlyOps)));
+        workloadConfs.add(new TestWorkloadConf(insertSearchOnlyOps, ProbabilityHelper
+                .getUniformProbDist(insertSearchOnlyOps.length)));
 
         // Inserts and deletes.
         TestOperation[] insertDeleteOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE };
-        workloadConfs.add(new TestWorkloadConf(insertDeleteOps, getUniformOpProbs(insertDeleteOps)));
+        workloadConfs.add(new TestWorkloadConf(insertDeleteOps, ProbabilityHelper
+                .getUniformProbDist(insertDeleteOps.length)));
 
         // All operations mixed.
         TestOperation[] allOps = new TestOperation[] { TestOperation.INSERT, TestOperation.DELETE, TestOperation.SCAN,
                 TestOperation.DISKORDER_SCAN };
-        workloadConfs.add(new TestWorkloadConf(allOps, getUniformOpProbs(allOps)));
+        workloadConfs.add(new TestWorkloadConf(allOps, ProbabilityHelper.getUniformProbDist(allOps.length)));
 
         return workloadConfs;
     }
 
     @Override
-    protected int getFileId() {
-        return harness.getTreeFileId();
-    }
-
-    @Override
     protected String getIndexTypeName() {
         return "RTree";
     }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/multithread/RTreeTestWorker.java b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/multithread/RTreeTestWorker.java
index f5867e6..3d0381b 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/multithread/RTreeTestWorker.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/multithread/RTreeTestWorker.java
@@ -19,11 +19,11 @@
 import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
 import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleReference;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
-import edu.uci.ics.hyracks.storage.am.common.AbstractTreeIndexTestWorker;
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexTestWorker;
 import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector;
 import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector.TestOperation;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
 import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
@@ -31,14 +31,14 @@
 import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
 import edu.uci.ics.hyracks.storage.am.rtree.impls.SearchPredicate;
 
-public class RTreeTestWorker extends AbstractTreeIndexTestWorker {
+public class RTreeTestWorker extends AbstractIndexTestWorker {
 
     private final RTree rtree;
     private final int numFields;
     private final ArrayTupleReference rearrangedTuple = new ArrayTupleReference();
     private final ArrayTupleBuilder rearrangedTb;
 
-    public RTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, ITreeIndex index, int numBatches) {
+    public RTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches) {
         super(dataGen, opSelector, index, numBatches);
         rtree = (RTree) index;
         numFields = rtree.getFieldCount();
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/multithread/RTreeTestWorkerFactory.java b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/multithread/RTreeTestWorkerFactory.java
index d4f14ca..36b47bb 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/multithread/RTreeTestWorkerFactory.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/multithread/RTreeTestWorkerFactory.java
@@ -15,16 +15,16 @@
 
 package edu.uci.ics.hyracks.storage.am.rtree.multithread;
 
-import edu.uci.ics.hyracks.storage.am.common.AbstractTreeIndexTestWorker;
-import edu.uci.ics.hyracks.storage.am.common.ITreeIndexTestWorkerFactory;
+import edu.uci.ics.hyracks.storage.am.common.AbstractIndexTestWorker;
+import edu.uci.ics.hyracks.storage.am.common.IIndexTestWorkerFactory;
 import edu.uci.ics.hyracks.storage.am.common.TestOperationSelector;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.datagen.DataGenThread;
 
-public class RTreeTestWorkerFactory implements ITreeIndexTestWorkerFactory {
+public class RTreeTestWorkerFactory implements IIndexTestWorkerFactory {
     @Override
-    public AbstractTreeIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector,
-            ITreeIndex index, int numBatches) {
+    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector,
+            IIndex index, int numBatches) {
         return new RTreeTestWorker(dataGen, opSelector, index, numBatches);
     }
 }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/utils/RTreeTestContext.java b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/utils/RTreeTestContext.java
index 039fb0b..8c1f0aa 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/utils/RTreeTestContext.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/utils/RTreeTestContext.java
@@ -18,13 +18,16 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.rtree.AbstractRTreeTestContext;
+import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
 import edu.uci.ics.hyracks.storage.am.rtree.util.RTreeUtils;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
 @SuppressWarnings("rawtypes")
 public class RTreeTestContext extends AbstractRTreeTestContext {
@@ -35,25 +38,24 @@
 
     @Override
     public int getKeyFieldCount() {
-        RTree rtree = (RTree) treeIndex;
+        RTree rtree = (RTree) index;
         return rtree.getComparatorFactories().length;
     }
 
     @Override
     public IBinaryComparatorFactory[] getComparatorFactories() {
-        RTree rtree = (RTree) treeIndex;
+        RTree rtree = (RTree) index;
         return rtree.getComparatorFactories();
     }
 
-    public static RTreeTestContext create(IBufferCache bufferCache, int rtreeFileId,
-            ISerializerDeserializer[] fieldSerdes, IPrimitiveValueProviderFactory[] valueProviderFactories,
-            int numKeyFields) throws Exception {
+    public static RTreeTestContext create(IBufferCache bufferCache, IFileMapProvider fileMapProvider,
+            FileReference file, ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeyFields, RTreePolicyType rtreePolicyType)
+            throws Exception {
         ITypeTraits[] typeTraits = SerdeUtils.serdesToTypeTraits(fieldSerdes);
         IBinaryComparatorFactory[] cmpFactories = SerdeUtils.serdesToComparatorFactories(fieldSerdes, numKeyFields);
-        RTree rtree = RTreeUtils
-                .createRTree(bufferCache, typeTraits, valueProviderFactories, cmpFactories);
-        rtree.create(rtreeFileId);
-        rtree.open(rtreeFileId);
+        RTree rtree = RTreeUtils.createRTree(bufferCache, fileMapProvider, typeTraits, valueProviderFactories,
+                cmpFactories, rtreePolicyType, file);
         RTreeTestContext testCtx = new RTreeTestContext(fieldSerdes, rtree);
         return testCtx;
     }
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/utils/RTreeTestHarness.java b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/utils/RTreeTestHarness.java
index c0cec35..e324a7f 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/utils/RTreeTestHarness.java
+++ b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/rtree/utils/RTreeTestHarness.java
@@ -23,6 +23,7 @@
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
@@ -31,10 +32,6 @@
 public class RTreeTestHarness {
 
     private static final long RANDOM_SEED = 50;
-    private static final int DEFAULT_PAGE_SIZE = 256;
-    private static final int DEFAULT_NUM_PAGES = 1000;
-    private static final int DEFAULT_MAX_OPEN_FILES = 10;
-    private static final int DEFAULT_HYRACKS_FRAME_SIZE = 128;
 
     protected final int pageSize;
     protected final int numPages;
@@ -43,6 +40,7 @@
 
     protected IHyracksTaskContext ctx;
     protected IBufferCache bufferCache;
+    protected IFileMapProvider fileMapProvider;
     protected int treeFileId;
 
     protected final Random rnd = new Random();
@@ -50,12 +48,13 @@
     protected final String tmpDir = System.getProperty("java.io.tmpdir");
     protected final String sep = System.getProperty("file.separator");
     protected String fileName;
+    protected FileReference file;
 
     public RTreeTestHarness() {
-        this.pageSize = DEFAULT_PAGE_SIZE;
-        this.numPages = DEFAULT_NUM_PAGES;
-        this.maxOpenFiles = DEFAULT_MAX_OPEN_FILES;
-        this.hyracksFrameSize = DEFAULT_HYRACKS_FRAME_SIZE;
+        this.pageSize = AccessMethodTestsConfig.RTREE_PAGE_SIZE;
+        this.numPages = AccessMethodTestsConfig.RTREE_NUM_PAGES;
+        this.maxOpenFiles = AccessMethodTestsConfig.RTREE_MAX_OPEN_FILES;
+        this.hyracksFrameSize = AccessMethodTestsConfig.RTREE_HYRACKS_FRAME_SIZE;
     }
 
     public RTreeTestHarness(int pageSize, int numPages, int maxOpenFiles, int hyracksFrameSize) {
@@ -67,19 +66,15 @@
 
     public void setUp() throws HyracksDataException {
         fileName = tmpDir + sep + simpleDateFormat.format(new Date());
+        file = new FileReference(new File(fileName));
         ctx = TestUtils.create(getHyracksFrameSize());
         TestStorageManagerComponentHolder.init(pageSize, numPages, maxOpenFiles);
         bufferCache = TestStorageManagerComponentHolder.getBufferCache(ctx);
-        IFileMapProvider fmp = TestStorageManagerComponentHolder.getFileMapProvider(ctx);
-        FileReference file = new FileReference(new File(fileName));
-        bufferCache.createFile(file);
-        treeFileId = fmp.lookupFileId(file);
-        bufferCache.openFile(treeFileId);
+        fileMapProvider = TestStorageManagerComponentHolder.getFileMapProvider(ctx);
         rnd.setSeed(RANDOM_SEED);
     }
 
     public void tearDown() throws HyracksDataException {
-        bufferCache.closeFile(treeFileId);
         bufferCache.close();
         File f = new File(fileName);
         f.deleteOnExit();
@@ -93,8 +88,8 @@
         return bufferCache;
     }
 
-    public int getTreeFileId() {
-        return treeFileId;
+    public IFileMapProvider getFileMapProvider() {
+        return fileMapProvider;
     }
 
     public String getFileName() {
@@ -120,4 +115,8 @@
     public int getMaxOpenFiles() {
         return maxOpenFiles;
     }
+
+    public FileReference getFileReference() {
+        return file;
+    }
 }
diff --git a/hyracks/hyracks-tests/hyracks-storage-common-test/pom.xml b/hyracks/hyracks-tests/hyracks-storage-common-test/pom.xml
index 72d76e0..7abf086 100644
--- a/hyracks/hyracks-tests/hyracks-storage-common-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-common-test/pom.xml
@@ -1,14 +1,12 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-common-test</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-common-test</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-tests</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -36,13 +34,13 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-common</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.4-SNAPSHOT</version>
+  		<version>0.2.5-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-tests/pom.xml b/hyracks/hyracks-tests/pom.xml
index 5a3d594..38ddadc 100644
--- a/hyracks/hyracks-tests/pom.xml
+++ b/hyracks/hyracks-tests/pom.xml
@@ -1,21 +1,23 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-tests</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>hyracks-tests</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.5-SNAPSHOT</version>
   </parent>
 
   <modules>
     <module>hyracks-storage-common-test</module>
     <module>hyracks-storage-am-btree-test</module>
-    <module>hyracks-storage-am-invertedindex-test</module>
     <module>hyracks-storage-am-rtree-test</module>
+    <module>hyracks-storage-am-lsm-common-test</module>
+    <module>hyracks-storage-am-lsm-btree-test</module>
+    <module>hyracks-storage-am-lsm-rtree-test</module>
+    <module>hyracks-storage-am-lsm-invertedindex-test</module>
+    <module>hyracks-storage-am-bloomfilter-test</module>
   </modules>
 </project>
diff --git a/hyracks/hyracks-yarn/hyracks-yarn-am/src/main/java/edu/uci/ics/hyracks/yarn/am/HyracksYarnApplicationMaster.java b/hyracks/hyracks-yarn/hyracks-yarn-am/src/main/java/edu/uci/ics/hyracks/yarn/am/HyracksYarnApplicationMaster.java
index a9c4520..e56285a 100644
--- a/hyracks/hyracks-yarn/hyracks-yarn-am/src/main/java/edu/uci/ics/hyracks/yarn/am/HyracksYarnApplicationMaster.java
+++ b/hyracks/hyracks-yarn/hyracks-yarn-am/src/main/java/edu/uci/ics/hyracks/yarn/am/HyracksYarnApplicationMaster.java
@@ -23,14 +23,18 @@
 import java.util.Set;
 import java.util.Timer;
 import java.util.TimerTask;
+import java.util.concurrent.atomic.AtomicInteger;
 
 import org.apache.commons.io.FileUtils;
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.yarn.api.ApplicationConstants;
 import org.apache.hadoop.yarn.api.protocolrecords.AllocateRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.AllocateResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterResponse;
+import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 import org.apache.hadoop.yarn.api.records.Container;
+import org.apache.hadoop.yarn.api.records.ContainerId;
 import org.apache.hadoop.yarn.api.records.ContainerStatus;
 import org.apache.hadoop.yarn.api.records.NodeId;
 import org.apache.hadoop.yarn.api.records.Priority;
@@ -38,6 +42,7 @@
 import org.apache.hadoop.yarn.api.records.ResourceRequest;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.exceptions.YarnRemoteException;
+import org.apache.hadoop.yarn.util.ConverterUtils;
 import org.apache.hadoop.yarn.util.Records;
 import org.kohsuke.args4j.CmdLineParser;
 
@@ -59,6 +64,10 @@
 
     private final Map<AbstractProcess, AskRecord> proc2AskMap;
 
+    private final AtomicInteger lastResponseId;
+
+    private final ApplicationAttemptId appAttemptId;
+
     private YarnConfiguration config;
 
     private AMRMConnection amrmc;
@@ -73,6 +82,11 @@
         asks = new ArrayList<ResourceRequest>();
         resource2AskMap = new HashMap<Resource, Set<AskRecord>>();
         proc2AskMap = new HashMap<AbstractProcess, AskRecord>();
+        lastResponseId = new AtomicInteger();
+
+        String containerIdStr = System.getenv(ApplicationConstants.AM_CONTAINER_ID_ENV);
+        ContainerId containerId = ConverterUtils.toContainerId(containerIdStr);
+        appAttemptId = containerId.getApplicationAttemptId();
     }
 
     private void run() throws Exception {
@@ -103,7 +117,7 @@
         rsrcRequest.setHostName(cSpec.getHostname());
 
         Priority pri = Records.newRecord(Priority.class);
-        pri.setPriority(100);
+        pri.setPriority(0);
         rsrcRequest.setPriority(pri);
 
         Resource capability = Records.newRecord(Resource.class);
@@ -124,7 +138,8 @@
         arSet.add(ar);
         proc2AskMap.put(proc, ar);
 
-        System.err.println(proc + " -> " + rsrcRequest);
+        System.err.println(proc + " -> [" + rsrcRequest.getHostName() + ", " + rsrcRequest.getNumContainers() + ", "
+                + rsrcRequest.getPriority() + ", " + rsrcRequest.getCapability().getMemory() + "]");
 
         asks.add(rsrcRequest);
     }
@@ -162,11 +177,14 @@
 
     private synchronized void populateAllocateRequest(AllocateRequest hb) {
         hb.addAllAsks(asks);
-        asks.clear();
+        hb.addAllReleases(new ArrayList<ContainerId>());
+        hb.setResponseId(lastResponseId.incrementAndGet());
+        hb.setApplicationAttemptId(appAttemptId);
     }
 
     private synchronized void processAllocation(List<Container> allocatedContainers,
             List<ContainerStatus> completedContainers) {
+        System.err.println(allocatedContainers);
         for (Container c : allocatedContainers) {
             System.err.println("Got container: " + c.getContainerStatus());
             NodeId nodeId = c.getNodeId();
diff --git a/hyracks/hyracks-yarn/hyracks-yarn-client/src/main/java/edu/uci/ics/hyracks/yarn/client/LaunchHyracksApplication.java b/hyracks/hyracks-yarn/hyracks-yarn-client/src/main/java/edu/uci/ics/hyracks/yarn/client/LaunchHyracksApplication.java
index e12891e..0eb930e 100644
--- a/hyracks/hyracks-yarn/hyracks-yarn-client/src/main/java/edu/uci/ics/hyracks/yarn/client/LaunchHyracksApplication.java
+++ b/hyracks/hyracks-yarn/hyracks-yarn-client/src/main/java/edu/uci/ics/hyracks/yarn/client/LaunchHyracksApplication.java
@@ -53,7 +53,6 @@
 
         File amZipFile = new File(System.getProperty("basedir") + "/hyracks-yarn-am/hyracks-yarn-am.zip");
         localResources.put("archive", LocalResourceHelper.createArchiveResource(conf, amZipFile));
-        localResources.put("manifest.xml", LocalResourceHelper.createFileResource(conf, options.hcManifest));
         clCtx.setLocalResources(localResources);
 
         String command = "./archive/bin/hyracks-yarn-am 1>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR + "/stdout"
@@ -84,10 +83,19 @@
         @Option(name = "-application-name", required = true, usage = "Application Name")
         String appName;
 
+        @Option(name = "-am-host", required = false, usage = "Application master host name (default: *). Currently has NO effect")
+        String amHostName = "*";
+
         @Option(name = "-am-memory", required = false, usage = "Application Master memory requirements")
         int amMemory = 128;
 
-        @Option(name = "-hyracks-cluster-manifest", required = true, usage = "Hyracks Cluster Manifest file")
-        File hcManifest;
+        @Option(name = "-workers", required = true, usage = "Number of worker containers")
+        int nWorkers;
+
+        @Option(name = "-worker-memory", required = true, usage = "Amount of memory to provide to each worker")
+        int workerMemory;
+
+        @Option(name = "-extra-jars", required = false, usage = "Other jars that need to be added to the classpath")
+        String extraJars = "";
     }
 }
\ No newline at end of file
diff --git a/hyracks/pom.xml b/hyracks/pom.xml
index 2810aa1..7972b10 100644
--- a/hyracks/pom.xml
+++ b/hyracks/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
+  <version>0.2.5-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>hyracks</name>
 
@@ -18,36 +18,26 @@
         <artifactId>maven-release-plugin</artifactId>
         <version>2.0</version>
         <configuration>
-            <goals>package source:jar javadoc:jar deploy:deploy</goals>
+          <goals>package source:jar javadoc:jar deploy:deploy</goals>
         </configuration>
       </plugin>
       <plugin>
-      	<groupId>org.codehaus.mojo</groupId>
-      	<artifactId>versions-maven-plugin</artifactId>
-      	<version>1.2</version>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>versions-maven-plugin</artifactId>
+        <version>1.2</version>
       </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>2.13</version>
+        <version>2.12</version>
         <configuration>
-            <forkMode>pertest</forkMode>
-            <argLine>-enableassertions -Djava.util.logging.config.file=${user.home}/logging.properties -Xdebug -Xrunjdwp:transport=dt_socket,server=y,address=8000,suspend=n ${jvm.extraargs}</argLine>
+          <forkMode>pertest</forkMode>
+          <argLine>-enableassertions -Djava.util.logging.config.file=${user.home}/logging.properties -Xdebug -Xrunjdwp:transport=dt_socket,server=y,address=8000,suspend=n ${jvm.extraargs} -Xmx2048m</argLine>
         </configuration>
       </plugin>
     </plugins>
   </build>
 
-  <reporting>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-changelog-plugin</artifactId>
-        <version>2.2</version>
-      </plugin>
-    </plugins>
-  </reporting>
-
   <distributionManagement>
     <repository>
       <id>hyracks-releases</id>
@@ -91,11 +81,14 @@
     <module>hyracks-control</module>
     <module>hyracks-net</module>
     <module>hyracks-data</module>
-    <module>hyracks-cli</module>
     <module>hyracks-storage-common</module>
     <module>hyracks-storage-am-common</module>
+    <module>hyracks-storage-am-bloomfilter</module>
     <module>hyracks-storage-am-btree</module>
-    <module>hyracks-storage-am-invertedindex</module>
+    <module>hyracks-storage-am-lsm-invertedindex</module>
+    <module>hyracks-storage-am-lsm-common</module>
+    <module>hyracks-storage-am-lsm-btree</module>
+    <module>hyracks-storage-am-lsm-rtree</module>
     <module>hyracks-storage-am-rtree</module>
     <module>hyracks-test-support</module>
     <module>hyracks-tests</module>
@@ -103,9 +96,9 @@
     <module>hyracks-examples</module>
     <module>hyracks-documentation</module>
     <module>hyracks-hadoop-compat</module>
-    <!--module>hyracks-yarn</module-->
     <module>hyracks-maven-plugins</module>
     <module>hyracks-hdfs</module>
     <module>hyracks-dist</module>
+    <!--module>hyracks-yarn</module -->
   </modules>
 </project>
diff --git a/pom.xml b/pom.xml
index 1042f6e..2933182 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>fullstack</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
+  <version>0.2.5-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>hyracks-ecosystem-full-stack</name>
 
diff --git a/pregelix/pom.xml b/pregelix/pom.xml
index 0d2bdba..46fe7e6 100644
--- a/pregelix/pom.xml
+++ b/pregelix/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>pregelix</artifactId>
-  <version>0.2.4-SNAPSHOT</version>
+  <version>0.2.5-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>pregelix</name>
 
@@ -44,7 +44,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>2.13</version>
+        <version>2.12</version>
         <configuration>
             <forkMode>pertest</forkMode>
             <argLine>-enableassertions -Djava.util.logging.config.file=${user.home}/logging.properties -Xdebug -Xrunjdwp:transport=dt_socket,server=y,address=8000,suspend=n ${jvm.extraargs}</argLine>
@@ -53,16 +53,6 @@
     </plugins>
   </build>
 
-  <reporting>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-changelog-plugin</artifactId>
-        <version>2.2</version>
-      </plugin>
-    </plugins>
-  </reporting>
-
   <distributionManagement>
     <repository>
       <id>hyracks-releases</id>
diff --git a/pregelix/pregelix-api/pom.xml b/pregelix/pregelix-api/pom.xml
index b8bfce9..d8a49e0 100644
--- a/pregelix/pregelix-api/pom.xml
+++ b/pregelix/pregelix-api/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 	<properties>
@@ -41,9 +41,10 @@
 				</configuration>
 			</plugin>
 			<plugin>
-				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
-				<configuration>
+				<groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-clean-plugin</artifactId>
+                <version>2.4.1</version>
+                <configuration>
 					<filesets>
 						<fileset>
 							<directory>.</directory>
@@ -67,7 +68,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -80,7 +81,7 @@
 		<dependency>
                         <groupId>edu.uci.ics.hyracks</groupId>
                         <artifactId>hyracks-hdfs-core</artifactId>
-                        <version>0.2.4-SNAPSHOT</version>
+                        <version>0.2.5-SNAPSHOT</version>
                         <type>jar</type>
                         <scope>compile</scope>
                 </dependency>
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/Vertex.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/Vertex.java
index 724ec14..e51d4bc 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/Vertex.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/Vertex.java
@@ -49,531 +49,524 @@
  */
 @SuppressWarnings("rawtypes")
 public abstract class Vertex<I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable>
-		implements Writable {
-	private static long superstep = 0;
-	/** Class-wide number of vertices */
-	private static long numVertices = -1;
-	/** Class-wide number of edges */
-	private static long numEdges = -1;
-	/** Vertex id */
-	private I vertexId = null;
-	/** Vertex value */
-	private V vertexValue = null;
-	/** Map of destination vertices and their edge values */
-	private final List<Edge<I, E>> destEdgeList = new ArrayList<Edge<I, E>>();
-	/** If true, do not do anymore computation on this vertex. */
-	boolean halt = false;
-	/** List of incoming messages from the previous superstep */
-	private final List<M> msgList = new ArrayList<M>();
-	/** map context */
-	private static TaskAttemptContext context = null;
-	/** a delegate for hyracks stuff */
-	private VertexDelegate<I, V, E, M> delegate = new VertexDelegate<I, V, E, M>(
-			this);
-	/** this vertex is updated or not */
-	private boolean updated = false;
-	/** has outgoing messages */
-	private boolean hasMessage = false;
-	/** created new vertex */
-	private boolean createdNewLiveVertex = false;
+        implements Writable {
+    private static long superstep = 0;
+    /** Class-wide number of vertices */
+    private static long numVertices = -1;
+    /** Class-wide number of edges */
+    private static long numEdges = -1;
+    /** Vertex id */
+    private I vertexId = null;
+    /** Vertex value */
+    private V vertexValue = null;
+    /** Map of destination vertices and their edge values */
+    private final List<Edge<I, E>> destEdgeList = new ArrayList<Edge<I, E>>();
+    /** If true, do not do anymore computation on this vertex. */
+    boolean halt = false;
+    /** List of incoming messages from the previous superstep */
+    private final List<M> msgList = new ArrayList<M>();
+    /** map context */
+    private static TaskAttemptContext context = null;
+    /** a delegate for hyracks stuff */
+    private VertexDelegate<I, V, E, M> delegate = new VertexDelegate<I, V, E, M>(this);
+    /** this vertex is updated or not */
+    private boolean updated = false;
+    /** has outgoing messages */
+    private boolean hasMessage = false;
+    /** created new vertex */
+    private boolean createdNewLiveVertex = false;
 
-	/**
-	 * use object pool for re-using objects
-	 */
-	private List<Edge<I, E>> edgePool = new ArrayList<Edge<I, E>>();
-	private List<M> msgPool = new ArrayList<M>();
-	private List<V> valuePool = new ArrayList<V>();
-	private int usedEdge = 0;
-	private int usedMessage = 0;
-	private int usedValue = 0;
+    /**
+     * use object pool for re-using objects
+     */
+    private List<Edge<I, E>> edgePool = new ArrayList<Edge<I, E>>();
+    private List<M> msgPool = new ArrayList<M>();
+    private List<V> valuePool = new ArrayList<V>();
+    private int usedEdge = 0;
+    private int usedMessage = 0;
+    private int usedValue = 0;
 
-	/**
-	 * The key method that users need to implement
-	 * 
-	 * @param msgIterator
-	 *            an iterator of incoming messages
-	 */
-	public abstract void compute(Iterator<M> msgIterator);
+    /**
+     * The key method that users need to implement
+     * 
+     * @param msgIterator
+     *            an iterator of incoming messages
+     */
+    public abstract void compute(Iterator<M> msgIterator);
 
-	/**
-	 * Add an edge for the vertex.
-	 * 
-	 * @param targetVertexId
-	 * @param edgeValue
-	 * @return successful or not
-	 */
-	public final boolean addEdge(I targetVertexId, E edgeValue) {
-		Edge<I, E> edge = this.allocateEdge();
-		edge.setDestVertexId(targetVertexId);
-		edge.setEdgeValue(edgeValue);
-		destEdgeList.add(edge);
-		updated = true;
-		return true;
-	}
+    /**
+     * Add an edge for the vertex.
+     * 
+     * @param targetVertexId
+     * @param edgeValue
+     * @return successful or not
+     */
+    public final boolean addEdge(I targetVertexId, E edgeValue) {
+        Edge<I, E> edge = this.allocateEdge();
+        edge.setDestVertexId(targetVertexId);
+        edge.setEdgeValue(edgeValue);
+        destEdgeList.add(edge);
+        updated = true;
+        return true;
+    }
 
-	/**
-	 * Initialize a new vertex
-	 * 
-	 * @param vertexId
-	 * @param vertexValue
-	 * @param edges
-	 * @param messages
-	 */
-	public void initialize(I vertexId, V vertexValue, Map<I, E> edges,
-			List<M> messages) {
-		if (vertexId != null) {
-			setVertexId(vertexId);
-		}
-		if (vertexValue != null) {
-			setVertexValue(vertexValue);
-		}
-		destEdgeList.clear();
-		if (edges != null && !edges.isEmpty()) {
-			for (Map.Entry<I, E> entry : edges.entrySet()) {
-				destEdgeList.add(new Edge<I, E>(entry.getKey(), entry
-						.getValue()));
-			}
-		}
-		if (messages != null && !messages.isEmpty()) {
-			msgList.addAll(messages);
-		}
-	}
+    /**
+     * Initialize a new vertex
+     * 
+     * @param vertexId
+     * @param vertexValue
+     * @param edges
+     * @param messages
+     */
+    public void initialize(I vertexId, V vertexValue, Map<I, E> edges, List<M> messages) {
+        if (vertexId != null) {
+            setVertexId(vertexId);
+        }
+        if (vertexValue != null) {
+            setVertexValue(vertexValue);
+        }
+        destEdgeList.clear();
+        if (edges != null && !edges.isEmpty()) {
+            for (Map.Entry<I, E> entry : edges.entrySet()) {
+                destEdgeList.add(new Edge<I, E>(entry.getKey(), entry.getValue()));
+            }
+        }
+        if (messages != null && !messages.isEmpty()) {
+            msgList.addAll(messages);
+        }
+    }
 
-	/**
-	 * reset a vertex object: clear its internal states
-	 */
-	public void reset() {
-		usedEdge = 0;
-		usedMessage = 0;
-		usedValue = 0;
-		updated = false;
-	}
+    /**
+     * reset a vertex object: clear its internal states
+     */
+    public void reset() {
+        usedEdge = 0;
+        usedMessage = 0;
+        usedValue = 0;
+        updated = false;
+    }
 
-	/**
-	 * Set the vertex id
-	 * 
-	 * @param vertexId
-	 */
-	public final void setVertexId(I vertexId) {
-		this.vertexId = vertexId;
-		delegate.setVertexId(vertexId);
-	}
+    /**
+     * Set the vertex id
+     * 
+     * @param vertexId
+     */
+    public final void setVertexId(I vertexId) {
+        this.vertexId = vertexId;
+        delegate.setVertexId(vertexId);
+    }
 
-	/**
-	 * Get the vertex id
-	 * 
-	 * @return vertex id
-	 */
-	public final I getVertexId() {
-		return vertexId;
-	}
+    /**
+     * Get the vertex id
+     * 
+     * @return vertex id
+     */
+    public final I getVertexId() {
+        return vertexId;
+    }
 
-	/**
-	 * Get the vertex value
-	 * 
-	 * @return the vertex value
-	 */
-	public final V getVertexValue() {
-		return vertexValue;
-	}
+    /**
+     * Get the vertex value
+     * 
+     * @return the vertex value
+     */
+    public final V getVertexValue() {
+        return vertexValue;
+    }
 
-	/**
-	 * Set the vertex value
-	 * 
-	 * @param vertexValue
-	 */
-	public final void setVertexValue(V vertexValue) {
-		this.vertexValue = vertexValue;
-		this.updated = true;
-	}
+    /**
+     * Set the vertex value
+     * 
+     * @param vertexValue
+     */
+    public final void setVertexValue(V vertexValue) {
+        this.vertexValue = vertexValue;
+        this.updated = true;
+    }
 
-	/***
-	 * Send a message to a specific vertex
-	 * 
-	 * @param id
-	 *            the receiver vertex id
-	 * @param msg
-	 *            the message
-	 */
-	public final void sendMsg(I id, M msg) {
-		if (msg == null) {
-			throw new IllegalArgumentException(
-					"sendMsg: Cannot send null message to " + id);
-		}
-		delegate.sendMsg(id, msg);
-		this.hasMessage = true;
-	}
+    /***
+     * Send a message to a specific vertex
+     * 
+     * @param id
+     *            the receiver vertex id
+     * @param msg
+     *            the message
+     */
+    public final void sendMsg(I id, M msg) {
+        if (msg == null) {
+            throw new IllegalArgumentException("sendMsg: Cannot send null message to " + id);
+        }
+        delegate.sendMsg(id, msg);
+        this.hasMessage = true;
+    }
 
-	/**
-	 * Send a message to all direct outgoing neighbors
-	 * 
-	 * @param msg
-	 *            the message
-	 */
-	public final void sendMsgToAllEdges(M msg) {
-		if (msg == null) {
-			throw new IllegalArgumentException(
-					"sendMsgToAllEdges: Cannot send null message to all edges");
-		}
-		for (Edge<I, E> edge : destEdgeList) {
-			sendMsg(edge.getDestVertexId(), msg);
-		}
-	}
+    /**
+     * Send a message to all direct outgoing neighbors
+     * 
+     * @param msg
+     *            the message
+     */
+    public final void sendMsgToAllEdges(M msg) {
+        if (msg == null) {
+            throw new IllegalArgumentException("sendMsgToAllEdges: Cannot send null message to all edges");
+        }
+        for (Edge<I, E> edge : destEdgeList) {
+            sendMsg(edge.getDestVertexId(), msg);
+        }
+    }
 
-	/**
-	 * Vote to halt. Once all vertex vote to halt and no more messages, a
-	 * Pregelix job will terminate.
-	 */
-	public final void voteToHalt() {
-		halt = true;
-		updated = true;
-	}
+    /**
+     * Vote to halt. Once all vertex vote to halt and no more messages, a
+     * Pregelix job will terminate.
+     */
+    public final void voteToHalt() {
+        halt = true;
+        updated = true;
+    }
 
-	/**
-	 * @return the vertex is halted (true) or not (false)
-	 */
-	public final boolean isHalted() {
-		return halt;
-	}
+    /**
+     * Activate a halted vertex such that it is alive again.
+     */
+    public final void activate() {
+        halt = false;
+        updated = true;
+    }
 
-	@Override
-	final public void readFields(DataInput in) throws IOException {
-		reset();
-		if (vertexId == null)
-			vertexId = BspUtils.<I> createVertexIndex(getContext()
-					.getConfiguration());
-		vertexId.readFields(in);
-		delegate.setVertexId(vertexId);
-		boolean hasVertexValue = in.readBoolean();
+    /**
+     * @return the vertex is halted (true) or not (false)
+     */
+    public final boolean isHalted() {
+        return halt;
+    }
 
-		if (hasVertexValue) {
-			vertexValue = allocateValue();
-			vertexValue.readFields(in);
-			delegate.setVertex(this);
-		}
-		destEdgeList.clear();
-		long edgeMapSize = SerDeUtils.readVLong(in);
-		for (long i = 0; i < edgeMapSize; ++i) {
-			Edge<I, E> edge = allocateEdge();
-			edge.setConf(getContext().getConfiguration());
-			edge.readFields(in);
-			addEdge(edge);
-		}
-		msgList.clear();
-		long msgListSize = SerDeUtils.readVLong(in);
-		for (long i = 0; i < msgListSize; ++i) {
-			M msg = allocateMessage();
-			msg.readFields(in);
-			msgList.add(msg);
-		}
-		halt = in.readBoolean();
-		updated = false;
-		hasMessage = false;
-		createdNewLiveVertex = false;
-	}
+    @Override
+    final public void readFields(DataInput in) throws IOException {
+        reset();
+        if (vertexId == null)
+            vertexId = BspUtils.<I> createVertexIndex(getContext().getConfiguration());
+        vertexId.readFields(in);
+        delegate.setVertexId(vertexId);
+        boolean hasVertexValue = in.readBoolean();
 
-	@Override
-	public void write(DataOutput out) throws IOException {
-		vertexId.write(out);
-		out.writeBoolean(vertexValue != null);
-		if (vertexValue != null) {
-			vertexValue.write(out);
-		}
-		SerDeUtils.writeVLong(out, destEdgeList.size());
-		for (Edge<I, E> edge : destEdgeList) {
-			edge.write(out);
-		}
-		SerDeUtils.writeVLong(out, msgList.size());
-		for (M msg : msgList) {
-			msg.write(out);
-		}
-		out.writeBoolean(halt);
-	}
+        if (hasVertexValue) {
+            vertexValue = allocateValue();
+            vertexValue.readFields(in);
+            delegate.setVertex(this);
+        }
+        destEdgeList.clear();
+        long edgeMapSize = SerDeUtils.readVLong(in);
+        for (long i = 0; i < edgeMapSize; ++i) {
+            Edge<I, E> edge = allocateEdge();
+            edge.setConf(getContext().getConfiguration());
+            edge.readFields(in);
+            addEdge(edge);
+        }
+        msgList.clear();
+        long msgListSize = SerDeUtils.readVLong(in);
+        for (long i = 0; i < msgListSize; ++i) {
+            M msg = allocateMessage();
+            msg.readFields(in);
+            msgList.add(msg);
+        }
+        halt = in.readBoolean();
+        updated = false;
+        hasMessage = false;
+        createdNewLiveVertex = false;
+    }
 
-	/**
-	 * Get the list of incoming messages
-	 * 
-	 * @return the list of messages
-	 */
-	public List<M> getMsgList() {
-		return msgList;
-	}
+    @Override
+    public void write(DataOutput out) throws IOException {
+        vertexId.write(out);
+        out.writeBoolean(vertexValue != null);
+        if (vertexValue != null) {
+            vertexValue.write(out);
+        }
+        SerDeUtils.writeVLong(out, destEdgeList.size());
+        for (Edge<I, E> edge : destEdgeList) {
+            edge.write(out);
+        }
+        SerDeUtils.writeVLong(out, msgList.size());
+        for (M msg : msgList) {
+            msg.write(out);
+        }
+        out.writeBoolean(halt);
+    }
 
-	/**
-	 * Get outgoing edge list
-	 * 
-	 * @return a list of outgoing edges
-	 */
-	public List<Edge<I, E>> getEdges() {
-		return this.destEdgeList;
-	}
+    /**
+     * Get the list of incoming messages
+     * 
+     * @return the list of messages
+     */
+    public List<M> getMsgList() {
+        return msgList;
+    }
 
-	@Override
-	@SuppressWarnings("unchecked")
-	public String toString() {
-		Collections.sort(destEdgeList);
-		StringBuffer edgeBuffer = new StringBuffer();
-		edgeBuffer.append("(");
-		for (Edge<I, E> edge : destEdgeList) {
-			edgeBuffer.append(edge.getDestVertexId()).append(",");
-		}
-		edgeBuffer.append(")");
-		return "Vertex(id=" + getVertexId() + ",value=" + getVertexValue()
-				+ ", edges=" + edgeBuffer + ")";
-	}
+    /**
+     * Get outgoing edge list
+     * 
+     * @return a list of outgoing edges
+     */
+    public List<Edge<I, E>> getEdges() {
+        return this.destEdgeList;
+    }
 
-	/**
-	 * Get the number of outgoing edges
-	 * 
-	 * @return the number of outging edges
-	 */
-	public int getNumOutEdges() {
-		return destEdgeList.size();
-	}
+    @Override
+    @SuppressWarnings("unchecked")
+    public String toString() {
+        Collections.sort(destEdgeList);
+        StringBuffer edgeBuffer = new StringBuffer();
+        edgeBuffer.append("(");
+        for (Edge<I, E> edge : destEdgeList) {
+            edgeBuffer.append(edge.getDestVertexId()).append(",");
+        }
+        edgeBuffer.append(")");
+        return "Vertex(id=" + getVertexId() + ",value=" + getVertexValue() + ", edges=" + edgeBuffer + ")";
+    }
 
-	/**
-	 * Pregelix internal use only
-	 * 
-	 * @param writers
-	 */
-	public void setOutputWriters(List<IFrameWriter> writers) {
-		delegate.setOutputWriters(writers);
-	}
+    /**
+     * Get the number of outgoing edges
+     * 
+     * @return the number of outging edges
+     */
+    public int getNumOutEdges() {
+        return destEdgeList.size();
+    }
 
-	/**
-	 * Pregelix internal use only
-	 * 
-	 * @param writers
-	 */
-	public void setOutputAppenders(List<FrameTupleAppender> appenders) {
-		delegate.setOutputAppenders(appenders);
-	}
+    /**
+     * Pregelix internal use only
+     * 
+     * @param writers
+     */
+    public void setOutputWriters(List<IFrameWriter> writers) {
+        delegate.setOutputWriters(writers);
+    }
 
-	/**
-	 * Pregelix internal use only
-	 * 
-	 * @param writers
-	 */
-	public void setOutputTupleBuilders(List<ArrayTupleBuilder> tbs) {
-		delegate.setOutputTupleBuilders(tbs);
-	}
+    /**
+     * Pregelix internal use only
+     * 
+     * @param writers
+     */
+    public void setOutputAppenders(List<FrameTupleAppender> appenders) {
+        delegate.setOutputAppenders(appenders);
+    }
 
-	/**
-	 * Pregelix internal use only
-	 * 
-	 * @param writers
-	 */
-	public void finishCompute() throws IOException {
-		delegate.finishCompute();
-	}
+    /**
+     * Pregelix internal use only
+     * 
+     * @param writers
+     */
+    public void setOutputTupleBuilders(List<ArrayTupleBuilder> tbs) {
+        delegate.setOutputTupleBuilders(tbs);
+    }
 
-	/**
-	 * Pregelix internal use only
-	 */
-	public boolean hasUpdate() {
-		return this.updated;
-	}
+    /**
+     * Pregelix internal use only
+     * 
+     * @param writers
+     */
+    public void finishCompute() throws IOException {
+        delegate.finishCompute();
+    }
 
-	/**
-	 * Pregelix internal use only
-	 */
-	public boolean hasMessage() {
-		return this.hasMessage;
-	}
+    /**
+     * Pregelix internal use only
+     */
+    public boolean hasUpdate() {
+        return this.updated;
+    }
 
-	/**
-	 * Pregelix internal use only
-	 */
-	public boolean createdNewLiveVertex() {
-		return this.createdNewLiveVertex;
-	}
+    /**
+     * Pregelix internal use only
+     */
+    public boolean hasMessage() {
+        return this.hasMessage;
+    }
 
-	/**
-	 * sort the edges
-	 */
-	@SuppressWarnings("unchecked")
-	public void sortEdges() {
-		updated = true;
-		Collections.sort(destEdgeList);
-	}
+    /**
+     * Pregelix internal use only
+     */
+    public boolean createdNewLiveVertex() {
+        return this.createdNewLiveVertex;
+    }
 
-	/**
-	 * Allocate a new edge from the edge pool
-	 */
-	private Edge<I, E> allocateEdge() {
-		Edge<I, E> edge;
-		if (usedEdge < edgePool.size()) {
-			edge = edgePool.get(usedEdge);
-			usedEdge++;
-		} else {
-			edge = new Edge<I, E>();
-			edgePool.add(edge);
-			usedEdge++;
-		}
-		return edge;
-	}
+    /**
+     * sort the edges
+     */
+    @SuppressWarnings("unchecked")
+    public void sortEdges() {
+        updated = true;
+        Collections.sort(destEdgeList);
+    }
 
-	/**
-	 * Allocate a new message from the message pool
-	 */
-	private M allocateMessage() {
-		M message;
-		if (usedMessage < msgPool.size()) {
-			message = msgPool.get(usedEdge);
-			usedMessage++;
-		} else {
-			message = BspUtils.<M> createMessageValue(getContext()
-					.getConfiguration());
-			msgPool.add(message);
-			usedMessage++;
-		}
-		return message;
-	}
+    /**
+     * Allocate a new edge from the edge pool
+     */
+    private Edge<I, E> allocateEdge() {
+        Edge<I, E> edge;
+        if (usedEdge < edgePool.size()) {
+            edge = edgePool.get(usedEdge);
+            usedEdge++;
+        } else {
+            edge = new Edge<I, E>();
+            edgePool.add(edge);
+            usedEdge++;
+        }
+        return edge;
+    }
 
-	/**
-	 * Set the global superstep for all the vertices (internal use)
-	 * 
-	 * @param superstep
-	 *            New superstep
-	 */
-	public static final void setSuperstep(long superstep) {
-		Vertex.superstep = superstep;
-	}
+    /**
+     * Allocate a new message from the message pool
+     */
+    private M allocateMessage() {
+        M message;
+        if (usedMessage < msgPool.size()) {
+            message = msgPool.get(usedEdge);
+            usedMessage++;
+        } else {
+            message = BspUtils.<M> createMessageValue(getContext().getConfiguration());
+            msgPool.add(message);
+            usedMessage++;
+        }
+        return message;
+    }
 
-	/**
-	 * Add an outgoing edge into the vertex
-	 * 
-	 * @param edge
-	 *            the edge to be added
-	 * @return true if the edge list changed as a result of this call
-	 */
-	public boolean addEdge(Edge<I, E> edge) {
-		edge.setConf(getContext().getConfiguration());
-		updated = true;
-		return destEdgeList.add(edge);
-	}
+    /**
+     * Set the global superstep for all the vertices (internal use)
+     * 
+     * @param superstep
+     *            New superstep
+     */
+    public static final void setSuperstep(long superstep) {
+        Vertex.superstep = superstep;
+    }
 
-	/**
-	 * remove an outgoing edge in the graph
-	 * 
-	 * @param edge
-	 *            the edge to be removed
-	 * @return true if the edge is in the edge list of the vertex
-	 */
-	public boolean removeEdge(Edge<I, E> edge) {
-		updated = true;
-		return destEdgeList.remove(edge);
-	}
+    /**
+     * Add an outgoing edge into the vertex
+     * 
+     * @param edge
+     *            the edge to be added
+     * @return true if the edge list changed as a result of this call
+     */
+    public boolean addEdge(Edge<I, E> edge) {
+        edge.setConf(getContext().getConfiguration());
+        updated = true;
+        return destEdgeList.add(edge);
+    }
 
-	/**
-	 * Add a new vertex into the graph
-	 * 
-	 * @param vertexId
-	 *            the vertex id
-	 * @param vertex
-	 *            the vertex
-	 */
-	public final void addVertex(I vertexId, Vertex vertex) {
-		createdNewLiveVertex |= !vertex.isHalted();
-		delegate.addVertex(vertexId, vertex);
-	}
+    /**
+     * remove an outgoing edge in the graph
+     * 
+     * @param edge
+     *            the edge to be removed
+     * @return true if the edge is in the edge list of the vertex
+     */
+    public boolean removeEdge(Edge<I, E> edge) {
+        updated = true;
+        return destEdgeList.remove(edge);
+    }
 
-	/**
-	 * Delete a vertex from id
-	 * 
-	 * @param vertexId
-	 *            the vertex id
-	 */
-	public final void deleteVertex(I vertexId) {
-		delegate.deleteVertex(vertexId);
-	}
+    /**
+     * Add a new vertex into the graph
+     * 
+     * @param vertexId
+     *            the vertex id
+     * @param vertex
+     *            the vertex
+     */
+    public final void addVertex(I vertexId, Vertex vertex) {
+        createdNewLiveVertex |= !vertex.isHalted();
+        delegate.addVertex(vertexId, vertex);
+    }
 
-	public void activate() {
-		if (halt)
-			this.updated = true;
-		this.halt = false;
-	}
+    /**
+     * Delete a vertex from id
+     * 
+     * @param vertexId
+     *            the vertex id
+     */
+    public final void deleteVertex(I vertexId) {
+        delegate.deleteVertex(vertexId);
+    }
 
-	/**
-	 * Allocate a vertex value from the object pool
-	 * 
-	 * @return a vertex value instance
-	 */
-	private V allocateValue() {
-		V value;
-		if (usedValue < valuePool.size()) {
-			value = valuePool.get(usedValue);
-			usedValue++;
-		} else {
-			value = BspUtils.<V> createVertexValue(getContext()
-					.getConfiguration());
-			valuePool.add(value);
-			usedValue++;
-		}
-		return value;
-	}
+    /**
+     * Allocate a vertex value from the object pool
+     * 
+     * @return a vertex value instance
+     */
+    private V allocateValue() {
+        V value;
+        if (usedValue < valuePool.size()) {
+            value = valuePool.get(usedValue);
+            usedValue++;
+        } else {
+            value = BspUtils.<V> createVertexValue(getContext().getConfiguration());
+            valuePool.add(value);
+            usedValue++;
+        }
+        return value;
+    }
 
-	/**
-	 * Get the current global superstep number
-	 * 
-	 * @return the current superstep number
-	 */
-	public static final long getSuperstep() {
-		return superstep;
-	}
+    /**
+     * Get the current global superstep number
+     * 
+     * @return the current superstep number
+     */
+    public static final long getSuperstep() {
+        return superstep;
+    }
 
-	/**
-	 * Set the total number of vertices from the last superstep.
-	 * 
-	 * @param numVertices
-	 *            Aggregate vertices in the last superstep
-	 */
-	public static final void setNumVertices(long numVertices) {
-		Vertex.numVertices = numVertices;
-	}
+    /**
+     * Set the total number of vertices from the last superstep.
+     * 
+     * @param numVertices
+     *            Aggregate vertices in the last superstep
+     */
+    public static final void setNumVertices(long numVertices) {
+        Vertex.numVertices = numVertices;
+    }
 
-	/**
-	 * Get the number of vertexes in the graph
-	 * 
-	 * @return the number of vertexes in the graph
-	 */
-	public static final long getNumVertices() {
-		return numVertices;
-	}
+    /**
+     * Get the number of vertexes in the graph
+     * 
+     * @return the number of vertexes in the graph
+     */
+    public static final long getNumVertices() {
+        return numVertices;
+    }
 
-	/**
-	 * Set the total number of edges from the last superstep.
-	 * 
-	 * @param numEdges
-	 *            Aggregate edges in the last superstep
-	 */
-	public static void setNumEdges(long numEdges) {
-		Vertex.numEdges = numEdges;
-	}
+    /**
+     * Set the total number of edges from the last superstep.
+     * 
+     * @param numEdges
+     *            Aggregate edges in the last superstep
+     */
+    public static void setNumEdges(long numEdges) {
+        Vertex.numEdges = numEdges;
+    }
 
-	/**
-	 * Get the number of edges from this graph
-	 * 
-	 * @return the number of edges in the graph
-	 */
-	public static final long getNumEdges() {
-		return numEdges;
-	}
+    /**
+     * Get the number of edges from this graph
+     * 
+     * @return the number of edges in the graph
+     */
+    public static final long getNumEdges() {
+        return numEdges;
+    }
 
-	/**
-	 * Pregelix internal use only
-	 */
-	public static final TaskAttemptContext getContext() {
-		return context;
-	}
+    /**
+     * Pregelix internal use only
+     */
+    public static final TaskAttemptContext getContext() {
+        return context;
+    }
 
-	/**
-	 * Pregelix internal use only
-	 * 
-	 * @param context
-	 */
-	public static final void setContext(TaskAttemptContext context) {
-		Vertex.context = context;
-	}
+    /**
+     * Pregelix internal use only
+     * 
+     * @param context
+     */
+    public static final void setContext(TaskAttemptContext context) {
+        Vertex.context = context;
+    }
 
 }
diff --git a/pregelix/pregelix-core/pom.xml b/pregelix/pregelix-core/pom.xml
index 576758b..39fc396 100644
--- a/pregelix/pregelix-core/pom.xml
+++ b/pregelix/pregelix-core/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 
@@ -18,8 +18,9 @@
 	<build>
 		<plugins>
 			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-jar-plugin</artifactId>
-				<version>2.4</version>
+				<version>2.3.2</version>
 				<executions>
 					<execution>
 						<id>balancer</id>
@@ -72,7 +73,7 @@
 			<plugin>
 				<groupId>org.codehaus.mojo</groupId>
 				<artifactId>appassembler-maven-plugin</artifactId>
-				<version>1.3</version>
+                <version>1.3</version>
 				<executions>
 					<execution>
 						<configuration>
@@ -164,7 +165,7 @@
 			</plugin>
 			<plugin>
 				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
+                <version>2.4.1</version>
 				<configuration>
 					<filesets>
 						<fileset>
@@ -194,84 +195,84 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-api</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow-std</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-runtime</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-common</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-btree</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -285,7 +286,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks.examples</groupId>
 			<artifactId>hyracks-integration-tests</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
@@ -305,7 +306,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-ipc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java
index 3a4c41b..a309529 100644
--- a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java
+++ b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java
@@ -22,9 +22,6 @@
 import java.util.ArrayList;
 import java.util.EnumSet;
 import java.util.List;
-import java.util.Set;
-import java.util.TreeSet;
-import java.util.UUID;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
@@ -33,6 +30,7 @@
 
 import edu.uci.ics.hyracks.api.client.HyracksConnection;
 import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
+import edu.uci.ics.hyracks.api.deployment.DeploymentId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
@@ -45,7 +43,6 @@
 import edu.uci.ics.pregelix.core.jobgen.JobGenOuterJoinSingleSort;
 import edu.uci.ics.pregelix.core.jobgen.JobGenOuterJoinSort;
 import edu.uci.ics.pregelix.core.jobgen.clusterconfig.ClusterConfig;
-import edu.uci.ics.pregelix.core.util.Utilities;
 import edu.uci.ics.pregelix.dataflow.util.IterationUtils;
 
 @SuppressWarnings("rawtypes")
@@ -54,9 +51,7 @@
     private JobGen jobGen;
     private boolean profiling;
 
-    private String applicationName;
     private IHyracksClientConnection hcc;
-
     private Class exampleClass;
 
     public Driver(Class exampleClass) {
@@ -71,7 +66,7 @@
     @Override
     public void runJob(PregelixJob job, Plan planChoice, String ipAddress, int port, boolean profiling)
             throws HyracksException {
-        applicationName = exampleClass.getSimpleName() + UUID.randomUUID();
+        DeploymentId deploymentId = null;
         try {
             /** add hadoop configurations */
             URL hadoopCore = job.getClass().getClassLoader().getResource("core-site.xml");
@@ -121,13 +116,13 @@
             for (URL url : urls)
                 if (url.toString().endsWith(".jar"))
                     jars.add(new File(url.getPath()));
-            installApplication(jars);
+            deploymentId = installApplication(jars);
 
             start = System.currentTimeMillis();
             FileSystem dfs = FileSystem.get(job.getConfiguration());
             dfs.delete(FileOutputFormat.getOutputPath(job), true);
-            runCreate(jobGen);
-            runDataLoad(jobGen);
+            runCreate(deploymentId, jobGen);
+            runDataLoad(deploymentId, jobGen);
             end = System.currentTimeMillis();
             time = end - start;
             LOG.info("data loading finished " + time + "ms");
@@ -135,7 +130,7 @@
             boolean terminate = false;
             do {
                 start = System.currentTimeMillis();
-                runLoopBodyIteration(jobGen, i);
+                runLoopBodyIteration(deploymentId, jobGen, i);
                 end = System.currentTimeMillis();
                 time = end - start;
                 LOG.info("iteration " + i + " finished " + time + "ms");
@@ -145,20 +140,20 @@
             } while (!terminate);
 
             start = System.currentTimeMillis();
-            runHDFSWRite(jobGen);
-            runCleanup(jobGen);
-            destroyApplication(applicationName);
+            runHDFSWRite(deploymentId, jobGen);
+            runCleanup(deploymentId, jobGen);
             end = System.currentTimeMillis();
             time = end - start;
             LOG.info("result writing finished " + time + "ms");
+            hcc.unDeployBinary(deploymentId);
             LOG.info("job finished");
         } catch (Exception e) {
             try {
                 /**
                  * destroy application if there is any exception
                  */
-                if (hcc != null) {
-                    destroyApplication(applicationName);
+                if (hcc != null && deploymentId == null) {
+                    hcc.unDeployBinary(deploymentId);
                 }
             } catch (Exception e2) {
                 throw new HyracksException(e2);
@@ -167,84 +162,75 @@
         }
     }
 
-    private void runCreate(JobGen jobGen) throws Exception {
+    private void runCreate(DeploymentId deploymentId, JobGen jobGen) throws Exception {
         try {
             JobSpecification treeCreateSpec = jobGen.generateCreatingJob();
-            execute(treeCreateSpec);
+            execute(deploymentId, treeCreateSpec);
         } catch (Exception e) {
             throw e;
         }
     }
 
-    private void runDataLoad(JobGen jobGen) throws Exception {
+    private void runDataLoad(DeploymentId deploymentId, JobGen jobGen) throws Exception {
         try {
             JobSpecification bulkLoadJobSpec = jobGen.generateLoadingJob();
-            execute(bulkLoadJobSpec);
+            execute(deploymentId, bulkLoadJobSpec);
         } catch (Exception e) {
             throw e;
         }
     }
 
-    private void runLoopBodyIteration(JobGen jobGen, int iteration) throws Exception {
+    private void runLoopBodyIteration(DeploymentId deploymentId, JobGen jobGen, int iteration) throws Exception {
         try {
             JobSpecification loopBody = jobGen.generateJob(iteration);
-            execute(loopBody);
+            execute(deploymentId, loopBody);
         } catch (Exception e) {
             throw e;
         }
     }
 
-    private void runHDFSWRite(JobGen jobGen) throws Exception {
+    private void runHDFSWRite(DeploymentId deploymentId, JobGen jobGen) throws Exception {
         try {
             JobSpecification scanSortPrintJobSpec = jobGen.scanIndexWriteGraph();
-            execute(scanSortPrintJobSpec);
+            execute(deploymentId, scanSortPrintJobSpec);
         } catch (Exception e) {
             throw e;
         }
     }
 
-    private void runCleanup(JobGen jobGen) throws Exception {
+    private void runCleanup(DeploymentId deploymentId, JobGen jobGen) throws Exception {
         try {
             JobSpecification[] cleanups = jobGen.generateCleanup();
-            runJobArray(cleanups);
+            runJobArray(deploymentId, cleanups);
         } catch (Exception e) {
             throw e;
         }
     }
 
-    private void runJobArray(JobSpecification[] jobs) throws Exception {
+    private void runJobArray(DeploymentId deploymentId, JobSpecification[] jobs) throws Exception {
         for (JobSpecification job : jobs) {
-            execute(job);
+            execute(deploymentId, job);
         }
     }
 
-    private void execute(JobSpecification job) throws Exception {
+    private void execute(DeploymentId deploymentId, JobSpecification job) throws Exception {
         job.setUseConnectorPolicyForScheduling(false);
-        JobId jobId = hcc.startJob(applicationName, job,
+        JobId jobId = hcc.startJob(deploymentId, job,
                 profiling ? EnumSet.of(JobFlag.PROFILE_RUNTIME) : EnumSet.noneOf(JobFlag.class));
         hcc.waitForCompletion(jobId);
     }
 
-    public void installApplication(List<File> jars) throws Exception {
-        Set<String> allJars = new TreeSet<String>();
+    public DeploymentId installApplication(List<File> jars) throws Exception {
+        List<String> allJars = new ArrayList<String>();
         for (File jar : jars) {
             allJars.add(jar.getAbsolutePath());
         }
         long start = System.currentTimeMillis();
-        File appZip = Utilities.getHyracksArchive(applicationName, allJars);
+        DeploymentId deploymentId = hcc.deployBinary(allJars);
         long end = System.currentTimeMillis();
-        LOG.info("jar packing finished " + (end - start) + "ms");
-
-        start = System.currentTimeMillis();
-        hcc.createApplication(applicationName, appZip);
-        end = System.currentTimeMillis();
         LOG.info("jar deployment finished " + (end - start) + "ms");
+        return deploymentId;
     }
-
-    public void destroyApplication(String appName) throws Exception {
-        hcc.destroyApplication(appName);
-    }
-
 }
 
 class FileFilter implements FilenameFilter {
diff --git a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/hadoop/config/ConfigurationFactory.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/hadoop/config/ConfigurationFactory.java
index f3089ba..d225eb4 100644
--- a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/hadoop/config/ConfigurationFactory.java
+++ b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/hadoop/config/ConfigurationFactory.java
@@ -17,6 +17,7 @@
 
 import org.apache.hadoop.conf.Configuration;
 
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.pregelix.api.util.SerDeUtils;
 import edu.uci.ics.pregelix.dataflow.base.IConfigurationFactory;
@@ -34,11 +35,11 @@
     }
 
     @Override
-    public Configuration createConfiguration() throws HyracksDataException {
+    public Configuration createConfiguration(IHyracksTaskContext ctx) throws HyracksDataException {
         try {
             Configuration conf = new Configuration();
+            conf.setClassLoader(ctx.getJobletContext().getClassLoader());
             SerDeUtils.deserialize(conf, data);
-            conf.setClassLoader(this.getClass().getClassLoader());
             return conf;
         } catch (Exception e) {
             throw new HyracksDataException(e);
diff --git a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGen.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGen.java
index 0b1be61..ce1a34d 100644
--- a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGen.java
+++ b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGen.java
@@ -52,13 +52,13 @@
 import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDropOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDropOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.TransientLocalResourceFactoryProvider;
 import edu.uci.ics.pregelix.api.graph.GlobalAggregator;
 import edu.uci.ics.pregelix.api.graph.MessageCombiner;
 import edu.uci.ics.pregelix.api.graph.Vertex;
@@ -73,17 +73,17 @@
 import edu.uci.ics.pregelix.core.jobgen.provider.NormalizedKeyComputerFactoryProvider;
 import edu.uci.ics.pregelix.core.runtime.touchpoint.WritableComparingBinaryComparatorFactory;
 import edu.uci.ics.pregelix.core.util.DataflowUtils;
-import edu.uci.ics.pregelix.core.util.DatatypeHelper;
 import edu.uci.ics.pregelix.dataflow.HDFSFileWriteOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.VertexFileScanOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.VertexWriteOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.base.IConfigurationFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IRecordDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IRuntimeHookFactory;
+import edu.uci.ics.pregelix.runtime.bootstrap.IndexLifeCycleManagerProvider;
 import edu.uci.ics.pregelix.runtime.bootstrap.StorageManagerInterface;
-import edu.uci.ics.pregelix.runtime.bootstrap.TreeIndexRegistryProvider;
 import edu.uci.ics.pregelix.runtime.touchpoint.RuntimeHookFactory;
 import edu.uci.ics.pregelix.runtime.touchpoint.VertexIdPartitionComputerFactory;
+import edu.uci.ics.pregelix.runtime.touchpoint.WritableSerializerDeserializerFactory;
 
 public abstract class JobGen implements IJobGen {
     private static final Logger LOGGER = Logger.getLogger(JobGen.class.getName());
@@ -93,7 +93,7 @@
     protected static final String PRIMARY_INDEX = "primary";
     protected final Configuration conf;
     protected final PregelixJob giraphJob;
-    protected IIndexRegistryProvider<IIndex> treeRegistryProvider = TreeIndexRegistryProvider.INSTANCE;
+    protected IIndexLifecycleManagerProvider lcManagerProvider = IndexLifeCycleManagerProvider.INSTANCE;
     protected IStorageManagerInterface storageManagerInterface = StorageManagerInterface.INSTANCE;
     protected String jobId = new UUID(System.currentTimeMillis(), System.nanoTime()).toString();
     protected int frameSize = ClusterConfig.getFrameSize();
@@ -169,8 +169,9 @@
 
         IFileSplitProvider fileSplitProvider = ClusterConfig.getFileSplitProvider(jobId, PRIMARY_INDEX);
         TreeIndexCreateOperatorDescriptor btreeCreate = new TreeIndexCreateOperatorDescriptor(spec,
-                storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits, comparatorFactories,
-                new BTreeDataflowHelperFactory(), NoOpOperationCallbackProvider.INSTANCE);
+                storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories, null,
+                new BTreeDataflowHelperFactory(), new TransientLocalResourceFactoryProvider(),
+                NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, btreeCreate);
         return spec;
     }
@@ -229,16 +230,16 @@
         typeTraits[0] = new TypeTraits(false);
         typeTraits[1] = new TypeTraits(false);
         TreeIndexBulkLoadOperatorDescriptor btreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits, comparatorFactories,
-                fieldPermutation, DEFAULT_BTREE_FILL_FACTOR, new BTreeDataflowHelperFactory(),
-                NoOpOperationCallbackProvider.INSTANCE);
+                storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories, null,
+                fieldPermutation, DEFAULT_BTREE_FILL_FACTOR, false, 0, new BTreeDataflowHelperFactory(),
+                NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, btreeBulkLoad);
 
         /**
          * connect operator descriptors
          */
         ITuplePartitionComputerFactory hashPartitionComputerFactory = new VertexIdPartitionComputerFactory(
-                DatatypeHelper.createSerializerDeserializer(vertexIdClass));
+                new WritableSerializerDeserializerFactory(vertexIdClass));
         spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), scanner, 0, sorter, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), sorter, 0, btreeBulkLoad, 0);
         return spec;
@@ -314,7 +315,7 @@
          * connect operator descriptors
          */
         ITuplePartitionComputerFactory hashPartitionComputerFactory = new VertexIdPartitionComputerFactory(
-                DatatypeHelper.createSerializerDeserializer(vertexIdClass));
+                new WritableSerializerDeserializerFactory(vertexIdClass));
         spec.connect(new OneToOneConnectorDescriptor(spec), scanner, 0, sorter, 0);
         spec.connect(new MToNPartitioningMergingConnectorDescriptor(spec, hashPartitionComputerFactory, sortFields,
                 comparatorFactories), sorter, 0, writer, 0);
@@ -356,8 +357,8 @@
         typeTraits[0] = new TypeTraits(false);
         typeTraits[1] = new TypeTraits(false);
         BTreeSearchOperatorDescriptor scanner = new BTreeSearchOperatorDescriptor(spec, recordDescriptor,
-                storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits, comparatorFactories,
-                null, null, true, true, new BTreeDataflowHelperFactory(), false, NoOpOperationCallbackProvider.INSTANCE);
+                storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories, null,
+                null, null, true, true, new BTreeDataflowHelperFactory(), false, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, scanner);
 
         /**
@@ -381,7 +382,7 @@
         int[] sortFields = new int[1];
         sortFields[0] = 0;
         ITuplePartitionComputerFactory hashPartitionComputerFactory = new VertexIdPartitionComputerFactory(
-                DatatypeHelper.createSerializerDeserializer(vertexIdClass));
+                new WritableSerializerDeserializerFactory(vertexIdClass));
         spec.connect(new OneToOneConnectorDescriptor(spec), emptyTupleSource, 0, scanner, 0);
         spec.connect(new MToNPartitioningMergingConnectorDescriptor(spec, hashPartitionComputerFactory, sortFields,
                 comparatorFactories), scanner, 0, writer, 0);
@@ -424,9 +425,10 @@
         ITypeTraits[] typeTraits = new ITypeTraits[2];
         typeTraits[0] = new TypeTraits(false);
         typeTraits[1] = new TypeTraits(false);
+
         BTreeSearchOperatorDescriptor scanner = new BTreeSearchOperatorDescriptor(spec, recordDescriptor,
-                storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits, comparatorFactories,
-                null, null, true, true, new BTreeDataflowHelperFactory(), false, NoOpOperationCallbackProvider.INSTANCE);
+                storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories, null,
+                null, null, true, true, new BTreeDataflowHelperFactory(), false, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, scanner);
 
         /**
@@ -455,8 +457,8 @@
         JobSpecification spec = new JobSpecification();
 
         IFileSplitProvider fileSplitProvider = ClusterConfig.getFileSplitProvider(jobId, indexName);
-        TreeIndexDropOperatorDescriptor drop = new TreeIndexDropOperatorDescriptor(spec, storageManagerInterface,
-                treeRegistryProvider, fileSplitProvider);
+        IndexDropOperatorDescriptor drop = new IndexDropOperatorDescriptor(spec, storageManagerInterface,
+                lcManagerProvider, fileSplitProvider, new BTreeDataflowHelperFactory());
 
         ClusterConfig.setLocationConstraint(spec, drop);
         spec.addRoot(drop);
diff --git a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenInnerJoin.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenInnerJoin.java
index 9de4c04..ff2f6a0 100644
--- a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenInnerJoin.java
+++ b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenInnerJoin.java
@@ -40,8 +40,8 @@
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMLeafFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexInsertUpdateDeleteOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOp;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
 import edu.uci.ics.pregelix.api.graph.MsgList;
 import edu.uci.ics.pregelix.api.job.PregelixJob;
@@ -73,6 +73,7 @@
 import edu.uci.ics.pregelix.runtime.touchpoint.PreSuperStepRuntimeHookFactory;
 import edu.uci.ics.pregelix.runtime.touchpoint.RuntimeHookFactory;
 import edu.uci.ics.pregelix.runtime.touchpoint.VertexIdPartitionComputerFactory;
+import edu.uci.ics.pregelix.runtime.touchpoint.WritableSerializerDeserializerFactory;
 
 public class JobGenInnerJoin extends JobGen {
 
@@ -135,7 +136,7 @@
         RecordDescriptor rdDelete = DataflowUtils.getRecordDescriptorFromWritableClasses(vertexIdClass.getName());
 
         BTreeSearchFunctionUpdateOperatorDescriptor scanner = new BTreeSearchFunctionUpdateOperatorDescriptor(spec,
-                recordDescriptor, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
+                recordDescriptor, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, JobGenUtil.getForwardScan(iteration), null, null, true, true,
                 new BTreeDataflowHelperFactory(), inputRdFactory, 6,
                 new StartComputeUpdateFunctionFactory(confFactory), preHookFactory, null, rdUnnestedMessage, rdDummy,
@@ -166,8 +167,8 @@
         indexCmpFactories[0] = JobGenUtil.getIBinaryComparatorFactory(iteration + 1,
                 WritableComparator.get(vertexIdClass).getClass());
         TreeIndexBulkReLoadOperatorDescriptor btreeBulkLoad = new TreeIndexBulkReLoadOperatorDescriptor(spec,
-                storageManagerInterface, treeRegistryProvider, secondaryFileSplitProvider, typeTraits,
-                indexCmpFactories, fieldPermutation, DEFAULT_BTREE_FILL_FACTOR, new BTreeDataflowHelperFactory());
+                storageManagerInterface, lcManagerProvider, secondaryFileSplitProvider, typeTraits, indexCmpFactories,
+                fieldPermutation, DEFAULT_BTREE_FILL_FACTOR, new BTreeDataflowHelperFactory());
         ClusterConfig.setLocationConstraint(spec, btreeBulkLoad);
 
         /**
@@ -222,18 +223,18 @@
          * add the insert operator to insert vertexes
          */
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdInsert, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.INSERT, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
         /**
          * add the delete operator to delete vertexes
          */
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdDelete, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.DELETE, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.DELETE, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -245,7 +246,7 @@
         ClusterConfig.setLocationConstraint(spec, emptySink4);
 
         ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                rdUnnestedMessage.getFields()[0]);
+                new WritableSerializerDeserializerFactory(vertexIdClass));
         ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
 
         /** connect all operators **/
@@ -343,7 +344,7 @@
         ITreeIndexFrameFactory leafFrameFactory = new BTreeNSMLeafFrameFactory(new TypeAwareTupleWriterFactory(
                 typeTraits));
         IndexNestedLoopJoinOperatorDescriptor setUnion = new IndexNestedLoopJoinOperatorDescriptor(spec, rdFinal,
-                storageManagerInterface, treeRegistryProvider, secondaryFileSplitProviderRead, interiorFrameFactory,
+                storageManagerInterface, lcManagerProvider, secondaryFileSplitProviderRead, interiorFrameFactory,
                 leafFrameFactory, typeTraits, comparatorFactories, true, keyFields, keyFields, true, true,
                 new BTreeDataflowHelperFactory(), true);
         ClusterConfig.setLocationConstraint(spec, setUnion);
@@ -361,8 +362,8 @@
                 vertexIdClass.getName(), MsgList.class.getName(), vertexIdClass.getName(), vertexClass.getName());
 
         IndexNestedLoopJoinFunctionUpdateOperatorDescriptor join = new IndexNestedLoopJoinFunctionUpdateOperatorDescriptor(
-                spec, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, JobGenUtil.getForwardScan(iteration), keyFields, keyFields, true, true,
+                spec, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories,
+                JobGenUtil.getForwardScan(iteration), keyFields, keyFields, true, true,
                 new BTreeDataflowHelperFactory(), inputRdFactory, 6, new ComputeUpdateFunctionFactory(confFactory),
                 preHookFactory, null, rdUnnestedMessage, rdDummy, rdPartialAggregate, rdInsert, rdDelete, rdFinal);
         ClusterConfig.setLocationConstraint(spec, join);
@@ -377,7 +378,7 @@
         String writeFile = iteration % 2 == 0 ? SECONDARY_INDEX_EVEN : SECONDARY_INDEX_ODD;
         IFileSplitProvider secondaryFileSplitProviderWrite = ClusterConfig.getFileSplitProvider(jobId, writeFile);
         TreeIndexBulkReLoadOperatorDescriptor btreeBulkLoad = new TreeIndexBulkReLoadOperatorDescriptor(spec,
-                storageManagerInterface, treeRegistryProvider, secondaryFileSplitProviderWrite, typeTraits,
+                storageManagerInterface, lcManagerProvider, secondaryFileSplitProviderWrite, typeTraits,
                 indexCmpFactories, fieldPermutation, DEFAULT_BTREE_FILL_FACTOR, new BTreeDataflowHelperFactory());
         ClusterConfig.setLocationConstraint(spec, btreeBulkLoad);
 
@@ -446,18 +447,18 @@
          * add the insert operator to insert vertexes
          */
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdInsert, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.INSERT, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
         /**
          * add the delete operator to delete vertexes
          */
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdDelete, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.DELETE, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.DELETE, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -470,7 +471,7 @@
 
         ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
         ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                rdUnnestedMessage.getFields()[0]);
+                new WritableSerializerDeserializerFactory(vertexIdClass));
         /** connect all operators **/
         spec.connect(new OneToOneConnectorDescriptor(spec), emptyTupleSource, 0, preSuperStep, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), preSuperStep, 0, materializeRead, 0);
diff --git a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoin.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoin.java
index 91c15b2..ee385f1 100644
--- a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoin.java
+++ b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoin.java
@@ -40,8 +40,8 @@
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMLeafFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexInsertUpdateDeleteOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOp;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
 import edu.uci.ics.pregelix.api.graph.MsgList;
 import edu.uci.ics.pregelix.api.job.PregelixJob;
@@ -73,6 +73,7 @@
 import edu.uci.ics.pregelix.runtime.touchpoint.RuntimeHookFactory;
 import edu.uci.ics.pregelix.runtime.touchpoint.VertexIdNullWriterFactory;
 import edu.uci.ics.pregelix.runtime.touchpoint.VertexIdPartitionComputerFactory;
+import edu.uci.ics.pregelix.runtime.touchpoint.WritableSerializerDeserializerFactory;
 
 public class JobGenOuterJoin extends JobGen {
 
@@ -129,7 +130,7 @@
         RecordDescriptor rdDelete = DataflowUtils.getRecordDescriptorFromWritableClasses(vertexIdClass.getName());
 
         BTreeSearchFunctionUpdateOperatorDescriptor scanner = new BTreeSearchFunctionUpdateOperatorDescriptor(spec,
-                recordDescriptor, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
+                recordDescriptor, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, JobGenUtil.getForwardScan(iteration), null, null, true, true,
                 new BTreeDataflowHelperFactory(), inputRdFactory, 5,
                 new StartComputeUpdateFunctionFactory(confFactory), preHookFactory, null, rdUnnestedMessage, rdDummy,
@@ -205,30 +206,29 @@
          */
         int[] fieldPermutation = new int[] { 0, 1 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdInsert, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.INSERT, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
         /**
          * add the delete operator to delete vertexes
          */
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdDelete, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.DELETE, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.DELETE, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
         EmptySinkOperatorDescriptor emptySink3 = new EmptySinkOperatorDescriptor(spec);
-        ClusterConfig.setLocationConstraint(spec, emptySink3);
 
         /** construct empty sink operator */
         EmptySinkOperatorDescriptor emptySink4 = new EmptySinkOperatorDescriptor(spec);
         ClusterConfig.setLocationConstraint(spec, emptySink4);
 
         ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                rdUnnestedMessage.getFields()[0]);
+                new WritableSerializerDeserializerFactory(vertexIdClass));
         /** connect all operators **/
         spec.connect(new OneToOneConnectorDescriptor(spec), emptyTupleSource, 0, preSuperStep, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), preSuperStep, 0, scanner, 0);
@@ -335,7 +335,7 @@
                 vertexIdClass.getName(), MsgList.class.getName(), vertexIdClass.getName(), vertexClass.getName());
 
         IndexNestedLoopJoinFunctionUpdateOperatorDescriptor join = new IndexNestedLoopJoinFunctionUpdateOperatorDescriptor(
-                spec, storageManagerInterface, treeRegistryProvider, fileSplitProvider, interiorFrameFactory,
+                spec, storageManagerInterface, lcManagerProvider, fileSplitProvider, interiorFrameFactory,
                 leafFrameFactory, typeTraits, comparatorFactories, JobGenUtil.getForwardScan(iteration), keyFields,
                 keyFields, true, true, new BTreeDataflowHelperFactory(), true, nullWriterFactories, inputRdFactory, 5,
                 new ComputeUpdateFunctionFactory(confFactory), preHookFactory, null, rdUnnestedMessage, rdDummy,
@@ -408,18 +408,18 @@
          */
         int[] fieldPermutation = new int[] { 0, 1 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdInsert, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.INSERT, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
         /**
          * add the delete operator to delete vertexes
          */
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdDelete, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.DELETE, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.DELETE, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -432,7 +432,7 @@
 
         ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
         ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                rdUnnestedMessage.getFields()[0]);
+                new WritableSerializerDeserializerFactory(vertexIdClass));
 
         /** connect all operators **/
         spec.connect(new OneToOneConnectorDescriptor(spec), emptyTupleSource, 0, preSuperStep, 0);
diff --git a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSingleSort.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSingleSort.java
index ee1fd0f..40b5f45 100644
--- a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSingleSort.java
+++ b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSingleSort.java
@@ -39,8 +39,8 @@
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMLeafFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexInsertUpdateDeleteOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOp;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
 import edu.uci.ics.pregelix.api.graph.MsgList;
 import edu.uci.ics.pregelix.api.job.PregelixJob;
@@ -72,6 +72,7 @@
 import edu.uci.ics.pregelix.runtime.touchpoint.RuntimeHookFactory;
 import edu.uci.ics.pregelix.runtime.touchpoint.VertexIdNullWriterFactory;
 import edu.uci.ics.pregelix.runtime.touchpoint.VertexIdPartitionComputerFactory;
+import edu.uci.ics.pregelix.runtime.touchpoint.WritableSerializerDeserializerFactory;
 
 public class JobGenOuterJoinSingleSort extends JobGen {
 
@@ -131,7 +132,7 @@
         RecordDescriptor rdDelete = DataflowUtils.getRecordDescriptorFromWritableClasses(vertexIdClass.getName());
 
         BTreeSearchFunctionUpdateOperatorDescriptor scanner = new BTreeSearchFunctionUpdateOperatorDescriptor(spec,
-                recordDescriptor, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
+                recordDescriptor, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, JobGenUtil.getForwardScan(iteration), null, null, true, true,
                 new BTreeDataflowHelperFactory(), inputRdFactory, 5,
                 new StartComputeUpdateFunctionFactory(confFactory), preHookFactory, null, rdUnnestedMessage, rdDummy,
@@ -197,18 +198,18 @@
          */
         int[] fieldPermutation = new int[] { 0, 1 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdInsert, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.INSERT, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
         /**
          * add the delete operator to delete vertexes
          */
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdDelete, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.DELETE, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.DELETE, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -221,7 +222,7 @@
 
         ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
         ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                rdUnnestedMessage.getFields()[0]);
+                new WritableSerializerDeserializerFactory(vertexIdClass));
         /** connect all operators **/
         spec.connect(new OneToOneConnectorDescriptor(spec), emptyTupleSource, 0, preSuperStep, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), preSuperStep, 0, scanner, 0);
@@ -323,7 +324,7 @@
                 vertexIdClass.getName(), MsgList.class.getName(), vertexIdClass.getName(), vertexClass.getName());
 
         IndexNestedLoopJoinFunctionUpdateOperatorDescriptor join = new IndexNestedLoopJoinFunctionUpdateOperatorDescriptor(
-                spec, storageManagerInterface, treeRegistryProvider, fileSplitProvider, interiorFrameFactory,
+                spec, storageManagerInterface, lcManagerProvider, fileSplitProvider, interiorFrameFactory,
                 leafFrameFactory, typeTraits, comparatorFactories, JobGenUtil.getForwardScan(iteration), keyFields,
                 keyFields, true, true, new BTreeDataflowHelperFactory(), true, nullWriterFactories, inputRdFactory, 5,
                 new ComputeUpdateFunctionFactory(confFactory), preHookFactory, null, rdUnnestedMessage, rdDummy,
@@ -384,18 +385,18 @@
 
         int[] fieldPermutation = new int[] { 0, 1 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdInsert, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.INSERT, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
         /**
          * add the delete operator to delete vertexes
          */
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdDelete, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.DELETE, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.DELETE, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -408,7 +409,7 @@
 
         ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
         ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                rdUnnestedMessage.getFields()[0]);
+                new WritableSerializerDeserializerFactory(vertexIdClass));
 
         /** connect all operators **/
         spec.connect(new OneToOneConnectorDescriptor(spec), emptyTupleSource, 0, preSuperStep, 0);
diff --git a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSort.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSort.java
index 628e9ce..3351a2c 100644
--- a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSort.java
+++ b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSort.java
@@ -39,8 +39,8 @@
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMLeafFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexInsertUpdateDeleteOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
-import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOp;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
 import edu.uci.ics.pregelix.api.graph.MsgList;
 import edu.uci.ics.pregelix.api.job.PregelixJob;
@@ -72,6 +72,7 @@
 import edu.uci.ics.pregelix.runtime.touchpoint.RuntimeHookFactory;
 import edu.uci.ics.pregelix.runtime.touchpoint.VertexIdNullWriterFactory;
 import edu.uci.ics.pregelix.runtime.touchpoint.VertexIdPartitionComputerFactory;
+import edu.uci.ics.pregelix.runtime.touchpoint.WritableSerializerDeserializerFactory;
 
 public class JobGenOuterJoinSort extends JobGen {
 
@@ -128,7 +129,7 @@
         RecordDescriptor rdDelete = DataflowUtils.getRecordDescriptorFromWritableClasses(vertexIdClass.getName());
 
         BTreeSearchFunctionUpdateOperatorDescriptor scanner = new BTreeSearchFunctionUpdateOperatorDescriptor(spec,
-                recordDescriptor, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
+                recordDescriptor, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, JobGenUtil.getForwardScan(iteration), null, null, true, true,
                 new BTreeDataflowHelperFactory(), inputRdFactory, 5,
                 new StartComputeUpdateFunctionFactory(confFactory), preHookFactory, null, rdUnnestedMessage, rdDummy,
@@ -211,18 +212,18 @@
          */
         int[] fieldPermutation = new int[] { 0, 1 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdInsert, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.INSERT, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
         /**
          * add the delete operator to delete vertexes
          */
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdDelete, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.DELETE, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.DELETE, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -234,7 +235,7 @@
         ClusterConfig.setLocationConstraint(spec, emptySink4);
 
         ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                rdUnnestedMessage.getFields()[0]);
+                new WritableSerializerDeserializerFactory(vertexIdClass));
         /** connect all operators **/
         spec.connect(new OneToOneConnectorDescriptor(spec), emptyTupleSource, 0, preSuperStep, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), preSuperStep, 0, scanner, 0);
@@ -337,7 +338,7 @@
                 vertexIdClass.getName(), MsgList.class.getName(), vertexIdClass.getName(), vertexClass.getName());
 
         IndexNestedLoopJoinFunctionUpdateOperatorDescriptor join = new IndexNestedLoopJoinFunctionUpdateOperatorDescriptor(
-                spec, storageManagerInterface, treeRegistryProvider, fileSplitProvider, interiorFrameFactory,
+                spec, storageManagerInterface, lcManagerProvider, fileSplitProvider, interiorFrameFactory,
                 leafFrameFactory, typeTraits, comparatorFactories, JobGenUtil.getForwardScan(iteration), keyFields,
                 keyFields, true, true, new BTreeDataflowHelperFactory(), true, nullWriterFactories, inputRdFactory, 5,
                 new ComputeUpdateFunctionFactory(confFactory), preHookFactory, null, rdUnnestedMessage, rdDummy,
@@ -417,18 +418,18 @@
          */
         int[] fieldPermutation = new int[] { 0, 1 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdInsert, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.INSERT, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
         /**
          * add the delete operator to delete vertexes
          */
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
-                spec, rdDelete, storageManagerInterface, treeRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, fieldPermutation, IndexOp.DELETE, new BTreeDataflowHelperFactory(), null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, fieldPermutation, IndexOperation.DELETE, new BTreeDataflowHelperFactory(),
+                null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -441,7 +442,7 @@
 
         ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
         ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                rdUnnestedMessage.getFields()[0]);
+                new WritableSerializerDeserializerFactory(vertexIdClass));
 
         /** connect all operators **/
         spec.connect(new OneToOneConnectorDescriptor(spec), emptyTupleSource, 0, preSuperStep, 0);
diff --git a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/runtime/touchpoint/WritableRecordDescriptorFactory.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/runtime/touchpoint/WritableRecordDescriptorFactory.java
index d1d927d..145169e 100644
--- a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/runtime/touchpoint/WritableRecordDescriptorFactory.java
+++ b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/runtime/touchpoint/WritableRecordDescriptorFactory.java
@@ -14,6 +14,7 @@
  */
 package edu.uci.ics.pregelix.core.runtime.touchpoint;
 
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
@@ -29,9 +30,9 @@
     }
 
     @Override
-    public RecordDescriptor createRecordDescriptor() throws HyracksDataException {
+    public RecordDescriptor createRecordDescriptor(IHyracksTaskContext ctx) throws HyracksDataException {
         try {
-            return DataflowUtils.getRecordDescriptorFromWritableClasses(fieldClasses);
+            return DataflowUtils.getRecordDescriptorFromWritableClasses(ctx, fieldClasses);
         } catch (HyracksException e) {
             throw new HyracksDataException(e);
         }
diff --git a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/DataflowUtils.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/DataflowUtils.java
index bcf3ffc..e9132c4 100644
--- a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/DataflowUtils.java
+++ b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/DataflowUtils.java
@@ -17,6 +17,7 @@
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.io.Writable;
 
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
@@ -27,6 +28,7 @@
 import edu.uci.ics.pregelix.dataflow.std.base.IRecordDescriptorFactory;
 import edu.uci.ics.pregelix.runtime.simpleagg.AccumulatingAggregatorFactory;
 import edu.uci.ics.pregelix.runtime.simpleagg.AggregationFunctionFactory;
+import edu.uci.ics.pregelix.runtime.touchpoint.DatatypeHelper;
 
 public class DataflowUtils {
 
@@ -40,9 +42,10 @@
             throws HyracksException {
         RecordDescriptor recordDescriptor = null;
         try {
+            ClassLoader loader = DataflowUtils.class.getClassLoader();
             recordDescriptor = DatatypeHelper.createKeyValueRecordDescriptor(
-                    (Class<? extends Writable>) Class.forName(className1),
-                    (Class<? extends Writable>) Class.forName(className2));
+                    (Class<? extends Writable>) loader.loadClass(className1),
+                    (Class<? extends Writable>) loader.loadClass(className2));
         } catch (ClassNotFoundException cnfe) {
             throw new HyracksException(cnfe);
         }
@@ -53,11 +56,12 @@
     public static RecordDescriptor getRecordDescriptorFromWritableClasses(String... classNames) throws HyracksException {
         RecordDescriptor recordDescriptor = null;
         ISerializerDeserializer[] serdes = new ISerializerDeserializer[classNames.length];
+        ClassLoader loader = DataflowUtils.class.getClassLoader();
         try {
             int i = 0;
             for (String className : classNames)
-                serdes[i++] = DatatypeHelper.createSerializerDeserializer((Class<? extends Writable>) Class
-                        .forName(className));
+                serdes[i++] = DatatypeHelper.createSerializerDeserializer((Class<? extends Writable>) loader
+                        .loadClass(className));
         } catch (ClassNotFoundException cnfe) {
             throw new HyracksException(cnfe);
         }
@@ -79,4 +83,35 @@
                 new IAggregateFunctionFactory[] { aggFuncFactory });
         return aggregatorFactory;
     }
+
+    @SuppressWarnings("unchecked")
+    public static RecordDescriptor getRecordDescriptorFromKeyValueClasses(IHyracksTaskContext ctx, String className1,
+            String className2) throws HyracksException {
+        RecordDescriptor recordDescriptor = null;
+        try {
+            recordDescriptor = DatatypeHelper.createKeyValueRecordDescriptor((Class<? extends Writable>) ctx
+                    .getJobletContext().loadClass(className1), (Class<? extends Writable>) ctx.getJobletContext()
+                    .loadClass(className2));
+        } catch (Exception cnfe) {
+            throw new HyracksException(cnfe);
+        }
+        return recordDescriptor;
+    }
+
+    @SuppressWarnings({ "unchecked", "rawtypes" })
+    public static RecordDescriptor getRecordDescriptorFromWritableClasses(IHyracksTaskContext ctx, String... classNames)
+            throws HyracksException {
+        RecordDescriptor recordDescriptor = null;
+        ISerializerDeserializer[] serdes = new ISerializerDeserializer[classNames.length];
+        try {
+            int i = 0;
+            for (String className : classNames)
+                serdes[i++] = DatatypeHelper.createSerializerDeserializer((Class<? extends Writable>) ctx
+                        .getJobletContext().loadClass(className));
+        } catch (Exception cnfe) {
+            throw new HyracksException(cnfe);
+        }
+        recordDescriptor = new RecordDescriptor(serdes);
+        return recordDescriptor;
+    }
 }
diff --git a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/DatatypeHelper.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/DatatypeHelper.java
deleted file mode 100644
index ee319c6..0000000
--- a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/DatatypeHelper.java
+++ /dev/null
@@ -1,125 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.pregelix.core.util;
-
-import java.io.DataInput;
-import java.io.DataOutput;
-import java.io.IOException;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.Map.Entry;
-
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.io.NullWritable;
-import org.apache.hadoop.io.Writable;
-import org.apache.hadoop.mapred.JobConf;
-
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-
-@SuppressWarnings("deprecation")
-public class DatatypeHelper {
-    private static final class WritableSerializerDeserializer<T extends Writable> implements ISerializerDeserializer<T> {
-        private static final long serialVersionUID = 1L;
-
-        private Class<T> clazz;
-        private T object;
-
-        private WritableSerializerDeserializer(Class<T> clazz) {
-            this.clazz = clazz;
-        }
-
-        @SuppressWarnings("unchecked")
-        private T createInstance() throws HyracksDataException {
-            // TODO remove "if", create a new WritableInstanceOperations class
-            // that deals with Writables that don't have public constructors
-            if (NullWritable.class.equals(clazz)) {
-                return (T) NullWritable.get();
-            }
-            try {
-                return clazz.newInstance();
-            } catch (InstantiationException e) {
-                throw new HyracksDataException(e);
-            } catch (IllegalAccessException e) {
-                throw new HyracksDataException(e);
-            }
-        }
-
-        @Override
-        public T deserialize(DataInput in) throws HyracksDataException {
-            if (object == null) {
-                object = createInstance();
-            }
-            try {
-                object.readFields(in);
-            } catch (IOException e) {
-                e.printStackTrace();
-                throw new HyracksDataException(e);
-            }
-            return object;
-        }
-
-        @Override
-        public void serialize(T instance, DataOutput out) throws HyracksDataException {
-            try {
-                instance.write(out);
-            } catch (IOException e) {
-                throw new HyracksDataException(e);
-            }
-        }
-    }
-
-    @SuppressWarnings({ "rawtypes", "unchecked" })
-    public static ISerializerDeserializer<? extends Writable> createSerializerDeserializer(
-            Class<? extends Writable> fClass) {
-        return new WritableSerializerDeserializer(fClass);
-    }
-
-    public static RecordDescriptor createKeyValueRecordDescriptor(Class<? extends Writable> keyClass,
-            Class<? extends Writable> valueClass) {
-        @SuppressWarnings("rawtypes")
-        ISerializerDeserializer[] fields = new ISerializerDeserializer[2];
-        fields[0] = createSerializerDeserializer(keyClass);
-        fields[1] = createSerializerDeserializer(valueClass);
-        return new RecordDescriptor(fields);
-    }
-
-    public static RecordDescriptor createOneFieldRecordDescriptor(Class<? extends Writable> fieldClass) {
-        @SuppressWarnings("rawtypes")
-        ISerializerDeserializer[] fields = new ISerializerDeserializer[1];
-        fields[0] = createSerializerDeserializer(fieldClass);
-        return new RecordDescriptor(fields);
-    }
-
-    public static JobConf map2JobConf(Map<String, String> jobConfMap) {
-        JobConf jobConf;
-        synchronized (Configuration.class) {
-            jobConf = new JobConf();
-            for (Entry<String, String> entry : jobConfMap.entrySet()) {
-                jobConf.set(entry.getKey(), entry.getValue());
-            }
-        }
-        return jobConf;
-    }
-
-    public static Map<String, String> jobConf2Map(JobConf jobConf) {
-        Map<String, String> jobConfMap = new HashMap<String, String>();
-        for (Entry<String, String> entry : jobConf) {
-            jobConfMap.put(entry.getKey(), entry.getValue());
-        }
-        return jobConfMap;
-    }
-}
\ No newline at end of file
diff --git a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/PregelixHyracksIntegrationUtil.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/PregelixHyracksIntegrationUtil.java
index cd2a864..b761f62 100644
--- a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/PregelixHyracksIntegrationUtil.java
+++ b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/PregelixHyracksIntegrationUtil.java
@@ -14,7 +14,6 @@
  */
 package edu.uci.ics.pregelix.core.util;
 
-import java.io.File;
 import java.util.EnumSet;
 
 import edu.uci.ics.hyracks.api.client.HyracksConnection;
@@ -27,6 +26,7 @@
 import edu.uci.ics.hyracks.control.common.controllers.NCConfig;
 import edu.uci.ics.hyracks.control.nc.NodeControllerService;
 import edu.uci.ics.pregelix.core.jobgen.clusterconfig.ClusterConfig;
+import edu.uci.ics.pregelix.runtime.bootstrap.NCApplicationEntryPoint;
 
 public class PregelixHyracksIntegrationUtil {
 
@@ -54,7 +54,6 @@
         ccConfig.defaultMaxJobAttempts = 0;
         ccConfig.jobHistorySize = 0;
         ccConfig.profileDumpPeriod = -1;
-        ccConfig.clusterTopologyDefinition = new File(topologyFilePath);
 
         // cluster controller
         cc = new ClusterControllerService(ccConfig);
@@ -68,6 +67,7 @@
         ncConfig1.dataIPAddress = "127.0.0.1";
         ncConfig1.datasetIPAddress = "127.0.0.1";
         ncConfig1.nodeId = NC1_ID;
+        ncConfig1.appNCMainClass = NCApplicationEntryPoint.class.getName();
         nc1 = new NodeControllerService(ncConfig1);
         nc1.start();
 
@@ -78,6 +78,7 @@
         ncConfig2.dataIPAddress = "127.0.0.1";
         ncConfig2.datasetIPAddress = "127.0.0.1";
         ncConfig2.nodeId = NC2_ID;
+        ncConfig2.appNCMainClass = NCApplicationEntryPoint.class.getName();
         nc2 = new NodeControllerService(ncConfig2);
         nc2.start();
 
@@ -86,14 +87,6 @@
         ClusterConfig.loadClusterConfig(CC_HOST, TEST_HYRACKS_CC_CLIENT_PORT);
     }
 
-    public static void destroyApp(String hyracksAppName) throws Exception {
-        hcc.destroyApplication(hyracksAppName);
-    }
-
-    public static void createApp(String hyracksAppName) throws Exception {
-        hcc.createApplication(hyracksAppName, null);
-    }
-
     public static void deinit() throws Exception {
         nc2.stop();
         nc1.stop();
@@ -102,7 +95,7 @@
 
     public static void runJob(JobSpecification spec, String appName) throws Exception {
         spec.setFrameSize(FRAME_SIZE);
-        JobId jobId = hcc.startJob(appName, spec, EnumSet.of(JobFlag.PROFILE_RUNTIME));
+        JobId jobId = hcc.startJob(spec, EnumSet.of(JobFlag.PROFILE_RUNTIME));
         hcc.waitForCompletion(jobId);
     }
 
diff --git a/pregelix/pregelix-core/src/main/resources/scripts/pregelixcc b/pregelix/pregelix-core/src/main/resources/scripts/pregelixcc
new file mode 100755
index 0000000..461d76a
--- /dev/null
+++ b/pregelix/pregelix-core/src/main/resources/scripts/pregelixcc
@@ -0,0 +1,117 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+#  Copyright 2001-2006 The Apache Software Foundation.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+# ----------------------------------------------------------------------------
+#
+#   Copyright (c) 2001-2006 The Apache Software Foundation.  All rights
+#   reserved.
+
+
+# resolve links - $0 may be a softlink
+PRG="$0"
+
+while [ -h "$PRG" ]; do
+  ls=`ls -ld "$PRG"`
+  link=`expr "$ls" : '.*-> \(.*\)$'`
+  if expr "$link" : '/.*' > /dev/null; then
+    PRG="$link"
+  else
+    PRG=`dirname "$PRG"`/"$link"
+  fi
+done
+
+PRGDIR=`dirname "$PRG"`
+BASEDIR=`cd "$PRGDIR/.." >/dev/null; pwd`
+
+
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  Darwin*) darwin=true
+           if [ -z "$JAVA_VERSION" ] ; then
+             JAVA_VERSION="CurrentJDK"
+           else
+             echo "Using Java version: $JAVA_VERSION"
+           fi
+           if [ -z "$JAVA_HOME" ] ; then
+             JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Versions/${JAVA_VERSION}/Home
+           fi
+           ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] && CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# If a specific java binary isn't specified search for the standard 'java' binary
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD=`which java`
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." 1>&2
+  echo "  We cannot execute $JAVACMD" 1>&2
+  exit 1
+fi
+
+if [ -z "$REPO" ]
+then
+  REPO="$BASEDIR"/lib
+fi
+
+CLASSPATH=$CLASSPATH_PREFIX:"$HADOOP_HOME"/conf:/etc/hadoop/conf:"$BASEDIR"/etc:$1
+
+for f in ${REPO}/*.jar; do
+  CLASSPATH=${CLASSPATH}:$f;
+done
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$CLASSPATH" ] && CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$HOME" ] && HOME=`cygpath --path --windows "$HOME"`
+  [ -n "$BASEDIR" ] && BASEDIR=`cygpath --path --windows "$BASEDIR"`
+  [ -n "$REPO" ] && REPO=`cygpath --path --windows "$REPO"`
+fi
+
+exec "$JAVACMD" $JAVA_OPTS  \
+  -classpath "$CLASSPATH" \
+  -Dapp.name="pregelixcc" \
+  -Dapp.pid="$$" \
+  -Dapp.repo="$REPO" \
+  -Dapp.home="$BASEDIR" \
+  -Dbasedir="$BASEDIR" \
+  edu.uci.ics.hyracks.control.cc.CCDriver \
+  "$@"
diff --git a/pregelix/pregelix-core/src/main/resources/scripts/pregelixnc b/pregelix/pregelix-core/src/main/resources/scripts/pregelixnc
new file mode 100755
index 0000000..4a6ca1f
--- /dev/null
+++ b/pregelix/pregelix-core/src/main/resources/scripts/pregelixnc
@@ -0,0 +1,118 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+#  Copyright 2001-2006 The Apache Software Foundation.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+# ----------------------------------------------------------------------------
+#
+#   Copyright (c) 2001-2006 The Apache Software Foundation.  All rights
+#   reserved.
+
+
+# resolve links - $0 may be a softlink
+PRG="$0"
+
+while [ -h "$PRG" ]; do
+  ls=`ls -ld "$PRG"`
+  link=`expr "$ls" : '.*-> \(.*\)$'`
+  if expr "$link" : '/.*' > /dev/null; then
+    PRG="$link"
+  else
+    PRG=`dirname "$PRG"`/"$link"
+  fi
+done
+
+PRGDIR=`dirname "$PRG"`
+BASEDIR=`cd "$PRGDIR/.." >/dev/null; pwd`
+
+
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  Darwin*) darwin=true
+           if [ -z "$JAVA_VERSION" ] ; then
+             JAVA_VERSION="CurrentJDK"
+           else
+             echo "Using Java version: $JAVA_VERSION"
+           fi
+           if [ -z "$JAVA_HOME" ] ; then
+             JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Versions/${JAVA_VERSION}/Home
+           fi
+           ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] && CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# If a specific java binary isn't specified search for the standard 'java' binary
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD=`which java`
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." 1>&2
+  echo "  We cannot execute $JAVACMD" 1>&2
+  exit 1
+fi
+
+if [ -z "$REPO" ]
+then
+  REPO="$BASEDIR"/lib
+fi
+
+CLASSPATH=$CLASSPATH_PREFIX:"$HADOOP_HOME"/conf:/etc/hadoop/conf:"$BASEDIR"/etc:$1
+
+for f in ${REPO}/*.jar; do
+  CLASSPATH=${CLASSPATH}:$f;
+done
+
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$CLASSPATH" ] && CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$HOME" ] && HOME=`cygpath --path --windows "$HOME"`2
+  [ -n "$BASEDIR" ] && BASEDIR=`cygpath --path --windows "$BASEDIR"`
+  [ -n "$REPO" ] && REPO=`cygpath --path --windows "$REPO"`
+fi
+
+exec "$JAVACMD" $JAVA_OPTS  \
+  -classpath "$CLASSPATH" \
+  -Dapp.name="pregelixnc" \
+  -Dapp.pid="$$" \
+  -Dapp.repo="$REPO" \
+  -Dapp.home="$BASEDIR" \
+  -Dbasedir="$BASEDIR" \
+  edu.uci.ics.hyracks.control.nc.NCDriver \
+  -app-nc-main-class edu.uci.ics.pregelix.runtime.bootstrap.NCApplicationEntryPoint "$@"
diff --git a/pregelix/pregelix-core/src/main/resources/scripts/startcc.sh b/pregelix/pregelix-core/src/main/resources/scripts/startcc.sh
index 133b604..74f0987 100644
--- a/pregelix/pregelix-core/src/main/resources/scripts/startcc.sh
+++ b/pregelix/pregelix-core/src/main/resources/scripts/startcc.sh
@@ -20,12 +20,15 @@
 export JAVA_HOME=$JAVA_HOME
 export JAVA_OPTS=$CCJAVA_OPTS
 
+PREGELIX_HOME=`pwd`
 
-chmod -R 755 $HYRACKS_HOME
+#Enter the temp dir
+cd $CCTMP_DIR
+
 if [ -f "conf/topology.xml"  ]; then
 #Launch hyracks cc script with topology
-$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyrackscc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 0 -cluster-topology "conf/topology.xml" &> $CCLOGS_DIR/cc.log &
+${PREGELIX_HOME}/bin/pregelixcc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 0 -cluster-topology "conf/topology.xml" &> $CCLOGS_DIR/cc.log &
 else
 #Launch hyracks cc script without toplogy
-$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyrackscc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 0 &> $CCLOGS_DIR/cc.log &
+${PREGELIX_HOME}/bin/pregelixcc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 0 &> $CCLOGS_DIR/cc.log &
 fi
diff --git a/pregelix/pregelix-core/src/main/resources/scripts/startnc.sh b/pregelix/pregelix-core/src/main/resources/scripts/startnc.sh
index b059aad..3ab1b25 100644
--- a/pregelix/pregelix-core/src/main/resources/scripts/startnc.sh
+++ b/pregelix/pregelix-core/src/main/resources/scripts/startnc.sh
@@ -39,11 +39,10 @@
 #Set JAVA_OPTS
 export JAVA_OPTS=$NCJAVA_OPTS
 
-cd $HYRACKS_HOME
-HYRACKS_HOME=`pwd`
+PREGELIX_HOME=`pwd`
 
 #Enter the temp dir
 cd $NCTMP_DIR
 
 #Launch hyracks nc
-$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyracksnc -cc-host $CCHOST -cc-port $CC_CLUSTERPORT -cluster-net-ip-address $IPADDR  -data-ip-address $IPADDR -result-ip-address $IPADDR  -node-id $NODEID -iodevices "${IO_DIRS}" &> $NCLOGS_DIR/$NODEID.log &
+${PREGELIX_HOME}/bin/pregelixnc -cc-host $CCHOST -cc-port $CC_CLUSTERPORT -cluster-net-ip-address $IPADDR  -data-ip-address $IPADDR -result-ip-address $IPADDR  -node-id $NODEID -iodevices "${IO_DIRS}" &> $NCLOGS_DIR/$NODEID.log &
diff --git a/pregelix/pregelix-core/src/main/resources/scripts/stopcc.sh b/pregelix/pregelix-core/src/main/resources/scripts/stopcc.sh
index c2f525a..84f369f 100644
--- a/pregelix/pregelix-core/src/main/resources/scripts/stopcc.sh
+++ b/pregelix/pregelix-core/src/main/resources/scripts/stopcc.sh
@@ -2,7 +2,18 @@
 . conf/cluster.properties
 
 #Kill process
-PID=`ps -ef|grep ${USER}|grep java|grep hyracks|awk '{print $2}'`
+#Kill process
+PID=`ps -ef|grep ${USER}|grep java|grep 'Dapp.name=pregelixcc'|awk '{print $2}'`
+
+if [ "$PID" == "" ]; then
+    PID=`ps -ef|grep ${USER}|grep java|grep 'hyracks'|awk '{print $2}'`
+fi
+
+if [ "$PID" == "" ]; then
+    USERID=`id | sed 's/^uid=//;s/(.*$//'`
+    PID=`ps -ef|grep ${USERID}|grep java|grep 'Dapp.name=pregelixcc'|awk '{print $2}'`
+fi
+
 echo $PID
 kill -9 $PID
 
diff --git a/pregelix/pregelix-core/src/main/resources/scripts/stopnc.sh b/pregelix/pregelix-core/src/main/resources/scripts/stopnc.sh
index 35c4794..7a5352d 100644
--- a/pregelix/pregelix-core/src/main/resources/scripts/stopnc.sh
+++ b/pregelix/pregelix-core/src/main/resources/scripts/stopnc.sh
@@ -2,7 +2,11 @@
 . conf/cluster.properties
 
 #Kill process
-PID=`ps -ef|grep ${USER}|grep java|grep 'Dapp.name=hyracksnc'|awk '{print $2}'`
+PID=`ps -ef|grep ${USER}|grep java|grep 'Dapp.name=pregelixnc'|awk '{print $2}'`
+
+if [ "$PID" == "" ]; then
+  PID=`ps -ef|grep ${USER}|grep java|grep 'hyracks'|awk '{print $2}'`
+fi
 
 if [ "$PID" == "" ]; then
   PID=`ps -ef|grep ${USER}|grep java|grep 'hyracks'|awk '{print $2}'`
@@ -10,7 +14,7 @@
 
 if [ "$PID" == "" ]; then
   USERID=`id | sed 's/^uid=//;s/(.*$//'`
-  PID=`ps -ef|grep ${USERID}|grep java|grep 'Dapp.name=hyracksnc'|awk '{print $2}'`
+  PID=`ps -ef|grep ${USERID}|grep java|grep 'Dapp.name=pregelixnc'|awk '{print $2}'`
 fi
 
 echo $PID
diff --git a/pregelix/pregelix-core/src/test/java/edu/uci/ics/pregelix/core/join/JoinTest.java b/pregelix/pregelix-core/src/test/java/edu/uci/ics/pregelix/core/join/JoinTest.java
index f7cadf6..a343cae 100644
--- a/pregelix/pregelix-core/src/test/java/edu/uci/ics/pregelix/core/join/JoinTest.java
+++ b/pregelix/pregelix-core/src/test/java/edu/uci/ics/pregelix/core/join/JoinTest.java
@@ -50,14 +50,14 @@
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMInteriorFrameFactory;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMLeafFrameFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriterFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.TransientLocalResourceFactoryProvider;
 import edu.uci.ics.pregelix.core.data.TypeTraits;
 import edu.uci.ics.pregelix.core.jobgen.clusterconfig.ClusterConfig;
 import edu.uci.ics.pregelix.core.util.PregelixHyracksIntegrationUtil;
@@ -65,8 +65,8 @@
 import edu.uci.ics.pregelix.dataflow.VertexWriteOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.std.IndexNestedLoopJoinOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.std.ProjectOperatorDescriptor;
+import edu.uci.ics.pregelix.runtime.bootstrap.IndexLifeCycleManagerProvider;
 import edu.uci.ics.pregelix.runtime.bootstrap.StorageManagerInterface;
-import edu.uci.ics.pregelix.runtime.bootstrap.TreeIndexRegistryProvider;
 
 public class JoinTest {
     private final static String ACTUAL_RESULT_DIR = "actual";
@@ -82,7 +82,7 @@
     private static final String PATH_TO_CLUSTER_PROPERTIES = "src/test/resources/cluster/cluster.properties";
 
     private static final float DEFAULT_BTREE_FILL_FACTOR = 1.00f;
-    private IIndexRegistryProvider<IIndex> treeRegistry = TreeIndexRegistryProvider.INSTANCE;
+    private IIndexLifecycleManagerProvider lcManagerProvider = IndexLifeCycleManagerProvider.INSTANCE;
     private IStorageManagerInterface storageManagerInterface = StorageManagerInterface.INSTANCE;
 
     private IBinaryHashFunctionFactory stringHashFactory = new PointableBinaryHashFunctionFactory(
@@ -103,7 +103,6 @@
         ClusterConfig.setClusterPropertiesPath(PATH_TO_CLUSTER_PROPERTIES);
         cleanupStores();
         PregelixHyracksIntegrationUtil.init("src/test/resources/topology.xml");
-        PregelixHyracksIntegrationUtil.createApp(HYRACKS_APP_NAME);
 
         FileUtils.forceMkdir(new File(EXPECT_RESULT_DIR));
         FileUtils.forceMkdir(new File(ACTUAL_RESULT_DIR));
@@ -121,7 +120,6 @@
         runIndexRightOuterJoin();
         TestUtils.compareWithResult(new File(EXPECTED_RESULT_FILE), new File(ACTUAL_RESULT_FILE));
 
-        PregelixHyracksIntegrationUtil.destroyApp(HYRACKS_APP_NAME);
         PregelixHyracksIntegrationUtil.deinit();
     }
 
@@ -195,8 +193,8 @@
         FileSplit[] results = new FileSplit[1];
         results[0] = resultFile;
         IFileSplitProvider resultFileSplitProvider = new ConstantFileSplitProvider(results);
-        VertexWriteOperatorDescriptor writer = new VertexWriteOperatorDescriptor(spec, null, resultFileSplitProvider, null,
-                null);
+        VertexWriteOperatorDescriptor writer = new VertexWriteOperatorDescriptor(spec, null, resultFileSplitProvider,
+                null, null);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, writer, new String[] { NC1_ID });
         PartitionConstraintHelper.addPartitionCountConstraint(spec, writer, 1);
 
@@ -234,8 +232,9 @@
         for (int i = 0; i < typeTraits.length; i++)
             typeTraits[i] = new TypeTraits(false);
         TreeIndexCreateOperatorDescriptor writer = new TreeIndexCreateOperatorDescriptor(spec, storageManagerInterface,
-                treeRegistry, fileSplitProvider, typeTraits, comparatorFactories, new BTreeDataflowHelperFactory(),
-                NoOpOperationCallbackProvider.INSTANCE);
+                lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories, null,
+                new BTreeDataflowHelperFactory(), new TransientLocalResourceFactoryProvider(),
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, writer, NC1_ID, NC2_ID);
         spec.addRoot(writer);
         runTest(spec);
@@ -278,9 +277,9 @@
         for (int i = 0; i < typeTraits.length; i++)
             typeTraits[i] = new TypeTraits(false);
         TreeIndexBulkLoadOperatorDescriptor writer = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManagerInterface, treeRegistry, fileSplitProvider, typeTraits, comparatorFactories,
-                fieldPermutation, DEFAULT_BTREE_FILL_FACTOR, new BTreeDataflowHelperFactory(),
-                NoOpOperationCallbackProvider.INSTANCE);
+                storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories, null,
+                fieldPermutation, DEFAULT_BTREE_FILL_FACTOR, false, 0, new BTreeDataflowHelperFactory(),
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, writer, NC1_ID, NC2_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), custScanner, 0, sorter, 0);
@@ -353,8 +352,8 @@
         for (int i = 0; i < typeTraits.length; i++)
             typeTraits[i] = new TypeTraits(false);
         IndexNestedLoopJoinOperatorDescriptor join = new IndexNestedLoopJoinOperatorDescriptor(spec, custOrderJoinDesc,
-                storageManagerInterface, treeRegistry, fileSplitProvider, typeTraits, keyComparatorFactories, true,
-                keyFields, keyFields, true, true, new BTreeDataflowHelperFactory());
+                storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, keyComparatorFactories,
+                true, keyFields, keyFields, true, true, new BTreeDataflowHelperFactory());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID, NC2_ID);
 
         /** results (already in sorted order) */
@@ -362,8 +361,8 @@
         FileSplit[] results = new FileSplit[1];
         results[0] = resultFile;
         IFileSplitProvider resultFileSplitProvider = new ConstantFileSplitProvider(results);
-        VertexWriteOperatorDescriptor writer = new VertexWriteOperatorDescriptor(spec, null, resultFileSplitProvider, null,
-                null);
+        VertexWriteOperatorDescriptor writer = new VertexWriteOperatorDescriptor(spec, null, resultFileSplitProvider,
+                null, null);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, writer, new String[] { NC1_ID });
         PartitionConstraintHelper.addPartitionCountConstraint(spec, writer, 1);
 
@@ -459,8 +458,8 @@
         FileSplit[] results = new FileSplit[1];
         results[0] = resultFile;
         IFileSplitProvider resultFileSplitProvider = new ConstantFileSplitProvider(results);
-        VertexWriteOperatorDescriptor writer = new VertexWriteOperatorDescriptor(spec, null, resultFileSplitProvider, null,
-                null);
+        VertexWriteOperatorDescriptor writer = new VertexWriteOperatorDescriptor(spec, null, resultFileSplitProvider,
+                null, null);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, writer, new String[] { NC1_ID });
         PartitionConstraintHelper.addPartitionCountConstraint(spec, writer, 1);
 
@@ -556,7 +555,7 @@
         ITreeIndexFrameFactory leafFrameFactory = new BTreeNSMLeafFrameFactory(new TypeAwareTupleWriterFactory(
                 typeTraits));
         IndexNestedLoopJoinOperatorDescriptor join = new IndexNestedLoopJoinOperatorDescriptor(spec, custOrderJoinDesc,
-                storageManagerInterface, treeRegistry, fileSplitProvider, interiorFrameFactory, leafFrameFactory,
+                storageManagerInterface, lcManagerProvider, fileSplitProvider, interiorFrameFactory, leafFrameFactory,
                 typeTraits, keyComparatorFactories, true, keyFields, keyFields, true, true,
                 new BTreeDataflowHelperFactory(), true, nullWriterFactories);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID, NC2_ID);
@@ -566,8 +565,8 @@
         FileSplit[] results = new FileSplit[1];
         results[0] = resultFile;
         IFileSplitProvider resultFileSplitProvider = new ConstantFileSplitProvider(results);
-        VertexWriteOperatorDescriptor writer = new VertexWriteOperatorDescriptor(spec, null, resultFileSplitProvider, null,
-                null);
+        VertexWriteOperatorDescriptor writer = new VertexWriteOperatorDescriptor(spec, null, resultFileSplitProvider,
+                null, null);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, writer, new String[] { NC1_ID });
         PartitionConstraintHelper.addPartitionCountConstraint(spec, writer, 1);
 
diff --git a/pregelix/pregelix-dataflow-std-base/pom.xml b/pregelix/pregelix-dataflow-std-base/pom.xml
index eeaa6c9..1ebc65d 100644
--- a/pregelix/pregelix-dataflow-std-base/pom.xml
+++ b/pregelix/pregelix-dataflow-std-base/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
     		<groupId>edu.uci.ics.hyracks</groupId>
     		<artifactId>pregelix</artifactId>
-    		<version>0.2.4-SNAPSHOT</version>
+    		<version>0.2.5-SNAPSHOT</version>
   	</parent>
 
 
@@ -42,8 +42,9 @@
 				</configuration>
 			</plugin>
 			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
+                <version>2.4.1</version>
 				<configuration>
 					<filesets>
 						<fileset>
@@ -73,14 +74,14 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-api</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/pregelix/pregelix-dataflow-std-base/src/main/java/edu/uci/ics/pregelix/dataflow/std/base/IAggregateFunctionFactory.java b/pregelix/pregelix-dataflow-std-base/src/main/java/edu/uci/ics/pregelix/dataflow/std/base/IAggregateFunctionFactory.java
index 4be0bed..dc75b07 100644
--- a/pregelix/pregelix-dataflow-std-base/src/main/java/edu/uci/ics/pregelix/dataflow/std/base/IAggregateFunctionFactory.java
+++ b/pregelix/pregelix-dataflow-std-base/src/main/java/edu/uci/ics/pregelix/dataflow/std/base/IAggregateFunctionFactory.java
@@ -16,9 +16,11 @@
 
 import java.io.Serializable;
 
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
 
 public interface IAggregateFunctionFactory extends Serializable {
-    public IAggregateFunction createAggregateFunction(IDataOutputProvider provider) throws HyracksException;
+	public IAggregateFunction createAggregateFunction(IHyracksTaskContext ctx,
+			IDataOutputProvider provider) throws HyracksException;
 }
\ No newline at end of file
diff --git a/pregelix/pregelix-dataflow-std-base/src/main/java/edu/uci/ics/pregelix/dataflow/std/base/IRecordDescriptorFactory.java b/pregelix/pregelix-dataflow-std-base/src/main/java/edu/uci/ics/pregelix/dataflow/std/base/IRecordDescriptorFactory.java
index e7de650..7454f2d 100644
--- a/pregelix/pregelix-dataflow-std-base/src/main/java/edu/uci/ics/pregelix/dataflow/std/base/IRecordDescriptorFactory.java
+++ b/pregelix/pregelix-dataflow-std-base/src/main/java/edu/uci/ics/pregelix/dataflow/std/base/IRecordDescriptorFactory.java
@@ -16,11 +16,12 @@
 
 import java.io.Serializable;
 
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 
 public interface IRecordDescriptorFactory extends Serializable {
 
-    public RecordDescriptor createRecordDescriptor() throws HyracksDataException;
+    public RecordDescriptor createRecordDescriptor(IHyracksTaskContext ctx) throws HyracksDataException;
 
 }
diff --git a/pregelix/pregelix-dataflow-std-base/src/main/java/edu/uci/ics/pregelix/dataflow/std/base/ISerializerDeserializerFactory.java b/pregelix/pregelix-dataflow-std-base/src/main/java/edu/uci/ics/pregelix/dataflow/std/base/ISerializerDeserializerFactory.java
new file mode 100644
index 0000000..16b067a
--- /dev/null
+++ b/pregelix/pregelix-dataflow-std-base/src/main/java/edu/uci/ics/pregelix/dataflow/std/base/ISerializerDeserializerFactory.java
@@ -0,0 +1,11 @@
+package edu.uci.ics.pregelix.dataflow.std.base;
+
+import java.io.Serializable;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+
+public interface ISerializerDeserializerFactory<T> extends Serializable {
+
+	public ISerializerDeserializer<T> getSerializerDeserializer();
+
+}
diff --git a/pregelix/pregelix-dataflow-std/pom.xml b/pregelix/pregelix-dataflow-std/pom.xml
index 889c876..884577e 100644
--- a/pregelix/pregelix-dataflow-std/pom.xml
+++ b/pregelix/pregelix-dataflow-std/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 
@@ -42,8 +42,9 @@
 				</configuration>
 			</plugin>
 			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
+				<version>2.4.1</version>
 				<configuration>
 					<filesets>
 						<fileset>
@@ -73,77 +74,77 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow-std-base</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-hdfs-core</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-common</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-btree</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-ipc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/BTreeSearchFunctionUpdateOperatorDescriptor.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/BTreeSearchFunctionUpdateOperatorDescriptor.java
index 99e55f1..c9f3fe7 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/BTreeSearchFunctionUpdateOperatorDescriptor.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/BTreeSearchFunctionUpdateOperatorDescriptor.java
@@ -23,12 +23,12 @@
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.TransientLocalResourceFactoryProvider;
 import edu.uci.ics.pregelix.dataflow.std.base.IRecordDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IRuntimeHookFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IUpdateFunctionFactory;
@@ -53,14 +53,16 @@
     private final int outputArity;
 
     public BTreeSearchFunctionUpdateOperatorDescriptor(JobSpecification spec, RecordDescriptor recDesc,
-            IStorageManagerInterface storageManager, IIndexRegistryProvider<IIndex> indexRegistryProvider,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lcManagerProvider,
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, boolean isForward, int[] lowKeyFields, int[] highKeyFields,
             boolean lowKeyInclusive, boolean highKeyInclusive, IIndexDataflowHelperFactory dataflowHelperFactory,
             IRecordDescriptorFactory inputRdFactory, int outputArity, IUpdateFunctionFactory functionFactory,
             IRuntimeHookFactory preHookFactory, IRuntimeHookFactory postHookFactory, RecordDescriptor... rDescs) {
-        super(spec, 1, outputArity, recDesc, storageManager, indexRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, dataflowHelperFactory, null, false, NoOpOperationCallbackProvider.INSTANCE);
+        super(spec, 1, outputArity, recDesc, storageManager, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, dataflowHelperFactory, null, false,
+                new TransientLocalResourceFactoryProvider(), NoOpOperationCallbackFactory.INSTANCE,
+                NoOpOperationCallbackFactory.INSTANCE);
         this.isForward = isForward;
         this.lowKeyFields = lowKeyFields;
         this.highKeyFields = highKeyFields;
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/BTreeSearchFunctionUpdateOperatorNodePushable.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/BTreeSearchFunctionUpdateOperatorNodePushable.java
index 3938613..ff95e52 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/BTreeSearchFunctionUpdateOperatorNodePushable.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/BTreeSearchFunctionUpdateOperatorNodePushable.java
@@ -36,9 +36,10 @@
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.PermutingFrameTupleReference;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingFrameTupleReference;
 import edu.uci.ics.pregelix.dataflow.std.base.IRecordDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IRuntimeHookFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IUpdateFunctionFactory;
@@ -106,11 +107,11 @@
          * open the function
          */
         functionProxy.functionOpen();
-        accessor = new FrameTupleAccessor(treeIndexHelper.getHyracksTaskContext().getFrameSize(), recDesc);
+        accessor = new FrameTupleAccessor(treeIndexHelper.getTaskContext().getFrameSize(), recDesc);
 
         try {
-            treeIndexHelper.init(false);
-            btree = (BTree) treeIndexHelper.getIndex();
+            treeIndexHelper.open();
+            btree = (BTree) treeIndexHelper.getIndexInstance();
             cursorFrame = btree.getLeafFrameFactory().createFrame();
             setCursor();
 
@@ -120,17 +121,17 @@
             rangePred = new RangePredicate(null, null, lowKeyInclusive, highKeyInclusive, lowKeySearchCmp,
                     highKeySearchCmp);
 
-            writeBuffer = treeIndexHelper.getHyracksTaskContext().allocateFrame();
+            writeBuffer = treeIndexHelper.getTaskContext().allocateFrame();
             tb = new ArrayTupleBuilder(btree.getFieldCount());
             dos = tb.getDataOutput();
-            appender = new FrameTupleAppender(treeIndexHelper.getHyracksTaskContext().getFrameSize());
+            appender = new FrameTupleAppender(treeIndexHelper.getTaskContext().getFrameSize());
             appender.reset(writeBuffer, true);
-            indexAccessor = btree.createAccessor();
+            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
 
             cloneUpdateTb = new ArrayTupleBuilder(btree.getFieldCount());
             updateBuffer.setFieldCount(btree.getFieldCount());
         } catch (Exception e) {
-            treeIndexHelper.deinit();
+            treeIndexHelper.close();
             throw new HyracksDataException(e);
         }
     }
@@ -203,7 +204,7 @@
              */
             functionProxy.functionClose();
         } finally {
-            treeIndexHelper.deinit();
+            treeIndexHelper.close();
         }
     }
 
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/FunctionCallOperatorDescriptor.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/FunctionCallOperatorDescriptor.java
index 4cbd6c4..24d28b0 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/FunctionCallOperatorDescriptor.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/FunctionCallOperatorDescriptor.java
@@ -66,7 +66,7 @@
             @Override
             public void open() throws HyracksDataException {
                 rd0 = inputRdFactory == null ? recordDescProvider.getInputRecordDescriptor(getActivityId(), 0)
-                        : inputRdFactory.createRecordDescriptor();
+                        : inputRdFactory.createRecordDescriptor(ctx);
                 frameDeserializer = new FrameDeserializer(ctx.getFrameSize(), rd0);
                 ctxCL = Thread.currentThread().getContextClassLoader();
                 Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorDescriptor.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorDescriptor.java
index 60559e8..7662aa8 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorDescriptor.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorDescriptor.java
@@ -25,13 +25,13 @@
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.TransientLocalResourceFactoryProvider;
 import edu.uci.ics.pregelix.dataflow.std.base.IRecordDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IRuntimeHookFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IUpdateFunctionFactory;
@@ -61,14 +61,16 @@
     private final int outputArity;
 
     public IndexNestedLoopJoinFunctionUpdateOperatorDescriptor(JobSpecification spec,
-            IStorageManagerInterface storageManager, IIndexRegistryProvider<IIndex> treeIndexRegistryProvider,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lcManagerProvider,
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, boolean isForward, int[] lowKeyFields, int[] highKeyFields,
             boolean lowKeyInclusive, boolean highKeyInclusive, IIndexDataflowHelperFactory opHelperFactory,
             IRecordDescriptorFactory inputRdFactory, int outputArity, IUpdateFunctionFactory functionFactory,
             IRuntimeHookFactory preHookFactory, IRuntimeHookFactory postHookFactory, RecordDescriptor... rDescs) {
-        super(spec, 1, outputArity, rDescs[0], storageManager, treeIndexRegistryProvider, fileSplitProvider,
-                typeTraits, comparatorFactories, opHelperFactory, null, false, NoOpOperationCallbackProvider.INSTANCE);
+        super(spec, 1, outputArity, rDescs[0], storageManager, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, highKeyFields, opHelperFactory, null, false,
+                new TransientLocalResourceFactoryProvider(), NoOpOperationCallbackFactory.INSTANCE,
+                NoOpOperationCallbackFactory.INSTANCE);
         this.isForward = isForward;
         this.lowKeyFields = lowKeyFields;
         this.highKeyFields = highKeyFields;
@@ -88,7 +90,7 @@
     }
 
     public IndexNestedLoopJoinFunctionUpdateOperatorDescriptor(JobSpecification spec,
-            IStorageManagerInterface storageManager, IIndexRegistryProvider<IIndex> treeIndexRegistryProvider,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lcManagerProvider,
             IFileSplitProvider fileSplitProvider, ITreeIndexFrameFactory interiorFrameFactory,
             ITreeIndexFrameFactory leafFrameFactory, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, boolean isForward, int[] lowKeyFields, int[] highKeyFields,
@@ -96,8 +98,10 @@
             boolean isRightOuter, INullWriterFactory[] nullWriterFactories, IRecordDescriptorFactory inputRdFactory,
             int outputArity, IUpdateFunctionFactory functionFactory, IRuntimeHookFactory preHookFactory,
             IRuntimeHookFactory postHookFactory, RecordDescriptor... rDescs) {
-        super(spec, 1, outputArity, rDescs[0], storageManager, treeIndexRegistryProvider, fileSplitProvider,
-                typeTraits, comparatorFactories, opHelperFactory, null, false, NoOpOperationCallbackProvider.INSTANCE);
+        super(spec, 1, outputArity, rDescs[0], storageManager, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, highKeyFields, opHelperFactory, null, false,
+                new TransientLocalResourceFactoryProvider(), NoOpOperationCallbackFactory.INSTANCE,
+                NoOpOperationCallbackFactory.INSTANCE);
         this.isForward = isForward;
         this.lowKeyFields = lowKeyFields;
         this.highKeyFields = highKeyFields;
@@ -120,7 +124,7 @@
     }
 
     public IndexNestedLoopJoinFunctionUpdateOperatorDescriptor(JobSpecification spec,
-            IStorageManagerInterface storageManager, IIndexRegistryProvider<IIndex> treeIndexRegistryProvider,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lcManagerProvider,
             IFileSplitProvider fileSplitProvider, ITreeIndexFrameFactory interiorFrameFactory,
             ITreeIndexFrameFactory leafFrameFactory, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, boolean isForward, int[] lowKeyFields, int[] highKeyFields,
@@ -128,8 +132,10 @@
             boolean isSetUnion, IRecordDescriptorFactory inputRdFactory, int outputArity,
             IUpdateFunctionFactory functionFactory, IRuntimeHookFactory preHookFactory,
             IRuntimeHookFactory postHookFactory, RecordDescriptor... rDescs) {
-        super(spec, 1, outputArity, rDescs[0], storageManager, treeIndexRegistryProvider, fileSplitProvider,
-                typeTraits, comparatorFactories, opHelperFactory, null, false, NoOpOperationCallbackProvider.INSTANCE);
+        super(spec, 1, outputArity, rDescs[0], storageManager, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, highKeyFields, opHelperFactory, null, false,
+                new TransientLocalResourceFactoryProvider(), NoOpOperationCallbackFactory.INSTANCE,
+                NoOpOperationCallbackFactory.INSTANCE);
         this.isForward = isForward;
         this.lowKeyFields = lowKeyFields;
         this.highKeyFields = highKeyFields;
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorNodePushable.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorNodePushable.java
index 37029f3..61e4649 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorNodePushable.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinFunctionUpdateOperatorNodePushable.java
@@ -36,9 +36,10 @@
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.PermutingFrameTupleReference;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingFrameTupleReference;
 import edu.uci.ics.pregelix.dataflow.std.base.IRecordDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IRuntimeHookFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IUpdateFunctionFactory;
@@ -104,12 +105,11 @@
          * open the function
          */
         functionProxy.functionOpen();
-        accessor = new FrameTupleAccessor(treeIndexOpHelper.getHyracksTaskContext().getFrameSize(), recDesc);
+        accessor = new FrameTupleAccessor(treeIndexOpHelper.getTaskContext().getFrameSize(), recDesc);
 
         try {
-            treeIndexOpHelper.init(false);
-            btree = (BTree) treeIndexOpHelper.getIndex();
-            btree.open(treeIndexOpHelper.getIndexFileId());
+            treeIndexOpHelper.open();
+            btree = (BTree) treeIndexOpHelper.getIndexInstance();
             cursorFrame = btree.getLeafFrameFactory().createFrame();
             setCursor();
 
@@ -140,15 +140,15 @@
 
             rangePred = new RangePredicate(null, null, lowKeyInclusive, highKeyInclusive, lowKeySearchCmp,
                     highKeySearchCmp);
-            writeBuffer = treeIndexOpHelper.getHyracksTaskContext().allocateFrame();
-            appender = new FrameTupleAppender(treeIndexOpHelper.getHyracksTaskContext().getFrameSize());
+            writeBuffer = treeIndexOpHelper.getTaskContext().allocateFrame();
+            appender = new FrameTupleAppender(treeIndexOpHelper.getTaskContext().getFrameSize());
             appender.reset(writeBuffer, true);
 
-            indexAccessor = btree.createAccessor();
+            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
             cloneUpdateTb = new ArrayTupleBuilder(btree.getFieldCount());
             updateBuffer.setFieldCount(btree.getFieldCount());
         } catch (Exception e) {
-            treeIndexOpHelper.deinit();
+            treeIndexOpHelper.close();
             throw new HyracksDataException(e);
         }
     }
@@ -220,7 +220,7 @@
              */
             functionProxy.functionClose();
         } finally {
-            treeIndexOpHelper.deinit();
+            treeIndexOpHelper.close();
         }
     }
 
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinOperatorDescriptor.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinOperatorDescriptor.java
index ed177e3..d237761 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinOperatorDescriptor.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinOperatorDescriptor.java
@@ -24,13 +24,13 @@
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.TransientLocalResourceFactoryProvider;
 
 public class IndexNestedLoopJoinOperatorDescriptor extends AbstractTreeIndexOperatorDescriptor {
 
@@ -51,12 +51,13 @@
     private boolean isSetUnion = false;
 
     public IndexNestedLoopJoinOperatorDescriptor(JobSpecification spec, RecordDescriptor recDesc,
-            IStorageManagerInterface storageManager, IIndexRegistryProvider<IIndex> treeIndexRegistryProvider,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lcManagerProvider,
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, boolean isForward, int[] lowKeyFields, int[] highKeyFields,
             boolean lowKeyInclusive, boolean highKeyInclusive, IIndexDataflowHelperFactory opHelperFactory) {
-        super(spec, 1, 1, recDesc, storageManager, treeIndexRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, opHelperFactory, null, false, NoOpOperationCallbackProvider.INSTANCE);
+        super(spec, 1, 1, recDesc, storageManager, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, opHelperFactory, null, false, new TransientLocalResourceFactoryProvider(),
+                NoOpOperationCallbackFactory.INSTANCE, NoOpOperationCallbackFactory.INSTANCE);
         this.isForward = isForward;
         this.lowKeyFields = lowKeyFields;
         this.highKeyFields = highKeyFields;
@@ -65,14 +66,15 @@
     }
 
     public IndexNestedLoopJoinOperatorDescriptor(JobSpecification spec, RecordDescriptor recDesc,
-            IStorageManagerInterface storageManager, IIndexRegistryProvider<IIndex> treeIndexRegistryProvider,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lcManagerProvider,
             IFileSplitProvider fileSplitProvider, ITreeIndexFrameFactory interiorFrameFactory,
             ITreeIndexFrameFactory leafFrameFactory, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, boolean isForward, int[] lowKeyFields, int[] highKeyFields,
             boolean lowKeyInclusive, boolean highKeyInclusive, IIndexDataflowHelperFactory opHelperFactory,
             boolean isRightOuter, INullWriterFactory[] nullWriterFactories) {
-        super(spec, 1, 1, recDesc, storageManager, treeIndexRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, opHelperFactory, null, false, NoOpOperationCallbackProvider.INSTANCE);
+        super(spec, 1, 1, recDesc, storageManager, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, opHelperFactory, null, false, new TransientLocalResourceFactoryProvider(),
+                NoOpOperationCallbackFactory.INSTANCE, NoOpOperationCallbackFactory.INSTANCE);
         this.isForward = isForward;
         this.lowKeyFields = lowKeyFields;
         this.highKeyFields = highKeyFields;
@@ -84,14 +86,15 @@
     }
 
     public IndexNestedLoopJoinOperatorDescriptor(JobSpecification spec, RecordDescriptor recDesc,
-            IStorageManagerInterface storageManager, IIndexRegistryProvider<IIndex> treeIndexRegistryProvider,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lcManagerProvider,
             IFileSplitProvider fileSplitProvider, ITreeIndexFrameFactory interiorFrameFactory,
             ITreeIndexFrameFactory leafFrameFactory, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, boolean isForward, int[] lowKeyFields, int[] highKeyFields,
             boolean lowKeyInclusive, boolean highKeyInclusive, IIndexDataflowHelperFactory opHelperFactory,
             boolean isSetUnion) {
-        super(spec, 1, 1, recDesc, storageManager, treeIndexRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, opHelperFactory, null, false, NoOpOperationCallbackProvider.INSTANCE);
+        super(spec, 1, 1, recDesc, storageManager, lcManagerProvider, fileSplitProvider, typeTraits,
+                comparatorFactories, null, opHelperFactory, null, false, new TransientLocalResourceFactoryProvider(),
+                NoOpOperationCallbackFactory.INSTANCE, NoOpOperationCallbackFactory.INSTANCE);
         this.isForward = isForward;
         this.lowKeyFields = lowKeyFields;
         this.highKeyFields = highKeyFields;
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinOperatorNodePushable.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinOperatorNodePushable.java
index bd076d3..8b9bfc2 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinOperatorNodePushable.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopJoinOperatorNodePushable.java
@@ -34,9 +34,10 @@
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.PermutingFrameTupleReference;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingFrameTupleReference;
 
 public class IndexNestedLoopJoinOperatorNodePushable extends AbstractUnaryInputUnaryOutputOperatorNodePushable {
     private TreeIndexDataflowHelper treeIndexOpHelper;
@@ -86,11 +87,11 @@
 
     @Override
     public void open() throws HyracksDataException {
-        accessor = new FrameTupleAccessor(treeIndexOpHelper.getHyracksTaskContext().getFrameSize(), recDesc);
+        accessor = new FrameTupleAccessor(treeIndexOpHelper.getTaskContext().getFrameSize(), recDesc);
 
         try {
-            treeIndexOpHelper.init(false);
-            btree = (BTree) treeIndexOpHelper.getIndex();
+            treeIndexOpHelper.open();
+            btree = (BTree) treeIndexOpHelper.getIndexInstance();
             writer.open();
 
             int lowKeySearchFields = btree.getComparatorFactories().length;
@@ -118,15 +119,15 @@
 
             rangePred = new RangePredicate(null, null, lowKeyInclusive, highKeyInclusive, lowKeySearchCmp,
                     highKeySearchCmp);
-            writeBuffer = treeIndexOpHelper.getHyracksTaskContext().allocateFrame();
+            writeBuffer = treeIndexOpHelper.getTaskContext().allocateFrame();
             tb = new ArrayTupleBuilder(inputRecDesc.getFields().length + btree.getFieldCount());
             dos = tb.getDataOutput();
-            appender = new FrameTupleAppender(treeIndexOpHelper.getHyracksTaskContext().getFrameSize());
+            appender = new FrameTupleAppender(treeIndexOpHelper.getTaskContext().getFrameSize());
             appender.reset(writeBuffer, true);
-            indexAccessor = btree.createAccessor();
+            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
             setCursor();
         } catch (Exception e) {
-            treeIndexOpHelper.deinit();
+            treeIndexOpHelper.close();
             throw new HyracksDataException(e);
         }
     }
@@ -196,7 +197,7 @@
                 throw new HyracksDataException(e);
             }
         } finally {
-            treeIndexOpHelper.deinit();
+            treeIndexOpHelper.close();
         }
     }
 
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopRightOuterJoinFunctionUpdateOperatorNodePushable.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopRightOuterJoinFunctionUpdateOperatorNodePushable.java
index f7b3d62..5ca5382 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopRightOuterJoinFunctionUpdateOperatorNodePushable.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopRightOuterJoinFunctionUpdateOperatorNodePushable.java
@@ -38,9 +38,10 @@
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.PermutingFrameTupleReference;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingFrameTupleReference;
 import edu.uci.ics.pregelix.dataflow.std.base.IRecordDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IRuntimeHookFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IUpdateFunctionFactory;
@@ -116,11 +117,11 @@
          * function open
          */
         functionProxy.functionOpen();
-        accessor = new FrameTupleAccessor(treeIndexOpHelper.getHyracksTaskContext().getFrameSize(), recDesc);
+        accessor = new FrameTupleAccessor(treeIndexOpHelper.getTaskContext().getFrameSize(), recDesc);
 
         try {
-            treeIndexOpHelper.init(false);
-            btree = (BTree) treeIndexOpHelper.getIndex();
+            treeIndexOpHelper.open();
+            btree = (BTree) treeIndexOpHelper.getIndexInstance();
             cursorFrame = btree.getLeafFrameFactory().createFrame();
             setCursor();
 
@@ -147,7 +148,7 @@
 
             rangePred = new RangePredicate(null, null, true, true, lowKeySearchCmp, highKeySearchCmp);
 
-            writeBuffer = treeIndexOpHelper.getHyracksTaskContext().allocateFrame();
+            writeBuffer = treeIndexOpHelper.getTaskContext().allocateFrame();
 
             nullTupleBuilder = new ArrayTupleBuilder(inputRecDesc.getFields().length);
             dos = nullTupleBuilder.getDataOutput();
@@ -157,10 +158,10 @@
                 nullTupleBuilder.addFieldEndOffset();
             }
 
-            appender = new FrameTupleAppender(treeIndexOpHelper.getHyracksTaskContext().getFrameSize());
+            appender = new FrameTupleAppender(treeIndexOpHelper.getTaskContext().getFrameSize());
             appender.reset(writeBuffer, true);
 
-            indexAccessor = btree.createAccessor();
+            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
 
             /** set the search cursor */
             rangePred.setLowKey(null, true);
@@ -178,7 +179,7 @@
             cloneUpdateTb = new ArrayTupleBuilder(btree.getFieldCount());
             updateBuffer.setFieldCount(btree.getFieldCount());
         } catch (Exception e) {
-            treeIndexOpHelper.deinit();
+            treeIndexOpHelper.close();
             throw new HyracksDataException(e);
         }
     }
@@ -273,7 +274,7 @@
         } catch (Exception e) {
             throw new HyracksDataException(e);
         } finally {
-            treeIndexOpHelper.deinit();
+            treeIndexOpHelper.close();
         }
     }
 
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopRightOuterJoinOperatorNodePushable.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopRightOuterJoinOperatorNodePushable.java
index 9f1e1ad..d7c5d1f 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopRightOuterJoinOperatorNodePushable.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopRightOuterJoinOperatorNodePushable.java
@@ -38,9 +38,10 @@
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.PermutingFrameTupleReference;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingFrameTupleReference;
 
 public class IndexNestedLoopRightOuterJoinOperatorNodePushable extends
         AbstractUnaryInputUnaryOutputOperatorNodePushable {
@@ -97,10 +98,10 @@
 
     @Override
     public void open() throws HyracksDataException {
-        accessor = new FrameTupleAccessor(treeIndexOpHelper.getHyracksTaskContext().getFrameSize(), recDesc);
+        accessor = new FrameTupleAccessor(treeIndexOpHelper.getTaskContext().getFrameSize(), recDesc);
         try {
-            treeIndexOpHelper.init(false);
-            btree = (BTree) treeIndexOpHelper.getIndex();
+            treeIndexOpHelper.open();
+            btree = (BTree) treeIndexOpHelper.getIndexInstance();
             cursorFrame = btree.getLeafFrameFactory().createFrame();
             setCursor();
             writer.open();
@@ -129,13 +130,13 @@
 
             rangePred = new RangePredicate(null, null, true, true, lowKeySearchCmp, highKeySearchCmp);
 
-            writeBuffer = treeIndexOpHelper.getHyracksTaskContext().allocateFrame();
+            writeBuffer = treeIndexOpHelper.getTaskContext().allocateFrame();
             tb = new ArrayTupleBuilder(inputRecDesc.getFields().length + btree.getFieldCount());
             dos = tb.getDataOutput();
-            appender = new FrameTupleAppender(treeIndexOpHelper.getHyracksTaskContext().getFrameSize());
+            appender = new FrameTupleAppender(treeIndexOpHelper.getTaskContext().getFrameSize());
             appender.reset(writeBuffer, true);
 
-            indexAccessor = btree.createAccessor();
+            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
 
             /** set the search cursor */
             rangePred.setLowKey(null, true);
@@ -151,7 +152,7 @@
             }
 
         } catch (Exception e) {
-            treeIndexOpHelper.deinit();
+            treeIndexOpHelper.close();
             throw new HyracksDataException(e);
         }
     }
@@ -243,7 +244,7 @@
         } catch (Exception e) {
             throw new HyracksDataException(e);
         } finally {
-            treeIndexOpHelper.deinit();
+            treeIndexOpHelper.close();
         }
     }
 
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopSetUnionFunctionUpdateOperatorNodePushable.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopSetUnionFunctionUpdateOperatorNodePushable.java
index 6af60a8..160324e 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopSetUnionFunctionUpdateOperatorNodePushable.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopSetUnionFunctionUpdateOperatorNodePushable.java
@@ -36,9 +36,10 @@
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.PermutingFrameTupleReference;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingFrameTupleReference;
 import edu.uci.ics.pregelix.dataflow.std.base.IRecordDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IRuntimeHookFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IUpdateFunctionFactory;
@@ -104,11 +105,11 @@
     @Override
     public void open() throws HyracksDataException {
         functionProxy.functionOpen();
-        accessor = new FrameTupleAccessor(treeIndexOpHelper.getHyracksTaskContext().getFrameSize(), recDesc);
+        accessor = new FrameTupleAccessor(treeIndexOpHelper.getTaskContext().getFrameSize(), recDesc);
 
         try {
-            treeIndexOpHelper.init(false);
-            btree = (BTree) treeIndexOpHelper.getIndex();
+            treeIndexOpHelper.open();
+            btree = (BTree) treeIndexOpHelper.getIndexInstance();
             cursorFrame = btree.getLeafFrameFactory().createFrame();
             setCursor();
 
@@ -120,11 +121,11 @@
             }
             lowKeySearchCmp = new MultiComparator(lowKeySearchComparators);
 
-            writeBuffer = treeIndexOpHelper.getHyracksTaskContext().allocateFrame();
-            appender = new FrameTupleAppender(treeIndexOpHelper.getHyracksTaskContext().getFrameSize());
+            writeBuffer = treeIndexOpHelper.getTaskContext().allocateFrame();
+            appender = new FrameTupleAppender(treeIndexOpHelper.getTaskContext().getFrameSize());
             appender.reset(writeBuffer, true);
 
-            indexAccessor = btree.createAccessor();
+            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
 
             /** set the search cursor */
             rangePred.setLowKey(null, true);
@@ -141,7 +142,7 @@
             cloneUpdateTb = new ArrayTupleBuilder(btree.getFieldCount());
             updateBuffer.setFieldCount(btree.getFieldCount());
         } catch (Exception e) {
-            treeIndexOpHelper.deinit();
+            treeIndexOpHelper.close();
             throw new HyracksDataException(e);
         }
     }
@@ -214,7 +215,7 @@
         } catch (Exception e) {
             throw new HyracksDataException(e);
         } finally {
-            treeIndexOpHelper.deinit();
+            treeIndexOpHelper.close();
         }
     }
 
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopSetUnionOperatorNodePushable.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopSetUnionOperatorNodePushable.java
index 615a25b..579935b 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopSetUnionOperatorNodePushable.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/IndexNestedLoopSetUnionOperatorNodePushable.java
@@ -37,9 +37,10 @@
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.PermutingFrameTupleReference;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingFrameTupleReference;
 
 public class IndexNestedLoopSetUnionOperatorNodePushable extends AbstractUnaryInputUnaryOutputOperatorNodePushable {
     private TreeIndexDataflowHelper treeIndexOpHelper;
@@ -90,11 +91,11 @@
 
     @Override
     public void open() throws HyracksDataException {
-        accessor = new FrameTupleAccessor(treeIndexOpHelper.getHyracksTaskContext().getFrameSize(), recDesc);
+        accessor = new FrameTupleAccessor(treeIndexOpHelper.getTaskContext().getFrameSize(), recDesc);
 
         try {
-            treeIndexOpHelper.init(false);
-            btree = (BTree) treeIndexOpHelper.getIndex();
+            treeIndexOpHelper.open();
+            btree = (BTree) treeIndexOpHelper.getIndexInstance();
             cursorFrame = btree.getLeafFrameFactory().createFrame();
             setCursor();
             writer.open();
@@ -107,13 +108,13 @@
             }
             lowKeySearchCmp = new MultiComparator(lowKeySearchComparators);
 
-            writeBuffer = treeIndexOpHelper.getHyracksTaskContext().allocateFrame();
+            writeBuffer = treeIndexOpHelper.getTaskContext().allocateFrame();
             tb = new ArrayTupleBuilder(btree.getFieldCount());
             dos = tb.getDataOutput();
-            appender = new FrameTupleAppender(treeIndexOpHelper.getHyracksTaskContext().getFrameSize());
+            appender = new FrameTupleAppender(treeIndexOpHelper.getTaskContext().getFrameSize());
             appender.reset(writeBuffer, true);
 
-            indexAccessor = btree.createAccessor();
+            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
 
             /** set the search cursor */
             rangePred.setLowKey(null, true);
@@ -129,7 +130,7 @@
             }
 
         } catch (Exception e) {
-            treeIndexOpHelper.deinit();
+            treeIndexOpHelper.close();
             throw new HyracksDataException(e);
         }
     }
@@ -203,7 +204,7 @@
         } catch (Exception e) {
             throw new HyracksDataException(e);
         } finally {
-            treeIndexOpHelper.deinit();
+            treeIndexOpHelper.close();
         }
     }
 
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeIndexBulkReLoadOperatorDescriptor.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeIndexBulkReLoadOperatorDescriptor.java
index 126fcb8..eb5ece6 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeIndexBulkReLoadOperatorDescriptor.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeIndexBulkReLoadOperatorDescriptor.java
@@ -22,12 +22,12 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.file.TransientLocalResourceFactoryProvider;
 
 public class TreeIndexBulkReLoadOperatorDescriptor extends AbstractTreeIndexOperatorDescriptor {
 
@@ -35,20 +35,21 @@
 
     private final int[] fieldPermutation;
     private final IStorageManagerInterface storageManager;
-    private final IIndexRegistryProvider<IIndex> treeIndexRegistryProvider;
+    private final IIndexLifecycleManagerProvider lcManagerProvider;
     private final IFileSplitProvider fileSplitProvider;
     private final float fillFactor;
 
     public TreeIndexBulkReLoadOperatorDescriptor(JobSpecification spec, IStorageManagerInterface storageManager,
-            IIndexRegistryProvider<IIndex> treeIndexRegistryProvider, IFileSplitProvider fileSplitProvider,
+            IIndexLifecycleManagerProvider lcManagerProvider, IFileSplitProvider fileSplitProvider,
             ITypeTraits[] typeTraits, IBinaryComparatorFactory[] comparatorFactories, int[] fieldPermutation,
             float fillFactor, IIndexDataflowHelperFactory opHelperFactory) {
-        super(spec, 1, 0, null, storageManager, treeIndexRegistryProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, opHelperFactory, null, false, NoOpOperationCallbackProvider.INSTANCE);
+        super(spec, 1, 0, null, storageManager, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories,
+                fieldPermutation, opHelperFactory, null, false, new TransientLocalResourceFactoryProvider(),
+                NoOpOperationCallbackFactory.INSTANCE, NoOpOperationCallbackFactory.INSTANCE);
         this.fieldPermutation = fieldPermutation;
 
         this.storageManager = storageManager;
-        this.treeIndexRegistryProvider = treeIndexRegistryProvider;
+        this.lcManagerProvider = lcManagerProvider;
         this.fileSplitProvider = fileSplitProvider;
         this.fillFactor = fillFactor;
     }
@@ -57,6 +58,6 @@
     public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
             IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
         return new TreeIndexBulkReLoadOperatorNodePushable(this, ctx, partition, fieldPermutation, fillFactor,
-                recordDescProvider, storageManager, treeIndexRegistryProvider, fileSplitProvider);
+                recordDescProvider, storageManager, lcManagerProvider, fileSplitProvider);
     }
 }
\ No newline at end of file
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeIndexBulkReLoadOperatorNodePushable.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeIndexBulkReLoadOperatorNodePushable.java
index 883fef4..5e089a5 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeIndexBulkReLoadOperatorNodePushable.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeIndexBulkReLoadOperatorNodePushable.java
@@ -20,111 +20,54 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
 import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputSinkOperatorNodePushable;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoadContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexBulkLoader;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexRegistry;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.PermutingFrameTupleReference;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingFrameTupleReference;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
-import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
-import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
 public class TreeIndexBulkReLoadOperatorNodePushable extends AbstractUnaryInputSinkOperatorNodePushable {
-    private final TreeIndexDataflowHelper treeIndexOpHelper;
-    private FrameTupleAccessor accessor;
-    private IIndexBulkLoadContext bulkLoadCtx;
-
-    private IRecordDescriptorProvider recordDescProvider;
-    private PermutingFrameTupleReference tuple = new PermutingFrameTupleReference();
-
-    private final IStorageManagerInterface storageManager;
-    private final IIndexRegistryProvider<IIndex> treeIndexRegistryProvider;
-    private final IFileSplitProvider fileSplitProvider;
-    private final int partition;
     private final float fillFactor;
-    private IHyracksTaskContext ctx;
+    private final TreeIndexDataflowHelper treeIndexOpHelper;
+    private final IIndexOperatorDescriptor opDesc;
+    private final IRecordDescriptorProvider recordDescProvider;
+    private final PermutingFrameTupleReference tuple = new PermutingFrameTupleReference();
+
     private ITreeIndex index;
+    private FrameTupleAccessor accessor;
+    private IIndexBulkLoader bulkLoader;
 
     public TreeIndexBulkReLoadOperatorNodePushable(AbstractTreeIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
             int partition, int[] fieldPermutation, float fillFactor, IRecordDescriptorProvider recordDescProvider,
-            IStorageManagerInterface storageManager, IIndexRegistryProvider<IIndex> treeIndexRegistryProvider,
+            IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lcManagerProvider,
             IFileSplitProvider fileSplitProvider) {
+        this.fillFactor = fillFactor;
         treeIndexOpHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
                 opDesc, ctx, partition);
+        this.opDesc = opDesc;
         this.recordDescProvider = recordDescProvider;
         tuple.setFieldPermutation(fieldPermutation);
-
-        this.storageManager = storageManager;
-        this.treeIndexRegistryProvider = treeIndexRegistryProvider;
-        this.fileSplitProvider = fileSplitProvider;
-        this.partition = partition;
-        this.ctx = ctx;
-        this.fillFactor = fillFactor;
     }
 
     @Override
     public void open() throws HyracksDataException {
-        initDrop();
-        init();
-    }
-
-    private void initDrop() throws HyracksDataException {
-        try {
-            IndexRegistry<IIndex> treeIndexRegistry = treeIndexRegistryProvider.getRegistry(ctx);
-            IBufferCache bufferCache = storageManager.getBufferCache(ctx);
-            IFileMapProvider fileMapProvider = storageManager.getFileMapProvider(ctx);
-
-            FileReference f = fileSplitProvider.getFileSplits()[partition].getLocalFile();
-            int indexFileId = -1;
-            boolean fileIsMapped = false;
-            synchronized (fileMapProvider) {
-                fileIsMapped = fileMapProvider.isMapped(f);
-                if (fileIsMapped)
-                    indexFileId = fileMapProvider.lookupFileId(f);
-            }
-
-            /**
-             * delete the file if it is mapped
-             */
-            if (fileIsMapped) {
-                // Unregister tree instance.
-                synchronized (treeIndexRegistry) {
-                    treeIndexRegistry.unregister(indexFileId);
-                }
-
-                // remove name to id mapping
-                bufferCache.deleteFile(indexFileId, false);
-            }
-        }
-        // TODO: for the time being we don't throw,
-        // with proper exception handling (no hanging job problem) we should
-        // throw
-        catch (Exception e) {
-            throw new HyracksDataException(e);
-        }
-    }
-
-    private void init() throws HyracksDataException {
-        AbstractTreeIndexOperatorDescriptor opDesc = (AbstractTreeIndexOperatorDescriptor) treeIndexOpHelper
-                .getOperatorDescriptor();
         RecordDescriptor recDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
-        accessor = new FrameTupleAccessor(treeIndexOpHelper.getHyracksTaskContext().getFrameSize(), recDesc);
+        accessor = new FrameTupleAccessor(treeIndexOpHelper.getTaskContext().getFrameSize(), recDesc);
+        treeIndexOpHelper.create();
+        treeIndexOpHelper.open();
         try {
-            treeIndexOpHelper.init(true);
-            treeIndexOpHelper.getIndex().open(treeIndexOpHelper.getIndexFileId());
-            index = (ITreeIndex) treeIndexOpHelper.getIndex();
-            index.open(treeIndexOpHelper.getIndexFileId());
-            bulkLoadCtx = index.beginBulkLoad(fillFactor);
+            index = (ITreeIndex) treeIndexOpHelper.getIndexInstance();
+            bulkLoader = index.createBulkLoader(fillFactor, false, 0);
         } catch (Exception e) {
             // cleanup in case of failure
-            treeIndexOpHelper.deinit();
+            treeIndexOpHelper.close();
             throw new HyracksDataException(e);
         }
     }
@@ -135,16 +78,22 @@
         int tupleCount = accessor.getTupleCount();
         for (int i = 0; i < tupleCount; i++) {
             tuple.reset(accessor, i);
-            index.bulkLoadAddTuple(tuple, bulkLoadCtx);
+            try {
+                bulkLoader.add(tuple);
+            } catch (IndexException e) {
+                throw new HyracksDataException(e);
+            }
         }
     }
 
     @Override
     public void close() throws HyracksDataException {
         try {
-            index.endBulkLoad(bulkLoadCtx);
+            bulkLoader.end();
+        } catch (IndexException e) {
+            throw new HyracksDataException(e);
         } finally {
-            treeIndexOpHelper.deinit();
+            treeIndexOpHelper.close();
         }
     }
 
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/FunctionProxy.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/FunctionProxy.java
index 99bca1a..f75dab2 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/FunctionProxy.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/FunctionProxy.java
@@ -56,7 +56,7 @@
      * @throws HyracksDataException
      */
     public void functionOpen() throws HyracksDataException {
-        inputRd = inputRdFactory.createRecordDescriptor();
+        inputRd = inputRdFactory.createRecordDescriptor(ctx);
         tupleDe = new TupleDeserializer(inputRd);
         ctxCL = Thread.currentThread().getContextClassLoader();
         Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
diff --git a/pregelix/pregelix-dataflow/pom.xml b/pregelix/pregelix-dataflow/pom.xml
index ffc000b..8e2be08 100644
--- a/pregelix/pregelix-dataflow/pom.xml
+++ b/pregelix/pregelix-dataflow/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 
@@ -42,8 +42,9 @@
 				</configuration>
 			</plugin>
 			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
+				<version>2.4.1</version>
 				<configuration>
 					<filesets>
 						<fileset>
@@ -73,68 +74,68 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-api</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow-std-base</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-common</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-btree</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-ipc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/FinalAggregateOperatorDescriptor.java b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/FinalAggregateOperatorDescriptor.java
index eda7754..71592ee 100644
--- a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/FinalAggregateOperatorDescriptor.java
+++ b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/FinalAggregateOperatorDescriptor.java
@@ -56,11 +56,11 @@
     public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
             IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException {
         return new AbstractUnaryInputSinkOperatorNodePushable() {
-            private Configuration conf = confFactory.createConfiguration();
+            private Configuration conf = confFactory.createConfiguration(ctx);
             @SuppressWarnings("rawtypes")
             private GlobalAggregator aggregator = BspUtils.createGlobalAggregator(conf);
             private FrameTupleAccessor accessor = new FrameTupleAccessor(ctx.getFrameSize(),
-                    inputRdFactory.createRecordDescriptor());
+                    inputRdFactory.createRecordDescriptor(ctx));
             private ByteBufferInputStream inputStream = new ByteBufferInputStream();
             private DataInput input = new DataInputStream(inputStream);
             private Writable partialAggregateValue = BspUtils.createFinalAggregateValue(conf);
diff --git a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/HDFSFileWriteOperatorDescriptor.java b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/HDFSFileWriteOperatorDescriptor.java
index 2402748..1d9c778 100644
--- a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/HDFSFileWriteOperatorDescriptor.java
+++ b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/HDFSFileWriteOperatorDescriptor.java
@@ -75,14 +75,15 @@
             @Override
             public void open() throws HyracksDataException {
                 rd0 = inputRdFactory == null ? recordDescProvider.getInputRecordDescriptor(getActivityId(), 0)
-                        : inputRdFactory.createRecordDescriptor();
+                        : inputRdFactory.createRecordDescriptor(ctx);
                 frameDeserializer = new FrameDeserializer(ctx.getFrameSize(), rd0);
                 ctxCL = Thread.currentThread().getContextClassLoader();
                 Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
-                conf = confFactory.createConfiguration();
+                conf = confFactory.createConfiguration(ctx);
 
                 VertexOutputFormat outputFormat = BspUtils.createVertexOutputFormat(conf);
                 context = ctxFactory.createContext(conf, partition);
+                context.getConfiguration().setClassLoader(ctx.getJobletContext().getClassLoader());
                 try {
                     vertexWriter = outputFormat.createVertexWriter(context);
                 } catch (InterruptedException e) {
diff --git a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/MaterializingReadOperatorDescriptor.java b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/MaterializingReadOperatorDescriptor.java
index b1bb555..9a87f02 100644
--- a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/MaterializingReadOperatorDescriptor.java
+++ b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/MaterializingReadOperatorDescriptor.java
@@ -66,14 +66,7 @@
                     } catch (Exception e) {
                         writer.fail();
                         throw new HyracksDataException(e);
-                    } finally {
-                        /**
-                         * remove last iteration's state
-                         */
-                        IterationUtils.removeIterationState(ctx, partition);
-                        writer.close();
                     }
-                    complete = true;
                 }
             }
 
@@ -84,7 +77,12 @@
 
             @Override
             public void close() throws HyracksDataException {
-
+                /**
+                 * remove last iteration's state
+                 */
+                IterationUtils.removeIterationState(ctx, partition);
+                writer.close();
+                complete = true;
             }
         };
     }
diff --git a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/TerminationStateWriterOperatorDescriptor.java b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/TerminationStateWriterOperatorDescriptor.java
index 88a0dda..f54d176 100644
--- a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/TerminationStateWriterOperatorDescriptor.java
+++ b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/TerminationStateWriterOperatorDescriptor.java
@@ -45,10 +45,10 @@
     }
 
     @Override
-    public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
+    public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
             IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException {
         return new AbstractUnaryInputSinkOperatorNodePushable() {
-            private Configuration conf = confFactory.createConfiguration();
+            private Configuration conf = confFactory.createConfiguration(ctx);
             private boolean terminate = true;
 
             @Override
diff --git a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/VertexFileScanOperatorDescriptor.java b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/VertexFileScanOperatorDescriptor.java
index 0da7baf..343ba7e 100644
--- a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/VertexFileScanOperatorDescriptor.java
+++ b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/VertexFileScanOperatorDescriptor.java
@@ -81,15 +81,12 @@
         final List<FileSplit> splits = splitsFactory.getSplits();
 
         return new AbstractUnaryOutputSourceOperatorNodePushable() {
-            private ClassLoader ctxCL;
             private ContextFactory ctxFactory = new ContextFactory();
 
             @Override
             public void initialize() throws HyracksDataException {
-                ctxCL = Thread.currentThread().getContextClassLoader();
                 try {
-                    Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
-                    Configuration conf = confFactory.createConfiguration();
+                    Configuration conf = confFactory.createConfiguration(ctx);
                     writer.open();
                     for (int i = 0; i < scheduledLocations.length; i++) {
                         if (scheduledLocations[i].equals(ctx.getJobletContext().getApplicationContext().getNodeId())) {
@@ -109,8 +106,6 @@
                     writer.close();
                 } catch (Exception e) {
                     throw new HyracksDataException(e);
-                } finally {
-                    Thread.currentThread().setContextClassLoader(ctxCL);
                 }
             }
 
@@ -135,10 +130,11 @@
                 VertexInputFormat vertexInputFormat = BspUtils.createVertexInputFormat(conf);
                 InputSplit split = splits.get(splitId);
                 TaskAttemptContext mapperContext = ctxFactory.createContext(conf, splitId);
+                mapperContext.getConfiguration().setClassLoader(ctx.getJobletContext().getClassLoader());
 
                 VertexReader vertexReader = vertexInputFormat.createVertexReader(split, mapperContext);
                 vertexReader.initialize(split, mapperContext);
-                Vertex readerVertex = (Vertex) BspUtils.createVertex(conf);
+                Vertex readerVertex = (Vertex) BspUtils.createVertex(mapperContext.getConfiguration());
                 ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldSize);
                 DataOutput dos = tb.getDataOutput();
 
diff --git a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/VertexWriteOperatorDescriptor.java b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/VertexWriteOperatorDescriptor.java
index d7cbb3a..5da0239 100644
--- a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/VertexWriteOperatorDescriptor.java
+++ b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/VertexWriteOperatorDescriptor.java
@@ -64,7 +64,7 @@
             @Override
             public void open() throws HyracksDataException {
                 rd0 = inputRdFactory == null ? recordDescProvider.getInputRecordDescriptor(getActivityId(), 0)
-                        : inputRdFactory.createRecordDescriptor();
+                        : inputRdFactory.createRecordDescriptor(ctx);
                 frameDeserializer = new FrameDeserializer(ctx.getFrameSize(), rd0);
                 try {
                     outputWriter = new PrintWriter(new OutputStreamWriter(new FileOutputStream(splits[partition]
diff --git a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/base/IConfigurationFactory.java b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/base/IConfigurationFactory.java
index b31f376..2e58196 100644
--- a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/base/IConfigurationFactory.java
+++ b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/base/IConfigurationFactory.java
@@ -18,10 +18,11 @@
 
 import org.apache.hadoop.conf.Configuration;
 
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 
 public interface IConfigurationFactory extends Serializable {
 
-    public Configuration createConfiguration() throws HyracksDataException;
+    public Configuration createConfiguration(IHyracksTaskContext ctx) throws HyracksDataException;
 
 }
diff --git a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/context/RuntimeContext.java b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/context/RuntimeContext.java
index 567e220..8d6ab38 100644
--- a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/context/RuntimeContext.java
+++ b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/context/RuntimeContext.java
@@ -28,8 +28,8 @@
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.io.IWorkspaceFileFactory;
 import edu.uci.ics.hyracks.control.nc.io.IOManager;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexRegistry;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexLifecycleManager;
 import edu.uci.ics.hyracks.storage.common.buffercache.BufferCache;
 import edu.uci.ics.hyracks.storage.common.buffercache.ClockPageReplacementStrategy;
 import edu.uci.ics.hyracks.storage.common.buffercache.HeapBufferAllocator;
@@ -38,20 +38,25 @@
 import edu.uci.ics.hyracks.storage.common.buffercache.IPageReplacementStrategy;
 import edu.uci.ics.hyracks.storage.common.file.IFileMapManager;
 import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
-import edu.uci.ics.hyracks.storage.common.smi.TransientFileMapManager;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceRepository;
+import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactory;
+import edu.uci.ics.hyracks.storage.common.file.TransientFileMapManager;
+import edu.uci.ics.hyracks.storage.common.file.TransientLocalResourceRepository;
 import edu.uci.ics.pregelix.api.graph.Vertex;
 
 public class RuntimeContext implements IWorkspaceFileFactory {
     private static final Logger LOGGER = Logger.getLogger(RuntimeContext.class.getName());
 
-    private IndexRegistry<IIndex> treeIndexRegistry;
-    private IBufferCache bufferCache;
-    private IFileMapManager fileMapManager;
-    private Map<StateKey, IStateObject> appStateMap = new ConcurrentHashMap<StateKey, IStateObject>();
-    private Map<String, Long> giraphJobIdToSuperStep = new ConcurrentHashMap<String, Long>();
-    private Map<String, Boolean> giraphJobIdToMove = new ConcurrentHashMap<String, Boolean>();
-    private IOManager ioManager;
-    private Map<Long, List<FileReference>> iterationToFiles = new ConcurrentHashMap<Long, List<FileReference>>();
+    private final IIndexLifecycleManager lcManager;
+    private final ILocalResourceRepository localResourceRepository;
+    private final ResourceIdFactory resourceIdFactory;
+    private final IBufferCache bufferCache;
+    private final IFileMapManager fileMapManager;
+    private final Map<StateKey, IStateObject> appStateMap = new ConcurrentHashMap<StateKey, IStateObject>();
+    private final Map<String, Long> giraphJobIdToSuperStep = new ConcurrentHashMap<String, Long>();
+    private final Map<String, Boolean> giraphJobIdToMove = new ConcurrentHashMap<String, Boolean>();
+    private final IOManager ioManager;
+    private final Map<Long, List<FileReference>> iterationToFiles = new ConcurrentHashMap<Long, List<FileReference>>();
 
     public RuntimeContext(INCApplicationContext appCtx) {
         fileMapManager = new TransientFileMapManager();
@@ -64,8 +69,10 @@
         /** let the buffer cache never flush dirty pages */
         bufferCache = new BufferCache(appCtx.getRootContext().getIOManager(), allocator, prs,
                 new PreDelayPageCleanerPolicy(Long.MAX_VALUE), fileMapManager, pageSize, numPages, 1000000);
-        treeIndexRegistry = new IndexRegistry<IIndex>();
         ioManager = (IOManager) appCtx.getRootContext().getIOManager();
+        lcManager = new IndexLifecycleManager();
+        localResourceRepository = new TransientLocalResourceRepository();
+        resourceIdFactory = new ResourceIdFactory(0);
     }
 
     public void close() {
@@ -80,6 +87,18 @@
         System.gc();
     }
 
+    public ILocalResourceRepository getLocalResourceRepository() {
+        return localResourceRepository;
+    }
+
+    public ResourceIdFactory getResourceIdFactory() {
+        return resourceIdFactory;
+    }
+
+    public IIndexLifecycleManager getIndexLifecycleManager() {
+        return lcManager;
+    }
+
     public IBufferCache getBufferCache() {
         return bufferCache;
     }
@@ -88,10 +107,6 @@
         return fileMapManager;
     }
 
-    public IndexRegistry<IIndex> getTreeIndexRegistry() {
-        return treeIndexRegistry;
-    }
-
     public Map<StateKey, IStateObject> getAppStateStore() {
         return appStateMap;
     }
diff --git a/pregelix/pregelix-dist/pom.xml b/pregelix/pregelix-dist/pom.xml
index e9aef12..846ff66 100644
--- a/pregelix/pregelix-dist/pom.xml
+++ b/pregelix/pregelix-dist/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 	<artifactId>pregelix-dist</artifactId>
 	<name>pregelix-dist</name>
@@ -69,13 +69,13 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-core</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-example</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 		</dependency>
 	</dependencies>
 </project>
diff --git a/pregelix/pregelix-example/data/clique2/clique.txt b/pregelix/pregelix-example/data/clique2/clique.txt
new file mode 100755
index 0000000..68fbaea
--- /dev/null
+++ b/pregelix/pregelix-example/data/clique2/clique.txt
@@ -0,0 +1,6 @@
+1 2 3 4
+2 1 3
+3 1 2 4 5
+4 1 3
+5 3 6
+6 5
\ No newline at end of file
diff --git a/pregelix/pregelix-example/data/clique3/clique.txt b/pregelix/pregelix-example/data/clique3/clique.txt
new file mode 100755
index 0000000..ed0b7c1
--- /dev/null
+++ b/pregelix/pregelix-example/data/clique3/clique.txt
@@ -0,0 +1,20 @@
+0 1 19
+1 2 3 4 5 6 7 8 9
+2 1 3 4 5 6 7 8 9
+3 1 2 4 5 6 7 8 9
+4 1 2 3 5 6 7 8 9
+5 1 2 3 4 6 7 8 9
+6 1 2 3 4 5 7 8 9
+7 1 2 3 4 5 6 8 9
+8 1 2 3 4 5 6 7 9
+9 1 2 3 4 5 6 7 8 10
+10 9 11
+11 10 12 13 14 15 16 17 18 19
+12 11 13 14 15 16 17 18 19
+13 11 12 14 15 16 17 18 19
+14 11 12 13 15 16 17 18 19
+15 11 12 13 14 16 17 18 19
+16 11 12 13 14 15 17 18 19
+17 11 12 13 14 15 16 18 19
+18 11 12 13 14 15 16 17 19
+19 0 11 12 13 14 15 16 17 18
\ No newline at end of file
diff --git a/pregelix/pregelix-example/pom.xml b/pregelix/pregelix-example/pom.xml
index beefee2..7ca7e5d 100644
--- a/pregelix/pregelix-example/pom.xml
+++ b/pregelix/pregelix-example/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.4-SNAPSHOT</version>
+		<version>0.2.5-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -24,6 +24,7 @@
 			</plugin>
 			<plugin>
 				<artifactId>maven-assembly-plugin</artifactId>
+                <version>2.2-beta-5</version>
 				<configuration>
 					<descriptorRefs>
 						<descriptorRef>jar-with-dependencies</descriptorRef>
@@ -42,7 +43,7 @@
 			<plugin>
 				<groupId>org.codehaus.mojo</groupId>
 				<artifactId>appassembler-maven-plugin</artifactId>
-				<version>1.3</version>
+                <version>1.3</version>
 				<executions>
 					<execution>
 						<configuration>
@@ -68,7 +69,7 @@
 				<version>2.7.2</version>
 				<configuration>
 					<forkMode>pertest</forkMode>
-					<argLine>-enableassertions -Xmx512m -XX:MaxPermSize=300m -Dfile.encoding=UTF-8
+					<argLine>-enableassertions -Xmx2047m -XX:MaxPermSize=300m -Dfile.encoding=UTF-8
 						-Djava.util.logging.config.file=src/test/resources/logging.properties</argLine>
 					<includes>
 						<include>**/*TestSuite.java</include>
@@ -79,7 +80,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
+				<version>2.4.1</version>
 				<configuration>
 					<filesets>
 						<fileset>
@@ -104,7 +105,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-core</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/inputformat/TextPageRankInputFormat.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/inputformat/TextPageRankInputFormat.java
index a8a752e..8d0b776 100644
--- a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/inputformat/TextPageRankInputFormat.java
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/inputformat/TextPageRankInputFormat.java
@@ -39,7 +39,7 @@
     @Override
     public VertexReader<VLongWritable, DoubleWritable, FloatWritable, DoubleWritable> createVertexReader(
             InputSplit split, TaskAttemptContext context) throws IOException {
-        return new TextPageRankGraphReader(textInputFormat.createRecordReader(split, context));
+        return new TextPageRankGraphReader(textInputFormat.createRecordReader(split, context), context);
     }
 }
 
@@ -52,7 +52,7 @@
     private List<VLongWritable> pool = new ArrayList<VLongWritable>();
     private int used = 0;
 
-    public TextPageRankGraphReader(RecordReader<LongWritable, Text> lineRecordReader) {
+    public TextPageRankGraphReader(RecordReader<LongWritable, Text> lineRecordReader, TaskAttemptContext context) {
         super(lineRecordReader);
     }
 
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/maximalclique/CliquesWritable.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/maximalclique/CliquesWritable.java
index 0e22ea1..d2c5e6f 100644
--- a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/maximalclique/CliquesWritable.java
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/maximalclique/CliquesWritable.java
@@ -32,6 +32,7 @@
 
     private List<VLongWritable> cliques = new ArrayList<VLongWritable>();
     private int sizeOfClique = 0;
+    private VLongWritable srcId = new VLongWritable(0);
 
     public CliquesWritable(List<VLongWritable> cliques, int sizeOfClique) {
         this.cliques = cliques;
@@ -43,6 +44,16 @@
     }
 
     /**
+     * Set the srcId
+     * 
+     * @param srcId
+     *            the source vertex Id
+     */
+    public void setSrcId(VLongWritable srcId) {
+        this.srcId = srcId;
+    }
+
+    /**
      * Set the size of cliques.
      * 
      * @param sizeOfClique
@@ -103,6 +114,11 @@
                 cliques.add(vid);
             }
         }
+
+        if (srcId == null) {
+            srcId = new VLongWritable();
+        }
+        srcId.readFields(input);
     }
 
     @Override
@@ -117,6 +133,8 @@
         for (int i = 0; i < cliques.size(); i++) {
             cliques.get(i).write(output);
         }
+
+        srcId.write(output);
     }
 
     @Override
@@ -126,11 +144,14 @@
         StringBuffer sb = new StringBuffer();
         int numCliques = cliques.size() / sizeOfClique;
         for (int i = 0; i < numCliques; i++) {
+            sb.append(srcId);
+            sb.append(",");
+            int start = i * sizeOfClique;
             for (int j = 0; j < sizeOfClique - 1; j++) {
-                sb.append(cliques.get(j));
+                sb.append(cliques.get(start + j));
                 sb.append(",");
             }
-            sb.append(cliques.get(sizeOfClique - 1));
+            sb.append(cliques.get(start + sizeOfClique - 1));
             sb.append(";");
         }
         return sb.toString();
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/maximalclique/MaximalCliqueVertex.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/maximalclique/MaximalCliqueVertex.java
index 266feb7..85a139e 100644
--- a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/maximalclique/MaximalCliqueVertex.java
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/maximalclique/MaximalCliqueVertex.java
@@ -44,8 +44,8 @@
 
 /**
  * The maximal clique example -- find maximal cliques in an undirected graph.
- * The result cliques contains vertexes ordered by the vertex id ascendingly. The algorithm takes
- * advantage of that property to do effective pruning.
+ * The result cliques contains vertexes ordered by the vertex id ascendingly.
+ * The algorithm takes advantage of that property to do effective pruning.
  */
 public class MaximalCliqueVertex extends Vertex<VLongWritable, CliquesWritable, NullWritable, AdjacencyListWritable> {
 
@@ -55,7 +55,7 @@
     private int largestCliqueSizeSoFar = 0;
     private List<BitSet> currentMaximalCliques = new ArrayList<BitSet>();
     private CliquesWritable tmpValue = new CliquesWritable();
-    private List<VLongWritable> cliques = new ArrayList<VLongWritable>();
+    private List<VLongWritable> cliqueList = new ArrayList<VLongWritable>();
 
     /**
      * Update the current maximal cliques
@@ -68,7 +68,6 @@
         vertexList.clear();
         invertedMap.clear();
         currentMaximalCliques.clear();
-        cliques.clear();
         tmpValue.reset();
 
         // build the initial sub graph
@@ -76,8 +75,6 @@
             AdjacencyListWritable adj = values.next();
             map.put(adj.getSource(), adj);
         }
-        VLongWritable srcId = getVertexId();
-        map.put(srcId, new AdjacencyListWritable());
 
         // build the vertex list (vertex id in ascending order) and the inverted list of vertexes
         int i = 0;
@@ -86,12 +83,14 @@
             invertedMap.put(v, i++);
         }
 
-        //clean up adjacency list --- remove vertexes who are not neighbors of key
+        // clean up adjacency list --- remove vertexes who are not neighbors of
+        // key
         for (AdjacencyListWritable adj : map.values()) {
             adj.cleanNonMatch(vertexList);
         }
 
-        // get the h-index of the subgraph --- which is the maximum depth to explore
+        // get the h-index of the subgraph --- which is the maximum depth to
+        // explore
         int[] neighborCounts = new int[map.size()];
         i = 0;
         for (AdjacencyListWritable adj : map.values()) {
@@ -105,11 +104,13 @@
             }
             h++;
         }
-        if (h < largestCliqueSizeSoFar) {
+
+        // the clique size is upper-bounded by h+1
+        if (h + 1 < largestCliqueSizeSoFar) {
             return;
         }
 
-        //start depth-first search
+        // start depth-first search
         BitSet cliqueSoFar = new BitSet(h);
         for (VLongWritable v : vertexList) {
             cliqueSoFar.set(invertedMap.get(v));
@@ -117,16 +118,15 @@
             cliqueSoFar.clear();
         }
 
-        //output local maximal cliques
+        // output local maximal cliques
+        tmpValue.setSrcId(getVertexId());
         for (BitSet clique : currentMaximalCliques) {
-            int keyIndex = invertedMap.get(srcId);
-            clique.set(keyIndex);
             generateClique(clique);
-            tmpValue.addCliques(cliques);
+            tmpValue.addCliques(cliqueList);
             tmpValue.setCliqueSize(clique.cardinality());
         }
 
-        //update the vertex state
+        // update the vertex state
         setVertexValue(tmpValue);
     }
 
@@ -136,13 +136,15 @@
      * @param clique
      *            the bitmap representation of a clique
      */
-    private void generateClique(BitSet clique) {
+    private List<VLongWritable> generateClique(BitSet clique) {
+        cliqueList.clear();
         for (int j = 0; j < clique.length();) {
             j = clique.nextSetBit(j);
             VLongWritable v = vertexList.get(j);
-            cliques.add(v);
+            cliqueList.add(v);
             j++;
         }
+        return cliqueList;
     }
 
     /**
@@ -170,7 +172,7 @@
         while (neighbors.hasNext()) {
             VLongWritable neighbor = neighbors.next();
             if (!isTested(neighbor, cliqueSoFar) && isClique(neighbor, cliqueSoFar)) {
-                //snapshot the clique
+                // snapshot the clique
                 int cliqueLength = cliqueSoFar.length();
                 // expand the clique
                 cliqueSoFar.set(invertedMap.get(neighbor));
@@ -217,7 +219,8 @@
         int largestSetIndex = cliqueSoFar.length() - 1;
         if (index > largestSetIndex) {
             // we only return cliques with vertexes in the ascending order
-            // hence, the new vertex must be larger than the largesetSetIndex in the clique
+            // hence, the new vertex must be larger than the largesetSetIndex in
+            // the clique
             return false;
         } else {
             // otherwise, we think the vertex is "tested"
@@ -236,7 +239,8 @@
      */
     private boolean isClique(VLongWritable newVertex, BitSet cliqueSoFar) {
         AdjacencyListWritable adj = map.get(newVertex);
-        // check whether each existing vertex is in the neighbor set of newVertex
+        // check whether each existing vertex is in the neighbor set of
+        // newVertex
         for (int i = 0; i < cliqueSoFar.length();) {
             i = cliqueSoFar.nextSetBit(i);
             VLongWritable v = vertexList.get(i);
@@ -249,9 +253,8 @@
     }
 
     /**
-     * For superstep 1, send outgoing mesages.
-     * For superstep 2, calculate maximal cliques.
-     * otherwise, vote to halt.
+     * For superstep 1, send outgoing mesages. For superstep 2, calculate
+     * maximal cliques. otherwise, vote to halt.
      */
     @Override
     public void compute(Iterator<AdjacencyListWritable> msgIterator) {
@@ -300,9 +303,11 @@
     private void sendOutgoingMsgs(List<Edge<VLongWritable, NullWritable>> edges) {
         for (int i = 0; i < edges.size(); i++) {
             if (edges.get(i).getDestVertexId().get() < getVertexId().get()) {
-                // only add emit for the vertexes whose id is smaller than the vertex id 
+                // only add emit for the vertexes whose id is smaller than the
+                // vertex id
                 // to avoid the duplicate removal step,
-                // because all the resulting cliques will have vertexes in the ascending order.
+                // because all the resulting cliques will have vertexes in the
+                // ascending order.
                 AdjacencyListWritable msg = new AdjacencyListWritable();
                 msg.setSource(getVertexId());
                 for (int j = i + 1; j < edges.size(); j++) {
diff --git a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/dataload/DataLoadTest.java b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/dataload/DataLoadTest.java
index 321b5b2..d6d9fe3 100644
--- a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/dataload/DataLoadTest.java
+++ b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/dataload/DataLoadTest.java
@@ -77,7 +77,6 @@
         ClusterConfig.setClusterPropertiesPath(PATH_TO_CLUSTER_PROPERTIES);
         cleanupStores();
         PregelixHyracksIntegrationUtil.init("src/test/resources/topology.xml");
-        PregelixHyracksIntegrationUtil.createApp(HYRACKS_APP_NAME);
         LOGGER.info("Hyracks mini-cluster started");
         startHDFS();
         FileUtils.forceMkdir(new File(EXPECT_RESULT_DIR));
@@ -112,7 +111,6 @@
     }
 
     public void tearDown() throws Exception {
-        PregelixHyracksIntegrationUtil.destroyApp(HYRACKS_APP_NAME);
         PregelixHyracksIntegrationUtil.deinit();
         LOGGER.info("Hyracks mini-cluster shut down");
         cleanupHDFS();
diff --git a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobgen/JobGenerator.java b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobgen/JobGenerator.java
index ca5a1c4..0a5b214 100644
--- a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobgen/JobGenerator.java
+++ b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobgen/JobGenerator.java
@@ -55,6 +55,8 @@
     private static String HDFS_OUTPUTPAH2 = "/resultcomplex";
 
     private static String HDFS_INPUTPATH3 = "/clique";
+    private static String HDFS_INPUTPATH4 = "/clique2";
+    private static String HDFS_INPUTPATH5 = "/clique3";
     private static String HDFS_OUTPUTPAH3 = "/resultclique";
 
     private static void generatePageRankJobReal(String jobName, String outputPath) throws IOException {
@@ -218,6 +220,30 @@
         FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH3));
         job.getConfiguration().writeXml(new FileOutputStream(new File(outputPath)));
     }
+    
+    private static void generateMaximalCliqueJob2(String jobName, String outputPath) throws IOException {
+        PregelixJob job = new PregelixJob(jobName);
+        job.setVertexClass(MaximalCliqueVertex.class);
+        job.setGlobalAggregatorClass(MaximalCliqueAggregator.class);
+        job.setDynamicVertexValueSize(true);
+        job.setVertexInputFormatClass(TextMaximalCliqueInputFormat.class);
+        job.setVertexOutputFormatClass(MaximalCliqueVertexOutputFormat.class);
+        FileInputFormat.setInputPaths(job, HDFS_INPUTPATH4);
+        FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH3));
+        job.getConfiguration().writeXml(new FileOutputStream(new File(outputPath)));
+    }
+    
+    private static void generateMaximalCliqueJob3(String jobName, String outputPath) throws IOException {
+        PregelixJob job = new PregelixJob(jobName);
+        job.setVertexClass(MaximalCliqueVertex.class);
+        job.setGlobalAggregatorClass(MaximalCliqueAggregator.class);
+        job.setDynamicVertexValueSize(true);
+        job.setVertexInputFormatClass(TextMaximalCliqueInputFormat.class);
+        job.setVertexOutputFormatClass(MaximalCliqueVertexOutputFormat.class);
+        FileInputFormat.setInputPaths(job, HDFS_INPUTPATH5);
+        FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH3));
+        job.getConfiguration().writeXml(new FileOutputStream(new File(outputPath)));
+    }
 
     private static void generateGraphMutationJob(String jobName, String outputPath) throws IOException {
         PregelixJob job = new PregelixJob(jobName);
@@ -261,6 +287,8 @@
 
     private static void genMaximalClique() throws IOException {
         generateMaximalCliqueJob("Maximal Clique", outputBase + "MaximalClique.xml");
+        generateMaximalCliqueJob2("Maximal Clique 2", outputBase + "MaximalClique2.xml");
+        generateMaximalCliqueJob3("Maximal Clique 3", outputBase + "MaximalClique3.xml");
     }
 
     private static void genGraphMutation() throws IOException {
diff --git a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestCase.java b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestCase.java
index 5a556fa..00f6f54 100644
--- a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestCase.java
+++ b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestCase.java
@@ -25,20 +25,13 @@
 import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
 import org.junit.Test;
 
-import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.pregelix.api.job.PregelixJob;
-import edu.uci.ics.pregelix.core.jobgen.JobGen;
-import edu.uci.ics.pregelix.core.jobgen.JobGenInnerJoin;
-import edu.uci.ics.pregelix.core.jobgen.JobGenOuterJoin;
-import edu.uci.ics.pregelix.core.jobgen.JobGenOuterJoinSingleSort;
-import edu.uci.ics.pregelix.core.jobgen.JobGenOuterJoinSort;
+import edu.uci.ics.pregelix.core.base.IDriver.Plan;
+import edu.uci.ics.pregelix.core.driver.Driver;
 import edu.uci.ics.pregelix.core.util.PregelixHyracksIntegrationUtil;
-import edu.uci.ics.pregelix.dataflow.util.IterationUtils;
 import edu.uci.ics.pregelix.example.util.TestUtils;
 
 public class RunJobTestCase extends TestCase {
-    private static final String NC1 = "nc1";
-    private static final String HYRACKS_APP_NAME = "pregelix";
     private static String HDFS_INPUTPATH = "/webmap";
     private static String HDFS_OUTPUTPAH = "/result";
 
@@ -48,14 +41,21 @@
     private static String HDFS_INPUTPATH3 = "/clique";
     private static String HDFS_OUTPUTPAH3 = "/resultclique";
 
-    private final PregelixJob job;
-    private JobGen[] giraphJobGens;
-    private final String resultFileName;
-    private final String expectedFileName;
-    private final String jobFile;
+    private static String HDFS_INPUTPATH4 = "/clique2";
+    private static String HDFS_OUTPUTPAH4 = "/resultclique";
 
-    public RunJobTestCase(String hadoopConfPath, String jobName, String jobFile, String resultFile, String expectedFile)
-            throws Exception {
+    private static String HDFS_INPUTPATH5 = "/clique3";
+    private static String HDFS_OUTPUTPAH5 = "/resultclique";
+
+    private final PregelixJob job;
+    private final String resultFileDir;
+    private final String expectedFileDir;
+    private final String jobFile;
+    private final Driver driver = new Driver(this.getClass());
+    private final FileSystem dfs;
+
+    public RunJobTestCase(String hadoopConfPath, String jobName, String jobFile, String resultFile,
+            String expectedFile, FileSystem dfs) throws Exception {
         super("test");
         this.jobFile = jobFile;
         this.job = new PregelixJob("test");
@@ -68,21 +68,20 @@
         } else if (inputPaths[0].toString().endsWith(HDFS_INPUTPATH2)) {
             FileInputFormat.setInputPaths(job, HDFS_INPUTPATH2);
             FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH2));
-        } else {
+        } else if (inputPaths[0].toString().endsWith(HDFS_INPUTPATH3)) {
             FileInputFormat.setInputPaths(job, HDFS_INPUTPATH3);
             FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH3));
+        } else if (inputPaths[0].toString().endsWith(HDFS_INPUTPATH4)) {
+            FileInputFormat.setInputPaths(job, HDFS_INPUTPATH4);
+            FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH4));
+        } else if (inputPaths[0].toString().endsWith(HDFS_INPUTPATH5)) {
+            FileInputFormat.setInputPaths(job, HDFS_INPUTPATH5);
+            FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH5));
         }
         job.setJobName(jobName);
-        this.resultFileName = resultFile;
-        this.expectedFileName = expectedFile;
-        giraphJobGens = new JobGen[4];
-        giraphJobGens[0] = new JobGenOuterJoin(job);
-        waitawhile();
-        giraphJobGens[1] = new JobGenInnerJoin(job);
-        waitawhile();
-        giraphJobGens[2] = new JobGenOuterJoinSort(job);
-        waitawhile();
-        giraphJobGens[3] = new JobGenOuterJoinSingleSort(job);
+        this.resultFileDir = resultFile;
+        this.expectedFileDir = expectedFile;
+        this.dfs = dfs;
     }
 
     private void waitawhile() throws InterruptedException {
@@ -94,89 +93,19 @@
     @Test
     public void test() throws Exception {
         setUp();
-        for (JobGen jobGen : giraphJobGens) {
-            FileSystem dfs = FileSystem.get(job.getConfiguration());
-            dfs.delete(new Path(HDFS_OUTPUTPAH), true);
-            runCreate(jobGen);
-            runDataLoad(jobGen);
-            int i = 1;
-            boolean terminate = false;
-            do {
-                runLoopBodyIteration(jobGen, i);
-                terminate = IterationUtils.readTerminationState(job.getConfiguration(), jobGen.getJobId());
-                i++;
-            } while (!terminate);
-            runIndexScan(jobGen);
-            runHDFSWRite(jobGen);
-            runCleanup(jobGen);
-            compareResults();
+        Plan[] plans = new Plan[] { Plan.OUTER_JOIN };
+        for (Plan plan : plans) {
+            driver.runJob(job, plan, PregelixHyracksIntegrationUtil.CC_HOST,
+                    PregelixHyracksIntegrationUtil.TEST_HYRACKS_CC_CLIENT_PORT, false);
         }
+        compareResults();
         tearDown();
         waitawhile();
     }
 
-    private void runCreate(JobGen jobGen) throws Exception {
-        try {
-            JobSpecification treeCreateJobSpec = jobGen.generateCreatingJob();
-            PregelixHyracksIntegrationUtil.runJob(treeCreateJobSpec, HYRACKS_APP_NAME);
-        } catch (Exception e) {
-            throw e;
-        }
-    }
-
-    private void runDataLoad(JobGen jobGen) throws Exception {
-        try {
-            JobSpecification bulkLoadJobSpec = jobGen.generateLoadingJob();
-            PregelixHyracksIntegrationUtil.runJob(bulkLoadJobSpec, HYRACKS_APP_NAME);
-        } catch (Exception e) {
-            throw e;
-        }
-    }
-
-    private void runLoopBodyIteration(JobGen jobGen, int iteration) throws Exception {
-        try {
-            JobSpecification loopBody = jobGen.generateJob(iteration);
-            PregelixHyracksIntegrationUtil.runJob(loopBody, HYRACKS_APP_NAME);
-        } catch (Exception e) {
-            throw e;
-        }
-    }
-
-    private void runIndexScan(JobGen jobGen) throws Exception {
-        try {
-            JobSpecification scanSortPrintJobSpec = jobGen.scanIndexPrintGraph(NC1, resultFileName);
-            PregelixHyracksIntegrationUtil.runJob(scanSortPrintJobSpec, HYRACKS_APP_NAME);
-        } catch (Exception e) {
-            throw e;
-        }
-    }
-
-    private void runHDFSWRite(JobGen jobGen) throws Exception {
-        try {
-            JobSpecification scanSortPrintJobSpec = jobGen.scanIndexWriteGraph();
-            PregelixHyracksIntegrationUtil.runJob(scanSortPrintJobSpec, HYRACKS_APP_NAME);
-        } catch (Exception e) {
-            throw e;
-        }
-    }
-
-    private void runCleanup(JobGen jobGen) throws Exception {
-        try {
-            JobSpecification[] cleanups = jobGen.generateCleanup();
-            runJobArray(cleanups);
-        } catch (Exception e) {
-            throw e;
-        }
-    }
-
-    private void runJobArray(JobSpecification[] jobs) throws Exception {
-        for (JobSpecification job : jobs) {
-            PregelixHyracksIntegrationUtil.runJob(job, HYRACKS_APP_NAME);
-        }
-    }
-
     private void compareResults() throws Exception {
-        TestUtils.compareWithResult(new File(resultFileName), new File(expectedFileName));
+        dfs.copyToLocalFile(FileOutputFormat.getOutputPath(job), new Path(resultFileDir));
+        TestUtils.compareWithResultDir(new File(expectedFileDir), new File(resultFileDir));
     }
 
     public String toString() {
diff --git a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestSuite.java b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestSuite.java
index fa98ebd..14d7718 100644
--- a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestSuite.java
+++ b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestSuite.java
@@ -41,176 +41,181 @@
 
 @SuppressWarnings("deprecation")
 public class RunJobTestSuite extends TestSuite {
-	private static final Logger LOGGER = Logger.getLogger(RunJobTestSuite.class
-			.getName());
+    private static final Logger LOGGER = Logger.getLogger(RunJobTestSuite.class.getName());
 
-	private static final String ACTUAL_RESULT_DIR = "actual";
-	private static final String EXPECTED_RESULT_DIR = "src/test/resources/expected";
-	private static final String PATH_TO_HADOOP_CONF = "src/test/resources/hadoop/conf";
-	private static final String PATH_TO_CLUSTER_STORE = "src/test/resources/cluster/stores.properties";
-	private static final String PATH_TO_CLUSTER_PROPERTIES = "src/test/resources/cluster/cluster.properties";
-	private static final String PATH_TO_JOBS = "src/test/resources/jobs/";
-	private static final String PATH_TO_IGNORE = "src/test/resources/ignore.txt";
-	private static final String PATH_TO_ONLY = "src/test/resources/only.txt";
-	private static final String FILE_EXTENSION_OF_RESULTS = "result";
+    private static final String ACTUAL_RESULT_DIR = "actual";
+    private static final String EXPECTED_RESULT_DIR = "src/test/resources/expected";
+    private static final String PATH_TO_HADOOP_CONF = "src/test/resources/hadoop/conf";
+    private static final String PATH_TO_CLUSTER_STORE = "src/test/resources/cluster/stores.properties";
+    private static final String PATH_TO_CLUSTER_PROPERTIES = "src/test/resources/cluster/cluster.properties";
+    private static final String PATH_TO_JOBS = "src/test/resources/jobs/";
+    private static final String PATH_TO_IGNORE = "src/test/resources/ignore.txt";
+    private static final String PATH_TO_ONLY = "src/test/resources/only.txt";
 
-	private static final String DATA_PATH = "data/webmap/webmap_link.txt";
-	private static final String HDFS_PATH = "/webmap/";
+    private static final String DATA_PATH = "data/webmap/webmap_link.txt";
+    private static final String HDFS_PATH = "/webmap/";
 
-	private static final String DATA_PATH2 = "data/webmapcomplex/webmap_link.txt";
-	private static final String HDFS_PATH2 = "/webmapcomplex/";
+    private static final String DATA_PATH2 = "data/webmapcomplex/webmap_link.txt";
+    private static final String HDFS_PATH2 = "/webmapcomplex/";
 
-	private static final String DATA_PATH3 = "data/clique/clique.txt";
-	private static final String HDFS_PATH3 = "/clique/";
+    private static final String DATA_PATH3 = "data/clique/clique.txt";
+    private static final String HDFS_PATH3 = "/clique/";
 
-	private static final String HYRACKS_APP_NAME = "pregelix";
-	private static final String HADOOP_CONF_PATH = ACTUAL_RESULT_DIR
-			+ File.separator + "conf.xml";
-	private MiniDFSCluster dfsCluster;
+    private static final String DATA_PATH4 = "data/clique2/clique.txt";
+    private static final String HDFS_PATH4 = "/clique2/";
 
-	private JobConf conf = new JobConf();
-	private int numberOfNC = 2;
+    private static final String DATA_PATH5 = "data/clique3/clique.txt";
+    private static final String HDFS_PATH5 = "/clique3/";
 
-	public void setUp() throws Exception {
-		ClusterConfig.setStorePath(PATH_TO_CLUSTER_STORE);
-		ClusterConfig.setClusterPropertiesPath(PATH_TO_CLUSTER_PROPERTIES);
-		cleanupStores();
-		PregelixHyracksIntegrationUtil.init("src/test/resources/topology.xml");
-		PregelixHyracksIntegrationUtil.createApp(HYRACKS_APP_NAME);
-		LOGGER.info("Hyracks mini-cluster started");
-		FileUtils.forceMkdir(new File(ACTUAL_RESULT_DIR));
-		FileUtils.cleanDirectory(new File(ACTUAL_RESULT_DIR));
-		startHDFS();
-	}
+    private static final String HADOOP_CONF_PATH = ACTUAL_RESULT_DIR + File.separator + "conf.xml";
+    private MiniDFSCluster dfsCluster;
 
-	private void cleanupStores() throws IOException {
-		FileUtils.forceMkdir(new File("teststore"));
-		FileUtils.forceMkdir(new File("build"));
-		FileUtils.cleanDirectory(new File("teststore"));
-		FileUtils.cleanDirectory(new File("build"));
-	}
+    private JobConf conf = new JobConf();
+    private int numberOfNC = 2;
 
-	private void startHDFS() throws IOException {
-		conf.addResource(new Path(PATH_TO_HADOOP_CONF + "/core-site.xml"));
-		conf.addResource(new Path(PATH_TO_HADOOP_CONF + "/mapred-site.xml"));
-		conf.addResource(new Path(PATH_TO_HADOOP_CONF + "/hdfs-site.xml"));
-		FileSystem lfs = FileSystem.getLocal(new Configuration());
-		lfs.delete(new Path("build"), true);
-		System.setProperty("hadoop.log.dir", "logs");
-		dfsCluster = new MiniDFSCluster(conf, numberOfNC, true, null);
-		FileSystem dfs = FileSystem.get(conf);
-		Path src = new Path(DATA_PATH);
-		Path dest = new Path(HDFS_PATH);
-		dfs.mkdirs(dest);
-		dfs.copyFromLocalFile(src, dest);
+    public void setUp() throws Exception {
+        ClusterConfig.setStorePath(PATH_TO_CLUSTER_STORE);
+        ClusterConfig.setClusterPropertiesPath(PATH_TO_CLUSTER_PROPERTIES);
+        cleanupStores();
+        PregelixHyracksIntegrationUtil.init("src/test/resources/topology.xml");
+        LOGGER.info("Hyracks mini-cluster started");
+        FileUtils.forceMkdir(new File(ACTUAL_RESULT_DIR));
+        FileUtils.cleanDirectory(new File(ACTUAL_RESULT_DIR));
+        startHDFS();
+    }
 
-		src = new Path(DATA_PATH2);
-		dest = new Path(HDFS_PATH2);
-		dfs.mkdirs(dest);
-		dfs.copyFromLocalFile(src, dest);
+    private void cleanupStores() throws IOException {
+        FileUtils.forceMkdir(new File("teststore"));
+        FileUtils.forceMkdir(new File("build"));
+        FileUtils.cleanDirectory(new File("teststore"));
+        FileUtils.cleanDirectory(new File("build"));
+    }
 
-		src = new Path(DATA_PATH3);
-		dest = new Path(HDFS_PATH3);
-		dfs.mkdirs(dest);
-		dfs.copyFromLocalFile(src, dest);
+    private void startHDFS() throws IOException {
+        conf.addResource(new Path(PATH_TO_HADOOP_CONF + "/core-site.xml"));
+        conf.addResource(new Path(PATH_TO_HADOOP_CONF + "/mapred-site.xml"));
+        conf.addResource(new Path(PATH_TO_HADOOP_CONF + "/hdfs-site.xml"));
+        FileSystem lfs = FileSystem.getLocal(new Configuration());
+        lfs.delete(new Path("build"), true);
+        System.setProperty("hadoop.log.dir", "logs");
+        dfsCluster = new MiniDFSCluster(conf, numberOfNC, true, null);
+        FileSystem dfs = FileSystem.get(conf);
+        Path src = new Path(DATA_PATH);
+        Path dest = new Path(HDFS_PATH);
+        dfs.mkdirs(dest);
+        dfs.copyFromLocalFile(src, dest);
 
-		DataOutputStream confOutput = new DataOutputStream(
-				new FileOutputStream(new File(HADOOP_CONF_PATH)));
-		conf.writeXml(confOutput);
-		confOutput.flush();
-		confOutput.close();
-	}
+        src = new Path(DATA_PATH2);
+        dest = new Path(HDFS_PATH2);
+        dfs.mkdirs(dest);
+        dfs.copyFromLocalFile(src, dest);
 
-	/**
-	 * cleanup hdfs cluster
-	 */
-	private void cleanupHDFS() throws Exception {
-		dfsCluster.shutdown();
-	}
+        src = new Path(DATA_PATH3);
+        dest = new Path(HDFS_PATH3);
+        dfs.mkdirs(dest);
+        dfs.copyFromLocalFile(src, dest);
 
-	public void tearDown() throws Exception {
-		PregelixHyracksIntegrationUtil.destroyApp(HYRACKS_APP_NAME);
-		PregelixHyracksIntegrationUtil.deinit();
-		LOGGER.info("Hyracks mini-cluster shut down");
-		cleanupHDFS();
-	}
+        src = new Path(DATA_PATH4);
+        dest = new Path(HDFS_PATH4);
+        dfs.mkdirs(dest);
+        dfs.copyFromLocalFile(src, dest);
 
-	public static Test suite() throws Exception {
-		List<String> ignores = getFileList(PATH_TO_IGNORE);
-		List<String> onlys = getFileList(PATH_TO_ONLY);
-		File testData = new File(PATH_TO_JOBS);
-		File[] queries = testData.listFiles();
-		RunJobTestSuite testSuite = new RunJobTestSuite();
-		testSuite.setUp();
-		boolean onlyEnabled = false;
+        src = new Path(DATA_PATH5);
+        dest = new Path(HDFS_PATH5);
+        dfs.mkdirs(dest);
+        dfs.copyFromLocalFile(src, dest);
 
-		if (onlys.size() > 0) {
-			onlyEnabled = true;
-		}
-		for (File qFile : queries) {
-			if (isInList(ignores, qFile.getName()))
-				continue;
+        DataOutputStream confOutput = new DataOutputStream(new FileOutputStream(new File(HADOOP_CONF_PATH)));
+        conf.writeXml(confOutput);
+        confOutput.flush();
+        confOutput.close();
+    }
 
-			if (qFile.isFile()) {
-				if (onlyEnabled && !isInList(onlys, qFile.getName())) {
-					continue;
-				} else {
-					String resultFileName = ACTUAL_RESULT_DIR + File.separator
-							+ jobExtToResExt(qFile.getName());
-					String expectedFileName = EXPECTED_RESULT_DIR
-							+ File.separator + jobExtToResExt(qFile.getName());
-					testSuite.addTest(new RunJobTestCase(HADOOP_CONF_PATH,
-							qFile.getName(),
-							qFile.getAbsolutePath().toString(), resultFileName,
-							expectedFileName));
-				}
-			}
-		}
-		return testSuite;
-	}
+    /**
+     * cleanup hdfs cluster
+     */
+    private void cleanupHDFS() throws Exception {
+        dfsCluster.shutdown();
+    }
 
-	/**
-	 * Runs the tests and collects their result in a TestResult.
-	 */
-	@Override
-	public void run(TestResult result) {
-		try {
-			int testCount = countTestCases();
-			for (int i = 0; i < testCount; i++) {
-				// cleanupStores();
-				Test each = this.testAt(i);
-				if (result.shouldStop())
-					break;
-				runTest(each, result);
-			}
-			tearDown();
-		} catch (Exception e) {
-			throw new IllegalStateException(e);
-		}
-	}
+    public void tearDown() throws Exception {
+        PregelixHyracksIntegrationUtil.deinit();
+        LOGGER.info("Hyracks mini-cluster shut down");
+        cleanupHDFS();
+    }
 
-	protected static List<String> getFileList(String ignorePath)
-			throws FileNotFoundException, IOException {
-		BufferedReader reader = new BufferedReader(new FileReader(ignorePath));
-		String s = null;
-		List<String> ignores = new ArrayList<String>();
-		while ((s = reader.readLine()) != null) {
-			ignores.add(s);
-		}
-		reader.close();
-		return ignores;
-	}
+    public static Test suite() throws Exception {
+        List<String> ignores = getFileList(PATH_TO_IGNORE);
+        List<String> onlys = getFileList(PATH_TO_ONLY);
+        File testData = new File(PATH_TO_JOBS);
+        File[] queries = testData.listFiles();
+        RunJobTestSuite testSuite = new RunJobTestSuite();
+        testSuite.setUp();
+        boolean onlyEnabled = false;
+        FileSystem dfs = FileSystem.get(testSuite.conf);
 
-	private static String jobExtToResExt(String fname) {
-		int dot = fname.lastIndexOf('.');
-		return fname.substring(0, dot + 1) + FILE_EXTENSION_OF_RESULTS;
-	}
+        if (onlys.size() > 0) {
+            onlyEnabled = true;
+        }
+        for (File qFile : queries) {
+            if (isInList(ignores, qFile.getName()))
+                continue;
 
-	private static boolean isInList(List<String> onlys, String name) {
-		for (String only : onlys)
-			if (name.indexOf(only) >= 0)
-				return true;
-		return false;
-	}
+            if (qFile.isFile()) {
+                if (onlyEnabled && !isInList(onlys, qFile.getName())) {
+                    continue;
+                } else {
+                    String resultFileName = ACTUAL_RESULT_DIR + File.separator + jobExtToResExt(qFile.getName());
+                    String expectedFileName = EXPECTED_RESULT_DIR + File.separator + jobExtToResExt(qFile.getName());
+                    testSuite.addTest(new RunJobTestCase(HADOOP_CONF_PATH, qFile.getName(), qFile.getAbsolutePath()
+                            .toString(), resultFileName, expectedFileName, dfs));
+                }
+            }
+        }
+        return testSuite;
+    }
+
+    /**
+     * Runs the tests and collects their result in a TestResult.
+     */
+    @Override
+    public void run(TestResult result) {
+        try {
+            int testCount = countTestCases();
+            for (int i = 0; i < testCount; i++) {
+                // cleanupStores();
+                Test each = this.testAt(i);
+                if (result.shouldStop())
+                    break;
+                runTest(each, result);
+            }
+            tearDown();
+        } catch (Exception e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    protected static List<String> getFileList(String ignorePath) throws FileNotFoundException, IOException {
+        BufferedReader reader = new BufferedReader(new FileReader(ignorePath));
+        String s = null;
+        List<String> ignores = new ArrayList<String>();
+        while ((s = reader.readLine()) != null) {
+            ignores.add(s);
+        }
+        reader.close();
+        return ignores;
+    }
+
+    private static String jobExtToResExt(String fname) {
+        int dot = fname.lastIndexOf('.');
+        return fname.substring(0, dot);
+    }
+
+    private static boolean isInList(List<String> onlys, String name) {
+        for (String only : onlys)
+            if (name.indexOf(only) >= 0)
+                return true;
+        return false;
+    }
 
 }
diff --git a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/util/TestUtils.java b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/util/TestUtils.java
index d89ec46..d406125 100644
--- a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/util/TestUtils.java
+++ b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/util/TestUtils.java
@@ -20,6 +20,13 @@
 
 public class TestUtils {
 
+    public static void compareWithResultDir(File expectedFileDir, File actualFileDir) throws Exception {
+        String[] fileNames = expectedFileDir.list();
+        for (String fileName : fileNames) {
+            compareWithResult(new File(expectedFileDir, fileName), new File(actualFileDir, fileName));
+        }
+    }
+
     public static void compareWithResult(File expectedFile, File actualFile) throws Exception {
         BufferedReader readerExpected = new BufferedReader(new FileReader(expectedFile));
         BufferedReader readerActual = new BufferedReader(new FileReader(actualFile));
@@ -28,7 +35,6 @@
         try {
             while ((lineExpected = readerExpected.readLine()) != null) {
                 lineActual = readerActual.readLine();
-                // Assert.assertEquals(lineExpected, lineActual);
                 if (lineActual == null) {
                     throw new Exception("Actual result changed at line " + num + ":\n< " + lineExpected + "\n> ");
                 }
@@ -62,8 +68,10 @@
             if (row1.equals(row2))
                 continue;
 
-            String[] fields1 = row1.split(" ");
-            String[] fields2 = row2.split(" ");
+            boolean spaceOrTab = false;
+            spaceOrTab = row1.contains(" ");
+            String[] fields1 = spaceOrTab ? row1.split(" ") : row1.split("\t");
+            String[] fields2 = spaceOrTab ? row2.split(" ") : row2.split("\t");
 
             for (int j = 0; j < fields1.length; j++) {
                 if (fields1[j].equals(fields2[j])) {
@@ -76,7 +84,7 @@
                     float float1 = (float) double1.doubleValue();
                     float float2 = (float) double2.doubleValue();
 
-                    if (Math.abs(float1 - float2) == 0)
+                    if (Math.abs(float1 - float2) < 1.0e-7)
                         continue;
                     else {
                         return false;
diff --git a/pregelix/pregelix-example/src/test/resources/cluster/stores.properties b/pregelix/pregelix-example/src/test/resources/cluster/stores.properties
index daf881e..04732be 100644
--- a/pregelix/pregelix-example/src/test/resources/cluster/stores.properties
+++ b/pregelix/pregelix-example/src/test/resources/cluster/stores.properties
@@ -1 +1 @@
-store=teststore
\ No newline at end of file
+store=teststore1,teststore2
\ No newline at end of file
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal.result b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal.result
deleted file mode 100644
index 45376e2..0000000
--- a/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal.result
+++ /dev/null
@@ -1,20 +0,0 @@
-0 0
-1 0
-2 0
-3 0
-4 0
-5 0
-6 0
-7 0
-8 0
-9 0
-10 0
-11 0
-12 0
-13 0
-14 0
-15 0
-16 0
-17 0
-18 0
-19 0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal/part-0 b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal/part-0
new file mode 100755
index 0000000..f1f1d9b
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal/part-0
@@ -0,0 +1,5 @@
+0	0
+4	0
+8	0
+12	0
+16	0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal/part-1 b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal/part-1
new file mode 100755
index 0000000..0fa02c1
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal/part-1
@@ -0,0 +1,5 @@
+1	0
+5	0
+9	0
+13	0
+17	0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal/part-2 b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal/part-2
new file mode 100755
index 0000000..542ccae
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal/part-2
@@ -0,0 +1,5 @@
+2	0
+6	0
+10	0
+14	0
+18	0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal/part-3 b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal/part-3
new file mode 100755
index 0000000..1d5d6d9
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsReal/part-3
@@ -0,0 +1,5 @@
+3	0
+7	0
+11	0
+15	0
+19	0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex.result b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex.result
deleted file mode 100644
index dbc30fc..0000000
--- a/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex.result
+++ /dev/null
@@ -1,23 +0,0 @@
-0 0
-1 0
-2 0
-3 0
-4 0
-5 0
-6 0
-7 0
-8 0
-9 0
-10 0
-11 0
-12 0
-13 0
-14 0
-15 0
-16 0
-17 0
-18 0
-19 0
-21 21
-25 25
-27 27
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex/part-0 b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex/part-0
new file mode 100755
index 0000000..f1f1d9b
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex/part-0
@@ -0,0 +1,5 @@
+0	0
+4	0
+8	0
+12	0
+16	0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex/part-1 b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex/part-1
new file mode 100755
index 0000000..4e7d87a
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex/part-1
@@ -0,0 +1,7 @@
+1	0
+5	0
+9	0
+13	0
+17	0
+21	21
+25	25
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex/part-2 b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex/part-2
new file mode 100755
index 0000000..542ccae
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex/part-2
@@ -0,0 +1,5 @@
+2	0
+6	0
+10	0
+14	0
+18	0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex/part-3 b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex/part-3
new file mode 100755
index 0000000..513f3ff
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ConnectedComponentsRealComplex/part-3
@@ -0,0 +1,6 @@
+3	0
+7	0
+11	0
+15	0
+19	0
+27	27
diff --git a/pregelix/pregelix-example/src/test/resources/expected/GraphMutation.result b/pregelix/pregelix-example/src/test/resources/expected/GraphMutation.result
deleted file mode 100644
index a30166c..0000000
--- a/pregelix/pregelix-example/src/test/resources/expected/GraphMutation.result
+++ /dev/null
@@ -1,13 +0,0 @@
-1 0.0
-5 0.0
-7 0.0
-11 0.0
-13 0.0
-17 0.0
-19 0.0
-100 0.0
-500 0.0
-700 0.0
-1100 0.0
-1300 0.0
-1700 0.0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/GraphMutation/part-0 b/pregelix/pregelix-example/src/test/resources/expected/GraphMutation/part-0
new file mode 100755
index 0000000..b5f7ed3
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/GraphMutation/part-0
@@ -0,0 +1,6 @@
+100	0.0
+500	0.0
+700	0.0
+1100	0.0
+1300	0.0
+1700	0.0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/GraphMutation/part-1 b/pregelix/pregelix-example/src/test/resources/expected/GraphMutation/part-1
new file mode 100755
index 0000000..4eca51d
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/GraphMutation/part-1
@@ -0,0 +1,4 @@
+1	0.0
+5	0.0
+13	0.0
+17	0.0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/GraphMutation/part-2 b/pregelix/pregelix-example/src/test/resources/expected/GraphMutation/part-2
new file mode 100755
index 0000000..e69de29
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/GraphMutation/part-2
diff --git a/pregelix/pregelix-example/src/test/resources/expected/GraphMutation/part-3 b/pregelix/pregelix-example/src/test/resources/expected/GraphMutation/part-3
new file mode 100755
index 0000000..9446ff7
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/GraphMutation/part-3
@@ -0,0 +1,3 @@
+7	0.0
+11	0.0
+19	0.0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MaximalClique.result b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique.result
deleted file mode 100644
index d238037..0000000
--- a/pregelix/pregelix-example/src/test/resources/expected/MaximalClique.result
+++ /dev/null
@@ -1,7 +0,0 @@
-1 1,2,3,4;
-2 2,3,4;
-3 
-4 
-5 
-6 
-7 
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MaximalClique/part-0 b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique/part-0
new file mode 100755
index 0000000..902fadf
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique/part-0
@@ -0,0 +1 @@
+4	
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MaximalClique/part-1 b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique/part-1
new file mode 100755
index 0000000..ba34424
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique/part-1
@@ -0,0 +1,2 @@
+1	1,2,3,4;
+5	
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MaximalClique/part-2 b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique/part-2
new file mode 100755
index 0000000..834e389
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique/part-2
@@ -0,0 +1,2 @@
+2	2,3,4;
+6	
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MaximalClique/part-3 b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique/part-3
new file mode 100755
index 0000000..b8e2461
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique/part-3
@@ -0,0 +1,2 @@
+3	3,4;
+7	
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MaximalClique2/part-0 b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique2/part-0
new file mode 100755
index 0000000..902fadf
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique2/part-0
@@ -0,0 +1 @@
+4	
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MaximalClique2/part-1 b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique2/part-1
new file mode 100755
index 0000000..b83e1a3
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique2/part-1
@@ -0,0 +1,2 @@
+1	1,2,3;1,3,4;
+5	
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MaximalClique2/part-2 b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique2/part-2
new file mode 100755
index 0000000..45e2a23
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique2/part-2
@@ -0,0 +1,2 @@
+2	2,3;
+6	
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MaximalClique2/part-3 b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique2/part-3
new file mode 100755
index 0000000..447aa38
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique2/part-3
@@ -0,0 +1 @@
+3	3,4;3,5;
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MaximalClique3/part-0 b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique3/part-0
new file mode 100755
index 0000000..b4dced4
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique3/part-0
@@ -0,0 +1,5 @@
+0	0,19;
+4	4,5,6,7,8,9;
+8	
+12	12,13,14,15,16,17,18,19;
+16	
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MaximalClique3/part-1 b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique3/part-1
new file mode 100755
index 0000000..f554dfe
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique3/part-1
@@ -0,0 +1,5 @@
+1	1,2,3,4,5,6,7,8,9;
+5	
+9	
+13	
+17	
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MaximalClique3/part-2 b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique3/part-2
new file mode 100755
index 0000000..4df9b8c
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique3/part-2
@@ -0,0 +1,5 @@
+2	2,3,4,5,6,7,8,9;
+6	
+10	
+14	
+18	
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MaximalClique3/part-3 b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique3/part-3
new file mode 100755
index 0000000..5131560
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MaximalClique3/part-3
@@ -0,0 +1,5 @@
+3	3,4,5,6,7,8,9;
+7	
+11	11,12,13,14,15,16,17,18,19;
+15	
+19	
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRank.result b/pregelix/pregelix-example/src/test/resources/expected/PageRank.result
deleted file mode 100644
index 9c4d83a..0000000
--- a/pregelix/pregelix-example/src/test/resources/expected/PageRank.result
+++ /dev/null
@@ -1,20 +0,0 @@
-0 0.008290140026154316
-1 0.1535152819247165
-2 0.14646839195826475
-3 0.08125113985998214
-4 0.03976979906329426
-5 0.0225041581462058
-6 0.015736276824953852
-7 0.012542224114863661
-8 0.010628239626209894
-9 0.009294348455354817
-10 0.008290140026154316
-11 0.15351528192471647
-12 0.14646839195826472
-13 0.08125113985998214
-14 0.03976979906329425
-15 0.0225041581462058
-16 0.015736276824953852
-17 0.012542224114863661
-18 0.010628239626209894
-19 0.009294348455354817
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRank/part-0 b/pregelix/pregelix-example/src/test/resources/expected/PageRank/part-0
new file mode 100755
index 0000000..5b07add
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRank/part-0
@@ -0,0 +1,10 @@
+0	0.008290140026154316
+4	0.039769799063294246
+8	0.010628239626209894
+12	0.14646839195826478
+16	0.015736276824953852
+20	0.008290140026154316
+24	0.039769799063294246
+28	0.010628239626209894
+32	0.14646839195826478
+36	0.015736276824953852
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRank/part-1 b/pregelix/pregelix-example/src/test/resources/expected/PageRank/part-1
new file mode 100755
index 0000000..caf8a4c
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRank/part-1
@@ -0,0 +1,10 @@
+1	0.15351528192471647
+5	0.0225041581462058
+9	0.009294348455354817
+13	0.08125113985998214
+17	0.012542224114863661
+21	0.15351528192471647
+25	0.0225041581462058
+29	0.009294348455354817
+33	0.08125113985998214
+37	0.012542224114863661
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRank/part-2 b/pregelix/pregelix-example/src/test/resources/expected/PageRank/part-2
new file mode 100755
index 0000000..29a9d52
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRank/part-2
@@ -0,0 +1,10 @@
+2	0.14646839195826475
+6	0.015736276824953852
+10	0.008290140026154316
+14	0.03976979906329426
+18	0.010628239626209894
+22	0.14646839195826472
+26	0.01573627682495385
+30	0.008290140026154316
+34	0.03976979906329426
+38	0.010628239626209894
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRank/part-3 b/pregelix/pregelix-example/src/test/resources/expected/PageRank/part-3
new file mode 100755
index 0000000..c9bfeb8
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRank/part-3
@@ -0,0 +1,10 @@
+3	0.08125113985998214
+7	0.012542224114863663
+11	0.1535152819247165
+15	0.0225041581462058
+19	0.009294348455354817
+23	0.08125113985998211
+27	0.012542224114863661
+31	0.1535152819247165
+35	0.0225041581462058
+39	0.009294348455354817
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankReal.result b/pregelix/pregelix-example/src/test/resources/expected/PageRankReal.result
deleted file mode 100644
index 6432eda..0000000
--- a/pregelix/pregelix-example/src/test/resources/expected/PageRankReal.result
+++ /dev/null
@@ -1,20 +0,0 @@
-0 0.008290140026154316
-1 0.1535152819247165
-2 0.14646839195826475
-3 0.08125113985998214
-4 0.03976979906329426
-5 0.0225041581462058
-6 0.015736276824953852
-7 0.012542224114863661
-8 0.010628239626209894
-9 0.009294348455354817
-10 0.008290140026154316
-11 0.15351528192471647
-12 0.14646839195826472
-13 0.08125113985998214
-14 0.03976979906329426
-15 0.0225041581462058
-16 0.015736276824953852
-17 0.012542224114863661
-18 0.010628239626209894
-19 0.009294348455354817
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankReal/part-0 b/pregelix/pregelix-example/src/test/resources/expected/PageRankReal/part-0
new file mode 100755
index 0000000..383076e
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankReal/part-0
@@ -0,0 +1,5 @@
+0	0.008290140026154316
+4	0.03976979906329426
+8	0.010628239626209894
+12	0.14646839195826478
+16	0.015736276824953852
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankReal/part-1 b/pregelix/pregelix-example/src/test/resources/expected/PageRankReal/part-1
new file mode 100755
index 0000000..0b1a38c
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankReal/part-1
@@ -0,0 +1,5 @@
+1	0.15351528192471653
+5	0.0225041581462058
+9	0.009294348455354817
+13	0.08125113985998214
+17	0.012542224114863661
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankReal/part-2 b/pregelix/pregelix-example/src/test/resources/expected/PageRankReal/part-2
new file mode 100755
index 0000000..ec995b2
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankReal/part-2
@@ -0,0 +1,5 @@
+2	0.14646839195826478
+6	0.015736276824953852
+10	0.008290140026154316
+14	0.03976979906329426
+18	0.010628239626209894
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankReal/part-3 b/pregelix/pregelix-example/src/test/resources/expected/PageRankReal/part-3
new file mode 100755
index 0000000..edb7484
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankReal/part-3
@@ -0,0 +1,5 @@
+3	0.08125113985998214
+7	0.012542224114863661
+11	0.15351528192471653
+15	0.0225041581462058
+19	0.009294348455354817
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex.result b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex.result
deleted file mode 100644
index 2bd09e1..0000000
--- a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex.result
+++ /dev/null
@@ -1,23 +0,0 @@
-0 0.0072088164890121405
-1 0.12352056961948686
-2 0.12045670441668178
-3 0.06798545786459467
-4 0.03387281259892814
-5 0.01942600635480669
-6 0.013661020012182747
-7 0.0109034351563503
-8 0.009241684574402657
-9 0.008082028259564783
-10 0.007208817414047232
-11 0.07555839219845861
-12 0.07249452699565352
-13 0.05063539695954156
-14 0.029644452692487822
-15 0.018670183493927354
-16 0.013558283213067561
-17 0.010892790899883237
-18 0.009240874593661061
-19 0.008081987856433137
-21 0.006521739130434782
-25 0.006521739130434782
-27 0.006521739130434782
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex/part-0 b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex/part-0
new file mode 100755
index 0000000..1d26aee
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex/part-0
@@ -0,0 +1,5 @@
+0	0.0072088164890121405
+4	0.03387281259892814
+8	0.009241684574402657
+12	0.07249452699565351
+16	0.013558283213067561
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex/part-1 b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex/part-1
new file mode 100755
index 0000000..d013c3e
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex/part-1
@@ -0,0 +1,7 @@
+1	0.12352056961948689
+5	0.01942600635480669
+9	0.008082028259564783
+13	0.050635396959541557
+17	0.010892790899883237
+21	0.006521739130434782
+25	0.006521739130434782
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex/part-2 b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex/part-2
new file mode 100755
index 0000000..e8aa0e1
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex/part-2
@@ -0,0 +1,5 @@
+2	0.12045670441668178
+6	0.013661020012182747
+10	0.007208817414047232
+14	0.029644452692487822
+18	0.009240874593661061
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex/part-3 b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex/part-3
new file mode 100755
index 0000000..e52970d
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealComplex/part-3
@@ -0,0 +1,6 @@
+3	0.06798545786459467
+7	0.0109034351563503
+11	0.0755583921984586
+15	0.018670183493927354
+19	0.008081987856433137
+27	0.006521739130434782
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic.result b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic.result
deleted file mode 100644
index 6432eda..0000000
--- a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic.result
+++ /dev/null
@@ -1,20 +0,0 @@
-0 0.008290140026154316
-1 0.1535152819247165
-2 0.14646839195826475
-3 0.08125113985998214
-4 0.03976979906329426
-5 0.0225041581462058
-6 0.015736276824953852
-7 0.012542224114863661
-8 0.010628239626209894
-9 0.009294348455354817
-10 0.008290140026154316
-11 0.15351528192471647
-12 0.14646839195826472
-13 0.08125113985998214
-14 0.03976979906329426
-15 0.0225041581462058
-16 0.015736276824953852
-17 0.012542224114863661
-18 0.010628239626209894
-19 0.009294348455354817
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic/part-0 b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic/part-0
new file mode 100755
index 0000000..383076e
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic/part-0
@@ -0,0 +1,5 @@
+0	0.008290140026154316
+4	0.03976979906329426
+8	0.010628239626209894
+12	0.14646839195826478
+16	0.015736276824953852
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic/part-1 b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic/part-1
new file mode 100755
index 0000000..0b1a38c
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic/part-1
@@ -0,0 +1,5 @@
+1	0.15351528192471653
+5	0.0225041581462058
+9	0.009294348455354817
+13	0.08125113985998214
+17	0.012542224114863661
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic/part-2 b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic/part-2
new file mode 100755
index 0000000..ec995b2
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic/part-2
@@ -0,0 +1,5 @@
+2	0.14646839195826478
+6	0.015736276824953852
+10	0.008290140026154316
+14	0.03976979906329426
+18	0.010628239626209894
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic/part-3 b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic/part-3
new file mode 100755
index 0000000..5593738
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealDynamic/part-3
@@ -0,0 +1,5 @@
+3	0.08125113985998214
+7	0.012542224114863661
+11	0.15351528192471653
+15	0.022504158146205808
+19	0.009294348455354817
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner.result b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner.result
deleted file mode 100755
index 9a747a6..0000000
--- a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner.result
+++ /dev/null
@@ -1,20 +0,0 @@
-0 0.008290140026154316
-1 0.15351528192471647
-2 0.14646839195826475
-3 0.08125113985998211
-4 0.03976979906329425
-5 0.0225041581462058
-6 0.01573627682495385
-7 0.012542224114863661
-8 0.010628239626209894
-9 0.009294348455354817
-10 0.008290140026154316
-11 0.1535152819247165
-12 0.14646839195826475
-13 0.08125113985998214
-14 0.03976979906329426
-15 0.0225041581462058
-16 0.015736276824953852
-17 0.012542224114863661
-18 0.010628239626209894
-19 0.009294348455354817
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner/part-0 b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner/part-0
new file mode 100755
index 0000000..6fd5f60
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner/part-0
@@ -0,0 +1,5 @@
+0	0.008290140026154316
+4	0.03976979906329425
+8	0.010628239626209894
+12	0.14646839195826475
+16	0.01573627682495385
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner/part-1 b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner/part-1
new file mode 100755
index 0000000..0b1a38c
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner/part-1
@@ -0,0 +1,5 @@
+1	0.15351528192471653
+5	0.0225041581462058
+9	0.009294348455354817
+13	0.08125113985998214
+17	0.012542224114863661
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner/part-2 b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner/part-2
new file mode 100755
index 0000000..69a2803
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner/part-2
@@ -0,0 +1,5 @@
+2	0.14646839195826478
+6	0.015736276824953852
+10	0.008290140026154316
+14	0.03976979906329425
+18	0.010628239626209894
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner/part-3 b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner/part-3
new file mode 100755
index 0000000..7dcb359
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankRealNoCombiner/part-3
@@ -0,0 +1,5 @@
+3	0.08125113985998214
+7	0.012542224114863661
+11	0.1535152819247165
+15	0.0225041581462058
+19	0.009294348455354817
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex.result b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex.result
deleted file mode 100644
index a1dfc0f..0000000
--- a/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex.result
+++ /dev/null
@@ -1,23 +0,0 @@
-0 2
-1 3
-2 1
-3 1
-4 1
-5 1
-6 1
-7 1
-8 1
-9 1
-10 3
-11 2
-12 2
-13 2
-14 2
-15 2
-16 2
-17 2
-18 2
-19 2
-21 0
-25 0
-27 0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex/part-0 b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex/part-0
new file mode 100755
index 0000000..6e3ba89
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex/part-0
@@ -0,0 +1,5 @@
+0	0
+4	1
+8	1
+12	2
+16	2
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex/part-1 b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex/part-1
new file mode 100755
index 0000000..2fcc8eb
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex/part-1
@@ -0,0 +1,7 @@
+1	1
+5	1
+9	1
+13	2
+17	2
+21	0
+25	0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex/part-2 b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex/part-2
new file mode 100755
index 0000000..c93732c
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex/part-2
@@ -0,0 +1,5 @@
+2	1
+6	1
+10	3
+14	2
+18	2
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex/part-3 b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex/part-3
new file mode 100755
index 0000000..c745349
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplex/part-3
@@ -0,0 +1,6 @@
+3	1
+7	1
+11	2
+15	2
+19	2
+27	0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity.result b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity.result
deleted file mode 100644
index 1693fb2..0000000
--- a/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity.result
+++ /dev/null
@@ -1,23 +0,0 @@
-0 1
-1 1
-2 1
-3 1
-4 1
-5 1
-6 1
-7 1
-8 1
-9 1
-10 1
-11 1
-12 1
-13 1
-14 1
-15 1
-16 1
-17 1
-18 1
-19 1
-21 0
-25 2
-27 0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity/part-0 b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity/part-0
new file mode 100755
index 0000000..8e02e13
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity/part-0
@@ -0,0 +1,5 @@
+0	1
+4	1
+8	1
+12	1
+16	1
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity/part-1 b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity/part-1
new file mode 100755
index 0000000..cfbb359
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity/part-1
@@ -0,0 +1,7 @@
+1	1
+5	1
+9	1
+13	1
+17	1
+21	0
+25	2
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity/part-2 b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity/part-2
new file mode 100755
index 0000000..8e3ca7c
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity/part-2
@@ -0,0 +1,5 @@
+2	1
+6	1
+10	1
+14	1
+18	1
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity/part-3 b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity/part-3
new file mode 100755
index 0000000..5f83a3d
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ReachibilityRealComplexNoConnectivity/part-3
@@ -0,0 +1,6 @@
+3	1
+7	1
+11	1
+15	1
+19	1
+27	0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths.result b/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths.result
deleted file mode 100644
index 46d1c73..0000000
--- a/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths.result
+++ /dev/null
@@ -1,20 +0,0 @@
-0 0.0
-1 0.0
-2 100.0
-3 300.0
-4 600.0
-5 1000.0
-6 1500.0
-7 2100.0
-8 2800.0
-9 3600.0
-10 4500.0
-11 5500.0
-12 6600.0
-13 7800.0
-14 9100.0
-15 10500.0
-16 12000.0
-17 13600.0
-18 15300.0
-19 17100.0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths/part-0 b/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths/part-0
new file mode 100755
index 0000000..e8eadcd
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths/part-0
@@ -0,0 +1,10 @@
+0	0.0
+4	600.0
+8	2800.0
+12	6600.0
+16	12000.0
+20	19000.0
+24	27600.0
+28	37800.0
+32	49600.0
+36	63000.0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths/part-1 b/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths/part-1
new file mode 100755
index 0000000..c3d200b
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths/part-1
@@ -0,0 +1,10 @@
+1	0.0
+5	1000.0
+9	3600.0
+13	7800.0
+17	13600.0
+21	21000.0
+25	30000.0
+29	40600.0
+33	52800.0
+37	66600.0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths/part-2 b/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths/part-2
new file mode 100755
index 0000000..779a683
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths/part-2
@@ -0,0 +1,10 @@
+2	100.0
+6	1500.0
+10	4500.0
+14	9100.0
+18	15300.0
+22	23100.0
+26	32500.0
+30	43500.0
+34	56100.0
+38	70300.0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths/part-3 b/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths/part-3
new file mode 100755
index 0000000..57d26c9
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ShortestPaths/part-3
@@ -0,0 +1,10 @@
+3	300.0
+7	2100.0
+11	5500.0
+15	10500.0
+19	17100.0
+23	25300.0
+27	35100.0
+31	46500.0
+35	59500.0
+39	74100.0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal.result b/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal.result
deleted file mode 100644
index b42462f..0000000
--- a/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal.result
+++ /dev/null
@@ -1,20 +0,0 @@
-0 0.0
-1 1.0
-2 2.0
-3 3.0
-4 4.0
-5 5.0
-6 6.0
-7 7.0
-8 8.0
-9 9.0
-10 10.0
-11 11.0
-12 12.0
-13 13.0
-14 14.0
-15 15.0
-16 16.0
-17 17.0
-18 18.0
-19 19.0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal/part-0 b/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal/part-0
new file mode 100755
index 0000000..a1cabe2
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal/part-0
@@ -0,0 +1,5 @@
+0	0.0
+4	4.0
+8	8.0
+12	12.0
+16	16.0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal/part-1 b/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal/part-1
new file mode 100755
index 0000000..303ed2a
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal/part-1
@@ -0,0 +1,5 @@
+1	1.0
+5	5.0
+9	9.0
+13	13.0
+17	17.0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal/part-2 b/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal/part-2
new file mode 100755
index 0000000..0020d25
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal/part-2
@@ -0,0 +1,5 @@
+2	2.0
+6	6.0
+10	10.0
+14	14.0
+18	18.0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal/part-3 b/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal/part-3
new file mode 100755
index 0000000..e2657bd
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/ShortestPathsReal/part-3
@@ -0,0 +1,5 @@
+3	3.0
+7	7.0
+11	11.0
+15	15.0
+19	19.0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting.result b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting.result
deleted file mode 100644
index 4818e13..0000000
--- a/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting.result
+++ /dev/null
@@ -1,7 +0,0 @@
-1 3
-2 2
-3 0
-4 0
-5 1
-6 0
-7 0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/.part-0.crc b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/.part-0.crc
new file mode 100644
index 0000000..61e7df3
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/.part-0.crc
Binary files differ
diff --git a/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/.part-1.crc b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/.part-1.crc
new file mode 100644
index 0000000..9f34827
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/.part-1.crc
Binary files differ
diff --git a/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/.part-2.crc b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/.part-2.crc
new file mode 100644
index 0000000..cfe7fa2
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/.part-2.crc
Binary files differ
diff --git a/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/.part-3.crc b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/.part-3.crc
new file mode 100644
index 0000000..9959654
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/.part-3.crc
Binary files differ
diff --git a/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/part-0 b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/part-0
new file mode 100755
index 0000000..b36d2b5
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/part-0
@@ -0,0 +1 @@
+4	0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/part-1 b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/part-1
new file mode 100755
index 0000000..2812c76
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/part-1
@@ -0,0 +1,2 @@
+1	3
+5	1
diff --git a/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/part-2 b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/part-2
new file mode 100755
index 0000000..25cfb7b
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/part-2
@@ -0,0 +1,2 @@
+2	2
+6	0
diff --git a/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/part-3 b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/part-3
new file mode 100755
index 0000000..2bd8d38
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/TriangleCounting/part-3
@@ -0,0 +1,2 @@
+3	0
+7	0
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique2.xml b/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique2.xml
new file mode 100644
index 0000000..5621259
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique2.xml
@@ -0,0 +1,142 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><configuration>
+<property><name>mapred.tasktracker.dns.nameserver</name><value>default</value></property>
+<property><name>mapred.queue.default.acl-administer-jobs</name><value>*</value></property>
+<property><name>mapred.skip.map.auto.incr.proc.count</name><value>true</value></property>
+<property><name>mapred.jobtracker.instrumentation</name><value>org.apache.hadoop.mapred.JobTrackerMetricsInst</value></property>
+<property><name>mapred.skip.reduce.auto.incr.proc.count</name><value>true</value></property>
+<property><name>fs.hsftp.impl</name><value>org.apache.hadoop.hdfs.HsftpFileSystem</value></property>
+<property><name>mapred.input.dir</name><value>file:/clique2</value></property>
+<property><name>mapred.submit.replication</name><value>10</value></property>
+<property><name>ipc.server.tcpnodelay</name><value>false</value></property>
+<property><name>fs.checkpoint.dir</name><value>${hadoop.tmp.dir}/dfs/namesecondary</value></property>
+<property><name>mapred.output.compression.type</name><value>RECORD</value></property>
+<property><name>mapred.job.shuffle.merge.percent</name><value>0.66</value></property>
+<property><name>mapred.child.java.opts</name><value>-Xmx200m</value></property>
+<property><name>mapred.queue.default.acl-submit-job</name><value>*</value></property>
+<property><name>keep.failed.task.files</name><value>false</value></property>
+<property><name>mapred.jobtracker.job.history.block.size</name><value>3145728</value></property>
+<property><name>io.bytes.per.checksum</name><value>512</value></property>
+<property><name>mapred.task.tracker.report.address</name><value>127.0.0.1:0</value></property>
+<property><name>hadoop.util.hash.type</name><value>murmur</value></property>
+<property><name>fs.hdfs.impl</name><value>org.apache.hadoop.hdfs.DistributedFileSystem</value></property>
+<property><name>fs.ramfs.impl</name><value>org.apache.hadoop.fs.InMemoryFileSystem</value></property>
+<property><name>mapred.jobtracker.restart.recover</name><value>false</value></property>
+<property><name>fs.hftp.impl</name><value>org.apache.hadoop.hdfs.HftpFileSystem</value></property>
+<property><name>fs.checkpoint.period</name><value>3600</value></property>
+<property><name>mapred.child.tmp</name><value>./tmp</value></property>
+<property><name>mapred.local.dir.minspacekill</name><value>0</value></property>
+<property><name>map.sort.class</name><value>org.apache.hadoop.util.QuickSort</value></property>
+<property><name>hadoop.logfile.count</name><value>10</value></property>
+<property><name>ipc.client.connection.maxidletime</name><value>10000</value></property>
+<property><name>mapred.output.dir</name><value>/resultclique</value></property>
+<property><name>io.map.index.skip</name><value>0</value></property>
+<property><name>mapred.tasktracker.expiry.interval</name><value>600000</value></property>
+<property><name>mapred.output.compress</name><value>false</value></property>
+<property><name>io.seqfile.lazydecompress</name><value>true</value></property>
+<property><name>mapred.reduce.parallel.copies</name><value>5</value></property>
+<property><name>fs.checkpoint.size</name><value>67108864</value></property>
+<property><name>mapred.job.reduce.input.buffer.percent</name><value>0.0</value></property>
+<property><name>mapred.job.name</name><value>Maximal Clique 2</value></property>
+<property><name>local.cache.size</name><value>10737418240</value></property>
+<property><name>fs.s3n.impl</name><value>org.apache.hadoop.fs.s3native.NativeS3FileSystem</value></property>
+<property><name>mapred.userlog.limit.kb</name><value>0</value></property>
+<property><name>fs.file.impl</name><value>org.apache.hadoop.fs.LocalFileSystem</value></property>
+<property><name>mapred.task.tracker.http.address</name><value>0.0.0.0:50060</value></property>
+<property><name>mapred.task.timeout</name><value>600000</value></property>
+<property><name>fs.kfs.impl</name><value>org.apache.hadoop.fs.kfs.KosmosFileSystem</value></property>
+<property><name>mapred.max.tracker.blacklists</name><value>4</value></property>
+<property><name>fs.s3.buffer.dir</name><value>${hadoop.tmp.dir}/s3</value></property>
+<property><name>mapred.job.tracker.persist.jobstatus.dir</name><value>/jobtracker/jobsInfo</value></property>
+<property><name>ipc.client.kill.max</name><value>10</value></property>
+<property><name>mapred.tasktracker.instrumentation</name><value>org.apache.hadoop.mapred.TaskTrackerMetricsInst</value></property>
+<property><name>mapred.reduce.tasks.speculative.execution</name><value>true</value></property>
+<property><name>io.sort.record.percent</name><value>0.05</value></property>
+<property><name>hadoop.security.authorization</name><value>false</value></property>
+<property><name>mapred.max.tracker.failures</name><value>4</value></property>
+<property><name>mapred.jobtracker.taskScheduler</name><value>org.apache.hadoop.mapred.JobQueueTaskScheduler</value></property>
+<property><name>mapred.tasktracker.dns.interface</name><value>default</value></property>
+<property><name>mapred.map.tasks</name><value>2</value></property>
+<property><name>mapred.job.tracker.persist.jobstatus.hours</name><value>0</value></property>
+<property><name>fs.s3.sleepTimeSeconds</name><value>10</value></property>
+<property><name>fs.default.name</name><value>file:///</value></property>
+<property><name>tasktracker.http.threads</name><value>40</value></property>
+<property><name>mapred.tasktracker.taskmemorymanager.monitoring-interval</name><value>5000</value></property>
+<property><name>hadoop.rpc.socket.factory.class.default</name><value>org.apache.hadoop.net.StandardSocketFactory</value></property>
+<property><name>mapred.reduce.tasks</name><value>1</value></property>
+<property><name>topology.node.switch.mapping.impl</name><value>org.apache.hadoop.net.ScriptBasedMapping</value></property>
+<property><name>pregelix.vertexClass</name><value>edu.uci.ics.pregelix.example.maximalclique.MaximalCliqueVertex</value></property>
+<property><name>mapred.skip.reduce.max.skip.groups</name><value>0</value></property>
+<property><name>io.file.buffer.size</name><value>4096</value></property>
+<property><name>mapred.jobtracker.maxtasks.per.job</name><value>-1</value></property>
+<property><name>mapred.tasktracker.indexcache.mb</name><value>10</value></property>
+<property><name>mapred.tasktracker.map.tasks.maximum</name><value>2</value></property>
+<property><name>fs.har.impl.disable.cache</name><value>true</value></property>
+<property><name>mapred.task.profile.maps</name><value>0-2</value></property>
+<property><name>hadoop.native.lib</name><value>true</value></property>
+<property><name>fs.s3.block.size</name><value>67108864</value></property>
+<property><name>mapred.job.reuse.jvm.num.tasks</name><value>1</value></property>
+<property><name>mapred.job.tracker.http.address</name><value>0.0.0.0:50030</value></property>
+<property><name>mapred.tasktracker.reduce.tasks.maximum</name><value>2</value></property>
+<property><name>io.compression.codecs</name><value>org.apache.hadoop.io.compress.DefaultCodec,org.apache.hadoop.io.compress.GzipCodec,org.apache.hadoop.io.compress.BZip2Codec</value></property>
+<property><name>mapred.job.shuffle.input.buffer.percent</name><value>0.70</value></property>
+<property><name>io.seqfile.compress.blocksize</name><value>1000000</value></property>
+<property><name>mapred.queue.names</name><value>default</value></property>
+<property><name>fs.har.impl</name><value>org.apache.hadoop.fs.HarFileSystem</value></property>
+<property><name>io.mapfile.bloom.error.rate</name><value>0.005</value></property>
+<property><name>mapred.job.tracker</name><value>local</value></property>
+<property><name>io.skip.checksum.errors</name><value>false</value></property>
+<property><name>mapred.reduce.max.attempts</name><value>4</value></property>
+<property><name>fs.s3.maxRetries</name><value>4</value></property>
+<property><name>ipc.server.listen.queue.size</name><value>128</value></property>
+<property><name>fs.trash.interval</name><value>0</value></property>
+<property><name>mapred.local.dir.minspacestart</name><value>0</value></property>
+<property><name>fs.s3.impl</name><value>org.apache.hadoop.fs.s3.S3FileSystem</value></property>
+<property><name>io.seqfile.sorter.recordlimit</name><value>1000000</value></property>
+<property><name>io.mapfile.bloom.size</name><value>1048576</value></property>
+<property><name>io.sort.mb</name><value>100</value></property>
+<property><name>mapred.local.dir</name><value>${hadoop.tmp.dir}/mapred/local</value></property>
+<property><name>io.sort.factor</name><value>10</value></property>
+<property><name>mapred.task.profile</name><value>false</value></property>
+<property><name>job.end.retry.interval</name><value>30000</value></property>
+<property><name>mapred.tasktracker.procfsbasedprocesstree.sleeptime-before-sigkill</name><value>5000</value></property>
+<property><name>mapred.jobtracker.completeuserjobs.maximum</name><value>100</value></property>
+<property><name>mapred.task.profile.reduces</name><value>0-2</value></property>
+<property><name>webinterface.private.actions</name><value>false</value></property>
+<property><name>hadoop.tmp.dir</name><value>/tmp/hadoop-${user.name}</value></property>
+<property><name>mapred.output.compression.codec</name><value>org.apache.hadoop.io.compress.DefaultCodec</value></property>
+<property><name>mapred.skip.attempts.to.start.skipping</name><value>2</value></property>
+<property><name>mapred.temp.dir</name><value>${hadoop.tmp.dir}/mapred/temp</value></property>
+<property><name>mapred.merge.recordsBeforeProgress</name><value>10000</value></property>
+<property><name>mapred.map.output.compression.codec</name><value>org.apache.hadoop.io.compress.DefaultCodec</value></property>
+<property><name>mapred.compress.map.output</name><value>false</value></property>
+<property><name>io.sort.spill.percent</name><value>0.80</value></property>
+<property><name>fs.checkpoint.edits.dir</name><value>${fs.checkpoint.dir}</value></property>
+<property><name>mapred.userlog.retain.hours</name><value>24</value></property>
+<property><name>mapred.system.dir</name><value>${hadoop.tmp.dir}/mapred/system</value></property>
+<property><name>mapred.line.input.format.linespermap</name><value>1</value></property>
+<property><name>job.end.retry.attempts</name><value>0</value></property>
+<property><name>ipc.client.idlethreshold</name><value>4000</value></property>
+<property><name>pregelix.vertexOutputFormatClass</name><value>edu.uci.ics.pregelix.example.maximalclique.MaximalCliqueVertex$MaximalCliqueVertexOutputFormat</value></property>
+<property><name>mapred.reduce.copy.backoff</name><value>300</value></property>
+<property><name>mapred.map.tasks.speculative.execution</name><value>true</value></property>
+<property><name>mapred.inmem.merge.threshold</name><value>1000</value></property>
+<property><name>hadoop.logfile.size</name><value>10000000</value></property>
+<property><name>pregelix.vertexInputFormatClass</name><value>edu.uci.ics.pregelix.example.maximalclique.TextMaximalCliqueInputFormat</value></property>
+<property><name>pregelix.aggregatorClass</name><value>edu.uci.ics.pregelix.example.maximalclique.MaximalCliqueAggregator</value></property>
+<property><name>mapred.job.queue.name</name><value>default</value></property>
+<property><name>mapred.job.tracker.persist.jobstatus.active</name><value>false</value></property>
+<property><name>pregelix.incStateLength</name><value>true</value></property>
+<property><name>mapred.reduce.slowstart.completed.maps</name><value>0.05</value></property>
+<property><name>topology.script.number.args</name><value>100</value></property>
+<property><name>mapred.skip.map.max.skip.records</name><value>0</value></property>
+<property><name>fs.ftp.impl</name><value>org.apache.hadoop.fs.ftp.FTPFileSystem</value></property>
+<property><name>mapred.task.cache.levels</name><value>2</value></property>
+<property><name>mapred.job.tracker.handler.count</name><value>10</value></property>
+<property><name>io.serializations</name><value>org.apache.hadoop.io.serializer.WritableSerialization</value></property>
+<property><name>ipc.client.connect.max.retries</name><value>10</value></property>
+<property><name>mapred.min.split.size</name><value>0</value></property>
+<property><name>mapred.map.max.attempts</name><value>4</value></property>
+<property><name>jobclient.output.filter</name><value>FAILED</value></property>
+<property><name>ipc.client.tcpnodelay</name><value>false</value></property>
+<property><name>mapred.acls.enabled</name><value>false</value></property>
+</configuration>
\ No newline at end of file
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique3.xml b/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique3.xml
new file mode 100644
index 0000000..d4f81ba
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique3.xml
@@ -0,0 +1,142 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><configuration>
+<property><name>mapred.tasktracker.dns.nameserver</name><value>default</value></property>
+<property><name>mapred.queue.default.acl-administer-jobs</name><value>*</value></property>
+<property><name>mapred.skip.map.auto.incr.proc.count</name><value>true</value></property>
+<property><name>mapred.jobtracker.instrumentation</name><value>org.apache.hadoop.mapred.JobTrackerMetricsInst</value></property>
+<property><name>mapred.skip.reduce.auto.incr.proc.count</name><value>true</value></property>
+<property><name>fs.hsftp.impl</name><value>org.apache.hadoop.hdfs.HsftpFileSystem</value></property>
+<property><name>mapred.input.dir</name><value>file:/clique3</value></property>
+<property><name>mapred.submit.replication</name><value>10</value></property>
+<property><name>ipc.server.tcpnodelay</name><value>false</value></property>
+<property><name>fs.checkpoint.dir</name><value>${hadoop.tmp.dir}/dfs/namesecondary</value></property>
+<property><name>mapred.output.compression.type</name><value>RECORD</value></property>
+<property><name>mapred.job.shuffle.merge.percent</name><value>0.66</value></property>
+<property><name>mapred.child.java.opts</name><value>-Xmx200m</value></property>
+<property><name>mapred.queue.default.acl-submit-job</name><value>*</value></property>
+<property><name>keep.failed.task.files</name><value>false</value></property>
+<property><name>mapred.jobtracker.job.history.block.size</name><value>3145728</value></property>
+<property><name>io.bytes.per.checksum</name><value>512</value></property>
+<property><name>mapred.task.tracker.report.address</name><value>127.0.0.1:0</value></property>
+<property><name>hadoop.util.hash.type</name><value>murmur</value></property>
+<property><name>fs.hdfs.impl</name><value>org.apache.hadoop.hdfs.DistributedFileSystem</value></property>
+<property><name>fs.ramfs.impl</name><value>org.apache.hadoop.fs.InMemoryFileSystem</value></property>
+<property><name>mapred.jobtracker.restart.recover</name><value>false</value></property>
+<property><name>fs.hftp.impl</name><value>org.apache.hadoop.hdfs.HftpFileSystem</value></property>
+<property><name>fs.checkpoint.period</name><value>3600</value></property>
+<property><name>mapred.child.tmp</name><value>./tmp</value></property>
+<property><name>mapred.local.dir.minspacekill</name><value>0</value></property>
+<property><name>map.sort.class</name><value>org.apache.hadoop.util.QuickSort</value></property>
+<property><name>hadoop.logfile.count</name><value>10</value></property>
+<property><name>ipc.client.connection.maxidletime</name><value>10000</value></property>
+<property><name>mapred.output.dir</name><value>/resultclique</value></property>
+<property><name>io.map.index.skip</name><value>0</value></property>
+<property><name>mapred.tasktracker.expiry.interval</name><value>600000</value></property>
+<property><name>mapred.output.compress</name><value>false</value></property>
+<property><name>io.seqfile.lazydecompress</name><value>true</value></property>
+<property><name>mapred.reduce.parallel.copies</name><value>5</value></property>
+<property><name>fs.checkpoint.size</name><value>67108864</value></property>
+<property><name>mapred.job.reduce.input.buffer.percent</name><value>0.0</value></property>
+<property><name>mapred.job.name</name><value>Maximal Clique 3</value></property>
+<property><name>local.cache.size</name><value>10737418240</value></property>
+<property><name>fs.s3n.impl</name><value>org.apache.hadoop.fs.s3native.NativeS3FileSystem</value></property>
+<property><name>mapred.userlog.limit.kb</name><value>0</value></property>
+<property><name>fs.file.impl</name><value>org.apache.hadoop.fs.LocalFileSystem</value></property>
+<property><name>mapred.task.tracker.http.address</name><value>0.0.0.0:50060</value></property>
+<property><name>mapred.task.timeout</name><value>600000</value></property>
+<property><name>fs.kfs.impl</name><value>org.apache.hadoop.fs.kfs.KosmosFileSystem</value></property>
+<property><name>mapred.max.tracker.blacklists</name><value>4</value></property>
+<property><name>fs.s3.buffer.dir</name><value>${hadoop.tmp.dir}/s3</value></property>
+<property><name>mapred.job.tracker.persist.jobstatus.dir</name><value>/jobtracker/jobsInfo</value></property>
+<property><name>ipc.client.kill.max</name><value>10</value></property>
+<property><name>mapred.tasktracker.instrumentation</name><value>org.apache.hadoop.mapred.TaskTrackerMetricsInst</value></property>
+<property><name>mapred.reduce.tasks.speculative.execution</name><value>true</value></property>
+<property><name>io.sort.record.percent</name><value>0.05</value></property>
+<property><name>hadoop.security.authorization</name><value>false</value></property>
+<property><name>mapred.max.tracker.failures</name><value>4</value></property>
+<property><name>mapred.jobtracker.taskScheduler</name><value>org.apache.hadoop.mapred.JobQueueTaskScheduler</value></property>
+<property><name>mapred.tasktracker.dns.interface</name><value>default</value></property>
+<property><name>mapred.map.tasks</name><value>2</value></property>
+<property><name>mapred.job.tracker.persist.jobstatus.hours</name><value>0</value></property>
+<property><name>fs.s3.sleepTimeSeconds</name><value>10</value></property>
+<property><name>fs.default.name</name><value>file:///</value></property>
+<property><name>tasktracker.http.threads</name><value>40</value></property>
+<property><name>mapred.tasktracker.taskmemorymanager.monitoring-interval</name><value>5000</value></property>
+<property><name>hadoop.rpc.socket.factory.class.default</name><value>org.apache.hadoop.net.StandardSocketFactory</value></property>
+<property><name>mapred.reduce.tasks</name><value>1</value></property>
+<property><name>topology.node.switch.mapping.impl</name><value>org.apache.hadoop.net.ScriptBasedMapping</value></property>
+<property><name>pregelix.vertexClass</name><value>edu.uci.ics.pregelix.example.maximalclique.MaximalCliqueVertex</value></property>
+<property><name>mapred.skip.reduce.max.skip.groups</name><value>0</value></property>
+<property><name>io.file.buffer.size</name><value>4096</value></property>
+<property><name>mapred.jobtracker.maxtasks.per.job</name><value>-1</value></property>
+<property><name>mapred.tasktracker.indexcache.mb</name><value>10</value></property>
+<property><name>mapred.tasktracker.map.tasks.maximum</name><value>2</value></property>
+<property><name>fs.har.impl.disable.cache</name><value>true</value></property>
+<property><name>mapred.task.profile.maps</name><value>0-2</value></property>
+<property><name>hadoop.native.lib</name><value>true</value></property>
+<property><name>fs.s3.block.size</name><value>67108864</value></property>
+<property><name>mapred.job.reuse.jvm.num.tasks</name><value>1</value></property>
+<property><name>mapred.job.tracker.http.address</name><value>0.0.0.0:50030</value></property>
+<property><name>mapred.tasktracker.reduce.tasks.maximum</name><value>2</value></property>
+<property><name>io.compression.codecs</name><value>org.apache.hadoop.io.compress.DefaultCodec,org.apache.hadoop.io.compress.GzipCodec,org.apache.hadoop.io.compress.BZip2Codec</value></property>
+<property><name>mapred.job.shuffle.input.buffer.percent</name><value>0.70</value></property>
+<property><name>io.seqfile.compress.blocksize</name><value>1000000</value></property>
+<property><name>mapred.queue.names</name><value>default</value></property>
+<property><name>fs.har.impl</name><value>org.apache.hadoop.fs.HarFileSystem</value></property>
+<property><name>io.mapfile.bloom.error.rate</name><value>0.005</value></property>
+<property><name>mapred.job.tracker</name><value>local</value></property>
+<property><name>io.skip.checksum.errors</name><value>false</value></property>
+<property><name>mapred.reduce.max.attempts</name><value>4</value></property>
+<property><name>fs.s3.maxRetries</name><value>4</value></property>
+<property><name>ipc.server.listen.queue.size</name><value>128</value></property>
+<property><name>fs.trash.interval</name><value>0</value></property>
+<property><name>mapred.local.dir.minspacestart</name><value>0</value></property>
+<property><name>fs.s3.impl</name><value>org.apache.hadoop.fs.s3.S3FileSystem</value></property>
+<property><name>io.seqfile.sorter.recordlimit</name><value>1000000</value></property>
+<property><name>io.mapfile.bloom.size</name><value>1048576</value></property>
+<property><name>io.sort.mb</name><value>100</value></property>
+<property><name>mapred.local.dir</name><value>${hadoop.tmp.dir}/mapred/local</value></property>
+<property><name>io.sort.factor</name><value>10</value></property>
+<property><name>mapred.task.profile</name><value>false</value></property>
+<property><name>job.end.retry.interval</name><value>30000</value></property>
+<property><name>mapred.tasktracker.procfsbasedprocesstree.sleeptime-before-sigkill</name><value>5000</value></property>
+<property><name>mapred.jobtracker.completeuserjobs.maximum</name><value>100</value></property>
+<property><name>mapred.task.profile.reduces</name><value>0-2</value></property>
+<property><name>webinterface.private.actions</name><value>false</value></property>
+<property><name>hadoop.tmp.dir</name><value>/tmp/hadoop-${user.name}</value></property>
+<property><name>mapred.output.compression.codec</name><value>org.apache.hadoop.io.compress.DefaultCodec</value></property>
+<property><name>mapred.skip.attempts.to.start.skipping</name><value>2</value></property>
+<property><name>mapred.temp.dir</name><value>${hadoop.tmp.dir}/mapred/temp</value></property>
+<property><name>mapred.merge.recordsBeforeProgress</name><value>10000</value></property>
+<property><name>mapred.map.output.compression.codec</name><value>org.apache.hadoop.io.compress.DefaultCodec</value></property>
+<property><name>mapred.compress.map.output</name><value>false</value></property>
+<property><name>io.sort.spill.percent</name><value>0.80</value></property>
+<property><name>fs.checkpoint.edits.dir</name><value>${fs.checkpoint.dir}</value></property>
+<property><name>mapred.userlog.retain.hours</name><value>24</value></property>
+<property><name>mapred.system.dir</name><value>${hadoop.tmp.dir}/mapred/system</value></property>
+<property><name>mapred.line.input.format.linespermap</name><value>1</value></property>
+<property><name>job.end.retry.attempts</name><value>0</value></property>
+<property><name>ipc.client.idlethreshold</name><value>4000</value></property>
+<property><name>pregelix.vertexOutputFormatClass</name><value>edu.uci.ics.pregelix.example.maximalclique.MaximalCliqueVertex$MaximalCliqueVertexOutputFormat</value></property>
+<property><name>mapred.reduce.copy.backoff</name><value>300</value></property>
+<property><name>mapred.map.tasks.speculative.execution</name><value>true</value></property>
+<property><name>mapred.inmem.merge.threshold</name><value>1000</value></property>
+<property><name>hadoop.logfile.size</name><value>10000000</value></property>
+<property><name>pregelix.vertexInputFormatClass</name><value>edu.uci.ics.pregelix.example.maximalclique.TextMaximalCliqueInputFormat</value></property>
+<property><name>pregelix.aggregatorClass</name><value>edu.uci.ics.pregelix.example.maximalclique.MaximalCliqueAggregator</value></property>
+<property><name>mapred.job.queue.name</name><value>default</value></property>
+<property><name>mapred.job.tracker.persist.jobstatus.active</name><value>false</value></property>
+<property><name>pregelix.incStateLength</name><value>true</value></property>
+<property><name>mapred.reduce.slowstart.completed.maps</name><value>0.05</value></property>
+<property><name>topology.script.number.args</name><value>100</value></property>
+<property><name>mapred.skip.map.max.skip.records</name><value>0</value></property>
+<property><name>fs.ftp.impl</name><value>org.apache.hadoop.fs.ftp.FTPFileSystem</value></property>
+<property><name>mapred.task.cache.levels</name><value>2</value></property>
+<property><name>mapred.job.tracker.handler.count</name><value>10</value></property>
+<property><name>io.serializations</name><value>org.apache.hadoop.io.serializer.WritableSerialization</value></property>
+<property><name>ipc.client.connect.max.retries</name><value>10</value></property>
+<property><name>mapred.min.split.size</name><value>0</value></property>
+<property><name>mapred.map.max.attempts</name><value>4</value></property>
+<property><name>jobclient.output.filter</name><value>FAILED</value></property>
+<property><name>ipc.client.tcpnodelay</name><value>false</value></property>
+<property><name>mapred.acls.enabled</name><value>false</value></property>
+</configuration>
\ No newline at end of file
diff --git a/pregelix/pregelix-runtime/pom.xml b/pregelix/pregelix-runtime/pom.xml
index bce7b12..2d7b20d 100644
--- a/pregelix/pregelix-runtime/pom.xml
+++ b/pregelix/pregelix-runtime/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
     		<groupId>edu.uci.ics.hyracks</groupId>
     		<artifactId>pregelix</artifactId>
-    		<version>0.2.4-SNAPSHOT</version>
+    		<version>0.2.5-SNAPSHOT</version>
   	</parent>
 
 
@@ -42,8 +42,9 @@
 				</configuration>
 			</plugin>
 			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
+				<version>2.4.1</version>
 				<configuration>
 					<filesets>
 						<fileset>
@@ -73,82 +74,82 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-api</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow-std</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-common</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-btree</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-ipc</artifactId>
-			<version>0.2.4-SNAPSHOT</version>
+			<version>0.2.5-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/IndexLifeCycleManagerProvider.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/IndexLifeCycleManagerProvider.java
new file mode 100644
index 0000000..4fce6b3
--- /dev/null
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/IndexLifeCycleManagerProvider.java
@@ -0,0 +1,22 @@
+package edu.uci.ics.pregelix.runtime.bootstrap;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
+import edu.uci.ics.pregelix.dataflow.context.RuntimeContext;
+
+public class IndexLifeCycleManagerProvider implements IIndexLifecycleManagerProvider {
+
+    private static final long serialVersionUID = 1L;
+
+    public static final IIndexLifecycleManagerProvider INSTANCE = new IndexLifeCycleManagerProvider();
+
+    private IndexLifeCycleManagerProvider() {
+    }
+
+    @Override
+    public IIndexLifecycleManager getLifecycleManager(IHyracksTaskContext ctx) {
+        return RuntimeContext.get(ctx).getIndexLifecycleManager();
+    }
+
+}
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/NCApplicationEntryPoint.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/NCApplicationEntryPoint.java
new file mode 100644
index 0000000..fbebc66
--- /dev/null
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/NCApplicationEntryPoint.java
@@ -0,0 +1,23 @@
+package edu.uci.ics.pregelix.runtime.bootstrap;
+
+import edu.uci.ics.hyracks.api.application.INCApplicationContext;
+import edu.uci.ics.hyracks.api.application.INCApplicationEntryPoint;
+import edu.uci.ics.pregelix.dataflow.context.RuntimeContext;
+
+public class NCApplicationEntryPoint implements INCApplicationEntryPoint {
+    @Override
+    public void start(INCApplicationContext ncAppCtx, String[] args) throws Exception {
+        RuntimeContext rCtx = new RuntimeContext(ncAppCtx);
+        ncAppCtx.setApplicationObject(rCtx);
+    }
+
+    @Override
+    public void notifyStartupComplete() throws Exception {
+
+    }
+
+    @Override
+    public void stop() throws Exception {
+
+    }
+}
\ No newline at end of file
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/NCBootstrapImpl.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/NCBootstrapImpl.java
deleted file mode 100644
index 76c725e..0000000
--- a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/NCBootstrapImpl.java
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.pregelix.runtime.bootstrap;
-
-import java.util.logging.Logger;
-
-import edu.uci.ics.hyracks.api.application.INCApplicationContext;
-import edu.uci.ics.hyracks.api.application.INCBootstrap;
-import edu.uci.ics.pregelix.dataflow.context.RuntimeContext;
-
-public class NCBootstrapImpl implements INCBootstrap {
-    private static final Logger LOGGER = Logger.getLogger(NCBootstrapImpl.class.getName());
-    private INCApplicationContext appCtx;
-
-    @Override
-    public void start() throws Exception {
-        LOGGER.info("Starting NC Bootstrap");
-        RuntimeContext rCtx = new RuntimeContext(appCtx);
-        appCtx.setApplicationObject(rCtx);
-        LOGGER.info("Initialized RuntimeContext: " + rCtx);
-    }
-
-    @Override
-    public void stop() throws Exception {
-        LOGGER.info("Stopping NC Bootstrap");
-        RuntimeContext rCtx = (RuntimeContext) appCtx.getApplicationObject();
-        rCtx.close();
-    }
-
-    @Override
-    public void setApplicationContext(INCApplicationContext appCtx) {
-        this.appCtx = appCtx;
-    }
-}
\ No newline at end of file
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/StorageManagerInterface.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/StorageManagerInterface.java
index 57bbfbe..0cce59d 100644
--- a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/StorageManagerInterface.java
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/StorageManagerInterface.java
@@ -18,6 +18,8 @@
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceRepository;
+import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactory;
 import edu.uci.ics.pregelix.dataflow.context.RuntimeContext;
 
 public class StorageManagerInterface implements IStorageManagerInterface {
@@ -37,4 +39,14 @@
     public IFileMapProvider getFileMapProvider(IHyracksTaskContext ctx) {
         return RuntimeContext.get(ctx).getFileMapManager();
     }
+
+    @Override
+    public ILocalResourceRepository getLocalResourceRepository(IHyracksTaskContext ctx) {
+        return RuntimeContext.get(ctx).getLocalResourceRepository();
+    }
+
+    @Override
+    public ResourceIdFactory getResourceIdFactory(IHyracksTaskContext ctx) {
+        return RuntimeContext.get(ctx).getResourceIdFactory();
+    }
 }
\ No newline at end of file
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/TreeIndexRegistryProvider.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/TreeIndexRegistryProvider.java
deleted file mode 100644
index 7d66422..0000000
--- a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/TreeIndexRegistryProvider.java
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.pregelix.runtime.bootstrap;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexRegistry;
-import edu.uci.ics.pregelix.dataflow.context.RuntimeContext;
-
-public class TreeIndexRegistryProvider implements IIndexRegistryProvider<IIndex> {
-    private static final long serialVersionUID = 1L;
-
-    public static final TreeIndexRegistryProvider INSTANCE = new TreeIndexRegistryProvider();
-
-    private TreeIndexRegistryProvider() {
-    }
-
-    @Override
-    public IndexRegistry<IIndex> getRegistry(IHyracksTaskContext ctx) {
-        return RuntimeContext.get(ctx).getTreeIndexRegistry();
-    }
-}
\ No newline at end of file
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/function/ComputeUpdateFunctionFactory.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/function/ComputeUpdateFunctionFactory.java
index e3c5a48..b6df213 100644
--- a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/function/ComputeUpdateFunctionFactory.java
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/function/ComputeUpdateFunctionFactory.java
@@ -109,7 +109,7 @@
             @Override
             public void open(IHyracksTaskContext ctx, RecordDescriptor rd, IFrameWriter... writers)
                     throws HyracksDataException {
-                this.conf = confFactory.createConfiguration();
+                this.conf = confFactory.createConfiguration(ctx);
                 this.dynamicStateLength = BspUtils.getDynamicVertexValueSize(conf);
                 this.aggregator = BspUtils.createGlobalAggregator(conf);
                 this.aggregator.init();
@@ -175,8 +175,12 @@
                 ArrayListWritable msgContentList = (ArrayListWritable) tuple[1];
                 msgContentList.reset(msgIterator);
 
-                if (!msgIterator.hasNext() && vertex.isHalted())
+                if (!msgIterator.hasNext() && vertex.isHalted()) {
                     return;
+                }
+                if (vertex.isHalted()) {
+                    vertex.activate();
+                }
 
                 try {
                 	vertex.activate();
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/function/StartComputeUpdateFunctionFactory.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/function/StartComputeUpdateFunctionFactory.java
index 0cf64a0..9998205 100644
--- a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/function/StartComputeUpdateFunctionFactory.java
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/function/StartComputeUpdateFunctionFactory.java
@@ -112,7 +112,7 @@
             @Override
             public void open(IHyracksTaskContext ctx, RecordDescriptor rd, IFrameWriter... writers)
                     throws HyracksDataException {
-                this.conf = confFactory.createConfiguration();
+                this.conf = confFactory.createConfiguration(ctx);
                 this.dynamicStateLength = BspUtils.getDynamicVertexValueSize(conf);
                 this.aggregator = BspUtils.createGlobalAggregator(conf);
                 this.aggregator.init();
@@ -176,8 +176,12 @@
                 vertex.setOutputAppenders(appenders);
                 vertex.setOutputTupleBuilders(tbs);
 
-                if (!msgIterator.hasNext() && vertex.isHalted())
+                if (!msgIterator.hasNext() && vertex.isHalted()) {
                     return;
+                }
+                if (vertex.isHalted()) {
+                    vertex.activate();
+                }
 
                 try {
                     vertex.compute(msgIterator);
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/simpleagg/AccumulatingAggregatorFactory.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/simpleagg/AccumulatingAggregatorFactory.java
index 8f63b6e..851a83a 100644
--- a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/simpleagg/AccumulatingAggregatorFactory.java
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/simpleagg/AccumulatingAggregatorFactory.java
@@ -40,7 +40,7 @@
 
     @SuppressWarnings("unchecked")
     @Override
-    public IAggregatorDescriptor createAggregator(IHyracksTaskContext ctx, RecordDescriptor inRecordDesc,
+    public IAggregatorDescriptor createAggregator(final IHyracksTaskContext ctx, RecordDescriptor inRecordDesc,
             RecordDescriptor outRecordDescriptor, int[] aggKeys, int[] partialKeys) throws HyracksDataException {
 
         return new IAggregatorDescriptor() {
@@ -113,7 +113,7 @@
                 for (int i = 0; i < agg.length; i++) {
                     aggOutput[i] = new ArrayBackedValueStorage();
                     try {
-                        agg[i] = aggFactories[i].createAggregateFunction(aggOutput[i]);
+                        agg[i] = aggFactories[i].createAggregateFunction(ctx, aggOutput[i]);
                     } catch (Exception e) {
                         throw new IllegalStateException(e);
                     }
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/simpleagg/AggregationFunction.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/simpleagg/AggregationFunction.java
index 1813dcc..3cf46a2 100644
--- a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/simpleagg/AggregationFunction.java
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/simpleagg/AggregationFunction.java
@@ -26,6 +26,7 @@
 import org.apache.hadoop.io.WritableComparable;
 
 import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.comm.util.ByteBufferInputStream;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference;
@@ -53,9 +54,9 @@
     private MsgList msgList = new MsgList();
     private boolean keyRead = false;
 
-    public AggregationFunction(IConfigurationFactory confFactory, DataOutput output, boolean isFinalStage,
-            boolean partialAggAsInput) throws HyracksDataException {
-        this.conf = confFactory.createConfiguration();
+    public AggregationFunction(IHyracksTaskContext ctx, IConfigurationFactory confFactory, DataOutput output,
+            boolean isFinalStage, boolean partialAggAsInput) throws HyracksDataException {
+        this.conf = confFactory.createConfiguration(ctx);
         this.output = output;
         this.isFinalStage = isFinalStage;
         this.partialAggAsInput = partialAggAsInput;
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/simpleagg/AggregationFunctionFactory.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/simpleagg/AggregationFunctionFactory.java
index a09f688..7ce9e1d 100644
--- a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/simpleagg/AggregationFunctionFactory.java
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/simpleagg/AggregationFunctionFactory.java
@@ -17,6 +17,7 @@
 
 import java.io.DataOutput;
 
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
 import edu.uci.ics.pregelix.dataflow.base.IConfigurationFactory;
@@ -36,8 +37,9 @@
     }
 
     @Override
-    public IAggregateFunction createAggregateFunction(IDataOutputProvider provider) throws HyracksException {
+    public IAggregateFunction createAggregateFunction(IHyracksTaskContext ctx, IDataOutputProvider provider)
+            throws HyracksException {
         DataOutput output = provider.getDataOutput();
-        return new AggregationFunction(confFactory, output, isFinalStage, partialAggAsInput);
+        return new AggregationFunction(ctx, confFactory, output, isFinalStage, partialAggAsInput);
     }
 }
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/DatatypeHelper.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/DatatypeHelper.java
new file mode 100644
index 0000000..f9085c4
--- /dev/null
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/DatatypeHelper.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.pregelix.runtime.touchpoint;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.io.NullWritable;
+import org.apache.hadoop.io.Writable;
+import org.apache.hadoop.mapred.JobConf;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+@SuppressWarnings("deprecation")
+public class DatatypeHelper {
+    private static final class WritableSerializerDeserializer<T extends Writable> implements ISerializerDeserializer<T> {
+        private static final long serialVersionUID = 1L;
+
+        private Class<T> clazz;
+        private T object;
+
+        private WritableSerializerDeserializer(Class<T> clazz) {
+            this.clazz = clazz;
+        }
+
+        @SuppressWarnings("unchecked")
+        private T createInstance() throws HyracksDataException {
+            // TODO remove "if", create a new WritableInstanceOperations class
+            // that deals with Writables that don't have public constructors
+            if (NullWritable.class.equals(clazz)) {
+                return (T) NullWritable.get();
+            }
+            try {
+                return clazz.newInstance();
+            } catch (InstantiationException e) {
+                throw new HyracksDataException(e);
+            } catch (IllegalAccessException e) {
+                throw new HyracksDataException(e);
+            }
+        }
+
+        @Override
+        public T deserialize(DataInput in) throws HyracksDataException {
+            if (object == null) {
+                object = createInstance();
+            }
+            try {
+                object.readFields(in);
+            } catch (IOException e) {
+                e.printStackTrace();
+                throw new HyracksDataException(e);
+            }
+            return object;
+        }
+
+        @Override
+        public void serialize(T instance, DataOutput out) throws HyracksDataException {
+            try {
+                instance.write(out);
+            } catch (IOException e) {
+                throw new HyracksDataException(e);
+            }
+        }
+
+    }
+
+    @SuppressWarnings({ "rawtypes", "unchecked" })
+    public static ISerializerDeserializer<? extends Writable> createSerializerDeserializer(
+            Class<? extends Writable> fClass) {
+        return new WritableSerializerDeserializer(fClass);
+    }
+
+    public static RecordDescriptor createKeyValueRecordDescriptor(Class<? extends Writable> keyClass,
+            Class<? extends Writable> valueClass) {
+        @SuppressWarnings("rawtypes")
+        ISerializerDeserializer[] fields = new ISerializerDeserializer[2];
+        fields[0] = createSerializerDeserializer(keyClass);
+        fields[1] = createSerializerDeserializer(valueClass);
+        return new RecordDescriptor(fields);
+    }
+
+    public static RecordDescriptor createOneFieldRecordDescriptor(Class<? extends Writable> fieldClass) {
+        @SuppressWarnings("rawtypes")
+        ISerializerDeserializer[] fields = new ISerializerDeserializer[1];
+        fields[0] = createSerializerDeserializer(fieldClass);
+        return new RecordDescriptor(fields);
+    }
+
+    public static JobConf map2JobConf(Map<String, String> jobConfMap) {
+        JobConf jobConf;
+        synchronized (Configuration.class) {
+            jobConf = new JobConf();
+            for (Entry<String, String> entry : jobConfMap.entrySet()) {
+                jobConf.set(entry.getKey(), entry.getValue());
+            }
+        }
+        return jobConf;
+    }
+
+    public static Map<String, String> jobConf2Map(JobConf jobConf) {
+        Map<String, String> jobConfMap = new HashMap<String, String>();
+        for (Entry<String, String> entry : jobConf) {
+            jobConfMap.put(entry.getKey(), entry.getValue());
+        }
+        return jobConfMap;
+    }
+}
\ No newline at end of file
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/PreSuperStepRuntimeHookFactory.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/PreSuperStepRuntimeHookFactory.java
index 5f0ed9e..850ae1e 100644
--- a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/PreSuperStepRuntimeHookFactory.java
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/PreSuperStepRuntimeHookFactory.java
@@ -39,7 +39,7 @@
 
             @Override
             public void configure(IHyracksTaskContext ctx) throws HyracksDataException {
-                Configuration conf = confFactory.createConfiguration();
+                Configuration conf = confFactory.createConfiguration(ctx);
                 IterationUtils.setProperties(giraphJobId, ctx, conf);
             }
 
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/RuntimeHookFactory.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/RuntimeHookFactory.java
index c025f85..05b1542 100644
--- a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/RuntimeHookFactory.java
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/RuntimeHookFactory.java
@@ -44,9 +44,10 @@
 
             @Override
             public void configure(IHyracksTaskContext ctx) throws HyracksDataException {
-                Configuration conf = confFactory.createConfiguration();
+                Configuration conf = confFactory.createConfiguration(ctx);
                 try {
                     TaskAttemptContext mapperContext = ctxFactory.createContext(conf, new TaskAttemptID());
+                    mapperContext.getConfiguration().setClassLoader(ctx.getJobletContext().getClassLoader());
                     Vertex.setContext(mapperContext);
                     BspUtils.setDefaultConfiguration(conf);
                 } catch (Exception e) {
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/VertexIdPartitionComputerFactory.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/VertexIdPartitionComputerFactory.java
index 5eff497..5b4b1f0 100644
--- a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/VertexIdPartitionComputerFactory.java
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/VertexIdPartitionComputerFactory.java
@@ -24,20 +24,22 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ITuplePartitionComputerFactory;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.comm.util.ByteBufferInputStream;
+import edu.uci.ics.pregelix.dataflow.std.base.ISerializerDeserializerFactory;
 
 public class VertexIdPartitionComputerFactory<K extends Writable, V extends Writable> implements
         ITuplePartitionComputerFactory {
     private static final long serialVersionUID = 1L;
-    private final ISerializerDeserializer<K> keyIO;
+    private final ISerializerDeserializerFactory<K> keyIOFactory;
 
-    public VertexIdPartitionComputerFactory(ISerializerDeserializer<K> keyIO) {
-        this.keyIO = keyIO;
+    public VertexIdPartitionComputerFactory(ISerializerDeserializerFactory<K> keyIOFactory) {
+        this.keyIOFactory = keyIOFactory;
     }
 
     public ITuplePartitionComputer createPartitioner() {
         return new ITuplePartitionComputer() {
             private final ByteBufferInputStream bbis = new ByteBufferInputStream();
             private final DataInputStream dis = new DataInputStream(bbis);
+            private final ISerializerDeserializer<K> keyIO = keyIOFactory.getSerializerDeserializer();
 
             public int partition(IFrameTupleAccessor accessor, int tIndex, int nParts) throws HyracksDataException {
                 int keyStart = accessor.getTupleStartOffset(tIndex) + accessor.getFieldSlotsLength()
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/WritableSerializerDeserializerFactory.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/WritableSerializerDeserializerFactory.java
new file mode 100644
index 0000000..96f781c
--- /dev/null
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/WritableSerializerDeserializerFactory.java
@@ -0,0 +1,21 @@
+package edu.uci.ics.pregelix.runtime.touchpoint;
+
+import org.apache.hadoop.io.Writable;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.pregelix.dataflow.std.base.ISerializerDeserializerFactory;
+
+public class WritableSerializerDeserializerFactory<T extends Writable> implements ISerializerDeserializerFactory<T> {
+    private static final long serialVersionUID = 1L;
+    private final Class<T> clazz;
+
+    public WritableSerializerDeserializerFactory(Class<T> clazz) {
+        this.clazz = clazz;
+    }
+
+    @SuppressWarnings({ "rawtypes", "unchecked" })
+    @Override
+    public ISerializerDeserializer getSerializerDeserializer() {
+        return DatatypeHelper.createSerializerDeserializer(clazz);
+    }
+}