diff --git a/.gitignore b/.gitignore
index babae45..0517ac2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,8 +10,14 @@
 expected
 teststore1
 teststore2
+dev1
+dev2
+dev3
+dev4
 derby.log
 hadoop-conf-tmp
 metastore_db
 teststore
 output
+tmp
+dist
diff --git a/algebricks/algebricks-common/pom.xml b/algebricks/algebricks-common/pom.xml
index 87f7004..a6279b9 100644
--- a/algebricks/algebricks-common/pom.xml
+++ b/algebricks/algebricks-common/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -41,7 +41,7 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-api</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-compiler/pom.xml b/algebricks/algebricks-compiler/pom.xml
index dbacd2f..f276439 100644
--- a/algebricks/algebricks-compiler/pom.xml
+++ b/algebricks/algebricks-compiler/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -41,12 +41,12 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-rewriter</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-core</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-core/pom.xml b/algebricks/algebricks-core/pom.xml
index 0fd538e..ac8cd89 100644
--- a/algebricks/algebricks-core/pom.xml
+++ b/algebricks/algebricks-core/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -41,27 +41,27 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-storage-am-btree</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-storage-am-rtree</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-dataflow-std</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-runtime</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-common</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-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 af65ebd..c9ef2f3 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
@@ -57,8 +57,8 @@
     INSERT_DELETE,
     INDEX_INSERT_DELETE,
     UPDATE,
-    INVERTED_INDEX_SEARCH,
-    FUZZY_INVERTED_INDEX_SEARCH,
+    SINGLE_PARTITION_INVERTED_INDEX_SEARCH,
+    LENGTH_PARTITIONED_INVERTED_INDEX_SEARCH,
     PARTITIONINGSPLIT,
     EXTENSION_OPERATOR
 }
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/IndexInsertDeletePOperator.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/IndexInsertDeletePOperator.java
index 2f9417b..879f2a9 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/IndexInsertDeletePOperator.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/IndexInsertDeletePOperator.java
@@ -83,6 +83,7 @@
         scanVariables.add(new LogicalVariable(-1));
         IPhysicalPropertiesVector r = dataSourceIndex.getDataSource().getPropertiesProvider()
                 .computePropertiesVector(scanVariables);
+        r.getLocalProperties().clear();
         IPhysicalPropertiesVector[] requirements = new IPhysicalPropertiesVector[1];
         requirements[0] = r;
         return new PhysicalRequirements(requirements, IPartitioningRequirementsCoordinator.NO_COORDINATION);
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 d8b7c33..c85bfb9 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
@@ -73,6 +73,7 @@
         scanVariables.addAll(keys);
         scanVariables.add(new LogicalVariable(-1));
         IPhysicalPropertiesVector r = dataSource.getPropertiesProvider().computePropertiesVector(scanVariables);
+        r.getLocalProperties().clear();
         IPhysicalPropertiesVector[] requirements = new IPhysicalPropertiesVector[1];
         requirements[0] = r;
         return new PhysicalRequirements(requirements, IPartitioningRequirementsCoordinator.NO_COORDINATION);
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/prettyprint/LogicalOperatorPrettyPrintVisitor.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/prettyprint/LogicalOperatorPrettyPrintVisitor.java
index 9c5de9c..49ec269 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/prettyprint/LogicalOperatorPrettyPrintVisitor.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/prettyprint/LogicalOperatorPrettyPrintVisitor.java
@@ -349,7 +349,7 @@
     @Override
     public String visitExtensionOperator(ExtensionOperator op, Integer indent) throws AlgebricksException {
         StringBuilder buffer = new StringBuilder();
-        addIndent(buffer, indent).append("statistics collection");
+        addIndent(buffer, indent).append(op.toString());
         return buffer.toString();
     }
 
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/properties/AsterixNodeGroupDomain.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/properties/DefaultNodeGroupDomain.java
similarity index 75%
rename from algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/properties/AsterixNodeGroupDomain.java
rename to algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/properties/DefaultNodeGroupDomain.java
index ab2cde2..226f02c 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/properties/AsterixNodeGroupDomain.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/properties/DefaultNodeGroupDomain.java
@@ -14,21 +14,17 @@
  */
 package edu.uci.ics.hyracks.algebricks.core.algebra.properties;
 
-public class AsterixNodeGroupDomain implements INodeDomain {
+public class DefaultNodeGroupDomain implements INodeDomain {
 
     private String groupName;
 
-    public AsterixNodeGroupDomain(String groupName) {
+    public DefaultNodeGroupDomain(String groupName) {
         this.groupName = groupName;
     }
 
     @Override
     public boolean sameAs(INodeDomain domain) {
-        if (!(domain instanceof AsterixNodeGroupDomain)) {
-            return false;
-        }
-        AsterixNodeGroupDomain dom2 = (AsterixNodeGroupDomain) domain;
-        return groupName.equals(dom2.groupName);
+        return true;
     }
 
     @Override
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/jobgen/impl/JobBuilder.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/jobgen/impl/JobBuilder.java
index eb1e99c..1fe6b15 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/jobgen/impl/JobBuilder.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/jobgen/impl/JobBuilder.java
@@ -26,6 +26,8 @@
 import edu.uci.ics.hyracks.algebricks.common.utils.Pair;
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.IHyracksJobBuilder;
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator.ExecutionMode;
 import edu.uci.ics.hyracks.algebricks.runtime.base.IPushRuntimeFactory;
 import edu.uci.ics.hyracks.algebricks.runtime.operators.meta.AlgebricksMetaOperatorDescriptor;
 import edu.uci.ics.hyracks.api.dataflow.ConnectorDescriptorId;
@@ -73,6 +75,11 @@
         if (pc != null) {
             pcForMicroOps.put(op, pc);
         }
+        AbstractLogicalOperator logicalOp = (AbstractLogicalOperator) op;
+        if (logicalOp.getExecutionMode() == ExecutionMode.UNPARTITIONED && pc == null) {
+            AlgebricksPartitionConstraint apc = new AlgebricksCountPartitionConstraint(1);
+            pcForMicroOps.put(logicalOp, apc);
+        }
     }
 
     @Override
diff --git a/algebricks/algebricks-data/pom.xml b/algebricks/algebricks-data/pom.xml
index 613d692..b61a701 100644
--- a/algebricks/algebricks-data/pom.xml
+++ b/algebricks/algebricks-data/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -41,12 +41,12 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-common</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-data-std</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-examples/piglet-example/pom.xml b/algebricks/algebricks-examples/piglet-example/pom.xml
index 3c1588d..8297f4d 100644
--- a/algebricks/algebricks-examples/piglet-example/pom.xml
+++ b/algebricks/algebricks-examples/piglet-example/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>algebricks-examples</artifactId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -121,7 +121,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>junit</groupId>
diff --git a/algebricks/algebricks-examples/pom.xml b/algebricks/algebricks-examples/pom.xml
index 0376c13..31b7f2c 100644
--- a/algebricks/algebricks-examples/pom.xml
+++ b/algebricks/algebricks-examples/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/algebricks/algebricks-rewriter/pom.xml b/algebricks/algebricks-rewriter/pom.xml
index d81a479..e66486f 100644
--- a/algebricks/algebricks-rewriter/pom.xml
+++ b/algebricks/algebricks-rewriter/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -41,7 +41,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>algebricks-core</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   	</dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/EnforceStructuralPropertiesRule.java b/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/EnforceStructuralPropertiesRule.java
index 9292e07..98606f1 100644
--- a/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/EnforceStructuralPropertiesRule.java
+++ b/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/EnforceStructuralPropertiesRule.java
@@ -59,7 +59,7 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.physical.StableSortPOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.prettyprint.LogicalOperatorPrettyPrintVisitor;
 import edu.uci.ics.hyracks.algebricks.core.algebra.prettyprint.PlanPrettyPrinter;
-import edu.uci.ics.hyracks.algebricks.core.algebra.properties.AsterixNodeGroupDomain;
+import edu.uci.ics.hyracks.algebricks.core.algebra.properties.DefaultNodeGroupDomain;
 import edu.uci.ics.hyracks.algebricks.core.algebra.properties.FunctionalDependency;
 import edu.uci.ics.hyracks.algebricks.core.algebra.properties.ILocalStructuralProperty;
 import edu.uci.ics.hyracks.algebricks.core.algebra.properties.ILocalStructuralProperty.PropertyType;
@@ -85,7 +85,7 @@
 
 public class EnforceStructuralPropertiesRule implements IAlgebraicRewriteRule {
 
-    private static final INodeDomain DEFAULT_DOMAIN = new AsterixNodeGroupDomain("__DEFAULT");
+    private static final INodeDomain DEFAULT_DOMAIN = new DefaultNodeGroupDomain("__DEFAULT");
 
     private PhysicalOptimizationConfig physicalOptimizationConfig;
 
diff --git a/algebricks/algebricks-runtime/pom.xml b/algebricks/algebricks-runtime/pom.xml
index 31b25be..570afb4 100644
--- a/algebricks/algebricks-runtime/pom.xml
+++ b/algebricks/algebricks-runtime/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -41,27 +41,27 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-storage-am-btree</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-storage-am-rtree</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-dataflow-std</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-common</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-data</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/base/IPushRuntimeFactory.java b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/base/IPushRuntimeFactory.java
index 12a5282..703bc1f 100644
--- a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/base/IPushRuntimeFactory.java
+++ b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/base/IPushRuntimeFactory.java
@@ -18,7 +18,8 @@
 
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 
 public interface IPushRuntimeFactory extends Serializable {
-    public IPushRuntime createPushRuntime(IHyracksTaskContext ctx) throws AlgebricksException;
+    public IPushRuntime createPushRuntime(IHyracksTaskContext ctx) throws AlgebricksException, HyracksDataException;
 }
diff --git a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/aggreg/NestedPlansAccumulatingAggregatorFactory.java b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/aggreg/NestedPlansAccumulatingAggregatorFactory.java
index c17b06f..8f2eaac 100644
--- a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/aggreg/NestedPlansAccumulatingAggregatorFactory.java
+++ b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/aggreg/NestedPlansAccumulatingAggregatorFactory.java
@@ -141,7 +141,7 @@
     }
 
     private IFrameWriter assemblePipeline(AlgebricksPipeline subplan, IFrameWriter writer, IHyracksTaskContext ctx)
-            throws AlgebricksException {
+            throws AlgebricksException, HyracksDataException {
         // plug the operators
         IFrameWriter start = writer;
         IPushRuntimeFactory[] runtimeFactories = subplan.getRuntimeFactories();
diff --git a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/base/AbstractOneInputOneOutputOneFramePushRuntime.java b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/base/AbstractOneInputOneOutputOneFramePushRuntime.java
index 7f5fead..082e98a 100644
--- a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/base/AbstractOneInputOneOutputOneFramePushRuntime.java
+++ b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/base/AbstractOneInputOneOutputOneFramePushRuntime.java
@@ -85,7 +85,7 @@
         }
     }
 
-    protected final void initAccessAppend(IHyracksTaskContext ctx) {
+    protected final void initAccessAppend(IHyracksTaskContext ctx) throws HyracksDataException {
         // if (allocFrame) {
         frame = ctx.allocateFrame();
         appender = new FrameTupleAppender(ctx.getFrameSize());
@@ -94,7 +94,7 @@
         tAccess = new FrameTupleAccessor(ctx.getFrameSize(), inputRecordDesc);
     }
 
-    protected final void initAccessAppendRef(IHyracksTaskContext ctx) {
+    protected final void initAccessAppendRef(IHyracksTaskContext ctx) throws HyracksDataException {
         initAccessAppend(ctx);
         tRef = new FrameTupleReference();
     }
diff --git a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/base/AbstractOneInputOneOutputRuntimeFactory.java b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/base/AbstractOneInputOneOutputRuntimeFactory.java
index 084b085..43270b6 100644
--- a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/base/AbstractOneInputOneOutputRuntimeFactory.java
+++ b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/base/AbstractOneInputOneOutputRuntimeFactory.java
@@ -18,6 +18,7 @@
 import edu.uci.ics.hyracks.algebricks.runtime.base.IPushRuntime;
 import edu.uci.ics.hyracks.algebricks.runtime.base.IPushRuntimeFactory;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 
 public abstract class AbstractOneInputOneOutputRuntimeFactory implements IPushRuntimeFactory {
 
@@ -30,11 +31,11 @@
     }
 
     @Override
-    public IPushRuntime createPushRuntime(IHyracksTaskContext ctx) throws AlgebricksException {
+    public IPushRuntime createPushRuntime(IHyracksTaskContext ctx) throws AlgebricksException, HyracksDataException {
         return createOneOutputPushRuntime(ctx);
     }
 
     public abstract AbstractOneInputOneOutputPushRuntime createOneOutputPushRuntime(IHyracksTaskContext ctx)
-            throws AlgebricksException;
+            throws AlgebricksException, HyracksDataException;
 
 }
diff --git a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/meta/PipelineAssembler.java b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/meta/PipelineAssembler.java
index cef05d8..5bcf933 100644
--- a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/meta/PipelineAssembler.java
+++ b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/meta/PipelineAssembler.java
@@ -20,6 +20,7 @@
 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;
 
 public class PipelineAssembler {
 
@@ -40,7 +41,8 @@
         this.outputArity = outputArity;
     }
 
-    public IFrameWriter assemblePipeline(IFrameWriter writer, IHyracksTaskContext ctx) throws AlgebricksException {
+    public IFrameWriter assemblePipeline(IFrameWriter writer, IHyracksTaskContext ctx) throws AlgebricksException,
+            HyracksDataException {
         // plug the operators
         IFrameWriter start = writer;// this.writer;
         for (int i = pipeline.getRuntimeFactories().length - 1; i >= 0; i--) {
diff --git a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/meta/SubplanRuntimeFactory.java b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/meta/SubplanRuntimeFactory.java
index 6e43bd1..0499684 100644
--- a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/meta/SubplanRuntimeFactory.java
+++ b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/meta/SubplanRuntimeFactory.java
@@ -67,7 +67,7 @@
 
     @Override
     public AbstractOneInputOneOutputPushRuntime createOneOutputPushRuntime(final IHyracksTaskContext ctx)
-            throws AlgebricksException {
+            throws AlgebricksException, HyracksDataException {
 
         RecordDescriptor pipelineOutputRecordDescriptor = null;
 
diff --git a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/std/EmptyTupleSourceRuntimeFactory.java b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/std/EmptyTupleSourceRuntimeFactory.java
index 38eddd1..745fdf6 100644
--- a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/std/EmptyTupleSourceRuntimeFactory.java
+++ b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/std/EmptyTupleSourceRuntimeFactory.java
@@ -38,7 +38,7 @@
     }
 
     @Override
-    public IPushRuntime createPushRuntime(final IHyracksTaskContext ctx) {
+    public IPushRuntime createPushRuntime(final IHyracksTaskContext ctx) throws HyracksDataException {
         return new AbstractOneInputSourcePushRuntime() {
 
             private ByteBuffer frame = ctx.allocateFrame();
diff --git a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/std/NestedTupleSourceRuntimeFactory.java b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/std/NestedTupleSourceRuntimeFactory.java
index dc155a2..5486fae 100644
--- a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/std/NestedTupleSourceRuntimeFactory.java
+++ b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/operators/std/NestedTupleSourceRuntimeFactory.java
@@ -35,13 +35,13 @@
     }
 
     @Override
-    public IPushRuntime createPushRuntime(IHyracksTaskContext ctx) {
+    public IPushRuntime createPushRuntime(IHyracksTaskContext ctx) throws HyracksDataException {
         return new NestedTupleSourceRuntime(ctx);
     }
 
     public static class NestedTupleSourceRuntime extends AbstractOneInputOneOutputOneFramePushRuntime {
 
-        public NestedTupleSourceRuntime(IHyracksTaskContext ctx) {
+        public NestedTupleSourceRuntime(IHyracksTaskContext ctx) throws HyracksDataException {
             initAccessAppend(ctx);
         }
 
diff --git a/algebricks/algebricks-tests/pom.xml b/algebricks/algebricks-tests/pom.xml
index 271083d..4d7abad 100644
--- a/algebricks/algebricks-tests/pom.xml
+++ b/algebricks/algebricks-tests/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -99,7 +99,7 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-compiler</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>junit</groupId>
@@ -110,17 +110,17 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-control-cc</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-control-nc</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-data-std</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/pom.xml b/algebricks/pom.xml
index 774b07d..427e29b 100644
--- a/algebricks/pom.xml
+++ b/algebricks/pom.xml
@@ -16,7 +16,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>algebricks</artifactId>
-  <version>0.2.7-SNAPSHOT</version>
+  <version>0.2.10-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>algebricks</name>
 
diff --git a/hivesterix/build.sh b/hivesterix/build.sh
new file mode 100644
index 0000000..8f61559
--- /dev/null
+++ b/hivesterix/build.sh
@@ -0,0 +1,12 @@
+rm -rf dist
+mkdir dist
+
+hadoop_versions=(0.20.2 0.23.1 0.23.6 1.0.4 cdh-4.1 cdh-4.2)
+cd ../
+for v in ${hadoop_versions[@]}
+do
+   #echo mvn clean package -DskipTests=true -Dhadoop=${v}
+   mvn clean package -DskipTests=true -Dhadoop=${v}
+   #echo mv hivesterix/hivesterix-dist/target/hivesterix-dist-*-binary-assembly.zip hivesterix/dist/hivesterix-dist-binary-assembley-hdfs-${v}.zip
+   mv hivesterix/hivesterix-dist/target/hivesterix-dist-*-binary-assembly.zip hivesterix/dist/hivesterix-dist-binary-assembley-hdfs-${v}.zip
+done
diff --git a/hivesterix/hivesterix-common/pom.xml b/hivesterix/hivesterix-common/pom.xml
index 7741193..fe9271b 100644
--- a/hivesterix/hivesterix-common/pom.xml
+++ b/hivesterix/hivesterix-common/pom.xml
@@ -1,18 +1,13 @@
 <?xml version="1.0"?>
-<!--
- ! 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.
- !-->
+<!-- ! 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. ! -->
 <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>hivesterix-common</artifactId>
@@ -21,7 +16,7 @@
 	<parent>
 		<artifactId>hivesterix</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -44,30 +39,54 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-hdfs-core</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-exec</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hivesterix-serde</artifactId>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 	</dependencies>
+
+	<repositories>
+		<repository>
+			<releases>
+				<enabled>true</enabled>
+				<updatePolicy>always</updatePolicy>
+				<checksumPolicy>warn</checksumPolicy>
+			</releases>
+			<snapshots>
+				<enabled>true</enabled>
+				<updatePolicy>always</updatePolicy>
+				<checksumPolicy>fail</checksumPolicy>
+			</snapshots>
+			<id>cdh-build</id>
+			<url>https://repository.cloudera.com/content/groups/cdh-build</url>
+		</repository>
+	</repositories>
 </project>
diff --git a/hivesterix/hivesterix-common/src/main/java/edu/uci/ics/hivesterix/logical/expression/ExpressionTranslator.java b/hivesterix/hivesterix-common/src/main/java/edu/uci/ics/hivesterix/logical/expression/ExpressionTranslator.java
index 783004c..2ec3811 100644
--- a/hivesterix/hivesterix-common/src/main/java/edu/uci/ics/hivesterix/logical/expression/ExpressionTranslator.java
+++ b/hivesterix/hivesterix-common/src/main/java/edu/uci/ics/hivesterix/logical/expression/ExpressionTranslator.java
@@ -12,212 +12,217 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.logical.expression;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import org.apache.commons.lang3.mutable.Mutable;
-import org.apache.hadoop.hive.ql.exec.FunctionInfo;
-import org.apache.hadoop.hive.ql.exec.FunctionRegistry;
-import org.apache.hadoop.hive.ql.plan.AggregationDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeColumnDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeFieldDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeNullDesc;
-import org.apache.hadoop.hive.ql.plan.UDTFDesc;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDTF;
-import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
-
-import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalExpressionTag;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AggregateFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ConstantExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ScalarFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.UnnestingFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
-import edu.uci.ics.hyracks.algebricks.core.algebra.functions.IFunctionInfo;
-
-public class ExpressionTranslator {
-
-    public static Object getHiveExpression(ILogicalExpression expr, IVariableTypeEnvironment env) throws Exception {
-        if (expr.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
-            /**
-             * function expression
-             */
-            AbstractFunctionCallExpression funcExpr = (AbstractFunctionCallExpression) expr;
-            IFunctionInfo funcInfo = funcExpr.getFunctionInfo();
-            FunctionIdentifier fid = funcInfo.getFunctionIdentifier();
-
-            if (fid.getName().equals(ExpressionConstant.FIELDACCESS)) {
-                Object info = ((HiveFunctionInfo) funcInfo).getInfo();
-                ExprNodeFieldDesc desc = (ExprNodeFieldDesc) info;
-                return new ExprNodeFieldDesc(desc.getTypeInfo(), desc.getDesc(), desc.getFieldName(), desc.getIsList());
-            }
-
-            if (fid.getName().equals(ExpressionConstant.NULL)) {
-                return new ExprNodeNullDesc();
-            }
-
-            /**
-             * argument expressions: translate argument expressions recursively
-             * first, this logic is shared in scalar, aggregation and unnesting
-             * function
-             */
-            List<Mutable<ILogicalExpression>> arguments = funcExpr.getArguments();
-            List<ExprNodeDesc> parameters = new ArrayList<ExprNodeDesc>();
-            for (Mutable<ILogicalExpression> argument : arguments) {
-                /**
-                 * parameters could not be aggregate function desc
-                 */
-                ExprNodeDesc parameter = (ExprNodeDesc) getHiveExpression(argument.getValue(), env);
-                parameters.add(parameter);
-            }
-
-            /**
-             * get expression
-             */
-            if (funcExpr instanceof ScalarFunctionCallExpression) {
-                String udfName = HiveAlgebricksBuiltInFunctionMap.INSTANCE.getHiveFunctionName(fid);
-                GenericUDF udf;
-                if (udfName != null) {
-                    /**
-                     * get corresponding function info for built-in functions
-                     */
-                    FunctionInfo fInfo = FunctionRegistry.getFunctionInfo(udfName);
-                    udf = fInfo.getGenericUDF();
-
-                    int inputSize = parameters.size();
-                    List<ExprNodeDesc> currentDescs = new ArrayList<ExprNodeDesc>();
-
-                    // generate expression tree if necessary
-                    while (inputSize > 2) {
-                        int pairs = inputSize / 2;
-                        for (int i = 0; i < pairs; i++) {
-                            List<ExprNodeDesc> descs = new ArrayList<ExprNodeDesc>();
-                            descs.add(parameters.get(2 * i));
-                            descs.add(parameters.get(2 * i + 1));
-                            ExprNodeDesc desc = ExprNodeGenericFuncDesc.newInstance(udf, descs);
-                            currentDescs.add(desc);
-                        }
-
-                        if (inputSize % 2 != 0) {
-                            // List<ExprNodeDesc> descs = new
-                            // ArrayList<ExprNodeDesc>();
-                            // ExprNodeDesc lastExpr =
-                            // currentDescs.remove(currentDescs.size() - 1);
-                            // descs.add(lastExpr);
-                            currentDescs.add(parameters.get(inputSize - 1));
-                            // ExprNodeDesc desc =
-                            // ExprNodeGenericFuncDesc.newInstance(udf, descs);
-                            // currentDescs.add(desc);
-                        }
-                        inputSize = currentDescs.size();
-                        parameters.clear();
-                        parameters.addAll(currentDescs);
-                        currentDescs.clear();
-                    }
-
-                } else {
-                    Object secondInfo = ((HiveFunctionInfo) funcInfo).getInfo();
-                    if (secondInfo != null) {
-
-                        /**
-                         * for GenericUDFBridge: we should not call get type of
-                         * this hive expression, because parameters may have
-                         * been changed!
-                         */
-                        ExprNodeGenericFuncDesc hiveExpr = (ExprNodeGenericFuncDesc) ((HiveFunctionInfo) funcInfo)
-                                .getInfo();
-                        udf = hiveExpr.getGenericUDF();
-                    } else {
-                        /**
-                         * for other generic UDF
-                         */
-                        Class<?> udfClass;
-                        try {
-                            udfClass = Class.forName(fid.getName());
-                            udf = (GenericUDF) udfClass.newInstance();
-                        } catch (Exception e) {
-                            e.printStackTrace();
-                            throw new AlgebricksException(e.getMessage());
-                        }
-                    }
-                }
-                /**
-                 * get hive generic function expression
-                 */
-                ExprNodeDesc desc = ExprNodeGenericFuncDesc.newInstance(udf, parameters);
-                return desc;
-            } else if (funcExpr instanceof AggregateFunctionCallExpression) {
-                /**
-                 * hive aggregation info
-                 */
-                AggregationDesc aggregateDesc = (AggregationDesc) ((HiveFunctionInfo) funcExpr.getFunctionInfo())
-                        .getInfo();
-                /**
-                 * set parameters
-                 */
-                aggregateDesc.setParameters((ArrayList<ExprNodeDesc>) parameters);
-
-                List<TypeInfo> originalParameterTypeInfos = new ArrayList<TypeInfo>();
-                for (ExprNodeDesc parameter : parameters) {
-                    if (parameter.getTypeInfo() instanceof StructTypeInfo) {
-                        originalParameterTypeInfos.add(TypeInfoFactory.doubleTypeInfo);
-                    } else
-                        originalParameterTypeInfos.add(parameter.getTypeInfo());
-                }
-
-                GenericUDAFEvaluator eval = FunctionRegistry.getGenericUDAFEvaluator(
-                        aggregateDesc.getGenericUDAFName(), originalParameterTypeInfos, aggregateDesc.getDistinct(),
-                        false);
-
-                AggregationDesc newAggregateDesc = new AggregationDesc(aggregateDesc.getGenericUDAFName(), eval,
-                        aggregateDesc.getParameters(), aggregateDesc.getDistinct(), aggregateDesc.getMode());
-                return newAggregateDesc;
-            } else if (funcExpr instanceof UnnestingFunctionCallExpression) {
-                /**
-                 * type inference for UDTF function
-                 */
-                UDTFDesc hiveDesc = (UDTFDesc) ((HiveFunctionInfo) funcExpr.getFunctionInfo()).getInfo();
-                String funcName = hiveDesc.getUDTFName();
-                FunctionInfo fi = FunctionRegistry.getFunctionInfo(funcName);
-                GenericUDTF udtf = fi.getGenericUDTF();
-                UDTFDesc desc = new UDTFDesc(udtf);
-                return desc;
-            } else {
-                throw new IllegalStateException("unrecognized function expression " + expr.getClass().getName());
-            }
-        } else if ((expr.getExpressionTag() == LogicalExpressionTag.VARIABLE)) {
-            /**
-             * get type for variable in the environment
-             */
-            VariableReferenceExpression varExpr = (VariableReferenceExpression) expr;
-            LogicalVariable var = varExpr.getVariableReference();
-            TypeInfo typeInfo = (TypeInfo) env.getVarType(var);
-            ExprNodeDesc desc = new ExprNodeColumnDesc(typeInfo, var.toString(), "", false);
-            return desc;
-        } else if ((expr.getExpressionTag() == LogicalExpressionTag.CONSTANT)) {
-            /**
-             * get expression for constant in the environment
-             */
-            ConstantExpression varExpr = (ConstantExpression) expr;
-            Object value = ((HivesterixConstantValue) varExpr.getValue()).getObject();
-            ExprNodeDesc desc = new ExprNodeConstantDesc(value);
-            return desc;
-        } else {
-            throw new IllegalStateException("illegal expressions " + expr.getClass().getName());
-        }
-    }
-}
+package edu.uci.ics.hivesterix.logical.expression;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.hadoop.hive.ql.exec.FunctionInfo;
+import org.apache.hadoop.hive.ql.exec.FunctionRegistry;
+import org.apache.hadoop.hive.ql.plan.AggregationDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeColumnDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeFieldDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeNullDesc;
+import org.apache.hadoop.hive.ql.plan.UDTFDesc;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDTF;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
+
+import edu.uci.ics.hivesterix.serde.lazy.LazyUtils;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalExpressionTag;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AggregateFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ConstantExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ScalarFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.UnnestingFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.IFunctionInfo;
+
+public class ExpressionTranslator {
+
+    public static Object getHiveExpression(ILogicalExpression expr, IVariableTypeEnvironment env) throws Exception {
+        if (expr.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
+            /**
+             * function expression
+             */
+            AbstractFunctionCallExpression funcExpr = (AbstractFunctionCallExpression) expr;
+            IFunctionInfo funcInfo = funcExpr.getFunctionInfo();
+            FunctionIdentifier fid = funcInfo.getFunctionIdentifier();
+
+            if (fid.getName().equals(ExpressionConstant.FIELDACCESS)) {
+                Object info = ((HiveFunctionInfo) funcInfo).getInfo();
+                ExprNodeFieldDesc desc = (ExprNodeFieldDesc) info;
+                return new ExprNodeFieldDesc(desc.getTypeInfo(), desc.getDesc(), desc.getFieldName(), desc.getIsList());
+            }
+
+            if (fid.getName().equals(ExpressionConstant.NULL)) {
+                return new ExprNodeNullDesc();
+            }
+
+            /**
+             * argument expressions: translate argument expressions recursively
+             * first, this logic is shared in scalar, aggregation and unnesting
+             * function
+             */
+            List<Mutable<ILogicalExpression>> arguments = funcExpr.getArguments();
+            List<ExprNodeDesc> parameters = new ArrayList<ExprNodeDesc>();
+            for (Mutable<ILogicalExpression> argument : arguments) {
+                /**
+                 * parameters could not be aggregate function desc
+                 */
+                ExprNodeDesc parameter = (ExprNodeDesc) getHiveExpression(argument.getValue(), env);
+                parameters.add(parameter);
+            }
+
+            /**
+             * get expression
+             */
+            if (funcExpr instanceof ScalarFunctionCallExpression) {
+                String udfName = HiveAlgebricksBuiltInFunctionMap.INSTANCE.getHiveFunctionName(fid);
+                GenericUDF udf;
+                if (udfName != null) {
+                    /**
+                     * get corresponding function info for built-in functions
+                     */
+                    FunctionInfo fInfo = FunctionRegistry.getFunctionInfo(udfName);
+                    udf = fInfo.getGenericUDF();
+
+                    int inputSize = parameters.size();
+                    List<ExprNodeDesc> currentDescs = new ArrayList<ExprNodeDesc>();
+
+                    // generate expression tree if necessary
+                    while (inputSize > 2) {
+                        int pairs = inputSize / 2;
+                        for (int i = 0; i < pairs; i++) {
+                            List<ExprNodeDesc> descs = new ArrayList<ExprNodeDesc>();
+                            descs.add(parameters.get(2 * i));
+                            descs.add(parameters.get(2 * i + 1));
+                            ExprNodeDesc desc = ExprNodeGenericFuncDesc.newInstance(udf, descs);
+                            currentDescs.add(desc);
+                        }
+
+                        if (inputSize % 2 != 0) {
+                            // List<ExprNodeDesc> descs = new
+                            // ArrayList<ExprNodeDesc>();
+                            // ExprNodeDesc lastExpr =
+                            // currentDescs.remove(currentDescs.size() - 1);
+                            // descs.add(lastExpr);
+                            currentDescs.add(parameters.get(inputSize - 1));
+                            // ExprNodeDesc desc =
+                            // ExprNodeGenericFuncDesc.newInstance(udf, descs);
+                            // currentDescs.add(desc);
+                        }
+                        inputSize = currentDescs.size();
+                        parameters.clear();
+                        parameters.addAll(currentDescs);
+                        currentDescs.clear();
+                    }
+
+                } else {
+                    Object secondInfo = ((HiveFunctionInfo) funcInfo).getInfo();
+                    if (secondInfo != null) {
+
+                        /**
+                         * for GenericUDFBridge: we should not call get type of
+                         * this hive expression, because parameters may have
+                         * been changed!
+                         */
+                        ExprNodeGenericFuncDesc hiveExpr = (ExprNodeGenericFuncDesc) ((HiveFunctionInfo) funcInfo)
+                                .getInfo();
+                        udf = hiveExpr.getGenericUDF();
+                    } else {
+                        /**
+                         * for other generic UDF
+                         */
+                        Class<?> udfClass;
+                        try {
+                            udfClass = Class.forName(fid.getName());
+                            udf = (GenericUDF) udfClass.newInstance();
+                        } catch (Exception e) {
+                            e.printStackTrace();
+                            throw new AlgebricksException(e.getMessage());
+                        }
+                    }
+                }
+                /**
+                 * get hive generic function expression
+                 */
+                ExprNodeDesc desc = ExprNodeGenericFuncDesc.newInstance(udf, parameters);
+                return desc;
+            } else if (funcExpr instanceof AggregateFunctionCallExpression) {
+                /**
+                 * hive aggregation info
+                 */
+                AggregationDesc aggregateDesc = (AggregationDesc) ((HiveFunctionInfo) funcExpr.getFunctionInfo())
+                        .getInfo();
+                /**
+                 * set parameters
+                 */
+                aggregateDesc.setParameters((ArrayList<ExprNodeDesc>) parameters);
+
+                List<TypeInfo> originalParameterTypeInfos = new ArrayList<TypeInfo>();
+                for (ExprNodeDesc parameter : parameters) {
+                    if (parameter.getTypeInfo() instanceof StructTypeInfo) {
+                        originalParameterTypeInfos.add(TypeInfoFactory.doubleTypeInfo);
+                    } else
+                        originalParameterTypeInfos.add(parameter.getTypeInfo());
+                }
+
+                List<ObjectInspector> originalParameterOIs = new ArrayList<ObjectInspector>();
+                for (TypeInfo type : originalParameterTypeInfos) {
+                    originalParameterOIs.add(LazyUtils.getLazyObjectInspectorFromTypeInfo(type, false));
+                }
+                GenericUDAFEvaluator eval = FunctionRegistry.getGenericUDAFEvaluator(
+                        aggregateDesc.getGenericUDAFName(), originalParameterOIs, aggregateDesc.getDistinct(), false);
+
+                AggregationDesc newAggregateDesc = new AggregationDesc(aggregateDesc.getGenericUDAFName(), eval,
+                        aggregateDesc.getParameters(), aggregateDesc.getDistinct(), aggregateDesc.getMode());
+                return newAggregateDesc;
+            } else if (funcExpr instanceof UnnestingFunctionCallExpression) {
+                /**
+                 * type inference for UDTF function
+                 */
+                UDTFDesc hiveDesc = (UDTFDesc) ((HiveFunctionInfo) funcExpr.getFunctionInfo()).getInfo();
+                String funcName = hiveDesc.getUDTFName();
+                FunctionInfo fi = FunctionRegistry.getFunctionInfo(funcName);
+                GenericUDTF udtf = fi.getGenericUDTF();
+                UDTFDesc desc = new UDTFDesc(udtf);
+                return desc;
+            } else {
+                throw new IllegalStateException("unrecognized function expression " + expr.getClass().getName());
+            }
+        } else if ((expr.getExpressionTag() == LogicalExpressionTag.VARIABLE)) {
+            /**
+             * get type for variable in the environment
+             */
+            VariableReferenceExpression varExpr = (VariableReferenceExpression) expr;
+            LogicalVariable var = varExpr.getVariableReference();
+            TypeInfo typeInfo = (TypeInfo) env.getVarType(var);
+            ExprNodeDesc desc = new ExprNodeColumnDesc(typeInfo, var.toString(), "", false);
+            return desc;
+        } else if ((expr.getExpressionTag() == LogicalExpressionTag.CONSTANT)) {
+            /**
+             * get expression for constant in the environment
+             */
+            ConstantExpression varExpr = (ConstantExpression) expr;
+            Object value = ((HivesterixConstantValue) varExpr.getValue()).getObject();
+            ExprNodeDesc desc = new ExprNodeConstantDesc(value);
+            return desc;
+        } else {
+            throw new IllegalStateException("illegal expressions " + expr.getClass().getName());
+        }
+    }
+}
diff --git a/hivesterix/hivesterix-dist/pom.xml b/hivesterix/hivesterix-dist/pom.xml
index 2adcc7c..917487f 100644
--- a/hivesterix/hivesterix-dist/pom.xml
+++ b/hivesterix/hivesterix-dist/pom.xml
@@ -1,29 +1,22 @@
-<!--
- ! 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.
- !-->
+<!-- ! 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. ! -->
 <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>hivesterix-dist</artifactId>
-	<version>0.2.7-SNAPSHOT</version>
 	<name>hivesterix-dist</name>
 
 	<parent>
-                <groupId>edu.uci.ics.hyracks</groupId>
-                <artifactId>hivesterix</artifactId>
-                <version>0.2.7-SNAPSHOT</version>
-        </parent>
+		<groupId>edu.uci.ics.hyracks</groupId>
+		<artifactId>hivesterix</artifactId>
+		<version>0.2.10-SNAPSHOT</version>
+	</parent>
 
 	<dependencies>
 		<dependency>
@@ -34,298 +27,37 @@
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>junit</groupId>
-			<artifactId>junit</artifactId>
-			<version>4.8.1</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>args4j</groupId>
-			<artifactId>args4j</artifactId>
-			<version>2.0.12</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.json</groupId>
-			<artifactId>json</artifactId>
-			<version>20090211</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.eclipse.jetty</groupId>
-			<artifactId>jetty-server</artifactId>
-			<version>8.0.0.M1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.eclipse.jetty</groupId>
-			<artifactId>jetty-servlet</artifactId>
-			<version>8.0.0.M1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>jline</groupId>
-			<artifactId>jline</artifactId>
-			<version>0.9.94</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-core</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-connectionpool</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-enhancer</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-rdbms</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-dbcp</groupId>
-			<artifactId>commons-dbcp</artifactId>
-			<version>1.4</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-pool</groupId>
-			<artifactId>commons-pool</artifactId>
-			<version>1.5.4</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-collections</groupId>
-			<artifactId>commons-collections</artifactId>
-			<version>3.2.1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-lang</groupId>
-			<artifactId>commons-lang</artifactId>
-			<version>2.4</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>javax</groupId>
-			<artifactId>jdo2-api</artifactId>
-			<version>2.3-ec</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>com.facebook</groupId>
-			<artifactId>libfb303</artifactId>
-			<version>0.5.0</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.thrift</groupId>
-			<artifactId>libthrift</artifactId>
-			<version>0.5.0</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.commons</groupId>
-			<artifactId>cli</artifactId>
-			<version>1.2</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache</groupId>
-			<artifactId>log4j</artifactId>
-			<version>1.2.15</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.antlr</groupId>
-			<artifactId>antlr-runtime</artifactId>
-			<version>3.0.1</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-cli</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-common</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-exec</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-hwi</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-jdbc</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-metastore</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-service</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-shims</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-serde</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.slf4j</groupId>
-			<artifactId>slf4j-api</artifactId>
-			<version>1.6.1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-cli</groupId>
-			<artifactId>commons-cli</artifactId>
-			<version>1.2</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.slf4j</groupId>
-			<artifactId>slf4j-log4j12</artifactId>
-			<version>1.6.1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-logging</groupId>
-			<artifactId>commons-logging</artifactId>
-			<version>1.1.1</version>
-			<type>jar</type>
-			<classifier>api</classifier>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>com.google.guava</groupId>
-			<artifactId>guava</artifactId>
-			<version>r06</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.antlr</groupId>
-			<artifactId>stringtemplate</artifactId>
-			<version>3.2</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.derby</groupId>
-			<artifactId>derby</artifactId>
-			<version>10.8.1.2</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop</groupId>
-			<artifactId>hadoop-core</artifactId>
-			<version>0.20.2</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-translator</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-optimizer</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hbase</groupId>
-			<artifactId>hbase</artifactId>
-			<version>0.90.3</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -476,6 +208,23 @@
 				</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>
 				<artifactId>maven-clean-plugin</artifactId>
 				<version>2.5</version>
 				<configuration>
diff --git a/hivesterix/hivesterix-dist/src/main/assembly/binary-assembly.xml b/hivesterix/hivesterix-dist/src/main/assembly/binary-assembly.xml
index aeb3fb4..e2da26a 100755
--- a/hivesterix/hivesterix-dist/src/main/assembly/binary-assembly.xml
+++ b/hivesterix/hivesterix-dist/src/main/assembly/binary-assembly.xml
@@ -1,17 +1,12 @@
-<!--
- ! 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.
- !-->
+<!-- ! 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. ! -->
 <assembly>
 	<id>binary-assembly</id>
 	<formats>
@@ -21,20 +16,30 @@
 	<includeBaseDirectory>false</includeBaseDirectory>
 	<fileSets>
 		<fileSet>
-			<directory>target/appassembler/bin</directory>
+			<directory>src/main/resources/conf</directory>
+			<outputDirectory>conf</outputDirectory>
+			<fileMode>0755</fileMode>
+		</fileSet>
+		<fileSet>
+			<directory>src/main/resources/scripts</directory>
 			<outputDirectory>bin</outputDirectory>
 			<fileMode>0755</fileMode>
 		</fileSet>
 		<fileSet>
 			<directory>target/appassembler/lib</directory>
 			<outputDirectory>lib</outputDirectory>
+			<includes>
+				<include>*.jar</include>
+			</includes>
+			<fileMode>0755</fileMode>
 		</fileSet>
 		<fileSet>
 			<directory>target</directory>
 			<outputDirectory>lib</outputDirectory>
 			<includes>
-				<include>*.jar</include>
+				<include>a-hive-patch.jar</include>
 			</includes>
+			<fileMode>0755</fileMode>
 		</fileSet>
 	</fileSets>
-</assembly>
+</assembly>
\ No newline at end of file
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 0c2416d..7b88de4 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
@@ -12,598 +12,615 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.runtime.exec;
-
-import java.io.BufferedReader;
-import java.io.FileInputStream;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.PrintWriter;
-import java.io.Serializable;
-import java.net.InetAddress;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Properties;
-import java.util.Set;
-
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-import org.apache.hadoop.hive.conf.HiveConf;
-import org.apache.hadoop.hive.ql.exec.ConditionalTask;
-import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
-import org.apache.hadoop.hive.ql.exec.MapRedTask;
-import org.apache.hadoop.hive.ql.exec.Operator;
-import org.apache.hadoop.hive.ql.exec.TableScanOperator;
-import org.apache.hadoop.hive.ql.exec.Task;
-import org.apache.hadoop.hive.ql.plan.DynamicPartitionCtx;
-import org.apache.hadoop.hive.ql.plan.FetchWork;
-import org.apache.hadoop.hive.ql.plan.FileSinkDesc;
-import org.apache.hadoop.hive.ql.plan.MapredLocalWork;
-import org.apache.hadoop.hive.ql.plan.MapredWork;
-import org.apache.hadoop.hive.ql.plan.PartitionDesc;
-import org.apache.hadoop.hive.ql.plan.TableScanDesc;
-
-import edu.uci.ics.hivesterix.common.config.ConfUtil;
-import edu.uci.ics.hivesterix.logical.expression.HiveExpressionTypeComputer;
-import edu.uci.ics.hivesterix.logical.expression.HiveMergeAggregationExpressionFactory;
-import edu.uci.ics.hivesterix.logical.expression.HiveNullableTypeComputer;
-import edu.uci.ics.hivesterix.logical.expression.HivePartialAggregationTypeComputer;
-import edu.uci.ics.hivesterix.logical.plan.HiveAlgebricksTranslator;
-import edu.uci.ics.hivesterix.logical.plan.HiveLogicalPlanAndMetaData;
-import edu.uci.ics.hivesterix.optimizer.rulecollections.HiveRuleCollections;
-import edu.uci.ics.hivesterix.runtime.factory.evaluator.HiveExpressionRuntimeProvider;
-import edu.uci.ics.hivesterix.runtime.factory.nullwriter.HiveNullWriterFactory;
-import edu.uci.ics.hivesterix.runtime.inspector.HiveBinaryBooleanInspectorFactory;
-import edu.uci.ics.hivesterix.runtime.inspector.HiveBinaryIntegerInspectorFactory;
-import edu.uci.ics.hivesterix.runtime.jobgen.HiveConnectorPolicyAssignmentPolicy;
-import edu.uci.ics.hivesterix.runtime.jobgen.HiveConnectorPolicyAssignmentPolicy.Policy;
-import edu.uci.ics.hivesterix.runtime.provider.HiveBinaryComparatorFactoryProvider;
-import edu.uci.ics.hivesterix.runtime.provider.HiveBinaryHashFunctionFactoryProvider;
-import edu.uci.ics.hivesterix.runtime.provider.HiveBinaryHashFunctionFamilyProvider;
-import edu.uci.ics.hivesterix.runtime.provider.HiveNormalizedKeyComputerFactoryProvider;
-import edu.uci.ics.hivesterix.runtime.provider.HivePrinterFactoryProvider;
-import edu.uci.ics.hivesterix.runtime.provider.HiveSerializerDeserializerProvider;
-import edu.uci.ics.hivesterix.runtime.provider.HiveTypeTraitProvider;
-import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksAbsolutePartitionConstraint;
-import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
-import edu.uci.ics.hyracks.algebricks.common.utils.Pair;
-import edu.uci.ics.hyracks.algebricks.compiler.api.HeuristicCompilerFactoryBuilder;
-import edu.uci.ics.hyracks.algebricks.compiler.api.HeuristicCompilerFactoryBuilder.DefaultOptimizationContextFactory;
-import edu.uci.ics.hyracks.algebricks.compiler.api.ICompiler;
-import edu.uci.ics.hyracks.algebricks.compiler.api.ICompilerFactory;
-import edu.uci.ics.hyracks.algebricks.compiler.rewriter.rulecontrollers.SequentialFixpointRuleController;
-import edu.uci.ics.hyracks.algebricks.compiler.rewriter.rulecontrollers.SequentialOnceRuleController;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalPlan;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalPlanAndMetadata;
-import edu.uci.ics.hyracks.algebricks.core.algebra.prettyprint.LogicalOperatorPrettyPrintVisitor;
-import edu.uci.ics.hyracks.algebricks.core.algebra.prettyprint.PlanPrettyPrinter;
-import edu.uci.ics.hyracks.algebricks.core.rewriter.base.AbstractRuleController;
-import edu.uci.ics.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule;
-import edu.uci.ics.hyracks.algebricks.core.rewriter.base.PhysicalOptimizationConfig;
-import edu.uci.ics.hyracks.api.client.HyracksConnection;
-import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
-import edu.uci.ics.hyracks.api.job.JobId;
-import edu.uci.ics.hyracks.api.job.JobSpecification;
-
-@SuppressWarnings({ "rawtypes", "unchecked" })
-public class HyracksExecutionEngine implements IExecutionEngine {
-
-    private static final Log LOG = LogFactory.getLog(HyracksExecutionEngine.class.getName());
-    private static final String clusterPropertiesPath = "conf/cluster.properties";
-    private static final String masterFilePath = "conf/master";
-
-    private static List<Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>> DEFAULT_LOGICAL_REWRITES = new ArrayList<Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>>();
-    private static List<Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>> DEFAULT_PHYSICAL_REWRITES = new ArrayList<Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>>();
-    static {
-        SequentialFixpointRuleController seqCtrlNoDfs = new SequentialFixpointRuleController(false);
-        SequentialFixpointRuleController seqCtrlFullDfs = new SequentialFixpointRuleController(true);
-        SequentialOnceRuleController seqOnceCtrl = new SequentialOnceRuleController(true);
-        DEFAULT_LOGICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqCtrlFullDfs,
-                HiveRuleCollections.NORMALIZATION));
-        DEFAULT_LOGICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqCtrlNoDfs,
-                HiveRuleCollections.COND_PUSHDOWN_AND_JOIN_INFERENCE));
-        DEFAULT_LOGICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqCtrlFullDfs,
-                HiveRuleCollections.LOAD_FIELDS));
-        DEFAULT_LOGICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqCtrlNoDfs,
-                HiveRuleCollections.OP_PUSHDOWN));
-        DEFAULT_LOGICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqOnceCtrl,
-                HiveRuleCollections.DATA_EXCHANGE));
-        DEFAULT_LOGICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqCtrlNoDfs,
-                HiveRuleCollections.CONSOLIDATION));
-
-        DEFAULT_PHYSICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqOnceCtrl,
-                HiveRuleCollections.PHYSICAL_PLAN_REWRITES));
-        DEFAULT_PHYSICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqOnceCtrl,
-                HiveRuleCollections.prepareJobGenRules));
-    }
-
-    /**
-     * static configurations for compiler
-     */
-    private HeuristicCompilerFactoryBuilder builder;
-
-    /**
-     * compiler
-     */
-    private ICompiler compiler;
-
-    /**
-     * physical optimization config
-     */
-    private PhysicalOptimizationConfig physicalOptimizationConfig;
-
-    /**
-     * final ending operators
-     */
-    private List<Operator> leaveOps = new ArrayList<Operator>();
-
-    /**
-     * tasks that are already visited
-     */
-    private Map<Task<? extends Serializable>, Boolean> tasksVisited = new HashMap<Task<? extends Serializable>, Boolean>();
-
-    /**
-     * hyracks job spec
-     */
-    private JobSpecification jobSpec;
-
-    /**
-     * hive configuration
-     */
-    private HiveConf conf;
-
-    /**
-     * plan printer
-     */
-    private PrintWriter planPrinter;
-
-    /**
-     * properties
-     */
-    private Properties clusterProps;
-
-    /**
-     * the Hyracks client connection
-     */
-    private IHyracksClientConnection hcc;
-
-    public HyracksExecutionEngine(HiveConf conf) {
-        this.conf = conf;
-        init(conf);
-    }
-
-    public HyracksExecutionEngine(HiveConf conf, PrintWriter planPrinter) {
-        this.conf = conf;
-        this.planPrinter = planPrinter;
-        init(conf);
-    }
-
-    private void init(HiveConf conf) {
-        builder = new HeuristicCompilerFactoryBuilder(DefaultOptimizationContextFactory.INSTANCE);
-        builder.setLogicalRewrites(DEFAULT_LOGICAL_REWRITES);
-        builder.setPhysicalRewrites(DEFAULT_PHYSICAL_REWRITES);
-        builder.setIMergeAggregationExpressionFactory(HiveMergeAggregationExpressionFactory.INSTANCE);
-        builder.setExpressionTypeComputer(HiveExpressionTypeComputer.INSTANCE);
-        builder.setNullableTypeComputer(HiveNullableTypeComputer.INSTANCE);
-
-        long memSizeExternalGby = conf.getLong("hive.algebricks.groupby.external.memory", 268435456);
-        long memSizeExternalSort = conf.getLong("hive.algebricks.sort.memory", 536870912);
-        int frameSize = conf.getInt("hive.algebricks.framesize", 32768);
-
-        physicalOptimizationConfig = new PhysicalOptimizationConfig();
-        int frameLimitExtGby = (int) (memSizeExternalGby / frameSize);
-        physicalOptimizationConfig.setMaxFramesExternalGroupBy(frameLimitExtGby);
-        int frameLimitExtSort = (int) (memSizeExternalSort / frameSize);
-        physicalOptimizationConfig.setMaxFramesExternalSort(frameLimitExtSort);
-        builder.setPhysicalOptimizationConfig(physicalOptimizationConfig);
-    }
-
-    @Override
-    public int compileJob(List<Task<? extends Serializable>> rootTasks) {
-        // clean up
-        leaveOps.clear();
-        tasksVisited.clear();
-        jobSpec = null;
-
-        HashMap<String, PartitionDesc> aliasToPath = new HashMap<String, PartitionDesc>();
-        List<Operator> rootOps = generateRootOperatorDAG(rootTasks, aliasToPath);
-
-        // get all leave Ops
-        getLeaves(rootOps, leaveOps);
-
-        HiveAlgebricksTranslator translator = new HiveAlgebricksTranslator();
-        try {
-            translator.translate(rootOps, null, aliasToPath);
-
-            ILogicalPlan plan = translator.genLogicalPlan();
-
-            if (plan.getRoots() != null && plan.getRoots().size() > 0 && plan.getRoots().get(0).getValue() != null) {
-                translator.printOperators();
-                ILogicalPlanAndMetadata planAndMetadata = new HiveLogicalPlanAndMetaData(plan,
-                        translator.getMetadataProvider());
-
-                ICompilerFactory compilerFactory = builder.create();
-                compiler = compilerFactory.createCompiler(planAndMetadata.getPlan(),
-                        planAndMetadata.getMetadataProvider(), translator.getVariableCounter());
-
-                // run optimization and re-writing rules for Hive plan
-                compiler.optimize();
-
-                // print optimized plan
-                LogicalOperatorPrettyPrintVisitor pvisitor = new LogicalOperatorPrettyPrintVisitor();
-                StringBuilder buffer = new StringBuilder();
-                PlanPrettyPrinter.printPlan(plan, buffer, pvisitor, 0);
-                String planStr = buffer.toString();
-                System.out.println(planStr);
-
-                if (planPrinter != null)
-                    planPrinter.print(planStr);
-            }
-        } catch (Exception e) {
-            e.printStackTrace();
-            return 1;
-        }
-
-        return 0;
-    }
-
-    private void codeGen() throws AlgebricksException {
-        try {
-            // number of cpu cores in the cluster
-            builder.setClusterLocations(new AlgebricksAbsolutePartitionConstraint(ConfUtil.getNCs()));
-        } catch (Exception e) {
-            throw new AlgebricksException(e);
-        }
-        // builder.setClusterTopology(ConfUtil.getClusterTopology());
-        builder.setBinaryBooleanInspectorFactory(HiveBinaryBooleanInspectorFactory.INSTANCE);
-        builder.setBinaryIntegerInspectorFactory(HiveBinaryIntegerInspectorFactory.INSTANCE);
-        builder.setComparatorFactoryProvider(HiveBinaryComparatorFactoryProvider.INSTANCE);
-        builder.setExpressionRuntimeProvider(HiveExpressionRuntimeProvider.INSTANCE);
-        builder.setHashFunctionFactoryProvider(HiveBinaryHashFunctionFactoryProvider.INSTANCE);
-        builder.setPrinterProvider(HivePrinterFactoryProvider.INSTANCE);
-        builder.setSerializerDeserializerProvider(HiveSerializerDeserializerProvider.INSTANCE);
-        builder.setNullWriterFactory(HiveNullWriterFactory.INSTANCE);
-        builder.setNormalizedKeyComputerFactoryProvider(HiveNormalizedKeyComputerFactoryProvider.INSTANCE);
-        builder.setPartialAggregationTypeComputer(HivePartialAggregationTypeComputer.INSTANCE);
-        builder.setTypeTraitProvider(HiveTypeTraitProvider.INSTANCE);
-        builder.setHashFunctionFamilyProvider(HiveBinaryHashFunctionFamilyProvider.INSTANCE);
-
-        jobSpec = compiler.createJob(null, null);
-
-        // set the policy
-        String policyStr = conf.get("hive.hyracks.connectorpolicy");
-        if (policyStr == null)
-            policyStr = "PIPELINING";
-        Policy policyValue = Policy.valueOf(policyStr);
-        jobSpec.setConnectorPolicyAssignmentPolicy(new HiveConnectorPolicyAssignmentPolicy(policyValue));
-        jobSpec.setUseConnectorPolicyForScheduling(false);
-    }
-
-    @Override
-    public int executeJob() {
-        try {
-            codeGen();
-            executeHyracksJob(jobSpec);
-        } catch (Exception e) {
-            e.printStackTrace();
-            return 1;
-        }
-        return 0;
-    }
-
-    private List<Operator> generateRootOperatorDAG(List<Task<? extends Serializable>> rootTasks,
-            HashMap<String, PartitionDesc> aliasToPath) {
-
-        List<Operator> rootOps = new ArrayList<Operator>();
-        List<Task<? extends Serializable>> toDelete = new ArrayList<Task<? extends Serializable>>();
-        tasksVisited.clear();
-
-        for (int i = rootTasks.size() - 1; i >= 0; i--) {
-            /**
-             * list of map-reduce tasks
-             */
-            Task<? extends Serializable> task = rootTasks.get(i);
-
-            if (task instanceof MapRedTask) {
-                List<Operator> mapRootOps = articulateMapReduceOperators(task, rootOps, aliasToPath, rootTasks);
-                if (i == 0)
-                    rootOps.addAll(mapRootOps);
-                else {
-                    List<Operator> leaves = new ArrayList<Operator>();
-                    getLeaves(rootOps, leaves);
-
-                    List<Operator> mapChildren = new ArrayList<Operator>();
-                    for (Operator childMap : mapRootOps) {
-                        if (childMap instanceof TableScanOperator) {
-                            TableScanDesc topDesc = (TableScanDesc) childMap.getConf();
-                            if (topDesc == null)
-                                mapChildren.add(childMap);
-                            else {
-                                rootOps.add(childMap);
-                            }
-                        } else
-                            mapChildren.add(childMap);
-                    }
-
-                    if (mapChildren.size() > 0) {
-                        for (Operator leaf : leaves)
-                            leaf.setChildOperators(mapChildren);
-                        for (Operator child : mapChildren)
-                            child.setParentOperators(leaves);
-                    }
-                }
-
-                MapredWork mr = (MapredWork) task.getWork();
-                HashMap<String, PartitionDesc> map = mr.getAliasToPartnInfo();
-
-                addAliasToPartition(aliasToPath, map);
-                toDelete.add(task);
-            }
-        }
-
-        for (Task<? extends Serializable> task : toDelete)
-            rootTasks.remove(task);
-
-        return rootOps;
-    }
-
-    private void addAliasToPartition(HashMap<String, PartitionDesc> aliasToPath, HashMap<String, PartitionDesc> map) {
-        Iterator<String> keys = map.keySet().iterator();
-        while (keys.hasNext()) {
-            String key = keys.next();
-            PartitionDesc part = map.get(key);
-            String[] names = key.split(":");
-            for (String name : names) {
-                aliasToPath.put(name, part);
-            }
-        }
-    }
-
-    private List<Operator> articulateMapReduceOperators(Task task, List<Operator> rootOps,
-            HashMap<String, PartitionDesc> aliasToPath, List<Task<? extends Serializable>> rootTasks) {
-        // System.out.println("!"+task.getName());
-        if (!(task instanceof MapRedTask)) {
-            if (!(task instanceof ConditionalTask)) {
-                rootTasks.add(task);
-                return null;
-            } else {
-                // remove map-reduce branches in condition task
-                ConditionalTask condition = (ConditionalTask) task;
-                List<Task<? extends Serializable>> branches = condition.getListTasks();
-                for (int i = branches.size() - 1; i >= 0; i--) {
-                    Task branch = branches.get(i);
-                    if (branch instanceof MapRedTask) {
-                        return articulateMapReduceOperators(branch, rootOps, aliasToPath, rootTasks);
-                    }
-                }
-                rootTasks.add(task);
-                return null;
-            }
-        }
-
-        MapredWork mr = (MapredWork) task.getWork();
-        HashMap<String, PartitionDesc> map = mr.getAliasToPartnInfo();
-
-        // put all aliasToParitionDesc mapping into the map
-        addAliasToPartition(aliasToPath, map);
-
-        MapRedTask mrtask = (MapRedTask) task;
-        MapredWork work = (MapredWork) mrtask.getWork();
-        HashMap<String, Operator<? extends Serializable>> operators = work.getAliasToWork();
-
-        Set entries = operators.entrySet();
-        Iterator<Entry<String, Operator>> iterator = entries.iterator();
-        List<Operator> mapRootOps = new ArrayList<Operator>();
-
-        // get map root operators
-        while (iterator.hasNext()) {
-            Operator next = iterator.next().getValue();
-            if (!mapRootOps.contains(next)) {
-                // clear that only for the case of union
-                mapRootOps.add(next);
-            }
-        }
-
-        // get map local work
-        MapredLocalWork localWork = work.getMapLocalWork();
-        if (localWork != null) {
-            HashMap<String, Operator<? extends Serializable>> localOperators = localWork.getAliasToWork();
-
-            Set localEntries = localOperators.entrySet();
-            Iterator<Entry<String, Operator>> localIterator = localEntries.iterator();
-            while (localIterator.hasNext()) {
-                mapRootOps.add(localIterator.next().getValue());
-            }
-
-            HashMap<String, FetchWork> localFetch = localWork.getAliasToFetchWork();
-            Set localFetchEntries = localFetch.entrySet();
-            Iterator<Entry<String, FetchWork>> localFetchIterator = localFetchEntries.iterator();
-            while (localFetchIterator.hasNext()) {
-                Entry<String, FetchWork> fetchMap = localFetchIterator.next();
-                FetchWork fetch = fetchMap.getValue();
-                String alias = fetchMap.getKey();
-                List<PartitionDesc> dirPart = fetch.getPartDesc();
-
-                // temporary hack: put the first partitionDesc into the map
-                aliasToPath.put(alias, dirPart.get(0));
-            }
-        }
-
-        Boolean visited = tasksVisited.get(task);
-        if (visited != null && visited.booleanValue() == true) {
-            return mapRootOps;
-        }
-
-        // do that only for union operator
-        for (Operator op : mapRootOps)
-            if (op.getParentOperators() != null)
-                op.getParentOperators().clear();
-
-        List<Operator> mapLeaves = new ArrayList<Operator>();
-        downToLeaves(mapRootOps, mapLeaves);
-        List<Operator> reduceOps = new ArrayList<Operator>();
-
-        if (work.getReducer() != null)
-            reduceOps.add(work.getReducer());
-
-        for (Operator mapLeaf : mapLeaves) {
-            mapLeaf.setChildOperators(reduceOps);
-        }
-
-        for (Operator reduceOp : reduceOps) {
-            if (reduceOp != null)
-                reduceOp.setParentOperators(mapLeaves);
-        }
-
-        List<Operator> leafs = new ArrayList<Operator>();
-        if (reduceOps.size() > 0) {
-            downToLeaves(reduceOps, leafs);
-        } else {
-            leafs = mapLeaves;
-        }
-
-        List<Operator> mapChildren = new ArrayList<Operator>();
-        if (task.getChildTasks() != null && task.getChildTasks().size() > 0) {
-            for (Object child : task.getChildTasks()) {
-                List<Operator> childMapOps = articulateMapReduceOperators((Task) child, rootOps, aliasToPath, rootTasks);
-                if (childMapOps == null)
-                    continue;
-
-                for (Operator childMap : childMapOps) {
-                    if (childMap instanceof TableScanOperator) {
-                        TableScanDesc topDesc = (TableScanDesc) childMap.getConf();
-                        if (topDesc == null)
-                            mapChildren.add(childMap);
-                        else {
-                            rootOps.add(childMap);
-                        }
-                    } else {
-                        // if not table scan, add the child
-                        mapChildren.add(childMap);
-                    }
-                }
-            }
-
-            if (mapChildren.size() > 0) {
-                int i = 0;
-                for (Operator leaf : leafs) {
-                    if (leaf.getChildOperators() == null || leaf.getChildOperators().size() == 0)
-                        leaf.setChildOperators(new ArrayList<Operator>());
-                    leaf.getChildOperators().add(mapChildren.get(i));
-                    i++;
-                }
-                i = 0;
-                for (Operator child : mapChildren) {
-                    if (child.getParentOperators() == null || child.getParentOperators().size() == 0)
-                        child.setParentOperators(new ArrayList<Operator>());
-                    child.getParentOperators().add(leafs.get(i));
-                    i++;
-                }
-            }
-        }
-
-        // mark this task as visited
-        this.tasksVisited.put(task, true);
-        return mapRootOps;
-    }
-
-    /**
-     * down to leaf nodes
-     * 
-     * @param ops
-     * @param leaves
-     */
-    private void downToLeaves(List<Operator> ops, List<Operator> leaves) {
-
-        // Operator currentOp;
-        for (Operator op : ops) {
-            if (op != null && op.getChildOperators() != null && op.getChildOperators().size() > 0) {
-                downToLeaves(op.getChildOperators(), leaves);
-            } else {
-                if (op != null && leaves.indexOf(op) < 0)
-                    leaves.add(op);
-            }
-        }
-    }
-
-    private void getLeaves(List<Operator> roots, List<Operator> currentLeaves) {
-        for (Operator op : roots) {
-            List<Operator> children = op.getChildOperators();
-            if (children == null || children.size() <= 0) {
-                currentLeaves.add(op);
-            } else {
-                getLeaves(children, currentLeaves);
-            }
-        }
-    }
-
-    private void executeHyracksJob(JobSpecification job) throws Exception {
-
-        /**
-         * load the properties file if it is not loaded
-         */
-        if (clusterProps == null) {
-            clusterProps = new Properties();
-            InputStream confIn = new FileInputStream(clusterPropertiesPath);
-            clusterProps.load(confIn);
-            confIn.close();
-        }
-
-        if (hcc == null) {
-            BufferedReader ipReader = new BufferedReader(new InputStreamReader(new FileInputStream(masterFilePath)));
-            String masterNode = ipReader.readLine();
-            ipReader.close();
-
-            InetAddress[] ips = InetAddress.getAllByName(masterNode);
-            int port = Integer.parseInt(clusterProps.getProperty("CC_CLIENTPORT"));
-            for (InetAddress ip : ips) {
-                if (ip.getAddress().length <= 4) {
-                    try {
-                        hcc = new HyracksConnection(ip.getHostAddress(), port);
-                        break;
-                    } catch (Exception e) {
-                        continue;
-                    }
-                }
-            }
-        }
-
-        long start = System.currentTimeMillis();
-        JobId jobId = hcc.startJob(job);
-        hcc.waitForCompletion(jobId);
-
-        // System.out.println("job finished: " + jobId.toString());
-        // call all leave nodes to end
-        for (Operator leaf : leaveOps) {
-            jobClose(leaf);
-        }
-
-        long end = System.currentTimeMillis();
-        System.err.println(start + " " + end + " " + (end - start));
-    }
-
-    /**
-     * mv to final directory on hdfs (not real final)
-     * 
-     * @param leaf
-     * @throws Exception
-     */
-    private void jobClose(Operator leaf) throws Exception {
-        FileSinkOperator fsOp = (FileSinkOperator) leaf;
-        FileSinkDesc desc = fsOp.getConf();
-        boolean isNativeTable = !desc.getTableInfo().isNonNative();
-        if ((conf != null) && isNativeTable) {
-            String specPath = desc.getDirName();
-            DynamicPartitionCtx dpCtx = desc.getDynPartCtx();
-            // for 0.7.0
-            fsOp.mvFileToFinalPath(specPath, conf, true, LOG, dpCtx);
-            // for 0.8.0
-            // Utilities.mvFileToFinalPath(specPath, conf, true, LOG, dpCtx,
-            // desc);
-        }
-    }
-}
+package edu.uci.ics.hivesterix.runtime.exec;
+
+import java.io.BufferedReader;
+import java.io.FileInputStream;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+import java.io.Serializable;
+import java.net.InetAddress;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Properties;
+import java.util.Set;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.hive.conf.HiveConf;
+import org.apache.hadoop.hive.ql.exec.ConditionalTask;
+import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
+import org.apache.hadoop.hive.ql.exec.MapRedTask;
+import org.apache.hadoop.hive.ql.exec.MoveTask;
+import org.apache.hadoop.hive.ql.exec.Operator;
+import org.apache.hadoop.hive.ql.exec.TableScanOperator;
+import org.apache.hadoop.hive.ql.exec.Task;
+import org.apache.hadoop.hive.ql.exec.Utilities;
+import org.apache.hadoop.hive.ql.plan.DynamicPartitionCtx;
+import org.apache.hadoop.hive.ql.plan.FetchWork;
+import org.apache.hadoop.hive.ql.plan.FileSinkDesc;
+import org.apache.hadoop.hive.ql.plan.MapredLocalWork;
+import org.apache.hadoop.hive.ql.plan.MapredWork;
+import org.apache.hadoop.hive.ql.plan.OperatorDesc;
+import org.apache.hadoop.hive.ql.plan.PartitionDesc;
+import org.apache.hadoop.hive.ql.plan.TableScanDesc;
+import org.apache.hadoop.mapred.Reporter;
+
+import edu.uci.ics.hivesterix.common.config.ConfUtil;
+import edu.uci.ics.hivesterix.logical.expression.HiveExpressionTypeComputer;
+import edu.uci.ics.hivesterix.logical.expression.HiveMergeAggregationExpressionFactory;
+import edu.uci.ics.hivesterix.logical.expression.HiveNullableTypeComputer;
+import edu.uci.ics.hivesterix.logical.expression.HivePartialAggregationTypeComputer;
+import edu.uci.ics.hivesterix.logical.plan.HiveAlgebricksTranslator;
+import edu.uci.ics.hivesterix.logical.plan.HiveLogicalPlanAndMetaData;
+import edu.uci.ics.hivesterix.optimizer.rulecollections.HiveRuleCollections;
+import edu.uci.ics.hivesterix.runtime.factory.evaluator.HiveExpressionRuntimeProvider;
+import edu.uci.ics.hivesterix.runtime.factory.nullwriter.HiveNullWriterFactory;
+import edu.uci.ics.hivesterix.runtime.inspector.HiveBinaryBooleanInspectorFactory;
+import edu.uci.ics.hivesterix.runtime.inspector.HiveBinaryIntegerInspectorFactory;
+import edu.uci.ics.hivesterix.runtime.jobgen.HiveConnectorPolicyAssignmentPolicy;
+import edu.uci.ics.hivesterix.runtime.jobgen.HiveConnectorPolicyAssignmentPolicy.Policy;
+import edu.uci.ics.hivesterix.runtime.provider.HiveBinaryComparatorFactoryProvider;
+import edu.uci.ics.hivesterix.runtime.provider.HiveBinaryHashFunctionFactoryProvider;
+import edu.uci.ics.hivesterix.runtime.provider.HiveBinaryHashFunctionFamilyProvider;
+import edu.uci.ics.hivesterix.runtime.provider.HiveNormalizedKeyComputerFactoryProvider;
+import edu.uci.ics.hivesterix.runtime.provider.HivePrinterFactoryProvider;
+import edu.uci.ics.hivesterix.runtime.provider.HiveSerializerDeserializerProvider;
+import edu.uci.ics.hivesterix.runtime.provider.HiveTypeTraitProvider;
+import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksAbsolutePartitionConstraint;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.common.utils.Pair;
+import edu.uci.ics.hyracks.algebricks.compiler.api.HeuristicCompilerFactoryBuilder;
+import edu.uci.ics.hyracks.algebricks.compiler.api.HeuristicCompilerFactoryBuilder.DefaultOptimizationContextFactory;
+import edu.uci.ics.hyracks.algebricks.compiler.api.ICompiler;
+import edu.uci.ics.hyracks.algebricks.compiler.api.ICompilerFactory;
+import edu.uci.ics.hyracks.algebricks.compiler.rewriter.rulecontrollers.SequentialFixpointRuleController;
+import edu.uci.ics.hyracks.algebricks.compiler.rewriter.rulecontrollers.SequentialOnceRuleController;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalPlan;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalPlanAndMetadata;
+import edu.uci.ics.hyracks.algebricks.core.algebra.prettyprint.LogicalOperatorPrettyPrintVisitor;
+import edu.uci.ics.hyracks.algebricks.core.algebra.prettyprint.PlanPrettyPrinter;
+import edu.uci.ics.hyracks.algebricks.core.rewriter.base.AbstractRuleController;
+import edu.uci.ics.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule;
+import edu.uci.ics.hyracks.algebricks.core.rewriter.base.PhysicalOptimizationConfig;
+import edu.uci.ics.hyracks.api.client.HyracksConnection;
+import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
+import edu.uci.ics.hyracks.api.job.JobId;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+
+@SuppressWarnings({ "rawtypes", "unchecked" })
+public class HyracksExecutionEngine implements IExecutionEngine {
+
+    private static final Log LOG = LogFactory.getLog(HyracksExecutionEngine.class.getName());
+    private static final String clusterPropertiesPath = "conf/cluster.properties";
+    private static final String masterFilePath = "conf/master";
+
+    private static List<Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>> DEFAULT_LOGICAL_REWRITES = new ArrayList<Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>>();
+    private static List<Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>> DEFAULT_PHYSICAL_REWRITES = new ArrayList<Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>>();
+    static {
+        SequentialFixpointRuleController seqCtrlNoDfs = new SequentialFixpointRuleController(false);
+        SequentialFixpointRuleController seqCtrlFullDfs = new SequentialFixpointRuleController(true);
+        SequentialOnceRuleController seqOnceCtrl = new SequentialOnceRuleController(true);
+        DEFAULT_LOGICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqCtrlFullDfs,
+                HiveRuleCollections.NORMALIZATION));
+        DEFAULT_LOGICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqCtrlNoDfs,
+                HiveRuleCollections.COND_PUSHDOWN_AND_JOIN_INFERENCE));
+        DEFAULT_LOGICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqCtrlFullDfs,
+                HiveRuleCollections.LOAD_FIELDS));
+        DEFAULT_LOGICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqCtrlNoDfs,
+                HiveRuleCollections.OP_PUSHDOWN));
+        DEFAULT_LOGICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqOnceCtrl,
+                HiveRuleCollections.DATA_EXCHANGE));
+        DEFAULT_LOGICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqCtrlNoDfs,
+                HiveRuleCollections.CONSOLIDATION));
+
+        DEFAULT_PHYSICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqOnceCtrl,
+                HiveRuleCollections.PHYSICAL_PLAN_REWRITES));
+        DEFAULT_PHYSICAL_REWRITES.add(new Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>(seqOnceCtrl,
+                HiveRuleCollections.prepareJobGenRules));
+    }
+
+    /**
+     * static configurations for compiler
+     */
+    private HeuristicCompilerFactoryBuilder builder;
+
+    /**
+     * compiler
+     */
+    private ICompiler compiler;
+
+    /**
+     * physical optimization config
+     */
+    private PhysicalOptimizationConfig physicalOptimizationConfig;
+
+    /**
+     * final ending operators
+     */
+    private List<Operator> leaveOps = new ArrayList<Operator>();
+
+    /**
+     * tasks that are already visited
+     */
+    private Map<Task<? extends Serializable>, Boolean> tasksVisited = new HashMap<Task<? extends Serializable>, Boolean>();
+
+    /**
+     * hyracks job spec
+     */
+    private JobSpecification jobSpec;
+
+    /**
+     * hive configuration
+     */
+    private HiveConf conf;
+
+    /**
+     * plan printer
+     */
+    private PrintWriter planPrinter;
+
+    /**
+     * properties
+     */
+    private Properties clusterProps;
+
+    /**
+     * the Hyracks client connection
+     */
+    private IHyracksClientConnection hcc;
+
+    public HyracksExecutionEngine(HiveConf conf) {
+        this.conf = conf;
+        init(conf);
+    }
+
+    public HyracksExecutionEngine(HiveConf conf, PrintWriter planPrinter) {
+        this.conf = conf;
+        this.planPrinter = planPrinter;
+        init(conf);
+    }
+
+    private void init(HiveConf conf) {
+        builder = new HeuristicCompilerFactoryBuilder(DefaultOptimizationContextFactory.INSTANCE);
+        builder.setLogicalRewrites(DEFAULT_LOGICAL_REWRITES);
+        builder.setPhysicalRewrites(DEFAULT_PHYSICAL_REWRITES);
+        builder.setIMergeAggregationExpressionFactory(HiveMergeAggregationExpressionFactory.INSTANCE);
+        builder.setExpressionTypeComputer(HiveExpressionTypeComputer.INSTANCE);
+        builder.setNullableTypeComputer(HiveNullableTypeComputer.INSTANCE);
+
+        long memSizeExternalGby = conf.getLong("hive.algebricks.groupby.external.memory", 268435456);
+        long memSizeExternalSort = conf.getLong("hive.algebricks.sort.memory", 536870912);
+        int frameSize = conf.getInt("hive.algebricks.framesize", 32768);
+
+        physicalOptimizationConfig = new PhysicalOptimizationConfig();
+        int frameLimitExtGby = (int) (memSizeExternalGby / frameSize);
+        physicalOptimizationConfig.setMaxFramesExternalGroupBy(frameLimitExtGby);
+        int frameLimitExtSort = (int) (memSizeExternalSort / frameSize);
+        physicalOptimizationConfig.setMaxFramesExternalSort(frameLimitExtSort);
+        builder.setPhysicalOptimizationConfig(physicalOptimizationConfig);
+    }
+
+    @Override
+    public int compileJob(List<Task<? extends Serializable>> rootTasks) {
+        // clean up
+        leaveOps.clear();
+        tasksVisited.clear();
+        jobSpec = null;
+
+        HashMap<String, PartitionDesc> aliasToPath = new HashMap<String, PartitionDesc>();
+        List<Operator> rootOps = generateRootOperatorDAG(rootTasks, aliasToPath);
+
+        // get all leave Ops
+        getLeaves(rootOps, leaveOps);
+        HiveAlgebricksTranslator translator = new HiveAlgebricksTranslator();
+        try {
+            translator.translate(rootOps, null, aliasToPath);
+
+            ILogicalPlan plan = translator.genLogicalPlan();
+
+            if (plan.getRoots() != null && plan.getRoots().size() > 0 && plan.getRoots().get(0).getValue() != null) {
+                //translator.printOperators();
+                ILogicalPlanAndMetadata planAndMetadata = new HiveLogicalPlanAndMetaData(plan,
+                        translator.getMetadataProvider());
+
+                ICompilerFactory compilerFactory = builder.create();
+                compiler = compilerFactory.createCompiler(planAndMetadata.getPlan(),
+                        planAndMetadata.getMetadataProvider(), translator.getVariableCounter());
+
+                // run optimization and re-writing rules for Hive plan
+                compiler.optimize();
+
+                // print optimized plan
+                LogicalOperatorPrettyPrintVisitor pvisitor = new LogicalOperatorPrettyPrintVisitor();
+                StringBuilder buffer = new StringBuilder();
+                PlanPrettyPrinter.printPlan(plan, buffer, pvisitor, 0);
+                String planStr = buffer.toString();
+                LOG.info(planStr);
+
+                if (planPrinter != null)
+                    planPrinter.print(planStr);
+            } else {
+                /** it is not a map reduce task DAG */
+                return 2;
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+            return 1;
+        }
+
+        return 0;
+    }
+
+    private void codeGen() throws AlgebricksException {
+        try {
+            // number of cpu cores in the cluster
+            builder.setClusterLocations(new AlgebricksAbsolutePartitionConstraint(ConfUtil.getNCs()));
+        } catch (Exception e) {
+            throw new AlgebricksException(e);
+        }
+        // builder.setClusterTopology(ConfUtil.getClusterTopology());
+        builder.setBinaryBooleanInspectorFactory(HiveBinaryBooleanInspectorFactory.INSTANCE);
+        builder.setBinaryIntegerInspectorFactory(HiveBinaryIntegerInspectorFactory.INSTANCE);
+        builder.setComparatorFactoryProvider(HiveBinaryComparatorFactoryProvider.INSTANCE);
+        builder.setExpressionRuntimeProvider(HiveExpressionRuntimeProvider.INSTANCE);
+        builder.setHashFunctionFactoryProvider(HiveBinaryHashFunctionFactoryProvider.INSTANCE);
+        builder.setPrinterProvider(HivePrinterFactoryProvider.INSTANCE);
+        builder.setSerializerDeserializerProvider(HiveSerializerDeserializerProvider.INSTANCE);
+        builder.setNullWriterFactory(HiveNullWriterFactory.INSTANCE);
+        builder.setNormalizedKeyComputerFactoryProvider(HiveNormalizedKeyComputerFactoryProvider.INSTANCE);
+        builder.setPartialAggregationTypeComputer(HivePartialAggregationTypeComputer.INSTANCE);
+        builder.setTypeTraitProvider(HiveTypeTraitProvider.INSTANCE);
+        builder.setHashFunctionFamilyProvider(HiveBinaryHashFunctionFamilyProvider.INSTANCE);
+
+        jobSpec = compiler.createJob(null, null);
+
+        // set the policy
+        String policyStr = conf.get("hive.hyracks.connectorpolicy");
+        if (policyStr == null)
+            policyStr = "PIPELINING";
+        Policy policyValue = Policy.valueOf(policyStr);
+        jobSpec.setConnectorPolicyAssignmentPolicy(new HiveConnectorPolicyAssignmentPolicy(policyValue));
+        jobSpec.setUseConnectorPolicyForScheduling(false);
+    }
+
+    @Override
+    public int executeJob() {
+        try {
+            codeGen();
+            executeHyracksJob(jobSpec);
+        } catch (Exception e) {
+            e.printStackTrace();
+            return 1;
+        }
+        return 0;
+    }
+
+    private List<Operator> generateRootOperatorDAG(List<Task<? extends Serializable>> rootTasks,
+            HashMap<String, PartitionDesc> aliasToPath) {
+
+        List<Operator> rootOps = new ArrayList<Operator>();
+        List<Task<? extends Serializable>> toDelete = new ArrayList<Task<? extends Serializable>>();
+        tasksVisited.clear();
+
+        for (int i = rootTasks.size() - 1; i >= 0; i--) {
+            /**
+             * list of map-reduce tasks
+             */
+            Task<? extends Serializable> task = rootTasks.get(i);
+
+            if (task instanceof MapRedTask) {
+                List<Operator> mapRootOps = articulateMapReduceOperators(task, rootOps, aliasToPath, rootTasks);
+                if (i == 0)
+                    rootOps.addAll(mapRootOps);
+                else {
+                    List<Operator> leaves = new ArrayList<Operator>();
+                    getLeaves(rootOps, leaves);
+
+                    List<Operator> mapChildren = new ArrayList<Operator>();
+                    for (Operator childMap : mapRootOps) {
+                        if (childMap instanceof TableScanOperator) {
+                            TableScanDesc topDesc = (TableScanDesc) childMap.getConf();
+                            if (topDesc == null)
+                                mapChildren.add(childMap);
+                            else {
+                                rootOps.add(childMap);
+                            }
+                        } else
+                            mapChildren.add(childMap);
+                    }
+
+                    if (mapChildren.size() > 0) {
+                        for (Operator leaf : leaves)
+                            leaf.setChildOperators(mapChildren);
+                        for (Operator child : mapChildren)
+                            child.setParentOperators(leaves);
+                    }
+                }
+
+                MapredWork mr = (MapredWork) task.getWork();
+                HashMap<String, PartitionDesc> map = mr.getAliasToPartnInfo();
+
+                addAliasToPartition(aliasToPath, map);
+                toDelete.add(task);
+            }
+        }
+
+        for (Task<? extends Serializable> task : toDelete)
+            rootTasks.remove(task);
+
+        return rootOps;
+    }
+
+    private void addAliasToPartition(HashMap<String, PartitionDesc> aliasToPath, HashMap<String, PartitionDesc> map) {
+        Iterator<String> keys = map.keySet().iterator();
+        while (keys.hasNext()) {
+            String key = keys.next();
+            PartitionDesc part = map.get(key);
+            String[] names = key.split(":");
+            for (String name : names) {
+                aliasToPath.put(name, part);
+            }
+        }
+    }
+
+    private List<Operator> articulateMapReduceOperators(Task task, List<Operator> rootOps,
+            HashMap<String, PartitionDesc> aliasToPath, List<Task<? extends Serializable>> rootTasks) {
+        // System.out.println("!"+task.getName());
+        if (!(task instanceof MapRedTask)) {
+            if (!(task instanceof ConditionalTask)) {
+                rootTasks.add(task);
+                return null;
+            } else {
+                // remove map-reduce branches in condition task
+                ConditionalTask condition = (ConditionalTask) task;
+                List<Task<? extends Serializable>> branches = condition.getListTasks();
+                for (Task branch : branches) {
+                    if (branch instanceof MoveTask) {
+                        //return articulateMapReduceOperators(branch, rootOps, aliasToPath, rootTasks);
+                        return null;
+                    }
+                }
+                for (int i = branches.size() - 1; i >= 0; i--) {
+                    Task branch = branches.get(i);
+                    if (branch instanceof MapRedTask) {
+                        return articulateMapReduceOperators(branch, rootOps, aliasToPath, rootTasks);
+                    }
+                }
+                rootTasks.add(task);
+                return null;
+            }
+        }
+
+        MapredWork mr = (MapredWork) task.getWork();
+        HashMap<String, PartitionDesc> map = mr.getAliasToPartnInfo();
+
+        // put all aliasToParitionDesc mapping into the map
+        addAliasToPartition(aliasToPath, map);
+
+        MapRedTask mrtask = (MapRedTask) task;
+        MapredWork work = (MapredWork) mrtask.getWork();
+        HashMap<String, Operator<? extends OperatorDesc>> operators = work.getAliasToWork();
+
+        Set entries = operators.entrySet();
+        Iterator<Entry<String, Operator>> iterator = entries.iterator();
+        List<Operator> mapRootOps = new ArrayList<Operator>();
+
+        // get map root operators
+        while (iterator.hasNext()) {
+            Operator next = iterator.next().getValue();
+            if (!mapRootOps.contains(next)) {
+                // clear that only for the case of union
+                mapRootOps.add(next);
+            }
+        }
+
+        // get map local work
+        MapredLocalWork localWork = work.getMapLocalWork();
+        if (localWork != null) {
+            HashMap<String, Operator<? extends OperatorDesc>> localOperators = localWork.getAliasToWork();
+
+            Set localEntries = localOperators.entrySet();
+            Iterator<Entry<String, Operator>> localIterator = localEntries.iterator();
+            while (localIterator.hasNext()) {
+                mapRootOps.add(localIterator.next().getValue());
+            }
+
+            HashMap<String, FetchWork> localFetch = localWork.getAliasToFetchWork();
+            Set localFetchEntries = localFetch.entrySet();
+            Iterator<Entry<String, FetchWork>> localFetchIterator = localFetchEntries.iterator();
+            while (localFetchIterator.hasNext()) {
+                Entry<String, FetchWork> fetchMap = localFetchIterator.next();
+                FetchWork fetch = fetchMap.getValue();
+                String alias = fetchMap.getKey();
+                List<PartitionDesc> dirPart = fetch.getPartDesc();
+
+                // temporary hack: put the first partitionDesc into the map
+                aliasToPath.put(alias, dirPart.get(0));
+            }
+        }
+
+        Boolean visited = tasksVisited.get(task);
+        if (visited != null && visited.booleanValue() == true) {
+            return mapRootOps;
+        }
+
+        // do that only for union operator
+        for (Operator op : mapRootOps)
+            if (op.getParentOperators() != null)
+                op.getParentOperators().clear();
+
+        List<Operator> mapLeaves = new ArrayList<Operator>();
+        downToLeaves(mapRootOps, mapLeaves);
+        List<Operator> reduceOps = new ArrayList<Operator>();
+
+        if (work.getReducer() != null)
+            reduceOps.add(work.getReducer());
+
+        for (Operator mapLeaf : mapLeaves) {
+            mapLeaf.setChildOperators(reduceOps);
+        }
+
+        for (Operator reduceOp : reduceOps) {
+            if (reduceOp != null)
+                reduceOp.setParentOperators(mapLeaves);
+        }
+
+        List<Operator> leafs = new ArrayList<Operator>();
+        if (reduceOps.size() > 0) {
+            downToLeaves(reduceOps, leafs);
+        } else {
+            leafs = mapLeaves;
+        }
+
+        List<Operator> mapChildren = new ArrayList<Operator>();
+        if (task.getChildTasks() != null && task.getChildTasks().size() > 0) {
+            for (Object child : task.getChildTasks()) {
+                List<Operator> childMapOps = articulateMapReduceOperators((Task) child, rootOps, aliasToPath, rootTasks);
+                if (childMapOps == null)
+                    continue;
+
+                for (Operator childMap : childMapOps) {
+                    if (childMap instanceof TableScanOperator) {
+                        TableScanDesc topDesc = (TableScanDesc) childMap.getConf();
+                        if (topDesc == null || topDesc.getAlias() == null) {
+                            mapChildren.add(childMap);
+                        } else {
+                            rootOps.add(childMap);
+                        }
+                    } else {
+                        // if not table scan, add the child
+                        mapChildren.add(childMap);
+                    }
+                }
+            }
+
+            if (mapChildren.size() > 0) {
+                int i = 0;
+                for (Operator leaf : leafs) {
+                    if (leaf.getChildOperators() == null || leaf.getChildOperators().size() == 0)
+                        leaf.setChildOperators(new ArrayList<Operator>());
+                    leaf.getChildOperators().add(mapChildren.get(i));
+                    i++;
+                }
+                i = 0;
+                for (Operator child : mapChildren) {
+                    if (child.getParentOperators() == null || child.getParentOperators().size() == 0) {
+                        child.setParentOperators(new ArrayList<Operator>());
+                    }
+                    if (i < leafs.size()) {
+                        if (child.getParentOperators().size()==0) {
+                            child.getParentOperators().add(leafs.get(i));
+                        }
+                    }
+                    i++;
+                }
+            }
+        }
+
+        // mark this task as visited
+        this.tasksVisited.put(task, true);
+        return mapRootOps;
+    }
+
+    /**
+     * down to leaf nodes
+     * 
+     * @param ops
+     * @param leaves
+     */
+    private void downToLeaves(List<Operator> ops, List<Operator> leaves) {
+
+        // Operator currentOp;
+        for (Operator op : ops) {
+            if (op != null && op.getChildOperators() != null && op.getChildOperators().size() > 0) {
+                downToLeaves(op.getChildOperators(), leaves);
+            } else {
+                if (op != null && leaves.indexOf(op) < 0)
+                    leaves.add(op);
+            }
+        }
+    }
+
+    private void getLeaves(List<Operator> roots, List<Operator> currentLeaves) {
+        for (Operator op : roots) {
+            List<Operator> children = op.getChildOperators();
+            if (children == null || children.size() <= 0) {
+                currentLeaves.add(op);
+            } else {
+                getLeaves(children, currentLeaves);
+            }
+        }
+    }
+
+    private void executeHyracksJob(JobSpecification job) throws Exception {
+
+        /**
+         * load the properties file if it is not loaded
+         */
+        if (clusterProps == null) {
+            clusterProps = new Properties();
+            InputStream confIn = new FileInputStream(clusterPropertiesPath);
+            clusterProps.load(confIn);
+            confIn.close();
+        }
+
+        if (hcc == null) {
+            BufferedReader ipReader = new BufferedReader(new InputStreamReader(new FileInputStream(masterFilePath)));
+            String masterNode = ipReader.readLine();
+            ipReader.close();
+
+            InetAddress[] ips = InetAddress.getAllByName(masterNode);
+            int port = Integer.parseInt(clusterProps.getProperty("CC_CLIENTPORT"));
+            for (InetAddress ip : ips) {
+                if (ip.getAddress().length <= 4) {
+                    try {
+                        hcc = new HyracksConnection(ip.getHostAddress(), port);
+                        break;
+                    } catch (Exception e) {
+                        continue;
+                    }
+                }
+            }
+        }
+
+        long start = System.currentTimeMillis();
+        JobId jobId = hcc.startJob(job);
+        hcc.waitForCompletion(jobId);
+
+        // System.out.println("job finished: " + jobId.toString());
+        // call all leave nodes to end
+        for (Operator leaf : leaveOps) {
+            jobClose(leaf);
+        }
+
+        long end = System.currentTimeMillis();
+        System.err.println(start + " " + end + " " + (end - start));
+    }
+
+    /**
+     * mv to final directory on hdfs (not real final)
+     * 
+     * @param leaf
+     * @throws Exception
+     */
+    private void jobClose(Operator leaf) throws Exception {
+        FileSinkOperator fsOp = (FileSinkOperator) leaf;
+        FileSinkDesc desc = fsOp.getConf();
+        boolean isNativeTable = !desc.getTableInfo().isNonNative();
+        if ((conf != null) && isNativeTable) {
+            String specPath = desc.getDirName();
+            DynamicPartitionCtx dpCtx = desc.getDynPartCtx();
+            // for 0.7.0
+            //fsOp.mvFileToFinalPath(specPath, conf, true, LOG, dpCtx);
+            // for 0.8.0
+            //Utilities.mvFileToFinalPath(specPath, conf, true, LOG, dpCtx, desc);
+            Utilities.mvFileToFinalPath(specPath, conf, true, LOG, dpCtx, desc, Reporter.NULL);
+        }
+    }
+}
diff --git a/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/Driver.java b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/Driver.java
index 4c40f5d..64a3f12 100644
--- a/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/Driver.java
+++ b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/Driver.java
@@ -1,17 +1,3 @@
-/*
- * 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.
- */
 /**
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
@@ -42,11 +28,13 @@
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
+import java.util.LinkedHashMap;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Queue;
 import java.util.Set;
+import java.util.concurrent.ConcurrentLinkedQueue;
 
 import org.apache.commons.lang.StringUtils;
 import org.apache.commons.logging.Log;
@@ -62,6 +50,7 @@
 import org.apache.hadoop.hive.ql.exec.ExecDriver;
 import org.apache.hadoop.hive.ql.exec.FetchTask;
 import org.apache.hadoop.hive.ql.exec.MapRedTask;
+import org.apache.hadoop.hive.ql.exec.MoveTask;
 import org.apache.hadoop.hive.ql.exec.Operator;
 import org.apache.hadoop.hive.ql.exec.StatsTask;
 import org.apache.hadoop.hive.ql.exec.TableScanOperator;
@@ -86,23 +75,22 @@
 import org.apache.hadoop.hive.ql.lockmgr.HiveLockObject;
 import org.apache.hadoop.hive.ql.lockmgr.HiveLockObject.HiveLockObjectData;
 import org.apache.hadoop.hive.ql.lockmgr.LockException;
+import org.apache.hadoop.hive.ql.log.PerfLogger;
 import org.apache.hadoop.hive.ql.metadata.AuthorizationException;
 import org.apache.hadoop.hive.ql.metadata.DummyPartition;
 import org.apache.hadoop.hive.ql.metadata.Hive;
 import org.apache.hadoop.hive.ql.metadata.HiveException;
-import org.apache.hadoop.hive.ql.metadata.HiveUtils;
 import org.apache.hadoop.hive.ql.metadata.Partition;
 import org.apache.hadoop.hive.ql.metadata.Table;
 import org.apache.hadoop.hive.ql.optimizer.ppr.PartitionPruner;
 import org.apache.hadoop.hive.ql.parse.ASTNode;
 import org.apache.hadoop.hive.ql.parse.AbstractSemanticAnalyzerHook;
 import org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer;
-import org.apache.hadoop.hive.ql.parse.ErrorMsg;
 import org.apache.hadoop.hive.ql.parse.HiveSemanticAnalyzerHookContext;
 import org.apache.hadoop.hive.ql.parse.HiveSemanticAnalyzerHookContextImpl;
+import org.apache.hadoop.hive.ql.parse.ImportSemanticAnalyzer;
 import org.apache.hadoop.hive.ql.parse.ParseContext;
 import org.apache.hadoop.hive.ql.parse.ParseDriver;
-import org.apache.hadoop.hive.ql.parse.ParseException;
 import org.apache.hadoop.hive.ql.parse.ParseUtils;
 import org.apache.hadoop.hive.ql.parse.PrunedPartitionList;
 import org.apache.hadoop.hive.ql.parse.SemanticAnalyzer;
@@ -112,6 +100,7 @@
 import org.apache.hadoop.hive.ql.plan.ConditionalResolver;
 import org.apache.hadoop.hive.ql.plan.ConditionalResolverMergeFiles;
 import org.apache.hadoop.hive.ql.plan.HiveOperation;
+import org.apache.hadoop.hive.ql.plan.OperatorDesc;
 import org.apache.hadoop.hive.ql.plan.TableDesc;
 import org.apache.hadoop.hive.ql.processors.CommandProcessor;
 import org.apache.hadoop.hive.ql.processors.CommandProcessorResponse;
@@ -127,15 +116,18 @@
 import edu.uci.ics.hivesterix.runtime.exec.HyracksExecutionEngine;
 import edu.uci.ics.hivesterix.runtime.exec.IExecutionEngine;
 
-@SuppressWarnings({ "deprecation", "unused" })
+@SuppressWarnings({ "deprecation", "unchecked", "rawtypes" })
 public class Driver implements CommandProcessor {
 
+    // hivesterix
+    private IExecutionEngine engine;
+    private boolean hivesterix = false;
+    private Set<Task> executedConditionalTsks = new HashSet<Task>();
+
     static final private Log LOG = LogFactory.getLog(Driver.class.getName());
     static final private LogHelper console = new LogHelper(LOG);
 
-    // hive-sterix
-    private IExecutionEngine engine;
-    private boolean hivesterix = false;
+    private static final Object compileMonitor = new Object();
 
     private int maxRows = 100;
     ByteStream.Output bos = new ByteStream.Output();
@@ -152,23 +144,57 @@
 
     // A limit on the number of threads that can be launched
     private int maxthreads;
-    private final int sleeptime = 2000;
-
+    private static final int SLEEP_TIME = 2000;
     protected int tryCount = Integer.MAX_VALUE;
 
-    private int checkLockManager() {
+    /**
+     * for backwards compatibility with current tests
+     */
+    public Driver(HiveConf conf) {
+        this.conf = conf;
+
+    }
+
+    public Driver() {
+        if (SessionState.get() != null) {
+            conf = SessionState.get().getConf();
+        }
+
+        // hivesterix
+        engine = new HyracksExecutionEngine(conf);
+    }
+
+    // hivesterix: plan printer
+    public Driver(HiveConf conf, PrintWriter planPrinter) {
+        this.conf = conf;
+        engine = new HyracksExecutionEngine(conf, planPrinter);
+    }
+
+    public void clear() {
+        this.hivesterix = false;
+        this.executedConditionalTsks.clear();
+    }
+
+    private boolean checkLockManager() {
         boolean supportConcurrency = conf.getBoolVar(HiveConf.ConfVars.HIVE_SUPPORT_CONCURRENCY);
-        if (supportConcurrency && (hiveLockMgr == null)) {
+        if (!supportConcurrency) {
+            return false;
+        }
+        if ((hiveLockMgr == null)) {
             try {
                 setLockManager();
             } catch (SemanticException e) {
                 errorMessage = "FAILED: Error in semantic analysis: " + e.getMessage();
                 SQLState = ErrorMsg.findSQLState(e.getMessage());
                 console.printError(errorMessage, "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
-                return (12);
+                return false;
             }
         }
-        return (0);
+        // the reason that we set the lock manager for the cxt here is because each
+        // query has its own ctx object. The hiveLockMgr is shared accross the
+        // same instance of Driver, which can run multiple queries.
+        ctx.setHiveLockMgr(hiveLockMgr);
+        return hiveLockMgr != null;
     }
 
     private void setLockManager() throws SemanticException {
@@ -183,6 +209,16 @@
                 hiveLockMgr = (HiveLockManager) ReflectionUtils.newInstance(conf.getClassByName(lockMgr), conf);
                 hiveLockMgr.setContext(new HiveLockManagerCtx(conf));
             } catch (Exception e) {
+                // set hiveLockMgr to null just in case this invalid manager got set to
+                // next query's ctx.
+                if (hiveLockMgr != null) {
+                    try {
+                        hiveLockMgr.close();
+                    } catch (LockException e1) {
+                        //nothing can do here
+                    }
+                    hiveLockMgr = null;
+                }
                 throw new SemanticException(ErrorMsg.LOCKMGR_NOT_INITIALIZED.getMsg() + e.getMessage());
             }
         }
@@ -230,10 +266,8 @@
         } else if (sem.getFetchTask() != null) {
             FetchTask ft = sem.getFetchTask();
             TableDesc td = ft.getTblDesc();
-            // partitioned tables don't have tableDesc set on the FetchTask.
-            // Instead
-            // they have a list of PartitionDesc objects, each with a table
-            // desc.
+            // partitioned tables don't have tableDesc set on the FetchTask. Instead
+            // they have a list of PartitionDesc objects, each with a table desc.
             // Let's
             // try to fetch the desc for the first partition and use it's
             // deserializer.
@@ -320,59 +354,102 @@
     }
 
     /**
-     * for backwards compatibility with current tests
-     */
-    public Driver(HiveConf conf) {
-        this.conf = conf;
-
-        // hivesterix
-        engine = new HyracksExecutionEngine(conf);
-    }
-
-    public Driver() {
-        if (SessionState.get() != null) {
-            conf = SessionState.get().getConf();
-        }
-
-        // hivesterix
-        engine = new HyracksExecutionEngine(conf);
-    }
-
-    // hivesterix: plan printer
-    public Driver(HiveConf conf, PrintWriter planPrinter) {
-        this.conf = conf;
-        engine = new HyracksExecutionEngine(conf, planPrinter);
-    }
-
-    public void clear() {
-        this.hivesterix = false;
-    }
-
-    /**
-     * Compile a new query. Any currently-planned query associated with this
-     * Driver is discarded.
+     * Compile a new query. Any currently-planned query associated with this Driver is discarded.
      * 
      * @param command
      *            The SQL query to compile.
      */
     public int compile(String command) {
+        return compile(command, true);
+    }
+
+    /**
+     * Hold state variables specific to each query being executed, that may not
+     * be consistent in the overall SessionState
+     */
+    private static class QueryState {
+        private HiveOperation op;
+        private String cmd;
+        private boolean init = false;
+
+        /**
+         * Initialize the queryState with the query state variables
+         */
+        public void init(HiveOperation op, String cmd) {
+            this.op = op;
+            this.cmd = cmd;
+            this.init = true;
+        }
+
+        public boolean isInitialized() {
+            return this.init;
+        }
+
+        public HiveOperation getOp() {
+            return this.op;
+        }
+
+        public String getCmd() {
+            return this.cmd;
+        }
+    }
+
+    public void saveSession(QueryState qs) {
+        SessionState oldss = SessionState.get();
+        if (oldss != null && oldss.getHiveOperation() != null) {
+            qs.init(oldss.getHiveOperation(), oldss.getCmd());
+        }
+    }
+
+    public void restoreSession(QueryState qs) {
+        SessionState ss = SessionState.get();
+        if (ss != null && qs != null && qs.isInitialized()) {
+            ss.setCmd(qs.getCmd());
+            ss.setCommandType(qs.getOp());
+        }
+    }
+
+    /**
+     * Compile a new query, but potentially reset taskID counter. Not resetting task counter
+     * is useful for generating re-entrant QL queries.
+     * 
+     * @param command
+     *            The HiveQL query to compile
+     * @param resetTaskIds
+     *            Resets taskID counter if true.
+     * @return 0 for ok
+     */
+    public int compile(String command, boolean resetTaskIds) {
+        PerfLogger perfLogger = PerfLogger.getPerfLogger();
+        perfLogger.PerfLogBegin(LOG, PerfLogger.COMPILE);
+
+        //holder for parent command type/string when executing reentrant queries
+        QueryState queryState = new QueryState();
+
         if (plan != null) {
             close();
             plan = null;
         }
 
-        TaskFactory.resetId();
+        if (resetTaskIds) {
+            TaskFactory.resetId();
+        }
+        saveSession(queryState);
 
         try {
             command = new VariableSubstitution().substitute(conf, command);
             ctx = new Context(conf);
+            ctx.setTryCount(getTryCount());
+            ctx.setCmd(command);
+            ctx.setHDFSCleanup(true);
 
             ParseDriver pd = new ParseDriver();
             ASTNode tree = pd.parse(command, ctx);
             tree = ParseUtils.findRootNonNullToken(tree);
 
             BaseSemanticAnalyzer sem = SemanticAnalyzerFactory.get(conf, tree);
-            List<AbstractSemanticAnalyzerHook> saHooks = getSemanticAnalyzerHooks();
+            List<AbstractSemanticAnalyzerHook> saHooks = getHooks(HiveConf.ConfVars.SEMANTIC_ANALYZER_HOOK,
+                    AbstractSemanticAnalyzerHook.class);
 
             // Do semantic analysis and plan generation
             if (saHooks != null) {
@@ -382,6 +459,7 @@
                     tree = hook.preAnalyze(hookCtx, tree);
                 }
                 sem.analyze(tree, ctx);
+                hookCtx.update(sem);
                 for (AbstractSemanticAnalyzerHook hook : saHooks) {
                     hook.postAnalyze(hookCtx, sem.getRootTasks());
                 }
@@ -394,19 +472,10 @@
             // validate the plan
             sem.validate();
 
-            plan = new QueryPlan(command, sem);
-            // initialize FetchTask right here
-            if (plan.getFetchTask() != null) {
-                plan.getFetchTask().initialize(conf, plan, null);
-            }
-
-            // get the output schema
-            schema = getSchema(sem, conf);
+            plan = new QueryPlan(command, sem, perfLogger.getStartTime(PerfLogger.DRIVER_RUN));
 
             // test Only - serialize the query plan and deserialize it
-            if (sem instanceof SemanticAnalyzer && command.toLowerCase().indexOf("create") < 0) {
-
-                Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
+            if ("true".equalsIgnoreCase(System.getProperty("test.serialize.qplan"))) {
 
                 String queryPlanFileName = ctx.getLocalScratchDir(true) + Path.SEPARATOR_CHAR + "queryplan.xml";
                 LOG.info("query plan = " + queryPlanFileName);
@@ -431,39 +500,45 @@
                 plan.getFetchTask().initialize(conf, plan, null);
             }
 
-            // do the authorization check
+            // get the output schema
+            schema = getSchema(sem, conf);
+
+            //do the authorization check
             if (HiveConf.getBoolVar(conf, HiveConf.ConfVars.HIVE_AUTHORIZATION_ENABLED)) {
                 try {
-                    // doAuthorization(sem);
+                    perfLogger.PerfLogBegin(LOG, PerfLogger.DO_AUTHORIZATION);
+                    doAuthorization(sem);
                 } catch (AuthorizationException authExp) {
                     console.printError("Authorization failed:" + authExp.getMessage()
                             + ". Use show grant to get more details.");
                     return 403;
+                } finally {
+                    perfLogger.PerfLogEnd(LOG, PerfLogger.DO_AUTHORIZATION);
                 }
             }
 
+            //restore state after we're done executing a specific query
             // hyracks run
             if (sem instanceof SemanticAnalyzer && command.toLowerCase().indexOf("create") < 0) {
-                hivesterix = true;
-                return engine.compileJob(sem.getRootTasks());
+                int engineRet = engine.compileJob(sem.getRootTasks());
+                if (engineRet == 0) {
+                    hivesterix = true;
+                }
             }
-
             return 0;
-        } catch (SemanticException e) {
-            errorMessage = "FAILED: Error in semantic analysis: " + e.getMessage();
-            SQLState = ErrorMsg.findSQLState(e.getMessage());
-            console.printError(errorMessage, "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
-            return (10);
-        } catch (ParseException e) {
-            errorMessage = "FAILED: Parse Error: " + e.getMessage();
-            SQLState = ErrorMsg.findSQLState(e.getMessage());
-            console.printError(errorMessage, "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
-            return (11);
         } catch (Exception e) {
-            errorMessage = "FAILED: Hive Internal Error: " + Utilities.getNameMessage(e);
-            SQLState = ErrorMsg.findSQLState(e.getMessage());
-            console.printError(errorMessage + "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
-            return (12);
+            ErrorMsg error = ErrorMsg.getErrorMsg(e.getMessage());
+            errorMessage = "FAILED: " + e.getClass().getSimpleName();
+            if (error != ErrorMsg.GENERIC_ERROR) {
+                errorMessage += " [Error " + error.getErrorCode() + "]:";
+            }
+            errorMessage += " " + e.getMessage();
+            SQLState = error.getSQLState();
+            console.printError(errorMessage, "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
+            return error.getErrorCode();
+        } finally {
+            perfLogger.PerfLogEnd(LOG, PerfLogger.COMPILE);
+            restoreSession(queryState);
         }
     }
 
@@ -478,13 +553,13 @@
                 ss.getAuthorizer().authorize(db.getDatabase(db.getCurrentDatabase()), null,
                         HiveOperation.CREATETABLE_AS_SELECT.getOutputRequiredPrivileges());
             } else {
-                // if (op.equals(HiveOperation.IMPORT)) {
-                // ImportSemanticAnalyzer isa = (ImportSemanticAnalyzer) sem;
-                // if (!isa.existsTable()) {
-                ss.getAuthorizer().authorize(db.getDatabase(db.getCurrentDatabase()), null,
-                        HiveOperation.CREATETABLE_AS_SELECT.getOutputRequiredPrivileges());
-                // }
-                // }
+                if (op.equals(HiveOperation.IMPORT)) {
+                    ImportSemanticAnalyzer isa = (ImportSemanticAnalyzer) sem;
+                    if (!isa.existsTable()) {
+                        ss.getAuthorizer().authorize(db.getDatabase(db.getCurrentDatabase()), null,
+                                HiveOperation.CREATETABLE_AS_SELECT.getOutputRequiredPrivileges());
+                    }
+                }
             }
             if (outputs != null && outputs.size() > 0) {
                 for (WriteEntity write : outputs) {
@@ -512,8 +587,8 @@
 
             Map<String, Boolean> tableUsePartLevelAuth = new HashMap<String, Boolean>();
             for (ReadEntity read : inputs) {
-                if (read.getPartition() != null) {
-                    Table tbl = read.getTable();
+                Table tbl = read.getTable();
+                if ((read.getPartition() != null) || (tbl.isPartitioned())) {
                     String tblName = tbl.getTableName();
                     if (tableUsePartLevelAuth.get(tblName) == null) {
                         boolean usePartLevelPriv = (tbl.getParameters().get("PARTITION_LEVEL_PRIVILEGE") != null && ("TRUE"
@@ -532,9 +607,9 @@
                 ParseContext parseCtx = querySem.getParseContext();
                 Map<TableScanOperator, Table> tsoTopMap = parseCtx.getTopToTable();
 
-                for (Map.Entry<String, Operator<? extends Serializable>> topOpMap : querySem.getParseContext()
+                for (Map.Entry<String, Operator<? extends OperatorDesc>> topOpMap : querySem.getParseContext()
                         .getTopOps().entrySet()) {
-                    Operator<? extends Serializable> topOp = topOpMap.getValue();
+                    Operator<? extends OperatorDesc> topOp = topOpMap.getValue();
                     if (topOp instanceof TableScanOperator && tsoTopMap.containsKey(topOp)) {
                         TableScanOperator tableScanOp = (TableScanOperator) topOp;
                         Table tbl = tsoTopMap.get(tableScanOp);
@@ -550,7 +625,10 @@
                                 cols.add(columns.get(i).getName());
                             }
                         }
-                        if (tbl.isPartitioned() && tableUsePartLevelAuth.get(tbl.getTableName())) {
+                        //map may not contain all sources, since input list may have been optimized out
+                        //or non-existent tho such sources may still be referenced by the TableScanOperator
+                        //if it's null then the partition probably doesn't exist so let's use table permission
+                        if (tbl.isPartitioned() && tableUsePartLevelAuth.get(tbl.getTableName()) == Boolean.TRUE) {
                             String alias_id = topOpMap.getKey();
                             PrunedPartitionList partsList = PartitionPruner.prune(parseCtx.getTopToTable().get(topOp),
                                     parseCtx.getOpToPartPruner().get(topOp), parseCtx.getConf(), alias_id,
@@ -581,30 +659,28 @@
             // cache the results for table authorization
             Set<String> tableAuthChecked = new HashSet<String>();
             for (ReadEntity read : inputs) {
-                Table tbl = null;
+                Table tbl = read.getTable();
                 if (read.getPartition() != null) {
-                    tbl = read.getPartition().getTable();
+                    Partition partition = read.getPartition();
+                    tbl = partition.getTable();
                     // use partition level authorization
-                    if (tableUsePartLevelAuth.get(tbl.getTableName())) {
-                        List<String> cols = part2Cols.get(read.getPartition());
+                    if (tableUsePartLevelAuth.get(tbl.getTableName()) == Boolean.TRUE) {
+                        List<String> cols = part2Cols.get(partition);
                         if (cols != null && cols.size() > 0) {
-                            ss.getAuthorizer().authorize(read.getPartition().getTable(), read.getPartition(), cols,
+                            ss.getAuthorizer().authorize(partition.getTable(), partition, cols,
                                     op.getInputRequiredPrivileges(), null);
                         } else {
-                            ss.getAuthorizer().authorize(read.getPartition(), op.getInputRequiredPrivileges(), null);
+                            ss.getAuthorizer().authorize(partition, op.getInputRequiredPrivileges(), null);
                         }
                         continue;
                     }
-                } else if (read.getTable() != null) {
-                    tbl = read.getTable();
                 }
 
-                // if we reach here, it means it needs to do a table
-                // authorization
-                // check, and the table authorization may already happened
-                // because of other
+                // if we reach here, it means it needs to do a table authorization
+                // check, and the table authorization may already happened because of other
                 // partitions
-                if (tbl != null && !tableAuthChecked.contains(tbl.getTableName())) {
+                if (tbl != null && !tableAuthChecked.contains(tbl.getTableName())
+                        && !(tableUsePartLevelAuth.get(tbl.getTableName()) == Boolean.TRUE)) {
                     List<String> cols = tab2Cols.get(tbl);
                     if (cols != null && cols.size() > 0) {
                         ss.getAuthorizer().authorize(tbl, null, cols, op.getInputRequiredPrivileges(), null);
@@ -631,16 +707,15 @@
      * @param p
      *            The partition to be locked
      * @param mode
-     *            The mode of the lock (SHARED/EXCLUSIVE) Get the list of
-     *            objects to be locked. If a partition needs to be locked (in
-     *            any mode), all its parents should also be locked in SHARED
-     *            mode.
+     *            The mode of the lock (SHARED/EXCLUSIVE) Get the list of objects to be locked. If a
+     *            partition needs to be locked (in any mode), all its parents should also be locked in
+     *            SHARED mode.
      **/
     private List<HiveLockObj> getLockObjects(Table t, Partition p, HiveLockMode mode) throws SemanticException {
         List<HiveLockObj> locks = new LinkedList<HiveLockObj>();
 
         HiveLockObjectData lockData = new HiveLockObjectData(plan.getQueryId(), String.valueOf(System
-                .currentTimeMillis()), "IMPLICIT");
+                .currentTimeMillis()), "IMPLICIT", plan.getQueryStr());
 
         if (t != null) {
             locks.add(new HiveLockObj(new HiveLockObject(t, lockData), mode));
@@ -664,16 +739,20 @@
                 name = p.getName().split("@")[2];
             }
 
-            String partName = name;
             String partialName = "";
             String[] partns = name.split("/");
             int len = p instanceof DummyPartition ? partns.length : partns.length - 1;
+            Map<String, String> partialSpec = new LinkedHashMap<String, String>();
             for (int idx = 0; idx < len; idx++) {
                 String partn = partns[idx];
                 partialName += partn;
+                String[] nameValue = partn.split("=");
+                assert (nameValue.length == 2);
+                partialSpec.put(nameValue[0], nameValue[1]);
                 try {
                     locks.add(new HiveLockObj(new HiveLockObject(new DummyPartition(p.getTable(), p.getTable()
-                            .getDbName() + "/" + p.getTable().getTableName() + "/" + partialName), lockData), mode));
+                            .getDbName() + "/" + p.getTable().getTableName() + "/" + partialName, partialSpec),
+                            lockData), mode));
                     partialName += "/";
                 } catch (HiveException e) {
                     throw new SemanticException(e.getMessage());
@@ -687,17 +766,16 @@
     }
 
     /**
-     * Acquire read and write locks needed by the statement. The list of objects
-     * to be locked are obtained from he inputs and outputs populated by the
-     * compiler. The lock acuisition scheme is pretty simple. If all the locks
-     * cannot be obtained, error out. Deadlock is avoided by making sure that
-     * the locks are lexicographically sorted.
+     * Acquire read and write locks needed by the statement. The list of objects to be locked are
+     * obtained from he inputs and outputs populated by the compiler. The lock acuisition scheme is
+     * pretty simple. If all the locks cannot be obtained, error out. Deadlock is avoided by making
+     * sure that the locks are lexicographically sorted.
      **/
     public int acquireReadWriteLocks() {
-        try {
-            int sleepTime = conf.getIntVar(HiveConf.ConfVars.HIVE_LOCK_SLEEP_BETWEEN_RETRIES) * 1000;
-            int numRetries = conf.getIntVar(HiveConf.ConfVars.HIVE_LOCK_NUMRETRIES);
+        PerfLogger perfLogger = PerfLogger.getPerfLogger();
+        perfLogger.PerfLogBegin(LOG, PerfLogger.ACQUIRE_READ_WRITE_LOCKS);
 
+        try {
             boolean supportConcurrency = conf.getBoolVar(HiveConf.ConfVars.HIVE_SUPPORT_CONCURRENCY);
             if (!supportConcurrency) {
                 return 0;
@@ -706,8 +784,7 @@
             List<HiveLockObj> lockObjects = new ArrayList<HiveLockObj>();
 
             // Sort all the inputs, outputs.
-            // If a lock needs to be acquired on any partition, a read lock
-            // needs to be acquired on all
+            // If a lock needs to be acquired on any partition, a read lock needs to be acquired on all
             // its parents also
             for (ReadEntity input : plan.getInputs()) {
                 if (input.getType() == ReadEntity.Type.TABLE) {
@@ -718,16 +795,21 @@
             }
 
             for (WriteEntity output : plan.getOutputs()) {
+                List<HiveLockObj> lockObj = null;
                 if (output.getTyp() == WriteEntity.Type.TABLE) {
-                    lockObjects.addAll(getLockObjects(output.getTable(), null,
-                            output.isComplete() ? HiveLockMode.EXCLUSIVE : HiveLockMode.SHARED));
+                    lockObj = getLockObjects(output.getTable(), null, output.isComplete() ? HiveLockMode.EXCLUSIVE
+                            : HiveLockMode.SHARED);
                 } else if (output.getTyp() == WriteEntity.Type.PARTITION) {
-                    lockObjects.addAll(getLockObjects(null, output.getPartition(), HiveLockMode.EXCLUSIVE));
+                    lockObj = getLockObjects(null, output.getPartition(), HiveLockMode.EXCLUSIVE);
                 }
-                // In case of dynamic queries, it is possible to have incomplete
-                // dummy partitions
+                // In case of dynamic queries, it is possible to have incomplete dummy partitions
                 else if (output.getTyp() == WriteEntity.Type.DUMMYPARTITION) {
-                    lockObjects.addAll(getLockObjects(null, output.getPartition(), HiveLockMode.SHARED));
+                    lockObj = getLockObjects(null, output.getPartition(), HiveLockMode.SHARED);
+                }
+
+                if (lockObj != null) {
+                    lockObjects.addAll(lockObj);
+                    ctx.getOutputLockObjects().put(output, lockObj);
                 }
             }
 
@@ -735,13 +817,8 @@
                 return 0;
             }
 
-            int ret = checkLockManager();
-            if (ret != 0) {
-                return ret;
-            }
-
             HiveLockObjectData lockData = new HiveLockObjectData(plan.getQueryId(), String.valueOf(System
-                    .currentTimeMillis()), "IMPLICIT");
+                    .currentTimeMillis()), "IMPLICIT", plan.getQueryStr());
 
             // Lock the database also
             try {
@@ -752,25 +829,7 @@
                 throw new SemanticException(e.getMessage());
             }
 
-            ctx.setHiveLockMgr(hiveLockMgr);
-            List<HiveLock> hiveLocks = null;
-
-            int tryNum = 1;
-            do {
-
-                // ctx.getHiveLockMgr();
-                // hiveLocks = ctx.getHiveLockMgr().lock(lockObjects, false);
-
-                if (hiveLocks != null) {
-                    break;
-                }
-
-                tryNum++;
-                try {
-                    Thread.sleep(sleepTime);
-                } catch (InterruptedException e) {
-                }
-            } while (tryNum < numRetries);
+            List<HiveLock> hiveLocks = ctx.getHiveLockMgr().lock(lockObjects, false);
 
             if (hiveLocks == null) {
                 throw new SemanticException(ErrorMsg.LOCK_CANNOT_BE_ACQUIRED.getMsg());
@@ -784,138 +843,207 @@
             SQLState = ErrorMsg.findSQLState(e.getMessage());
             console.printError(errorMessage, "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
             return (10);
-        } catch (Exception e) {
+        } catch (LockException e) {
             errorMessage = "FAILED: Error in acquiring locks: " + e.getMessage();
             SQLState = ErrorMsg.findSQLState(e.getMessage());
             console.printError(errorMessage, "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
             return (10);
-        }
-    }
-
-    /**
-     * Release all the locks acquired implicitly by the statement. Note that the
-     * locks acquired with 'keepAlive' set to True are not released.
-     **/
-    private void releaseLocks() {
-        if (ctx != null && ctx.getHiveLockMgr() != null) {
-            try {
-                ctx.getHiveLockMgr().close();
-                ctx.setHiveLocks(null);
-            } catch (LockException e) {
-            }
+        } finally {
+            perfLogger.PerfLogEnd(LOG, PerfLogger.ACQUIRE_READ_WRITE_LOCKS);
         }
     }
 
     /**
      * @param hiveLocks
-     *            list of hive locks to be released Release all the locks
-     *            specified. If some of the locks have already been released,
-     *            ignore them
+     *            list of hive locks to be released Release all the locks specified. If some of the
+     *            locks have already been released, ignore them
      **/
     private void releaseLocks(List<HiveLock> hiveLocks) {
+        PerfLogger perfLogger = PerfLogger.getPerfLogger();
+        perfLogger.PerfLogBegin(LOG, PerfLogger.RELEASE_LOCKS);
+
         if (hiveLocks != null) {
             ctx.getHiveLockMgr().releaseLocks(hiveLocks);
         }
         ctx.setHiveLocks(null);
+
+        perfLogger.PerfLogEnd(LOG, PerfLogger.RELEASE_LOCKS);
     }
 
-    public CommandProcessorResponse run(String command) {
+    public CommandProcessorResponse run(String command) throws CommandNeedRetryException {
         errorMessage = null;
         SQLState = null;
 
-        int ret = compile(command);
+        if (!validateConfVariables()) {
+            return new CommandProcessorResponse(12, errorMessage, SQLState);
+        }
+
+        HiveDriverRunHookContext hookContext = new HiveDriverRunHookContextImpl(conf, command);
+        // Get all the driver run hooks and pre-execute them.
+        List<HiveDriverRunHook> driverRunHooks;
+        try {
+            driverRunHooks = getHooks(HiveConf.ConfVars.HIVE_DRIVER_RUN_HOOKS, HiveDriverRunHook.class);
+            for (HiveDriverRunHook driverRunHook : driverRunHooks) {
+                driverRunHook.preDriverRun(hookContext);
+            }
+        } catch (Exception e) {
+            errorMessage = "FAILED: Hive Internal Error: " + Utilities.getNameMessage(e);
+            SQLState = ErrorMsg.findSQLState(e.getMessage());
+            console.printError(errorMessage + "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
+            return new CommandProcessorResponse(12, errorMessage, SQLState);
+        }
+
+        // Reset the perf logger
+        PerfLogger perfLogger = PerfLogger.getPerfLogger(true);
+        perfLogger.PerfLogBegin(LOG, PerfLogger.DRIVER_RUN);
+        perfLogger.PerfLogBegin(LOG, PerfLogger.TIME_TO_SUBMIT);
+
+        int ret;
+        synchronized (compileMonitor) {
+            ret = compile(command);
+        }
         if (ret != 0) {
-            // releaseLocks(ctx.getHiveLocks());
+            releaseLocks(ctx.getHiveLocks());
             return new CommandProcessorResponse(ret, errorMessage, SQLState);
         }
 
-        // ret = acquireReadWriteLocks();
-        if (ret != 0) {
-            // releaseLocks(ctx.getHiveLocks());
-            return new CommandProcessorResponse(ret, errorMessage, SQLState);
+        boolean requireLock = false;
+        boolean ckLock = checkLockManager();
+
+        if (ckLock) {
+            boolean lockOnlyMapred = HiveConf.getBoolVar(conf, HiveConf.ConfVars.HIVE_LOCK_MAPRED_ONLY);
+            if (lockOnlyMapred) {
+                Queue<Task<? extends Serializable>> taskQueue = new LinkedList<Task<? extends Serializable>>();
+                taskQueue.addAll(plan.getRootTasks());
+                while (taskQueue.peek() != null) {
+                    Task<? extends Serializable> tsk = taskQueue.remove();
+                    requireLock = requireLock || tsk.requireLock();
+                    if (requireLock) {
+                        break;
+                    }
+                    if (tsk instanceof ConditionalTask) {
+                        taskQueue.addAll(((ConditionalTask) tsk).getListTasks());
+                    }
+                    if (tsk.getChildTasks() != null) {
+                        taskQueue.addAll(tsk.getChildTasks());
+                    }
+                    // does not add back up task here, because back up task should be the same
+                    // type of the original task.
+                }
+            } else {
+                requireLock = true;
+            }
+        }
+
+        if (requireLock) {
+            ret = acquireReadWriteLocks();
+            if (ret != 0) {
+                releaseLocks(ctx.getHiveLocks());
+                return new CommandProcessorResponse(ret, errorMessage, SQLState);
+            }
         }
 
         ret = execute();
         if (ret != 0) {
-            // releaseLocks(ctx.getHiveLocks());
+            //if needRequireLock is false, the release here will do nothing because there is no lock
+            releaseLocks(ctx.getHiveLocks());
             return new CommandProcessorResponse(ret, errorMessage, SQLState);
         }
 
-        // releaseLocks(ctx.getHiveLocks());
+        //if needRequireLock is false, the release here will do nothing because there is no lock
+        releaseLocks(ctx.getHiveLocks());
+
+        perfLogger.PerfLogEnd(LOG, PerfLogger.DRIVER_RUN);
+        perfLogger.close(LOG, plan);
+
+        // Take all the driver run hooks and post-execute them.
+        try {
+            for (HiveDriverRunHook driverRunHook : driverRunHooks) {
+                driverRunHook.postDriverRun(hookContext);
+            }
+        } catch (Exception e) {
+            errorMessage = "FAILED: Hive Internal Error: " + Utilities.getNameMessage(e);
+            SQLState = ErrorMsg.findSQLState(e.getMessage());
+            console.printError(errorMessage + "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
+            return new CommandProcessorResponse(12, errorMessage, SQLState);
+        }
+
         return new CommandProcessorResponse(ret);
     }
 
-    private List<AbstractSemanticAnalyzerHook> getSemanticAnalyzerHooks() throws Exception {
-        ArrayList<AbstractSemanticAnalyzerHook> saHooks = new ArrayList<AbstractSemanticAnalyzerHook>();
-        String pestr = conf.getVar(HiveConf.ConfVars.SEMANTIC_ANALYZER_HOOK);
-        if (pestr == null) {
-            return saHooks;
+    /**
+     * Validate configuration variables.
+     * 
+     * @return
+     */
+    private boolean validateConfVariables() {
+        boolean valid = true;
+        if ((!conf.getBoolVar(HiveConf.ConfVars.HIVE_HADOOP_SUPPORTS_SUBDIRECTORIES))
+                && ((conf.getBoolVar(HiveConf.ConfVars.HADOOPMAPREDINPUTDIRRECURSIVE))
+                        || (conf.getBoolVar(HiveConf.ConfVars.HIVEOPTLISTBUCKETING)) || ((conf
+                            .getBoolVar(HiveConf.ConfVars.HIVE_OPTIMIZE_UNION_REMOVE))))) {
+            errorMessage = "FAILED: Hive Internal Error: " + ErrorMsg.SUPPORT_DIR_MUST_TRUE_FOR_LIST_BUCKETING.getMsg();
+            SQLState = ErrorMsg.findSQLState(errorMessage);
+            console.printError(errorMessage + "\n");
+            valid = false;
         }
-        pestr = pestr.trim();
-        if (pestr.equals("")) {
-            return saHooks;
-        }
-
-        String[] peClasses = pestr.split(",");
-
-        for (String peClass : peClasses) {
-            try {
-                AbstractSemanticAnalyzerHook hook = HiveUtils.getSemanticAnalyzerHook(conf, peClass);
-                saHooks.add(hook);
-            } catch (HiveException e) {
-                console.printError("Pre Exec Hook Class not found:" + e.getMessage());
-                throw e;
-            }
-        }
-
-        return saHooks;
+        return valid;
     }
 
-    private List<Hook> getPreExecHooks() throws Exception {
-        ArrayList<Hook> pehooks = new ArrayList<Hook>();
-        String pestr = conf.getVar(HiveConf.ConfVars.PREEXECHOOKS);
-        pestr = pestr.trim();
-        if (pestr.equals("")) {
-            return pehooks;
+    /**
+     * Returns a set of hooks specified in a configuration variable.
+     * See getHooks(HiveConf.ConfVars hookConfVar, Class<T> clazz)
+     * 
+     * @param hookConfVar
+     * @return
+     * @throws Exception
+     */
+    private List<Hook> getHooks(HiveConf.ConfVars hookConfVar) throws Exception {
+        return getHooks(hookConfVar, Hook.class);
+    }
+
+    /**
+     * Returns the hooks specified in a configuration variable. The hooks are returned in a list in
+     * the order they were specified in the configuration variable.
+     * 
+     * @param hookConfVar
+     *            The configuration variable specifying a comma separated list of the hook
+     *            class names.
+     * @param clazz
+     *            The super type of the hooks.
+     * @return A list of the hooks cast as the type specified in clazz, in the order
+     *         they are listed in the value of hookConfVar
+     * @throws Exception
+     */
+    private <T extends Hook> List<T> getHooks(HiveConf.ConfVars hookConfVar, Class<T> clazz) throws Exception {
+
+        List<T> hooks = new ArrayList<T>();
+        String csHooks = conf.getVar(hookConfVar);
+        if (csHooks == null) {
+            return hooks;
         }
 
-        String[] peClasses = pestr.split(",");
+        csHooks = csHooks.trim();
+        if (csHooks.equals("")) {
+            return hooks;
+        }
 
-        for (String peClass : peClasses) {
+        String[] hookClasses = csHooks.split(",");
+
+        for (String hookClass : hookClasses) {
             try {
-                pehooks.add((Hook) Class.forName(peClass.trim(), true, JavaUtils.getClassLoader()).newInstance());
+                T hook = (T) Class.forName(hookClass.trim(), true, JavaUtils.getClassLoader()).newInstance();
+                hooks.add(hook);
             } catch (ClassNotFoundException e) {
-                console.printError("Pre Exec Hook Class not found:" + e.getMessage());
+                console.printError(hookConfVar.varname + " Class not found:" + e.getMessage());
                 throw e;
             }
         }
 
-        return pehooks;
+        return hooks;
     }
 
-    private List<Hook> getPostExecHooks() throws Exception {
-        ArrayList<Hook> pehooks = new ArrayList<Hook>();
-        String pestr = conf.getVar(HiveConf.ConfVars.POSTEXECHOOKS);
-        pestr = pestr.trim();
-        if (pestr.equals("")) {
-            return pehooks;
-        }
-
-        String[] peClasses = pestr.split(",");
-
-        for (String peClass : peClasses) {
-            try {
-                pehooks.add((Hook) Class.forName(peClass.trim(), true, JavaUtils.getClassLoader()).newInstance());
-            } catch (ClassNotFoundException e) {
-                console.printError("Post Exec Hook Class not found:" + e.getMessage());
-                throw e;
-            }
-        }
-
-        return pehooks;
-    }
-
-    public int execute() {
+    public int execute() throws CommandNeedRetryException {
         // execute hivesterix plan
         if (hivesterix) {
             hivesterix = false;
@@ -924,6 +1052,9 @@
                 return ret;
         }
 
+        PerfLogger perfLogger = PerfLogger.getPerfLogger();
+        perfLogger.PerfLogBegin(LOG, PerfLogger.DRIVER_EXECUTE);
+
         boolean noName = StringUtils.isEmpty(conf.getVar(HiveConf.ConfVars.HADOOPJOBNAME));
         int maxlen = conf.getIntVar(HiveConf.ConfVars.HIVEJOBNAMELENGTH);
 
@@ -932,6 +1063,10 @@
 
         conf.setVar(HiveConf.ConfVars.HIVEQUERYID, queryId);
         conf.setVar(HiveConf.ConfVars.HIVEQUERYSTRING, queryStr);
+
+        conf.set("mapreduce.workflow.id", "hive_" + queryId);
+        conf.set("mapreduce.workflow.name", queryStr);
+
         maxthreads = HiveConf.getIntVar(conf, HiveConf.ConfVars.EXECPARALLETHREADNUMBER);
 
         try {
@@ -945,14 +1080,23 @@
             }
             resStream = null;
 
-            HookContext hookContext = new HookContext(plan, conf);
+            HookContext hookContext = new HookContext(plan, conf, ctx.getPathToCS());
+            hookContext.setHookType(HookContext.HookType.PRE_EXEC_HOOK);
 
-            for (Hook peh : getPreExecHooks()) {
+            for (Hook peh : getHooks(HiveConf.ConfVars.PREEXECHOOKS)) {
                 if (peh instanceof ExecuteWithHookContext) {
+                    perfLogger.PerfLogBegin(LOG, PerfLogger.PRE_HOOK + peh.getClass().getName());
+
                     ((ExecuteWithHookContext) peh).run(hookContext);
+
+                    perfLogger.PerfLogEnd(LOG, PerfLogger.PRE_HOOK + peh.getClass().getName());
                 } else if (peh instanceof PreExecute) {
+                    perfLogger.PerfLogBegin(LOG, PerfLogger.PRE_HOOK + peh.getClass().getName());
+
                     ((PreExecute) peh).run(SessionState.get(), plan.getInputs(), plan.getOutputs(), ShimLoader
                             .getHadoopShims().getUGIForConf(conf));
+
+                    perfLogger.PerfLogEnd(LOG, PerfLogger.PRE_HOOK + peh.getClass().getName());
                 }
             }
 
@@ -967,32 +1111,36 @@
             }
             String jobname = Utilities.abbreviate(queryStr, maxlen - 6);
 
-            // A runtime that launches runnable tasks as separate Threads
-            // through
+            // A runtime that launches runnable tasks as separate Threads through
             // TaskRunners
             // As soon as a task isRunnable, it is put in a queue
             // At any time, at most maxthreads tasks can be running
-            // The main thread polls the TaskRunners to check if they have
-            // finished.
+            // The main thread polls the TaskRunners to check if they have finished.
 
-            Queue<Task<? extends Serializable>> runnable = new LinkedList<Task<? extends Serializable>>();
+            Queue<Task<? extends Serializable>> runnable = new ConcurrentLinkedQueue<Task<? extends Serializable>>();
             Map<TaskResult, TaskRunner> running = new HashMap<TaskResult, TaskRunner>();
 
             DriverContext driverCxt = new DriverContext(runnable, ctx);
+            ctx.setHDFSCleanup(true);
+
+            SessionState.get().setLastMapRedStatsList(new ArrayList<MapRedStats>());
+            SessionState.get().setStackTraces(new HashMap<String, List<List<String>>>());
+            SessionState.get().setLocalMapRedErrors(new HashMap<String, List<String>>());
 
             // Add root Tasks to runnable
-
             for (Task<? extends Serializable> tsk : plan.getRootTasks()) {
+                // This should never happen, if it does, it's a bug with the potential to produce
+                // incorrect results.
+                assert tsk.getParentTasks() == null || tsk.getParentTasks().isEmpty();
                 driverCxt.addToRunnable(tsk);
             }
 
+            perfLogger.PerfLogEnd(LOG, PerfLogger.TIME_TO_SUBMIT);
             // Loop while you either have tasks running, or tasks queued up
-
             while (running.size() != 0 || runnable.peek() != null) {
                 // Launch upto maxthreads tasks
                 while (runnable.peek() != null && running.size() < maxthreads) {
                     Task<? extends Serializable> tsk = runnable.remove();
-                    console.printInfo("executing task " + tsk.getName());
                     launchTask(tsk, queryId, noName, running, jobname, jobs, driverCxt);
                 }
 
@@ -1004,12 +1152,24 @@
 
                 int exitVal = tskRes.getExitVal();
                 if (exitVal != 0) {
+                    if (tsk.ifRetryCmdWhenFail()) {
+                        if (!running.isEmpty()) {
+                            taskCleanup(running);
+                        }
+                        // in case we decided to run everything in local mode, restore the
+                        // the jobtracker setting to its initial value
+                        ctx.restoreOriginalTracker();
+                        throw new CommandNeedRetryException();
+                    }
                     Task<? extends Serializable> backupTask = tsk.getAndInitBackupTask();
                     if (backupTask != null) {
                         errorMessage = "FAILED: Execution Error, return code " + exitVal + " from "
                                 + tsk.getClass().getName();
+                        ErrorMsg em = ErrorMsg.getErrorMsg(exitVal);
+                        if (em != null) {
+                            errorMessage += ". " + em.getMsg();
+                        }
                         console.printError(errorMessage);
-
                         errorMessage = "ATTEMPT: Execute BackupTask: " + backupTask.getClass().getName();
                         console.printError(errorMessage);
 
@@ -1020,20 +1180,31 @@
                         continue;
 
                     } else {
-                        // TODO: This error messaging is not very informative.
-                        // Fix that.
+                        hookContext.setHookType(HookContext.HookType.ON_FAILURE_HOOK);
+                        // Get all the failure execution hooks and execute them.
+                        for (Hook ofh : getHooks(HiveConf.ConfVars.ONFAILUREHOOKS)) {
+                            perfLogger.PerfLogBegin(LOG, PerfLogger.FAILURE_HOOK + ofh.getClass().getName());
+
+                            ((ExecuteWithHookContext) ofh).run(hookContext);
+
+                            perfLogger.PerfLogEnd(LOG, PerfLogger.FAILURE_HOOK + ofh.getClass().getName());
+                        }
+
                         errorMessage = "FAILED: Execution Error, return code " + exitVal + " from "
                                 + tsk.getClass().getName();
+                        ErrorMsg em = ErrorMsg.getErrorMsg(exitVal);
+                        if (em != null) {
+                            errorMessage += ". " + em.getMsg();
+                        }
                         SQLState = "08S01";
                         console.printError(errorMessage);
-                        if (running.size() != 0) {
-                            taskCleanup();
+                        if (!running.isEmpty()) {
+                            taskCleanup(running);
                         }
-                        // in case we decided to run everything in local mode,
-                        // restore the
+                        // in case we decided to run everything in local mode, restore the
                         // the jobtracker setting to its initial value
                         ctx.restoreOriginalTracker();
-                        return 9;
+                        return exitVal;
                     }
                 }
 
@@ -1046,9 +1217,9 @@
                 if (tsk.getChildTasks() != null) {
                     for (Task<? extends Serializable> child : tsk.getChildTasks()) {
                         // hivesterix: don't check launchable condition
-                        // if (DriverContext.isLaunchable(child)) {
+                        //if(DriverContext.isLaunchable(tsk)){
                         driverCxt.addToRunnable(child);
-                        // }
+                        //}
                     }
                 }
             }
@@ -1058,8 +1229,7 @@
             ctx.restoreOriginalTracker();
 
             // remove incomplete outputs.
-            // Some incomplete outputs may be added at the beginning, for eg:
-            // for dynamic partitions.
+            // Some incomplete outputs may be added at the beginning, for eg: for dynamic partitions.
             // remove them
             HashSet<WriteEntity> remOutputs = new HashSet<WriteEntity>();
             for (WriteEntity output : plan.getOutputs()) {
@@ -1072,15 +1242,24 @@
                 plan.getOutputs().remove(output);
             }
 
+            hookContext.setHookType(HookContext.HookType.POST_EXEC_HOOK);
             // Get all the post execution hooks and execute them.
-            for (Hook peh : getPostExecHooks()) {
+            for (Hook peh : getHooks(HiveConf.ConfVars.POSTEXECHOOKS)) {
                 if (peh instanceof ExecuteWithHookContext) {
+                    perfLogger.PerfLogBegin(LOG, PerfLogger.POST_HOOK + peh.getClass().getName());
+
                     ((ExecuteWithHookContext) peh).run(hookContext);
+
+                    perfLogger.PerfLogEnd(LOG, PerfLogger.POST_HOOK + peh.getClass().getName());
                 } else if (peh instanceof PostExecute) {
+                    perfLogger.PerfLogBegin(LOG, PerfLogger.POST_HOOK + peh.getClass().getName());
+
                     ((PostExecute) peh)
                             .run(SessionState.get(), plan.getInputs(), plan.getOutputs(),
                                     (SessionState.get() != null ? SessionState.get().getLineageState().getLineageInfo()
                                             : null), ShimLoader.getHadoopShims().getUGIForConf(conf));
+
+                    perfLogger.PerfLogEnd(LOG, PerfLogger.POST_HOOK + peh.getClass().getName());
                 }
             }
 
@@ -1088,7 +1267,10 @@
                 SessionState.get().getHiveHistory().setQueryProperty(queryId, Keys.QUERY_RET_CODE, String.valueOf(0));
                 SessionState.get().getHiveHistory().printRowCount(queryId);
             }
+        } catch (CommandNeedRetryException e) {
+            throw e;
         } catch (Exception e) {
+            ctx.restoreOriginalTracker();
             if (SessionState.get() != null) {
                 SessionState.get().getHiveHistory().setQueryProperty(queryId, Keys.QUERY_RET_CODE, String.valueOf(12));
             }
@@ -1104,6 +1286,18 @@
             if (noName) {
                 conf.setVar(HiveConf.ConfVars.HADOOPJOBNAME, "");
             }
+            perfLogger.PerfLogEnd(LOG, PerfLogger.DRIVER_EXECUTE);
+
+            if (SessionState.get().getLastMapRedStatsList() != null
+                    && SessionState.get().getLastMapRedStatsList().size() > 0) {
+                long totalCpu = 0;
+                console.printInfo("MapReduce Jobs Launched: ");
+                for (int i = 0; i < SessionState.get().getLastMapRedStatsList().size(); i++) {
+                    console.printInfo("Job " + i + ": " + SessionState.get().getLastMapRedStatsList().get(i));
+                    totalCpu += SessionState.get().getLastMapRedStatsList().get(i).getCpuMSec();
+                }
+                console.printInfo("Total MapReduce CPU Time Spent: " + Utilities.formatMsecToStr(totalCpu));
+            }
         }
         plan.setDone();
 
@@ -1133,14 +1327,12 @@
      *            name of the task, if it is a map-reduce job
      * @param jobs
      *            number of map-reduce jobs
-     * @param curJobNo
-     *            the sequential number of the next map-reduce job
-     * @return the updated number of last the map-reduce job launched
+     * @param cxt
+     *            the driver context
      */
 
     public void launchTask(Task<? extends Serializable> tsk, String queryId, boolean noName,
             Map<TaskResult, TaskRunner> running, String jobname, int jobs, DriverContext cxt) {
-
         if (SessionState.get() != null) {
             SessionState.get().getHiveHistory().startTask(queryId, tsk, tsk.getClass().getName());
         }
@@ -1148,6 +1340,8 @@
             if (noName) {
                 conf.setVar(HiveConf.ConfVars.HADOOPJOBNAME, jobname + "(" + tsk.getId() + ")");
             }
+            conf.set("mapreduce.workflow.node.name", tsk.getId());
+            Utilities.setWorkflowAdjacencies(conf, plan);
             cxt.incCurJobNo(1);
             console.printInfo("Launching Job " + cxt.getCurJobNo() + " out of " + jobs);
         }
@@ -1155,7 +1349,13 @@
         TaskResult tskRes = new TaskResult();
         TaskRunner tskRun = new TaskRunner(tsk, tskRes);
 
-        // HiveConf.getBoolVar(conf, HiveConf.ConfVars.EXECPARALLEL) &&
+        // Launch Task
+        //if (HiveConf.getBoolVar(conf, HiveConf.ConfVars.EXECPARALLEL) && tsk.isMapRedTask()) {
+        // Launch it in the parallel mode, as a separate thread only for MR tasks
+        //  tskRun.start();
+        //} else {
+        //  tskRun.runSequential();
+        //}
         // Launch Task: hivesterix tweak
         if (tsk instanceof MapRedTask || tsk instanceof StatsTask) {
             // Launch it in the parallel mode, as a separate thread only for MR
@@ -1168,11 +1368,27 @@
             if (crs instanceof ConditionalResolverMergeFiles) {
                 tskRes.setRunning(false);
                 tskRes.setExitVal(0);
-
-                List<Task<? extends Serializable>> children = condTask.getListTasks();
-                for (Task<? extends Serializable> child : children)
-                    if (child instanceof MapRedTask)
-                        cxt.addToRunnable(child);
+                if (!executedConditionalTsks.contains(tsk)) {
+                    List<Task<? extends Serializable>> children = condTask.getListTasks();
+                    Task<? extends Serializable> selectedBranch = null;
+                    for (Task<? extends Serializable> branch : children) {
+                        if (branch instanceof MoveTask) {
+                            selectedBranch = branch;
+                            break;
+                        }
+                    }
+                    if (selectedBranch == null) {
+                        for (int i = children.size() - 1; i >= 0; i--) {
+                            Task<? extends Serializable> child = children.get(i);
+                            if (child instanceof MapRedTask) {
+                                selectedBranch = child;
+                                break;
+                            }
+                        }
+                    }
+                    executedConditionalTsks.add(tsk);
+                    cxt.addToRunnable(selectedBranch);
+                }
             }
         } else {
             tskRun.runSequential();
@@ -1184,12 +1400,18 @@
     /**
      * Cleans up remaining tasks in case of failure
      */
-
-    public void taskCleanup() {
-        // The currently existing Shutdown hooks will be automatically called,
-        // killing the map-reduce processes.
-        // The non MR processes will be killed as well.
-        System.exit(9);
+    public void taskCleanup(Map<TaskResult, TaskRunner> running) {
+        for (Map.Entry<TaskResult, TaskRunner> entry : running.entrySet()) {
+            if (entry.getKey().isRunning()) {
+                Task<?> task = entry.getValue().getTask();
+                try {
+                    task.shutdown();
+                } catch (Exception e) {
+                    console.printError("Exception on shutting down task " + task.getId() + ": " + e);
+                }
+            }
+        }
+        running.clear();
     }
 
     /**
@@ -1213,7 +1435,7 @@
             // In this loop, nothing was found
             // Sleep 10 seconds and restart
             try {
-                Thread.sleep(sleeptime);
+                Thread.sleep(SLEEP_TIME);
             } catch (InterruptedException ie) {
                 // Do Nothing
                 ;
@@ -1222,7 +1444,7 @@
         }
     }
 
-    public boolean getResults(ArrayList<String> res) throws IOException {
+    public boolean getResults(ArrayList<String> res) throws IOException, CommandNeedRetryException {
         if (plan != null && plan.getFetchTask() != null) {
             FetchTask ft = plan.getFetchTask();
             ft.setMaxRows(maxRows);
@@ -1275,6 +1497,14 @@
         return true;
     }
 
+    public int getTryCount() {
+        return tryCount;
+    }
+
+    public void setTryCount(int tryCount) {
+        this.tryCount = tryCount;
+    }
+
     public int close() {
         try {
             if (plan != null) {
@@ -1307,18 +1537,21 @@
     }
 
     public void destroy() {
-        releaseLocks();
+        if (ctx != null) {
+            releaseLocks(ctx.getHiveLocks());
+        }
+
+        if (hiveLockMgr != null) {
+            try {
+                hiveLockMgr.close();
+            } catch (LockException e) {
+                LOG.warn("Exception in closing hive lock manager. "
+                        + org.apache.hadoop.util.StringUtils.stringifyException(e));
+            }
+        }
     }
 
     public org.apache.hadoop.hive.ql.plan.api.Query getQueryPlan() throws IOException {
         return plan.getQueryPlan();
     }
-
-    public int getTryCount() {
-        return tryCount;
-    }
-
-    public void setTryCount(int tryCount) {
-        this.tryCount = tryCount;
-    }
 }
diff --git a/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFCount.java b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFCount.java
index 2d5191d..1b96259 100644
--- a/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFCount.java
+++ b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFCount.java
@@ -68,6 +68,7 @@
     @Override
     public GenericUDAFEvaluator getEvaluator(GenericUDAFParameterInfo paramInfo) throws SemanticException {
 
+        @SuppressWarnings("deprecation")
         TypeInfo[] parameters = paramInfo.getParameters();
 
         if (parameters.length == 0) {
diff --git a/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/serde2/typeinfo/TypeInfoFactory.java b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/serde2/typeinfo/TypeInfoFactory.java
index 0fea4b9..e26f477 100644
--- a/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/serde2/typeinfo/TypeInfoFactory.java
+++ b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/serde2/typeinfo/TypeInfoFactory.java
@@ -36,7 +36,7 @@
 import java.util.List;
 import java.util.concurrent.ConcurrentHashMap;
 
-import org.apache.hadoop.hive.serde.Constants;
+import org.apache.hadoop.hive.serde.serdeConstants;
 import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorUtils;
 
 /**
@@ -65,15 +65,18 @@
         return result;
     }
 
-    public static final TypeInfo voidTypeInfo = getPrimitiveTypeInfo(Constants.VOID_TYPE_NAME);
-    public static final TypeInfo booleanTypeInfo = getPrimitiveTypeInfo(Constants.BOOLEAN_TYPE_NAME);
-    public static final TypeInfo intTypeInfo = getPrimitiveTypeInfo(Constants.INT_TYPE_NAME);
-    public static final TypeInfo longTypeInfo = getPrimitiveTypeInfo(Constants.BIGINT_TYPE_NAME);
-    public static final TypeInfo stringTypeInfo = getPrimitiveTypeInfo(Constants.STRING_TYPE_NAME);
-    public static final TypeInfo floatTypeInfo = getPrimitiveTypeInfo(Constants.FLOAT_TYPE_NAME);
-    public static final TypeInfo doubleTypeInfo = getPrimitiveTypeInfo(Constants.DOUBLE_TYPE_NAME);
-    public static final TypeInfo byteTypeInfo = getPrimitiveTypeInfo(Constants.TINYINT_TYPE_NAME);
-    public static final TypeInfo shortTypeInfo = getPrimitiveTypeInfo(Constants.SMALLINT_TYPE_NAME);
+    public static final TypeInfo voidTypeInfo = getPrimitiveTypeInfo(serdeConstants.VOID_TYPE_NAME);
+    public static final TypeInfo booleanTypeInfo = getPrimitiveTypeInfo(serdeConstants.BOOLEAN_TYPE_NAME);
+    public static final TypeInfo intTypeInfo = getPrimitiveTypeInfo(serdeConstants.INT_TYPE_NAME);
+    public static final TypeInfo longTypeInfo = getPrimitiveTypeInfo(serdeConstants.BIGINT_TYPE_NAME);
+    public static final TypeInfo stringTypeInfo = getPrimitiveTypeInfo(serdeConstants.STRING_TYPE_NAME);
+    public static final TypeInfo floatTypeInfo = getPrimitiveTypeInfo(serdeConstants.FLOAT_TYPE_NAME);
+    public static final TypeInfo doubleTypeInfo = getPrimitiveTypeInfo(serdeConstants.DOUBLE_TYPE_NAME);
+    public static final TypeInfo byteTypeInfo = getPrimitiveTypeInfo(serdeConstants.TINYINT_TYPE_NAME);
+    public static final TypeInfo shortTypeInfo = getPrimitiveTypeInfo(serdeConstants.SMALLINT_TYPE_NAME);
+    public static final TypeInfo timestampTypeInfo = getPrimitiveTypeInfo(serdeConstants.TIMESTAMP_TYPE_NAME);
+    public static final TypeInfo binaryTypeInfo = getPrimitiveTypeInfo(serdeConstants.BINARY_TYPE_NAME);
+    public static final TypeInfo decimalTypeInfo = getPrimitiveTypeInfo(serdeConstants.DECIMAL_TYPE_NAME);
 
     public static final TypeInfo unknownTypeInfo = getPrimitiveTypeInfo("unknown");
 
diff --git a/hivesterix/hivesterix-dist/src/main/resources/conf/hive-default.xml b/hivesterix/hivesterix-dist/src/main/resources/conf/hive-default.xml
deleted file mode 100644
index 1fce28e..0000000
--- a/hivesterix/hivesterix-dist/src/main/resources/conf/hive-default.xml
+++ /dev/null
@@ -1,772 +0,0 @@
-<?xml version="1.0"?>
-<!--
- ! 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.
- !-->
-<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
-
-<configuration>
-
-	<!-- Hive Configuration can either be stored in this file or in the hadoop 
-		configuration files -->
-	<!-- that are implied by Hadoop setup variables. -->
-	<!-- Aside from Hadoop setup variables - this file is provided as a convenience 
-		so that Hive -->
-	<!-- users do not have to edit hadoop configuration files (that may be managed 
-		as a centralized -->
-	<!-- resource). -->
-
-	<!-- Hive Execution Parameters -->
-	<property>
-		<name>mapred.reduce.tasks</name>
-		<value>-1</value>
-		<description>The default number of reduce tasks per job. Typically set
-			to a prime close to the number of available hosts. Ignored when
-			mapred.job.tracker is "local". Hadoop set this to 1 by default,
-			whereas hive uses -1 as its default value.
-			By setting this property to -1, Hive will automatically figure out what
-			should be the number of reducers.
-  </description>
-
-        <property>
-		<name>hive.hyracks.connectorpolicy</name>
-		<value>PIPELINING</value>
-        </property>
-
-	<property>
-		<name>hive.hyracks.parrallelism</name>
-		<value>4</value>
-	</property>
-
-	<property>
-		<name>hive.algebricks.groupby.external</name>
-		<value>true</value>
-	</property>
-	
-	<property>
-		<name>hive.algebricks.groupby.external.memory</name>
-		<value>33554432</value>
-	</property>
-	
-	<property>
-		<name>hive.algebricks.sort.memory</name>
-		<value>33554432</value>
-	</property>
-
-	<property>
-		<name>hive.exec.reducers.bytes.per.reducer</name>
-		<value>1000000000</value>
-		<description>size per reducer.The default is 1G, i.e if the input size
-			is 10G, it will use 10 reducers.</description>
-	</property>
-
-	<property>
-		<name>hive.exec.reducers.max</name>
-		<value>999</value>
-		<description>max number of reducers will be used. If the one
-			specified in the configuration parameter mapred.reduce.tasks is
-			negative, hive will use this one as the max number of reducers when
-			automatically determine number of reducers.</description>
-	</property>
-
-	<property>
-		<name>hive.exec.scratchdir</name>
-		<value>/hive-${user.name}</value>
-		<description>Scratch space for Hive jobs</description>
-	</property>
-
-	<property>
-		<name>hive.test.mode</name>
-		<value>false</value>
-		<description>whether hive is running in test mode. If yes, it turns on
-			sampling and prefixes the output tablename</description>
-	</property>
-
-	<property>
-		<name>hive.test.mode.prefix</name>
-		<value>test_</value>
-		<description>if hive is running in test mode, prefixes the output
-			table by this string</description>
-	</property>
-
-	<!-- If the input table is not bucketed, the denominator of the tablesample 
-		is determinied by the parameter below -->
-	<!-- For example, the following query: -->
-	<!-- INSERT OVERWRITE TABLE dest -->
-	<!-- SELECT col1 from src -->
-	<!-- would be converted to -->
-	<!-- INSERT OVERWRITE TABLE test_dest -->
-	<!-- SELECT col1 from src TABLESAMPLE (BUCKET 1 out of 32 on rand(1)) -->
-	<property>
-		<name>hive.test.mode.samplefreq</name>
-		<value>32</value>
-		<description>if hive is running in test mode and table is not
-			bucketed, sampling frequency</description>
-	</property>
-
-	<property>
-		<name>hive.test.mode.nosamplelist</name>
-		<value></value>
-		<description>if hive is running in test mode, dont sample the above
-			comma seperated list of tables</description>
-	</property>
-
-	<property>
-		<name>hive.metastore.local</name>
-		<value>true</value>
-		<description>controls whether to connect to remove metastore server or
-			open a new metastore server in Hive Client JVM</description>
-	</property>
-
-	<property>
-		<name>javax.jdo.option.ConnectionURL</name>
-		<value>jdbc:derby:;databaseName=metastore_db;create=true</value>
-		<description>JDBC connect string for a JDBC metastore</description>
-	</property>
-
-	<property>
-		<name>javax.jdo.option.ConnectionDriverName</name>
-		<value>org.apache.derby.jdbc.EmbeddedDriver</value>
-		<description>Driver class name for a JDBC metastore</description>
-	</property>
-
-	<property>
-		<name>javax.jdo.PersistenceManagerFactoryClass</name>
-		<value>org.datanucleus.jdo.JDOPersistenceManagerFactory</value>
-		<description>class implementing the jdo persistence</description>
-	</property>
-
-	<property>
-		<name>datanucleus.connectionPoolingType</name>
-		<value>DBCP</value>
-		<description>Uses a DBCP connection pool for JDBC metastore
-		</description>
-	</property>
-
-	<property>
-		<name>javax.jdo.option.DetachAllOnCommit</name>
-		<value>true</value>
-		<description>detaches all objects from session so that they can be
-			used after transaction is committed</description>
-	</property>
-
-	<property>
-		<name>javax.jdo.option.NonTransactionalRead</name>
-		<value>true</value>
-		<description>reads outside of transactions</description>
-	</property>
-
-	<property>
-		<name>javax.jdo.option.ConnectionUserName</name>
-		<value>APP</value>
-		<description>username to use against metastore database</description>
-	</property>
-
-	<property>
-		<name>javax.jdo.option.ConnectionPassword</name>
-		<value>mine</value>
-		<description>password to use against metastore database</description>
-	</property>
-
-	<property>
-		<name>datanucleus.validateTables</name>
-		<value>false</value>
-		<description>validates existing schema against code. turn this on if
-			you want to verify existing schema </description>
-	</property>
-
-	<property>
-		<name>datanucleus.validateColumns</name>
-		<value>false</value>
-		<description>validates existing schema against code. turn this on if
-			you want to verify existing schema </description>
-	</property>
-
-	<property>
-		<name>datanucleus.validateConstraints</name>
-		<value>false</value>
-		<description>validates existing schema against code. turn this on if
-			you want to verify existing schema </description>
-	</property>
-
-	<property>
-		<name>datanucleus.storeManagerType</name>
-		<value>rdbms</value>
-		<description>metadata store type</description>
-	</property>
-
-	<property>
-		<name>datanucleus.autoCreateSchema</name>
-		<value>true</value>
-		<description>creates necessary schema on a startup if one doesn't
-			exist. set this to false, after creating it once</description>
-	</property>
-
-	<property>
-		<name>datanucleus.autoStartMechanismMode</name>
-		<value>checked</value>
-		<description>throw exception if metadata tables are incorrect
-		</description>
-	</property>
-
-	<property>
-		<name>datanucleus.transactionIsolation</name>
-		<value>read-committed</value>
-		<description>Default transaction isolation level for identity
-			generation. </description>
-	</property>
-
-	<property>
-		<name>datanucleus.cache.level2</name>
-		<value>false</value>
-		<description>Use a level 2 cache. Turn this off if metadata is changed
-			independently of hive metastore server</description>
-	</property>
-
-	<property>
-		<name>datanucleus.cache.level2.type</name>
-		<value>SOFT</value>
-		<description>SOFT=soft reference based cache, WEAK=weak reference
-			based cache.</description>
-	</property>
-
-	<property>
-		<name>datanucleus.identifierFactory</name>
-		<value>datanucleus</value>
-		<description>Name of the identifier factory to use when generating
-			table/column names etc. 'datanucleus' is used for backward
-			compatibility</description>
-	</property>
-
-	<property>
-		<name>hive.metastore.warehouse.dir</name>
-		<value>/user/hivesterix</value>
-		<description>location of default database for the warehouse
-		</description>
-	</property>
-
-	<property>
-		<name>hive.metastore.connect.retries</name>
-		<value>5</value>
-		<description>Number of retries while opening a connection to metastore
-		</description>
-	</property>
-
-	<property>
-		<name>hive.metastore.rawstore.impl</name>
-		<value>org.apache.hadoop.hive.metastore.ObjectStore</value>
-		<description>Name of the class that implements
-			org.apache.hadoop.hive.metastore.rawstore interface. This class is
-			used to store and retrieval of raw metadata objects such as table,
-			database</description>
-	</property>
-
-	<property>
-		<name>hive.default.fileformat</name>
-		<value>TextFile</value>
-		<description>Default file format for CREATE TABLE statement. Options
-			are TextFile and SequenceFile. Users can explicitly say CREATE TABLE
-			... STORED AS &lt;TEXTFILE|SEQUENCEFILE&gt; to override</description>
-	</property>
-
-	<property>
-		<name>hive.fileformat.check</name>
-		<value>true</value>
-		<description>Whether to check file format or not when loading data
-			files</description>
-	</property>
-
-	<property>
-		<name>hive.map.aggr</name>
-		<value>true</value>
-		<description>Whether to use map-side aggregation in Hive Group By
-			queries</description>
-	</property>
-
-	<property>
-		<name>hive.groupby.skewindata</name>
-		<value>false</value>
-		<description>Whether there is skew in data to optimize group by
-			queries</description>
-	</property>
-
-	<property>
-		<name>hive.groupby.mapaggr.checkinterval</name>
-		<value>100000</value>
-		<description>Number of rows after which size of the grouping
-			keys/aggregation classes is performed</description>
-	</property>
-
-	<property>
-		<name>hive.mapred.local.mem</name>
-		<value>0</value>
-		<description>For local mode, memory of the mappers/reducers
-		</description>
-	</property>
-
-	<property>
-		<name>hive.map.aggr.hash.percentmemory</name>
-		<value>0.5</value>
-		<description>Portion of total memory to be used by map-side grup
-			aggregation hash table</description>
-	</property>
-
-	<property>
-		<name>hive.map.aggr.hash.min.reduction</name>
-		<value>0.5</value>
-		<description>Hash aggregation will be turned off if the ratio between
-			hash
-			table size and input rows is bigger than this number. Set to 1 to make
-			sure
-			hash aggregation is never turned off.</description>
-	</property>
-
-	<property>
-		<name>hive.optimize.cp</name>
-		<value>true</value>
-		<description>Whether to enable column pruner</description>
-	</property>
-
-	<property>
-		<name>hive.optimize.ppd</name>
-		<value>true</value>
-		<description>Whether to enable predicate pushdown</description>
-	</property>
-
-	<property>
-		<name>hive.optimize.pruner</name>
-		<value>true</value>
-		<description>Whether to enable the new partition pruner which depends
-			on predicate pushdown. If this is disabled,
-			the old partition pruner which is based on AST will be enabled.
-		</description>
-	</property>
-
-	<property>
-		<name>hive.optimize.groupby</name>
-		<value>true</value>
-		<description>Whether to enable the bucketed group by from bucketed
-			partitions/tables.</description>
-	</property>
-
-	<property>
-		<name>hive.join.emit.interval</name>
-		<value>1000</value>
-		<description>How many rows in the right-most join operand Hive should
-			buffer before emitting the join result. </description>
-	</property>
-
-	<property>
-		<name>hive.join.cache.size</name>
-		<value>25000</value>
-		<description>How many rows in the joining tables (except the streaming
-			table) should be cached in memory. </description>
-	</property>
-
-	<property>
-		<name>hive.mapjoin.bucket.cache.size</name>
-		<value>100</value>
-		<description>How many values in each keys in the map-joined table
-			should be cached in memory. </description>
-	</property>
-
-	<property>
-		<name>hive.mapjoin.maxsize</name>
-		<value>100000</value>
-		<description>Maximum # of rows of the small table that can be handled
-			by map-side join. If the size is reached and hive.task.progress is
-			set, a fatal error counter is set and the job will be killed.
-		</description>
-	</property>
-
-	<property>
-		<name>hive.mapjoin.cache.numrows</name>
-		<value>25000</value>
-		<description>How many rows should be cached by jdbm for map join.
-		</description>
-	</property>
-
-	<property>
-		<name>hive.optimize.skewjoin</name>
-		<value>false</value>
-		<description>Whether to enable skew join optimization. </description>
-	</property>
-
-	<property>
-		<name>hive.skewjoin.key</name>
-		<value>100000</value>
-		<description>Determine if we get a skew key in join. If we see more
-			than the specified number of rows with the same key in join operator,
-			we think the key as a skew join key. </description>
-	</property>
-
-	<property>
-		<name>hive.skewjoin.mapjoin.map.tasks</name>
-		<value>10000</value>
-		<description> Determine the number of map task used in the follow up
-			map join job
-			for a skew join. It should be used together with
-			hive.skewjoin.mapjoin.min.split
-			to perform a fine grained control.</description>
-	</property>
-
-	<property>
-		<name>hive.skewjoin.mapjoin.min.split</name>
-		<value>33554432</value>
-		<description> Determine the number of map task at most used in the
-			follow up map join job
-			for a skew join by specifying the minimum split size. It should be used
-			together with
-			hive.skewjoin.mapjoin.map.tasks to perform a fine grained control.</description>
-	</property>
-
-	<property>
-		<name>hive.mapred.mode</name>
-		<value>nonstrict</value>
-		<description>The mode in which the hive operations are being
-			performed. In strict mode, some risky queries are not allowed to run
-		</description>
-	</property>
-
-	<property>
-		<name>hive.exec.script.maxerrsize</name>
-		<value>100000</value>
-		<description>Maximum number of bytes a script is allowed to emit to
-			standard error (per map-reduce task). This prevents runaway scripts
-			from filling logs partitions to capacity </description>
-	</property>
-
-	<property>
-		<name>hive.exec.script.allow.partial.consumption</name>
-		<value>false</value>
-		<description> When enabled, this option allows a user script to exit
-			successfully without consuming all the data from the standard input.
-		</description>
-	</property>
-
-	<property>
-		<name>hive.script.operator.id.env.var</name>
-		<value>HIVE_SCRIPT_OPERATOR_ID</value>
-		<description> Name of the environment variable that holds the unique
-			script operator ID in the user's transform function (the custom
-			mapper/reducer that the user has specified in the query)
-		</description>
-	</property>
-
-	<property>
-		<name>hive.exec.compress.output</name>
-		<value>false</value>
-		<description> This controls whether the final outputs of a query (to a
-			local/hdfs file or a hive table) is compressed. The compression codec
-			and other options are determined from hadoop config variables
-			mapred.output.compress* </description>
-	</property>
-
-	<property>
-		<name>hive.exec.compress.intermediate</name>
-		<value>false</value>
-		<description> This controls whether intermediate files produced by
-			hive between multiple map-reduce jobs are compressed. The compression
-			codec and other options are determined from hadoop config variables
-			mapred.output.compress* </description>
-	</property>
-
-	<property>
-		<name>hive.exec.parallel</name>
-		<value>false</value>
-		<description>Whether to execute jobs in parallel</description>
-	</property>
-
-	<property>
-		<name>hive.exec.parallel.thread.number</name>
-		<value>8</value>
-		<description>How many jobs at most can be executed in parallel
-		</description>
-	</property>
-
-	<property>
-		<name>hive.hwi.war.file</name>
-		<value>lib\hive-hwi-0.7.0.war</value>
-		<description>This sets the path to the HWI war file, relative to
-			${HIVE_HOME}. </description>
-	</property>
-
-	<property>
-		<name>hive.hwi.listen.host</name>
-		<value>0.0.0.0</value>
-		<description>This is the host address the Hive Web Interface will
-			listen on</description>
-	</property>
-
-	<property>
-		<name>hive.hwi.listen.port</name>
-		<value>9999</value>
-		<description>This is the port the Hive Web Interface will listen on
-		</description>
-	</property>
-
-	<property>
-		<name>hive.exec.pre.hooks</name>
-		<value></value>
-		<description>Pre Execute Hook for Tests</description>
-	</property>
-
-	<property>
-		<name>hive.merge.mapfiles</name>
-		<value>true</value>
-		<description>Merge small files at the end of a map-only job
-		</description>
-	</property>
-
-	<property>
-		<name>hive.merge.mapredfiles</name>
-		<value>false</value>
-		<description>Merge small files at the end of a map-reduce job
-		</description>
-	</property>
-
-	<property>
-		<name>hive.heartbeat.interval</name>
-		<value>1000</value>
-		<description>Send a heartbeat after this interval - used by mapjoin
-			and filter operators</description>
-	</property>
-
-	<property>
-		<name>hive.merge.size.per.task</name>
-		<value>256000000</value>
-		<description>Size of merged files at the end of the job</description>
-	</property>
-
-	<property>
-		<name>hive.merge.size.smallfiles.avgsize</name>
-		<value>16000000</value>
-		<description>When the average output file size of a job is less than
-			this number, Hive will start an additional map-reduce job to merge
-			the output files into bigger files. This is only done for map-only
-			jobs if hive.merge.mapfiles is true, and for map-reduce jobs if
-			hive.merge.mapredfiles is true.</description>
-	</property>
-
-	<property>
-		<name>hive.script.auto.progress</name>
-		<value>false</value>
-		<description>Whether Hive Tranform/Map/Reduce Clause should
-			automatically send progress information to TaskTracker to avoid the
-			task getting killed because of inactivity. Hive sends progress
-			information when the script is outputting to stderr. This option
-			removes the need of periodically producing stderr messages, but users
-			should be cautious because this may prevent infinite loops in the
-			scripts to be killed by TaskTracker.  </description>
-	</property>
-
-	<property>
-		<name>hive.script.serde</name>
-		<value>org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe</value>
-		<description>The default serde for trasmitting input data to and
-			reading output data from the user scripts. </description>
-	</property>
-
-	<property>
-		<name>hive.script.recordreader</name>
-		<value>org.apache.hadoop.hive.ql.exec.TextRecordReader</value>
-		<description>The default record reader for reading data from the user
-			scripts. </description>
-	</property>
-
-	<property>
-		<name>hive.script.recordwriter</name>
-		<value>org.apache.hadoop.hive.ql.exec.TextRecordWriter</value>
-		<description>The default record writer for writing data to the user
-			scripts. </description>
-	</property>
-
-	<property>
-		<name>hive.input.format</name>
-		<value>org.apache.hadoop.hive.ql.io.HiveInputFormat</value>
-		<description>The default input format, if it is not specified, the
-			system assigns it. It is set to HiveInputFormat for hadoop versions
-			17, 18 and 19, whereas it is set to CombinedHiveInputFormat for
-			hadoop 20. The user can always overwrite it - if there is a bug in
-			CombinedHiveInputFormat, it can always be manually set to
-			HiveInputFormat. </description>
-	</property>
-
-	<property>
-		<name>hive.udtf.auto.progress</name>
-		<value>false</value>
-		<description>Whether Hive should automatically send progress
-			information to TaskTracker when using UDTF's to prevent the task
-			getting killed because of inactivity. Users should be cautious
-			because this may prevent TaskTracker from killing tasks with infinte
-			loops.  </description>
-	</property>
-
-	<property>
-		<name>hive.mapred.reduce.tasks.speculative.execution</name>
-		<value>true</value>
-		<description>Whether speculative execution for reducers should be
-			turned on. </description>
-	</property>
-
-	<property>
-		<name>hive.exec.counters.pull.interval</name>
-		<value>1000</value>
-		<description>The interval with which to poll the JobTracker for the
-			counters the running job. The smaller it is the more load there will
-			be on the jobtracker, the higher it is the less granular the caught
-			will be.</description>
-	</property>
-
-	<property>
-		<name>hive.enforce.bucketing</name>
-		<value>false</value>
-		<description>Whether bucketing is enforced. If true, while inserting
-			into the table, bucketing is enforced. </description>
-	</property>
-
-	<property>
-		<name>hive.enforce.sorting</name>
-		<value>false</value>
-		<description>Whether sorting is enforced. If true, while inserting
-			into the table, sorting is enforced. </description>
-	</property>
-
-	<property>
-		<name>hive.metastore.ds.connection.url.hook</name>
-		<value></value>
-		<description>Name of the hook to use for retriving the JDO connection
-			URL. If empty, the value in javax.jdo.option.ConnectionURL is used
-		</description>
-	</property>
-
-	<property>
-		<name>hive.metastore.ds.retry.attempts</name>
-		<value>1</value>
-		<description>The number of times to retry a metastore call if there
-			were a connection error</description>
-	</property>
-
-	<property>
-		<name>hive.metastore.ds.retry.interval</name>
-		<value>1000</value>
-		<description>The number of miliseconds between metastore retry
-			attempts</description>
-	</property>
-
-	<property>
-		<name>hive.metastore.server.min.threads</name>
-		<value>200</value>
-		<description>Minimum number of worker threads in the Thrift server's
-			pool.</description>
-	</property>
-
-	<property>
-		<name>hive.metastore.server.max.threads</name>
-		<value>100000</value>
-		<description>Maximum number of worker threads in the Thrift server's
-			pool.</description>
-	</property>
-
-	<property>
-		<name>hive.metastore.server.tcp.keepalive</name>
-		<value>true</value>
-		<description>Whether to enable TCP keepalive for the metastore server.
-			Keepalive will prevent accumulation of half-open connections.
-		</description>
-	</property>
-
-	<property>
-		<name>hive.optimize.reducededuplication</name>
-		<value>true</value>
-		<description>Remove extra map-reduce jobs if the data is already
-			clustered by the same key which needs to be used again. This should
-			always be set to true. Since it is a new feature, it has been made
-			configurable.</description>
-	</property>
-
-	<property>
-		<name>hive.exec.dynamic.partition</name>
-		<value>false</value>
-		<description>Whether or not to allow dynamic partitions in DML/DDL.
-		</description>
-	</property>
-
-	<property>
-		<name>hive.exec.dynamic.partition.mode</name>
-		<value>strict</value>
-		<description>In strict mode, the user must specify at least one static
-			partition in case the user accidentally overwrites all partitions.
-		</description>
-	</property>
-
-	<property>
-		<name>hive.exec.max.dynamic.partitions</name>
-		<value>1000</value>
-		<description>Maximum number of dynamic partitions allowed to be
-			created in total.</description>
-	</property>
-
-	<property>
-		<name>hive.exec.max.dynamic.partitions.pernode</name>
-		<value>100</value>
-		<description>Maximum number of dynamic partitions allowed to be
-			created in each mapper/reducer node.</description>
-	</property>
-
-	<property>
-		<name>hive.default.partition.name</name>
-		<value>__HIVE_DEFAULT_PARTITION__</value>
-		<description>The default partition name in case the dynamic partition
-			column value is null/empty string or anyother values that cannot be
-			escaped. This value must not contain any special character used in
-			HDFS URI (e.g., ':', '%', '/' etc). The user has to be aware that the
-			dynamic partition value should not contain this value to avoid
-			confusions.</description>
-	</property>
-
-	<property>
-		<name>fs.har.impl</name>
-		<value>org.apache.hadoop.hive.shims.HiveHarFileSystem</value>
-		<description>The implementation for accessing Hadoop Archives. Note
-			that this won't be applicable to Hadoop vers less than 0.20
-		</description>
-	</property>
-
-	<property>
-		<name>hive.archive.enabled</name>
-		<value>false</value>
-		<description>Whether archiving operations are permitted</description>
-	</property>
-
-	<property>
-		<name>hive.archive.har.parentdir.settable</name>
-		<value>false</value>
-		<description>In new Hadoop versions, the parent directory must be set
-			while
-			creating a HAR. Because this functionality is hard to detect with just
-			version
-			numbers, this conf var needs to be set manually.</description>
-	</property>
-
-	<!-- HBase Storage Handler Parameters -->
-
-	<property>
-		<name>hive.hbase.wal.enabled</name>
-		<value>true</value>
-		<description>Whether writes to HBase should be forced to the
-			write-ahead log. Disabling this improves HBase write performance at
-			the risk of lost writes in case of a crash.</description>
-	</property>
-
-</configuration>
diff --git a/hivesterix/hivesterix-dist/src/main/resources/conf/hive-log4j.properties b/hivesterix/hivesterix-dist/src/main/resources/conf/hive-log4j.properties
index eab38a6..6f195f5 100644
--- a/hivesterix/hivesterix-dist/src/main/resources/conf/hive-log4j.properties
+++ b/hivesterix/hivesterix-dist/src/main/resources/conf/hive-log4j.properties
@@ -31,7 +31,7 @@
 #      FATAL, ERROR, WARN, INFO, DEBUG
 #
 #------------------------------------------------------------------------------
-log4j.rootCategory=INFO, S
+log4j.rootCategory=FATAL, S
 
 log4j.logger.com.dappit.Dapper.parser=ERROR
 log4j.logger.org.w3c.tidy=FATAL
diff --git a/hivesterix/hivesterix-dist/src/main/resources/conf/hive-site.xml b/hivesterix/hivesterix-dist/src/main/resources/conf/hive-site.xml
new file mode 100644
index 0000000..ccfcd74
--- /dev/null
+++ b/hivesterix/hivesterix-dist/src/main/resources/conf/hive-site.xml
@@ -0,0 +1,5189 @@
+<?xml version="1.0"?>
+<!-- ! 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. ! -->
+<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
+
+<configuration>
+
+	<configuration>
+		<!-- Hivesterix Execution Parameters -->
+		<property>
+			<name>hive.hyracks.connectorpolicy</name>
+			<value>PIPELINING</value>
+		</property>
+
+		<property>
+			<name>hive.hyracks.parrallelism</name>
+			<value>4</value>
+		</property>
+
+		<property>
+			<name>hive.algebricks.groupby.external</name>
+			<value>true</value>
+		</property>
+		
+		<property>
+			<name>hive.algebricks.groupby.external.memory</name>
+			<value>33554432</value>
+		</property>
+
+		<property>
+			<name>hive.algebricks.sort.memory</name>
+			<value>33554432</value>
+		</property>
+		
+		<property>
+            <name>hive.algebricks.framesize</name>
+            <value>32768</value>
+        </property>
+
+		<!-- Hive Execution Parameters -->
+		<property>
+			<name>mapred.reduce.tasks</name>
+			<value>-1</value>
+			<description>The default number of reduce tasks per job. Typically
+				set
+				to a prime close to the number of available hosts. Ignored when
+				mapred.job.tracker is "local". Hadoop set this to 1 by default,
+				whereas hive uses -1 as its default value.
+				By setting this property
+				to -1, Hive will automatically figure out
+				what should be the number
+				of reducers.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.reducers.bytes.per.reducer</name>
+			<value>1000000000</value>
+			<description>size per reducer.The default is 1G, i.e if the input
+				size is 10G, it will use 10 reducers.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.reducers.max</name>
+			<value>999</value>
+			<description>max number of reducers will be used. If the one
+				specified in the configuration parameter mapred.reduce.tasks is
+				negative, hive will use this one as the max number of reducers when
+				automatically determine number of reducers.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.cli.print.header</name>
+			<value>false</value>
+			<description>Whether to print the names of the columns in query
+				output.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.cli.print.current.db</name>
+			<value>false</value>
+			<description>Whether to include the current database in the hive
+				prompt.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.cli.prompt</name>
+			<value>hive</value>
+			<description>Command line prompt configuration value. Other hiveconf
+				can be used in
+				this configuration value. Variable substitution will
+				only be invoked at
+				the hive
+				cli startup.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.cli.pretty.output.num.cols</name>
+			<value>-1</value>
+			<description>The number of columns to use when formatting output
+				generated
+				by the DESCRIBE PRETTY table_name command. If the value of
+				this
+				property
+				is -1, then hive will use the auto-detected terminal
+				width.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.scratchdir</name>
+			<value>/tmp/hive-${user.name}</value>
+			<description>Scratch space for Hive jobs</description>
+		</property>
+
+		<property>
+			<name>hive.exec.local.scratchdir</name>
+			<value>/tmp/${user.name}</value>
+			<description>Local scratch space for Hive jobs</description>
+		</property>
+
+		<property>
+			<name>hive.test.mode</name>
+			<value>false</value>
+			<description>whether hive is running in test mode. If yes, it turns
+				on sampling and prefixes the output tablename
+			</description>
+		</property>
+
+		<property>
+			<name>hive.test.mode.prefix</name>
+			<value>test_</value>
+			<description>if hive is running in test mode, prefixes the output
+				table by this string
+			</description>
+		</property>
+
+		<!-- If the input table is not bucketed, the denominator of the tablesample 
+			is determinied by the parameter below -->
+		<!-- For example, the following query: -->
+		<!-- INSERT OVERWRITE TABLE dest -->
+		<!-- SELECT col1 from src -->
+		<!-- would be converted to -->
+		<!-- INSERT OVERWRITE TABLE test_dest -->
+		<!-- SELECT col1 from src TABLESAMPLE (BUCKET 1 out of 32 on rand(1)) -->
+		<property>
+			<name>hive.test.mode.samplefreq</name>
+			<value>32</value>
+			<description>if hive is running in test mode and table is not
+				bucketed, sampling frequency
+			</description>
+		</property>
+
+		<property>
+			<name>hive.test.mode.nosamplelist</name>
+			<value></value>
+			<description>if hive is running in test mode, dont sample the above
+				comma seperated list of tables
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.uris</name>
+			<value></value>
+			<description>Thrift uri for the remote metastore. Used by metastore
+				client to connect to remote metastore.
+			</description>
+		</property>
+
+		<property>
+			<name>javax.jdo.option.ConnectionURL</name>
+			<value>jdbc:derby:;databaseName=metastore_db;create=true</value>
+			<description>JDBC connect string for a JDBC metastore</description>
+		</property>
+
+		<property>
+			<name>javax.jdo.option.ConnectionDriverName</name>
+			<value>org.apache.derby.jdbc.EmbeddedDriver</value>
+			<description>Driver class name for a JDBC metastore</description>
+		</property>
+
+		<property>
+			<name>javax.jdo.PersistenceManagerFactoryClass</name>
+			<value>org.datanucleus.jdo.JDOPersistenceManagerFactory</value>
+			<description>class implementing the jdo persistence</description>
+		</property>
+
+		<property>
+			<name>javax.jdo.option.DetachAllOnCommit</name>
+			<value>true</value>
+			<description>detaches all objects from session so that they can be
+				used after transaction is committed
+			</description>
+		</property>
+
+		<property>
+			<name>javax.jdo.option.NonTransactionalRead</name>
+			<value>true</value>
+			<description>reads outside of transactions</description>
+		</property>
+
+		<property>
+			<name>javax.jdo.option.ConnectionUserName</name>
+			<value>APP</value>
+			<description>username to use against metastore database</description>
+		</property>
+
+		<property>
+			<name>javax.jdo.option.ConnectionPassword</name>
+			<value>mine</value>
+			<description>password to use against metastore database</description>
+		</property>
+
+		<property>
+			<name>javax.jdo.option.Multithreaded</name>
+			<value>true</value>
+			<description>Set this to true if multiple threads access metastore
+				through JDO concurrently.
+			</description>
+		</property>
+
+		<property>
+			<name>datanucleus.connectionPoolingType</name>
+			<value>DBCP</value>
+			<description>Uses a DBCP connection pool for JDBC metastore
+			</description>
+		</property>
+
+		<property>
+			<name>datanucleus.validateTables</name>
+			<value>false</value>
+			<description>validates existing schema against code. turn this on if
+				you want to verify existing schema
+			</description>
+		</property>
+
+		<property>
+			<name>datanucleus.validateColumns</name>
+			<value>false</value>
+			<description>validates existing schema against code. turn this on if
+				you want to verify existing schema
+			</description>
+		</property>
+
+		<property>
+			<name>datanucleus.validateConstraints</name>
+			<value>false</value>
+			<description>validates existing schema against code. turn this on if
+				you want to verify existing schema
+			</description>
+		</property>
+
+		<property>
+			<name>datanucleus.storeManagerType</name>
+			<value>rdbms</value>
+			<description>metadata store type</description>
+		</property>
+
+		<property>
+			<name>datanucleus.autoCreateSchema</name>
+			<value>true</value>
+			<description>creates necessary schema on a startup if one doesn't
+				exist. set this to false, after creating it once
+			</description>
+		</property>
+
+		<property>
+			<name>datanucleus.autoStartMechanismMode</name>
+			<value>checked</value>
+			<description>throw exception if metadata tables are incorrect
+			</description>
+		</property>
+
+		<property>
+			<name>datanucleus.transactionIsolation</name>
+			<value>read-committed</value>
+			<description>Default transaction isolation level for identity
+				generation.
+			</description>
+		</property>
+
+		<property>
+			<name>datanucleus.cache.level2</name>
+			<value>false</value>
+			<description>Use a level 2 cache. Turn this off if metadata is
+				changed independently of hive metastore server
+			</description>
+		</property>
+
+		<property>
+			<name>datanucleus.cache.level2.type</name>
+			<value>SOFT</value>
+			<description>SOFT=soft reference based cache, WEAK=weak reference
+				based cache.
+			</description>
+		</property>
+
+		<property>
+			<name>datanucleus.identifierFactory</name>
+			<value>datanucleus</value>
+			<description>Name of the identifier factory to use when generating
+				table/column names etc. 'datanucleus' is used for backward
+				compatibility
+			</description>
+		</property>
+
+		<property>
+			<name>datanucleus.plugin.pluginRegistryBundleCheck</name>
+			<value>LOG</value>
+			<description>Defines what happens when plugin bundles are found and
+				are duplicated [EXCEPTION|LOG|NONE]
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.warehouse.dir</name>
+			<value>/user/hive/warehouse</value>
+			<description>location of default database for the warehouse
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.execute.setugi</name>
+			<value>false</value>
+			<description>In unsecure mode, setting this property to true will
+				cause the metastore to execute DFS operations using the client's
+				reported user and group permissions. Note that this property must be
+				set on both the client and server sides. Further note that its best
+				effort. If client sets its to true and server sets it to false,
+				client setting will be ignored.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.event.listeners</name>
+			<value></value>
+			<description>list of comma seperated listeners for metastore events.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.partition.inherit.table.properties</name>
+			<value></value>
+			<description>list of comma seperated keys occurring in table
+				properties which will get inherited to newly created partitions. *
+				implies all the keys will get inherited.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metadata.export.location</name>
+			<value></value>
+			<description>When used in conjunction with the
+				org.apache.hadoop.hive.ql.parse.MetaDataExportListener pre event
+				listener, it is the location to which the metadata will be exported.
+				The default is an empty string, which results in the metadata being
+				exported to the current user's home directory on HDFS.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metadata.move.exported.metadata.to.trash</name>
+			<value></value>
+			<description>When used in conjunction with the
+				org.apache.hadoop.hive.ql.parse.MetaDataExportListener pre event
+				listener, this setting determines if the metadata that is exported
+				will subsequently be moved to the user's trash directory alongside
+				the dropped table data. This ensures that the metadata will be
+				cleaned up along with the dropped table data.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.partition.name.whitelist.pattern</name>
+			<value></value>
+			<description>Partition names will be checked against this regex
+				pattern and rejected if not matched.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.end.function.listeners</name>
+			<value></value>
+			<description>list of comma separated listeners for the end of
+				metastore functions.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.event.expiry.duration</name>
+			<value>0</value>
+			<description>Duration after which events expire from events table (in
+				seconds)
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.event.clean.freq</name>
+			<value>0</value>
+			<description>Frequency at which timer task runs to purge expired
+				events in metastore(in seconds).
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.connect.retries</name>
+			<value>5</value>
+			<description>Number of retries while opening a connection to
+				metastore
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.failure.retries</name>
+			<value>3</value>
+			<description>Number of retries upon failure of Thrift metastore calls
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.client.connect.retry.delay</name>
+			<value>1</value>
+			<description>Number of seconds for the client to wait between
+				consecutive connection attempts
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.client.socket.timeout</name>
+			<value>20</value>
+			<description>MetaStore Client socket timeout in seconds</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.rawstore.impl</name>
+			<value>org.apache.hadoop.hive.metastore.ObjectStore</value>
+			<description>Name of the class that implements
+				org.apache.hadoop.hive.metastore.rawstore interface. This class is
+				used to store and retrieval of raw metadata objects such as table,
+				database
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.batch.retrieve.max</name>
+			<value>300</value>
+			<description>Maximum number of objects (tables/partitions) can be
+				retrieved from metastore in one batch. The higher the number, the
+				less the number of round trips is needed to the Hive metastore
+				server, but it may also cause higher memory requirement at the
+				client side.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.batch.retrieve.table.partition.max</name>
+			<value>1000</value>
+			<description>Maximum number of table partitions that metastore
+				internally retrieves in one batch.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.default.fileformat</name>
+			<value>TextFile</value>
+			<description>Default file format for CREATE TABLE statement. Options
+				are TextFile and SequenceFile. Users can explicitly say CREATE TABLE
+				... STORED AS &lt;TEXTFILE|SEQUENCEFILE&gt; to override
+			</description>
+		</property>
+
+		<property>
+			<name>hive.fileformat.check</name>
+			<value>true</value>
+			<description>Whether to check file format or not when loading data
+				files
+			</description>
+		</property>
+
+		<property>
+			<name>hive.map.aggr</name>
+			<value>true</value>
+			<description>Whether to use map-side aggregation in Hive Group By
+				queries
+			</description>
+		</property>
+
+		<property>
+			<name>hive.groupby.skewindata</name>
+			<value>false</value>
+			<description>Whether there is skew in data to optimize group by
+				queries
+			</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.multigroupby.common.distincts</name>
+			<value>true</value>
+			<description>Whether to optimize a multi-groupby query with the same
+				distinct.
+				Consider a query like:
+
+				from src
+				insert overwrite table dest1
+				select col1, count(distinct colx) group by
+				col1
+				insert overwrite table
+				dest2 select col2, count(distinct colx) group by
+				col2;
+
+				With this
+				parameter set to true, first we spray by the distinct value
+				(colx),
+				and then
+				perform the 2 groups bys. This makes sense if map-side
+				aggregation is
+				turned off. However,
+				with maps-side aggregation, it
+				might be useful in some cases to treat
+				the 2 inserts independently,
+				thereby performing the query above in 2MR jobs instead of 3 (due to
+				spraying by distinct key first).
+				If this parameter is turned off, we
+				dont consider the fact that the
+				distinct key is the same across
+				different MR jobs.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.groupby.mapaggr.checkinterval</name>
+			<value>100000</value>
+			<description>Number of rows after which size of the grouping
+				keys/aggregation classes is performed
+			</description>
+		</property>
+
+		<property>
+			<name>hive.mapred.local.mem</name>
+			<value>0</value>
+			<description>For local mode, memory of the mappers/reducers
+			</description>
+		</property>
+
+		<property>
+			<name>hive.mapjoin.followby.map.aggr.hash.percentmemory</name>
+			<value>0.3</value>
+			<description>Portion of total memory to be used by map-side grup
+				aggregation hash table, when this group by is followed by map join
+			</description>
+		</property>
+
+		<property>
+			<name>hive.map.aggr.hash.force.flush.memory.threshold</name>
+			<value>0.9</value>
+			<description>The max memory to be used by map-side grup aggregation
+				hash table, if the memory usage is higher than this number, force to
+				flush data
+			</description>
+		</property>
+
+		<property>
+			<name>hive.map.aggr.hash.percentmemory</name>
+			<value>0.5</value>
+			<description>Portion of total memory to be used by map-side grup
+				aggregation hash table
+			</description>
+		</property>
+
+		<property>
+			<name>hive.map.aggr.hash.min.reduction</name>
+			<value>0.5</value>
+			<description>Hash aggregation will be turned off if the ratio between
+				hash
+				table size and input rows is bigger than this number. Set to 1
+				to make
+				sure
+				hash aggregation is never turned off.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.cp</name>
+			<value>true</value>
+			<description>Whether to enable column pruner</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.index.filter</name>
+			<value>false</value>
+			<description>Whether to enable automatic use of indexes</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.index.groupby</name>
+			<value>false</value>
+			<description>Whether to enable optimization of group-by queries using
+				Aggregate indexes.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.ppd</name>
+			<value>true</value>
+			<description>Whether to enable predicate pushdown</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.ppd.storage</name>
+			<value>true</value>
+			<description>Whether to push predicates down into storage handlers.
+				Ignored when hive.optimize.ppd is false.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.ppd.recognizetransivity</name>
+			<value>true</value>
+			<description>Whether to transitively replicate predicate filters over
+				equijoin conditions.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.groupby</name>
+			<value>true</value>
+			<description>Whether to enable the bucketed group by from bucketed
+				partitions/tables.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.skewjoin.compiletime</name>
+			<value>false</value>
+			<description>Whether to create a separate plan for skewed keys for
+				the tables in the join.
+				This is based on the skewed keys stored in
+				the metadata. At compile
+				time, the plan is broken
+				into different
+				joins: one for the skewed keys, and the other for the
+				remaining keys.
+				And then,
+				a union is performed for the 2 joins generated above. So
+				unless the
+				same skewed key is present
+				in both the joined tables, the
+				join for the skewed key will be
+				performed as a map-side join.
+
+				The main
+				difference between this paramater and hive.optimize.skewjoin
+				is that
+				this parameter
+				uses the skew information stored in the metastore to
+				optimize the plan
+				at compile time itself.
+				If there is no skew
+				information in the metadata, this parameter will
+				not have any affect.
+				Both hive.optimize.skewjoin.compiletime and hive.optimize.skewjoin
+				should be set to true.
+				Ideally, hive.optimize.skewjoin should be
+				renamed as
+				hive.optimize.skewjoin.runtime, but not doing
+				so for
+				backward compatibility.
+
+				If the skew information is correctly stored
+				in the metadata,
+				hive.optimize.skewjoin.compiletime
+				would change the
+				query plan to take care of it, and
+				hive.optimize.skewjoin will be a
+				no-op.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.union.remove</name>
+			<value>false</value>
+			<description>
+				Whether to remove the union and push the operators
+				between union and the
+				filesink above
+				union. This avoids an extra scan
+				of the output by union. This is
+				independently useful for union
+				queries, and specially useful when
+				hive.optimize.skewjoin.compiletime is set
+				to true, since an
+				extra
+				union is inserted.
+
+				The merge is triggered if either of
+				hive.merge.mapfiles or
+				hive.merge.mapredfiles is set to true.
+				If the
+				user has set hive.merge.mapfiles to true and
+				hive.merge.mapredfiles
+				to false, the idea was the
+				number of reducers are few, so the number
+				of files anyway are small.
+				However, with this optimization,
+				we are
+				increasing the number of files possibly by a big margin. So, we
+				merge aggresively.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.mapred.supports.subdirectories</name>
+			<value>false</value>
+			<description>Whether the version of hadoop which is running supports
+				sub-directories for tables/partitions.
+				Many hive optimizations can be
+				applied if the hadoop version supports
+				sub-directories for
+				tables/partitions. It was added by MAPREDUCE-1501
+			</description>
+		</property>
+
+		<property>
+			<name>hive.multigroupby.singlemr</name>
+			<value>true</value>
+			<description>Whether to optimize multi group by query to generate
+				single M/R
+				job plan. If the multi group by query has common group by
+				keys, it will
+				be
+				optimized to generate single M/R job.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.map.groupby.sorted</name>
+			<value>false</value>
+			<description>If the bucketing/sorting properties of the table exactly
+				match the grouping key, whether to
+				perform the group by in the mapper
+				by using BucketizedHiveInputFormat. The
+				only downside to this
+				is that
+				it limits the number of mappers to the number of files.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.map.groupby.sorted.testmode</name>
+			<value>false</value>
+			<description>If the bucketing/sorting properties of the table exactly
+				match the grouping key, whether to
+				perform the group by in the mapper
+				by using BucketizedHiveInputFormat. If
+				the test mode is set, the plan
+				is not converted, but a query property is set to denote the same.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.new.job.grouping.set.cardinality</name>
+			<value>30</value>
+			<description>
+				Whether a new map-reduce job should be launched for
+				grouping
+				sets/rollups/cubes.
+				For a query like: select a, b, c,
+				count(1) from T group by a, b, c with
+				rollup;
+				4 rows are created per
+				row: (a, b, c), (a, b, null), (a, null, null),
+				(null, null, null).
+				This can lead to explosion across map-reduce boundary if the
+				cardinality
+				of T is very high,
+				and map-side aggregation does not do a
+				very good job.
+
+				This parameter decides if hive should add an
+				additional map-reduce job.
+				If the grouping set
+				cardinality (4 in the
+				example above), is more than this value, a new MR job is
+				added under
+				the
+				assumption that the orginal group by will reduce the data size.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.join.emit.interval</name>
+			<value>1000</value>
+			<description>How many rows in the right-most join operand Hive should
+				buffer before emitting the join result.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.join.cache.size</name>
+			<value>25000</value>
+			<description>How many rows in the joining tables (except the
+				streaming table) should be cached in memory.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.mapjoin.bucket.cache.size</name>
+			<value>100</value>
+			<description>How many values in each keys in the map-joined table
+				should be cached in memory.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.mapjoin.cache.numrows</name>
+			<value>25000</value>
+			<description>How many rows should be cached by jdbm for map join.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.skewjoin</name>
+			<value>false</value>
+			<description>Whether to enable skew join optimization.
+				The algorithm
+				is as follows: At runtime, detect the keys with a large
+				skew. Instead
+				of
+				processing those keys, store them temporarily in a hdfs directory.
+				In a
+				follow-up map-reduce
+				job, process those skewed keys. The same key
+				need not be skewed for all
+				the tables, and so,
+				the follow-up
+				map-reduce job (for the skewed keys) would be much
+				faster, since it
+				would be a
+				map-join.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.skewjoin.key</name>
+			<value>100000</value>
+			<description>Determine if we get a skew key in join. If we see more
+				than the specified number of rows with the same key in join
+				operator,
+				we think the key as a skew join key.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.skewjoin.mapjoin.map.tasks</name>
+			<value>10000</value>
+			<description> Determine the number of map task used in the follow up
+				map join job
+				for a skew join. It should be used together with
+				hive.skewjoin.mapjoin.min.split
+				to perform a fine grained control.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.skewjoin.mapjoin.min.split</name>
+			<value>33554432</value>
+			<description> Determine the number of map task at most used in the
+				follow up map join job
+				for a skew join by specifying the minimum
+				split size. It should be used
+				together with
+				hive.skewjoin.mapjoin.map.tasks to perform a fine grained control.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.mapred.mode</name>
+			<value>nonstrict</value>
+			<description>The mode in which the hive operations are being
+				performed.
+				In strict mode, some risky queries are not allowed to run.
+				They
+				include:
+				Cartesian Product.
+				No partition being picked up for a
+				query.
+				Comparing bigints and strings.
+				Comparing bigints and doubles.
+				Orderby without limit.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.enforce.bucketmapjoin</name>
+			<value>false</value>
+			<description>If the user asked for bucketed map-side join, and it
+				cannot be performed,
+				should the query fail or not ? For eg, if the
+				buckets in the tables being
+				joined are
+				not a multiple of each other,
+				bucketed map-side join cannot be
+				performed, and the
+				query will fail if
+				hive.enforce.bucketmapjoin is set to true.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.script.maxerrsize</name>
+			<value>100000</value>
+			<description>Maximum number of bytes a script is allowed to emit to
+				standard error (per map-reduce task). This prevents runaway scripts
+				from filling logs partitions to capacity
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.script.allow.partial.consumption</name>
+			<value>false</value>
+			<description> When enabled, this option allows a user script to exit
+				successfully without consuming all the data from the standard input.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.script.operator.id.env.var</name>
+			<value>HIVE_SCRIPT_OPERATOR_ID</value>
+			<description> Name of the environment variable that holds the unique
+				script operator ID in the user's transform function (the custom
+				mapper/reducer that the user has specified in the query)
+			</description>
+		</property>
+
+		<property>
+			<name>hive.script.operator.truncate.env</name>
+			<value>false</value>
+			<description>Truncate each environment variable for external script
+				in scripts operator to 20KB (to fit system limits)
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.compress.output</name>
+			<value>false</value>
+			<description> This controls whether the final outputs of a query (to
+				a local/hdfs file or a hive table) is compressed. The compression
+				codec and other options are determined from hadoop config variables
+				mapred.output.compress*
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.compress.intermediate</name>
+			<value>false</value>
+			<description> This controls whether intermediate files produced by
+				hive between multiple map-reduce jobs are compressed. The
+				compression codec and other options are determined from hadoop
+				config variables mapred.output.compress*
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.parallel</name>
+			<value>false</value>
+			<description>Whether to execute jobs in parallel</description>
+		</property>
+
+		<property>
+			<name>hive.exec.parallel.thread.number</name>
+			<value>8</value>
+			<description>How many jobs at most can be executed in parallel
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.rowoffset</name>
+			<value>false</value>
+			<description>Whether to provide the row offset virtual column
+			</description>
+		</property>
+
+		<property>
+			<name>hive.task.progress</name>
+			<value>false</value>
+			<description>Whether Hive should periodically update task progress
+				counters during execution. Enabling this allows task progress to be
+				monitored more closely in the job tracker, but may impose a
+				performance penalty. This flag is automatically set to true for jobs
+				with hive.exec.dynamic.partition set to true.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.hwi.war.file</name>
+			<value>lib/hive-hwi-@VERSION@.war</value>
+			<description>This sets the path to the HWI war file, relative to
+				${HIVE_HOME}.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.hwi.listen.host</name>
+			<value>0.0.0.0</value>
+			<description>This is the host address the Hive Web Interface will
+				listen on
+			</description>
+		</property>
+
+		<property>
+			<name>hive.hwi.listen.port</name>
+			<value>9999</value>
+			<description>This is the port the Hive Web Interface will listen on
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.pre.hooks</name>
+			<value></value>
+			<description>Comma-separated list of pre-execution hooks to be
+				invoked for each statement. A pre-execution hook is specified as the
+				name of a Java class which implements the
+				org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.post.hooks</name>
+			<value></value>
+			<description>Comma-separated list of post-execution hooks to be
+				invoked for each statement. A post-execution hook is specified as
+				the name of a Java class which implements the
+				org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.failure.hooks</name>
+			<value></value>
+			<description>Comma-separated list of on-failure hooks to be invoked
+				for each statement. An on-failure hook is specified as the name of
+				Java class which implements the
+				org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.init.hooks</name>
+			<value></value>
+			<description>A comma separated list of hooks to be invoked at the
+				beginning of HMSHandler initialization. Aninit hook is specified as
+				the name of Java class which extends
+				org.apache.hadoop.hive.metastore.MetaStoreInitListener.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.client.stats.publishers</name>
+			<value></value>
+			<description>Comma-separated list of statistics publishers to be
+				invoked on counters on each job. A client stats publisher is
+				specified as the name of a Java class which implements the
+				org.apache.hadoop.hive.ql.stats.ClientStatsPublisher interface.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.client.stats.counters</name>
+			<value></value>
+			<description>Subset of counters that should be of interest for
+				hive.client.stats.publishers (when one wants to limit their
+				publishing). Non-display names should be used
+			</description>
+		</property>
+
+		<property>
+			<name>hive.merge.mapfiles</name>
+			<value>true</value>
+			<description>Merge small files at the end of a map-only job
+			</description>
+		</property>
+
+		<property>
+			<name>hive.merge.mapredfiles</name>
+			<value>false</value>
+			<description>Merge small files at the end of a map-reduce job
+			</description>
+		</property>
+
+		<property>
+			<name>hive.heartbeat.interval</name>
+			<value>1000</value>
+			<description>Send a heartbeat after this interval - used by mapjoin
+				and filter operators
+			</description>
+		</property>
+
+		<property>
+			<name>hive.merge.size.per.task</name>
+			<value>256000000</value>
+			<description>Size of merged files at the end of the job</description>
+		</property>
+
+		<property>
+			<name>hive.merge.smallfiles.avgsize</name>
+			<value>16000000</value>
+			<description>When the average output file size of a job is less than
+				this number, Hive will start an additional map-reduce job to merge
+				the output files into bigger files. This is only done for map-only
+				jobs if hive.merge.mapfiles is true, and for map-reduce jobs if
+				hive.merge.mapredfiles is true.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.mapjoin.smalltable.filesize</name>
+			<value>25000000</value>
+			<description>The threshold for the input file size of the small
+				tables; if the file size is smaller than this threshold, it will try
+				to convert the common join into map join
+			</description>
+		</property>
+
+		<property>
+			<name>hive.ignore.mapjoin.hint</name>
+			<value>true</value>
+			<description>Ignore the mapjoin hint</description>
+		</property>
+
+		<property>
+			<name>hive.mapjoin.localtask.max.memory.usage</name>
+			<value>0.90</value>
+			<description>This number means how much memory the local task can
+				take to hold the key/value into in-memory hash table; If the local
+				task's memory usage is more than this number, the local task will be
+				abort by themself. It means the data of small table is too large to
+				be hold in the memory.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.mapjoin.followby.gby.localtask.max.memory.usage</name>
+			<value>0.55</value>
+			<description>This number means how much memory the local task can
+				take to hold the key/value into in-memory hash table when this map
+				join followed by a group by; If the local task's memory usage is
+				more than this number, the local task will be abort by themself. It
+				means the data of small table is too large to be hold in the memory.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.mapjoin.check.memory.rows</name>
+			<value>100000</value>
+			<description>The number means after how many rows processed it needs
+				to check the memory usage
+			</description>
+		</property>
+
+		<property>
+			<name>hive.auto.convert.join</name>
+			<value>false</value>
+			<description>Whether Hive enable the optimization about converting
+				common join into mapjoin based on the input file size
+			</description>
+		</property>
+
+		<property>
+			<name>hive.auto.convert.join.noconditionaltask</name>
+			<value>true</value>
+			<description>Whether Hive enable the optimization about converting
+				common join into mapjoin based on the input file
+				size. If this
+				paramater is on, and the sum of size for n-1 of the
+				tables/partitions for a n-way join is smaller than the
+				specified
+				size, the join is directly converted to a mapjoin (there is no
+				conditional task).
+			</description>
+		</property>
+
+		<property>
+			<name>hive.auto.convert.join.noconditionaltask.size</name>
+			<value>10000000</value>
+			<description>If hive.auto.convert.join.noconditionaltask is off, this
+				parameter does not take affect. However, if it
+				is on, and the sum of
+				size for n-1 of the tables/partitions for a
+				n-way join is smaller
+				than this size, the join is directly
+				converted to a mapjoin(there is
+				no conditional task). The default is 10MB
+			</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.mapjoin.mapreduce</name>
+			<value>false</value>
+			<description>If hive.auto.convert.join is off, this parameter does
+				not take
+				affect. If it is on, and if there are map-join jobs followed
+				by a
+				map-reduce
+				job (for e.g a group by), each map-only job is merged
+				with the
+				following
+				map-reduce job.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.script.auto.progress</name>
+			<value>false</value>
+			<description>Whether Hive Tranform/Map/Reduce Clause should
+				automatically send progress information to TaskTracker to avoid the
+				task getting killed because of inactivity. Hive sends progress
+				information when the script is outputting to stderr. This option
+				removes the need of periodically producing stderr messages, but
+				users should be cautious because this may prevent infinite loops in
+				the scripts to be killed by TaskTracker.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.script.serde</name>
+			<value>org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe</value>
+			<description>The default serde for trasmitting input data to and
+				reading output data from the user scripts.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.binary.record.max.length</name>
+			<value>1000</value>
+			<description>Read from a binary stream and treat each
+				hive.binary.record.max.length bytes as a record.
+				The last record
+				before the end of stream can have less than
+				hive.binary.record.max.length bytes
+			</description>
+		</property>
+
+
+		<property>
+			<name>hive.script.recordreader</name>
+			<value>org.apache.hadoop.hive.ql.exec.TextRecordReader</value>
+			<description>The default record reader for reading data from the user
+				scripts.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.script.recordwriter</name>
+			<value>org.apache.hadoop.hive.ql.exec.TextRecordWriter</value>
+			<description>The default record writer for writing data to the user
+				scripts.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.input.format</name>
+			<value>org.apache.hadoop.hive.ql.io.CombineHiveInputFormat</value>
+			<description>The default input format. Set this to HiveInputFormat if
+				you encounter problems with CombineHiveInputFormat.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.udtf.auto.progress</name>
+			<value>false</value>
+			<description>Whether Hive should automatically send progress
+				information to TaskTracker when using UDTF's to prevent the task
+				getting killed because of inactivity. Users should be cautious
+				because this may prevent TaskTracker from killing tasks with infinte
+				loops.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.mapred.reduce.tasks.speculative.execution</name>
+			<value>true</value>
+			<description>Whether speculative execution for reducers should be
+				turned on.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.counters.pull.interval</name>
+			<value>1000</value>
+			<description>The interval with which to poll the JobTracker for the
+				counters the running job. The smaller it is the more load there will
+				be on the jobtracker, the higher it is the less granular the caught
+				will be.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.querylog.location</name>
+			<value>/tmp/${user.name}</value>
+			<description>
+				Location of Hive run time structured log file
+			</description>
+		</property>
+
+		<property>
+			<name>hive.querylog.enable.plan.progress</name>
+			<value>true</value>
+			<description>
+				Whether to log the plan's progress every time a job's
+				progress is checked.
+				These logs are written to the location specified
+				by
+				hive.querylog.location
+			</description>
+		</property>
+
+		<property>
+			<name>hive.querylog.plan.progress.interval</name>
+			<value>60000</value>
+			<description>
+				The interval to wait between logging the plan's progress
+				in
+				milliseconds.
+				If there is a whole number percentage change in the
+				progress of the
+				mappers or the reducers,
+				the progress is logged
+				regardless of this value.
+				The actual interval will be the ceiling of
+				(this value divided by the
+				value of
+				hive.exec.counters.pull.interval)
+				multiplied by the value of hive.exec.counters.pull.interval
+				I.e. if
+				it is not divide evenly by the value of
+				hive.exec.counters.pull.interval it will be
+				logged less frequently
+				than specified.
+				This only has an effect if
+				hive.querylog.enable.plan.progress is set to
+				true.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.enforce.bucketing</name>
+			<value>false</value>
+			<description>Whether bucketing is enforced. If true, while inserting
+				into the table, bucketing is enforced.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.enforce.sorting</name>
+			<value>false</value>
+			<description>Whether sorting is enforced. If true, while inserting
+				into the table, sorting is enforced.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.bucketingsorting</name>
+			<value>true</value>
+			<description>If hive.enforce.bucketing or hive.enforce.sorting is
+				true, dont create a reducer for enforcing
+				bucketing/sorting for
+				queries of the form:
+				insert overwrite table T2 select * from T1;
+				where T1 and T2 are bucketed/sorted by the same keys into the same
+				number
+				of buckets.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.enforce.sortmergebucketmapjoin</name>
+			<value>false</value>
+			<description>If the user asked for sort-merge bucketed map-side join,
+				and it cannot be performed,
+				should the query fail or not ?
+			</description>
+		</property>
+
+		<property>
+			<name>hive.auto.convert.sortmerge.join</name>
+			<value>false</value>
+			<description>Will the join be automatically converted to a sort-merge
+				join, if the joined tables pass
+				the criteria for sort-merge join.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.auto.convert.sortmerge.join.bigtable.selection.policy
+			</name>
+			<value>org.apache.hadoop.hive.ql.optimizer.AvgPartitionSizeBasedBigTableSelectorForAutoSMJ
+			</value>
+			<description>The policy to choose the big table for automatic
+				conversion to sort-merge join.
+				By default, the table with the largest
+				partitions is assigned the big
+				table. All policies are:
+				. based on
+				position of the table - the leftmost table is selected
+				org.apache.hadoop.hive.ql.optimizer.LeftmostBigTableSMJ.
+				. based on
+				total size (all the partitions selected in the query) of
+				the table
+				org.apache.hadoop.hive.ql.optimizer.TableSizeBasedBigTableSelectorForAutoSMJ.
+				. based on average size (all the partitions selected in the query)
+				of the table
+				org.apache.hadoop.hive.ql.optimizer.AvgPartitionSizeBasedBigTableSelectorForAutoSMJ.
+				New policies can be added in future.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.ds.connection.url.hook</name>
+			<value></value>
+			<description>Name of the hook to use for retriving the JDO connection
+				URL. If empty, the value in javax.jdo.option.ConnectionURL is used
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.ds.retry.attempts</name>
+			<value>1</value>
+			<description>The number of times to retry a metastore call if there
+				were a connection error
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.ds.retry.interval</name>
+			<value>1000</value>
+			<description>The number of miliseconds between metastore retry
+				attempts
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.server.min.threads</name>
+			<value>200</value>
+			<description>Minimum number of worker threads in the Thrift server's
+				pool.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.server.max.threads</name>
+			<value>100000</value>
+			<description>Maximum number of worker threads in the Thrift server's
+				pool.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.server.tcp.keepalive</name>
+			<value>true</value>
+			<description>Whether to enable TCP keepalive for the metastore
+				server. Keepalive will prevent accumulation of half-open
+				connections.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.sasl.enabled</name>
+			<value>false</value>
+			<description>If true, the metastore thrift interface will be secured
+				with SASL. Clients must authenticate with Kerberos.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.thrift.framed.transport.enabled</name>
+			<value>false</value>
+			<description>If true, the metastore thrift interface will use
+				TFramedTransport. When false (default) a standard TTransport is
+				used.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.kerberos.keytab.file</name>
+			<value></value>
+			<description>The path to the Kerberos Keytab file containing the
+				metastore thrift server's service principal.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.kerberos.principal</name>
+			<value>hive-metastore/_HOST@EXAMPLE.COM</value>
+			<description>The service principal for the metastore thrift server.
+				The special string _HOST will be replaced automatically with the
+				correct host name.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.cluster.delegation.token.store.class</name>
+			<value>org.apache.hadoop.hive.thrift.MemoryTokenStore</value>
+			<description>The delegation token store implementation. Set to
+				org.apache.hadoop.hive.thrift.ZooKeeperTokenStore for load-balanced
+				cluster.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.cluster.delegation.token.store.zookeeper.connectString
+			</name>
+			<value>localhost:2181</value>
+			<description>The ZooKeeper token store connect string.</description>
+		</property>
+
+		<property>
+			<name>hive.cluster.delegation.token.store.zookeeper.znode</name>
+			<value>/hive/cluster/delegation</value>
+			<description>The root path for token store data.</description>
+		</property>
+
+		<property>
+			<name>hive.cluster.delegation.token.store.zookeeper.acl</name>
+			<value>sasl:hive/host1@EXAMPLE.COM:cdrwa,sasl:hive/host2@EXAMPLE.COM:cdrwa
+			</value>
+			<description>ACL for token store entries. List comma separated all
+				server principals for the cluster.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.cache.pinobjtypes</name>
+			<value>Table,StorageDescriptor,SerDeInfo,Partition,Database,Type,FieldSchema,Order
+			</value>
+			<description>List of comma separated metastore object types that
+				should be pinned in the cache
+			</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.reducededuplication</name>
+			<value>true</value>
+			<description>Remove extra map-reduce jobs if the data is already
+				clustered by the same key which needs to be used again. This should
+				always be set to true. Since it is a new feature, it has been made
+				configurable.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.reducededuplication.min.reducer</name>
+			<value>4</value>
+			<description>Reduce deduplication merges two RSs by moving
+				key/parts/reducer-num of the child RS to parent RS.
+				That means if
+				reducer-num of the child RS is fixed (order by or forced
+				bucketing)
+				and small, it can make very slow, single MR.
+				The optimization will be
+				disabled if number of reducers is less than
+				specified value.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.dynamic.partition</name>
+			<value>true</value>
+			<description>Whether or not to allow dynamic partitions in DML/DDL.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.dynamic.partition.mode</name>
+			<value>strict</value>
+			<description>In strict mode, the user must specify at least one
+				static partition in case the user accidentally overwrites all
+				partitions.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.max.dynamic.partitions</name>
+			<value>1000</value>
+			<description>Maximum number of dynamic partitions allowed to be
+				created in total.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.max.dynamic.partitions.pernode</name>
+			<value>100</value>
+			<description>Maximum number of dynamic partitions allowed to be
+				created in each mapper/reducer node.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.max.created.files</name>
+			<value>100000</value>
+			<description>Maximum number of HDFS files created by all
+				mappers/reducers in a MapReduce job.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.default.partition.name</name>
+			<value>__HIVE_DEFAULT_PARTITION__</value>
+			<description>The default partition name in case the dynamic partition
+				column value is null/empty string or anyother values that cannot be
+				escaped. This value must not contain any special character used in
+				HDFS URI (e.g., ':', '%', '/' etc). The user has to be aware that
+				the dynamic partition value should not contain this value to avoid
+				confusions.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.stats.dbclass</name>
+			<value>jdbc:derby</value>
+			<description>The default database that stores temporary hive
+				statistics.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.stats.autogather</name>
+			<value>true</value>
+			<description>A flag to gather statistics automatically during the
+				INSERT OVERWRITE command.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.stats.jdbcdriver</name>
+			<value>org.apache.derby.jdbc.EmbeddedDriver</value>
+			<description>The JDBC driver for the database that stores temporary
+				hive statistics.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.stats.dbconnectionstring</name>
+			<value>jdbc:derby:;databaseName=TempStatsStore;create=true</value>
+			<description>The default connection string for the database that
+				stores temporary hive statistics.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.stats.default.publisher</name>
+			<value></value>
+			<description>The Java class (implementing the StatsPublisher
+				interface) that is used by default if hive.stats.dbclass is not JDBC
+				or HBase.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.stats.default.aggregator</name>
+			<value></value>
+			<description>The Java class (implementing the StatsAggregator
+				interface) that is used by default if hive.stats.dbclass is not JDBC
+				or HBase.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.stats.jdbc.timeout</name>
+			<value>30</value>
+			<description>Timeout value (number of seconds) used by JDBC
+				connection and statements.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.stats.retries.max</name>
+			<value>0</value>
+			<description>Maximum number of retries when stats
+				publisher/aggregator got an exception updating intermediate
+				database. Default is no tries on failures.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.stats.retries.wait</name>
+			<value>3000</value>
+			<description>The base waiting window (in milliseconds) before the
+				next retry. The actual wait time is calculated by baseWindow *
+				failues baseWindow * (failure 1) * (random number between
+				[0.0,1.0]).
+			</description>
+		</property>
+
+		<property>
+			<name>hive.stats.reliable</name>
+			<value>false</value>
+			<description>Whether queries will fail because stats cannot be
+				collected completely accurately.
+				If this is set to true,
+				reading/writing from/into a partition may fail
+				becuase the stats
+				could not be computed accurately.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.stats.collect.tablekeys</name>
+			<value>false</value>
+			<description>Whether join and group by keys on tables are derived and
+				maintained in the QueryPlan.
+				This is useful to identify how tables
+				are accessed and to determine if
+				they should be bucketed.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.stats.collect.scancols</name>
+			<value>false</value>
+			<description>Whether column accesses are tracked in the QueryPlan.
+				This is useful to identify how tables are accessed and to determine
+				if there are wasted columns that can be trimmed.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.stats.ndv.error</name>
+			<value>20.0</value>
+			<description>Standard error expressed in percentage. Provides a
+				tradeoff between accuracy and compute cost.A lower value for error
+				indicates higher accuracy and a higher compute cost.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.stats.key.prefix.max.length</name>
+			<value>200</value>
+			<description>
+				Determines if when the prefix of the key used for
+				intermediate stats
+				collection
+				exceeds a certain length, a hash of the
+				key is used instead. If the value
+				&lt; 0 then hashing
+				is never used,
+				if the value >= 0 then hashing is used only when the
+				key prefixes
+				length
+				exceeds that value. The key prefix is defined as everything
+				preceding the
+				task ID in the key.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.support.concurrency</name>
+			<value>false</value>
+			<description>Whether hive supports concurrency or not. A zookeeper
+				instance must be up and running for the default hive lock manager to
+				support read-write locks.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.lock.numretries</name>
+			<value>100</value>
+			<description>The number of times you want to try to get all the locks
+			</description>
+		</property>
+
+		<property>
+			<name>hive.unlock.numretries</name>
+			<value>10</value>
+			<description>The number of times you want to retry to do one unlock
+			</description>
+		</property>
+
+		<property>
+			<name>hive.lock.sleep.between.retries</name>
+			<value>60</value>
+			<description>The sleep time (in seconds) between various retries
+			</description>
+		</property>
+
+		<property>
+			<name>hive.zookeeper.quorum</name>
+			<value></value>
+			<description>The list of zookeeper servers to talk to. This is only
+				needed for read/write locks.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.zookeeper.client.port</name>
+			<value>2181</value>
+			<description>The port of zookeeper servers to talk to. This is only
+				needed for read/write locks.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.zookeeper.session.timeout</name>
+			<value>600000</value>
+			<description>Zookeeper client's session timeout. The client is
+				disconnected, and as a result, all locks released, if a heartbeat is
+				not sent in the timeout.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.zookeeper.namespace</name>
+			<value>hive_zookeeper_namespace</value>
+			<description>The parent node under which all zookeeper nodes are
+				created.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.zookeeper.clean.extra.nodes</name>
+			<value>false</value>
+			<description>Clean extra nodes at the end of the session.
+			</description>
+		</property>
+
+		<property>
+			<name>fs.har.impl</name>
+			<value>org.apache.hadoop.hive.shims.HiveHarFileSystem</value>
+			<description>The implementation for accessing Hadoop Archives. Note
+				that this won't be applicable to Hadoop vers less than 0.20
+			</description>
+		</property>
+
+		<property>
+			<name>hive.archive.enabled</name>
+			<value>false</value>
+			<description>Whether archiving operations are permitted</description>
+		</property>
+
+		<property>
+			<name>hive.fetch.output.serde</name>
+			<value>org.apache.hadoop.hive.serde2.DelimitedJSONSerDe</value>
+			<description>The serde used by FetchTask to serialize the fetch
+				output.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.mode.local.auto</name>
+			<value>false</value>
+			<description> Let hive determine whether to run in local mode
+				automatically
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.drop.ignorenonexistent</name>
+			<value>true</value>
+			<description>
+				Do not report an error if DROP TABLE/VIEW specifies a
+				non-existent
+				table/view
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.show.job.failure.debug.info</name>
+			<value>true</value>
+			<description>
+				If a job fails, whether to provide a link in the CLI to
+				the task with
+				the
+				most failures, along with debugging hints if
+				applicable.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.auto.progress.timeout</name>
+			<value>0</value>
+			<description>
+				How long to run autoprogressor for the script/UDTF
+				operators (in
+				seconds).
+				Set to 0 for forever.
+			</description>
+		</property>
+
+		<!-- HBase Storage Handler Parameters -->
+
+		<property>
+			<name>hive.hbase.wal.enabled</name>
+			<value>true</value>
+			<description>Whether writes to HBase should be forced to the
+				write-ahead log. Disabling this improves HBase write performance at
+				the risk of lost writes in case of a crash.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.table.parameters.default</name>
+			<value></value>
+			<description>Default property values for newly created tables
+			</description>
+		</property>
+
+		<property>
+			<name>hive.entity.separator</name>
+			<value>@</value>
+			<description>Separator used to construct names of tables and
+				partitions. For example, dbname@tablename@partitionname
+			</description>
+		</property>
+
+		<property>
+			<name>hive.ddl.createtablelike.properties.whitelist</name>
+			<value></value>
+			<description>Table Properties to copy over when executing a Create
+				Table Like.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.variable.substitute</name>
+			<value>true</value>
+			<description>This enables substitution using syntax like ${var}
+				${system:var} and ${env:var}.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.variable.substitute.depth</name>
+			<value>40</value>
+			<description>The maximum replacements the substitution engine will
+				do.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.conf.validation</name>
+			<value>true</value>
+			<description>Eables type checking for registered hive configurations
+			</description>
+		</property>
+
+		<property>
+			<name>hive.security.authorization.enabled</name>
+			<value>false</value>
+			<description>enable or disable the hive client authorization
+			</description>
+		</property>
+
+		<property>
+			<name>hive.security.authorization.createtable.user.grants</name>
+			<value></value>
+			<description>the privileges automatically granted to some users
+				whenever a table gets created.
+				An example like
+				"userX,userY:select;userZ:create" will grant select
+				privilege to
+				userX and userY,
+				and grant create privilege to userZ whenever a new
+				table created.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.security.authorization.createtable.group.grants</name>
+			<value></value>
+			<description>the privileges automatically granted to some groups
+				whenever a table gets created.
+				An example like
+				"groupX,groupY:select;groupZ:create" will grant select
+				privilege to
+				groupX and groupY,
+				and grant create privilege to groupZ whenever a
+				new table created.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.security.authorization.createtable.role.grants</name>
+			<value></value>
+			<description>the privileges automatically granted to some roles
+				whenever a table gets created.
+				An example like
+				"roleX,roleY:select;roleZ:create" will grant select
+				privilege to
+				roleX and roleY,
+				and grant create privilege to roleZ whenever a new
+				table created.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.security.authorization.createtable.owner.grants</name>
+			<value></value>
+			<description>the privileges automatically granted to the owner
+				whenever a table gets created.
+				An example like "select,drop" will
+				grant select and drop privilege to
+				the owner of the table
+			</description>
+		</property>
+
+		<property>
+			<name>hive.metastore.authorization.storage.checks</name>
+			<value>false</value>
+			<description>Should the metastore do authorization checks against the
+				underlying storage
+				for operations like drop-partition (disallow the
+				drop-partition if the
+				user in
+				question doesn't have permissions to
+				delete the corresponding directory
+				on the storage).
+			</description>
+		</property>
+
+		<property>
+			<name>hive.error.on.empty.partition</name>
+			<value>false</value>
+			<description>Whether to throw an excpetion if dynamic partition
+				insert generates empty results.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.index.compact.file.ignore.hdfs</name>
+			<value>false</value>
+			<description>True the hdfs location stored in the index file will be
+				igbored at runtime.
+				If the data got moved or the name of the cluster
+				got changed, the
+				index data should still be usable.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.index.filter.compact.minsize</name>
+			<value>5368709120</value>
+			<description>Minimum size (in bytes) of the inputs on which a compact
+				index is automatically used.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.optimize.index.filter.compact.maxsize</name>
+			<value>-1</value>
+			<description>Maximum size (in bytes) of the inputs on which a compact
+				index is automatically used.
+				A negative number is equivalent to
+				infinity.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.index.compact.query.max.size</name>
+			<value>10737418240</value>
+			<description>The maximum number of bytes that a query using the
+				compact index can read. Negative value is equivalent to infinity.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.index.compact.query.max.entries</name>
+			<value>10000000</value>
+			<description>The maximum number of index entries to read during a
+				query that uses the compact index. Negative value is equivalent to
+				infinity.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.index.compact.binary.search</name>
+			<value>true</value>
+			<description>Whether or not to use a binary search to find the
+				entries in an index table that match the filter, where possible
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exim.uri.scheme.whitelist</name>
+			<value>hdfs,pfile</value>
+			<description>A comma separated list of acceptable URI schemes for
+				import and export.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.lock.mapred.only.operation</name>
+			<value>false</value>
+			<description>This param is to control whether or not only do lock on
+				queries
+				that need to execute at least one mapred job.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.limit.row.max.size</name>
+			<value>100000</value>
+			<description>When trying a smaller subset of data for simple LIMIT,
+				how much size we need to guarantee
+				each row to have at least.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.limit.optimize.limit.file</name>
+			<value>10</value>
+			<description>When trying a smaller subset of data for simple LIMIT,
+				maximum number of files we can
+				sample.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.limit.optimize.enable</name>
+			<value>false</value>
+			<description>Whether to enable to optimization to trying a smaller
+				subset of data for simple LIMIT first.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.limit.optimize.fetch.max</name>
+			<value>50000</value>
+			<description>Maximum number of rows allowed for a smaller subset of
+				data for simple LIMIT, if it is a fetch query.
+				Insert queries are not
+				restricted by this limit.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.rework.mapredwork</name>
+			<value>false</value>
+			<description>should rework the mapred work or not.
+				This is first
+				introduced by SymlinkTextInputFormat to replace symlink
+				files with
+				real paths at compile time.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.concatenate.check.index</name>
+			<value>true</value>
+			<description>If this sets to true, hive will throw error when doing
+				'alter table tbl_name [partSpec] concatenate' on a table/partition
+				that has indexes on it. The reason the user want to set this to true
+				is because it can help user to avoid handling all index drop,
+				recreation,
+				rebuild work. This is very helpful for tables with
+				thousands of partitions.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.sample.seednumber</name>
+			<value>0</value>
+			<description>A number used to percentage sampling. By changing this
+				number, user will change the subsets
+				of data sampled.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.io.exception.handlers</name>
+			<value></value>
+			<description>A list of io exception handler class names. This is used
+				to construct a list exception handlers to handle exceptions thrown
+				by record readers
+			</description>
+		</property>
+
+		<property>
+			<name>hive.autogen.columnalias.prefix.label</name>
+			<value>_c</value>
+			<description>String used as a prefix when auto generating column
+				alias.
+				By default the prefix label will be appended with a column
+				position
+				number to form the column alias. Auto generation would
+				happen if an
+				aggregate function is used in a select clause without an
+				explicit
+				alias.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.autogen.columnalias.prefix.includefuncname</name>
+			<value>false</value>
+			<description>Whether to include function name in the column alias
+				auto generated by hive.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.perf.logger</name>
+			<value>org.apache.hadoop.hive.ql.log.PerfLogger</value>
+			<description>The class responsible logging client side performance
+				metrics. Must be a subclass of
+				org.apache.hadoop.hive.ql.log.PerfLogger
+			</description>
+		</property>
+
+		<property>
+			<name>hive.start.cleanup.scratchdir</name>
+			<value>false</value>
+			<description>To cleanup the hive scratchdir while starting the hive
+				server
+			</description>
+		</property>
+
+		<property>
+			<name>hive.output.file.extension</name>
+			<value></value>
+			<description>String used as a file extension for output files. If not
+				set, defaults to the codec extension for text files (e.g. ".gz"), or
+				no extension otherwise.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.insert.into.multilevel.dirs</name>
+			<value>false</value>
+			<description>Where to insert into multilevel directories like
+				"insert
+				directory '/HIVEFT25686/chinna/' from table"
+			</description>
+		</property>
+
+		<property>
+			<name>hive.warehouse.subdir.inherit.perms</name>
+			<value>false</value>
+			<description>Set this to true if the the table directories should
+				inherit the
+				permission of the warehouse or database directory instead
+				of being created
+				with the permissions derived from dfs umask
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.job.debug.capture.stacktraces</name>
+			<value>true</value>
+			<description>Whether or not stack traces parsed from the task logs of
+				a sampled failed task for
+				each failed job should be stored in the
+				SessionState
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.driver.run.hooks</name>
+			<value></value>
+			<description>A comma separated list of hooks which implement
+				HiveDriverRunHook and will be run at the
+				beginning and end of
+				Driver.run, these will be run in the order specified
+			</description>
+		</property>
+
+		<property>
+			<name>hive.ddl.output.format</name>
+			<value>text</value>
+			<description>
+				The data format to use for DDL output. One of "text"
+				(for human
+				readable text) or "json" (for a json object).
+			</description>
+		</property>
+
+		<property>
+			<name>hive.transform.escape.input</name>
+			<value>false</value>
+			<description>
+				This adds an option to escape special chars (newlines,
+				carriage returns
+				and
+				tabs) when they are passed to the user script.
+				This is useful if the hive
+				tables
+				can contain data that contains
+				special characters.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.rcfile.use.explicit.header</name>
+			<value>true</value>
+			<description>
+				If this is set the header for RC Files will simply be
+				RCF. If this is
+				not
+				set the header will be that borrowed from sequence
+				files, e.g. SEQ-
+				followed
+				by the input and output RC File formats.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.multi.insert.move.tasks.share.dependencies</name>
+			<value>false</value>
+			<description>
+				If this is set all move tasks for tables/partitions (not
+				directories)
+				at the end of a
+				multi-insert query will only begin once
+				the dependencies for all these move
+				tasks have been
+				met.
+				Advantages: If
+				concurrency is enabled, the locks will only be released once the
+				query has
+				finished, so with this config enabled, the time when the
+				table/partition is
+				generated will be much closer to when the lock on
+				it is released.
+				Disadvantages: If concurrency is not enabled, with
+				this disabled,
+				the tables/partitions which
+				are produced by this query
+				and finish earlier will be available for
+				querying
+				much earlier. Since
+				the locks are only released once the query finishes,
+				this
+				does not
+				apply if concurrency is enabled.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.fetch.task.conversion</name>
+			<value>minimal</value>
+			<description>
+				Some select queries can be converted to single FETCH
+				task minimizing
+				latency.
+				Currently the query should be single sourced
+				not having any subquery and
+				should not have
+				any aggregations or
+				distincts (which incurrs RS), lateral views and
+				joins.
+				1. minimal :
+				SELECT STAR, FILTER on partition columns, LIMIT only
+				2. more :
+				SELECT, FILTER, LIMIT only (TABLESAMPLE, virtual columns)
+			</description>
+		</property>
+
+		<property>
+			<name>hive.hmshandler.retry.attempts</name>
+			<value>1</value>
+			<description>The number of times to retry a HMSHandler call if there
+				were a connection error
+			</description>
+		</property>
+
+		<property>
+			<name>hive.hmshandler.retry.interval</name>
+			<value>1000</value>
+			<description>The number of miliseconds between HMSHandler retry
+				attempts
+			</description>
+		</property>
+
+		<property>
+			<name>hive.server.read.socket.timeout</name>
+			<value>10</value>
+			<description>Timeout for the HiveServer to close the connection if no
+				response from the client in N seconds, defaults to 10 seconds.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.server.tcp.keepalive</name>
+			<value>true</value>
+			<description>Whether to enable TCP keepalive for the Hive server.
+				Keepalive will prevent accumulation of half-open connections.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.decode.partition.name</name>
+			<value>false</value>
+			<description>Whether to show the unquoted partition names in query
+				results.
+			</description>
+		</property>
+
+		<property>
+			<name>hive.log4j.file</name>
+			<value></value>
+			<description>Hive log4j configuration file.
+				If the property is not
+				set, then logging will be initialized using
+				hive-log4j.properties
+				found on the classpath.
+				If the property is set, the value must be a
+				valid URI (java.net.URI,
+				e.g. "file:///tmp/my-logging.properties"),
+				which you can then
+				extract a URL from and pass to
+				PropertyConfigurator.configure(URL).
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.log4j.file</name>
+			<value></value>
+			<description>Hive log4j configuration file for execution mode(sub
+				command).
+				If the property is not set, then logging will be
+				initialized using
+				hive-exec-log4j.properties found on the classpath.
+				If the property is set, the value must be a valid URI (java.net.URI,
+				e.g. "file:///tmp/my-logging.properties"), which you can then
+				extract a URL from and pass to PropertyConfigurator.configure(URL).
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.infer.bucket.sort</name>
+			<value>false</value>
+			<description>
+				If this is set, when writing partitions, the metadata
+				will include the
+				bucketing/sorting
+				properties with which the data was
+				written if any (this will not overwrite the
+				metadata
+				inherited from
+				the table if the table is bucketed/sorted)
+			</description>
+		</property>
+
+		<property>
+			<name>hive.exec.infer.bucket.sort.num.buckets.power.two</name>
+			<value>false</value>
+			<description>
+				If this is set, when setting the number of reducers for
+				the map reduce
+				task which writes the
+				final output files, it will
+				choose a number which is a power of two,
+				unless the user specifies
+				the number of reducers to use using mapred.reduce.tasks. The number
+				of
+				reducers
+				may be set to a power of two, only to be followed by a
+				merge task
+				meaning preventing
+				anything from being inferred.
+				With
+				hive.exec.infer.bucket.sort set to true:
+				Advantages: If this is not
+				set, the number of buckets for partitions will seem
+				arbitrary,
+				which
+				means that the number of mappers used for optimized joins, for
+				example, will
+				be very low. With this set, since the number of buckets
+				used for any
+				partition is
+				a power of two, the number of mappers used
+				for optimized joins will
+				be the least
+				number of buckets used by any
+				partition being joined.
+				Disadvantages: This may mean a much larger or
+				much smaller number of reducers
+				being used in the
+				final map reduce
+				job, e.g. if a job was originally going to take 257
+				reducers,
+				it will
+				now take 512 reducers, similarly if the max number of reducers
+				is
+				511,
+				and a job was going to use this many, it will now use 256
+				reducers.
+
+			</description>
+		</property>
+
+		<property>
+			<name>hive.groupby.orderby.position.alias</name>
+			<value>false</value>
+			<description>Whether to enable using Column Position Alias in Group
+				By or Order By
+			</description>
+		</property>
+
+		<property>
+			<name>hive.server2.thrift.min.worker.threads</name>
+			<value>5</value>
+			<description>Minimum number of Thrift worker threads</description>
+		</property>
+
+		<property>
+			<name>hive.server2.thrift.max.worker.threads</name>
+			<value>100</value>
+			<description>Maximum number of Thrift worker threads</description>
+		</property>
+
+		<property>
+			<name>hive.server2.thrift.port</name>
+			<value>10000</value>
+			<description>Port number of HiveServer2 Thrift interface.
+				Can be
+				overridden by setting $HIVE_SERVER2_THRIFT_PORT
+			</description>
+		</property>
+
+		<property>
+			<name>hive.server2.thrift.bind.host</name>
+			<value>localhost</value>
+			<description>Bind host on which to run the HiveServer2 Thrift
+				interface.
+				Can be overridden by setting
+				$HIVE_SERVER2_THRIFT_BIND_HOST
+			</description>
+		</property>
+
+		<property>
+			<name>hive.server2.authentication</name>
+			<value>NONE</value>
+			<description>
+				Client authentication types.
+				NONE: no authentication
+				check
+				LDAP: LDAP/AD based authentication
+				KERBEROS: Kerberos/GSSAPI
+				authentication
+				CUSTOM: Custom authentication provider
+				(Use with
+				property hive.server2.custom.authentication.class)
+			</description>
+		</property>
+
+		<property>
+			<name>hive.server2.custom.authentication.class</name>
+			<value></value>
+			<description>
+				Custom authentication class. Used when property
+				'hive.server2.authentication' is set to 'CUSTOM'. Provided class
+				must be a proper implementation of the interface
+				org.apache.hive.service.auth.PasswdAuthenticationProvider.
+				HiveServer2
+				will call its Authenticate(user, passed) method to
+				authenticate
+				requests.
+				The implementation may optionally extend the
+				Hadoop's
+				org.apache.hadoop.conf.Configured class to grab Hive's
+				Configuration
+				object.
+			</description>
+		</property>
+
+		<property>
+			<name>>hive.server2.authentication.kerberos.principal</name>
+			<value></value>
+			<description>
+				Kerberos server principal
+			</description>
+		</property>
+
+		<property>
+			<name>>hive.server2.authentication.kerberos.keytab</name>
+			<value></value>
+			<description>
+				Kerberos keytab file for server principal
+			</description>
+		</property>
+
+		<property>
+			<name>hive.server2.authentication.ldap.url</name>
+			<value></value>
+			<description>
+				LDAP connection URL
+			</description>
+		</property>
+
+		<property>
+			<name>hive.server2.authentication.ldap.baseDN</name>
+			<value></value>
+			<description>
+				LDAP base DN
+			</description>
+		</property>
+
+		<property>
+			<name>hive.server2.enable.doAs</name>
+			<value>true</value>
+			<description>
+				Setting this property to true will have hive server2
+				execute
+				hive operations as the user making the calls to it.
+			</description>
+		</property>
+
+
+	</configuration>
+
+	<!-- Hive Execution Parameters -->
+	<property>
+		<name>mapred.reduce.tasks</name>
+		<value>-1</value>
+		<description>The default number of reduce tasks per job. Typically set
+			to a prime close to the number of available hosts. Ignored when
+			mapred.job.tracker is "local". Hadoop set this to 1 by default,
+			whereas hive uses -1 as its default value.
+			By setting this property to
+			-1, Hive will automatically figure out what
+			should be the number of
+			reducers.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.reducers.bytes.per.reducer</name>
+		<value>1000000000</value>
+		<description>size per reducer.The default is 1G, i.e if the input size
+			is 10G, it will use 10 reducers.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.reducers.max</name>
+		<value>999</value>
+		<description>max number of reducers will be used. If the one
+			specified
+			in the configuration parameter mapred.reduce.tasks is
+			negative, hive
+			will use this one as the max number of reducers when
+			automatically
+			determine number of reducers.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.cli.print.header</name>
+		<value>false</value>
+		<description>Whether to print the names of the columns in query
+			output.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.cli.print.current.db</name>
+		<value>false</value>
+		<description>Whether to include the current database in the hive
+			prompt.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.cli.prompt</name>
+		<value>hive</value>
+		<description>Command line prompt configuration value. Other hiveconf
+			can be used in
+			this configuration value. Variable substitution will
+			only be invoked at
+			the hive
+			cli startup.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.cli.pretty.output.num.cols</name>
+		<value>-1</value>
+		<description>The number of columns to use when formatting output
+			generated
+			by the DESCRIBE PRETTY table_name command. If the value of
+			this
+			property
+			is -1, then hive will use the auto-detected terminal
+			width.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.scratchdir</name>
+		<value>/tmp/hive-${user.name}</value>
+		<description>Scratch space for Hive jobs</description>
+	</property>
+
+	<property>
+		<name>hive.exec.local.scratchdir</name>
+		<value>/tmp/${user.name}</value>
+		<description>Local scratch space for Hive jobs</description>
+	</property>
+
+	<property>
+		<name>hive.test.mode</name>
+		<value>false</value>
+		<description>whether hive is running in test mode. If yes, it turns on
+			sampling and prefixes the output tablename
+		</description>
+	</property>
+
+	<property>
+		<name>hive.test.mode.prefix</name>
+		<value>test_</value>
+		<description>if hive is running in test mode, prefixes the output
+			table by this string
+		</description>
+	</property>
+
+	<!-- If the input table is not bucketed, the denominator of the tablesample 
+		is determinied by the parameter below -->
+	<!-- For example, the following query: -->
+	<!-- INSERT OVERWRITE TABLE dest -->
+	<!-- SELECT col1 from src -->
+	<!-- would be converted to -->
+	<!-- INSERT OVERWRITE TABLE test_dest -->
+	<!-- SELECT col1 from src TABLESAMPLE (BUCKET 1 out of 32 on rand(1)) -->
+	<property>
+		<name>hive.test.mode.samplefreq</name>
+		<value>32</value>
+		<description>if hive is running in test mode and table is not
+			bucketed, sampling frequency
+		</description>
+	</property>
+
+	<property>
+		<name>hive.test.mode.nosamplelist</name>
+		<value></value>
+		<description>if hive is running in test mode, dont sample the above
+			comma seperated list of tables
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.uris</name>
+		<value></value>
+		<description>Thrift uri for the remote metastore. Used by metastore
+			client to connect to remote metastore.
+		</description>
+	</property>
+
+	<property>
+		<name>javax.jdo.option.ConnectionURL</name>
+		<value>jdbc:derby:;databaseName=metastore_db;create=true</value>
+		<description>JDBC connect string for a JDBC metastore</description>
+	</property>
+
+	<property>
+		<name>javax.jdo.option.ConnectionDriverName</name>
+		<value>org.apache.derby.jdbc.EmbeddedDriver</value>
+		<description>Driver class name for a JDBC metastore</description>
+	</property>
+
+	<property>
+		<name>javax.jdo.PersistenceManagerFactoryClass</name>
+		<value>org.datanucleus.jdo.JDOPersistenceManagerFactory</value>
+		<description>class implementing the jdo persistence</description>
+	</property>
+
+	<property>
+		<name>javax.jdo.option.DetachAllOnCommit</name>
+		<value>true</value>
+		<description>detaches all objects from session so that they can be
+			used after transaction is committed
+		</description>
+	</property>
+
+	<property>
+		<name>javax.jdo.option.NonTransactionalRead</name>
+		<value>true</value>
+		<description>reads outside of transactions</description>
+	</property>
+
+	<property>
+		<name>javax.jdo.option.ConnectionUserName</name>
+		<value>APP</value>
+		<description>username to use against metastore database</description>
+	</property>
+
+	<property>
+		<name>javax.jdo.option.ConnectionPassword</name>
+		<value>mine</value>
+		<description>password to use against metastore database</description>
+	</property>
+
+	<property>
+		<name>javax.jdo.option.Multithreaded</name>
+		<value>true</value>
+		<description>Set this to true if multiple threads access metastore
+			through JDO concurrently.
+		</description>
+	</property>
+
+	<property>
+		<name>datanucleus.connectionPoolingType</name>
+		<value>DBCP</value>
+		<description>Uses a DBCP connection pool for JDBC metastore
+		</description>
+	</property>
+
+	<property>
+		<name>datanucleus.validateTables</name>
+		<value>false</value>
+		<description>validates existing schema against code. turn this on if
+			you want to verify existing schema
+		</description>
+	</property>
+
+	<property>
+		<name>datanucleus.validateColumns</name>
+		<value>false</value>
+		<description>validates existing schema against code. turn this on if
+			you want to verify existing schema
+		</description>
+	</property>
+
+	<property>
+		<name>datanucleus.validateConstraints</name>
+		<value>false</value>
+		<description>validates existing schema against code. turn this on if
+			you want to verify existing schema
+		</description>
+	</property>
+
+	<property>
+		<name>datanucleus.storeManagerType</name>
+		<value>rdbms</value>
+		<description>metadata store type</description>
+	</property>
+
+	<property>
+		<name>datanucleus.autoCreateSchema</name>
+		<value>true</value>
+		<description>creates necessary schema on a startup if one doesn't
+			exist. set this to false, after creating it once
+		</description>
+	</property>
+
+	<property>
+		<name>datanucleus.autoStartMechanismMode</name>
+		<value>checked</value>
+		<description>throw exception if metadata tables are incorrect
+		</description>
+	</property>
+
+	<property>
+		<name>datanucleus.transactionIsolation</name>
+		<value>read-committed</value>
+		<description>Default transaction isolation level for identity
+			generation.
+		</description>
+	</property>
+
+	<property>
+		<name>datanucleus.cache.level2</name>
+		<value>false</value>
+		<description>Use a level 2 cache. Turn this off if metadata is changed
+			independently of hive metastore server
+		</description>
+	</property>
+
+	<property>
+		<name>datanucleus.cache.level2.type</name>
+		<value>SOFT</value>
+		<description>SOFT=soft reference based cache, WEAK=weak reference
+			based cache.
+		</description>
+	</property>
+
+	<property>
+		<name>datanucleus.identifierFactory</name>
+		<value>datanucleus</value>
+		<description>Name of the identifier factory to use when generating
+			table/column names etc. 'datanucleus' is used for backward
+			compatibility
+		</description>
+	</property>
+
+	<property>
+		<name>datanucleus.plugin.pluginRegistryBundleCheck</name>
+		<value>LOG</value>
+		<description>Defines what happens when plugin bundles are found and
+			are duplicated [EXCEPTION|LOG|NONE]
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.warehouse.dir</name>
+		<value>/user/hive/warehouse</value>
+		<description>location of default database for the warehouse
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.execute.setugi</name>
+		<value>false</value>
+		<description>In unsecure mode, setting this property to true will
+			cause the metastore to execute DFS operations using the client's
+			reported user and group permissions. Note that this property must be
+			set on both the client and server sides. Further note that its best
+			effort. If client sets its to true and server sets it to false,
+			client setting will be ignored.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.event.listeners</name>
+		<value></value>
+		<description>list of comma seperated listeners for metastore events.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.partition.inherit.table.properties</name>
+		<value></value>
+		<description>list of comma seperated keys occurring in table
+			properties which will get inherited to newly created partitions. *
+			implies all the keys will get inherited.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metadata.export.location</name>
+		<value></value>
+		<description>When used in conjunction with the
+			org.apache.hadoop.hive.ql.parse.MetaDataExportListener pre event
+			listener, it is the location to which the metadata will be exported.
+			The default is an empty string, which results in the metadata being
+			exported to the current user's home directory on HDFS.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metadata.move.exported.metadata.to.trash</name>
+		<value></value>
+		<description>When used in conjunction with the
+			org.apache.hadoop.hive.ql.parse.MetaDataExportListener pre event
+			listener, this setting determines if the metadata that is exported
+			will subsequently be moved to the user's trash directory alongside
+			the dropped table data. This ensures that the metadata will be
+			cleaned up along with the dropped table data.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.partition.name.whitelist.pattern</name>
+		<value></value>
+		<description>Partition names will be checked against this regex
+			pattern and rejected if not matched.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.end.function.listeners</name>
+		<value></value>
+		<description>list of comma separated listeners for the end of
+			metastore functions.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.event.expiry.duration</name>
+		<value>0</value>
+		<description>Duration after which events expire from events table (in
+			seconds)
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.event.clean.freq</name>
+		<value>0</value>
+		<description>Frequency at which timer task runs to purge expired
+			events in metastore(in seconds).
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.connect.retries</name>
+		<value>5</value>
+		<description>Number of retries while opening a connection to metastore
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.failure.retries</name>
+		<value>3</value>
+		<description>Number of retries upon failure of Thrift metastore calls
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.client.connect.retry.delay</name>
+		<value>1</value>
+		<description>Number of seconds for the client to wait between
+			consecutive connection attempts
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.client.socket.timeout</name>
+		<value>20</value>
+		<description>MetaStore Client socket timeout in seconds</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.rawstore.impl</name>
+		<value>org.apache.hadoop.hive.metastore.ObjectStore</value>
+		<description>Name of the class that implements
+			org.apache.hadoop.hive.metastore.rawstore interface. This class is
+			used to store and retrieval of raw metadata objects such as table,
+			database
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.batch.retrieve.max</name>
+		<value>300</value>
+		<description>Maximum number of objects (tables/partitions) can be
+			retrieved from metastore in one batch. The higher the number, the
+			less the number of round trips is needed to the Hive metastore
+			server, but it may also cause higher memory requirement at the client
+			side.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.batch.retrieve.table.partition.max</name>
+		<value>1000</value>
+		<description>Maximum number of table partitions that metastore
+			internally retrieves in one batch.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.default.fileformat</name>
+		<value>TextFile</value>
+		<description>Default file format for CREATE TABLE statement. Options
+			are TextFile and SequenceFile. Users can explicitly say CREATE TABLE
+			... STORED AS &lt;TEXTFILE|SEQUENCEFILE&gt; to override</description>
+	</property>
+
+	<property>
+		<name>hive.fileformat.check</name>
+		<value>true</value>
+		<description>Whether to check file format or not when loading data
+			files
+		</description>
+	</property>
+
+	<property>
+		<name>hive.map.aggr</name>
+		<value>true</value>
+		<description>Whether to use map-side aggregation in Hive Group By
+			queries
+		</description>
+	</property>
+
+	<property>
+		<name>hive.groupby.skewindata</name>
+		<value>false</value>
+		<description>Whether there is skew in data to optimize group by
+			queries
+		</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.multigroupby.common.distincts</name>
+		<value>true</value>
+		<description>Whether to optimize a multi-groupby query with the same
+			distinct.
+			Consider a query like:
+
+			from src
+			insert overwrite table dest1
+			select col1, count(distinct colx) group by
+			col1
+			insert overwrite table
+			dest2 select col2, count(distinct colx) group by
+			col2;
+
+			With this
+			parameter set to true, first we spray by the distinct value
+			(colx),
+			and then
+			perform the 2 groups bys. This makes sense if map-side
+			aggregation is turned
+			off. However,
+			with maps-side aggregation, it
+			might be useful in some cases to treat the
+			2 inserts independently,
+			thereby performing the query above in 2MR jobs instead of 3 (due to
+			spraying
+			by distinct key first).
+			If this parameter is turned off, we
+			dont consider the fact that the
+			distinct key is the same across
+			different MR jobs.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.groupby.mapaggr.checkinterval</name>
+		<value>100000</value>
+		<description>Number of rows after which size of the grouping
+			keys/aggregation classes is performed
+		</description>
+	</property>
+
+	<property>
+		<name>hive.mapred.local.mem</name>
+		<value>0</value>
+		<description>For local mode, memory of the mappers/reducers
+		</description>
+	</property>
+
+	<property>
+		<name>hive.mapjoin.followby.map.aggr.hash.percentmemory</name>
+		<value>0.3</value>
+		<description>Portion of total memory to be used by map-side grup
+			aggregation hash table, when this group by is followed by map join
+		</description>
+	</property>
+
+	<property>
+		<name>hive.map.aggr.hash.force.flush.memory.threshold</name>
+		<value>0.9</value>
+		<description>The max memory to be used by map-side grup aggregation
+			hash table, if the memory usage is higher than this number, force to
+			flush data
+		</description>
+	</property>
+
+	<property>
+		<name>hive.map.aggr.hash.percentmemory</name>
+		<value>0.5</value>
+		<description>Portion of total memory to be used by map-side grup
+			aggregation hash table
+		</description>
+	</property>
+
+	<property>
+		<name>hive.map.aggr.hash.min.reduction</name>
+		<value>0.5</value>
+		<description>Hash aggregation will be turned off if the ratio between
+			hash
+			table size and input rows is bigger than this number. Set to 1 to
+			make
+			sure
+			hash aggregation is never turned off.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.cp</name>
+		<value>true</value>
+		<description>Whether to enable column pruner</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.index.filter</name>
+		<value>false</value>
+		<description>Whether to enable automatic use of indexes</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.index.groupby</name>
+		<value>false</value>
+		<description>Whether to enable optimization of group-by queries using
+			Aggregate indexes.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.ppd</name>
+		<value>true</value>
+		<description>Whether to enable predicate pushdown</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.ppd.storage</name>
+		<value>true</value>
+		<description>Whether to push predicates down into storage handlers.
+			Ignored when hive.optimize.ppd is false.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.ppd.recognizetransivity</name>
+		<value>true</value>
+		<description>Whether to transitively replicate predicate filters over
+			equijoin conditions.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.groupby</name>
+		<value>true</value>
+		<description>Whether to enable the bucketed group by from bucketed
+			partitions/tables.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.skewjoin.compiletime</name>
+		<value>false</value>
+		<description>Whether to create a separate plan for skewed keys for the
+			tables in the join.
+			This is based on the skewed keys stored in the
+			metadata. At compile time,
+			the plan is broken
+			into different joins: one
+			for the skewed keys, and the other for the
+			remaining keys. And then,
+			a
+			union is performed for the 2 joins generated above. So unless the
+			same skewed key is present
+			in both the joined tables, the join for the
+			skewed key will be
+			performed as a map-side join.
+
+			The main difference
+			between this paramater and hive.optimize.skewjoin is
+			that this
+			parameter
+			uses the skew information stored in the metastore to
+			optimize the plan at
+			compile time itself.
+			If there is no skew
+			information in the metadata, this parameter will
+			not have any affect.
+			Both hive.optimize.skewjoin.compiletime and hive.optimize.skewjoin
+			should
+			be set to true.
+			Ideally, hive.optimize.skewjoin should be
+			renamed as
+			hive.optimize.skewjoin.runtime, but not doing
+			so for
+			backward compatibility.
+
+			If the skew information is correctly stored in
+			the metadata,
+			hive.optimize.skewjoin.compiletime
+			would change the query
+			plan to take care of it, and hive.optimize.skewjoin
+			will be a no-op.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.union.remove</name>
+		<value>false</value>
+		<description>
+			Whether to remove the union and push the operators
+			between union and the
+			filesink above
+			union. This avoids an extra scan
+			of the output by union. This is
+			independently useful for union
+			queries, and specially useful when hive.optimize.skewjoin.compiletime
+			is set
+			to true, since an
+			extra union is inserted.
+
+			The merge is triggered
+			if either of hive.merge.mapfiles or
+			hive.merge.mapredfiles is set to
+			true.
+			If the user has set hive.merge.mapfiles to true and
+			hive.merge.mapredfiles to false, the idea was the
+			number of reducers
+			are few, so the number of files anyway are small.
+			However, with this
+			optimization,
+			we are increasing the number of files possibly by a big
+			margin. So, we
+			merge aggresively.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.mapred.supports.subdirectories</name>
+		<value>false</value>
+		<description>Whether the version of hadoop which is running supports
+			sub-directories for tables/partitions.
+			Many hive optimizations can be
+			applied if the hadoop version supports
+			sub-directories for
+			tables/partitions. It was added by MAPREDUCE-1501
+		</description>
+	</property>
+
+	<property>
+		<name>hive.multigroupby.singlemr</name>
+		<value>false</value>
+		<description>Whether to optimize multi group by query to generate
+			single M/R
+			job plan. If the multi group by query has common group by
+			keys, it will
+			be
+			optimized to generate single M/R job.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.map.groupby.sorted</name>
+		<value>false</value>
+		<description>If the bucketing/sorting properties of the table exactly
+			match the grouping key, whether to
+			perform the group by in the mapper
+			by using BucketizedHiveInputFormat. The
+			only downside to this
+			is that
+			it limits the number of mappers to the number of files.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.map.groupby.sorted.testmode</name>
+		<value>false</value>
+		<description>If the bucketing/sorting properties of the table exactly
+			match the grouping key, whether to
+			perform the group by in the mapper
+			by using BucketizedHiveInputFormat. If
+			the test mode is set, the plan
+			is not converted, but a query property is set to denote the same.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.new.job.grouping.set.cardinality</name>
+		<value>30</value>
+		<description>
+			Whether a new map-reduce job should be launched for
+			grouping
+			sets/rollups/cubes.
+			For a query like: select a, b, c, count(1)
+			from T group by a, b, c with
+			rollup;
+			4 rows are created per row: (a, b,
+			c), (a, b, null), (a, null, null),
+			(null, null, null).
+			This can lead to
+			explosion across map-reduce boundary if the cardinality
+			of T is very
+			high,
+			and map-side aggregation does not do a very good job.
+
+			This
+			parameter decides if hive should add an additional map-reduce job.
+			If
+			the grouping set
+			cardinality (4 in the example above), is more than
+			this value, a new MR job is
+			added under the
+			assumption that the orginal
+			group by will reduce the data size.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.join.emit.interval</name>
+		<value>1000</value>
+		<description>How many rows in the right-most join operand Hive should
+			buffer before emitting the join result.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.join.cache.size</name>
+		<value>25000</value>
+		<description>How many rows in the joining tables (except the streaming
+			table) should be cached in memory.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.mapjoin.bucket.cache.size</name>
+		<value>100</value>
+		<description>How many values in each keys in the map-joined table
+			should be cached in memory.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.mapjoin.cache.numrows</name>
+		<value>25000</value>
+		<description>How many rows should be cached by jdbm for map join.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.skewjoin</name>
+		<value>false</value>
+		<description>Whether to enable skew join optimization.
+			The algorithm is
+			as follows: At runtime, detect the keys with a large
+			skew. Instead of
+			processing those keys, store them temporarily in a hdfs directory. In
+			a
+			follow-up map-reduce
+			job, process those skewed keys. The same key
+			need not be skewed for all
+			the tables, and so,
+			the follow-up map-reduce
+			job (for the skewed keys) would be much faster,
+			since it would be a
+			map-join.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.skewjoin.key</name>
+		<value>100000</value>
+		<description>Determine if we get a skew key in join. If we see more
+			than the specified number of rows with the same key in join operator,
+			we think the key as a skew join key.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.skewjoin.mapjoin.map.tasks</name>
+		<value>10000</value>
+		<description> Determine the number of map task used in the follow up
+			map join job
+			for a skew join. It should be used together with
+			hive.skewjoin.mapjoin.min.split
+			to perform a fine grained control.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.skewjoin.mapjoin.min.split</name>
+		<value>33554432</value>
+		<description> Determine the number of map task at most used in the
+			follow up map join job
+			for a skew join by specifying the minimum split
+			size. It should be used
+			together with
+			hive.skewjoin.mapjoin.map.tasks
+			to perform a fine grained control.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.mapred.mode</name>
+		<value>nonstrict</value>
+		<description>The mode in which the hive operations are being
+			performed.
+			In strict mode, some risky queries are not allowed to run.
+			They
+			include:
+			Cartesian Product.
+			No partition being picked up for a
+			query.
+			Comparing bigints and strings.
+			Comparing bigints and doubles.
+			Orderby without limit.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.enforce.bucketmapjoin</name>
+		<value>false</value>
+		<description>If the user asked for bucketed map-side join, and it
+			cannot be performed,
+			should the query fail or not ? For eg, if the
+			buckets in the tables being
+			joined are
+			not a multiple of each other,
+			bucketed map-side join cannot be
+			performed, and the
+			query will fail if
+			hive.enforce.bucketmapjoin is set to true.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.script.maxerrsize</name>
+		<value>100000</value>
+		<description>Maximum number of bytes a script is allowed to emit to
+			standard error (per map-reduce task). This prevents runaway scripts
+			from filling logs partitions to capacity
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.script.allow.partial.consumption</name>
+		<value>false</value>
+		<description> When enabled, this option allows a user script to exit
+			successfully without consuming all the data from the standard input.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.script.operator.id.env.var</name>
+		<value>HIVE_SCRIPT_OPERATOR_ID</value>
+		<description> Name of the environment variable that holds the unique
+			script operator ID in the user's transform function (the custom
+			mapper/reducer that the user has specified in the query)
+		</description>
+	</property>
+
+	<property>
+		<name>hive.script.operator.truncate.env</name>
+		<value>false</value>
+		<description>Truncate each environment variable for external script in
+			scripts operator to 20KB (to fit system limits)
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.compress.output</name>
+		<value>false</value>
+		<description> This controls whether the final outputs of a query (to a
+			local/hdfs file or a hive table) is compressed. The compression codec
+			and other options are determined from hadoop config variables
+			mapred.output.compress*
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.compress.intermediate</name>
+		<value>false</value>
+		<description> This controls whether intermediate files produced by
+			hive between multiple map-reduce jobs are compressed. The compression
+			codec and other options are determined from hadoop config variables
+			mapred.output.compress*
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.parallel</name>
+		<value>false</value>
+		<description>Whether to execute jobs in parallel</description>
+	</property>
+
+	<property>
+		<name>hive.exec.parallel.thread.number</name>
+		<value>8</value>
+		<description>How many jobs at most can be executed in parallel
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.rowoffset</name>
+		<value>false</value>
+		<description>Whether to provide the row offset virtual column
+		</description>
+	</property>
+
+	<property>
+		<name>hive.task.progress</name>
+		<value>false</value>
+		<description>Whether Hive should periodically update task progress
+			counters during execution. Enabling this allows task progress to be
+			monitored more closely in the job tracker, but may impose a
+			performance penalty. This flag is automatically set to true for jobs
+			with hive.exec.dynamic.partition set to true.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.hwi.war.file</name>
+		<value>lib/hive-hwi-@VERSION@.war</value>
+		<description>This sets the path to the HWI war file, relative to
+			${HIVE_HOME}.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.hwi.listen.host</name>
+		<value>0.0.0.0</value>
+		<description>This is the host address the Hive Web Interface will
+			listen on
+		</description>
+	</property>
+
+	<property>
+		<name>hive.hwi.listen.port</name>
+		<value>9999</value>
+		<description>This is the port the Hive Web Interface will listen on
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.pre.hooks</name>
+		<value></value>
+		<description>Comma-separated list of pre-execution hooks to be invoked
+			for each statement. A pre-execution hook is specified as the name of
+			a Java class which implements the
+			org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.post.hooks</name>
+		<value></value>
+		<description>Comma-separated list of post-execution hooks to be
+			invoked for each statement. A post-execution hook is specified as the
+			name of a Java class which implements the
+			org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.failure.hooks</name>
+		<value></value>
+		<description>Comma-separated list of on-failure hooks to be invoked
+			for each statement. An on-failure hook is specified as the name of
+			Java class which implements the
+			org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.init.hooks</name>
+		<value></value>
+		<description>A comma separated list of hooks to be invoked at the
+			beginning of HMSHandler initialization. Aninit hook is specified as
+			the name of Java class which extends
+			org.apache.hadoop.hive.metastore.MetaStoreInitListener.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.client.stats.publishers</name>
+		<value></value>
+		<description>Comma-separated list of statistics publishers to be
+			invoked on counters on each job. A client stats publisher is
+			specified as the name of a Java class which implements the
+			org.apache.hadoop.hive.ql.stats.ClientStatsPublisher interface.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.client.stats.counters</name>
+		<value></value>
+		<description>Subset of counters that should be of interest for
+			hive.client.stats.publishers (when one wants to limit their
+			publishing). Non-display names should be used
+		</description>
+	</property>
+
+	<property>
+		<name>hive.merge.mapfiles</name>
+		<value>true</value>
+		<description>Merge small files at the end of a map-only job
+		</description>
+	</property>
+
+	<property>
+		<name>hive.merge.mapredfiles</name>
+		<value>false</value>
+		<description>Merge small files at the end of a map-reduce job
+		</description>
+	</property>
+
+	<property>
+		<name>hive.heartbeat.interval</name>
+		<value>1000</value>
+		<description>Send a heartbeat after this interval - used by mapjoin
+			and filter operators
+		</description>
+	</property>
+
+	<property>
+		<name>hive.merge.size.per.task</name>
+		<value>256000000</value>
+		<description>Size of merged files at the end of the job</description>
+	</property>
+
+	<property>
+		<name>hive.merge.smallfiles.avgsize</name>
+		<value>16000000</value>
+		<description>When the average output file size of a job is less than
+			this number, Hive will start an additional map-reduce job to merge
+			the output files into bigger files. This is only done for map-only
+			jobs if hive.merge.mapfiles is true, and for map-reduce jobs if
+			hive.merge.mapredfiles is true.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.mapjoin.smalltable.filesize</name>
+		<value>25000000</value>
+		<description>The threshold for the input file size of the small
+			tables; if the file size is smaller than this threshold, it will try
+			to convert the common join into map join
+		</description>
+	</property>
+
+	<property>
+		<name>hive.ignore.mapjoin.hint</name>
+		<value>true</value>
+		<description>Ignore the mapjoin hint</description>
+	</property>
+
+	<property>
+		<name>hive.mapjoin.localtask.max.memory.usage</name>
+		<value>0.90</value>
+		<description>This number means how much memory the local task can take
+			to hold the key/value into in-memory hash table; If the local task's
+			memory usage is more than this number, the local task will be abort
+			by themself. It means the data of small table is too large to be hold
+			in the memory.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.mapjoin.followby.gby.localtask.max.memory.usage</name>
+		<value>0.55</value>
+		<description>This number means how much memory the local task can take
+			to hold the key/value into in-memory hash table when this map join
+			followed by a group by; If the local task's memory usage is more than
+			this number, the local task will be abort by themself. It means the
+			data of small table is too large to be hold in the memory.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.mapjoin.check.memory.rows</name>
+		<value>100000</value>
+		<description>The number means after how many rows processed it needs
+			to check the memory usage
+		</description>
+	</property>
+
+	<property>
+		<name>hive.auto.convert.join</name>
+		<value>false</value>
+		<description>Whether Hive enable the optimization about converting
+			common join into mapjoin based on the input file size
+		</description>
+	</property>
+
+	<property>
+		<name>hive.auto.convert.join.noconditionaltask</name>
+		<value>true</value>
+		<description>Whether Hive enable the optimization about converting
+			common join into mapjoin based on the input file
+			size. If this
+			paramater is on, and the sum of size for n-1 of the
+			tables/partitions
+			for a n-way join is smaller than the
+			specified size, the join is
+			directly converted to a mapjoin (there is no
+			conditional task).
+		</description>
+	</property>
+
+	<property>
+		<name>hive.auto.convert.join.noconditionaltask.size</name>
+		<value>10000000</value>
+		<description>If hive.auto.convert.join.noconditionaltask is off, this
+			parameter does not take affect. However, if it
+			is on, and the sum of
+			size for n-1 of the tables/partitions for a n-way
+			join is smaller than
+			this size, the join is directly
+			converted to a mapjoin(there is no
+			conditional task). The default is 10MB
+		</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.mapjoin.mapreduce</name>
+		<value>false</value>
+		<description>If hive.auto.convert.join is off, this parameter does not
+			take
+			affect. If it is on, and if there are map-join jobs followed by a
+			map-reduce
+			job (for e.g a group by), each map-only job is merged with
+			the
+			following
+			map-reduce job.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.script.auto.progress</name>
+		<value>false</value>
+		<description>Whether Hive Tranform/Map/Reduce Clause should
+			automatically send progress information to TaskTracker to avoid the
+			task getting killed because of inactivity. Hive sends progress
+			information when the script is outputting to stderr. This option
+			removes the need of periodically producing stderr messages, but users
+			should be cautious because this may prevent infinite loops in the
+			scripts to be killed by TaskTracker.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.script.serde</name>
+		<value>org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe</value>
+		<description>The default serde for trasmitting input data to and
+			reading output data from the user scripts.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.binary.record.max.length</name>
+		<value>1000</value>
+		<description>Read from a binary stream and treat each
+			hive.binary.record.max.length bytes as a record.
+			The last record
+			before the end of stream can have less than
+			hive.binary.record.max.length bytes
+		</description>
+	</property>
+
+
+	<property>
+		<name>hive.script.recordreader</name>
+		<value>org.apache.hadoop.hive.ql.exec.TextRecordReader</value>
+		<description>The default record reader for reading data from the user
+			scripts.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.script.recordwriter</name>
+		<value>org.apache.hadoop.hive.ql.exec.TextRecordWriter</value>
+		<description>The default record writer for writing data to the user
+			scripts.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.input.format</name>
+		<value>org.apache.hadoop.hive.ql.io.CombineHiveInputFormat</value>
+		<description>The default input format. Set this to HiveInputFormat if
+			you encounter problems with CombineHiveInputFormat.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.udtf.auto.progress</name>
+		<value>false</value>
+		<description>Whether Hive should automatically send progress
+			information to TaskTracker when using UDTF's to prevent the task
+			getting killed because of inactivity. Users should be cautious
+			because this may prevent TaskTracker from killing tasks with infinte
+			loops.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.mapred.reduce.tasks.speculative.execution</name>
+		<value>true</value>
+		<description>Whether speculative execution for reducers should be
+			turned on.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.counters.pull.interval</name>
+		<value>1000</value>
+		<description>The interval with which to poll the JobTracker for the
+			counters the running job. The smaller it is the more load there will
+			be on the jobtracker, the higher it is the less granular the caught
+			will be.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.querylog.location</name>
+		<value>/tmp/${user.name}</value>
+		<description>
+			Location of Hive run time structured log file
+		</description>
+	</property>
+
+	<property>
+		<name>hive.querylog.enable.plan.progress</name>
+		<value>true</value>
+		<description>
+			Whether to log the plan's progress every time a job's
+			progress is checked.
+			These logs are written to the location specified
+			by
+			hive.querylog.location
+		</description>
+	</property>
+
+	<property>
+		<name>hive.querylog.plan.progress.interval</name>
+		<value>60000</value>
+		<description>
+			The interval to wait between logging the plan's progress
+			in
+			milliseconds.
+			If there is a whole number percentage change in the
+			progress of the
+			mappers or the reducers,
+			the progress is logged
+			regardless of this value.
+			The actual interval will be the ceiling of
+			(this value divided by the
+			value of
+			hive.exec.counters.pull.interval)
+			multiplied by the value of hive.exec.counters.pull.interval
+			I.e. if it
+			is not divide evenly by the value of
+			hive.exec.counters.pull.interval
+			it will be
+			logged less frequently than specified.
+			This only has an
+			effect if hive.querylog.enable.plan.progress is set to
+			true.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.enforce.bucketing</name>
+		<value>false</value>
+		<description>Whether bucketing is enforced. If true, while inserting
+			into the table, bucketing is enforced.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.enforce.sorting</name>
+		<value>false</value>
+		<description>Whether sorting is enforced. If true, while inserting
+			into the table, sorting is enforced.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.bucketingsorting</name>
+		<value>true</value>
+		<description>If hive.enforce.bucketing or hive.enforce.sorting is
+			true, dont create a reducer for enforcing
+			bucketing/sorting for
+			queries of the form:
+			insert overwrite table T2 select * from T1;
+			where
+			T1 and T2 are bucketed/sorted by the same keys into the same number
+			of buckets.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.enforce.sortmergebucketmapjoin</name>
+		<value>false</value>
+		<description>If the user asked for sort-merge bucketed map-side join,
+			and it cannot be performed,
+			should the query fail or not ?
+		</description>
+	</property>
+
+	<property>
+		<name>hive.auto.convert.sortmerge.join</name>
+		<value>false</value>
+		<description>Will the join be automatically converted to a sort-merge
+			join, if the joined tables pass
+			the criteria for sort-merge join.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.auto.convert.sortmerge.join.bigtable.selection.policy
+		</name>
+		<value>org.apache.hadoop.hive.ql.optimizer.AvgPartitionSizeBasedBigTableSelectorForAutoSMJ
+		</value>
+		<description>The policy to choose the big table for automatic
+			conversion to sort-merge join.
+			By default, the table with the largest
+			partitions is assigned the big
+			table. All policies are:
+			. based on
+			position of the table - the leftmost table is selected
+			org.apache.hadoop.hive.ql.optimizer.LeftmostBigTableSMJ.
+			. based on
+			total size (all the partitions selected in the query) of
+			the table
+			org.apache.hadoop.hive.ql.optimizer.TableSizeBasedBigTableSelectorForAutoSMJ.
+			. based on average size (all the partitions selected in the query) of
+			the table
+			org.apache.hadoop.hive.ql.optimizer.AvgPartitionSizeBasedBigTableSelectorForAutoSMJ.
+			New policies can be added in future.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.ds.connection.url.hook</name>
+		<value></value>
+		<description>Name of the hook to use for retriving the JDO connection
+			URL. If empty, the value in javax.jdo.option.ConnectionURL is used
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.ds.retry.attempts</name>
+		<value>1</value>
+		<description>The number of times to retry a metastore call if there
+			were a connection error
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.ds.retry.interval</name>
+		<value>1000</value>
+		<description>The number of miliseconds between metastore retry
+			attempts
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.server.min.threads</name>
+		<value>200</value>
+		<description>Minimum number of worker threads in the Thrift server's
+			pool.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.server.max.threads</name>
+		<value>100000</value>
+		<description>Maximum number of worker threads in the Thrift server's
+			pool.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.server.tcp.keepalive</name>
+		<value>true</value>
+		<description>Whether to enable TCP keepalive for the metastore server.
+			Keepalive will prevent accumulation of half-open connections.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.sasl.enabled</name>
+		<value>false</value>
+		<description>If true, the metastore thrift interface will be secured
+			with SASL. Clients must authenticate with Kerberos.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.thrift.framed.transport.enabled</name>
+		<value>false</value>
+		<description>If true, the metastore thrift interface will use
+			TFramedTransport. When false (default) a standard TTransport is used.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.kerberos.keytab.file</name>
+		<value></value>
+		<description>The path to the Kerberos Keytab file containing the
+			metastore thrift server's service principal.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.kerberos.principal</name>
+		<value>hive-metastore/_HOST@EXAMPLE.COM</value>
+		<description>The service principal for the metastore thrift server.
+			The special string _HOST will be replaced automatically with the
+			correct host name.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.cluster.delegation.token.store.class</name>
+		<value>org.apache.hadoop.hive.thrift.MemoryTokenStore</value>
+		<description>The delegation token store implementation. Set to
+			org.apache.hadoop.hive.thrift.ZooKeeperTokenStore for load-balanced
+			cluster.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.cluster.delegation.token.store.zookeeper.connectString
+		</name>
+		<value>localhost:2181</value>
+		<description>The ZooKeeper token store connect string.</description>
+	</property>
+
+	<property>
+		<name>hive.cluster.delegation.token.store.zookeeper.znode</name>
+		<value>/hive/cluster/delegation</value>
+		<description>The root path for token store data.</description>
+	</property>
+
+	<property>
+		<name>hive.cluster.delegation.token.store.zookeeper.acl</name>
+		<value>sasl:hive/host1@EXAMPLE.COM:cdrwa,sasl:hive/host2@EXAMPLE.COM:cdrwa
+		</value>
+		<description>ACL for token store entries. List comma separated all
+			server principals for the cluster.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.cache.pinobjtypes</name>
+		<value>Table,StorageDescriptor,SerDeInfo,Partition,Database,Type,FieldSchema,Order
+		</value>
+		<description>List of comma separated metastore object types that
+			should be pinned in the cache
+		</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.reducededuplication</name>
+		<value>true</value>
+		<description>Remove extra map-reduce jobs if the data is already
+			clustered by the same key which needs to be used again. This should
+			always be set to true. Since it is a new feature, it has been made
+			configurable.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.reducededuplication.min.reducer</name>
+		<value>4</value>
+		<description>Reduce deduplication merges two RSs by moving
+			key/parts/reducer-num of the child RS to parent RS.
+			That means if
+			reducer-num of the child RS is fixed (order by or forced
+			bucketing)
+			and small, it can make very slow, single MR.
+			The optimization will be
+			disabled if number of reducers is less than
+			specified value.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.dynamic.partition</name>
+		<value>true</value>
+		<description>Whether or not to allow dynamic partitions in DML/DDL.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.dynamic.partition.mode</name>
+		<value>strict</value>
+		<description>In strict mode, the user must specify at least one static
+			partition in case the user accidentally overwrites all partitions.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.max.dynamic.partitions</name>
+		<value>1000</value>
+		<description>Maximum number of dynamic partitions allowed to be
+			created in total.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.max.dynamic.partitions.pernode</name>
+		<value>100</value>
+		<description>Maximum number of dynamic partitions allowed to be
+			created in each mapper/reducer node.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.max.created.files</name>
+		<value>100000</value>
+		<description>Maximum number of HDFS files created by all
+			mappers/reducers in a MapReduce job.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.default.partition.name</name>
+		<value>__HIVE_DEFAULT_PARTITION__</value>
+		<description>The default partition name in case the dynamic partition
+			column value is null/empty string or anyother values that cannot be
+			escaped. This value must not contain any special character used in
+			HDFS URI (e.g., ':', '%', '/' etc). The user has to be aware that the
+			dynamic partition value should not contain this value to avoid
+			confusions.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.stats.dbclass</name>
+		<value>jdbc:derby</value>
+		<description>The default database that stores temporary hive
+			statistics.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.stats.autogather</name>
+		<value>true</value>
+		<description>A flag to gather statistics automatically during the
+			INSERT OVERWRITE command.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.stats.jdbcdriver</name>
+		<value>org.apache.derby.jdbc.EmbeddedDriver</value>
+		<description>The JDBC driver for the database that stores temporary
+			hive statistics.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.stats.dbconnectionstring</name>
+		<value>jdbc:derby:;databaseName=TempStatsStore;create=true</value>
+		<description>The default connection string for the database that
+			stores temporary hive statistics.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.stats.default.publisher</name>
+		<value></value>
+		<description>The Java class (implementing the StatsPublisher
+			interface) that is used by default if hive.stats.dbclass is not JDBC
+			or HBase.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.stats.default.aggregator</name>
+		<value></value>
+		<description>The Java class (implementing the StatsAggregator
+			interface) that is used by default if hive.stats.dbclass is not JDBC
+			or HBase.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.stats.jdbc.timeout</name>
+		<value>30</value>
+		<description>Timeout value (number of seconds) used by JDBC connection
+			and statements.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.stats.retries.max</name>
+		<value>0</value>
+		<description>Maximum number of retries when stats publisher/aggregator
+			got an exception updating intermediate database. Default is no tries
+			on failures.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.stats.retries.wait</name>
+		<value>3000</value>
+		<description>The base waiting window (in milliseconds) before the next
+			retry. The actual wait time is calculated by baseWindow * failues
+			baseWindow * (failure 1) * (random number between [0.0,1.0]).
+		</description>
+	</property>
+
+	<property>
+		<name>hive.stats.reliable</name>
+		<value>false</value>
+		<description>Whether queries will fail because stats cannot be
+			collected completely accurately.
+			If this is set to true,
+			reading/writing from/into a partition may fail
+			becuase the stats
+			could
+			not be computed accurately.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.stats.collect.tablekeys</name>
+		<value>false</value>
+		<description>Whether join and group by keys on tables are derived and
+			maintained in the QueryPlan.
+			This is useful to identify how tables are
+			accessed and to determine if
+			they should be bucketed.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.stats.collect.scancols</name>
+		<value>false</value>
+		<description>Whether column accesses are tracked in the QueryPlan.
+			This is useful to identify how tables are accessed and to determine
+			if there are wasted columns that can be trimmed.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.stats.ndv.error</name>
+		<value>20.0</value>
+		<description>Standard error expressed in percentage. Provides a
+			tradeoff between accuracy and compute cost.A lower value for error
+			indicates higher accuracy and a higher compute cost.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.stats.key.prefix.max.length</name>
+		<value>200</value>
+		<description>
+			Determines if when the prefix of the key used for
+			intermediate stats collection
+			exceeds a certain length, a hash of the
+			key is used instead. If the
+			value &lt; 0 then hashing
+			is never used, if
+			the value >= 0 then hashing is used only when the key
+			prefixes length
+			exceeds that value. The key prefix is defined as everything preceding
+			the
+			task ID in the key.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.support.concurrency</name>
+		<value>false</value>
+		<description>Whether hive supports concurrency or not. A zookeeper
+			instance must be up and running for the default hive lock manager to
+			support read-write locks.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.lock.numretries</name>
+		<value>100</value>
+		<description>The number of times you want to try to get all the locks
+		</description>
+	</property>
+
+	<property>
+		<name>hive.unlock.numretries</name>
+		<value>10</value>
+		<description>The number of times you want to retry to do one unlock
+		</description>
+	</property>
+
+	<property>
+		<name>hive.lock.sleep.between.retries</name>
+		<value>60</value>
+		<description>The sleep time (in seconds) between various retries
+		</description>
+	</property>
+
+	<property>
+		<name>hive.zookeeper.quorum</name>
+		<value></value>
+		<description>The list of zookeeper servers to talk to. This is only
+			needed for read/write locks.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.zookeeper.client.port</name>
+		<value>2181</value>
+		<description>The port of zookeeper servers to talk to. This is only
+			needed for read/write locks.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.zookeeper.session.timeout</name>
+		<value>600000</value>
+		<description>Zookeeper client's session timeout. The client is
+			disconnected, and as a result, all locks released, if a heartbeat is
+			not sent in the timeout.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.zookeeper.namespace</name>
+		<value>hive_zookeeper_namespace</value>
+		<description>The parent node under which all zookeeper nodes are
+			created.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.zookeeper.clean.extra.nodes</name>
+		<value>false</value>
+		<description>Clean extra nodes at the end of the session.
+		</description>
+	</property>
+
+	<property>
+		<name>fs.har.impl</name>
+		<value>org.apache.hadoop.hive.shims.HiveHarFileSystem</value>
+		<description>The implementation for accessing Hadoop Archives. Note
+			that this won't be applicable to Hadoop vers less than 0.20
+		</description>
+	</property>
+
+	<property>
+		<name>hive.archive.enabled</name>
+		<value>false</value>
+		<description>Whether archiving operations are permitted</description>
+	</property>
+
+	<property>
+		<name>hive.fetch.output.serde</name>
+		<value>org.apache.hadoop.hive.serde2.DelimitedJSONSerDe</value>
+		<description>The serde used by FetchTask to serialize the fetch
+			output.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.mode.local.auto</name>
+		<value>false</value>
+		<description> Let hive determine whether to run in local mode
+			automatically
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.drop.ignorenonexistent</name>
+		<value>true</value>
+		<description>
+			Do not report an error if DROP TABLE/VIEW specifies a
+			non-existent
+			table/view
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.show.job.failure.debug.info</name>
+		<value>true</value>
+		<description>
+			If a job fails, whether to provide a link in the CLI to
+			the task with
+			the
+			most failures, along with debugging hints if
+			applicable.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.auto.progress.timeout</name>
+		<value>0</value>
+		<description>
+			How long to run autoprogressor for the script/UDTF
+			operators (in
+			seconds).
+			Set to 0 for forever.
+		</description>
+	</property>
+
+	<!-- HBase Storage Handler Parameters -->
+
+	<property>
+		<name>hive.hbase.wal.enabled</name>
+		<value>true</value>
+		<description>Whether writes to HBase should be forced to the
+			write-ahead log. Disabling this improves HBase write performance at
+			the risk of lost writes in case of a crash.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.table.parameters.default</name>
+		<value></value>
+		<description>Default property values for newly created tables
+		</description>
+	</property>
+
+	<property>
+		<name>hive.entity.separator</name>
+		<value>@</value>
+		<description>Separator used to construct names of tables and
+			partitions. For example, dbname@tablename@partitionname
+		</description>
+	</property>
+
+	<property>
+		<name>hive.ddl.createtablelike.properties.whitelist</name>
+		<value></value>
+		<description>Table Properties to copy over when executing a Create
+			Table Like.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.variable.substitute</name>
+		<value>true</value>
+		<description>This enables substitution using syntax like ${var}
+			${system:var} and ${env:var}.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.variable.substitute.depth</name>
+		<value>40</value>
+		<description>The maximum replacements the substitution engine will do.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.conf.validation</name>
+		<value>true</value>
+		<description>Eables type checking for registered hive configurations
+		</description>
+	</property>
+
+	<property>
+		<name>hive.security.authorization.enabled</name>
+		<value>false</value>
+		<description>enable or disable the hive client authorization
+		</description>
+	</property>
+
+	<property>
+		<name>hive.security.authorization.createtable.user.grants</name>
+		<value></value>
+		<description>the privileges automatically granted to some users
+			whenever a table gets created.
+			An example like
+			"userX,userY:select;userZ:create" will grant select
+			privilege to userX
+			and userY,
+			and grant create privilege to userZ whenever a new table
+			created.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.security.authorization.createtable.group.grants</name>
+		<value></value>
+		<description>the privileges automatically granted to some groups
+			whenever a table gets created.
+			An example like
+			"groupX,groupY:select;groupZ:create" will grant select
+			privilege to
+			groupX and groupY,
+			and grant create privilege to groupZ whenever a new
+			table created.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.security.authorization.createtable.role.grants</name>
+		<value></value>
+		<description>the privileges automatically granted to some roles
+			whenever a table gets created.
+			An example like
+			"roleX,roleY:select;roleZ:create" will grant select
+			privilege to roleX
+			and roleY,
+			and grant create privilege to roleZ whenever a new table
+			created.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.security.authorization.createtable.owner.grants</name>
+		<value></value>
+		<description>the privileges automatically granted to the owner
+			whenever a table gets created.
+			An example like "select,drop" will
+			grant select and drop privilege to
+			the owner of the table
+		</description>
+	</property>
+
+	<property>
+		<name>hive.metastore.authorization.storage.checks</name>
+		<value>false</value>
+		<description>Should the metastore do authorization checks against the
+			underlying storage
+			for operations like drop-partition (disallow the
+			drop-partition if the
+			user in
+			question doesn't have permissions to
+			delete the corresponding directory
+			on the storage).
+		</description>
+	</property>
+
+	<property>
+		<name>hive.error.on.empty.partition</name>
+		<value>false</value>
+		<description>Whether to throw an excpetion if dynamic partition insert
+			generates empty results.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.index.compact.file.ignore.hdfs</name>
+		<value>false</value>
+		<description>True the hdfs location stored in the index file will be
+			igbored at runtime.
+			If the data got moved or the name of the cluster
+			got changed, the index
+			data should still be usable.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.index.filter.compact.minsize</name>
+		<value>5368709120</value>
+		<description>Minimum size (in bytes) of the inputs on which a compact
+			index is automatically used.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.optimize.index.filter.compact.maxsize</name>
+		<value>-1</value>
+		<description>Maximum size (in bytes) of the inputs on which a compact
+			index is automatically used.
+			A negative number is equivalent to
+			infinity.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.index.compact.query.max.size</name>
+		<value>10737418240</value>
+		<description>The maximum number of bytes that a query using the
+			compact index can read. Negative value is equivalent to infinity.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.index.compact.query.max.entries</name>
+		<value>10000000</value>
+		<description>The maximum number of index entries to read during a
+			query that uses the compact index. Negative value is equivalent to
+			infinity.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.index.compact.binary.search</name>
+		<value>true</value>
+		<description>Whether or not to use a binary search to find the entries
+			in an index table that match the filter, where possible
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exim.uri.scheme.whitelist</name>
+		<value>hdfs,pfile</value>
+		<description>A comma separated list of acceptable URI schemes for
+			import and export.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.lock.mapred.only.operation</name>
+		<value>false</value>
+		<description>This param is to control whether or not only do lock on
+			queries
+			that need to execute at least one mapred job.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.limit.row.max.size</name>
+		<value>100000</value>
+		<description>When trying a smaller subset of data for simple LIMIT,
+			how much size we need to guarantee
+			each row to have at least.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.limit.optimize.limit.file</name>
+		<value>10</value>
+		<description>When trying a smaller subset of data for simple LIMIT,
+			maximum number of files we can
+			sample.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.limit.optimize.enable</name>
+		<value>false</value>
+		<description>Whether to enable to optimization to trying a smaller
+			subset of data for simple LIMIT first.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.limit.optimize.fetch.max</name>
+		<value>50000</value>
+		<description>Maximum number of rows allowed for a smaller subset of
+			data for simple LIMIT, if it is a fetch query.
+			Insert queries are not
+			restricted by this limit.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.rework.mapredwork</name>
+		<value>false</value>
+		<description>should rework the mapred work or not.
+			This is first
+			introduced by SymlinkTextInputFormat to replace symlink
+			files with
+			real paths at compile time.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.concatenate.check.index</name>
+		<value>true</value>
+		<description>If this sets to true, hive will throw error when doing
+			'alter table tbl_name [partSpec] concatenate' on a table/partition
+			that has indexes on it. The reason the user want to set this to true
+			is because it can help user to avoid handling all index drop,
+			recreation,
+			rebuild work. This is very helpful for tables with
+			thousands of partitions.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.sample.seednumber</name>
+		<value>0</value>
+		<description>A number used to percentage sampling. By changing this
+			number, user will change the subsets
+			of data sampled.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.io.exception.handlers</name>
+		<value></value>
+		<description>A list of io exception handler class names. This is used
+			to construct a list exception handlers to handle exceptions thrown
+			by
+			record readers
+		</description>
+	</property>
+
+	<property>
+		<name>hive.autogen.columnalias.prefix.label</name>
+		<value>_c</value>
+		<description>String used as a prefix when auto generating column
+			alias.
+			By default the prefix label will be appended with a column
+			position
+			number to form the column alias. Auto generation would happen
+			if an
+			aggregate function is used in a select clause without an
+			explicit
+			alias.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.autogen.columnalias.prefix.includefuncname</name>
+		<value>false</value>
+		<description>Whether to include function name in the column alias auto
+			generated by hive.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.perf.logger</name>
+		<value>org.apache.hadoop.hive.ql.log.PerfLogger</value>
+		<description>The class responsible logging client side performance
+			metrics. Must be a subclass of
+			org.apache.hadoop.hive.ql.log.PerfLogger
+		</description>
+	</property>
+
+	<property>
+		<name>hive.start.cleanup.scratchdir</name>
+		<value>false</value>
+		<description>To cleanup the hive scratchdir while starting the hive
+			server
+		</description>
+	</property>
+
+	<property>
+		<name>hive.output.file.extension</name>
+		<value></value>
+		<description>String used as a file extension for output files. If not
+			set, defaults to the codec extension for text files (e.g. ".gz"), or
+			no extension otherwise.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.insert.into.multilevel.dirs</name>
+		<value>false</value>
+		<description>Where to insert into multilevel directories like
+			"insert
+			directory '/HIVEFT25686/chinna/' from table"
+		</description>
+	</property>
+
+	<property>
+		<name>hive.warehouse.subdir.inherit.perms</name>
+		<value>false</value>
+		<description>Set this to true if the the table directories should
+			inherit the
+			permission of the warehouse or database directory instead
+			of being created
+			with the permissions derived from dfs umask
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.job.debug.capture.stacktraces</name>
+		<value>true</value>
+		<description>Whether or not stack traces parsed from the task logs of
+			a sampled failed task for
+			each failed job should be stored in the
+			SessionState
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.driver.run.hooks</name>
+		<value></value>
+		<description>A comma separated list of hooks which implement
+			HiveDriverRunHook and will be run at the
+			beginning and end of
+			Driver.run, these will be run in the order specified
+		</description>
+	</property>
+
+	<property>
+		<name>hive.ddl.output.format</name>
+		<value>text</value>
+		<description>
+			The data format to use for DDL output. One of "text" (for
+			human
+			readable text) or "json" (for a json object).
+		</description>
+	</property>
+
+	<property>
+		<name>hive.transform.escape.input</name>
+		<value>false</value>
+		<description>
+			This adds an option to escape special chars (newlines,
+			carriage returns
+			and
+			tabs) when they are passed to the user script.
+			This is useful if the hive
+			tables
+			can contain data that contains
+			special characters.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.rcfile.use.explicit.header</name>
+		<value>true</value>
+		<description>
+			If this is set the header for RC Files will simply be
+			RCF. If this is
+			not
+			set the header will be that borrowed from sequence
+			files, e.g. SEQ-
+			followed
+			by the input and output RC File formats.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.multi.insert.move.tasks.share.dependencies</name>
+		<value>false</value>
+		<description>
+			If this is set all move tasks for tables/partitions (not
+			directories)
+			at the end of a
+			multi-insert query will only begin once
+			the dependencies for all these move tasks
+			have been
+			met.
+			Advantages: If
+			concurrency is enabled, the locks will only be released once the
+			query has
+			finished, so with this config enabled, the time when the
+			table/partition is
+			generated will be much closer to when the lock on
+			it is released.
+			Disadvantages: If concurrency is not enabled, with
+			this disabled, the
+			tables/partitions which
+			are produced by this query
+			and finish earlier will be available for
+			querying
+			much earlier. Since
+			the locks are only released once the query finishes,
+			this
+			does not
+			apply if concurrency is enabled.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.fetch.task.conversion</name>
+		<value>minimal</value>
+		<description>
+			Some select queries can be converted to single FETCH task
+			minimizing
+			latency.
+			Currently the query should be single sourced not
+			having any subquery and
+			should not have
+			any aggregations or distincts
+			(which incurrs RS), lateral views and
+			joins.
+			1. minimal : SELECT STAR,
+			FILTER on partition columns, LIMIT only
+			2. more : SELECT, FILTER,
+			LIMIT only (TABLESAMPLE, virtual columns)
+		</description>
+	</property>
+
+	<property>
+		<name>hive.hmshandler.retry.attempts</name>
+		<value>1</value>
+		<description>The number of times to retry a HMSHandler call if there
+			were a connection error
+		</description>
+	</property>
+
+	<property>
+		<name>hive.hmshandler.retry.interval</name>
+		<value>1000</value>
+		<description>The number of miliseconds between HMSHandler retry
+			attempts
+		</description>
+	</property>
+
+	<property>
+		<name>hive.server.read.socket.timeout</name>
+		<value>10</value>
+		<description>Timeout for the HiveServer to close the connection if no
+			response from the client in N seconds, defaults to 10 seconds.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.server.tcp.keepalive</name>
+		<value>true</value>
+		<description>Whether to enable TCP keepalive for the Hive server.
+			Keepalive will prevent accumulation of half-open connections.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.decode.partition.name</name>
+		<value>false</value>
+		<description>Whether to show the unquoted partition names in query
+			results.
+		</description>
+	</property>
+
+	<property>
+		<name>hive.log4j.file</name>
+		<value></value>
+		<description>Hive log4j configuration file.
+			If the property is not set,
+			then logging will be initialized using
+			hive-log4j.properties found on
+			the classpath.
+			If the property is set, the value must be a valid URI
+			(java.net.URI,
+			e.g. "file:///tmp/my-logging.properties"), which you
+			can then extract
+			a URL from and pass to
+			PropertyConfigurator.configure(URL).
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.log4j.file</name>
+		<value></value>
+		<description>Hive log4j configuration file for execution mode(sub
+			command).
+			If the property is not set, then logging will be initialized
+			using
+			hive-exec-log4j.properties found on the classpath.
+			If the
+			property is set, the value must be a valid URI (java.net.URI,
+			e.g.
+			"file:///tmp/my-logging.properties"), which you can then extract
+			a URL
+			from and pass to PropertyConfigurator.configure(URL).
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.infer.bucket.sort</name>
+		<value>false</value>
+		<description>
+			If this is set, when writing partitions, the metadata
+			will include the
+			bucketing/sorting
+			properties with which the data was
+			written if any (this will not overwrite the
+			metadata
+			inherited from the
+			table if the table is bucketed/sorted)
+		</description>
+	</property>
+
+	<property>
+		<name>hive.exec.infer.bucket.sort.num.buckets.power.two</name>
+		<value>false</value>
+		<description>
+			If this is set, when setting the number of reducers for
+			the map reduce
+			task which writes the
+			final output files, it will choose
+			a number which is a power of two,
+			unless the user specifies
+			the number
+			of reducers to use using mapred.reduce.tasks. The number of
+			reducers
+			may be set to a power of two, only to be followed by a merge task
+			meaning preventing
+			anything from being inferred.
+			With
+			hive.exec.infer.bucket.sort set to true:
+			Advantages: If this is not
+			set, the number of buckets for partitions will seem
+			arbitrary,
+			which
+			means that the number of mappers used for optimized joins, for
+			example, will
+			be very low. With this set, since the number of buckets
+			used for any
+			partition is
+			a power of two, the number of mappers used
+			for optimized joins will be
+			the least
+			number of buckets used by any
+			partition being joined.
+			Disadvantages: This may mean a much larger or
+			much smaller number of reducers being
+			used in the
+			final map reduce job,
+			e.g. if a job was originally going to take 257
+			reducers,
+			it will now
+			take 512 reducers, similarly if the max number of reducers
+			is 511,
+			and
+			a job was going to use this many, it will now use 256 reducers.
+
+		</description>
+	</property>
+
+	<property>
+		<name>hive.groupby.orderby.position.alias</name>
+		<value>false</value>
+		<description>Whether to enable using Column Position Alias in Group By
+			or Order By
+		</description>
+	</property>
+
+	<property>
+		<name>hive.server2.thrift.min.worker.threads</name>
+		<value>5</value>
+		<description>Minimum number of Thrift worker threads</description>
+	</property>
+
+	<property>
+		<name>hive.server2.thrift.max.worker.threads</name>
+		<value>100</value>
+		<description>Maximum number of Thrift worker threads</description>
+	</property>
+
+	<property>
+		<name>hive.server2.thrift.port</name>
+		<value>10000</value>
+		<description>Port number of HiveServer2 Thrift interface.
+			Can be
+			overridden by setting $HIVE_SERVER2_THRIFT_PORT
+		</description>
+	</property>
+
+	<property>
+		<name>hive.server2.thrift.bind.host</name>
+		<value>localhost</value>
+		<description>Bind host on which to run the HiveServer2 Thrift
+			interface.
+			Can be overridden by setting $HIVE_SERVER2_THRIFT_BIND_HOST
+		</description>
+	</property>
+
+	<property>
+		<name>hive.server2.authentication</name>
+		<value>NONE</value>
+		<description>
+			Client authentication types.
+			NONE: no authentication check
+			LDAP: LDAP/AD based authentication
+			KERBEROS: Kerberos/GSSAPI
+			authentication
+			CUSTOM: Custom authentication provider
+			(Use with
+			property hive.server2.custom.authentication.class)
+		</description>
+	</property>
+
+	<property>
+		<name>hive.server2.custom.authentication.class</name>
+		<value></value>
+		<description>
+			Custom authentication class. Used when property
+			'hive.server2.authentication' is set to 'CUSTOM'. Provided class
+			must
+			be a proper implementation of the interface
+			org.apache.hive.service.auth.PasswdAuthenticationProvider.
+			HiveServer2
+			will call its Authenticate(user, passed) method to
+			authenticate requests.
+			The implementation may optionally extend the
+			Hadoop's
+			org.apache.hadoop.conf.Configured class to grab Hive's
+			Configuration
+			object.
+		</description>
+	</property>
+
+	<property>
+		<name>>hive.server2.authentication.kerberos.principal</name>
+		<value></value>
+		<description>
+			Kerberos server principal
+		</description>
+	</property>
+
+	<property>
+		<name>>hive.server2.authentication.kerberos.keytab</name>
+		<value></value>
+		<description>
+			Kerberos keytab file for server principal
+		</description>
+	</property>
+
+	<property>
+		<name>hive.server2.authentication.ldap.url</name>
+		<value></value>
+		<description>
+			LDAP connection URL
+		</description>
+	</property>
+
+	<property>
+		<name>hive.server2.authentication.ldap.baseDN</name>
+		<value></value>
+		<description>
+			LDAP base DN
+		</description>
+	</property>
+
+	<property>
+		<name>hive.server2.enable.doAs</name>
+		<value>true</value>
+		<description>
+			Setting this property to true will have hive server2
+			execute
+			hive operations as the user making the calls to it.
+		</description>
+	</property>
+
+
+</configuration>
diff --git a/hivesterix/hivesterix-dist/src/main/resources/scripts/copylog.sh b/hivesterix/hivesterix-dist/src/main/resources/scripts/copylog.sh
new file mode 100644
index 0000000..7767b2d
--- /dev/null
+++ b/hivesterix/hivesterix-dist/src/main/resources/scripts/copylog.sh
@@ -0,0 +1,7 @@
+. conf/cluster.properties
+
+NODEID=`hostname | cut -d '.' -f 1`
+#echo $NODEID
+
+#echo "rsync ${NCLOGS_DIR}/${NODEID}.log ${1}:${2}"
+rsync ${NCLOGS_DIR}/${NODEID}.log ${1}:${2}
diff --git a/hivesterix/hivesterix-dist/src/main/resources/scripts/dumpAll.sh b/hivesterix/hivesterix-dist/src/main/resources/scripts/dumpAll.sh
new file mode 100644
index 0000000..e7d45e8
--- /dev/null
+++ b/hivesterix/hivesterix-dist/src/main/resources/scripts/dumpAll.sh
@@ -0,0 +1,12 @@
+. conf/cluster.properties
+PREGELIX_PATH=`pwd`
+LOG_PATH=$PREGELIX_PATH/logs/
+rm -rf $LOG_PATH
+mkdir $LOG_PATH
+ccname=`hostname`
+
+for i in `cat conf/slaves`
+do
+   ssh $i "cd ${PREGELIX_PATH}; bin/dumptrace.sh; bin/copylog.sh ${ccname} ${LOG_PATH}"
+done
+
diff --git a/hivesterix/hivesterix-dist/src/main/resources/scripts/dumptrace.sh b/hivesterix/hivesterix-dist/src/main/resources/scripts/dumptrace.sh
new file mode 100644
index 0000000..9fe55f0
--- /dev/null
+++ b/hivesterix/hivesterix-dist/src/main/resources/scripts/dumptrace.sh
@@ -0,0 +1,15 @@
+echo `hostname`
+#Kill process
+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
+  USERID=`id | sed 's/^uid=//;s/(.*$//'`
+  PID=`ps -ef|grep ${USERID}|grep java|grep 'Dapp.name=pregelixnc'|awk '{print $2}'`
+fi
+
+echo $PID
+kill -QUIT $PID
diff --git a/hivesterix/hivesterix-dist/src/main/resources/scripts/getip.sh b/hivesterix/hivesterix-dist/src/main/resources/scripts/getip.sh
index d11b091..0e737c5 100755
--- a/hivesterix/hivesterix-dist/src/main/resources/scripts/getip.sh
+++ b/hivesterix/hivesterix-dist/src/main/resources/scripts/getip.sh
@@ -47,10 +47,15 @@
 		IPADDR=`/sbin/ifconfig lo | grep "inet " | awk '{print $2}' | cut -f 2 -d ':'`
         fi 
 else
-        IPADDR=`/sbin/ifconfig en1 | grep "inet " | awk '{print $2}' | cut -f 2 -d ':'`
-	if [ "$IPADDR" = "" ]
+        #Get IP Address
+        IPADDR=`/sbin/ifconfig en0 | grep "inet " | awk '{print $2}' | cut -f 2 -d ':'`
+        if [ "$IPADDR" = "" ]
         then
-                IPADDR=`/sbin/ifconfig lo0 | grep "inet " | awk '{print $2}' | cut -f 2 -d ':'`
+                IPADDR=`/sbin/ifconfig en1 | grep "inet " | awk '{print $2}' | cut -f 2 -d ':'`
+        fi
+        if [ "$IPADDR" = "" ]
+        then
+                IPADDR=`/sbin/ifconfig lo | grep "inet " | awk '{print $2}' | cut -f 2 -d ':'`
         fi
 
 fi
diff --git a/hivesterix/hivesterix-dist/src/main/resources/scripts/hive b/hivesterix/hivesterix-dist/src/main/resources/scripts/hive
index 38a9e33..d2ef909 100755
--- a/hivesterix/hivesterix-dist/src/main/resources/scripts/hive
+++ b/hivesterix/hivesterix-dist/src/main/resources/scripts/hive
@@ -175,13 +175,6 @@
     exit 5
 fi
 
-if [ $hadoop_minor_ver -ne 20 -o $hadoop_patch_ver -eq 0 ]; then
-    echo "Hive requires Hadoop 0.20.x (x >= 1)."
-    echo "'hadoop version' returned:"
-    echo `$HADOOP version`
-    exit 6
-fi
-
 if [ "${AUX_PARAM}" != "" ]; then
   HIVE_OPTS="$HIVE_OPTS -hiveconf hive.aux.jars.path=${AUX_PARAM}"
   AUX_JARS_CMD_LINE="-libjars ${AUX_PARAM}"
diff --git a/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/runtimefunction/RuntimeFunctionTestSuite.java b/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/runtimefunction/RuntimeFunctionTestSuite.java
index b024269..5fdfb3a 100644
--- a/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/runtimefunction/RuntimeFunctionTestSuite.java
+++ b/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/runtimefunction/RuntimeFunctionTestSuite.java
@@ -12,77 +12,77 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.test.runtimefunction;
-
-import java.io.File;
-import java.util.List;
-
-import junit.framework.Test;
-import junit.framework.TestResult;
-import edu.uci.ics.hivesterix.test.base.AbstractTestSuiteClass;
-
-public class RuntimeFunctionTestSuite extends AbstractTestSuiteClass {
-
-    private static final String PATH_TO_QUERIES = "src/test/resources/runtimefunctionts/queries/";
-    private static final String PATH_TO_RESULTS = "src/test/resources/runtimefunctionts/results/";
-    private static final String PATH_TO_IGNORES = "src/test/resources/runtimefunctionts/ignore.txt";
-
-    private static final String FILE_EXTENSION_OF_RESULTS = "result";
-
-    public static Test suite() throws Exception {
-        List<String> ignores = getIgnoreList(PATH_TO_IGNORES);
-        File testData = new File(PATH_TO_QUERIES);
-        File[] queries = testData.listFiles();
-        RuntimeFunctionTestSuite testSuite = new RuntimeFunctionTestSuite();
-
-        // set hdfs and hyracks cluster, and load test data to hdfs
-        try {
-            testSuite.setup();
-            testSuite.loadData();
-        } catch (Exception e) {
-            e.printStackTrace();
-            throw new IllegalStateException(e.getMessage());
-        }
-
-        for (File qFile : queries) {
-            if (isIgnored(qFile.getName(), ignores))
-                continue;
-
-            if (qFile.isFile()) {
-                String resultFileName = hiveExtToResExt(qFile.getName());
-                File rFile = new File(PATH_TO_RESULTS + resultFileName);
-                testSuite.addTest(new RuntimeFunctionTestCase(qFile, rFile));
-            }
-        }
-        return testSuite;
-    }
-
-    private static String hiveExtToResExt(String fname) {
-        int dot = fname.lastIndexOf('.');
-        return fname.substring(0, dot + 1) + FILE_EXTENSION_OF_RESULTS;
-    }
-
-    /**
-     * Runs the tests and collects their result in a TestResult.
-     */
-    @Override
-    public void run(TestResult result) {
-
-        int testCount = countTestCases();
-        for (int i = 0; i < testCount; i++) {
-            Test each = this.testAt(i);
-            if (result.shouldStop())
-                break;
-            runTest(each, result);
-        }
-
-        // cleanup hdfs and hyracks cluster
-        try {
-            cleanup();
-        } catch (Exception e) {
-            e.printStackTrace();
-            throw new IllegalStateException(e.getMessage());
-        }
-    }
-
-}
+package edu.uci.ics.hivesterix.test.runtimefunction;
+
+import java.io.File;
+import java.util.List;
+
+import junit.framework.Test;
+import junit.framework.TestResult;
+import edu.uci.ics.hivesterix.test.base.AbstractTestSuiteClass;
+
+public class RuntimeFunctionTestSuite extends AbstractTestSuiteClass {
+
+    private static final String PATH_TO_QUERIES = "src/test/resources/runtimefunctionts/queries/";
+    private static final String PATH_TO_RESULTS = "src/test/resources/runtimefunctionts/results/";
+    private static final String PATH_TO_IGNORES = "src/test/resources/runtimefunctionts/ignore.txt";
+
+    private static final String FILE_EXTENSION_OF_RESULTS = "result";
+
+    public static Test suite() throws Exception {
+        List<String> ignores = getIgnoreList(PATH_TO_IGNORES);
+        File testData = new File(PATH_TO_QUERIES);
+        File[] queries = testData.listFiles();
+        RuntimeFunctionTestSuite testSuite = new RuntimeFunctionTestSuite();
+
+        // set hdfs and hyracks cluster, and load test data to hdfs
+        try {
+            testSuite.setup();
+            testSuite.loadData();
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new IllegalStateException(e.getMessage());
+        }
+
+        for (File qFile : queries) {
+            if (isIgnored(qFile.getName(), ignores))
+                continue;
+
+            if (qFile.isFile()) {
+                String resultFileName = hiveExtToResExt(qFile.getName());
+                File rFile = new File(PATH_TO_RESULTS + resultFileName);
+                testSuite.addTest(new RuntimeFunctionTestCase(qFile, rFile));
+            }
+        }
+        return testSuite;
+    }
+
+    private static String hiveExtToResExt(String fname) {
+        int dot = fname.lastIndexOf('.');
+        return fname.substring(0, dot + 1) + FILE_EXTENSION_OF_RESULTS;
+    }
+
+    /**
+     * Runs the tests and collects their result in a TestResult.
+     */
+    @Override
+    public void run(TestResult result) {
+
+        int testCount = countTestCases();
+        for (int i = 0; i < testCount; i++) {
+            Test each = this.testAt(i);
+            if (result.shouldStop())
+                break;
+            runTest(each, result);
+        }
+
+        // cleanup hdfs and hyracks cluster
+        try {
+            cleanup();
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new IllegalStateException(e.getMessage());
+        }
+    }
+
+}
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q10_returned_item.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q10_returned_item.hive
index 3f1214a..bb07665 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q10_returned_item.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q10_returned_item.hive
@@ -13,9 +13,6 @@
 -- create the result table
 create table q10_returned_item (c_custkey int, c_name string, revenue double, c_acctbal string, n_name string, c_address string, c_phone string, c_comment string);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1024000000;
-
 -- the query
 insert overwrite table q10_returned_item
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q12_shipping.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q12_shipping.hive
index 062f7b9..ae2fa3a 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q12_shipping.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q12_shipping.hive
@@ -9,8 +9,6 @@
 -- create the result table
 create table q12_shipping(l_shipmode string, high_line_count double, low_line_count double);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1225000000;
 
 -- the query
 insert overwrite table q12_shipping
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q14_promotion_effect.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q14_promotion_effect.hive
index 988f400..4644d23 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q14_promotion_effect.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q14_promotion_effect.hive
@@ -9,9 +9,6 @@
 -- create the result table
 create table q14_promotion_effect(promo_revenue double);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1040000000;
-
 -- the query
 insert overwrite table q14_promotion_effect
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q15_top_supplier.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q15_top_supplier.hive
index 04064ed..8fa333e 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q15_top_supplier.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q15_top_supplier.hive
@@ -14,8 +14,6 @@
 create table q15_top_supplier(s_suppkey int, s_name string, s_address string, s_phone string, total_revenue double);
 
 
-set mapred.min.split.size=536870912;
-
 -- the query
 insert overwrite table revenue
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q18_large_volume_customer.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q18_large_volume_customer.hive
index 76d0475..c617c26 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q18_large_volume_customer.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q18_large_volume_customer.hive
@@ -13,8 +13,6 @@
 create table q18_tmp(l_orderkey int, t_sum_quantity double);
 create table q18_large_volume_customer(c_name string, c_custkey int, o_orderkey int, o_orderdate string, o_totalprice double, sum_quantity double);
 
-set mapred.min.split.size=268435456;
-set hive.exec.reducers.bytes.per.reducer=1164000000;
 
 -- the query
 insert overwrite table q18_tmp
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q19_discounted_revenue.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q19_discounted_revenue.hive
index fd330cd..a7a0a0a 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q19_discounted_revenue.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q19_discounted_revenue.hive
@@ -9,8 +9,6 @@
 -- create the result table
 create table q19_discounted_revenue(revenue double);
 
-set mapred.min.split.size=268435456;
-set hive.exec.reducers.bytes.per.reducer=1040000000;
 
 -- the query
 insert overwrite table q19_discounted_revenue
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q1_pricing_summary_report.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q1_pricing_summary_report.hive
index a002068..af64a4f 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q1_pricing_summary_report.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q1_pricing_summary_report.hive
@@ -7,8 +7,6 @@
 -- create the target table
 CREATE TABLE q1_pricing_summary_report ( L_RETURNFLAG STRING, L_LINESTATUS STRING, SUM_QTY DOUBLE, SUM_BASE_PRICE DOUBLE, SUM_DISC_PRICE DOUBLE, SUM_CHARGE DOUBLE, AVE_QTY DOUBLE, AVE_PRICE DOUBLE, AVE_DISC DOUBLE, COUNT_ORDER INT);
 
-set mapred.min.split.size=536870912;
-
 -- the query
 INSERT OVERWRITE TABLE q1_pricing_summary_report 
 SELECT 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q20_potential_part_promotion.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q20_potential_part_promotion.hive
index 63297e6..3149962 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q20_potential_part_promotion.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q20_potential_part_promotion.hive
@@ -22,7 +22,6 @@
 create table q20_tmp4(ps_suppkey int);
 create table q20_potential_part_promotion(s_name string, s_address string);
 
-set mapred.min.split.size=536870912;
 
 -- the query
 insert overwrite table q20_tmp1
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q3_shipping_priority.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q3_shipping_priority.hive
index 0049eb3..67f6dc4 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q3_shipping_priority.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q3_shipping_priority.hive
@@ -11,9 +11,6 @@
 -- create the target table
 create table q3_shipping_priority (l_orderkey int, revenue double, o_orderdate string, o_shippriority int);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1024000000;
-
 -- the query
 Insert overwrite table q3_shipping_priority 
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q4_order_priority.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q4_order_priority.hive
index aa828e9..efbcff2 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q4_order_priority.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q4_order_priority.hive
@@ -11,7 +11,6 @@
 CREATE TABLE q4_order_priority_tmp (O_ORDERKEY INT);
 CREATE TABLE q4_order_priority (O_ORDERPRIORITY STRING, ORDER_COUNT INT);
 
-set mapred.min.split.size=536870912;
 -- the query
 INSERT OVERWRITE TABLE q4_order_priority_tmp 
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q5_local_supplier_volume.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q5_local_supplier_volume.hive
index a975ce1..091f000 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q5_local_supplier_volume.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q5_local_supplier_volume.hive
@@ -17,7 +17,6 @@
 -- create the target table
 create table q5_local_supplier_volume (N_NAME STRING, REVENUE DOUBLE);
 
-set mapred.min.split.size=536870912;
 
 -- the query
 insert overwrite table q5_local_supplier_volume 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q7_volume_shipping.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q7_volume_shipping.hive
index 3dfb22a..444644f 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q7_volume_shipping.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q7_volume_shipping.hive
@@ -17,8 +17,6 @@
 create table q7_volume_shipping (supp_nation string, cust_nation string, l_year int, revenue double);
 create table q7_volume_shipping_tmp(supp_nation string, cust_nation string, s_nationkey int, c_nationkey int);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1225000000;
 
 -- the query
 insert overwrite table q7_volume_shipping_tmp
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q9_product_type_profit.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q9_product_type_profit.hive
index 586779c..a9bb58b 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q9_product_type_profit.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q9_product_type_profit.hive
@@ -17,8 +17,6 @@
 -- create the result table
 create table q9_product_type_profit (nation string, o_year string, sum_profit double);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1024000000;
 
 -- the query
 insert overwrite table q9_product_type_profit
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/u7_multi_join.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/u7_multi_join.hive
index 2891c56..70b3538 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/u7_multi_join.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/u7_multi_join.hive
@@ -6,4 +6,7 @@
 create external table orders (O_ORDERKEY INT, O_CUSTKEY INT, O_ORDERSTATUS STRING, O_TOTALPRICE DOUBLE, O_ORDERDATE STRING, O_ORDERPRIORITY STRING, O_CLERK STRING, O_SHIPPRIORITY INT, O_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION '/tpch/orders';
 create external table customer (C_CUSTKEY INT, C_NAME STRING, C_ADDRESS STRING, C_NATIONKEY INT, C_PHONE STRING, C_ACCTBAL DOUBLE, C_MKTSEGMENT STRING, C_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION '/tpch/customer';
 
-select l_linenumber, o_orderkey, o_totalprice, o_orderdate, o_shippriority from  customer c join orders o  on c.c_custkey = o.o_custkey join lineitem l    on o.o_orderkey = l.l_orderkey  where c.c_custkey<5 and o.o_totalprice<30000;
+select l_linenumber, o_orderkey, o_totalprice, o_orderdate, o_shippriority from 
+ customer c join orders o  on c.c_custkey = o.o_custkey 
+ join lineitem l    on o.o_orderkey = l.l_orderkey  
+ where c.c_custkey<5 and o.o_totalprice<30000;
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q10_returned_item.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q10_returned_item.plan
index 05b3718..bda1113 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q10_returned_item.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q10_returned_item.plan
@@ -1,5 +1,5 @@
 write [%0->$$38, %0->$$39, %0->$$45, %0->$$40, %0->$$42, %0->$$43, %0->$$41, %0->$$44]
--- SINK_WRITE  |UNPARTITIONED|
+-- SINK_WRITE  |PARTITIONED|
   project ([$$38, $$39, $$45, $$40, $$42, $$43, $$41, $$44])
   -- STREAM_PROJECT  |PARTITIONED|
     limit 20
@@ -9,11 +9,11 @@
         exchange 
         -- SORT_MERGE_EXCHANGE [$$45(DESC) ]  |PARTITIONED|
           limit 20
-          -- STREAM_LIMIT  |LOCAL|
+          -- STREAM_LIMIT  |PARTITIONED|
             exchange 
-            -- ONE_TO_ONE_EXCHANGE  |LOCAL|
+            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
               order (DESC, %0->$$45) 
-              -- STABLE_SORT [$$45(DESC)]  |LOCAL|
+              -- STABLE_SORT [$$45(DESC)]  |PARTITIONED|
                 exchange 
                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                   group by ([$$38 := %0->$$48; $$39 := %0->$$49; $$40 := %0->$$50; $$41 := %0->$$51; $$42 := %0->$$52; $$43 := %0->$$53; $$44 := %0->$$54]) decor ([]) {
@@ -31,7 +31,7 @@
                                   nested tuple source
                                   -- NESTED_TUPLE_SOURCE  |LOCAL|
                              }
-                      -- EXTERNAL_GROUP_BY[$$21, $$22, $$26, $$25, $$18, $$23, $$28]  |LOCAL|
+                      -- EXTERNAL_GROUP_BY[$$21, $$22, $$26, $$25, $$18, $$23, $$28]  |PARTITIONED|
                         exchange 
                         -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                           project ([$$21, $$22, $$23, $$25, $$26, $$28, $$18, $$6, $$7])
@@ -82,7 +82,7 @@
                                                 -- HASH_PARTITION_EXCHANGE [$$30]  |PARTITIONED|
                                                   project ([$$30, $$29])
                                                   -- STREAM_PROJECT  |PARTITIONED|
-                                                    select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$33, 1994-01-01], function-call: algebricks:ge, Args:[%0->$$33, 1993-10-01], function-call: algebricks:lt, Args:[%0->$$33, 1994-01-01]])
+                                                    select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$33, 1993-10-01], function-call: algebricks:lt, Args:[%0->$$33, 1994-01-01]])
                                                     -- STREAM_SELECT  |PARTITIONED|
                                                       exchange 
                                                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -99,4 +99,4 @@
                                                     exchange 
                                                     -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                                       empty-tuple-source
-                                                      -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                                      -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q11_important_stock.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q11_important_stock.plan
index 70ad7ee..8195ef0 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q11_important_stock.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q11_important_stock.plan
@@ -19,7 +19,7 @@
                       nested tuple source
                       -- NESTED_TUPLE_SOURCE  |LOCAL|
                  }
-          -- EXTERNAL_GROUP_BY[$$1]  |LOCAL|
+          -- EXTERNAL_GROUP_BY[$$1]  |PARTITIONED|
             exchange 
             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
               project ([$$1, $$3, $$4])
@@ -85,7 +85,7 @@
                     nested tuple source
                     -- NESTED_TUPLE_SOURCE  |LOCAL|
                }
-        -- EXTERNAL_GROUP_BY[]  |LOCAL|
+        -- EXTERNAL_GROUP_BY[]  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             data-scan [$$2]<-[$$1, $$2] <- default.q11_part_tmp
@@ -99,7 +99,7 @@
   exchange 
   -- SORT_MERGE_EXCHANGE [$$3(DESC) ]  |PARTITIONED|
     order (DESC, %0->$$3) 
-    -- STABLE_SORT [$$3(DESC)]  |LOCAL|
+    -- STABLE_SORT [$$3(DESC)]  |PARTITIONED|
       exchange 
       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
         project ([$$2, $$3])
@@ -123,4 +123,4 @@
                   exchange 
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                     empty-tuple-source
-                    -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                    -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q12_shipping.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q12_shipping.plan
index 5c240e2..d976bba 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q12_shipping.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q12_shipping.plan
@@ -7,7 +7,7 @@
       exchange 
       -- SORT_MERGE_EXCHANGE [$$26(ASC) ]  |PARTITIONED|
         order (ASC, %0->$$26) 
-        -- STABLE_SORT [$$26(ASC)]  |LOCAL|
+        -- STABLE_SORT [$$26(ASC)]  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             group by ([$$26 := %0->$$34]) decor ([]) {
@@ -25,7 +25,7 @@
                             nested tuple source
                             -- NESTED_TUPLE_SOURCE  |LOCAL|
                        }
-                -- EXTERNAL_GROUP_BY[$$24]  |LOCAL|
+                -- EXTERNAL_GROUP_BY[$$24]  |PARTITIONED|
                   exchange 
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                     project ([$$6, $$24])
@@ -38,7 +38,7 @@
                           -- HASH_PARTITION_EXCHANGE [$$10]  |PARTITIONED|
                             project ([$$10, $$24])
                             -- STREAM_PROJECT  |PARTITIONED|
-                              select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$22, 1995-01-01], function-call: algebricks:ge, Args:[%0->$$22, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$20, %0->$$21], function-call: algebricks:lt, Args:[%0->$$21, %0->$$22], function-call: algebricks:lt, Args:[%0->$$20, %0->$$21], function-call: algebricks:ge, Args:[%0->$$22, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$22, 1995-01-01], function-call: algebricks:or, Args:[function-call: algebricks:eq, Args:[%0->$$24, MAIL], function-call: algebricks:eq, Args:[%0->$$24, SHIP]], function-call: algebricks:or, Args:[function-call: algebricks:eq, Args:[%0->$$24, MAIL], function-call: algebricks:eq, Args:[%0->$$24, SHIP]]])
+                              select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$21, %0->$$22], function-call: algebricks:lt, Args:[%0->$$20, %0->$$21], function-call: algebricks:ge, Args:[%0->$$22, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$22, 1995-01-01], function-call: algebricks:or, Args:[function-call: algebricks:eq, Args:[%0->$$24, MAIL], function-call: algebricks:eq, Args:[%0->$$24, SHIP]]])
                               -- STREAM_SELECT  |PARTITIONED|
                                 exchange 
                                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -55,4 +55,4 @@
                               exchange 
                               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                 empty-tuple-source
-                                -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q13_customer_distribution.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q13_customer_distribution.plan
index 19bcd24..40cedd6 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q13_customer_distribution.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q13_customer_distribution.plan
@@ -7,74 +7,65 @@
       exchange 
       -- SORT_MERGE_EXCHANGE [$$21(DESC), $$20(DESC) ]  |PARTITIONED|
         order (DESC, %0->$$21) (DESC, %0->$$20) 
-        -- STABLE_SORT [$$21(DESC), $$20(DESC)]  |LOCAL|
+        -- STABLE_SORT [$$21(DESC), $$20(DESC)]  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-            group by ([$$20 := %0->$$28]) decor ([]) {
-                      aggregate [$$21] <- [function-call: hive:count(FINAL), Args:[%0->$$27]]
+            group by ([$$20 := %0->$$26]) decor ([]) {
+                      aggregate [$$21] <- [function-call: hive:count(FINAL), Args:[%0->$$25]]
                       -- AGGREGATE  |LOCAL|
                         nested tuple source
                         -- NESTED_TUPLE_SOURCE  |LOCAL|
                    }
-            -- EXTERNAL_GROUP_BY[$$28]  |PARTITIONED|
+            -- EXTERNAL_GROUP_BY[$$26]  |PARTITIONED|
               exchange 
-              -- HASH_PARTITION_EXCHANGE [$$28]  |PARTITIONED|
-                group by ([$$28 := %0->$$19]) decor ([]) {
-                          aggregate [$$27] <- [function-call: hive:count(PARTIAL1), Args:[1]]
+              -- HASH_PARTITION_EXCHANGE [$$26]  |PARTITIONED|
+                group by ([$$26 := %0->$$19]) decor ([]) {
+                          aggregate [$$25] <- [function-call: hive:count(PARTIAL1), Args:[1]]
                           -- AGGREGATE  |LOCAL|
                             nested tuple source
                             -- NESTED_TUPLE_SOURCE  |LOCAL|
                        }
-                -- EXTERNAL_GROUP_BY[$$19]  |LOCAL|
+                -- EXTERNAL_GROUP_BY[$$19]  |PARTITIONED|
                   exchange 
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                     project ([$$19])
                     -- STREAM_PROJECT  |PARTITIONED|
                       exchange 
                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                        group by ([$$18 := %0->$$26]) decor ([]) {
-                                  aggregate [$$19] <- [function-call: hive:count(FINAL), Args:[%0->$$25]]
+                        group by ([$$18 := %0->$$10]) decor ([]) {
+                                  aggregate [$$19] <- [function-call: hive:count(COMPLETE), Args:[%0->$$1]]
                                   -- AGGREGATE  |LOCAL|
                                     nested tuple source
                                     -- NESTED_TUPLE_SOURCE  |LOCAL|
                                }
-                        -- EXTERNAL_GROUP_BY[$$26]  |PARTITIONED|
+                        -- EXTERNAL_GROUP_BY[$$10]  |PARTITIONED|
                           exchange 
-                          -- HASH_PARTITION_EXCHANGE [$$26]  |PARTITIONED|
-                            group by ([$$26 := %0->$$10]) decor ([]) {
-                                      aggregate [$$25] <- [function-call: hive:count(PARTIAL1), Args:[%0->$$1]]
-                                      -- AGGREGATE  |LOCAL|
-                                        nested tuple source
-                                        -- NESTED_TUPLE_SOURCE  |LOCAL|
-                                   }
-                            -- EXTERNAL_GROUP_BY[$$10]  |LOCAL|
+                          -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                            project ([$$10, $$1])
+                            -- STREAM_PROJECT  |PARTITIONED|
                               exchange 
                               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                project ([$$10, $$1])
-                                -- STREAM_PROJECT  |PARTITIONED|
+                                left outer join (function-call: algebricks:eq, Args:[%0->$$2, %0->$$10])
+                                -- HYBRID_HASH_JOIN [$$10][$$2]  |PARTITIONED|
                                   exchange 
-                                  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                    left outer join (function-call: algebricks:eq, Args:[%0->$$2, %0->$$10])
-                                    -- HYBRID_HASH_JOIN [$$10][$$2]  |PARTITIONED|
+                                  -- HASH_PARTITION_EXCHANGE [$$10]  |PARTITIONED|
+                                    data-scan [$$10]<-[$$10, $$11, $$12, $$13, $$14, $$15, $$16, $$17] <- default.customer
+                                    -- DATASOURCE_SCAN  |PARTITIONED|
                                       exchange 
-                                      -- HASH_PARTITION_EXCHANGE [$$10]  |PARTITIONED|
-                                        data-scan [$$10]<-[$$10, $$11, $$12, $$13, $$14, $$15, $$16, $$17] <- default.customer
-                                        -- DATASOURCE_SCAN  |PARTITIONED|
-                                          exchange 
-                                          -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                            empty-tuple-source
-                                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
-                                      exchange 
-                                      -- HASH_PARTITION_EXCHANGE [$$2]  |PARTITIONED|
-                                        project ([$$2, $$1])
-                                        -- STREAM_PROJECT  |PARTITIONED|
-                                          select (function-call: algebricks:not, Args:[function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$9, %special%requests%]])
-                                          -- STREAM_SELECT  |PARTITIONED|
+                                      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                        empty-tuple-source
+                                        -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                  exchange 
+                                  -- HASH_PARTITION_EXCHANGE [$$2]  |PARTITIONED|
+                                    project ([$$2, $$1])
+                                    -- STREAM_PROJECT  |PARTITIONED|
+                                      select (function-call: algebricks:not, Args:[function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$9, %special%requests%]])
+                                      -- STREAM_SELECT  |PARTITIONED|
+                                        exchange 
+                                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                          data-scan [$$1, $$2, $$9]<-[$$1, $$2, $$3, $$4, $$5, $$6, $$7, $$8, $$9] <- default.orders
+                                          -- DATASOURCE_SCAN  |PARTITIONED|
                                             exchange 
                                             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                              data-scan [$$1, $$2, $$9]<-[$$1, $$2, $$3, $$4, $$5, $$6, $$7, $$8, $$9] <- default.orders
-                                              -- DATASOURCE_SCAN  |PARTITIONED|
-                                                exchange 
-                                                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                                  empty-tuple-source
-                                                  -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                              empty-tuple-source
+                                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q14_promotion_effect.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q14_promotion_effect.plan
index 21b90bd..e6d1c1d 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q14_promotion_effect.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q14_promotion_effect.plan
@@ -21,7 +21,7 @@
                         nested tuple source
                         -- NESTED_TUPLE_SOURCE  |LOCAL|
                    }
-            -- EXTERNAL_GROUP_BY[]  |LOCAL|
+            -- EXTERNAL_GROUP_BY[]  |PARTITIONED|
               exchange 
               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                 project ([$$5, $$15, $$16])
@@ -34,7 +34,7 @@
                       -- HASH_PARTITION_EXCHANGE [$$11]  |PARTITIONED|
                         project ([$$11, $$15, $$16])
                         -- STREAM_PROJECT  |PARTITIONED|
-                          select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$20, 1995-10-01], function-call: algebricks:ge, Args:[%0->$$20, 1995-09-01], function-call: algebricks:lt, Args:[%0->$$20, 1995-10-01]])
+                          select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$20, 1995-09-01], function-call: algebricks:lt, Args:[%0->$$20, 1995-10-01]])
                           -- STREAM_SELECT  |PARTITIONED|
                             exchange 
                             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -51,4 +51,4 @@
                           exchange 
                           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                             empty-tuple-source
-                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q15_top_supplier.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q15_top_supplier.plan
index a5bd27a..c61ed37 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q15_top_supplier.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q15_top_supplier.plan
@@ -19,12 +19,12 @@
                       nested tuple source
                       -- NESTED_TUPLE_SOURCE  |LOCAL|
                  }
-          -- EXTERNAL_GROUP_BY[$$3]  |LOCAL|
+          -- EXTERNAL_GROUP_BY[$$3]  |PARTITIONED|
             exchange 
             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
               project ([$$3, $$6, $$7])
               -- STREAM_PROJECT  |PARTITIONED|
-                select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$11, 1996-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1996-04-01], function-call: algebricks:ge, Args:[%0->$$11, 1996-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1996-04-01]])
+                select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$11, 1996-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1996-04-01]])
                 -- STREAM_SELECT  |PARTITIONED|
                   exchange 
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -53,7 +53,7 @@
                     nested tuple source
                     -- NESTED_TUPLE_SOURCE  |LOCAL|
                }
-        -- PRE_CLUSTERED_GROUP_BY[]  |LOCAL|
+        -- PRE_CLUSTERED_GROUP_BY[]  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             data-scan [$$2]<-[$$1, $$2] <- default.revenue
@@ -67,7 +67,7 @@
   exchange 
   -- SORT_MERGE_EXCHANGE [$$2(ASC) ]  |PARTITIONED|
     order (ASC, %0->$$2) 
-    -- STABLE_SORT [$$2(ASC)]  |LOCAL|
+    -- STABLE_SORT [$$2(ASC)]  |PARTITIONED|
       exchange 
       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
         project ([$$2, $$3, $$4, $$6, $$10])
@@ -107,4 +107,4 @@
                           exchange 
                           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                             empty-tuple-source
-                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q16_parts_supplier_relationship.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q16_parts_supplier_relationship.plan
index 9835346..c986cb4 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q16_parts_supplier_relationship.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q16_parts_supplier_relationship.plan
@@ -38,7 +38,7 @@
               -- HYBRID_HASH_JOIN [$$2][$$11]  |PARTITIONED|
                 exchange 
                 -- HASH_PARTITION_EXCHANGE [$$2]  |PARTITIONED|
-                  select (function-call: algebricks:and, Args:[function-call: algebricks:not, Args:[function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$6, MEDIUM POLISHED%]], function-call: algebricks:neq, Args:[%0->$$5, Brand#45], function-call: algebricks:not, Args:[function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$6, MEDIUM POLISHED%]]])
+                  select (function-call: algebricks:and, Args:[function-call: algebricks:neq, Args:[%0->$$5, Brand#45], function-call: algebricks:not, Args:[function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$6, MEDIUM POLISHED%]]])
                   -- STREAM_SELECT  |PARTITIONED|
                     exchange 
                     -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -65,7 +65,7 @@
       exchange 
       -- SORT_MERGE_EXCHANGE [$$13(DESC), $$10(ASC), $$11(ASC), $$12(ASC) ]  |PARTITIONED|
         order (DESC, %0->$$13) (ASC, %0->$$10) (ASC, %0->$$11) (ASC, %0->$$12) 
-        -- STABLE_SORT [$$13(DESC), $$10(ASC), $$11(ASC), $$12(ASC)]  |LOCAL|
+        -- STABLE_SORT [$$13(DESC), $$10(ASC), $$11(ASC), $$12(ASC)]  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             group by ([$$10 := %0->$$5; $$11 := %0->$$6; $$12 := %0->$$7]) decor ([]) {
@@ -95,4 +95,4 @@
                           exchange 
                           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                             empty-tuple-source
-                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q17_small_quantity_order_revenue.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q17_small_quantity_order_revenue.plan
index a827007..8a75f64 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q17_small_quantity_order_revenue.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q17_small_quantity_order_revenue.plan
@@ -21,7 +21,7 @@
                         nested tuple source
                         -- NESTED_TUPLE_SOURCE  |LOCAL|
                    }
-            -- EXTERNAL_GROUP_BY[$$2]  |LOCAL|
+            -- EXTERNAL_GROUP_BY[$$2]  |PARTITIONED|
               exchange 
               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                 data-scan [$$2, $$5]<-[$$1, $$2, $$3, $$4, $$5, $$6, $$7, $$8, $$9, $$10, $$11, $$12, $$13, $$14, $$15, $$16] <- default.lineitem
@@ -53,13 +53,13 @@
                         nested tuple source
                         -- NESTED_TUPLE_SOURCE  |LOCAL|
                    }
-            -- EXTERNAL_GROUP_BY[]  |LOCAL|
+            -- EXTERNAL_GROUP_BY[]  |PARTITIONED|
               exchange 
               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                 project ([$$17])
                 -- STREAM_PROJECT  |PARTITIONED|
                   select (function-call: algebricks:lt, Args:[%0->$$16, %0->$$2])
-                  -- STREAM_SELECT  |UNPARTITIONED|
+                  -- STREAM_SELECT  |PARTITIONED|
                     exchange 
                     -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                       join (function-call: algebricks:eq, Args:[%0->$$13, %0->$$1])
@@ -84,7 +84,7 @@
                                 -- HASH_PARTITION_EXCHANGE [$$3]  |PARTITIONED|
                                   project ([$$3])
                                   -- STREAM_PROJECT  |PARTITIONED|
-                                    select (function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$9, MED BOX], function-call: algebricks:eq, Args:[%0->$$6, Brand#23], function-call: algebricks:eq, Args:[%0->$$9, MED BOX]])
+                                    select (function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$6, Brand#23], function-call: algebricks:eq, Args:[%0->$$9, MED BOX]])
                                     -- STREAM_SELECT  |PARTITIONED|
                                       exchange 
                                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -101,4 +101,4 @@
                             exchange 
                             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                               empty-tuple-source
-                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q18_large_volume_customer.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q18_large_volume_customer.plan
index ea47ea0..eb78f1d 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q18_large_volume_customer.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q18_large_volume_customer.plan
@@ -19,7 +19,7 @@
                       nested tuple source
                       -- NESTED_TUPLE_SOURCE  |LOCAL|
                  }
-          -- EXTERNAL_GROUP_BY[$$1]  |LOCAL|
+          -- EXTERNAL_GROUP_BY[$$1]  |PARTITIONED|
             exchange 
             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
               data-scan [$$1, $$5]<-[$$1, $$2, $$3, $$4, $$5, $$6, $$7, $$8, $$9, $$10, $$11, $$12, $$13, $$14, $$15, $$16] <- default.lineitem
@@ -29,7 +29,7 @@
                   empty-tuple-source
                   -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
 write [%0->$$36, %0->$$37, %0->$$38, %0->$$39, %0->$$40, %0->$$41]
--- SINK_WRITE  |UNPARTITIONED|
+-- SINK_WRITE  |PARTITIONED|
   project ([$$36, $$37, $$38, $$39, $$40, $$41])
   -- STREAM_PROJECT  |PARTITIONED|
     limit 100
@@ -39,11 +39,11 @@
         exchange 
         -- SORT_MERGE_EXCHANGE [$$40(DESC), $$39(ASC) ]  |PARTITIONED|
           limit 100
-          -- STREAM_LIMIT  |LOCAL|
+          -- STREAM_LIMIT  |PARTITIONED|
             exchange 
-            -- ONE_TO_ONE_EXCHANGE  |LOCAL|
+            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
               order (DESC, %0->$$40) (ASC, %0->$$39) 
-              -- STABLE_SORT [$$40(DESC), $$39(ASC)]  |LOCAL|
+              -- STABLE_SORT [$$40(DESC), $$39(ASC)]  |PARTITIONED|
                 exchange 
                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                   group by ([$$36 := %0->$$44; $$37 := %0->$$45; $$38 := %0->$$46; $$39 := %0->$$47; $$40 := %0->$$48]) decor ([]) {
@@ -61,7 +61,7 @@
                                   nested tuple source
                                   -- NESTED_TUPLE_SOURCE  |LOCAL|
                              }
-                      -- EXTERNAL_GROUP_BY[$$20, $$19, $$27, $$31, $$30]  |LOCAL|
+                      -- EXTERNAL_GROUP_BY[$$20, $$19, $$27, $$31, $$30]  |PARTITIONED|
                         exchange 
                         -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                           project ([$$19, $$20, $$27, $$30, $$31, $$7])
@@ -90,7 +90,7 @@
                                         -- HASH_PARTITION_EXCHANGE [$$1]  |PARTITIONED|
                                           project ([$$1])
                                           -- STREAM_PROJECT  |PARTITIONED|
-                                            select (function-call: algebricks:gt, Args:[%0->$$2, 300])
+                                            select (function-call: algebricks:gt, Args:[%0->$$2, 300.0])
                                             -- STREAM_SELECT  |PARTITIONED|
                                               exchange 
                                               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -123,4 +123,4 @@
                                             exchange 
                                             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                               empty-tuple-source
-                                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q19_discounted_revenue.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q19_discounted_revenue.plan
index 1827729..9e97b7a 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q19_discounted_revenue.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q19_discounted_revenue.plan
@@ -17,13 +17,13 @@
                     nested tuple source
                     -- NESTED_TUPLE_SOURCE  |LOCAL|
                }
-        -- EXTERNAL_GROUP_BY[]  |LOCAL|
+        -- EXTERNAL_GROUP_BY[]  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             project ([$$15, $$16])
             -- STREAM_PROJECT  |PARTITIONED|
-              select (function-call: algebricks:or, Args:[function-call: algebricks:or, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$4, Brand#12], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$7, SM CASE||SM BOX||SM PACK||SM PKG]], function-call: algebricks:ge, Args:[%0->$$14, 1]], function-call: algebricks:le, Args:[%0->$$14, 11]], function-call: algebricks:ge, Args:[%0->$$6, 1]], function-call: algebricks:le, Args:[%0->$$6, 5]], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$24, AIR||AIR REG]], function-call: algebricks:eq, Args:[%0->$$23, DELIVER IN PERSON]], function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$4, Brand#23], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$7, MED BAG||MED BOX||MED PKG||MED PACK]], function-call: algebricks:ge, Args:[%0->$$14, 10]], function-call: algebricks:le, Args:[%0->$$14, 20]], function-call: algebricks:ge, Args:[%0->$$6, 1]], function-call: algebricks:le, Args:[%0->$$6, 10]], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$24, AIR||AIR REG]], function-call: algebricks:eq, Args:[%0->$$23, DELIVER IN PERSON]]], function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$4, Brand#34], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$7, LG CASE||LG BOX||LG PACK||LG PKG]], function-call: algebricks:ge, Args:[%0->$$14, 20]], function-call: algebricks:le, Args:[%0->$$14, 30]], function-call: algebricks:ge, Args:[%0->$$6, 1]], function-call: algebricks:le, Args:[%0->$$6, 15]], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$24, AIR||AIR REG]], function-call: algebricks:eq, Args:[%0->$$23, DELIVER IN PERSON]]])
-              -- STREAM_SELECT  |UNPARTITIONED|
+              select (function-call: algebricks:or, Args:[function-call: algebricks:or, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$4, Brand#12], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$7, SM CASE||SM BOX||SM PACK||SM PKG]], function-call: algebricks:ge, Args:[%0->$$14, 1.0]], function-call: algebricks:le, Args:[%0->$$14, 11.0]], function-call: algebricks:ge, Args:[%0->$$6, 1]], function-call: algebricks:le, Args:[%0->$$6, 5]], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$24, AIR||AIR REG]], function-call: algebricks:eq, Args:[%0->$$23, DELIVER IN PERSON]], function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$4, Brand#23], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$7, MED BAG||MED BOX||MED PKG||MED PACK]], function-call: algebricks:ge, Args:[%0->$$14, 10.0]], function-call: algebricks:le, Args:[%0->$$14, 20.0]], function-call: algebricks:ge, Args:[%0->$$6, 1]], function-call: algebricks:le, Args:[%0->$$6, 10]], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$24, AIR||AIR REG]], function-call: algebricks:eq, Args:[%0->$$23, DELIVER IN PERSON]]], function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$4, Brand#34], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$7, LG CASE||LG BOX||LG PACK||LG PKG]], function-call: algebricks:ge, Args:[%0->$$14, 20.0]], function-call: algebricks:le, Args:[%0->$$14, 30.0]], function-call: algebricks:ge, Args:[%0->$$6, 1]], function-call: algebricks:le, Args:[%0->$$6, 15]], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$24, AIR||AIR REG]], function-call: algebricks:eq, Args:[%0->$$23, DELIVER IN PERSON]]])
+              -- STREAM_SELECT  |PARTITIONED|
                 exchange 
                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                   join (function-call: algebricks:eq, Args:[%0->$$11, %0->$$1])
@@ -43,4 +43,4 @@
                         exchange 
                         -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                           empty-tuple-source
-                          -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                          -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q1_pricing_summary_report.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q1_pricing_summary_report.plan
index 0e9c90f..de964ac 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q1_pricing_summary_report.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q1_pricing_summary_report.plan
@@ -7,7 +7,7 @@
       exchange 
       -- SORT_MERGE_EXCHANGE [$$17(ASC), $$18(ASC) ]  |PARTITIONED|
         order (ASC, %0->$$17) (ASC, %0->$$18) 
-        -- STABLE_SORT [$$17(ASC), $$18(ASC)]  |LOCAL|
+        -- STABLE_SORT [$$17(ASC), $$18(ASC)]  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             group by ([$$17 := %0->$$37; $$18 := %0->$$38]) decor ([]) {
@@ -25,7 +25,7 @@
                             nested tuple source
                             -- NESTED_TUPLE_SOURCE  |LOCAL|
                        }
-                -- EXTERNAL_GROUP_BY[$$9, $$10]  |LOCAL|
+                -- EXTERNAL_GROUP_BY[$$9, $$10]  |PARTITIONED|
                   exchange 
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                     project ([$$9, $$10, $$5, $$6, $$7, $$8])
@@ -39,4 +39,4 @@
                             exchange 
                             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                               empty-tuple-source
-                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q20_potential_part_promotion.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q20_potential_part_promotion.plan
index eddfca5..ded599c 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q20_potential_part_promotion.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q20_potential_part_promotion.plan
@@ -5,9 +5,9 @@
     distinct ([%0->$$1])
     -- PRE_SORTED_DISTINCT_BY  |PARTITIONED|
       exchange 
-      -- ONE_TO_ONE_EXCHANGE  |LOCAL|
+      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
         order (ASC, %0->$$1) 
-        -- STABLE_SORT [$$1(ASC)]  |LOCAL|
+        -- STABLE_SORT [$$1(ASC)]  |PARTITIONED|
           exchange 
           -- HASH_PARTITION_EXCHANGE [$$1]  |PARTITIONED|
             project ([$$1])
@@ -45,12 +45,12 @@
                         nested tuple source
                         -- NESTED_TUPLE_SOURCE  |LOCAL|
                    }
-            -- EXTERNAL_GROUP_BY[$$2, $$3]  |LOCAL|
+            -- EXTERNAL_GROUP_BY[$$2, $$3]  |PARTITIONED|
               exchange 
               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                 project ([$$2, $$3, $$5])
                 -- STREAM_PROJECT  |PARTITIONED|
-                  select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$11, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1995-01-01], function-call: algebricks:ge, Args:[%0->$$11, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1995-01-01]])
+                  select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$11, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1995-01-01]])
                   -- STREAM_SELECT  |PARTITIONED|
                     exchange 
                     -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -107,9 +107,9 @@
     distinct ([%0->$$1])
     -- PRE_SORTED_DISTINCT_BY  |PARTITIONED|
       exchange 
-      -- ONE_TO_ONE_EXCHANGE  |LOCAL|
+      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
         order (ASC, %0->$$1) 
-        -- STABLE_SORT [$$1(ASC)]  |LOCAL|
+        -- STABLE_SORT [$$1(ASC)]  |PARTITIONED|
           exchange 
           -- HASH_PARTITION_EXCHANGE [$$1]  |PARTITIONED|
             project ([$$1])
@@ -129,7 +129,7 @@
   exchange 
   -- SORT_MERGE_EXCHANGE [$$3(ASC) ]  |PARTITIONED|
     order (ASC, %0->$$3) 
-    -- STABLE_SORT [$$3(ASC)]  |LOCAL|
+    -- STABLE_SORT [$$3(ASC)]  |PARTITIONED|
       exchange 
       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
         project ([$$3, $$4])
@@ -175,4 +175,4 @@
                           exchange 
                           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                             empty-tuple-source
-                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q21_suppliers_who_kept_orders_waiting.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q21_suppliers_who_kept_orders_waiting.plan
index cc47cf3..a22bf53 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q21_suppliers_who_kept_orders_waiting.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q21_suppliers_who_kept_orders_waiting.plan
@@ -23,9 +23,9 @@
                    }
             -- PRE_CLUSTERED_GROUP_BY[$$1, $$3]  |PARTITIONED|
               exchange 
-              -- ONE_TO_ONE_EXCHANGE  |LOCAL|
+              -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                 order (ASC, %0->$$1) (ASC, %0->$$3) 
-                -- STABLE_SORT [$$1(ASC), $$3(ASC)]  |LOCAL|
+                -- STABLE_SORT [$$1(ASC), $$3(ASC)]  |PARTITIONED|
                   exchange 
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                     data-scan [$$1, $$3]<-[$$1, $$2, $$3, $$4, $$5, $$6, $$7, $$8, $$9, $$10, $$11, $$12, $$13, $$14, $$15, $$16] <- default.lineitem
@@ -59,9 +59,9 @@
                    }
             -- PRE_CLUSTERED_GROUP_BY[$$1, $$3]  |PARTITIONED|
               exchange 
-              -- ONE_TO_ONE_EXCHANGE  |LOCAL|
+              -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                 order (ASC, %0->$$1) (ASC, %0->$$3) 
-                -- STABLE_SORT [$$1(ASC), $$3(ASC)]  |LOCAL|
+                -- STABLE_SORT [$$1(ASC), $$3(ASC)]  |PARTITIONED|
                   exchange 
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                     project ([$$1, $$3])
@@ -89,11 +89,11 @@
           exchange 
           -- SORT_MERGE_EXCHANGE [$$44(DESC), $$43(ASC) ]  |PARTITIONED|
             limit 100
-            -- STREAM_LIMIT  |LOCAL|
+            -- STREAM_LIMIT  |PARTITIONED|
               exchange 
-              -- ONE_TO_ONE_EXCHANGE  |LOCAL|
+              -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                 order (DESC, %0->$$44) (ASC, %0->$$43) 
-                -- STABLE_SORT [$$44(DESC), $$43(ASC)]  |LOCAL|
+                -- STABLE_SORT [$$44(DESC), $$43(ASC)]  |PARTITIONED|
                   exchange 
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                     group by ([$$43 := %0->$$48]) decor ([]) {
@@ -111,7 +111,7 @@
                                     nested tuple source
                                     -- NESTED_TUPLE_SOURCE  |LOCAL|
                                }
-                        -- EXTERNAL_GROUP_BY[$$37]  |LOCAL|
+                        -- EXTERNAL_GROUP_BY[$$37]  |PARTITIONED|
                           exchange 
                           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                             project ([$$37])
@@ -127,7 +127,7 @@
                                       project ([$$37, $$4, $$18])
                                       -- STREAM_PROJECT  |PARTITIONED|
                                         select (function-call: algebricks:or, Args:[function-call: algebricks:gt, Args:[%0->$$5, 1], function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$5, 1], function-call: algebricks:neq, Args:[%0->$$18, %0->$$6]]])
-                                        -- STREAM_SELECT  |UNPARTITIONED|
+                                        -- STREAM_SELECT  |PARTITIONED|
                                           exchange 
                                           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                             join (function-call: algebricks:eq, Args:[%0->$$16, %0->$$4])
@@ -150,9 +150,9 @@
                                                             -- HYBRID_HASH_JOIN [$$18][$$36]  |PARTITIONED|
                                                               exchange 
                                                               -- HASH_PARTITION_EXCHANGE [$$18]  |PARTITIONED|
-                                                                project ([$$16, $$18])
+                                                                project ([$$18, $$16])
                                                                 -- STREAM_PROJECT  |PARTITIONED|
-                                                                  select (function-call: algebricks:and, Args:[function-call: algebricks:gt, Args:[%0->$$28, %0->$$27], function-call: algebricks:gt, Args:[%0->$$28, %0->$$27]])
+                                                                  select (function-call: algebricks:gt, Args:[%0->$$28, %0->$$27])
                                                                   -- STREAM_SELECT  |PARTITIONED|
                                                                     exchange 
                                                                     -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -221,4 +221,4 @@
                                         exchange 
                                         -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                           empty-tuple-source
-                                          -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                          -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q22_global_sales_opportunity.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q22_global_sales_opportunity.plan
index 591576b..c5897f7 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q22_global_sales_opportunity.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q22_global_sales_opportunity.plan
@@ -33,7 +33,7 @@
                     nested tuple source
                     -- NESTED_TUPLE_SOURCE  |LOCAL|
                }
-        -- EXTERNAL_GROUP_BY[]  |LOCAL|
+        -- EXTERNAL_GROUP_BY[]  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             select (function-call: algebricks:gt, Args:[%0->$$1, 0.0])
@@ -53,9 +53,9 @@
     distinct ([%0->$$2])
     -- PRE_SORTED_DISTINCT_BY  |PARTITIONED|
       exchange 
-      -- ONE_TO_ONE_EXCHANGE  |LOCAL|
+      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
         order (ASC, %0->$$2) 
-        -- STABLE_SORT [$$2(ASC)]  |LOCAL|
+        -- STABLE_SORT [$$2(ASC)]  |PARTITIONED|
           exchange 
           -- HASH_PARTITION_EXCHANGE [$$2]  |PARTITIONED|
             data-scan [$$2]<-[$$1, $$2, $$3, $$4, $$5, $$6, $$7, $$8, $$9] <- default.orders
@@ -73,7 +73,7 @@
       exchange 
       -- SORT_MERGE_EXCHANGE [$$6(ASC) ]  |PARTITIONED|
         order (ASC, %0->$$6) 
-        -- STABLE_SORT [$$6(ASC)]  |LOCAL|
+        -- STABLE_SORT [$$6(ASC)]  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             group by ([$$6 := %0->$$13]) decor ([]) {
@@ -91,7 +91,7 @@
                             nested tuple source
                             -- NESTED_TUPLE_SOURCE  |LOCAL|
                        }
-                -- EXTERNAL_GROUP_BY[$$5]  |LOCAL|
+                -- EXTERNAL_GROUP_BY[$$5]  |PARTITIONED|
                   exchange 
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                     project ([$$5, $$3])
@@ -133,4 +133,4 @@
                               exchange 
                               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                 empty-tuple-source
-                                -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q2_minimum_cost_supplier.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q2_minimum_cost_supplier.plan
index 151f34d..6138f7a 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q2_minimum_cost_supplier.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q2_minimum_cost_supplier.plan
@@ -10,7 +10,7 @@
         -- HASH_PARTITION_EXCHANGE [$$1]  |PARTITIONED|
           project ([$$1, $$3])
           -- STREAM_PROJECT  |PARTITIONED|
-            select (function-call: algebricks:and, Args:[function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$5, %BRASS], function-call: algebricks:eq, Args:[%0->$$6, 15], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$5, %BRASS]])
+            select (function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$6, 15], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$5, %BRASS]])
             -- STREAM_SELECT  |PARTITIONED|
               exchange 
               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -103,11 +103,11 @@
                       nested tuple source
                       -- NESTED_TUPLE_SOURCE  |LOCAL|
                  }
-          -- PRE_CLUSTERED_GROUP_BY[$$4]  |LOCAL|
+          -- PRE_CLUSTERED_GROUP_BY[$$4]  |PARTITIONED|
             exchange 
-            -- ONE_TO_ONE_EXCHANGE  |LOCAL|
+            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
               order (ASC, %0->$$4) 
-              -- STABLE_SORT [$$4(ASC)]  |LOCAL|
+              -- STABLE_SORT [$$4(ASC)]  |PARTITIONED|
                 exchange 
                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                   data-scan [$$4, $$5]<-[$$1, $$2, $$3, $$4, $$5, $$6, $$7, $$8, $$9] <- default.q2_minimum_cost_supplier_tmp1
@@ -125,11 +125,11 @@
       exchange 
       -- SORT_MERGE_EXCHANGE [$$3(DESC), $$5(ASC), $$4(ASC), $$6(ASC) ]  |PARTITIONED|
         limit 100
-        -- STREAM_LIMIT  |LOCAL|
+        -- STREAM_LIMIT  |PARTITIONED|
           exchange 
-          -- ONE_TO_ONE_EXCHANGE  |LOCAL|
+          -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             order (DESC, %0->$$3) (ASC, %0->$$5) (ASC, %0->$$4) (ASC, %0->$$6) 
-            -- STABLE_SORT [$$3(DESC), $$5(ASC), $$4(ASC), $$6(ASC)]  |LOCAL|
+            -- STABLE_SORT [$$3(DESC), $$5(ASC), $$4(ASC), $$6(ASC)]  |PARTITIONED|
               exchange 
               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                 project ([$$3, $$4, $$5, $$6, $$8, $$9, $$10, $$11])
@@ -153,4 +153,4 @@
                           exchange 
                           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                             empty-tuple-source
-                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q3_shipping_priority.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q3_shipping_priority.plan
index a1b8e42..31c4210 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q3_shipping_priority.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q3_shipping_priority.plan
@@ -7,11 +7,11 @@
       exchange 
       -- SORT_MERGE_EXCHANGE [$$34(DESC) ]  |PARTITIONED|
         limit 10
-        -- STREAM_LIMIT  |LOCAL|
+        -- STREAM_LIMIT  |PARTITIONED|
           exchange 
-          -- ONE_TO_ONE_EXCHANGE  |LOCAL|
+          -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             order (DESC, %0->$$34) 
-            -- STABLE_SORT [$$34(DESC)]  |LOCAL|
+            -- STABLE_SORT [$$34(DESC)]  |PARTITIONED|
               exchange 
               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                 project ([$$1, $$34, $$29, $$32])
@@ -67,4 +67,4 @@
                                             exchange 
                                             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                               empty-tuple-source
-                                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q4_order_priority.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q4_order_priority.plan
index 435fd7c..be5a66a 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q4_order_priority.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q4_order_priority.plan
@@ -5,9 +5,9 @@
     distinct ([%0->$$1])
     -- PRE_SORTED_DISTINCT_BY  |PARTITIONED|
       exchange 
-      -- ONE_TO_ONE_EXCHANGE  |LOCAL|
+      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
         order (ASC, %0->$$1) 
-        -- STABLE_SORT [$$1(ASC)]  |LOCAL|
+        -- STABLE_SORT [$$1(ASC)]  |PARTITIONED|
           exchange 
           -- HASH_PARTITION_EXCHANGE [$$1]  |PARTITIONED|
             project ([$$1])
@@ -31,7 +31,7 @@
       exchange 
       -- SORT_MERGE_EXCHANGE [$$11(ASC) ]  |PARTITIONED|
         order (ASC, %0->$$11) 
-        -- STABLE_SORT [$$11(ASC)]  |LOCAL|
+        -- STABLE_SORT [$$11(ASC)]  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             group by ([$$11 := %0->$$16]) decor ([]) {
@@ -49,7 +49,7 @@
                             nested tuple source
                             -- NESTED_TUPLE_SOURCE  |LOCAL|
                        }
-                -- EXTERNAL_GROUP_BY[$$7]  |LOCAL|
+                -- EXTERNAL_GROUP_BY[$$7]  |PARTITIONED|
                   exchange 
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                     project ([$$7])
@@ -70,7 +70,7 @@
                           -- HASH_PARTITION_EXCHANGE [$$2]  |PARTITIONED|
                             project ([$$2, $$7])
                             -- STREAM_PROJECT  |PARTITIONED|
-                              select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$6, 1993-10-01], function-call: algebricks:ge, Args:[%0->$$6, 1993-07-01], function-call: algebricks:lt, Args:[%0->$$6, 1993-10-01]])
+                              select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$6, 1993-07-01], function-call: algebricks:lt, Args:[%0->$$6, 1993-10-01]])
                               -- STREAM_SELECT  |PARTITIONED|
                                 exchange 
                                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -79,4 +79,4 @@
                                     exchange 
                                     -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                       empty-tuple-source
-                                      -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                      -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q5_local_supplier_volume.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q5_local_supplier_volume.plan
index 177d24c..383e550 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q5_local_supplier_volume.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q5_local_supplier_volume.plan
@@ -5,7 +5,7 @@
     exchange 
     -- SORT_MERGE_EXCHANGE [$$49(DESC) ]  |PARTITIONED|
       order (DESC, %0->$$49) 
-      -- STABLE_SORT [$$49(DESC)]  |LOCAL|
+      -- STABLE_SORT [$$49(DESC)]  |PARTITIONED|
         exchange 
         -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
           group by ([$$48 := %0->$$52]) decor ([]) {
@@ -23,7 +23,7 @@
                           nested tuple source
                           -- NESTED_TUPLE_SOURCE  |LOCAL|
                      }
-              -- EXTERNAL_GROUP_BY[$$42]  |LOCAL|
+              -- EXTERNAL_GROUP_BY[$$42]  |PARTITIONED|
                 exchange 
                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                   project ([$$42, $$23, $$24])
@@ -106,7 +106,7 @@
                                 -- HASH_PARTITION_EXCHANGE [$$9]  |PARTITIONED|
                                   project ([$$9, $$10])
                                   -- STREAM_PROJECT  |PARTITIONED|
-                                    select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$13, 1995-01-01], function-call: algebricks:ge, Args:[%0->$$13, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$13, 1995-01-01]])
+                                    select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$13, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$13, 1995-01-01]])
                                     -- STREAM_SELECT  |PARTITIONED|
                                       exchange 
                                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -123,4 +123,4 @@
                             exchange 
                             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                               empty-tuple-source
-                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q6_forecast_revenue_change.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q6_forecast_revenue_change.plan
index cd9ffcd..aac9a5b 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q6_forecast_revenue_change.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q6_forecast_revenue_change.plan
@@ -17,12 +17,12 @@
                     nested tuple source
                     -- NESTED_TUPLE_SOURCE  |LOCAL|
                }
-        -- EXTERNAL_GROUP_BY[]  |LOCAL|
+        -- EXTERNAL_GROUP_BY[]  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             project ([$$6, $$7])
             -- STREAM_PROJECT  |PARTITIONED|
-              select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$11, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1995-01-01], function-call: algebricks:ge, Args:[%0->$$7, 0.05], function-call: algebricks:le, Args:[%0->$$7, 0.07], function-call: algebricks:lt, Args:[%0->$$5, 24], function-call: algebricks:ge, Args:[%0->$$11, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1995-01-01], function-call: algebricks:ge, Args:[%0->$$7, 0.05], function-call: algebricks:le, Args:[%0->$$7, 0.07], function-call: algebricks:lt, Args:[%0->$$5, 24]])
+              select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$11, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1995-01-01], function-call: algebricks:ge, Args:[%0->$$7, 0.05], function-call: algebricks:le, Args:[%0->$$7, 0.07], function-call: algebricks:lt, Args:[%0->$$5, 24.0]])
               -- STREAM_SELECT  |PARTITIONED|
                 exchange 
                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -31,4 +31,4 @@
                     exchange 
                     -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                       empty-tuple-source
-                      -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                      -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q7_volume_shipping.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q7_volume_shipping.plan
index 39f8301..c1d5b26 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q7_volume_shipping.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q7_volume_shipping.plan
@@ -5,9 +5,9 @@
     union ($$6, $$10, $$17) ($$2, $$14, $$18) ($$5, $$9, $$19) ($$1, $$13, $$20)
     -- UNION_ALL  |PARTITIONED|
       exchange 
-      -- ONE_TO_ONE_EXCHANGE  |UNPARTITIONED|
+      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
         project ([$$6, $$2, $$5, $$1])
-        -- STREAM_PROJECT  |UNPARTITIONED|
+        -- STREAM_PROJECT  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             join (true)
@@ -31,9 +31,9 @@
                   select (function-call: algebricks:eq, Args:[%0->$$6, FRANCE])
                   -- STREAM_SELECT  |PARTITIONED|
                     project ([$$5, $$6])
-                    -- STREAM_PROJECT  |UNPARTITIONED|
+                    -- STREAM_PROJECT  |PARTITIONED|
                       assign [$$5, $$6] <- [%0->$$9, %0->$$10]
-                      -- ASSIGN  |UNPARTITIONED|
+                      -- ASSIGN  |PARTITIONED|
                         exchange 
                         -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                           replicate 
@@ -47,9 +47,9 @@
                                   empty-tuple-source
                                   -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
       exchange 
-      -- ONE_TO_ONE_EXCHANGE  |UNPARTITIONED|
+      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
         project ([$$10, $$14, $$9, $$13])
-        -- STREAM_PROJECT  |UNPARTITIONED|
+        -- STREAM_PROJECT  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             join (true)
@@ -91,7 +91,7 @@
     exchange 
     -- SORT_MERGE_EXCHANGE [$$47(ASC), $$48(ASC), $$49(ASC) ]  |PARTITIONED|
       order (ASC, %0->$$47) (ASC, %0->$$48) (ASC, %0->$$49) 
-      -- STABLE_SORT [$$47(ASC), $$48(ASC), $$49(ASC)]  |LOCAL|
+      -- STABLE_SORT [$$47(ASC), $$48(ASC), $$49(ASC)]  |PARTITIONED|
         exchange 
         -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
           group by ([$$47 := %0->$$53; $$48 := %0->$$54; $$49 := %0->$$55]) decor ([]) {
@@ -109,7 +109,7 @@
                           nested tuple source
                           -- NESTED_TUPLE_SOURCE  |LOCAL|
                      }
-              -- EXTERNAL_GROUP_BY[$$1, $$2, $$45]  |LOCAL|
+              -- EXTERNAL_GROUP_BY[$$1, $$2, $$45]  |PARTITIONED|
                 exchange 
                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                   project ([$$1, $$2, $$45, $$46])
@@ -148,7 +148,7 @@
                                                   -- HYBRID_HASH_JOIN [$$20][$$36]  |PARTITIONED|
                                                     exchange 
                                                     -- HASH_PARTITION_EXCHANGE [$$20]  |PARTITIONED|
-                                                      select (function-call: algebricks:and, Args:[function-call: algebricks:le, Args:[%0->$$30, 1996-12-31], function-call: algebricks:ge, Args:[%0->$$30, 1995-01-01], function-call: algebricks:le, Args:[%0->$$30, 1996-12-31]])
+                                                      select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$30, 1995-01-01], function-call: algebricks:le, Args:[%0->$$30, 1996-12-31]])
                                                       -- STREAM_SELECT  |PARTITIONED|
                                                         exchange 
                                                         -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -189,4 +189,4 @@
                                 exchange 
                                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                   empty-tuple-source
-                                  -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                  -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q8_national_market_share.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q8_national_market_share.plan
index b807a24..b9916e2 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q8_national_market_share.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q8_national_market_share.plan
@@ -3,7 +3,7 @@
   exchange 
   -- SORT_MERGE_EXCHANGE [$$63(ASC) ]  |PARTITIONED|
     order (ASC, %0->$$63) 
-    -- STABLE_SORT [$$63(ASC)]  |LOCAL|
+    -- STABLE_SORT [$$63(ASC)]  |PARTITIONED|
       exchange 
       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
         project ([$$63, $$66])
@@ -27,7 +27,7 @@
                               nested tuple source
                               -- NESTED_TUPLE_SOURCE  |LOCAL|
                          }
-                  -- EXTERNAL_GROUP_BY[$$61]  |LOCAL|
+                  -- EXTERNAL_GROUP_BY[$$61]  |PARTITIONED|
                     exchange 
                     -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                       project ([$$61, $$62, $$2])
@@ -138,7 +138,7 @@
                                                                 -- HASH_PARTITION_EXCHANGE [$$38]  |PARTITIONED|
                                                                   project ([$$38, $$37, $$41])
                                                                   -- STREAM_PROJECT  |PARTITIONED|
-                                                                    select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$41, 1996-12-31], function-call: algebricks:ge, Args:[%0->$$41, 1995-01-01]])
+                                                                    select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$41, 1995-01-01], function-call: algebricks:lt, Args:[%0->$$41, 1996-12-31]])
                                                                     -- STREAM_SELECT  |PARTITIONED|
                                                                       exchange 
                                                                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
@@ -175,7 +175,7 @@
                                   project ([$$1, $$2])
                                   -- STREAM_PROJECT  |PARTITIONED|
                                     assign [$$1, $$2, $$3, $$4] <- [%0->$$54, %0->$$55, %0->$$56, %0->$$57]
-                                    -- ASSIGN  |UNPARTITIONED|
+                                    -- ASSIGN  |PARTITIONED|
                                       exchange 
                                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                         replicate 
@@ -187,4 +187,4 @@
                                               exchange 
                                               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                                 empty-tuple-source
-                                                -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                                -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q9_product_type_profit.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q9_product_type_profit.plan
index f57f4a3..ecf4acb 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q9_product_type_profit.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q9_product_type_profit.plan
@@ -5,7 +5,7 @@
     exchange 
     -- SORT_MERGE_EXCHANGE [$$53(ASC), $$54(DESC) ]  |PARTITIONED|
       order (ASC, %0->$$53) (DESC, %0->$$54) 
-      -- STABLE_SORT [$$53(ASC), $$54(DESC)]  |LOCAL|
+      -- STABLE_SORT [$$53(ASC), $$54(DESC)]  |PARTITIONED|
         exchange 
         -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
           group by ([$$53 := %0->$$58; $$54 := %0->$$59]) decor ([]) {
@@ -23,7 +23,7 @@
                           nested tuple source
                           -- NESTED_TUPLE_SOURCE  |LOCAL|
                      }
-              -- EXTERNAL_GROUP_BY[$$48, $$51]  |LOCAL|
+              -- EXTERNAL_GROUP_BY[$$48, $$51]  |PARTITIONED|
                 exchange 
                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                   project ([$$48, $$51, $$52])
@@ -121,4 +121,4 @@
                                 exchange 
                                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                   empty-tuple-source
-                                  -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                  -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u1_group_by.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u1_group_by.plan
index 188aa6d..bec1353 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u1_group_by.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u1_group_by.plan
@@ -19,7 +19,7 @@
                       nested tuple source
                       -- NESTED_TUPLE_SOURCE  |LOCAL|
                  }
-          -- EXTERNAL_GROUP_BY[$$9]  |LOCAL|
+          -- EXTERNAL_GROUP_BY[$$9]  |PARTITIONED|
             exchange 
             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
               project ([$$9, $$5, $$6, $$7, $$8])
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u5_lateral_view.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u5_lateral_view.plan
index 48e624e..2cbea4a 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u5_lateral_view.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u5_lateral_view.plan
@@ -6,7 +6,7 @@
     -- UNNEST  |PARTITIONED|
       exchange 
       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-        data-scan [$$1, $$2, $$3]<-[$$1, $$2, $$3, $$4, $$5, $$6, $$7] <- default.supplier
+        data-scan [$$2, $$3, $$1]<-[$$1, $$2, $$3, $$4, $$5, $$6, $$7] <- default.supplier
         -- DATASOURCE_SCAN  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u6_limit.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u6_limit.plan
index b5ed12f..6a0b125 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u6_limit.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u6_limit.plan
@@ -7,14 +7,14 @@
       exchange 
       -- SORT_MERGE_EXCHANGE [$$4(ASC) ]  |PARTITIONED|
         limit 4
-        -- STREAM_LIMIT  |LOCAL|
+        -- STREAM_LIMIT  |PARTITIONED|
           exchange 
-          -- ONE_TO_ONE_EXCHANGE  |LOCAL|
+          -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             order (ASC, %0->$$4) 
-            -- STABLE_SORT [$$4(ASC)]  |LOCAL|
+            -- STABLE_SORT [$$4(ASC)]  |PARTITIONED|
               exchange 
               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                select (function-call: algebricks:lt, Args:[%0->$$4, 10000])
+                select (function-call: algebricks:lt, Args:[%0->$$4, 10000.0])
                 -- STREAM_SELECT  |PARTITIONED|
                   exchange 
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u7_multi_join.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u7_multi_join.plan
index ab55181..b5f1dc2 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u7_multi_join.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u7_multi_join.plan
@@ -16,37 +16,35 @@
               -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
         exchange 
         -- HASH_PARTITION_EXCHANGE [$$25]  |PARTITIONED|
-          project ([$$32, $$25, $$29, $$28])
+          project ([$$25, $$28, $$29, $$32])
           -- STREAM_PROJECT  |PARTITIONED|
-            project ([$$25, $$17, $$28, $$29, $$32])
-            -- STREAM_PROJECT  |PARTITIONED|
-              exchange 
-              -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                join (function-call: algebricks:eq, Args:[%0->$$26, %0->$$17])
-                -- HYBRID_HASH_JOIN [$$26][$$17]  |PARTITIONED|
-                  exchange 
-                  -- HASH_PARTITION_EXCHANGE [$$26]  |PARTITIONED|
-                    select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$28, 30000], function-call: algebricks:lt, Args:[%0->$$28, 30000]])
+            exchange 
+            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+              join (function-call: algebricks:eq, Args:[%0->$$26, %0->$$17])
+              -- HYBRID_HASH_JOIN [$$26][$$17]  |PARTITIONED|
+                exchange 
+                -- HASH_PARTITION_EXCHANGE [$$26]  |PARTITIONED|
+                  select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$28, 30000.0], function-call: algebricks:lt, Args:[%0->$$26, 5]])
+                  -- STREAM_SELECT  |PARTITIONED|
+                    exchange 
+                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                      data-scan [$$32, $$25, $$26, $$29, $$28]<-[$$25, $$26, $$27, $$28, $$29, $$30, $$31, $$32, $$33] <- default.orders
+                      -- DATASOURCE_SCAN  |PARTITIONED|
+                        exchange 
+                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                          empty-tuple-source
+                          -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                exchange 
+                -- HASH_PARTITION_EXCHANGE [$$17]  |PARTITIONED|
+                  project ([$$17])
+                  -- STREAM_PROJECT  |PARTITIONED|
+                    select (function-call: algebricks:lt, Args:[%0->$$17, 5])
                     -- STREAM_SELECT  |PARTITIONED|
                       exchange 
                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                        data-scan [$$32, $$25, $$26, $$29, $$28]<-[$$25, $$26, $$27, $$28, $$29, $$30, $$31, $$32, $$33] <- default.orders
+                        data-scan [$$17]<-[$$17, $$18, $$19, $$20, $$21, $$22, $$23, $$24] <- default.customer
                         -- DATASOURCE_SCAN  |PARTITIONED|
                           exchange 
                           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                             empty-tuple-source
-                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
-                  exchange 
-                  -- HASH_PARTITION_EXCHANGE [$$17]  |PARTITIONED|
-                    project ([$$17])
-                    -- STREAM_PROJECT  |PARTITIONED|
-                      select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$17, 5], function-call: algebricks:lt, Args:[%0->$$17, 5]])
-                      -- STREAM_SELECT  |PARTITIONED|
-                        exchange 
-                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                          data-scan [$$17]<-[$$17, $$18, $$19, $$20, $$21, $$22, $$23, $$24] <- default.customer
-                          -- DATASOURCE_SCAN  |PARTITIONED|
-                            exchange 
-                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                              empty-tuple-source
-                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u9_order_by.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u9_order_by.plan
index 7370fcf..344898d 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u9_order_by.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u9_order_by.plan
@@ -3,7 +3,7 @@
   exchange 
   -- SORT_MERGE_EXCHANGE [$$2(ASC) ]  |PARTITIONED|
     order (ASC, %0->$$2) 
-    -- STABLE_SORT [$$2(ASC)]  |LOCAL|
+    -- STABLE_SORT [$$2(ASC)]  |PARTITIONED|
       exchange 
       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
         select (function-call: algebricks:lt, Args:[function-call: hive:org.apache.hadoop.hive.ql.udf.UDFOPMultiply, Args:[%0->$$1, 2], 20])
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/hive/conf/hive-default.xml b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/hive/conf/hive-default.xml
index a4ee677..49cdedf 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/hive/conf/hive-default.xml
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/hive/conf/hive-default.xml
@@ -1,22 +1,66 @@
 <?xml version="1.0"?>
-<!--
- ! 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.
- !-->
+<!-- ! 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. ! -->
 <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
 
 <configuration>
 
+	<!-- Hivesterix Execution Parameters -->
+	<property>
+		<name>hive.hyracks.connectorpolicy</name>
+		<value>PIPELINING</value>
+	</property>
+
+	<property>
+		<name>hive.hyracks.parrallelism</name>
+		<value>4</value>
+	</property>
+
+	<property>
+		<name>hive.algebricks.groupby.external</name>
+		<value>true</value>
+	</property>
+
+	<property>
+		<name>hive.algebricks.groupby.external.memory</name>
+		<value>3072</value>
+	</property>
+
+	<property>
+		<name>hive.algebricks.sort.memory</name>
+		<value>3072</value>
+	</property>
+
+	<property>
+		<name>hive.algebricks.framesize</name>
+		<value>768</value>
+	</property>
+
+	<property>
+		<name>hive.auto.convert.join</name>
+		<value>false</value>
+	</property>
+
+	<property>
+		<name>hive.auto.convert.join.noconditionaltask</name>
+		<value>false</value>
+		<description>Whether Hive enable the optimization about converting
+			common join into mapjoin based on the input file
+			size. If this paramater is on, and the sum of size for n-1 of the
+			tables/partitions for a n-way join is smaller than the
+			specified size, the join is directly converted to a mapjoin (there is no
+			conditional task).
+		</description>
+	</property>
+
+
 	<!-- Hive Configuration can either be stored in this file or in the hadoop 
 		configuration files -->
 	<!-- that are implied by Hadoop setup variables. -->
@@ -42,52 +86,6 @@
 	</property>
 
 	<property>
-		<name>hive.hyracks.connectorpolicy</name>
-		<value>SEND_SIDE_MAT_PIPELINING</value>
-	</property>
-
-	<property>
-		<name>hive.hyracks.host</name>
-		<value>127.0.0.1</value>
-	</property>
-
-	<property>
-		<name>hive.hyracks.port</name>
-		<value>13099</value>
-	</property>
-
-	<property>
-		<name>hive.hyracks.app</name>
-		<value>hivesterix</value>
-	</property>
-
-
-	<property>
-		<name>hive.hyracks.parrallelism</name>
-		<value>2</value>
-	</property>
-
-	<property>
-		<name>hive.algebricks.groupby.external</name>
-		<value>true</value>
-	</property>
-
-	<property>
-		<name>hive.algebricks.groupby.external.memory</name>
-		<value>3072</value>
-	</property>
-
-	<property>
-		<name>hive.algebricks.sort.memory</name>
-		<value>3072</value>
-	</property>
-
-	<property>
-		<name>hive.algebricks.framesize</name>
-		<value>768</value>
-	</property>
-
-	<property>
 		<name>hive.exec.reducers.bytes.per.reducer</name>
 		<value>1000000000</value>
 		<description>size per reducer.The default is 1G, i.e if the input size
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/logging.properties b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/logging.properties
index a7d8d9c..f886a44 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/logging.properties
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/logging.properties
@@ -43,7 +43,7 @@
 # Note that the ConsoleHandler also has a separate level
 # setting to limit messages printed to the console.
 
-.level= WARNING
+.level= INFO
 # .level= INFO
 # .level= FINE
 # .level = FINEST
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q10_returned_item.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q10_returned_item.hive
index 3f1214a..bb07665 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q10_returned_item.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q10_returned_item.hive
@@ -13,9 +13,6 @@
 -- create the result table
 create table q10_returned_item (c_custkey int, c_name string, revenue double, c_acctbal string, n_name string, c_address string, c_phone string, c_comment string);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1024000000;
-
 -- the query
 insert overwrite table q10_returned_item
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q12_shipping.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q12_shipping.hive
index 062f7b9..8546365 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q12_shipping.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q12_shipping.hive
@@ -9,9 +9,6 @@
 -- create the result table
 create table q12_shipping(l_shipmode string, high_line_count double, low_line_count double);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1225000000;
-
 -- the query
 insert overwrite table q12_shipping
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q14_promotion_effect.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q14_promotion_effect.hive
index 988f400..4644d23 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q14_promotion_effect.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q14_promotion_effect.hive
@@ -9,9 +9,6 @@
 -- create the result table
 create table q14_promotion_effect(promo_revenue double);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1040000000;
-
 -- the query
 insert overwrite table q14_promotion_effect
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q15_top_supplier.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q15_top_supplier.hive
index 04064ed..8fa333e 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q15_top_supplier.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q15_top_supplier.hive
@@ -14,8 +14,6 @@
 create table q15_top_supplier(s_suppkey int, s_name string, s_address string, s_phone string, total_revenue double);
 
 
-set mapred.min.split.size=536870912;
-
 -- the query
 insert overwrite table revenue
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q18_large_volume_customer.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q18_large_volume_customer.hive
index ac2902c..d1eaacc 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q18_large_volume_customer.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q18_large_volume_customer.hive
@@ -13,9 +13,6 @@
 create table q18_tmp(l_orderkey int, t_sum_quantity double);
 create table q18_large_volume_customer(c_name string, c_custkey int, o_orderkey int, o_orderdate string, o_totalprice double, sum_quantity double);
 
-set mapred.min.split.size=268435456;
-set hive.exec.reducers.bytes.per.reducer=1164000000;
-
 -- the query
 insert overwrite table q18_tmp
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q19_discounted_revenue.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q19_discounted_revenue.hive
index 2002e1e..6badfcf 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q19_discounted_revenue.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q19_discounted_revenue.hive
@@ -9,9 +9,6 @@
 -- create the result table
 create table q19_discounted_revenue(revenue double);
 
-set mapred.min.split.size=268435456;
-set hive.exec.reducers.bytes.per.reducer=1040000000;
-
 -- the query
 insert overwrite table q19_discounted_revenue
 select
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q1_pricing_summary_report.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q1_pricing_summary_report.hive
index a002068..af64a4f 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q1_pricing_summary_report.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q1_pricing_summary_report.hive
@@ -7,8 +7,6 @@
 -- create the target table
 CREATE TABLE q1_pricing_summary_report ( L_RETURNFLAG STRING, L_LINESTATUS STRING, SUM_QTY DOUBLE, SUM_BASE_PRICE DOUBLE, SUM_DISC_PRICE DOUBLE, SUM_CHARGE DOUBLE, AVE_QTY DOUBLE, AVE_PRICE DOUBLE, AVE_DISC DOUBLE, COUNT_ORDER INT);
 
-set mapred.min.split.size=536870912;
-
 -- the query
 INSERT OVERWRITE TABLE q1_pricing_summary_report 
 SELECT 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q20_potential_part_promotion.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q20_potential_part_promotion.hive
index 2bb90ea..32181bf 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q20_potential_part_promotion.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q20_potential_part_promotion.hive
@@ -23,8 +23,6 @@
 create table q20_tmp4(ps_suppkey int);
 create table q20_potential_part_promotion(s_name string, s_address string);
 
-set mapred.min.split.size=536870912;
-
 -- the query
 insert overwrite table q20_tmp1
 select distinct p_partkey
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q3_shipping_priority.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q3_shipping_priority.hive
index 0049eb3..67f6dc4 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q3_shipping_priority.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q3_shipping_priority.hive
@@ -11,9 +11,6 @@
 -- create the target table
 create table q3_shipping_priority (l_orderkey int, revenue double, o_orderdate string, o_shippriority int);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1024000000;
-
 -- the query
 Insert overwrite table q3_shipping_priority 
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q4_order_priority.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q4_order_priority.hive
index aa828e9..efbcff2 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q4_order_priority.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q4_order_priority.hive
@@ -11,7 +11,6 @@
 CREATE TABLE q4_order_priority_tmp (O_ORDERKEY INT);
 CREATE TABLE q4_order_priority (O_ORDERPRIORITY STRING, ORDER_COUNT INT);
 
-set mapred.min.split.size=536870912;
 -- the query
 INSERT OVERWRITE TABLE q4_order_priority_tmp 
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q5_local_supplier_volume.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q5_local_supplier_volume.hive
index 9af2dd2..838a1e8 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q5_local_supplier_volume.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q5_local_supplier_volume.hive
@@ -17,7 +17,6 @@
 -- create the target table
 create table q5_local_supplier_volume (N_NAME STRING, REVENUE DOUBLE);
 
-set mapred.min.split.size=536870912;
 
 -- the query
 insert overwrite table q5_local_supplier_volume 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q7_volume_shipping.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q7_volume_shipping.hive
index 2678f80..12ae8ae 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q7_volume_shipping.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q7_volume_shipping.hive
@@ -17,9 +17,6 @@
 create table q7_volume_shipping (supp_nation string, cust_nation string, l_year int, revenue double);
 create table q7_volume_shipping_tmp(supp_nation string, cust_nation string, s_nationkey int, c_nationkey int);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1225000000;
-
 -- the query
 insert overwrite table q7_volume_shipping_tmp
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q9_product_type_profit.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q9_product_type_profit.hive
index 2e5b4a1..c491997 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q9_product_type_profit.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q9_product_type_profit.hive
@@ -17,9 +17,6 @@
 -- create the result table
 create table q9_product_type_profit (nation string, o_year string, sum_profit double);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1024000000;
-
 -- the query
 insert overwrite table q9_product_type_profit
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/u8_order_by.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/u8_order_by.hive
new file mode 100644
index 0000000..6efd2ae
--- /dev/null
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/u8_order_by.hive
@@ -0,0 +1,8 @@
+drop table IF EXISTS nation;
+drop table IF EXISTS u8_non_mapred;
+
+create external table nation (N_NATIONKEY INT, N_NAME STRING, N_REGIONKEY INT, N_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION '/tpch/nation';
+create table u8_order_by (N_NATIONKEY INT, N_NAME STRING, N_REGIONKEY INT, N_COMMENT STRING);
+
+insert overwrite table u8_order_by
+select * FROM nation order by N_NATIONKEY;
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/results/u8_order_by.result b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/results/u8_order_by.result
new file mode 100644
index 0000000..719b246
--- /dev/null
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/results/u8_order_by.result
@@ -0,0 +1,25 @@
+0ALGERIA0 haggle. carefully final deposits detect slyly agai
+1ARGENTINA1al foxes promise slyly according to the regular accounts. bold requests alon
+2BRAZIL1y alongside of the pending deposits. carefully special packages are about the ironic forges. slyly special 
+3CANADA1eas hang ironic, silent packages. slyly regular packages are furiously over the tithes. fluffily bold
+4EGYPT4y above the carefully unusual theodolites. final dugouts are quickly across the furiously regular d
+5ETHIOPIA0ven packages wake quickly. regu
+6FRANCE3refully final requests. regular, ironi
+7GERMANY3l platelets. regular accounts x-ray: unusual, regular acco
+8INDIA2ss excuses cajole slyly across the packages. deposits print aroun
+9INDONESIA2 slyly express asymptotes. regular deposits haggle slyly. carefully ironic hockey players sleep blithely. carefull
+10IRAN4efully alongside of the slyly final dependencies. 
+11IRAQ4nic deposits boost atop the quickly final requests? quickly regula
+12JAPAN2ously. final, express gifts cajole a
+13JORDAN4ic deposits are blithely about the carefully regular pa
+14KENYA0 pending excuses haggle furiously deposits. pending, express pinto beans wake fluffily past t
+15MOROCCO0rns. blithely bold courts among the closely regular packages use furiously bold platelets?
+16MOZAMBIQUE0s. ironic, unusual asymptotes wake blithely r
+17PERU1platelets. blithely pending dependencies use fluffily across the even pinto beans. carefully silent accoun
+18CHINA2c dependencies. furiously express notornis sleep slyly regular accounts. ideas sleep. depos
+19ROMANIA3ular asymptotes are about the furious multipliers. express dependencies nag above the ironically ironic account
+20SAUDI ARABIA4ts. silent requests haggle. closely express packages sleep across the blithely
+21VIETNAM2hely enticingly express accounts. even, final 
+22RUSSIA3 requests against the platelets use never according to the quickly regular pint
+23UNITED KINGDOM3eans boost carefully special requests. accounts are. carefull
+24UNITED STATES1y final packages. slow foxes cajole quickly. quickly silent platelets breach ironic accounts. unusual pinto be
diff --git a/hivesterix/hivesterix-optimizer/pom.xml b/hivesterix/hivesterix-optimizer/pom.xml
index ba7c7ad..858507e 100644
--- a/hivesterix/hivesterix-optimizer/pom.xml
+++ b/hivesterix/hivesterix-optimizer/pom.xml
@@ -18,7 +18,7 @@
 	<parent>
 		<artifactId>hivesterix</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 
 	<artifactId>hivesterix-optimizer</artifactId>
@@ -44,14 +44,14 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-common</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-translator</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hivesterix/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rulecollections/HiveRuleCollections.java b/hivesterix/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rulecollections/HiveRuleCollections.java
index 959e73e..12b5986 100644
--- a/hivesterix/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rulecollections/HiveRuleCollections.java
+++ b/hivesterix/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rulecollections/HiveRuleCollections.java
@@ -12,115 +12,116 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.optimizer.rulecollections;
-
-import java.util.LinkedList;
-
-import edu.uci.ics.hivesterix.optimizer.rules.InsertProjectBeforeWriteRule;
-import edu.uci.ics.hivesterix.optimizer.rules.IntroduceEarlyProjectRule;
-import edu.uci.ics.hivesterix.optimizer.rules.LocalGroupByRule;
-import edu.uci.ics.hivesterix.optimizer.rules.RemoveRedundantSelectRule;
-import edu.uci.ics.hyracks.algebricks.core.rewriter.base.HeuristicOptimizer;
-import edu.uci.ics.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.BreakSelectIntoConjunctsRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.ComplexJoinInferenceRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.ConsolidateAssignsRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.ConsolidateSelectsRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.EliminateSubplanRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.EnforceStructuralPropertiesRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.ExtractCommonOperatorsRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.ExtractGbyExpressionsRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.FactorRedundantGroupAndDecorVarsRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.InferTypesRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.InlineVariablesRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.InsertProjectBeforeUnionRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.IntroduceAggregateCombinerRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.IntroduceGroupByCombinerRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.IsolateHyracksOperatorsRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.PullSelectOutOfEqJoin;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.PushLimitDownRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.PushProjectDownRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.PushProjectIntoDataSourceScanRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.PushSelectDownRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.PushSelectIntoJoinRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.ReinferAllTypesRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.RemoveRedundantProjectionRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.RemoveUnusedAssignAndAggregateRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.SetAlgebricksPhysicalOperatorsRule;
-import edu.uci.ics.hyracks.algebricks.rewriter.rules.SetExecutionModeRule;
-
-public final class HiveRuleCollections {
-
-    public final static LinkedList<IAlgebraicRewriteRule> NORMALIZATION = new LinkedList<IAlgebraicRewriteRule>();
-    static {
-        NORMALIZATION.add(new EliminateSubplanRule());
-        NORMALIZATION.add(new BreakSelectIntoConjunctsRule());
-        NORMALIZATION.add(new PushSelectIntoJoinRule());
-        NORMALIZATION.add(new ExtractGbyExpressionsRule());
-        NORMALIZATION.add(new RemoveRedundantSelectRule());
-    }
-
-    public final static LinkedList<IAlgebraicRewriteRule> COND_PUSHDOWN_AND_JOIN_INFERENCE = new LinkedList<IAlgebraicRewriteRule>();
-    static {
-        COND_PUSHDOWN_AND_JOIN_INFERENCE.add(new PushSelectDownRule());
-        COND_PUSHDOWN_AND_JOIN_INFERENCE.add(new InlineVariablesRule());
-        COND_PUSHDOWN_AND_JOIN_INFERENCE.add(new FactorRedundantGroupAndDecorVarsRule());
-        COND_PUSHDOWN_AND_JOIN_INFERENCE.add(new EliminateSubplanRule());
-    }
-
-    public final static LinkedList<IAlgebraicRewriteRule> LOAD_FIELDS = new LinkedList<IAlgebraicRewriteRule>();
-    static {
-        // should LoadRecordFieldsRule be applied in only one pass over the
-        // plan?
-        LOAD_FIELDS.add(new InlineVariablesRule());
-        // LOAD_FIELDS.add(new RemoveUnusedAssignAndAggregateRule());
-        LOAD_FIELDS.add(new ComplexJoinInferenceRule());
-        LOAD_FIELDS.add(new InferTypesRule());
-    }
-
-    public final static LinkedList<IAlgebraicRewriteRule> OP_PUSHDOWN = new LinkedList<IAlgebraicRewriteRule>();
-    static {
-        OP_PUSHDOWN.add(new PushProjectDownRule());
-        OP_PUSHDOWN.add(new PushSelectDownRule());
-    }
-
-    public final static LinkedList<IAlgebraicRewriteRule> DATA_EXCHANGE = new LinkedList<IAlgebraicRewriteRule>();
-    static {
-        DATA_EXCHANGE.add(new SetExecutionModeRule());
-    }
-
-    public final static LinkedList<IAlgebraicRewriteRule> CONSOLIDATION = new LinkedList<IAlgebraicRewriteRule>();
-    static {
-        CONSOLIDATION.add(new RemoveRedundantProjectionRule());
-        CONSOLIDATION.add(new ConsolidateSelectsRule());
-        CONSOLIDATION.add(new IntroduceEarlyProjectRule());
-        CONSOLIDATION.add(new ConsolidateAssignsRule());
-        CONSOLIDATION.add(new IntroduceGroupByCombinerRule());
-        CONSOLIDATION.add(new IntroduceAggregateCombinerRule());
-        CONSOLIDATION.add(new RemoveUnusedAssignAndAggregateRule());
-    }
-
-    public final static LinkedList<IAlgebraicRewriteRule> PHYSICAL_PLAN_REWRITES = new LinkedList<IAlgebraicRewriteRule>();
-    static {
-        PHYSICAL_PLAN_REWRITES.add(new PullSelectOutOfEqJoin());
-        PHYSICAL_PLAN_REWRITES.add(new SetAlgebricksPhysicalOperatorsRule());
-        PHYSICAL_PLAN_REWRITES.add(new EnforceStructuralPropertiesRule());
-        PHYSICAL_PLAN_REWRITES.add(new PushProjectDownRule());
-        PHYSICAL_PLAN_REWRITES.add(new SetAlgebricksPhysicalOperatorsRule());
-        PHYSICAL_PLAN_REWRITES.add(new PushLimitDownRule());
-        PHYSICAL_PLAN_REWRITES.add(new InsertProjectBeforeWriteRule());
-        PHYSICAL_PLAN_REWRITES.add(new InsertProjectBeforeUnionRule());
-    }
-
-    public final static LinkedList<IAlgebraicRewriteRule> prepareJobGenRules = new LinkedList<IAlgebraicRewriteRule>();
-    static {
-        prepareJobGenRules.add(new ReinferAllTypesRule());
-        prepareJobGenRules.add(new IsolateHyracksOperatorsRule(
-                HeuristicOptimizer.hyraxOperatorsBelowWhichJobGenIsDisabled));
-        prepareJobGenRules.add(new ExtractCommonOperatorsRule());
-        prepareJobGenRules.add(new LocalGroupByRule());
-        prepareJobGenRules.add(new PushProjectIntoDataSourceScanRule());
-        prepareJobGenRules.add(new ReinferAllTypesRule());
-    }
-
-}
+package edu.uci.ics.hivesterix.optimizer.rulecollections;
+
+import java.util.LinkedList;
+
+import edu.uci.ics.hivesterix.optimizer.rules.InsertProjectBeforeWriteRule;
+import edu.uci.ics.hivesterix.optimizer.rules.IntroduceEarlyProjectRule;
+import edu.uci.ics.hivesterix.optimizer.rules.LocalGroupByRule;
+import edu.uci.ics.hivesterix.optimizer.rules.RemoveRedundantSelectRule;
+import edu.uci.ics.hyracks.algebricks.core.rewriter.base.HeuristicOptimizer;
+import edu.uci.ics.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.BreakSelectIntoConjunctsRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.ComplexJoinInferenceRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.ConsolidateAssignsRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.ConsolidateSelectsRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.EliminateSubplanRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.EnforceStructuralPropertiesRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.ExtractCommonOperatorsRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.ExtractGbyExpressionsRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.FactorRedundantGroupAndDecorVarsRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.InferTypesRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.InlineVariablesRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.InsertProjectBeforeUnionRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.IntroduceAggregateCombinerRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.IntroduceGroupByCombinerRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.IsolateHyracksOperatorsRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.PullSelectOutOfEqJoin;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.PushLimitDownRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.PushProjectDownRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.PushProjectIntoDataSourceScanRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.PushSelectDownRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.PushSelectIntoJoinRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.ReinferAllTypesRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.RemoveRedundantProjectionRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.RemoveUnusedAssignAndAggregateRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.SetAlgebricksPhysicalOperatorsRule;
+import edu.uci.ics.hyracks.algebricks.rewriter.rules.SetExecutionModeRule;
+
+public final class HiveRuleCollections {
+
+    public final static LinkedList<IAlgebraicRewriteRule> NORMALIZATION = new LinkedList<IAlgebraicRewriteRule>();
+    static {
+        NORMALIZATION.add(new EliminateSubplanRule());
+        NORMALIZATION.add(new BreakSelectIntoConjunctsRule());
+        NORMALIZATION.add(new PushSelectIntoJoinRule());
+        NORMALIZATION.add(new ExtractGbyExpressionsRule());
+        NORMALIZATION.add(new RemoveRedundantSelectRule());
+    }
+
+    public final static LinkedList<IAlgebraicRewriteRule> COND_PUSHDOWN_AND_JOIN_INFERENCE = new LinkedList<IAlgebraicRewriteRule>();
+    static {
+        COND_PUSHDOWN_AND_JOIN_INFERENCE.add(new PushSelectDownRule());
+        COND_PUSHDOWN_AND_JOIN_INFERENCE.add(new InlineVariablesRule());
+        COND_PUSHDOWN_AND_JOIN_INFERENCE.add(new FactorRedundantGroupAndDecorVarsRule());
+        COND_PUSHDOWN_AND_JOIN_INFERENCE.add(new EliminateSubplanRule());
+    }
+
+    public final static LinkedList<IAlgebraicRewriteRule> LOAD_FIELDS = new LinkedList<IAlgebraicRewriteRule>();
+    static {
+        // should LoadRecordFieldsRule be applied in only one pass over the
+        // plan?
+        LOAD_FIELDS.add(new InlineVariablesRule());
+        // LOAD_FIELDS.add(new RemoveUnusedAssignAndAggregateRule());
+        LOAD_FIELDS.add(new ComplexJoinInferenceRule());
+        LOAD_FIELDS.add(new InferTypesRule());
+    }
+
+    public final static LinkedList<IAlgebraicRewriteRule> OP_PUSHDOWN = new LinkedList<IAlgebraicRewriteRule>();
+    static {
+        OP_PUSHDOWN.add(new PushProjectDownRule());
+        OP_PUSHDOWN.add(new PushSelectDownRule());
+    }
+
+    public final static LinkedList<IAlgebraicRewriteRule> DATA_EXCHANGE = new LinkedList<IAlgebraicRewriteRule>();
+    static {
+        DATA_EXCHANGE.add(new SetExecutionModeRule());
+    }
+
+    public final static LinkedList<IAlgebraicRewriteRule> CONSOLIDATION = new LinkedList<IAlgebraicRewriteRule>();
+    static {
+        CONSOLIDATION.add(new RemoveRedundantProjectionRule());
+        CONSOLIDATION.add(new ConsolidateSelectsRule());
+        CONSOLIDATION.add(new IntroduceEarlyProjectRule());
+        CONSOLIDATION.add(new ConsolidateAssignsRule());
+        CONSOLIDATION.add(new IntroduceGroupByCombinerRule());
+        CONSOLIDATION.add(new IntroduceAggregateCombinerRule());
+        CONSOLIDATION.add(new RemoveUnusedAssignAndAggregateRule());
+    }
+
+    public final static LinkedList<IAlgebraicRewriteRule> PHYSICAL_PLAN_REWRITES = new LinkedList<IAlgebraicRewriteRule>();
+    static {
+        PHYSICAL_PLAN_REWRITES.add(new PullSelectOutOfEqJoin());
+        PHYSICAL_PLAN_REWRITES.add(new SetAlgebricksPhysicalOperatorsRule());
+        PHYSICAL_PLAN_REWRITES.add(new EnforceStructuralPropertiesRule());
+        PHYSICAL_PLAN_REWRITES.add(new PushProjectDownRule());
+        PHYSICAL_PLAN_REWRITES.add(new SetAlgebricksPhysicalOperatorsRule());
+        PHYSICAL_PLAN_REWRITES.add(new PushLimitDownRule());
+        PHYSICAL_PLAN_REWRITES.add(new InsertProjectBeforeWriteRule());
+        PHYSICAL_PLAN_REWRITES.add(new InsertProjectBeforeUnionRule());
+    }
+
+    public final static LinkedList<IAlgebraicRewriteRule> prepareJobGenRules = new LinkedList<IAlgebraicRewriteRule>();
+    static {
+        prepareJobGenRules.add(new ReinferAllTypesRule());
+        prepareJobGenRules.add(new IsolateHyracksOperatorsRule(
+                HeuristicOptimizer.hyraxOperatorsBelowWhichJobGenIsDisabled));
+        prepareJobGenRules.add(new ExtractCommonOperatorsRule());
+        prepareJobGenRules.add(new LocalGroupByRule());
+        prepareJobGenRules.add(new PushProjectIntoDataSourceScanRule());
+        prepareJobGenRules.add(new ReinferAllTypesRule());
+        prepareJobGenRules.add(new SetExecutionModeRule());
+    }
+
+}
diff --git a/hivesterix/hivesterix-runtime/pom.xml b/hivesterix/hivesterix-runtime/pom.xml
index 01db115..6d10286 100644
--- a/hivesterix/hivesterix-runtime/pom.xml
+++ b/hivesterix/hivesterix-runtime/pom.xml
@@ -14,24 +14,20 @@
  !-->
 <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>hivesterix-runtime</artifactId>
-	<version>0.2.7-SNAPSHOT</version>
 	<name>hivesterix-runtime</name>
 
 	<parent>
                 <groupId>edu.uci.ics.hyracks</groupId>
                 <artifactId>hivesterix</artifactId>
-                <version>0.2.7-SNAPSHOT</version>
+                <version>0.2.10-SNAPSHOT</version>
         </parent>
 
 	<dependencies>
-        <dependency>
-			<groupId>javax.servlet</groupId>
-			<artifactId>servlet-api</artifactId>
-			<version>2.5</version>
-			<type>jar</type>
-			<scope>compile</scope>
+		<dependency>
+  			<groupId>sqlline</groupId>
+  			<artifactId>sqlline</artifactId>
+  			<version>1_0_2</version>
 		</dependency>
 		<dependency>
 			<groupId>junit</groupId>
@@ -40,285 +36,105 @@
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>args4j</groupId>
-			<artifactId>args4j</artifactId>
-			<version>2.0.12</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.json</groupId>
-			<artifactId>json</artifactId>
-			<version>20090211</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.eclipse.jetty</groupId>
-			<artifactId>jetty-server</artifactId>
-			<version>8.0.0.M1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.eclipse.jetty</groupId>
-			<artifactId>jetty-servlet</artifactId>
-			<version>8.0.0.M1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>jline</groupId>
-			<artifactId>jline</artifactId>
-			<version>0.9.94</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-core</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-connectionpool</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-enhancer</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-rdbms</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-dbcp</groupId>
-			<artifactId>commons-dbcp</artifactId>
-			<version>1.4</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-pool</groupId>
-			<artifactId>commons-pool</artifactId>
-			<version>1.5.4</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-collections</groupId>
-			<artifactId>commons-collections</artifactId>
-			<version>3.2.1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-lang</groupId>
-			<artifactId>commons-lang</artifactId>
-			<version>2.4</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>javax</groupId>
-			<artifactId>jdo2-api</artifactId>
-			<version>2.3-ec</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>com.facebook</groupId>
-			<artifactId>libfb303</artifactId>
-			<version>0.5.0</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.thrift</groupId>
-			<artifactId>libthrift</artifactId>
-			<version>0.5.0</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.commons</groupId>
-			<artifactId>cli</artifactId>
-			<version>1.2</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache</groupId>
-			<artifactId>log4j</artifactId>
-			<version>1.2.15</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.antlr</groupId>
-			<artifactId>antlr-runtime</artifactId>
-			<version>3.0.1</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-cli</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-common</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-exec</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-hwi</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-jdbc</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-metastore</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-service</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-shims</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-serde</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.slf4j</groupId>
-			<artifactId>slf4j-api</artifactId>
-			<version>1.6.1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-cli</groupId>
-			<artifactId>commons-cli</artifactId>
-			<version>1.2</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.slf4j</groupId>
-			<artifactId>slf4j-log4j12</artifactId>
-			<version>1.6.1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-logging</groupId>
-			<artifactId>commons-logging</artifactId>
-			<version>1.1.1</version>
-			<type>jar</type>
-			<classifier>api</classifier>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>com.google.guava</groupId>
-			<artifactId>guava</artifactId>
-			<version>r06</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.antlr</groupId>
-			<artifactId>stringtemplate</artifactId>
-			<version>3.2</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.derby</groupId>
-			<artifactId>derby</artifactId>
-			<version>10.8.1.2</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hbase</groupId>
-			<artifactId>hbase</artifactId>
-			<version>0.90.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
+			<groupId>org.apache.hive</groupId>
+			<artifactId>hive-hbase-handler</artifactId>
+			<version>0.11.0</version>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-serde</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-common</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -386,5 +202,19 @@
 			<id>hyracks-public-release</id>
 			<url>http://obelix.ics.uci.edu/nexus/content/repositories/hyracks-public-releases</url>
 		</repository>
+		<repository>
+			<releases>
+				<enabled>true</enabled>
+				<updatePolicy>always</updatePolicy>
+				<checksumPolicy>warn</checksumPolicy>
+			</releases>
+			<snapshots>
+				<enabled>true</enabled>
+				<updatePolicy>always</updatePolicy>
+				<checksumPolicy>fail</checksumPolicy>
+			</snapshots>
+			<id>plugins-release</id>
+			<url>http://repo.springsource.org/plugins-release</url>
+		</repository>
 	</repositories>
 </project>
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AbstractExpressionEvaluator.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AbstractExpressionEvaluator.java
index a5177c9..dd4fbe7 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AbstractExpressionEvaluator.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AbstractExpressionEvaluator.java
@@ -34,6 +34,7 @@
 import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
 
+@SuppressWarnings("deprecation")
 public abstract class AbstractExpressionEvaluator implements ICopyEvaluator {
 
     private List<ICopyEvaluator> children;
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregationFunctionEvaluator.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregationFunctionEvaluator.java
index d061b23..87d2221 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregationFunctionEvaluator.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregationFunctionEvaluator.java
@@ -36,6 +36,7 @@
 import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyAggregateFunction;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
 
+@SuppressWarnings("deprecation")
 public class AggregationFunctionEvaluator implements ICopyAggregateFunction {
 
     /**
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregatuibFunctionSerializableEvaluator.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregatuibFunctionSerializableEvaluator.java
index f4b77b8..3f1cc27 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregatuibFunctionSerializableEvaluator.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregatuibFunctionSerializableEvaluator.java
@@ -35,6 +35,7 @@
 import edu.uci.ics.hyracks.algebricks.runtime.base.ICopySerializableAggregateFunction;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
 
+@SuppressWarnings("deprecation")
 public class AggregatuibFunctionSerializableEvaluator implements ICopySerializableAggregateFunction {
 
     /**
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/UDTFFunctionEvaluator.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/UDTFFunctionEvaluator.java
index d91b806..b511d87 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/UDTFFunctionEvaluator.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/UDTFFunctionEvaluator.java
@@ -35,6 +35,7 @@
 import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyUnnestingFunction;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
 
+@SuppressWarnings("deprecation")
 public class UDTFFunctionEvaluator implements ICopyUnnestingFunction, Collector {
 
     /**
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionFactory.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionFactory.java
index 09f0cb6..d65dc24 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionFactory.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionFactory.java
@@ -12,370 +12,383 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.runtime.factory.evaluator;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator;
-import org.apache.hadoop.hive.ql.exec.ExprNodeEvaluatorFactory;
-import org.apache.hadoop.hive.ql.exec.FunctionRegistry;
-import org.apache.hadoop.hive.ql.exec.Utilities;
-import org.apache.hadoop.hive.ql.metadata.HiveException;
-import org.apache.hadoop.hive.ql.plan.AggregationDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator;
-import org.apache.hadoop.hive.serde2.SerDe;
-import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
-import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
-
-import edu.uci.ics.hivesterix.logical.expression.ExpressionTranslator;
-import edu.uci.ics.hivesterix.runtime.evaluator.AggregationFunctionEvaluator;
-import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
-import edu.uci.ics.hivesterix.serde.lazy.LazyFactory;
-import edu.uci.ics.hivesterix.serde.lazy.LazyObject;
-import edu.uci.ics.hivesterix.serde.lazy.LazySerDe;
-import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AggregateFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
-import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyAggregateFunction;
-import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyAggregateFunctionFactory;
-import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
-
-public class AggregationFunctionFactory implements ICopyAggregateFunctionFactory {
-
-    private static final long serialVersionUID = 1L;
-
-    /**
-     * list of parameters' serialization
-     */
-    private List<String> parametersSerialization = new ArrayList<String>();
-
-    /**
-     * the name of the udf
-     */
-    private String genericUDAFName;
-
-    /**
-     * aggregation mode
-     */
-    private GenericUDAFEvaluator.Mode mode;
-
-    /**
-     * list of type info
-     */
-    private List<TypeInfo> types = new ArrayList<TypeInfo>();
-
-    /**
-     * distinct or not
-     */
-    private boolean distinct;
-
-    /**
-     * the schema of incoming rows
-     */
-    private Schema rowSchema;
-
-    /**
-     * list of parameters
-     */
-    private transient List<ExprNodeDesc> parametersOrigin;
-
-    /**
-     * row inspector
-     */
-    private transient ObjectInspector rowInspector = null;
-
-    /**
-     * output object inspector
-     */
-    private transient ObjectInspector outputInspector = null;
-
-    /**
-     * output object inspector
-     */
-    private transient ObjectInspector outputInspectorPartial = null;
-
-    /**
-     * parameter inspectors
-     */
-    private transient ObjectInspector[] parameterInspectors = null;
-
-    /**
-     * expression desc
-     */
-    private transient HashMap<Long, List<ExprNodeDesc>> parameterExprs = new HashMap<Long, List<ExprNodeDesc>>();
-
-    /**
-     * evaluators
-     */
-    private transient HashMap<Long, ExprNodeEvaluator[]> evaluators = new HashMap<Long, ExprNodeEvaluator[]>();
-
-    /**
-     * cached parameter objects
-     */
-    private transient HashMap<Long, Object[]> cachedParameters = new HashMap<Long, Object[]>();
-
-    /**
-     * cached row object: one per thread
-     */
-    private transient HashMap<Long, LazyObject<? extends ObjectInspector>> cachedRowObjects = new HashMap<Long, LazyObject<? extends ObjectInspector>>();
-
-    /**
-     * we only use lazy serde to do serialization
-     */
-    private transient HashMap<Long, SerDe> serDe = new HashMap<Long, SerDe>();
-
-    /**
-     * udaf evaluators
-     */
-    private transient HashMap<Long, GenericUDAFEvaluator> udafsPartial = new HashMap<Long, GenericUDAFEvaluator>();
-
-    /**
-     * udaf evaluators
-     */
-    private transient HashMap<Long, GenericUDAFEvaluator> udafsComplete = new HashMap<Long, GenericUDAFEvaluator>();
-
-    /**
-     * aggregation function desc
-     */
-    private transient AggregationDesc aggregator;
-
-    /**
-     * @param aggregator
-     *            Algebricks function call expression
-     * @param oi
-     *            schema
-     */
-    public AggregationFunctionFactory(AggregateFunctionCallExpression expression, Schema oi,
-            IVariableTypeEnvironment env) throws AlgebricksException {
-
-        try {
-            aggregator = (AggregationDesc) ExpressionTranslator.getHiveExpression(expression, env);
-        } catch (Exception e) {
-            e.printStackTrace();
-            throw new AlgebricksException(e.getMessage());
-        }
-        init(aggregator.getParameters(), aggregator.getGenericUDAFName(), aggregator.getMode(),
-                aggregator.getDistinct(), oi);
-    }
-
-    /**
-     * constructor of aggregation function factory
-     * 
-     * @param inputs
-     * @param name
-     * @param udafMode
-     * @param distinct
-     * @param oi
-     */
-    private void init(List<ExprNodeDesc> inputs, String name, GenericUDAFEvaluator.Mode udafMode, boolean distinct,
-            Schema oi) {
-        parametersOrigin = inputs;
-        genericUDAFName = name;
-        mode = udafMode;
-        this.distinct = distinct;
-        rowSchema = oi;
-
-        for (ExprNodeDesc input : inputs) {
-            TypeInfo type = input.getTypeInfo();
-            if (type instanceof StructTypeInfo) {
-                types.add(TypeInfoFactory.doubleTypeInfo);
-            } else
-                types.add(type);
-
-            String s = Utilities.serializeExpression(input);
-            parametersSerialization.add(s);
-        }
-    }
-
-    @Override
-    public synchronized ICopyAggregateFunction createAggregateFunction(IDataOutputProvider provider)
-            throws AlgebricksException {
-        if (parametersOrigin == null) {
-            Configuration config = new Configuration();
-            config.setClassLoader(this.getClass().getClassLoader());
-            /**
-             * in case of class.forname(...) call in hive code
-             */
-            Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
-
-            parametersOrigin = new ArrayList<ExprNodeDesc>();
-            for (String serialization : parametersSerialization) {
-                parametersOrigin.add(Utilities.deserializeExpression(serialization, config));
-            }
-        }
-
-        /**
-         * exprs
-         */
-        if (parameterExprs == null)
-            parameterExprs = new HashMap<Long, List<ExprNodeDesc>>();
-
-        /**
-         * evaluators
-         */
-        if (evaluators == null)
-            evaluators = new HashMap<Long, ExprNodeEvaluator[]>();
-
-        /**
-         * cached parameter objects
-         */
-        if (cachedParameters == null)
-            cachedParameters = new HashMap<Long, Object[]>();
-
-        /**
-         * cached row object: one per thread
-         */
-        if (cachedRowObjects == null)
-            cachedRowObjects = new HashMap<Long, LazyObject<? extends ObjectInspector>>();
-
-        /**
-         * we only use lazy serde to do serialization
-         */
-        if (serDe == null)
-            serDe = new HashMap<Long, SerDe>();
-
-        /**
-         * UDAF functions
-         */
-        if (udafsComplete == null)
-            udafsComplete = new HashMap<Long, GenericUDAFEvaluator>();
-
-        /**
-         * UDAF functions
-         */
-        if (udafsPartial == null)
-            udafsPartial = new HashMap<Long, GenericUDAFEvaluator>();
-
-        if (parameterInspectors == null)
-            parameterInspectors = new ObjectInspector[parametersOrigin.size()];
-
-        if (rowInspector == null)
-            rowInspector = rowSchema.toObjectInspector();
-
-        // get current thread id
-        long threadId = Thread.currentThread().getId();
-
-        /**
-         * expressions, expressions are thread local
-         */
-        List<ExprNodeDesc> parameters = parameterExprs.get(threadId);
-        if (parameters == null) {
-            parameters = new ArrayList<ExprNodeDesc>();
-            for (ExprNodeDesc parameter : parametersOrigin)
-                parameters.add(parameter.clone());
-            parameterExprs.put(threadId, parameters);
-        }
-
-        /**
-         * cached parameter objects
-         */
-        Object[] cachedParas = cachedParameters.get(threadId);
-        if (cachedParas == null) {
-            cachedParas = new Object[parameters.size()];
-            cachedParameters.put(threadId, cachedParas);
-        }
-
-        /**
-         * cached row object: one per thread
-         */
-        LazyObject<? extends ObjectInspector> cachedRowObject = cachedRowObjects.get(threadId);
-        if (cachedRowObject == null) {
-            cachedRowObject = LazyFactory.createLazyObject(rowInspector);
-            cachedRowObjects.put(threadId, cachedRowObject);
-        }
-
-        /**
-         * we only use lazy serde to do serialization
-         */
-        SerDe lazySer = serDe.get(threadId);
-        if (lazySer == null) {
-            lazySer = new LazySerDe();
-            serDe.put(threadId, lazySer);
-        }
-
-        /**
-         * evaluators
-         */
-        ExprNodeEvaluator[] evals = evaluators.get(threadId);
-        if (evals == null) {
-            evals = new ExprNodeEvaluator[parameters.size()];
-            evaluators.put(threadId, evals);
-        }
-
-        GenericUDAFEvaluator udafPartial;
-        GenericUDAFEvaluator udafComplete;
-
-        // initialize object inspectors
-        try {
-            /**
-             * evaluators, udf, object inpsectors are shared in one thread
-             */
-            for (int i = 0; i < evals.length; i++) {
-                if (evals[i] == null) {
-                    evals[i] = ExprNodeEvaluatorFactory.get(parameters.get(i));
-                    if (parameterInspectors[i] == null) {
-                        parameterInspectors[i] = evals[i].initialize(rowInspector);
-                    } else {
-                        evals[i].initialize(rowInspector);
-                    }
-                }
-            }
-
-            udafComplete = udafsComplete.get(threadId);
-            if (udafComplete == null) {
-                try {
-                    udafComplete = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, types, distinct, false);
-                } catch (HiveException e) {
-                    throw new AlgebricksException(e);
-                }
-                udafsComplete.put(threadId, udafComplete);
-                udafComplete.init(mode, parameterInspectors);
-            }
-
-            // multiple stage group by, determined by the mode parameter
-            if (outputInspector == null)
-                outputInspector = udafComplete.init(mode, parameterInspectors);
-
-            // initial partial gby udaf
-            GenericUDAFEvaluator.Mode partialMode;
-            // adjust mode for external groupby
-            if (mode == GenericUDAFEvaluator.Mode.COMPLETE)
-                partialMode = GenericUDAFEvaluator.Mode.PARTIAL1;
-            else if (mode == GenericUDAFEvaluator.Mode.FINAL)
-                partialMode = GenericUDAFEvaluator.Mode.PARTIAL2;
-            else
-                partialMode = mode;
-            udafPartial = udafsPartial.get(threadId);
-            if (udafPartial == null) {
-                try {
-                    udafPartial = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, types, distinct, false);
-                } catch (HiveException e) {
-                    throw new AlgebricksException(e);
-                }
-                udafPartial.init(partialMode, parameterInspectors);
-                udafsPartial.put(threadId, udafPartial);
-            }
-
-            // multiple stage group by, determined by the mode parameter
-            if (outputInspectorPartial == null)
-                outputInspectorPartial = udafPartial.init(partialMode, parameterInspectors);
-        } catch (Exception e) {
-            e.printStackTrace();
-            throw new AlgebricksException(e);
-        }
-
-        return new AggregationFunctionEvaluator(parameters, types, genericUDAFName, mode, distinct, rowInspector,
-                provider.getDataOutput(), evals, parameterInspectors, cachedParas, lazySer, cachedRowObject,
-                udafPartial, udafComplete, outputInspector, outputInspectorPartial);
-    }
-
-    public String toString() {
-        return "aggregation function expression evaluator factory: " + this.genericUDAFName;
-    }
-}
+package edu.uci.ics.hivesterix.runtime.factory.evaluator;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator;
+import org.apache.hadoop.hive.ql.exec.ExprNodeEvaluatorFactory;
+import org.apache.hadoop.hive.ql.exec.FunctionRegistry;
+import org.apache.hadoop.hive.ql.exec.Utilities;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.ql.plan.AggregationDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator;
+import org.apache.hadoop.hive.serde2.SerDe;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
+
+import edu.uci.ics.hivesterix.logical.expression.ExpressionTranslator;
+import edu.uci.ics.hivesterix.runtime.evaluator.AggregationFunctionEvaluator;
+import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
+import edu.uci.ics.hivesterix.serde.lazy.LazyFactory;
+import edu.uci.ics.hivesterix.serde.lazy.LazyObject;
+import edu.uci.ics.hivesterix.serde.lazy.LazySerDe;
+import edu.uci.ics.hivesterix.serde.lazy.LazyUtils;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AggregateFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyAggregateFunction;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyAggregateFunctionFactory;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+
+@SuppressWarnings("deprecation")
+public class AggregationFunctionFactory implements ICopyAggregateFunctionFactory {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * list of parameters' serialization
+     */
+    private List<String> parametersSerialization = new ArrayList<String>();
+
+    /**
+     * the name of the udf
+     */
+    private String genericUDAFName;
+
+    /**
+     * aggregation mode
+     */
+    private GenericUDAFEvaluator.Mode mode;
+
+    /**
+     * list of type info
+     */
+    private List<TypeInfo> types = new ArrayList<TypeInfo>();
+
+    /**
+     * distinct or not
+     */
+    private boolean distinct;
+
+    /**
+     * the schema of incoming rows
+     */
+    private Schema rowSchema;
+
+    /**
+     * list of parameters
+     */
+    private transient List<ExprNodeDesc> parametersOrigin;
+
+    /**
+     * row inspector
+     */
+    private transient ObjectInspector rowInspector = null;
+
+    /**
+     * output object inspector
+     */
+    private transient ObjectInspector outputInspector = null;
+
+    /**
+     * output object inspector
+     */
+    private transient ObjectInspector outputInspectorPartial = null;
+
+    /**
+     * parameter inspectors
+     */
+    private transient ObjectInspector[] parameterInspectors = null;
+
+    /**
+     * expression desc
+     */
+    private transient HashMap<Long, List<ExprNodeDesc>> parameterExprs = new HashMap<Long, List<ExprNodeDesc>>();
+
+    /**
+     * evaluators
+     */
+    private transient HashMap<Long, ExprNodeEvaluator[]> evaluators = new HashMap<Long, ExprNodeEvaluator[]>();
+
+    /**
+     * cached parameter objects
+     */
+    private transient HashMap<Long, Object[]> cachedParameters = new HashMap<Long, Object[]>();
+
+    /**
+     * cached row object: one per thread
+     */
+    private transient HashMap<Long, LazyObject<? extends ObjectInspector>> cachedRowObjects = new HashMap<Long, LazyObject<? extends ObjectInspector>>();
+
+    /**
+     * we only use lazy serde to do serialization
+     */
+    private transient HashMap<Long, SerDe> serDe = new HashMap<Long, SerDe>();
+
+    /**
+     * udaf evaluators
+     */
+    private transient HashMap<Long, GenericUDAFEvaluator> udafsPartial = new HashMap<Long, GenericUDAFEvaluator>();
+
+    /**
+     * udaf evaluators
+     */
+    private transient HashMap<Long, GenericUDAFEvaluator> udafsComplete = new HashMap<Long, GenericUDAFEvaluator>();
+
+    /**
+     * aggregation function desc
+     */
+    private transient AggregationDesc aggregator;
+
+    /**
+     * @param aggregator
+     *            Algebricks function call expression
+     * @param oi
+     *            schema
+     */
+    public AggregationFunctionFactory(AggregateFunctionCallExpression expression, Schema oi,
+            IVariableTypeEnvironment env) throws AlgebricksException {
+
+        try {
+            aggregator = (AggregationDesc) ExpressionTranslator.getHiveExpression(expression, env);
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new AlgebricksException(e.getMessage());
+        }
+        init(aggregator.getParameters(), aggregator.getGenericUDAFName(), aggregator.getMode(),
+                aggregator.getDistinct(), oi);
+    }
+
+    /**
+     * constructor of aggregation function factory
+     * 
+     * @param inputs
+     * @param name
+     * @param udafMode
+     * @param distinct
+     * @param oi
+     */
+    private void init(List<ExprNodeDesc> inputs, String name, GenericUDAFEvaluator.Mode udafMode, boolean distinct,
+            Schema oi) {
+        parametersOrigin = inputs;
+        genericUDAFName = name;
+        mode = udafMode;
+        this.distinct = distinct;
+        rowSchema = oi;
+
+        for (ExprNodeDesc input : inputs) {
+            TypeInfo type = input.getTypeInfo();
+            if (type instanceof StructTypeInfo) {
+                types.add(TypeInfoFactory.doubleTypeInfo);
+            } else {
+                types.add(type);
+            }
+
+            String s = Utilities.serializeExpression(input);
+            parametersSerialization.add(s);
+        }
+    }
+
+    @Override
+    public synchronized ICopyAggregateFunction createAggregateFunction(IDataOutputProvider provider)
+            throws AlgebricksException {
+        /**
+         * list of object inspectors correlated to types
+         */
+        List<ObjectInspector> oiListForTypes = new ArrayList<ObjectInspector>();
+        for (TypeInfo type : types) {
+            oiListForTypes.add(LazyUtils.getLazyObjectInspectorFromTypeInfo(type, false));
+        }
+
+        if (parametersOrigin == null) {
+            Configuration config = new Configuration();
+            config.setClassLoader(this.getClass().getClassLoader());
+            /**
+             * in case of class.forname(...) call in hive code
+             */
+            Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
+
+            parametersOrigin = new ArrayList<ExprNodeDesc>();
+            for (String serialization : parametersSerialization) {
+                parametersOrigin.add(Utilities.deserializeExpression(serialization, config));
+            }
+        }
+
+        /**
+         * exprs
+         */
+        if (parameterExprs == null)
+            parameterExprs = new HashMap<Long, List<ExprNodeDesc>>();
+
+        /**
+         * evaluators
+         */
+        if (evaluators == null)
+            evaluators = new HashMap<Long, ExprNodeEvaluator[]>();
+
+        /**
+         * cached parameter objects
+         */
+        if (cachedParameters == null)
+            cachedParameters = new HashMap<Long, Object[]>();
+
+        /**
+         * cached row object: one per thread
+         */
+        if (cachedRowObjects == null)
+            cachedRowObjects = new HashMap<Long, LazyObject<? extends ObjectInspector>>();
+
+        /**
+         * we only use lazy serde to do serialization
+         */
+        if (serDe == null)
+            serDe = new HashMap<Long, SerDe>();
+
+        /**
+         * UDAF functions
+         */
+        if (udafsComplete == null)
+            udafsComplete = new HashMap<Long, GenericUDAFEvaluator>();
+
+        /**
+         * UDAF functions
+         */
+        if (udafsPartial == null)
+            udafsPartial = new HashMap<Long, GenericUDAFEvaluator>();
+
+        if (parameterInspectors == null)
+            parameterInspectors = new ObjectInspector[parametersOrigin.size()];
+
+        if (rowInspector == null)
+            rowInspector = rowSchema.toObjectInspector();
+
+        // get current thread id
+        long threadId = Thread.currentThread().getId();
+
+        /**
+         * expressions, expressions are thread local
+         */
+        List<ExprNodeDesc> parameters = parameterExprs.get(threadId);
+        if (parameters == null) {
+            parameters = new ArrayList<ExprNodeDesc>();
+            for (ExprNodeDesc parameter : parametersOrigin)
+                parameters.add(parameter.clone());
+            parameterExprs.put(threadId, parameters);
+        }
+
+        /**
+         * cached parameter objects
+         */
+        Object[] cachedParas = cachedParameters.get(threadId);
+        if (cachedParas == null) {
+            cachedParas = new Object[parameters.size()];
+            cachedParameters.put(threadId, cachedParas);
+        }
+
+        /**
+         * cached row object: one per thread
+         */
+        LazyObject<? extends ObjectInspector> cachedRowObject = cachedRowObjects.get(threadId);
+        if (cachedRowObject == null) {
+            cachedRowObject = LazyFactory.createLazyObject(rowInspector);
+            cachedRowObjects.put(threadId, cachedRowObject);
+        }
+
+        /**
+         * we only use lazy serde to do serialization
+         */
+        SerDe lazySer = serDe.get(threadId);
+        if (lazySer == null) {
+            lazySer = new LazySerDe();
+            serDe.put(threadId, lazySer);
+        }
+
+        /**
+         * evaluators
+         */
+        ExprNodeEvaluator[] evals = evaluators.get(threadId);
+        if (evals == null) {
+            evals = new ExprNodeEvaluator[parameters.size()];
+            evaluators.put(threadId, evals);
+        }
+
+        GenericUDAFEvaluator udafPartial;
+        GenericUDAFEvaluator udafComplete;
+
+        // initialize object inspectors
+        try {
+            /**
+             * evaluators, udf, object inpsectors are shared in one thread
+             */
+            for (int i = 0; i < evals.length; i++) {
+                if (evals[i] == null) {
+                    evals[i] = ExprNodeEvaluatorFactory.get(parameters.get(i));
+                    if (parameterInspectors[i] == null) {
+                        parameterInspectors[i] = evals[i].initialize(rowInspector);
+                    } else {
+                        evals[i].initialize(rowInspector);
+                    }
+                }
+            }
+
+            udafComplete = udafsComplete.get(threadId);
+            if (udafComplete == null) {
+                try {
+                    udafComplete = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, oiListForTypes, distinct,
+                            false);
+                } catch (HiveException e) {
+                    throw new AlgebricksException(e);
+                }
+                udafsComplete.put(threadId, udafComplete);
+                udafComplete.init(mode, parameterInspectors);
+            }
+
+            // multiple stage group by, determined by the mode parameter
+            if (outputInspector == null)
+                outputInspector = udafComplete.init(mode, parameterInspectors);
+
+            // initial partial gby udaf
+            GenericUDAFEvaluator.Mode partialMode;
+            // adjust mode for external groupby
+            if (mode == GenericUDAFEvaluator.Mode.COMPLETE)
+                partialMode = GenericUDAFEvaluator.Mode.PARTIAL1;
+            else if (mode == GenericUDAFEvaluator.Mode.FINAL)
+                partialMode = GenericUDAFEvaluator.Mode.PARTIAL2;
+            else
+                partialMode = mode;
+            udafPartial = udafsPartial.get(threadId);
+            if (udafPartial == null) {
+                try {
+                    udafPartial = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, oiListForTypes, distinct,
+                            false);
+                } catch (HiveException e) {
+                    throw new AlgebricksException(e);
+                }
+                udafPartial.init(partialMode, parameterInspectors);
+                udafsPartial.put(threadId, udafPartial);
+            }
+
+            // multiple stage group by, determined by the mode parameter
+            if (outputInspectorPartial == null)
+                outputInspectorPartial = udafPartial.init(partialMode, parameterInspectors);
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new AlgebricksException(e);
+        }
+
+        return new AggregationFunctionEvaluator(parameters, types, genericUDAFName, mode, distinct, rowInspector,
+                provider.getDataOutput(), evals, parameterInspectors, cachedParas, lazySer, cachedRowObject,
+                udafPartial, udafComplete, outputInspector, outputInspectorPartial);
+    }
+
+    public String toString() {
+        return "aggregation function expression evaluator factory: " + this.genericUDAFName;
+    }
+}
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionSerializableFactory.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionSerializableFactory.java
index 71d11c0..c1ee814 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionSerializableFactory.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionSerializableFactory.java
@@ -39,12 +39,14 @@
 import edu.uci.ics.hivesterix.serde.lazy.LazyFactory;
 import edu.uci.ics.hivesterix.serde.lazy.LazyObject;
 import edu.uci.ics.hivesterix.serde.lazy.LazySerDe;
+import edu.uci.ics.hivesterix.serde.lazy.LazyUtils;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
 import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AggregateFunctionCallExpression;
 import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
 import edu.uci.ics.hyracks.algebricks.runtime.base.ICopySerializableAggregateFunction;
 import edu.uci.ics.hyracks.algebricks.runtime.base.ICopySerializableAggregateFunctionFactory;
 
+@SuppressWarnings("deprecation")
 public class AggregationFunctionSerializableFactory implements ICopySerializableAggregateFunctionFactory {
 
     private static final long serialVersionUID = 1L;
@@ -190,10 +192,19 @@
             String s = Utilities.serializeExpression(input);
             parametersSerialization.add(s);
         }
+
     }
 
     @Override
     public synchronized ICopySerializableAggregateFunction createAggregateFunction() throws AlgebricksException {
+        /**
+         * list of object inspectors correlated to types
+         */
+        List<ObjectInspector> oiListForTypes = new ArrayList<ObjectInspector>();
+        for (TypeInfo type : types) {
+            oiListForTypes.add(LazyUtils.getLazyObjectInspectorFromTypeInfo(type, false));
+        }
+
         if (parametersOrigin == null) {
             Configuration config = new Configuration();
             config.setClassLoader(this.getClass().getClassLoader());
@@ -328,7 +339,8 @@
             udafComplete = udafsComplete.get(threadId);
             if (udafComplete == null) {
                 try {
-                    udafComplete = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, types, distinct, false);
+                    udafComplete = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, oiListForTypes, distinct,
+                            false);
                 } catch (HiveException e) {
                     throw new AlgebricksException(e);
                 }
@@ -352,7 +364,8 @@
             udafPartial = udafsPartial.get(threadId);
             if (udafPartial == null) {
                 try {
-                    udafPartial = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, types, distinct, false);
+                    udafPartial = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, oiListForTypes, distinct,
+                            false);
                 } catch (HiveException e) {
                     throw new AlgebricksException(e);
                 }
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/operator/filewrite/HiveFileWritePushRuntime.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/operator/filewrite/HiveFileWritePushRuntime.java
index e89a4c4..4bbb21f 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/operator/filewrite/HiveFileWritePushRuntime.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/operator/filewrite/HiveFileWritePushRuntime.java
@@ -12,156 +12,176 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.runtime.operator.filewrite;
-
-import java.nio.ByteBuffer;
-
-import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
-import org.apache.hadoop.hive.ql.exec.OperatorFactory;
-import org.apache.hadoop.hive.ql.exec.RowSchema;
-import org.apache.hadoop.hive.ql.metadata.HiveException;
-import org.apache.hadoop.hive.ql.plan.FileSinkDesc;
-import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
-import org.apache.hadoop.mapred.JobConf;
-
-import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
-import edu.uci.ics.hivesterix.serde.lazy.LazyColumnar;
-import edu.uci.ics.hivesterix.serde.lazy.objectinspector.LazyColumnarObjectInspector;
-import edu.uci.ics.hyracks.algebricks.runtime.base.IPushRuntime;
-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.common.comm.io.FrameTupleAccessor;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference;
-
-@SuppressWarnings("deprecation")
-public class HiveFileWritePushRuntime implements IPushRuntime {
-
-	/**
-	 * frame tuple accessor to access byte buffer
-	 */
-	private final FrameTupleAccessor accessor;
-
-	/**
-	 * input object inspector
-	 */
-	private final ObjectInspector inputInspector;
-
-	/**
-	 * cachedInput
-	 */
-	private final LazyColumnar cachedInput;
-
-	/**
-	 * File sink operator of Hive
-	 */
-	private final FileSinkDesc fileSink;
-
-	/**
-	 * job configuration, which contain name node and other configuration
-	 * information
-	 */
-	private JobConf conf;
-
-	/**
-	 * input object inspector
-	 */
-	private final Schema inputSchema;
-
-	/**
-	 * a copy of hive schema representation
-	 */
-	private RowSchema rowSchema;
-
-	/**
-	 * the Hive file sink operator
-	 */
-	private FileSinkOperator fsOp;
-
-	/**
-	 * cached tuple object reference
-	 */
-	private FrameTupleReference tuple = new FrameTupleReference();
-
-	/**
-	 * @param spec
-	 * @param fsProvider
-	 */
-	public HiveFileWritePushRuntime(IHyracksTaskContext context,
-			RecordDescriptor inputRecordDesc, JobConf job, FileSinkDesc fs,
-			RowSchema schema, Schema oi) {
-		fileSink = fs;
-		fileSink.setGatherStats(false);
-
-		rowSchema = schema;
-		conf = job;
-		inputSchema = oi;
-
-		accessor = new FrameTupleAccessor(context.getFrameSize(),
-				inputRecordDesc);
-		inputInspector = inputSchema.toObjectInspector();
-		cachedInput = new LazyColumnar(
-				(LazyColumnarObjectInspector) inputInspector);
-	}
-
-	@Override
-	public void open() throws HyracksDataException {
-		fsOp = (FileSinkOperator) OperatorFactory.get(fileSink, rowSchema);
-		fsOp.setChildOperators(null);
-		fsOp.setParentOperators(null);
-		conf.setClassLoader(this.getClass().getClassLoader());
-
-		ObjectInspector[] inspectors = new ObjectInspector[1];
-		inspectors[0] = inputInspector;
-		try {
-			fsOp.initialize(conf, inspectors);
-			fsOp.setExecContext(null);
-		} catch (Exception e) {
-			e.printStackTrace();
-		}
-	}
-
-	@Override
-	public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
-		accessor.reset(buffer);
-		int n = accessor.getTupleCount();
-		try {
-			for (int i = 0; i < n; ++i) {
-				tuple.reset(accessor, i);
-				cachedInput.init(tuple);
-				fsOp.process(cachedInput, 0);
-			}
-		} catch (HiveException e) {
-			throw new HyracksDataException(e);
-		}
-	}
-
-	@Override
-	public void close() throws HyracksDataException {
-		try {
-			Thread.currentThread().setContextClassLoader(
-					this.getClass().getClassLoader());
-			fsOp.closeOp(false);
-		} catch (HiveException e) {
-			throw new HyracksDataException(e);
-		}
-	}
-
-	@Override
-	public void setFrameWriter(int index, IFrameWriter writer,
-			RecordDescriptor recordDesc) {
-		throw new IllegalStateException();
-	}
-
-	@Override
-	public void setInputRecordDescriptor(int index,
-			RecordDescriptor recordDescriptor) {
-	}
-
-	@Override
-	public void fail() throws HyracksDataException {
-
-	}
-
-}
+package edu.uci.ics.hivesterix.runtime.operator.filewrite;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.logging.Logger;
+
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
+import org.apache.hadoop.hive.ql.exec.OperatorFactory;
+import org.apache.hadoop.hive.ql.exec.RowSchema;
+import org.apache.hadoop.hive.ql.exec.Utilities;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.ql.plan.FileSinkDesc;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.shims.ShimLoader;
+import org.apache.hadoop.mapred.JobConf;
+
+import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
+import edu.uci.ics.hivesterix.serde.lazy.LazyColumnar;
+import edu.uci.ics.hivesterix.serde.lazy.objectinspector.LazyColumnarObjectInspector;
+import edu.uci.ics.hyracks.algebricks.runtime.base.IPushRuntime;
+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.common.comm.io.FrameTupleAccessor;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference;
+
+@SuppressWarnings("deprecation")
+public class HiveFileWritePushRuntime implements IPushRuntime {
+    private final static Logger LOGGER = Logger.getLogger(HiveFileWritePushRuntime.class.getName());
+
+    /**
+     * frame tuple accessor to access byte buffer
+     */
+    private final FrameTupleAccessor accessor;
+
+    /**
+     * input object inspector
+     */
+    private final ObjectInspector inputInspector;
+
+    /**
+     * cachedInput
+     */
+    private final LazyColumnar cachedInput;
+
+    /**
+     * File sink operator of Hive
+     */
+    private final FileSinkDesc fileSink;
+
+    /**
+     * job configuration, which contain name node and other configuration
+     * information
+     */
+    private JobConf conf;
+
+    /**
+     * input object inspector
+     */
+    private final Schema inputSchema;
+
+    /**
+     * a copy of hive schema representation
+     */
+    private RowSchema rowSchema;
+
+    /**
+     * the Hive file sink operator
+     */
+    private FileSinkOperator fsOp;
+
+    /**
+     * cached tuple object reference
+     */
+    private FrameTupleReference tuple = new FrameTupleReference();
+
+    /**
+     * @param spec
+     * @param fsProvider
+     */
+    public HiveFileWritePushRuntime(IHyracksTaskContext context, RecordDescriptor inputRecordDesc, JobConf job,
+            FileSinkDesc fs, RowSchema schema, Schema oi) {
+        fileSink = fs;
+        fileSink.setGatherStats(false);
+
+        rowSchema = schema;
+        conf = job;
+        inputSchema = oi;
+
+        accessor = new FrameTupleAccessor(context.getFrameSize(), inputRecordDesc);
+        inputInspector = inputSchema.toObjectInspector();
+        cachedInput = new LazyColumnar((LazyColumnarObjectInspector) inputInspector);
+    }
+
+    @Override
+    public void open() throws HyracksDataException {
+        fsOp = (FileSinkOperator) OperatorFactory.get(fileSink, rowSchema);
+        fsOp.setChildOperators(null);
+        fsOp.setParentOperators(null);
+        conf.setClassLoader(this.getClass().getClassLoader());
+
+        ObjectInspector[] inspectors = new ObjectInspector[1];
+        inspectors[0] = inputInspector;
+        try {
+            fsOp.initialize(conf, inspectors);
+            fsOp.setExecContext(null);
+            createTempDir();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+        accessor.reset(buffer);
+        int n = accessor.getTupleCount();
+        try {
+            for (int i = 0; i < n; ++i) {
+                tuple.reset(accessor, i);
+                cachedInput.init(tuple);
+                fsOp.process(cachedInput, 0);
+            }
+        } catch (HiveException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        try {
+            Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
+            fsOp.closeOp(false);
+        } catch (HiveException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public void setFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc) {
+        throw new IllegalStateException();
+    }
+
+    @Override
+    public void setInputRecordDescriptor(int index, RecordDescriptor recordDescriptor) {
+    }
+
+    @Override
+    public void fail() throws HyracksDataException {
+
+    }
+
+    private void createTempDir() throws IOException {
+        FileSinkDesc fdesc = fsOp.getConf();
+        String tempDir = fdesc.getDirName();
+        if (tempDir != null) {
+            Path tempPath = Utilities.toTempPath(new Path(tempDir));
+            FileSystem fs = tempPath.getFileSystem(conf);
+            if (!fs.exists(tempPath)) {
+                try {
+                    fs.mkdirs(tempPath);
+                    ShimLoader.getHadoopShims().fileSystemDeleteOnExit(fs, tempPath);
+                } catch (IOException e) {
+                    //if the dir already exists, that should be fine; so log a warning msg
+                    LOGGER.warning("create tmp result directory fails.");
+                }
+            }
+        }
+    }
+
+}
diff --git a/hivesterix/hivesterix-serde/pom.xml b/hivesterix/hivesterix-serde/pom.xml
index 97c9174..b53661b 100644
--- a/hivesterix/hivesterix-serde/pom.xml
+++ b/hivesterix/hivesterix-serde/pom.xml
@@ -18,7 +18,7 @@
 	<parent>
 		<artifactId>hivesterix</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 
 	<artifactId>hivesterix-serde</artifactId>
@@ -42,37 +42,37 @@
 
 	<dependencies>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-serde</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-common</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-                        <groupId>edu.uci.ics.hyracks</groupId>
-                        <artifactId>hivesterix-common</artifactId>
-                        <version>0.2.7-SNAPSHOT</version>
-                        <type>jar</type>
-                        <scope>compile</scope>
-                </dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-hdfs-core</artifactId>
+			<version>0.2.10-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
-			<version>3.8.1</version>
+			<version>4.8.1</version>
 			<scope>test</scope>
 		</dependency>
 	</dependencies>
diff --git a/hivesterix/hivesterix-serde/src/main/java/edu/uci/ics/hivesterix/serde/lazy/LazySerDe.java b/hivesterix/hivesterix-serde/src/main/java/edu/uci/ics/hivesterix/serde/lazy/LazySerDe.java
index b5d64e8..2bbb1d5 100644
--- a/hivesterix/hivesterix-serde/src/main/java/edu/uci/ics/hivesterix/serde/lazy/LazySerDe.java
+++ b/hivesterix/hivesterix-serde/src/main/java/edu/uci/ics/hivesterix/serde/lazy/LazySerDe.java
@@ -46,6 +46,7 @@
 import org.apache.hadoop.hive.serde2.ByteStream.Output;
 import org.apache.hadoop.hive.serde2.SerDe;
 import org.apache.hadoop.hive.serde2.SerDeException;
+import org.apache.hadoop.hive.serde2.SerDeStats;
 import org.apache.hadoop.hive.serde2.objectinspector.ListObjectInspector;
 import org.apache.hadoop.hive.serde2.objectinspector.MapObjectInspector;
 import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
@@ -74,6 +75,7 @@
  * deserialized until required. Binary means a field is serialized in binary
  * compact format.
  */
+@SuppressWarnings("deprecation")
 public class LazySerDe implements SerDe {
 
     public static final Log LOG = LogFactory.getLog(LazySerDe.class.getName());
@@ -140,7 +142,6 @@
     /**
      * Deserialize a table record to a Lazy struct.
      */
-    @SuppressWarnings("deprecation")
     @Override
     public Object deserialize(Writable field) throws SerDeException {
         if (byteArrayRef == null) {
@@ -471,4 +472,9 @@
             }
         }
     }
+
+	@Override
+	public SerDeStats getSerDeStats() {
+		return null;
+	}
 }
diff --git a/hivesterix/hivesterix-translator/pom.xml b/hivesterix/hivesterix-translator/pom.xml
index 8a24d5e..d8c205f 100644
--- a/hivesterix/hivesterix-translator/pom.xml
+++ b/hivesterix/hivesterix-translator/pom.xml
@@ -21,7 +21,7 @@
 	<parent>
 		<artifactId>hivesterix</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -42,30 +42,23 @@
 
 	<dependencies>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-exec</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-common</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-runtime</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/HiveAlgebricksTranslator.java b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/HiveAlgebricksTranslator.java
index f32d85b..76cc51d 100644
--- a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/HiveAlgebricksTranslator.java
+++ b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/HiveAlgebricksTranslator.java
@@ -12,810 +12,809 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.logical.plan;
-
-import java.io.OutputStreamWriter;
-import java.io.PrintWriter;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Set;
-
-import org.apache.commons.lang3.mutable.Mutable;
-import org.apache.commons.lang3.mutable.MutableObject;
-import org.apache.hadoop.hive.ql.exec.ColumnInfo;
-import org.apache.hadoop.hive.ql.exec.ExtractOperator;
-import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
-import org.apache.hadoop.hive.ql.exec.FilterOperator;
-import org.apache.hadoop.hive.ql.exec.GroupByOperator;
-import org.apache.hadoop.hive.ql.exec.JoinOperator;
-import org.apache.hadoop.hive.ql.exec.LateralViewJoinOperator;
-import org.apache.hadoop.hive.ql.exec.LimitOperator;
-import org.apache.hadoop.hive.ql.exec.MapJoinOperator;
-import org.apache.hadoop.hive.ql.exec.Operator;
-import org.apache.hadoop.hive.ql.exec.ReduceSinkOperator;
-import org.apache.hadoop.hive.ql.exec.SelectOperator;
-import org.apache.hadoop.hive.ql.exec.TableScanOperator;
-import org.apache.hadoop.hive.ql.exec.UDF;
-import org.apache.hadoop.hive.ql.exec.UDTFOperator;
-import org.apache.hadoop.hive.ql.exec.UnionOperator;
-import org.apache.hadoop.hive.ql.plan.AggregationDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeColumnDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeFieldDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeNullDesc;
-import org.apache.hadoop.hive.ql.plan.PartitionDesc;
-import org.apache.hadoop.hive.ql.plan.UDTFDesc;
-import org.apache.hadoop.hive.ql.plan.api.OperatorType;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDFBridge;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
-
-import edu.uci.ics.hivesterix.logical.expression.ExpressionConstant;
-import edu.uci.ics.hivesterix.logical.expression.HiveAlgebricksBuiltInFunctionMap;
-import edu.uci.ics.hivesterix.logical.expression.HiveFunctionInfo;
-import edu.uci.ics.hivesterix.logical.expression.HivesterixConstantValue;
-import edu.uci.ics.hivesterix.logical.plan.visitor.ExtractVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.FilterVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.GroupByVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.JoinVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.LateralViewJoinVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.LimitVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.MapJoinVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.ProjectVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.SortVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.TableScanWriteVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.UnionVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.Visitor;
-import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
-import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
-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.ILogicalPlan;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AggregateFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ConstantExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ScalarFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.UnnestingFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
-import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AssignOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ReplicateOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.plan.ALogicalPlanImpl;
-import edu.uci.ics.hyracks.algebricks.core.algebra.prettyprint.LogicalOperatorPrettyPrintVisitor;
-import edu.uci.ics.hyracks.algebricks.core.algebra.prettyprint.PlanPrettyPrinter;
-
-@SuppressWarnings("rawtypes")
-public class HiveAlgebricksTranslator implements Translator {
-
-    private int currentVariable = 0;
-
-    private List<Mutable<ILogicalOperator>> logicalOp = new ArrayList<Mutable<ILogicalOperator>>();
-
-    private boolean continueTraverse = true;
-
-    private IMetadataProvider<PartitionDesc, Object> metaData;
-
-    /**
-     * map variable name to the logical variable
-     */
-    private HashMap<String, LogicalVariable> nameToLogicalVariableMap = new HashMap<String, LogicalVariable>();
-
-    /**
-     * map field name to LogicalVariable
-     */
-    private HashMap<String, LogicalVariable> fieldToLogicalVariableMap = new HashMap<String, LogicalVariable>();
-
-    /**
-     * map logical variable to name
-     */
-    private HashMap<LogicalVariable, String> logicalVariableToFieldMap = new HashMap<LogicalVariable, String>();
-
-    /**
-     * asterix root operators
-     */
-    private List<Mutable<ILogicalOperator>> rootOperators = new ArrayList<Mutable<ILogicalOperator>>();
-
-    /**
-     * a list of visitors
-     */
-    private List<Visitor> visitors = new ArrayList<Visitor>();
-
-    /**
-     * output writer to print things out
-     */
-    private static PrintWriter outputWriter = new PrintWriter(new OutputStreamWriter(System.out));
-
-    /**
-     * map a logical variable to type info
-     */
-    private HashMap<LogicalVariable, TypeInfo> variableToType = new HashMap<LogicalVariable, TypeInfo>();
-
-    @Override
-    public LogicalVariable getVariable(String fieldName, TypeInfo type) {
-        LogicalVariable var = fieldToLogicalVariableMap.get(fieldName);
-        if (var == null) {
-            currentVariable++;
-            var = new LogicalVariable(currentVariable);
-            fieldToLogicalVariableMap.put(fieldName, var);
-            nameToLogicalVariableMap.put(var.toString(), var);
-            variableToType.put(var, type);
-            logicalVariableToFieldMap.put(var, fieldName);
-        }
-        return var;
-    }
-
-    @Override
-    public LogicalVariable getNewVariable(String fieldName, TypeInfo type) {
-        currentVariable++;
-        LogicalVariable var = new LogicalVariable(currentVariable);
-        fieldToLogicalVariableMap.put(fieldName, var);
-        nameToLogicalVariableMap.put(var.toString(), var);
-        variableToType.put(var, type);
-        logicalVariableToFieldMap.put(var, fieldName);
-        return var;
-    }
-
-    @Override
-    public void replaceVariable(LogicalVariable oldVar, LogicalVariable newVar) {
-        String name = this.logicalVariableToFieldMap.get(oldVar);
-        if (name != null) {
-            fieldToLogicalVariableMap.put(name, newVar);
-            nameToLogicalVariableMap.put(newVar.toString(), newVar);
-            nameToLogicalVariableMap.put(oldVar.toString(), newVar);
-            logicalVariableToFieldMap.put(newVar, name);
-        }
-    }
-
-    @Override
-    public IMetadataProvider<PartitionDesc, Object> getMetadataProvider() {
-        return metaData;
-    }
-
-    /**
-     * only get an variable, without rewriting it
-     * 
-     * @param fieldName
-     * @return
-     */
-    private LogicalVariable getVariableOnly(String fieldName) {
-        return fieldToLogicalVariableMap.get(fieldName);
-    }
-
-    private void updateVariable(String fieldName, LogicalVariable variable) {
-        LogicalVariable var = fieldToLogicalVariableMap.get(fieldName);
-        if (var == null) {
-            fieldToLogicalVariableMap.put(fieldName, variable);
-            nameToLogicalVariableMap.put(fieldName, variable);
-        } else if (!var.equals(variable)) {
-            fieldToLogicalVariableMap.put(fieldName, variable);
-            nameToLogicalVariableMap.put(fieldName, variable);
-        }
-    }
-
-    /**
-     * get a list of logical variables from the schema
-     * 
-     * @param schema
-     * @return
-     */
-    @Override
-    public List<LogicalVariable> getVariablesFromSchema(Schema schema) {
-        List<LogicalVariable> variables = new ArrayList<LogicalVariable>();
-        List<String> names = schema.getNames();
-
-        for (String name : names)
-            variables.add(nameToLogicalVariableMap.get(name));
-        return variables;
-    }
-
-    /**
-     * get variable to typeinfo map
-     * 
-     * @return
-     */
-    public HashMap<LogicalVariable, TypeInfo> getVariableContext() {
-        return this.variableToType;
-    }
-
-    /**
-     * get the number of variables s
-     * 
-     * @return
-     */
-    public int getVariableCounter() {
-        return currentVariable + 1;
-    }
-
-    /**
-     * translate from hive operator tree to asterix operator tree
-     * 
-     * @param hive
-     *            roots
-     * @return Algebricks roots
-     */
-    public void translate(List<Operator> hiveRoot, ILogicalOperator parentOperator,
-            HashMap<String, PartitionDesc> aliasToPathMap) throws AlgebricksException {
-        /**
-         * register visitors
-         */
-        visitors.add(new FilterVisitor());
-        visitors.add(new GroupByVisitor());
-        visitors.add(new JoinVisitor());
-        visitors.add(new LateralViewJoinVisitor());
-        visitors.add(new UnionVisitor());
-        visitors.add(new LimitVisitor());
-        visitors.add(new MapJoinVisitor());
-        visitors.add(new ProjectVisitor());
-        visitors.add(new SortVisitor());
-        visitors.add(new ExtractVisitor());
-        visitors.add(new TableScanWriteVisitor(aliasToPathMap));
-
-        List<Mutable<ILogicalOperator>> refList = translate(hiveRoot, new MutableObject<ILogicalOperator>(
-                parentOperator));
-        insertReplicateOperator(refList);
-        if (refList != null)
-            rootOperators.addAll(refList);
-    }
-
-    /**
-     * translate operator DAG
-     * 
-     * @param hiveRoot
-     * @param AlgebricksParentOperator
-     * @return
-     */
-    private List<Mutable<ILogicalOperator>> translate(List<Operator> hiveRoot,
-            Mutable<ILogicalOperator> AlgebricksParentOperator) throws AlgebricksException {
-
-        for (Operator hiveOperator : hiveRoot) {
-            continueTraverse = true;
-            Mutable<ILogicalOperator> currentOperatorRef = null;
-            if (hiveOperator.getType() == OperatorType.FILTER) {
-                FilterOperator fop = (FilterOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.REDUCESINK) {
-                ReduceSinkOperator fop = (ReduceSinkOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.JOIN) {
-                JoinOperator fop = (JoinOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null) {
-                        continueTraverse = true;
-                        break;
-                    } else
-                        continueTraverse = false;
-                }
-                if (currentOperatorRef == null)
-                    return null;
-            } else if (hiveOperator.getType() == OperatorType.LATERALVIEWJOIN) {
-                LateralViewJoinOperator fop = (LateralViewJoinOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-                if (currentOperatorRef == null)
-                    return null;
-            } else if (hiveOperator.getType() == OperatorType.MAPJOIN) {
-                MapJoinOperator fop = (MapJoinOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null) {
-                        continueTraverse = true;
-                        break;
-                    } else
-                        continueTraverse = false;
-                }
-                if (currentOperatorRef == null)
-                    return null;
-            } else if (hiveOperator.getType() == OperatorType.SELECT) {
-                SelectOperator fop = (SelectOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.EXTRACT) {
-                ExtractOperator fop = (ExtractOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.GROUPBY) {
-                GroupByOperator fop = (GroupByOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.TABLESCAN) {
-                TableScanOperator fop = (TableScanOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.FILESINK) {
-                FileSinkOperator fop = (FileSinkOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.LIMIT) {
-                LimitOperator lop = (LimitOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(lop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.UDTF) {
-                UDTFOperator lop = (UDTFOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(lop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.UNION) {
-                UnionOperator lop = (UnionOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(lop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null) {
-                        continueTraverse = true;
-                        break;
-                    } else
-                        continueTraverse = false;
-                }
-            } else
-                ;
-            if (hiveOperator.getChildOperators() != null && hiveOperator.getChildOperators().size() > 0
-                    && continueTraverse) {
-                @SuppressWarnings("unchecked")
-                List<Operator> children = hiveOperator.getChildOperators();
-                if (currentOperatorRef == null)
-                    currentOperatorRef = AlgebricksParentOperator;
-                translate(children, currentOperatorRef);
-            }
-            if (hiveOperator.getChildOperators() == null || hiveOperator.getChildOperators().size() == 0)
-                logicalOp.add(currentOperatorRef);
-        }
-        return logicalOp;
-    }
-
-    /**
-     * used in select, group by to get no-column-expression columns
-     * 
-     * @param cols
-     * @return
-     */
-    public ILogicalOperator getAssignOperator(Mutable<ILogicalOperator> parent, List<ExprNodeDesc> cols,
-            ArrayList<LogicalVariable> variables) {
-
-        ArrayList<Mutable<ILogicalExpression>> expressions = new ArrayList<Mutable<ILogicalExpression>>();
-
-        /**
-         * variables to be appended in the assign operator
-         */
-        ArrayList<LogicalVariable> appendedVariables = new ArrayList<LogicalVariable>();
-
-        // one variable can only be assigned once
-        for (ExprNodeDesc hiveExpr : cols) {
-            rewriteExpression(hiveExpr);
-
-            if (hiveExpr instanceof ExprNodeColumnDesc) {
-                ExprNodeColumnDesc desc2 = (ExprNodeColumnDesc) hiveExpr;
-                String fieldName = desc2.getTabAlias() + "." + desc2.getColumn();
-
-                // System.out.println("project expr: " + fieldName);
-
-                if (fieldName.indexOf("$$") < 0) {
-                    LogicalVariable var = getVariable(fieldName, hiveExpr.getTypeInfo());
-                    desc2.setColumn(var.toString());
-                    desc2.setTabAlias("");
-                    variables.add(var);
-                } else {
-                    LogicalVariable var = nameToLogicalVariableMap.get(desc2.getColumn());
-                    String name = this.logicalVariableToFieldMap.get(var);
-                    var = this.getVariableOnly(name);
-                    variables.add(var);
-                }
-            } else {
-                Mutable<ILogicalExpression> asterixExpr = translateScalarFucntion(hiveExpr);
-                expressions.add(asterixExpr);
-                LogicalVariable var = getVariable(hiveExpr.getExprString() + asterixExpr.hashCode(),
-                        hiveExpr.getTypeInfo());
-                variables.add(var);
-                appendedVariables.add(var);
-            }
-        }
-
-        /**
-         * create an assign operator to deal with appending
-         */
-        ILogicalOperator assignOp = null;
-        if (appendedVariables.size() > 0) {
-            assignOp = new AssignOperator(appendedVariables, expressions);
-            assignOp.getInputs().add(parent);
-        }
-        return assignOp;
-    }
-
-    private ILogicalPlan plan;
-
-    public ILogicalPlan genLogicalPlan() {
-        plan = new ALogicalPlanImpl(rootOperators);
-        return plan;
-    }
-
-    public void printOperators() throws AlgebricksException {
-        LogicalOperatorPrettyPrintVisitor pvisitor = new LogicalOperatorPrettyPrintVisitor();
-        StringBuilder buffer = new StringBuilder();
-        PlanPrettyPrinter.printPlan(plan, buffer, pvisitor, 0);
-        outputWriter.println(buffer);
-        outputWriter.println("rewritten variables: ");
-        outputWriter.flush();
-        printVariables();
-
-    }
-
-    public static void setOutputPrinter(PrintWriter writer) {
-        outputWriter = writer;
-    }
-
-    private void printVariables() {
-        Set<Entry<String, LogicalVariable>> entries = fieldToLogicalVariableMap.entrySet();
-
-        for (Entry<String, LogicalVariable> entry : entries) {
-            outputWriter.println(entry.getKey() + " -> " + entry.getValue());
-        }
-        outputWriter.flush();
-    }
-
-    /**
-     * generate the object inspector for the output of an operator
-     * 
-     * @param operator
-     *            The Hive operator
-     * @return an ObjectInspector object
-     */
-    public Schema generateInputSchema(Operator operator) {
-        List<String> variableNames = new ArrayList<String>();
-        List<TypeInfo> typeList = new ArrayList<TypeInfo>();
-        List<ColumnInfo> columns = operator.getSchema().getSignature();
-
-        for (ColumnInfo col : columns) {
-            // typeList.add();
-            TypeInfo type = col.getType();
-            typeList.add(type);
-
-            String fieldName = col.getInternalName();
-            variableNames.add(fieldName);
-        }
-
-        return new Schema(variableNames, typeList);
-    }
-
-    /**
-     * rewrite the names of output columns for feature expression evaluators to
-     * use
-     * 
-     * @param operator
-     */
-    public void rewriteOperatorOutputSchema(Operator operator) {
-        List<ColumnInfo> columns = operator.getSchema().getSignature();
-
-        for (ColumnInfo column : columns) {
-            String columnName = column.getTabAlias() + "." + column.getInternalName();
-            if (columnName.indexOf("$$") < 0) {
-                LogicalVariable var = getVariable(columnName, column.getType());
-                column.setInternalName(var.toString());
-            }
-        }
-    }
-
-    @Override
-    public void rewriteOperatorOutputSchema(List<LogicalVariable> variables, Operator operator) {
-
-        //printOperatorSchema(operator);
-        List<ColumnInfo> columns = operator.getSchema().getSignature();
-        if (variables.size() != columns.size()) {
-            throw new IllegalStateException("output cardinality error " + operator.getName() + " variable size: "
-                    + variables.size() + " expected " + columns.size());
-        }
-
-        for (int i = 0; i < variables.size(); i++) {
-            LogicalVariable var = variables.get(i);
-            ColumnInfo column = columns.get(i);
-            String fieldName = column.getTabAlias() + "." + column.getInternalName();
-            if (fieldName.indexOf("$$") < 0) {
-                updateVariable(fieldName, var);
-                column.setInternalName(var.toString());
-            }
-        }
-        //printOperatorSchema(operator);
-    }
-
-    /**
-     * rewrite an expression and substitute variables
-     * 
-     * @param expr
-     *            hive expression
-     */
-    public void rewriteExpression(ExprNodeDesc expr) {
-        if (expr instanceof ExprNodeColumnDesc) {
-            ExprNodeColumnDesc desc = (ExprNodeColumnDesc) expr;
-            String fieldName = desc.getTabAlias() + "." + desc.getColumn();
-            if (fieldName.indexOf("$$") < 0) {
-                LogicalVariable var = getVariableOnly(fieldName);
-                if (var == null) {
-                    fieldName = "." + desc.getColumn();
-                    var = getVariableOnly(fieldName);
-                    if (var == null) {
-                        fieldName = "null." + desc.getColumn();
-                        var = getVariableOnly(fieldName);
-                        if (var == null) {
-                            throw new IllegalStateException(fieldName + " is wrong!!! ");
-                        }
-                    }
-                }
-                String name = this.logicalVariableToFieldMap.get(var);
-                var = getVariableOnly(name);
-                desc.setColumn(var.toString());
-            }
-        } else {
-            if (expr.getChildren() != null && expr.getChildren().size() > 0) {
-                List<ExprNodeDesc> children = expr.getChildren();
-                for (ExprNodeDesc desc : children)
-                    rewriteExpression(desc);
-            }
-        }
-    }
-
-    /**
-     * rewrite an expression and substitute variables
-     * 
-     * @param expr
-     *            hive expression
-     */
-    public void rewriteExpressionPartial(ExprNodeDesc expr) {
-        if (expr instanceof ExprNodeColumnDesc) {
-            ExprNodeColumnDesc desc = (ExprNodeColumnDesc) expr;
-            String fieldName = desc.getTabAlias() + "." + desc.getColumn();
-            if (fieldName.indexOf("$$") < 0) {
-                LogicalVariable var = getVariableOnly(fieldName);
-                desc.setColumn(var.toString());
-            }
-        } else {
-            if (expr.getChildren() != null && expr.getChildren().size() > 0) {
-                List<ExprNodeDesc> children = expr.getChildren();
-                for (ExprNodeDesc desc : children)
-                    rewriteExpressionPartial(desc);
-            }
-        }
-    }
-
-    // private void printOperatorSchema(Operator operator) {
-    // // System.out.println(operator.getName());
-    // // List<ColumnInfo> columns = operator.getSchema().getSignature();
-    // // for (ColumnInfo column : columns) {
-    // // System.out.print(column.getTabAlias() + "." +
-    // // column.getInternalName() + "  ");
-    // // }
-    // // System.out.println();
-    // }
-
-    /**
-     * translate scalar function expression
-     * 
-     * @param hiveExpr
-     * @return
-     */
-    public Mutable<ILogicalExpression> translateScalarFucntion(ExprNodeDesc hiveExpr) {
-        ILogicalExpression AlgebricksExpr;
-
-        if (hiveExpr instanceof ExprNodeGenericFuncDesc) {
-            List<Mutable<ILogicalExpression>> arguments = new ArrayList<Mutable<ILogicalExpression>>();
-            List<ExprNodeDesc> children = hiveExpr.getChildren();
-
-            for (ExprNodeDesc child : children)
-                arguments.add(translateScalarFucntion(child));
-
-            ExprNodeGenericFuncDesc funcExpr = (ExprNodeGenericFuncDesc) hiveExpr;
-            GenericUDF genericUdf = funcExpr.getGenericUDF();
-            UDF udf = null;
-            if (genericUdf instanceof GenericUDFBridge) {
-                GenericUDFBridge bridge = (GenericUDFBridge) genericUdf;
-                try {
-                    udf = bridge.getUdfClass().newInstance();
-                } catch (Exception e) {
-                    e.printStackTrace();
-                }
-            }
-
-            /**
-             * set up the hive function
-             */
-            Object hiveFunction = genericUdf;
-            if (udf != null)
-                hiveFunction = udf;
-
-            FunctionIdentifier funcId = HiveAlgebricksBuiltInFunctionMap.INSTANCE.getAlgebricksFunctionId(hiveFunction
-                    .getClass());
-            if (funcId == null) {
-                funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, hiveFunction.getClass().getName());
-            }
-
-            Object functionInfo = null;
-            if (genericUdf instanceof GenericUDFBridge) {
-                functionInfo = funcExpr;
-            }
-
-            /**
-             * generate the function call expression
-             */
-            ScalarFunctionCallExpression AlgebricksFuncExpr = new ScalarFunctionCallExpression(new HiveFunctionInfo(
-                    funcId, functionInfo), arguments);
-            AlgebricksExpr = AlgebricksFuncExpr;
-
-        } else if (hiveExpr instanceof ExprNodeColumnDesc) {
-            ExprNodeColumnDesc column = (ExprNodeColumnDesc) hiveExpr;
-            LogicalVariable var = this.getVariable(column.getColumn());
-            AlgebricksExpr = new VariableReferenceExpression(var);
-
-        } else if (hiveExpr instanceof ExprNodeFieldDesc) {
-            FunctionIdentifier funcId;
-            funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, ExpressionConstant.FIELDACCESS);
-
-            ScalarFunctionCallExpression AlgebricksFuncExpr = new ScalarFunctionCallExpression(new HiveFunctionInfo(
-                    funcId, hiveExpr));
-            AlgebricksExpr = AlgebricksFuncExpr;
-        } else if (hiveExpr instanceof ExprNodeConstantDesc) {
-            ExprNodeConstantDesc hiveConst = (ExprNodeConstantDesc) hiveExpr;
-            Object value = hiveConst.getValue();
-            AlgebricksExpr = new ConstantExpression(new HivesterixConstantValue(value));
-        } else if (hiveExpr instanceof ExprNodeNullDesc) {
-            FunctionIdentifier funcId;
-            funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, ExpressionConstant.NULL);
-
-            ScalarFunctionCallExpression AlgebricksFuncExpr = new ScalarFunctionCallExpression(new HiveFunctionInfo(
-                    funcId, hiveExpr));
-
-            AlgebricksExpr = AlgebricksFuncExpr;
-        } else {
-            throw new IllegalStateException("unknown hive expression");
-        }
-        return new MutableObject<ILogicalExpression>(AlgebricksExpr);
-    }
-
-    /**
-     * translate aggregation function expression
-     * 
-     * @param aggregateDesc
-     * @return
-     */
-    public Mutable<ILogicalExpression> translateAggregation(AggregationDesc aggregateDesc) {
-
-        String UDAFName = aggregateDesc.getGenericUDAFName();
-
-        List<Mutable<ILogicalExpression>> arguments = new ArrayList<Mutable<ILogicalExpression>>();
-        List<ExprNodeDesc> children = aggregateDesc.getParameters();
-
-        for (ExprNodeDesc child : children)
-            arguments.add(translateScalarFucntion(child));
-
-        FunctionIdentifier funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, UDAFName + "("
-                + aggregateDesc.getMode() + ")");
-        HiveFunctionInfo funcInfo = new HiveFunctionInfo(funcId, aggregateDesc);
-        AggregateFunctionCallExpression aggregationExpression = new AggregateFunctionCallExpression(funcInfo, false,
-                arguments);
-        return new MutableObject<ILogicalExpression>(aggregationExpression);
-    }
-
-    /**
-     * translate aggregation function expression
-     * 
-     * @param aggregator
-     * @return
-     */
-    public Mutable<ILogicalExpression> translateUnnestFunction(UDTFDesc udtfDesc, Mutable<ILogicalExpression> argument) {
-
-        String UDTFName = udtfDesc.getUDTFName();
-
-        FunctionIdentifier funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, UDTFName);
-        UnnestingFunctionCallExpression unnestingExpression = new UnnestingFunctionCallExpression(new HiveFunctionInfo(
-                funcId, udtfDesc));
-        unnestingExpression.getArguments().add(argument);
-        return new MutableObject<ILogicalExpression>(unnestingExpression);
-    }
-
-    /**
-     * get typeinfo
-     */
-    @Override
-    public TypeInfo getType(LogicalVariable var) {
-        return variableToType.get(var);
-    }
-
-    /**
-     * get variable from variable name
-     */
-    @Override
-    public LogicalVariable getVariable(String name) {
-        return nameToLogicalVariableMap.get(name);
-    }
-
-    @Override
-    public LogicalVariable getVariableFromFieldName(String fieldName) {
-        return this.getVariableOnly(fieldName);
-    }
-
-    /**
-     * set the metadata provider
-     */
-    @Override
-    public void setMetadataProvider(IMetadataProvider<PartitionDesc, Object> metadata) {
-        this.metaData = metadata;
-    }
-
-    /**
-     * insert ReplicateOperator when necessary
-     */
-    private void insertReplicateOperator(List<Mutable<ILogicalOperator>> roots) {
-        Map<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>> childToParentsMap = new HashMap<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>>();
-        buildChildToParentsMapping(roots, childToParentsMap);
-        for (Entry<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>> entry : childToParentsMap.entrySet()) {
-            List<Mutable<ILogicalOperator>> pList = entry.getValue();
-            if (pList.size() > 1) {
-                ILogicalOperator rop = new ReplicateOperator(pList.size());
-                Mutable<ILogicalOperator> ropRef = new MutableObject<ILogicalOperator>(rop);
-                Mutable<ILogicalOperator> childRef = entry.getKey();
-                rop.getInputs().add(childRef);
-                for (Mutable<ILogicalOperator> parentRef : pList) {
-                    ILogicalOperator parentOp = parentRef.getValue();
-                    int index = parentOp.getInputs().indexOf(childRef);
-                    parentOp.getInputs().set(index, ropRef);
-                }
-            }
-        }
-    }
-
-    /**
-     * build the mapping from child to Parents
-     * 
-     * @param roots
-     * @param childToParentsMap
-     */
-    private void buildChildToParentsMapping(List<Mutable<ILogicalOperator>> roots,
-            Map<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>> map) {
-        for (Mutable<ILogicalOperator> opRef : roots) {
-            List<Mutable<ILogicalOperator>> childRefs = opRef.getValue().getInputs();
-            for (Mutable<ILogicalOperator> childRef : childRefs) {
-                List<Mutable<ILogicalOperator>> parentList = map.get(childRef);
-                if (parentList == null) {
-                    parentList = new ArrayList<Mutable<ILogicalOperator>>();
-                    map.put(childRef, parentList);
-                }
-                if (!parentList.contains(opRef))
-                    parentList.add(opRef);
-            }
-            buildChildToParentsMapping(childRefs, map);
-        }
-    }
-}
+package edu.uci.ics.hivesterix.logical.plan;
+
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.commons.lang3.mutable.MutableObject;
+import org.apache.hadoop.hive.ql.exec.ColumnInfo;
+import org.apache.hadoop.hive.ql.exec.ExtractOperator;
+import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
+import org.apache.hadoop.hive.ql.exec.FilterOperator;
+import org.apache.hadoop.hive.ql.exec.GroupByOperator;
+import org.apache.hadoop.hive.ql.exec.JoinOperator;
+import org.apache.hadoop.hive.ql.exec.LateralViewJoinOperator;
+import org.apache.hadoop.hive.ql.exec.LimitOperator;
+import org.apache.hadoop.hive.ql.exec.MapJoinOperator;
+import org.apache.hadoop.hive.ql.exec.Operator;
+import org.apache.hadoop.hive.ql.exec.ReduceSinkOperator;
+import org.apache.hadoop.hive.ql.exec.SelectOperator;
+import org.apache.hadoop.hive.ql.exec.TableScanOperator;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.hive.ql.exec.UDTFOperator;
+import org.apache.hadoop.hive.ql.exec.UnionOperator;
+import org.apache.hadoop.hive.ql.plan.AggregationDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeColumnDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeFieldDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeNullDesc;
+import org.apache.hadoop.hive.ql.plan.PartitionDesc;
+import org.apache.hadoop.hive.ql.plan.UDTFDesc;
+import org.apache.hadoop.hive.ql.plan.api.OperatorType;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDFBridge;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
+
+import edu.uci.ics.hivesterix.logical.expression.ExpressionConstant;
+import edu.uci.ics.hivesterix.logical.expression.HiveAlgebricksBuiltInFunctionMap;
+import edu.uci.ics.hivesterix.logical.expression.HiveFunctionInfo;
+import edu.uci.ics.hivesterix.logical.expression.HivesterixConstantValue;
+import edu.uci.ics.hivesterix.logical.plan.visitor.ExtractVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.FilterVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.GroupByVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.JoinVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.LateralViewJoinVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.LimitVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.MapJoinVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.ProjectVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.SortVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.TableScanWriteVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.UnionVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.Visitor;
+import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+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.ILogicalPlan;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AggregateFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ConstantExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ScalarFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.UnnestingFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AssignOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ReplicateOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.plan.ALogicalPlanImpl;
+import edu.uci.ics.hyracks.algebricks.core.algebra.prettyprint.LogicalOperatorPrettyPrintVisitor;
+import edu.uci.ics.hyracks.algebricks.core.algebra.prettyprint.PlanPrettyPrinter;
+
+@SuppressWarnings("rawtypes")
+public class HiveAlgebricksTranslator implements Translator {
+
+    private int currentVariable = 0;
+
+    private List<Mutable<ILogicalOperator>> logicalOp = new ArrayList<Mutable<ILogicalOperator>>();
+
+    private boolean continueTraverse = true;
+
+    private IMetadataProvider<PartitionDesc, Object> metaData;
+
+    /**
+     * map variable name to the logical variable
+     */
+    private HashMap<String, LogicalVariable> nameToLogicalVariableMap = new HashMap<String, LogicalVariable>();
+
+    /**
+     * map field name to LogicalVariable
+     */
+    private HashMap<String, LogicalVariable> fieldToLogicalVariableMap = new HashMap<String, LogicalVariable>();
+
+    /**
+     * map logical variable to name
+     */
+    private HashMap<LogicalVariable, String> logicalVariableToFieldMap = new HashMap<LogicalVariable, String>();
+
+    /**
+     * asterix root operators
+     */
+    private List<Mutable<ILogicalOperator>> rootOperators = new ArrayList<Mutable<ILogicalOperator>>();
+
+    /**
+     * a list of visitors
+     */
+    private List<Visitor> visitors = new ArrayList<Visitor>();
+
+    /**
+     * output writer to print things out
+     */
+    private static PrintWriter outputWriter = new PrintWriter(new OutputStreamWriter(System.out));
+
+    /**
+     * map a logical variable to type info
+     */
+    private HashMap<LogicalVariable, TypeInfo> variableToType = new HashMap<LogicalVariable, TypeInfo>();
+
+    @Override
+    public LogicalVariable getVariable(String fieldName, TypeInfo type) {
+        LogicalVariable var = fieldToLogicalVariableMap.get(fieldName);
+        if (var == null) {
+            currentVariable++;
+            var = new LogicalVariable(currentVariable);
+            fieldToLogicalVariableMap.put(fieldName, var);
+            nameToLogicalVariableMap.put(var.toString(), var);
+            variableToType.put(var, type);
+            logicalVariableToFieldMap.put(var, fieldName);
+        }
+        return var;
+    }
+
+    @Override
+    public LogicalVariable getNewVariable(String fieldName, TypeInfo type) {
+        currentVariable++;
+        LogicalVariable var = new LogicalVariable(currentVariable);
+        fieldToLogicalVariableMap.put(fieldName, var);
+        nameToLogicalVariableMap.put(var.toString(), var);
+        variableToType.put(var, type);
+        logicalVariableToFieldMap.put(var, fieldName);
+        return var;
+    }
+
+    @Override
+    public void replaceVariable(LogicalVariable oldVar, LogicalVariable newVar) {
+        String name = this.logicalVariableToFieldMap.get(oldVar);
+        if (name != null) {
+            fieldToLogicalVariableMap.put(name, newVar);
+            nameToLogicalVariableMap.put(newVar.toString(), newVar);
+            nameToLogicalVariableMap.put(oldVar.toString(), newVar);
+            logicalVariableToFieldMap.put(newVar, name);
+        }
+    }
+
+    @Override
+    public IMetadataProvider<PartitionDesc, Object> getMetadataProvider() {
+        return metaData;
+    }
+
+    /**
+     * only get an variable, without rewriting it
+     * 
+     * @param fieldName
+     * @return
+     */
+    private LogicalVariable getVariableOnly(String fieldName) {
+        return fieldToLogicalVariableMap.get(fieldName);
+    }
+
+    public void updateVariable(String fieldName, LogicalVariable variable) {
+        LogicalVariable var = fieldToLogicalVariableMap.get(fieldName);
+        if (var == null) {
+            fieldToLogicalVariableMap.put(fieldName, variable);
+            nameToLogicalVariableMap.put(fieldName, variable);
+        } else if (!var.equals(variable)) {
+            fieldToLogicalVariableMap.put(fieldName, variable);
+            nameToLogicalVariableMap.put(fieldName, variable);
+        }
+    }
+
+    /**
+     * get a list of logical variables from the schema
+     * 
+     * @param schema
+     * @return
+     */
+    @Override
+    public List<LogicalVariable> getVariablesFromSchema(Schema schema) {
+        List<LogicalVariable> variables = new ArrayList<LogicalVariable>();
+        List<String> names = schema.getNames();
+
+        for (String name : names)
+            variables.add(nameToLogicalVariableMap.get(name));
+        return variables;
+    }
+
+    /**
+     * get variable to typeinfo map
+     * 
+     * @return
+     */
+    public HashMap<LogicalVariable, TypeInfo> getVariableContext() {
+        return this.variableToType;
+    }
+
+    /**
+     * get the number of variables s
+     * 
+     * @return
+     */
+    public int getVariableCounter() {
+        return currentVariable + 1;
+    }
+
+    /**
+     * translate from hive operator tree to asterix operator tree
+     * 
+     * @param hive
+     *            roots
+     * @return Algebricks roots
+     */
+    public void translate(List<Operator> hiveRoot, ILogicalOperator parentOperator,
+            HashMap<String, PartitionDesc> aliasToPathMap) throws AlgebricksException {
+        /**
+         * register visitors
+         */
+        visitors.add(new FilterVisitor());
+        visitors.add(new GroupByVisitor());
+        visitors.add(new JoinVisitor());
+        visitors.add(new LateralViewJoinVisitor());
+        visitors.add(new UnionVisitor());
+        visitors.add(new LimitVisitor());
+        visitors.add(new MapJoinVisitor());
+        visitors.add(new ProjectVisitor());
+        visitors.add(new SortVisitor());
+        visitors.add(new ExtractVisitor());
+        visitors.add(new TableScanWriteVisitor(aliasToPathMap));
+
+        List<Mutable<ILogicalOperator>> refList = translate(hiveRoot, new MutableObject<ILogicalOperator>(
+                parentOperator));
+        insertReplicateOperator(refList);
+        if (refList != null)
+            rootOperators.addAll(refList);
+    }
+
+    /**
+     * translate operator DAG
+     * 
+     * @param hiveRoot
+     * @param AlgebricksParentOperator
+     * @return
+     */
+    private List<Mutable<ILogicalOperator>> translate(List<Operator> hiveRoot,
+            Mutable<ILogicalOperator> AlgebricksParentOperator) throws AlgebricksException {
+
+        for (Operator hiveOperator : hiveRoot) {
+            continueTraverse = true;
+            Mutable<ILogicalOperator> currentOperatorRef = null;
+            if (hiveOperator.getType() == OperatorType.FILTER) {
+                FilterOperator fop = (FilterOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.REDUCESINK) {
+                ReduceSinkOperator fop = (ReduceSinkOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.JOIN) {
+                JoinOperator fop = (JoinOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null) {
+                        continueTraverse = true;
+                        break;
+                    } else
+                        continueTraverse = false;
+                }
+                if (currentOperatorRef == null)
+                    return null;
+            } else if (hiveOperator.getType() == OperatorType.LATERALVIEWJOIN) {
+                LateralViewJoinOperator fop = (LateralViewJoinOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+                if (currentOperatorRef == null)
+                    return null;
+            } else if (hiveOperator.getType() == OperatorType.MAPJOIN) {
+                MapJoinOperator fop = (MapJoinOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null) {
+                        continueTraverse = true;
+                        break;
+                    } else
+                        continueTraverse = false;
+                }
+                if (currentOperatorRef == null)
+                    return null;
+            } else if (hiveOperator.getType() == OperatorType.SELECT) {
+                SelectOperator fop = (SelectOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.EXTRACT) {
+                ExtractOperator fop = (ExtractOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.GROUPBY) {
+                GroupByOperator fop = (GroupByOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.TABLESCAN) {
+                TableScanOperator fop = (TableScanOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.FILESINK) {
+                FileSinkOperator fop = (FileSinkOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.LIMIT) {
+                LimitOperator lop = (LimitOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(lop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.UDTF) {
+                UDTFOperator lop = (UDTFOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(lop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.UNION) {
+                UnionOperator lop = (UnionOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(lop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null) {
+                        continueTraverse = true;
+                        break;
+                    } else
+                        continueTraverse = false;
+                }
+            } else
+                ;
+            if (hiveOperator.getChildOperators() != null && hiveOperator.getChildOperators().size() > 0
+                    && continueTraverse) {
+                @SuppressWarnings("unchecked")
+                List<Operator> children = hiveOperator.getChildOperators();
+                if (currentOperatorRef == null)
+                    currentOperatorRef = AlgebricksParentOperator;
+                translate(children, currentOperatorRef);
+            }
+            if (hiveOperator.getChildOperators() == null || hiveOperator.getChildOperators().size() == 0)
+                logicalOp.add(currentOperatorRef);
+        }
+        return logicalOp;
+    }
+
+    /**
+     * used in select, group by to get no-column-expression columns
+     * 
+     * @param cols
+     * @return
+     */
+    public ILogicalOperator getAssignOperator(Mutable<ILogicalOperator> parent, List<ExprNodeDesc> cols,
+            ArrayList<LogicalVariable> variables) {
+
+        ArrayList<Mutable<ILogicalExpression>> expressions = new ArrayList<Mutable<ILogicalExpression>>();
+
+        /**
+         * variables to be appended in the assign operator
+         */
+        ArrayList<LogicalVariable> appendedVariables = new ArrayList<LogicalVariable>();
+
+        // one variable can only be assigned once
+        for (ExprNodeDesc hiveExpr : cols) {
+            rewriteExpression(hiveExpr);
+
+            if (hiveExpr instanceof ExprNodeColumnDesc) {
+                ExprNodeColumnDesc desc2 = (ExprNodeColumnDesc) hiveExpr;
+                String fieldName = desc2.getTabAlias() + "." + desc2.getColumn();
+
+                // System.out.println("project expr: " + fieldName);
+
+                if (fieldName.indexOf("$$") < 0) {
+                    LogicalVariable var = getVariable(fieldName, hiveExpr.getTypeInfo());
+                    desc2.setColumn(var.toString());
+                    desc2.setTabAlias("");
+                    variables.add(var);
+                } else {
+                    LogicalVariable var = nameToLogicalVariableMap.get(desc2.getColumn());
+                    String name = this.logicalVariableToFieldMap.get(var);
+                    var = this.getVariableOnly(name);
+                    variables.add(var);
+                }
+            } else {
+                Mutable<ILogicalExpression> asterixExpr = translateScalarFucntion(hiveExpr);
+                expressions.add(asterixExpr);
+                LogicalVariable var = getVariable(hiveExpr.getExprString() + asterixExpr.hashCode(),
+                        hiveExpr.getTypeInfo());
+                variables.add(var);
+                appendedVariables.add(var);
+            }
+        }
+
+        /**
+         * create an assign operator to deal with appending
+         */
+        ILogicalOperator assignOp = null;
+        if (appendedVariables.size() > 0) {
+            assignOp = new AssignOperator(appendedVariables, expressions);
+            assignOp.getInputs().add(parent);
+        }
+        return assignOp;
+    }
+
+    private ILogicalPlan plan;
+
+    public ILogicalPlan genLogicalPlan() {
+        plan = new ALogicalPlanImpl(rootOperators);
+        return plan;
+    }
+
+    public void printOperators() throws AlgebricksException {
+        LogicalOperatorPrettyPrintVisitor pvisitor = new LogicalOperatorPrettyPrintVisitor();
+        StringBuilder buffer = new StringBuilder();
+        PlanPrettyPrinter.printPlan(plan, buffer, pvisitor, 0);
+        outputWriter.println(buffer);
+        outputWriter.println("rewritten variables: ");
+        outputWriter.flush();
+        printVariables();
+
+    }
+
+    public static void setOutputPrinter(PrintWriter writer) {
+        outputWriter = writer;
+    }
+
+    private void printVariables() {
+        Set<Entry<String, LogicalVariable>> entries = fieldToLogicalVariableMap.entrySet();
+
+        for (Entry<String, LogicalVariable> entry : entries) {
+            outputWriter.println(entry.getKey() + " -> " + entry.getValue());
+        }
+        outputWriter.flush();
+    }
+
+    /**
+     * generate the object inspector for the output of an operator
+     * 
+     * @param operator
+     *            The Hive operator
+     * @return an ObjectInspector object
+     */
+    public Schema generateInputSchema(Operator operator) {
+        List<String> variableNames = new ArrayList<String>();
+        List<TypeInfo> typeList = new ArrayList<TypeInfo>();
+        List<ColumnInfo> columns = operator.getSchema().getSignature();
+
+        for (ColumnInfo col : columns) {
+            // typeList.add();
+            TypeInfo type = col.getType();
+            typeList.add(type);
+
+            String fieldName = col.getInternalName();
+            variableNames.add(fieldName);
+        }
+
+        return new Schema(variableNames, typeList);
+    }
+
+    /**
+     * rewrite the names of output columns for feature expression evaluators to
+     * use
+     * 
+     * @param operator
+     */
+    public void rewriteOperatorOutputSchema(Operator operator) {
+        List<ColumnInfo> columns = operator.getSchema().getSignature();
+        for (ColumnInfo column : columns) {
+            String columnName = column.getTabAlias() + "." + column.getInternalName();
+            if (columnName.indexOf("$$") < 0) {
+                LogicalVariable var = getVariable(columnName, column.getType());
+                column.setInternalName(var.toString());
+            }
+        }
+    }
+
+    @Override
+    public void rewriteOperatorOutputSchema(List<LogicalVariable> variables, Operator operator) {
+        // printOperatorSchema(operator);
+        List<ColumnInfo> columns = operator.getSchema().getSignature();
+        // if (variables.size() != columns.size()) {
+        // throw new IllegalStateException("output cardinality error " +
+        // operator.getName() + " variable size: "
+        // + variables.size() + " expected " + columns.size());
+        // }
+        for (int i = 0; i < variables.size(); i++) {
+            LogicalVariable var = variables.get(i);
+            ColumnInfo column = columns.get(i);
+            String fieldName = column.getTabAlias() + "." + column.getInternalName();
+            if (fieldName.indexOf("$$") < 0) {
+                updateVariable(fieldName, var);
+                column.setInternalName(var.toString());
+            }
+        }
+
+        // printOperatorSchema(operator);
+    }
+
+    /**
+     * rewrite an expression and substitute variables
+     * 
+     * @param expr
+     *            hive expression
+     */
+    public void rewriteExpression(ExprNodeDesc expr) {
+        if (expr instanceof ExprNodeColumnDesc) {
+            ExprNodeColumnDesc desc = (ExprNodeColumnDesc) expr;
+            String fieldName = desc.getTabAlias() + "." + desc.getColumn();
+            if (fieldName.indexOf("$$") < 0) {
+                LogicalVariable var = getVariableOnly(fieldName);
+                if (var == null) {
+                    fieldName = "." + desc.getColumn();
+                    var = getVariableOnly(fieldName);
+                    if (var == null) {
+                        fieldName = "null." + desc.getColumn();
+                        var = getVariableOnly(fieldName);
+                        if (var == null) {
+                            throw new IllegalStateException(fieldName + " is wrong!!! ");
+                        }
+                    }
+                }
+                String name = this.logicalVariableToFieldMap.get(var);
+                var = getVariableOnly(name);
+                desc.setColumn(var.toString());
+            }
+        } else {
+            if (expr.getChildren() != null && expr.getChildren().size() > 0) {
+                List<ExprNodeDesc> children = expr.getChildren();
+                for (ExprNodeDesc desc : children)
+                    rewriteExpression(desc);
+            }
+        }
+    }
+
+    /**
+     * rewrite an expression and substitute variables
+     * 
+     * @param expr
+     *            hive expression
+     */
+    public void rewriteExpressionPartial(ExprNodeDesc expr) {
+        if (expr instanceof ExprNodeColumnDesc) {
+            ExprNodeColumnDesc desc = (ExprNodeColumnDesc) expr;
+            String fieldName = desc.getTabAlias() + "." + desc.getColumn();
+            if (fieldName.indexOf("$$") < 0) {
+                LogicalVariable var = getVariableOnly(fieldName);
+                desc.setColumn(var.toString());
+            }
+        } else {
+            if (expr.getChildren() != null && expr.getChildren().size() > 0) {
+                List<ExprNodeDesc> children = expr.getChildren();
+                for (ExprNodeDesc desc : children)
+                    rewriteExpressionPartial(desc);
+            }
+        }
+    }
+
+    // private void printOperatorSchema(Operator operator) {
+    // // System.out.println(operator.getName());
+    // // List<ColumnInfo> columns = operator.getSchema().getSignature();
+    // // for (ColumnInfo column : columns) {
+    // // System.out.print(column.getTabAlias() + "." +
+    // // column.getInternalName() + "  ");
+    // // }
+    // // System.out.println();
+    // }
+
+    /**
+     * translate scalar function expression
+     * 
+     * @param hiveExpr
+     * @return
+     */
+    public Mutable<ILogicalExpression> translateScalarFucntion(ExprNodeDesc hiveExpr) {
+        ILogicalExpression AlgebricksExpr;
+
+        if (hiveExpr instanceof ExprNodeGenericFuncDesc) {
+            List<Mutable<ILogicalExpression>> arguments = new ArrayList<Mutable<ILogicalExpression>>();
+            List<ExprNodeDesc> children = hiveExpr.getChildren();
+
+            for (ExprNodeDesc child : children)
+                arguments.add(translateScalarFucntion(child));
+
+            ExprNodeGenericFuncDesc funcExpr = (ExprNodeGenericFuncDesc) hiveExpr;
+            GenericUDF genericUdf = funcExpr.getGenericUDF();
+            UDF udf = null;
+            if (genericUdf instanceof GenericUDFBridge) {
+                GenericUDFBridge bridge = (GenericUDFBridge) genericUdf;
+                try {
+                    udf = bridge.getUdfClass().newInstance();
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            }
+
+            /**
+             * set up the hive function
+             */
+            Object hiveFunction = genericUdf;
+            if (udf != null)
+                hiveFunction = udf;
+
+            FunctionIdentifier funcId = HiveAlgebricksBuiltInFunctionMap.INSTANCE.getAlgebricksFunctionId(hiveFunction
+                    .getClass());
+            if (funcId == null) {
+                funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, hiveFunction.getClass().getName());
+            }
+
+            Object functionInfo = null;
+            if (genericUdf instanceof GenericUDFBridge) {
+                functionInfo = funcExpr;
+            }
+
+            /**
+             * generate the function call expression
+             */
+            ScalarFunctionCallExpression AlgebricksFuncExpr = new ScalarFunctionCallExpression(new HiveFunctionInfo(
+                    funcId, functionInfo), arguments);
+            AlgebricksExpr = AlgebricksFuncExpr;
+
+        } else if (hiveExpr instanceof ExprNodeColumnDesc) {
+            ExprNodeColumnDesc column = (ExprNodeColumnDesc) hiveExpr;
+            LogicalVariable var = this.getVariable(column.getColumn());
+            AlgebricksExpr = new VariableReferenceExpression(var);
+
+        } else if (hiveExpr instanceof ExprNodeFieldDesc) {
+            FunctionIdentifier funcId;
+            funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, ExpressionConstant.FIELDACCESS);
+
+            ScalarFunctionCallExpression AlgebricksFuncExpr = new ScalarFunctionCallExpression(new HiveFunctionInfo(
+                    funcId, hiveExpr));
+            AlgebricksExpr = AlgebricksFuncExpr;
+        } else if (hiveExpr instanceof ExprNodeConstantDesc) {
+            ExprNodeConstantDesc hiveConst = (ExprNodeConstantDesc) hiveExpr;
+            Object value = hiveConst.getValue();
+            AlgebricksExpr = new ConstantExpression(new HivesterixConstantValue(value));
+        } else if (hiveExpr instanceof ExprNodeNullDesc) {
+            FunctionIdentifier funcId;
+            funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, ExpressionConstant.NULL);
+
+            ScalarFunctionCallExpression AlgebricksFuncExpr = new ScalarFunctionCallExpression(new HiveFunctionInfo(
+                    funcId, hiveExpr));
+
+            AlgebricksExpr = AlgebricksFuncExpr;
+        } else {
+            throw new IllegalStateException("unknown hive expression");
+        }
+        return new MutableObject<ILogicalExpression>(AlgebricksExpr);
+    }
+
+    /**
+     * translate aggregation function expression
+     * 
+     * @param aggregateDesc
+     * @return
+     */
+    public Mutable<ILogicalExpression> translateAggregation(AggregationDesc aggregateDesc) {
+
+        String UDAFName = aggregateDesc.getGenericUDAFName();
+
+        List<Mutable<ILogicalExpression>> arguments = new ArrayList<Mutable<ILogicalExpression>>();
+        List<ExprNodeDesc> children = aggregateDesc.getParameters();
+
+        for (ExprNodeDesc child : children)
+            arguments.add(translateScalarFucntion(child));
+
+        FunctionIdentifier funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, UDAFName + "("
+                + aggregateDesc.getMode() + ")");
+        HiveFunctionInfo funcInfo = new HiveFunctionInfo(funcId, aggregateDesc);
+        AggregateFunctionCallExpression aggregationExpression = new AggregateFunctionCallExpression(funcInfo, false,
+                arguments);
+        return new MutableObject<ILogicalExpression>(aggregationExpression);
+    }
+
+    /**
+     * translate aggregation function expression
+     * 
+     * @param aggregator
+     * @return
+     */
+    public Mutable<ILogicalExpression> translateUnnestFunction(UDTFDesc udtfDesc, Mutable<ILogicalExpression> argument) {
+
+        String UDTFName = udtfDesc.getUDTFName();
+
+        FunctionIdentifier funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, UDTFName);
+        UnnestingFunctionCallExpression unnestingExpression = new UnnestingFunctionCallExpression(new HiveFunctionInfo(
+                funcId, udtfDesc));
+        unnestingExpression.getArguments().add(argument);
+        return new MutableObject<ILogicalExpression>(unnestingExpression);
+    }
+
+    /**
+     * get typeinfo
+     */
+    @Override
+    public TypeInfo getType(LogicalVariable var) {
+        return variableToType.get(var);
+    }
+
+    /**
+     * get variable from variable name
+     */
+    @Override
+    public LogicalVariable getVariable(String name) {
+        return nameToLogicalVariableMap.get(name);
+    }
+
+    @Override
+    public LogicalVariable getVariableFromFieldName(String fieldName) {
+        return this.getVariableOnly(fieldName);
+    }
+
+    /**
+     * set the metadata provider
+     */
+    @Override
+    public void setMetadataProvider(IMetadataProvider<PartitionDesc, Object> metadata) {
+        this.metaData = metadata;
+    }
+
+    /**
+     * insert ReplicateOperator when necessary
+     */
+    private void insertReplicateOperator(List<Mutable<ILogicalOperator>> roots) {
+        Map<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>> childToParentsMap = new HashMap<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>>();
+        buildChildToParentsMapping(roots, childToParentsMap);
+        for (Entry<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>> entry : childToParentsMap.entrySet()) {
+            List<Mutable<ILogicalOperator>> pList = entry.getValue();
+            if (pList.size() > 1) {
+                ILogicalOperator rop = new ReplicateOperator(pList.size());
+                Mutable<ILogicalOperator> ropRef = new MutableObject<ILogicalOperator>(rop);
+                Mutable<ILogicalOperator> childRef = entry.getKey();
+                rop.getInputs().add(childRef);
+                for (Mutable<ILogicalOperator> parentRef : pList) {
+                    ILogicalOperator parentOp = parentRef.getValue();
+                    int index = parentOp.getInputs().indexOf(childRef);
+                    parentOp.getInputs().set(index, ropRef);
+                }
+            }
+        }
+    }
+
+    /**
+     * build the mapping from child to Parents
+     * 
+     * @param roots
+     * @param childToParentsMap
+     */
+    private void buildChildToParentsMapping(List<Mutable<ILogicalOperator>> roots,
+            Map<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>> map) {
+        for (Mutable<ILogicalOperator> opRef : roots) {
+            List<Mutable<ILogicalOperator>> childRefs = opRef.getValue().getInputs();
+            for (Mutable<ILogicalOperator> childRef : childRefs) {
+                List<Mutable<ILogicalOperator>> parentList = map.get(childRef);
+                if (parentList == null) {
+                    parentList = new ArrayList<Mutable<ILogicalOperator>>();
+                    map.put(childRef, parentList);
+                }
+                if (!parentList.contains(opRef))
+                    parentList.add(opRef);
+            }
+            buildChildToParentsMapping(childRefs, map);
+        }
+    }
+}
diff --git a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/LateralViewJoinVisitor.java b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/LateralViewJoinVisitor.java
index f4161a4..aa1837c 100644
--- a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/LateralViewJoinVisitor.java
+++ b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/LateralViewJoinVisitor.java
@@ -12,113 +12,145 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.logical.plan.visitor;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import org.apache.commons.lang3.mutable.Mutable;
-import org.apache.commons.lang3.mutable.MutableObject;
-import org.apache.hadoop.hive.ql.exec.LateralViewJoinOperator;
-import org.apache.hadoop.hive.ql.exec.Operator;
-import org.apache.hadoop.hive.ql.exec.UDTFOperator;
-import org.apache.hadoop.hive.ql.plan.UDTFDesc;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
-
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.DefaultVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
-import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
-import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
-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.LogicalVariable;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.visitors.VariableUtilities;
-
-/**
- * The lateral view join operator is used for FROM src LATERAL VIEW udtf()...
- * This operator was implemented with the following operator DAG in mind.
- * For a query such as
- * SELECT pageid, adid.* FROM example_table LATERAL VIEW explode(adid_list) AS
- * adid
- * The top of the operator DAG will look similar to
- * [Table Scan] | [Lateral View Forward] / \ [Select](*) [Select](adid_list) | |
- * | [UDTF] (explode) \ / [Lateral View Join] | | [Select] (pageid, adid.*) |
- * ....
- * Rows from the table scan operator are first to a lateral view forward
- * operator that just forwards the row and marks the start of a LV. The select
- * operator on the left picks all the columns while the select operator on the
- * right picks only the columns needed by the UDTF.
- * The output of select in the left branch and output of the UDTF in the right
- * branch are then sent to the lateral view join (LVJ). In most cases, the UDTF
- * will generate > 1 row for every row received from the TS, while the left
- * select operator will generate only one. For each row output from the TS, the
- * LVJ outputs all possible rows that can be created by joining the row from the
- * left select and one of the rows output from the UDTF.
- * Additional lateral views can be supported by adding a similar DAG after the
- * previous LVJ operator.
- */
-
-@SuppressWarnings("rawtypes")
-public class LateralViewJoinVisitor extends DefaultVisitor {
-
-    private UDTFDesc udtf;
-
-    private List<Mutable<ILogicalOperator>> parents = new ArrayList<Mutable<ILogicalOperator>>();
-
-    @Override
-    public Mutable<ILogicalOperator> visit(LateralViewJoinOperator operator,
-            Mutable<ILogicalOperator> AlgebricksParentOperatorRef, Translator t) throws AlgebricksException {
-
-        parents.add(AlgebricksParentOperatorRef);
-        if (operator.getParentOperators().size() > parents.size()) {
-            return null;
-        }
-
-        Operator parent0 = operator.getParentOperators().get(0);
-        ILogicalOperator parentOperator;
-        ILogicalExpression unnestArg;
-        if (parent0 instanceof UDTFOperator) {
-            List<LogicalVariable> unnestVars = new ArrayList<LogicalVariable>();
-            VariableUtilities.getLiveVariables(parents.get(1).getValue(), unnestVars);
-            unnestArg = new VariableReferenceExpression(unnestVars.get(0));
-            parentOperator = parents.get(1).getValue();
-        } else {
-            List<LogicalVariable> unnestVars = new ArrayList<LogicalVariable>();
-            VariableUtilities.getLiveVariables(parents.get(0).getValue(), unnestVars);
-            unnestArg = new VariableReferenceExpression(unnestVars.get(0));
-            parentOperator = parents.get(0).getValue();
-        }
-
-        LogicalVariable var = t.getVariable(udtf.toString(), TypeInfoFactory.unknownTypeInfo);
-
-        Mutable<ILogicalExpression> unnestExpr = t.translateUnnestFunction(udtf, new MutableObject<ILogicalExpression>(
-                unnestArg));
-        ILogicalOperator currentOperator = new UnnestOperator(var, unnestExpr);
-
-        List<LogicalVariable> outputVars = new ArrayList<LogicalVariable>();
-        VariableUtilities.getLiveVariables(parentOperator, outputVars);
-        outputVars.add(var);
-        currentOperator.getInputs().add(new MutableObject<ILogicalOperator>(parentOperator));
-
-        parents.clear();
-        udtf = null;
-        t.rewriteOperatorOutputSchema(outputVars, operator);
-        return new MutableObject<ILogicalOperator>(currentOperator);
-    }
-
-    @Override
-    public Mutable<ILogicalOperator> visit(UDTFOperator operator,
-            Mutable<ILogicalOperator> AlgebricksParentOperatorRef, Translator t) {
-        Schema currentSchema = t.generateInputSchema(operator.getParentOperators().get(0));
-        udtf = (UDTFDesc) operator.getConf();
-
-        // populate the schema from upstream operator
-        operator.setSchema(operator.getParentOperators().get(0).getSchema());
-        List<LogicalVariable> latestOutputSchema = t.getVariablesFromSchema(currentSchema);
-        t.rewriteOperatorOutputSchema(latestOutputSchema, operator);
-        return null;
-    }
-
-}
+package edu.uci.ics.hivesterix.logical.plan.visitor;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.commons.lang3.mutable.MutableObject;
+import org.apache.hadoop.hive.ql.exec.ColumnInfo;
+import org.apache.hadoop.hive.ql.exec.LateralViewJoinOperator;
+import org.apache.hadoop.hive.ql.exec.Operator;
+import org.apache.hadoop.hive.ql.exec.UDTFOperator;
+import org.apache.hadoop.hive.ql.plan.LateralViewJoinDesc;
+import org.apache.hadoop.hive.ql.plan.UDTFDesc;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
+
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.DefaultVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
+import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+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.LogicalVariable;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ProjectOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.visitors.VariableUtilities;
+
+/**
+ * The lateral view join operator is used for FROM src LATERAL VIEW udtf()...
+ * This operator was implemented with the following operator DAG in mind.
+ * For a query such as
+ * SELECT pageid, adid.* FROM example_table LATERAL VIEW explode(adid_list) AS
+ * adid
+ * The top of the operator DAG will look similar to
+ * [Table Scan] | [Lateral View Forward] / \ [Select](*) [Select](adid_list) | |
+ * | [UDTF] (explode) \ / [Lateral View Join] | | [Select] (pageid, adid.*) |
+ * ....
+ * Rows from the table scan operator are first to a lateral view forward
+ * operator that just forwards the row and marks the start of a LV. The select
+ * operator on the left picks all the columns while the select operator on the
+ * right picks only the columns needed by the UDTF.
+ * The output of select in the left branch and output of the UDTF in the right
+ * branch are then sent to the lateral view join (LVJ). In most cases, the UDTF
+ * will generate > 1 row for every row received from the TS, while the left
+ * select operator will generate only one. For each row output from the TS, the
+ * LVJ outputs all possible rows that can be created by joining the row from the
+ * left select and one of the rows output from the UDTF.
+ * Additional lateral views can be supported by adding a similar DAG after the
+ * previous LVJ operator.
+ */
+
+@SuppressWarnings("rawtypes")
+public class LateralViewJoinVisitor extends DefaultVisitor {
+
+    private UDTFDesc udtf;
+
+    private List<Mutable<ILogicalOperator>> parents = new ArrayList<Mutable<ILogicalOperator>>();
+
+    @Override
+    public Mutable<ILogicalOperator> visit(LateralViewJoinOperator operator,
+            Mutable<ILogicalOperator> AlgebricksParentOperatorRef, Translator t) throws AlgebricksException {
+
+        parents.add(AlgebricksParentOperatorRef);
+        if (operator.getParentOperators().size() > parents.size()) {
+            return null;
+        }
+
+        ILogicalOperator parentOperator = null;
+        ILogicalExpression unnestArg = null;
+        List<LogicalVariable> projectVariables = new ArrayList<LogicalVariable>();
+        for (Mutable<ILogicalOperator> parentLOpRef : parents) {
+            VariableUtilities.getLiveVariables(parentLOpRef.getValue(), projectVariables);
+        }
+        for (Operator parentOp : operator.getParentOperators()) {
+            if (parentOp instanceof UDTFOperator) {
+                int index = operator.getParentOperators().indexOf(parentOp);
+                List<LogicalVariable> unnestVars = new ArrayList<LogicalVariable>();
+                VariableUtilities.getLiveVariables(parents.get(index).getValue(), unnestVars);
+                unnestArg = new VariableReferenceExpression(unnestVars.get(0));
+                parentOperator = parents.get(index).getValue();
+            }
+        }
+
+        LogicalVariable var = t.getVariable(udtf.toString(), TypeInfoFactory.unknownTypeInfo);
+        Mutable<ILogicalExpression> unnestExpr = t.translateUnnestFunction(udtf, new MutableObject<ILogicalExpression>(
+                unnestArg));
+        ILogicalOperator currentOperator = new UnnestOperator(var, unnestExpr);
+
+        List<LogicalVariable> outputVars = new ArrayList<LogicalVariable>();
+        VariableUtilities.getLiveVariables(parents.get(0).getValue(), outputVars);
+        outputVars.add(var);
+        ILogicalOperator inputProjectOperator = new ProjectOperator(projectVariables);
+        currentOperator.getInputs().add(new MutableObject<ILogicalOperator>(inputProjectOperator));
+        inputProjectOperator.getInputs().addAll(parentOperator.getInputs());
+
+        parents.clear();
+        udtf = null;
+        List<ColumnInfo> inputSchema = operator.getSchema().getSignature();
+        rewriteOperatorDesc(outputVars, operator.getConf(), inputSchema, t);
+        //t.rewriteOperatorOutputSchema(outputVars, operator);
+        return new MutableObject<ILogicalOperator>(currentOperator);
+    }
+
+    @Override
+    public Mutable<ILogicalOperator> visit(UDTFOperator operator,
+            Mutable<ILogicalOperator> AlgebricksParentOperatorRef, Translator t) {
+        Schema currentSchema = t.generateInputSchema(operator.getParentOperators().get(0));
+        udtf = (UDTFDesc) operator.getConf();
+
+        // populate the schema from upstream operator
+        operator.setSchema(operator.getParentOperators().get(0).getSchema());
+        List<LogicalVariable> latestOutputSchema = t.getVariablesFromSchema(currentSchema);
+        t.rewriteOperatorOutputSchema(latestOutputSchema, operator);
+        return null;
+    }
+
+    private void rewriteOperatorDesc(List<LogicalVariable> variables, LateralViewJoinDesc desc,
+            List<ColumnInfo> schema, Translator t) {
+        List<String> outputFieldNames = desc.getOutputInternalColNames();
+        for (int i = 0; i < variables.size(); i++) {
+            LogicalVariable var = variables.get(i);
+            String fieldName = outputFieldNames.get(i);
+            String tabAlias = findTabAlias(fieldName, schema);
+            fieldName = tabAlias + "." + fieldName;
+            if (fieldName.indexOf("$$") < 0) {
+                //outputFieldNames.set(i, var.toString());
+                t.updateVariable(fieldName, var);
+            }
+        }
+    }
+
+    private String findTabAlias(String fieldName, List<ColumnInfo> schema) {
+        for (int i = 0; i < schema.size(); i++) {
+            ColumnInfo column = schema.get(i);
+            if (column.getInternalName().equals(fieldName)) {
+                return column.getTabAlias();
+            }
+        }
+        return "null";
+    }
+
+}
diff --git a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/MapJoinVisitor.java b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/MapJoinVisitor.java
index 186b291..3ed9786 100644
--- a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/MapJoinVisitor.java
+++ b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/MapJoinVisitor.java
@@ -14,36 +14,36 @@
  */
 package edu.uci.ics.hivesterix.logical.plan.visitor;
 
-import java.io.Serializable;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Set;
-
-import org.apache.commons.lang3.mutable.Mutable;
-import org.apache.commons.lang3.mutable.MutableObject;
-import org.apache.hadoop.hive.ql.exec.ColumnInfo;
-import org.apache.hadoop.hive.ql.exec.MapJoinOperator;
-import org.apache.hadoop.hive.ql.exec.Operator;
-import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
-import org.apache.hadoop.hive.ql.plan.MapJoinDesc;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPAnd;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPEqual;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
-
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.DefaultVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
-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.LogicalVariable;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.InnerJoinOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ProjectOperator;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.commons.lang3.mutable.MutableObject;
+import org.apache.hadoop.hive.ql.exec.ColumnInfo;
+import org.apache.hadoop.hive.ql.exec.MapJoinOperator;
+import org.apache.hadoop.hive.ql.exec.Operator;
+import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
+import org.apache.hadoop.hive.ql.plan.MapJoinDesc;
+import org.apache.hadoop.hive.ql.plan.OperatorDesc;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPAnd;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPEqual;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
+
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.DefaultVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
+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.LogicalVariable;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.InnerJoinOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ProjectOperator;
 
 @SuppressWarnings("rawtypes")
 public class MapJoinVisitor extends DefaultVisitor {
@@ -56,7 +56,7 @@
     @Override
     public Mutable<ILogicalOperator> visit(MapJoinOperator operator,
             Mutable<ILogicalOperator> AlgebricksParentOperatorRef, Translator t) {
-        List<Operator<? extends Serializable>> joinSrc = operator.getParentOperators();
+        List<Operator<? extends OperatorDesc>> joinSrc = operator.getParentOperators();
         List<Mutable<ILogicalOperator>> parents = opMap.get(operator);
         if (parents == null) {
             parents = new ArrayList<Mutable<ILogicalOperator>>();
diff --git a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/TableScanWriteVisitor.java b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/TableScanWriteVisitor.java
index 74cebaa..25abdec 100644
--- a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/TableScanWriteVisitor.java
+++ b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/TableScanWriteVisitor.java
@@ -69,9 +69,9 @@
 
     @Override
     public Mutable<ILogicalOperator> visit(TableScanOperator operator,
-            Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t) throws AlgebricksException {
+            Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t) throws AlgebricksException {    	
         TableScanDesc desc = (TableScanDesc) operator.getConf();
-        if (desc == null) {
+        if (desc == null || desc.getAlias()==null) {
             List<LogicalVariable> schema = new ArrayList<LogicalVariable>();
             VariableUtilities.getLiveVariables(AlgebricksParentOperator.getValue(), schema);
             t.rewriteOperatorOutputSchema(schema, operator);
@@ -124,7 +124,6 @@
     @Override
     public Mutable<ILogicalOperator> visit(FileSinkOperator hiveOperator,
             Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t) {
-
         if (hiveOperator.getChildOperators() != null && hiveOperator.getChildOperators().size() > 0)
             return null;
 
diff --git a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/UnionVisitor.java b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/UnionVisitor.java
index 1cb5121..c710f3f 100644
--- a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/UnionVisitor.java
+++ b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/UnionVisitor.java
@@ -14,21 +14,21 @@
  */
 package edu.uci.ics.hivesterix.logical.plan.visitor;
 
-import java.util.ArrayList;
-import java.util.List;
-
-import org.apache.commons.lang3.mutable.Mutable;
-import org.apache.commons.lang3.mutable.MutableObject;
-import org.apache.hadoop.hive.ql.exec.UnionOperator;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
-
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.DefaultVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
-import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
-import edu.uci.ics.hyracks.algebricks.common.utils.Triple;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.visitors.VariableUtilities;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.commons.lang3.mutable.MutableObject;
+import org.apache.hadoop.hive.ql.exec.UnionOperator;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
+
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.DefaultVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.common.utils.Triple;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.visitors.VariableUtilities;
 
 public class UnionVisitor extends DefaultVisitor {
 
@@ -46,8 +46,8 @@
         List<LogicalVariable> leftVars = new ArrayList<LogicalVariable>();
         List<LogicalVariable> rightVars = new ArrayList<LogicalVariable>();
 
-        VariableUtilities.getUsedVariables(parents.get(0).getValue(), leftVars);
-        VariableUtilities.getUsedVariables(parents.get(1).getValue(), rightVars);
+        VariableUtilities.getLiveVariables(parents.get(0).getValue(), leftVars);
+        VariableUtilities.getLiveVariables(parents.get(1).getValue(), rightVars);
 
         List<Triple<LogicalVariable, LogicalVariable, LogicalVariable>> triples = new ArrayList<Triple<LogicalVariable, LogicalVariable, LogicalVariable>>();
         List<LogicalVariable> unionVars = new ArrayList<LogicalVariable>();
diff --git a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/base/Translator.java b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/base/Translator.java
index 32b0f66..5b6ac50 100644
--- a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/base/Translator.java
+++ b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/base/Translator.java
@@ -12,173 +12,181 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.logical.plan.visitor.base;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import org.apache.commons.lang3.mutable.Mutable;
-import org.apache.hadoop.hive.ql.exec.Operator;
-import org.apache.hadoop.hive.ql.plan.AggregationDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
-import org.apache.hadoop.hive.ql.plan.PartitionDesc;
-import org.apache.hadoop.hive.ql.plan.UDTFDesc;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
-
-import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
-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.LogicalVariable;
-import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
-
-@SuppressWarnings("rawtypes")
-public interface Translator {
-
-    /**
-     * generate input schema
-     * 
-     * @param operator
-     * @return
-     */
-    public Schema generateInputSchema(Operator operator);
-
-    /**
-     * rewrite the names of output columns for feture expression evaluators to
-     * use
-     * 
-     * @param operator
-     */
-    public void rewriteOperatorOutputSchema(List<LogicalVariable> vars, Operator operator);
-
-    /**
-     * rewrite the names of output columns for feture expression evaluators to
-     * use
-     * 
-     * @param operator
-     */
-    public void rewriteOperatorOutputSchema(Operator operator);
-
-    /**
-     * rewrite an expression and substitute variables
-     * 
-     * @param expr
-     *            hive expression
-     */
-    public void rewriteExpression(ExprNodeDesc expr);
-
-    /**
-     * rewrite an expression and substitute variables
-     * 
-     * @param expr
-     *            hive expression
-     */
-    public void rewriteExpressionPartial(ExprNodeDesc expr);
-
-    /**
-     * get an assign operator as a child of parent
-     * 
-     * @param parent
-     * @param cols
-     * @param variables
-     * @return
-     */
-    public ILogicalOperator getAssignOperator(Mutable<ILogicalOperator> parent, List<ExprNodeDesc> cols,
-            ArrayList<LogicalVariable> variables);
-
-    /**
-     * get type for a logical variable
-     * 
-     * @param var
-     * @return type info
-     */
-    public TypeInfo getType(LogicalVariable var);
-
-    /**
-     * translate an expression from hive to Algebricks
-     * 
-     * @param desc
-     * @return
-     */
-    public Mutable<ILogicalExpression> translateScalarFucntion(ExprNodeDesc desc);
-
-    /**
-     * translate an aggregation from hive to Algebricks
-     * 
-     * @param aggregateDesc
-     * @return
-     */
-    public Mutable<ILogicalExpression> translateAggregation(AggregationDesc aggregateDesc);
-
-    /**
-     * translate unnesting (UDTF) function expression
-     * 
-     * @param aggregator
-     * @return
-     */
-    public Mutable<ILogicalExpression> translateUnnestFunction(UDTFDesc udtfDesc, Mutable<ILogicalExpression> argument);
-
-    /**
-     * get variable from a schema
-     * 
-     * @param schema
-     * @return
-     */
-    public List<LogicalVariable> getVariablesFromSchema(Schema schema);
-
-    /**
-     * get variable from name
-     * 
-     * @param name
-     * @return
-     */
-    public LogicalVariable getVariable(String name);
-
-    /**
-     * get variable from field name
-     * 
-     * @param name
-     * @return
-     */
-    public LogicalVariable getVariableFromFieldName(String name);
-
-    /**
-     * get variable from name, type
-     * 
-     * @param fieldName
-     * @param type
-     * @return
-     */
-    public LogicalVariable getVariable(String fieldName, TypeInfo type);
-
-    /**
-     * get new variable from name, type
-     * 
-     * @param fieldName
-     * @param type
-     * @return
-     */
-    public LogicalVariable getNewVariable(String fieldName, TypeInfo type);
-
-    /**
-     * set the metadata provider
-     * 
-     * @param metadata
-     */
-    public void setMetadataProvider(IMetadataProvider<PartitionDesc, Object> metadata);
-
-    /**
-     * get the metadata provider
-     * 
-     * @param metadata
-     */
-    public IMetadataProvider<PartitionDesc, Object> getMetadataProvider();
-
-    /**
-     * replace the variable
-     * 
-     * @param oldVar
-     * @param newVar
-     */
-    public void replaceVariable(LogicalVariable oldVar, LogicalVariable newVar);
-
-}
+package edu.uci.ics.hivesterix.logical.plan.visitor.base;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.hadoop.hive.ql.exec.Operator;
+import org.apache.hadoop.hive.ql.plan.AggregationDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
+import org.apache.hadoop.hive.ql.plan.PartitionDesc;
+import org.apache.hadoop.hive.ql.plan.UDTFDesc;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
+
+import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
+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.LogicalVariable;
+import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
+
+@SuppressWarnings("rawtypes")
+public interface Translator {
+
+    /**
+     * generate input schema
+     * 
+     * @param operator
+     * @return
+     */
+    public Schema generateInputSchema(Operator operator);
+
+    /**
+     * rewrite the names of output columns for feture expression evaluators to
+     * use
+     * 
+     * @param operator
+     */
+    public void rewriteOperatorOutputSchema(List<LogicalVariable> vars, Operator operator);
+
+    /**
+     * rewrite the names of output columns for feture expression evaluators to
+     * use
+     * 
+     * @param operator
+     */
+    public void rewriteOperatorOutputSchema(Operator operator);
+
+    /**
+     * rewrite an expression and substitute variables
+     * 
+     * @param expr
+     *            hive expression
+     */
+    public void rewriteExpression(ExprNodeDesc expr);
+
+    /**
+     * rewrite an expression and substitute variables
+     * 
+     * @param expr
+     *            hive expression
+     */
+    public void rewriteExpressionPartial(ExprNodeDesc expr);
+
+    /**
+     * get an assign operator as a child of parent
+     * 
+     * @param parent
+     * @param cols
+     * @param variables
+     * @return
+     */
+    public ILogicalOperator getAssignOperator(Mutable<ILogicalOperator> parent, List<ExprNodeDesc> cols,
+            ArrayList<LogicalVariable> variables);
+
+    /**
+     * get type for a logical variable
+     * 
+     * @param var
+     * @return type info
+     */
+    public TypeInfo getType(LogicalVariable var);
+
+    /**
+     * translate an expression from hive to Algebricks
+     * 
+     * @param desc
+     * @return
+     */
+    public Mutable<ILogicalExpression> translateScalarFucntion(ExprNodeDesc desc);
+
+    /**
+     * translate an aggregation from hive to Algebricks
+     * 
+     * @param aggregateDesc
+     * @return
+     */
+    public Mutable<ILogicalExpression> translateAggregation(AggregationDesc aggregateDesc);
+
+    /**
+     * translate unnesting (UDTF) function expression
+     * 
+     * @param aggregator
+     * @return
+     */
+    public Mutable<ILogicalExpression> translateUnnestFunction(UDTFDesc udtfDesc, Mutable<ILogicalExpression> argument);
+
+    /**
+     * get variable from a schema
+     * 
+     * @param schema
+     * @return
+     */
+    public List<LogicalVariable> getVariablesFromSchema(Schema schema);
+
+    /**
+     * get variable from name
+     * 
+     * @param name
+     * @return
+     */
+    public LogicalVariable getVariable(String name);
+
+    /**
+     * get variable from field name
+     * 
+     * @param name
+     * @return
+     */
+    public LogicalVariable getVariableFromFieldName(String name);
+
+    /**
+     * get variable from name, type
+     * 
+     * @param fieldName
+     * @param type
+     * @return
+     */
+    public LogicalVariable getVariable(String fieldName, TypeInfo type);
+
+    /**
+     * get new variable from name, type
+     * 
+     * @param fieldName
+     * @param type
+     * @return
+     */
+    public LogicalVariable getNewVariable(String fieldName, TypeInfo type);
+
+    /**
+     * update a name-variable binding
+     * 
+     * @param fieldName
+     * @param variable
+     */
+    public void updateVariable(String fieldName, LogicalVariable variable);
+
+    /**
+     * set the metadata provider
+     * 
+     * @param metadata
+     */
+    public void setMetadataProvider(IMetadataProvider<PartitionDesc, Object> metadata);
+
+    /**
+     * get the metadata provider
+     * 
+     * @param metadata
+     */
+    public IMetadataProvider<PartitionDesc, Object> getMetadataProvider();
+
+    /**
+     * replace the variable
+     * 
+     * @param oldVar
+     * @param newVar
+     */
+    public void replaceVariable(LogicalVariable oldVar, LogicalVariable newVar);
+
+}
diff --git a/hivesterix/pom.xml b/hivesterix/pom.xml
index 2bee50c..ba43c0d 100644
--- a/hivesterix/pom.xml
+++ b/hivesterix/pom.xml
@@ -17,7 +17,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>edu.uci.ics.hyracks</groupId>
 	<artifactId>hivesterix</artifactId>
-	<version>0.2.7-SNAPSHOT</version>
+	<version>0.2.10-SNAPSHOT</version>
 	<packaging>pom</packaging>
 	<name>hivesterix</name>
 
diff --git a/hyracks/hyracks-api/pom.xml b/hyracks/hyracks-api/pom.xml
index 0d75de4..6a56532 100644
--- a/hyracks/hyracks-api/pom.xml
+++ b/hyracks/hyracks-api/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -61,7 +61,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-ipc</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   	</dependency>
   	<dependency>
   		<groupId>org.apache.commons</groupId>
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/INCApplicationContext.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/INCApplicationContext.java
index 11a0558..3d70a40 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/INCApplicationContext.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/application/INCApplicationContext.java
@@ -15,12 +15,12 @@
 package edu.uci.ics.hyracks.api.application;
 
 import edu.uci.ics.hyracks.api.context.IHyracksRootContext;
+import edu.uci.ics.hyracks.api.resources.memory.IMemoryManager;
 
 /**
  * Application Context at the Node Controller for an application.
  * 
  * @author vinayakb
- * 
  */
 public interface INCApplicationContext extends IApplicationContext {
     /**
@@ -38,8 +38,7 @@
     public IHyracksRootContext getRootContext();
 
     /**
-     * Set an object that can be later retrieved by the
-     * {@link #getApplicationObject()} call.
+     * Set an object that can be later retrieved by the {@link #getApplicationObject()} call.
      * 
      * @param object
      *            Application Object
@@ -47,10 +46,16 @@
     public void setApplicationObject(Object object);
 
     /**
-     * Get the application object previously set by the
-     * {@link #setApplicationObject(Object)} call.
+     * Get the application object previously set by the {@link #setApplicationObject(Object)} call.
      * 
      * @return Application Object
      */
     public Object getApplicationObject();
+
+    /**
+     * Get the memory manager at the node.
+     * 
+     * @return Memory Manager
+     */
+    public IMemoryManager getMemoryManager();
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksCommonContext.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksCommonContext.java
index f5d7a90..c75f9f9 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksCommonContext.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksCommonContext.java
@@ -16,6 +16,7 @@
 
 import java.nio.ByteBuffer;
 
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.io.IIOManager;
 
 public interface IHyracksCommonContext {
@@ -23,5 +24,5 @@
 
     public IIOManager getIOManager();
 
-    public ByteBuffer allocateFrame();
+    public ByteBuffer allocateFrame() throws HyracksDataException;
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/IOperatorNodePushable.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/IOperatorNodePushable.java
index acdda02..0e3fefd 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/IOperatorNodePushable.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/IOperatorNodePushable.java
@@ -25,7 +25,8 @@
 
     public int getInputArity();
 
-    public void setOutputFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc);
+    public void setOutputFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc)
+            throws HyracksDataException;
 
     public IFrameWriter getInputFrameWriter(int index);
 
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/resources/memory/IMemoryManager.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/resources/memory/IMemoryManager.java
new file mode 100644
index 0000000..1017725
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/resources/memory/IMemoryManager.java
@@ -0,0 +1,11 @@
+package edu.uci.ics.hyracks.api.resources.memory;
+
+public interface IMemoryManager {
+    public long getMaximumMemory();
+
+    public long getAvailableMemory();
+
+    public boolean allocate(long memory);
+
+    public void deallocate(long memory);
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/rewriter/runtime/SuperActivityOperatorNodePushable.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/rewriter/runtime/SuperActivityOperatorNodePushable.java
index 7d50fa0..ffed337 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/rewriter/runtime/SuperActivityOperatorNodePushable.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/rewriter/runtime/SuperActivityOperatorNodePushable.java
@@ -167,7 +167,8 @@
     }
 
     @Override
-    public void setOutputFrameWriter(int clusterOutputIndex, IFrameWriter writer, RecordDescriptor recordDesc) {
+    public void setOutputFrameWriter(int clusterOutputIndex, IFrameWriter writer, RecordDescriptor recordDesc)
+            throws HyracksDataException {
         /**
          * set the right output frame writer
          */
diff --git a/hyracks/hyracks-client/pom.xml b/hyracks/hyracks-client/pom.xml
index 099c178..99ee616 100644
--- a/hyracks/hyracks-client/pom.xml
+++ b/hyracks/hyracks-client/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -39,22 +39,22 @@
  <dependency>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-api</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
  </dependency>
  <dependency>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-net</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
  </dependency>
  <dependency>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-comm</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
  </dependency>
   <dependency>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-dataflow-common</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-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 03432a8..51e4950 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
@@ -104,8 +104,8 @@
                             getSocketAddress(knownRecords[lastReadPartition]), jobId, resultSetId, lastReadPartition,
                             NUM_READ_BUFFERS);
                     lastMonitor = getMonitor(lastReadPartition);
-                    resultChannel.open(datasetClientCtx);
                     resultChannel.registerMonitor(lastMonitor);
+                    resultChannel.open(datasetClientCtx);
                 } catch (Exception e) {
                     throw new HyracksDataException(e);
                 }
@@ -142,8 +142,8 @@
                                 getSocketAddress(knownRecords[lastReadPartition]), jobId, resultSetId,
                                 lastReadPartition, NUM_READ_BUFFERS);
                         lastMonitor = getMonitor(lastReadPartition);
-                        resultChannel.open(datasetClientCtx);
                         resultChannel.registerMonitor(lastMonitor);
+                        resultChannel.open(datasetClientCtx);
                     } catch (Exception e) {
                         throw new HyracksDataException(e);
                     }
diff --git a/hyracks/hyracks-comm/pom.xml b/hyracks/hyracks-comm/pom.xml
index 6755171..f46971a 100644
--- a/hyracks/hyracks-comm/pom.xml
+++ b/hyracks/hyracks-comm/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -39,12 +39,12 @@
  <dependency>
  	<groupId>edu.uci.ics.hyracks</groupId>
  	<artifactId>hyracks-api</artifactId>
- 	<version>0.2.7-SNAPSHOT</version>
+ 	<version>0.2.10-SNAPSHOT</version>
  </dependency>
   <dependency>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-net</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-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 a30fd89..17638e8 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/pom.xml
+++ b/hyracks/hyracks-control/hyracks-control-cc/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-control</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -40,7 +40,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-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/adminconsole/pages/IndexPage.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/adminconsole/pages/IndexPage.java
index e2daff8..cd3ea6e 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/adminconsole/pages/IndexPage.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/adminconsole/pages/IndexPage.java
@@ -69,7 +69,6 @@
                 JSONObject o = item.getModelObject();
                 try {
                     item.add(new Label("job-id", o.getString("job-id")));
-                    item.add(new Label("application-name", o.getString("application-name")));
                     item.add(new Label("status", o.getString("status")));
                     item.add(new Label("create-time", o.getString("create-time")));
                     item.add(new Label("start-time", o.getString("start-time")));
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 16f36a6..9cd7886 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
@@ -14,6 +14,8 @@
  */
 package edu.uci.ics.hyracks.control.cc.job;
 
+import java.io.PrintWriter;
+import java.io.StringWriter;
 import java.util.EnumSet;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -345,7 +347,11 @@
                                 taskAttempt.put("end-time", ta.getEndTime());
                                 List<Exception> exceptions = ta.getExceptions();
                                 if (exceptions != null && !exceptions.isEmpty()) {
-                                    taskAttempt.put("failure-details", exceptions);
+                                    for(Exception exception : exceptions){
+                                        StringWriter exceptionWriter = new StringWriter();
+                                        exception.printStackTrace(new PrintWriter(exceptionWriter));
+                                        taskAttempt.put("failure-details", exceptionWriter.toString());
+                                    }
                                 }
                                 taskAttempts.put(taskAttempt);
                             }
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/resources/edu/uci/ics/hyracks/control/cc/adminconsole/pages/IndexPage.html b/hyracks/hyracks-control/hyracks-control-cc/src/main/resources/edu/uci/ics/hyracks/control/cc/adminconsole/pages/IndexPage.html
index 5810f23..4220932 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/resources/edu/uci/ics/hyracks/control/cc/adminconsole/pages/IndexPage.html
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/resources/edu/uci/ics/hyracks/control/cc/adminconsole/pages/IndexPage.html
@@ -38,9 +38,6 @@
                 <span wicket:id="job-id"></span>
             </td>
             <td>
-                <span wicket:id="application-name"></span>
-            </td>
-            <td>
                 <span wicket:id="status"></span>
             </td>
             <td>
diff --git a/hyracks/hyracks-control/hyracks-control-common/pom.xml b/hyracks/hyracks-control/hyracks-control-common/pom.xml
index 0056e99..1f3c764 100644
--- a/hyracks/hyracks-control/hyracks-control-common/pom.xml
+++ b/hyracks/hyracks-control/hyracks-control-common/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-control</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -41,7 +41,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-control/hyracks-control-nc/pom.xml b/hyracks/hyracks-control/hyracks-control-nc/pom.xml
index af384d4..006a07b 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/pom.xml
+++ b/hyracks/hyracks-control/hyracks-control-nc/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-control</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -40,19 +40,19 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-net</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-comm</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-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 3395d69..56b6654 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
@@ -20,6 +20,8 @@
 import java.util.HashMap;
 import java.util.Hashtable;
 import java.util.Map;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.logging.Logger;
 
 import edu.uci.ics.hyracks.api.application.INCApplicationContext;
 import edu.uci.ics.hyracks.api.comm.IPartitionCollector;
@@ -56,6 +58,8 @@
 import edu.uci.ics.hyracks.control.nc.resources.DefaultDeallocatableRegistry;
 
 public class Joblet implements IHyracksJobletContext, ICounterContext {
+    private static final Logger LOGGER = Logger.getLogger(Joblet.class.getName());
+
     private final NodeControllerService nodeController;
 
     private final INCApplicationContext appCtx;
@@ -86,6 +90,8 @@
 
     private final int frameSize;
 
+    private final AtomicLong memoryAllocation;
+
     private JobStatus cleanupStatus;
 
     private boolean cleanupPending;
@@ -97,6 +103,7 @@
         this.deploymentId = deploymentId;
         this.jobId = jobId;
         this.frameSize = acg.getFrameSize();
+        memoryAllocation = new AtomicLong();
         this.acg = acg;
         partitionRequestMap = new HashMap<PartitionId, IPartitionCollector>();
         env = new OperatorEnvironmentImpl(nodeController.getId());
@@ -201,6 +208,11 @@
     }
 
     public void close() {
+        long stillAllocated = memoryAllocation.get();
+        if (stillAllocated > 0) {
+            LOGGER.warning("Freeing leaked " + stillAllocated + " bytes");
+            appCtx.getMemoryManager().deallocate(stillAllocated);
+        }
         nodeController.getExecutor().execute(new Runnable() {
             @Override
             public void run() {
@@ -209,11 +221,20 @@
         });
     }
 
-    ByteBuffer allocateFrame() {
-        return ByteBuffer.allocate(getFrameSize());
+    ByteBuffer allocateFrame() throws HyracksDataException {
+        if (appCtx.getMemoryManager().allocate(frameSize)) {
+            memoryAllocation.addAndGet(frameSize);
+            return ByteBuffer.allocate(frameSize);
+        }
+        throw new HyracksDataException("Unable to allocate frame: Not enough memory");
     }
 
-    int getFrameSize() {
+    public void deallocateFrames(int nFrames) {
+        memoryAllocation.addAndGet(nFrames * frameSize);
+        appCtx.getMemoryManager().deallocate(nFrames * frameSize);
+    }
+
+    final int getFrameSize() {
         return frameSize;
     }
 
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 60859e3..6049a3b 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
@@ -69,6 +69,7 @@
 import edu.uci.ics.hyracks.control.nc.net.DatasetNetworkManager;
 import edu.uci.ics.hyracks.control.nc.net.NetworkManager;
 import edu.uci.ics.hyracks.control.nc.partitions.PartitionManager;
+import edu.uci.ics.hyracks.control.nc.resources.memory.MemoryManager;
 import edu.uci.ics.hyracks.control.nc.runtime.RootHyracksContext;
 import edu.uci.ics.hyracks.control.nc.work.AbortTasksWork;
 import edu.uci.ics.hyracks.control.nc.work.ApplicationMessageWork;
@@ -87,6 +88,8 @@
 public class NodeControllerService extends AbstractRemoteService {
     private static Logger LOGGER = Logger.getLogger(NodeControllerService.class.getName());
 
+    private static final double MEMORY_FUDGE_FACTOR = 0.8;
+
     private NCConfig ncConfig;
 
     private final String id;
@@ -139,6 +142,8 @@
 
     private final Mutable<FutureValue<Map<String, NodeControllerInfo>>> getNodeControllerInfosAcceptor;
 
+    private final MemoryManager memoryManager;
+
     public NodeControllerService(NCConfig ncConfig) throws Exception {
         this.ncConfig = ncConfig;
         id = ncConfig.nodeId;
@@ -165,6 +170,7 @@
         osMXBean = ManagementFactory.getOperatingSystemMXBean();
         registrationPending = true;
         getNodeControllerInfosAcceptor = new MutableObject<FutureValue<Map<String, NodeControllerInfo>>>();
+        memoryManager = new MemoryManager((long) (memoryMXBean.getHeapMemoryUsage().getMax() * MEMORY_FUDGE_FACTOR));
     }
 
     public IHyracksRootContext getRootContext() {
@@ -275,7 +281,7 @@
     }
 
     private void startApplication() throws Exception {
-        appCtx = new NCApplicationContext(serverCtx, ctx, id);
+        appCtx = new NCApplicationContext(serverCtx, ctx, id, memoryManager);
         String className = ncConfig.appNCMainClass;
         if (className != null) {
             Class<?> c = Class.forName(className);
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 1c92354..53e5a01 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
@@ -109,7 +109,7 @@
     }
 
     @Override
-    public ByteBuffer allocateFrame() {
+    public ByteBuffer allocateFrame() throws HyracksDataException {
         return joblet.allocateFrame();
     }
 
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 8a1f0d9..4b8eb53 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
@@ -19,18 +19,23 @@
 
 import edu.uci.ics.hyracks.api.application.INCApplicationContext;
 import edu.uci.ics.hyracks.api.context.IHyracksRootContext;
+import edu.uci.ics.hyracks.api.resources.memory.IMemoryManager;
 import edu.uci.ics.hyracks.control.common.application.ApplicationContext;
 import edu.uci.ics.hyracks.control.common.context.ServerContext;
+import edu.uci.ics.hyracks.control.nc.resources.memory.MemoryManager;
 
 public class NCApplicationContext extends ApplicationContext implements INCApplicationContext {
     private final String nodeId;
     private final IHyracksRootContext rootCtx;
+    private final MemoryManager memoryManager;
     private Object appObject;
 
-    public NCApplicationContext(ServerContext serverCtx, IHyracksRootContext rootCtx, String nodeId) throws IOException {
+    public NCApplicationContext(ServerContext serverCtx, IHyracksRootContext rootCtx, String nodeId,
+            MemoryManager memoryManager) throws IOException {
         super(serverCtx);
         this.nodeId = nodeId;
         this.rootCtx = rootCtx;
+        this.memoryManager = memoryManager;
     }
 
     @Override
@@ -56,4 +61,9 @@
     public Object getApplicationObject() {
         return appObject;
     }
+
+    @Override
+    public IMemoryManager getMemoryManager() {
+        return memoryManager;
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/resources/memory/MemoryManager.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/resources/memory/MemoryManager.java
new file mode 100644
index 0000000..8add260
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/resources/memory/MemoryManager.java
@@ -0,0 +1,40 @@
+package edu.uci.ics.hyracks.control.nc.resources.memory;
+
+import java.util.concurrent.atomic.AtomicLong;
+
+import edu.uci.ics.hyracks.api.resources.memory.IMemoryManager;
+
+public class MemoryManager implements IMemoryManager {
+    private final long maxMemory;
+
+    private final AtomicLong memory;
+
+    public MemoryManager(long maxMemory) {
+        this.maxMemory = maxMemory;
+        this.memory = new AtomicLong(maxMemory);
+    }
+
+    @Override
+    public long getMaximumMemory() {
+        return maxMemory;
+    }
+
+    @Override
+    public long getAvailableMemory() {
+        return memory.get();
+    }
+
+    @Override
+    public boolean allocate(long memory) {
+        if (this.memory.addAndGet(-memory) < 0) {
+            this.memory.addAndGet(memory);
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public void deallocate(long memory) {
+        this.memory.addAndGet(memory);
+    }
+}
\ 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/NotifyTaskFailureWork.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/NotifyTaskFailureWork.java
index c4784ff..56379d2 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/NotifyTaskFailureWork.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/NotifyTaskFailureWork.java
@@ -43,6 +43,7 @@
                 dpm.abortReader(jobId);
             }
             ncs.getClusterController().notifyTaskFailure(jobId, task.getTaskAttemptId(), ncs.getId(), exceptions);
+            //exceptions.get(0).printStackTrace();
         } catch (Exception e) {
             e.printStackTrace();
         }
diff --git a/hyracks/hyracks-control/pom.xml b/hyracks/hyracks-control/pom.xml
index a98ffe5..7b43c1f 100644
--- a/hyracks/hyracks-control/pom.xml
+++ b/hyracks/hyracks-control/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-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 90d0229..0758c9a 100644
--- a/hyracks/hyracks-data/hyracks-data-std/pom.xml
+++ b/hyracks/hyracks-data/hyracks-data-std/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-data</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -41,7 +41,7 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-api</artifactId>
-  	<version>0.2.7-SNAPSHOT</version>
+  	<version>0.2.10-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/hyracks/hyracks-data/pom.xml b/hyracks/hyracks-data/pom.xml
index 32dd51d..a5ffd98 100644
--- a/hyracks/hyracks-data/pom.xml
+++ b/hyracks/hyracks-data/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-dataflow-common/pom.xml b/hyracks/hyracks-dataflow-common/pom.xml
index 6e270bf..d779ca4 100644
--- a/hyracks/hyracks-dataflow-common/pom.xml
+++ b/hyracks/hyracks-dataflow-common/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -40,14 +40,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-data-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   	</dependency>
   </dependencies>
 </project>
diff --git a/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/comm/io/FrameDeserializingDataReader.java b/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/comm/io/FrameDeserializingDataReader.java
index 424af4c..b94a219 100644
--- a/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/comm/io/FrameDeserializingDataReader.java
+++ b/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/comm/io/FrameDeserializingDataReader.java
@@ -34,7 +34,7 @@
     private final FrameDeserializer frameDeserializer;
 
     public FrameDeserializingDataReader(IHyracksTaskContext ctx, IFrameReader frameReader,
-            RecordDescriptor recordDescriptor) {
+            RecordDescriptor recordDescriptor) throws HyracksDataException {
         buffer = ctx.allocateFrame();
         this.frameReader = frameReader;
         this.frameDeserializer = new FrameDeserializer(ctx.getFrameSize(), recordDescriptor);
diff --git a/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/comm/io/SerializingDataWriter.java b/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/comm/io/SerializingDataWriter.java
index 3d23c31..4392fd6 100644
--- a/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/comm/io/SerializingDataWriter.java
+++ b/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/comm/io/SerializingDataWriter.java
@@ -39,7 +39,8 @@
 
     private boolean open;
 
-    public SerializingDataWriter(IHyracksTaskContext ctx, RecordDescriptor recordDescriptor, IFrameWriter frameWriter) {
+    public SerializingDataWriter(IHyracksTaskContext ctx, RecordDescriptor recordDescriptor, IFrameWriter frameWriter)
+            throws HyracksDataException {
         buffer = ctx.allocateFrame();
         tb = new ArrayTupleBuilder(recordDescriptor.getFieldCount());
         this.recordDescriptor = recordDescriptor;
diff --git a/hyracks/hyracks-dataflow-hadoop/pom.xml b/hyracks/hyracks-dataflow-hadoop/pom.xml
index 6468118..5c05956 100644
--- a/hyracks/hyracks-dataflow-hadoop/pom.xml
+++ b/hyracks/hyracks-dataflow-hadoop/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -40,14 +40,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
@@ -67,7 +67,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   </dependencies>
diff --git a/hyracks/hyracks-dataflow-hadoop/src/main/java/edu/uci/ics/hyracks/dataflow/hadoop/mapreduce/ReduceWriter.java b/hyracks/hyracks-dataflow-hadoop/src/main/java/edu/uci/ics/hyracks/dataflow/hadoop/mapreduce/ReduceWriter.java
index 5fbd2a5..f84ffda 100644
--- a/hyracks/hyracks-dataflow-hadoop/src/main/java/edu/uci/ics/hyracks/dataflow/hadoop/mapreduce/ReduceWriter.java
+++ b/hyracks/hyracks-dataflow-hadoop/src/main/java/edu/uci/ics/hyracks/dataflow/hadoop/mapreduce/ReduceWriter.java
@@ -60,7 +60,7 @@
     public ReduceWriter(IHyracksTaskContext ctx, HadoopHelper helper, int[] groupFields,
             IBinaryComparatorFactory[] comparatorFactories, RecordDescriptor recordDescriptor,
             Reducer<K2, V2, K3, V3> reducer, RecordWriter<K3, V3> recordWriter, TaskAttemptID taId,
-            TaskAttemptContext taskAttemptContext) {
+            TaskAttemptContext taskAttemptContext) throws HyracksDataException {
         this.ctx = ctx;
         this.helper = helper;
         this.groupFields = groupFields;
diff --git a/hyracks/hyracks-dataflow-hadoop/src/main/java/edu/uci/ics/hyracks/dataflow/hadoop/mapreduce/ShuffleFrameReader.java b/hyracks/hyracks-dataflow-hadoop/src/main/java/edu/uci/ics/hyracks/dataflow/hadoop/mapreduce/ShuffleFrameReader.java
index b34fa9f..30ba3ec 100644
--- a/hyracks/hyracks-dataflow-hadoop/src/main/java/edu/uci/ics/hyracks/dataflow/hadoop/mapreduce/ShuffleFrameReader.java
+++ b/hyracks/hyracks-dataflow-hadoop/src/main/java/edu/uci/ics/hyracks/dataflow/hadoop/mapreduce/ShuffleFrameReader.java
@@ -134,7 +134,7 @@
         private RunFileWriter rfw;
         private int blockId;
 
-        public RunInfo() {
+        public RunInfo() throws HyracksDataException {
             buffer = ctx.allocateFrame();
             fta = new FrameTupleAppender(ctx.getFrameSize());
         }
diff --git a/hyracks/hyracks-dataflow-std/pom.xml b/hyracks/hyracks-dataflow-std/pom.xml
index f88e852..dafc03f 100644
--- a/hyracks/hyracks-dataflow-std/pom.xml
+++ b/hyracks/hyracks-dataflow-std/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -41,14 +41,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-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/file/FileScanOperatorDescriptor.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/file/FileScanOperatorDescriptor.java
index 82a7797..d36b29e 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/file/FileScanOperatorDescriptor.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/file/FileScanOperatorDescriptor.java
@@ -45,7 +45,7 @@
 
     @Override
     public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
-            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
+            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException {
         final FileSplit split = fileSplitProvider.getFileSplits()[partition];
         final ITupleParser tp = tupleParserFactory.createTupleParser(ctx);
         return new AbstractUnaryOutputSourceOperatorNodePushable() {
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/file/ITupleParserFactory.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/file/ITupleParserFactory.java
index 7393072..e2518ee 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/file/ITupleParserFactory.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/file/ITupleParserFactory.java
@@ -17,7 +17,8 @@
 import java.io.Serializable;
 
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 
 public interface ITupleParserFactory extends Serializable {
-    public ITupleParser createTupleParser(IHyracksTaskContext ctx);
+    public ITupleParser createTupleParser(IHyracksTaskContext ctx) throws HyracksDataException;
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/group/HashSpillableTableFactory.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/group/HashSpillableTableFactory.java
index 8cf929e..ecd5284 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/group/HashSpillableTableFactory.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/group/HashSpillableTableFactory.java
@@ -366,8 +366,9 @@
              * When frames are already created, they are recycled.
              * 
              * @return Whether a new frame is added successfully.
+             * @throws HyracksDataException
              */
-            private boolean nextAvailableFrame() {
+            private boolean nextAvailableFrame() throws HyracksDataException {
                 // Return false if the number of frames is equal to the limit.
                 if (lastBufIndex + 1 >= framesLimit)
                     return false;
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/group/hash/GroupingHashTable.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/group/hash/GroupingHashTable.java
index f11b12a..f8ba003 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/group/hash/GroupingHashTable.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/group/hash/GroupingHashTable.java
@@ -142,7 +142,7 @@
         outputTupleBuilder = new ArrayTupleBuilder(outRecordDescriptor.getFields().length);
     }
 
-    private void addNewBuffer() {
+    private void addNewBuffer() throws HyracksDataException {
         ByteBuffer buffer = ctx.allocateFrame();
         buffer.position(0);
         buffer.limit(buffer.capacity());
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/group/preclustered/PreclusteredGroupWriter.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/group/preclustered/PreclusteredGroupWriter.java
index 11458ad..7773765 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/group/preclustered/PreclusteredGroupWriter.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/group/preclustered/PreclusteredGroupWriter.java
@@ -46,7 +46,7 @@
 
     public PreclusteredGroupWriter(IHyracksTaskContext ctx, int[] groupFields, IBinaryComparator[] comparators,
             IAggregatorDescriptor aggregator, RecordDescriptor inRecordDesc, RecordDescriptor outRecordDesc,
-            IFrameWriter writer) {
+            IFrameWriter writer) throws HyracksDataException {
         this.groupFields = groupFields;
         this.comparators = comparators;
         this.aggregator = aggregator;
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/HybridHashJoinOperatorDescriptor.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/HybridHashJoinOperatorDescriptor.java
index 37fa40b..1bfa413 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/HybridHashJoinOperatorDescriptor.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/HybridHashJoinOperatorDescriptor.java
@@ -181,7 +181,7 @@
 
         @Override
         public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
-                IRecordDescriptorProvider recordDescProvider, final int partition, final int nPartitions) {
+                IRecordDescriptorProvider recordDescProvider, final int partition, final int nPartitions) throws HyracksDataException {
             final RecordDescriptor rd0 = recordDescProvider.getInputRecordDescriptor(joinAid, 0);
             final RecordDescriptor rd1 = recordDescProvider.getInputRecordDescriptor(getActivityId(), 0);
             final IBinaryComparator[] comparators = new IBinaryComparator[comparatorFactories.length];
@@ -370,7 +370,8 @@
 
         @Override
         public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
-                IRecordDescriptorProvider recordDescProvider, final int partition, final int nPartitions) {
+                IRecordDescriptorProvider recordDescProvider, final int partition, final int nPartitions)
+                throws HyracksDataException {
             final RecordDescriptor rd0 = recordDescProvider.getInputRecordDescriptor(getActivityId(), 0);
             final RecordDescriptor rd1 = recordDescProvider.getInputRecordDescriptor(buildAid, 0);
             final IBinaryComparator[] comparators = new IBinaryComparator[comparatorFactories.length];
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/NestedLoopJoin.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/NestedLoopJoin.java
index 7585698..2f719fa 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/NestedLoopJoin.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/NestedLoopJoin.java
@@ -109,7 +109,7 @@
         reloadFrame(outerBuffer);
     }
 
-    private void createAndCopyFrame(ByteBuffer outerBuffer) {
+    private void createAndCopyFrame(ByteBuffer outerBuffer) throws HyracksDataException {
         ByteBuffer outerBufferCopy = ctx.allocateFrame();
         FrameUtils.copy(outerBuffer, outerBufferCopy);
         outBuffers.add(outerBufferCopy);
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 47a9a1c..cd32c81 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
@@ -39,8 +39,8 @@
 
 /**
  * @author pouria
-       This class mainly applies one level of HHJ on a pair of
-       relations. It is always called by the descriptor.
+ *         This class mainly applies one level of HHJ on a pair of
+ *         relations. It is always called by the descriptor.
  */
 public class OptimizedHybridHashJoin {
 
@@ -49,7 +49,7 @@
     private final int INVALID_BUFFER = -2;
     private final int UNALLOCATED_FRAME = -3;
     private final int BUFFER_FOR_RESIDENT_PARTS = -1;
-    
+
     private IHyracksTaskContext ctx;
 
     private final String rel0Name;
@@ -107,10 +107,10 @@
         this.memForJoin = memForJoin;
         this.buildRd = buildRd;
         this.probeRd = probeRd;
-        this.buildHpc = buildHpc; 	
-        this.probeHpc = probeHpc; 	
-        this.buildKeys = keys1; 	
-        this.probeKeys = keys0;		
+        this.buildHpc = buildHpc;
+        this.probeHpc = probeHpc;
+        this.buildKeys = keys1;
+        this.probeKeys = keys0;
         this.comparators = comparators;
         this.rel0Name = rel0Name;
         this.rel1Name = rel1Name;
@@ -136,10 +136,10 @@
         this.memForJoin = memForJoin;
         this.buildRd = buildRd;
         this.probeRd = probeRd;
-        this.buildHpc = buildHpc; 	
-        this.probeHpc = probeHpc; 	
-        this.buildKeys = keys1; 	
-        this.probeKeys = keys0;		
+        this.buildHpc = buildHpc;
+        this.probeHpc = probeHpc;
+        this.buildKeys = keys1;
+        this.probeKeys = keys0;
         this.comparators = comparators;
         this.rel0Name = rel0Name;
         this.rel1Name = rel1Name;
@@ -162,7 +162,7 @@
         }
     }
 
-    public void initBuild() {
+    public void initBuild() throws HyracksDataException {
         memBuffs = new ByteBuffer[memForJoin];
         curPBuff = new int[numOfPartitions];
         nextBuff = new int[memForJoin];
@@ -191,12 +191,12 @@
     public void build(ByteBuffer buffer) throws HyracksDataException {
         accessorBuild.reset(buffer);
         int tupleCount = accessorBuild.getTupleCount();
-   
+
         boolean print = false;
-    	if(print){
-    		accessorBuild.prettyPrint();
-    	}
-        
+        if (print) {
+            accessorBuild.prettyPrint();
+        }
+
         for (int i = 0; i < tupleCount; ++i) {
             int pid = buildHpc.partition(accessorBuild, i, numOfPartitions);
             processTuple(i, pid);
@@ -225,7 +225,7 @@
                     buildTupAppender.reset(memBuffs[pidToSpill], true);
                     processTuple(tid, pid);
                     break;
-                }  //New Buffer allocated successfully
+                } //New Buffer allocated successfully
                 partition = memBuffs[curPBuff[pid]]; //Current Buffer for the partition is now updated by allocateFreeBuffer() call above
                 buildTupAppender.reset(partition, true);
                 if (!buildTupAppender.append(accessorBuild, tid)) {
@@ -250,7 +250,7 @@
         }
     }
 
-    private int allocateFreeBuffer(int pid) {
+    private int allocateFreeBuffer(int pid) throws HyracksDataException {
         if (nextFreeBuffIx != NO_MORE_FREE_BUFFER) {
             if (memBuffs[nextFreeBuffIx] == null) {
                 memBuffs[nextFreeBuffIx] = ctx.allocateFrame();
@@ -425,7 +425,7 @@
     private ArrayList<Integer> selectPartitionsToReload() {
         ArrayList<Integer> p = new ArrayList<Integer>();
         for (int i = pStatus.nextSetBit(0); i >= 0; i = pStatus.nextSetBit(i + 1)) {
-            if (buildPSizeInFrames[i]>0 && (freeFramesCounter - buildPSizeInFrames[i] >= 0) ) {
+            if (buildPSizeInFrames[i] > 0 && (freeFramesCounter - buildPSizeInFrames[i] >= 0)) {
                 p.add(i);
                 freeFramesCounter -= buildPSizeInFrames[i];
             }
@@ -457,7 +457,7 @@
         }
     }
 
-    public void initProbe() {
+    public void initProbe() throws HyracksDataException {
 
         sPartBuffs = new ByteBuffer[numOfSpilledParts];
         for (int i = 0; i < numOfSpilledParts; i++) {
@@ -468,7 +468,7 @@
         /* We only need to allocate one frame per spilled partition. 
          * Resident partitions do not need frames in probe, as their tuples join 
          * immediately with the resident build tuples using the inMemoryHashJoin */
-        for (int i = 0; i < numOfPartitions; i++) { 
+        for (int i = 0; i < numOfPartitions; i++) {
             curPBuff[i] = (pStatus.get(i)) ? nextBuffIxToAlloc++ : BUFFER_FOR_RESIDENT_PARTS;
         }
         probePSizeInTups = new int[numOfPartitions];
@@ -488,10 +488,10 @@
         int tupleCount = accessorProbe.getTupleCount();
 
         boolean print = false;
-    	if(print){
-    		accessorProbe.prettyPrint();
-    	}
-        
+        if (print) {
+            accessorProbe.prettyPrint();
+        }
+
         if (numOfSpilledParts == 0) {
             inMemJoiner.join(buffer, writer);
             return;
@@ -508,14 +508,14 @@
                         probeTupAppenderToSpilled.reset(buff, needToClear);
                         if (probeTupAppenderToSpilled.append(accessorProbe, i)) {
                             break;
-                        } 
+                        }
                         probeWrite(pid, buff);
                         buff.clear();
                         needToClear = true;
                     }
                 } else { //pid is Resident
                     while (true) {
-                        if (probeTupAppenderToResident.append(accessorProbe, i)){
+                        if (probeTupAppenderToResident.append(accessorProbe, i)) {
                             break;
                         }
                         inMemJoiner.join(probeResBuff, writer);
@@ -635,8 +635,8 @@
                 + freeFramesCounter;
         return s;
     }
-    
-    public boolean isTableEmpty(){
-    	return this.isTableEmpty;
+
+    public boolean isTableEmpty() {
+        return this.isTableEmpty;
     }
 }
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/OptimizedHybridHashJoinOperatorDescriptor.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/OptimizedHybridHashJoinOperatorDescriptor.java
index 35d2468..95b7a3c 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/OptimizedHybridHashJoinOperatorDescriptor.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/join/OptimizedHybridHashJoinOperatorDescriptor.java
@@ -335,7 +335,8 @@
 
         @Override
         public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
-                IRecordDescriptorProvider recordDescProvider, final int partition, final int nPartitions) {
+                IRecordDescriptorProvider recordDescProvider, final int partition, final int nPartitions)
+                throws HyracksDataException {
 
             final RecordDescriptor probeRd = recordDescProvider.getInputRecordDescriptor(buildAid, 0);
             final RecordDescriptor buildRd = recordDescProvider.getInputRecordDescriptor(getActivityId(), 0);
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/misc/MaterializingOperatorDescriptor.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/misc/MaterializingOperatorDescriptor.java
index ac5a627..89c20d6 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/misc/MaterializingOperatorDescriptor.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/misc/MaterializingOperatorDescriptor.java
@@ -19,6 +19,7 @@
 import java.io.IOException;
 import java.nio.ByteBuffer;
 
+import edu.uci.ics.hyracks.api.comm.IFrameWriter;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.dataflow.ActivityId;
 import edu.uci.ics.hyracks.api.dataflow.IActivityGraphBuilder;
@@ -36,6 +37,7 @@
 import edu.uci.ics.hyracks.dataflow.std.base.AbstractOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.base.AbstractStateObject;
 import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputSinkOperatorNodePushable;
+import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputUnaryOutputOperatorNodePushable;
 import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryOutputSourceOperatorNodePushable;
 
 public class MaterializingOperatorDescriptor extends AbstractOperatorDescriptor {
@@ -43,24 +45,43 @@
 
     private final static int MATERIALIZER_ACTIVITY_ID = 0;
     private final static int READER_ACTIVITY_ID = 1;
+    private final static int MATERIALIZER_READER_ACTIVITY_ID = 2;
+
+    private boolean isSingleActivity;
 
     public MaterializingOperatorDescriptor(IOperatorDescriptorRegistry spec, RecordDescriptor recordDescriptor) {
+        this(spec, recordDescriptor, false);
+    }
+
+    public MaterializingOperatorDescriptor(IOperatorDescriptorRegistry spec, RecordDescriptor recordDescriptor,
+            boolean isSingleActivity) {
         super(spec, 1, 1);
         recordDescriptors[0] = recordDescriptor;
+        this.isSingleActivity = isSingleActivity;
     }
 
     @Override
     public void contributeActivities(IActivityGraphBuilder builder) {
-        MaterializerActivityNode ma = new MaterializerActivityNode(new ActivityId(odId, MATERIALIZER_ACTIVITY_ID));
-        ReaderActivityNode ra = new ReaderActivityNode(new ActivityId(odId, READER_ACTIVITY_ID));
+        if (isSingleActivity) {
+            MaterializerReaderActivityNode mra = new MaterializerReaderActivityNode(new ActivityId(odId,
+                    MATERIALIZER_READER_ACTIVITY_ID));
 
-        builder.addActivity(this, ma);
-        builder.addSourceEdge(0, ma, 0);
+            builder.addActivity(this, mra);
+            builder.addSourceEdge(0, mra, 0);
+            builder.addTargetEdge(0, mra, 0);
+        } else {
+            MaterializerActivityNode ma = new MaterializerActivityNode(new ActivityId(odId, MATERIALIZER_ACTIVITY_ID));
+            ReaderActivityNode ra = new ReaderActivityNode(new ActivityId(odId, READER_ACTIVITY_ID));
 
-        builder.addActivity(this, ra);
-        builder.addTargetEdge(0, ra, 0);
+            builder.addActivity(this, ma);
+            builder.addSourceEdge(0, ma, 0);
 
-        builder.addBlockingEdge(ma, ra);
+            builder.addActivity(this, ra);
+            builder.addTargetEdge(0, ra, 0);
+
+            builder.addBlockingEdge(ma, ra);
+        }
+
     }
 
     public static class MaterializerTaskState extends AbstractStateObject {
@@ -82,6 +103,76 @@
         public void fromBytes(DataInput in) throws IOException {
 
         }
+
+        public void open(IHyracksTaskContext ctx) throws HyracksDataException {
+            FileReference file = ctx.getJobletContext().createManagedWorkspaceFile(
+                    MaterializingOperatorDescriptor.class.getSimpleName());
+            out = new RunFileWriter(file, ctx.getIOManager());
+            out.open();
+        }
+
+        public void appendFrame(ByteBuffer buffer) throws HyracksDataException {
+            out.nextFrame(buffer);
+        }
+
+        public void writeOut(IFrameWriter writer, ByteBuffer frame) throws HyracksDataException {
+            RunFileReader in = out.createReader();
+            writer.open();
+            try {
+                in.open();
+                while (in.nextFrame(frame)) {
+                    frame.flip();
+                    writer.nextFrame(frame);
+                    frame.clear();
+                }
+                in.close();
+            } catch (Exception e) {
+                writer.fail();
+                throw new HyracksDataException(e);
+            } finally {
+                writer.close();
+            }
+        }
+    }
+
+    private final class MaterializerReaderActivityNode extends AbstractActivityNode {
+        private static final long serialVersionUID = 1L;
+
+        public MaterializerReaderActivityNode(ActivityId id) {
+            super(id);
+        }
+
+        @Override
+        public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
+                IRecordDescriptorProvider recordDescProvider, final int partition, int nPartitions) {
+            return new AbstractUnaryInputUnaryOutputOperatorNodePushable() {
+                private MaterializerTaskState state;
+
+                @Override
+                public void open() throws HyracksDataException {
+                    state = new MaterializerTaskState(ctx.getJobletContext().getJobId(), new TaskId(getActivityId(),
+                            partition));
+                    state.open(ctx);
+                }
+
+                @Override
+                public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+                    state.appendFrame(buffer);
+                }
+
+                @Override
+                public void fail() throws HyracksDataException {
+                }
+
+                @Override
+                public void close() throws HyracksDataException {
+                    state.out.close();
+                    ByteBuffer frame = ctx.allocateFrame();
+                    state.writeOut(writer, frame);
+                }
+
+            };
+        }
     }
 
     private final class MaterializerActivityNode extends AbstractActivityNode {
@@ -101,15 +192,12 @@
                 public void open() throws HyracksDataException {
                     state = new MaterializerTaskState(ctx.getJobletContext().getJobId(), new TaskId(getActivityId(),
                             partition));
-                    FileReference file = ctx.getJobletContext().createManagedWorkspaceFile(
-                            MaterializingOperatorDescriptor.class.getSimpleName());
-                    state.out = new RunFileWriter(file, ctx.getIOManager());
-                    state.out.open();
+                    state.open(ctx);
                 }
 
                 @Override
                 public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
-                    state.out.nextFrame(buffer);
+                    state.appendFrame(buffer);
                 }
 
                 @Override
@@ -141,22 +229,7 @@
                     ByteBuffer frame = ctx.allocateFrame();
                     MaterializerTaskState state = (MaterializerTaskState) ctx.getStateObject(new TaskId(new ActivityId(
                             getOperatorId(), MATERIALIZER_ACTIVITY_ID), partition));
-                    RunFileReader in = state.out.createReader();
-                    writer.open();
-                    try {
-                        in.open();
-                        while (in.nextFrame(frame)) {
-                            frame.flip();
-                            writer.nextFrame(frame);
-                            frame.clear();
-                        }
-                        in.close();
-                    } catch (Exception e) {
-                        writer.fail();
-                        throw new HyracksDataException(e);
-                    } finally {
-                        writer.close();
-                    }
+                    state.writeOut(writer, frame);
                 }
 
                 @Override
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/result/ResultWriterOperatorDescriptor.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/result/ResultWriterOperatorDescriptor.java
index 7330590..42ed59e 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/result/ResultWriterOperatorDescriptor.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/result/ResultWriterOperatorDescriptor.java
@@ -57,7 +57,8 @@
 
     @Override
     public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
-            IRecordDescriptorProvider recordDescProvider, final int partition, final int nPartitions) {
+            IRecordDescriptorProvider recordDescProvider, final int partition, final int nPartitions)
+            throws HyracksDataException {
         final IDatasetPartitionManager dpm = ctx.getDatasetPartitionManager();
 
         final ByteBuffer outputBuffer = ctx.allocateFrame();
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/sort/BSTMemMgr.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/sort/BSTMemMgr.java
index d1d0d5c..110bddb 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/sort/BSTMemMgr.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/sort/BSTMemMgr.java
@@ -632,7 +632,7 @@
         BSTNodeUtil.setPrev(frameIx, offset, BSTNodeUtil.INVALID_INDEX, BSTNodeUtil.INVALID_INDEX, frames);
     }
 
-    private ByteBuffer allocateFrame() {
+    private ByteBuffer allocateFrame() throws HyracksDataException {
         return ctx.allocateFrame();
     }
 
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/sort/ExternalSortRunGenerator.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/sort/ExternalSortRunGenerator.java
index 6e297a7..b149e30 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/sort/ExternalSortRunGenerator.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/sort/ExternalSortRunGenerator.java
@@ -36,7 +36,7 @@
 
     public ExternalSortRunGenerator(IHyracksTaskContext ctx, int[] sortFields,
             INormalizedKeyComputerFactory firstKeyNormalizerFactory, IBinaryComparatorFactory[] comparatorFactories,
-            RecordDescriptor recordDesc, int framesLimit) {
+            RecordDescriptor recordDesc, int framesLimit) throws HyracksDataException {
         this.ctx = ctx;
         frameSorter = new FrameSorter(ctx, sortFields, firstKeyNormalizerFactory, comparatorFactories, recordDesc);
         runs = new LinkedList<IFrameReader>();
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/sort/FrameSorter.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/sort/FrameSorter.java
index cb7b311..76f411b 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/sort/FrameSorter.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/sort/FrameSorter.java
@@ -17,6 +17,7 @@
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Random;
 
 import edu.uci.ics.hyracks.api.comm.IFrameWriter;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
@@ -48,9 +49,11 @@
     private int[] tPointers;
     private int tupleCount;
 
+    private Random rand = new Random();
+
     public FrameSorter(IHyracksTaskContext ctx, int[] sortFields,
             INormalizedKeyComputerFactory firstKeyNormalizerFactory, IBinaryComparatorFactory[] comparatorFactories,
-            RecordDescriptor recordDescriptor) {
+            RecordDescriptor recordDescriptor) throws HyracksDataException {
         this.ctx = ctx;
         this.sortFields = sortFields;
         nkc = firstKeyNormalizerFactory == null ? null : firstKeyNormalizerFactory.createNormalizedKeyComputer();
@@ -76,7 +79,7 @@
         return dataFrameCount;
     }
 
-    public void insertFrame(ByteBuffer buffer) {
+    public void insertFrame(ByteBuffer buffer) throws HyracksDataException {
         ByteBuffer copyFrame;
         if (dataFrameCount == buffers.size()) {
             copyFrame = ctx.allocateFrame();
@@ -116,6 +119,7 @@
             }
         }
         if (tupleCount > 0) {
+            shuffle(tPointers, 4, tupleCount);
             sort(tPointers, 0, tupleCount);
         }
     }
@@ -240,6 +244,18 @@
         return 0;
     }
 
+    private void shuffle(int[] tPointers, int interval, int tupleCount) {
+        for (int i = tupleCount; i > 1; i--) {
+            int next = rand.nextInt(i) * interval;
+            int target = (i - 1) * interval;
+            for (int j = 0; j < interval; j++) {
+                int drawn = tPointers[next + j];
+                tPointers[next + j] = tPointers[target + j];
+                tPointers[target + j] = drawn;
+            }
+        }
+    }
+
     public void close() {
         this.buffers.clear();
     }
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/structures/ISerializableTable.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/structures/ISerializableTable.java
index 7cbf41b..ce6c00c 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/structures/ISerializableTable.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/structures/ISerializableTable.java
@@ -14,9 +14,11 @@
  */
 package edu.uci.ics.hyracks.dataflow.std.structures;
 
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
 public interface ISerializableTable {
 
-    public void insert(int entry, TuplePointer tuplePointer);
+    public void insert(int entry, TuplePointer tuplePointer) throws HyracksDataException;
 
     public void getTuplePointer(int entry, int offset, TuplePointer tuplePointer);
 
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/structures/SerializableHashTable.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/structures/SerializableHashTable.java
index 54dd7a7..a245c9d 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/structures/SerializableHashTable.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/structures/SerializableHashTable.java
@@ -18,6 +18,7 @@
 import java.util.List;
 
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 
 /**
  * An entry in the table is: #elements, #no-empty elements; fIndex, tIndex;
@@ -38,7 +39,7 @@
     private int headerFrameCount = 0;
     private TuplePointer tempTuplePointer = new TuplePointer();
 
-    public SerializableHashTable(int tableSize, final IHyracksTaskContext ctx) {
+    public SerializableHashTable(int tableSize, final IHyracksTaskContext ctx) throws HyracksDataException {
         this.ctx = ctx;
         int frameSize = ctx.getFrameSize();
 
@@ -53,7 +54,7 @@
     }
 
     @Override
-    public void insert(int entry, TuplePointer pointer) {
+    public void insert(int entry, TuplePointer pointer) throws HyracksDataException {
         int hFrameIndex = getHeaderFrameIndex(entry);
         int headerOffset = getHeaderFrameOffset(entry);
         IntSerDeBuffer header = headers[hFrameIndex];
@@ -143,7 +144,8 @@
         currentLargestFrameIndex = 0;
     }
 
-    private void insertNewEntry(IntSerDeBuffer header, int headerOffset, int entryCapacity, TuplePointer pointer) {
+    private void insertNewEntry(IntSerDeBuffer header, int headerOffset, int entryCapacity, TuplePointer pointer)
+            throws HyracksDataException {
         IntSerDeBuffer lastFrame = contents.get(currentLargestFrameIndex);
         int lastIndex = frameCurrentIndex.get(currentLargestFrameIndex);
         int requiredIntCapacity = entryCapacity * 2;
@@ -191,7 +193,7 @@
     }
 
     private void insertNonFirstTuple(IntSerDeBuffer header, int headerOffset, int frameIndex, int offsetIndex,
-            TuplePointer pointer) {
+            TuplePointer pointer) throws HyracksDataException {
         IntSerDeBuffer frame = contents.get(frameIndex);
         int entryItems = frame.getInt(offsetIndex);
         int entryUsedItems = frame.getInt(offsetIndex + 1);
diff --git a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/util/DeserializedOperatorNodePushable.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/util/DeserializedOperatorNodePushable.java
index c89bfba..aff4273 100644
--- a/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/util/DeserializedOperatorNodePushable.java
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/util/DeserializedOperatorNodePushable.java
@@ -40,7 +40,8 @@
     }
 
     @Override
-    public void setOutputFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc) {
+    public void setOutputFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc)
+            throws HyracksDataException {
         delegate.setDataWriter(index, new SerializingDataWriter(ctx, recordDesc, writer));
     }
 
diff --git a/hyracks/hyracks-dist/pom.xml b/hyracks/hyracks-dist/pom.xml
index 7e9526b..ab7ea53 100755
--- a/hyracks/hyracks-dist/pom.xml
+++ b/hyracks/hyracks-dist/pom.xml
@@ -18,7 +18,7 @@
 	<parent>
 		<artifactId>hyracks</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 
 	<artifactId>hyracks-dist</artifactId>
diff --git a/hyracks/hyracks-documentation/pom.xml b/hyracks/hyracks-documentation/pom.xml
index a814994..4bc3f25 100644
--- a/hyracks/hyracks-documentation/pom.xml
+++ b/hyracks/hyracks-documentation/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
diff --git a/hyracks/hyracks-examples/btree-example/btreeclient/pom.xml b/hyracks/hyracks-examples/btree-example/btreeclient/pom.xml
index 0a5331f..27ab200 100644
--- a/hyracks/hyracks-examples/btree-example/btreeclient/pom.xml
+++ b/hyracks/hyracks-examples/btree-example/btreeclient/pom.xml
@@ -20,26 +20,26 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>btree-example</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks.examples.btree</groupId>
   		<artifactId>btreehelper</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-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/PrimaryIndexBulkLoadExample.java b/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexBulkLoadExample.java
index 1431d0f..a027570 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
@@ -149,7 +149,8 @@
         IIndexDataflowHelperFactory dataflowHelperFactory = new BTreeDataflowHelperFactory();
         TreeIndexBulkLoadOperatorDescriptor btreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
                 storageManager, lcManagerProvider, btreeSplitProvider, typeTraits, comparatorFactories, null,
-                fieldPermutation, 0.7f, false, 1000L, dataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
+                fieldPermutation, 0.7f, false, 1000L, true, 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/SecondaryIndexBulkLoadExample.java b/hyracks/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexBulkLoadExample.java
index b484f85..805660f 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
@@ -141,7 +141,8 @@
         IFileSplitProvider btreeSplitProvider = JobHelper.createFileSplitProvider(splitNCs, options.secondaryBTreeName);
         TreeIndexBulkLoadOperatorDescriptor btreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
                 storageManager, lcManagerProvider, btreeSplitProvider, secondaryTypeTraits, comparatorFactories, null,
-                fieldPermutation, 0.7f, false, 1000L, dataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
+                fieldPermutation, 0.7f, false, 1000L, true, dataflowHelperFactory,
+                NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, btreeBulkLoad, splitNCs);
 
         // connect the ops
diff --git a/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml b/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml
index 3d701ce..85eadf1 100644
--- a/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml
+++ b/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml
@@ -20,32 +20,32 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>btree-example</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-data-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   	</dependency>
   </dependencies>
   <build>
diff --git a/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/DataGenOperatorDescriptor.java b/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/DataGenOperatorDescriptor.java
index 4ac68e7..ed4cf0c 100644
--- a/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/DataGenOperatorDescriptor.java
+++ b/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/DataGenOperatorDescriptor.java
@@ -59,7 +59,7 @@
 
     @Override
     public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
-            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
+            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException {
 
         final ByteBuffer outputFrame = ctx.allocateFrame();
         final FrameTupleAppender appender = new FrameTupleAppender(ctx.getFrameSize());
diff --git a/hyracks/hyracks-examples/btree-example/btreeserver/pom.xml b/hyracks/hyracks-examples/btree-example/btreeserver/pom.xml
index fef46d8..3d3dc73 100644
--- a/hyracks/hyracks-examples/btree-example/btreeserver/pom.xml
+++ b/hyracks/hyracks-examples/btree-example/btreeserver/pom.xml
@@ -16,13 +16,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks.examples.btree</groupId>
   <artifactId>btreeserver</artifactId>
-  <version>0.2.7-SNAPSHOT</version>
+  <version>0.2.10-SNAPSHOT</version>
   <name>btreeserver</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>btree-example</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -77,20 +77,20 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks.examples.btree</groupId>
   		<artifactId>btreehelper</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-cc</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-nc</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-examples/btree-example/pom.xml b/hyracks/hyracks-examples/btree-example/pom.xml
index dc3293d..dcab262 100644
--- a/hyracks/hyracks-examples/btree-example/pom.xml
+++ b/hyracks/hyracks-examples/btree-example/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-examples</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatclient/pom.xml b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatclient/pom.xml
index f18d6bf..b5dd798 100644
--- a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatclient/pom.xml
+++ b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatclient/pom.xml
@@ -21,20 +21,20 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>hadoop-compat-example</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks.examples.compat</groupId>
   		<artifactId>hadoopcompathelper</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-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 fb595fd..2b703b2 100644
--- a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompathelper/pom.xml
+++ b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompathelper/pom.xml
@@ -21,20 +21,20 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>hadoop-compat-example</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   </dependencies>
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/pom.xml b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/pom.xml
index d2062d3..ba30424 100644
--- a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/pom.xml
+++ b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatserver/pom.xml
@@ -16,13 +16,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks.examples.compat</groupId>
   <artifactId>hadoopcompatserver</artifactId>
-  <version>0.2.7-SNAPSHOT</version>
+  <version>0.2.10-SNAPSHOT</version>
   <name>hadoopcompatserver</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>hadoop-compat-example</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -74,7 +74,7 @@
       <plugin>
       	<groupId>edu.uci.ics.hyracks</groupId>
       	<artifactId>hyracks-virtualcluster-maven-plugin</artifactId>
-      	<version>0.2.7-SNAPSHOT</version>
+      	<version>0.2.10-SNAPSHOT</version>
         <configuration>
           <hyracksServerHome>${basedir}/target/hadoopcompatserver-${project.version}-binary-assembly</hyracksServerHome>
           <jvmOptions>${jvm.extraargs}</jvmOptions>
@@ -149,27 +149,27 @@
      <dependency>
         <groupId>edu.uci.ics.hyracks.examples.compat</groupId>
         <artifactId>hadoopcompathelper</artifactId>
-        <version>0.2.7-SNAPSHOT</version>
+        <version>0.2.10-SNAPSHOT</version>
         <scope>compile</scope>
      </dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-cc</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-nc</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
      <dependency>
         <groupId>edu.uci.ics.hyracks.examples.compat</groupId>
   	    <artifactId>hadoopcompatclient</artifactId>
-  	    <version>0.2.7-SNAPSHOT</version>
+  	    <version>0.2.10-SNAPSHOT</version>
   	    <type>jar</type>
   	    <scope>test</scope>
      </dependency>
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/pom.xml b/hyracks/hyracks-examples/hadoop-compat-example/pom.xml
index af88b09..5588134 100644
--- a/hyracks/hyracks-examples/hadoop-compat-example/pom.xml
+++ b/hyracks/hyracks-examples/hadoop-compat-example/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-examples</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <modules>
@@ -43,7 +43,7 @@
       <dependency>
          <groupId>edu.uci.ics.hyracks</groupId>
          <artifactId>hyracks-hadoop-compat</artifactId>
-         <version>0.2.7-SNAPSHOT</version>
+         <version>0.2.10-SNAPSHOT</version>
          <type>jar</type>
          <scope>compile</scope>
       </dependency>
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/pom.xml b/hyracks/hyracks-examples/hyracks-integration-tests/pom.xml
index a4fcf28..4893be4 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/pom.xml
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>hyracks-examples</artifactId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 	<build>
 		<plugins>
@@ -46,75 +46,75 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-btree</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-rtree</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-lsm-btree</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-lsm-rtree</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-lsm-invertedindex</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-test-support</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 		</dependency>
   	    <dependency>
             <groupId>edu.uci.ics.hyracks</groupId>
             <artifactId>hyracks-client</artifactId>
-            <version>0.2.7-SNAPSHOT</version>
+            <version>0.2.10-SNAPSHOT</version>
             <type>jar</type>
             <scope>compile</scope>
         </dependency>
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
index a93c199..eec7225 100644
--- 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
@@ -178,7 +178,7 @@
         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,
+                primaryBloomFilterKeyFields, fieldPermutation, 0.7f, true, 1000L, true, dataflowHelperFactory,
                 NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
 
@@ -241,7 +241,7 @@
         int[] fieldPermutation = { 3, 0 };
         TreeIndexBulkLoadOperatorDescriptor secondaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
                 storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
-                secondaryComparatorFactories, secondaryBloomFilterKeyFields, fieldPermutation, 0.7f, true, 1000L,
+                secondaryComparatorFactories, secondaryBloomFilterKeyFields, fieldPermutation, 0.7f, true, 1000L, true,
                 dataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeBulkLoad, NC1_ID);
 
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
index 8bb698a..1bd22d7 100644
--- 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
@@ -203,8 +203,8 @@
         int[] fieldPermutation = { 0, 1 };
         TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
                 storageManager, lcManagerProvider, primaryFileSplitProvider, primaryTypeTraits,
-                primaryComparatorFactories, null, fieldPermutation, 0.7f, true, 1000L, btreeDataflowHelperFactory,
-                NoOpOperationCallbackFactory.INSTANCE);
+                primaryComparatorFactories, null, fieldPermutation, 0.7f, true, 1000L, true,
+                btreeDataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
         return primaryBtreeBulkLoad;
     }
@@ -277,7 +277,7 @@
 
     private IOperatorDescriptor createInvertedIndexBulkLoadOp(JobSpecification spec, int[] fieldPermutation) {
         LSMInvertedIndexBulkLoadOperatorDescriptor invIndexBulkLoadOp = new LSMInvertedIndexBulkLoadOperatorDescriptor(
-                spec, fieldPermutation, true, 1000L, storageManager, btreeFileSplitProvider, lcManagerProvider,
+                spec, fieldPermutation, true, 1000L, true, storageManager, btreeFileSplitProvider, lcManagerProvider,
                 tokenTypeTraits, tokenComparatorFactories, invListsTypeTraits, invListsComparatorFactories,
                 tokenizerFactory, invertedIndexDataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, invIndexBulkLoadOp, NC1_ID);
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
index 00296a5..d1c682c 100644
--- 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
@@ -223,7 +223,7 @@
         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,
+                null, fieldPermutation, 0.7f, false, 1000L, true, btreeDataflowHelperFactory,
                 NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBulkLoad, NC1_ID);
 
@@ -280,8 +280,8 @@
         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);
+                secondaryComparatorFactories, null, fieldPermutation, 0.7f, false, 1000L, true,
+                rtreeDataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBulkLoad, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primarySearchOp, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/comm/SerializationDeserializationTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/comm/SerializationDeserializationTest.java
index c6efca4..29be04b 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/comm/SerializationDeserializationTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/comm/SerializationDeserializationTest.java
@@ -56,7 +56,7 @@
             buffers = new ArrayList<ByteBuffer>();
         }
 
-        public IOpenableDataWriter<Object[]> createWriter() {
+        public IOpenableDataWriter<Object[]> createWriter() throws HyracksDataException {
             return new SerializingDataWriter(ctx, rDes, new IFrameWriter() {
                 @Override
                 public void open() throws HyracksDataException {
@@ -79,7 +79,7 @@
             });
         }
 
-        public IOpenableDataReader<Object[]> createDataReader() {
+        public IOpenableDataReader<Object[]> createDataReader() throws HyracksDataException {
             return new FrameDeserializingDataReader(ctx, new IFrameReader() {
                 private int i;
 
diff --git a/hyracks/hyracks-examples/pom.xml b/hyracks/hyracks-examples/pom.xml
index 6296f5e..08f4a90 100644
--- a/hyracks/hyracks-examples/pom.xml
+++ b/hyracks/hyracks-examples/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-examples/text-example/pom.xml b/hyracks/hyracks-examples/text-example/pom.xml
index 2359f96..ed9924a 100644
--- a/hyracks/hyracks-examples/text-example/pom.xml
+++ b/hyracks/hyracks-examples/text-example/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-examples</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-examples/text-example/textclient/pom.xml b/hyracks/hyracks-examples/text-example/textclient/pom.xml
index 0cd3d6c..6923241 100644
--- a/hyracks/hyracks-examples/text-example/textclient/pom.xml
+++ b/hyracks/hyracks-examples/text-example/textclient/pom.xml
@@ -20,20 +20,20 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>text-example</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>texthelper</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-examples/text-example/texthelper/pom.xml b/hyracks/hyracks-examples/text-example/texthelper/pom.xml
index e02138f..0c708a1 100644
--- a/hyracks/hyracks-examples/text-example/texthelper/pom.xml
+++ b/hyracks/hyracks-examples/text-example/texthelper/pom.xml
@@ -20,26 +20,26 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>text-example</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-data-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   	</dependency>
   </dependencies>
   <build>
diff --git a/hyracks/hyracks-examples/text-example/textserver/pom.xml b/hyracks/hyracks-examples/text-example/textserver/pom.xml
index aad72bd..b12f823 100644
--- a/hyracks/hyracks-examples/text-example/textserver/pom.xml
+++ b/hyracks/hyracks-examples/text-example/textserver/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>text-example</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -73,7 +73,7 @@
       <plugin>
       	<groupId>edu.uci.ics.hyracks</groupId>
       	<artifactId>hyracks-virtualcluster-maven-plugin</artifactId>
-      	<version>0.2.7-SNAPSHOT</version>
+      	<version>0.2.10-SNAPSHOT</version>
         <configuration>
           <hyracksServerHome>${basedir}/target/textserver-${project.version}-binary-assembly</hyracksServerHome>
           <jvmOptions>${jvm.extraargs}</jvmOptions>
@@ -148,27 +148,27 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>texthelper</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-cc</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-nc</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>textclient</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>test</scope>
   	</dependency>
diff --git a/hyracks/hyracks-examples/tpch-example/pom.xml b/hyracks/hyracks-examples/tpch-example/pom.xml
index 129e38f..1b5f2b5 100644
--- a/hyracks/hyracks-examples/tpch-example/pom.xml
+++ b/hyracks/hyracks-examples/tpch-example/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-examples</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-examples/tpch-example/tpchclient/pom.xml b/hyracks/hyracks-examples/tpch-example/tpchclient/pom.xml
index 1123fe4..a872ecd 100644
--- a/hyracks/hyracks-examples/tpch-example/tpchclient/pom.xml
+++ b/hyracks/hyracks-examples/tpch-example/tpchclient/pom.xml
@@ -19,20 +19,20 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>tpch-example</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-data-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   	</dependency>
   </dependencies>
   <build>
diff --git a/hyracks/hyracks-examples/tpch-example/tpchserver/pom.xml b/hyracks/hyracks-examples/tpch-example/tpchserver/pom.xml
index d58f28c..712ba4c 100644
--- a/hyracks/hyracks-examples/tpch-example/tpchserver/pom.xml
+++ b/hyracks/hyracks-examples/tpch-example/tpchserver/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>tpch-example</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -76,25 +76,25 @@
     <dependency>
         <groupId>edu.uci.ics.hyracks</groupId>
         <artifactId>hyracks-dataflow-std</artifactId>
-        <version>0.2.7-SNAPSHOT</version>
+        <version>0.2.10-SNAPSHOT</version>
         <scope>compile</scope>
     </dependency>
     <dependency>
     	<groupId>edu.uci.ics.hyracks</groupId>
     	<artifactId>hyracks-data-std</artifactId>
-    	<version>0.2.7-SNAPSHOT</version>
+    	<version>0.2.10-SNAPSHOT</version>
     </dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-cc</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-nc</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-hadoop-compat/pom.xml b/hyracks/hyracks-hadoop-compat/pom.xml
index 0a34b34..f6cfb71 100644
--- a/hyracks/hyracks-hadoop-compat/pom.xml
+++ b/hyracks/hyracks-hadoop-compat/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -94,7 +94,7 @@
     <dependency>
     	<groupId>edu.uci.ics.hyracks</groupId>
     	<artifactId>hyracks-dataflow-hadoop</artifactId>
-    	<version>0.2.7-SNAPSHOT</version>
+    	<version>0.2.10-SNAPSHOT</version>
     	<type>jar</type>
     	<scope>compile</scope>
     </dependency>
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 b7a8676..b93365d 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-0.20.2/pom.xml
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-0.20.2/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<artifactId>hyracks-hdfs</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -112,7 +112,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-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 34400b6..7cd1091 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-0.23.1/pom.xml
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-0.23.1/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<artifactId>hyracks-hdfs</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 	<build>
 		<plugins>
@@ -216,7 +216,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-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 b8453dd..032d50d 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/pom.xml
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<artifactId>hyracks-hdfs</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -192,31 +192,31 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/lib/TextKeyValueParserFactory.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/lib/TextKeyValueParserFactory.java
index 71a7680..fbac95b 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/lib/TextKeyValueParserFactory.java
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/lib/TextKeyValueParserFactory.java
@@ -33,7 +33,8 @@
     private static final long serialVersionUID = 1L;
 
     @Override
-    public IKeyValueParser<LongWritable, Text> createKeyValueParser(final IHyracksTaskContext ctx) {
+    public IKeyValueParser<LongWritable, Text> createKeyValueParser(final IHyracksTaskContext ctx)
+            throws HyracksDataException {
 
         final ArrayTupleBuilder tb = new ArrayTupleBuilder(1);
         final ByteBuffer buffer = ctx.allocateFrame();
diff --git a/hyracks/hyracks-hdfs/pom.xml b/hyracks/hyracks-hdfs/pom.xml
index 0035285..b174d37 100644
--- a/hyracks/hyracks-hdfs/pom.xml
+++ b/hyracks/hyracks-hdfs/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-ipc/pom.xml b/hyracks/hyracks-ipc/pom.xml
index 88bb49c..fed59e6 100644
--- a/hyracks/hyracks-ipc/pom.xml
+++ b/hyracks/hyracks-ipc/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
diff --git a/hyracks/hyracks-ipc/src/main/java/edu/uci/ics/hyracks/ipc/impl/IPCConnectionManager.java b/hyracks/hyracks-ipc/src/main/java/edu/uci/ics/hyracks/ipc/impl/IPCConnectionManager.java
index c52dbd8..81294c2 100644
--- a/hyracks/hyracks-ipc/src/main/java/edu/uci/ics/hyracks/ipc/impl/IPCConnectionManager.java
+++ b/hyracks/hyracks-ipc/src/main/java/edu/uci/ics/hyracks/ipc/impl/IPCConnectionManager.java
@@ -17,6 +17,7 @@
 import java.io.IOException;
 import java.net.InetSocketAddress;
 import java.net.ServerSocket;
+import java.net.StandardSocketOptions;
 import java.nio.ByteBuffer;
 import java.nio.channels.ClosedChannelException;
 import java.nio.channels.SelectableChannel;
@@ -175,6 +176,7 @@
                     if (!workingPendingConnections.isEmpty()) {
                         for (IPCHandle handle : workingPendingConnections) {
                             SocketChannel channel = SocketChannel.open();
+                            channel.setOption(StandardSocketOptions.TCP_NODELAY, true);
                             channel.configureBlocking(false);
                             SelectionKey cKey = null;
                             if (channel.connect(handle.getRemoteAddress())) {
@@ -267,6 +269,7 @@
                             } else if (key.isAcceptable()) {
                                 assert sc == serverSocketChannel;
                                 SocketChannel channel = serverSocketChannel.accept();
+                                channel.setOption(StandardSocketOptions.TCP_NODELAY, true);
                                 channel.configureBlocking(false);
                                 IPCHandle handle = new IPCHandle(system, null);
                                 SelectionKey cKey = channel.register(selector, SelectionKey.OP_READ);
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 df11910..5ffbf28 100644
--- a/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/pom.xml
+++ b/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-maven-plugins</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
diff --git a/hyracks/hyracks-maven-plugins/pom.xml b/hyracks/hyracks-maven-plugins/pom.xml
index 6d8a2ec..a2b8d03 100644
--- a/hyracks/hyracks-maven-plugins/pom.xml
+++ b/hyracks/hyracks-maven-plugins/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <dependencies>
diff --git a/hyracks/hyracks-net/pom.xml b/hyracks/hyracks-net/pom.xml
index e5853b7..a188f4c 100644
--- a/hyracks/hyracks-net/pom.xml
+++ b/hyracks/hyracks-net/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
diff --git a/hyracks/hyracks-net/src/main/java/edu/uci/ics/hyracks/net/protocols/tcp/TCPEndpoint.java b/hyracks/hyracks-net/src/main/java/edu/uci/ics/hyracks/net/protocols/tcp/TCPEndpoint.java
index 932d71a..067898f 100644
--- a/hyracks/hyracks-net/src/main/java/edu/uci/ics/hyracks/net/protocols/tcp/TCPEndpoint.java
+++ b/hyracks/hyracks-net/src/main/java/edu/uci/ics/hyracks/net/protocols/tcp/TCPEndpoint.java
@@ -17,6 +17,7 @@
 import java.io.IOException;
 import java.net.InetSocketAddress;
 import java.net.ServerSocket;
+import java.net.StandardSocketOptions;
 import java.nio.channels.SelectableChannel;
 import java.nio.channels.SelectionKey;
 import java.nio.channels.Selector;
@@ -118,6 +119,7 @@
                     if (!workingPendingConnections.isEmpty()) {
                         for (InetSocketAddress address : workingPendingConnections) {
                             SocketChannel channel = SocketChannel.open();
+                            channel.setOption(StandardSocketOptions.TCP_NODELAY, true);
                             channel.configureBlocking(false);
                             boolean connect = false;
                             boolean failure = false;
@@ -143,6 +145,7 @@
                     }
                     if (!workingIncomingConnections.isEmpty()) {
                         for (SocketChannel channel : workingIncomingConnections) {
+                            channel.setOption(StandardSocketOptions.TCP_NODELAY, true);
                             channel.configureBlocking(false);
                             SelectionKey sKey = channel.register(selector, 0);
                             TCPConnection connection = new TCPConnection(TCPEndpoint.this, channel, sKey, selector);
diff --git a/hyracks/hyracks-server/pom.xml b/hyracks/hyracks-server/pom.xml
index 646880d..f691481 100644
--- a/hyracks/hyracks-server/pom.xml
+++ b/hyracks/hyracks-server/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -88,14 +88,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-cc</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-nc</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-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
index 7d9a92e..a712ab4 100644
--- a/hyracks/hyracks-storage-am-bloomfilter/pom.xml
+++ b/hyracks/hyracks-storage-am-bloomfilter/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -39,7 +39,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
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
index 0e796b0..6811e1b 100644
--- 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
@@ -209,15 +209,15 @@
                 throw new HyracksDataException("Failed to create the bloom filter builder since it is not activated.");
             }
 
-            this.numElements = numElements;
+            this.numElements = numElements == 0 ? 1 : numElements;
             this.numHashes = numHashes;
-            numBits = numElements * numBitsPerElement;
+            numBits = this.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) {
+            if (this.numElements > 0) {
                 persistBloomFilterMetaData();
                 readBloomFilterMetaData();
                 int currentPageId = 1;
diff --git a/hyracks/hyracks-storage-am-btree/pom.xml b/hyracks/hyracks-storage-am-btree/pom.xml
index 4878a44..2746666 100644
--- a/hyracks/hyracks-storage-am-btree/pom.xml
+++ b/hyracks/hyracks-storage-am-btree/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -41,28 +41,28 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
         <dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-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/impls/BTree.java b/hyracks/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTree.java
index 7c29fc9..689843b 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
@@ -934,8 +934,8 @@
     }
 
     @Override
-    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
-            throws TreeIndexException {
+    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint,
+            boolean checkIfEmptyIndex) throws TreeIndexException {
         try {
             return new BTreeBulkLoader(fillFactor, verifyInput);
         } catch (HyracksDataException e) {
@@ -1025,7 +1025,8 @@
                 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.");
+                throw new UnsortedInputException(
+                        "Input stream given to BTree bulk load is not sorted or has duplicates.");
             }
         }
 
diff --git a/hyracks/hyracks-storage-am-common/pom.xml b/hyracks/hyracks-storage-am-common/pom.xml
index 33bbe5e..309f183 100644
--- a/hyracks/hyracks-storage-am-common/pom.xml
+++ b/hyracks/hyracks-storage-am-common/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -41,28 +41,28 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-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/IIndex.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IIndex.java
index 074ae7c..4006cb7 100644
--- 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
@@ -91,9 +91,10 @@
      *            the callback to be used for modification operations
      * @param searchCallback
      *            the callback to be used for search operations
+     * @throws HyracksDataException
      */
     public IIndexAccessor createAccessor(IModificationOperationCallback modificationCallback,
-            ISearchOperationCallback searchCallback);
+            ISearchOperationCallback searchCallback) throws HyracksDataException;
 
     /**
      * Ensures that all pages (and tuples) of the index are logically consistent.
@@ -119,6 +120,6 @@
      * @param verifyInput
      * @throws IndexException
      */
-    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
-            throws IndexException;
+    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint,
+            boolean checkIfEmptyIndex) throws IndexException;
 }
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
index 31fc627..974d91c 100644
--- 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
@@ -14,11 +14,12 @@
  */
 package edu.uci.ics.hyracks.storage.am.common.api;
 
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 
 public interface IIndexOperationContext {
-    void setOperation(IndexOperation newOp);
-    
+    void setOperation(IndexOperation newOp) throws HyracksDataException;
+
     IndexOperation getOperation();
 
     void reset();
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
index 0504a94..a0f9d8e 100644
--- 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
@@ -34,6 +34,7 @@
     private final float fillFactor;
     private final boolean verifyInput;
     private final long numElementsHint;
+    private final boolean checkIfEmptyIndex;
     private final IIndexDataflowHelper indexHelper;
     private FrameTupleAccessor accessor;
     private IIndex index;
@@ -43,13 +44,14 @@
 
     public IndexBulkLoadOperatorNodePushable(IIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx, int partition,
             int[] fieldPermutation, float fillFactor, boolean verifyInput, long numElementsHint,
-            IRecordDescriptorProvider recordDescProvider) {
+            boolean checkIfEmptyIndex, 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.checkIfEmptyIndex = checkIfEmptyIndex;
         this.recDescProvider = recordDescProvider;
         tuple.setFieldPermutation(fieldPermutation);
     }
@@ -61,7 +63,7 @@
         indexHelper.open();
         index = indexHelper.getIndexInstance();
         try {
-            bulkLoader = index.createBulkLoader(fillFactor, verifyInput, numElementsHint);
+            bulkLoader = index.createBulkLoader(fillFactor, verifyInput, numElementsHint, checkIfEmptyIndex);
         } catch (Exception e) {
             indexHelper.close();
             throw new HyracksDataException(e);
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 8c2d847..5e07e0c 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
@@ -75,7 +75,7 @@
             // 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(), ioDeviceId);
+                localResourceRepository.deleteResourceByName(file.getFile().getPath());
             }
             index.create();
             try {
@@ -83,9 +83,8 @@
                 resourceID = resourceIdFactory.createId();
                 ILocalResourceFactory localResourceFactory = opDesc.getLocalResourceFactoryProvider()
                         .getLocalResourceFactory();
-                localResourceRepository.insert(
-                        localResourceFactory.createLocalResource(resourceID, file.getFile().getPath(), partition),
-                        ioDeviceId);
+                localResourceRepository.insert(localResourceFactory.createLocalResource(resourceID, file.getFile()
+                        .getPath(), partition));
             } catch (IOException e) {
                 throw new HyracksDataException(e);
             }
@@ -127,7 +126,7 @@
             }
 
             if (resourceID != -1) {
-                localResourceRepository.deleteResourceByName(file.getFile().getPath(), ioDeviceId);
+                localResourceRepository.deleteResourceByName(file.getFile().getPath());
             }
             index.destroy();
         }
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 09cdd68..a58e9e8 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
@@ -36,12 +36,13 @@
     private final float fillFactor;
     private final boolean verifyInput;
     private final long numElementsHint;
+    private final boolean checkIfEmptyIndex;
 
     public TreeIndexBulkLoadOperatorDescriptor(IOperatorDescriptorRegistry spec,
             IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lifecycleManagerProvider,
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, int[] bloomFilterKeyFields, int[] fieldPermutation,
-            float fillFactor, boolean verifyInput, long numElementsHint,
+            float fillFactor, boolean verifyInput, long numElementsHint, boolean checkIfEmptyIndex,
             IIndexDataflowHelperFactory dataflowHelperFactory,
             IModificationOperationCallbackFactory modificationOpCallbackFactory) {
         super(spec, 1, 0, null, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
@@ -52,12 +53,13 @@
         this.fillFactor = fillFactor;
         this.verifyInput = verifyInput;
         this.numElementsHint = numElementsHint;
+        this.checkIfEmptyIndex = checkIfEmptyIndex;
     }
 
     @Override
     public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
             IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
         return new IndexBulkLoadOperatorNodePushable(this, ctx, partition, fieldPermutation, fillFactor, verifyInput,
-                numElementsHint, recordDescProvider);
+                numElementsHint, checkIfEmptyIndex, 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/impls/AbstractTreeIndex.java b/hyracks/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/AbstractTreeIndex.java
index b573a32..19d40a0 100644
--- 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
@@ -333,8 +333,12 @@
     }
 
     public class TreeIndexInsertBulkLoader implements IIndexBulkLoader {
-        ITreeIndexAccessor accessor = (ITreeIndexAccessor) createAccessor(NoOpOperationCallback.INSTANCE,
-                NoOpOperationCallback.INSTANCE);
+        ITreeIndexAccessor accessor;
+
+        public TreeIndexInsertBulkLoader() throws HyracksDataException {
+            accessor = (ITreeIndexAccessor) createAccessor(NoOpOperationCallback.INSTANCE,
+                    NoOpOperationCallback.INSTANCE);
+        }
 
         @Override
         public void add(ITupleReference tuple) throws HyracksDataException {
@@ -356,4 +360,4 @@
     public long getMemoryAllocationSize() {
         return 0;
     }
-}
+}
diff --git a/hyracks/hyracks-storage-am-lsm-btree/pom.xml b/hyracks/hyracks-storage-am-lsm-btree/pom.xml
index 158443d..d18210e 100644
--- a/hyracks/hyracks-storage-am-lsm-btree/pom.xml
+++ b/hyracks/hyracks-storage-am-lsm-btree/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -39,21 +39,21 @@
     <dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency> 
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-bloomfilter</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency> 
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-lsm-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
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
index d34906e..f217419 100644
--- 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
@@ -49,11 +49,10 @@
     @Override
     public ITreeIndex createIndexInstance() throws HyracksDataException {
         AbstractTreeIndexOperatorDescriptor treeOpDesc = (AbstractTreeIndexOperatorDescriptor) opDesc;
-        return LSMBTreeUtils.createLSMTree(virtualBufferCache, ctx.getIOManager(), file, opDesc.getStorageManager()
-                .getBufferCache(ctx), opDesc.getStorageManager().getFileMapProvider(ctx), treeOpDesc
-                .getTreeIndexTypeTraits(), treeOpDesc.getTreeIndexComparatorFactories(), treeOpDesc
-                .getTreeIndexBloomFilterKeyFields(), bloomFilterFalsePositiveRate, mergePolicy, opTrackerFactory
-                .getOperationTracker(ctx), ioScheduler, ioOpCallbackProvider, opDesc.getFileSplitProvider()
-                .getFileSplits()[partition].getIODeviceId());
+        return LSMBTreeUtils.createLSMTree(virtualBufferCache, file, opDesc.getStorageManager().getBufferCache(ctx),
+                opDesc.getStorageManager().getFileMapProvider(ctx), treeOpDesc.getTreeIndexTypeTraits(),
+                treeOpDesc.getTreeIndexComparatorFactories(), treeOpDesc.getTreeIndexBloomFilterKeyFields(),
+                bloomFilterFalsePositiveRate, mergePolicy, opTrackerFactory.getOperationTracker(ctx), ioScheduler,
+                ioOpCallbackProvider);
     }
 }
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
index 8161200..3557d73 100644
--- 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
@@ -211,6 +211,7 @@
 
         List<ILSMComponent> immutableComponents = componentsRef.get();
         mutableComponent.getBTree().clear();
+        mutableComponent.reset();
         for (ILSMComponent c : immutableComponents) {
             LSMBTreeImmutableComponent component = (LSMBTreeImmutableComponent) c;
             component.getBloomFilter().deactivate();
@@ -369,7 +370,7 @@
 
         LSMBTreeImmutableComponent component = createDiskComponent(componentFactory, flushOp.getBTreeFlushTarget(),
                 flushOp.getBloomFilterFlushTarget(), true);
-        IIndexBulkLoader bulkLoader = component.getBTree().createBulkLoader(1.0f, false, numElements);
+        IIndexBulkLoader bulkLoader = component.getBTree().createBulkLoader(1.0f, false, numElements, false);
         IIndexBulkLoader builder = component.getBloomFilter().createBuilder(numElements,
                 bloomFilterSpec.getNumHashes(), bloomFilterSpec.getNumBucketsPerElements());
 
@@ -429,7 +430,7 @@
         LSMBTreeImmutableComponent mergedComponent = createDiskComponent(componentFactory,
                 mergeOp.getBTreeMergeTarget(), mergeOp.getBloomFilterMergeTarget(), true);
 
-        IIndexBulkLoader bulkLoader = mergedComponent.getBTree().createBulkLoader(1.0f, false, numElements);
+        IIndexBulkLoader bulkLoader = mergedComponent.getBTree().createBulkLoader(1.0f, false, numElements, false);
         IIndexBulkLoader builder = mergedComponent.getBloomFilter().createBuilder(numElements,
                 bloomFilterSpec.getNumHashes(), bloomFilterSpec.getNumBucketsPerElements());
         try {
@@ -464,10 +465,10 @@
     }
 
     @Override
-    public IIndexBulkLoader createBulkLoader(float fillLevel, boolean verifyInput, long numElementsHint)
-            throws TreeIndexException {
+    public IIndexBulkLoader createBulkLoader(float fillLevel, boolean verifyInput, long numElementsHint,
+            boolean checkIfEmptyIndex) throws TreeIndexException {
         try {
-            return new LSMBTreeBulkLoader(fillLevel, verifyInput, numElementsHint);
+            return new LSMBTreeBulkLoader(fillLevel, verifyInput, numElementsHint, checkIfEmptyIndex);
         } catch (HyracksDataException e) {
             throw new TreeIndexException(e);
         }
@@ -498,19 +499,22 @@
         private final ILSMComponent component;
         private final BTreeBulkLoader bulkLoader;
         private final IIndexBulkLoader builder;
-        private boolean endHasBeenCalled = false;
+        private boolean cleanedUpArtifacts = false;
+        private boolean isEmptyComponent = true;
+        private boolean endedBloomFilterLoad = false;
 
-        public LSMBTreeBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
+        public LSMBTreeBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint, boolean checkIfEmptyIndex)
                 throws TreeIndexException, HyracksDataException {
+            if (checkIfEmptyIndex && !isEmptyIndex()) {
+                throw new TreeIndexException("Cannot load an index that is not empty");
+            }
             try {
                 component = createBulkLoadTarget();
-            } catch (HyracksDataException e) {
-                throw new TreeIndexException(e);
-            } catch (IndexException e) {
+            } catch (HyracksDataException | IndexException e) {
                 throw new TreeIndexException(e);
             }
             bulkLoader = (BTreeBulkLoader) ((LSMBTreeImmutableComponent) component).getBTree().createBulkLoader(
-                    fillFactor, verifyInput, numElementsHint);
+                    fillFactor, verifyInput, numElementsHint, false);
 
             int maxBucketsPerElement = BloomCalculations.maxBucketsPerElement(numElementsHint);
             BloomFilterSpecification bloomFilterSpec = BloomCalculations.computeBloomSpec(maxBucketsPerElement,
@@ -524,36 +528,45 @@
             try {
                 bulkLoader.add(tuple);
                 builder.add(tuple);
-            } catch (IndexException e) {
-                handleException();
+            } catch (IndexException | HyracksDataException | RuntimeException e) {
+                cleanupArtifacts();
                 throw e;
-            } catch (HyracksDataException e) {
-                handleException();
-                throw e;
-            } catch (RuntimeException e) {
-                handleException();
-                throw e;
+            }
+            if (isEmptyComponent) {
+                isEmptyComponent = false;
             }
         }
 
-        protected void handleException() throws HyracksDataException, IndexException {
-            if (!endHasBeenCalled) {
-                builder.end();
+        protected void cleanupArtifacts() throws HyracksDataException, IndexException {
+            if (!cleanedUpArtifacts) {
+                cleanedUpArtifacts = true;
+                // We make sure to end the bloom filter load to release latches.
+                if (!endedBloomFilterLoad) {
+                    builder.end();
+                    endedBloomFilterLoad = true;
+                }
+                ((LSMBTreeImmutableComponent) component).getBTree().deactivate();
+                ((LSMBTreeImmutableComponent) component).getBTree().destroy();
+                ((LSMBTreeImmutableComponent) component).getBloomFilter().deactivate();
+                ((LSMBTreeImmutableComponent) component).getBloomFilter().destroy();
             }
-            ((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);
+            if (!cleanedUpArtifacts) {
+                if (!endedBloomFilterLoad) {
+                    builder.end();
+                    endedBloomFilterLoad = true;
+                }
+                bulkLoader.end();
+                if (isEmptyComponent) {
+                    cleanupArtifacts();
+                } else {
+                    lsmHarness.addBulkLoadedComponent(component);
+                }
+            }
         }
-
     }
 
     public LSMBTreeOpContext createOpContext(IModificationOperationCallback modificationCallback,
@@ -630,10 +643,7 @@
     }
 
     public boolean isEmptyIndex() throws HyracksDataException {
-        List<ILSMComponent> immutableComponents = componentsRef.get();
-        return immutableComponents.isEmpty()
-                && mutableComponent.getBTree().isEmptyTree(
-                        mutableComponent.getBTree().getInteriorFrameFactory().createFrame());
+        return componentsRef.get().isEmpty() && !mutableComponent.isModified();
     }
 
     @Override
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
index b71e9be..7e8fbb3 100644
--- 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
@@ -26,7 +26,6 @@
 
 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.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
 import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractLSMIndexFileManager;
@@ -39,9 +38,9 @@
 
     private final TreeIndexFactory<? extends ITreeIndex> btreeFactory;
 
-    public LSMBTreeFileManager(IIOManager ioManager, IFileMapProvider fileMapProvider, FileReference file,
-            TreeIndexFactory<? extends ITreeIndex> btreeFactory, int ioDeviceId) {
-        super(ioManager, fileMapProvider, file, null, ioDeviceId);
+    public LSMBTreeFileManager(IFileMapProvider fileMapProvider, FileReference file,
+            TreeIndexFactory<? extends ITreeIndex> btreeFactory) {
+        super(fileMapProvider, file, null);
         this.btreeFactory = btreeFactory;
     }
 
@@ -79,16 +78,16 @@
         ArrayList<ComparableFileName> allBTreeFiles = new ArrayList<ComparableFileName>();
         ArrayList<ComparableFileName> allBloomFilterFiles = new ArrayList<ComparableFileName>();
 
-        // Gather files from the IODeviceHandle.
+        // Gather files
 
         // List of valid BTree files.
-        cleanupAndGetValidFilesInternal(dev, btreeFilter, btreeFactory, allBTreeFiles);
+        cleanupAndGetValidFilesInternal(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);
+        validateFiles(btreeFilesSet, allBloomFilterFiles, bloomFilterFilter, null);
 
         // Sanity check.
         if (allBTreeFiles.size() != allBloomFilterFiles.size()) {
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
index 6a94150..ac62d9f 100644
--- 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
@@ -52,13 +52,12 @@
             ISearchOperationCallback searchCallback, int numBloomFilterKeyFields) {
         IBinaryComparatorFactory cmpFactories[] = memBTree.getComparatorFactories();
         if (cmpFactories[0] != null) {
-            this.cmp = MultiComparator.createIgnoreFieldLength(memBTree.getComparatorFactories());
+            this.cmp = MultiComparator.create(memBTree.getComparatorFactories());
         } else {
             this.cmp = null;
         }
 
-        bloomFilterCmp = MultiComparator.createIgnoreFieldLength(memBTree.getComparatorFactories(), 0,
-                numBloomFilterKeyFields);
+        bloomFilterCmp = MultiComparator.create(memBTree.getComparatorFactories(), 0, numBloomFilterKeyFields);
 
         this.memBTree = memBTree;
         this.insertLeafFrameFactory = insertLeafFrameFactory;
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
index 28bcb45..507ec02 100644
--- 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
@@ -18,7 +18,6 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.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;
@@ -44,22 +43,11 @@
 import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
 public class LSMBTreeUtils {
-
-    public static LSMBTree createLSMTree(IVirtualBufferCache virtualBufferCache, IIOManager ioManager,
-            FileReference file, IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider,
-            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories, int[] bloomFilterKeyFields,
-            double bloomFilterFalsePositiveRate, ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker,
-            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
-        return createLSMTree(virtualBufferCache, ioManager, file, diskBufferCache, diskFileMapProvider, typeTraits,
-                cmpFactories, bloomFilterKeyFields, bloomFilterFalsePositiveRate, mergePolicy, opTracker, ioScheduler,
-                ioOpCallbackProvider, 0);
-    }
-
-    public static LSMBTree createLSMTree(IVirtualBufferCache virtualBufferCache, IIOManager ioManager,
-            FileReference file, IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider,
-            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories, int[] bloomFilterKeyFields,
-            double bloomFilterFalsePositiveRate, ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker,
-            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider, int ioDeviceId) {
+    public static LSMBTree createLSMTree(IVirtualBufferCache virtualBufferCache, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] cmpFactories, int[] bloomFilterKeyFields, double bloomFilterFalsePositiveRate,
+            ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker, ILSMIOOperationScheduler ioScheduler,
+            ILSMIOOperationCallbackProvider ioOpCallbackProvider) {
         LSMBTreeTupleWriterFactory insertTupleWriterFactory = new LSMBTreeTupleWriterFactory(typeTraits,
                 cmpFactories.length, false);
         LSMBTreeTupleWriterFactory deleteTupleWriterFactory = new LSMBTreeTupleWriterFactory(typeTraits,
@@ -83,8 +71,7 @@
         BloomFilterFactory bloomFilterFactory = new BloomFilterFactory(diskBufferCache, diskFileMapProvider,
                 bloomFilterKeyFields);
 
-        ILSMIndexFileManager fileNameManager = new LSMBTreeFileManager(ioManager, diskFileMapProvider, file,
-                diskBTreeFactory, ioDeviceId);
+        ILSMIndexFileManager fileNameManager = new LSMBTreeFileManager(diskFileMapProvider, file, diskBTreeFactory);
 
         LSMBTree lsmTree = new LSMBTree(virtualBufferCache, interiorFrameFactory, insertLeafFrameFactory,
                 deleteLeafFrameFactory, fileNameManager, diskBTreeFactory, bulkLoadBTreeFactory, bloomFilterFactory,
diff --git a/hyracks/hyracks-storage-am-lsm-common/pom.xml b/hyracks/hyracks-storage-am-lsm-common/pom.xml
index d52424b..4a6fe50 100644
--- a/hyracks/hyracks-storage-am-lsm-common/pom.xml
+++ b/hyracks/hyracks-storage-am-lsm-common/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -39,21 +39,21 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-bloomfilter</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
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
index 3f71c67..a6425ce 100644
--- 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
@@ -28,8 +28,6 @@
 
 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;
@@ -45,7 +43,6 @@
     protected static final String BLOOM_FILTER_STRING = "f";
 
     protected final IFileMapProvider fileMapProvider;
-    protected final IODeviceHandle dev;
 
     // baseDir should reflect dataset name and partition name.
     protected String baseDir;
@@ -55,15 +52,14 @@
 
     protected final TreeIndexFactory<? extends ITreeIndex> treeFactory;
 
-    public AbstractLSMIndexFileManager(IIOManager ioManager, IFileMapProvider fileMapProvider, FileReference file,
-            TreeIndexFactory<? extends ITreeIndex> treeFactory, int ioDeviceId) {
+    public AbstractLSMIndexFileManager(IFileMapProvider fileMapProvider, FileReference file,
+            TreeIndexFactory<? extends ITreeIndex> treeFactory) {
         this.baseDir = file.getFile().getPath();
         if (!baseDir.endsWith(System.getProperty("file.separator"))) {
             baseDir += System.getProperty("file.separator");
         }
         this.fileMapProvider = fileMapProvider;
         this.treeFactory = treeFactory;
-        this.dev = ioManager.getIODevices().get(ioDeviceId);
     }
 
     private static FilenameFilter fileNameFilter = new FilenameFilter() {
@@ -94,10 +90,10 @@
         }
     }
 
-    protected void cleanupAndGetValidFilesInternal(IODeviceHandle dev, FilenameFilter filter,
+    protected void cleanupAndGetValidFilesInternal(FilenameFilter filter,
             TreeIndexFactory<? extends ITreeIndex> treeFactory, ArrayList<ComparableFileName> allFiles)
             throws HyracksDataException, IndexException {
-        File dir = new File(dev.getPath(), baseDir);
+        File dir = new File(baseDir);
         String[] files = dir.list(filter);
         for (String fileName : files) {
             File file = new File(dir.getPath() + File.separator + fileName);
@@ -110,11 +106,11 @@
         }
     }
 
-    protected void validateFiles(IODeviceHandle dev, HashSet<String> groundTruth,
-            ArrayList<ComparableFileName> validFiles, FilenameFilter filter,
-            TreeIndexFactory<? extends ITreeIndex> treeFactory) throws HyracksDataException, IndexException {
+    protected void validateFiles(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);
+        cleanupAndGetValidFilesInternal(filter, treeFactory, tmpAllInvListsFiles);
         for (ComparableFileName cmpFileName : tmpAllInvListsFiles) {
             int index = cmpFileName.fileName.lastIndexOf(SPLIT_STRING);
             String file = cmpFileName.fileName.substring(0, index);
@@ -129,13 +125,13 @@
 
     @Override
     public void createDirs() {
-        File f = new File(dev.getPath(), baseDir);
+        File f = new File(baseDir);
         f.mkdirs();
     }
 
     @Override
     public void deleteDirs() {
-        File f = new File(dev.getPath(), baseDir);
+        File f = new File(baseDir);
         delete(f);
     }
 
@@ -155,7 +151,7 @@
     };
 
     protected FileReference createFlushFile(String relFlushFileName) {
-        return dev.createFileReference(relFlushFileName);
+        return new FileReference(new File(relFlushFileName));
     }
 
     protected FileReference createMergeFile(String relMergeFileName) {
@@ -185,12 +181,12 @@
         List<LSMComponentFileReferences> validFiles = new ArrayList<LSMComponentFileReferences>();
         ArrayList<ComparableFileName> allFiles = new ArrayList<ComparableFileName>();
 
-        // Gather files from the IODeviceHandle and delete invalid files
+        // Gather files 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).
-        cleanupAndGetValidFilesInternal(dev, fileNameFilter, treeFactory, allFiles);
+        cleanupAndGetValidFilesInternal(fileNameFilter, treeFactory, allFiles);
 
         if (allFiles.isEmpty()) {
             return validFiles;
diff --git a/hyracks/hyracks-storage-am-lsm-invertedindex/pom.xml b/hyracks/hyracks-storage-am-lsm-invertedindex/pom.xml
index 6fd62c1..9e5e91c 100644
--- a/hyracks/hyracks-storage-am-lsm-invertedindex/pom.xml
+++ b/hyracks/hyracks-storage-am-lsm-invertedindex/pom.xml
@@ -19,7 +19,7 @@
 	<parent>
 		<artifactId>hyracks</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
@@ -40,14 +40,14 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-btree</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-lsm-common</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 	    </dependency>
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
index 425af8d..1c4235c 100644
--- 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
@@ -38,13 +38,15 @@
     private final int[] fieldPermutation;
     private final boolean verifyInput;
     private final long numElementsHint;
+    private final boolean checkIfEmptyIndex;
 
     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,
+            boolean verifyInput, long numElementsHint, boolean checkIfEmptyIndex,
+            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,
@@ -53,12 +55,13 @@
         this.fieldPermutation = fieldPermutation;
         this.verifyInput = verifyInput;
         this.numElementsHint = numElementsHint;
+        this.checkIfEmptyIndex = checkIfEmptyIndex;
     }
 
     @Override
     public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
             IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
         return new IndexBulkLoadOperatorNodePushable(this, ctx, partition, fieldPermutation, 1.0f, verifyInput,
-                numElementsHint, recordDescProvider);
+                numElementsHint, checkIfEmptyIndex, recordDescProvider);
     }
 }
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
index 7ec7c84..1afd9d5 100644
--- 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
@@ -59,9 +59,8 @@
                     diskFileMapProvider, invIndexOpDesc.getInvListsTypeTraits(),
                     invIndexOpDesc.getInvListsComparatorFactories(), invIndexOpDesc.getTokenTypeTraits(),
                     invIndexOpDesc.getTokenComparatorFactories(), invIndexOpDesc.getTokenizerFactory(),
-                    diskBufferCache, ctx.getIOManager(), file.getFile().getPath(), bloomFilterFalsePositiveRate,
-                    mergePolicy, opTrackerFactory.getOperationTracker(ctx), ioScheduler, ioOpCallbackProvider,
-                    opDesc.getFileSplitProvider().getFileSplits()[partition].getIODeviceId());
+                    diskBufferCache, file.getFile().getPath(), bloomFilterFalsePositiveRate, mergePolicy,
+                    opTrackerFactory.getOperationTracker(ctx), ioScheduler, ioOpCallbackProvider);
             return invIndex;
         } catch (IndexException e) {
             throw new HyracksDataException(e);
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
index 4a4956f..0dbd06b 100644
--- 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
@@ -59,9 +59,8 @@
                     virtualBufferCache, diskFileMapProvider, invIndexOpDesc.getInvListsTypeTraits(),
                     invIndexOpDesc.getInvListsComparatorFactories(), invIndexOpDesc.getTokenTypeTraits(),
                     invIndexOpDesc.getTokenComparatorFactories(), invIndexOpDesc.getTokenizerFactory(),
-                    diskBufferCache, ctx.getIOManager(), file.getFile().getPath(), bloomFilterFalsePositiveRate,
-                    mergePolicy, opTrackerFactory.getOperationTracker(ctx), ioScheduler, ioOpCallbackProvider,
-                    opDesc.getFileSplitProvider().getFileSplits()[partition].getIODeviceId());
+                    diskBufferCache, file.getFile().getPath(), bloomFilterFalsePositiveRate, mergePolicy,
+                    opTrackerFactory.getOperationTracker(ctx), ioScheduler, ioOpCallbackProvider);
             return invIndex;
         } catch (IndexException e) {
             throw new HyracksDataException(e);
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
index 20d3e7f..3eae5a7 100644
--- 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
@@ -43,7 +43,6 @@
 import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
 import edu.uci.ics.hyracks.storage.am.common.api.IVirtualFreePageManager;
 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;
@@ -175,6 +174,7 @@
         List<ILSMComponent> immutableComponents = componentsRef.get();
         mutableComponent.getInvIndex().clear();
         mutableComponent.getDeletedKeysBTree().clear();
+        mutableComponent.reset();
         for (ILSMComponent c : immutableComponents) {
             LSMInvertedIndexImmutableComponent component = (LSMInvertedIndexImmutableComponent) c;
             component.getBloomFilter().deactivate();
@@ -432,7 +432,7 @@
         memBTreeAccessor.search(scanCursor, nullPred);
 
         // Bulk load the disk inverted index from the in-memory inverted index.
-        IIndexBulkLoader invIndexBulkLoader = diskInvertedIndex.createBulkLoader(1.0f, false, 0L);
+        IIndexBulkLoader invIndexBulkLoader = diskInvertedIndex.createBulkLoader(1.0f, false, 0L, false);
         try {
             while (scanCursor.hasNext()) {
                 scanCursor.next();
@@ -472,7 +472,7 @@
             deletedKeysBTreeAccessor.search(deletedKeysScanCursor, nullPred);
 
             // Bulk load the deleted-keys BTree.
-            IIndexBulkLoader deletedKeysBTreeBulkLoader = diskDeletedKeysBTree.createBulkLoader(1.0f, false, 0L);
+            IIndexBulkLoader deletedKeysBTreeBulkLoader = diskDeletedKeysBTree.createBulkLoader(1.0f, false, 0L, false);
             IIndexBulkLoader builder = component.getBloomFilter().createBuilder(numBTreeTuples,
                     bloomFilterSpec.getNumHashes(), bloomFilterSpec.getNumBucketsPerElements());
 
@@ -534,7 +534,7 @@
 
         IInvertedIndex mergedDiskInvertedIndex = component.getInvIndex();
         IIndexCursor cursor = mergeOp.getCursor();
-        IIndexBulkLoader invIndexBulkLoader = mergedDiskInvertedIndex.createBulkLoader(1.0f, true, 0L);
+        IIndexBulkLoader invIndexBulkLoader = mergedDiskInvertedIndex.createBulkLoader(1.0f, true, 0L, false);
         try {
             while (cursor.hasNext()) {
                 cursor.next();
@@ -559,63 +559,76 @@
     }
 
     @Override
-    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
-            throws IndexException {
-        return new LSMInvertedIndexBulkLoader(fillFactor, verifyInput, numElementsHint);
+    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint,
+            boolean checkIfEmptyIndex) throws IndexException {
+        try {
+            return new LSMInvertedIndexBulkLoader(fillFactor, verifyInput, numElementsHint, checkIfEmptyIndex);
+        } catch (HyracksDataException e) {
+            throw new IndexException(e);
+        }
+    }
+
+    public boolean isEmptyIndex() throws HyracksDataException {
+        return componentsRef.get().isEmpty() && !mutableComponent.isModified();
     }
 
     public class LSMInvertedIndexBulkLoader implements IIndexBulkLoader {
         private final ILSMComponent component;
         private final IIndexBulkLoader invIndexBulkLoader;
-        private boolean exceptionCaught = false;
+        private boolean cleanedUpArtifacts = false;
+        private boolean isEmptyComponent = true;
 
-        public LSMInvertedIndexBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
-                throws IndexException {
+        public LSMInvertedIndexBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint,
+                boolean checkIfEmptyIndex) throws IndexException, HyracksDataException {
+            if (checkIfEmptyIndex && !isEmptyIndex()) {
+                throw new IndexException("Cannot load an index that is not empty");
+            }
             // 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);
+            } catch (HyracksDataException | IndexException e) {
+                throw new IndexException(e);
             }
             invIndexBulkLoader = ((LSMInvertedIndexImmutableComponent) component).getInvIndex().createBulkLoader(
-                    fillFactor, verifyInput, numElementsHint);
+                    fillFactor, verifyInput, numElementsHint, false);
         }
 
         @Override
         public void add(ITupleReference tuple) throws IndexException, HyracksDataException {
             try {
                 invIndexBulkLoader.add(tuple);
-            } catch (IndexException e) {
-                handleException();
+            } catch (IndexException | HyracksDataException | RuntimeException e) {
+                cleanupArtifacts();
                 throw e;
-            } catch (HyracksDataException e) {
-                handleException();
-                throw e;
-            } catch (RuntimeException e) {
-                handleException();
-                throw e;
+            }
+            if (isEmptyComponent) {
+                isEmptyComponent = false;
             }
         }
 
-        protected void handleException() throws HyracksDataException {
-            exceptionCaught = true;
-            ((LSMInvertedIndexImmutableComponent) component).getInvIndex().deactivate();
-            ((LSMInvertedIndexImmutableComponent) component).getInvIndex().destroy();
-            ((LSMInvertedIndexImmutableComponent) component).getDeletedKeysBTree().deactivate();
-            ((LSMInvertedIndexImmutableComponent) component).getDeletedKeysBTree().destroy();
-            ((LSMInvertedIndexImmutableComponent) component).getBloomFilter().deactivate();
-            ((LSMInvertedIndexImmutableComponent) component).getBloomFilter().destroy();
+        protected void cleanupArtifacts() throws HyracksDataException {
+            if (!cleanedUpArtifacts) {
+                cleanedUpArtifacts = true;
+                ((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 {
-            if (!exceptionCaught) {
+            if (!cleanedUpArtifacts) {
                 invIndexBulkLoader.end();
+                if (isEmptyComponent) {
+                    cleanupArtifacts();
+                } else {
+                    lsmHarness.addBulkLoadedComponent(component);
+                }
             }
-            lsmHarness.addBulkLoadedComponent(component);
         }
     }
 
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
index db6c337..825e5d3 100644
--- 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
@@ -26,7 +26,6 @@
 
 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.IndexException;
 import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractLSMIndexFileManager;
 import edu.uci.ics.hyracks.storage.am.lsm.common.impls.BTreeFactory;
@@ -61,9 +60,8 @@
         }
     };
 
-    public LSMInvertedIndexFileManager(IIOManager ioManager, IFileMapProvider fileMapProvider, FileReference file,
-            BTreeFactory btreeFactory, int ioDeviceId) {
-        super(ioManager, fileMapProvider, file, null, ioDeviceId);
+    public LSMInvertedIndexFileManager(IFileMapProvider fileMapProvider, FileReference file, BTreeFactory btreeFactory) {
+        super(fileMapProvider, file, null);
         this.btreeFactory = btreeFactory;
     }
 
@@ -99,8 +97,8 @@
         ArrayList<ComparableFileName> allDeletedKeysBTreeFiles = new ArrayList<ComparableFileName>();
         ArrayList<ComparableFileName> allBloomFilterFiles = new ArrayList<ComparableFileName>();
 
-        // Gather files from the IODeviceHandle.
-        cleanupAndGetValidFilesInternal(dev, deletedKeysBTreeFilter, btreeFactory, allDeletedKeysBTreeFiles);
+        // Gather files.
+        cleanupAndGetValidFilesInternal(deletedKeysBTreeFilter, btreeFactory, allDeletedKeysBTreeFiles);
         HashSet<String> deletedKeysBTreeFilesSet = new HashSet<String>();
         for (ComparableFileName cmpFileName : allDeletedKeysBTreeFiles) {
             int index = cmpFileName.fileName.lastIndexOf(SPLIT_STRING);
@@ -108,9 +106,9 @@
         }
 
         // 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);
+        validateFiles(deletedKeysBTreeFilesSet, allInvListsFiles, invListFilter, null);
+        validateFiles(deletedKeysBTreeFilesSet, allDictBTreeFiles, dictBTreeFilter, btreeFactory);
+        validateFiles(deletedKeysBTreeFilesSet, allBloomFilterFiles, bloomFilterFilter, null);
 
         // Sanity check.
         if (allDictBTreeFiles.size() != allInvListsFiles.size()
@@ -151,30 +149,30 @@
         validComparableBloomFilterFiles.add(lastBloomFilter);
 
         for (int i = 1; i < allDictBTreeFiles.size(); i++) {
-            ComparableFileName currentRTree = allDictBTreeFiles.get(i);
-            ComparableFileName currentBTree = allDictBTreeFiles.get(i);
+            ComparableFileName currentDeletedKeysBTree = allDeletedKeysBTreeFiles.get(i);
+            ComparableFileName CurrentDictBTree = 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
+            if (currentDeletedKeysBTree.interval[0].compareTo(lastDeletedKeysBTree.interval[1]) > 0
+                    && CurrentDictBTree.interval[0].compareTo(lastDictBTree.interval[1]) > 0
                     && currentBloomFilter.interval[0].compareTo(lastBloomFilter.interval[1]) > 0) {
-                validComparableDictBTreeFiles.add(currentRTree);
-                validComparableDeletedKeysBTreeFiles.add(currentBTree);
+                validComparableDictBTreeFiles.add(CurrentDictBTree);
+                validComparableDeletedKeysBTreeFiles.add(currentDeletedKeysBTree);
                 validComparableBloomFilterFiles.add(currentBloomFilter);
-                lastDictBTree = currentRTree;
-                lastDeletedKeysBTree = currentBTree;
+                lastDictBTree = CurrentDictBTree;
+                lastDeletedKeysBTree = currentDeletedKeysBTree;
                 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
+            } else if (currentDeletedKeysBTree.interval[0].compareTo(lastDeletedKeysBTree.interval[0]) >= 0
+                    && currentDeletedKeysBTree.interval[1].compareTo(lastDeletedKeysBTree.interval[1]) <= 0
+                    && CurrentDictBTree.interval[0].compareTo(lastDictBTree.interval[0]) >= 0
+                    && CurrentDictBTree.interval[1].compareTo(lastDictBTree.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 invalidDeletedBTreeFile = new File(currentDeletedKeysBTree.fullPath);
+                invalidDeletedBTreeFile.delete();
+                File invalidDictBTreeFile = new File(CurrentDictBTree.fullPath);
+                invalidDictBTreeFile.delete();
                 File invalidBloomFilterFile = new File(currentBloomFilter.fullPath);
                 invalidBloomFilterFile.delete();
             } else {
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
index 9e5f75b..fd83bfb 100644
--- 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
@@ -18,6 +18,7 @@
 import java.util.LinkedList;
 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.IIndexAccessor;
 import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
@@ -66,7 +67,7 @@
 
     @Override
     // TODO: Ignore opcallback for now.
-    public void setOperation(IndexOperation newOp) {
+    public void setOperation(IndexOperation newOp) throws HyracksDataException {
         reset();
         switch (newOp) {
             case INSERT:
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
index b9f50a1..882d1a1 100644
--- 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
@@ -165,14 +165,7 @@
 
     @Override
     public void close() throws HyracksDataException {
-        try {
-            reset();
-            accessorIndex = -1;
-        } finally {
-            if (harness != null) {
-                harness.endSearch(opCtx);
-            }
-        }
+        reset();
     }
 
     @Override
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
index 068031d..222f4de 100644
--- 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
@@ -163,7 +163,7 @@
 
     @Override
     public IIndexAccessor createAccessor(IModificationOperationCallback modificationCallback,
-            ISearchOperationCallback searchCallback) {
+            ISearchOperationCallback searchCallback) throws HyracksDataException {
         return new InMemoryInvertedIndexAccessor(this, new InMemoryInvertedIndexOpContext(btree, tokenCmpFactories,
                 tokenizerFactory));
     }
@@ -188,8 +188,8 @@
     }
 
     @Override
-    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
-            throws IndexException {
+    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint,
+            boolean checkIfEmptyIndex) throws IndexException {
         throw new UnsupportedOperationException("Bulk load not supported by in-memory inverted index.");
     }
 
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
index fe8dfd8..7e9b483 100644
--- 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
@@ -43,7 +43,8 @@
     protected InMemoryInvertedIndex index;
     protected BTreeAccessor btreeAccessor;
 
-    public InMemoryInvertedIndexAccessor(InMemoryInvertedIndex index, IIndexOperationContext opCtx) {
+    public InMemoryInvertedIndexAccessor(InMemoryInvertedIndex index, IIndexOperationContext opCtx)
+            throws HyracksDataException {
         this.opCtx = opCtx;
         this.index = index;
         this.searcher = createSearcher();
@@ -110,7 +111,7 @@
         throw new UnsupportedOperationException("Upsert not supported by in-memory inverted index.");
     }
 
-    protected IInvertedIndexSearcher createSearcher() {
+    protected IInvertedIndexSearcher createSearcher() throws HyracksDataException {
         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/PartitionedInMemoryInvertedIndex.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/inmemory/PartitionedInMemoryInvertedIndex.java
index ae86990..eb06758 100644
--- 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
@@ -83,7 +83,7 @@
 
     @Override
     public IIndexAccessor createAccessor(IModificationOperationCallback modificationCallback,
-            ISearchOperationCallback searchCallback) {
+            ISearchOperationCallback searchCallback) throws HyracksDataException {
         return new PartitionedInMemoryInvertedIndexAccessor(this, new PartitionedInMemoryInvertedIndexOpContext(btree,
                 tokenCmpFactories, tokenizerFactory));
     }
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
index 133df88..6b8bf00 100644
--- 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
@@ -15,17 +15,19 @@
 
 package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.inmemory;
 
+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.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) {
+    public PartitionedInMemoryInvertedIndexAccessor(InMemoryInvertedIndex index, IIndexOperationContext opCtx)
+            throws HyracksDataException {
         super(index, opCtx);
     }
 
-    protected IInvertedIndexSearcher createSearcher() {
+    protected IInvertedIndexSearcher createSearcher() throws HyracksDataException {
         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/ondisk/OnDiskInvertedIndex.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/ondisk/OnDiskInvertedIndex.java
index 5f75f8d..0ab2f4d 100644
--- 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
@@ -303,7 +303,7 @@
         private final MultiComparator allCmp;
 
         public OnDiskInvertedIndexBulkLoader(float btreeFillFactor, boolean verifyInput, long numElementsHint,
-                int startPageId, int fileId) throws IndexException, HyracksDataException {
+                boolean checkIfEmptyIndex, int startPageId, int fileId) throws IndexException, HyracksDataException {
             this.verifyInput = verifyInput;
             this.tokenCmp = MultiComparator.create(btree.getComparatorFactories());
             this.invListCmp = MultiComparator.create(invListCmpFactories);
@@ -316,7 +316,8 @@
             this.btreeTupleReference = new ArrayTupleReference();
             this.lastTupleBuilder = new ArrayTupleBuilder(numTokenFields + numInvListKeys);
             this.lastTuple = new ArrayTupleReference();
-            this.btreeBulkloader = btree.createBulkLoader(btreeFillFactor, verifyInput, numElementsHint);
+            this.btreeBulkloader = btree.createBulkLoader(btreeFillFactor, verifyInput, numElementsHint,
+                    checkIfEmptyIndex);
             currentPageId = startPageId;
             currentPage = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, currentPageId), true);
             currentPage.acquireWriteLatch();
@@ -467,7 +468,7 @@
         private final IInvertedIndexSearcher searcher;
         private final IIndexOperationContext opCtx = new OnDiskInvertedIndexOpContext(btree);
 
-        public OnDiskInvertedIndexAccessor(OnDiskInvertedIndex index) {
+        public OnDiskInvertedIndexAccessor(OnDiskInvertedIndex index) throws HyracksDataException {
             this.index = index;
             this.searcher = new TOccurrenceSearcher(ctx, index);
         }
@@ -535,7 +536,7 @@
 
     @Override
     public IIndexAccessor createAccessor(IModificationOperationCallback modificationCallback,
-            ISearchOperationCallback searchCallback) {
+            ISearchOperationCallback searchCallback) throws HyracksDataException {
         return new OnDiskInvertedIndexAccessor(this);
     }
 
@@ -563,10 +564,11 @@
     }
 
     @Override
-    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
-            throws IndexException {
+    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint,
+            boolean checkIfEmptyIndex) throws IndexException {
         try {
-            return new OnDiskInvertedIndexBulkLoader(fillFactor, verifyInput, numElementsHint, rootPageId, fileId);
+            return new OnDiskInvertedIndexBulkLoader(fillFactor, verifyInput, numElementsHint, checkIfEmptyIndex,
+                    rootPageId, fileId);
         } catch (HyracksDataException e) {
             throw new InvertedIndexException(e);
         }
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
index 2b2a174..6f7873b 100644
--- 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
@@ -51,14 +51,14 @@
     }
 
     public class PartitionedOnDiskInvertedIndexAccessor extends OnDiskInvertedIndexAccessor {
-        public PartitionedOnDiskInvertedIndexAccessor(OnDiskInvertedIndex index) {
+        public PartitionedOnDiskInvertedIndexAccessor(OnDiskInvertedIndex index) throws HyracksDataException {
             super(index, new PartitionedTOccurrenceSearcher(ctx, index));
         }
     }
 
     @Override
     public IIndexAccessor createAccessor(IModificationOperationCallback modificationCallback,
-            ISearchOperationCallback searchCallback) {
+            ISearchOperationCallback searchCallback) throws HyracksDataException {
         return new PartitionedOnDiskInvertedIndexAccessor(this);
     }
 
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
index 44d2b5d..2bbf1f3 100644
--- 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
@@ -68,7 +68,7 @@
     protected final IObjectFactory<IInvertedListCursor> invListCursorFactory;
     protected final ObjectCache<IInvertedListCursor> invListCursorCache;
 
-    public AbstractTOccurrenceSearcher(IHyracksCommonContext ctx, IInvertedIndex invIndex) {
+    public AbstractTOccurrenceSearcher(IHyracksCommonContext ctx, IInvertedIndex invIndex) throws HyracksDataException {
         this.ctx = ctx;
         this.invListMerger = new InvertedListMerger(ctx, invIndex);
         this.searchResult = new SearchResult(invIndex.getInvListTypeTraits(), ctx);
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
index a6b825a..692a640 100644
--- 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
@@ -38,7 +38,7 @@
     protected SearchResult prevSearchResult;
     protected SearchResult newSearchResult;
 
-    public InvertedListMerger(IHyracksCommonContext ctx, IInvertedIndex invIndex) {
+    public InvertedListMerger(IHyracksCommonContext ctx, IInvertedIndex invIndex) throws HyracksDataException {
         this.invListCmp = MultiComparator.createIgnoreFieldLength(invIndex.getInvListCmpFactories());
         this.prevSearchResult = new SearchResult(invIndex.getInvListTypeTraits(), ctx);
         this.newSearchResult = new SearchResult(prevSearchResult);
@@ -72,11 +72,9 @@
                 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);
+                    mergeSuffixListProbe(invListCursor, prevSearchResult, result, i, numInvLists, occurrenceThreshold);
                 } else {
-                    mergeSuffixListScan(invListCursor, prevSearchResult, result, i, numInvLists,
-                            occurrenceThreshold);
+                    mergeSuffixListScan(invListCursor, prevSearchResult, result, i, numInvLists, occurrenceThreshold);
                 }
             }
             invListCursor.unpinPages();
@@ -319,7 +317,7 @@
         }
     }
 
-    public SearchResult createSearchResult() {
+    public SearchResult createSearchResult() throws HyracksDataException {
         return new SearchResult(prevSearchResult);
     }
 
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
index 18313c1..adad532 100644
--- 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
@@ -49,7 +49,8 @@
     protected final ArrayList<IInvertedListCursor> cursorsOrderedByTokens = new ArrayList<IInvertedListCursor>();
     protected final InvertedListPartitions partitions = new InvertedListPartitions();
 
-    public PartitionedTOccurrenceSearcher(IHyracksCommonContext ctx, IInvertedIndex invIndex) {
+    public PartitionedTOccurrenceSearcher(IHyracksCommonContext ctx, IInvertedIndex invIndex)
+            throws HyracksDataException {
         super(ctx, invIndex);
         initHelperTuples();
     }
@@ -89,19 +90,19 @@
         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);
@@ -112,16 +113,16 @@
                     partitions, cursorsOrderedByTokens)) {
                 maxCountPossible--;
                 // No results possible.
-                if (maxCountPossible < occurrenceThreshold) {                    
+                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
@@ -145,7 +146,7 @@
                 cursorsOrderedByTokens.get(i).pinPages();
             }
         }
-        
+
         // Process the partitions one-by-one.
         for (int i = start; i <= end; i++) {
             if (partitionCursors[i] == null) {
@@ -160,7 +161,7 @@
             invListMerger.reset();
             invListMerger.merge(partitionCursors[i], 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/search/SearchResult.java b/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/SearchResult.java
index b091195..c4056c5 100644
--- 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
@@ -20,6 +20,7 @@
 
 import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
+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.accessors.ITupleReference;
 import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk.FixedSizeFrameTupleAccessor;
@@ -42,7 +43,7 @@
     protected int currBufIdx;
     protected int numResults;
 
-    public SearchResult(ITypeTraits[] invListFields, IHyracksCommonContext ctx) {
+    public SearchResult(ITypeTraits[] invListFields, IHyracksCommonContext ctx) throws HyracksDataException {
         typeTraits = new ITypeTraits[invListFields.length + 1];
         int tmp = 0;
         for (int i = 0; i < invListFields.length; i++) {
@@ -61,8 +62,10 @@
 
     /**
      * Initialize from other search-result object to share member instances except for result buffers.
+     * 
+     * @throws HyracksDataException
      */
-    public SearchResult(SearchResult other) {
+    public SearchResult(SearchResult other) throws HyracksDataException {
         this.ctx = other.ctx;
         this.appender = other.appender;
         this.accessor = other.accessor;
@@ -102,7 +105,7 @@
         }
     }
 
-    public void append(ITupleReference invListElement, int count) {
+    public void append(ITupleReference invListElement, int count) throws HyracksDataException {
         ByteBuffer currentBuffer = buffers.get(currBufIdx);
         if (!appender.hasSpace()) {
             currBufIdx++;
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
index 25552ea..348ef75 100644
--- 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
@@ -31,7 +31,7 @@
 
     protected final ArrayList<IInvertedListCursor> invListCursors = new ArrayList<IInvertedListCursor>();
 
-    public TOccurrenceSearcher(IHyracksCommonContext ctx, IInvertedIndex invIndex) {
+    public TOccurrenceSearcher(IHyracksCommonContext ctx, IInvertedIndex invIndex) throws HyracksDataException {
         super(ctx, invIndex);
     }
 
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
index 17a6742..9d85f56 100644
--- 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
@@ -20,7 +20,6 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.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;
@@ -120,21 +119,9 @@
             IFileMapProvider diskFileMapProvider, ITypeTraits[] invListTypeTraits,
             IBinaryComparatorFactory[] invListCmpFactories, ITypeTraits[] tokenTypeTraits,
             IBinaryComparatorFactory[] tokenCmpFactories, IBinaryTokenizerFactory tokenizerFactory,
-            IBufferCache diskBufferCache, IIOManager ioManager, String onDiskDir, double bloomFilterFalsePositiveRate,
+            IBufferCache diskBufferCache, String onDiskDir, double bloomFilterFalsePositiveRate,
             ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker, ILSMIOOperationScheduler ioScheduler,
             ILSMIOOperationCallbackProvider ioOpCallbackProvider) throws IndexException {
-        return createLSMInvertedIndex(virtualBufferCache, diskFileMapProvider, invListTypeTraits, invListCmpFactories,
-                tokenTypeTraits, tokenCmpFactories, tokenizerFactory, diskBufferCache, ioManager, onDiskDir,
-                bloomFilterFalsePositiveRate, mergePolicy, opTracker, ioScheduler, ioOpCallbackProvider, 0);
-    }
-
-    public static LSMInvertedIndex createLSMInvertedIndex(IVirtualBufferCache virtualBufferCache,
-            IFileMapProvider diskFileMapProvider, ITypeTraits[] invListTypeTraits,
-            IBinaryComparatorFactory[] invListCmpFactories, ITypeTraits[] tokenTypeTraits,
-            IBinaryComparatorFactory[] tokenCmpFactories, IBinaryTokenizerFactory tokenizerFactory,
-            IBufferCache diskBufferCache, IIOManager ioManager, String onDiskDir, double bloomFilterFalsePositiveRate,
-            ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker, ILSMIOOperationScheduler ioScheduler,
-            ILSMIOOperationCallbackProvider ioOpCallbackProvider, int ioDeviceId) throws IndexException {
 
         BTreeFactory deletedKeysBTreeFactory = createDeletedKeysBTreeFactory(diskFileMapProvider, invListTypeTraits,
                 invListCmpFactories, diskBufferCache);
@@ -147,8 +134,8 @@
                 bloomFilterKeyFields);
 
         FileReference onDiskDirFileRef = new FileReference(new File(onDiskDir));
-        LSMInvertedIndexFileManager fileManager = new LSMInvertedIndexFileManager(ioManager, diskFileMapProvider,
-                onDiskDirFileRef, deletedKeysBTreeFactory, ioDeviceId);
+        LSMInvertedIndexFileManager fileManager = new LSMInvertedIndexFileManager(diskFileMapProvider,
+                onDiskDirFileRef, deletedKeysBTreeFactory);
 
         IInvertedListBuilderFactory invListBuilderFactory = new FixedSizeElementInvertedListBuilderFactory(
                 invListTypeTraits);
@@ -167,21 +154,9 @@
             IFileMapProvider diskFileMapProvider, ITypeTraits[] invListTypeTraits,
             IBinaryComparatorFactory[] invListCmpFactories, ITypeTraits[] tokenTypeTraits,
             IBinaryComparatorFactory[] tokenCmpFactories, IBinaryTokenizerFactory tokenizerFactory,
-            IBufferCache diskBufferCache, IIOManager ioManager, String onDiskDir, double bloomFilterFalsePositiveRate,
+            IBufferCache diskBufferCache, String onDiskDir, double bloomFilterFalsePositiveRate,
             ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker, ILSMIOOperationScheduler ioScheduler,
             ILSMIOOperationCallbackProvider ioOpCallbackProvider) throws IndexException {
-        return createPartitionedLSMInvertedIndex(virtualBufferCache, diskFileMapProvider, invListTypeTraits,
-                invListCmpFactories, tokenTypeTraits, tokenCmpFactories, tokenizerFactory, diskBufferCache, ioManager,
-                onDiskDir, bloomFilterFalsePositiveRate, mergePolicy, opTracker, ioScheduler, ioOpCallbackProvider, 0);
-    }
-
-    public static PartitionedLSMInvertedIndex createPartitionedLSMInvertedIndex(IVirtualBufferCache virtualBufferCache,
-            IFileMapProvider diskFileMapProvider, ITypeTraits[] invListTypeTraits,
-            IBinaryComparatorFactory[] invListCmpFactories, ITypeTraits[] tokenTypeTraits,
-            IBinaryComparatorFactory[] tokenCmpFactories, IBinaryTokenizerFactory tokenizerFactory,
-            IBufferCache diskBufferCache, IIOManager ioManager, String onDiskDir, double bloomFilterFalsePositiveRate,
-            ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker, ILSMIOOperationScheduler ioScheduler,
-            ILSMIOOperationCallbackProvider ioOpCallbackProvider, int ioDeviceId) throws IndexException {
 
         BTreeFactory deletedKeysBTreeFactory = createDeletedKeysBTreeFactory(diskFileMapProvider, invListTypeTraits,
                 invListCmpFactories, diskBufferCache);
@@ -194,8 +169,8 @@
                 bloomFilterKeyFields);
 
         FileReference onDiskDirFileRef = new FileReference(new File(onDiskDir));
-        LSMInvertedIndexFileManager fileManager = new LSMInvertedIndexFileManager(ioManager, diskFileMapProvider,
-                onDiskDirFileRef, deletedKeysBTreeFactory, ioDeviceId);
+        LSMInvertedIndexFileManager fileManager = new LSMInvertedIndexFileManager(diskFileMapProvider,
+                onDiskDirFileRef, deletedKeysBTreeFactory);
 
         IInvertedListBuilderFactory invListBuilderFactory = new FixedSizeElementInvertedListBuilderFactory(
                 invListTypeTraits);
diff --git a/hyracks/hyracks-storage-am-lsm-rtree/pom.xml b/hyracks/hyracks-storage-am-lsm-rtree/pom.xml
index 080ba68..09a7fbf 100644
--- a/hyracks/hyracks-storage-am-lsm-rtree/pom.xml
+++ b/hyracks/hyracks-storage-am-lsm-rtree/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -39,21 +39,21 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-lsm-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-rtree</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  		
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
index 169efc4..9fc8cea 100644
--- 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
@@ -21,7 +21,6 @@
 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.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
@@ -73,18 +72,17 @@
     @Override
     public ITreeIndex createIndexInstance() throws HyracksDataException {
         AbstractTreeIndexOperatorDescriptor treeOpDesc = (AbstractTreeIndexOperatorDescriptor) opDesc;
-        return createLSMTree(virtualBufferCache, ctx.getIOManager(), file,
-                opDesc.getStorageManager().getBufferCache(ctx), opDesc.getStorageManager().getFileMapProvider(ctx),
-                treeOpDesc.getTreeIndexTypeTraits(), treeOpDesc.getTreeIndexComparatorFactories(),
-                btreeComparatorFactories, opTrackerFactory.getOperationTracker(ctx), valueProviderFactories,
-                rtreePolicyType, linearizeCmpFactory, partition);
+        return createLSMTree(virtualBufferCache, file, opDesc.getStorageManager().getBufferCache(ctx), opDesc
+                .getStorageManager().getFileMapProvider(ctx), treeOpDesc.getTreeIndexTypeTraits(),
+                treeOpDesc.getTreeIndexComparatorFactories(), btreeComparatorFactories,
+                opTrackerFactory.getOperationTracker(ctx), valueProviderFactories, rtreePolicyType, linearizeCmpFactory);
 
     }
 
-    protected abstract ITreeIndex createLSMTree(IVirtualBufferCache virtualBufferCache, IIOManager ioManager,
-            FileReference file, IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider,
-            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
-            IBinaryComparatorFactory[] btreeCmpFactories, ILSMOperationTracker opTracker,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
-            ILinearizeComparatorFactory linearizeCmpFactory, int startIODeviceIndex) throws HyracksDataException;
+    protected abstract ITreeIndex createLSMTree(IVirtualBufferCache virtualBufferCache, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
+            ILSMOperationTracker opTracker, IPrimitiveValueProviderFactory[] valueProviderFactories,
+            RTreePolicyType rtreePolicyType, ILinearizeComparatorFactory linearizeCmpFactory)
+            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
index f8b6792..b47bc02 100644
--- 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
@@ -21,7 +21,6 @@
 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.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
@@ -62,18 +61,17 @@
     }
 
     @Override
-    protected ITreeIndex createLSMTree(IVirtualBufferCache virtualBufferCache, IIOManager ioManager,
-            FileReference file, IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider,
-            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
-            IBinaryComparatorFactory[] btreeCmpFactories, ILSMOperationTracker opTracker,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
-            ILinearizeComparatorFactory linearizeCmpFactory, int startIODeviceIndex) throws HyracksDataException {
+    protected ITreeIndex createLSMTree(IVirtualBufferCache virtualBufferCache, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
+            ILSMOperationTracker opTracker, IPrimitiveValueProviderFactory[] valueProviderFactories,
+            RTreePolicyType rtreePolicyType, ILinearizeComparatorFactory linearizeCmpFactory)
+            throws HyracksDataException {
         try {
-            return LSMRTreeUtils.createLSMTree(virtualBufferCache, ioManager, file, diskBufferCache,
-                    diskFileMapProvider, typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories,
-                    rtreePolicyType, bloomFilterFalsePositiveRate, mergePolicy, opTracker, ioScheduler,
-                    ioOpCallbackProvider, linearizeCmpFactory,
-                    opDesc.getFileSplitProvider().getFileSplits()[partition].getIODeviceId());
+            return LSMRTreeUtils.createLSMTree(virtualBufferCache, file, diskBufferCache, diskFileMapProvider,
+                    typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories, rtreePolicyType,
+                    bloomFilterFalsePositiveRate, mergePolicy, opTracker, ioScheduler, ioOpCallbackProvider,
+                    linearizeCmpFactory);
         } 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/LSMRTreeWithAntiMatterTuplesDataflowHelper.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/dataflow/LSMRTreeWithAntiMatterTuplesDataflowHelper.java
index 3163e3a..ea1b1e2 100644
--- 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
@@ -21,7 +21,6 @@
 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.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
@@ -49,17 +48,16 @@
     }
 
     @Override
-    protected ITreeIndex createLSMTree(IVirtualBufferCache virtualBufferCache, IIOManager ioManager,
-            FileReference file, IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider,
-            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
-            IBinaryComparatorFactory[] btreeCmpFactories, ILSMOperationTracker opTracker,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
-            ILinearizeComparatorFactory linearizeCmpFactory, int startIODeviceIndex) throws HyracksDataException {
+    protected ITreeIndex createLSMTree(IVirtualBufferCache virtualBufferCache, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
+            ILSMOperationTracker opTracker, IPrimitiveValueProviderFactory[] valueProviderFactories,
+            RTreePolicyType rtreePolicyType, ILinearizeComparatorFactory linearizeCmpFactory)
+            throws HyracksDataException {
         try {
-            return LSMRTreeUtils.createLSMTreeWithAntiMatterTuples(virtualBufferCache, ioManager, file,
-                    diskBufferCache, diskFileMapProvider, typeTraits, rtreeCmpFactories, btreeCmpFactories,
-                    valueProviderFactories, rtreePolicyType, mergePolicy, opTracker, ioScheduler, ioOpCallbackProvider,
-                    linearizeCmpFactory, startIODeviceIndex);
+            return LSMRTreeUtils.createLSMTreeWithAntiMatterTuples(virtualBufferCache, file, diskBufferCache,
+                    diskFileMapProvider, typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories,
+                    rtreePolicyType, mergePolicy, opTracker, ioScheduler, ioOpCallbackProvider, linearizeCmpFactory);
         } 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/impls/AbstractLSMRTree.java b/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/impls/AbstractLSMRTree.java
index 632d462..e3e690b 100644
--- 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
@@ -185,6 +185,7 @@
 
         mutableComponent.getRTree().clear();
         mutableComponent.getBTree().clear();
+        mutableComponent.reset();
     }
 
     @Override
@@ -346,11 +347,7 @@
     }
 
     public boolean isEmptyIndex() throws HyracksDataException {
-        return componentsRef.get().isEmpty()
-                && mutableComponent.getBTree().isEmptyTree(
-                        mutableComponent.getBTree().getInteriorFrameFactory().createFrame())
-                && mutableComponent.getRTree().isEmptyTree(
-                        mutableComponent.getRTree().getInteriorFrameFactory().createFrame());
+        return componentsRef.get().isEmpty() && !mutableComponent.isModified();
     }
 
     @Override
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
index 2013d74..0b71373 100644
--- 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
@@ -263,7 +263,7 @@
         if (!isEmpty) {
             rTreeTupleSorter.sort();
 
-            rTreeBulkloader = diskRTree.createBulkLoader(1.0f, false, 0L);
+            rTreeBulkloader = diskRTree.createBulkLoader(1.0f, false, 0L, false);
             cursor = rTreeTupleSorter;
 
             try {
@@ -305,7 +305,7 @@
             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 bTreeBulkloader = diskBTree.createBulkLoader(1.0f, false, numBTreeTuples, false);
             IIndexBulkLoader builder = component.getBloomFilter().createBuilder(numBTreeTuples,
                     bloomFilterSpec.getNumHashes(), bloomFilterSpec.getNumBucketsPerElements());
             // scan the memory BTree
@@ -356,7 +356,7 @@
 
         LSMRTreeImmutableComponent mergedComponent = createDiskComponent(componentFactory,
                 mergeOp.getRTreeMergeTarget(), mergeOp.getBTreeMergeTarget(), mergeOp.getBloomFilterMergeTarget(), true);
-        IIndexBulkLoader bulkLoader = mergedComponent.getRTree().createBulkLoader(1.0f, false, 0L);
+        IIndexBulkLoader bulkLoader = mergedComponent.getRTree().createBulkLoader(1.0f, false, 0L, false);
 
         try {
             while (cursor.hasNext()) {
@@ -400,59 +400,72 @@
     }
 
     @Override
-    public IIndexBulkLoader createBulkLoader(float fillLevel, boolean verifyInput, long numElementsHint)
-            throws TreeIndexException {
-        return new LSMRTreeBulkLoader(fillLevel, verifyInput, numElementsHint);
+    public IIndexBulkLoader createBulkLoader(float fillLevel, boolean verifyInput, long numElementsHint,
+            boolean checkIfEmptyIndex) throws TreeIndexException {
+        try {
+            return new LSMRTreeBulkLoader(fillLevel, verifyInput, numElementsHint, checkIfEmptyIndex);
+        } catch (HyracksDataException e) {
+            throw new TreeIndexException(e);
+        }
     }
 
     public class LSMRTreeBulkLoader implements IIndexBulkLoader {
         private final ILSMComponent component;
         private final IIndexBulkLoader bulkLoader;
+        private boolean cleanedUpArtifacts = false;
+        private boolean isEmptyComponent = true;
 
-        public LSMRTreeBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
-                throws TreeIndexException {
+        public LSMRTreeBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint, boolean checkIfEmptyIndex)
+                throws TreeIndexException, HyracksDataException {
+            if (checkIfEmptyIndex && !isEmptyIndex()) {
+                throw new TreeIndexException("Cannot load an index that is not empty");
+            }
             // 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) {
+            } catch (HyracksDataException | IndexException e) {
                 throw new TreeIndexException(e);
             }
             bulkLoader = ((LSMRTreeImmutableComponent) component).getRTree().createBulkLoader(fillFactor, verifyInput,
-                    numElementsHint);
+                    numElementsHint, false);
         }
 
         @Override
         public void add(ITupleReference tuple) throws HyracksDataException, IndexException {
             try {
                 bulkLoader.add(tuple);
-            } catch (IndexException e) {
-                handleException();
+            } catch (IndexException | HyracksDataException | RuntimeException e) {
+                cleanupArtifacts();
                 throw e;
-            } catch (HyracksDataException e) {
-                handleException();
-                throw e;
-            } catch (RuntimeException e) {
-                handleException();
-                throw e;
+            }
+            if (isEmptyComponent) {
+                isEmptyComponent = false;
             }
         }
 
         @Override
         public void end() throws HyracksDataException, IndexException {
-            bulkLoader.end();
-            lsmHarness.addBulkLoadedComponent(component);
+            if (!cleanedUpArtifacts) {
+                bulkLoader.end();
+                if (isEmptyComponent) {
+                    cleanupArtifacts();
+                } else {
+                    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();
+        protected void cleanupArtifacts() throws HyracksDataException {
+            if (!cleanedUpArtifacts) {
+                cleanedUpArtifacts = true;
+                ((LSMRTreeImmutableComponent) component).getRTree().deactivate();
+                ((LSMRTreeImmutableComponent) component).getRTree().destroy();
+                ((LSMRTreeImmutableComponent) component).getBTree().deactivate();
+                ((LSMRTreeImmutableComponent) component).getBTree().destroy();
+                ((LSMRTreeImmutableComponent) component).getBloomFilter().deactivate();
+                ((LSMRTreeImmutableComponent) component).getBloomFilter().destroy();
+            }
         }
     }
 
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
index cfdf706..9502d5e 100644
--- 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
@@ -26,7 +26,6 @@
 
 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.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
 import edu.uci.ics.hyracks.storage.am.lsm.common.impls.AbstractLSMIndexFileManager;
@@ -53,10 +52,9 @@
         }
     };
 
-    public LSMRTreeFileManager(IIOManager ioManager, IFileMapProvider fileMapProvider, FileReference file,
-            TreeIndexFactory<? extends ITreeIndex> rtreeFactory, TreeIndexFactory<? extends ITreeIndex> btreeFactory,
-            int ioDeviceId) {
-        super(ioManager, fileMapProvider, file, null, ioDeviceId);
+    public LSMRTreeFileManager(IFileMapProvider fileMapProvider, FileReference file,
+            TreeIndexFactory<? extends ITreeIndex> rtreeFactory, TreeIndexFactory<? extends ITreeIndex> btreeFactory) {
+        super(fileMapProvider, file, null);
         this.rtreeFactory = rtreeFactory;
         this.btreeFactory = btreeFactory;
     }
@@ -92,15 +90,15 @@
         ArrayList<ComparableFileName> allBTreeFiles = new ArrayList<ComparableFileName>();
         ArrayList<ComparableFileName> allBloomFilterFiles = new ArrayList<ComparableFileName>();
 
-        // Gather files from the IODeviceHandle.
-        cleanupAndGetValidFilesInternal(dev, btreeFilter, btreeFactory, allBTreeFiles);
+        // Gather files.
+        cleanupAndGetValidFilesInternal(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);
+        validateFiles(btreeFilesSet, allRTreeFiles, rtreeFilter, rtreeFactory);
+        validateFiles(btreeFilesSet, allBloomFilterFiles, bloomFilterFilter, null);
 
         // Sanity check.
         if (allRTreeFiles.size() != allBTreeFiles.size() || allBTreeFiles.size() != allBloomFilterFiles.size()) {
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
index cf3bbc6e..0be497a 100644
--- 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
@@ -273,7 +273,7 @@
             bTreeTupleSorter.sort();
         }
 
-        IIndexBulkLoader rTreeBulkloader = diskRTree.createBulkLoader(1.0f, false, 0L);
+        IIndexBulkLoader rTreeBulkloader = diskRTree.createBulkLoader(1.0f, false, 0L, false);
         LSMRTreeWithAntiMatterTuplesFlushCursor cursor = new LSMRTreeWithAntiMatterTuplesFlushCursor(rTreeTupleSorter,
                 bTreeTupleSorter, comparatorFields, linearizerArray);
         cursor.open(null, null);
@@ -326,7 +326,7 @@
         LSMRTreeImmutableComponent component = createDiskComponent(componentFactory, mergeOp.getRTreeMergeTarget(),
                 null, null, true);
         RTree mergedRTree = component.getRTree();
-        IIndexBulkLoader bulkloader = mergedRTree.createBulkLoader(1.0f, false, 0L);
+        IIndexBulkLoader bulkloader = mergedRTree.createBulkLoader(1.0f, false, 0L, false);
         try {
             while (cursor.hasNext()) {
                 cursor.next();
@@ -363,9 +363,14 @@
     }
 
     @Override
-    public IIndexBulkLoader createBulkLoader(float fillLevel, boolean verifyInput, long numElementsHint)
-            throws TreeIndexException {
-        return new LSMRTreeWithAntiMatterTuplesBulkLoader(fillLevel, verifyInput, numElementsHint);
+    public IIndexBulkLoader createBulkLoader(float fillLevel, boolean verifyInput, long numElementsHint,
+            boolean checkIfEmptyIndex) throws TreeIndexException {
+        try {
+            return new LSMRTreeWithAntiMatterTuplesBulkLoader(fillLevel, verifyInput, numElementsHint,
+                    checkIfEmptyIndex);
+        } catch (HyracksDataException e) {
+            throw new TreeIndexException(e);
+        }
     }
 
     private ILSMComponent createBulkLoadTarget() throws HyracksDataException, IndexException {
@@ -377,47 +382,56 @@
     public class LSMRTreeWithAntiMatterTuplesBulkLoader implements IIndexBulkLoader {
         private final ILSMComponent component;
         private final IIndexBulkLoader bulkLoader;
+        private boolean cleanedUpArtifacts = false;
+        private boolean isEmptyComponent = true;
 
-        public LSMRTreeWithAntiMatterTuplesBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
-                throws TreeIndexException {
+        public LSMRTreeWithAntiMatterTuplesBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint,
+                boolean checkIfEmptyIndex) throws TreeIndexException, HyracksDataException {
+            if (checkIfEmptyIndex && !isEmptyIndex()) {
+                throw new TreeIndexException("Cannot load an index that is not empty");
+            }
             // 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) {
+            } catch (HyracksDataException | IndexException e) {
                 throw new TreeIndexException(e);
             }
             bulkLoader = ((LSMRTreeImmutableComponent) component).getRTree().createBulkLoader(fillFactor, verifyInput,
-                    numElementsHint);
+                    numElementsHint, false);
         }
 
         @Override
         public void add(ITupleReference tuple) throws HyracksDataException, IndexException {
             try {
                 bulkLoader.add(tuple);
-            } catch (IndexException e) {
-                handleException();
+            } catch (IndexException | HyracksDataException | RuntimeException e) {
+                cleanupArtifacts();
                 throw e;
-            } catch (HyracksDataException e) {
-                handleException();
-                throw e;
-            } catch (RuntimeException e) {
-                handleException();
-                throw e;
+            }
+            if (isEmptyComponent) {
+                isEmptyComponent = false;
             }
         }
 
         @Override
         public void end() throws HyracksDataException, IndexException {
-            bulkLoader.end();
-            lsmHarness.addBulkLoadedComponent(component);
+            if (!cleanedUpArtifacts) {
+                bulkLoader.end();
+                if (isEmptyComponent) {
+                    cleanupArtifacts();
+                } else {
+                    lsmHarness.addBulkLoadedComponent(component);
+                }
+            }
         }
 
-        protected void handleException() throws HyracksDataException {
-            ((LSMRTreeImmutableComponent) component).getRTree().deactivate();
-            ((LSMRTreeImmutableComponent) component).getRTree().destroy();
+        protected void cleanupArtifacts() throws HyracksDataException {
+            if (!cleanedUpArtifacts) {
+                cleanedUpArtifacts = true;
+                ((LSMRTreeImmutableComponent) component).getRTree().deactivate();
+                ((LSMRTreeImmutableComponent) component).getRTree().destroy();
+            }
         }
 
     }
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
index f426dea..8ef143f 100644
--- 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
@@ -16,7 +16,6 @@
 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;
@@ -24,8 +23,8 @@
 
 public class LSMRTreeWithAntiMatterTuplesFileManager extends AbstractLSMIndexFileManager {
 
-    public LSMRTreeWithAntiMatterTuplesFileManager(IIOManager ioManager, IFileMapProvider fileMapProvider,
-            FileReference file, TreeIndexFactory<? extends ITreeIndex> rtreeFactory, int ioDeviceId) {
-        super(ioManager, fileMapProvider, file, rtreeFactory, ioDeviceId);
+    public LSMRTreeWithAntiMatterTuplesFileManager(IFileMapProvider fileMapProvider, FileReference file,
+            TreeIndexFactory<? extends ITreeIndex> rtreeFactory) {
+        super(fileMapProvider, file, rtreeFactory);
     }
 }
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
index 07c6815..50e5d09 100644
--- 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
@@ -19,7 +19,6 @@
 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;
@@ -59,28 +58,13 @@
 import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
 public class LSMRTreeUtils {
-    public static LSMRTree createLSMTree(IVirtualBufferCache virtualBufferCache, IIOManager ioManager,
-            FileReference file, IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider,
-            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
-            IBinaryComparatorFactory[] btreeCmpFactories, IPrimitiveValueProviderFactory[] valueProviderFactories,
-            RTreePolicyType rtreePolicyType, double bloomFilterFalsePositiveRate, ILSMMergePolicy mergePolicy,
-            ILSMOperationTracker opTracker, ILSMIOOperationScheduler ioScheduler,
-            ILSMIOOperationCallbackProvider ioOpCallbackProvider, ILinearizeComparatorFactory linearizeCmpFactory)
-            throws TreeIndexException {
-        return createLSMTree(virtualBufferCache, ioManager, file, diskBufferCache, diskFileMapProvider, typeTraits,
-                rtreeCmpFactories, btreeCmpFactories, valueProviderFactories, rtreePolicyType,
-                bloomFilterFalsePositiveRate, mergePolicy, opTracker, ioScheduler, ioOpCallbackProvider,
-                linearizeCmpFactory, 0);
-    }
-
-    public static LSMRTree createLSMTree(IVirtualBufferCache virtualBufferCache, IIOManager ioManager,
-            FileReference file, IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider,
-            ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
-            IBinaryComparatorFactory[] btreeCmpFactories, IPrimitiveValueProviderFactory[] valueProviderFactories,
-            RTreePolicyType rtreePolicyType, double bloomFilterFalsePositiveRate, ILSMMergePolicy mergePolicy,
-            ILSMOperationTracker opTracker, ILSMIOOperationScheduler ioScheduler,
-            ILSMIOOperationCallbackProvider ioOpCallbackProvider, ILinearizeComparatorFactory linearizeCmpFactory,
-            int ioDeviceId) throws TreeIndexException {
+    public static LSMRTree createLSMTree(IVirtualBufferCache virtualBufferCache, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
+            double bloomFilterFalsePositiveRate, ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker,
+            ILSMIOOperationScheduler ioScheduler, ILSMIOOperationCallbackProvider ioOpCallbackProvider,
+            ILinearizeComparatorFactory linearizeCmpFactory) throws TreeIndexException {
         LSMTypeAwareTupleWriterFactory rtreeTupleWriterFactory = new LSMTypeAwareTupleWriterFactory(typeTraits, false);
         LSMTypeAwareTupleWriterFactory btreeTupleWriterFactory = new LSMTypeAwareTupleWriterFactory(typeTraits, true);
 
@@ -113,8 +97,8 @@
         BloomFilterFactory bloomFilterFactory = new BloomFilterFactory(diskBufferCache, diskFileMapProvider,
                 bloomFilterKeyFields);
 
-        ILSMIndexFileManager fileNameManager = new LSMRTreeFileManager(ioManager, diskFileMapProvider, file,
-                diskRTreeFactory, diskBTreeFactory, ioDeviceId);
+        ILSMIndexFileManager fileNameManager = new LSMRTreeFileManager(diskFileMapProvider, file, diskRTreeFactory,
+                diskBTreeFactory);
         LSMRTree lsmTree = new LSMRTree(virtualBufferCache, rtreeInteriorFrameFactory, rtreeLeafFrameFactory,
                 btreeInteriorFrameFactory, btreeLeafFrameFactory, fileNameManager, diskRTreeFactory, diskBTreeFactory,
                 bloomFilterFactory, bloomFilterFalsePositiveRate, diskFileMapProvider, typeTraits.length,
@@ -124,26 +108,13 @@
     }
 
     public static LSMRTreeWithAntiMatterTuples createLSMTreeWithAntiMatterTuples(
-            IVirtualBufferCache virtualBufferCache, IIOManager ioManager, FileReference file,
-            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
+            IVirtualBufferCache virtualBufferCache, FileReference file, IBufferCache diskBufferCache,
+            IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
             IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
             ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker, ILSMIOOperationScheduler ioScheduler,
             ILSMIOOperationCallbackProvider ioOpCallbackProvider, ILinearizeComparatorFactory linearizerCmpFactory)
             throws TreeIndexException {
-        return createLSMTreeWithAntiMatterTuples(virtualBufferCache, ioManager, file, diskBufferCache,
-                diskFileMapProvider, typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories,
-                rtreePolicyType, mergePolicy, opTracker, ioScheduler, ioOpCallbackProvider, linearizerCmpFactory, 0);
-    }
-
-    public static LSMRTreeWithAntiMatterTuples createLSMTreeWithAntiMatterTuples(
-            IVirtualBufferCache virtualBufferCache, IIOManager ioManager, FileReference file,
-            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ITypeTraits[] typeTraits,
-            IBinaryComparatorFactory[] rtreeCmpFactories, IBinaryComparatorFactory[] btreeCmpFactories,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, RTreePolicyType rtreePolicyType,
-            ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker, ILSMIOOperationScheduler ioScheduler,
-            ILSMIOOperationCallbackProvider ioOpCallbackProvider, ILinearizeComparatorFactory linearizerCmpFactory,
-            int ioDeviceId) throws TreeIndexException {
         LSMRTreeTupleWriterFactory rtreeTupleWriterFactory = new LSMRTreeTupleWriterFactory(typeTraits, false);
         LSMRTreeTupleWriterFactory btreeTupleWriterFactory = new LSMRTreeTupleWriterFactory(typeTraits, true);
 
@@ -178,8 +149,8 @@
         IBinaryComparatorFactory[] linearizerArray = { linearizerCmpFactory,
                 btreeCmpFactories[btreeCmpFactories.length - 1] };
 
-        ILSMIndexFileManager fileNameManager = new LSMRTreeWithAntiMatterTuplesFileManager(ioManager,
-                diskFileMapProvider, file, diskRTreeFactory, ioDeviceId);
+        ILSMIndexFileManager fileNameManager = new LSMRTreeWithAntiMatterTuplesFileManager(diskFileMapProvider, file,
+                diskRTreeFactory);
         LSMRTreeWithAntiMatterTuples lsmTree = new LSMRTreeWithAntiMatterTuples(virtualBufferCache,
                 rtreeInteriorFrameFactory, rtreeLeafFrameFactory, btreeInteriorFrameFactory, btreeLeafFrameFactory,
                 fileNameManager, diskRTreeFactory, bulkLoadRTreeFactory, diskFileMapProvider, typeTraits.length,
diff --git a/hyracks/hyracks-storage-am-rtree/pom.xml b/hyracks/hyracks-storage-am-rtree/pom.xml
index edbf803..410ed6f 100644
--- a/hyracks/hyracks-storage-am-rtree/pom.xml
+++ b/hyracks/hyracks-storage-am-rtree/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -41,21 +41,21 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
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 5454832..528c004 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
@@ -860,8 +860,8 @@
     }
 
     @Override
-    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint)
-            throws TreeIndexException {
+    public IIndexBulkLoader createBulkLoader(float fillFactor, boolean verifyInput, long numElementsHint,
+            boolean checkIfEmptyIndex) throws TreeIndexException {
         // TODO: verifyInput currently does nothing.
         try {
             return new RTreeBulkLoader(fillFactor);
diff --git a/hyracks/hyracks-storage-common/pom.xml b/hyracks/hyracks-storage-common/pom.xml
index 519320f..349c223 100644
--- a/hyracks/hyracks-storage-common/pom.xml
+++ b/hyracks/hyracks-storage-common/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -41,7 +41,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-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/file/ILocalResourceRepository.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/ILocalResourceRepository.java
index e07a375..7ae2414 100644
--- 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
@@ -24,11 +24,11 @@
 
     public LocalResource getResourceByName(String name) throws HyracksDataException;
 
-    public void insert(LocalResource resource, int ioDeviceId) throws HyracksDataException;
+    public void insert(LocalResource resource) throws HyracksDataException;
 
-    public void deleteResourceById(long id, int ioDeviceId) throws HyracksDataException;
+    public void deleteResourceById(long id) throws HyracksDataException;
 
-    public void deleteResourceByName(String name, int ioDeviceId) 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/TransientLocalResourceRepository.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/TransientLocalResourceRepository.java
index f4fa440..63b71a3 100644
--- 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
@@ -37,7 +37,7 @@
     }
 
     @Override
-    public synchronized void insert(LocalResource resource, int ioDeviceId) throws HyracksDataException {
+    public synchronized void insert(LocalResource resource) throws HyracksDataException {
         long id = resource.getResourceId();
 
         if (id2ResourceMap.containsKey(id)) {
@@ -48,7 +48,7 @@
     }
 
     @Override
-    public synchronized void deleteResourceById(long id, int ioDeviceId) throws HyracksDataException {
+    public synchronized void deleteResourceById(long id) throws HyracksDataException {
         LocalResource resource = id2ResourceMap.get(id);
         if (resource == null) {
             throw new HyracksDataException("Resource doesn't exist");
@@ -58,7 +58,7 @@
     }
 
     @Override
-    public synchronized void deleteResourceByName(String name, int ioDeviceId) throws HyracksDataException {
+    public synchronized void deleteResourceByName(String name) throws HyracksDataException {
         LocalResource resource = name2ResourceMap.get(name);
         if (resource == null) {
             throw new HyracksDataException("Resource doesn't exist");
diff --git a/hyracks/hyracks-test-support/pom.xml b/hyracks/hyracks-test-support/pom.xml
index bc00394..d2e1697 100644
--- a/hyracks/hyracks-test-support/pom.xml
+++ b/hyracks/hyracks-test-support/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -41,33 +41,33 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-nc</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-rtree</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-lsm-invertedindex</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-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/AbstractSearchOperationCallbackTest.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/btree/AbstractSearchOperationCallbackTest.java
index 5bc7f28..02ce7f1 100644
--- 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
@@ -85,7 +85,7 @@
         private int blockingValue;
         private int expectedAfterBlock;
 
-        public SearchTask() {
+        public SearchTask() throws HyracksDataException {
             this.cb = new SynchronizingSearchOperationCallback();
             this.accessor = index.createAccessor(NoOpOperationCallback.INSTANCE, cb);
             this.cursor = accessor.createSearchCursor();
@@ -199,7 +199,7 @@
         private final ArrayTupleBuilder builder;
         private final ArrayTupleReference tuple;
 
-        public InsertionTask() {
+        public InsertionTask() throws HyracksDataException {
             this.accessor = index.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
             this.builder = new ArrayTupleBuilder(NUM_KEY_FIELDS);
             this.tuple = new ArrayTupleReference();
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 f36419c..54eac1e 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
@@ -62,9 +62,9 @@
         ctx.getIndex().deactivate();
         ctx.getIndex().destroy();
     }
-    
+
     @Override
     protected String getTestOpName() {
         return "BulkLoad";
     }
-}
+}
\ No newline at end of file
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 5b8f7d9..eafeff2 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
@@ -621,7 +621,7 @@
             LOGGER.info("Bulk loading " + ins + " tuples");
         }
         long start = System.currentTimeMillis();
-        IIndexBulkLoader bulkLoader = treeIndex.createBulkLoader(0.7f, false, ins);
+        IIndexBulkLoader bulkLoader = treeIndex.createBulkLoader(0.7f, false, ins, true);
         ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
         for (int i = 0; i < ins; i++) {
@@ -691,7 +691,7 @@
             treeIndex.activate();
 
             // Load sorted records, and expect to fail at tuple i.
-            IIndexBulkLoader bulkLoader = treeIndex.createBulkLoader(0.7f, true, ins);
+            IIndexBulkLoader bulkLoader = treeIndex.createBulkLoader(0.7f, true, ins, true);
             for (int j = 0; j < ins; j++) {
                 if (j > i) {
                     fail("Bulk load failure test unexpectedly succeeded past tuple: " + j);
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 62fd98b..85c7fa5 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
@@ -19,6 +19,7 @@
 import java.util.TreeSet;
 
 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.CheckTuple;
 import edu.uci.ics.hyracks.storage.am.common.IndexTestContext;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
@@ -28,17 +29,17 @@
 
     protected final TreeSet<CheckTuple> checkTuples = new TreeSet<CheckTuple>();
 
-    public OrderedIndexTestContext(ISerializerDeserializer[] fieldSerdes, IIndex index) {
+    public OrderedIndexTestContext(ISerializerDeserializer[] fieldSerdes, IIndex index) throws HyracksDataException {
         super(fieldSerdes, index);
     }
 
     public void upsertCheckTuple(CheckTuple checkTuple, Collection<CheckTuple> checkTuples) {
-    	if (checkTuples.contains(checkTuple)) {
+        if (checkTuples.contains(checkTuple)) {
             checkTuples.remove(checkTuple);
         }
         checkTuples.add(checkTuple);
     }
-    
+
     @Override
     public TreeSet<CheckTuple> getCheckTuples() {
         return checkTuples;
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
index 9f38d3a..3c8b740 100644
--- 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
@@ -35,7 +35,8 @@
 
     protected final IIndexAccessor indexAccessor;
 
-    public AbstractIndexTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches) {
+    public AbstractIndexTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches)
+            throws HyracksDataException {
         this.dataGen = dataGen;
         this.opSelector = opSelector;
         this.numBatches = numBatches;
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
index f56614e..65ed2ce 100644
--- 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
@@ -15,10 +15,11 @@
 
 package edu.uci.ics.hyracks.storage.am.common;
 
+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.datagen.DataGenThread;
 
 public interface IIndexTestWorkerFactory {
     public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index,
-            int numBatches);
+            int numBatches) throws HyracksDataException;
 }
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
index 0cb36d6..d8f9485 100644
--- 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
@@ -46,7 +46,7 @@
     }
 
     public long[] run(int numThreads, int numRepeats, int numOps, int batchSize) throws InterruptedException,
-            TreeIndexException {
+            TreeIndexException, HyracksDataException {
         int numBatches = numOps / batchSize;
         int threadNumBatches = numBatches / numThreads;
         if (threadNumBatches <= 0) {
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
index f91b1bf..339cd14 100644
--- 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
@@ -18,6 +18,7 @@
 import java.util.Collection;
 
 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.storage.am.common.api.IIndex;
@@ -31,7 +32,7 @@
     protected final ArrayTupleReference tuple = new ArrayTupleReference();
     protected final IIndexAccessor indexAccessor;
 
-    public IndexTestContext(ISerializerDeserializer[] fieldSerdes, IIndex index) {
+    public IndexTestContext(ISerializerDeserializer[] fieldSerdes, IIndex index) throws HyracksDataException {
         this.fieldSerdes = fieldSerdes;
         this.index = index;
         this.indexAccessor = (IIndexAccessor) index.createAccessor(TestOperationCallback.INSTANCE,
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 852a0b6..b5742b5 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
@@ -243,7 +243,7 @@
         ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
         // Perform bulk load.
-        IIndexBulkLoader bulkLoader = ctx.getIndex().createBulkLoader(0.7f, false, numTuples);
+        IIndexBulkLoader bulkLoader = ctx.getIndex().createBulkLoader(0.7f, false, numTuples, false);
         int c = 1;
         for (CheckTuple checkTuple : checkTuples) {
             if (LOGGER.isLoggable(Level.INFO)) {
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 e8d9c96..11adaa2 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
@@ -26,11 +26,9 @@
 public abstract class AbstractRTreeBulkLoadTest extends AbstractRTreeTestDriver {
 
     private final RTreeTestUtils rTreeTestUtils;
-    private final int bulkLoadRounds;
 
-    public AbstractRTreeBulkLoadTest(int bulkLoadRounds, boolean testRstarPolicy) {
+    public AbstractRTreeBulkLoadTest(boolean testRstarPolicy) {
         super(testRstarPolicy);
-        this.bulkLoadRounds = bulkLoadRounds;
         this.rTreeTestUtils = new RTreeTestUtils();
     }
 
@@ -41,19 +39,19 @@
         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.
-            if (fieldSerdes[0] instanceof IntegerSerializerDeserializer) {
-                rTreeTestUtils.bulkLoadIntTuples(ctx, numTuplesToInsert, getRandom());
-            } else if (fieldSerdes[0] instanceof DoubleSerializerDeserializer) {
-                rTreeTestUtils.bulkLoadDoubleTuples(ctx, numTuplesToInsert, getRandom());
-            }
 
-            rTreeTestUtils.checkScan(ctx);
-            rTreeTestUtils.checkDiskOrderScan(ctx);
-            rTreeTestUtils.checkRangeSearch(ctx, key);
+        // 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());
         }
+
+        rTreeTestUtils.checkScan(ctx);
+        rTreeTestUtils.checkDiskOrderScan(ctx);
+        rTreeTestUtils.checkRangeSearch(ctx, key);
+
         ctx.getIndex().deactivate();
         ctx.getIndex().destroy();
     }
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 50ff154..44ab0d9 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
@@ -709,7 +709,7 @@
             LOGGER.info("Bulk loading " + numInserts + " tuples");
         }
         long start = System.currentTimeMillis();
-        IIndexBulkLoader bulkLoader = treeIndex.createBulkLoader(0.7f, false, numInserts);
+        IIndexBulkLoader bulkLoader = treeIndex.createBulkLoader(0.7f, false, numInserts, true);
         ArrayTupleBuilder tb = new ArrayTupleBuilder(fieldCount);
         ArrayTupleReference tuple = new ArrayTupleReference();
 
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 135b306..77c0665 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
@@ -18,6 +18,7 @@
 import java.util.Collection;
 
 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.IndexTestContext;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.util.HashMultiSet;
@@ -25,8 +26,9 @@
 @SuppressWarnings("rawtypes")
 public abstract class AbstractRTreeTestContext extends IndexTestContext<RTreeCheckTuple> {
     private final HashMultiSet<RTreeCheckTuple> checkTuples = new HashMultiSet<RTreeCheckTuple>();
-	
-    public AbstractRTreeTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) {
+
+    public AbstractRTreeTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex)
+            throws HyracksDataException {
         super(fieldSerdes, treeIndex);
     }
 
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 756af98..9b77e23 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
@@ -21,6 +21,7 @@
 import edu.uci.ics.hyracks.api.context.IHyracksRootContext;
 import edu.uci.ics.hyracks.api.job.IJobSerializerDeserializerContainer;
 import edu.uci.ics.hyracks.api.messages.IMessageBroker;
+import edu.uci.ics.hyracks.api.resources.memory.IMemoryManager;
 
 public class TestNCApplicationContext implements INCApplicationContext {
     private final IHyracksRootContext rootCtx;
@@ -29,9 +30,32 @@
     private Serializable distributedState;
     private Object appObject;
 
+    private final IMemoryManager mm;
+
     public TestNCApplicationContext(IHyracksRootContext rootCtx, String nodeId) {
         this.rootCtx = rootCtx;
         this.nodeId = nodeId;
+        mm = new IMemoryManager() {
+            @Override
+            public long getMaximumMemory() {
+                return Long.MAX_VALUE;
+            }
+
+            @Override
+            public long getAvailableMemory() {
+                return Long.MAX_VALUE;
+            }
+
+            @Override
+            public void deallocate(long memory) {
+
+            }
+
+            @Override
+            public boolean allocate(long memory) {
+                return true;
+            }
+        };
     }
 
     @Override
@@ -67,14 +91,18 @@
 
     @Override
     public IMessageBroker getMessageBroker() {
-        // TODO Auto-generated method stub
         return null;
     }
 
+	@Override
+	public IJobSerializerDeserializerContainer getJobSerializerDeserializerContainer() {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
     @Override
-    public IJobSerializerDeserializerContainer getJobSerializerDeserializerContainer() {
-        // TODO Auto-generated method stub
-        return null;
+    public IMemoryManager getMemoryManager() {
+        return mm;
     }
 
     @Override
@@ -88,4 +116,4 @@
         // TODO Auto-generated method stub
 
     }
-}
\ No newline at end of file
+}
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/pom.xml b/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/pom.xml
index 09f7302..cacd829 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-am-bloomfilter-test/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-tests</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -46,14 +46,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-bloomfilter</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>test</scope>
   	</dependency>
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 b363aac..6fa8414 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-tests</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -48,14 +48,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-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/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 db74413..262e21c 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
@@ -40,7 +40,8 @@
     private final ArrayTupleBuilder deleteTb;
     private final ArrayTupleReference deleteTuple = new ArrayTupleReference();
 
-    public BTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches) {
+    public BTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches)
+            throws HyracksDataException {
         super(dataGen, opSelector, index, numBatches);
         btree = (BTree) index;
         numKeyFields = btree.getComparatorFactories().length;
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 039b1cf..a6d0425 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
@@ -15,6 +15,7 @@
 
 package edu.uci.ics.hyracks.storage.am.btree.multithread;
 
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 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;
@@ -23,8 +24,8 @@
 
 public class BTreeTestWorkerFactory implements IIndexTestWorkerFactory {
     @Override
-    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector,
-            IIndex index, int numBatches) {
+    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index,
+            int numBatches) throws HyracksDataException {
         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/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 a3b82ad..7aa6f18 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
@@ -18,6 +18,7 @@
 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.api.io.FileReference;
 import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
 import edu.uci.ics.hyracks.storage.am.btree.OrderedIndexTestContext;
@@ -30,7 +31,7 @@
 @SuppressWarnings("rawtypes")
 public class BTreeTestContext extends OrderedIndexTestContext {
 
-    public BTreeTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) {
+    public BTreeTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) throws HyracksDataException {
         super(fieldSerdes, treeIndex);
     }
 
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
index 466af51..83d382c 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-tests</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -39,20 +39,20 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-lsm-btree</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   </dependencies>
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
index ec4f7e2..e0a2a46 100644
--- 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
@@ -51,11 +51,10 @@
     @Override
     protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
             BTreeLeafFrameType leafType) throws Exception {
-        return LSMBTreeTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
-                fieldSerdes, numKeys, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider(),
-                harness.getIODeviceId());
+        return LSMBTreeTestContext.create(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, numKeys,
+                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(), harness.getOperationTracker(),
+                harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
index b294f39..122b788 100644
--- 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
@@ -51,11 +51,10 @@
     @Override
     protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
             BTreeLeafFrameType leafType) throws Exception {
-        return LSMBTreeTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
-                fieldSerdes, numKeys, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider(),
-                harness.getIODeviceId());
+        return LSMBTreeTestContext.create(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, numKeys,
+                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(), harness.getOperationTracker(),
+                harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
index afdd5cf..60e0492 100644
--- 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
@@ -34,11 +34,10 @@
     @Override
     protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories,
             int[] bloomFilterKeyFields) throws TreeIndexException {
-        return LSMBTreeUtils.createLSMTree(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), typeTraits,
-                cmpFactories, bloomFilterKeyFields, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider(),
-                harness.getIODeviceId());
+        return LSMBTreeUtils.createLSMTree(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), typeTraits, cmpFactories,
+                bloomFilterKeyFields, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
+                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Before
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
index ab5fa1f..76a0206 100644
--- 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
@@ -51,11 +51,10 @@
     @Override
     protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
             BTreeLeafFrameType leafType) throws Exception {
-        return LSMBTreeTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
-                fieldSerdes, numKeys, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider(),
-                harness.getIODeviceId());
+        return LSMBTreeTestContext.create(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, numKeys,
+                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(), harness.getOperationTracker(),
+                harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
index a10185d..639fd47 100644
--- 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
@@ -16,7 +16,6 @@
 
 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;
@@ -40,10 +39,8 @@
     @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;
-            }
+        if (!new FileReference(harness.getFileReference().getFile()).getFile().exists()) {
+            return false;
         }
         return true;
     }
@@ -56,11 +53,10 @@
     @Override
     public void setup() throws Exception {
         harness.setUp();
-        testCtx = LSMBTreeTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
-                fieldSerdes, fieldSerdes.length, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider(),
-                harness.getIODeviceId());
+        testCtx = LSMBTreeTestContext.create(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, fieldSerdes.length,
+                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(), harness.getOperationTracker(),
+                harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
         index = testCtx.getIndex();
     }
 
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
index b84397c..e3c86df 100644
--- 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
@@ -50,11 +50,10 @@
     @Override
     protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
             BTreeLeafFrameType leafType) throws Exception {
-        return LSMBTreeTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
-                fieldSerdes, numKeys, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider(),
-                harness.getIODeviceId());
+        return LSMBTreeTestContext.create(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, numKeys,
+                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(), harness.getOperationTracker(),
+                harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
index 97b5eb4..f7aa7f4 100644
--- 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
@@ -57,9 +57,15 @@
         for (int i = 0; i < maxTreesToMerge; i++) {
             for (int j = 0; j < i; j++) {
                 if (fieldSerdes[0] instanceof IntegerSerializerDeserializer) {
-                    orderedIndexTestUtils.bulkLoadIntTuples(ctx, numTuplesToInsert, getRandom());
+                    orderedIndexTestUtils.insertIntTuples(ctx, numTuplesToInsert, getRandom());
+                    // Deactivate and the re-activate the index to force it flush its in memory component
+                    ctx.getIndex().deactivate();
+                    ctx.getIndex().activate();
                 } else if (fieldSerdes[0] instanceof UTF8StringSerializerDeserializer) {
-                    orderedIndexTestUtils.bulkLoadStringTuples(ctx, numTuplesToInsert, getRandom());
+                    orderedIndexTestUtils.insertStringTuples(ctx, numTuplesToInsert, getRandom());
+                    // Deactivate and the re-activate the index to force it flush its in memory component
+                    ctx.getIndex().deactivate();
+                    ctx.getIndex().activate();
                 }
             }
 
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
index 0c5bf76..77b65ca 100644
--- 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
@@ -42,13 +42,13 @@
 
     @Override
     protected void createIndexInstance() throws Exception {
-        index = LSMBTreeUtils.createLSMTree(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
+        index = LSMBTreeUtils.createLSMTree(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
                 SerdeUtils.serdesToTypeTraits(keySerdes),
                 SerdeUtils.serdesToComparatorFactories(keySerdes, keySerdes.length), bloomFilterKeyFields,
                 harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
                 NoOpOperationTrackerProvider.INSTANCE.getOperationTracker(null), harness.getIOScheduler(),
-                harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
+                harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
index f0b230a..a7c8b81 100644
--- 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
@@ -52,15 +52,14 @@
     @Override
     protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
             BTreeLeafFrameType leafType) throws Exception {
-        return LSMBTreeTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
-                fieldSerdes, numKeys, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider(),
-                harness.getIODeviceId());
+        return LSMBTreeTestContext.create(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, numKeys,
+                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(), harness.getOperationTracker(),
+                harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
     protected Random getRandom() {
         return harness.getRandom();
     }
-}
+}
\ No newline at end of file
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
index e0db517..e15e80a 100644
--- 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
@@ -49,13 +49,13 @@
 
     @Override
     protected void createIndexInstance() throws Exception {
-        index = LSMBTreeUtils.createLSMTree(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
+        index = LSMBTreeUtils.createLSMTree(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
                 SerdeUtils.serdesToTypeTraits(keySerdes),
                 SerdeUtils.serdesToComparatorFactories(keySerdes, keySerdes.length), bloomFilterKeyFields,
                 harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
                 NoOpOperationTrackerProvider.INSTANCE.getOperationTracker(null), harness.getIOScheduler(),
-                harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
+                harness.getIOOperationCallbackProvider());
     }
 
     @Override
@@ -94,7 +94,7 @@
         private int expectedAfterBlock;
         private int expectedTupleToBeLockedValue;
 
-        public SearchTask() {
+        public SearchTask() throws HyracksDataException {
             this.cb = new SynchronizingSearchOperationCallback();
             this.accessor = index.createAccessor(NoOpOperationCallback.INSTANCE, cb);
             this.cursor = accessor.createSearchCursor();
@@ -210,7 +210,7 @@
         private final ArrayTupleBuilder builder;
         private final ArrayTupleReference tuple;
 
-        public InsertionTask() {
+        public InsertionTask() throws HyracksDataException {
             this.accessor = index.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
             this.builder = new ArrayTupleBuilder(NUM_KEY_FIELDS);
             this.tuple = new ArrayTupleReference();
@@ -222,11 +222,15 @@
             try {
                 insertTaskStarted = true;
 
-                // bulkload [101, 150] & [151, 200] as two separate disk components 
+                // bulkload [101, 150] and then insert [151, 200] and make sure it reaches disk, thus we will have two separate disk components 
                 // insert [50, 100] & [301, 350] to the in-memory component
                 // delete tuple 151
                 bulkloadIntTupleRange(101, 150);
-                bulkloadIntTupleRange(151, 200);
+                insertIntTupleRange(151, 200);
+                // Deactivate and the re-activate the index to force it flush its in memory component
+                index.deactivate();
+                index.activate();
+
                 insertIntTupleRange(50, 100);
                 insertIntTupleRange(301, 350);
                 int tupleTobeDeletedValue = 151;
@@ -270,7 +274,7 @@
                 throw new IllegalArgumentException("Invalid range: [" + begin + ", " + end + "]");
             }
 
-            IIndexBulkLoader bulkloader = index.createBulkLoader(1.0f, false, end - begin);
+            IIndexBulkLoader bulkloader = index.createBulkLoader(1.0f, false, end - begin, true);
             for (int i = begin; i <= end; i++) {
                 TupleUtils.createIntegerTuple(builder, tuple, i);
                 bulkloader.add(tuple);
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
index 59b837c..db221a2 100644
--- 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
@@ -51,11 +51,10 @@
     @Override
     protected OrderedIndexTestContext createTestContext(ISerializerDeserializer[] fieldSerdes, int numKeys,
             BTreeLeafFrameType leafType) throws Exception {
-        return LSMBTreeTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
-                fieldSerdes, numKeys, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider(),
-                harness.getIODeviceId());
+        return LSMBTreeTestContext.create(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, numKeys,
+                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(), harness.getOperationTracker(),
+                harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
index c5db1c1..9dfa713 100644
--- 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
@@ -50,11 +50,10 @@
     @Override
     protected ITreeIndex createIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories,
             int[] bloomFilterKeyFields) throws TreeIndexException {
-        return LSMBTreeUtils.createLSMTree(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), typeTraits,
-                cmpFactories, bloomFilterKeyFields, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider(),
-                harness.getIODeviceId());
+        return LSMBTreeUtils.createLSMTree(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), typeTraits, cmpFactories,
+                bloomFilterKeyFields, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
+                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
index 80165d7..8a37b4e 100644
--- 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
@@ -41,7 +41,8 @@
     private final ArrayTupleBuilder deleteTb;
     private final ArrayTupleReference deleteTuple = new ArrayTupleReference();
 
-    public LSMBTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches) {
+    public LSMBTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches)
+            throws HyracksDataException {
         super(dataGen, opSelector, index, numBatches);
         lsmBTree = (LSMBTree) index;
         numKeyFields = lsmBTree.getComparatorFactories().length;
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
index 6296fed..2015a66 100644
--- 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
@@ -15,6 +15,7 @@
 
 package edu.uci.ics.hyracks.storage.am.lsm.btree.multithread;
 
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 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;
@@ -23,8 +24,8 @@
 
 public class LSMBTreeTestWorkerFactory implements IIndexTestWorkerFactory {
     @Override
-    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector,
-            IIndex index, int numBatches) {
+    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index,
+            int numBatches) throws HyracksDataException {
         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
index d364955..52cbddb 100644
--- 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
@@ -37,7 +37,7 @@
     public long runExperiment(DataGenThread dataGen, int numThreads) throws Exception {
         btree.create();
         long start = System.currentTimeMillis();
-        IIndexBulkLoader bulkLoader = btree.createBulkLoader(1.0f, false, 0L);
+        IIndexBulkLoader bulkLoader = btree.createBulkLoader(1.0f, false, 0L, true);
         for (int i = 0; i < numBatches; i++) {
             TupleBatch batch = dataGen.tupleBatchQueue.take();
             for (int j = 0; j < batch.size(); j++) {
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
index 1307212..fc6642c 100644
--- 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
@@ -91,9 +91,9 @@
         IVirtualBufferCache virtualBufferCache = new VirtualBufferCache(new HeapBufferAllocator(), inMemPageSize,
                 inMemNumPages);
         this.ioScheduler = SynchronousScheduler.INSTANCE;
-        lsmtree = LSMBTreeUtils.createLSMTree(virtualBufferCache, ioManager, file, bufferCache, fmp, typeTraits,
-                cmpFactories, bloomFilterKeyFields, bloomFilterFalsePositiveRate, NoMergePolicy.INSTANCE,
-                new ThreadCountingTracker(), ioScheduler, NoOpIOOperationCallback.INSTANCE, ioDeviceId);
+        lsmtree = LSMBTreeUtils.createLSMTree(virtualBufferCache, file, bufferCache, fmp, typeTraits, cmpFactories,
+                bloomFilterKeyFields, bloomFilterFalsePositiveRate, NoMergePolicy.INSTANCE,
+                new ThreadCountingTracker(), ioScheduler, NoOpIOOperationCallback.INSTANCE);
     }
 
     @Override
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
index 5f8809b..ab78ee6 100644
--- 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
@@ -20,8 +20,8 @@
 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.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;
@@ -38,7 +38,7 @@
 @SuppressWarnings("rawtypes")
 public final class LSMBTreeTestContext extends OrderedIndexTestContext {
 
-    public LSMBTreeTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) {
+    public LSMBTreeTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) throws HyracksDataException {
         super(fieldSerdes, treeIndex);
     }
 
@@ -62,20 +62,20 @@
         upsertCheckTuple(checkTuple, checkTuples);
     }
 
-    public static LSMBTreeTestContext create(IVirtualBufferCache virtualBufferCache, IOManager ioManager,
-            FileReference file, IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider,
-            ISerializerDeserializer[] fieldSerdes, int numKeyFields, double bloomFilterFalsePositiveRate,
-            ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker, ILSMIOOperationScheduler ioScheduler,
-            ILSMIOOperationCallbackProvider ioOpCallbackProvider, int ioDeviceId) throws Exception {
+    public static LSMBTreeTestContext create(IVirtualBufferCache virtualBufferCache, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ISerializerDeserializer[] fieldSerdes,
+            int numKeyFields, double bloomFilterFalsePositiveRate, ILSMMergePolicy mergePolicy,
+            ILSMOperationTracker opTracker, 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(virtualBufferCache, ioManager, file, diskBufferCache,
-                diskFileMapProvider, typeTraits, cmpFactories, bloomFilterKeyFields, bloomFilterFalsePositiveRate,
-                mergePolicy, opTracker, ioScheduler, ioOpCallbackProvider, ioDeviceId);
+        LSMBTree lsmTree = LSMBTreeUtils.createLSMTree(virtualBufferCache, file, diskBufferCache, diskFileMapProvider,
+                typeTraits, cmpFactories, bloomFilterKeyFields, bloomFilterFalsePositiveRate, mergePolicy, opTracker,
+                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
index 94aa841..e643cf9 100644
--- 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
@@ -107,36 +107,36 @@
     }
 
     public void setUp() throws HyracksException {
-        onDiskDir = "lsm_btree_" + simpleDateFormat.format(new Date()) + sep;
+        ioManager = TestStorageManagerComponentHolder.getIOManager();
+        ioDeviceId = 0;
+        onDiskDir = ioManager.getIODevices().get(ioDeviceId).getPath() + sep + "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);
         virtualBufferCache = new VirtualBufferCache(new HeapBufferAllocator(), memPageSize, memNumPages);
-        ioManager = TestStorageManagerComponentHolder.getIOManager();
-        ioDeviceId = 0;
         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();
-                }
+        IODeviceHandle dev = ioManager.getIODevices().get(ioDeviceId);
+        File dir = new File(dev.getPath(), onDiskDir);
+        FilenameFilter filter = new FilenameFilter() {
+            public boolean accept(File dir, String name) {
+                return !name.startsWith(".");
             }
-            dir.delete();
+        };
+        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() {
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
index b180994..7a4dc6f 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-tests</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -39,14 +39,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-lsm-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
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
index 19bf21f..e4dd974 100644
--- 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
@@ -21,8 +21,6 @@
 
 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;
@@ -31,15 +29,15 @@
 
 public class DummyLSMIndexFileManager extends AbstractLSMIndexFileManager {
 
-    public DummyLSMIndexFileManager(IIOManager ioManager, IFileMapProvider fileMapProvider, FileReference file,
-            TreeIndexFactory<? extends ITreeIndex> treeFactory, int ioDeviceId) {
-        super(ioManager, fileMapProvider, file, treeFactory, ioDeviceId);
+    public DummyLSMIndexFileManager(IFileMapProvider fileMapProvider, FileReference file,
+            TreeIndexFactory<? extends ITreeIndex> treeFactory) {
+        super(fileMapProvider, file, treeFactory);
     }
 
-    protected void cleanupAndGetValidFilesInternal(IODeviceHandle dev, FilenameFilter filter,
+    protected void cleanupAndGetValidFilesInternal(FilenameFilter filter,
             TreeIndexFactory<? extends ITreeIndex> treeFactory, ArrayList<ComparableFileName> allFiles)
             throws HyracksDataException, IndexException {
-        File dir = new File(dev.getPath(), baseDir);
+        File dir = new File(baseDir);
         String[] files = dir.list(filter);
         for (String fileName : files) {
             File file = new File(dir.getPath() + File.separator + fileName);
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
index 5695eb8..d9fdeb3 100644
--- 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
@@ -61,7 +61,8 @@
         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;
+        baseDir = ioManager.getIODevices().get(DEFAULT_IO_DEVICE_ID).getPath() + sep + "lsm_tree"
+                + simpleDateFormat.format(new Date()) + sep;
         File f = new File(baseDir);
         f.mkdirs();
         file = new FileReference(f);
@@ -74,8 +75,7 @@
     }
 
     public void sortOrderTest(boolean testFlushFileName) throws InterruptedException, HyracksDataException {
-        ILSMIndexFileManager fileManager = new DummyLSMIndexFileManager(ioManager, fileMapProvider, file,
-                new DummyTreeFactory(), DEFAULT_IO_DEVICE_ID);
+        ILSMIndexFileManager fileManager = new DummyLSMIndexFileManager(fileMapProvider, file, new DummyTreeFactory());
         LinkedList<String> fileNames = new LinkedList<String>();
 
         int numFileNames = 100;
@@ -115,8 +115,7 @@
     }
 
     public void cleanInvalidFilesTest(IOManager ioManager) throws InterruptedException, IOException, IndexException {
-        ILSMIndexFileManager fileManager = new DummyLSMIndexFileManager(ioManager, fileMapProvider, file,
-                new DummyTreeFactory(), DEFAULT_IO_DEVICE_ID);
+        ILSMIndexFileManager fileManager = new DummyLSMIndexFileManager(fileMapProvider, file, new DummyTreeFactory());
         fileManager.createDirs();
 
         List<FileReference> flushFiles = new ArrayList<FileReference>();
@@ -190,7 +189,7 @@
 
         // Make sure invalid files were removed from the IODevices.
         ArrayList<String> remainingFiles = new ArrayList<String>();
-        File dir = new File(ioManager.getIODevices().get(DEFAULT_IO_DEVICE_ID).getPath(), baseDir);
+        File dir = new File(baseDir);
         FilenameFilter filter = new FilenameFilter() {
             public boolean accept(File dir, String name) {
                 return !name.startsWith(".");
@@ -218,7 +217,7 @@
     }
 
     private void cleanDirs(IOManager ioManager) {
-        File dir = new File(ioManager.getIODevices().get(DEFAULT_IO_DEVICE_ID).getPath(), baseDir);
+        File dir = new File(baseDir);
         FilenameFilter filter = new FilenameFilter() {
             public boolean accept(File dir, String name) {
                 return !name.startsWith(".");
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
index 45a5837..ba3e606 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/pom.xml
@@ -19,7 +19,7 @@
 	<parent>
 		<artifactId>hyracks-tests</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
@@ -40,21 +40,21 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-lsm-invertedindex</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-test-support</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>test</scope>
 		</dependency>
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
index e254fba..ee09f2f 100644
--- 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
@@ -21,6 +21,6 @@
 public class LSMInvertedIndexBulkLoadTest extends AbstractInvertedIndexLoadTest {
 
     public LSMInvertedIndexBulkLoadTest() {
-        super(InvertedIndexType.LSM, true, 1);
+        super(InvertedIndexType.LSM, true);
     }
 }
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
index 07afebe..748dd32 100644
--- 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
@@ -21,6 +21,6 @@
 public class LSMInvertedIndexInsertTest extends AbstractInvertedIndexLoadTest {
 
     public LSMInvertedIndexInsertTest() {
-        super(InvertedIndexType.LSM, false, 1);
+        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/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
index 8c0c597..5115b7e 100644
--- 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
@@ -34,7 +34,7 @@
     private final int maxTreesToMerge = AccessMethodTestsConfig.LSM_INVINDEX_MAX_TREES_TO_MERGE;
 
     public LSMInvertedIndexMergeTest() {
-        super(InvertedIndexType.LSM, true, 1);
+        super(InvertedIndexType.LSM, false);
     }
 
     @Override
@@ -48,11 +48,10 @@
 
         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);
-                }
+                LSMInvertedIndexTestUtils.insertIntoInvIndex(testCtx, tupleGen, NUM_DOCS_TO_INSERT);
+                // Deactivate and the re-activate the index to force it flush its in memory component
+                invIndex.deactivate();
+                invIndex.activate();
             }
             // Perform merge.
             invIndexAccessor.scheduleMerge(NoOpIOOperationCallback.INSTANCE);
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
deleted file mode 100644
index 0d8f59c..0000000
--- a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexMultiBulkLoadTest.java
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * 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.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/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
index 6c2da74..0f0345f 100644
--- 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
@@ -21,6 +21,6 @@
 public class PartitionedLSMInvertedIndexBulkLoadTest extends AbstractInvertedIndexLoadTest {
 
     public PartitionedLSMInvertedIndexBulkLoadTest() {
-        super(InvertedIndexType.PARTITIONED_LSM, true, 1);
+        super(InvertedIndexType.PARTITIONED_LSM, true);
     }
 }
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
index 7a93069..608f2fc 100644
--- 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
@@ -21,6 +21,6 @@
 public class PartitionedLSMInvertedIndexInsertTest extends AbstractInvertedIndexLoadTest {
 
     public PartitionedLSMInvertedIndexInsertTest() {
-        super(InvertedIndexType.PARTITIONED_LSM, false, 1);
+        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/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
index bccf27b..523557d 100644
--- 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
@@ -34,7 +34,7 @@
     private final int maxTreesToMerge = AccessMethodTestsConfig.LSM_INVINDEX_MAX_TREES_TO_MERGE;
 
     public PartitionedLSMInvertedIndexMergeTest() {
-        super(InvertedIndexType.PARTITIONED_LSM, true, 1);
+        super(InvertedIndexType.PARTITIONED_LSM, false);
     }
 
     @Override
@@ -48,11 +48,10 @@
 
         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);
-                }
+                LSMInvertedIndexTestUtils.insertIntoInvIndex(testCtx, tupleGen, NUM_DOCS_TO_INSERT);
+                // Deactivate and the re-activate the index to force it flush its in memory component
+                invIndex.deactivate();
+                invIndex.activate();
             }
             // Perform merge.
             invIndexAccessor.scheduleMerge(NoOpIOOperationCallback.INSTANCE);
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
deleted file mode 100644
index 71194f5..0000000
--- a/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexMultiBulkLoadTest.java
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * 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.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/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
index c3d6a16..8ccc203 100644
--- 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
@@ -29,12 +29,10 @@
 public abstract class AbstractInvertedIndexLoadTest extends AbstractInvertedIndexTest {
 
     protected final boolean bulkLoad;
-    protected final int numRounds;
 
-    public AbstractInvertedIndexLoadTest(InvertedIndexType invIndexType, boolean bulkLoad, int numRounds) {
+    public AbstractInvertedIndexLoadTest(InvertedIndexType invIndexType, boolean bulkLoad) {
         super(invIndexType);
         this.bulkLoad = bulkLoad;
-        this.numRounds = numRounds;
     }
 
     protected void runTest(LSMInvertedIndexTestContext testCtx, TupleGenerator tupleGen) throws IOException,
@@ -43,15 +41,13 @@
         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);
+        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();
@@ -59,7 +55,8 @@
 
     @Test
     public void wordTokensInvIndexTest() throws IOException, IndexException {
-        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createWordInvIndexTestContext(harness, invIndexType);
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createWordInvIndexTestContext(harness,
+                invIndexType);
         TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createStringDocumentTupleGen(harness.getRandom());
         runTest(testCtx, tupleGen);
     }
@@ -74,7 +71,8 @@
 
     @Test
     public void ngramTokensInvIndexTest() throws IOException, IndexException {
-        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createNGramInvIndexTestContext(harness, invIndexType);
+        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createNGramInvIndexTestContext(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/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
index 7407c24..7276464 100644
--- 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
@@ -108,7 +108,10 @@
     }
 
     public void setUp() throws HyracksException {
-        onDiskDir = "lsm_invertedindex_" + simpleDateFormat.format(new Date()) + sep;
+        ioManager = TestStorageManagerComponentHolder.getIOManager();
+        ioDeviceId = 0;
+        onDiskDir = ioManager.getIODevices().get(ioDeviceId).getPath() + sep + "lsm_invertedindex_"
+                + simpleDateFormat.format(new Date()) + sep;
         ctx = TestUtils.create(getHyracksFrameSize());
         TestStorageManagerComponentHolder.init(diskPageSize, diskNumPages, diskMaxOpenFiles);
         diskBufferCache = TestStorageManagerComponentHolder.getBufferCache(ctx);
@@ -117,30 +120,27 @@
                 memPageSize, memNumPages));
         virtualBufferCache.open();
         virtualFreePageManager = new VirtualFreePageManager(memNumPages);
-        ioManager = TestStorageManagerComponentHolder.getIOManager();
-        ioDeviceId = 0;
         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();
-                }
+        IODeviceHandle dev = ioManager.getIODevices().get(ioDeviceId);
+        File dir = new File(dev.getPath(), onDiskDir);
+        FilenameFilter filter = new FilenameFilter() {
+            public boolean accept(File dir, String name) {
+                return !name.startsWith(".");
             }
-            dir.delete();
+        };
+        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();
         virtualBufferCache.close();
     }
 
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
index bba0f36..8bc2817 100644
--- 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
@@ -21,6 +21,6 @@
 public class InMemoryInvertedIndexInsertTest extends AbstractInvertedIndexLoadTest {
     
     public InMemoryInvertedIndexInsertTest() {
-        super(InvertedIndexType.INMEMORY, false, 1);
+        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/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
index fa8eee0..46ea72c 100644
--- 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
@@ -21,6 +21,6 @@
 public class PartitionedInMemoryInvertedIndexInsertTest extends AbstractInvertedIndexLoadTest {
 
     public PartitionedInMemoryInvertedIndexInsertTest() {
-        super(InvertedIndexType.PARTITIONED_INMEMORY, false, 1);
+        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/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
index b4875a8..e1570af 100644
--- 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
@@ -50,7 +50,7 @@
             new ConjunctiveSearchModifier(), new JaccardSearchModifier(0.8f), new JaccardSearchModifier(0.5f) };
 
     public LSMInvertedIndexTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index,
-            int numBatches) {
+            int numBatches) throws HyracksDataException {
         super(dataGen, opSelector, index, numBatches);
         invIndex = (LSMInvertedIndex) index;
     }
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
index 6964f3d..c211edb 100644
--- 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
@@ -15,6 +15,7 @@
 
 package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.multithread;
 
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 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;
@@ -23,8 +24,8 @@
 
 public class LSMInvertedIndexWorkerFactory implements IIndexTestWorkerFactory {
     @Override
-    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector,
-            IIndex index, int numBatches) {
+    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index,
+            int numBatches) throws HyracksDataException {
         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/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
index fd90ad4..776b193 100644
--- 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
@@ -21,6 +21,6 @@
 public class OnDiskInvertedIndexBulkLoadTest extends AbstractInvertedIndexLoadTest {
 
     public OnDiskInvertedIndexBulkLoadTest() {
-        super(InvertedIndexType.ONDISK, true, 1);
+        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
index ad2b93a..6b9890d 100644
--- 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
@@ -21,6 +21,6 @@
 public class PartitionedOnDiskInvertedIndexBulkLoadTest extends AbstractInvertedIndexLoadTest {
 
     public PartitionedOnDiskInvertedIndexBulkLoadTest() {
-        super(InvertedIndexType.PARTITIONED_ONDISK, true, 1);
+        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/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
index 119226e..05dc1b5 100644
--- 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
@@ -63,7 +63,7 @@
 
     public LSMInvertedIndexTestContext(ISerializerDeserializer[] fieldSerdes, IIndex index,
             IBinaryTokenizerFactory tokenizerFactory, InvertedIndexType invIndexType,
-            InvertedIndexTokenizingTupleIterator indexTupleIter) {
+            InvertedIndexTokenizingTupleIterator indexTupleIter) throws HyracksDataException {
         super(fieldSerdes, index);
         invIndex = (IInvertedIndex) index;
         this.tokenizerFactory = tokenizerFactory;
@@ -97,7 +97,7 @@
 
     public static LSMInvertedIndexTestContext create(LSMInvertedIndexTestHarness harness,
             ISerializerDeserializer[] fieldSerdes, int tokenFieldCount, IBinaryTokenizerFactory tokenizerFactory,
-            InvertedIndexType invIndexType) throws IndexException {
+            InvertedIndexType invIndexType) throws IndexException, HyracksDataException {
         ITypeTraits[] allTypeTraits = SerdeUtils.serdesToTypeTraits(fieldSerdes);
         IBinaryComparatorFactory[] allCmpFactories = SerdeUtils.serdesToComparatorFactories(fieldSerdes,
                 fieldSerdes.length);
@@ -147,19 +147,19 @@
             case LSM: {
                 invIndex = InvertedIndexUtils.createLSMInvertedIndex(harness.getVirtualBufferCache(),
                         harness.getDiskFileMapProvider(), invListTypeTraits, invListCmpFactories, tokenTypeTraits,
-                        tokenCmpFactories, tokenizerFactory, harness.getDiskBufferCache(), harness.getIOManager(),
-                        harness.getOnDiskDir(), harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
+                        tokenCmpFactories, tokenizerFactory, harness.getDiskBufferCache(), harness.getOnDiskDir(),
+                        harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
                         harness.getOperationTracker(), harness.getIOScheduler(),
-                        harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
+                        harness.getIOOperationCallbackProvider());
                 break;
             }
             case PARTITIONED_LSM: {
                 invIndex = InvertedIndexUtils.createPartitionedLSMInvertedIndex(harness.getVirtualBufferCache(),
                         harness.getDiskFileMapProvider(), invListTypeTraits, invListCmpFactories, tokenTypeTraits,
-                        tokenCmpFactories, tokenizerFactory, harness.getDiskBufferCache(), harness.getIOManager(),
-                        harness.getOnDiskDir(), harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
+                        tokenCmpFactories, tokenizerFactory, harness.getDiskBufferCache(), harness.getOnDiskDir(),
+                        harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
                         harness.getOperationTracker(), harness.getIOScheduler(),
-                        harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
+                        harness.getIOOperationCallbackProvider());
                 break;
             }
             default: {
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
index fcbf133..c4e1ac5 100644
--- 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
@@ -205,7 +205,7 @@
         ISerializerDeserializer[] fieldSerdes = testCtx.getFieldSerdes();
 
         // Use the expected index to bulk-load the actual index.
-        IIndexBulkLoader bulkLoader = testCtx.getIndex().createBulkLoader(1.0f, false, numDocs);
+        IIndexBulkLoader bulkLoader = testCtx.getIndex().createBulkLoader(1.0f, false, numDocs, true);
         ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(testCtx.getFieldSerdes().length);
         ArrayTupleReference tuple = new ArrayTupleReference();
         Iterator<CheckTuple> checkTupleIter = tmpMemIndex.iterator();
@@ -493,7 +493,6 @@
         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.
@@ -511,7 +510,7 @@
             searchPred.setQueryTuple(searchDocument);
             searchPred.setQueryFieldIndex(0);
 
-            resultCursor.reset();
+            IIndexCursor resultCursor = accessor.createSearchCursor();
             boolean panic = false;
             try {
                 accessor.search(resultCursor, searchPred);
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
index 14863e5..3d4fece 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-tests</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -39,14 +39,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-lsm-rtree</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
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
index b9f652a..3fcb4e5 100644
--- 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
@@ -35,7 +35,7 @@
 public class LSMRTreeBulkLoadTest extends AbstractRTreeBulkLoadTest {
 
     public LSMRTreeBulkLoadTest() {
-        super(1, AccessMethodTestsConfig.LSM_RTREE_TEST_RSTAR_POLICY);
+        super(AccessMethodTestsConfig.LSM_RTREE_TEST_RSTAR_POLICY);
     }
 
     private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
@@ -54,12 +54,10 @@
     protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
             IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
             throws Exception {
-        return LSMRTreeTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
-                fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType,
-                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(),
-                harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
+        return LSMRTreeTestContext.create(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories,
+                numKeys, rtreePolicyType, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
+                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
index c4c5d00..467916e 100644
--- 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
@@ -54,12 +54,10 @@
     protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
             IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
             throws Exception {
-        return LSMRTreeTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
-                fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType,
-                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(),
-                harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
+        return LSMRTreeTestContext.create(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories,
+                numKeys, rtreePolicyType, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
+                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
index 0778269..a35170c 100644
--- 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
@@ -37,13 +37,12 @@
     protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
             IBinaryComparatorFactory[] btreeCmpFactories, IPrimitiveValueProviderFactory[] valueProviderFactories,
             RTreePolicyType rtreePolicyType) throws TreeIndexException {
-        return LSMRTreeUtils.createLSMTree(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), typeTraits,
-                rtreeCmpFactories, btreeCmpFactories, valueProviderFactories, rtreePolicyType,
-                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(),
+        return LSMRTreeUtils.createLSMTree(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), typeTraits, rtreeCmpFactories,
+                btreeCmpFactories, valueProviderFactories, rtreePolicyType, harness.getBoomFilterFalsePositiveRate(),
+                harness.getMergePolicy(), harness.getOperationTracker(), harness.getIOScheduler(),
                 harness.getIOOperationCallbackProvider(),
-                LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length), harness.getIODeviceId());
+                LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length));
     }
 
     @Before
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
index 33e0bca..44da0c0 100644
--- 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
@@ -54,12 +54,10 @@
     protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
             IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
             throws Exception {
-        return LSMRTreeTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
-                fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType,
-                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(),
-                harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
+        return LSMRTreeTestContext.create(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories,
+                numKeys, rtreePolicyType, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
+                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
index 5da1fe0..b97bebb 100644
--- 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
@@ -16,7 +16,6 @@
 
 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;
@@ -50,10 +49,8 @@
     @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;
-            }
+        if (!new FileReference(harness.getFileReference().getFile()).getFile().exists()) {
+            return false;
         }
         return true;
     }
@@ -66,11 +63,10 @@
     @Override
     public void setup() throws Exception {
         harness.setUp();
-        testCtx = LSMRTreeTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
-                fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RTREE,
-                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(), harness.getOperationTracker(),
-                harness.getIOScheduler(), harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
+        testCtx = LSMRTreeTestContext.create(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories,
+                numKeys, RTreePolicyType.RTREE, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
+                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
         index = testCtx.getIndex();
     }
 
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
index 42fde48..b13ce4d 100644
--- 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
@@ -53,12 +53,10 @@
     protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
             IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
             throws Exception {
-        return LSMRTreeTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
-                fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType,
-                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(),
-                harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
+        return LSMRTreeTestContext.create(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories,
+                numKeys, rtreePolicyType, harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
+                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
index 4cde8d2..18528c4 100644
--- 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
@@ -59,9 +59,15 @@
         for (int i = 0; i < maxTreesToMerge; i++) {
             for (int j = 0; j < i; j++) {
                 if (fieldSerdes[0] instanceof IntegerSerializerDeserializer) {
-                    rTreeTestUtils.bulkLoadIntTuples(ctx, numTuplesToInsert, getRandom());
+                    rTreeTestUtils.insertIntTuples(ctx, numTuplesToInsert, getRandom());
+                    // Deactivate and the re-activate the index to force it flush its in memory component
+                    ctx.getIndex().deactivate();
+                    ctx.getIndex().activate();
                 } else if (fieldSerdes[0] instanceof DoubleSerializerDeserializer) {
-                    rTreeTestUtils.bulkLoadDoubleTuples(ctx, numTuplesToInsert, getRandom());
+                    rTreeTestUtils.insertDoubleTuples(ctx, numTuplesToInsert, getRandom());
+                    // Deactivate and the re-activate the index to force it flush its in memory component
+                    ctx.getIndex().deactivate();
+                    ctx.getIndex().activate();
                 }
             }
 
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
deleted file mode 100644
index 6796546..0000000
--- a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeMultiBulkLoadTest.java
+++ /dev/null
@@ -1,69 +0,0 @@
-/*
- * 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.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.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
-                fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType,
-                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(),
-                harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
-    }
-
-    @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
index cf33d05..2baf485 100644
--- 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
@@ -35,7 +35,7 @@
 public class LSMRTreeWithAntiMatterTuplesBulkLoadTest extends AbstractRTreeBulkLoadTest {
 
     public LSMRTreeWithAntiMatterTuplesBulkLoadTest() {
-        super(1, AccessMethodTestsConfig.LSM_RTREE_TEST_RSTAR_POLICY);
+        super(AccessMethodTestsConfig.LSM_RTREE_TEST_RSTAR_POLICY);
     }
 
     private final LSMRTreeTestHarness harness = new LSMRTreeTestHarness();
@@ -54,11 +54,10 @@
     protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
             IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
             throws Exception {
-        return LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
+        return LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getVirtualBufferCache(),
                 harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
                 fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType, harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(),
-                harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
+                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
index 7be02f3..9c440cc 100644
--- 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
@@ -54,11 +54,10 @@
     protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
             IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
             throws Exception {
-        return LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
+        return LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getVirtualBufferCache(),
                 harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
                 fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType, harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(),
-                harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
+                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
index 71d6c1c..909d0cd 100644
--- 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
@@ -37,12 +37,12 @@
     protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
             IBinaryComparatorFactory[] btreeCmpFactories, IPrimitiveValueProviderFactory[] valueProviderFactories,
             RTreePolicyType rtreePolicyType) throws TreeIndexException {
-        return LSMRTreeUtils.createLSMTreeWithAntiMatterTuples(harness.getVirtualBufferCache(), harness.getIOManager(),
+        return LSMRTreeUtils.createLSMTreeWithAntiMatterTuples(harness.getVirtualBufferCache(),
                 harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), typeTraits,
                 rtreeCmpFactories, btreeCmpFactories, valueProviderFactories, rtreePolicyType,
                 harness.getMergePolicy(), harness.getOperationTracker(), harness.getIOScheduler(),
                 harness.getIOOperationCallbackProvider(),
-                LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length), harness.getIODeviceId());
+                LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length));
     }
 
     @Before
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
index ad502c7..6b35192 100644
--- 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
@@ -54,11 +54,10 @@
     protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
             IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
             throws Exception {
-        return LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
+        return LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getVirtualBufferCache(),
                 harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
                 fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType, harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(),
-                harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
+                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
index 44c1966..6dcbdf2 100644
--- 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
@@ -16,7 +16,6 @@
 
 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;
@@ -50,10 +49,8 @@
     @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;
-            }
+        if (!new FileReference(harness.getFileReference().getFile()).getFile().exists()) {
+            return false;
         }
         return true;
     }
@@ -67,10 +64,9 @@
     public void setup() throws Exception {
         harness.setUp();
         testCtx = LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getVirtualBufferCache(),
-                harness.getIOManager(), harness.getFileReference(), harness.getDiskBufferCache(),
-                harness.getDiskFileMapProvider(), fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RTREE,
-                harness.getMergePolicy(), harness.getOperationTracker(), harness.getIOScheduler(),
-                harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
+                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
+                fieldSerdes, valueProviderFactories, numKeys, RTreePolicyType.RTREE, harness.getMergePolicy(),
+                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
         index = testCtx.getIndex();
     }
 
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
index 16a9679..dc81fc3 100644
--- 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
@@ -53,11 +53,10 @@
     protected AbstractRTreeTestContext createTestContext(ISerializerDeserializer[] fieldSerdes,
             IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeys, RTreePolicyType rtreePolicyType)
             throws Exception {
-        return LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getVirtualBufferCache(), harness.getIOManager(),
+        return LSMRTreeWithAntiMatterTuplesTestContext.create(harness.getVirtualBufferCache(),
                 harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
                 fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType, harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(),
-                harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
+                harness.getOperationTracker(), harness.getIOScheduler(), harness.getIOOperationCallbackProvider());
     }
 
     @Override
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
deleted file mode 100644
index c91948e..0000000
--- a/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/edu/uci/ics/hyracks/storage/am/lsm/rtree/LSMRTreeWithAntiMatterTuplesMultiBulkLoadTest.java
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * 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.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.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(),
-                fieldSerdes, valueProviderFactories, numKeys, rtreePolicyType, harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(),
-                harness.getIOOperationCallbackProvider(), harness.getIODeviceId());
-    }
-
-    @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
index 8bf2edd..710d181 100644
--- 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
@@ -36,7 +36,7 @@
     protected final ArrayTupleReference rearrangedTuple = new ArrayTupleReference();
 
     public AbstractLSMRTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index,
-            int numBatches) {
+            int numBatches) throws HyracksDataException {
         super(dataGen, opSelector, index, numBatches);
         lsmRTree = (ITreeIndex) index;
         numFields = lsmRTree.getFieldCount();
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
index 8c6c305..850d540 100644
--- 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
@@ -57,13 +57,12 @@
     protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
             IBinaryComparatorFactory[] btreeCmpFactories, IPrimitiveValueProviderFactory[] valueProviderFactories,
             RTreePolicyType rtreePolicyType) throws TreeIndexException {
-        return LSMRTreeUtils.createLSMTree(harness.getVirtualBufferCache(), harness.getIOManager(),
-                harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), typeTraits,
-                rtreeCmpFactories, btreeCmpFactories, valueProviderFactories, rtreePolicyType,
-                harness.getBoomFilterFalsePositiveRate(), harness.getMergePolicy(),
-                harness.getOperationTracker(), harness.getIOScheduler(),
+        return LSMRTreeUtils.createLSMTree(harness.getVirtualBufferCache(), harness.getFileReference(),
+                harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), typeTraits, rtreeCmpFactories,
+                btreeCmpFactories, valueProviderFactories, rtreePolicyType, harness.getBoomFilterFalsePositiveRate(),
+                harness.getMergePolicy(), harness.getOperationTracker(), harness.getIOScheduler(),
                 harness.getIOOperationCallbackProvider(),
-                LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length), harness.getIODeviceId());
+                LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length));
     }
 
     @Override
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
index 09de3a3..b3fddc8 100644
--- 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
@@ -39,7 +39,8 @@
     private final ArrayTupleBuilder rearrangedTb;
     private final ArrayTupleReference rearrangedTuple = new ArrayTupleReference();
 
-    public LSMRTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches) {
+    public LSMRTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches)
+            throws HyracksDataException {
         super(dataGen, opSelector, index, numBatches);
         lsmRTree = (LSMRTree) index;
         numFields = lsmRTree.getFieldCount();
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
index 2b2d72c..2df1747 100644
--- 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
@@ -15,6 +15,7 @@
 
 package edu.uci.ics.hyracks.storage.am.lsm.rtree.multithread;
 
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 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;
@@ -23,8 +24,8 @@
 
 public class LSMRTreeTestWorkerFactory implements IIndexTestWorkerFactory {
     @Override
-    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector,
-            IIndex index, int numBatches) {
+    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index,
+            int numBatches) throws HyracksDataException {
         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
index d9e4658..4a6b462 100644
--- 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
@@ -57,12 +57,12 @@
     protected ITreeIndex createTreeIndex(ITypeTraits[] typeTraits, IBinaryComparatorFactory[] rtreeCmpFactories,
             IBinaryComparatorFactory[] btreeCmpFactories, IPrimitiveValueProviderFactory[] valueProviderFactories,
             RTreePolicyType rtreePolicyType) throws TreeIndexException {
-        return LSMRTreeUtils.createLSMTreeWithAntiMatterTuples(harness.getVirtualBufferCache(), harness.getIOManager(),
+        return LSMRTreeUtils.createLSMTreeWithAntiMatterTuples(harness.getVirtualBufferCache(),
                 harness.getFileReference(), harness.getDiskBufferCache(), harness.getDiskFileMapProvider(), typeTraits,
                 rtreeCmpFactories, btreeCmpFactories, valueProviderFactories, rtreePolicyType,
                 harness.getMergePolicy(), harness.getOperationTracker(), harness.getIOScheduler(),
                 harness.getIOOperationCallbackProvider(),
-                LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length), harness.getIODeviceId());
+                LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length));
 
     }
 
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
index c27158f..12d7742 100644
--- 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
@@ -31,7 +31,7 @@
 public class LSMRTreeWithAntiMatterTuplesTestWorker extends AbstractLSMRTreeTestWorker {
 
     public LSMRTreeWithAntiMatterTuplesTestWorker(DataGenThread dataGen, TestOperationSelector opSelector,
-            IIndex index, int numBatches) {
+            IIndex index, int numBatches) throws HyracksDataException {
         super(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/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
index 67d9c27..cf3ac02 100644
--- 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
@@ -15,6 +15,7 @@
 
 package edu.uci.ics.hyracks.storage.am.lsm.rtree.multithread;
 
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 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;
@@ -23,8 +24,8 @@
 
 public class LSMRTreeWithAntiMatterTuplesTestWorkerFactory implements IIndexTestWorkerFactory {
     @Override
-    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector,
-            IIndex index, int numBatches) {
+    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index,
+            int numBatches) throws HyracksDataException {
         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
index fe2cc9e..8c59e31 100644
--- 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
@@ -20,8 +20,8 @@
 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.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.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
@@ -41,7 +41,7 @@
 @SuppressWarnings("rawtypes")
 public final class LSMRTreeTestContext extends AbstractRTreeTestContext {
 
-    public LSMRTreeTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) {
+    public LSMRTreeTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) throws HyracksDataException {
         super(fieldSerdes, treeIndex);
     }
 
@@ -66,22 +66,21 @@
         return lsmTree.getComparatorFactories();
     }
 
-    public static LSMRTreeTestContext create(IVirtualBufferCache virtualBufferCache, IOManager ioManager,
-            FileReference file, IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider,
-            ISerializerDeserializer[] fieldSerdes, IPrimitiveValueProviderFactory[] valueProviderFactories,
-            int numKeyFields, RTreePolicyType rtreePolicyType, double bloomFilterFalsePositiveRate,
-            ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker, ILSMIOOperationScheduler ioScheduler,
-            ILSMIOOperationCallbackProvider ioOpCallbackProvider, int ioDeviceId) throws Exception {
+    public static LSMRTreeTestContext create(IVirtualBufferCache virtualBufferCache, FileReference file,
+            IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider, ISerializerDeserializer[] fieldSerdes,
+            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeyFields, RTreePolicyType rtreePolicyType,
+            double bloomFilterFalsePositiveRate, ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker,
+            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(virtualBufferCache, ioManager, file, diskBufferCache,
-                diskFileMapProvider, typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories,
-                rtreePolicyType, bloomFilterFalsePositiveRate, mergePolicy, opTracker, ioScheduler,
-                ioOpCallbackProvider, LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length),
-                ioDeviceId);
+        LSMRTree lsmTree = LSMRTreeUtils.createLSMTree(virtualBufferCache, file, diskBufferCache, diskFileMapProvider,
+                typeTraits, rtreeCmpFactories, btreeCmpFactories, valueProviderFactories, rtreePolicyType,
+                bloomFilterFalsePositiveRate, mergePolicy, opTracker, 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
index 3382318..118b1bc 100644
--- 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
@@ -104,35 +104,34 @@
     }
 
     public void setUp() throws HyracksException {
-        onDiskDir = "lsm_rtree_" + simpleDateFormat.format(new Date()) + sep;
+        ioManager = TestStorageManagerComponentHolder.getIOManager();
+        ioDeviceId = 0;
+        onDiskDir = ioManager.getIODevices().get(ioDeviceId).getPath() + sep + "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);
         virtualBufferCache = new VirtualBufferCache(new HeapBufferAllocator(), memPageSize, memNumPages);
-        ioManager = TestStorageManagerComponentHolder.getIOManager();
-        ioDeviceId = 0;
         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();
-                }
+        IODeviceHandle dev = ioManager.getIODevices().get(ioDeviceId);
+        File dir = new File(dev.getPath(), onDiskDir);
+        FilenameFilter filter = new FilenameFilter() {
+            public boolean accept(File dir, String name) {
+                return !name.startsWith(".");
             }
-            dir.delete();
+        };
+        String[] files = dir.list(filter);
+        if (files != null) {
+            for (String fileName : files) {
+                File file = new File(dir.getPath() + File.separator + fileName);
+                file.delete();
+            }
         }
     }
 
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
index b1f4d8f..95716f6 100644
--- 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
@@ -20,8 +20,8 @@
 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.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.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
@@ -41,7 +41,8 @@
 @SuppressWarnings("rawtypes")
 public final class LSMRTreeWithAntiMatterTuplesTestContext extends AbstractRTreeTestContext {
 
-    public LSMRTreeWithAntiMatterTuplesTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) {
+    public LSMRTreeWithAntiMatterTuplesTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex)
+            throws HyracksDataException {
         super(fieldSerdes, treeIndex);
     }
 
@@ -67,21 +68,20 @@
     }
 
     public static LSMRTreeWithAntiMatterTuplesTestContext create(IVirtualBufferCache virtualBufferCache,
-            IOManager ioManager, FileReference file, IBufferCache diskBufferCache,
-            IFileMapProvider diskFileMapProvider, ISerializerDeserializer[] fieldSerdes,
-            IPrimitiveValueProviderFactory[] valueProviderFactories, int numKeyFields, RTreePolicyType rtreePolicyType,
-            ILSMMergePolicy mergePolicy, ILSMOperationTracker opTracker, ILSMIOOperationScheduler ioScheduler,
-            ILSMIOOperationCallbackProvider ioOpCallbackProvider, int ioDeviceId) throws Exception {
+            FileReference file, IBufferCache diskBufferCache, IFileMapProvider diskFileMapProvider,
+            ISerializerDeserializer[] fieldSerdes, IPrimitiveValueProviderFactory[] valueProviderFactories,
+            int numKeyFields, RTreePolicyType rtreePolicyType, ILSMMergePolicy mergePolicy,
+            ILSMOperationTracker opTracker, 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(virtualBufferCache,
-                ioManager, file, diskBufferCache, diskFileMapProvider, typeTraits, rtreeCmpFactories,
-                btreeCmpFactories, valueProviderFactories, rtreePolicyType, mergePolicy, opTracker, ioScheduler,
-                ioOpCallbackProvider, LSMRTreeUtils.proposeBestLinearizer(typeTraits, rtreeCmpFactories.length),
-                ioDeviceId);
+                file, diskBufferCache, diskFileMapProvider, typeTraits, rtreeCmpFactories, btreeCmpFactories,
+                valueProviderFactories, rtreePolicyType, mergePolicy, opTracker, 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 8c5178e..547a3a4 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-tests</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -48,14 +48,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-rtree</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-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 7f42223..4b68ddc 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
@@ -32,7 +32,7 @@
 public class RTreeBulkLoadTest extends AbstractRTreeBulkLoadTest {
 
     public RTreeBulkLoadTest() {
-        super(1, AccessMethodTestsConfig.RTREE_TEST_RSTAR_POLICY);
+        super(AccessMethodTestsConfig.RTREE_TEST_RSTAR_POLICY);
     }
 
     private final RTreeTestHarness harness = new RTreeTestHarness();
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 cf118a3..bc5d331 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
@@ -38,7 +38,8 @@
     private final ArrayTupleReference rearrangedTuple = new ArrayTupleReference();
     private final ArrayTupleBuilder rearrangedTb;
 
-    public RTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches) {
+    public RTreeTestWorker(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index, int numBatches)
+            throws HyracksDataException {
         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 a1f2155..4d06601 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
@@ -15,6 +15,7 @@
 
 package edu.uci.ics.hyracks.storage.am.rtree.multithread;
 
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 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;
@@ -23,8 +24,8 @@
 
 public class RTreeTestWorkerFactory implements IIndexTestWorkerFactory {
     @Override
-    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector,
-            IIndex index, int numBatches) {
+    public AbstractIndexTestWorker create(DataGenThread dataGen, TestOperationSelector opSelector, IIndex index,
+            int numBatches) throws HyracksDataException {
         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 97ac221..5968fe9 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
@@ -18,6 +18,7 @@
 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.api.io.FileReference;
 import edu.uci.ics.hyracks.dataflow.common.util.SerdeUtils;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
@@ -32,7 +33,7 @@
 @SuppressWarnings("rawtypes")
 public class RTreeTestContext extends AbstractRTreeTestContext {
 
-    public RTreeTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) {
+    public RTreeTestContext(ISerializerDeserializer[] fieldSerdes, ITreeIndex treeIndex) throws HyracksDataException {
         super(fieldSerdes, treeIndex);
     }
 
diff --git a/hyracks/hyracks-tests/hyracks-storage-common-test/pom.xml b/hyracks/hyracks-tests/hyracks-storage-common-test/pom.xml
index 0930280..d9fdc26 100644
--- a/hyracks/hyracks-tests/hyracks-storage-common-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-common-test/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-tests</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -48,13 +48,13 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-common</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.7-SNAPSHOT</version>
+  		<version>0.2.10-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-tests/pom.xml b/hyracks/hyracks-tests/pom.xml
index 2990e53..441b76c 100644
--- a/hyracks/hyracks-tests/pom.xml
+++ b/hyracks/hyracks-tests/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.7-SNAPSHOT</version>
+    <version>0.2.10-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/pom.xml b/hyracks/pom.xml
index 6282fdd..a4a54f2 100644
--- a/hyracks/pom.xml
+++ b/hyracks/pom.xml
@@ -17,7 +17,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks</artifactId>
-  <version>0.2.7-SNAPSHOT</version>
+  <version>0.2.10-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>hyracks</name>
 
diff --git a/pom.xml b/pom.xml
index 3428836..a851758 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,7 +17,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>fullstack</artifactId>
-  <version>0.2.7-SNAPSHOT</version>
+  <version>0.2.10-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>hyracks-ecosystem-full-stack</name>
 
diff --git a/pregelix/build.sh b/pregelix/build.sh
new file mode 100644
index 0000000..e213181
--- /dev/null
+++ b/pregelix/build.sh
@@ -0,0 +1,12 @@
+rm -rf dist
+mkdir dist
+
+hadoop_versions=(0.20.2 0.23.1 0.23.6 1.0.4 cdh-4.1 cdh-4.2)
+cd ../
+for v in ${hadoop_versions[@]}
+do
+   #echo mvn clean package -DskipTests=true -Dhadoop=${v}
+   mvn clean package -DskipTests=true -Dhadoop=${v}
+   #echo mv pregelix/pregelix-dist/target/pregelix-dist-*-binary-assembly.zip pregelix/dist/pregelix-dist-binary-assembley-hdfs-${v}.zip
+   mv pregelix/pregelix-dist/target/pregelix-dist-*-binary-assembly.zip pregelix/dist/pregelix-dist-binary-assembley-hdfs-${v}.zip
+done
diff --git a/pregelix/pom.xml b/pregelix/pom.xml
index c0c3822..de5ef3b 100644
--- a/pregelix/pom.xml
+++ b/pregelix/pom.xml
@@ -17,7 +17,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>pregelix</artifactId>
-  <version>0.2.7-SNAPSHOT</version>
+  <version>0.2.10-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>pregelix</name>
 
diff --git a/pregelix/pregelix-api/pom.xml b/pregelix/pregelix-api/pom.xml
index 305b50c..0152a15 100644
--- a/pregelix/pregelix-api/pom.xml
+++ b/pregelix/pregelix-api/pom.xml
@@ -21,7 +21,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 
 	<properties>
@@ -82,7 +82,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -95,7 +95,7 @@
 		<dependency>
                         <groupId>edu.uci.ics.hyracks</groupId>
                         <artifactId>hyracks-hdfs-core</artifactId>
-                        <version>0.2.7-SNAPSHOT</version>
+                        <version>0.2.10-SNAPSHOT</version>
                         <type>jar</type>
                         <scope>compile</scope>
                 </dependency>
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/GlobalAggregator.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/GlobalAggregator.java
index 08c7151..5ea6413 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/GlobalAggregator.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/GlobalAggregator.java
@@ -20,6 +20,7 @@
 import org.apache.hadoop.io.WritableComparable;
 
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.pregelix.api.io.WritableSizable;
 
 /**
  * This is the abstract class to implement for aggregating the state of all the vertices globally in the graph.
@@ -39,7 +40,7 @@
  */
 
 @SuppressWarnings("rawtypes")
-public abstract class GlobalAggregator<I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable, P extends Writable, F extends Writable> {
+public abstract class GlobalAggregator<I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable, P extends Writable, F extends Writable> {
     /**
      * initialize aggregator
      */
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/MessageCombiner.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/MessageCombiner.java
index f5daf99..fa03c0c 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/MessageCombiner.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/MessageCombiner.java
@@ -19,6 +19,7 @@
 import org.apache.hadoop.io.WritableComparable;
 
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.pregelix.api.io.WritableSizable;
 
 /**
  * This is the abstract class to implement for combining of messages that are sent to the same vertex.
@@ -36,7 +37,7 @@
  *        the type of the partially combined messages
  */
 @SuppressWarnings("rawtypes")
-public abstract class MessageCombiner<I extends WritableComparable, M extends Writable, P extends Writable> {
+public abstract class MessageCombiner<I extends WritableComparable, M extends WritableSizable, P extends Writable> {
 
     /**
      * initialize combiner
@@ -82,4 +83,36 @@
      * @return the final message List
      */
     public abstract MsgList<M> finishFinal();
+
+    /**
+     * init the combiner for all segmented bags for one key
+     * 
+     * @return the final message List
+     */
+    public void initAll(MsgList providedMsgList) {
+        init(providedMsgList);
+    }
+
+    /**
+     * finish final combiner for all segmented bags for one key
+     * 
+     * @return the final message List
+     */
+    public MsgList<M> finishFinalAll() {
+        return finishFinal();
+    }
+
+    /**
+     * @return the accumulated byte size
+     */
+    public int estimateAccumulatedStateByteSizePartial(I vertexIndex, M msg) throws HyracksDataException {
+        return 0;
+    }
+
+    /**
+     * @return the accumulated byte size
+     */
+    public int estimateAccumulatedStateByteSizeFinal(I vertexIndex, P partialAggregate) throws HyracksDataException {
+        return 0;
+    }
 }
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/MsgList.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/MsgList.java
index 104f396..51b62e4 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/MsgList.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/MsgList.java
@@ -15,8 +15,11 @@
 
 package edu.uci.ics.pregelix.api.graph;
 
-import org.apache.hadoop.io.Writable;
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
 
+import edu.uci.ics.pregelix.api.io.WritableSizable;
 import edu.uci.ics.pregelix.api.util.ArrayListWritable;
 import edu.uci.ics.pregelix.api.util.BspUtils;
 
@@ -27,9 +30,11 @@
  * @param <M>
  *            message type
  */
-public class MsgList<M extends Writable> extends ArrayListWritable<M> {
+public class MsgList<M extends WritableSizable> extends ArrayListWritable<M> {
     /** Defining a layout version for a serializable class. */
     private static final long serialVersionUID = 1L;
+    private byte start = 1;
+    private byte end = 2;
 
     /**
      * Default constructor.s
@@ -43,4 +48,34 @@
     public void setClass() {
         setClass((Class<M>) BspUtils.getMessageValueClass(getConf()));
     }
+
+    @Override
+    public void write(DataOutput output) throws IOException {
+        output.writeByte(start | end);
+        super.write(output);
+    }
+
+    @Override
+    public void readFields(DataInput input) throws IOException {
+        byte startEnd = input.readByte();
+        this.start = (byte) (startEnd & 1);
+        this.end = (byte) (startEnd & 2);
+        super.readFields(input);
+    }
+
+    public final void setSegmentStart(boolean segStart) {
+        this.start = (byte) (segStart ? 1 : 0);
+    }
+
+    public final void setSegmentEnd(boolean segEnd) {
+        this.end = (byte) (segEnd ? 2 : 0);
+    }
+
+    public boolean segmentStart() {
+        return start == 1 ? true : false;
+    }
+
+    public boolean segmentEnd() {
+        return end == 2 ? true : false;
+    }
 }
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 7c91c02..c52130d 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
@@ -24,6 +24,7 @@
 import java.util.List;
 import java.util.Map;
 
+import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.io.Writable;
 import org.apache.hadoop.io.WritableComparable;
 import org.apache.hadoop.mapreduce.TaskAttemptContext;
@@ -31,7 +32,9 @@
 import edu.uci.ics.hyracks.api.comm.IFrameWriter;
 import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
 import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
+import edu.uci.ics.pregelix.api.io.WritableSizable;
 import edu.uci.ics.pregelix.api.util.BspUtils;
+import edu.uci.ics.pregelix.api.util.JobStateUtils;
 import edu.uci.ics.pregelix.api.util.SerDeUtils;
 
 /**
@@ -48,7 +51,7 @@
  *            Message value type
  */
 @SuppressWarnings("rawtypes")
-public abstract class Vertex<I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable>
+public abstract class Vertex<I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable>
         implements Writable {
     private static long superstep = 0;
     /** Class-wide number of vertices */
@@ -75,6 +78,8 @@
     private boolean hasMessage = false;
     /** created new vertex */
     private boolean createdNewLiveVertex = false;
+    /** terminate the partition */
+    private boolean terminatePartition = false;
 
     /**
      * use object pool for re-using objects
@@ -87,12 +92,23 @@
     private int usedValue = 0;
 
     /**
-     * The key method that users need to implement
+     * The key method that users need to implement to process
+     * incoming messages in each superstep.
+     * 1. In a superstep, this method can be called multiple times in a continuous manner for a single
+     * vertex, each of which is to process a batch of messages. (Note that
+     * this only happens for the case when the mssages for a single vertex
+     * exceed one frame.)
+     * 2. In each superstep, before any invocation of this method for a vertex,
+     * open() is called; after all the invocations of this method for the vertex,
+     * close is called.
+     * 3. In each partition, the vertex Java object is reused
+     * for all the vertice to be processed in the same partition. (The model
+     * is the same as the key-value objects in hadoop map tasks.)
      * 
      * @param msgIterator
      *            an iterator of incoming messages
      */
-    public abstract void compute(Iterator<M> msgIterator);
+    public abstract void compute(Iterator<M> msgIterator) throws Exception;
 
     /**
      * Add an edge for the vertex.
@@ -420,7 +436,7 @@
     private M allocateMessage() {
         M message;
         if (usedMessage < msgPool.size()) {
-            message = msgPool.get(usedEdge);
+            message = msgPool.get(usedMessage);
             usedMessage++;
         } else {
             message = BspUtils.<M> createMessageValue(getContext().getConfiguration());
@@ -569,4 +585,62 @@
         Vertex.context = context;
     }
 
+    @Override
+    public int hashCode() {
+        return vertexId.hashCode();
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        Vertex vertex = (Vertex) object;
+        return vertexId.equals(vertex.getVertexId());
+    }
+
+    /**
+     * called immediately before invocations of compute() on a vertex
+     * Users can override this method to initiate the state for a vertex
+     * before the compute() invocations
+     */
+    public void open() {
+
+    }
+
+    /**
+     * called immediately after all the invocations of compute() on a vertex
+     * Users can override this method to initiate the state for a vertex
+     * before the compute() invocations
+     */
+    public void close() {
+
+    }
+
+    /**
+     * Terminate the current partition where the current vertex stays in.
+     * This will immediately take effect and the upcoming vertice in the
+     * same partition cannot be processed.
+     * 
+     */
+    protected final void terminatePartition() {
+        voteToHalt();
+        terminatePartition = true;
+    }
+
+    /**
+     * Terminate the Pregelix job.
+     * This will take effect only when the current iteration completed.
+     * 
+     * @throws Exception
+     */
+    protected void terminateJob() throws Exception {
+        Configuration conf = getContext().getConfiguration();
+        JobStateUtils.writeForceTerminationState(conf, BspUtils.getJobId(conf));
+    }
+
+    /***
+     * @return true if the partition is terminated; false otherwise
+     */
+    public boolean isPartitionTerminated() {
+        return terminatePartition;
+    }
+
 }
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/VertexPartitioner.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/VertexPartitioner.java
new file mode 100644
index 0000000..f51ad88
--- /dev/null
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/VertexPartitioner.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.pregelix.api.graph;
+
+import org.apache.hadoop.io.WritableComparable;
+
+/**
+ * Users can extend this class to implement the desired vertex partitioning behavior.
+ * 
+ * @author yingyib
+ */
+@SuppressWarnings("rawtypes")
+public abstract class VertexPartitioner<I extends WritableComparable> {
+
+    /**
+     * @param vertexId
+     *            The input vertex id.
+     * @param nPartitions
+     *            The total number of partitions.
+     * @return The partition id.
+     */
+    public abstract int getPartitionId(I vertexId, int nPartitions);
+
+}
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/Sizable.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/Sizable.java
new file mode 100644
index 0000000..568500b
--- /dev/null
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/Sizable.java
@@ -0,0 +1,23 @@
+/*
+ * 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.pregelix.api.io;
+
+/**
+ * @author yingyib
+ */
+public interface Sizable {
+
+    public int sizeInBytes();
+}
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/VertexInputFormat.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/VertexInputFormat.java
index c841b1a..73af190 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/VertexInputFormat.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/VertexInputFormat.java
@@ -40,7 +40,7 @@
  *            Message data
  */
 @SuppressWarnings("rawtypes")
-public abstract class VertexInputFormat<I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable> {
+public abstract class VertexInputFormat<I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable> {
     /**
      * Logically split the vertices for a graph processing application.
      * Each {@link InputSplit} is then assigned to a worker for processing.
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/VertexReader.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/VertexReader.java
index e6c62ba..ba8b561 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/VertexReader.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/VertexReader.java
@@ -39,7 +39,7 @@
  *            Message data
  */
 @SuppressWarnings("rawtypes")
-public interface VertexReader<I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable> {
+public interface VertexReader<I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable> {
     /**
      * Use the input split and context t o setup reading the vertices.
      * Guaranteed to be called prior to any other function.
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/WritableSizable.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/WritableSizable.java
new file mode 100644
index 0000000..ee13f76
--- /dev/null
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/WritableSizable.java
@@ -0,0 +1,24 @@
+/*
+ * 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.pregelix.api.io;
+
+import org.apache.hadoop.io.Writable;
+
+/**
+ * @author yingyib
+ */
+public interface WritableSizable extends Writable, Sizable {
+
+}
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/generated/GeneratedVertexInputFormat.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/generated/GeneratedVertexInputFormat.java
index 985bcff..1d3c427 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/generated/GeneratedVertexInputFormat.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/generated/GeneratedVertexInputFormat.java
@@ -26,13 +26,14 @@
 
 import edu.uci.ics.pregelix.api.io.BasicGenInputSplit;
 import edu.uci.ics.pregelix.api.io.VertexInputFormat;
+import edu.uci.ics.pregelix.api.io.WritableSizable;
 
 /**
  * This VertexInputFormat is meant for testing/debugging. It simply generates
  * some vertex data that can be consumed by test applications.
  */
 @SuppressWarnings("rawtypes")
-public abstract class GeneratedVertexInputFormat<I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable>
+public abstract class GeneratedVertexInputFormat<I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable>
         extends VertexInputFormat<I, V, E, M> {
 
     @Override
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/generated/GeneratedVertexReader.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/generated/GeneratedVertexReader.java
index 92c8728..376d45d 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/generated/GeneratedVertexReader.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/generated/GeneratedVertexReader.java
@@ -25,6 +25,7 @@
 
 import edu.uci.ics.pregelix.api.io.BasicGenInputSplit;
 import edu.uci.ics.pregelix.api.io.VertexReader;
+import edu.uci.ics.pregelix.api.io.WritableSizable;
 
 /**
  * Used by GeneratedVertexInputFormat to read some generated data
@@ -37,7 +38,7 @@
  *            Edge value
  */
 @SuppressWarnings("rawtypes")
-public abstract class GeneratedVertexReader<I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable>
+public abstract class GeneratedVertexReader<I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable>
         implements VertexReader<I, V, E, M> {
     /** Records read so far */
     protected long recordsRead = 0;
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/text/TextVertexInputFormat.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/text/TextVertexInputFormat.java
index 2254ae4..0faf516 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/text/TextVertexInputFormat.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/io/text/TextVertexInputFormat.java
@@ -30,6 +30,7 @@
 
 import edu.uci.ics.pregelix.api.io.VertexInputFormat;
 import edu.uci.ics.pregelix.api.io.VertexReader;
+import edu.uci.ics.pregelix.api.io.WritableSizable;
 
 /**
  * Abstract class that users should subclass to use their own text based vertex
@@ -45,7 +46,7 @@
  *            Message value
  */
 @SuppressWarnings("rawtypes")
-public abstract class TextVertexInputFormat<I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable>
+public abstract class TextVertexInputFormat<I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable>
         extends VertexInputFormat<I, V, E, M> {
     /** Uses the TextInputFormat to do everything */
     protected TextInputFormat textInputFormat = new TextInputFormat();
@@ -62,7 +63,7 @@
      * @param <E>
      *            Edge value
      */
-    public static abstract class TextVertexReader<I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable>
+    public static abstract class TextVertexReader<I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable>
             implements VertexReader<I, V, E, M> {
         /** Internal line record reader */
         private final RecordReader<LongWritable, Text> lineRecordReader;
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/job/PregelixJob.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/job/PregelixJob.java
index 81472aa..dae7818 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/job/PregelixJob.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/job/PregelixJob.java
@@ -24,6 +24,7 @@
 import edu.uci.ics.pregelix.api.graph.MessageCombiner;
 import edu.uci.ics.pregelix.api.graph.NormalizedKeyComputer;
 import edu.uci.ics.pregelix.api.graph.Vertex;
+import edu.uci.ics.pregelix.api.graph.VertexPartitioner;
 import edu.uci.ics.pregelix.api.io.VertexInputFormat;
 import edu.uci.ics.pregelix.api.io.VertexOutputFormat;
 
@@ -59,6 +60,8 @@
     public static final String FINAL_AGGREGATE_VALUE_CLASS = "pregelix.finalAggregateValueClass";
     /** The normalized key computer class */
     public static final String NMK_COMPUTER_CLASS = "pregelix.nmkComputerClass";
+    /** The partitioner class */
+    public static final String PARTITIONER_CLASS = "pregelix.partitionerClass";
     /** num of vertices */
     public static final String NUM_VERTICE = "pregelix.numVertices";
     /** num of edges */
@@ -69,6 +72,8 @@
     public static final String JOB_ID = "pregelix.jobid";
     /** frame size */
     public static final String FRAME_SIZE = "pregelix.framesize";
+    /** update intensive */
+    public static final String UPDATE_INTENSIVE = "pregelix.updateIntensive";
 
     /**
      * Constructor that will instantiate the configuration
@@ -178,4 +183,22 @@
     final public void setNoramlizedKeyComputerClass(Class<?> nkcClass) {
         getConfiguration().setClass(NMK_COMPUTER_CLASS, nkcClass, NormalizedKeyComputer.class);
     }
+
+    /**
+     * Set the vertex partitioner class
+     * 
+     * @param partitionerClass
+     */
+    final public void setVertexPartitionerClass(Class<?> partitionerClass) {
+        getConfiguration().setClass(PARTITIONER_CLASS, partitionerClass, VertexPartitioner.class);
+    }
+
+    /**
+     * Indicate if the job needs to do a lot of graph mutations or variable size updates
+     * 
+     * @param updateHeavyFlag
+     */
+    final public void setLSMStorage(boolean variableSizedUpdateHeavyFlag) {
+        getConfiguration().setBoolean(UPDATE_INTENSIVE, variableSizedUpdateHeavyFlag);
+    }
 }
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/ArrayListWritable.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/ArrayListWritable.java
index 7a9e5d5..1683541 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/ArrayListWritable.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/ArrayListWritable.java
@@ -141,9 +141,6 @@
         used = 0;
         this.clear();
         int numValues = in.readInt(); // read number of values
-        if (numValues > 100) {
-            System.out.println("num values: " + numValues);
-        }
         for (int i = 0; i < numValues; i++) {
             M value = allocateValue();
             value.readFields(in); // read a value
@@ -153,9 +150,6 @@
 
     public void write(DataOutput out) throws IOException {
         int numValues = size();
-        if (numValues > 100) {
-            System.out.println("write num values: " + numValues);
-        }
         out.writeInt(numValues); // write number of values
         for (int i = 0; i < numValues; i++) {
             get(i).write(out);
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/BspUtils.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/BspUtils.java
index 6bac923..ff4ee91 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/BspUtils.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/BspUtils.java
@@ -25,8 +25,10 @@
 import edu.uci.ics.pregelix.api.graph.MsgList;
 import edu.uci.ics.pregelix.api.graph.NormalizedKeyComputer;
 import edu.uci.ics.pregelix.api.graph.Vertex;
+import edu.uci.ics.pregelix.api.graph.VertexPartitioner;
 import edu.uci.ics.pregelix.api.io.VertexInputFormat;
 import edu.uci.ics.pregelix.api.io.VertexOutputFormat;
+import edu.uci.ics.pregelix.api.io.WritableSizable;
 import edu.uci.ics.pregelix.api.job.PregelixJob;
 
 /**
@@ -48,7 +50,7 @@
      * @return User's vertex input format class
      */
     @SuppressWarnings({ "rawtypes", "unchecked" })
-    public static <I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable> Class<? extends VertexInputFormat<I, V, E, M>> getVertexInputFormatClass(
+    public static <I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable> Class<? extends VertexInputFormat<I, V, E, M>> getVertexInputFormatClass(
             Configuration conf) {
         return (Class<? extends VertexInputFormat<I, V, E, M>>) conf.getClass(PregelixJob.VERTEX_INPUT_FORMAT_CLASS,
                 null, VertexInputFormat.class);
@@ -62,7 +64,7 @@
      * @return Instantiated user vertex input format class
      */
     @SuppressWarnings("rawtypes")
-    public static <I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable> VertexInputFormat<I, V, E, M> createVertexInputFormat(
+    public static <I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable> VertexInputFormat<I, V, E, M> createVertexInputFormat(
             Configuration conf) {
         Class<? extends VertexInputFormat<I, V, E, M>> vertexInputFormatClass = getVertexInputFormatClass(conf);
         VertexInputFormat<I, V, E, M> inputFormat = ReflectionUtils.newInstance(vertexInputFormatClass, conf);
@@ -105,7 +107,7 @@
      * @return User's vertex combiner class
      */
     @SuppressWarnings({ "rawtypes", "unchecked" })
-    public static <I extends WritableComparable, M extends Writable, P extends Writable> Class<? extends MessageCombiner<I, M, P>> getMessageCombinerClass(
+    public static <I extends WritableComparable, M extends WritableSizable, P extends Writable> Class<? extends MessageCombiner<I, M, P>> getMessageCombinerClass(
             Configuration conf) {
         return (Class<? extends MessageCombiner<I, M, P>>) conf.getClass(PregelixJob.Message_COMBINER_CLASS,
                 DefaultMessageCombiner.class, MessageCombiner.class);
@@ -119,7 +121,7 @@
      * @return User's vertex combiner class
      */
     @SuppressWarnings({ "rawtypes", "unchecked" })
-    public static <I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable, P extends Writable, F extends Writable> Class<? extends GlobalAggregator<I, V, E, M, P, F>> getGlobalAggregatorClass(
+    public static <I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable, P extends Writable, F extends Writable> Class<? extends GlobalAggregator<I, V, E, M, P, F>> getGlobalAggregatorClass(
             Configuration conf) {
         return (Class<? extends GlobalAggregator<I, V, E, M, P, F>>) conf.getClass(PregelixJob.GLOBAL_AGGREGATOR_CLASS,
                 GlobalCountAggregator.class, GlobalAggregator.class);
@@ -137,7 +139,7 @@
      * @return Instantiated user vertex combiner class
      */
     @SuppressWarnings("rawtypes")
-    public static <I extends WritableComparable, M extends Writable, P extends Writable> MessageCombiner<I, M, P> createMessageCombiner(
+    public static <I extends WritableComparable, M extends WritableSizable, P extends Writable> MessageCombiner<I, M, P> createMessageCombiner(
             Configuration conf) {
         Class<? extends MessageCombiner<I, M, P>> vertexCombinerClass = getMessageCombinerClass(conf);
         return ReflectionUtils.newInstance(vertexCombinerClass, conf);
@@ -156,14 +158,14 @@
     }
 
     /**
-     * Create a global aggregator class
+     * Create a global aggregator object
      * 
      * @param conf
      *            Configuration to check
      * @return Instantiated user vertex combiner class
      */
     @SuppressWarnings("rawtypes")
-    public static <I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable, P extends Writable, F extends Writable> GlobalAggregator<I, V, E, M, P, F> createGlobalAggregator(
+    public static <I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable, P extends Writable, F extends Writable> GlobalAggregator<I, V, E, M, P, F> createGlobalAggregator(
             Configuration conf) {
         Class<? extends GlobalAggregator<I, V, E, M, P, F>> globalAggregatorClass = getGlobalAggregatorClass(conf);
         return ReflectionUtils.newInstance(globalAggregatorClass, conf);
@@ -177,7 +179,7 @@
      * @return User's vertex class
      */
     @SuppressWarnings({ "rawtypes", "unchecked" })
-    public static <I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable> Class<? extends Vertex<I, V, E, M>> getVertexClass(
+    public static <I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable> Class<? extends Vertex<I, V, E, M>> getVertexClass(
             Configuration conf) {
         return (Class<? extends Vertex<I, V, E, M>>) conf.getClass(PregelixJob.VERTEX_CLASS, null, Vertex.class);
     }
@@ -190,7 +192,7 @@
      * @return Instantiated user vertex
      */
     @SuppressWarnings("rawtypes")
-    public static <I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable> Vertex<I, V, E, M> createVertex(
+    public static <I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable> Vertex<I, V, E, M> createVertex(
             Configuration conf) {
         Class<? extends Vertex<I, V, E, M>> vertexClass = getVertexClass(conf);
         Vertex<I, V, E, M> vertex = ReflectionUtils.newInstance(vertexClass, conf);
@@ -298,7 +300,7 @@
      * @return User's vertex message value class
      */
     @SuppressWarnings("unchecked")
-    public static <M extends Writable> Class<M> getMessageValueClass(Configuration conf) {
+    public static <M extends WritableSizable> Class<M> getMessageValueClass(Configuration conf) {
         if (conf == null)
             conf = defaultConf;
         return (Class<M>) conf.getClass(PregelixJob.MESSAGE_VALUE_CLASS, Writable.class);
@@ -368,7 +370,7 @@
      *            Configuration to check
      * @return Instantiated user vertex message value
      */
-    public static <M extends Writable> M createMessageValue(Configuration conf) {
+    public static <M extends WritableSizable> M createMessageValue(Configuration conf) {
         Class<M> messageValueClass = getMessageValueClass(conf);
         try {
             return messageValueClass.newInstance();
@@ -391,9 +393,9 @@
         try {
             return aggregateValueClass.newInstance();
         } catch (InstantiationException e) {
-            throw new IllegalArgumentException("createMessageValue: Failed to instantiate", e);
+            throw new IllegalArgumentException("createPartialAggregateValue: Failed to instantiate", e);
         } catch (IllegalAccessException e) {
-            throw new IllegalArgumentException("createMessageValue: Illegally accessed", e);
+            throw new IllegalArgumentException("createPartialAggregateValue: Illegally accessed", e);
         }
     }
 
@@ -415,9 +417,9 @@
             }
             return instance;
         } catch (InstantiationException e) {
-            throw new IllegalArgumentException("createMessageValue: Failed to instantiate", e);
+            throw new IllegalArgumentException("createPartialCombineValue: Failed to instantiate", e);
         } catch (IllegalAccessException e) {
-            throw new IllegalArgumentException("createMessageValue: Illegally accessed", e);
+            throw new IllegalArgumentException("createPartialCombineValue: Illegally accessed", e);
         }
     }
 
@@ -433,13 +435,46 @@
         try {
             return aggregateValueClass.newInstance();
         } catch (InstantiationException e) {
-            throw new IllegalArgumentException("createMessageValue: Failed to instantiate", e);
+            throw new IllegalArgumentException("createAggregateValue: Failed to instantiate", e);
         } catch (IllegalAccessException e) {
-            throw new IllegalArgumentException("createMessageValue: Illegally accessed", e);
+            throw new IllegalArgumentException("createAggregateValue: Illegally accessed", e);
         }
     }
 
     /**
+     * Create a user aggregate value
+     * 
+     * @param conf
+     *            Configuration to check
+     * @return Instantiated user aggregate value
+     */
+    @SuppressWarnings("rawtypes")
+    public static VertexPartitioner createVertexPartitioner(Configuration conf) {
+        Class<? extends VertexPartitioner> vertexPartitionerClass = getVertexPartitionerClass(conf);
+        try {
+            return vertexPartitionerClass.newInstance();
+        } catch (InstantiationException e) {
+            throw new IllegalArgumentException("createVertexPartitioner: Failed to instantiate", e);
+        } catch (IllegalAccessException e) {
+            throw new IllegalArgumentException("createVertexPartitioner: Illegally accessed", e);
+        }
+    }
+
+    /**
+     * Get the user's subclassed vertex partitioner class.
+     * 
+     * @param conf
+     *            Configuration to check
+     * @return The user defined vertex partitioner class
+     */
+    @SuppressWarnings({ "unchecked", "rawtypes" })
+    public static <V extends VertexPartitioner> Class<V> getVertexPartitionerClass(Configuration conf) {
+        if (conf == null)
+            conf = defaultConf;
+        return (Class<V>) conf.getClass(PregelixJob.PARTITIONER_CLASS, null, VertexPartitioner.class);
+    }
+
+    /**
      * Get the job configuration parameter whether the vertex states will increase dynamically
      * 
      * @param conf
@@ -460,4 +495,14 @@
     public static int getFrameSize(Configuration conf) {
         return conf.getInt(PregelixJob.FRAME_SIZE, -1);
     }
+
+    /**
+     * Should the job use LSM or B-tree to store vertices
+     * 
+     * @param conf
+     * @return
+     */
+    public static boolean useLSM(Configuration conf) {
+        return conf.getBoolean(PregelixJob.UPDATE_INTENSIVE, false);
+    }
 }
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/DefaultMessageCombiner.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/DefaultMessageCombiner.java
index d2d90a2..feb9e2f 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/DefaultMessageCombiner.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/DefaultMessageCombiner.java
@@ -14,42 +14,82 @@
  */
 package edu.uci.ics.pregelix.api.util;
 
-import org.apache.hadoop.io.Writable;
 import org.apache.hadoop.io.WritableComparable;
 
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.pregelix.api.graph.MessageCombiner;
 import edu.uci.ics.pregelix.api.graph.MsgList;
+import edu.uci.ics.pregelix.api.io.WritableSizable;
 
 @SuppressWarnings({ "rawtypes", "unchecked" })
-public class DefaultMessageCombiner<I extends WritableComparable, M extends Writable> extends
+public class DefaultMessageCombiner<I extends WritableComparable, M extends WritableSizable> extends
         MessageCombiner<I, M, MsgList> {
     private MsgList<M> msgList;
+    private int metaSlot = 8;
+    private int accumulatedSize = metaSlot;
 
     @Override
     public void init(MsgList providedMsgList) {
+        realInit(providedMsgList);
+        this.msgList.setSegmentStart(false);
+    }
+
+    private void realInit(MsgList providedMsgList) {
         this.msgList = providedMsgList;
         this.msgList.clearElements();
+        this.accumulatedSize = metaSlot;
     }
 
     @Override
     public void stepPartial(I vertexIndex, M msg) throws HyracksDataException {
         msgList.addElement(msg);
+        accumulatedSize += msg.sizeInBytes();
     }
 
     @Override
     public void stepFinal(I vertexIndex, MsgList partialAggregate) throws HyracksDataException {
         msgList.addAllElements(partialAggregate);
+        for (int i = 0; i < partialAggregate.size(); i++) {
+            accumulatedSize += ((M) partialAggregate.get(i)).sizeInBytes();
+        }
     }
 
     @Override
     public MsgList finishPartial() {
+        msgList.setSegmentEnd(false);
         return msgList;
     }
 
     @Override
     public MsgList<M> finishFinal() {
+        msgList.setSegmentEnd(false);
         return msgList;
     }
 
+    @Override
+    public void initAll(MsgList providedMsgList) {
+        realInit(providedMsgList);
+        msgList.setSegmentStart(true);
+    }
+
+    @Override
+    public MsgList<M> finishFinalAll() {
+        msgList.setSegmentEnd(true);
+        return msgList;
+    }
+
+    @Override
+    public int estimateAccumulatedStateByteSizePartial(I vertexIndex, M msg) throws HyracksDataException {
+        return accumulatedSize + msg.sizeInBytes();
+    }
+
+    @Override
+    public int estimateAccumulatedStateByteSizeFinal(I vertexIndex, MsgList partialAggregate)
+            throws HyracksDataException {
+        int size = accumulatedSize;
+        for (int i = 0; i < partialAggregate.size(); i++) {
+            size += ((M) partialAggregate.get(i)).sizeInBytes();
+        }
+        return size;
+    }
 }
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/DefaultVertexPartitioner.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/DefaultVertexPartitioner.java
new file mode 100644
index 0000000..263ec65
--- /dev/null
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/DefaultVertexPartitioner.java
@@ -0,0 +1,35 @@
+/*
+ * 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.pregelix.api.util;
+
+import org.apache.hadoop.io.WritableComparable;
+
+import edu.uci.ics.pregelix.api.graph.VertexPartitioner;
+
+/**
+ * The deafult vertex partitioner which use the hashcode of the vertex id to determine the partition
+ * of the vertex.
+ * 
+ * @author yingyib
+ */
+@SuppressWarnings("rawtypes")
+public class DefaultVertexPartitioner<I extends WritableComparable> extends VertexPartitioner<I> {
+
+    @Override
+    public int getPartitionId(I vertexId, int nPartitions) {
+        return vertexId.hashCode() % nPartitions;
+    }
+
+}
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/GlobalCountAggregator.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/GlobalCountAggregator.java
index ffc6526..9a95f09 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/GlobalCountAggregator.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/GlobalCountAggregator.java
@@ -21,9 +21,10 @@
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.pregelix.api.graph.GlobalAggregator;
 import edu.uci.ics.pregelix.api.graph.Vertex;
+import edu.uci.ics.pregelix.api.io.WritableSizable;
 
 @SuppressWarnings("rawtypes")
-public class GlobalCountAggregator<I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable>
+public class GlobalCountAggregator<I extends WritableComparable, V extends Writable, E extends Writable, M extends WritableSizable>
         extends GlobalAggregator<I, V, E, M, LongWritable, LongWritable> {
 
     private LongWritable state = new LongWritable(0);
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/JobStateUtils.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/JobStateUtils.java
new file mode 100644
index 0000000..4a98167
--- /dev/null
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/JobStateUtils.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.pregelix.api.util;
+
+import java.io.IOException;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FSDataOutputStream;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+/**
+ * @author yingyib
+ */
+public class JobStateUtils {
+
+    public static final String TMP_DIR = "/tmp/";
+
+    public static void writeForceTerminationState(Configuration conf, String jobId) throws HyracksDataException {
+        try {
+            FileSystem dfs = FileSystem.get(conf);
+            String pathStr = TMP_DIR + jobId + "fterm";
+            Path path = new Path(pathStr);
+            if (!dfs.exists(path)) {
+                FSDataOutputStream output = dfs.create(path, true);
+                output.writeBoolean(true);
+                output.flush();
+                output.close();
+            }
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    public static boolean readForceTerminationState(Configuration conf, String jobId) throws HyracksDataException {
+        try {
+            FileSystem dfs = FileSystem.get(conf);
+            String pathStr = TMP_DIR + jobId + "fterm";
+            Path path = new Path(pathStr);
+            if (dfs.exists(path)) {
+                return true;
+            } else {
+                return false;
+            }
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+}
diff --git a/pregelix/pregelix-core/pom.xml b/pregelix/pregelix-core/pom.xml
index 2a3efcf..a3f24f4 100644
--- a/pregelix/pregelix-core/pom.xml
+++ b/pregelix/pregelix-core/pom.xml
@@ -21,7 +21,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 
 
@@ -209,84 +209,84 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-api</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow-std</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-runtime</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-common</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-btree</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -300,7 +300,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks.examples</groupId>
 			<artifactId>hyracks-integration-tests</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
@@ -320,7 +320,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-ipc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
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 c0bbafd..1600ab5 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
@@ -45,4 +45,15 @@
             throw new HyracksDataException(e);
         }
     }
+    
+    @Override
+    public Configuration createConfiguration() throws HyracksDataException{
+        try {
+            Configuration conf = new Configuration();
+            SerDeUtils.deserialize(conf, data);
+            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 fcdf654..478ac07 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
@@ -53,15 +53,22 @@
 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.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.impls.NoOpOperationCallbackFactory;
+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.NoOpOperationTrackerProvider;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.SynchronousSchedulerProvider;
 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;
+import edu.uci.ics.pregelix.api.graph.VertexPartitioner;
 import edu.uci.ics.pregelix.api.io.VertexInputFormat;
 import edu.uci.ics.pregelix.api.job.PregelixJob;
 import edu.uci.ics.pregelix.api.util.BspUtils;
@@ -80,8 +87,10 @@
 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.VirtualBufferCacheProvider;
 import edu.uci.ics.pregelix.runtime.touchpoint.RuntimeHookFactory;
 import edu.uci.ics.pregelix.runtime.touchpoint.VertexIdPartitionComputerFactory;
+import edu.uci.ics.pregelix.runtime.touchpoint.VertexPartitionComputerFactory;
 import edu.uci.ics.pregelix.runtime.touchpoint.WritableSerializerDeserializerFactory;
 
 public abstract class JobGen implements IJobGen {
@@ -166,10 +175,12 @@
         comparatorFactories[0] = new WritableComparingBinaryComparatorFactory(WritableComparator.get(vertexIdClass)
                 .getClass());
 
+        int[] keyFields = new int[1];
+        keyFields[0] = 0;
         IFileSplitProvider fileSplitProvider = ClusterConfig.getFileSplitProvider(jobId, PRIMARY_INDEX);
         TreeIndexCreateOperatorDescriptor btreeCreate = new TreeIndexCreateOperatorDescriptor(spec,
-                storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories, null,
-                new BTreeDataflowHelperFactory(), new TransientLocalResourceFactoryProvider(),
+                storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories,
+                keyFields, getIndexDataflowHelperFactory(), new TransientLocalResourceFactoryProvider(),
                 NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, btreeCreate);
         spec.setFrameSize(frameSize);
@@ -229,16 +240,15 @@
         typeTraits[0] = new TypeTraits(false);
         typeTraits[1] = new TypeTraits(false);
         TreeIndexBulkLoadOperatorDescriptor btreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories, null,
-                fieldPermutation, DEFAULT_BTREE_FILL_FACTOR, false, 0, new BTreeDataflowHelperFactory(),
-                NoOpOperationCallbackFactory.INSTANCE);
+                storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories,
+                sortFields, fieldPermutation, DEFAULT_BTREE_FILL_FACTOR, false, 0, false,
+                getIndexDataflowHelperFactory(), NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, btreeBulkLoad);
 
         /**
          * connect operator descriptors
          */
-        ITuplePartitionComputerFactory hashPartitionComputerFactory = new VertexIdPartitionComputerFactory(
-                new WritableSerializerDeserializerFactory(vertexIdClass));
+        ITuplePartitionComputerFactory hashPartitionComputerFactory = getVertexPartitionComputerFactory();
         spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), scanner, 0, sorter, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), sorter, 0, btreeBulkLoad, 0);
         spec.setFrameSize(frameSize);
@@ -313,8 +323,7 @@
         /**
          * connect operator descriptors
          */
-        ITuplePartitionComputerFactory hashPartitionComputerFactory = new VertexIdPartitionComputerFactory(
-                new WritableSerializerDeserializerFactory(vertexIdClass));
+        ITuplePartitionComputerFactory hashPartitionComputerFactory = getVertexPartitionComputerFactory();
         spec.connect(new OneToOneConnectorDescriptor(spec), scanner, 0, sorter, 0);
         spec.connect(new MToNPartitioningMergingConnectorDescriptor(spec, hashPartitionComputerFactory, sortFields,
                 comparatorFactories), sorter, 0, writer, 0);
@@ -358,7 +367,7 @@
         typeTraits[1] = new TypeTraits(false);
         BTreeSearchOperatorDescriptor scanner = new BTreeSearchOperatorDescriptor(spec, recordDescriptor,
                 storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories, null,
-                null, null, true, true, new BTreeDataflowHelperFactory(), false, NoOpOperationCallbackFactory.INSTANCE);
+                null, null, true, true, getIndexDataflowHelperFactory(), false, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, scanner);
 
         /**
@@ -381,8 +390,7 @@
          */
         int[] sortFields = new int[1];
         sortFields[0] = 0;
-        ITuplePartitionComputerFactory hashPartitionComputerFactory = new VertexIdPartitionComputerFactory(
-                new WritableSerializerDeserializerFactory(vertexIdClass));
+        ITuplePartitionComputerFactory hashPartitionComputerFactory = getVertexPartitionComputerFactory();
         spec.connect(new OneToOneConnectorDescriptor(spec), emptyTupleSource, 0, scanner, 0);
         spec.connect(new MToNPartitioningMergingConnectorDescriptor(spec, hashPartitionComputerFactory, sortFields,
                 comparatorFactories), scanner, 0, writer, 0);
@@ -428,7 +436,7 @@
 
         BTreeSearchOperatorDescriptor scanner = new BTreeSearchOperatorDescriptor(spec, recordDescriptor,
                 storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories, null,
-                null, null, true, true, new BTreeDataflowHelperFactory(), false, NoOpOperationCallbackFactory.INSTANCE);
+                null, null, true, true, getIndexDataflowHelperFactory(), false, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, scanner);
 
         /**
@@ -459,7 +467,7 @@
 
         IFileSplitProvider fileSplitProvider = ClusterConfig.getFileSplitProvider(jobId, indexName);
         IndexDropOperatorDescriptor drop = new IndexDropOperatorDescriptor(spec, storageManagerInterface,
-                lcManagerProvider, fileSplitProvider, new BTreeDataflowHelperFactory());
+                lcManagerProvider, fileSplitProvider, getIndexDataflowHelperFactory());
 
         ClusterConfig.setLocationConstraint(spec, drop);
         spec.addRoot(drop);
@@ -467,6 +475,28 @@
         return spec;
     }
 
+    @SuppressWarnings({ "unchecked", "rawtypes" })
+    protected ITuplePartitionComputerFactory getVertexPartitionComputerFactory() {
+        IConfigurationFactory confFactory = new ConfigurationFactory(conf);
+        Class<? extends VertexPartitioner> partitionerClazz = BspUtils.getVertexPartitionerClass(conf);
+        if (partitionerClazz != null) {
+            return new VertexPartitionComputerFactory(confFactory);
+        } else {
+            return new VertexIdPartitionComputerFactory(new WritableSerializerDeserializerFactory(
+                    BspUtils.getVertexIndexClass(conf)));
+        }
+    }
+
+    protected IIndexDataflowHelperFactory getIndexDataflowHelperFactory() {
+        if (BspUtils.useLSM(conf)) {
+            return new LSMBTreeDataflowHelperFactory(new VirtualBufferCacheProvider(), new ConstantMergePolicyProvider(
+                    3), NoOpOperationTrackerProvider.INSTANCE, SynchronousSchedulerProvider.INSTANCE,
+                    NoOpIOOperationCallback.INSTANCE, 0.01);
+        } else {
+            return new BTreeDataflowHelperFactory();
+       }
+    }
+
     /** generate non-first iteration job */
     protected abstract JobSpecification generateNonFirstIteration(int iteration) throws HyracksException;
 
@@ -476,4 +506,4 @@
     /** generate clean-up job */
     public abstract JobSpecification[] generateCleanup() throws HyracksException;
 
-}
\ No newline at end of file
+}
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 d9a24bc..c144ddd 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
@@ -32,17 +32,10 @@
 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.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.group.IAggregatorDescriptorFactory;
-import edu.uci.ics.hyracks.dataflow.std.group.preclustered.PreclusteredGroupOperatorDescriptor;
 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.frames.BTreeNSMInteriorFrameFactory;
-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.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;
 import edu.uci.ics.pregelix.api.util.BspUtils;
@@ -59,11 +52,13 @@
 import edu.uci.ics.pregelix.dataflow.MaterializingWriteOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.TerminationStateWriterOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.base.IConfigurationFactory;
-import edu.uci.ics.pregelix.dataflow.std.BTreeSearchFunctionUpdateOperatorDescriptor;
+import edu.uci.ics.pregelix.dataflow.group.ClusteredGroupOperatorDescriptor;
+import edu.uci.ics.pregelix.dataflow.group.IClusteredAggregatorDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.IndexNestedLoopJoinFunctionUpdateOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.std.IndexNestedLoopJoinOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.std.RuntimeHookOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.std.TreeIndexBulkReLoadOperatorDescriptor;
+import edu.uci.ics.pregelix.dataflow.std.TreeSearchFunctionUpdateOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.std.base.IRecordDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IRuntimeHookFactory;
 import edu.uci.ics.pregelix.runtime.function.ComputeUpdateFunctionFactory;
@@ -72,8 +67,6 @@
 import edu.uci.ics.pregelix.runtime.touchpoint.PostSuperStepRuntimeHookFactory;
 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 {
 
@@ -135,12 +128,11 @@
                 vertexClass.getName());
         RecordDescriptor rdDelete = DataflowUtils.getRecordDescriptorFromWritableClasses(vertexIdClass.getName());
 
-        BTreeSearchFunctionUpdateOperatorDescriptor scanner = new BTreeSearchFunctionUpdateOperatorDescriptor(spec,
+        TreeSearchFunctionUpdateOperatorDescriptor scanner = new TreeSearchFunctionUpdateOperatorDescriptor(spec,
                 recordDescriptor, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, JobGenUtil.getForwardScan(iteration), null, null, true, true,
-                new BTreeDataflowHelperFactory(), inputRdFactory, 6,
-                new StartComputeUpdateFunctionFactory(confFactory), preHookFactory, null, rdUnnestedMessage, rdDummy,
-                rdPartialAggregate, rdInsert, rdDelete, rdFinal);
+                getIndexDataflowHelperFactory(), inputRdFactory, 6, new StartComputeUpdateFunctionFactory(confFactory),
+                preHookFactory, null, rdUnnestedMessage, rdDummy, rdPartialAggregate, rdInsert, rdDelete, rdFinal);
         ClusterConfig.setLocationConstraint(spec, scanner);
 
         /**
@@ -163,18 +155,18 @@
          * construct bulk-load index operator
          */
         int[] fieldPermutation = new int[] { 0, 1 };
+        int[] keyFields = new int[] { 0 };
         IBinaryComparatorFactory[] indexCmpFactories = new IBinaryComparatorFactory[1];
         indexCmpFactories[0] = JobGenUtil.getIBinaryComparatorFactory(iteration + 1,
                 WritableComparator.get(vertexIdClass).getClass());
         TreeIndexBulkReLoadOperatorDescriptor btreeBulkLoad = new TreeIndexBulkReLoadOperatorDescriptor(spec,
                 storageManagerInterface, lcManagerProvider, secondaryFileSplitProvider, typeTraits, indexCmpFactories,
-                fieldPermutation, DEFAULT_BTREE_FILL_FACTOR, new BTreeDataflowHelperFactory());
+                fieldPermutation, keyFields, DEFAULT_BTREE_FILL_FACTOR, getIndexDataflowHelperFactory());
         ClusterConfig.setLocationConstraint(spec, btreeBulkLoad);
 
         /**
          * construct local sort operator
          */
-        int[] keyFields = new int[] { 0 };
         INormalizedKeyComputerFactory nkmFactory = JobGenUtil.getINormalizedKeyComputerFactory(conf);
         IBinaryComparatorFactory[] sortCmpFactories = new IBinaryComparatorFactory[1];
         sortCmpFactories[0] = JobGenUtil.getIBinaryComparatorFactory(iteration, WritableComparator.get(vertexIdClass)
@@ -186,18 +178,18 @@
         /**
          * construct local pre-clustered group-by operator
          */
-        IAggregatorDescriptorFactory aggregatorFactory = DataflowUtils.getAccumulatingAggregatorFactory(conf, false,
-                false);
-        PreclusteredGroupOperatorDescriptor localGby = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+        IClusteredAggregatorDescriptorFactory aggregatorFactory = DataflowUtils.getAccumulatingAggregatorFactory(conf,
+                false, false);
+        ClusteredGroupOperatorDescriptor localGby = new ClusteredGroupOperatorDescriptor(spec, keyFields,
                 sortCmpFactories, aggregatorFactory, rdUnnestedMessage);
         ClusterConfig.setLocationConstraint(spec, localGby);
 
         /**
          * construct global group-by operator
          */
-        IAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(conf,
-                true, true);
-        PreclusteredGroupOperatorDescriptor globalGby = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+        IClusteredAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(
+                conf, true, true);
+        ClusteredGroupOperatorDescriptor globalGby = new ClusteredGroupOperatorDescriptor(spec, keyFields,
                 sortCmpFactories, aggregatorFactoryFinal, rdFinal);
         ClusterConfig.setLocationConstraint(spec, globalGby);
 
@@ -223,7 +215,7 @@
          */
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, getIndexDataflowHelperFactory(),
                 null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
@@ -234,7 +226,7 @@
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, null, fieldPermutationDelete, IndexOperation.DELETE,
-                new BTreeDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
+                getIndexDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -245,8 +237,7 @@
         EmptySinkOperatorDescriptor emptySink4 = new EmptySinkOperatorDescriptor(spec);
         ClusterConfig.setLocationConstraint(spec, emptySink4);
 
-        ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                new WritableSerializerDeserializerFactory(vertexIdClass));
+        ITuplePartitionComputerFactory partionFactory = getVertexPartitionComputerFactory();
         ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
 
         /** connect all operators **/
@@ -339,14 +330,9 @@
         ITypeTraits[] typeTraits = new ITypeTraits[2];
         typeTraits[0] = new TypeTraits(false);
         typeTraits[1] = new TypeTraits(false);
-        ITreeIndexFrameFactory interiorFrameFactory = new BTreeNSMInteriorFrameFactory(new TypeAwareTupleWriterFactory(
-                typeTraits));
-        ITreeIndexFrameFactory leafFrameFactory = new BTreeNSMLeafFrameFactory(new TypeAwareTupleWriterFactory(
-                typeTraits));
         IndexNestedLoopJoinOperatorDescriptor setUnion = new IndexNestedLoopJoinOperatorDescriptor(spec, rdFinal,
-                storageManagerInterface, lcManagerProvider, secondaryFileSplitProviderRead, interiorFrameFactory,
-                leafFrameFactory, typeTraits, comparatorFactories, true, keyFields, keyFields, true, true,
-                new BTreeDataflowHelperFactory(), true);
+                storageManagerInterface, lcManagerProvider, secondaryFileSplitProviderRead, typeTraits,
+                comparatorFactories, true, keyFields, keyFields, true, true, getIndexDataflowHelperFactory(), true);
         ClusterConfig.setLocationConstraint(spec, setUnion);
 
         /**
@@ -364,7 +350,7 @@
         IndexNestedLoopJoinFunctionUpdateOperatorDescriptor join = new IndexNestedLoopJoinFunctionUpdateOperatorDescriptor(
                 spec, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories,
                 JobGenUtil.getForwardScan(iteration), keyFields, keyFields, true, true,
-                new BTreeDataflowHelperFactory(), inputRdFactory, 6, new ComputeUpdateFunctionFactory(confFactory),
+                getIndexDataflowHelperFactory(), inputRdFactory, 6, new ComputeUpdateFunctionFactory(confFactory),
                 preHookFactory, null, rdUnnestedMessage, rdDummy, rdPartialAggregate, rdInsert, rdDelete, rdFinal);
         ClusterConfig.setLocationConstraint(spec, join);
 
@@ -379,7 +365,8 @@
         IFileSplitProvider secondaryFileSplitProviderWrite = ClusterConfig.getFileSplitProvider(jobId, writeFile);
         TreeIndexBulkReLoadOperatorDescriptor btreeBulkLoad = new TreeIndexBulkReLoadOperatorDescriptor(spec,
                 storageManagerInterface, lcManagerProvider, secondaryFileSplitProviderWrite, typeTraits,
-                indexCmpFactories, fieldPermutation, DEFAULT_BTREE_FILL_FACTOR, new BTreeDataflowHelperFactory());
+                indexCmpFactories, fieldPermutation, keyFields, DEFAULT_BTREE_FILL_FACTOR,
+                getIndexDataflowHelperFactory());
         ClusterConfig.setLocationConstraint(spec, btreeBulkLoad);
 
         /**
@@ -396,18 +383,18 @@
         /**
          * construct local pre-clustered group-by operator
          */
-        IAggregatorDescriptorFactory aggregatorFactory = DataflowUtils.getAccumulatingAggregatorFactory(conf, false,
-                false);
-        PreclusteredGroupOperatorDescriptor localGby = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+        IClusteredAggregatorDescriptorFactory aggregatorFactory = DataflowUtils.getAccumulatingAggregatorFactory(conf,
+                false, false);
+        ClusteredGroupOperatorDescriptor localGby = new ClusteredGroupOperatorDescriptor(spec, keyFields,
                 sortCmpFactories, aggregatorFactory, rdUnnestedMessage);
         ClusterConfig.setLocationConstraint(spec, localGby);
 
         /**
          * construct global group-by operator
          */
-        IAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(conf,
-                true, true);
-        PreclusteredGroupOperatorDescriptor globalGby = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+        IClusteredAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(
+                conf, true, true);
+        ClusteredGroupOperatorDescriptor globalGby = new ClusteredGroupOperatorDescriptor(spec, keyFields,
                 sortCmpFactories, aggregatorFactoryFinal, rdFinal);
         ClusterConfig.setLocationConstraint(spec, globalGby);
 
@@ -447,7 +434,7 @@
          */
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, getIndexDataflowHelperFactory(),
                 null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
@@ -458,7 +445,7 @@
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, null, fieldPermutationDelete, IndexOperation.DELETE,
-                new BTreeDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
+                getIndexDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -470,8 +457,7 @@
         ClusterConfig.setLocationConstraint(spec, emptySink4);
 
         ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
-        ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                new WritableSerializerDeserializerFactory(vertexIdClass));
+        ITuplePartitionComputerFactory partionFactory = getVertexPartitionComputerFactory();
         /** 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 5faf122..c29ea18 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
@@ -32,17 +32,10 @@
 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.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.group.IAggregatorDescriptorFactory;
-import edu.uci.ics.hyracks.dataflow.std.group.preclustered.PreclusteredGroupOperatorDescriptor;
 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.frames.BTreeNSMInteriorFrameFactory;
-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.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;
 import edu.uci.ics.pregelix.api.util.BspUtils;
@@ -59,9 +52,11 @@
 import edu.uci.ics.pregelix.dataflow.MaterializingWriteOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.TerminationStateWriterOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.base.IConfigurationFactory;
-import edu.uci.ics.pregelix.dataflow.std.BTreeSearchFunctionUpdateOperatorDescriptor;
+import edu.uci.ics.pregelix.dataflow.group.ClusteredGroupOperatorDescriptor;
+import edu.uci.ics.pregelix.dataflow.group.IClusteredAggregatorDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.IndexNestedLoopJoinFunctionUpdateOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.std.RuntimeHookOperatorDescriptor;
+import edu.uci.ics.pregelix.dataflow.std.TreeSearchFunctionUpdateOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.std.base.IRecordDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IRuntimeHookFactory;
 import edu.uci.ics.pregelix.runtime.function.ComputeUpdateFunctionFactory;
@@ -72,8 +67,6 @@
 import edu.uci.ics.pregelix.runtime.touchpoint.PreSuperStepRuntimeHookFactory;
 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 {
 
@@ -129,12 +122,11 @@
                 vertexClass.getName());
         RecordDescriptor rdDelete = DataflowUtils.getRecordDescriptorFromWritableClasses(vertexIdClass.getName());
 
-        BTreeSearchFunctionUpdateOperatorDescriptor scanner = new BTreeSearchFunctionUpdateOperatorDescriptor(spec,
+        TreeSearchFunctionUpdateOperatorDescriptor scanner = new TreeSearchFunctionUpdateOperatorDescriptor(spec,
                 recordDescriptor, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, JobGenUtil.getForwardScan(iteration), null, null, true, true,
-                new BTreeDataflowHelperFactory(), inputRdFactory, 5,
-                new StartComputeUpdateFunctionFactory(confFactory), preHookFactory, null, rdUnnestedMessage, rdDummy,
-                rdPartialAggregate, rdInsert, rdDelete);
+                getIndexDataflowHelperFactory(), inputRdFactory, 5, new StartComputeUpdateFunctionFactory(confFactory),
+                preHookFactory, null, rdUnnestedMessage, rdDummy, rdPartialAggregate, rdInsert, rdDelete);
         ClusterConfig.setLocationConstraint(spec, scanner);
 
         /**
@@ -152,9 +144,9 @@
         /**
          * construct local pre-clustered group-by operator
          */
-        IAggregatorDescriptorFactory aggregatorFactory = DataflowUtils.getAccumulatingAggregatorFactory(conf, false,
-                false);
-        PreclusteredGroupOperatorDescriptor localGby = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+        IClusteredAggregatorDescriptorFactory aggregatorFactory = DataflowUtils.getAccumulatingAggregatorFactory(conf,
+                false, false);
+        ClusteredGroupOperatorDescriptor localGby = new ClusteredGroupOperatorDescriptor(spec, keyFields,
                 sortCmpFactories, aggregatorFactory, rdUnnestedMessage);
         ClusterConfig.setLocationConstraint(spec, localGby);
 
@@ -163,9 +155,9 @@
          */
         RecordDescriptor rdFinal = DataflowUtils.getRecordDescriptorFromKeyValueClasses(vertexIdClass.getName(),
                 MsgList.class.getName());
-        IAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(conf,
-                true, true);
-        PreclusteredGroupOperatorDescriptor globalGby = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+        IClusteredAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(
+                conf, true, true);
+        ClusteredGroupOperatorDescriptor globalGby = new ClusteredGroupOperatorDescriptor(spec, keyFields,
                 sortCmpFactories, aggregatorFactoryFinal, rdFinal);
         ClusterConfig.setLocationConstraint(spec, globalGby);
 
@@ -206,7 +198,7 @@
         int[] fieldPermutation = new int[] { 0, 1 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, getIndexDataflowHelperFactory(),
                 null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
@@ -217,7 +209,7 @@
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, null, fieldPermutationDelete, IndexOperation.DELETE,
-                new BTreeDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
+                getIndexDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -227,8 +219,7 @@
         EmptySinkOperatorDescriptor emptySink4 = new EmptySinkOperatorDescriptor(spec);
         ClusterConfig.setLocationConstraint(spec, emptySink4);
 
-        ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                new WritableSerializerDeserializerFactory(vertexIdClass));
+        ITuplePartitionComputerFactory partionFactory = getVertexPartitionComputerFactory();
         /** connect all operators **/
         spec.connect(new OneToOneConnectorDescriptor(spec), emptyTupleSource, 0, preSuperStep, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), preSuperStep, 0, scanner, 0);
@@ -318,10 +309,6 @@
         ITypeTraits[] typeTraits = new ITypeTraits[2];
         typeTraits[0] = new TypeTraits(false);
         typeTraits[1] = new TypeTraits(false);
-        ITreeIndexFrameFactory interiorFrameFactory = new BTreeNSMInteriorFrameFactory(new TypeAwareTupleWriterFactory(
-                typeTraits));
-        ITreeIndexFrameFactory leafFrameFactory = new BTreeNSMLeafFrameFactory(new TypeAwareTupleWriterFactory(
-                typeTraits));
         INullWriterFactory[] nullWriterFactories = new INullWriterFactory[2];
         nullWriterFactories[0] = VertexIdNullWriterFactory.INSTANCE;
         nullWriterFactories[1] = MsgListNullWriterFactory.INSTANCE;
@@ -335,9 +322,9 @@
                 vertexIdClass.getName(), MsgList.class.getName(), vertexIdClass.getName(), vertexClass.getName());
 
         IndexNestedLoopJoinFunctionUpdateOperatorDescriptor join = new IndexNestedLoopJoinFunctionUpdateOperatorDescriptor(
-                spec, storageManagerInterface, lcManagerProvider, fileSplitProvider, interiorFrameFactory,
-                leafFrameFactory, typeTraits, comparatorFactories, JobGenUtil.getForwardScan(iteration), keyFields,
-                keyFields, true, true, new BTreeDataflowHelperFactory(), true, nullWriterFactories, inputRdFactory, 5,
+                spec, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories,
+                JobGenUtil.getForwardScan(iteration), keyFields, keyFields, true, true,
+                getIndexDataflowHelperFactory(), true, nullWriterFactories, inputRdFactory, 5,
                 new ComputeUpdateFunctionFactory(confFactory), preHookFactory, null, rdUnnestedMessage, rdDummy,
                 rdPartialAggregate, rdInsert, rdDelete);
         ClusterConfig.setLocationConstraint(spec, join);
@@ -356,18 +343,18 @@
         /**
          * construct local pre-clustered group-by operator
          */
-        IAggregatorDescriptorFactory aggregatorFactory = DataflowUtils.getAccumulatingAggregatorFactory(conf, false,
-                false);
-        PreclusteredGroupOperatorDescriptor localGby = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+        IClusteredAggregatorDescriptorFactory aggregatorFactory = DataflowUtils.getAccumulatingAggregatorFactory(conf,
+                false, false);
+        ClusteredGroupOperatorDescriptor localGby = new ClusteredGroupOperatorDescriptor(spec, keyFields,
                 sortCmpFactories, aggregatorFactory, rdUnnestedMessage);
         ClusterConfig.setLocationConstraint(spec, localGby);
 
         /**
          * construct global group-by operator
          */
-        IAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(conf,
-                true, true);
-        PreclusteredGroupOperatorDescriptor globalGby = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+        IClusteredAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(
+                conf, true, true);
+        ClusteredGroupOperatorDescriptor globalGby = new ClusteredGroupOperatorDescriptor(spec, keyFields,
                 sortCmpFactories, aggregatorFactoryFinal, rdFinal);
         ClusterConfig.setLocationConstraint(spec, globalGby);
 
@@ -408,7 +395,7 @@
         int[] fieldPermutation = new int[] { 0, 1 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, getIndexDataflowHelperFactory(),
                 null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
@@ -418,8 +405,8 @@
         int[] fieldPermutationDelete = new int[] { 0 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, null, fieldPermutationDelete, IndexOperation.DELETE, new BTreeDataflowHelperFactory(),
-                null, NoOpOperationCallbackFactory.INSTANCE);
+                comparatorFactories, null, fieldPermutationDelete, IndexOperation.DELETE,
+                getIndexDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -431,8 +418,7 @@
         ClusterConfig.setLocationConstraint(spec, emptySink4);
 
         ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
-        ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                new WritableSerializerDeserializerFactory(vertexIdClass));
+        ITuplePartitionComputerFactory partionFactory = getVertexPartitionComputerFactory();
 
         /** 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 fee738e..dc61971 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
@@ -31,17 +31,10 @@
 import edu.uci.ics.hyracks.dataflow.std.connectors.MToNPartitioningConnectorDescriptor;
 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.group.IAggregatorDescriptorFactory;
-import edu.uci.ics.hyracks.dataflow.std.group.preclustered.PreclusteredGroupOperatorDescriptor;
 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.frames.BTreeNSMInteriorFrameFactory;
-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.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;
 import edu.uci.ics.pregelix.api.util.BspUtils;
@@ -58,9 +51,11 @@
 import edu.uci.ics.pregelix.dataflow.MaterializingWriteOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.TerminationStateWriterOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.base.IConfigurationFactory;
-import edu.uci.ics.pregelix.dataflow.std.BTreeSearchFunctionUpdateOperatorDescriptor;
+import edu.uci.ics.pregelix.dataflow.group.ClusteredGroupOperatorDescriptor;
+import edu.uci.ics.pregelix.dataflow.group.IClusteredAggregatorDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.IndexNestedLoopJoinFunctionUpdateOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.std.RuntimeHookOperatorDescriptor;
+import edu.uci.ics.pregelix.dataflow.std.TreeSearchFunctionUpdateOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.std.base.IRecordDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IRuntimeHookFactory;
 import edu.uci.ics.pregelix.runtime.function.ComputeUpdateFunctionFactory;
@@ -71,8 +66,6 @@
 import edu.uci.ics.pregelix.runtime.touchpoint.PreSuperStepRuntimeHookFactory;
 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 {
 
@@ -131,12 +124,11 @@
                 vertexClass.getName());
         RecordDescriptor rdDelete = DataflowUtils.getRecordDescriptorFromWritableClasses(vertexIdClass.getName());
 
-        BTreeSearchFunctionUpdateOperatorDescriptor scanner = new BTreeSearchFunctionUpdateOperatorDescriptor(spec,
+        TreeSearchFunctionUpdateOperatorDescriptor scanner = new TreeSearchFunctionUpdateOperatorDescriptor(spec,
                 recordDescriptor, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, JobGenUtil.getForwardScan(iteration), null, null, true, true,
-                new BTreeDataflowHelperFactory(), inputRdFactory, 5,
-                new StartComputeUpdateFunctionFactory(confFactory), preHookFactory, null, rdUnnestedMessage, rdDummy,
-                rdPartialAggregate, rdInsert, rdDelete);
+                getIndexDataflowHelperFactory(), inputRdFactory, 5, new StartComputeUpdateFunctionFactory(confFactory),
+                preHookFactory, null, rdUnnestedMessage, rdDummy, rdPartialAggregate, rdInsert, rdDelete);
         ClusterConfig.setLocationConstraint(spec, scanner);
 
         /**
@@ -156,9 +148,9 @@
          */
         RecordDescriptor rdFinal = DataflowUtils.getRecordDescriptorFromKeyValueClasses(vertexIdClass.getName(),
                 MsgList.class.getName());
-        IAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(conf,
-                true, false);
-        PreclusteredGroupOperatorDescriptor globalGby = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+        IClusteredAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(
+                conf, true, false);
+        ClusteredGroupOperatorDescriptor globalGby = new ClusteredGroupOperatorDescriptor(spec, keyFields,
                 sortCmpFactories, aggregatorFactoryFinal, rdFinal);
         ClusterConfig.setLocationConstraint(spec, globalGby);
 
@@ -198,7 +190,7 @@
         int[] fieldPermutation = new int[] { 0, 1 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, getIndexDataflowHelperFactory(),
                 null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
@@ -209,7 +201,7 @@
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, null, fieldPermutationDelete, IndexOperation.DELETE,
-                new BTreeDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
+                getIndexDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -221,8 +213,7 @@
         ClusterConfig.setLocationConstraint(spec, emptySink4);
 
         ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
-        ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                new WritableSerializerDeserializerFactory(vertexIdClass));
+        ITuplePartitionComputerFactory partionFactory = getVertexPartitionComputerFactory();
         /** connect all operators **/
         spec.connect(new OneToOneConnectorDescriptor(spec), emptyTupleSource, 0, preSuperStep, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), preSuperStep, 0, scanner, 0);
@@ -307,10 +298,6 @@
         ITypeTraits[] typeTraits = new ITypeTraits[2];
         typeTraits[0] = new TypeTraits(false);
         typeTraits[1] = new TypeTraits(false);
-        ITreeIndexFrameFactory interiorFrameFactory = new BTreeNSMInteriorFrameFactory(new TypeAwareTupleWriterFactory(
-                typeTraits));
-        ITreeIndexFrameFactory leafFrameFactory = new BTreeNSMLeafFrameFactory(new TypeAwareTupleWriterFactory(
-                typeTraits));
         INullWriterFactory[] nullWriterFactories = new INullWriterFactory[2];
         nullWriterFactories[0] = VertexIdNullWriterFactory.INSTANCE;
         nullWriterFactories[1] = MsgListNullWriterFactory.INSTANCE;
@@ -324,9 +311,9 @@
                 vertexIdClass.getName(), MsgList.class.getName(), vertexIdClass.getName(), vertexClass.getName());
 
         IndexNestedLoopJoinFunctionUpdateOperatorDescriptor join = new IndexNestedLoopJoinFunctionUpdateOperatorDescriptor(
-                spec, storageManagerInterface, lcManagerProvider, fileSplitProvider, interiorFrameFactory,
-                leafFrameFactory, typeTraits, comparatorFactories, JobGenUtil.getForwardScan(iteration), keyFields,
-                keyFields, true, true, new BTreeDataflowHelperFactory(), true, nullWriterFactories, inputRdFactory, 5,
+                spec, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories,
+                JobGenUtil.getForwardScan(iteration), keyFields, keyFields, true, true,
+                getIndexDataflowHelperFactory(), true, nullWriterFactories, inputRdFactory, 5,
                 new ComputeUpdateFunctionFactory(confFactory), preHookFactory, null, rdUnnestedMessage, rdDummy,
                 rdPartialAggregate, rdInsert, rdDelete);
         ClusterConfig.setLocationConstraint(spec, join);
@@ -345,9 +332,9 @@
         /**
          * construct global group-by operator
          */
-        IAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(conf,
-                true, false);
-        PreclusteredGroupOperatorDescriptor globalGby = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+        IClusteredAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(
+                conf, true, false);
+        ClusteredGroupOperatorDescriptor globalGby = new ClusteredGroupOperatorDescriptor(spec, keyFields,
                 sortCmpFactories, aggregatorFactoryFinal, rdFinal);
         ClusterConfig.setLocationConstraint(spec, globalGby);
 
@@ -385,7 +372,7 @@
         int[] fieldPermutation = new int[] { 0, 1 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, getIndexDataflowHelperFactory(),
                 null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
@@ -396,7 +383,7 @@
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, null, fieldPermutationDelete, IndexOperation.DELETE,
-                new BTreeDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
+                getIndexDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -408,8 +395,7 @@
         ClusterConfig.setLocationConstraint(spec, emptySink4);
 
         ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
-        ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                new WritableSerializerDeserializerFactory(vertexIdClass));
+        ITuplePartitionComputerFactory partionFactory = getVertexPartitionComputerFactory();
 
         /** 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 eef6b7e..34f723f 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
@@ -31,17 +31,10 @@
 import edu.uci.ics.hyracks.dataflow.std.connectors.MToNPartitioningConnectorDescriptor;
 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.group.IAggregatorDescriptorFactory;
-import edu.uci.ics.hyracks.dataflow.std.group.preclustered.PreclusteredGroupOperatorDescriptor;
 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.frames.BTreeNSMInteriorFrameFactory;
-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.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;
 import edu.uci.ics.pregelix.api.util.BspUtils;
@@ -58,9 +51,11 @@
 import edu.uci.ics.pregelix.dataflow.MaterializingWriteOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.TerminationStateWriterOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.base.IConfigurationFactory;
-import edu.uci.ics.pregelix.dataflow.std.BTreeSearchFunctionUpdateOperatorDescriptor;
+import edu.uci.ics.pregelix.dataflow.group.ClusteredGroupOperatorDescriptor;
+import edu.uci.ics.pregelix.dataflow.group.IClusteredAggregatorDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.IndexNestedLoopJoinFunctionUpdateOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.std.RuntimeHookOperatorDescriptor;
+import edu.uci.ics.pregelix.dataflow.std.TreeSearchFunctionUpdateOperatorDescriptor;
 import edu.uci.ics.pregelix.dataflow.std.base.IRecordDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IRuntimeHookFactory;
 import edu.uci.ics.pregelix.runtime.function.ComputeUpdateFunctionFactory;
@@ -71,8 +66,6 @@
 import edu.uci.ics.pregelix.runtime.touchpoint.PreSuperStepRuntimeHookFactory;
 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 {
 
@@ -128,12 +121,11 @@
                 vertexClass.getName());
         RecordDescriptor rdDelete = DataflowUtils.getRecordDescriptorFromWritableClasses(vertexIdClass.getName());
 
-        BTreeSearchFunctionUpdateOperatorDescriptor scanner = new BTreeSearchFunctionUpdateOperatorDescriptor(spec,
+        TreeSearchFunctionUpdateOperatorDescriptor scanner = new TreeSearchFunctionUpdateOperatorDescriptor(spec,
                 recordDescriptor, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, JobGenUtil.getForwardScan(iteration), null, null, true, true,
-                new BTreeDataflowHelperFactory(), inputRdFactory, 5,
-                new StartComputeUpdateFunctionFactory(confFactory), preHookFactory, null, rdUnnestedMessage, rdDummy,
-                rdPartialAggregate, rdInsert, rdDelete);
+                getIndexDataflowHelperFactory(), inputRdFactory, 5, new StartComputeUpdateFunctionFactory(confFactory),
+                preHookFactory, null, rdUnnestedMessage, rdDummy, rdPartialAggregate, rdInsert, rdDelete);
         ClusterConfig.setLocationConstraint(spec, scanner);
 
         /**
@@ -151,9 +143,9 @@
         /**
          * construct local pre-clustered group-by operator
          */
-        IAggregatorDescriptorFactory aggregatorFactory = DataflowUtils.getAccumulatingAggregatorFactory(conf, false,
-                false);
-        PreclusteredGroupOperatorDescriptor localGby = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+        IClusteredAggregatorDescriptorFactory aggregatorFactory = DataflowUtils.getAccumulatingAggregatorFactory(conf,
+                false, false);
+        ClusteredGroupOperatorDescriptor localGby = new ClusteredGroupOperatorDescriptor(spec, keyFields,
                 sortCmpFactories, aggregatorFactory, rdUnnestedMessage);
         ClusterConfig.setLocationConstraint(spec, localGby);
 
@@ -169,9 +161,9 @@
          */
         RecordDescriptor rdFinal = DataflowUtils.getRecordDescriptorFromKeyValueClasses(vertexIdClass.getName(),
                 MsgList.class.getName());
-        IAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(conf,
-                true, true);
-        PreclusteredGroupOperatorDescriptor globalGby = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+        IClusteredAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(
+                conf, true, true);
+        ClusteredGroupOperatorDescriptor globalGby = new ClusteredGroupOperatorDescriptor(spec, keyFields,
                 sortCmpFactories, aggregatorFactoryFinal, rdFinal);
         ClusterConfig.setLocationConstraint(spec, globalGby);
 
@@ -212,7 +204,7 @@
         int[] fieldPermutation = new int[] { 0, 1 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, getIndexDataflowHelperFactory(),
                 null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
@@ -223,7 +215,7 @@
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, null, fieldPermutationDelete, IndexOperation.DELETE,
-                new BTreeDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
+                getIndexDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -234,8 +226,7 @@
         EmptySinkOperatorDescriptor emptySink4 = new EmptySinkOperatorDescriptor(spec);
         ClusterConfig.setLocationConstraint(spec, emptySink4);
 
-        ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                new WritableSerializerDeserializerFactory(vertexIdClass));
+        ITuplePartitionComputerFactory partionFactory = getVertexPartitionComputerFactory();
         /** connect all operators **/
         spec.connect(new OneToOneConnectorDescriptor(spec), emptyTupleSource, 0, preSuperStep, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), preSuperStep, 0, scanner, 0);
@@ -321,10 +312,6 @@
         ITypeTraits[] typeTraits = new ITypeTraits[2];
         typeTraits[0] = new TypeTraits(false);
         typeTraits[1] = new TypeTraits(false);
-        ITreeIndexFrameFactory interiorFrameFactory = new BTreeNSMInteriorFrameFactory(new TypeAwareTupleWriterFactory(
-                typeTraits));
-        ITreeIndexFrameFactory leafFrameFactory = new BTreeNSMLeafFrameFactory(new TypeAwareTupleWriterFactory(
-                typeTraits));
         INullWriterFactory[] nullWriterFactories = new INullWriterFactory[2];
         nullWriterFactories[0] = VertexIdNullWriterFactory.INSTANCE;
         nullWriterFactories[1] = MsgListNullWriterFactory.INSTANCE;
@@ -338,9 +325,9 @@
                 vertexIdClass.getName(), MsgList.class.getName(), vertexIdClass.getName(), vertexClass.getName());
 
         IndexNestedLoopJoinFunctionUpdateOperatorDescriptor join = new IndexNestedLoopJoinFunctionUpdateOperatorDescriptor(
-                spec, storageManagerInterface, lcManagerProvider, fileSplitProvider, interiorFrameFactory,
-                leafFrameFactory, typeTraits, comparatorFactories, JobGenUtil.getForwardScan(iteration), keyFields,
-                keyFields, true, true, new BTreeDataflowHelperFactory(), true, nullWriterFactories, inputRdFactory, 5,
+                spec, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories,
+                JobGenUtil.getForwardScan(iteration), keyFields, keyFields, true, true,
+                getIndexDataflowHelperFactory(), true, nullWriterFactories, inputRdFactory, 5,
                 new ComputeUpdateFunctionFactory(confFactory), preHookFactory, null, rdUnnestedMessage, rdDummy,
                 rdPartialAggregate, rdInsert, rdDelete);
         ClusterConfig.setLocationConstraint(spec, join);
@@ -359,9 +346,9 @@
         /**
          * construct local pre-clustered group-by operator
          */
-        IAggregatorDescriptorFactory aggregatorFactory = DataflowUtils.getAccumulatingAggregatorFactory(conf, false,
-                false);
-        PreclusteredGroupOperatorDescriptor localGby = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+        IClusteredAggregatorDescriptorFactory aggregatorFactory = DataflowUtils.getAccumulatingAggregatorFactory(conf,
+                false, false);
+        ClusteredGroupOperatorDescriptor localGby = new ClusteredGroupOperatorDescriptor(spec, keyFields,
                 sortCmpFactories, aggregatorFactory, rdUnnestedMessage);
         ClusterConfig.setLocationConstraint(spec, localGby);
 
@@ -375,9 +362,9 @@
         /**
          * construct global group-by operator
          */
-        IAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(conf,
-                true, true);
-        PreclusteredGroupOperatorDescriptor globalGby = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+        IClusteredAggregatorDescriptorFactory aggregatorFactoryFinal = DataflowUtils.getAccumulatingAggregatorFactory(
+                conf, true, true);
+        ClusteredGroupOperatorDescriptor globalGby = new ClusteredGroupOperatorDescriptor(spec, keyFields,
                 sortCmpFactories, aggregatorFactoryFinal, rdFinal);
         ClusterConfig.setLocationConstraint(spec, globalGby);
 
@@ -418,7 +405,7 @@
         int[] fieldPermutation = new int[] { 0, 1 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor insertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdInsert, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, new BTreeDataflowHelperFactory(),
+                comparatorFactories, null, fieldPermutation, IndexOperation.INSERT, getIndexDataflowHelperFactory(),
                 null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, insertOp);
 
@@ -429,7 +416,7 @@
         TreeIndexInsertUpdateDeleteOperatorDescriptor deleteOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, rdDelete, storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, null, fieldPermutationDelete, IndexOperation.DELETE,
-                new BTreeDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
+                getIndexDataflowHelperFactory(), null, NoOpOperationCallbackFactory.INSTANCE);
         ClusterConfig.setLocationConstraint(spec, deleteOp);
 
         /** construct empty sink operator */
@@ -441,8 +428,7 @@
         ClusterConfig.setLocationConstraint(spec, emptySink4);
 
         ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
-        ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
-                new WritableSerializerDeserializerFactory(vertexIdClass));
+        ITuplePartitionComputerFactory partionFactory = getVertexPartitionComputerFactory();
 
         /** 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/util/DataflowUtils.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/DataflowUtils.java
index 0876893..3e01109 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
@@ -21,9 +21,9 @@
 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;
-import edu.uci.ics.hyracks.dataflow.std.group.IAggregatorDescriptorFactory;
 import edu.uci.ics.pregelix.core.hadoop.config.ConfigurationFactory;
 import edu.uci.ics.pregelix.core.runtime.touchpoint.WritableRecordDescriptorFactory;
+import edu.uci.ics.pregelix.dataflow.group.IClusteredAggregatorDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IAggregateFunctionFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IRecordDescriptorFactory;
 import edu.uci.ics.pregelix.runtime.simpleagg.AccumulatingAggregatorFactory;
@@ -75,11 +75,11 @@
         return rdFactory;
     }
 
-    public static IAggregatorDescriptorFactory getAccumulatingAggregatorFactory(Configuration conf, boolean isFinal,
-            boolean partialAggAsInput) {
+    public static IClusteredAggregatorDescriptorFactory getAccumulatingAggregatorFactory(Configuration conf,
+            boolean isFinal, boolean partialAggAsInput) {
         IAggregateFunctionFactory aggFuncFactory = new AggregationFunctionFactory(new ConfigurationFactory(conf),
                 isFinal, partialAggAsInput);
-        IAggregatorDescriptorFactory aggregatorFactory = new AccumulatingAggregatorFactory(
+        IClusteredAggregatorDescriptorFactory aggregatorFactory = new AccumulatingAggregatorFactory(
                 new IAggregateFunctionFactory[] { aggFuncFactory });
         return aggregatorFactory;
     }
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 56fd676..e8a6b5c 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
@@ -14,8 +14,11 @@
  */
 package edu.uci.ics.pregelix.core.util;
 
+import java.io.File;
 import java.util.EnumSet;
 
+import org.apache.commons.io.FileUtils;
+
 import edu.uci.ics.hyracks.api.client.HyracksConnection;
 import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
 import edu.uci.ics.hyracks.api.job.JobFlag;
@@ -46,6 +49,10 @@
     private static IHyracksClientConnection hcc;
 
     public static void init() throws Exception {
+        FileUtils.forceMkdir(new File("dev1"));
+        FileUtils.forceMkdir(new File("dev2"));
+        FileUtils.forceMkdir(new File("dev3"));
+        FileUtils.forceMkdir(new File("dev4"));
         CCConfig ccConfig = new CCConfig();
         ccConfig.clientNetIpAddress = CC_HOST;
         ccConfig.clusterNetIpAddress = CC_HOST;
@@ -67,6 +74,7 @@
         ncConfig1.dataIPAddress = "127.0.0.1";
         ncConfig1.datasetIPAddress = "127.0.0.1";
         ncConfig1.nodeId = NC1_ID;
+        ncConfig1.ioDevices="dev1,dev2";
         ncConfig1.appNCMainClass = NCApplicationEntryPoint.class.getName();
         nc1 = new NodeControllerService(ncConfig1);
         nc1.start();
@@ -79,6 +87,7 @@
         ncConfig2.datasetIPAddress = "127.0.0.1";
         ncConfig2.nodeId = NC2_ID;
         ncConfig2.appNCMainClass = NCApplicationEntryPoint.class.getName();
+        ncConfig2.ioDevices="dev3,dev4";
         nc2 = new NodeControllerService(ncConfig2);
         nc2.start();
 
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 24a96a3..4c7f91d 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
@@ -278,7 +278,7 @@
             typeTraits[i] = new TypeTraits(false);
         TreeIndexBulkLoadOperatorDescriptor writer = new TreeIndexBulkLoadOperatorDescriptor(spec,
                 storageManagerInterface, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories, null,
-                fieldPermutation, DEFAULT_BTREE_FILL_FACTOR, false, 0, new BTreeDataflowHelperFactory(),
+                fieldPermutation, DEFAULT_BTREE_FILL_FACTOR, false, 0, false, new BTreeDataflowHelperFactory(),
                 NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, writer, NC1_ID, NC2_ID);
 
diff --git a/pregelix/pregelix-dataflow-std-base/pom.xml b/pregelix/pregelix-dataflow-std-base/pom.xml
index 35a6c91..d4c0ee6 100644
--- a/pregelix/pregelix-dataflow-std-base/pom.xml
+++ b/pregelix/pregelix-dataflow-std-base/pom.xml
@@ -21,7 +21,7 @@
 	<parent>
     		<groupId>edu.uci.ics.hyracks</groupId>
     		<artifactId>pregelix</artifactId>
-    		<version>0.2.7-SNAPSHOT</version>
+    		<version>0.2.10-SNAPSHOT</version>
   	</parent>
 
 
@@ -87,15 +87,15 @@
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
-			<artifactId>pregelix-api</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<artifactId>hyracks-dataflow-common</artifactId>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-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/IAggregateFunction.java b/pregelix/pregelix-dataflow-std-base/src/main/java/edu/uci/ics/pregelix/dataflow/std/base/IAggregateFunction.java
index 97db63f..c544b31 100644
--- a/pregelix/pregelix-dataflow-std-base/src/main/java/edu/uci/ics/pregelix/dataflow/std/base/IAggregateFunction.java
+++ b/pregelix/pregelix-dataflow-std-base/src/main/java/edu/uci/ics/pregelix/dataflow/std/base/IAggregateFunction.java
@@ -24,4 +24,10 @@
     public void step(IFrameTupleReference tuple) throws HyracksDataException;
 
     public void finish() throws HyracksDataException;
+
+    public void initAll() throws HyracksDataException;
+
+    public void finishAll() throws HyracksDataException;
+
+    public int estimateStep(IFrameTupleReference tuple) throws HyracksDataException;
 }
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 58795d1..d5364da 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
@@ -16,11 +16,12 @@
 
 import java.io.Serializable;
 
+import edu.uci.ics.hyracks.api.comm.IFrameWriter;
 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(IHyracksTaskContext ctx,
-			IDataOutputProvider provider) throws HyracksException;
+    public IAggregateFunction createAggregateFunction(IHyracksTaskContext ctx, IDataOutputProvider provider,
+            IFrameWriter writer) throws HyracksException;
 }
\ No newline at end of file
diff --git a/pregelix/pregelix-dataflow-std/pom.xml b/pregelix/pregelix-dataflow-std/pom.xml
index 0a478d4..9ec8e1d 100644
--- a/pregelix/pregelix-dataflow-std/pom.xml
+++ b/pregelix/pregelix-dataflow-std/pom.xml
@@ -21,7 +21,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 
 
@@ -88,77 +88,84 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow-std-base</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-hdfs-core</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-common</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-btree</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-storage-am-lsm-btree</artifactId>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-ipc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/group/ClusteredGroupOperatorDescriptor.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/group/ClusteredGroupOperatorDescriptor.java
new file mode 100644
index 0000000..bb41953
--- /dev/null
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/group/ClusteredGroupOperatorDescriptor.java
@@ -0,0 +1,50 @@
+/*
+ * 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.pregelix.dataflow.group;
+
+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.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;
+
+public class ClusteredGroupOperatorDescriptor extends AbstractSingleActivityOperatorDescriptor {
+    private final int[] groupFields;
+    private final IBinaryComparatorFactory[] comparatorFactories;
+    private final IClusteredAggregatorDescriptorFactory aggregatorFactory;
+
+    private static final long serialVersionUID = 1L;
+
+    public ClusteredGroupOperatorDescriptor(IOperatorDescriptorRegistry spec, int[] groupFields,
+            IBinaryComparatorFactory[] comparatorFactories, IClusteredAggregatorDescriptorFactory aggregatorFactory,
+            RecordDescriptor recordDescriptor) {
+        super(spec, 1, 1);
+        this.groupFields = groupFields;
+        this.comparatorFactories = comparatorFactories;
+        this.aggregatorFactory = aggregatorFactory;
+        recordDescriptors[0] = recordDescriptor;
+    }
+
+    @Override
+    public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
+            final IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions)
+            throws HyracksDataException {
+        return new ClusteredGroupOperatorNodePushable(ctx, groupFields, comparatorFactories, aggregatorFactory,
+                recordDescProvider.getInputRecordDescriptor(getActivityId(), 0), recordDescriptors[0]);
+    }
+}
\ No newline at end of file
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/group/ClusteredGroupOperatorNodePushable.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/group/ClusteredGroupOperatorNodePushable.java
new file mode 100644
index 0000000..a95a46e
--- /dev/null
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/group/ClusteredGroupOperatorNodePushable.java
@@ -0,0 +1,79 @@
+/*
+ * 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.pregelix.dataflow.group;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+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.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.io.FrameTupleAppender;
+import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputUnaryOutputOperatorNodePushable;
+
+class ClusteredGroupOperatorNodePushable extends AbstractUnaryInputUnaryOutputOperatorNodePushable {
+    private final IHyracksTaskContext ctx;
+    private final int[] groupFields;
+    private final IBinaryComparatorFactory[] comparatorFactories;
+    private final IClusteredAggregatorDescriptorFactory aggregatorFactory;
+    private final RecordDescriptor inRecordDescriptor;
+    private final RecordDescriptor outRecordDescriptor;
+    private ClusteredGroupWriter pgw;
+
+    ClusteredGroupOperatorNodePushable(IHyracksTaskContext ctx, int[] groupFields,
+            IBinaryComparatorFactory[] comparatorFactories, IClusteredAggregatorDescriptorFactory aggregatorFactory,
+            RecordDescriptor inRecordDescriptor, RecordDescriptor outRecordDescriptor) {
+        this.ctx = ctx;
+        this.groupFields = groupFields;
+        this.comparatorFactories = comparatorFactories;
+        this.aggregatorFactory = aggregatorFactory;
+        this.inRecordDescriptor = inRecordDescriptor;
+        this.outRecordDescriptor = outRecordDescriptor;
+    }
+
+    @Override
+    public void open() throws HyracksDataException {
+        final IBinaryComparator[] comparators = new IBinaryComparator[comparatorFactories.length];
+        for (int i = 0; i < comparatorFactories.length; ++i) {
+            comparators[i] = comparatorFactories[i].createBinaryComparator();
+        }
+        final ByteBuffer copyFrame = ctx.allocateFrame();
+        final FrameTupleAccessor copyFrameAccessor = new FrameTupleAccessor(ctx.getFrameSize(), inRecordDescriptor);
+        copyFrameAccessor.reset(copyFrame);
+        ByteBuffer outFrame = ctx.allocateFrame();
+        final FrameTupleAppender appender = new FrameTupleAppender(ctx.getFrameSize());
+        appender.reset(outFrame, true);
+        pgw = new ClusteredGroupWriter(ctx, groupFields, comparators, aggregatorFactory, inRecordDescriptor,
+                outRecordDescriptor, writer);
+        pgw.open();
+    }
+
+    @Override
+    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+        pgw.nextFrame(buffer);
+    }
+
+    @Override
+    public void fail() throws HyracksDataException {
+        pgw.fail();
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        pgw.close();
+    }
+}
\ No newline at end of file
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/group/ClusteredGroupWriter.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/group/ClusteredGroupWriter.java
new file mode 100644
index 0000000..4b4a1c3
--- /dev/null
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/group/ClusteredGroupWriter.java
@@ -0,0 +1,165 @@
+/*
+ * 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.pregelix.dataflow.group;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.comm.IFrameWriter;
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
+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.std.group.AggregateState;
+import edu.uci.ics.hyracks.dataflow.std.group.IAggregatorDescriptor;
+
+public class ClusteredGroupWriter implements IFrameWriter {
+    private final int[] groupFields;
+    private final IBinaryComparator[] comparators;
+    private final IAggregatorDescriptor aggregator;
+    private final AggregateState aggregateState;
+    private final IFrameWriter writer;
+    private final ByteBuffer copyFrame;
+    private final FrameTupleAccessor inFrameAccessor;
+    private final FrameTupleAccessor copyFrameAccessor;
+
+    private final ByteBuffer outFrame;
+    private final FrameTupleAppender appender;
+    private final ArrayTupleBuilder tupleBuilder;
+
+    private boolean first;
+
+    public ClusteredGroupWriter(IHyracksTaskContext ctx, int[] groupFields, IBinaryComparator[] comparators,
+            IClusteredAggregatorDescriptorFactory aggregatorFactory, RecordDescriptor inRecordDesc,
+            RecordDescriptor outRecordDesc, IFrameWriter writer) throws HyracksDataException {
+        this.groupFields = groupFields;
+        this.comparators = comparators;
+        this.writer = writer;
+        copyFrame = ctx.allocateFrame();
+        inFrameAccessor = new FrameTupleAccessor(ctx.getFrameSize(), inRecordDesc);
+        copyFrameAccessor = new FrameTupleAccessor(ctx.getFrameSize(), inRecordDesc);
+        copyFrameAccessor.reset(copyFrame);
+
+        outFrame = ctx.allocateFrame();
+        appender = new FrameTupleAppender(ctx.getFrameSize());
+        appender.reset(outFrame, true);
+
+        tupleBuilder = new ArrayTupleBuilder(outRecordDesc.getFields().length);
+        this.aggregator = aggregatorFactory.createAggregator(ctx, inRecordDesc, outRecordDesc, groupFields, groupFields, writer, outFrame, appender);
+        this.aggregateState = aggregator.createAggregateStates();
+    }
+
+    @Override
+    public void open() throws HyracksDataException {
+        writer.open();
+        first = true;
+    }
+
+    @Override
+    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+        inFrameAccessor.reset(buffer);
+        int nTuples = inFrameAccessor.getTupleCount();
+        for (int i = 0; i < nTuples; ++i) {
+            if (first) {
+
+                tupleBuilder.reset();
+                for (int j = 0; j < groupFields.length; j++) {
+                    tupleBuilder.addField(inFrameAccessor, i, groupFields[j]);
+                }
+                aggregator.init(tupleBuilder, inFrameAccessor, i, aggregateState);
+
+                first = false;
+
+            } else {
+                if (i == 0) {
+                    switchGroupIfRequired(copyFrameAccessor, copyFrameAccessor.getTupleCount() - 1, inFrameAccessor, i);
+                } else {
+                    switchGroupIfRequired(inFrameAccessor, i - 1, inFrameAccessor, i);
+                }
+
+            }
+        }
+        FrameUtils.copy(buffer, copyFrame);
+    }
+
+    private void switchGroupIfRequired(FrameTupleAccessor prevTupleAccessor, int prevTupleIndex,
+            FrameTupleAccessor currTupleAccessor, int currTupleIndex) throws HyracksDataException {
+        if (!sameGroup(prevTupleAccessor, prevTupleIndex, currTupleAccessor, currTupleIndex)) {
+            writeOutput(prevTupleAccessor, prevTupleIndex);
+
+            tupleBuilder.reset();
+            for (int j = 0; j < groupFields.length; j++) {
+                tupleBuilder.addField(currTupleAccessor, currTupleIndex, groupFields[j]);
+            }
+            aggregator.init(tupleBuilder, currTupleAccessor, currTupleIndex, aggregateState);
+        } else {
+            aggregator.aggregate(currTupleAccessor, currTupleIndex, null, 0, aggregateState);
+        }
+    }
+
+    private void writeOutput(final FrameTupleAccessor lastTupleAccessor, int lastTupleIndex)
+            throws HyracksDataException {
+        tupleBuilder.reset();
+        for (int j = 0; j < groupFields.length; j++) {
+            tupleBuilder.addField(lastTupleAccessor, lastTupleIndex, groupFields[j]);
+        }
+        aggregator.outputFinalResult(tupleBuilder, lastTupleAccessor, lastTupleIndex, aggregateState);
+        if (!appender.appendSkipEmptyField(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray(), 0,
+                tupleBuilder.getSize())) {
+            FrameUtils.flushFrame(outFrame, writer);
+            appender.reset(outFrame, true);
+            if (!appender.appendSkipEmptyField(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray(), 0,
+                    tupleBuilder.getSize())) {
+                throw new HyracksDataException("The output of size " + tupleBuilder.getSize()
+                        + " cannot be fit into a frame of size " + outFrame.array().length);
+            }
+        }
+
+    }
+
+    private boolean sameGroup(FrameTupleAccessor a1, int t1Idx, FrameTupleAccessor a2, int t2Idx) {
+        for (int i = 0; i < comparators.length; ++i) {
+            int fIdx = groupFields[i];
+            int s1 = a1.getTupleStartOffset(t1Idx) + a1.getFieldSlotsLength() + a1.getFieldStartOffset(t1Idx, fIdx);
+            int l1 = a1.getFieldLength(t1Idx, fIdx);
+            int s2 = a2.getTupleStartOffset(t2Idx) + a2.getFieldSlotsLength() + a2.getFieldStartOffset(t2Idx, fIdx);
+            int l2 = a2.getFieldLength(t2Idx, fIdx);
+            if (comparators[i].compare(a1.getBuffer().array(), s1, l1, a2.getBuffer().array(), s2, l2) != 0) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public void fail() throws HyracksDataException {
+        writer.fail();
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        if (!first) {
+            writeOutput(copyFrameAccessor, copyFrameAccessor.getTupleCount() - 1);
+            if (appender.getTupleCount() > 0) {
+                FrameUtils.flushFrame(outFrame, writer);
+            }
+        }
+        aggregateState.close();
+        writer.close();
+    }
+}
\ No newline at end of file
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/group/IClusteredAggregatorDescriptorFactory.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/group/IClusteredAggregatorDescriptorFactory.java
new file mode 100644
index 0000000..3256f08
--- /dev/null
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/group/IClusteredAggregatorDescriptorFactory.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.pregelix.dataflow.group;
+
+import java.io.Serializable;
+import java.nio.ByteBuffer;
+
+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.common.comm.io.FrameTupleAppender;
+import edu.uci.ics.hyracks.dataflow.std.group.IAggregatorDescriptor;
+
+/**
+ *
+ */
+public interface IClusteredAggregatorDescriptorFactory extends Serializable {
+
+    IAggregatorDescriptor createAggregator(IHyracksTaskContext ctx, RecordDescriptor inRecordDescriptor,
+            RecordDescriptor outRecordDescriptor, int[] keyFields, final int[] keyFieldsInPartialResults,
+            IFrameWriter resultWriter, ByteBuffer outputFrame, FrameTupleAppender appender) throws HyracksDataException;
+
+}
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 0b3a7fe..3403afc 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
@@ -23,10 +23,10 @@
 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.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.IIndexDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
@@ -91,8 +91,7 @@
 
     public IndexNestedLoopJoinFunctionUpdateOperatorDescriptor(JobSpecification spec,
             IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lcManagerProvider,
-            IFileSplitProvider fileSplitProvider, ITreeIndexFrameFactory interiorFrameFactory,
-            ITreeIndexFrameFactory leafFrameFactory, ITypeTraits[] typeTraits,
+            IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, boolean isForward, int[] lowKeyFields, int[] highKeyFields,
             boolean lowKeyInclusive, boolean highKeyInclusive, IIndexDataflowHelperFactory opHelperFactory,
             boolean isRightOuter, INullWriterFactory[] nullWriterFactories, IRecordDescriptorFactory inputRdFactory,
@@ -125,8 +124,7 @@
 
     public IndexNestedLoopJoinFunctionUpdateOperatorDescriptor(JobSpecification spec,
             IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lcManagerProvider,
-            IFileSplitProvider fileSplitProvider, ITreeIndexFrameFactory interiorFrameFactory,
-            ITreeIndexFrameFactory leafFrameFactory, ITypeTraits[] typeTraits,
+            IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, boolean isForward, int[] lowKeyFields, int[] highKeyFields,
             boolean lowKeyInclusive, boolean highKeyInclusive, IIndexDataflowHelperFactory opHelperFactory,
             boolean isSetUnion, IRecordDescriptorFactory inputRdFactory, int outputArity,
@@ -158,7 +156,7 @@
 
     @Override
     public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
-            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
+            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException {
         if (isRightOuter) {
             INullWriter[] nullWriters = new INullWriter[nullWriterFactories.length];
             for (int i = 0; i < nullWriters.length; i++)
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 bd45509..7221cb5 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
@@ -28,15 +28,12 @@
 import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputOperatorNodePushable;
-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.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.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.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
 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;
@@ -49,12 +46,12 @@
 import edu.uci.ics.pregelix.dataflow.util.UpdateBuffer;
 
 public class IndexNestedLoopJoinFunctionUpdateOperatorNodePushable extends AbstractUnaryInputOperatorNodePushable {
-    private TreeIndexDataflowHelper treeIndexOpHelper;
+    private IndexDataflowHelper treeIndexOpHelper;
     private FrameTupleAccessor accessor;
 
     private ByteBuffer writeBuffer;
     private FrameTupleAppender appender;
-    private BTree btree;
+    private ITreeIndex index;
     private PermutingFrameTupleReference lowKey;
     private PermutingFrameTupleReference highKey;
     private boolean lowKeyInclusive;
@@ -62,9 +59,8 @@
     private RangePredicate rangePred;
     private MultiComparator lowKeySearchCmp;
     private MultiComparator highKeySearchCmp;
-    private ITreeIndexCursor cursor;
-    private ITreeIndexFrame cursorFrame;
-    protected ITreeIndexAccessor indexAccessor;
+    private IIndexCursor cursor;
+    protected IIndexAccessor indexAccessor;
 
     private RecordDescriptor recDesc;
     private final IFrameWriter[] writers;
@@ -77,8 +73,9 @@
             IHyracksTaskContext ctx, int partition, IRecordDescriptorProvider recordDescProvider, boolean isForward,
             int[] lowKeyFields, int[] highKeyFields, boolean lowKeyInclusive, boolean highKeyInclusive,
             IUpdateFunctionFactory functionFactory, IRuntimeHookFactory preHookFactory,
-            IRuntimeHookFactory postHookFactory, IRecordDescriptorFactory inputRdFactory, int outputArity) {
-        treeIndexOpHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
+            IRuntimeHookFactory postHookFactory, IRecordDescriptorFactory inputRdFactory, int outputArity)
+            throws HyracksDataException {
+        treeIndexOpHelper = (IndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
                 opDesc, ctx, partition);
         this.lowKeyInclusive = lowKeyInclusive;
         this.highKeyInclusive = highKeyInclusive;
@@ -99,7 +96,7 @@
     }
 
     protected void setCursor() {
-        cursor = new BTreeRangeSearchCursor((IBTreeLeafFrame) cursorFrame, true);
+        cursor = indexAccessor.createSearchCursor();
     }
 
     @Override
@@ -112,13 +109,11 @@
 
         try {
             treeIndexOpHelper.open();
-            btree = (BTree) treeIndexOpHelper.getIndexInstance();
-            cursorFrame = btree.getLeafFrameFactory().createFrame();
-            setCursor();
+            index = (ITreeIndex) treeIndexOpHelper.getIndexInstance();
 
             // TODO: Can we construct the multicmps using helper methods?
-            int lowKeySearchFields = btree.getComparatorFactories().length;
-            int highKeySearchFields = btree.getComparatorFactories().length;
+            int lowKeySearchFields = index.getComparatorFactories().length;
+            int highKeySearchFields = index.getComparatorFactories().length;
             if (lowKey != null)
                 lowKeySearchFields = lowKey.getFieldCount();
             if (highKey != null)
@@ -126,7 +121,7 @@
 
             IBinaryComparator[] lowKeySearchComparators = new IBinaryComparator[lowKeySearchFields];
             for (int i = 0; i < lowKeySearchFields; i++) {
-                lowKeySearchComparators[i] = btree.getComparatorFactories()[i].createBinaryComparator();
+                lowKeySearchComparators[i] = index.getComparatorFactories()[i].createBinaryComparator();
             }
             lowKeySearchCmp = new MultiComparator(lowKeySearchComparators);
 
@@ -135,10 +130,9 @@
             } else {
                 IBinaryComparator[] highKeySearchComparators = new IBinaryComparator[highKeySearchFields];
                 for (int i = 0; i < highKeySearchFields; i++) {
-                    highKeySearchComparators[i] = btree.getComparatorFactories()[i].createBinaryComparator();
+                    highKeySearchComparators[i] = index.getComparatorFactories()[i].createBinaryComparator();
                 }
                 highKeySearchCmp = new MultiComparator(highKeySearchComparators);
-
             }
 
             rangePred = new RangePredicate(null, null, lowKeyInclusive, highKeyInclusive, lowKeySearchCmp,
@@ -147,9 +141,10 @@
             appender = new FrameTupleAppender(treeIndexOpHelper.getTaskContext().getFrameSize());
             appender.reset(writeBuffer, true);
 
-            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
-            cloneUpdateTb = new ArrayTupleBuilder(btree.getFieldCount());
-            updateBuffer.setFieldCount(btree.getFieldCount());
+            indexAccessor = index.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            setCursor();
+            cloneUpdateTb = new ArrayTupleBuilder(index.getFieldCount());
+            updateBuffer.setFieldCount(index.getFieldCount());
         } catch (Exception e) {
             treeIndexOpHelper.close();
             throw new HyracksDataException(e);
@@ -162,16 +157,34 @@
             ITupleReference tupleRef = cursor.getTuple();
 
             /**
+             * merge with updated tuple
+             */
+            ITupleReference indexEntryTuple = tupleRef;
+            ITupleReference cachedUpdatedLastTuple = updateBuffer.getLastTuple();
+            if (cachedUpdatedLastTuple != null) {
+                if (compare(cachedUpdatedLastTuple, tupleRef) == 0) {
+                    indexEntryTuple = cachedUpdatedLastTuple;
+                }
+            }
+
+            /**
              * call the update function
              */
-            functionProxy.functionCall(leftAccessor, tIndex, tupleRef, cloneUpdateTb);
+            functionProxy.functionCall(leftAccessor, tIndex, indexEntryTuple, cloneUpdateTb);
 
-            //doing copy update
-            CopyUpdateUtil.copyUpdate(tempTupleReference, tupleRef, updateBuffer, cloneUpdateTb, indexAccessor, cursor,
-                    rangePred);
+            /**
+             * doing copy update
+             */
+            CopyUpdateUtil.copyUpdate(tempTupleReference, indexEntryTuple, updateBuffer, cloneUpdateTb, indexAccessor,
+                    cursor, rangePred);
         }
     }
 
+    /** compare tuples */
+    private int compare(ITupleReference left, ITupleReference right) throws Exception {
+        return lowKeySearchCmp.compare(left, right);
+    }
+
     @Override
     public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
         accessor.reset(buffer);
@@ -201,7 +214,7 @@
             try {
                 cursor.close();
                 //batch update
-                updateBuffer.updateBTree(indexAccessor);
+                updateBuffer.updateIndex(indexAccessor);
             } catch (Exception e) {
                 throw new HyracksDataException(e);
             }
@@ -226,4 +239,4 @@
         writers[index] = writer;
     }
 
-}
\ No newline at end of file
+}
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 6dc713c..440ae86 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
@@ -87,8 +87,7 @@
 
     public IndexNestedLoopJoinOperatorDescriptor(JobSpecification spec, RecordDescriptor recDesc,
             IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lcManagerProvider,
-            IFileSplitProvider fileSplitProvider, ITreeIndexFrameFactory interiorFrameFactory,
-            ITreeIndexFrameFactory leafFrameFactory, ITypeTraits[] typeTraits,
+            IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, boolean isForward, int[] lowKeyFields, int[] highKeyFields,
             boolean lowKeyInclusive, boolean highKeyInclusive, IIndexDataflowHelperFactory opHelperFactory,
             boolean isSetUnion) {
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 d3114d2..2ddca90 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
@@ -29,18 +29,18 @@
 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.AbstractUnaryInputUnaryOutputOperatorNodePushable;
-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.ITreeIndexAccessor;
+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.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
 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;
+    private IndexDataflowHelper treeIndexOpHelper;
     private FrameTupleAccessor accessor;
 
     private ByteBuffer writeBuffer;
@@ -48,7 +48,7 @@
     private ArrayTupleBuilder tb;
     private DataOutput dos;
 
-    private BTree btree;
+    private ITreeIndex index;
     private PermutingFrameTupleReference lowKey;
     private PermutingFrameTupleReference highKey;
     private boolean lowKeyInclusive;
@@ -57,7 +57,7 @@
     private MultiComparator lowKeySearchCmp;
     private MultiComparator highKeySearchCmp;
     private IIndexCursor cursor;
-    protected ITreeIndexAccessor indexAccessor;
+    protected IIndexAccessor indexAccessor;
 
     private RecordDescriptor recDesc;
     private final RecordDescriptor inputRecDesc;
@@ -66,7 +66,7 @@
             int partition, IRecordDescriptorProvider recordDescProvider, boolean isForward, int[] lowKeyFields,
             int[] highKeyFields, boolean lowKeyInclusive, boolean highKeyInclusive) {
         inputRecDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
-        treeIndexOpHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
+        treeIndexOpHelper = (IndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
                 opDesc, ctx, partition);
         this.lowKeyInclusive = lowKeyInclusive;
         this.highKeyInclusive = highKeyInclusive;
@@ -91,11 +91,11 @@
 
         try {
             treeIndexOpHelper.open();
-            btree = (BTree) treeIndexOpHelper.getIndexInstance();
+            index = (ITreeIndex) treeIndexOpHelper.getIndexInstance();
             writer.open();
 
-            int lowKeySearchFields = btree.getComparatorFactories().length;
-            int highKeySearchFields = btree.getComparatorFactories().length;
+            int lowKeySearchFields = index.getComparatorFactories().length;
+            int highKeySearchFields = index.getComparatorFactories().length;
             if (lowKey != null)
                 lowKeySearchFields = lowKey.getFieldCount();
             if (highKey != null)
@@ -103,7 +103,7 @@
 
             IBinaryComparator[] lowKeySearchComparators = new IBinaryComparator[lowKeySearchFields];
             for (int i = 0; i < lowKeySearchFields; i++) {
-                lowKeySearchComparators[i] = btree.getComparatorFactories()[i].createBinaryComparator();
+                lowKeySearchComparators[i] = index.getComparatorFactories()[i].createBinaryComparator();
             }
             lowKeySearchCmp = new MultiComparator(lowKeySearchComparators);
 
@@ -112,7 +112,7 @@
             } else {
                 IBinaryComparator[] highKeySearchComparators = new IBinaryComparator[highKeySearchFields];
                 for (int i = 0; i < highKeySearchFields; i++) {
-                    highKeySearchComparators[i] = btree.getComparatorFactories()[i].createBinaryComparator();
+                    highKeySearchComparators[i] = index.getComparatorFactories()[i].createBinaryComparator();
                 }
                 highKeySearchCmp = new MultiComparator(highKeySearchComparators);
             }
@@ -120,11 +120,11 @@
             rangePred = new RangePredicate(null, null, lowKeyInclusive, highKeyInclusive, lowKeySearchCmp,
                     highKeySearchCmp);
             writeBuffer = treeIndexOpHelper.getTaskContext().allocateFrame();
-            tb = new ArrayTupleBuilder(inputRecDesc.getFields().length + btree.getFieldCount());
+            tb = new ArrayTupleBuilder(inputRecDesc.getFields().length + index.getFieldCount());
             dos = tb.getDataOutput();
             appender = new FrameTupleAppender(treeIndexOpHelper.getTaskContext().getFrameSize());
             appender.reset(writeBuffer, true);
-            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            indexAccessor = index.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
             setCursor();
         } catch (Exception e) {
             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 289128e..b21cd2a 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
@@ -30,15 +30,12 @@
 import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputOperatorNodePushable;
-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.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.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.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
 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;
@@ -52,7 +49,7 @@
 
 public class IndexNestedLoopRightOuterJoinFunctionUpdateOperatorNodePushable extends
         AbstractUnaryInputOperatorNodePushable {
-    private TreeIndexDataflowHelper treeIndexOpHelper;
+    private IndexDataflowHelper treeIndexOpHelper;
     private FrameTupleAccessor accessor;
 
     private ByteBuffer writeBuffer;
@@ -60,13 +57,12 @@
     private ArrayTupleBuilder nullTupleBuilder;
     private DataOutput dos;
 
-    private BTree btree;
+    private ITreeIndex index;
     private RangePredicate rangePred;
     private MultiComparator lowKeySearchCmp;
     private MultiComparator highKeySearchCmp;
-    private ITreeIndexCursor cursor;
-    private ITreeIndexFrame cursorFrame;
-    protected ITreeIndexAccessor indexAccessor;
+    private IIndexCursor cursor;
+    protected IIndexAccessor indexAccessor;
 
     private RecordDescriptor recDesc;
     private final RecordDescriptor inputRecDesc;
@@ -88,9 +84,9 @@
             IHyracksTaskContext ctx, int partition, IRecordDescriptorProvider recordDescProvider, boolean isForward,
             int[] lowKeyFields, int[] highKeyFields, INullWriter[] nullWriter, IUpdateFunctionFactory functionFactory,
             IRuntimeHookFactory preHookFactory, IRuntimeHookFactory postHookFactory,
-            IRecordDescriptorFactory inputRdFactory, int outputArity) {
+            IRecordDescriptorFactory inputRdFactory, int outputArity) throws HyracksDataException {
         inputRecDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
-        treeIndexOpHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
+        treeIndexOpHelper = (IndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
                 opDesc, ctx, partition);
         this.recDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
 
@@ -111,7 +107,7 @@
     }
 
     protected void setCursor() {
-        cursor = new BTreeRangeSearchCursor((IBTreeLeafFrame) cursorFrame, true);
+        cursor = indexAccessor.createSearchCursor();
     }
 
     @Override
@@ -124,18 +120,16 @@
 
         try {
             treeIndexOpHelper.open();
-            btree = (BTree) treeIndexOpHelper.getIndexInstance();
-            cursorFrame = btree.getLeafFrameFactory().createFrame();
-            setCursor();
+            index = (ITreeIndex) treeIndexOpHelper.getIndexInstance();
 
             // construct range predicate
             // TODO: Can we construct the multicmps using helper methods?
-            int lowKeySearchFields = btree.getComparatorFactories().length;
-            int highKeySearchFields = btree.getComparatorFactories().length;
+            int lowKeySearchFields = index.getComparatorFactories().length;
+            int highKeySearchFields = index.getComparatorFactories().length;
 
             IBinaryComparator[] lowKeySearchComparators = new IBinaryComparator[lowKeySearchFields];
             for (int i = 0; i < lowKeySearchFields; i++) {
-                lowKeySearchComparators[i] = btree.getComparatorFactories()[i].createBinaryComparator();
+                lowKeySearchComparators[i] = index.getComparatorFactories()[i].createBinaryComparator();
             }
             lowKeySearchCmp = new MultiComparator(lowKeySearchComparators);
 
@@ -144,7 +138,7 @@
             } else {
                 IBinaryComparator[] highKeySearchComparators = new IBinaryComparator[highKeySearchFields];
                 for (int i = 0; i < highKeySearchFields; i++) {
-                    highKeySearchComparators[i] = btree.getComparatorFactories()[i].createBinaryComparator();
+                    highKeySearchComparators[i] = index.getComparatorFactories()[i].createBinaryComparator();
                 }
                 highKeySearchCmp = new MultiComparator(highKeySearchComparators);
             }
@@ -164,7 +158,8 @@
             appender = new FrameTupleAppender(treeIndexOpHelper.getTaskContext().getFrameSize());
             appender.reset(writeBuffer, true);
 
-            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            indexAccessor = index.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            setCursor();
 
             /** set the search cursor */
             rangePred.setLowKey(null, true);
@@ -179,8 +174,8 @@
                 match = false;
             }
 
-            cloneUpdateTb = new ArrayTupleBuilder(btree.getFieldCount());
-            updateBuffer.setFieldCount(btree.getFieldCount());
+            cloneUpdateTb = new ArrayTupleBuilder(index.getFieldCount());
+            updateBuffer.setFieldCount(index.getFieldCount());
         } catch (Exception e) {
             treeIndexOpHelper.close();
             throw new HyracksDataException(e);
@@ -200,8 +195,10 @@
                 // TODO: currently use low key only, check what they mean
                 int cmp = compare(lowKey, currentTopTuple);
                 if (cmp <= 0) {
-                    if (cmp == 0)
+                    if (cmp == 0) {
                         outputMatch(i);
+                        currentTopTuple = cursor.getTuple();
+                    }
                     i++;
                 } else {
                     moveTreeCursor();
@@ -239,7 +236,7 @@
             try {
                 cursor.close();
                 //batch update
-                updateBuffer.updateBTree(indexAccessor);
+                updateBuffer.updateIndex(indexAccessor);
             } catch (Exception e) {
                 throw new HyracksDataException(e);
             }
@@ -267,16 +264,28 @@
     }
 
     //for the join match casesos
-    private void writeResults(IFrameTupleAccessor leftAccessor, int tIndex, ITupleReference frameTuple)
+    private void writeResults(IFrameTupleAccessor leftAccessor, int tIndex, ITupleReference indexTuple)
             throws Exception {
         /**
+         * merge with the cached tuple, if any
+         */
+        ITupleReference indexEntryTuple = indexTuple;
+        ITupleReference cachedUpdatedLastTuple = updateBuffer.getLastTuple();
+        if (cachedUpdatedLastTuple != null) {
+            if (compare(cachedUpdatedLastTuple, indexTuple) == 0) {
+                indexEntryTuple = cachedUpdatedLastTuple;
+            }
+        }
+        /**
          * function call
          */
-        functionProxy.functionCall(leftAccessor, tIndex, frameTuple, cloneUpdateTb);
+        functionProxy.functionCall(leftAccessor, tIndex, indexEntryTuple, cloneUpdateTb);
 
-        //doing clone update
-        CopyUpdateUtil.copyUpdate(tempTupleReference, frameTuple, updateBuffer, cloneUpdateTb, indexAccessor, cursor,
-                rangePred);
+        /**
+         * doing clone update
+         */
+        CopyUpdateUtil.copyUpdate(tempTupleReference, indexEntryTuple, updateBuffer, cloneUpdateTb, indexAccessor,
+                cursor, rangePred);
     }
 
     /** write result for outer case */
@@ -295,4 +304,4 @@
     public void setOutputFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc) {
         writers[index] = writer;
     }
-}
\ No newline at end of file
+}
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 6f7643e..dd6ee3c 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
@@ -30,22 +30,19 @@
 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.AbstractUnaryInputUnaryOutputOperatorNodePushable;
-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.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.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.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
 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 {
-    private TreeIndexDataflowHelper treeIndexOpHelper;
+    private IndexDataflowHelper treeIndexOpHelper;
     private FrameTupleAccessor accessor;
 
     private ByteBuffer writeBuffer;
@@ -53,14 +50,13 @@
     private ArrayTupleBuilder tb;
     private DataOutput dos;
 
-    private BTree btree;
+    private ITreeIndex index;
     private boolean isForward;
     private RangePredicate rangePred;
     private MultiComparator lowKeySearchCmp;
     private MultiComparator highKeySearchCmp;
-    private ITreeIndexCursor cursor;
-    private ITreeIndexFrame cursorFrame;
-    protected ITreeIndexAccessor indexAccessor;
+    private IIndexCursor cursor;
+    protected IIndexAccessor indexAccessor;
 
     private RecordDescriptor recDesc;
     private final RecordDescriptor inputRecDesc;
@@ -76,7 +72,7 @@
             IHyracksTaskContext ctx, int partition, IRecordDescriptorProvider recordDescProvider, boolean isForward,
             int[] lowKeyFields, int[] highKeyFields, INullWriter[] nullWriter) {
         inputRecDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
-        treeIndexOpHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
+        treeIndexOpHelper = (IndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
                 opDesc, ctx, partition);
         this.isForward = isForward;
         this.recDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
@@ -93,7 +89,7 @@
     }
 
     protected void setCursor() {
-        cursor = new BTreeRangeSearchCursor((IBTreeLeafFrame) cursorFrame, false);
+        cursor = indexAccessor.createSearchCursor();
     }
 
     @Override
@@ -101,19 +97,17 @@
         accessor = new FrameTupleAccessor(treeIndexOpHelper.getTaskContext().getFrameSize(), recDesc);
         try {
             treeIndexOpHelper.open();
-            btree = (BTree) treeIndexOpHelper.getIndexInstance();
-            cursorFrame = btree.getLeafFrameFactory().createFrame();
-            setCursor();
+            index = (ITreeIndex) treeIndexOpHelper.getIndexInstance();
             writer.open();
 
             // construct range predicate
             // TODO: Can we construct the multicmps using helper methods?
-            int lowKeySearchFields = btree.getComparatorFactories().length;
-            int highKeySearchFields = btree.getComparatorFactories().length;
+            int lowKeySearchFields = index.getComparatorFactories().length;
+            int highKeySearchFields = index.getComparatorFactories().length;
 
             IBinaryComparator[] lowKeySearchComparators = new IBinaryComparator[lowKeySearchFields];
             for (int i = 0; i < lowKeySearchFields; i++) {
-                lowKeySearchComparators[i] = btree.getComparatorFactories()[i].createBinaryComparator();
+                lowKeySearchComparators[i] = index.getComparatorFactories()[i].createBinaryComparator();
             }
             lowKeySearchCmp = new MultiComparator(lowKeySearchComparators);
 
@@ -122,7 +116,7 @@
             } else {
                 IBinaryComparator[] highKeySearchComparators = new IBinaryComparator[highKeySearchFields];
                 for (int i = 0; i < highKeySearchFields; i++) {
-                    highKeySearchComparators[i] = btree.getComparatorFactories()[i].createBinaryComparator();
+                    highKeySearchComparators[i] = index.getComparatorFactories()[i].createBinaryComparator();
                 }
                 highKeySearchCmp = new MultiComparator(highKeySearchComparators);
 
@@ -131,12 +125,13 @@
             rangePred = new RangePredicate(null, null, true, true, lowKeySearchCmp, highKeySearchCmp);
 
             writeBuffer = treeIndexOpHelper.getTaskContext().allocateFrame();
-            tb = new ArrayTupleBuilder(inputRecDesc.getFields().length + btree.getFieldCount());
+            tb = new ArrayTupleBuilder(inputRecDesc.getFields().length + index.getFieldCount());
             dos = tb.getDataOutput();
             appender = new FrameTupleAppender(treeIndexOpHelper.getTaskContext().getFrameSize());
             appender.reset(writeBuffer, true);
 
-            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            indexAccessor = index.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            setCursor();
 
             /** set the search cursor */
             rangePred.setLowKey(null, true);
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 c978614..3cebfb8 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
@@ -28,15 +28,12 @@
 import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputOperatorNodePushable;
-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.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.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.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
 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;
@@ -49,19 +46,18 @@
 import edu.uci.ics.pregelix.dataflow.util.UpdateBuffer;
 
 public class IndexNestedLoopSetUnionFunctionUpdateOperatorNodePushable extends AbstractUnaryInputOperatorNodePushable {
-    private TreeIndexDataflowHelper treeIndexOpHelper;
+    private IndexDataflowHelper treeIndexOpHelper;
     private FrameTupleAccessor accessor;
 
     private ByteBuffer writeBuffer;
     private FrameTupleAppender appender;
 
-    private BTree btree;
+    private ITreeIndex index;
     private boolean isForward;
     private RangePredicate rangePred;
     private MultiComparator lowKeySearchCmp;
-    private ITreeIndexCursor cursor;
-    private ITreeIndexFrame cursorFrame;
-    protected ITreeIndexAccessor indexAccessor;
+    private IIndexCursor cursor;
+    protected IIndexAccessor indexAccessor;
 
     private RecordDescriptor recDesc;
     private PermutingFrameTupleReference lowKey;
@@ -80,8 +76,8 @@
             IHyracksTaskContext ctx, int partition, IRecordDescriptorProvider recordDescProvider, boolean isForward,
             int[] lowKeyFields, int[] highKeyFields, IUpdateFunctionFactory functionFactory,
             IRuntimeHookFactory preHookFactory, IRuntimeHookFactory postHookFactory,
-            IRecordDescriptorFactory inputRdFactory, int outputArity) {
-        treeIndexOpHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
+            IRecordDescriptorFactory inputRdFactory, int outputArity) throws HyracksDataException {
+        treeIndexOpHelper = (IndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
                 opDesc, ctx, partition);
         this.isForward = isForward;
         this.recDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
@@ -102,7 +98,7 @@
     }
 
     protected void setCursor() {
-        cursor = new BTreeRangeSearchCursor((IBTreeLeafFrame) cursorFrame, true);
+        cursor = indexAccessor.createSearchCursor();
     }
 
     @Override
@@ -112,15 +108,13 @@
 
         try {
             treeIndexOpHelper.open();
-            btree = (BTree) treeIndexOpHelper.getIndexInstance();
-            cursorFrame = btree.getLeafFrameFactory().createFrame();
-            setCursor();
+            index = (ITreeIndex) treeIndexOpHelper.getIndexInstance();
 
             rangePred = new RangePredicate(null, null, true, true, null, null);
-            int lowKeySearchFields = btree.getComparatorFactories().length;
+            int lowKeySearchFields = index.getComparatorFactories().length;
             IBinaryComparator[] lowKeySearchComparators = new IBinaryComparator[lowKeySearchFields];
             for (int i = 0; i < lowKeySearchFields; i++) {
-                lowKeySearchComparators[i] = btree.getComparatorFactories()[i].createBinaryComparator();
+                lowKeySearchComparators[i] = index.getComparatorFactories()[i].createBinaryComparator();
             }
             lowKeySearchCmp = new MultiComparator(lowKeySearchComparators);
 
@@ -128,7 +122,8 @@
             appender = new FrameTupleAppender(treeIndexOpHelper.getTaskContext().getFrameSize());
             appender.reset(writeBuffer, true);
 
-            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            indexAccessor = index.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            setCursor();
 
             /** set the search cursor */
             rangePred.setLowKey(null, true);
@@ -142,8 +137,8 @@
                 currentTopTuple = cursor.getTuple();
                 match = false;
             }
-            cloneUpdateTb = new ArrayTupleBuilder(btree.getFieldCount());
-            updateBuffer.setFieldCount(btree.getFieldCount());
+            cloneUpdateTb = new ArrayTupleBuilder(index.getFieldCount());
+            updateBuffer.setFieldCount(index.getFieldCount());
         } catch (Exception e) {
             treeIndexOpHelper.close();
             throw new HyracksDataException(e);
@@ -210,7 +205,7 @@
                 cursor.close();
 
                 //batch update
-                updateBuffer.updateBTree(indexAccessor);
+                updateBuffer.updateIndex(indexAccessor);
             } catch (Exception e) {
                 throw new HyracksDataException(e);
             }
@@ -256,4 +251,4 @@
     public void setOutputFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc) {
         writers[index] = writer;
     }
-}
\ No newline at end of file
+}
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 eef7c85..bbe2764 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
@@ -29,21 +29,18 @@
 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.AbstractUnaryInputUnaryOutputOperatorNodePushable;
-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.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.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.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
 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;
+    private IndexDataflowHelper treeIndexOpHelper;
     private FrameTupleAccessor accessor;
 
     private ByteBuffer writeBuffer;
@@ -51,12 +48,11 @@
     private ArrayTupleBuilder tb;
     private DataOutput dos;
 
-    private BTree btree;
+    private ITreeIndex index;
     private RangePredicate rangePred;
     private MultiComparator lowKeySearchCmp;
-    private ITreeIndexCursor cursor;
-    private ITreeIndexFrame cursorFrame;
-    protected ITreeIndexAccessor indexAccessor;
+    private IIndexCursor cursor;
+    protected IIndexAccessor indexAccessor;
 
     private RecordDescriptor recDesc;
     private final RecordDescriptor inputRecDesc;
@@ -71,7 +67,7 @@
             IHyracksTaskContext ctx, int partition, IRecordDescriptorProvider recordDescProvider, boolean isForward,
             int[] lowKeyFields, int[] highKeyFields) {
         inputRecDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
-        treeIndexOpHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
+        treeIndexOpHelper = (IndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
                 opDesc, ctx, partition);
         this.recDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
 
@@ -86,7 +82,7 @@
     }
 
     protected void setCursor() {
-        cursor = new BTreeRangeSearchCursor((IBTreeLeafFrame) cursorFrame, false);
+        cursor = indexAccessor.createSearchCursor();
     }
 
     @Override
@@ -95,26 +91,25 @@
 
         try {
             treeIndexOpHelper.open();
-            btree = (BTree) treeIndexOpHelper.getIndexInstance();
-            cursorFrame = btree.getLeafFrameFactory().createFrame();
-            setCursor();
+            index = (ITreeIndex) treeIndexOpHelper.getIndexInstance();
             writer.open();
 
             rangePred = new RangePredicate(null, null, true, true, null, null);
-            int lowKeySearchFields = btree.getComparatorFactories().length;
+            int lowKeySearchFields = index.getComparatorFactories().length;
             IBinaryComparator[] lowKeySearchComparators = new IBinaryComparator[lowKeySearchFields];
             for (int i = 0; i < lowKeySearchFields; i++) {
-                lowKeySearchComparators[i] = btree.getComparatorFactories()[i].createBinaryComparator();
+                lowKeySearchComparators[i] = index.getComparatorFactories()[i].createBinaryComparator();
             }
             lowKeySearchCmp = new MultiComparator(lowKeySearchComparators);
 
             writeBuffer = treeIndexOpHelper.getTaskContext().allocateFrame();
-            tb = new ArrayTupleBuilder(btree.getFieldCount());
+            tb = new ArrayTupleBuilder(index.getFieldCount());
             dos = tb.getDataOutput();
             appender = new FrameTupleAppender(treeIndexOpHelper.getTaskContext().getFrameSize());
             appender.reset(writeBuffer, true);
 
-            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            indexAccessor = index.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            setCursor();
 
             /** set the search cursor */
             rangePred.setLowKey(null, true);
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 1dc1529..4dd78c3 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
@@ -42,9 +42,9 @@
     public TreeIndexBulkReLoadOperatorDescriptor(JobSpecification spec, IStorageManagerInterface storageManager,
             IIndexLifecycleManagerProvider lcManagerProvider, IFileSplitProvider fileSplitProvider,
             ITypeTraits[] typeTraits, IBinaryComparatorFactory[] comparatorFactories, int[] fieldPermutation,
-            float fillFactor, IIndexDataflowHelperFactory opHelperFactory) {
+            int[] bloomFilterFields, float fillFactor, IIndexDataflowHelperFactory opHelperFactory) {
         super(spec, 1, 0, null, storageManager, lcManagerProvider, fileSplitProvider, typeTraits, comparatorFactories,
-                fieldPermutation, opHelperFactory, null, false, new TransientLocalResourceFactoryProvider(),
+                bloomFilterFields, opHelperFactory, null, false, new TransientLocalResourceFactoryProvider(),
                 NoOpOperationCallbackFactory.INSTANCE, NoOpOperationCallbackFactory.INSTANCE);
         this.fieldPermutation = fieldPermutation;
 
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 208d41c..c4890e1 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
@@ -29,13 +29,13 @@
 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.IIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
 import edu.uci.ics.hyracks.storage.am.common.tuples.PermutingFrameTupleReference;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
 public class TreeIndexBulkReLoadOperatorNodePushable extends AbstractUnaryInputSinkOperatorNodePushable {
     private final float fillFactor;
-    private final TreeIndexDataflowHelper treeIndexOpHelper;
+    private final IndexDataflowHelper treeIndexOpHelper;
     private final IIndexOperatorDescriptor opDesc;
     private final IRecordDescriptorProvider recordDescProvider;
     private final PermutingFrameTupleReference tuple = new PermutingFrameTupleReference();
@@ -49,7 +49,7 @@
             IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lcManagerProvider,
             IFileSplitProvider fileSplitProvider) {
         this.fillFactor = fillFactor;
-        treeIndexOpHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
+        treeIndexOpHelper = (IndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
                 opDesc, ctx, partition);
         this.opDesc = opDesc;
         this.recordDescProvider = recordDescProvider;
@@ -60,11 +60,12 @@
     public void open() throws HyracksDataException {
         RecordDescriptor recDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
         accessor = new FrameTupleAccessor(treeIndexOpHelper.getTaskContext().getFrameSize(), recDesc);
+        treeIndexOpHelper.destroy();
         treeIndexOpHelper.create();
         treeIndexOpHelper.open();
         try {
             index = (ITreeIndex) treeIndexOpHelper.getIndexInstance();
-            bulkLoader = index.createBulkLoader(fillFactor, false, 0);
+            bulkLoader = index.createBulkLoader(fillFactor, false, 0, false);
         } catch (Exception e) {
             // cleanup in case of failure
             treeIndexOpHelper.close();
@@ -99,5 +100,6 @@
 
     @Override
     public void fail() throws HyracksDataException {
+
     }
 }
\ No newline at end of file
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/TreeSearchFunctionUpdateOperatorDescriptor.java
similarity index 90%
rename from pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/BTreeSearchFunctionUpdateOperatorDescriptor.java
rename to pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeSearchFunctionUpdateOperatorDescriptor.java
index 784288f..31496a9 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/TreeSearchFunctionUpdateOperatorDescriptor.java
@@ -21,6 +21,7 @@
 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.JobSpecification;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
@@ -33,7 +34,7 @@
 import edu.uci.ics.pregelix.dataflow.std.base.IRuntimeHookFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IUpdateFunctionFactory;
 
-public class BTreeSearchFunctionUpdateOperatorDescriptor extends AbstractTreeIndexOperatorDescriptor {
+public class TreeSearchFunctionUpdateOperatorDescriptor extends AbstractTreeIndexOperatorDescriptor {
 
     private static final long serialVersionUID = 1L;
 
@@ -52,7 +53,7 @@
 
     private final int outputArity;
 
-    public BTreeSearchFunctionUpdateOperatorDescriptor(JobSpecification spec, RecordDescriptor recDesc,
+    public TreeSearchFunctionUpdateOperatorDescriptor(JobSpecification spec, RecordDescriptor recDesc,
             IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lcManagerProvider,
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, boolean isForward, int[] lowKeyFields, int[] highKeyFields,
@@ -83,9 +84,9 @@
 
     @Override
     public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
-            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
-        return new BTreeSearchFunctionUpdateOperatorNodePushable(this, ctx, partition, recordDescProvider, isForward,
+            IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException {
+        return new TreeSearchFunctionUpdateOperatorNodePushable(this, ctx, partition, recordDescProvider, isForward,
                 lowKeyFields, highKeyFields, lowKeyInclusive, highKeyInclusive, functionFactory, preHookFactory,
                 postHookFactory, inputRdFactory, outputArity);
     }
-}
\ No newline at end of file
+}
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/TreeSearchFunctionUpdateOperatorNodePushable.java
similarity index 73%
rename from pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/BTreeSearchFunctionUpdateOperatorNodePushable.java
rename to pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/std/TreeSearchFunctionUpdateOperatorNodePushable.java
index 0216b52..bd85e3e 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/TreeSearchFunctionUpdateOperatorNodePushable.java
@@ -19,6 +19,7 @@
 
 import edu.uci.ics.hyracks.api.comm.IFrameWriter;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
 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;
@@ -27,16 +28,13 @@
 import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputOperatorNodePushable;
-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.btree.util.BTreeUtils;
-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.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.api.ITreeIndexFrame;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDataflowHelper;
 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;
@@ -48,8 +46,8 @@
 import edu.uci.ics.pregelix.dataflow.util.SearchKeyTupleReference;
 import edu.uci.ics.pregelix.dataflow.util.UpdateBuffer;
 
-public class BTreeSearchFunctionUpdateOperatorNodePushable extends AbstractUnaryInputOperatorNodePushable {
-    protected TreeIndexDataflowHelper treeIndexHelper;
+public class TreeSearchFunctionUpdateOperatorNodePushable extends AbstractUnaryInputOperatorNodePushable {
+    protected IndexDataflowHelper treeIndexHelper;
     protected FrameTupleAccessor accessor;
 
     protected ByteBuffer writeBuffer;
@@ -57,7 +55,7 @@
     protected ArrayTupleBuilder tb;
     protected DataOutput dos;
 
-    protected BTree btree;
+    protected ITreeIndex index;
     protected boolean isForward;
     protected PermutingFrameTupleReference lowKey;
     protected PermutingFrameTupleReference highKey;
@@ -66,9 +64,11 @@
     protected RangePredicate rangePred;
     protected MultiComparator lowKeySearchCmp;
     protected MultiComparator highKeySearchCmp;
-    protected ITreeIndexCursor cursor;
+    protected IIndexCursor cursor;
     protected ITreeIndexFrame cursorFrame;
-    protected ITreeIndexAccessor indexAccessor;
+    protected IIndexAccessor indexAccessor;
+    protected int[] lowKeyFields;
+    protected int[] highKeyFields;
 
     protected RecordDescriptor recDesc;
 
@@ -78,16 +78,19 @@
     private final UpdateBuffer updateBuffer;
     private final SearchKeyTupleReference tempTupleReference = new SearchKeyTupleReference();
 
-    public BTreeSearchFunctionUpdateOperatorNodePushable(AbstractTreeIndexOperatorDescriptor opDesc,
+    public TreeSearchFunctionUpdateOperatorNodePushable(AbstractTreeIndexOperatorDescriptor opDesc,
             IHyracksTaskContext ctx, int partition, IRecordDescriptorProvider recordDescProvider, boolean isForward,
             int[] lowKeyFields, int[] highKeyFields, boolean lowKeyInclusive, boolean highKeyInclusive,
             IUpdateFunctionFactory functionFactory, IRuntimeHookFactory preHookFactory,
-            IRuntimeHookFactory postHookFactory, IRecordDescriptorFactory inputRdFactory, int outputArity) {
-        treeIndexHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
+            IRuntimeHookFactory postHookFactory, IRecordDescriptorFactory inputRdFactory, int outputArity)
+            throws HyracksDataException {
+        treeIndexHelper = (IndexDataflowHelper) opDesc.getIndexDataflowHelperFactory().createIndexDataflowHelper(
                 opDesc, ctx, partition);
         this.isForward = isForward;
         this.lowKeyInclusive = lowKeyInclusive;
         this.highKeyInclusive = highKeyInclusive;
+        this.lowKeyFields = lowKeyFields;
+        this.highKeyFields = highKeyFields;
         this.recDesc = recordDescProvider.getInputRecordDescriptor(opDesc.getActivityId(), 0);
         if (lowKeyFields != null && lowKeyFields.length > 0) {
             lowKey = new PermutingFrameTupleReference();
@@ -114,25 +117,46 @@
 
         try {
             treeIndexHelper.open();
-            btree = (BTree) treeIndexHelper.getIndexInstance();
-            cursorFrame = btree.getLeafFrameFactory().createFrame();
-            setCursor();
+            index = (ITreeIndex) treeIndexHelper.getIndexInstance();
+            cursorFrame = index.getLeafFrameFactory().createFrame();
 
             // Construct range predicate.
-            lowKeySearchCmp = BTreeUtils.getSearchMultiComparator(btree.getComparatorFactories(), lowKey);
-            highKeySearchCmp = BTreeUtils.getSearchMultiComparator(btree.getComparatorFactories(), highKey);
+            int lowKeySearchFields = index.getComparatorFactories().length;
+            int highKeySearchFields = index.getComparatorFactories().length;
+            if (lowKey != null)
+                lowKeySearchFields = lowKey.getFieldCount();
+            if (highKey != null)
+                highKeySearchFields = highKey.getFieldCount();
+
+            IBinaryComparator[] lowKeySearchComparators = new IBinaryComparator[lowKeySearchFields];
+            for (int i = 0; i < lowKeySearchFields; i++) {
+                lowKeySearchComparators[i] = index.getComparatorFactories()[i].createBinaryComparator();
+            }
+            lowKeySearchCmp = new MultiComparator(lowKeySearchComparators);
+
+            if (lowKeySearchFields == highKeySearchFields) {
+                highKeySearchCmp = lowKeySearchCmp;
+            } else {
+                IBinaryComparator[] highKeySearchComparators = new IBinaryComparator[highKeySearchFields];
+                for (int i = 0; i < highKeySearchFields; i++) {
+                    highKeySearchComparators[i] = index.getComparatorFactories()[i].createBinaryComparator();
+                }
+                highKeySearchCmp = new MultiComparator(highKeySearchComparators);
+            }
+
             rangePred = new RangePredicate(null, null, lowKeyInclusive, highKeyInclusive, lowKeySearchCmp,
                     highKeySearchCmp);
 
             writeBuffer = treeIndexHelper.getTaskContext().allocateFrame();
-            tb = new ArrayTupleBuilder(btree.getFieldCount());
+            tb = new ArrayTupleBuilder(index.getFieldCount());
             dos = tb.getDataOutput();
             appender = new FrameTupleAppender(treeIndexHelper.getTaskContext().getFrameSize());
             appender.reset(writeBuffer, true);
-            indexAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            indexAccessor = index.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE);
+            setCursor();
 
-            cloneUpdateTb = new ArrayTupleBuilder(btree.getFieldCount());
-            updateBuffer.setFieldCount(btree.getFieldCount());
+            cloneUpdateTb = new ArrayTupleBuilder(index.getFieldCount());
+            updateBuffer.setFieldCount(index.getFieldCount());
         } catch (Exception e) {
             treeIndexHelper.close();
             throw new HyracksDataException(e);
@@ -140,7 +164,7 @@
     }
 
     protected void setCursor() {
-        cursor = new BTreeRangeSearchCursor((IBTreeLeafFrame) cursorFrame, false);
+        cursor = indexAccessor.createSearchCursor();
     }
 
     protected void writeSearchResults() throws Exception {
@@ -184,7 +208,7 @@
             try {
                 cursor.close();
                 //batch update
-                updateBuffer.updateBTree(indexAccessor);
+                updateBuffer.updateIndex(indexAccessor);
             } catch (Exception e) {
                 throw new HyracksDataException(e);
             }
@@ -209,4 +233,4 @@
         writers[index] = writer;
     }
 
-}
\ No newline at end of file
+}
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/CopyUpdateUtil.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/CopyUpdateUtil.java
index b141eaf..8709301 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/CopyUpdateUtil.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/CopyUpdateUtil.java
@@ -19,15 +19,15 @@
 import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
 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.ITreeIndexAccessor;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexCursor;
+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;
 
 public class CopyUpdateUtil {
 
     public static void copyUpdate(SearchKeyTupleReference tempTupleReference, ITupleReference frameTuple,
-            UpdateBuffer updateBuffer, ArrayTupleBuilder cloneUpdateTb, ITreeIndexAccessor indexAccessor,
-            ITreeIndexCursor cursor, RangePredicate rangePred) throws HyracksDataException, IndexException {
+            UpdateBuffer updateBuffer, ArrayTupleBuilder cloneUpdateTb, IIndexAccessor indexAccessor,
+            IIndexCursor cursor, RangePredicate rangePred) throws HyracksDataException, IndexException {
         if (cloneUpdateTb.getSize() > 0) {
             int[] fieldEndOffsets = cloneUpdateTb.getFieldEndOffsets();
             int srcStart = fieldEndOffsets[0];
@@ -46,7 +46,7 @@
                 //release the cursor/latch
                 cursor.close();
                 //batch update
-                updateBuffer.updateBTree(indexAccessor);
+                updateBuffer.updateIndex(indexAccessor);
                 //try append the to-be-updated tuple again
                 if (!updateBuffer.appendTuple(cloneUpdateTb)) {
                     throw new HyracksDataException("cannot append tuple builder!");
diff --git a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/UpdateBuffer.java b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/UpdateBuffer.java
index 327178c..ea1e02e 100644
--- a/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/UpdateBuffer.java
+++ b/pregelix/pregelix-dataflow-std/src/main/java/edu/uci/ics/pregelix/dataflow/util/UpdateBuffer.java
@@ -25,7 +25,8 @@
 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.data.accessors.FrameTupleReference;
-import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexAccessor;
+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;
 
 /**
@@ -41,10 +42,11 @@
     private final FrameTupleAppender appender;
     private final IHyracksTaskContext ctx;
     private final FrameTupleReference tuple = new FrameTupleReference();
+    private final FrameTupleReference lastTuple = new FrameTupleReference();
     private final int frameSize;
     private IFrameTupleAccessor fta;
 
-    public UpdateBuffer(int numPages, IHyracksTaskContext ctx, int fieldCount) {
+    public UpdateBuffer(int numPages, IHyracksTaskContext ctx, int fieldCount) throws HyracksDataException {
         this.appender = new FrameTupleAppender(ctx.getFrameSize());
         ByteBuffer buffer = ctx.allocateFrame();
         this.buffers.add(buffer);
@@ -55,7 +57,7 @@
         this.fta = new UpdateBufferTupleAccessor(frameSize, fieldCount);
     }
 
-    public UpdateBuffer(IHyracksTaskContext ctx, int fieldCount) {
+    public UpdateBuffer(IHyracksTaskContext ctx, int fieldCount) throws HyracksDataException {
         //by default, the update buffer has 1000 pages
         this(1000, ctx, fieldCount);
     }
@@ -87,7 +89,7 @@
         }
     }
 
-    public void updateBTree(ITreeIndexAccessor bta) throws HyracksDataException, IndexException {
+    public void updateIndex(IIndexAccessor bta) throws HyracksDataException, IndexException {
         // batch update
         for (int i = 0; i <= currentInUse; i++) {
             ByteBuffer buffer = buffers.get(i);
@@ -104,7 +106,22 @@
         appender.reset(buffer, true);
     }
 
-    private void allocate(int index) {
+    /**
+     * return the last updated
+     * 
+     * @throws HyracksDataException
+     */
+    public ITupleReference getLastTuple() throws HyracksDataException {
+        fta.reset(buffers.get(currentInUse));
+        int tupleIndex = fta.getTupleCount() - 1;
+        if (tupleIndex < 0) {
+            return null;
+        }
+        lastTuple.reset(fta, tupleIndex);
+        return lastTuple;
+    }
+
+    private void allocate(int index) throws HyracksDataException {
         if (index >= buffers.size()) {
             buffers.add(ctx.allocateFrame());
         }
diff --git a/pregelix/pregelix-dataflow/pom.xml b/pregelix/pregelix-dataflow/pom.xml
index 962c9f6..1df75ae 100644
--- a/pregelix/pregelix-dataflow/pom.xml
+++ b/pregelix/pregelix-dataflow/pom.xml
@@ -1,17 +1,12 @@
-<!--
- ! 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.
- !-->
+<!-- ! 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. ! -->
 <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>pregelix-dataflow</artifactId>
@@ -21,7 +16,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 
 
@@ -88,68 +83,75 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-api</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow-std-base</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-common</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-btree</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-storage-am-lsm-common</artifactId>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-ipc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
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 86da3bf..ca8f190 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
@@ -38,7 +38,8 @@
 
     @Override
     public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
-            IRecordDescriptorProvider recordDescProvider, final int partition, int nPartitions) {
+            IRecordDescriptorProvider recordDescProvider, final int partition, int nPartitions)
+            throws HyracksDataException {
         return new AbstractUnaryInputUnaryOutputOperatorNodePushable() {
             private ByteBuffer frame = ctx.allocateFrame();
             private boolean complete = false;
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 dc9698b..0f41568 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
@@ -25,4 +25,6 @@
 
     public Configuration createConfiguration(IHyracksTaskContext ctx) throws HyracksDataException;
 
+    public Configuration createConfiguration() throws HyracksDataException;
+
 }
diff --git a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/context/NoBudgetIndexLifecycleManager.java b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/context/NoBudgetIndexLifecycleManager.java
new file mode 100644
index 0000000..5484f78
--- /dev/null
+++ b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/context/NoBudgetIndexLifecycleManager.java
@@ -0,0 +1,194 @@
+/*
+ * 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.pregelix.dataflow.context;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.ArrayList;
+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.api.lifecycle.ILifeCycleComponent;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
+
+public class NoBudgetIndexLifecycleManager implements IIndexLifecycleManager, ILifeCycleComponent {
+
+    private final Map<Long, IndexInfo> indexInfos;
+
+    public NoBudgetIndexLifecycleManager() {
+        this.indexInfos = new HashMap<Long, IndexInfo>();
+    }
+
+    @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();
+        }
+    }
+
+    @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.");
+        }
+
+        if (!info.isOpen) {
+            info.index.activate();
+            info.isOpen = true;
+        }
+        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;
+    }
+
+    @Override
+    public void start() {
+    }
+
+    @Override
+    public void stop(boolean dumpState, OutputStream outputStream) throws IOException {
+        if (dumpState) {
+            dumpState(outputStream);
+        }
+
+        for (IndexInfo i : indexInfos.values()) {
+            if (i.isOpen) {
+                i.index.deactivate();
+            }
+        }
+    }
+
+    private void dumpState(OutputStream os) throws IOException {
+        StringBuilder sb = new StringBuilder();
+
+        String headerFormat = "%-20s %-10s %-20s %-20s %-20s\n";
+        String rowFormat = "%-20d %-10b %-20d %-20s %-20s\n";
+        sb.append(String.format(headerFormat, "ResourceID", "Open", "Reference Count", "Last Access", "Index Name"));
+        IndexInfo ii;
+        for (Map.Entry<Long, IndexInfo> entry : indexInfos.entrySet()) {
+            ii = entry.getValue();
+            sb.append(String.format(rowFormat, entry.getKey(), ii.isOpen, ii.referenceCount, ii.lastAccess, ii.index));
+        }
+        os.write(sb.toString().getBytes());
+    }
+}
\ No newline at end of file
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 b86691c..e25a46a 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
@@ -30,7 +30,9 @@
 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.api.IIndexLifecycleManager;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexLifecycleManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IVirtualBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.MultitenantVirtualBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.impls.VirtualBufferCache;
 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;
@@ -52,6 +54,7 @@
     private final ILocalResourceRepository localResourceRepository;
     private final ResourceIdFactory resourceIdFactory;
     private final IBufferCache bufferCache;
+    private final IVirtualBufferCache vBufferCache;
     private final IFileMapManager fileMapManager;
     private final Map<StateKey, IStateObject> appStateMap = new ConcurrentHashMap<StateKey, IStateObject>();
     private final Map<String, Long> giraphJobIdToSuperStep = new ConcurrentHashMap<String, Long>();
@@ -76,8 +79,11 @@
         bufferCache = new BufferCache(appCtx.getRootContext().getIOManager(), allocator, prs,
                 new PreDelayPageCleanerPolicy(Long.MAX_VALUE), fileMapManager, pageSize, numPages, 1000000,
                 threadFactory);
+        int numPagesInMemComponents = numPages / 8;
+        vBufferCache = new MultitenantVirtualBufferCache(new VirtualBufferCache(new HeapBufferAllocator(), pageSize,
+                numPagesInMemComponents));
         ioManager = (IOManager) appCtx.getRootContext().getIOManager();
-        lcManager = new IndexLifecycleManager();
+        lcManager = new NoBudgetIndexLifecycleManager();
         localResourceRepository = new TransientLocalResourceRepository();
         resourceIdFactory = new ResourceIdFactory(0);
     }
@@ -110,6 +116,10 @@
         return bufferCache;
     }
 
+    public IVirtualBufferCache getVirtualBufferCache() {
+        return vBufferCache;
+    }
+
     public IFileMapProvider getFileMapManager() {
         return fileMapManager;
     }
diff --git a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/util/IterationUtils.java b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/util/IterationUtils.java
index 1d7c979..75f8ed8 100644
--- a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/util/IterationUtils.java
+++ b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/util/IterationUtils.java
@@ -31,6 +31,7 @@
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.pregelix.api.job.PregelixJob;
 import edu.uci.ics.pregelix.api.util.BspUtils;
+import edu.uci.ics.pregelix.api.util.JobStateUtils;
 import edu.uci.ics.pregelix.dataflow.context.RuntimeContext;
 import edu.uci.ics.pregelix.dataflow.context.StateKey;
 
@@ -91,22 +92,6 @@
         }
     }
 
-    public static void writeForceTerminationState(Configuration conf, String jobId) throws HyracksDataException {
-        try {
-            FileSystem dfs = FileSystem.get(conf);
-            String pathStr = IterationUtils.TMP_DIR + jobId + "fterm";
-            Path path = new Path(pathStr);
-            if (!dfs.exists(path)) {
-                FSDataOutputStream output = dfs.create(path, true);
-                output.writeBoolean(true);
-                output.flush();
-                output.close();
-            }
-        } catch (IOException e) {
-            throw new HyracksDataException(e);
-        }
-    }
-
     public static void writeGlobalAggregateValue(Configuration conf, String jobId, Writable agg)
             throws HyracksDataException {
         try {
@@ -136,19 +121,12 @@
         }
     }
 
+    public static void writeForceTerminationState(Configuration conf, String jobId) throws HyracksDataException {
+        JobStateUtils.writeForceTerminationState(conf, jobId);
+    }
+
     public static boolean readForceTerminationState(Configuration conf, String jobId) throws HyracksDataException {
-        try {
-            FileSystem dfs = FileSystem.get(conf);
-            String pathStr = IterationUtils.TMP_DIR + jobId + "fterm";
-            Path path = new Path(pathStr);
-            if (dfs.exists(path)) {
-                return true;
-            } else {
-                return false;
-            }
-        } catch (IOException e) {
-            throw new HyracksDataException(e);
-        }
+        return JobStateUtils.readForceTerminationState(conf, jobId);
     }
 
     public static Writable readGlobalAggregateValue(Configuration conf, String jobId) throws HyracksDataException {
diff --git a/pregelix/pregelix-dist/pom.xml b/pregelix/pregelix-dist/pom.xml
index a868ff2..f0551a6 100644
--- a/pregelix/pregelix-dist/pom.xml
+++ b/pregelix/pregelix-dist/pom.xml
@@ -1,24 +1,19 @@
 <?xml version="1.0"?>
-<!--
- ! 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.
- !-->
+<!-- ! 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. ! -->
 <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>
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 	<artifactId>pregelix-dist</artifactId>
 	<name>pregelix-dist</name>
@@ -38,35 +33,35 @@
 				</configuration>
 			</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>
+				<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>pregelix-core</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-example</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 		</dependency>
 	</dependencies>
 </project>
diff --git a/pregelix/pregelix-dist/src/main/assembly/binary-assembly.xml b/pregelix/pregelix-dist/src/main/assembly/binary-assembly.xml
index ab46338..a0fc2ab 100644
--- a/pregelix/pregelix-dist/src/main/assembly/binary-assembly.xml
+++ b/pregelix/pregelix-dist/src/main/assembly/binary-assembly.xml
@@ -1,17 +1,12 @@
-<!--
- ! 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.
- !-->
+<!-- ! 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. ! -->
 <assembly>
 	<id>binary-assembly</id>
 	<formats>
@@ -31,25 +26,25 @@
 			<fileMode>0755</fileMode>
 		</fileSet>
 		<fileSet>
-                        <directory>../pregelix-core/target/appassembler/lib</directory>
-                        <outputDirectory>lib</outputDirectory>
-                         <includes>
-                                <include>*.jar</include>
-                        </includes>
-                        <fileMode>0755</fileMode>
-                </fileSet>
-		<fileSet>
-                        <directory>../pregelix-example/target</directory>
-                        <outputDirectory>examples</outputDirectory>
-                         <includes>
-        			<include>*with-dependencies.jar</include>
-      			</includes>
+			<directory>../pregelix-core/target/appassembler/lib</directory>
+			<outputDirectory>lib</outputDirectory>
+			<includes>
+				<include>*.jar</include>
+			</includes>
 			<fileMode>0755</fileMode>
-                </fileSet>
+		</fileSet>
 		<fileSet>
-                        <directory>../pregelix-example/data</directory>
-                        <outputDirectory>data</outputDirectory>
-                        <fileMode>0755</fileMode>
-                </fileSet>
+			<directory>../pregelix-example/target</directory>
+			<outputDirectory>examples</outputDirectory>
+			<includes>
+				<include>*with-dependencies.jar</include>
+			</includes>
+			<fileMode>0755</fileMode>
+		</fileSet>
+		<fileSet>
+			<directory>../pregelix-example/data</directory>
+			<outputDirectory>data</outputDirectory>
+			<fileMode>0755</fileMode>
+		</fileSet>
 	</fileSets>
 </assembly>
diff --git a/pregelix/pregelix-dist/src/main/resources/scripts/copylog.sh b/pregelix/pregelix-dist/src/main/resources/scripts/copylog.sh
new file mode 100644
index 0000000..7767b2d
--- /dev/null
+++ b/pregelix/pregelix-dist/src/main/resources/scripts/copylog.sh
@@ -0,0 +1,7 @@
+. conf/cluster.properties
+
+NODEID=`hostname | cut -d '.' -f 1`
+#echo $NODEID
+
+#echo "rsync ${NCLOGS_DIR}/${NODEID}.log ${1}:${2}"
+rsync ${NCLOGS_DIR}/${NODEID}.log ${1}:${2}
diff --git a/pregelix/pregelix-dist/src/main/resources/scripts/dumpAll.sh b/pregelix/pregelix-dist/src/main/resources/scripts/dumpAll.sh
new file mode 100644
index 0000000..e7d45e8
--- /dev/null
+++ b/pregelix/pregelix-dist/src/main/resources/scripts/dumpAll.sh
@@ -0,0 +1,12 @@
+. conf/cluster.properties
+PREGELIX_PATH=`pwd`
+LOG_PATH=$PREGELIX_PATH/logs/
+rm -rf $LOG_PATH
+mkdir $LOG_PATH
+ccname=`hostname`
+
+for i in `cat conf/slaves`
+do
+   ssh $i "cd ${PREGELIX_PATH}; bin/dumptrace.sh; bin/copylog.sh ${ccname} ${LOG_PATH}"
+done
+
diff --git a/pregelix/pregelix-dist/src/main/resources/scripts/dumptrace.sh b/pregelix/pregelix-dist/src/main/resources/scripts/dumptrace.sh
new file mode 100644
index 0000000..9fe55f0
--- /dev/null
+++ b/pregelix/pregelix-dist/src/main/resources/scripts/dumptrace.sh
@@ -0,0 +1,15 @@
+echo `hostname`
+#Kill process
+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
+  USERID=`id | sed 's/^uid=//;s/(.*$//'`
+  PID=`ps -ef|grep ${USERID}|grep java|grep 'Dapp.name=pregelixnc'|awk '{print $2}'`
+fi
+
+echo $PID
+kill -QUIT $PID
diff --git a/pregelix/pregelix-example/pom.xml b/pregelix/pregelix-example/pom.xml
index c2538b1..1066e3b 100644
--- a/pregelix/pregelix-example/pom.xml
+++ b/pregelix/pregelix-example/pom.xml
@@ -21,7 +21,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.7-SNAPSHOT</version>
+		<version>0.2.10-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -107,6 +107,7 @@
 								<include>expect*</include>
 								<include>ClusterController*</include>
 								<include>edu.uci.*</include>
+								<include>dev*</include>
 							</includes>
 						</fileset>
 					</filesets>
@@ -119,7 +120,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-core</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/EarlyTerminationVertex.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/EarlyTerminationVertex.java
new file mode 100644
index 0000000..e369d29
--- /dev/null
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/EarlyTerminationVertex.java
@@ -0,0 +1,106 @@
+/*
+ * 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.pregelix.example;
+
+import java.io.IOException;
+import java.util.Iterator;
+
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapreduce.RecordWriter;
+import org.apache.hadoop.mapreduce.TaskAttemptContext;
+
+import edu.uci.ics.pregelix.api.graph.Vertex;
+import edu.uci.ics.pregelix.api.io.VertexWriter;
+import edu.uci.ics.pregelix.api.io.text.TextVertexOutputFormat;
+import edu.uci.ics.pregelix.api.io.text.TextVertexOutputFormat.TextVertexWriter;
+import edu.uci.ics.pregelix.api.job.PregelixJob;
+import edu.uci.ics.pregelix.example.client.Client;
+import edu.uci.ics.pregelix.example.data.VLongNormalizedKeyComputer;
+import edu.uci.ics.pregelix.example.inputformat.TextPageRankInputFormat;
+import edu.uci.ics.pregelix.example.io.VLongWritable;
+
+/**
+ * Demonstrates the basic Pregel PageRank implementation.
+ */
+public class EarlyTerminationVertex extends Vertex<VLongWritable, VLongWritable, VLongWritable, VLongWritable> {
+    private VLongWritable tempValue = new VLongWritable();
+
+    @Override
+    public void compute(Iterator<VLongWritable> msgIterator) {
+        if (getSuperstep() == 1) {
+            if (getVertexId().get() % 4 == 2) {
+                terminatePartition();
+            } else {
+                tempValue.set(1);
+                setVertexValue(tempValue);
+            }
+        }
+        if (getSuperstep() == 2) {
+            if (getVertexId().get() % 4 == 3) {
+                terminatePartition();
+            } else {
+                tempValue.set(2);
+                setVertexValue(tempValue);
+                voteToHalt();
+            }
+        }
+    }
+
+    @Override
+    public String toString() {
+        return getVertexId() + " " + getVertexValue();
+    }
+
+    /**
+     * Simple VertexWriter that support
+     */
+    public static class SimpleEarlyTerminattionVertexWriter extends
+            TextVertexWriter<VLongWritable, VLongWritable, VLongWritable> {
+        public SimpleEarlyTerminattionVertexWriter(RecordWriter<Text, Text> lineRecordWriter) {
+            super(lineRecordWriter);
+        }
+
+        @Override
+        public void writeVertex(Vertex<VLongWritable, VLongWritable, VLongWritable, ?> vertex) throws IOException,
+                InterruptedException {
+            getRecordWriter().write(new Text(vertex.getVertexId().toString()),
+                    new Text(vertex.getVertexValue().toString()));
+        }
+    }
+
+    public static class SimpleEarlyTerminattionVertexOutputFormat extends
+            TextVertexOutputFormat<VLongWritable, VLongWritable, VLongWritable> {
+
+        @Override
+        public VertexWriter<VLongWritable, VLongWritable, VLongWritable> createVertexWriter(TaskAttemptContext context)
+                throws IOException, InterruptedException {
+            RecordWriter<Text, Text> recordWriter = textOutputFormat.getRecordWriter(context);
+            return new SimpleEarlyTerminattionVertexWriter(recordWriter);
+        }
+
+    }
+
+    public static void main(String[] args) throws Exception {
+        PregelixJob job = new PregelixJob(EarlyTerminationVertex.class.getSimpleName());
+        job.setVertexClass(EarlyTerminationVertex.class);
+        job.setVertexInputFormatClass(TextPageRankInputFormat.class);
+        job.setVertexOutputFormatClass(SimpleEarlyTerminattionVertexOutputFormat.class);
+        job.setNoramlizedKeyComputerClass(VLongNormalizedKeyComputer.class);
+        job.setDynamicVertexValueSize(true);
+        Client.run(args, job);
+    }
+
+}
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/GraphMutationVertex.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/GraphMutationVertex.java
index 7cf8408..7fae776 100644
--- a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/GraphMutationVertex.java
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/GraphMutationVertex.java
@@ -18,7 +18,6 @@
 import java.io.IOException;
 import java.util.Iterator;
 
-import org.apache.hadoop.io.DoubleWritable;
 import org.apache.hadoop.io.FloatWritable;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.mapreduce.RecordWriter;
@@ -32,6 +31,7 @@
 import edu.uci.ics.pregelix.example.client.Client;
 import edu.uci.ics.pregelix.example.data.VLongNormalizedKeyComputer;
 import edu.uci.ics.pregelix.example.inputformat.TextPageRankInputFormat;
+import edu.uci.ics.pregelix.example.io.DoubleWritable;
 import edu.uci.ics.pregelix.example.io.VLongWritable;
 
 /**
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/MessageOverflowFixedsizeVertex.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/MessageOverflowFixedsizeVertex.java
new file mode 100644
index 0000000..6c3c752
--- /dev/null
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/MessageOverflowFixedsizeVertex.java
@@ -0,0 +1,113 @@
+/*
+ * 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.pregelix.example;
+
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.Random;
+
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapreduce.RecordWriter;
+import org.apache.hadoop.mapreduce.TaskAttemptContext;
+
+import edu.uci.ics.pregelix.api.graph.Vertex;
+import edu.uci.ics.pregelix.api.io.VertexWriter;
+import edu.uci.ics.pregelix.api.io.text.TextVertexOutputFormat;
+import edu.uci.ics.pregelix.api.io.text.TextVertexOutputFormat.TextVertexWriter;
+import edu.uci.ics.pregelix.api.job.PregelixJob;
+import edu.uci.ics.pregelix.example.client.Client;
+import edu.uci.ics.pregelix.example.data.VLongNormalizedKeyComputer;
+import edu.uci.ics.pregelix.example.inputformat.TextPageRankInputFormat;
+import edu.uci.ics.pregelix.example.io.LongWritable;
+import edu.uci.ics.pregelix.example.io.VLongWritable;
+
+/**
+ * Demonstrates the basic Pregel PageRank implementation.
+ */
+public class MessageOverflowFixedsizeVertex extends Vertex<VLongWritable, LongWritable, VLongWritable, LongWritable> {
+
+    private LongWritable outputMsg = new LongWritable(1);
+    private Random rand = new Random(System.currentTimeMillis());
+    private LongWritable tmpVertexValue = new LongWritable(0);
+    private int numOfMsgClones = 10000;
+
+    @Override
+    public void compute(Iterator<LongWritable> msgIterator) {
+        if (getSuperstep() == 1) {
+            for (int i = 0; i < numOfMsgClones; i++) {
+                outputMsg.set(Math.abs(rand.nextLong()));
+                sendMsgToAllEdges(outputMsg);
+            }
+            tmpVertexValue.set(0);
+            setVertexValue(tmpVertexValue);
+        }
+        if (getSuperstep() == 2) {
+            long numOfMsg = getVertexValue().get();
+            while (msgIterator.hasNext()) {
+                msgIterator.next();
+                numOfMsg++;
+            }
+            tmpVertexValue.set(numOfMsg);
+            setVertexValue(tmpVertexValue);
+            voteToHalt();
+        }
+    }
+
+    @Override
+    public String toString() {
+        return getVertexId() + " " + getVertexValue();
+    }
+
+    /**
+     * Simple VertexWriter that support
+     */
+    public static class SimpleMessageOverflowVertexWriter extends
+            TextVertexWriter<VLongWritable, LongWritable, VLongWritable> {
+        public SimpleMessageOverflowVertexWriter(RecordWriter<Text, Text> lineRecordWriter) {
+            super(lineRecordWriter);
+        }
+
+        @Override
+        public void writeVertex(Vertex<VLongWritable, LongWritable, VLongWritable, ?> vertex) throws IOException,
+                InterruptedException {
+            getRecordWriter().write(new Text(vertex.getVertexId().toString()),
+                    new Text(vertex.getVertexValue().toString()));
+        }
+    }
+
+    public static class SimpleMessageOverflowVertexOutputFormat extends
+            TextVertexOutputFormat<VLongWritable, LongWritable, VLongWritable> {
+
+        @Override
+        public VertexWriter<VLongWritable, LongWritable, VLongWritable> createVertexWriter(TaskAttemptContext context)
+                throws IOException, InterruptedException {
+            RecordWriter<Text, Text> recordWriter = textOutputFormat.getRecordWriter(context);
+            return new SimpleMessageOverflowVertexWriter(recordWriter);
+        }
+
+    }
+
+    public static void main(String[] args) throws Exception {
+        PregelixJob job = new PregelixJob(MessageOverflowFixedsizeVertex.class.getSimpleName());
+        job.setVertexClass(MessageOverflowFixedsizeVertex.class);
+        job.setVertexInputFormatClass(TextPageRankInputFormat.class);
+        job.setVertexOutputFormatClass(SimpleMessageOverflowVertexOutputFormat.class);
+        job.setNoramlizedKeyComputerClass(VLongNormalizedKeyComputer.class);
+        job.setDynamicVertexValueSize(true);
+        Client.run(args, job);
+    }
+
+}
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/MessageOverflowVertex.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/MessageOverflowVertex.java
new file mode 100644
index 0000000..d0221bf
--- /dev/null
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/MessageOverflowVertex.java
@@ -0,0 +1,125 @@
+/*
+ * 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.pregelix.example;
+
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.Random;
+
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapreduce.RecordWriter;
+import org.apache.hadoop.mapreduce.TaskAttemptContext;
+
+import edu.uci.ics.pregelix.api.graph.Vertex;
+import edu.uci.ics.pregelix.api.io.VertexWriter;
+import edu.uci.ics.pregelix.api.io.text.TextVertexOutputFormat;
+import edu.uci.ics.pregelix.api.io.text.TextVertexOutputFormat.TextVertexWriter;
+import edu.uci.ics.pregelix.api.job.PregelixJob;
+import edu.uci.ics.pregelix.example.client.Client;
+import edu.uci.ics.pregelix.example.data.VLongNormalizedKeyComputer;
+import edu.uci.ics.pregelix.example.inputformat.TextPageRankInputFormat;
+import edu.uci.ics.pregelix.example.io.VLongWritable;
+
+/**
+ * Demonstrates the basic Pregel PageRank implementation.
+ */
+public class MessageOverflowVertex extends Vertex<VLongWritable, VLongWritable, VLongWritable, VLongWritable> {
+
+    private VLongWritable outputMsg = new VLongWritable(1);
+    private Random rand = new Random(System.currentTimeMillis());
+    private VLongWritable tmpVertexValue = new VLongWritable(0);
+    private int numOfMsgClones = 10000;
+    private int numIncomingMsgs = 0;
+
+    @Override
+    public void open() {
+        if (getSuperstep() == 2) {
+            numIncomingMsgs = 0;
+        }
+    }
+
+    @Override
+    public void compute(Iterator<VLongWritable> msgIterator) {
+        if (getSuperstep() == 1) {
+            for (int i = 0; i < numOfMsgClones; i++) {
+                outputMsg.set(Math.abs(rand.nextLong()));
+                sendMsgToAllEdges(outputMsg);
+            }
+            tmpVertexValue.set(0);
+            setVertexValue(tmpVertexValue);
+        }
+        if (getSuperstep() == 2) {
+            while (msgIterator.hasNext()) {
+                msgIterator.next();
+                numIncomingMsgs++;
+            }
+        }
+    }
+
+    @Override
+    public void close() {
+        if (getSuperstep() == 2) {
+            tmpVertexValue.set(numIncomingMsgs);
+            setVertexValue(tmpVertexValue);
+            voteToHalt();
+        }
+    }
+
+    @Override
+    public String toString() {
+        return getVertexId() + " " + getVertexValue();
+    }
+
+    /**
+     * Simple VertexWriter that support
+     */
+    public static class SimpleMessageOverflowVertexWriter extends
+            TextVertexWriter<VLongWritable, VLongWritable, VLongWritable> {
+        public SimpleMessageOverflowVertexWriter(RecordWriter<Text, Text> lineRecordWriter) {
+            super(lineRecordWriter);
+        }
+
+        @Override
+        public void writeVertex(Vertex<VLongWritable, VLongWritable, VLongWritable, ?> vertex) throws IOException,
+                InterruptedException {
+            getRecordWriter().write(new Text(vertex.getVertexId().toString()),
+                    new Text(vertex.getVertexValue().toString()));
+        }
+    }
+
+    public static class SimpleMessageOverflowVertexOutputFormat extends
+            TextVertexOutputFormat<VLongWritable, VLongWritable, VLongWritable> {
+
+        @Override
+        public VertexWriter<VLongWritable, VLongWritable, VLongWritable> createVertexWriter(TaskAttemptContext context)
+                throws IOException, InterruptedException {
+            RecordWriter<Text, Text> recordWriter = textOutputFormat.getRecordWriter(context);
+            return new SimpleMessageOverflowVertexWriter(recordWriter);
+        }
+
+    }
+
+    public static void main(String[] args) throws Exception {
+        PregelixJob job = new PregelixJob(MessageOverflowVertex.class.getSimpleName());
+        job.setVertexClass(MessageOverflowVertex.class);
+        job.setVertexInputFormatClass(TextPageRankInputFormat.class);
+        job.setVertexOutputFormatClass(SimpleMessageOverflowVertexOutputFormat.class);
+        job.setNoramlizedKeyComputerClass(VLongNormalizedKeyComputer.class);
+        job.setDynamicVertexValueSize(true);
+        Client.run(args, job);
+    }
+
+}
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/PageRankVertex.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/PageRankVertex.java
index 8664667..a866c1c 100644
--- a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/PageRankVertex.java
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/PageRankVertex.java
@@ -21,7 +21,6 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import org.apache.hadoop.io.DoubleWritable;
 import org.apache.hadoop.io.FloatWritable;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.mapreduce.InputSplit;
@@ -45,6 +44,7 @@
 import edu.uci.ics.pregelix.example.client.Client;
 import edu.uci.ics.pregelix.example.data.VLongNormalizedKeyComputer;
 import edu.uci.ics.pregelix.example.inputformat.TextPageRankInputFormat;
+import edu.uci.ics.pregelix.example.io.DoubleWritable;
 import edu.uci.ics.pregelix.example.io.VLongWritable;
 
 /**
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/ReachabilityVertex.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/ReachabilityVertex.java
index 6a42636..1bb33b8 100644
--- a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/ReachabilityVertex.java
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/ReachabilityVertex.java
@@ -22,7 +22,6 @@
 import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.io.ByteWritable;
 import org.apache.hadoop.io.FloatWritable;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.mapreduce.RecordWriter;
@@ -42,6 +41,7 @@
 import edu.uci.ics.pregelix.example.client.Client;
 import edu.uci.ics.pregelix.example.data.VLongNormalizedKeyComputer;
 import edu.uci.ics.pregelix.example.inputformat.TextReachibilityVertexInputFormat;
+import edu.uci.ics.pregelix.example.io.ByteWritable;
 import edu.uci.ics.pregelix.example.io.VLongWritable;
 
 /**
@@ -116,7 +116,7 @@
     }
 
     @Override
-    public void compute(Iterator<ByteWritable> msgIterator) {
+    public void compute(Iterator<ByteWritable> msgIterator) throws Exception {
         if (sourceId < 0) {
             sourceId = getContext().getConfiguration().getLong(SOURCE_ID, SOURCE_ID_DEFAULT);
         }
@@ -171,13 +171,20 @@
         return getVertexId() + " " + getVertexValue();
     }
 
-    private void signalTerminate() {
-        Configuration conf = getContext().getConfiguration();
-        try {
-            IterationUtils.writeForceTerminationState(conf, BspUtils.getJobId(conf));
-            writeReachibilityResult(conf, true);
-        } catch (Exception e) {
-            throw new IllegalStateException(e);
+    private void signalTerminate() throws Exception {
+        writeReachibilityResult(getContext().getConfiguration(), true);
+        terminateJob();
+    }
+
+    private void writeReachibilityResult(Configuration conf, boolean terminate) throws IOException {
+        FileSystem dfs = FileSystem.get(conf);
+        String pathStr = IterationUtils.TMP_DIR + BspUtils.getJobId(conf) + "reachibility";
+        Path path = new Path(pathStr);
+        if (!dfs.exists(path)) {
+            FSDataOutputStream output = dfs.create(path, true);
+            output.writeBoolean(terminate);
+            output.flush();
+            output.close();
         }
     }
 
@@ -187,22 +194,6 @@
         }
     }
 
-    private void writeReachibilityResult(Configuration conf, boolean terminate) {
-        try {
-            FileSystem dfs = FileSystem.get(conf);
-            String pathStr = IterationUtils.TMP_DIR + BspUtils.getJobId(conf) + "reachibility";
-            Path path = new Path(pathStr);
-            if (!dfs.exists(path)) {
-                FSDataOutputStream output = dfs.create(path, true);
-                output.writeBoolean(terminate);
-                output.flush();
-                output.close();
-            }
-        } catch (IOException e) {
-            throw new IllegalStateException(e);
-        }
-    }
-
     private static boolean readReachibilityResult(Configuration conf) {
         try {
             FileSystem dfs = FileSystem.get(conf);
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/ShortestPathsVertex.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/ShortestPathsVertex.java
index 41c26b1..648f168 100644
--- a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/ShortestPathsVertex.java
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/ShortestPathsVertex.java
@@ -19,7 +19,6 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import org.apache.hadoop.io.DoubleWritable;
 import org.apache.hadoop.io.FloatWritable;
 
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
@@ -32,6 +31,7 @@
 import edu.uci.ics.pregelix.example.client.Client;
 import edu.uci.ics.pregelix.example.data.VLongNormalizedKeyComputer;
 import edu.uci.ics.pregelix.example.inputformat.TextShortestPathsInputFormat;
+import edu.uci.ics.pregelix.example.io.DoubleWritable;
 import edu.uci.ics.pregelix.example.io.VLongWritable;
 
 /**
@@ -127,7 +127,7 @@
         }
         voteToHalt();
     }
-    
+
     @Override
     public String toString() {
         return getVertexId() + " " + getVertexValue();
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/client/Client.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/client/Client.java
index 6cb1f4a..f60387a 100644
--- a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/client/Client.java
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/client/Client.java
@@ -82,7 +82,7 @@
         String[] inputs = options.inputPaths.split(";");
         FileInputFormat.setInputPaths(job, inputs[0]);
         for (int i = 1; i < inputs.length; i++)
-            FileInputFormat.addInputPaths(job, inputs[0]);
+            FileInputFormat.addInputPaths(job, inputs[i]);
         FileOutputFormat.setOutputPath(job, new Path(options.outputPath));
         job.getConfiguration().setLong(PregelixJob.NUM_VERTICE, options.numVertices);
         job.getConfiguration().setLong(PregelixJob.NUM_EDGES, options.numEdges);
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 f46d9c3..67681d3 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
@@ -18,7 +18,6 @@
 import java.util.ArrayList;
 import java.util.List;
 
-import org.apache.hadoop.io.DoubleWritable;
 import org.apache.hadoop.io.FloatWritable;
 import org.apache.hadoop.io.LongWritable;
 import org.apache.hadoop.io.Text;
@@ -31,6 +30,7 @@
 import edu.uci.ics.pregelix.api.io.text.TextVertexInputFormat;
 import edu.uci.ics.pregelix.api.io.text.TextVertexInputFormat.TextVertexReader;
 import edu.uci.ics.pregelix.api.util.BspUtils;
+import edu.uci.ics.pregelix.example.io.DoubleWritable;
 import edu.uci.ics.pregelix.example.io.VLongWritable;
 
 public class TextPageRankInputFormat extends
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/inputformat/TextShortestPathsInputFormat.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/inputformat/TextShortestPathsInputFormat.java
index 013a063..3ea4a9f 100644
--- a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/inputformat/TextShortestPathsInputFormat.java
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/inputformat/TextShortestPathsInputFormat.java
@@ -18,7 +18,6 @@
 import java.util.ArrayList;
 import java.util.List;
 
-import org.apache.hadoop.io.DoubleWritable;
 import org.apache.hadoop.io.FloatWritable;
 import org.apache.hadoop.io.LongWritable;
 import org.apache.hadoop.io.Text;
@@ -31,6 +30,7 @@
 import edu.uci.ics.pregelix.api.io.text.TextVertexInputFormat;
 import edu.uci.ics.pregelix.api.io.text.TextVertexInputFormat.TextVertexReader;
 import edu.uci.ics.pregelix.api.util.BspUtils;
+import edu.uci.ics.pregelix.example.io.DoubleWritable;
 import edu.uci.ics.pregelix.example.io.VLongWritable;
 
 public class TextShortestPathsInputFormat extends
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/BooleanWritable.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/BooleanWritable.java
new file mode 100644
index 0000000..c943288
--- /dev/null
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/BooleanWritable.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.pregelix.example.io;
+
+import edu.uci.ics.pregelix.api.io.WritableSizable;
+
+/**
+ * Writable for Boolean values.
+ */
+public class BooleanWritable extends org.apache.hadoop.io.BooleanWritable implements WritableSizable {
+
+    public BooleanWritable(boolean value) {
+        super(value);
+    }
+
+    public BooleanWritable() {
+        super();
+    }
+
+    public int sizeInBytes() {
+        return 1;
+    }
+
+}
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/ByteWritable.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/ByteWritable.java
new file mode 100644
index 0000000..2a1fd22
--- /dev/null
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/ByteWritable.java
@@ -0,0 +1,35 @@
+/*
+ * 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.pregelix.example.io;
+
+import edu.uci.ics.pregelix.api.io.WritableSizable;
+
+/**
+ * Writable for Byte values.
+ */
+public class ByteWritable extends org.apache.hadoop.io.ByteWritable implements WritableSizable {
+
+    public ByteWritable(byte value) {
+        super(value);
+    }
+
+    public ByteWritable() {
+        super();
+    }
+
+    public int sizeInBytes() {
+        return 1;
+    }
+}
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/BytesWritable.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/BytesWritable.java
new file mode 100644
index 0000000..04a5549
--- /dev/null
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/BytesWritable.java
@@ -0,0 +1,37 @@
+/*
+ * 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.pregelix.example.io;
+
+import edu.uci.ics.pregelix.api.io.WritableSizable;
+
+/**
+ * Writable for Bytes values.
+ */
+public class BytesWritable extends org.apache.hadoop.io.BytesWritable implements WritableSizable {
+
+    public BytesWritable(byte[] value) {
+        super(value);
+    }
+
+    public BytesWritable() {
+        super();
+    }
+
+    @Override
+    public int sizeInBytes() {
+        return getLength() + 4; // add the integer size slot
+    }
+
+}
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/DoubleWritable.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/DoubleWritable.java
new file mode 100644
index 0000000..ebc7fe4
--- /dev/null
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/DoubleWritable.java
@@ -0,0 +1,37 @@
+/*
+ * 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.pregelix.example.io;
+
+import edu.uci.ics.pregelix.api.io.WritableSizable;
+
+/**
+ * Writable for Double values.
+ */
+public class DoubleWritable extends org.apache.hadoop.io.DoubleWritable implements WritableSizable {
+
+    public DoubleWritable(double value) {
+        super(value);
+    }
+
+    public DoubleWritable() {
+        super();
+    }
+
+    public int sizeInBytes() {
+        return 8;
+    }
+
+}
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/FloatWritable.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/FloatWritable.java
new file mode 100644
index 0000000..6772b0a
--- /dev/null
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/FloatWritable.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.pregelix.example.io;
+
+import edu.uci.ics.pregelix.api.io.WritableSizable;
+
+/** A WritableComparable for floats. */
+public class FloatWritable extends org.apache.hadoop.io.FloatWritable implements WritableSizable {
+
+    public FloatWritable(float value) {
+        super(value);
+    }
+
+    public FloatWritable() {
+        super();
+    }
+
+    public int sizeInBytes() {
+        return 4;
+    }
+}
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/IntWritable.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/IntWritable.java
new file mode 100644
index 0000000..4944232
--- /dev/null
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/IntWritable.java
@@ -0,0 +1,35 @@
+/*
+ * 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.pregelix.example.io;
+
+import edu.uci.ics.pregelix.api.io.WritableSizable;
+
+/** A WritableComparable for ints. */
+public class IntWritable extends org.apache.hadoop.io.IntWritable implements WritableSizable {
+
+    public IntWritable(int value) {
+        super(value);
+    }
+
+    public IntWritable() {
+        super();
+    }
+
+    public int sizeInBytes() {
+        return 4;
+    }
+
+}
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/LongWritable.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/LongWritable.java
new file mode 100644
index 0000000..3ecab79
--- /dev/null
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/LongWritable.java
@@ -0,0 +1,35 @@
+/*
+ * 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.pregelix.example.io;
+
+import edu.uci.ics.pregelix.api.io.WritableSizable;
+
+/** A WritableComparable for longs. */
+public class LongWritable extends org.apache.hadoop.io.LongWritable implements WritableSizable {
+
+    public LongWritable(long value) {
+        super(value);
+    }
+
+    public LongWritable() {
+        super();
+    }
+
+    public int sizeInBytes() {
+        return 8;
+    }
+
+}
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/NullWritable.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/NullWritable.java
new file mode 100644
index 0000000..a2f184a
--- /dev/null
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/NullWritable.java
@@ -0,0 +1,89 @@
+/*
+ * 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.pregelix.example.io;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+
+import org.apache.hadoop.io.WritableComparable;
+import org.apache.hadoop.io.WritableComparator;
+
+import edu.uci.ics.pregelix.api.io.WritableSizable;
+
+/** Singleton Writable with no data. */
+@SuppressWarnings("rawtypes")
+public class NullWritable implements WritableComparable, WritableSizable {
+
+    private static final NullWritable THIS = new NullWritable();
+
+    private NullWritable() {
+    } // no public ctor
+
+    /** Returns the single instance of this class. */
+    public static NullWritable get() {
+        return THIS;
+    }
+
+    public String toString() {
+        return "(null)";
+    }
+
+    public int sizeInBytes() {
+        return 0;
+    }
+
+    public int hashCode() {
+        return 0;
+    }
+
+    public int compareTo(Object other) {
+        if (!(other instanceof NullWritable)) {
+            throw new ClassCastException("can't compare " + other.getClass().getName() + " to NullWritable");
+        }
+        return 0;
+    }
+
+    public boolean equals(Object other) {
+        return other instanceof NullWritable;
+    }
+
+    public void readFields(DataInput in) throws IOException {
+    }
+
+    public void write(DataOutput out) throws IOException {
+    }
+
+    /** A Comparator &quot;optimized&quot; for NullWritable. */
+    public static class Comparator extends WritableComparator {
+        public Comparator() {
+            super(NullWritable.class);
+        }
+
+        /**
+         * Compare the buffers in serialized form.
+         */
+        public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
+            assert 0 == l1;
+            assert 0 == l2;
+            return 0;
+        }
+    }
+
+    static { // register this comparator
+        WritableComparator.define(NullWritable.class, new Comparator());
+    }
+}
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/VIntWritable.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/VIntWritable.java
new file mode 100644
index 0000000..94df74f
--- /dev/null
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/VIntWritable.java
@@ -0,0 +1,89 @@
+/*
+ * 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.pregelix.example.io;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+
+import org.apache.hadoop.io.WritableComparable;
+import org.apache.hadoop.io.WritableUtils;
+
+import edu.uci.ics.pregelix.api.io.WritableSizable;
+
+/**
+ * A WritableComparable for integer values stored in variable-length format.
+ * Such values take between one and five bytes. Smaller values take fewer bytes.
+ * 
+ * @see org.apache.hadoop.io.WritableUtils#readVInt(DataInput)
+ */
+@SuppressWarnings("rawtypes")
+public class VIntWritable implements WritableComparable, WritableSizable {
+    private int value;
+
+    public VIntWritable() {
+    }
+
+    public VIntWritable(int value) {
+        set(value);
+    }
+
+    public int sizeInBytes() {
+        return 5;
+    }
+
+    /** Set the value of this VIntWritable. */
+    public void set(int value) {
+        this.value = value;
+    }
+
+    /** Return the value of this VIntWritable. */
+    public int get() {
+        return value;
+    }
+
+    public void readFields(DataInput in) throws IOException {
+        value = WritableUtils.readVInt(in);
+    }
+
+    public void write(DataOutput out) throws IOException {
+        WritableUtils.writeVInt(out, value);
+    }
+
+    /** Returns true iff <code>o</code> is a VIntWritable with the same value. */
+    public boolean equals(Object o) {
+        if (!(o instanceof VIntWritable))
+            return false;
+        VIntWritable other = (VIntWritable) o;
+        return this.value == other.value;
+    }
+
+    public int hashCode() {
+        return value;
+    }
+
+    /** Compares two VIntWritables. */
+    public int compareTo(Object o) {
+        int thisValue = this.value;
+        int thatValue = ((VIntWritable) o).value;
+        return (thisValue < thatValue ? -1 : (thisValue == thatValue ? 0 : 1));
+    }
+
+    public String toString() {
+        return Integer.toString(value);
+    }
+
+}
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/VLongWritable.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/VLongWritable.java
index e12d930..ec1109f 100644
--- a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/VLongWritable.java
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/io/VLongWritable.java
@@ -22,16 +22,26 @@
 import org.apache.hadoop.io.WritableComparable;
 import org.apache.hadoop.io.WritableComparator;
 
+import edu.uci.ics.pregelix.api.io.WritableSizable;
 import edu.uci.ics.pregelix.api.util.SerDeUtils;
 
 /**
  * A WritableComparable for longs in a variable-length format. Such values take
- * between one and five bytes. Smaller values take fewer bytes.
+ * between one and nine bytes. Smaller values take fewer bytes.
  * 
  * @see org.apache.hadoop.io.WritableUtils#readVLong(DataInput)
  */
 @SuppressWarnings("rawtypes")
-public class VLongWritable implements WritableComparable {
+public class VLongWritable implements WritableComparable, WritableSizable {
+    private static long ONE_BYTE_MAX = 2 ^ 7 - 1;
+    private static long TWO_BYTE_MAX = 2 ^ 14 - 1;
+    private static long THREE_BYTE_MAX = 2 ^ 21 - 1;
+    private static long FOUR_BYTE_MAX = 2 ^ 28 - 1;
+    private static long FIVE_BYTE_MAX = 2 ^ 35 - 1;;
+    private static long SIX_BYTE_MAX = 2 ^ 42 - 1;;
+    private static long SEVEN_BYTE_MAX = 2 ^ 49 - 1;;
+    private static long EIGHT_BYTE_MAX = 2 ^ 54 - 1;;
+
     private long value;
 
     public VLongWritable() {
@@ -41,6 +51,28 @@
         set(value);
     }
 
+    public int sizeInBytes() {
+        if (value >= 0 && value <= ONE_BYTE_MAX) {
+            return 1;
+        } else if (value > ONE_BYTE_MAX && value <= TWO_BYTE_MAX) {
+            return 2;
+        } else if (value > TWO_BYTE_MAX && value <= THREE_BYTE_MAX) {
+            return 3;
+        } else if (value > THREE_BYTE_MAX && value <= FOUR_BYTE_MAX) {
+            return 4;
+        } else if (value > FOUR_BYTE_MAX && value <= FIVE_BYTE_MAX) {
+            return 5;
+        } else if (value > FIVE_BYTE_MAX && value <= SIX_BYTE_MAX) {
+            return 6;
+        } else if (value > SIX_BYTE_MAX && value <= SEVEN_BYTE_MAX) {
+            return 7;
+        } else if (value > SEVEN_BYTE_MAX && value <= EIGHT_BYTE_MAX) {
+            return 8;
+        } else {
+            return 9;
+        }
+    }
+
     /** Set the value of this LongWritable. */
     public void set(long value) {
         this.value = value;
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/maximalclique/AdjacencyListWritable.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/maximalclique/AdjacencyListWritable.java
index 0a58c00..dd86a45 100644
--- a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/maximalclique/AdjacencyListWritable.java
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/maximalclique/AdjacencyListWritable.java
@@ -23,14 +23,13 @@
 import java.util.Set;
 import java.util.TreeSet;
 
-import org.apache.hadoop.io.Writable;
-
+import edu.uci.ics.pregelix.api.io.WritableSizable;
 import edu.uci.ics.pregelix.example.io.VLongWritable;
 
 /**
  * The adjacency list contains <src, list-of-neighbors>
  */
-public class AdjacencyListWritable implements Writable {
+public class AdjacencyListWritable implements WritableSizable {
 
     private VLongWritable sourceVertex = new VLongWritable();
     private Set<VLongWritable> destinationVertexes = new TreeSet<VLongWritable>();
@@ -96,4 +95,13 @@
         return destinationVertexes.contains(v);
     }
 
+    @Override
+    public int sizeInBytes() {
+        int size = 4; // the size of list bytes
+        for (VLongWritable dest : destinationVertexes) {
+            size += dest.sizeInBytes();
+        }
+        return size;
+    }
+
 }
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 69c5612..13cec61 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
@@ -23,10 +23,16 @@
 import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
 
 import edu.uci.ics.pregelix.api.job.PregelixJob;
+import edu.uci.ics.pregelix.api.util.DefaultVertexPartitioner;
 import edu.uci.ics.pregelix.example.ConnectedComponentsVertex;
 import edu.uci.ics.pregelix.example.ConnectedComponentsVertex.SimpleConnectedComponentsVertexOutputFormat;
+import edu.uci.ics.pregelix.example.EarlyTerminationVertex;
+import edu.uci.ics.pregelix.example.EarlyTerminationVertex.SimpleEarlyTerminattionVertexOutputFormat;
 import edu.uci.ics.pregelix.example.GraphMutationVertex;
 import edu.uci.ics.pregelix.example.GraphMutationVertex.SimpleGraphMutationVertexOutputFormat;
+import edu.uci.ics.pregelix.example.MessageOverflowFixedsizeVertex;
+import edu.uci.ics.pregelix.example.MessageOverflowVertex;
+import edu.uci.ics.pregelix.example.MessageOverflowVertex.SimpleMessageOverflowVertexOutputFormat;
 import edu.uci.ics.pregelix.example.PageRankVertex;
 import edu.uci.ics.pregelix.example.PageRankVertex.SimplePageRankVertexOutputFormat;
 import edu.uci.ics.pregelix.example.PageRankVertex.SimulatedPageRankVertexInputFormat;
@@ -80,6 +86,7 @@
         job.setVertexOutputFormatClass(SimplePageRankVertexOutputFormat.class);
         job.setMessageCombinerClass(PageRankVertex.SimpleSumCombiner.class);
         job.setNoramlizedKeyComputerClass(VLongNormalizedKeyComputer.class);
+        job.setVertexPartitionerClass(DefaultVertexPartitioner.class);
         FileInputFormat.setInputPaths(job, HDFS_INPUTPATH2);
         FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH2));
         job.getConfiguration().setLong(PregelixJob.NUM_VERTICE, 23);
@@ -132,6 +139,7 @@
         job.setVertexOutputFormatClass(SimpleConnectedComponentsVertexOutputFormat.class);
         job.setMessageCombinerClass(ConnectedComponentsVertex.SimpleMinCombiner.class);
         job.setNoramlizedKeyComputerClass(VLongNormalizedKeyComputer.class);
+        job.setVertexPartitionerClass(DefaultVertexPartitioner.class);
         FileInputFormat.setInputPaths(job, HDFS_INPUTPATH2);
         FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH2));
         job.getConfiguration().setLong(PregelixJob.NUM_VERTICE, 23);
@@ -230,11 +238,12 @@
         job.setVertexInputFormatClass(TextMaximalCliqueInputFormat.class);
         job.setVertexOutputFormatClass(MaximalCliqueVertexOutputFormat.class);
         job.setNoramlizedKeyComputerClass(VLongNormalizedKeyComputer.class);
+        job.setLSMStorage(true);
         FileInputFormat.setInputPaths(job, HDFS_INPUTPATH3);
         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);
@@ -243,11 +252,12 @@
         job.setVertexInputFormatClass(TextMaximalCliqueInputFormat.class);
         job.setVertexOutputFormatClass(MaximalCliqueVertexOutputFormat.class);
         job.setNoramlizedKeyComputerClass(VLongNormalizedKeyComputer.class);
+        job.setLSMStorage(true);
         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);
@@ -256,6 +266,8 @@
         job.setVertexInputFormatClass(TextMaximalCliqueInputFormat.class);
         job.setVertexOutputFormatClass(MaximalCliqueVertexOutputFormat.class);
         job.setNoramlizedKeyComputerClass(VLongNormalizedKeyComputer.class);
+        job.setVertexPartitionerClass(DefaultVertexPartitioner.class);
+        job.setLSMStorage(true);
         FileInputFormat.setInputPaths(job, HDFS_INPUTPATH5);
         FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH3));
         job.getConfiguration().writeXml(new FileOutputStream(new File(outputPath)));
@@ -273,6 +285,59 @@
         job.getConfiguration().writeXml(new FileOutputStream(new File(outputPath)));
     }
 
+    private static void generateMessageOverflowFixedsizeJob(String jobName, String outputPath) throws IOException {
+        PregelixJob job = new PregelixJob(jobName);
+        job.setVertexClass(MessageOverflowFixedsizeVertex.class);
+        job.setVertexInputFormatClass(TextPageRankInputFormat.class);
+        job.setVertexOutputFormatClass(MessageOverflowFixedsizeVertex.SimpleMessageOverflowVertexOutputFormat.class);
+        job.setFrameSize(2048);
+        FileInputFormat.setInputPaths(job, HDFS_INPUTPATH);
+        FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH));
+        job.getConfiguration().setLong(PregelixJob.NUM_VERTICE, 20);
+        job.getConfiguration().writeXml(new FileOutputStream(new File(outputPath)));
+    }
+
+    private static void generateMessageOverflowJob(String jobName, String outputPath) throws IOException {
+        PregelixJob job = new PregelixJob(jobName);
+        job.setVertexClass(MessageOverflowVertex.class);
+        job.setVertexInputFormatClass(TextPageRankInputFormat.class);
+        job.setVertexOutputFormatClass(SimpleMessageOverflowVertexOutputFormat.class);
+        job.setNoramlizedKeyComputerClass(VLongNormalizedKeyComputer.class);
+        job.setDynamicVertexValueSize(true);
+        job.setFrameSize(2048);
+        FileInputFormat.setInputPaths(job, HDFS_INPUTPATH);
+        FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH));
+        job.getConfiguration().setLong(PregelixJob.NUM_VERTICE, 20);
+        job.getConfiguration().writeXml(new FileOutputStream(new File(outputPath)));
+    }
+
+    private static void generateMessageOverflowJobLSM(String jobName, String outputPath) throws IOException {
+        PregelixJob job = new PregelixJob(jobName);
+        job.setVertexClass(MessageOverflowVertex.class);
+        job.setVertexInputFormatClass(TextPageRankInputFormat.class);
+        job.setVertexOutputFormatClass(SimpleMessageOverflowVertexOutputFormat.class);
+        job.setNoramlizedKeyComputerClass(VLongNormalizedKeyComputer.class);
+        job.setDynamicVertexValueSize(true);
+        job.setFrameSize(2048);
+        job.setLSMStorage(true);
+        FileInputFormat.setInputPaths(job, HDFS_INPUTPATH);
+        FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH));
+        job.getConfiguration().setLong(PregelixJob.NUM_VERTICE, 20);
+        job.getConfiguration().writeXml(new FileOutputStream(new File(outputPath)));
+    }
+
+    private static void generateEarlyTerminationJob(String jobName, String outputPath) throws IOException {
+        PregelixJob job = new PregelixJob(jobName);
+        job.setVertexClass(EarlyTerminationVertex.class);
+        job.setVertexInputFormatClass(TextPageRankInputFormat.class);
+        job.setVertexOutputFormatClass(SimpleEarlyTerminattionVertexOutputFormat.class);
+        job.setNoramlizedKeyComputerClass(VLongNormalizedKeyComputer.class);
+        FileInputFormat.setInputPaths(job, HDFS_INPUTPATH);
+        FileOutputFormat.setOutputPath(job, new Path(HDFS_OUTPUTPAH));
+        job.getConfiguration().setLong(PregelixJob.NUM_VERTICE, 20);
+        job.getConfiguration().writeXml(new FileOutputStream(new File(outputPath)));
+    }
+
     private static void genPageRank() throws IOException {
         generatePageRankJob("PageRank", outputBase + "PageRank.xml");
         generatePageRankJobReal("PageRank", outputBase + "PageRankReal.xml");
@@ -312,6 +377,16 @@
         generateGraphMutationJob("Graph Mutation", outputBase + "GraphMutation.xml");
     }
 
+    private static void genMessageOverflow() throws IOException {
+        generateMessageOverflowJob("Message Overflow", outputBase + "MessageOverflow.xml");
+        generateMessageOverflowJobLSM("Message Overflow LSM", outputBase + "MessageOverflowLSM.xml");
+        generateMessageOverflowFixedsizeJob("Message Overflow Fixedsize", outputBase + "MessageOverflowFixedsize.xml");
+    }
+
+    private static void genEarlyTermination() throws IOException {
+        generateEarlyTerminationJob("Early Termination", outputBase + "EarlyTermination.xml");
+    }
+
     public static void main(String[] args) throws IOException {
         genPageRank();
         genShortestPath();
@@ -320,5 +395,7 @@
         genTriangleCounting();
         genMaximalClique();
         genGraphMutation();
+        genMessageOverflow();
+        genEarlyTermination();
     }
 }
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 7b0c7da..f077053 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
@@ -94,7 +94,7 @@
     @Test
     public void test() throws Exception {
         setUp();
-        Plan[] plans = new Plan[] { Plan.OUTER_JOIN_SORT, Plan.OUTER_JOIN, Plan.INNER_JOIN, Plan.OUTER_JOIN_SINGLE_SORT };
+        Plan[] plans = new Plan[] { Plan.INNER_JOIN, Plan.OUTER_JOIN, Plan.OUTER_JOIN_SINGLE_SORT, Plan.OUTER_JOIN_SORT };
         for (Plan plan : plans) {
             driver.runJob(job, plan, PregelixHyracksIntegrationUtil.CC_HOST,
                     PregelixHyracksIntegrationUtil.TEST_HYRACKS_CC_CLIENT_PORT, false);
diff --git a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/lib/io/SizeEstimationTest.java b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/lib/io/SizeEstimationTest.java
new file mode 100644
index 0000000..196b114
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/lib/io/SizeEstimationTest.java
@@ -0,0 +1,151 @@
+/*
+ * 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.pregelix.example.lib.io;
+
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutput;
+import java.io.DataOutputStream;
+import java.util.Random;
+
+import org.junit.Test;
+
+import edu.uci.ics.pregelix.api.graph.MsgList;
+import edu.uci.ics.pregelix.api.io.WritableSizable;
+import edu.uci.ics.pregelix.example.io.BooleanWritable;
+import edu.uci.ics.pregelix.example.io.ByteWritable;
+import edu.uci.ics.pregelix.example.io.DoubleWritable;
+import edu.uci.ics.pregelix.example.io.IntWritable;
+import edu.uci.ics.pregelix.example.io.LongWritable;
+import edu.uci.ics.pregelix.example.io.NullWritable;
+import edu.uci.ics.pregelix.example.io.VIntWritable;
+import edu.uci.ics.pregelix.example.io.VLongWritable;
+
+/**
+ * @author yingyib
+ */
+public class SizeEstimationTest {
+
+    @Test
+    public void testVLong() throws Exception {
+        Random rand = new Random(System.currentTimeMillis());
+        MsgList<WritableSizable> msgList = new MsgList<WritableSizable>();
+        for (int i = 0; i < 1000000; i++) {
+            msgList.add(new VLongWritable(Math.abs(rand.nextLong())));
+        }
+        verifySizeEstimation(msgList);
+    }
+
+    @Test
+    public void testLong() throws Exception {
+        Random rand = new Random(System.currentTimeMillis());
+        MsgList<WritableSizable> msgList = new MsgList<WritableSizable>();
+        for (int i = 0; i < 1000000; i++) {
+            msgList.add(new LongWritable(rand.nextLong()));
+        }
+        verifySizeEstimation(msgList);
+    }
+
+    @Test
+    public void testBoolean() throws Exception {
+        Random rand = new Random(System.currentTimeMillis());
+        MsgList<WritableSizable> msgList = new MsgList<WritableSizable>();
+        for (int i = 0; i < 1000000; i++) {
+            msgList.add(new BooleanWritable(rand.nextBoolean()));
+        }
+        verifySizeEstimation(msgList);
+    }
+
+    @Test
+    public void testByte() throws Exception {
+        Random rand = new Random(System.currentTimeMillis());
+        MsgList<WritableSizable> msgList = new MsgList<WritableSizable>();
+        for (int i = 0; i < 1000000; i++) {
+            msgList.add(new ByteWritable((byte) rand.nextInt()));
+        }
+        verifySizeEstimation(msgList);
+    }
+
+    @Test
+    public void testDouble() throws Exception {
+        Random rand = new Random(System.currentTimeMillis());
+        MsgList<WritableSizable> msgList = new MsgList<WritableSizable>();
+        for (int i = 0; i < 1000000; i++) {
+            msgList.add(new DoubleWritable(rand.nextDouble()));
+        }
+        verifySizeEstimation(msgList);
+    }
+
+    @Test
+    public void testFloat() throws Exception {
+        Random rand = new Random(System.currentTimeMillis());
+        MsgList<WritableSizable> msgList = new MsgList<WritableSizable>();
+        for (int i = 0; i < 1000000; i++) {
+            msgList.add(new DoubleWritable(rand.nextFloat()));
+        }
+        verifySizeEstimation(msgList);
+    }
+    
+    @Test
+    public void testNull() throws Exception {
+        MsgList<WritableSizable> msgList = new MsgList<WritableSizable>();
+        for (int i = 0; i < 1000000; i++) {
+            msgList.add(NullWritable.get());
+        }
+        verifySizeEstimation(msgList);
+    }
+    
+    @Test
+    public void testVInt() throws Exception {
+        Random rand = new Random(System.currentTimeMillis());
+        MsgList<WritableSizable> msgList = new MsgList<WritableSizable>();
+        for (int i = 0; i < 1000000; i++) {
+            msgList.add(new VIntWritable(rand.nextInt()));
+        }
+        verifySizeEstimation(msgList);
+    }
+    
+    @Test
+    public void testInt() throws Exception {
+        Random rand = new Random(System.currentTimeMillis());
+        MsgList<WritableSizable> msgList = new MsgList<WritableSizable>();
+        for (int i = 0; i < 1000000; i++) {
+            msgList.add(new IntWritable(rand.nextInt()));
+        }
+        verifySizeEstimation(msgList);
+    }
+
+    private void verifySizeEstimation(MsgList<WritableSizable> msgList) throws Exception {
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        DataOutput dos = new DataOutputStream(bos);
+        int accumulatedSize = 5;
+        for (int i = 0; i < msgList.size(); i++) {
+            bos.reset();
+            WritableSizable value = msgList.get(i);
+            value.write(dos);
+            if (value.sizeInBytes() < bos.size()) {
+                throw new Exception(value + " estimated size (" + value.sizeInBytes()
+                        + ") is smaller than the actual size" + bos.size());
+            }
+            accumulatedSize += value.sizeInBytes();
+        }
+        bos.reset();
+        msgList.write(dos);
+        if (accumulatedSize < bos.size()) {
+            throw new Exception("Estimated list size (" + accumulatedSize + ") is smaller than the actual size"
+                    + bos.size());
+        }
+    }
+
+}
diff --git a/pregelix/pregelix-example/src/test/resources/expected/EarlyTermination/part-0 b/pregelix/pregelix-example/src/test/resources/expected/EarlyTermination/part-0
new file mode 100644
index 0000000..60a55af
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/EarlyTermination/part-0
@@ -0,0 +1,5 @@
+0	2
+4	2
+8	2
+12	2
+16	2
diff --git a/pregelix/pregelix-example/src/test/resources/expected/EarlyTermination/part-1 b/pregelix/pregelix-example/src/test/resources/expected/EarlyTermination/part-1
new file mode 100644
index 0000000..32ee93f
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/EarlyTermination/part-1
@@ -0,0 +1,5 @@
+1	2
+5	2
+9	2
+13	2
+17	2
diff --git a/pregelix/pregelix-example/src/test/resources/expected/EarlyTermination/part-2 b/pregelix/pregelix-example/src/test/resources/expected/EarlyTermination/part-2
new file mode 100644
index 0000000..542ccae
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/EarlyTermination/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/EarlyTermination/part-3 b/pregelix/pregelix-example/src/test/resources/expected/EarlyTermination/part-3
new file mode 100644
index 0000000..ff0e5b8
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/EarlyTermination/part-3
@@ -0,0 +1,5 @@
+3	1
+7	1
+11	1
+15	1
+19	1
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MessageOverflow/part-0 b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflow/part-0
new file mode 100644
index 0000000..db5f679
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflow/part-0
@@ -0,0 +1,5 @@
+0	10000
+4	70000
+8	30000
+12	90000
+16	50000
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MessageOverflow/part-1 b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflow/part-1
new file mode 100644
index 0000000..3dc4629
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflow/part-1
@@ -0,0 +1,5 @@
+1	100000
+5	60000
+9	20000
+13	80000
+17	40000
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MessageOverflow/part-2 b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflow/part-2
new file mode 100644
index 0000000..bc95831
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflow/part-2
@@ -0,0 +1,5 @@
+2	90000
+6	50000
+10	10000
+14	70000
+18	30000
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MessageOverflow/part-3 b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflow/part-3
new file mode 100644
index 0000000..b619cd7
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflow/part-3
@@ -0,0 +1,5 @@
+3	80000
+7	40000
+11	100000
+15	60000
+19	20000
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowFixedsize/part-0 b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowFixedsize/part-0
new file mode 100644
index 0000000..db5f679
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowFixedsize/part-0
@@ -0,0 +1,5 @@
+0	10000
+4	70000
+8	30000
+12	90000
+16	50000
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowFixedsize/part-1 b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowFixedsize/part-1
new file mode 100644
index 0000000..3dc4629
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowFixedsize/part-1
@@ -0,0 +1,5 @@
+1	100000
+5	60000
+9	20000
+13	80000
+17	40000
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowFixedsize/part-2 b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowFixedsize/part-2
new file mode 100644
index 0000000..bc95831
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowFixedsize/part-2
@@ -0,0 +1,5 @@
+2	90000
+6	50000
+10	10000
+14	70000
+18	30000
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowFixedsize/part-3 b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowFixedsize/part-3
new file mode 100644
index 0000000..b619cd7
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowFixedsize/part-3
@@ -0,0 +1,5 @@
+3	80000
+7	40000
+11	100000
+15	60000
+19	20000
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowLSM/part-0 b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowLSM/part-0
new file mode 100644
index 0000000..db5f679
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowLSM/part-0
@@ -0,0 +1,5 @@
+0	10000
+4	70000
+8	30000
+12	90000
+16	50000
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowLSM/part-1 b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowLSM/part-1
new file mode 100644
index 0000000..3dc4629
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowLSM/part-1
@@ -0,0 +1,5 @@
+1	100000
+5	60000
+9	20000
+13	80000
+17	40000
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowLSM/part-2 b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowLSM/part-2
new file mode 100644
index 0000000..bc95831
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowLSM/part-2
@@ -0,0 +1,5 @@
+2	90000
+6	50000
+10	10000
+14	70000
+18	30000
diff --git a/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowLSM/part-3 b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowLSM/part-3
new file mode 100644
index 0000000..b619cd7
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/MessageOverflowLSM/part-3
@@ -0,0 +1,5 @@
+3	80000
+7	40000
+11	100000
+15	60000
+19	20000
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/ConnectedComponentsReal.xml b/pregelix/pregelix-example/src/test/resources/jobs/ConnectedComponentsReal.xml
index 199efab..decbde8 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/ConnectedComponentsReal.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/ConnectedComponentsReal.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/ConnectedComponentsRealComplex.xml b/pregelix/pregelix-example/src/test/resources/jobs/ConnectedComponentsRealComplex.xml
index 46444b3..cca66bb 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/ConnectedComponentsRealComplex.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/ConnectedComponentsRealComplex.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
@@ -137,6 +122,7 @@
 <property><name>pregelix.vertexOutputFormatClass</name><value>edu.uci.ics.pregelix.example.ConnectedComponentsVertex$SimpleConnectedComponentsVertexOutputFormat</value></property>
 <property><name>mapred.reduce.copy.backoff</name><value>300</value></property>
 <property><name>mapred.map.tasks.speculative.execution</name><value>true</value></property>
+<property><name>pregelix.partitionerClass</name><value>edu.uci.ics.pregelix.api.util.DefaultVertexPartitioner</value></property>
 <property><name>mapred.inmem.merge.threshold</name><value>1000</value></property>
 <property><name>hadoop.logfile.size</name><value>10000000</value></property>
 <property><name>pregelix.vertexInputFormatClass</name><value>edu.uci.ics.pregelix.example.inputformat.TextConnectedComponentsInputFormat</value></property>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/EarlyTermination.xml b/pregelix/pregelix-example/src/test/resources/jobs/EarlyTermination.xml
new file mode 100644
index 0000000..d908da8
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/jobs/EarlyTermination.xml
@@ -0,0 +1,142 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><configuration>
+<property><name>mapred.tasktracker.dns.nameserver</name><value>default</value></property>
+<property><name>mapred.queue.default.acl-administer-jobs</name><value>*</value></property>
+<property><name>mapred.skip.map.auto.incr.proc.count</name><value>true</value></property>
+<property><name>mapred.jobtracker.instrumentation</name><value>org.apache.hadoop.mapred.JobTrackerMetricsInst</value></property>
+<property><name>mapred.skip.reduce.auto.incr.proc.count</name><value>true</value></property>
+<property><name>fs.hsftp.impl</name><value>org.apache.hadoop.hdfs.HsftpFileSystem</value></property>
+<property><name>mapred.input.dir</name><value>file:/webmap</value></property>
+<property><name>mapred.submit.replication</name><value>10</value></property>
+<property><name>ipc.server.tcpnodelay</name><value>false</value></property>
+<property><name>fs.checkpoint.dir</name><value>${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>/result</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>Early Termination</value></property>
+<property><name>pregelix.nmkComputerClass</name><value>edu.uci.ics.pregelix.example.data.VLongNormalizedKeyComputer</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>pregelix.numVertices</name><value>20</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.EarlyTerminationVertex</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.EarlyTerminationVertex$SimpleEarlyTerminattionVertexOutputFormat</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.inputformat.TextPageRankInputFormat</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>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/GraphMutation.xml b/pregelix/pregelix-example/src/test/resources/jobs/GraphMutation.xml
index 47db410..d5ec8f1 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/GraphMutation.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/GraphMutation.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique.xml b/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique.xml
index c08853b..b4c42e6 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
@@ -95,6 +80,7 @@
 <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>pregelix.updateIntensive</name><value>true</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>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique2.xml b/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique2.xml
index aafabee..6cf075b 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique2.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique2.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
@@ -95,6 +80,7 @@
 <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>pregelix.updateIntensive</name><value>true</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>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique3.xml b/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique3.xml
index ee13335..49e2e6f 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique3.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/MaximalClique3.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
@@ -95,6 +80,7 @@
 <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>pregelix.updateIntensive</name><value>true</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>
@@ -135,6 +121,7 @@
 <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>pregelix.partitionerClass</name><value>edu.uci.ics.pregelix.api.util.DefaultVertexPartitioner</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>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflow.xml b/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflow.xml
new file mode 100644
index 0000000..8316c64
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflow.xml
@@ -0,0 +1,144 @@
+<?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:/webmap</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>/result</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>Message Overflow</value></property>
+<property><name>pregelix.nmkComputerClass</name><value>edu.uci.ics.pregelix.example.data.VLongNormalizedKeyComputer</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>pregelix.numVertices</name><value>20</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.MessageOverflowVertex</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>pregelix.framesize</name><value>2048</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>${hadoop.tmp.dir}/mapred/system</value></property>
+<property><name>mapred.line.input.format.linespermap</name><value>1</value></property>
+<property><name>job.end.retry.attempts</name><value>0</value></property>
+<property><name>ipc.client.idlethreshold</name><value>4000</value></property>
+<property><name>pregelix.vertexOutputFormatClass</name><value>edu.uci.ics.pregelix.example.MessageOverflowVertex$SimpleMessageOverflowVertexOutputFormat</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.inputformat.TextPageRankInputFormat</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/MessageOverflowFixedsize.xml b/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflowFixedsize.xml
new file mode 100644
index 0000000..a894ccd
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflowFixedsize.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:/webmap</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>/result</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>Message Overflow Fixedsize</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>pregelix.numVertices</name><value>20</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.MessageOverflowFixedsizeVertex</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>pregelix.framesize</name><value>2048</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>${hadoop.tmp.dir}/mapred/system</value></property>
+<property><name>mapred.line.input.format.linespermap</name><value>1</value></property>
+<property><name>job.end.retry.attempts</name><value>0</value></property>
+<property><name>ipc.client.idlethreshold</name><value>4000</value></property>
+<property><name>pregelix.vertexOutputFormatClass</name><value>edu.uci.ics.pregelix.example.MessageOverflowFixedsizeVertex$SimpleMessageOverflowVertexOutputFormat</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.inputformat.TextPageRankInputFormat</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>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/MessageOverflowLSM.xml b/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflowLSM.xml
new file mode 100644
index 0000000..a9f8925
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflowLSM.xml
@@ -0,0 +1,145 @@
+<?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:/webmap</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>/result</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>Message Overflow LSM</value></property>
+<property><name>pregelix.nmkComputerClass</name><value>edu.uci.ics.pregelix.example.data.VLongNormalizedKeyComputer</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>pregelix.numVertices</name><value>20</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.MessageOverflowVertex</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>pregelix.updateIntensive</name><value>true</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>pregelix.framesize</name><value>2048</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>${hadoop.tmp.dir}/mapred/system</value></property>
+<property><name>mapred.line.input.format.linespermap</name><value>1</value></property>
+<property><name>job.end.retry.attempts</name><value>0</value></property>
+<property><name>ipc.client.idlethreshold</name><value>4000</value></property>
+<property><name>pregelix.vertexOutputFormatClass</name><value>edu.uci.ics.pregelix.example.MessageOverflowVertex$SimpleMessageOverflowVertexOutputFormat</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.inputformat.TextPageRankInputFormat</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/PageRank.xml b/pregelix/pregelix-example/src/test/resources/jobs/PageRank.xml
index 5f03027..65e0b30 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/PageRank.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/PageRank.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/PageRankReal.xml b/pregelix/pregelix-example/src/test/resources/jobs/PageRankReal.xml
index 9ab92ff..9e1e0b0 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/PageRankReal.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/PageRankReal.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/PageRankRealComplex.xml b/pregelix/pregelix-example/src/test/resources/jobs/PageRankRealComplex.xml
index 314ca55..c4366d7 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/PageRankRealComplex.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/PageRankRealComplex.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
@@ -137,6 +122,7 @@
 <property><name>pregelix.vertexOutputFormatClass</name><value>edu.uci.ics.pregelix.example.PageRankVertex$SimplePageRankVertexOutputFormat</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>pregelix.partitionerClass</name><value>edu.uci.ics.pregelix.api.util.DefaultVertexPartitioner</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.inputformat.TextPageRankInputFormat</value></property>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/PageRankRealDynamic.xml b/pregelix/pregelix-example/src/test/resources/jobs/PageRankRealDynamic.xml
index f8a2055..c05a4da 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/PageRankRealDynamic.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/PageRankRealDynamic.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/PageRankRealNoCombiner.xml b/pregelix/pregelix-example/src/test/resources/jobs/PageRankRealNoCombiner.xml
index f1c72fa..ac0d508 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/PageRankRealNoCombiner.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/PageRankRealNoCombiner.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/ReachibilityRealComplex.xml b/pregelix/pregelix-example/src/test/resources/jobs/ReachibilityRealComplex.xml
index 427c0ea..225429a 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/ReachibilityRealComplex.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/ReachibilityRealComplex.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/ReachibilityRealComplexNoConnectivity.xml b/pregelix/pregelix-example/src/test/resources/jobs/ReachibilityRealComplexNoConnectivity.xml
index 7e96163..bd9da92 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/ReachibilityRealComplexNoConnectivity.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/ReachibilityRealComplexNoConnectivity.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/ShortestPaths.xml b/pregelix/pregelix-example/src/test/resources/jobs/ShortestPaths.xml
index 823e8b0..9acd7bc 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/ShortestPaths.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/ShortestPaths.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/ShortestPathsReal.xml b/pregelix/pregelix-example/src/test/resources/jobs/ShortestPathsReal.xml
index 4ae102b..6c25575 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/ShortestPathsReal.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/ShortestPathsReal.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/TriangleCounting.xml b/pregelix/pregelix-example/src/test/resources/jobs/TriangleCounting.xml
index 228a526..4a40a6a 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/TriangleCounting.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/TriangleCounting.xml
@@ -1,19 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!--
- ! 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.
- !-->
-<configuration>
+<?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>
diff --git a/pregelix/pregelix-runtime/pom.xml b/pregelix/pregelix-runtime/pom.xml
index ae9f47e..6564eb0 100644
--- a/pregelix/pregelix-runtime/pom.xml
+++ b/pregelix/pregelix-runtime/pom.xml
@@ -21,7 +21,7 @@
 	<parent>
     		<groupId>edu.uci.ics.hyracks</groupId>
     		<artifactId>pregelix</artifactId>
-    		<version>0.2.7-SNAPSHOT</version>
+    		<version>0.2.10-SNAPSHOT</version>
   	</parent>
 
 
@@ -88,82 +88,89 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-api</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow-std</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-common</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-btree</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-storage-am-lsm-common</artifactId>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-ipc</artifactId>
-			<version>0.2.7-SNAPSHOT</version>
+			<version>0.2.10-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/VirtualBufferCacheProvider.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/VirtualBufferCacheProvider.java
new file mode 100644
index 0000000..ec51047
--- /dev/null
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/VirtualBufferCacheProvider.java
@@ -0,0 +1,39 @@
+/*
+ * 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.pregelix.runtime.bootstrap;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IVirtualBufferCache;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.IVirtualBufferCacheProvider;
+import edu.uci.ics.pregelix.dataflow.context.RuntimeContext;
+
+/**
+ * The virtual buffer cache provider
+ * 
+ * @author yingyib
+ */
+public class VirtualBufferCacheProvider implements IVirtualBufferCacheProvider {
+
+    private static final long serialVersionUID = 1L;
+
+    public VirtualBufferCacheProvider(){
+        
+    }
+    
+    @Override
+    public synchronized IVirtualBufferCache getVirtualBufferCache(IHyracksTaskContext ctx) {
+        return RuntimeContext.get(ctx).getVirtualBufferCache();
+    }
+}
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 16ecf6c..d46457c 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
@@ -32,8 +32,8 @@
 import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.pregelix.api.graph.GlobalAggregator;
+import edu.uci.ics.pregelix.api.graph.MsgList;
 import edu.uci.ics.pregelix.api.graph.Vertex;
-import edu.uci.ics.pregelix.api.util.ArrayListWritable;
 import edu.uci.ics.pregelix.api.util.ArrayListWritable.ArrayIterator;
 import edu.uci.ics.pregelix.api.util.BspUtils;
 import edu.uci.ics.pregelix.api.util.FrameTupleUtils;
@@ -168,11 +168,16 @@
                 tbAlive.reset();
 
                 vertex = (Vertex) tuple[3];
+
+                if (vertex.isPartitionTerminated()) {
+                    vertex.voteToHalt();
+                    return;
+                }
                 vertex.setOutputWriters(writers);
                 vertex.setOutputAppenders(appenders);
                 vertex.setOutputTupleBuilders(tbs);
 
-                ArrayListWritable msgContentList = (ArrayListWritable) tuple[1];
+                MsgList msgContentList = (MsgList) tuple[1];
                 msgContentList.reset(msgIterator);
 
                 if (!msgIterator.hasNext() && vertex.isHalted()) {
@@ -183,9 +188,15 @@
                 }
 
                 try {
+                    if (msgContentList.segmentStart()) {
+                        vertex.open();
+                    }
                     vertex.compute(msgIterator);
+                    if (msgContentList.segmentEnd()) {
+                        vertex.close();
+                    }
                     vertex.finishCompute();
-                } catch (IOException e) {
+                } catch (Exception e) {
                     throw new HyracksDataException(e);
                 }
 
@@ -194,7 +205,6 @@
                  */
                 if (terminate && (!vertex.isHalted() || vertex.hasMessage() || vertex.createdNewLiveVertex()))
                     terminate = false;
-
                 aggregator.step(vertex);
             }
 
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/function/NoOpUpdateFunctionFactory.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/function/NoOpUpdateFunctionFactory.java
new file mode 100644
index 0000000..88577c2
--- /dev/null
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/function/NoOpUpdateFunctionFactory.java
@@ -0,0 +1,67 @@
+/*
+ * 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.pregelix.runtime.function;
+
+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.common.comm.io.ArrayTupleBuilder;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.pregelix.dataflow.std.base.IUpdateFunction;
+import edu.uci.ics.pregelix.dataflow.std.base.IUpdateFunctionFactory;
+
+/**
+ * No operation update function factory
+ * 
+ * @author yingyib
+ */
+public class NoOpUpdateFunctionFactory implements IUpdateFunctionFactory {
+    private static final long serialVersionUID = 1L;
+    public static NoOpUpdateFunctionFactory INSTANCE = new NoOpUpdateFunctionFactory();
+
+    private NoOpUpdateFunctionFactory() {
+
+    }
+
+    @Override
+    public IUpdateFunction createFunction() {
+        return new IUpdateFunction() {
+
+            @Override
+            public void open(IHyracksTaskContext ctx, RecordDescriptor rd, IFrameWriter... writer)
+                    throws HyracksDataException {
+
+            }
+
+            @Override
+            public void process(Object[] tuple) throws HyracksDataException {
+
+            }
+
+            @Override
+            public void close() throws HyracksDataException {
+
+            }
+
+            @Override
+            public void update(ITupleReference tupleRef, ArrayTupleBuilder cloneUpdateTb) throws HyracksDataException {
+
+            }
+
+        };
+    }
+
+}
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 fa7e0a1..eba75c9 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
@@ -172,6 +172,10 @@
                 tbAlive.reset();
 
                 vertex = (Vertex) tuple[1];
+                if (vertex.isPartitionTerminated()) {
+                    vertex.voteToHalt();
+                    return;
+                }
                 vertex.setOutputWriters(writers);
                 vertex.setOutputAppenders(appenders);
                 vertex.setOutputTupleBuilders(tbs);
@@ -184,12 +188,13 @@
                 }
 
                 try {
+                    vertex.open();
                     vertex.compute(msgIterator);
+                    vertex.close();
                     vertex.finishCompute();
-                } catch (IOException e) {
+                } catch (Exception e) {
                     throw new HyracksDataException(e);
                 }
-
                 /**
                  * this partition should not terminate
                  */
@@ -200,6 +205,7 @@
                  * call the global aggregator
                  */
                 aggregator.step(vertex);
+
             }
 
             @Override
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 77f28e4..3d52a45 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
@@ -14,22 +14,27 @@
  */
 package edu.uci.ics.pregelix.runtime.simpleagg;
 
+import java.nio.ByteBuffer;
+
 import org.apache.commons.lang3.tuple.Pair;
 
 import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+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.data.std.util.ArrayBackedValueStorage;
 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.dataflow.common.data.accessors.FrameTupleReference;
 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;
+import edu.uci.ics.pregelix.dataflow.group.IClusteredAggregatorDescriptorFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IAggregateFunction;
 import edu.uci.ics.pregelix.dataflow.std.base.IAggregateFunctionFactory;
 
-public class AccumulatingAggregatorFactory implements IAggregatorDescriptorFactory {
+public class AccumulatingAggregatorFactory implements IClusteredAggregatorDescriptorFactory {
 
     private static final long serialVersionUID = 1L;
     private IAggregateFunctionFactory[] aggFactories;
@@ -41,52 +46,56 @@
     @SuppressWarnings("unchecked")
     @Override
     public IAggregatorDescriptor createAggregator(final IHyracksTaskContext ctx, RecordDescriptor inRecordDesc,
-            RecordDescriptor outRecordDescriptor, int[] aggKeys, int[] partialKeys) throws HyracksDataException {
+            RecordDescriptor outRecordDescriptor, final int[] groupFields, int[] partialgroupFields,
+            final IFrameWriter writer, final ByteBuffer outputFrame, final FrameTupleAppender appender)
+            throws HyracksDataException {
+        final int frameSize = ctx.getFrameSize();
+        final ArrayTupleBuilder internalTupleBuilder = new ArrayTupleBuilder(outRecordDescriptor.getFields().length);
 
         return new IAggregatorDescriptor() {
-
             private FrameTupleReference ftr = new FrameTupleReference();
+            private int groupKeySize = 0;
+            private int metaSlotSize = 4;
+
+            @Override
+            public AggregateState createAggregateStates() {
+                IAggregateFunction[] agg = new IAggregateFunction[aggFactories.length];
+                ArrayBackedValueStorage[] aggOutput = new ArrayBackedValueStorage[aggFactories.length];
+                for (int i = 0; i < agg.length; i++) {
+                    aggOutput[i] = new ArrayBackedValueStorage();
+                    try {
+                        agg[i] = aggFactories[i].createAggregateFunction(ctx, aggOutput[i], writer);
+                    } catch (Exception e) {
+                        throw new IllegalStateException(e);
+                    }
+                }
+                return new AggregateState(Pair.of(aggOutput, agg));
+            }
 
             @Override
             public void init(ArrayTupleBuilder tupleBuilder, IFrameTupleAccessor accessor, int tIndex,
                     AggregateState state) throws HyracksDataException {
-                Pair<ArrayBackedValueStorage[], IAggregateFunction[]> aggState = (Pair<ArrayBackedValueStorage[], IAggregateFunction[]>) state.state;
-                ArrayBackedValueStorage[] aggOutput = aggState.getLeft();
-                IAggregateFunction[] agg = aggState.getRight();
-
-                // initialize aggregate functions
-                for (int i = 0; i < agg.length; i++) {
-                    aggOutput[i].reset();
-                    try {
-                        agg[i].init();
-                    } catch (Exception e) {
-                        throw new HyracksDataException(e);
-                    }
+                setGroupKeySize(accessor, tIndex);
+                initAggregateFunctions(state, true);
+                int stateSize = estimateStep(accessor, tIndex, state);
+                if (stateSize > frameSize) {
+                    throw new HyracksDataException(
+                            "Message combiner intermediate data size "
+                                    + stateSize
+                                    + " is larger than frame size! Check the size estimattion implementation in the message combiner.");
                 }
-
-                ftr.reset(accessor, tIndex);
-                for (int i = 0; i < agg.length; i++) {
-                    try {
-                        agg[i].step(ftr);
-                    } catch (Exception e) {
-                        throw new HyracksDataException(e);
-                    }
-                }
+                singleStep(accessor, tIndex, state);
             }
 
             @Override
             public void aggregate(IFrameTupleAccessor accessor, int tIndex, IFrameTupleAccessor stateAccessor,
                     int stateTupleIndex, AggregateState state) throws HyracksDataException {
-                Pair<ArrayBackedValueStorage[], IAggregateFunction[]> aggState = (Pair<ArrayBackedValueStorage[], IAggregateFunction[]>) state.state;
-                IAggregateFunction[] agg = aggState.getRight();
-                ftr.reset(accessor, tIndex);
-                for (int i = 0; i < agg.length; i++) {
-                    try {
-                        agg[i].step(ftr);
-                    } catch (Exception e) {
-                        throw new HyracksDataException(e);
-                    }
+                int stateSize = estimateStep(accessor, tIndex, state);
+                if (stateSize > frameSize) {
+                    emitResultTuple(accessor, tIndex, state);
+                    initAggregateFunctions(state, false);
                 }
+                singleStep(accessor, tIndex, state);
             }
 
             @Override
@@ -97,7 +106,7 @@
                 IAggregateFunction[] agg = aggState.getRight();
                 for (int i = 0; i < agg.length; i++) {
                     try {
-                        agg[i].finish();
+                        agg[i].finishAll();
                         tupleBuilder.addField(aggOutput[i].getByteArray(), aggOutput[i].getStartOffset(),
                                 aggOutput[i].getLength());
                     } catch (Exception e) {
@@ -107,21 +116,6 @@
             }
 
             @Override
-            public AggregateState createAggregateStates() {
-                IAggregateFunction[] agg = new IAggregateFunction[aggFactories.length];
-                ArrayBackedValueStorage[] aggOutput = new ArrayBackedValueStorage[aggFactories.length];
-                for (int i = 0; i < agg.length; i++) {
-                    aggOutput[i] = new ArrayBackedValueStorage();
-                    try {
-                        agg[i] = aggFactories[i].createAggregateFunction(ctx, aggOutput[i]);
-                    } catch (Exception e) {
-                        throw new IllegalStateException(e);
-                    }
-                }
-                return new AggregateState(Pair.of(aggOutput, agg));
-            }
-
-            @Override
             public void reset() {
 
             }
@@ -137,6 +131,97 @@
 
             }
 
+            private void initAggregateFunctions(AggregateState state, boolean all) throws HyracksDataException {
+                Pair<ArrayBackedValueStorage[], IAggregateFunction[]> aggState = (Pair<ArrayBackedValueStorage[], IAggregateFunction[]>) state.state;
+                ArrayBackedValueStorage[] aggOutput = aggState.getLeft();
+                IAggregateFunction[] agg = aggState.getRight();
+
+                /**
+                 * initialize aggregate functions
+                 */
+                for (int i = 0; i < agg.length; i++) {
+                    aggOutput[i].reset();
+                    try {
+                        if (all) {
+                            agg[i].initAll();
+                        } else {
+                            agg[i].init();
+                        }
+                    } catch (Exception e) {
+                        throw new HyracksDataException(e);
+                    }
+                }
+            }
+
+            private void singleStep(IFrameTupleAccessor accessor, int tIndex, AggregateState state)
+                    throws HyracksDataException {
+                Pair<ArrayBackedValueStorage[], IAggregateFunction[]> aggState = (Pair<ArrayBackedValueStorage[], IAggregateFunction[]>) state.state;
+                IAggregateFunction[] agg = aggState.getRight();
+                ftr.reset(accessor, tIndex);
+                for (int i = 0; i < agg.length; i++) {
+                    try {
+                        agg[i].step(ftr);
+                    } catch (Exception e) {
+                        throw new HyracksDataException(e);
+                    }
+                }
+            }
+
+            private int estimateStep(IFrameTupleAccessor accessor, int tIndex, AggregateState state)
+                    throws HyracksDataException {
+                int size = metaSlotSize + groupKeySize;
+                Pair<ArrayBackedValueStorage[], IAggregateFunction[]> aggState = (Pair<ArrayBackedValueStorage[], IAggregateFunction[]>) state.state;
+                IAggregateFunction[] agg = aggState.getRight();
+                ftr.reset(accessor, tIndex);
+                for (int i = 0; i < agg.length; i++) {
+                    try {
+                        size += agg[i].estimateStep(ftr) + metaSlotSize;
+                    } catch (Exception e) {
+                        throw new HyracksDataException(e);
+                    }
+                }
+                return size;
+            }
+
+            private void emitResultTuple(IFrameTupleAccessor accessor, int tIndex, AggregateState state)
+                    throws HyracksDataException {
+                internalTupleBuilder.reset();
+                for (int j = 0; j < groupFields.length; j++) {
+                    internalTupleBuilder.addField(accessor, tIndex, groupFields[j]);
+                }
+                Pair<ArrayBackedValueStorage[], IAggregateFunction[]> aggState = (Pair<ArrayBackedValueStorage[], IAggregateFunction[]>) state.state;
+                ArrayBackedValueStorage[] aggOutput = aggState.getLeft();
+                IAggregateFunction[] agg = aggState.getRight();
+                for (int i = 0; i < agg.length; i++) {
+                    try {
+                        agg[i].finish();
+                        internalTupleBuilder.addField(aggOutput[i].getByteArray(), aggOutput[i].getStartOffset(),
+                                aggOutput[i].getLength());
+                    } catch (Exception e) {
+                        throw new HyracksDataException(e);
+                    }
+                }
+                if (!appender.appendSkipEmptyField(internalTupleBuilder.getFieldEndOffsets(),
+                        internalTupleBuilder.getByteArray(), 0, internalTupleBuilder.getSize())) {
+                    FrameUtils.flushFrame(outputFrame, writer);
+                    appender.reset(outputFrame, true);
+                    if (!appender.appendSkipEmptyField(internalTupleBuilder.getFieldEndOffsets(),
+                            internalTupleBuilder.getByteArray(), 0, internalTupleBuilder.getSize())) {
+                        throw new HyracksDataException("The output cannot be fit into a frame.");
+                    }
+                }
+            }
+
+            public void setGroupKeySize(IFrameTupleAccessor accessor, int tIndex) {
+                groupKeySize = 0;
+                for (int i = 0; i < groupFields.length; i++) {
+                    int fIndex = groupFields[i];
+                    int fStartOffset = accessor.getFieldStartOffset(tIndex, fIndex);
+                    int fLen = accessor.getFieldEndOffset(tIndex, fIndex) - fStartOffset;
+                    groupKeySize += fLen + metaSlotSize;
+                }
+            }
+
         };
     }
 }
\ No newline at end of file
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 8090dff..5bc30a2 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.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.util.ByteBufferInputStream;
@@ -33,6 +34,7 @@
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
 import edu.uci.ics.pregelix.api.graph.MessageCombiner;
 import edu.uci.ics.pregelix.api.graph.MsgList;
+import edu.uci.ics.pregelix.api.io.WritableSizable;
 import edu.uci.ics.pregelix.api.util.BspUtils;
 import edu.uci.ics.pregelix.dataflow.base.IConfigurationFactory;
 import edu.uci.ics.pregelix.dataflow.std.base.IAggregateFunction;
@@ -54,10 +56,11 @@
     private MsgList msgList = new MsgList();
     private boolean keyRead = false;
 
-    public AggregationFunction(IHyracksTaskContext ctx, IConfigurationFactory confFactory, DataOutput output,
-            boolean isFinalStage, boolean partialAggAsInput) throws HyracksDataException {
+    public AggregationFunction(IHyracksTaskContext ctx, IConfigurationFactory confFactory, DataOutput tmpOutput,
+            IFrameWriter groupByOutputWriter, boolean isFinalStage, boolean partialAggAsInput)
+            throws HyracksDataException {
         this.conf = confFactory.createConfiguration(ctx);
-        this.output = output;
+        this.output = tmpOutput;
         this.isFinalStage = isFinalStage;
         this.partialAggAsInput = partialAggAsInput;
         msgList.setConf(this.conf);
@@ -68,6 +71,12 @@
     }
 
     @Override
+    public void initAll() throws HyracksDataException {
+        keyRead = false;
+        combiner.initAll(msgList);
+    }
+
+    @Override
     public void init() throws HyracksDataException {
         keyRead = false;
         combiner.init(msgList);
@@ -75,6 +84,43 @@
 
     @Override
     public void step(IFrameTupleReference tuple) throws HyracksDataException {
+        if (!partialAggAsInput) {
+            combiner.stepPartial(key, (WritableSizable) value);
+        } else {
+            combiner.stepFinal(key, value);
+        }
+    }
+
+    @Override
+    public void finish() throws HyracksDataException {
+        try {
+            if (!isFinalStage) {
+                combinedResult = combiner.finishPartial();
+            } else {
+                combinedResult = combiner.finishFinal();
+            }
+            combinedResult.write(output);
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public void finishAll() throws HyracksDataException {
+        try {
+            if (!isFinalStage) {
+                combinedResult = combiner.finishPartial();
+            } else {
+                combinedResult = combiner.finishFinalAll();
+            }
+            combinedResult.write(output);
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public int estimateStep(IFrameTupleReference tuple) throws HyracksDataException {
         FrameTupleReference ftr = (FrameTupleReference) tuple;
         IFrameTupleAccessor fta = ftr.getFrameTupleAccessor();
         ByteBuffer buffer = fta.getBuffer();
@@ -94,28 +140,13 @@
             }
             value.readFields(valueInput);
             if (!partialAggAsInput) {
-                combiner.stepPartial(key, value);
+                return combiner.estimateAccumulatedStateByteSizePartial(key, (WritableSizable) value);
             } else {
-                combiner.stepFinal(key, value);
+                return combiner.estimateAccumulatedStateByteSizeFinal(key, value);
             }
         } catch (IOException e) {
             throw new HyracksDataException(e);
         }
-
-    }
-
-    @Override
-    public void finish() throws HyracksDataException {
-        try {
-            if (!isFinalStage) {
-                combinedResult = combiner.finishPartial();
-            } else {
-                combinedResult = combiner.finishFinal();
-            }
-            combinedResult.write(output);
-        } catch (IOException e) {
-            throw new HyracksDataException(e);
-        }
     }
 
 }
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 33dfa5d..54eccf5 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.comm.IFrameWriter;
 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;
@@ -37,9 +38,9 @@
     }
 
     @Override
-    public IAggregateFunction createAggregateFunction(IHyracksTaskContext ctx, IDataOutputProvider provider)
-            throws HyracksException {
+    public IAggregateFunction createAggregateFunction(IHyracksTaskContext ctx, IDataOutputProvider provider,
+            IFrameWriter writer) throws HyracksException {
         DataOutput output = provider.getDataOutput();
-        return new AggregationFunction(ctx, confFactory, output, isFinalStage, partialAggAsInput);
+        return new AggregationFunction(ctx, confFactory, output, writer, isFinalStage, partialAggAsInput);
     }
 }
diff --git a/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/VertexPartitionComputerFactory.java b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/VertexPartitionComputerFactory.java
new file mode 100644
index 0000000..acccabb
--- /dev/null
+++ b/pregelix/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/touchpoint/VertexPartitionComputerFactory.java
@@ -0,0 +1,73 @@
+/*
+ * 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.pregelix.runtime.touchpoint;
+
+import java.io.DataInputStream;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.io.WritableComparable;
+
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.api.dataflow.value.ITuplePartitionComputer;
+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.api.graph.VertexPartitioner;
+import edu.uci.ics.pregelix.api.util.BspUtils;
+import edu.uci.ics.pregelix.dataflow.base.IConfigurationFactory;
+
+/**
+ * The vertex-based partition computer factory.
+ * It is used to support customized graph partitioning function.
+ * 
+ * @author yingyib
+ */
+public class VertexPartitionComputerFactory implements ITuplePartitionComputerFactory {
+
+    private static final long serialVersionUID = 1L;
+    private final IConfigurationFactory confFactory;
+
+    public VertexPartitionComputerFactory(IConfigurationFactory confFactory) {
+        this.confFactory = confFactory;
+    }
+
+    @SuppressWarnings("rawtypes")
+    public ITuplePartitionComputer createPartitioner() {
+        try {
+            final Configuration conf = confFactory.createConfiguration();
+            return new ITuplePartitionComputer() {
+                private final ByteBufferInputStream bbis = new ByteBufferInputStream();
+                private final DataInputStream dis = new DataInputStream(bbis);
+                private final VertexPartitioner partitioner = BspUtils.createVertexPartitioner(conf);
+                private final WritableComparable vertexId = BspUtils.createVertexIndex(conf);
+
+                @SuppressWarnings("unchecked")
+                public int partition(IFrameTupleAccessor accessor, int tIndex, int nParts) throws HyracksDataException {
+                    try {
+                        int keyStart = accessor.getTupleStartOffset(tIndex) + accessor.getFieldSlotsLength()
+                                + accessor.getFieldStartOffset(tIndex, 0);
+                        bbis.setByteBuffer(accessor.getBuffer(), keyStart);
+                        vertexId.readFields(dis);
+                        return Math.abs(partitioner.getPartitionId(vertexId, nParts) % nParts);
+                    } catch (Exception e) {
+                        throw new HyracksDataException(e);
+                    }
+                }
+            };
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+}