diff --git a/algebricks/algebricks-common/pom.xml b/algebricks/algebricks-common/pom.xml
index 521ef12..13f879b 100644
--- a/algebricks/algebricks-common/pom.xml
+++ b/algebricks/algebricks-common/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,7 +27,7 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-api</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-compiler/pom.xml b/algebricks/algebricks-compiler/pom.xml
index bd35835..9527512 100644
--- a/algebricks/algebricks-compiler/pom.xml
+++ b/algebricks/algebricks-compiler/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,12 +27,12 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-rewriter</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-core</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-core/pom.xml b/algebricks/algebricks-core/pom.xml
index def5b35..27ce778 100644
--- a/algebricks/algebricks-core/pom.xml
+++ b/algebricks/algebricks-core/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,27 +27,27 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-storage-am-btree</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-storage-am-rtree</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-dataflow-std</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-runtime</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-common</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/base/LogicalOperatorTag.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/base/LogicalOperatorTag.java
index 5234d2c..b8bdf3e 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/base/LogicalOperatorTag.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/base/LogicalOperatorTag.java
@@ -20,6 +20,7 @@
     CLUSTER,
     DATASOURCESCAN,
     DISTINCT,
+    DISTRIBUTE_RESULT,
     GROUP,
     EMPTYTUPLESOURCE,
     EXCHANGE,
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 a969372..32cfb9a 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
@@ -7,6 +7,7 @@
     BTREE_SEARCH,
     STATS,
     DATASOURCE_SCAN,
+    DISTRIBUTE_RESULT,
     EMPTY_TUPLE_SOURCE,
     EXTERNAL_GROUP_BY,
     IN_MEMORY_HASH_JOIN,
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/metadata/IMetadataProvider.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/metadata/IMetadataProvider.java
index 899b633..82187e3 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/metadata/IMetadataProvider.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/metadata/IMetadataProvider.java
@@ -51,6 +51,10 @@
             int[] printColumns, IPrinterFactory[] printerFactories, RecordDescriptor inputDesc)
             throws AlgebricksException;
 
+    public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getResultHandleRuntime(IDataSink sink,
+            int[] printColumns, IPrinterFactory[] printerFactories, RecordDescriptor inputDesc, boolean ordered,
+            JobSpecification spec) throws AlgebricksException;
+
     public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getWriteResultRuntime(IDataSource<S> dataSource,
             IOperatorSchema propagatedSchema, List<LogicalVariable> keys, LogicalVariable payLoadVar,
             JobGenContext context, JobSpecification jobSpec) throws AlgebricksException;
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/DistributeResultOperator.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/DistributeResultOperator.java
new file mode 100644
index 0000000..6ca6d87
--- /dev/null
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/DistributeResultOperator.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.lang3.mutable.Mutable;
+
+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.LogicalOperatorTag;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
+import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IDataSink;
+import edu.uci.ics.hyracks.algebricks.core.algebra.properties.VariablePropagationPolicy;
+import edu.uci.ics.hyracks.algebricks.core.algebra.typing.ITypingContext;
+import edu.uci.ics.hyracks.algebricks.core.algebra.visitors.ILogicalExpressionReferenceTransform;
+import edu.uci.ics.hyracks.algebricks.core.algebra.visitors.ILogicalOperatorVisitor;
+
+public class DistributeResultOperator extends AbstractLogicalOperator {
+    private List<Mutable<ILogicalExpression>> expressions;
+    private IDataSink dataSink;
+
+    public DistributeResultOperator(List<Mutable<ILogicalExpression>> expressions, IDataSink dataSink) {
+        this.expressions = expressions;
+        this.dataSink = dataSink;
+    }
+
+    public List<Mutable<ILogicalExpression>> getExpressions() {
+        return expressions;
+    }
+
+    public IDataSink getDataSink() {
+        return dataSink;
+    }
+
+    @Override
+    public LogicalOperatorTag getOperatorTag() {
+        return LogicalOperatorTag.DISTRIBUTE_RESULT;
+    }
+
+    @Override
+    public <R, T> R accept(ILogicalOperatorVisitor<R, T> visitor, T arg) throws AlgebricksException {
+        return visitor.visitDistributeResultOperator(this, arg);
+    }
+
+    @Override
+    public boolean acceptExpressionTransform(ILogicalExpressionReferenceTransform visitor) throws AlgebricksException {
+        boolean modif = false;
+        for (int i = 0; i < expressions.size(); i++) {
+            boolean b = visitor.transform(expressions.get(i));
+            if (b) {
+                modif = true;
+            }
+        }
+        return modif;
+    }
+
+    @Override
+    public VariablePropagationPolicy getVariablePropagationPolicy() {
+        return VariablePropagationPolicy.ALL;
+    }
+
+    @Override
+    public boolean isMap() {
+        return false; // actually depends on the physical op.
+    }
+
+    @Override
+    public void recomputeSchema() {
+        schema = new ArrayList<LogicalVariable>();
+        schema.addAll(inputs.get(0).getValue().getSchema());
+    }
+
+    @Override
+    public IVariableTypeEnvironment computeOutputTypeEnvironment(ITypingContext ctx) throws AlgebricksException {
+        return createPropagatingAllInputsTypeEnvironment(ctx);
+    }
+
+}
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/FDsAndEquivClassesVisitor.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/FDsAndEquivClassesVisitor.java
index 0539cbe..1b4be1e 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/FDsAndEquivClassesVisitor.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/FDsAndEquivClassesVisitor.java
@@ -47,8 +47,10 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DataSourceScanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DieOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistinctOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistributeResultOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.EmptyTupleSourceOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExchangeOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.GroupByOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.IndexInsertDeleteOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.InnerJoinOperator;
@@ -64,7 +66,6 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ScriptOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SelectOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SinkOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SubplanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnionAllOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestMapOperator;
@@ -476,6 +477,14 @@
     }
 
     @Override
+    public Void visitDistributeResultOperator(DistributeResultOperator op, IOptimizationContext ctx)
+            throws AlgebricksException {
+        // propagateFDsAndEquivClasses(op, ctx);
+        setEmptyFDsEqClasses(op, ctx);
+        return null;
+    }
+
+    @Override
     public Void visitWriteResultOperator(WriteResultOperator op, IOptimizationContext ctx) throws AlgebricksException {
         // propagateFDsAndEquivClasses(op, ctx);
         setEmptyFDsEqClasses(op, ctx);
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/IsomorphismOperatorVisitor.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/IsomorphismOperatorVisitor.java
index b97597d..ac6d887 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/IsomorphismOperatorVisitor.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/IsomorphismOperatorVisitor.java
@@ -38,6 +38,7 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DataSourceScanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DieOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistinctOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistributeResultOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.EmptyTupleSourceOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExchangeOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
@@ -425,6 +426,17 @@
     }
 
     @Override
+    public Boolean visitDistributeResultOperator(DistributeResultOperator op, ILogicalOperator arg)
+            throws AlgebricksException {
+        AbstractLogicalOperator aop = (AbstractLogicalOperator) arg;
+        if (aop.getOperatorTag() != LogicalOperatorTag.DISTRIBUTE_RESULT)
+            return Boolean.FALSE;
+        DistributeResultOperator writeOpArg = (DistributeResultOperator) copyAndSubstituteVar(op, arg);
+        boolean isomorphic = VariableUtilities.varListEqualUnordered(op.getSchema(), writeOpArg.getSchema());
+        return isomorphic;
+    }
+
+    @Override
     public Boolean visitWriteResultOperator(WriteResultOperator op, ILogicalOperator arg) throws AlgebricksException {
         AbstractLogicalOperator aop = (AbstractLogicalOperator) arg;
         if (aop.getOperatorTag() != LogicalOperatorTag.WRITE_RESULT)
@@ -762,6 +774,14 @@
         }
 
         @Override
+        public ILogicalOperator visitDistributeResultOperator(DistributeResultOperator op, Void arg)
+                throws AlgebricksException {
+            ArrayList<Mutable<ILogicalExpression>> newExpressions = new ArrayList<Mutable<ILogicalExpression>>();
+            deepCopyExpressionRefs(newExpressions, op.getExpressions());
+            return new DistributeResultOperator(newExpressions, op.getDataSink());
+        }
+
+        @Override
         public ILogicalOperator visitWriteResultOperator(WriteResultOperator op, Void arg) throws AlgebricksException {
             ArrayList<Mutable<ILogicalExpression>> newKeyExpressions = new ArrayList<Mutable<ILogicalExpression>>();
             deepCopyExpressionRefs(newKeyExpressions, op.getKeyExpressions());
@@ -784,8 +804,8 @@
             deepCopyExpressionRefs(newPrimaryKeyExpressions, op.getPrimaryKeyExpressions());
             List<Mutable<ILogicalExpression>> newSecondaryKeyExpressions = new ArrayList<Mutable<ILogicalExpression>>();
             deepCopyExpressionRefs(newSecondaryKeyExpressions, op.getSecondaryKeyExpressions());
-            Mutable<ILogicalExpression> newFilterExpression = new MutableObject<ILogicalExpression>(((AbstractLogicalExpression)op.getFilterExpression())
-                    .cloneExpression());
+            Mutable<ILogicalExpression> newFilterExpression = new MutableObject<ILogicalExpression>(
+                    ((AbstractLogicalExpression) op.getFilterExpression()).cloneExpression());
             return new IndexInsertDeleteOperator(op.getDataSourceIndex(), newPrimaryKeyExpressions,
                     newSecondaryKeyExpressions, newFilterExpression, op.getOperation());
         }
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/IsomorphismVariableMappingVisitor.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/IsomorphismVariableMappingVisitor.java
index 562bb4c..b9544c7 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/IsomorphismVariableMappingVisitor.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/IsomorphismVariableMappingVisitor.java
@@ -37,8 +37,10 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DataSourceScanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DieOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistinctOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistributeResultOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.EmptyTupleSourceOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExchangeOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.GroupByOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.IndexInsertDeleteOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.InnerJoinOperator;
@@ -54,7 +56,6 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ScriptOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SelectOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SinkOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SubplanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnionAllOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestMapOperator;
@@ -230,6 +231,13 @@
     }
 
     @Override
+    public Void visitDistributeResultOperator(DistributeResultOperator op, ILogicalOperator arg)
+            throws AlgebricksException {
+        mapVariablesStandard(op, arg);
+        return null;
+    }
+
+    @Override
     public Void visitWriteResultOperator(WriteResultOperator op, ILogicalOperator arg) throws AlgebricksException {
         mapVariablesStandard(op, arg);
         return null;
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/LogicalPropertiesVisitor.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/LogicalPropertiesVisitor.java
index 9b2f5a0..8f1d686 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/LogicalPropertiesVisitor.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/LogicalPropertiesVisitor.java
@@ -29,8 +29,10 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DataSourceScanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DieOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistinctOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistributeResultOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.EmptyTupleSourceOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExchangeOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.GroupByOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.IndexInsertDeleteOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.InnerJoinOperator;
@@ -46,7 +48,6 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ScriptOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SelectOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SinkOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SubplanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnionAllOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestMapOperator;
@@ -240,6 +241,12 @@
     }
 
     @Override
+    public Void visitDistributeResultOperator(DistributeResultOperator op, IOptimizationContext arg)
+            throws AlgebricksException {
+        return null;
+    }
+
+    @Override
     public Void visitWriteResultOperator(WriteResultOperator op, IOptimizationContext arg) throws AlgebricksException {
         // TODO Auto-generated method stub
         return null;
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/ProducedVariableVisitor.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/ProducedVariableVisitor.java
index 78b6801..31adcba 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/ProducedVariableVisitor.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/ProducedVariableVisitor.java
@@ -32,8 +32,10 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DataSourceScanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DieOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistinctOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistributeResultOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.EmptyTupleSourceOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExchangeOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.GroupByOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.IndexInsertDeleteOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.InnerJoinOperator;
@@ -49,7 +51,6 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ScriptOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SelectOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SinkOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SubplanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnionAllOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestMapOperator;
@@ -223,6 +224,11 @@
     }
 
     @Override
+    public Void visitDistributeResultOperator(DistributeResultOperator op, Void arg) throws AlgebricksException {
+        return null;
+    }
+
+    @Override
     public Void visitWriteResultOperator(WriteResultOperator op, Void arg) throws AlgebricksException {
         return null;
     }
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/SchemaVariableVisitor.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/SchemaVariableVisitor.java
index a759e35..cd0cee3 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/SchemaVariableVisitor.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/SchemaVariableVisitor.java
@@ -31,8 +31,10 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DataSourceScanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DieOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistinctOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistributeResultOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.EmptyTupleSourceOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExchangeOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.GroupByOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.IndexInsertDeleteOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.InnerJoinOperator;
@@ -48,7 +50,6 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ScriptOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SelectOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SinkOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SubplanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnionAllOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestMapOperator;
@@ -238,6 +239,12 @@
     }
 
     @Override
+    public Void visitDistributeResultOperator(DistributeResultOperator op, Void arg) throws AlgebricksException {
+        standardLayout(op);
+        return null;
+    }
+
+    @Override
     public Void visitWriteResultOperator(WriteResultOperator op, Void arg) throws AlgebricksException {
         standardLayout(op);
         return null;
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/SubstituteVariableVisitor.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/SubstituteVariableVisitor.java
index 11e56ca..69fb3f8 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/SubstituteVariableVisitor.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/SubstituteVariableVisitor.java
@@ -33,8 +33,10 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DataSourceScanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DieOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistinctOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistributeResultOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.EmptyTupleSourceOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExchangeOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.GroupByOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.IndexInsertDeleteOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.InnerJoinOperator;
@@ -51,7 +53,6 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ScriptOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SelectOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SinkOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SubplanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnionAllOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestMapOperator;
@@ -335,6 +336,16 @@
     }
 
     @Override
+    public Void visitDistributeResultOperator(DistributeResultOperator op, Pair<LogicalVariable, LogicalVariable> pair)
+            throws AlgebricksException {
+        for (Mutable<ILogicalExpression> e : op.getExpressions()) {
+            e.getValue().substituteVar(pair.first, pair.second);
+        }
+        substVarTypes(op, pair);
+        return null;
+    }
+
+    @Override
     public Void visitWriteResultOperator(WriteResultOperator op, Pair<LogicalVariable, LogicalVariable> pair)
             throws AlgebricksException {
         op.getPayloadExpression().getValue().substituteVar(pair.first, pair.second);
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/UsedVariableVisitor.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/UsedVariableVisitor.java
index 0ea9367..5361a19 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/UsedVariableVisitor.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/logical/visitors/UsedVariableVisitor.java
@@ -32,6 +32,7 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DataSourceScanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DieOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistinctOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistributeResultOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.EmptyTupleSourceOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExchangeOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
@@ -304,6 +305,14 @@
     }
 
     @Override
+    public Void visitDistributeResultOperator(DistributeResultOperator op, Void arg) {
+        for (Mutable<ILogicalExpression> expr : op.getExpressions()) {
+            expr.getValue().getUsedVariables(usedVariables);
+        }
+        return null;
+    }
+
+    @Override
     public Void visitWriteResultOperator(WriteResultOperator op, Void arg) {
         op.getPayloadExpression().getValue().getUsedVariables(usedVariables);
         for (Mutable<ILogicalExpression> e : op.getKeyExpressions()) {
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/DistributeResultPOperator.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/DistributeResultPOperator.java
new file mode 100644
index 0000000..302d4d2
--- /dev/null
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/operators/physical/DistributeResultPOperator.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.algebricks.core.algebra.operators.physical;
+
+import org.apache.commons.lang3.mutable.Mutable;
+
+import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraint;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.NotImplementedException;
+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.ILogicalExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.IOptimizationContext;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalExpressionTag;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.PhysicalOperatorTag;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IDataSink;
+import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistributeResultOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.IOperatorSchema;
+import edu.uci.ics.hyracks.algebricks.core.algebra.properties.IPartitioningProperty;
+import edu.uci.ics.hyracks.algebricks.core.algebra.properties.IPartitioningRequirementsCoordinator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.properties.IPhysicalPropertiesVector;
+import edu.uci.ics.hyracks.algebricks.core.algebra.properties.PhysicalRequirements;
+import edu.uci.ics.hyracks.algebricks.core.algebra.properties.StructuralPropertiesVector;
+import edu.uci.ics.hyracks.algebricks.core.jobgen.impl.JobGenContext;
+import edu.uci.ics.hyracks.algebricks.core.jobgen.impl.JobGenHelper;
+import edu.uci.ics.hyracks.algebricks.data.IPrinterFactory;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+
+public class DistributeResultPOperator extends AbstractPhysicalOperator {
+
+    @Override
+    public PhysicalOperatorTag getOperatorTag() {
+        return PhysicalOperatorTag.DISTRIBUTE_RESULT;
+    }
+
+    @Override
+    public boolean isMicroOperator() {
+        return false;
+    }
+
+    @Override
+    public void computeDeliveredProperties(ILogicalOperator op, IOptimizationContext context) {
+        ILogicalOperator op2 = op.getInputs().get(0).getValue();
+        deliveredProperties = op2.getDeliveredPhysicalProperties().clone();
+    }
+
+    @Override
+    public PhysicalRequirements getRequiredPropertiesForChildren(ILogicalOperator op,
+            IPhysicalPropertiesVector reqdByParent) {
+        DistributeResultOperator write = (DistributeResultOperator) op;
+        IDataSink sink = write.getDataSink();
+        IPartitioningProperty pp = sink.getPartitioningProperty();
+        StructuralPropertiesVector[] r = new StructuralPropertiesVector[] { new StructuralPropertiesVector(pp, null) };
+        return new PhysicalRequirements(r, IPartitioningRequirementsCoordinator.NO_COORDINATION);
+    }
+
+    @SuppressWarnings({ "rawtypes", "unchecked" })
+    @Override
+    public void contributeRuntimeOperator(IHyracksJobBuilder builder, JobGenContext context, ILogicalOperator op,
+            IOperatorSchema propagatedSchema, IOperatorSchema[] inputSchemas, IOperatorSchema outerPlanSchema)
+            throws AlgebricksException {
+        DistributeResultOperator resultOp = (DistributeResultOperator) op;
+        IMetadataProvider mp = context.getMetadataProvider();
+
+        JobSpecification spec = builder.getJobSpec();
+
+        int[] columns = new int[resultOp.getExpressions().size()];
+        int i = 0;
+        for (Mutable<ILogicalExpression> exprRef : resultOp.getExpressions()) {
+            ILogicalExpression expr = exprRef.getValue();
+            if (expr.getExpressionTag() != LogicalExpressionTag.VARIABLE) {
+                throw new NotImplementedException("Only writing variable expressions is supported.");
+            }
+            VariableReferenceExpression varRef = (VariableReferenceExpression) expr;
+            LogicalVariable v = varRef.getVariableReference();
+            columns[i++] = inputSchemas[0].findVariable(v);
+        }
+        RecordDescriptor inputDesc = JobGenHelper.mkRecordDescriptor(
+                context.getTypeEnvironment(op.getInputs().get(0).getValue()), inputSchemas[0], context);
+
+        IPrinterFactory[] pf = JobGenHelper.mkPrinterFactories(inputSchemas[0], context.getTypeEnvironment(op),
+                context, columns);
+
+        Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> runtimeAndConstraints = mp.getResultHandleRuntime(
+                resultOp.getDataSink(), columns, pf, inputDesc, false, spec);
+
+        builder.contributeHyracksOperator(resultOp, runtimeAndConstraints.first);
+        builder.contributeAlgebricksPartitionConstraint(runtimeAndConstraints.first, runtimeAndConstraints.second);
+        ILogicalOperator src = resultOp.getInputs().get(0).getValue();
+        builder.contributeGraphEdge(src, 0, resultOp, 0);
+    }
+}
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 a94c78e..fc0c433 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
@@ -30,8 +30,10 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DataSourceScanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DieOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistinctOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistributeResultOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.EmptyTupleSourceOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExchangeOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.GroupByOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.IndexInsertDeleteOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.InnerJoinOperator;
@@ -48,7 +50,6 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ScriptOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SelectOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SinkOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SubplanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnionAllOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestMapOperator;
@@ -164,6 +165,13 @@
     }
 
     @Override
+    public String visitDistributeResultOperator(DistributeResultOperator op, Integer indent) {
+        StringBuilder buffer = new StringBuilder();
+        addIndent(buffer, indent).append("distribute result ").append(op.getExpressions());
+        return buffer.toString();
+    }
+
+    @Override
     public String visitWriteResultOperator(WriteResultOperator op, Integer indent) {
         StringBuilder buffer = new StringBuilder();
         addIndent(buffer, indent).append("load ").append(op.getDataSource()).append(" from ")
diff --git a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/visitors/ILogicalOperatorVisitor.java b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/visitors/ILogicalOperatorVisitor.java
index 6b5949e..23dac2a 100644
--- a/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/visitors/ILogicalOperatorVisitor.java
+++ b/algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/visitors/ILogicalOperatorVisitor.java
@@ -20,8 +20,10 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DataSourceScanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DieOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistinctOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.DistributeResultOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.EmptyTupleSourceOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExchangeOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.GroupByOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.IndexInsertDeleteOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.InnerJoinOperator;
@@ -37,7 +39,6 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ScriptOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SelectOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SinkOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExtensionOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SubplanOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnionAllOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestMapOperator;
@@ -97,6 +98,8 @@
 
     public R visitWriteOperator(WriteOperator op, T arg) throws AlgebricksException;
 
+    public R visitDistributeResultOperator(DistributeResultOperator op, T arg) throws AlgebricksException;
+
     public R visitWriteResultOperator(WriteResultOperator op, T arg) throws AlgebricksException;
 
     public R visitInsertDeleteOperator(InsertDeleteOperator op, T tag) throws AlgebricksException;
diff --git a/algebricks/algebricks-data/pom.xml b/algebricks/algebricks-data/pom.xml
index 9536416..9d42a5c 100644
--- a/algebricks/algebricks-data/pom.xml
+++ b/algebricks/algebricks-data/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,12 +27,12 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-common</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-data-std</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-data/src/main/java/edu/uci/ics/hyracks/algebricks/data/IResultSerializerFactoryProvider.java b/algebricks/algebricks-data/src/main/java/edu/uci/ics/hyracks/algebricks/data/IResultSerializerFactoryProvider.java
new file mode 100644
index 0000000..5e62612
--- /dev/null
+++ b/algebricks/algebricks-data/src/main/java/edu/uci/ics/hyracks/algebricks/data/IResultSerializerFactoryProvider.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.algebricks.data;
+
+import java.io.Serializable;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IResultSerializerFactory;
+
+public interface IResultSerializerFactoryProvider extends Serializable {
+    /**
+     * Returns a result serializer factory
+     * 
+     * @param fields
+     *            - A position of the fields in the order it should be written in the output.
+     * @param printerFactories
+     *            - A printer factory array to print the tuple containing different fields.
+     * @param writerFactory
+     *            - A writer factory to write the serialized data to the print stream.
+     * @param inputRecordDesc
+     *            - The record descriptor describing the input frame to be serialized.
+     * @return A new instance of result serialized appender.
+     */
+    public IResultSerializerFactory getAqlResultSerializerFactoryProvider(int[] fields,
+            IPrinterFactory[] printerFactories, IAWriterFactory writerFactory);
+}
diff --git a/algebricks/algebricks-examples/piglet-example/pom.xml b/algebricks/algebricks-examples/piglet-example/pom.xml
index ca7467b..d4d6c89 100644
--- a/algebricks/algebricks-examples/piglet-example/pom.xml
+++ b/algebricks/algebricks-examples/piglet-example/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>algebricks-examples</artifactId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -54,7 +54,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>junit</groupId>
diff --git a/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/compiler/PigletCompiler.java b/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/compiler/PigletCompiler.java
index d105759..2981157 100644
--- a/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/compiler/PigletCompiler.java
+++ b/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/compiler/PigletCompiler.java
@@ -127,9 +127,9 @@
             }
         });
         builder.setTypeTraitProvider(new ITypeTraitProvider() {
-			public ITypeTraits getTypeTrait(Object type) {
-				return null;
-			}
+            public ITypeTraits getTypeTrait(Object type) {
+                return null;
+            }
         });
         builder.setPrinterProvider(PigletPrinterFactoryProvider.INSTANCE);
         builder.setExpressionRuntimeProvider(new LogicalExpressionJobGenToExpressionRuntimeProviderAdapter(
diff --git a/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/metadata/PigletMetadataProvider.java b/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/metadata/PigletMetadataProvider.java
index d678803..15b290e 100644
--- a/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/metadata/PigletMetadataProvider.java
+++ b/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/metadata/PigletMetadataProvider.java
@@ -145,6 +145,13 @@
     }
 
     @Override
+    public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getResultHandleRuntime(IDataSink sink,
+            int[] printColumns, IPrinterFactory[] printerFactories, RecordDescriptor inputDesc, boolean ordered,
+            JobSpecification spec) throws AlgebricksException {
+        return null;
+    }
+
+    @Override
     public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getWriteResultRuntime(
             IDataSource<String> dataSource, IOperatorSchema propagatedSchema, List<LogicalVariable> keys,
             LogicalVariable payLoadVar, JobGenContext context, JobSpecification jobSpec) throws AlgebricksException {
diff --git a/algebricks/algebricks-examples/pom.xml b/algebricks/algebricks-examples/pom.xml
index e538712..fc8188d 100644
--- a/algebricks/algebricks-examples/pom.xml
+++ b/algebricks/algebricks-examples/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/algebricks/algebricks-rewriter/pom.xml b/algebricks/algebricks-rewriter/pom.xml
index 7968773..e40f1fe 100644
--- a/algebricks/algebricks-rewriter/pom.xml
+++ b/algebricks/algebricks-rewriter/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,7 +27,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>algebricks-core</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   	</dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/SetAlgebricksPhysicalOperatorsRule.java b/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/SetAlgebricksPhysicalOperatorsRule.java
index 38cf96e..60a4fbb 100644
--- a/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/SetAlgebricksPhysicalOperatorsRule.java
+++ b/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/SetAlgebricksPhysicalOperatorsRule.java
@@ -38,6 +38,7 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.physical.AggregatePOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.physical.AssignPOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.physical.DataSourceScanPOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.physical.DistributeResultPOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.physical.EmptyTupleSourcePOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.physical.ExternalGroupByPOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.physical.InMemoryStableSortPOperator;
@@ -245,6 +246,10 @@
                     op.setPhysicalOperator(new SinkWritePOperator());
                     break;
                 }
+                case DISTRIBUTE_RESULT: {
+                    op.setPhysicalOperator(new DistributeResultPOperator());
+                    break;
+                }
                 case WRITE_RESULT: {
                     WriteResultOperator opLoad = (WriteResultOperator) op;
                     LogicalVariable payload;
@@ -267,8 +272,8 @@
                     List<LogicalVariable> secondaryKeys = new ArrayList<LogicalVariable>();
                     getKeys(opInsDel.getPrimaryKeyExpressions(), primaryKeys);
                     getKeys(opInsDel.getSecondaryKeyExpressions(), secondaryKeys);
-                    op.setPhysicalOperator(new IndexInsertDeletePOperator(primaryKeys, secondaryKeys, 
-                    		opInsDel.getFilterExpression(), opInsDel.getDataSourceIndex()));
+                    op.setPhysicalOperator(new IndexInsertDeletePOperator(primaryKeys, secondaryKeys, opInsDel
+                            .getFilterExpression(), opInsDel.getDataSourceIndex()));
                     break;
                 }
                 case SINK: {
diff --git a/algebricks/algebricks-runtime/pom.xml b/algebricks/algebricks-runtime/pom.xml
index e438283..3ddde0f 100644
--- a/algebricks/algebricks-runtime/pom.xml
+++ b/algebricks/algebricks-runtime/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,27 +27,27 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-storage-am-btree</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-storage-am-rtree</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-dataflow-std</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-common</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-data</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/serializer/ResultSerializerFactoryProvider.java b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/serializer/ResultSerializerFactoryProvider.java
new file mode 100644
index 0000000..4f28c81
--- /dev/null
+++ b/algebricks/algebricks-runtime/src/main/java/edu/uci/ics/hyracks/algebricks/runtime/serializer/ResultSerializerFactoryProvider.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.algebricks.runtime.serializer;
+
+import java.io.PrintStream;
+import java.nio.BufferOverflowException;
+
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.data.IAWriter;
+import edu.uci.ics.hyracks.algebricks.data.IAWriterFactory;
+import edu.uci.ics.hyracks.algebricks.data.IPrinterFactory;
+import edu.uci.ics.hyracks.algebricks.data.IResultSerializerFactoryProvider;
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.api.dataflow.value.IResultSerializer;
+import edu.uci.ics.hyracks.api.dataflow.value.IResultSerializerFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public class ResultSerializerFactoryProvider implements IResultSerializerFactoryProvider {
+    private static final long serialVersionUID = 1L;
+
+    public static final ResultSerializerFactoryProvider INSTANCE = new ResultSerializerFactoryProvider();
+
+    private ResultSerializerFactoryProvider() {
+    }
+
+    @Override
+    public IResultSerializerFactory getAqlResultSerializerFactoryProvider(final int[] fields,
+            final IPrinterFactory[] printerFactories, final IAWriterFactory writerFactory) {
+        return new IResultSerializerFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public IResultSerializer createResultSerializer(RecordDescriptor inputRecordDesc, PrintStream printStream) {
+                final IAWriter writer = writerFactory.createWriter(fields, printStream, printerFactories,
+                        inputRecordDesc);
+
+                return new IResultSerializer() {
+                    private static final long serialVersionUID = 1L;
+
+                    @Override
+                    public void init() throws HyracksDataException {
+                        try {
+                            writer.init();
+                        } catch (AlgebricksException e) {
+                            throw new HyracksDataException(e);
+                        }
+                    }
+
+                    @Override
+                    public boolean appendTuple(IFrameTupleAccessor tAccess, int tIdx) throws HyracksDataException {
+                        try {
+                            writer.printTuple(tAccess, tIdx);
+                        } catch (BufferOverflowException e) {
+                            return false;
+                        } catch (AlgebricksException e) {
+                            throw new HyracksDataException(e);
+                        }
+                        return true;
+                    }
+                };
+            }
+        };
+    }
+}
diff --git a/algebricks/algebricks-tests/pom.xml b/algebricks/algebricks-tests/pom.xml
index c114881..0a139fa 100644
--- a/algebricks/algebricks-tests/pom.xml
+++ b/algebricks/algebricks-tests/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -85,7 +85,7 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>algebricks-compiler</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>junit</groupId>
@@ -96,17 +96,17 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-control-cc</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-control-nc</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-data-std</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/algebricks/algebricks-tests/src/test/java/edu/uci/ics/hyracks/algebricks/tests/util/AlgebricksHyracksIntegrationUtil.java b/algebricks/algebricks-tests/src/test/java/edu/uci/ics/hyracks/algebricks/tests/util/AlgebricksHyracksIntegrationUtil.java
index b5c4b47..dad7cd0 100644
--- a/algebricks/algebricks-tests/src/test/java/edu/uci/ics/hyracks/algebricks/tests/util/AlgebricksHyracksIntegrationUtil.java
+++ b/algebricks/algebricks-tests/src/test/java/edu/uci/ics/hyracks/algebricks/tests/util/AlgebricksHyracksIntegrationUtil.java
@@ -3,9 +3,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * you may obtain a copy of the License from
- * 
+ *
  *     http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -55,6 +55,7 @@
         ncConfig1.ccPort = TEST_HYRACKS_CC_CLUSTER_NET_PORT;
         ncConfig1.clusterNetIPAddress = "127.0.0.1";
         ncConfig1.dataIPAddress = "127.0.0.1";
+        ncConfig1.datasetIPAddress = "127.0.0.1";
         ncConfig1.nodeId = NC1_ID;
         nc1 = new NodeControllerService(ncConfig1);
         nc1.start();
@@ -64,6 +65,7 @@
         ncConfig2.ccPort = TEST_HYRACKS_CC_CLUSTER_NET_PORT;
         ncConfig2.clusterNetIPAddress = "127.0.0.1";
         ncConfig2.dataIPAddress = "127.0.0.1";
+        ncConfig2.datasetIPAddress = "127.0.0.1";
         ncConfig2.nodeId = NC2_ID;
         nc2 = new NodeControllerService(ncConfig2);
         nc2.start();
@@ -85,4 +87,4 @@
         hcc.waitForCompletion(jobId);
     }
 
-}
\ No newline at end of file
+}
diff --git a/algebricks/pom.xml b/algebricks/pom.xml
index ebb8332..aa8446a 100644
--- a/algebricks/pom.xml
+++ b/algebricks/pom.xml
@@ -2,7 +2,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>algebricks</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>algebricks</name>
 
diff --git a/genomix/genomix-data/pom.xml b/genomix/genomix-data/pom.xml
index 0d99c4a..5ce538f 100644
--- a/genomix/genomix-data/pom.xml
+++ b/genomix/genomix-data/pom.xml
@@ -8,7 +8,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>genomix</artifactId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 	<properties>
diff --git a/genomix/genomix-hadoop/pom.xml b/genomix/genomix-hadoop/pom.xml
index 10223c9..195ce7f 100755
--- a/genomix/genomix-hadoop/pom.xml
+++ b/genomix/genomix-hadoop/pom.xml
@@ -8,7 +8,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>genomix</artifactId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 	<properties>
@@ -151,7 +151,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>genomix-data</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/genomix/genomix-hyracks/pom.xml b/genomix/genomix-hyracks/pom.xml
index 0dd2486..6d13bc9 100644
--- a/genomix/genomix-hyracks/pom.xml
+++ b/genomix/genomix-hyracks/pom.xml
@@ -8,7 +8,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>genomix</artifactId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 	<properties>
@@ -167,40 +167,40 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -214,13 +214,13 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks.examples</groupId>
 			<artifactId>hyracks-integration-tests</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-ipc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -237,19 +237,19 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-hdfs-core</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-hdfs-core</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>test-jar</type>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>genomix-data</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/genomix/genomix-pregelix/pom.xml b/genomix/genomix-pregelix/pom.xml
index d74d954..cb74294 100644
--- a/genomix/genomix-pregelix/pom.xml
+++ b/genomix/genomix-pregelix/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.pregelix</groupId>
   <artifactId>genomix-pregelix</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <name>genomix-pregelix</name>
 
   <properties>
@@ -100,14 +100,14 @@
                 <dependency>
                 	<groupId>edu.uci.ics.hyracks</groupId>
                 	<artifactId>pregelix-core</artifactId>
-                	<version>0.2.3-SNAPSHOT</version>
+                	<version>0.2.4-SNAPSHOT</version>
                 	<type>jar</type>
                 	<scope>compile</scope>
                 </dependency>
                 <dependency>
                 	<groupId>edu.uci.ics.hyracks</groupId>
                 	<artifactId>pregelix-example</artifactId>
-                	<version>0.2.3-SNAPSHOT</version>
+                	<version>0.2.4-SNAPSHOT</version>
                 	<type>jar</type>
                 	<scope>compile</scope>
                 </dependency>
diff --git a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/JobGen/JobGenerator.java b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/JobGen/JobGenerator.java
index c0531ff..7ac4093 100644
--- a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/JobGen/JobGenerator.java
+++ b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/JobGen/JobGenerator.java
@@ -66,6 +66,7 @@
     	job.setVertexClass(LogAlgorithmForMergeGraphVertex.class);
         job.setVertexInputFormatClass(LogAlgorithmForMergeGraphInputFormat.class); 
         job.setVertexOutputFormatClass(LogAlgorithmForMergeGraphOutputFormat.class);
+        job.setDynamicVertexValueSize(true);
         job.setOutputKeyClass(BytesWritable.class);
         job.setOutputValueClass(ByteWritable.class);
         FileInputFormat.setInputPaths(job, HDFS_INPUTPATH);
diff --git a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/JobRun/RunJobTestSuite.java b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/JobRun/RunJobTestSuite.java
index 090c57a..f347501 100644
--- a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/JobRun/RunJobTestSuite.java
+++ b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/JobRun/RunJobTestSuite.java
@@ -55,7 +55,7 @@
 		ClusterConfig.setStorePath(PATH_TO_CLUSTER_STORE);
 		ClusterConfig.setClusterPropertiesPath(PATH_TO_CLUSTER_PROPERTIES);
 		cleanupStores();
-		PregelixHyracksIntegrationUtil.init();
+		PregelixHyracksIntegrationUtil.init("src/test/resources/topology.xml");
 		PregelixHyracksIntegrationUtil.createApp(HYRACKS_APP_NAME);
 		LOGGER.info("Hyracks mini-cluster started");
 		FileUtils.forceMkdir(new File(ACTUAL_RESULT_DIR));
diff --git a/genomix/pom.xml b/genomix/pom.xml
index 9851681..6fd28e8 100644
--- a/genomix/pom.xml
+++ b/genomix/pom.xml
@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>edu.uci.ics.hyracks</groupId>
 	<artifactId>genomix</artifactId>
-	<version>0.2.3-SNAPSHOT</version>
+	<version>0.2.4-SNAPSHOT</version>
     <packaging>pom</packaging>
 	<name>genomix</name>
 
diff --git a/hivesterix/hivesterix-common/pom.xml b/hivesterix/hivesterix-common/pom.xml
index 33d8fb3..597de1b 100644
--- a/hivesterix/hivesterix-common/pom.xml
+++ b/hivesterix/hivesterix-common/pom.xml
@@ -1,7 +1,5 @@
 <?xml version="1.0"?>
-<project
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
-	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<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>
 	<name>hivesterix-common</name>
@@ -9,7 +7,7 @@
 	<parent>
 		<artifactId>hivesterix</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -32,21 +30,21 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-hdfs-core</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hivesterix/hivesterix-common/src/main/java/edu/uci/ics/hivesterix/common/config/ConfUtil.java b/hivesterix/hivesterix-common/src/main/java/edu/uci/ics/hivesterix/common/config/ConfUtil.java
index 666d361..648deb6 100644
--- a/hivesterix/hivesterix-common/src/main/java/edu/uci/ics/hivesterix/common/config/ConfUtil.java
+++ b/hivesterix/hivesterix-common/src/main/java/edu/uci/ics/hivesterix/common/config/ConfUtil.java
@@ -1,7 +1,6 @@
 package edu.uci.ics.hivesterix.common.config;
 
 import java.io.BufferedReader;
-import java.io.DataInputStream;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.io.InputStreamReader;
@@ -28,6 +27,7 @@
 @SuppressWarnings({ "rawtypes", "deprecation" })
 public class ConfUtil {
     private static final String clusterPropertiesPath = "conf/cluster.properties";
+    private static final String masterFilePath = "conf/master";
 
     private static JobConf job;
     private static HiveConf hconf;
@@ -134,15 +134,27 @@
                 clusterProps.load(confIn);
                 confIn.close();
             }
-            Process process = Runtime.getRuntime().exec("src/main/resources/scripts/getip.sh");
-            BufferedReader ipReader = new BufferedReader(new InputStreamReader(new DataInputStream(
-                    process.getInputStream())));
-            String ipAddress = ipReader.readLine();
-            ipReader.close();
-            int port = Integer.parseInt(clusterProps.getProperty("CC_CLIENTPORT"));
-            int mpl = Integer.parseInt(hconf.get("hive.hyracks.parrallelism"));
 
-            hcc = new HyracksConnection(ipAddress, port);
+            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;
+                        }
+                    }
+                }
+            }
+
+            int mpl = Integer.parseInt(hconf.get("hive.hyracks.parrallelism"));
             topology = hcc.getClusterTopology();
             ncNameToNcInfos = hcc.getNodeControllerInfos();
             NCs = new String[ncNameToNcInfos.size() * mpl];
diff --git a/hivesterix/hivesterix-dist/pom.xml b/hivesterix/hivesterix-dist/pom.xml
index ce61422..910d2d2 100644
--- a/hivesterix/hivesterix-dist/pom.xml
+++ b/hivesterix/hivesterix-dist/pom.xml
@@ -1,517 +1,518 @@
-<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>0.2.3-SNAPSHOT</version>
-	<name>hivesterix-dist</name>
-	<dependencies>
-		<dependency>
-			<groupId>javax.servlet</groupId>
-			<artifactId>servlet-api</artifactId>
-			<version>2.5</version>
-			<type>jar</type>
-			<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>org.apache.hadoop</groupId>
-			<artifactId>hadoop-core</artifactId>
-			<version>0.20.2</version>
-		</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>org.apache.hadoop</groupId>
-			<artifactId>hadoop-test</artifactId>
-			<version>0.20.2</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>
-		</dependency>
-		<dependency>
-			<groupId>edu.uci.ics.hyracks</groupId>
-			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>edu.uci.ics.hyracks</groupId>
-			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>edu.uci.ics.hyracks</groupId>
-			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>edu.uci.ics.hyracks</groupId>
-			<artifactId>hivesterix-translator</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>edu.uci.ics.hyracks</groupId>
-			<artifactId>hivesterix-optimizer</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-	</dependencies>
-	<build>
-		<plugins>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-compiler-plugin</artifactId>
-				<version>2.0.2</version>
-				<configuration>
-					<source>1.7</source>
-					<target>1.7</target>
-					<encoding>UTF-8</encoding>
-					<fork>true</fork>
-				</configuration>
-			</plugin>
-			<plugin>
-				<artifactId>maven-jar-plugin</artifactId>
-				<executions>
-					<execution>
-						<id>patch</id>
-						<goals>
-							<goal>jar</goal>
-						</goals>
-						<phase>package</phase>
-						<configuration>
-							<classifier>patch</classifier>
-							<finalName>a-hive</finalName>
-							<includes>
-								<include>**/org/apache/**</include>
-							</includes>
-						</configuration>
-					</execution>
-				</executions>
-			</plugin>
-			<plugin>
-				<groupId>org.codehaus.mojo</groupId>
-				<artifactId>appassembler-maven-plugin</artifactId>
-				<version>1.3</version>
-				<executions>
-					<execution>
-						<configuration>
-							<programs>
-								<program>
-									<mainClass>edu.uci.ics.asterix.hive.cli.CliDriver</mainClass>
-									<name>algebricks-hivesterix-cmd</name>
-								</program>
-							</programs>
-							<repositoryLayout>flat</repositoryLayout>
-							<repositoryName>lib</repositoryName>
-						</configuration>
-						<phase>package</phase>
-						<goals>
-							<goal>assemble</goal>
-						</goals>
-					</execution>
-				</executions>
-			</plugin>
-			<plugin>
-				<artifactId>maven-assembly-plugin</artifactId>
-				<version>2.2-beta-5</version>
-				<executions>
-					<execution>
-						<configuration>
-							<descriptors>
-								<descriptor>src/main/assembly/binary-assembly.xml</descriptor>
-							</descriptors>
-						</configuration>
-						<phase>package</phase>
-						<goals>
-							<goal>attached</goal>
-						</goals>
-					</execution>
-				</executions>
-			</plugin>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-surefire-plugin</artifactId>
-				<version>2.13</version>
-				<configuration>
-					<forkMode>pertest</forkMode>
-					<argLine>-enableassertions -Xmx2047m -Dfile.encoding=UTF-8
-						-Djava.util.logging.config.file=src/test/resources/logging.properties</argLine>
-					<includes>
-						<include>**/test/optimizer/*TestSuite.java</include>
-						<include>**/test/optimizer/*Test.java</include>
-						<include>**/test/runtimefunction/*TestSuite.java</include>
-						<include>**/test/runtimefunction/*Test.java</include>
-					</includes>
-				</configuration>
-			</plugin>
-			<plugin>
-				<artifactId>maven-resources-plugin</artifactId>
-				<version>2.5</version>
-				<executions>
-					<execution>
-						<id>copy-scripts</id>
-						<!-- here the phase you need -->
-						<phase>package</phase>
-						<goals>
-							<goal>copy-resources</goal>
-						</goals>
-						<configuration>
-							<outputDirectory>target/appassembler/bin</outputDirectory>
-							<resources>
-								<resource>
-									<directory>src/main/resources/scripts</directory>
-								</resource>
-							</resources>
-						</configuration>
-					</execution>
-					<execution>
-						<id>copy-conf</id>
-						<!-- here the phase you need -->
-						<phase>package</phase>
-						<goals>
-							<goal>copy-resources</goal>
-						</goals>
-						<configuration>
-							<outputDirectory>target/appassembler/conf</outputDirectory>
-							<resources>
-								<resource>
-									<directory>src/main/resources/conf</directory>
-								</resource>
-							</resources>
-						</configuration>
-					</execution>
-					<execution>
-						<id>copy-jar</id>
-						<!-- here the phase you need -->
-						<phase>package</phase>
-						<goals>
-							<goal>copy-resources</goal>
-						</goals>
-						<configuration>
-							<outputDirectory>target/appassembler/lib</outputDirectory>
-							<resources>
-								<resource>
-									<directory>target</directory>
-									<includes>
-										<include>*patch.jar</include>
-									</includes>
-								</resource>
-							</resources>
-						</configuration>
-					</execution>
-				</executions>
-			</plugin>
-			<plugin>
-				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
-				<configuration>
-					<filesets>
-						<fileset>
-							<directory>.</directory>
-							<includes>
-								<include>metastore*</include>
-								<include>hadoop*</include>
-								<include>edu*</include>
-								<include>tmp*</include>
-								<include>build*</include>
-								<include>target*</include>
-								<include>log*</include>
-								<include>derby.log</include>
-								<include>ClusterController*</include>
-							</includes>
-						</fileset>
-					</filesets>
-				</configuration>
-			</plugin>
-		</plugins>
-	</build>
-	<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>third-party</id>
-			<url>http://obelix.ics.uci.edu/nexus/content/repositories/third-party</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>hyracks-public-release</id>
-			<url>http://obelix.ics.uci.edu/nexus/content/repositories/hyracks-public-releases</url>
-		</repository>
-	</repositories>
-</project>
+<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>0.2.4-SNAPSHOT</version>
+	<name>hivesterix-dist</name>
+
+	<parent>
+                <groupId>edu.uci.ics.hyracks</groupId>
+                <artifactId>hivesterix</artifactId>
+                <version>0.2.4-SNAPSHOT</version>
+        </parent>
+
+	<dependencies>
+		<dependency>
+			<groupId>javax.servlet</groupId>
+			<artifactId>servlet-api</artifactId>
+			<version>2.5</version>
+			<type>jar</type>
+			<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>0.2.4-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hivesterix-optimizer</artifactId>
+			<version>0.2.4-SNAPSHOT</version>
+			<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>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>algebricks-compiler</artifactId>
+			<version>0.2.4-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-control-cc</artifactId>
+			<version>0.2.4-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-control-nc</artifactId>
+			<version>0.2.4-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>2.0.2</version>
+				<configuration>
+					<source>1.7</source>
+					<target>1.7</target>
+					<encoding>UTF-8</encoding>
+					<fork>true</fork>
+				</configuration>
+			</plugin>
+			<plugin>
+				<artifactId>maven-jar-plugin</artifactId>
+				<executions>
+					<execution>
+						<id>patch</id>
+						<goals>
+							<goal>jar</goal>
+						</goals>
+						<phase>package</phase>
+						<configuration>
+							<classifier>patch</classifier>
+							<finalName>a-hive</finalName>
+							<includes>
+								<include>**/org/apache/**</include>
+							</includes>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+			<plugin>
+				<groupId>org.codehaus.mojo</groupId>
+				<artifactId>appassembler-maven-plugin</artifactId>
+				<version>1.3</version>
+				<executions>
+					<execution>
+						<configuration>
+							<programs>
+								<program>
+									<mainClass>edu.uci.ics.asterix.hive.cli.CliDriver</mainClass>
+									<name>algebricks-hivesterix-cmd</name>
+								</program>
+							</programs>
+							<repositoryLayout>flat</repositoryLayout>
+							<repositoryName>lib</repositoryName>
+						</configuration>
+						<phase>package</phase>
+						<goals>
+							<goal>assemble</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+			<plugin>
+				<artifactId>maven-assembly-plugin</artifactId>
+				<version>2.2-beta-5</version>
+				<executions>
+					<execution>
+						<configuration>
+							<descriptors>
+								<descriptor>src/main/assembly/binary-assembly.xml</descriptor>
+							</descriptors>
+						</configuration>
+						<phase>package</phase>
+						<goals>
+							<goal>attached</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-surefire-plugin</artifactId>
+				<version>2.13</version>
+				<configuration>
+					<forkMode>pertest</forkMode>
+					<argLine>-enableassertions -Xmx2047m -Dfile.encoding=UTF-8
+						-Djava.util.logging.config.file=src/test/resources/logging.properties</argLine>
+					<includes>
+						<include>**/test/optimizer/*TestSuite.java</include>
+						<include>**/test/optimizer/*Test.java</include>
+						<include>**/test/runtimefunction/*TestSuite.java</include>
+						<include>**/test/runtimefunction/*Test.java</include>
+					</includes>
+				</configuration>
+			</plugin>
+			<plugin>
+				<artifactId>maven-resources-plugin</artifactId>
+				<version>2.5</version>
+				<executions>
+					<execution>
+						<id>copy-scripts</id>
+						<!-- here the phase you need -->
+						<phase>package</phase>
+						<goals>
+							<goal>copy-resources</goal>
+						</goals>
+						<configuration>
+							<outputDirectory>target/appassembler/bin</outputDirectory>
+							<resources>
+								<resource>
+									<directory>src/main/resources/scripts</directory>
+								</resource>
+							</resources>
+						</configuration>
+					</execution>
+					<execution>
+						<id>copy-conf</id>
+						<!-- here the phase you need -->
+						<phase>package</phase>
+						<goals>
+							<goal>copy-resources</goal>
+						</goals>
+						<configuration>
+							<outputDirectory>target/appassembler/conf</outputDirectory>
+							<resources>
+								<resource>
+									<directory>src/main/resources/conf</directory>
+								</resource>
+							</resources>
+						</configuration>
+					</execution>
+					<execution>
+						<id>copy-jar</id>
+						<!-- here the phase you need -->
+						<phase>package</phase>
+						<goals>
+							<goal>copy-resources</goal>
+						</goals>
+						<configuration>
+							<outputDirectory>target/appassembler/lib</outputDirectory>
+							<resources>
+								<resource>
+									<directory>target</directory>
+									<includes>
+										<include>*patch.jar</include>
+									</includes>
+								</resource>
+							</resources>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+			<plugin>
+				<artifactId>maven-clean-plugin</artifactId>
+				<version>2.5</version>
+				<configuration>
+					<filesets>
+						<fileset>
+							<directory>.</directory>
+							<includes>
+								<include>metastore*</include>
+								<include>hadoop*</include>
+								<include>edu*</include>
+								<include>tmp*</include>
+								<include>build*</include>
+								<include>target*</include>
+								<include>log*</include>
+								<include>derby.log</include>
+								<include>ClusterController*</include>
+							</includes>
+						</fileset>
+					</filesets>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+	<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>third-party</id>
+			<url>http://obelix.ics.uci.edu/nexus/content/repositories/third-party</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>hyracks-public-release</id>
+			<url>http://obelix.ics.uci.edu/nexus/content/repositories/hyracks-public-releases</url>
+		</repository>
+	</repositories>
+</project>
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 e6f47cf..379737f 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
@@ -1,12 +1,12 @@
 package edu.uci.ics.hivesterix.runtime.exec;
 
 import java.io.BufferedReader;
-import java.io.DataInputStream;
 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;
@@ -80,6 +80,7 @@
 
     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>>>();
@@ -151,6 +152,11 @@
      */
     private Properties clusterProps;
 
+    /**
+     * the Hyracks client connection
+     */
+    private IHyracksClientConnection hcc;
+
     public HyracksExecutionEngine(HiveConf conf) {
         this.conf = conf;
         init(conf);
@@ -533,15 +539,26 @@
             confIn.close();
         }
 
-        Process process = Runtime.getRuntime().exec("src/main/resources/scripts/getip.sh");
-        BufferedReader ipReader = new BufferedReader(new InputStreamReader(
-                new DataInputStream(process.getInputStream())));
-        String ipAddress = ipReader.readLine();
-        ipReader.close();
-        int port = Integer.parseInt(clusterProps.getProperty("CC_CLIENTPORT"));
-        String applicationName = "hivesterix";
+        if (hcc == null) {
+            BufferedReader ipReader = new BufferedReader(new InputStreamReader(new FileInputStream(masterFilePath)));
+            String masterNode = ipReader.readLine();
+            ipReader.close();
 
-        IHyracksClientConnection hcc = new HyracksConnection(ipAddress, port);
+            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;
+                    }
+                }
+            }
+        }
+
+        String applicationName = "hivesterix";
         long start = System.currentTimeMillis();
         JobId jobId = hcc.startJob(applicationName, job);
         hcc.waitForCompletion(jobId);
diff --git a/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/serde2/lazy/objectinspector/LazyObjectInspectorFactory.java b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/serde2/lazy/objectinspector/LazyObjectInspectorFactory.java
new file mode 100644
index 0000000..7920001
--- /dev/null
+++ b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/serde2/lazy/objectinspector/LazyObjectInspectorFactory.java
@@ -0,0 +1,123 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.hive.serde2.lazy.objectinspector;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.io.Text;
+
+/**
+ * ObjectInspectorFactory is the primary way to create new ObjectInspector
+ * instances.
+ * SerDe classes should call the static functions in this library to create an
+ * ObjectInspector to return to the caller of SerDe2.getObjectInspector().
+ * The reason of having caches here is that ObjectInspectors do not have an
+ * internal state - so ObjectInspectors with the same construction parameters
+ * should result in exactly the same ObjectInspector.
+ */
+public final class LazyObjectInspectorFactory {
+
+    static ConcurrentHashMap<ArrayList<Object>, LazySimpleStructObjectInspector> cachedLazySimpleStructObjectInspector = new ConcurrentHashMap<ArrayList<Object>, LazySimpleStructObjectInspector>();
+
+    public static LazySimpleStructObjectInspector getLazySimpleStructObjectInspector(List<String> structFieldNames,
+            List<ObjectInspector> structFieldObjectInspectors, byte separator, Text nullSequence,
+            boolean lastColumnTakesRest, boolean escaped, byte escapeChar) {
+        ArrayList<Object> signature = new ArrayList<Object>();
+        signature.add(structFieldNames);
+        signature.add(structFieldObjectInspectors);
+        signature.add(Byte.valueOf(separator));
+        signature.add(nullSequence.toString());
+        signature.add(Boolean.valueOf(lastColumnTakesRest));
+        signature.add(Boolean.valueOf(escaped));
+        signature.add(Byte.valueOf(escapeChar));
+        LazySimpleStructObjectInspector result = cachedLazySimpleStructObjectInspector.get(signature);
+        if (result == null) {
+            result = new LazySimpleStructObjectInspector(structFieldNames, structFieldObjectInspectors, separator,
+                    nullSequence, lastColumnTakesRest, escaped, escapeChar);
+            cachedLazySimpleStructObjectInspector.put(signature, result);
+        }
+        return result;
+    }
+
+    static ConcurrentHashMap<ArrayList<Object>, LazyListObjectInspector> cachedLazySimpleListObjectInspector = new ConcurrentHashMap<ArrayList<Object>, LazyListObjectInspector>();
+
+    public static LazyListObjectInspector getLazySimpleListObjectInspector(ObjectInspector listElementObjectInspector,
+            byte separator, Text nullSequence, boolean escaped, byte escapeChar) {
+        ArrayList<Object> signature = new ArrayList<Object>();
+        signature.add(listElementObjectInspector);
+        signature.add(Byte.valueOf(separator));
+        signature.add(nullSequence.toString());
+        signature.add(Boolean.valueOf(escaped));
+        signature.add(Byte.valueOf(escapeChar));
+        LazyListObjectInspector result = cachedLazySimpleListObjectInspector.get(signature);
+        if (result == null) {
+            result = new LazyListObjectInspector(listElementObjectInspector, separator, nullSequence, escaped,
+                    escapeChar);
+            cachedLazySimpleListObjectInspector.put(signature, result);
+        }
+        return result;
+    }
+
+    static ConcurrentHashMap<ArrayList<Object>, LazyMapObjectInspector> cachedLazySimpleMapObjectInspector = new ConcurrentHashMap<ArrayList<Object>, LazyMapObjectInspector>();
+
+    public static LazyMapObjectInspector getLazySimpleMapObjectInspector(ObjectInspector mapKeyObjectInspector,
+            ObjectInspector mapValueObjectInspector, byte itemSeparator, byte keyValueSeparator, Text nullSequence,
+            boolean escaped, byte escapeChar) {
+        ArrayList<Object> signature = new ArrayList<Object>();
+        signature.add(mapKeyObjectInspector);
+        signature.add(mapValueObjectInspector);
+        signature.add(Byte.valueOf(itemSeparator));
+        signature.add(Byte.valueOf(keyValueSeparator));
+        signature.add(nullSequence.toString());
+        signature.add(Boolean.valueOf(escaped));
+        signature.add(Byte.valueOf(escapeChar));
+        LazyMapObjectInspector result = cachedLazySimpleMapObjectInspector.get(signature);
+        if (result == null) {
+            result = new LazyMapObjectInspector(mapKeyObjectInspector, mapValueObjectInspector, itemSeparator,
+                    keyValueSeparator, nullSequence, escaped, escapeChar);
+            cachedLazySimpleMapObjectInspector.put(signature, result);
+        }
+        return result;
+    }
+
+    static ConcurrentHashMap<List<Object>, LazyUnionObjectInspector> cachedLazyUnionObjectInspector = new ConcurrentHashMap<List<Object>, LazyUnionObjectInspector>();
+
+    public static LazyUnionObjectInspector getLazyUnionObjectInspector(List<ObjectInspector> ois, byte separator,
+            Text nullSequence, boolean escaped, byte escapeChar) {
+        List<Object> signature = new ArrayList<Object>();
+        signature.add(ois);
+        signature.add(Byte.valueOf(separator));
+        signature.add(nullSequence.toString());
+        signature.add(Boolean.valueOf(escaped));
+        signature.add(Byte.valueOf(escapeChar));
+        LazyUnionObjectInspector result = cachedLazyUnionObjectInspector.get(signature);
+        if (result == null) {
+            result = new LazyUnionObjectInspector(ois, separator, nullSequence, escaped, escapeChar);
+            cachedLazyUnionObjectInspector.put(signature, result);
+        }
+        return result;
+    }
+
+    private LazyObjectInspectorFactory() {
+        // prevent instantiation
+    }
+}
\ No newline at end of file
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
new file mode 100644
index 0000000..95b999e
--- /dev/null
+++ b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/serde2/typeinfo/TypeInfoFactory.java
@@ -0,0 +1,128 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.hive.serde2.typeinfo;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.apache.hadoop.hive.serde.Constants;
+import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorUtils;
+
+/**
+ * TypeInfoFactory can be used to create the TypeInfo object for any types.
+ * TypeInfo objects are all read-only so we can reuse them easily.
+ * TypeInfoFactory has internal cache to make sure we don't create 2 TypeInfo
+ * objects that represents the same type.
+ */
+public final class TypeInfoFactory {
+
+    static ConcurrentHashMap<String, TypeInfo> cachedPrimitiveTypeInfo = new ConcurrentHashMap<String, TypeInfo>();
+
+    private TypeInfoFactory() {
+        // prevent instantiation
+    }
+
+    public static TypeInfo getPrimitiveTypeInfo(String typeName) {
+        if (null == PrimitiveObjectInspectorUtils.getTypeEntryFromTypeName(typeName)) {
+            throw new RuntimeException("Cannot getPrimitiveTypeInfo for " + typeName);
+        }
+        TypeInfo result = cachedPrimitiveTypeInfo.get(typeName);
+        if (result == null) {
+            result = new PrimitiveTypeInfo(typeName);
+            cachedPrimitiveTypeInfo.put(typeName, result);
+        }
+        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 unknownTypeInfo = getPrimitiveTypeInfo("unknown");
+
+    public static TypeInfo getPrimitiveTypeInfoFromPrimitiveWritable(Class<?> clazz) {
+        String typeName = PrimitiveObjectInspectorUtils.getTypeNameFromPrimitiveWritable(clazz);
+        if (typeName == null) {
+            throw new RuntimeException("Internal error: Cannot get typeName for " + clazz);
+        }
+        return getPrimitiveTypeInfo(typeName);
+    }
+
+    public static TypeInfo getPrimitiveTypeInfoFromJavaPrimitive(Class<?> clazz) {
+        return getPrimitiveTypeInfo(PrimitiveObjectInspectorUtils.getTypeNameFromPrimitiveJava(clazz));
+    }
+
+    static ConcurrentHashMap<ArrayList<List<?>>, TypeInfo> cachedStructTypeInfo = new ConcurrentHashMap<ArrayList<List<?>>, TypeInfo>();
+
+    public static TypeInfo getStructTypeInfo(List<String> names, List<TypeInfo> typeInfos) {
+        ArrayList<List<?>> signature = new ArrayList<List<?>>(2);
+        signature.add(names);
+        signature.add(typeInfos);
+        TypeInfo result = cachedStructTypeInfo.get(signature);
+        if (result == null) {
+            result = new StructTypeInfo(names, typeInfos);
+            cachedStructTypeInfo.put(signature, result);
+        }
+        return result;
+    }
+
+    static ConcurrentHashMap<List<?>, TypeInfo> cachedUnionTypeInfo = new ConcurrentHashMap<List<?>, TypeInfo>();
+
+    public static TypeInfo getUnionTypeInfo(List<TypeInfo> typeInfos) {
+        TypeInfo result = cachedUnionTypeInfo.get(typeInfos);
+        if (result == null) {
+            result = new UnionTypeInfo(typeInfos);
+            cachedUnionTypeInfo.put(typeInfos, result);
+        }
+        return result;
+    }
+
+    static ConcurrentHashMap<TypeInfo, TypeInfo> cachedListTypeInfo = new ConcurrentHashMap<TypeInfo, TypeInfo>();
+
+    public static TypeInfo getListTypeInfo(TypeInfo elementTypeInfo) {
+        TypeInfo result = cachedListTypeInfo.get(elementTypeInfo);
+        if (result == null) {
+            result = new ListTypeInfo(elementTypeInfo);
+            cachedListTypeInfo.put(elementTypeInfo, result);
+        }
+        return result;
+    }
+
+    static ConcurrentHashMap<ArrayList<TypeInfo>, TypeInfo> cachedMapTypeInfo = new ConcurrentHashMap<ArrayList<TypeInfo>, TypeInfo>();
+
+    public static TypeInfo getMapTypeInfo(TypeInfo keyTypeInfo, TypeInfo valueTypeInfo) {
+        ArrayList<TypeInfo> signature = new ArrayList<TypeInfo>(2);
+        signature.add(keyTypeInfo);
+        signature.add(valueTypeInfo);
+        TypeInfo result = cachedMapTypeInfo.get(signature);
+        if (result == null) {
+            result = new MapTypeInfo(keyTypeInfo, valueTypeInfo);
+            cachedMapTypeInfo.put(signature, result);
+        }
+        return result;
+    };
+
+}
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/main/resources/conf/topology-template.xml b/hivesterix/hivesterix-dist/src/main/resources/conf/topology-template.xml
new file mode 100755
index 0000000..4710706
--- /dev/null
+++ b/hivesterix/hivesterix-dist/src/main/resources/conf/topology-template.xml
@@ -0,0 +1,7 @@
+<cluster-topology>
+    <network-switch name="Global">
+        <network-switch name="local">
+            <terminal name="127.0.0.1"/>
+        </network-switch>
+    </network-switch>
+</cluster-topology>
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/main/resources/scripts/getip.sh b/hivesterix/hivesterix-dist/src/main/resources/scripts/getip.sh
index e0cdf73..8c9ae76 100755
--- a/hivesterix/hivesterix-dist/src/main/resources/scripts/getip.sh
+++ b/hivesterix/hivesterix-dist/src/main/resources/scripts/getip.sh
@@ -8,6 +8,10 @@
         IPADDR=`/sbin/ifconfig eth0 | grep "inet " | awk '{print $2}' | cut -f 2 -d ':'`
 	if [ "$IPADDR" = "" ]
         then
+                IPADDR=`/sbin/ifconfig em1 | 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 
 else
diff --git a/hivesterix/hivesterix-dist/src/main/resources/scripts/startcc.sh b/hivesterix/hivesterix-dist/src/main/resources/scripts/startcc.sh
index fe2551d..484ecac 100644
--- a/hivesterix/hivesterix-dist/src/main/resources/scripts/startcc.sh
+++ b/hivesterix/hivesterix-dist/src/main/resources/scripts/startcc.sh
@@ -22,4 +22,10 @@
 
 #Launch hyracks cc script
 chmod -R 755 $HYRACKS_HOME
-$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyrackscc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 3 &> $CCLOGS_DIR/cc.log &
+if [ -f "conf/topology.xml"  ]; then
+#Launch hyracks cc script with topology
+$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyrackscc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 0 -cluster-topology "conf/topology.xml" &> $CCLOGS_DIR/cc.log &
+else
+#Launch hyracks cc script without toplogy
+$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyrackscc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 0 &> $CCLOGS_DIR/cc.log &
+fi
diff --git a/hivesterix/hivesterix-dist/src/main/resources/scripts/startnc.sh b/hivesterix/hivesterix-dist/src/main/resources/scripts/startnc.sh
index 6e0f90e..23a4c36 100644
--- a/hivesterix/hivesterix-dist/src/main/resources/scripts/startnc.sh
+++ b/hivesterix/hivesterix-dist/src/main/resources/scripts/startnc.sh
@@ -46,4 +46,4 @@
 cd $NCTMP_DIR
 
 #Launch hyracks nc
-$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyracksnc -cc-host $CCHOST -cc-port $CC_CLUSTERPORT -cluster-net-ip-address $IPADDR  -data-ip-address $IPADDR -node-id $NODEID -iodevices "${IO_DIRS}" &> $NCLOGS_DIR/$NODEID.log &
+$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyracksnc -cc-host $CCHOST -cc-port $CC_CLUSTERPORT -cluster-net-ip-address $IPADDR  -data-ip-address $IPADDR -result-ip-address $IPADDR -node-id $NODEID -iodevices "${IO_DIRS}" &> $NCLOGS_DIR/$NODEID.log &
diff --git a/hivesterix/hivesterix-dist/src/main/resources/scripts/stopnc.sh b/hivesterix/hivesterix-dist/src/main/resources/scripts/stopnc.sh
index 03ce4e7..35c4794 100644
--- a/hivesterix/hivesterix-dist/src/main/resources/scripts/stopnc.sh
+++ b/hivesterix/hivesterix-dist/src/main/resources/scripts/stopnc.sh
@@ -5,6 +5,10 @@
 PID=`ps -ef|grep ${USER}|grep java|grep 'Dapp.name=hyracksnc'|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=hyracksnc'|awk '{print $2}'`
 fi
diff --git a/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/perf/base/AbstractPerfTestSuiteClass.java b/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/perf/base/AbstractPerfTestSuiteClass.java
index d9492d9..c882742 100644
--- a/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/perf/base/AbstractPerfTestSuiteClass.java
+++ b/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/perf/base/AbstractPerfTestSuiteClass.java
@@ -113,6 +113,7 @@
             ncConfig.clusterNetIPAddress = ipAddress;
             ncConfig.ccPort = clientPort;
             ncConfig.dataIPAddress = "127.0.0.1";
+            ncConfig.datasetIPAddress = "127.0.0.1";
             ncConfig.nodeId = "nc" + i;
             NodeControllerService nc = new NodeControllerService(ncConfig);
             nc.start();
diff --git a/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/base/AbstractTestSuiteClass.java b/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/base/AbstractTestSuiteClass.java
index e455527..09b632a 100644
--- a/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/base/AbstractTestSuiteClass.java
+++ b/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/base/AbstractTestSuiteClass.java
@@ -1,7 +1,6 @@
 package edu.uci.ics.hivesterix.test.base;
 
 import java.io.BufferedReader;
-import java.io.DataInputStream;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
@@ -9,6 +8,7 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.net.InetAddress;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
@@ -25,7 +25,6 @@
 import org.apache.hadoop.hive.conf.HiveConf;
 import org.apache.hadoop.hive.ql.session.SessionState;
 import org.apache.hadoop.mapred.JobConf;
-import org.apache.hadoop.mapred.MiniMRCluster;
 
 import edu.uci.ics.hivesterix.common.config.ConfUtil;
 import edu.uci.ics.hyracks.api.client.HyracksConnection;
@@ -45,10 +44,10 @@
     private static final String PATH_TO_DATA = "src/test/resources/runtimefunctionts/data/";
 
     private static final String clusterPropertiesPath = "conf/cluster.properties";
-    private Properties clusterProps;
+    private static final String masterFilePath = "conf/master";
 
+    private Properties clusterProps;
     private MiniDFSCluster dfsCluster;
-    private MiniMRCluster mrCluster;
 
     private JobConf conf = new JobConf();
     protected FileSystem dfs;
@@ -81,10 +80,6 @@
         System.setProperty("hadoop.log.dir", "logs");
         dfsCluster = new MiniDFSCluster(hconf, numberOfNC, true, null);
         dfs = dfsCluster.getFileSystem();
-
-        mrCluster = new MiniMRCluster(2, dfs.getUri().toString(), 1);
-        hconf.setVar(HiveConf.ConfVars.HADOOPJT, "localhost:" + mrCluster.getJobTrackerPort());
-
         conf = new JobConf(hconf);
         ConfUtil.setJobConf(conf);
 
@@ -109,11 +104,16 @@
             clusterProps.load(confIn);
             confIn.close();
         }
-        Process process = Runtime.getRuntime().exec("src/main/resources/scripts/getip.sh");
-        BufferedReader ipReader = new BufferedReader(new InputStreamReader(
-                new DataInputStream(process.getInputStream())));
-        String ipAddress = ipReader.readLine();
+        BufferedReader ipReader = new BufferedReader(new InputStreamReader(new FileInputStream(masterFilePath)));
+        String masterNode = ipReader.readLine();
         ipReader.close();
+        InetAddress[] ips = InetAddress.getAllByName(masterNode);
+        String ipAddress = null;
+        for (InetAddress ip : ips) {
+            if (ip.getAddress().length <= 4) {
+                ipAddress = ip.getHostAddress();
+            }
+        }
         int clientPort = Integer.parseInt(clusterProps.getProperty("CC_CLIENTPORT"));
         int netPort = Integer.parseInt(clusterProps.getProperty("CC_CLUSTERPORT"));
         String applicationName = "hivesterix";
@@ -137,6 +137,7 @@
             ncConfig.clusterNetIPAddress = ipAddress;
             ncConfig.ccPort = netPort;
             ncConfig.dataIPAddress = "127.0.0.1";
+            ncConfig.datasetIPAddress = "127.0.0.1";
             ncConfig.nodeId = "nc" + i;
             NodeControllerService nc = new NodeControllerService(ncConfig);
             nc.start();
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/hive/conf/topology.xml b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/hive/conf/topology.xml
index 4aac091..4710706 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/hive/conf/topology.xml
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/hive/conf/topology.xml
@@ -1,12 +1,7 @@
 <cluster-topology>
-    <network-switch name="switch1">
-        <network-switch name="switch2">
-            <terminal name="nc0"/>
-            <terminal name="nc3"/>
-        </network-switch>
-        <network-switch name="switch3">
-            <terminal name="nc1"/>
-            <terminal name="nc4"/>
+    <network-switch name="Global">
+        <network-switch name="local">
+            <terminal name="127.0.0.1"/>
         </network-switch>
     </network-switch>
 </cluster-topology>
\ No newline at end of file
diff --git a/hivesterix/hivesterix-optimizer/pom.xml b/hivesterix/hivesterix-optimizer/pom.xml
index 4e6032e..84c299f 100644
--- a/hivesterix/hivesterix-optimizer/pom.xml
+++ b/hivesterix/hivesterix-optimizer/pom.xml
@@ -1,12 +1,10 @@
 <?xml version="1.0"?>
-<project
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
-	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<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>
 		<artifactId>hivesterix</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 	<artifactId>hivesterix-optimizer</artifactId>
@@ -32,14 +30,14 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-common</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-translator</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hivesterix/hivesterix-runtime/pom.xml b/hivesterix/hivesterix-runtime/pom.xml
index 77db0d4..9c66cf4 100644
--- a/hivesterix/hivesterix-runtime/pom.xml
+++ b/hivesterix/hivesterix-runtime/pom.xml
@@ -1,13 +1,18 @@
-<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">
+<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>0.2.3-SNAPSHOT</version>
+	<version>0.2.4-SNAPSHOT</version>
 	<name>hivesterix-runtime</name>
 
+	<parent>
+                <groupId>edu.uci.ics.hyracks</groupId>
+                <artifactId>hivesterix</artifactId>
+                <version>0.2.4-SNAPSHOT</version>
+        </parent>
+
 	<dependencies>
-		<dependency>
+        <dependency>
 			<groupId>javax.servlet</groupId>
 			<artifactId>servlet-api</artifactId>
 			<version>2.5</version>
@@ -49,11 +54,6 @@
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop</groupId>
-			<artifactId>hadoop-core</artifactId>
-			<version>0.20.2</version>
-		</dependency>
-		<dependency>
 			<groupId>jline</groupId>
 			<artifactId>jline</artifactId>
 			<version>0.9.94</version>
@@ -238,13 +238,6 @@
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop</groupId>
-			<artifactId>hadoop-test</artifactId>
-			<version>0.20.2</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
 			<groupId>commons-logging</groupId>
 			<artifactId>commons-logging</artifactId>
 			<version>1.1.1</version>
@@ -283,35 +276,35 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-serde</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-common</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/jobgen/HiveMetaDataProvider.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/jobgen/HiveMetaDataProvider.java
index 13526d8..daf6a7f 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/jobgen/HiveMetaDataProvider.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/jobgen/HiveMetaDataProvider.java
@@ -95,6 +95,13 @@
     }
 
     @Override
+    public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getResultHandleRuntime(IDataSink sink,
+            int[] printColumns, IPrinterFactory[] printerFactories, RecordDescriptor inputDesc, boolean ordered,
+            JobSpecification spec) throws AlgebricksException {
+        return null;
+    }
+
+    @Override
     public Pair<IOperatorDescriptor, AlgebricksPartitionConstraint> getWriteResultRuntime(IDataSource<S> arg0,
             IOperatorSchema arg1, List<LogicalVariable> arg2, LogicalVariable arg3, JobGenContext arg4,
             JobSpecification arg5) throws AlgebricksException {
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/jobgen/HiveScanRuntimeGenerator.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/jobgen/HiveScanRuntimeGenerator.java
index 0d2c78a..5e4e21e 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/jobgen/HiveScanRuntimeGenerator.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/jobgen/HiveScanRuntimeGenerator.java
@@ -25,6 +25,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.api.topology.ClusterTopology;
 import edu.uci.ics.hyracks.hdfs.dataflow.HDFSReadOperatorDescriptor;
 import edu.uci.ics.hyracks.hdfs.scheduler.Scheduler;
 
@@ -86,7 +87,8 @@
             JobConf conf = ConfUtil.getJobConf(fileDesc.getInputFileFormatClass(), filePath);
             String[] locConstraints = ConfUtil.getNCs();
             Map<String, NodeControllerInfo> ncNameToNcInfos = ConfUtil.getNodeControllerInfo();
-            Scheduler scheduler = new Scheduler(ncNameToNcInfos);
+            ClusterTopology topology = ConfUtil.getClusterTopology();
+            Scheduler scheduler = new Scheduler(ncNameToNcInfos, topology);
             InputSplit[] splits = conf.getInputFormat().getSplits(conf, locConstraints.length);
             String[] schedule = scheduler.getLocationConstraints(splits);
             IOperatorDescriptor scanner = new HDFSReadOperatorDescriptor(jobSpec, recDescriptor, conf, splits,
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 3a62b2e..81faf38 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
@@ -24,124 +24,130 @@
 @SuppressWarnings("deprecation")
 public class HiveFileWritePushRuntime implements IPushRuntime {
 
-    /**
-     * frame tuple accessor to access byte buffer
-     */
-    private final FrameTupleAccessor accessor;
+	/**
+	 * frame tuple accessor to access byte buffer
+	 */
+	private final FrameTupleAccessor accessor;
 
-    /**
-     * input object inspector
-     */
-    private final ObjectInspector inputInspector;
+	/**
+	 * input object inspector
+	 */
+	private final ObjectInspector inputInspector;
 
-    /**
-     * cachedInput
-     */
-    private final LazyColumnar cachedInput;
+	/**
+	 * cachedInput
+	 */
+	private final LazyColumnar cachedInput;
 
-    /**
-     * File sink operator of Hive
-     */
-    private final FileSinkDesc fileSink;
+	/**
+	 * File sink operator of Hive
+	 */
+	private final FileSinkDesc fileSink;
 
-    /**
-     * job configuration, which contain name node and other configuration
-     * information
-     */
-    private JobConf conf;
+	/**
+	 * job configuration, which contain name node and other configuration
+	 * information
+	 */
+	private JobConf conf;
 
-    /**
-     * input object inspector
-     */
-    private final Schema inputSchema;
+	/**
+	 * input object inspector
+	 */
+	private final Schema inputSchema;
 
-    /**
-     * a copy of hive schema representation
-     */
-    private RowSchema rowSchema;
+	/**
+	 * a copy of hive schema representation
+	 */
+	private RowSchema rowSchema;
 
-    /**
-     * the Hive file sink operator
-     */
-    private FileSinkOperator fsOp;
+	/**
+	 * the Hive file sink operator
+	 */
+	private FileSinkOperator fsOp;
 
-    /**
-     * cached tuple object reference
-     */
-    private FrameTupleReference tuple = new FrameTupleReference();
+	/**
+	 * 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);
+	/**
+	 * @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;
+		rowSchema = schema;
+		conf = job;
+		inputSchema = oi;
 
-        accessor = new FrameTupleAccessor(context.getFrameSize(), inputRecordDesc);
-        inputInspector = inputSchema.toObjectInspector();
-        cachedInput = new LazyColumnar((LazyColumnarObjectInspector) inputInspector);
-    }
+		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());
+	@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();
-        }
-    }
+		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 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 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 setFrameWriter(int index, IFrameWriter writer,
+			RecordDescriptor recordDesc) {
+		throw new IllegalStateException();
+	}
 
-    @Override
-    public void setInputRecordDescriptor(int index, RecordDescriptor recordDescriptor) {
-    }
+	@Override
+	public void setInputRecordDescriptor(int index,
+			RecordDescriptor recordDescriptor) {
+	}
 
-    @Override
-    public void fail() throws HyracksDataException {
+	@Override
+	public void fail() throws HyracksDataException {
 
-    }
+	}
 
 }
diff --git a/hivesterix/hivesterix-serde/pom.xml b/hivesterix/hivesterix-serde/pom.xml
index 0ba73bd..b5e8fe1 100644
--- a/hivesterix/hivesterix-serde/pom.xml
+++ b/hivesterix/hivesterix-serde/pom.xml
@@ -1,12 +1,10 @@
 <?xml version="1.0"?>
-<project
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
-	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<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>
 		<artifactId>hivesterix</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 	<artifactId>hivesterix-serde</artifactId>
@@ -46,17 +44,17 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</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>
+                        <groupId>edu.uci.ics.hyracks</groupId>
+                        <artifactId>hivesterix-common</artifactId>
+                        <version>0.2.4-SNAPSHOT</version>
+                        <type>jar</type>
+                        <scope>compile</scope>
+                </dependency>
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
diff --git a/hivesterix/hivesterix-translator/pom.xml b/hivesterix/hivesterix-translator/pom.xml
index b99d652..2a93722 100644
--- a/hivesterix/hivesterix-translator/pom.xml
+++ b/hivesterix/hivesterix-translator/pom.xml
@@ -1,7 +1,5 @@
 <?xml version="1.0"?>
-<project
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
-	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<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-translator</artifactId>
 	<name>hivesterix-translator</name>
@@ -9,7 +7,7 @@
 	<parent>
 		<artifactId>hivesterix</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -39,21 +37,21 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-common</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-runtime</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hivesterix/pom.xml b/hivesterix/pom.xml
index a8ef4ee..00d008a 100644
--- a/hivesterix/pom.xml
+++ b/hivesterix/pom.xml
@@ -1,10 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<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">
+<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</artifactId>
-	<version>0.2.3-SNAPSHOT</version>
+	<version>0.2.4-SNAPSHOT</version>
 	<packaging>pom</packaging>
 	<name>hivesterix</name>
 
diff --git a/hyracks/hyracks-api/pom.xml b/hyracks/hyracks-api/pom.xml
index 6807f76..091767b 100644
--- a/hyracks/hyracks-api/pom.xml
+++ b/hyracks/hyracks-api/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -47,7 +47,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-ipc</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   	</dependency>
   	<dependency>
   		<groupId>org.apache.commons</groupId>
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/channels/IInputChannel.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/channels/IInputChannel.java
index a8f2fda..a4f0b29 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/channels/IInputChannel.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/channels/IInputChannel.java
@@ -16,7 +16,7 @@
 
 import java.nio.ByteBuffer;
 
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 
 public interface IInputChannel {
@@ -30,7 +30,7 @@
 
     public void recycleBuffer(ByteBuffer buffer);
 
-    public void open(IHyracksTaskContext ctx) throws HyracksDataException;
+    public void open(IHyracksCommonContext ctx) throws HyracksDataException;
 
     public void close() throws HyracksDataException;
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceFunctions.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceFunctions.java
index e34e60d..cd2b698 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceFunctions.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceFunctions.java
@@ -17,6 +17,8 @@
 import java.io.Serializable;
 import java.util.EnumSet;
 
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
 
@@ -30,6 +32,10 @@
         CREATE_JOB,
         GET_JOB_STATUS,
         START_JOB,
+        GET_DATASET_DIRECTORY_SERIVICE_INFO,
+        GET_DATASET_RESULT_STATUS,
+        GET_DATASET_RECORD_DESCRIPTOR,
+        GET_DATASET_RESULT_LOCATIONS,
         WAIT_FOR_COMPLETION,
         GET_NODE_CONTROLLERS_INFO
     }
@@ -156,6 +162,74 @@
         }
     }
 
+    public static class GetDatasetDirectoryServiceInfoFunction extends Function {
+        private static final long serialVersionUID = 1L;
+
+        @Override
+        public FunctionId getFunctionId() {
+            return FunctionId.GET_DATASET_DIRECTORY_SERIVICE_INFO;
+        }
+    }
+
+    public static class GetDatasetResultStatusFunction extends Function {
+        private static final long serialVersionUID = 1L;
+
+        private final JobId jobId;
+
+        private final ResultSetId rsId;
+
+        public GetDatasetResultStatusFunction(JobId jobId, ResultSetId rsId) {
+            this.jobId = jobId;
+            this.rsId = rsId;
+        }
+
+        @Override
+        public FunctionId getFunctionId() {
+            return FunctionId.GET_DATASET_RESULT_STATUS;
+        }
+
+        public JobId getJobId() {
+            return jobId;
+        }
+
+        public ResultSetId getResultSetId() {
+            return rsId;
+        }
+    }
+
+    public static class GetDatasetResultLocationsFunction extends Function {
+        private static final long serialVersionUID = 1L;
+
+        private final JobId jobId;
+
+        private final ResultSetId rsId;
+
+        private final DatasetDirectoryRecord[] knownRecords;
+
+        public GetDatasetResultLocationsFunction(JobId jobId, ResultSetId rsId, DatasetDirectoryRecord[] knownRecords) {
+            this.jobId = jobId;
+            this.rsId = rsId;
+            this.knownRecords = knownRecords;
+        }
+
+        @Override
+        public FunctionId getFunctionId() {
+            return FunctionId.GET_DATASET_RESULT_LOCATIONS;
+        }
+
+        public JobId getJobId() {
+            return jobId;
+        }
+
+        public ResultSetId getResultSetId() {
+            return rsId;
+        }
+
+        public DatasetDirectoryRecord[] getKnownRecords() {
+            return knownRecords;
+        }
+    }
+
     public static class WaitForCompletionFunction extends Function {
         private static final long serialVersionUID = 1L;
 
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceRemoteProxy.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceRemoteProxy.java
index 4c06d42..2ab42c0 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceRemoteProxy.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksClientInterfaceRemoteProxy.java
@@ -17,6 +17,7 @@
 import java.util.EnumSet;
 import java.util.Map;
 
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.job.JobStatus;
@@ -76,6 +77,12 @@
     }
 
     @Override
+    public NetworkAddress getDatasetDirectoryServiceInfo() throws Exception {
+        HyracksClientInterfaceFunctions.GetDatasetDirectoryServiceInfoFunction gddsf = new HyracksClientInterfaceFunctions.GetDatasetDirectoryServiceInfoFunction();
+        return (NetworkAddress) rpci.call(ipcHandle, gddsf);
+    }
+
+    @Override
     public void waitForCompletion(JobId jobId) throws Exception {
         HyracksClientInterfaceFunctions.WaitForCompletionFunction wfcf = new HyracksClientInterfaceFunctions.WaitForCompletionFunction(
                 jobId);
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksConnection.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksConnection.java
index 227524c..e0fafb0 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksConnection.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/HyracksConnection.java
@@ -26,6 +26,7 @@
 import org.apache.http.impl.client.DefaultHttpClient;
 
 import edu.uci.ics.hyracks.api.client.impl.JobSpecificationActivityClusterGraphGeneratorFactory;
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.api.job.IActivityClusterGraphGeneratorFactory;
 import edu.uci.ics.hyracks.api.job.JobFlag;
@@ -118,6 +119,10 @@
         return hci.startJob(appName, JavaSerializationUtils.serialize(acggf), jobFlags);
     }
 
+    public NetworkAddress getDatasetDirectoryServiceInfo() throws Exception {
+        return hci.getDatasetDirectoryServiceInfo();
+    }
+
     @Override
     public void waitForCompletion(JobId jobId) throws Exception {
         hci.waitForCompletion(jobId);
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientConnection.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientConnection.java
index bdbb544..6333c22 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientConnection.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientConnection.java
@@ -18,6 +18,7 @@
 import java.util.EnumSet;
 import java.util.Map;
 
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
 import edu.uci.ics.hyracks.api.job.IActivityClusterGraphGeneratorFactory;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
@@ -100,6 +101,14 @@
             throws Exception;
 
     /**
+     * Gets the IP Address and port for the DatasetDirectoryService wrapped in NetworkAddress
+     * 
+     * @return {@link NetworkAddress}
+     * @throws Exception
+     */
+    public NetworkAddress getDatasetDirectoryServiceInfo() throws Exception;
+
+    /**
      * Waits until the specified job has completed, either successfully or has
      * encountered a permanent failure.
      * 
@@ -123,4 +132,4 @@
      * @throws Exception
      */
     public ClusterTopology getClusterTopology() throws Exception;
-}
\ No newline at end of file
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientInterface.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientInterface.java
index ef5906e..22b0a8f 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientInterface.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/IHyracksClientInterface.java
@@ -17,6 +17,7 @@
 import java.util.EnumSet;
 import java.util.Map;
 
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.job.JobStatus;
@@ -35,6 +36,8 @@
 
     public JobId startJob(String appName, byte[] acggfBytes, EnumSet<JobFlag> jobFlags) throws Exception;
 
+    public NetworkAddress getDatasetDirectoryServiceInfo() throws Exception;
+
     public void waitForCompletion(JobId jobId) throws Exception;
 
     public Map<String, NodeControllerInfo> getNodeControllersInfo() throws Exception;
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/NodeControllerInfo.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/NodeControllerInfo.java
index fd9218a..73b5488 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/NodeControllerInfo.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/client/NodeControllerInfo.java
@@ -27,10 +27,14 @@
 
     private final NetworkAddress netAddress;
 
-    public NodeControllerInfo(String nodeId, NodeStatus status, NetworkAddress netAddress) {
+    private final NetworkAddress datasetNetworkAddress;
+
+    public NodeControllerInfo(String nodeId, NodeStatus status, NetworkAddress netAddress,
+            NetworkAddress datasetNetworkAddress) {
         this.nodeId = nodeId;
         this.status = status;
         this.netAddress = netAddress;
+        this.datasetNetworkAddress = datasetNetworkAddress;
     }
 
     public String getNodeId() {
@@ -44,4 +48,8 @@
     public NetworkAddress getNetworkAddress() {
         return netAddress;
     }
+
+    public NetworkAddress getDatasetNetworkAddress() {
+        return datasetNetworkAddress;
+    }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksTaskContext.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksTaskContext.java
index e964d66..a2ee977 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksTaskContext.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/context/IHyracksTaskContext.java
@@ -15,6 +15,7 @@
 package edu.uci.ics.hyracks.api.context;
 
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
+import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionManager;
 import edu.uci.ics.hyracks.api.io.IWorkspaceFileFactory;
 import edu.uci.ics.hyracks.api.job.IOperatorEnvironment;
 import edu.uci.ics.hyracks.api.job.profiling.counters.ICounterContext;
@@ -28,5 +29,7 @@
 
     public ICounterContext getCounterContext();
 
+    public IDatasetPartitionManager getDatasetPartitionManager();
+
     public void sendApplicationMessageToCC(byte[] message, String nodeId) throws Exception;
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/IResultSerializer.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/IResultSerializer.java
new file mode 100644
index 0000000..ba2ff9a
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/IResultSerializer.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataflow.value;
+
+import java.io.Serializable;
+
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public interface IResultSerializer extends Serializable {
+    /**
+     * Initializes the serializer.
+     */
+    public void init() throws HyracksDataException;
+
+    /**
+     * Method to serialize the result and append it to the provided output stream
+     * 
+     * @param tAccess
+     *            - A frame tuple accessor object that contains the original data to be serialized
+     * @param tIdx
+     *            - Index of the tuple that should be serialized.
+     * @return true if the tuple was appended successfully, else false.
+     */
+    public boolean appendTuple(IFrameTupleAccessor tAccess, int tIdx) throws HyracksDataException;
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/IResultSerializerFactory.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/IResultSerializerFactory.java
new file mode 100644
index 0000000..1fbf00f
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/IResultSerializerFactory.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataflow.value;
+
+import java.io.PrintStream;
+import java.io.Serializable;
+
+public interface IResultSerializerFactory extends Serializable {
+    /**
+     * Creates a result serialized appender
+     * 
+     * @param printStream
+     *            - A print stream object to which the serialized results will be written.
+     * @return A new instance of result serialized appender.
+     */
+    public IResultSerializer createResultSerializer(RecordDescriptor recordDesc, PrintStream printStream);
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/JSONSerializable.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/JSONSerializable.java
new file mode 100644
index 0000000..1eca502
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataflow/value/JSONSerializable.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataflow.value;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+public interface JSONSerializable {
+    /**
+     * Returns the JSON representation of the object.
+     * 
+     * @return A new JSONObject instance representing this Java object.
+     */
+    public JSONObject toJSON() throws JSONException;
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/DatasetDirectoryRecord.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/DatasetDirectoryRecord.java
new file mode 100644
index 0000000..6316bba
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/DatasetDirectoryRecord.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataset;
+
+import java.io.Serializable;
+
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
+
+public class DatasetDirectoryRecord implements Serializable {
+    public enum Status {
+        IDLE,
+        RUNNING,
+        SUCCESS,
+        FAILED
+    }
+
+    private static final long serialVersionUID = 1L;
+
+    private NetworkAddress address;
+
+    private boolean readEOS;
+
+    private Status status;
+
+    public DatasetDirectoryRecord() {
+        this.address = null;
+        this.readEOS = false;
+        this.status = Status.IDLE;
+    }
+
+    public void setNetworkAddress(NetworkAddress address) {
+        this.address = address;
+    }
+
+    public NetworkAddress getNetworkAddress() {
+        return address;
+    }
+
+    public void readEOS() {
+        this.readEOS = true;
+    }
+
+    public boolean hasReachedReadEOS() {
+        return readEOS;
+    }
+
+    public void start() {
+        status = Status.RUNNING;
+    }
+
+    public void writeEOS() {
+        status = Status.SUCCESS;
+    }
+
+    public void fail() {
+        status = Status.FAILED;
+    }
+
+    public Status getStatus() {
+        return status;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (o == this) {
+            return true;
+        }
+        if (!(o instanceof DatasetDirectoryRecord)) {
+            return false;
+        }
+        return address.equals(((DatasetDirectoryRecord) o).address);
+    }
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetDirectoryService.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetDirectoryService.java
new file mode 100644
index 0000000..5266333
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetDirectoryService.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataset;
+
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord.Status;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.job.JobId;
+
+public interface IDatasetDirectoryService {
+    public void registerResultPartitionLocation(JobId jobId, ResultSetId rsId, boolean orderedResult, int partition,
+            int nPartitions, NetworkAddress networkAddress);
+
+    public void reportResultPartitionWriteCompletion(JobId jobId, ResultSetId rsId, int partition);
+
+    public void reportResultPartitionFailure(JobId jobId, ResultSetId rsId, int partition);
+
+    public Status getResultStatus(JobId jobId, ResultSetId rsId) throws HyracksDataException;
+
+    public DatasetDirectoryRecord[] getResultPartitionLocations(JobId jobId, ResultSetId rsId,
+            DatasetDirectoryRecord[] knownLocations) throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetInputChannelMonitor.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetInputChannelMonitor.java
new file mode 100644
index 0000000..65ba1c7
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetInputChannelMonitor.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataset;
+
+import edu.uci.ics.hyracks.api.channels.IInputChannelMonitor;
+
+public interface IDatasetInputChannelMonitor extends IInputChannelMonitor {
+    public boolean eosReached();
+
+    public boolean failed();
+
+    public int getNFramesAvailable();
+
+    public void notifyFrameRead();
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetPartitionManager.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetPartitionManager.java
new file mode 100644
index 0000000..ae38c7f
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetPartitionManager.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataset;
+
+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.api.io.IWorkspaceFileFactory;
+import edu.uci.ics.hyracks.api.job.JobId;
+
+public interface IDatasetPartitionManager {
+    public IFrameWriter createDatasetPartitionWriter(IHyracksTaskContext ctx, ResultSetId rsId, boolean orderedResult,
+            int partition, int nPartitions) throws HyracksException;
+
+    public void reportPartitionWriteCompletion(JobId jobId, ResultSetId resultSetId, int partition)
+            throws HyracksException;
+
+    public void reportPartitionFailure(JobId jobId, ResultSetId resultSetId, int partition) throws HyracksException;
+
+    public void initializeDatasetPartitionReader(JobId jobId, int partition, IFrameWriter noc) throws HyracksException;
+
+    public IWorkspaceFileFactory getFileFactory();
+
+    public void close();
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetPartitionReader.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetPartitionReader.java
new file mode 100644
index 0000000..8f5ed64
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetPartitionReader.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataset;
+
+import edu.uci.ics.hyracks.api.comm.IFrameWriter;
+
+public interface IDatasetPartitionReader {
+    public void writeTo(IFrameWriter writer);
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetPartitionWriter.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetPartitionWriter.java
new file mode 100644
index 0000000..42dc157
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IDatasetPartitionWriter.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataset;
+
+import edu.uci.ics.hyracks.api.comm.IFrameWriter;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public interface IDatasetPartitionWriter extends IFrameWriter {
+    public Page returnPage() throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IHyracksDataset.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IHyracksDataset.java
new file mode 100644
index 0000000..4a7a6b0
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IHyracksDataset.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataset;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.job.JobId;
+
+public interface IHyracksDataset {
+    public IHyracksDatasetReader createReader(JobId jobId, ResultSetId resultSetId) throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IHyracksDatasetDirectoryServiceConnection.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IHyracksDatasetDirectoryServiceConnection.java
new file mode 100644
index 0000000..d49d5cd
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IHyracksDatasetDirectoryServiceConnection.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataset;
+
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord.Status;
+import edu.uci.ics.hyracks.api.job.JobId;
+
+public interface IHyracksDatasetDirectoryServiceConnection {
+    /**
+     * Gets the result status for the given result set.
+     * 
+     * @param jobId
+     *            ID of the job
+     * @param rsId
+     *            ID of the result set
+     * @return {@link Status}
+     * @throws Exception
+     */
+    public Status getDatasetResultStatus(JobId jobId, ResultSetId rsId) throws Exception;
+
+    /**
+     * Gets the IP Addresses and ports for the partition generating the result for each location.
+     * 
+     * @param jobId
+     *            ID of the job
+     * @param rsId
+     *            ID of the result set
+     * @param knownRecords
+     *            Locations that are already known to the client
+     * @return {@link NetworkAddress[]}
+     * @throws Exception
+     */
+    public DatasetDirectoryRecord[] getDatasetResultLocations(JobId jobId, ResultSetId rsId,
+            DatasetDirectoryRecord[] knownRecords) throws Exception;
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IHyracksDatasetDirectoryServiceInterface.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IHyracksDatasetDirectoryServiceInterface.java
new file mode 100644
index 0000000..ba21a84
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IHyracksDatasetDirectoryServiceInterface.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataset;
+
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord.Status;
+import edu.uci.ics.hyracks.api.job.JobId;
+
+public interface IHyracksDatasetDirectoryServiceInterface {
+    /**
+     * Gets the result status for the given result set.
+     * 
+     * @param jobId
+     *            ID of the job
+     * @param rsId
+     *            ID of the result set
+     * @return {@link Status}
+     * @throws Exception
+     */
+    public Status getDatasetResultStatus(JobId jobId, ResultSetId rsId) throws Exception;
+
+    /**
+     * Gets the IP Addresses and ports for the partition generating the result for each location.
+     * 
+     * @param jobId
+     *            ID of the job
+     * @param rsId
+     *            ID of the result set
+     * @param knownRecords
+     *            Locations from the dataset directory that are already known to the client
+     * @return {@link NetworkAddress[]}
+     * @throws Exception
+     */
+    public DatasetDirectoryRecord[] getDatasetResultLocations(JobId jobId, ResultSetId rsId,
+            DatasetDirectoryRecord[] knownRecords) throws Exception;
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IHyracksDatasetReader.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IHyracksDatasetReader.java
new file mode 100644
index 0000000..b928a49
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/IHyracksDatasetReader.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataset;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord.Status;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public interface IHyracksDatasetReader {
+    public Status getResultStatus();
+
+    public int read(ByteBuffer buffer) throws HyracksDataException;
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/Page.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/Page.java
new file mode 100644
index 0000000..7275dfd
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/Page.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataset;
+
+import java.nio.ByteBuffer;
+
+public class Page {
+    private final ByteBuffer buffer;
+
+    public Page(ByteBuffer buffer) {
+        this.buffer = buffer;
+    }
+
+    public ByteBuffer getBuffer() {
+        return buffer;
+    }
+
+    public ByteBuffer clear() {
+        return (ByteBuffer) buffer.clear();
+    }
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/ResultSetId.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/ResultSetId.java
new file mode 100644
index 0000000..ae38ef3
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/ResultSetId.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.dataset;
+
+import java.io.Serializable;
+
+public class ResultSetId implements Serializable {
+    private static final long serialVersionUID = 1L;
+
+    private final long id;
+
+    public ResultSetId(long id) {
+        this.id = id;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    @Override
+    public int hashCode() {
+        return (int) id;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (o == this) {
+            return true;
+        }
+        if (!(o instanceof ResultSetId)) {
+            return false;
+        }
+        return ((ResultSetId) o).id == id;
+    }
+
+    @Override
+    public String toString() {
+        return "RSID:" + id;
+    }
+}
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/JobSpecification.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/JobSpecification.java
index 7c523f1..1fdff0f 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/JobSpecification.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/job/JobSpecification.java
@@ -34,12 +34,15 @@
 import edu.uci.ics.hyracks.api.dataflow.OperatorDescriptorId;
 import edu.uci.ics.hyracks.api.dataflow.connectors.IConnectorPolicyAssignmentPolicy;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 
 public class JobSpecification implements Serializable, IOperatorDescriptorRegistry, IConnectorDescriptorRegistry {
     private static final long serialVersionUID = 1L;
 
     private final List<OperatorDescriptorId> roots;
 
+    private final List<ResultSetId> resultSetIds;
+
     private final Map<OperatorDescriptorId, IOperatorDescriptor> opMap;
 
     private final Map<ConnectorDescriptorId, IConnectorDescriptor> connMap;
@@ -72,6 +75,7 @@
 
     public JobSpecification() {
         roots = new ArrayList<OperatorDescriptorId>();
+        resultSetIds = new ArrayList<ResultSetId>();
         opMap = new HashMap<OperatorDescriptorId, IOperatorDescriptor>();
         connMap = new HashMap<ConnectorDescriptorId, IConnectorDescriptor>();
         opInputMap = new HashMap<OperatorDescriptorId, List<IConnectorDescriptor>>();
@@ -104,6 +108,10 @@
         roots.add(op.getOperatorId());
     }
 
+    public void addResultSetId(ResultSetId rsId) {
+        resultSetIds.add(rsId);
+    }
+
     public void connect(IConnectorDescriptor conn, IOperatorDescriptor producerOp, int producerPort,
             IOperatorDescriptor consumerOp, int consumerPort) {
         insertIntoIndexedMap(opInputMap, consumerOp.getOperatorId(), consumerPort, conn);
@@ -208,6 +216,10 @@
         return roots;
     }
 
+    public List<ResultSetId> getResultSetIds() {
+        return resultSetIds;
+    }
+
     public IConnectorPolicyAssignmentPolicy getConnectorPolicyAssignmentPolicy() {
         return connectorPolicyAssignmentPolicy;
     }
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/partitions/ResultSetPartitionId.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/partitions/ResultSetPartitionId.java
new file mode 100644
index 0000000..148a8a2
--- /dev/null
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/partitions/ResultSetPartitionId.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.api.partitions;
+
+import java.io.Serializable;
+
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.job.JobId;
+
+public final class ResultSetPartitionId implements Serializable {
+    private static final long serialVersionUID = 1L;
+
+    private final JobId jobId;
+
+    private final ResultSetId resultSetId;
+    
+    private final int partition;
+
+    public ResultSetPartitionId(JobId jobId, ResultSetId resultSetId, int partition) {
+        this.jobId = jobId;
+        this.resultSetId = resultSetId;
+        this.partition = partition;
+    }
+
+    public JobId getJobId() {
+        return jobId;
+    }
+
+    public ResultSetId getResultSetId() {
+        return resultSetId;
+    }
+
+    public int getPartition() {
+        return partition;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((resultSetId == null) ? 0 : resultSetId.hashCode());
+        result = prime * result + ((jobId == null) ? 0 : jobId.hashCode());
+        result = prime * result + partition;
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        ResultSetPartitionId other = (ResultSetPartitionId) obj;
+        if (resultSetId == null) {
+            if (other.resultSetId != null)
+                return false;
+        } else if (!resultSetId.equals(other.resultSetId))
+            return false;
+        if (jobId == null) {
+            if (other.jobId != null)
+                return false;
+        } else if (!jobId.equals(other.jobId))
+            return false;
+        if (partition != other.partition)
+            return false;
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        return jobId.toString() + ":" + resultSetId + ":" + partition;
+    }
+}
\ 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 eba5560..7d50fa0 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
@@ -36,8 +36,8 @@
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 
 /**
- * The runtime of a SuperActivity, which internally executes a DAG of one-to-one connected
- * activities in a single thread.
+ * The runtime of a SuperActivity, which internally executes a DAG of one-to-one
+ * connected activities in a single thread.
  * 
  * @author yingyib
  */
@@ -62,7 +62,8 @@
         this.nPartitions = nPartitions;
 
         /**
-         * initialize the writer-relationship for the internal DAG of operator node pushables
+         * initialize the writer-relationship for the internal DAG of operator
+         * node pushables
          */
         try {
             init();
@@ -72,7 +73,7 @@
     }
 
     @Override
-    public synchronized void initialize() throws HyracksDataException {
+    public void initialize() throws HyracksDataException {
         /**
          * initialize operator node pushables in the BFS order
          */
@@ -105,7 +106,8 @@
         }
 
         /**
-         * Using BFS (breadth-first search) to construct to runtime execution DAG;
+         * Using BFS (breadth-first search) to construct to runtime execution
+         * DAG;
          */
         while (childQueue.size() > 0) {
             /**
@@ -165,8 +167,7 @@
     }
 
     @Override
-    public synchronized void setOutputFrameWriter(int clusterOutputIndex, IFrameWriter writer,
-            RecordDescriptor recordDesc) {
+    public void setOutputFrameWriter(int clusterOutputIndex, IFrameWriter writer, RecordDescriptor recordDesc) {
         /**
          * set the right output frame writer
          */
@@ -176,7 +177,7 @@
     }
 
     @Override
-    public synchronized IFrameWriter getInputFrameWriter(final int index) {
+    public IFrameWriter getInputFrameWriter(final int index) {
         /**
          * get the right IFrameWriter from the cluster input index
          */
diff --git a/hyracks/hyracks-cli/pom.xml b/hyracks/hyracks-cli/pom.xml
index 991ce2a..304c8ce 100644
--- a/hyracks/hyracks-cli/pom.xml
+++ b/hyracks/hyracks-cli/pom.xml
@@ -2,13 +2,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-cli</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-cli</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -92,7 +92,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   </dependencies>
diff --git a/hyracks/hyracks-client/pom.xml b/hyracks/hyracks-client/pom.xml
new file mode 100644
index 0000000..c86b0d3
--- /dev/null
+++ b/hyracks/hyracks-client/pom.xml
@@ -0,0 +1,46 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <artifactId>hyracks-client</artifactId>
+  <name>hyracks-client</name>
+  <parent>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks</artifactId>
+    <version>0.2.4-SNAPSHOT</version>
+  </parent>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.0.2</version>
+        <configuration>
+          <source>1.7</source>
+          <target>1.7</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+ <dependency>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks-api</artifactId>
+    <version>0.2.4-SNAPSHOT</version>
+ </dependency>
+ <dependency>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks-net</artifactId>
+    <version>0.2.4-SNAPSHOT</version>
+ </dependency>
+ <dependency>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks-comm</artifactId>
+    <version>0.2.4-SNAPSHOT</version>
+ </dependency>
+  <dependency>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks-dataflow-common</artifactId>
+    <version>0.2.4-SNAPSHOT</version>
+ </dependency>
+  </dependencies>
+</project>
diff --git a/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/DatasetClientContext.java b/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/DatasetClientContext.java
new file mode 100644
index 0000000..8be4a8c
--- /dev/null
+++ b/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/DatasetClientContext.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.client.dataset;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+
+public class DatasetClientContext implements IHyracksCommonContext {
+    private final int frameSize;
+
+    public DatasetClientContext(int frameSize) {
+        this.frameSize = frameSize;
+    }
+
+    @Override
+    public int getFrameSize() {
+        return frameSize;
+    }
+
+    @Override
+    public IIOManager getIOManager() {
+        return null;
+    }
+
+    @Override
+    public ByteBuffer allocateFrame() {
+        return ByteBuffer.allocate(frameSize);
+    }
+
+}
diff --git a/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/HyracksDataset.java b/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/HyracksDataset.java
new file mode 100644
index 0000000..6866e46
--- /dev/null
+++ b/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/HyracksDataset.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.client.dataset;
+
+import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
+import edu.uci.ics.hyracks.api.dataset.IHyracksDataset;
+import edu.uci.ics.hyracks.api.dataset.IHyracksDatasetDirectoryServiceConnection;
+import edu.uci.ics.hyracks.api.dataset.IHyracksDatasetReader;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.job.JobId;
+import edu.uci.ics.hyracks.client.net.ClientNetworkManager;
+
+public class HyracksDataset implements IHyracksDataset {
+    private final IHyracksDatasetDirectoryServiceConnection datasetDirectoryServiceConnection;
+
+    private final ClientNetworkManager netManager;
+
+    private final DatasetClientContext datasetClientCtx;
+
+    public HyracksDataset(IHyracksClientConnection hcc, int frameSize, int nReaders) throws Exception {
+        NetworkAddress ddsAddress = hcc.getDatasetDirectoryServiceInfo();
+        datasetDirectoryServiceConnection = new HyracksDatasetDirectoryServiceConnection(new String(
+                ddsAddress.getIpAddress()), ddsAddress.getPort());
+
+        netManager = new ClientNetworkManager(nReaders);
+        netManager.start();
+
+        datasetClientCtx = new DatasetClientContext(frameSize);
+    }
+
+    @Override
+    public IHyracksDatasetReader createReader(JobId jobId, ResultSetId resultSetId) throws HyracksDataException {
+        IHyracksDatasetReader reader = null;
+        try {
+            reader = new HyracksDatasetReader(datasetDirectoryServiceConnection, netManager, datasetClientCtx, jobId,
+                    resultSetId);
+        } catch (Exception e) {
+            throw new HyracksDataException(e);
+        }
+        return reader;
+    }
+}
diff --git a/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/HyracksDatasetDirectoryServiceConnection.java b/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/HyracksDatasetDirectoryServiceConnection.java
new file mode 100644
index 0000000..095fd7d
--- /dev/null
+++ b/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/HyracksDatasetDirectoryServiceConnection.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.client.dataset;
+
+import java.net.InetSocketAddress;
+
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord;
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord.Status;
+import edu.uci.ics.hyracks.api.dataset.IHyracksDatasetDirectoryServiceConnection;
+import edu.uci.ics.hyracks.api.dataset.IHyracksDatasetDirectoryServiceInterface;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.job.JobId;
+import edu.uci.ics.hyracks.ipc.api.IIPCHandle;
+import edu.uci.ics.hyracks.ipc.api.RPCInterface;
+import edu.uci.ics.hyracks.ipc.impl.IPCSystem;
+import edu.uci.ics.hyracks.ipc.impl.JavaSerializationBasedPayloadSerializerDeserializer;
+
+//TODO(madhusudancs): Should this implementation be moved to edu.uci.ics.hyracks.client?
+public class HyracksDatasetDirectoryServiceConnection implements IHyracksDatasetDirectoryServiceConnection {
+    private final IPCSystem ipc;
+    private final IHyracksDatasetDirectoryServiceInterface ddsi;
+
+    public HyracksDatasetDirectoryServiceConnection(String ddsHost, int ddsPort) throws Exception {
+        RPCInterface rpci = new RPCInterface();
+        ipc = new IPCSystem(new InetSocketAddress(0), rpci, new JavaSerializationBasedPayloadSerializerDeserializer());
+        ipc.start();
+        IIPCHandle ddsIpchandle = ipc.getHandle(new InetSocketAddress(ddsHost, ddsPort));
+        this.ddsi = new HyracksDatasetDirectoryServiceInterfaceRemoteProxy(ddsIpchandle, rpci);
+    }
+
+    @Override
+    public Status getDatasetResultStatus(JobId jobId, ResultSetId rsId) throws Exception {
+        return ddsi.getDatasetResultStatus(jobId, rsId);
+    }
+
+    @Override
+    public DatasetDirectoryRecord[] getDatasetResultLocations(JobId jobId, ResultSetId rsId,
+            DatasetDirectoryRecord[] knownRecords) throws Exception {
+        return ddsi.getDatasetResultLocations(jobId, rsId, knownRecords);
+    }
+}
diff --git a/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/HyracksDatasetDirectoryServiceInterfaceRemoteProxy.java b/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/HyracksDatasetDirectoryServiceInterfaceRemoteProxy.java
new file mode 100644
index 0000000..47cdf97
--- /dev/null
+++ b/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/HyracksDatasetDirectoryServiceInterfaceRemoteProxy.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.client.dataset;
+
+import edu.uci.ics.hyracks.api.client.HyracksClientInterfaceFunctions;
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord;
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord.Status;
+import edu.uci.ics.hyracks.api.dataset.IHyracksDatasetDirectoryServiceInterface;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.job.JobId;
+import edu.uci.ics.hyracks.ipc.api.IIPCHandle;
+import edu.uci.ics.hyracks.ipc.api.RPCInterface;
+
+//TODO(madhusudancs): Should this implementation be moved to edu.uci.ics.hyracks.client?
+public class HyracksDatasetDirectoryServiceInterfaceRemoteProxy implements IHyracksDatasetDirectoryServiceInterface {
+    private final IIPCHandle ipcHandle;
+
+    private final RPCInterface rpci;
+
+    public HyracksDatasetDirectoryServiceInterfaceRemoteProxy(IIPCHandle ipcHandle, RPCInterface rpci) {
+        this.ipcHandle = ipcHandle;
+        this.rpci = rpci;
+    }
+
+    @Override
+    public Status getDatasetResultStatus(JobId jobId, ResultSetId rsId) throws Exception {
+        HyracksClientInterfaceFunctions.GetDatasetResultStatusFunction gdrlf = new HyracksClientInterfaceFunctions.GetDatasetResultStatusFunction(
+                jobId, rsId);
+        return (Status) rpci.call(ipcHandle, gdrlf);
+    }
+
+    @Override
+    public DatasetDirectoryRecord[] getDatasetResultLocations(JobId jobId, ResultSetId rsId,
+            DatasetDirectoryRecord[] knownRecords) throws Exception {
+        HyracksClientInterfaceFunctions.GetDatasetResultLocationsFunction gdrlf = new HyracksClientInterfaceFunctions.GetDatasetResultLocationsFunction(
+                jobId, rsId, knownRecords);
+        return (DatasetDirectoryRecord[]) rpci.call(ipcHandle, gdrlf);
+    }
+}
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
new file mode 100644
index 0000000..78bcf20
--- /dev/null
+++ b/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/dataset/HyracksDatasetReader.java
@@ -0,0 +1,255 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.client.dataset;
+
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+import java.net.UnknownHostException;
+import java.nio.ByteBuffer;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.logging.Logger;
+
+import edu.uci.ics.hyracks.api.channels.IInputChannel;
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord;
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord.Status;
+import edu.uci.ics.hyracks.api.dataset.IDatasetInputChannelMonitor;
+import edu.uci.ics.hyracks.api.dataset.IHyracksDatasetDirectoryServiceConnection;
+import edu.uci.ics.hyracks.api.dataset.IHyracksDatasetReader;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.job.JobId;
+import edu.uci.ics.hyracks.client.net.ClientNetworkManager;
+import edu.uci.ics.hyracks.comm.channels.DatasetNetworkInputChannel;
+
+// TODO(madhusudancs): Should this implementation be moved to edu.uci.ics.hyracks.client?
+public class HyracksDatasetReader implements IHyracksDatasetReader {
+    private static final Logger LOGGER = Logger.getLogger(HyracksDatasetReader.class.getName());
+
+    private final IHyracksDatasetDirectoryServiceConnection datasetDirectoryServiceConnection;
+
+    private final ClientNetworkManager netManager;
+
+    private final DatasetClientContext datasetClientCtx;
+
+    private JobId jobId;
+
+    private ResultSetId resultSetId;
+
+    private DatasetDirectoryRecord[] knownRecords;
+
+    private IDatasetInputChannelMonitor[] monitors;
+
+    private int lastReadPartition;
+
+    private IDatasetInputChannelMonitor lastMonitor;
+
+    private DatasetNetworkInputChannel resultChannel;
+
+    private static int NUM_READ_BUFFERS = 1;
+
+    public HyracksDatasetReader(IHyracksDatasetDirectoryServiceConnection datasetDirectoryServiceConnection,
+            ClientNetworkManager netManager, DatasetClientContext datasetClientCtx, JobId jobId, ResultSetId resultSetId)
+            throws Exception {
+        this.datasetDirectoryServiceConnection = datasetDirectoryServiceConnection;
+        this.netManager = netManager;
+        this.datasetClientCtx = datasetClientCtx;
+        this.jobId = jobId;
+        this.resultSetId = resultSetId;
+        knownRecords = null;
+        monitors = null;
+        lastReadPartition = -1;
+        lastMonitor = null;
+        resultChannel = null;
+    }
+
+    @Override
+    public Status getResultStatus() {
+        Status status = null;
+        try {
+            status = datasetDirectoryServiceConnection.getDatasetResultStatus(jobId, resultSetId);
+        } catch (Exception e) {
+            // TODO(madhusudancs): Decide what to do in case of error
+        }
+        return status;
+    }
+
+    @Override
+    public int read(ByteBuffer buffer) throws HyracksDataException {
+        ByteBuffer readBuffer;
+        int readSize = 0;
+
+        if (lastReadPartition == -1) {
+            while (knownRecords == null || knownRecords[0] == null) {
+                try {
+                    knownRecords = datasetDirectoryServiceConnection.getDatasetResultLocations(jobId, resultSetId,
+                            knownRecords);
+                    lastReadPartition = 0;
+                    resultChannel = new DatasetNetworkInputChannel(netManager,
+                            getSocketAddress(knownRecords[lastReadPartition]), jobId, lastReadPartition,
+                            NUM_READ_BUFFERS);
+                    lastMonitor = getMonitor(lastReadPartition);
+                    resultChannel.open(datasetClientCtx);
+                    resultChannel.registerMonitor(lastMonitor);
+                } catch (HyracksException e) {
+                    throw new HyracksDataException(e);
+                } catch (UnknownHostException e) {
+                    throw new HyracksDataException(e);
+                } catch (Exception e) {
+                    // Do nothing here.
+                }
+            }
+        }
+
+        while (readSize <= 0 && !((lastReadPartition == knownRecords.length - 1) && (lastMonitor.eosReached()))) {
+            synchronized (lastMonitor) {
+                while (lastMonitor.getNFramesAvailable() <= 0 && !lastMonitor.eosReached()) {
+                    try {
+                        lastMonitor.wait();
+                    } catch (InterruptedException e) {
+                        throw new HyracksDataException(e);
+                    }
+                }
+            }
+
+            if (lastMonitor.getNFramesAvailable() <= 0 && lastMonitor.eosReached()) {
+                knownRecords[lastReadPartition].readEOS();
+                if ((lastReadPartition == knownRecords.length - 1)) {
+                    break;
+                } else {
+                    try {
+                        lastReadPartition++;
+                        while (knownRecords[lastReadPartition] == null) {
+                            try {
+                                knownRecords = datasetDirectoryServiceConnection.getDatasetResultLocations(jobId,
+                                        resultSetId, knownRecords);
+                            } catch (Exception e) {
+                                // Do nothing here.
+                            }
+                        }
+
+                        resultChannel = new DatasetNetworkInputChannel(netManager,
+                                getSocketAddress(knownRecords[lastReadPartition]), jobId, lastReadPartition,
+                                NUM_READ_BUFFERS);
+                        lastMonitor = getMonitor(lastReadPartition);
+                        resultChannel.open(datasetClientCtx);
+                        resultChannel.registerMonitor(lastMonitor);
+                    } catch (HyracksException e) {
+                        throw new HyracksDataException(e);
+                    } catch (UnknownHostException e) {
+                        throw new HyracksDataException(e);
+                    }
+                }
+            } else {
+                readBuffer = resultChannel.getNextBuffer();
+                lastMonitor.notifyFrameRead();
+                if (readBuffer != null) {
+                    buffer.put(readBuffer);
+                    buffer.flip();
+                    readSize = buffer.limit();
+                    resultChannel.recycleBuffer(readBuffer);
+                }
+            }
+        }
+
+        return readSize;
+    }
+
+    private boolean nullExists(DatasetDirectoryRecord[] locations) {
+        if (locations == null) {
+            return true;
+        }
+        for (int i = 0; i < locations.length; i++) {
+            if (locations[i] == null) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private SocketAddress getSocketAddress(DatasetDirectoryRecord addr) throws UnknownHostException {
+        NetworkAddress netAddr = addr.getNetworkAddress();
+        return new InetSocketAddress(InetAddress.getByAddress(netAddr.getIpAddress()), netAddr.getPort());
+    }
+
+    private IDatasetInputChannelMonitor getMonitor(int partition) throws HyracksException {
+        if (knownRecords == null || knownRecords[partition] == null) {
+            throw new HyracksException("Accessing monitors before the obtaining the corresponding addresses.");
+        }
+        if (monitors == null) {
+            monitors = new DatasetInputChannelMonitor[knownRecords.length];
+        }
+        if (monitors[partition] == null) {
+            monitors[partition] = new DatasetInputChannelMonitor();
+        }
+        return monitors[partition];
+    }
+
+    private class DatasetInputChannelMonitor implements IDatasetInputChannelMonitor {
+        private final AtomicInteger nAvailableFrames;
+
+        private final AtomicBoolean eos;
+
+        private final AtomicBoolean failed;
+
+        public DatasetInputChannelMonitor() {
+            nAvailableFrames = new AtomicInteger(0);
+            eos = new AtomicBoolean(false);
+            failed = new AtomicBoolean(false);
+        }
+
+        @Override
+        public synchronized void notifyFailure(IInputChannel channel) {
+            failed.set(true);
+            notifyAll();
+        }
+
+        @Override
+        public synchronized void notifyDataAvailability(IInputChannel channel, int nFrames) {
+            nAvailableFrames.addAndGet(nFrames);
+            notifyAll();
+        }
+
+        @Override
+        public synchronized void notifyEndOfStream(IInputChannel channel) {
+            eos.set(true);
+            notifyAll();
+        }
+
+        @Override
+        public synchronized boolean eosReached() {
+            return eos.get();
+        }
+
+        @Override
+        public synchronized boolean failed() {
+            return failed.get();
+        }
+
+        @Override
+        public synchronized int getNFramesAvailable() {
+            return nAvailableFrames.get();
+        }
+
+        @Override
+        public synchronized void notifyFrameRead() {
+            nAvailableFrames.decrementAndGet();
+        }
+
+    }
+}
diff --git a/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/net/ClientNetworkManager.java b/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/net/ClientNetworkManager.java
new file mode 100644
index 0000000..7aef8b9
--- /dev/null
+++ b/hyracks/hyracks-client/src/main/java/edu/uci/ics/hyracks/client/net/ClientNetworkManager.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.client.net;
+
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+
+import edu.uci.ics.hyracks.comm.channels.IChannelConnectionFactory;
+import edu.uci.ics.hyracks.net.exceptions.NetException;
+import edu.uci.ics.hyracks.net.protocols.muxdemux.ChannelControlBlock;
+import edu.uci.ics.hyracks.net.protocols.muxdemux.MultiplexedConnection;
+import edu.uci.ics.hyracks.net.protocols.muxdemux.MuxDemux;
+import edu.uci.ics.hyracks.net.protocols.muxdemux.MuxDemuxPerformanceCounters;
+
+public class ClientNetworkManager implements IChannelConnectionFactory {
+    private static final int MAX_CONNECTION_ATTEMPTS = 5;
+
+    private final MuxDemux md;
+
+    public ClientNetworkManager(int nThreads) throws IOException {
+        /* This is a connect only socket and does not listen to any incoming connections, so pass null to
+         * localAddress and listener.
+         */
+        md = new MuxDemux(null, null, nThreads, MAX_CONNECTION_ATTEMPTS);
+    }
+
+    public void start() throws IOException {
+        md.start();
+    }
+
+    public void stop() {
+
+    }
+
+    public ChannelControlBlock connect(SocketAddress remoteAddress) throws InterruptedException, NetException {
+        MultiplexedConnection mConn = md.connect((InetSocketAddress) remoteAddress);
+        return mConn.openChannel();
+    }
+
+    public MuxDemuxPerformanceCounters getPerformanceCounters() {
+        return md.getPerformanceCounters();
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-comm/pom.xml b/hyracks/hyracks-comm/pom.xml
new file mode 100644
index 0000000..2720f95
--- /dev/null
+++ b/hyracks/hyracks-comm/pom.xml
@@ -0,0 +1,36 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <artifactId>hyracks-comm</artifactId>
+  <name>hyracks-comm</name>
+  <parent>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks</artifactId>
+    <version>0.2.4-SNAPSHOT</version>
+  </parent>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.0.2</version>
+        <configuration>
+          <source>1.7</source>
+          <target>1.7</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+ <dependency>
+ 	<groupId>edu.uci.ics.hyracks</groupId>
+ 	<artifactId>hyracks-api</artifactId>
+ 	<version>0.2.4-SNAPSHOT</version>
+ </dependency>
+  <dependency>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks-net</artifactId>
+    <version>0.2.4-SNAPSHOT</version>
+ </dependency>
+  </dependencies>
+</project>
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkInputChannel.java b/hyracks/hyracks-comm/src/main/java/edu/uci/ics/hyracks/comm/channels/DatasetNetworkInputChannel.java
similarity index 72%
copy from hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkInputChannel.java
copy to hyracks/hyracks-comm/src/main/java/edu/uci/ics/hyracks/comm/channels/DatasetNetworkInputChannel.java
index 1d5af84..fac2949 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkInputChannel.java
+++ b/hyracks/hyracks-comm/src/main/java/edu/uci/ics/hyracks/comm/channels/DatasetNetworkInputChannel.java
@@ -12,7 +12,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hyracks.control.nc.net;
+package edu.uci.ics.hyracks.comm.channels;
 
 import java.net.SocketAddress;
 import java.nio.ByteBuffer;
@@ -23,21 +23,25 @@
 
 import edu.uci.ics.hyracks.api.channels.IInputChannel;
 import edu.uci.ics.hyracks.api.channels.IInputChannelMonitor;
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.api.partitions.PartitionId;
+import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.net.buffers.IBufferAcceptor;
 import edu.uci.ics.hyracks.net.buffers.ICloseableBufferAcceptor;
 import edu.uci.ics.hyracks.net.protocols.muxdemux.ChannelControlBlock;
 
-public class NetworkInputChannel implements IInputChannel {
-    private static final Logger LOGGER = Logger.getLogger(NetworkInputChannel.class.getName());
+public class DatasetNetworkInputChannel implements IInputChannel {
+    private static final Logger LOGGER = Logger.getLogger(DatasetNetworkInputChannel.class.getName());
 
-    private final NetworkManager netManager;
+    static final int INITIAL_MESSAGE_SIZE = 20;
+
+    private final IChannelConnectionFactory netManager;
 
     private final SocketAddress remoteAddress;
 
-    private final PartitionId partitionId;
+    private final JobId jobId;
+
+    private final int partition;
 
     private final Queue<ByteBuffer> fullQueue;
 
@@ -49,11 +53,12 @@
 
     private Object attachment;
 
-    public NetworkInputChannel(NetworkManager netManager, SocketAddress remoteAddress, PartitionId partitionId,
-            int nBuffers) {
+    public DatasetNetworkInputChannel(IChannelConnectionFactory netManager, SocketAddress remoteAddress, JobId jobId,
+            int partition, int nBuffers) {
         this.netManager = netManager;
         this.remoteAddress = remoteAddress;
-        this.partitionId = partitionId;
+        this.jobId = jobId;
+        this.partition = partition;
         fullQueue = new ArrayDeque<ByteBuffer>(nBuffers);
         this.nBuffers = nBuffers;
     }
@@ -85,7 +90,7 @@
     }
 
     @Override
-    public void open(IHyracksTaskContext ctx) throws HyracksDataException {
+    public void open(IHyracksCommonContext ctx) throws HyracksDataException {
         try {
             ccb = netManager.connect(remoteAddress);
         } catch (Exception e) {
@@ -96,14 +101,13 @@
         for (int i = 0; i < nBuffers; ++i) {
             ccb.getReadInterface().getEmptyBufferAcceptor().accept(ctx.allocateFrame());
         }
-        ByteBuffer writeBuffer = ByteBuffer.allocate(NetworkManager.INITIAL_MESSAGE_SIZE);
-        writeBuffer.putLong(partitionId.getJobId().getId());
-        writeBuffer.putInt(partitionId.getConnectorDescriptorId().getId());
-        writeBuffer.putInt(partitionId.getSenderIndex());
-        writeBuffer.putInt(partitionId.getReceiverIndex());
+        ByteBuffer writeBuffer = ByteBuffer.allocate(INITIAL_MESSAGE_SIZE);
+        writeBuffer.putLong(jobId.getId());
+        writeBuffer.putInt(partition);
         writeBuffer.flip();
         if (LOGGER.isLoggable(Level.FINE)) {
-            LOGGER.fine("Sending partition request: " + partitionId + " on channel: " + ccb);
+            LOGGER.fine("Sending partition request for JobId: " + jobId + " partition: " + partition + " on channel: "
+                    + ccb);
         }
         ccb.getWriteInterface().getFullBufferAcceptor().accept(writeBuffer);
         ccb.getWriteInterface().getFullBufferAcceptor().close();
@@ -118,17 +122,17 @@
         @Override
         public void accept(ByteBuffer buffer) {
             fullQueue.add(buffer);
-            monitor.notifyDataAvailability(NetworkInputChannel.this, 1);
+            monitor.notifyDataAvailability(DatasetNetworkInputChannel.this, 1);
         }
 
         @Override
         public void close() {
-            monitor.notifyEndOfStream(NetworkInputChannel.this);
+            monitor.notifyEndOfStream(DatasetNetworkInputChannel.this);
         }
 
         @Override
         public void error(int ecode) {
-            monitor.notifyFailure(NetworkInputChannel.this);
+            monitor.notifyFailure(DatasetNetworkInputChannel.this);
         }
     }
 
diff --git a/hyracks/hyracks-comm/src/main/java/edu/uci/ics/hyracks/comm/channels/IChannelConnectionFactory.java b/hyracks/hyracks-comm/src/main/java/edu/uci/ics/hyracks/comm/channels/IChannelConnectionFactory.java
new file mode 100644
index 0000000..33179ba
--- /dev/null
+++ b/hyracks/hyracks-comm/src/main/java/edu/uci/ics/hyracks/comm/channels/IChannelConnectionFactory.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.comm.channels;
+
+import java.net.SocketAddress;
+
+import edu.uci.ics.hyracks.net.exceptions.NetException;
+import edu.uci.ics.hyracks.net.protocols.muxdemux.ChannelControlBlock;
+
+public interface IChannelConnectionFactory {
+    public ChannelControlBlock connect(SocketAddress remoteAddress) throws InterruptedException, NetException;
+}
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkInputChannel.java b/hyracks/hyracks-comm/src/main/java/edu/uci/ics/hyracks/comm/channels/NetworkInputChannel.java
similarity index 89%
rename from hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkInputChannel.java
rename to hyracks/hyracks-comm/src/main/java/edu/uci/ics/hyracks/comm/channels/NetworkInputChannel.java
index 1d5af84..aa37b16 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkInputChannel.java
+++ b/hyracks/hyracks-comm/src/main/java/edu/uci/ics/hyracks/comm/channels/NetworkInputChannel.java
@@ -12,7 +12,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hyracks.control.nc.net;
+package edu.uci.ics.hyracks.comm.channels;
 
 import java.net.SocketAddress;
 import java.nio.ByteBuffer;
@@ -23,7 +23,7 @@
 
 import edu.uci.ics.hyracks.api.channels.IInputChannel;
 import edu.uci.ics.hyracks.api.channels.IInputChannelMonitor;
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.partitions.PartitionId;
 import edu.uci.ics.hyracks.net.buffers.IBufferAcceptor;
@@ -33,7 +33,9 @@
 public class NetworkInputChannel implements IInputChannel {
     private static final Logger LOGGER = Logger.getLogger(NetworkInputChannel.class.getName());
 
-    private final NetworkManager netManager;
+    static final int INITIAL_MESSAGE_SIZE = 20;
+
+    private final IChannelConnectionFactory netManager;
 
     private final SocketAddress remoteAddress;
 
@@ -49,8 +51,8 @@
 
     private Object attachment;
 
-    public NetworkInputChannel(NetworkManager netManager, SocketAddress remoteAddress, PartitionId partitionId,
-            int nBuffers) {
+    public NetworkInputChannel(IChannelConnectionFactory netManager, SocketAddress remoteAddress,
+            PartitionId partitionId, int nBuffers) {
         this.netManager = netManager;
         this.remoteAddress = remoteAddress;
         this.partitionId = partitionId;
@@ -85,7 +87,7 @@
     }
 
     @Override
-    public void open(IHyracksTaskContext ctx) throws HyracksDataException {
+    public void open(IHyracksCommonContext ctx) throws HyracksDataException {
         try {
             ccb = netManager.connect(remoteAddress);
         } catch (Exception e) {
@@ -96,7 +98,7 @@
         for (int i = 0; i < nBuffers; ++i) {
             ccb.getReadInterface().getEmptyBufferAcceptor().accept(ctx.allocateFrame());
         }
-        ByteBuffer writeBuffer = ByteBuffer.allocate(NetworkManager.INITIAL_MESSAGE_SIZE);
+        ByteBuffer writeBuffer = ByteBuffer.allocate(INITIAL_MESSAGE_SIZE);
         writeBuffer.putLong(partitionId.getJobId().getId());
         writeBuffer.putInt(partitionId.getConnectorDescriptorId().getId());
         writeBuffer.putInt(partitionId.getSenderIndex());
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkOutputChannel.java b/hyracks/hyracks-comm/src/main/java/edu/uci/ics/hyracks/comm/channels/NetworkOutputChannel.java
similarity index 92%
rename from hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkOutputChannel.java
rename to hyracks/hyracks-comm/src/main/java/edu/uci/ics/hyracks/comm/channels/NetworkOutputChannel.java
index 9024e18..812a2de 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkOutputChannel.java
+++ b/hyracks/hyracks-comm/src/main/java/edu/uci/ics/hyracks/comm/channels/NetworkOutputChannel.java
@@ -12,14 +12,13 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hyracks.control.nc.net;
+package edu.uci.ics.hyracks.comm.channels;
 
 import java.nio.ByteBuffer;
 import java.util.ArrayDeque;
 import java.util.Deque;
 
 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.net.buffers.IBufferAcceptor;
 import edu.uci.ics.hyracks.net.protocols.muxdemux.ChannelControlBlock;
@@ -40,9 +39,9 @@
         ccb.getWriteInterface().setEmptyBufferAcceptor(new WriteEmptyBufferAcceptor());
     }
 
-    public void setTaskContext(IHyracksTaskContext ctx) {
+    public void setFrameSize(int frameSize) {
         for (int i = 0; i < nBuffers; ++i) {
-            emptyStack.push(ByteBuffer.allocateDirect(ctx.getFrameSize()));
+            emptyStack.push(ByteBuffer.allocateDirect(frameSize));
         }
     }
 
@@ -87,7 +86,7 @@
         ccb.getWriteInterface().getFullBufferAcceptor().close();
     }
 
-    void abort() {
+    public void abort() {
         ccb.getWriteInterface().getFullBufferAcceptor().error(1);
         synchronized (NetworkOutputChannel.this) {
             aborted = true;
diff --git a/hyracks/hyracks-control/hyracks-control-cc/pom.xml b/hyracks/hyracks-control/hyracks-control-cc/pom.xml
index d644673..1730595 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/pom.xml
+++ b/hyracks/hyracks-control/hyracks-control-cc/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-control</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -26,7 +26,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/ClusterControllerService.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/ClusterControllerService.java
index 5a33891..82457fe 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/ClusterControllerService.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/ClusterControllerService.java
@@ -35,12 +35,17 @@
 import edu.uci.ics.hyracks.api.client.ClusterControllerInfo;
 import edu.uci.ics.hyracks.api.client.HyracksClientInterfaceFunctions;
 import edu.uci.ics.hyracks.api.client.NodeControllerInfo;
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
 import edu.uci.ics.hyracks.api.context.ICCContext;
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord;
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord.Status;
+import edu.uci.ics.hyracks.api.dataset.IDatasetDirectoryService;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.job.JobStatus;
 import edu.uci.ics.hyracks.api.topology.ClusterTopology;
 import edu.uci.ics.hyracks.api.topology.TopologyDefinitionParser;
 import edu.uci.ics.hyracks.control.cc.application.CCApplicationContext;
+import edu.uci.ics.hyracks.control.cc.dataset.DatasetDirectoryService;
 import edu.uci.ics.hyracks.control.cc.job.JobRun;
 import edu.uci.ics.hyracks.control.cc.web.WebServer;
 import edu.uci.ics.hyracks.control.cc.work.ApplicationCreateWork;
@@ -48,17 +53,23 @@
 import edu.uci.ics.hyracks.control.cc.work.ApplicationMessageWork;
 import edu.uci.ics.hyracks.control.cc.work.ApplicationStartWork;
 import edu.uci.ics.hyracks.control.cc.work.ApplicationStateChangeWork;
+import edu.uci.ics.hyracks.control.cc.work.GetDatasetDirectoryServiceInfoWork;
 import edu.uci.ics.hyracks.control.cc.work.GetIpAddressNodeNameMapWork;
 import edu.uci.ics.hyracks.control.cc.work.GetJobStatusWork;
 import edu.uci.ics.hyracks.control.cc.work.GetNodeControllersInfoWork;
+import edu.uci.ics.hyracks.control.cc.work.GetResultPartitionLocationsWork;
+import edu.uci.ics.hyracks.control.cc.work.GetResultStatusWork;
 import edu.uci.ics.hyracks.control.cc.work.JobStartWork;
 import edu.uci.ics.hyracks.control.cc.work.JobletCleanupNotificationWork;
 import edu.uci.ics.hyracks.control.cc.work.NodeHeartbeatWork;
 import edu.uci.ics.hyracks.control.cc.work.RegisterNodeWork;
 import edu.uci.ics.hyracks.control.cc.work.RegisterPartitionAvailibilityWork;
 import edu.uci.ics.hyracks.control.cc.work.RegisterPartitionRequestWork;
+import edu.uci.ics.hyracks.control.cc.work.RegisterResultPartitionLocationWork;
 import edu.uci.ics.hyracks.control.cc.work.RemoveDeadNodesWork;
 import edu.uci.ics.hyracks.control.cc.work.ReportProfilesWork;
+import edu.uci.ics.hyracks.control.cc.work.ReportResultPartitionFailureWork;
+import edu.uci.ics.hyracks.control.cc.work.ReportResultPartitionWriteCompletionWork;
 import edu.uci.ics.hyracks.control.cc.work.TaskCompleteWork;
 import edu.uci.ics.hyracks.control.cc.work.TaskFailureWork;
 import edu.uci.ics.hyracks.control.cc.work.UnregisterNodeWork;
@@ -115,6 +126,8 @@
 
     private final DeadNodeSweeper sweeper;
 
+    private final IDatasetDirectoryService datasetDirectoryService;
+
     private long jobCounter;
 
     public ClusterControllerService(final CCConfig ccConfig) throws Exception {
@@ -162,6 +175,7 @@
             }
         };
         sweeper = new DeadNodeSweeper();
+        datasetDirectoryService = new DatasetDirectoryService();
         jobCounter = 0;
     }
 
@@ -264,6 +278,10 @@
         return clusterIPC;
     }
 
+    public NetworkAddress getDatasetDirectoryServiceInfo() {
+        return new NetworkAddress(ccConfig.clientNetIpAddress.getBytes(), ccConfig.clientNetPort);
+    }
+
     private class DeadNodeSweeper extends TimerTask {
         @Override
         public void run() {
@@ -271,6 +289,10 @@
         }
     }
 
+    public IDatasetDirectoryService getDatasetDirectoryService() {
+        return datasetDirectoryService;
+    }
+
     private class HyracksClientInterfaceIPCI implements IIPCI {
         @Override
         public void deliverIncomingMessage(IIPCHandle handle, long mid, long rmid, Object payload, Exception exception) {
@@ -321,6 +343,27 @@
                     return;
                 }
 
+                case GET_DATASET_DIRECTORY_SERIVICE_INFO: {
+                    workQueue.schedule(new GetDatasetDirectoryServiceInfoWork(ClusterControllerService.this,
+                            new IPCResponder<NetworkAddress>(handle, mid)));
+                    return;
+                }
+
+                case GET_DATASET_RESULT_STATUS: {
+                    HyracksClientInterfaceFunctions.GetDatasetResultStatusFunction gdrlf = (HyracksClientInterfaceFunctions.GetDatasetResultStatusFunction) fn;
+                    workQueue.schedule(new GetResultStatusWork(ClusterControllerService.this, gdrlf.getJobId(), gdrlf
+                            .getResultSetId(), new IPCResponder<Status>(handle, mid)));
+                    return;
+                }
+
+                case GET_DATASET_RESULT_LOCATIONS: {
+                    HyracksClientInterfaceFunctions.GetDatasetResultLocationsFunction gdrlf = (HyracksClientInterfaceFunctions.GetDatasetResultLocationsFunction) fn;
+                    workQueue.schedule(new GetResultPartitionLocationsWork(ClusterControllerService.this, gdrlf
+                            .getJobId(), gdrlf.getResultSetId(), gdrlf.getKnownRecords(),
+                            new IPCResponder<DatasetDirectoryRecord[]>(handle, mid)));
+                    return;
+                }
+
                 case WAIT_FOR_COMPLETION: {
                     HyracksClientInterfaceFunctions.WaitForCompletionFunction wfcf = (HyracksClientInterfaceFunctions.WaitForCompletionFunction) fn;
                     workQueue.schedule(new WaitForJobCompletionWork(ClusterControllerService.this, wfcf.getJobId(),
@@ -416,6 +459,28 @@
                     return;
                 }
 
+                case REGISTER_RESULT_PARTITION_LOCATION: {
+                    CCNCFunctions.RegisterResultPartitionLocationFunction rrplf = (CCNCFunctions.RegisterResultPartitionLocationFunction) fn;
+                    workQueue.schedule(new RegisterResultPartitionLocationWork(ClusterControllerService.this, rrplf
+                            .getJobId(), rrplf.getResultSetId(), rrplf.getOrderedResult(), rrplf.getPartition(), rrplf
+                            .getNPartitions(), rrplf.getNetworkAddress()));
+                    return;
+                }
+
+                case REPORT_RESULT_PARTITION_WRITE_COMPLETION: {
+                    CCNCFunctions.ReportResultPartitionWriteCompletionFunction rrplf = (CCNCFunctions.ReportResultPartitionWriteCompletionFunction) fn;
+                    workQueue.schedule(new ReportResultPartitionWriteCompletionWork(ClusterControllerService.this,
+                            rrplf.getJobId(), rrplf.getResultSetId(), rrplf.getPartition()));
+                    return;
+                }
+
+                case REPORT_RESULT_PARTITION_FAILURE: {
+                    CCNCFunctions.ReportResultPartitionFailureFunction rrplf = (CCNCFunctions.ReportResultPartitionFailureFunction) fn;
+                    workQueue.schedule(new ReportResultPartitionFailureWork(ClusterControllerService.this, rrplf
+                            .getJobId(), rrplf.getResultSetId(), rrplf.getPartition()));
+                    return;
+                }
+
                 case APPLICATION_STATE_CHANGE_RESPONSE: {
                     CCNCFunctions.ApplicationStateChangeResponseFunction astrf = (CCNCFunctions.ApplicationStateChangeResponseFunction) fn;
                     workQueue.schedule(new ApplicationStateChangeWork(ClusterControllerService.this, astrf));
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/NodeControllerState.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/NodeControllerState.java
index c17acd0..c96a319 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/NodeControllerState.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/NodeControllerState.java
@@ -41,6 +41,8 @@
 
     private final NetworkAddress dataPort;
 
+    private final NetworkAddress datasetPort;
+
     private final Set<JobId> activeJobIds;
 
     private final String osName;
@@ -107,6 +109,14 @@
 
     private final long[] netSignalingBytesWritten;
 
+    private final long[] datasetNetPayloadBytesRead;
+
+    private final long[] datasetNetPayloadBytesWritten;
+
+    private final long[] datasetNetSignalingBytesRead;
+
+    private final long[] datasetNetSignalingBytesWritten;
+
     private final long[] ipcMessagesSent;
 
     private final long[] ipcMessageBytesSent;
@@ -123,6 +133,7 @@
         this.nodeController = nodeController;
         ncConfig = reg.getNCConfig();
         dataPort = reg.getDataPort();
+        datasetPort = reg.getDatasetPort();
         activeJobIds = new HashSet<JobId>();
 
         osName = reg.getOSName();
@@ -164,6 +175,10 @@
         netPayloadBytesWritten = new long[RRD_SIZE];
         netSignalingBytesRead = new long[RRD_SIZE];
         netSignalingBytesWritten = new long[RRD_SIZE];
+        datasetNetPayloadBytesRead = new long[RRD_SIZE];
+        datasetNetPayloadBytesWritten = new long[RRD_SIZE];
+        datasetNetSignalingBytesRead = new long[RRD_SIZE];
+        datasetNetSignalingBytesWritten = new long[RRD_SIZE];
         ipcMessagesSent = new long[RRD_SIZE];
         ipcMessageBytesSent = new long[RRD_SIZE];
         ipcMessagesReceived = new long[RRD_SIZE];
@@ -196,6 +211,10 @@
         netPayloadBytesWritten[rrdPtr] = hbData.netPayloadBytesWritten;
         netSignalingBytesRead[rrdPtr] = hbData.netSignalingBytesRead;
         netSignalingBytesWritten[rrdPtr] = hbData.netSignalingBytesWritten;
+        datasetNetPayloadBytesRead[rrdPtr] = hbData.datasetNetPayloadBytesRead;
+        datasetNetPayloadBytesWritten[rrdPtr] = hbData.datasetNetPayloadBytesWritten;
+        datasetNetSignalingBytesRead[rrdPtr] = hbData.datasetNetSignalingBytesRead;
+        datasetNetSignalingBytesWritten[rrdPtr] = hbData.datasetNetSignalingBytesWritten;
         ipcMessagesSent[rrdPtr] = hbData.ipcMessagesSent;
         ipcMessageBytesSent[rrdPtr] = hbData.ipcMessageBytesSent;
         ipcMessagesReceived[rrdPtr] = hbData.ipcMessagesReceived;
@@ -227,6 +246,10 @@
         return dataPort;
     }
 
+    public NetworkAddress getDatasetPort() {
+        return datasetPort;
+    }
+
     public JSONObject toSummaryJSON() throws JSONException {
         JSONObject o = new JSONObject();
         o.put("node-id", ncConfig.nodeId);
@@ -271,6 +294,10 @@
         o.put("net-payload-bytes-written", netPayloadBytesWritten);
         o.put("net-signaling-bytes-read", netSignalingBytesRead);
         o.put("net-signaling-bytes-written", netSignalingBytesWritten);
+        o.put("dataset-net-payload-bytes-read", datasetNetPayloadBytesRead);
+        o.put("dataset-net-payload-bytes-written", datasetNetPayloadBytesWritten);
+        o.put("dataset-net-signaling-bytes-read", datasetNetSignalingBytesRead);
+        o.put("dataset-net-signaling-bytes-written", datasetNetSignalingBytesWritten);
         o.put("ipc-messages-sent", ipcMessagesSent);
         o.put("ipc-message-bytes-sent", ipcMessageBytesSent);
         o.put("ipc-messages-received", ipcMessagesReceived);
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/dataset/DatasetDirectoryService.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/dataset/DatasetDirectoryService.java
new file mode 100644
index 0000000..13d0c30
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/dataset/DatasetDirectoryService.java
@@ -0,0 +1,241 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.control.cc.dataset;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord;
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord.Status;
+import edu.uci.ics.hyracks.api.dataset.IDatasetDirectoryService;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.job.JobId;
+
+/**
+ * TODO(madhusudancs): The potential perils of this global dataset directory service implementation is that, the jobs
+ * location information is never evicted from the memory and the memory usage grows as the number of jobs in the system
+ * grows. What we should possibly do is, add an API call for the client to say that it received everything it has to for
+ * the job (after it receives all the results) completely. Then we can just get rid of the location information for that
+ * job.
+ */
+public class DatasetDirectoryService implements IDatasetDirectoryService {
+    private final Map<JobId, Map<ResultSetId, ResultSetMetaData>> jobResultLocationsMap;
+
+    public DatasetDirectoryService() {
+        jobResultLocationsMap = new HashMap<JobId, Map<ResultSetId, ResultSetMetaData>>();
+    }
+
+    @Override
+    public synchronized void registerResultPartitionLocation(JobId jobId, ResultSetId rsId, boolean orderedResult,
+            int partition, int nPartitions, NetworkAddress networkAddress) {
+        Map<ResultSetId, ResultSetMetaData> rsMap = jobResultLocationsMap.get(jobId);
+        if (rsMap == null) {
+            rsMap = new HashMap<ResultSetId, ResultSetMetaData>();
+            jobResultLocationsMap.put(jobId, rsMap);
+        }
+
+        ResultSetMetaData resultSetMetaData = rsMap.get(rsId);
+        if (resultSetMetaData == null) {
+            resultSetMetaData = new ResultSetMetaData(orderedResult, new DatasetDirectoryRecord[nPartitions]);
+            rsMap.put(rsId, resultSetMetaData);
+        }
+
+        DatasetDirectoryRecord[] records = resultSetMetaData.getRecords();
+        if (records[partition] == null) {
+            records[partition] = new DatasetDirectoryRecord();
+        }
+        records[partition].setNetworkAddress(networkAddress);
+        records[partition].start();
+        notifyAll();
+    }
+
+    @Override
+    public synchronized void reportResultPartitionWriteCompletion(JobId jobId, ResultSetId rsId, int partition) {
+        DatasetDirectoryRecord ddr = getDatasetDirectoryRecord(jobId, rsId, partition);
+        ddr.writeEOS();
+    }
+
+    @Override
+    public synchronized void reportResultPartitionFailure(JobId jobId, ResultSetId rsId, int partition) {
+        DatasetDirectoryRecord ddr = getDatasetDirectoryRecord(jobId, rsId, partition);
+        ddr.fail();
+    }
+
+    @Override
+    public synchronized Status getResultStatus(JobId jobId, ResultSetId rsId) throws HyracksDataException {
+        Map<ResultSetId, ResultSetMetaData> rsMap;
+        while ((rsMap = jobResultLocationsMap.get(jobId)) == null) {
+            try {
+                wait();
+            } catch (InterruptedException e) {
+                throw new HyracksDataException(e);
+            }
+        }
+
+        ResultSetMetaData resultSetMetaData = rsMap.get(rsId);
+        if (resultSetMetaData == null || resultSetMetaData.getRecords() == null) {
+            throw new HyracksDataException("ResultSet locations uninitialized when it is expected to be initialized.");
+        }
+        DatasetDirectoryRecord[] records = resultSetMetaData.getRecords();
+
+        ArrayList<Status> statuses = new ArrayList<Status>(records.length);
+        for (int i = 0; i < records.length; i++) {
+            statuses.add(records[i].getStatus());
+        }
+
+        // Default status is idle
+        Status status = Status.IDLE;
+        if (statuses.contains(Status.FAILED)) {
+            // Even if there is at least one failed entry we should return failed status.
+            return Status.FAILED;
+        } else if (statuses.contains(Status.RUNNING)) {
+            // If there are not failed entry and if there is at least one running entry we should return running status.
+            return Status.RUNNING;
+        } else {
+            // If each and every partition has reported success do we report success as the status.
+            int successCount = 0;
+            for (int i = 0; i < statuses.size(); i++) {
+                if (statuses.get(i) == Status.SUCCESS) {
+                    successCount++;
+                }
+            }
+            if (successCount == statuses.size()) {
+                return Status.SUCCESS;
+            }
+        }
+        return status;
+    }
+
+    @Override
+    public synchronized DatasetDirectoryRecord[] getResultPartitionLocations(JobId jobId, ResultSetId rsId,
+            DatasetDirectoryRecord[] knownRecords) throws HyracksDataException {
+        DatasetDirectoryRecord[] newRecords;
+        while ((newRecords = updatedRecords(jobId, rsId, knownRecords)) == null) {
+            try {
+                wait();
+            } catch (InterruptedException e) {
+                throw new HyracksDataException(e);
+            }
+        }
+        return newRecords;
+    }
+
+    public DatasetDirectoryRecord getDatasetDirectoryRecord(JobId jobId, ResultSetId rsId, int partition) {
+        Map<ResultSetId, ResultSetMetaData> rsMap = jobResultLocationsMap.get(jobId);
+        ResultSetMetaData resultSetMetaData = rsMap.get(rsId);
+        DatasetDirectoryRecord[] records = resultSetMetaData.getRecords();
+        return records[partition];
+    }
+
+    /**
+     * Compares the records already known by the client for the given job's result set id with the records that the
+     * dataset directory service knows and if there are any newly discovered records returns a whole array with the
+     * new records filled in.
+     * This method has a very convoluted logic. Here is the explanation of how it works.
+     * If the ordering constraint has to be enforced, the method obtains the first null record in the known records in
+     * the order of the partitions. It always traverses the array in the first to last order!
+     * If known records array or the first element in that array is null in the but the record for that partition now
+     * known to the directory service, the method fills in that record in the array and returns the array back.
+     * However, if the first known null record is not a first element in the array, by induction, all the previous
+     * known records should be known already be known to client and none of the records for the partitions ahead is
+     * known by the client yet. So, we check if the client has reached the end of stream for the partition corresponding
+     * to the record before the first known null record, i.e. the last known non-null record. If not, we just return
+     * null because we cannot expose any new locations until the client reaches end of stream for the last known record.
+     * If the client has reached the end of stream record for the last known non-null record, we check if the next record
+     * is discovered by the dataset directory service and if so, we fill it in the records array and return it back or
+     * send null otherwise.
+     * If the ordering is not required, we are free to return any newly discovered records back, so we just check if
+     * arrays are equal and if they are not we send the entire new updated array.
+     * 
+     * @param jobId
+     *            - Id of the job for which the directory records should be retrieved.
+     * @param rsId
+     *            - Id of the result set for which the directory records should be retrieved.
+     * @param knownRecords
+     *            - An array of directory records that the client is already aware of.
+     * @return
+     *         - Returns null if there aren't any newly discovered partitions enforcing the ordering constraint
+     * @throws HyracksDataException
+     *             TODO(madhusudancs): Think about caching (and still be stateless) instead of this ugly O(n) iterations for
+     *             every check. This already looks very expensive.
+     */
+    private DatasetDirectoryRecord[] updatedRecords(JobId jobId, ResultSetId rsId, DatasetDirectoryRecord[] knownRecords)
+            throws HyracksDataException {
+        Map<ResultSetId, ResultSetMetaData> rsMap = jobResultLocationsMap.get(jobId);
+        if (rsMap == null) {
+            return null;
+        }
+
+        ResultSetMetaData resultSetMetaData = rsMap.get(rsId);
+        if (resultSetMetaData == null || resultSetMetaData.getRecords() == null) {
+            throw new HyracksDataException("ResultSet locations uninitialized when it is expected to be initialized.");
+        }
+
+        boolean ordered = resultSetMetaData.getOrderedResult();
+        DatasetDirectoryRecord[] records = resultSetMetaData.getRecords();
+        /* If ordering is required, we should expose the dataset directory records only in the order, otherwise
+         * we can simply check if there are any newly discovered records and send the whole array back if there are.
+         */
+        if (ordered) {
+            // Iterate over the known records and find the last record which is not null.
+            int i = 0;
+            for (i = 0; i < records.length; i++) {
+                if (knownRecords == null) {
+                    if (records[0] != null) {
+                        knownRecords = new DatasetDirectoryRecord[records.length];
+                        knownRecords[0] = records[0];
+                        return knownRecords;
+                    }
+                    return null;
+                }
+                if (knownRecords[i] == null) {
+                    if ((i == 0 || knownRecords[i - 1].hasReachedReadEOS()) && records[i] != null) {
+                        knownRecords[i] = records[i];
+                        return knownRecords;
+                    }
+                    return null;
+                }
+            }
+        } else {
+            if (!Arrays.equals(records, knownRecords)) {
+                return records;
+            }
+        }
+        return null;
+    }
+
+    private class ResultSetMetaData {
+        private final boolean ordered;
+
+        private final DatasetDirectoryRecord[] records;
+
+        public ResultSetMetaData(boolean ordered, DatasetDirectoryRecord[] records) {
+            this.ordered = ordered;
+            this.records = records;
+        }
+
+        public boolean getOrderedResult() {
+            return ordered;
+        }
+
+        public DatasetDirectoryRecord[] getRecords() {
+            return records;
+        }
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetDatasetDirectoryServiceInfoWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetDatasetDirectoryServiceInfoWork.java
new file mode 100644
index 0000000..3ac6acc
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetDatasetDirectoryServiceInfoWork.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.control.cc.work;
+
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
+import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
+import edu.uci.ics.hyracks.control.common.work.IResultCallback;
+import edu.uci.ics.hyracks.control.common.work.SynchronizableWork;
+
+public class GetDatasetDirectoryServiceInfoWork extends SynchronizableWork {
+    private final ClusterControllerService ccs;
+
+    private final IResultCallback<NetworkAddress> callback;
+
+    public GetDatasetDirectoryServiceInfoWork(ClusterControllerService ccs, IResultCallback<NetworkAddress> callback) {
+        this.ccs = ccs;
+        this.callback = callback;
+    }
+
+    @Override
+    public void doRun() {
+        try {
+            NetworkAddress addr = ccs.getDatasetDirectoryServiceInfo();
+            callback.setValue(addr);
+        } catch (Exception e) {
+            callback.setException(e);
+        }
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetNodeControllersInfoWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetNodeControllersInfoWork.java
index 2f23a2c..a787b9f 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetNodeControllersInfoWork.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetNodeControllersInfoWork.java
@@ -39,7 +39,8 @@
         Map<String, NodeControllerInfo> result = new LinkedHashMap<String, NodeControllerInfo>();
         Map<String, NodeControllerState> nodeMap = ccs.getNodeMap();
         for (Map.Entry<String, NodeControllerState> e : nodeMap.entrySet()) {
-            result.put(e.getKey(), new NodeControllerInfo(e.getKey(), NodeStatus.ALIVE, e.getValue().getDataPort()));
+            result.put(e.getKey(), new NodeControllerInfo(e.getKey(), NodeStatus.ALIVE, e.getValue().getDataPort(), e
+                    .getValue().getDatasetPort()));
         }
         callback.setValue(result);
     }
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetResultPartitionLocationsWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetResultPartitionLocationsWork.java
new file mode 100644
index 0000000..fd1d418
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetResultPartitionLocationsWork.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.control.cc.work;
+
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord;
+import edu.uci.ics.hyracks.api.dataset.IDatasetDirectoryService;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.job.JobId;
+import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
+import edu.uci.ics.hyracks.control.common.work.IResultCallback;
+import edu.uci.ics.hyracks.control.common.work.SynchronizableWork;
+
+public class GetResultPartitionLocationsWork extends SynchronizableWork {
+    private final ClusterControllerService ccs;
+
+    private final JobId jobId;
+
+    private final ResultSetId rsId;
+
+    private final DatasetDirectoryRecord[] knownRecords;
+
+    private final IResultCallback<DatasetDirectoryRecord[]> callback;
+
+    public GetResultPartitionLocationsWork(ClusterControllerService ccs, JobId jobId, ResultSetId rsId,
+            DatasetDirectoryRecord[] knownRecords, IResultCallback<DatasetDirectoryRecord[]> callback) {
+        this.ccs = ccs;
+        this.jobId = jobId;
+        this.rsId = rsId;
+        this.knownRecords = knownRecords;
+        this.callback = callback;
+    }
+
+    @Override
+    public void doRun() {
+        final IDatasetDirectoryService dds = ccs.getDatasetDirectoryService();
+        ccs.getExecutor().execute(new Runnable() {
+            @Override
+            public void run() {
+                try {
+                    DatasetDirectoryRecord[] partitionLocations = dds.getResultPartitionLocations(jobId, rsId,
+                            knownRecords);
+                    callback.setValue(partitionLocations);
+                } catch (HyracksDataException e) {
+                    callback.setException(e);
+                }
+            }
+        });
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetResultStatusWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetResultStatusWork.java
new file mode 100644
index 0000000..d2dadf5
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/GetResultStatusWork.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.control.cc.work;
+
+import edu.uci.ics.hyracks.api.dataset.DatasetDirectoryRecord.Status;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.job.JobId;
+import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
+import edu.uci.ics.hyracks.control.common.work.IResultCallback;
+import edu.uci.ics.hyracks.control.common.work.SynchronizableWork;
+
+public class GetResultStatusWork extends SynchronizableWork {
+    private final ClusterControllerService ccs;
+
+    private final JobId jobId;
+
+    private final ResultSetId rsId;
+
+    private final IResultCallback<Status> callback;
+
+    public GetResultStatusWork(ClusterControllerService ccs, JobId jobId, ResultSetId rsId,
+            IResultCallback<Status> callback) {
+        this.ccs = ccs;
+        this.jobId = jobId;
+        this.rsId = rsId;
+        this.callback = callback;
+    }
+
+    @Override
+    public void doRun() {
+        try {
+            Status status = ccs.getDatasetDirectoryService().getResultStatus(jobId, rsId);
+            callback.setValue(status);
+        } catch (HyracksDataException e) {
+            callback.setException(e);
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "JobId@" + jobId + " ResultSetId@" + rsId;
+    }
+}
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobStartWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobStartWork.java
index b6a33cd..b062d33 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobStartWork.java
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/JobStartWork.java
@@ -16,6 +16,7 @@
 
 import java.util.EnumSet;
 
+import edu.uci.ics.hyracks.api.dataset.IDatasetDirectoryService;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.api.job.IActivityClusterGraphGenerator;
 import edu.uci.ics.hyracks.api.job.IActivityClusterGraphGeneratorFactory;
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/RegisterResultPartitionLocationWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/RegisterResultPartitionLocationWork.java
new file mode 100644
index 0000000..f86e924
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/RegisterResultPartitionLocationWork.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.control.cc.work;
+
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.job.JobId;
+import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
+import edu.uci.ics.hyracks.control.common.work.AbstractWork;
+
+public class RegisterResultPartitionLocationWork extends AbstractWork {
+    private final ClusterControllerService ccs;
+
+    private final JobId jobId;
+
+    private final ResultSetId rsId;
+
+    private final boolean orderedResult;
+
+    private final int partition;
+
+    private final int nPartitions;
+
+    private final NetworkAddress networkAddress;
+
+    public RegisterResultPartitionLocationWork(ClusterControllerService ccs, JobId jobId, ResultSetId rsId,
+            boolean orderedResult, int partition, int nPartitions, NetworkAddress networkAddress) {
+        this.ccs = ccs;
+        this.jobId = jobId;
+        this.rsId = rsId;
+        this.orderedResult = orderedResult;
+        this.partition = partition;
+        this.nPartitions = nPartitions;
+        this.networkAddress = networkAddress;
+    }
+
+    @Override
+    public void run() {
+        ccs.getDatasetDirectoryService().registerResultPartitionLocation(jobId, rsId, orderedResult, partition,
+                nPartitions, networkAddress);
+    }
+
+    @Override
+    public String toString() {
+        return "JobId@" + jobId + " ResultSetId@" + rsId + " Partition@" + partition + " NPartitions@" + nPartitions
+                + " ResultPartitionLocation@" + networkAddress + " OrderedResult@" + orderedResult;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ReportResultPartitionFailureWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ReportResultPartitionFailureWork.java
new file mode 100644
index 0000000..4aea41e
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ReportResultPartitionFailureWork.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.control.cc.work;
+
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.job.JobId;
+import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
+import edu.uci.ics.hyracks.control.common.work.AbstractWork;
+
+public class ReportResultPartitionFailureWork extends AbstractWork {
+    private final ClusterControllerService ccs;
+
+    private final JobId jobId;
+
+    private final ResultSetId rsId;
+
+    private final int partition;
+
+    public ReportResultPartitionFailureWork(ClusterControllerService ccs, JobId jobId, ResultSetId rsId, int partition) {
+        this.ccs = ccs;
+        this.jobId = jobId;
+        this.rsId = rsId;
+        this.partition = partition;
+    }
+
+    @Override
+    public void run() {
+        ccs.getDatasetDirectoryService().reportResultPartitionFailure(jobId, rsId, partition);
+    }
+
+    @Override
+    public String toString() {
+        return "JobId@" + jobId + " ResultSetId@" + rsId + " Partition@" + partition;
+    }
+}
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ReportResultPartitionWriteCompletionWork.java b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ReportResultPartitionWriteCompletionWork.java
new file mode 100644
index 0000000..313b730
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/work/ReportResultPartitionWriteCompletionWork.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.control.cc.work;
+
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.job.JobId;
+import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
+import edu.uci.ics.hyracks.control.common.work.AbstractWork;
+
+public class ReportResultPartitionWriteCompletionWork extends AbstractWork {
+    private final ClusterControllerService ccs;
+
+    private final JobId jobId;
+
+    private final ResultSetId rsId;
+
+    private final int partition;
+
+    public ReportResultPartitionWriteCompletionWork(ClusterControllerService ccs, JobId jobId, ResultSetId rsId,
+            int partition) {
+        this.ccs = ccs;
+        this.jobId = jobId;
+        this.rsId = rsId;
+        this.partition = partition;
+    }
+
+    @Override
+    public void run() {
+        ccs.getDatasetDirectoryService().reportResultPartitionWriteCompletion(jobId, rsId, partition);
+    }
+
+    @Override
+    public String toString() {
+        return "JobId@" + jobId + " ResultSetId@" + rsId + " Partition@" + partition;
+    }
+}
diff --git a/hyracks/hyracks-control/hyracks-control-cc/src/main/resources/static/javascript/adminconsole/NodeDetailsPage.js b/hyracks/hyracks-control/hyracks-control-cc/src/main/resources/static/javascript/adminconsole/NodeDetailsPage.js
index ff9d8a0..8e94269 100644
--- a/hyracks/hyracks-control/hyracks-control-cc/src/main/resources/static/javascript/adminconsole/NodeDetailsPage.js
+++ b/hyracks/hyracks-control/hyracks-control-cc/src/main/resources/static/javascript/adminconsole/NodeDetailsPage.js
@@ -58,6 +58,10 @@
         var netPayloadBytesWritten = result['net-payload-bytes-written'];
         var netSignalingBytesRead = result['net-signaling-bytes-read'];
         var netSignalingBytesWritten = result['net-signaling-bytes-written'];
+        var datasetNetPayloadBytesRead = result['dataset-net-payload-bytes-read'];
+        var datasetNetPayloadBytesWritten = result['dataset-net-payload-bytes-written'];
+        var datasetNetSignalingBytesRead = result['dataset-net-signaling-bytes-read'];
+        var datasetNetSignalingBytesWritten = result['dataset-net-signaling-bytes-written'];
         var ipcMessagesSent = result['ipc-messages-sent'];
         var ipcMessageBytesSent = result['ipc-message-bytes-sent'];
         var ipcMessagesReceived = result['ipc-messages-received'];
@@ -117,8 +121,12 @@
             }
             if (i < sysLoad.length - 1) {
                 netPayloadReadBWArray.push([ i, computeRate(netPayloadBytesRead, rrdPtr) ]);
+                netPayloadReadBWArray.push([ i, computeRate(datasetNetPayloadBytesRead, rrdPtr) ]);
                 netPayloadWriteBWArray.push([ i, computeRate(netPayloadBytesWritten, rrdPtr) ]);
+                netPayloadWriteBWArray.push([ i, computeRate(datasetNetPayloadBytesWritten, rrdPtr) ]);
                 netSignalingReadBWArray.push([ i, computeRate(netSignalingBytesRead, rrdPtr) ]);
+                netSignalingReadBWArray.push([ i, computeRate(datasetNetSignalingBytesRead, rrdPtr) ]);
+                netSignalingWriteBWArray.push([ i, computeRate(netSignalingBytesWritten, rrdPtr) ]);
                 netSignalingWriteBWArray.push([ i, computeRate(netSignalingBytesWritten, rrdPtr) ]);
                 ipcMessageSendRateArray.push([ i, computeRate(ipcMessagesSent, rrdPtr) ]);
                 ipcMessageBytesSendRateArray.push([ i, computeRate(ipcMessageBytesSent, rrdPtr) ]);
@@ -229,4 +237,4 @@
     }
 
     fetchData();
-});
\ No newline at end of file
+});
diff --git a/hyracks/hyracks-control/hyracks-control-common/pom.xml b/hyracks/hyracks-control/hyracks-control-common/pom.xml
index ce1298e..75fe3c9 100644
--- a/hyracks/hyracks-control/hyracks-control-common/pom.xml
+++ b/hyracks/hyracks-control/hyracks-control-common/pom.xml
@@ -3,12 +3,12 @@
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-control-common</artifactId>
   <name>hyracks-control-common</name>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-control</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -29,7 +29,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/base/IClusterController.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/base/IClusterController.java
index 0c5bb2f..55e4479 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/base/IClusterController.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/base/IClusterController.java
@@ -16,7 +16,9 @@
 
 import java.util.List;
 
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.control.common.application.ApplicationStatus;
 import edu.uci.ics.hyracks.control.common.controllers.NodeRegistration;
@@ -46,6 +48,13 @@
 
     public void registerPartitionRequest(PartitionRequest partitionRequest) throws Exception;
 
+    public void registerResultPartitionLocation(JobId jobId, ResultSetId rsId, boolean orderedResult, int partition,
+            int nPartitions, NetworkAddress networkAddress) throws Exception;
+
+    public void reportResultPartitionWriteCompletion(JobId jobId, ResultSetId rsId, int partition) throws Exception;
+
+    public void reportResultPartitionFailure(JobId jobId, ResultSetId rsId, int partition) throws Exception;
+
     public void notifyApplicationStateChange(String nodeId, String appName, ApplicationStatus status) throws Exception;
 
     public void sendApplicationMessageToCC(byte[] data, String appName, String nodeId) throws Exception;
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NCConfig.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NCConfig.java
index 167eb4b..5071bc9 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NCConfig.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NCConfig.java
@@ -37,6 +37,9 @@
     @Option(name = "-data-ip-address", usage = "IP Address to bind data listener", required = true)
     public String dataIPAddress;
 
+    @Option(name = "-result-ip-address", usage = "IP Address to bind dataset result distribution listener", required = true)
+    public String datasetIPAddress;
+
     @Option(name = "-iodevices", usage = "Comma separated list of IO Device mount points (default: One device in default temp folder)", required = false)
     public String ioDevices = System.getProperty("java.io.tmpdir");
 
@@ -55,6 +58,9 @@
     @Option(name = "-max-memory", usage = "Maximum memory usable at this Node Controller in bytes (default: -1 auto)")
     public int maxMemory = -1;
 
+    @Option(name = "-result-manager-memory", usage = "Memory usable for result caching at this Node Controller in bytes (default: -1 auto)")
+    public int resultManagerMemory = -1;
+
     public void toCommandLine(List<String> cList) {
         cList.add("-cc-host");
         cList.add(ccHost);
@@ -66,6 +72,7 @@
         cList.add(nodeId);
         cList.add("-data-ip-address");
         cList.add(dataIPAddress);
+        cList.add(datasetIPAddress);
         cList.add("-iodevices");
         cList.add(ioDevices);
         cList.add("-dcache-client-servers");
@@ -80,5 +87,7 @@
         cList.add(String.valueOf(nNetThreads));
         cList.add("-max-memory");
         cList.add(String.valueOf(maxMemory));
+        cList.add("-result-manager-memory");
+        cList.add(String.valueOf(resultManagerMemory));
     }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NodeRegistration.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NodeRegistration.java
index 91cfecf..a897602 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NodeRegistration.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/controllers/NodeRegistration.java
@@ -33,6 +33,8 @@
 
     private final NetworkAddress dataPort;
 
+    private final NetworkAddress datasetPort;
+
     private final String osName;
 
     private final String arch;
@@ -60,13 +62,14 @@
     private final HeartbeatSchema hbSchema;
 
     public NodeRegistration(InetSocketAddress ncAddress, String nodeId, NCConfig ncConfig, NetworkAddress dataPort,
-            String osName, String arch, String osVersion, int nProcessors, String vmName, String vmVersion,
-            String vmVendor, String classpath, String libraryPath, String bootClasspath, List<String> inputArguments,
-            Map<String, String> systemProperties, HeartbeatSchema hbSchema) {
+            NetworkAddress datasetPort, String osName, String arch, String osVersion, int nProcessors, String vmName,
+            String vmVersion, String vmVendor, String classpath, String libraryPath, String bootClasspath,
+            List<String> inputArguments, Map<String, String> systemProperties, HeartbeatSchema hbSchema) {
         this.ncAddress = ncAddress;
         this.nodeId = nodeId;
         this.ncConfig = ncConfig;
         this.dataPort = dataPort;
+        this.datasetPort = datasetPort;
         this.osName = osName;
         this.arch = arch;
         this.osVersion = osVersion;
@@ -98,6 +101,10 @@
         return dataPort;
     }
 
+    public NetworkAddress getDatasetPort() {
+        return datasetPort;
+    }
+
     public String getOSName() {
         return osName;
     }
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/heartbeat/HeartbeatData.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/heartbeat/HeartbeatData.java
index 1dba3bc..663c68a 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/heartbeat/HeartbeatData.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/heartbeat/HeartbeatData.java
@@ -37,6 +37,10 @@
     public long netPayloadBytesWritten;
     public long netSignalingBytesRead;
     public long netSignalingBytesWritten;
+    public long datasetNetPayloadBytesRead;
+    public long datasetNetPayloadBytesWritten;
+    public long datasetNetSignalingBytesRead;
+    public long datasetNetSignalingBytesWritten;
     public long ipcMessagesSent;
     public long ipcMessageBytesSent;
     public long ipcMessagesReceived;
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/CCNCFunctions.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/CCNCFunctions.java
index 557a8cb..b506b12 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/CCNCFunctions.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/CCNCFunctions.java
@@ -36,6 +36,7 @@
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
 import edu.uci.ics.hyracks.api.dataflow.TaskId;
 import edu.uci.ics.hyracks.api.dataflow.connectors.IConnectorPolicy;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.job.JobStatus;
@@ -68,6 +69,9 @@
         REPORT_PROFILE,
         REGISTER_PARTITION_PROVIDER,
         REGISTER_PARTITION_REQUEST,
+        REGISTER_RESULT_PARTITION_LOCATION,
+        REPORT_RESULT_PARTITION_WRITE_COMPLETION,
+        REPORT_RESULT_PARTITION_FAILURE,
         APPLICATION_STATE_CHANGE_RESPONSE,
 
         NODE_REGISTRATION_RESULT,
@@ -438,6 +442,127 @@
         }
     }
 
+    public static class RegisterResultPartitionLocationFunction extends Function {
+        private static final long serialVersionUID = 1L;
+
+        private final JobId jobId;
+
+        private final ResultSetId rsId;
+
+        private final boolean orderedResult;
+
+        private final int partition;
+
+        private final int nPartitions;
+
+        private NetworkAddress networkAddress;
+
+        public RegisterResultPartitionLocationFunction(JobId jobId, ResultSetId rsId, boolean orderedResult,
+                int partition, int nPartitions, NetworkAddress networkAddress) {
+            this.jobId = jobId;
+            this.rsId = rsId;
+            this.orderedResult = orderedResult;
+            this.partition = partition;
+            this.nPartitions = nPartitions;
+            this.networkAddress = networkAddress;
+        }
+
+        @Override
+        public FunctionId getFunctionId() {
+            return FunctionId.REGISTER_RESULT_PARTITION_LOCATION;
+        }
+
+        public JobId getJobId() {
+            return jobId;
+        }
+
+        public ResultSetId getResultSetId() {
+            return rsId;
+        }
+
+        public boolean getOrderedResult() {
+            return orderedResult;
+        }
+
+        public int getPartition() {
+            return partition;
+        }
+
+        public int getNPartitions() {
+            return nPartitions;
+        }
+
+        public NetworkAddress getNetworkAddress() {
+            return networkAddress;
+        }
+    }
+
+    public static class ReportResultPartitionWriteCompletionFunction extends Function {
+        private static final long serialVersionUID = 1L;
+
+        private final JobId jobId;
+
+        private final ResultSetId rsId;
+
+        private final int partition;
+
+        public ReportResultPartitionWriteCompletionFunction(JobId jobId, ResultSetId rsId, int partition) {
+            this.jobId = jobId;
+            this.rsId = rsId;
+            this.partition = partition;
+        }
+
+        @Override
+        public FunctionId getFunctionId() {
+            return FunctionId.REPORT_RESULT_PARTITION_WRITE_COMPLETION;
+        }
+
+        public JobId getJobId() {
+            return jobId;
+        }
+
+        public ResultSetId getResultSetId() {
+            return rsId;
+        }
+
+        public int getPartition() {
+            return partition;
+        }
+    }
+
+    public static class ReportResultPartitionFailureFunction extends Function {
+        private static final long serialVersionUID = 1L;
+
+        private final JobId jobId;
+
+        private final ResultSetId rsId;
+
+        private final int partition;
+
+        public ReportResultPartitionFailureFunction(JobId jobId, ResultSetId rsId, int partition) {
+            this.jobId = jobId;
+            this.rsId = rsId;
+            this.partition = partition;
+        }
+
+        @Override
+        public FunctionId getFunctionId() {
+            return FunctionId.REPORT_RESULT_PARTITION_FAILURE;
+        }
+
+        public JobId getJobId() {
+            return jobId;
+        }
+
+        public ResultSetId getResultSetId() {
+            return rsId;
+        }
+
+        public int getPartition() {
+            return partition;
+        }
+    }
+
     public static class ApplicationStateChangeResponseFunction extends Function {
         private static final long serialVersionUID = 1L;
 
diff --git a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/ClusterControllerRemoteProxy.java b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/ClusterControllerRemoteProxy.java
index bbaab4e..091a5d2 100644
--- a/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/ClusterControllerRemoteProxy.java
+++ b/hyracks/hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/ipc/ClusterControllerRemoteProxy.java
@@ -16,7 +16,9 @@
 
 import java.util.List;
 
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.control.common.application.ApplicationStatus;
 import edu.uci.ics.hyracks.control.common.base.IClusterController;
@@ -95,6 +97,28 @@
     }
 
     @Override
+    public void registerResultPartitionLocation(JobId jobId, ResultSetId rsId, boolean orderedResult, int partition,
+            int nPartitions, NetworkAddress networkAddress) throws Exception {
+        CCNCFunctions.RegisterResultPartitionLocationFunction fn = new CCNCFunctions.RegisterResultPartitionLocationFunction(
+                jobId, rsId, orderedResult, partition, nPartitions, networkAddress);
+        ipcHandle.send(-1, fn, null);
+    }
+
+    @Override
+    public void reportResultPartitionWriteCompletion(JobId jobId, ResultSetId rsId, int partition) throws Exception {
+        CCNCFunctions.ReportResultPartitionWriteCompletionFunction fn = new CCNCFunctions.ReportResultPartitionWriteCompletionFunction(
+                jobId, rsId, partition);
+        ipcHandle.send(-1, fn, null);
+    }
+
+    @Override
+    public void reportResultPartitionFailure(JobId jobId, ResultSetId rsId, int partition) throws Exception {
+        CCNCFunctions.ReportResultPartitionFailureFunction fn = new CCNCFunctions.ReportResultPartitionFailureFunction(
+                jobId, rsId, partition);
+        ipcHandle.send(-1, fn, null);
+    }
+
+    @Override
     public void notifyApplicationStateChange(String nodeId, String appName, ApplicationStatus status) throws Exception {
         CCNCFunctions.ApplicationStateChangeResponseFunction fn = new CCNCFunctions.ApplicationStateChangeResponseFunction(
                 nodeId, appName, status);
diff --git a/hyracks/hyracks-control/hyracks-control-nc/pom.xml b/hyracks/hyracks-control/hyracks-control-nc/pom.xml
index 6a7e5d8..b6eff7a 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/pom.xml
+++ b/hyracks/hyracks-control/hyracks-control-nc/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-control</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -32,14 +32,19 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-net</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-comm</artifactId>
+  		<version>0.2.4-SNAPSHOT</version>
   	</dependency>
   </dependencies>
   <reporting>
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 0195143..8a36dac 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
@@ -45,6 +45,7 @@
 
 import edu.uci.ics.hyracks.api.client.NodeControllerInfo;
 import edu.uci.ics.hyracks.api.context.IHyracksRootContext;
+import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionManager;
 import edu.uci.ics.hyracks.api.io.IODeviceHandle;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.control.common.AbstractRemoteService;
@@ -61,7 +62,9 @@
 import edu.uci.ics.hyracks.control.common.work.FutureValue;
 import edu.uci.ics.hyracks.control.common.work.WorkQueue;
 import edu.uci.ics.hyracks.control.nc.application.NCApplicationContext;
+import edu.uci.ics.hyracks.control.nc.dataset.DatasetPartitionManager;
 import edu.uci.ics.hyracks.control.nc.io.IOManager;
+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.runtime.RootHyracksContext;
@@ -94,6 +97,10 @@
 
     private final NetworkManager netManager;
 
+    private final IDatasetPartitionManager datasetPartitionManager;
+
+    private final DatasetNetworkManager datasetNetworkManager;
+
     private final WorkQueue queue;
 
     private final Timer timer;
@@ -140,7 +147,11 @@
             throw new Exception("id not set");
         }
         partitionManager = new PartitionManager(this);
-        netManager = new NetworkManager(getIpAddress(ncConfig), partitionManager, ncConfig.nNetThreads);
+        netManager = new NetworkManager(getIpAddress(ncConfig.dataIPAddress), partitionManager, ncConfig.nNetThreads);
+
+        datasetPartitionManager = new DatasetPartitionManager(this, executor, ncConfig.resultManagerMemory);
+        datasetNetworkManager = new DatasetNetworkManager(getIpAddress(ncConfig.datasetIPAddress),
+                datasetPartitionManager, ncConfig.nNetThreads);
 
         queue = new WorkQueue();
         jobletMap = new Hashtable<JobId, Joblet>();
@@ -205,6 +216,7 @@
         LOGGER.log(Level.INFO, "Starting NodeControllerService");
         ipc.start();
         netManager.start();
+        datasetNetworkManager.start();
         IIPCHandle ccIPCHandle = ipc.getHandle(new InetSocketAddress(ncConfig.ccHost, ncConfig.ccPort));
         this.ccs = new ClusterControllerRemoteProxy(ccIPCHandle);
         HeartbeatSchema.GarbageCollectorInfo[] gcInfos = new HeartbeatSchema.GarbageCollectorInfo[gcMXBeans.size()];
@@ -213,10 +225,11 @@
         }
         HeartbeatSchema hbSchema = new HeartbeatSchema(gcInfos);
         ccs.registerNode(new NodeRegistration(ipc.getSocketAddress(), id, ncConfig, netManager.getNetworkAddress(),
-                osMXBean.getName(), osMXBean.getArch(), osMXBean.getVersion(), osMXBean.getAvailableProcessors(),
-                runtimeMXBean.getVmName(), runtimeMXBean.getVmVersion(), runtimeMXBean.getVmVendor(), runtimeMXBean
-                        .getClassPath(), runtimeMXBean.getLibraryPath(), runtimeMXBean.getBootClassPath(),
-                runtimeMXBean.getInputArguments(), runtimeMXBean.getSystemProperties(), hbSchema));
+                datasetNetworkManager.getNetworkAddress(), osMXBean.getName(), osMXBean.getArch(), osMXBean
+                        .getVersion(), osMXBean.getAvailableProcessors(), runtimeMXBean.getVmName(), runtimeMXBean
+                        .getVmVersion(), runtimeMXBean.getVmVendor(), runtimeMXBean.getClassPath(), runtimeMXBean
+                        .getLibraryPath(), runtimeMXBean.getBootClassPath(), runtimeMXBean.getInputArguments(),
+                runtimeMXBean.getSystemProperties(), hbSchema));
 
         synchronized (this) {
             while (registrationPending) {
@@ -247,8 +260,10 @@
         LOGGER.log(Level.INFO, "Stopping NodeControllerService");
         executor.shutdownNow();
         partitionManager.close();
+        datasetPartitionManager.close();
         heartbeatTask.cancel();
         netManager.stop();
+        datasetNetworkManager.stop();
         queue.stop();
         LOGGER.log(Level.INFO, "Stopped NodeControllerService");
     }
@@ -273,6 +288,10 @@
         return netManager;
     }
 
+    public DatasetNetworkManager getDatasetNetworkManager() {
+        return datasetNetworkManager;
+    }
+
     public PartitionManager getPartitionManager() {
         return partitionManager;
     }
@@ -297,8 +316,7 @@
         return queue;
     }
 
-    private static InetAddress getIpAddress(NCConfig ncConfig) throws Exception {
-        String ipaddrStr = ncConfig.dataIPAddress;
+    private static InetAddress getIpAddress(String ipaddrStr) throws Exception {
         ipaddrStr = ipaddrStr.trim();
         Pattern pattern = Pattern.compile("(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})");
         Matcher m = pattern.matcher(ipaddrStr);
@@ -355,6 +373,12 @@
             hbData.netSignalingBytesRead = netPC.getSignalingBytesRead();
             hbData.netSignalingBytesWritten = netPC.getSignalingBytesWritten();
 
+            MuxDemuxPerformanceCounters datasetNetPC = datasetNetworkManager.getPerformanceCounters();
+            hbData.datasetNetPayloadBytesRead = datasetNetPC.getPayloadBytesRead();
+            hbData.datasetNetPayloadBytesWritten = datasetNetPC.getPayloadBytesWritten();
+            hbData.datasetNetSignalingBytesRead = datasetNetPC.getSignalingBytesRead();
+            hbData.datasetNetSignalingBytesWritten = datasetNetPC.getSignalingBytesWritten();
+
             IPCPerformanceCounters ipcPC = ipc.getPerformanceCounters();
             hbData.ipcMessagesSent = ipcPC.getMessageSentCount();
             hbData.ipcMessageBytesSent = ipcPC.getMessageBytesSent();
@@ -459,6 +483,10 @@
         }
     }
 
+    public IDatasetPartitionManager getDatasetPartitionManager() {
+        return datasetPartitionManager;
+    }
+
     public void sendApplicationMessageToCC(byte[] data, String appName, String nodeId) throws Exception {
         ccs.sendApplicationMessageToCC(data, appName, nodeId);
     }
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 eba3ec9..5a3e9dd 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
@@ -34,6 +34,7 @@
 import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
 import edu.uci.ics.hyracks.api.dataflow.state.IStateObject;
+import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionManager;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.api.io.FileReference;
@@ -348,6 +349,11 @@
     }
 
     @Override
+    public IDatasetPartitionManager getDatasetPartitionManager() {
+        return ncs.getDatasetPartitionManager();
+    }
+
+    @Override
     public void sendApplicationMessageToCC(byte[] message, String nodeId) throws Exception {
         this.ncs.sendApplicationMessageToCC(message, this.getJobletContext().getApplicationContext()
                 .getApplicationName(), nodeId);
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetMemoryManager.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetMemoryManager.java
new file mode 100644
index 0000000..cecd677
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetMemoryManager.java
@@ -0,0 +1,237 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.control.nc.dataset;
+
+import java.nio.ByteBuffer;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+
+import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionWriter;
+import edu.uci.ics.hyracks.api.dataset.Page;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.partitions.ResultSetPartitionId;
+
+public class DatasetMemoryManager {
+    private final Set<Page> availPages;
+
+    private final LeastRecentlyUsedList leastRecentlyUsedList;
+
+    private final Map<ResultSetPartitionId, PartitionNode> resultPartitionNodesMap;
+
+    private final static int FRAME_SIZE = 32768;
+
+    public DatasetMemoryManager(int availableMemory) {
+        availPages = new HashSet<Page>();
+
+        // Atleast have one page for temporarily storing the results.
+        if (availableMemory <= 0)
+            availableMemory = FRAME_SIZE;
+
+        while (availableMemory >= FRAME_SIZE) {
+            /* TODO(madhusudancs): Should we have some way of accounting this memory usage by using Hyrack's allocateFrame()
+             * instead of direct ByteBuffer.allocate()?
+             */
+            availPages.add(new Page(ByteBuffer.allocate(FRAME_SIZE)));
+            availableMemory -= FRAME_SIZE;
+        }
+
+        leastRecentlyUsedList = new LeastRecentlyUsedList();
+        resultPartitionNodesMap = new HashMap<ResultSetPartitionId, PartitionNode>();
+    }
+
+    public Page requestPage(ResultSetPartitionId resultSetPartitionId, IDatasetPartitionWriter dpw)
+            throws OutOfMemoryError, HyracksDataException {
+        Page page;
+        if (availPages.isEmpty()) {
+            page = evictPage();
+        } else {
+            page = getAvailablePage();
+        }
+
+        page.clear();
+
+        /*
+         * It is extremely important to update the reference after obtaining the page because, in the cases where memory
+         * manager is allocated only one page of memory, the front of the LRU list should not be created by the
+         * update reference call before a page is pushed on to the element of the LRU list. So we first obtain the page,
+         * then make a updateReference call which in turn creates a new node in the LRU list and then add the page to it.
+         */
+        PartitionNode pn = updateReference(resultSetPartitionId, dpw);
+        pn.add(page);
+        return page;
+    }
+
+    public void pageReferenced(ResultSetPartitionId resultSetPartitionId) {
+        // When a page is referenced the dataset partition writer should already be known, so we pass null.
+        updateReference(resultSetPartitionId, null);
+    }
+
+    public int getPageSize() {
+        return FRAME_SIZE;
+    }
+
+    protected void insertPartitionNode(ResultSetPartitionId resultSetPartitionId, PartitionNode pn) {
+        leastRecentlyUsedList.add(pn);
+        resultPartitionNodesMap.put(resultSetPartitionId, pn);
+    }
+
+    protected synchronized PartitionNode updateReference(ResultSetPartitionId resultSetPartitionId,
+            IDatasetPartitionWriter dpw) {
+        PartitionNode pn = null;
+
+        if (!resultPartitionNodesMap.containsKey(resultSetPartitionId)) {
+            if (dpw != null) {
+                pn = new PartitionNode(resultSetPartitionId, dpw);
+                insertPartitionNode(resultSetPartitionId, pn);
+            }
+            return pn;
+        }
+        pn = resultPartitionNodesMap.get(resultSetPartitionId);
+        leastRecentlyUsedList.remove(pn);
+        insertPartitionNode(resultSetPartitionId, pn);
+
+        return pn;
+    }
+
+    protected synchronized Page evictPage() throws HyracksDataException {
+        PartitionNode pn = leastRecentlyUsedList.getFirst();
+        IDatasetPartitionWriter dpw = pn.getDatasetPartitionWriter();
+        Page page = dpw.returnPage();
+
+        /* If the partition holding the pages breaks the contract by not returning the page or it has no page, just take
+         * away all the pages allocated to it and add to the available pages set.
+         */
+        if (page == null) {
+            availPages.addAll(pn);
+            pn.clear();
+            resultPartitionNodesMap.remove(pn.getResultSetPartitionId());
+            leastRecentlyUsedList.remove(pn);
+
+            /* Based on the assumption that if the dataset partition writer returned a null page, it should be lying about
+             * the number of pages it holds in which case we just evict all the pages it holds and should thus be able to
+             * add all those pages to available set and we have at least one page to allocate back.
+             */
+            page = getAvailablePage();
+        } else {
+            pn.remove(page);
+
+            // If the partition no more holds any pages, remove it from the linked list and the hash map.
+            if (pn.isEmpty()) {
+                resultPartitionNodesMap.remove(pn.getResultSetPartitionId());
+                leastRecentlyUsedList.remove(pn);
+            }
+        }
+
+        return page;
+    }
+
+    protected synchronized Page getAvailablePage() {
+        Iterator<Page> iter = availPages.iterator();
+        Page page = iter.next();
+        iter.remove();
+        return page;
+    }
+
+    private class LeastRecentlyUsedList {
+        private PartitionNode head;
+
+        private PartitionNode tail;
+
+        public LeastRecentlyUsedList() {
+            head = null;
+            tail = null;
+        }
+
+        public void add(PartitionNode node) {
+            if (head == null) {
+                head = tail = node;
+                return;
+            }
+            tail.setNext(node);
+            node.setPrev(tail);
+            tail = node;
+        }
+
+        public void remove(PartitionNode node) {
+            if ((node == head) && (node == tail)) {
+                head = tail = null;
+                return;
+            } else if (node == head) {
+                head = head.getNext();
+                head.setPrev(null);
+                return;
+            } else if (node == tail) {
+                tail = tail.getPrev();
+                tail.setNext(null);
+                return;
+            } else {
+                PartitionNode prev = node.getPrev();
+                PartitionNode next = node.getNext();
+                prev.setNext(next);
+                next.setPrev(prev);
+            }
+        }
+
+        public PartitionNode getFirst() {
+            return head;
+        }
+    }
+
+    private class PartitionNode extends HashSet<Page> {
+        private static final long serialVersionUID = 1L;
+
+        private final ResultSetPartitionId resultSetPartitionId;
+
+        private final IDatasetPartitionWriter datasetPartitionWriter;
+
+        private PartitionNode prev;
+
+        private PartitionNode next;
+
+        public PartitionNode(ResultSetPartitionId resultSetPartitionId, IDatasetPartitionWriter datasetPartitionWriter) {
+            this.resultSetPartitionId = resultSetPartitionId;
+            this.datasetPartitionWriter = datasetPartitionWriter;
+            prev = null;
+            next = null;
+        }
+
+        public ResultSetPartitionId getResultSetPartitionId() {
+            return resultSetPartitionId;
+        }
+
+        public IDatasetPartitionWriter getDatasetPartitionWriter() {
+            return datasetPartitionWriter;
+        }
+
+        public void setPrev(PartitionNode node) {
+            prev = node;
+        }
+
+        public PartitionNode getPrev() {
+            return prev;
+        }
+
+        public void setNext(PartitionNode node) {
+            next = node;
+        }
+
+        public PartitionNode getNext() {
+            return next;
+        }
+    }
+}
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionManager.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionManager.java
new file mode 100644
index 0000000..1cad54b
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionManager.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.control.nc.dataset;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.Executor;
+
+import edu.uci.ics.hyracks.api.comm.IFrameWriter;
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionManager;
+import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionReader;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.io.IWorkspaceFileFactory;
+import edu.uci.ics.hyracks.api.job.JobId;
+import edu.uci.ics.hyracks.control.nc.NodeControllerService;
+import edu.uci.ics.hyracks.control.nc.io.IOManager;
+import edu.uci.ics.hyracks.control.nc.io.WorkspaceFileFactory;
+import edu.uci.ics.hyracks.control.nc.resources.DefaultDeallocatableRegistry;
+
+public class DatasetPartitionManager implements IDatasetPartitionManager {
+    private final NodeControllerService ncs;
+
+    private final Executor executor;
+
+    private final Map<JobId, ResultState[]> partitionResultStateMap;
+
+    private final DefaultDeallocatableRegistry deallocatableRegistry;
+
+    private final IWorkspaceFileFactory fileFactory;
+
+    private final DatasetMemoryManager datasetMemoryManager;
+
+    public DatasetPartitionManager(NodeControllerService ncs, Executor executor, int availableMemory) {
+        this.ncs = ncs;
+        this.executor = executor;
+        partitionResultStateMap = new HashMap<JobId, ResultState[]>();
+        deallocatableRegistry = new DefaultDeallocatableRegistry();
+        fileFactory = new WorkspaceFileFactory(deallocatableRegistry, (IOManager) ncs.getRootContext().getIOManager());
+        datasetMemoryManager = new DatasetMemoryManager(availableMemory);
+    }
+
+    @Override
+    public IFrameWriter createDatasetPartitionWriter(IHyracksTaskContext ctx, ResultSetId rsId, boolean orderedResult,
+            int partition, int nPartitions) throws HyracksException {
+        DatasetPartitionWriter dpw = null;
+        JobId jobId = ctx.getJobletContext().getJobId();
+        try {
+            ncs.getClusterController().registerResultPartitionLocation(jobId, rsId, orderedResult, partition,
+                    nPartitions, ncs.getDatasetNetworkManager().getNetworkAddress());
+            dpw = new DatasetPartitionWriter(ctx, this, jobId, rsId, partition, datasetMemoryManager);
+
+            ResultState[] resultStates = partitionResultStateMap.get(jobId);
+            if (resultStates == null) {
+                resultStates = new ResultState[nPartitions];
+                partitionResultStateMap.put(jobId, resultStates);
+            }
+            resultStates[partition] = dpw.getResultState();
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+
+        return dpw;
+    }
+
+    @Override
+    public void reportPartitionWriteCompletion(JobId jobId, ResultSetId rsId, int partition) throws HyracksException {
+        try {
+            ncs.getClusterController().reportResultPartitionWriteCompletion(jobId, rsId, partition);
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+
+    @Override
+    public void reportPartitionFailure(JobId jobId, ResultSetId rsId, int partition) throws HyracksException {
+        try {
+            ncs.getClusterController().reportResultPartitionFailure(jobId, rsId, partition);
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+
+    @Override
+    public void initializeDatasetPartitionReader(JobId jobId, int partition, IFrameWriter writer)
+            throws HyracksException {
+        ResultState[] resultStates = partitionResultStateMap.get(jobId);
+
+        if (resultStates == null) {
+            throw new HyracksException("Unknown JobId " + jobId);
+        }
+
+        ResultState resultState = resultStates[partition];
+        if (resultState == null) {
+            throw new HyracksException("No DatasetPartitionWriter for partition " + partition);
+        }
+
+        IDatasetPartitionReader dpr = new DatasetPartitionReader(datasetMemoryManager, executor, resultState);
+        dpr.writeTo(writer);
+    }
+
+    @Override
+    public IWorkspaceFileFactory getFileFactory() {
+        return fileFactory;
+    }
+
+    @Override
+    public void close() {
+        deallocatableRegistry.close();
+    }
+}
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionReader.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionReader.java
new file mode 100644
index 0000000..296c502
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionReader.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.control.nc.dataset;
+
+import java.nio.ByteBuffer;
+import java.util.concurrent.Executor;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import edu.uci.ics.hyracks.api.comm.IFrameWriter;
+import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionReader;
+import edu.uci.ics.hyracks.api.dataset.Page;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.io.IFileHandle;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.comm.channels.NetworkOutputChannel;
+
+public class DatasetPartitionReader implements IDatasetPartitionReader {
+    private static final Logger LOGGER = Logger.getLogger(DatasetPartitionReader.class.getName());
+
+    private final DatasetMemoryManager datasetMemoryManager;
+
+    private final Executor executor;
+
+    private final ResultState resultState;
+
+    private IFileHandle fileHandle;
+
+    public DatasetPartitionReader(DatasetMemoryManager datasetMemoryManager, Executor executor, ResultState resultState) {
+        this.datasetMemoryManager = datasetMemoryManager;
+        this.executor = executor;
+        this.resultState = resultState;
+    }
+
+    private long read(long offset, ByteBuffer buffer) throws HyracksDataException {
+        long readSize = 0;
+        synchronized (resultState) {
+            while (offset >= resultState.getSize() && !resultState.getEOS()) {
+                try {
+                    resultState.wait();
+                } catch (InterruptedException e) {
+                    throw new HyracksDataException(e);
+                }
+            }
+        }
+
+        if (offset >= resultState.getSize() && resultState.getEOS()) {
+            return readSize;
+        }
+
+        if (offset < resultState.getPersistentSize()) {
+            readSize = resultState.getIOManager().syncRead(fileHandle, offset, buffer);
+        }
+
+        if (readSize < buffer.capacity()) {
+            long localPageOffset = offset - resultState.getPersistentSize();
+            int localPageIndex = (int) (localPageOffset / datasetMemoryManager.getPageSize());
+            int pageOffset = (int) (localPageOffset % datasetMemoryManager.getPageSize());
+            Page page = resultState.getPage(localPageIndex);
+            readSize += buffer.remaining();
+            buffer.put(page.getBuffer().array(), pageOffset, buffer.remaining());
+        }
+
+        datasetMemoryManager.pageReferenced(resultState.getResultSetPartitionId());
+        return readSize;
+    }
+
+    @Override
+    public void writeTo(final IFrameWriter writer) {
+        executor.execute(new Runnable() {
+            @Override
+            public void run() {
+                NetworkOutputChannel channel = (NetworkOutputChannel) writer;
+                channel.setFrameSize(resultState.getFrameSize());
+                try {
+                    fileHandle = resultState.getIOManager().open(resultState.getValidFileReference(),
+                            IIOManager.FileReadWriteMode.READ_ONLY, IIOManager.FileSyncMode.METADATA_ASYNC_DATA_ASYNC);
+                    channel.open();
+                    try {
+                        long offset = 0;
+                        ByteBuffer buffer = ByteBuffer.allocate(resultState.getFrameSize());
+                        while (true) {
+                            buffer.clear();
+                            long size = read(offset, buffer);
+                            if (size <= 0) {
+                                break;
+                            } else if (size < buffer.limit()) {
+                                throw new HyracksDataException("Premature end of file - readSize: " + size
+                                        + " buffer limit: " + buffer.limit());
+                            }
+                            offset += size;
+                            buffer.flip();
+                            channel.nextFrame(buffer);
+                        }
+                    } finally {
+                        channel.close();
+                        resultState.getIOManager().close(fileHandle);
+                    }
+                } catch (InterruptedException e) {
+                    throw new RuntimeException(e);
+                } catch (HyracksDataException e) {
+                    throw new RuntimeException(e);
+                }
+                if (LOGGER.isLoggable(Level.INFO)) {
+                    LOGGER.info("result reading successful(" + resultState.getResultSetPartitionId() + ")");
+                }
+            }
+        });
+    }
+}
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionWriter.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionWriter.java
new file mode 100644
index 0000000..f6ae540
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionWriter.java
@@ -0,0 +1,148 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.control.nc.dataset;
+
+import java.nio.ByteBuffer;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionManager;
+import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionWriter;
+import edu.uci.ics.hyracks.api.dataset.Page;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IFileHandle;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.api.job.JobId;
+import edu.uci.ics.hyracks.api.partitions.ResultSetPartitionId;
+
+public class DatasetPartitionWriter implements IDatasetPartitionWriter {
+    private static final Logger LOGGER = Logger.getLogger(DatasetPartitionWriter.class.getName());
+
+    private static final String FILE_PREFIX = "result_";
+
+    private final IDatasetPartitionManager manager;
+
+    private final JobId jobId;
+
+    private final ResultSetId resultSetId;
+
+    private final int partition;
+
+    private final DatasetMemoryManager datasetMemoryManager;
+
+    private final ResultSetPartitionId resultSetPartitionId;
+
+    private final ResultState resultState;
+
+    private IFileHandle fileHandle;
+
+    public DatasetPartitionWriter(IHyracksTaskContext ctx, IDatasetPartitionManager manager, JobId jobId,
+            ResultSetId rsId, int partition, DatasetMemoryManager datasetMemoryManager) {
+        this.manager = manager;
+        this.jobId = jobId;
+        this.resultSetId = rsId;
+        this.partition = partition;
+        this.datasetMemoryManager = datasetMemoryManager;
+
+        resultSetPartitionId = new ResultSetPartitionId(jobId, rsId, partition);
+        resultState = new ResultState(resultSetPartitionId, ctx.getIOManager(), ctx.getFrameSize());
+    }
+
+    public ResultState getResultState() {
+        return resultState;
+    }
+
+    @Override
+    public void open() throws HyracksDataException {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("open(" + partition + ")");
+        }
+        String fName = FILE_PREFIX + String.valueOf(partition);
+        FileReference fRef = manager.getFileFactory().createUnmanagedWorkspaceFile(fName);
+        fileHandle = resultState.getIOManager().open(fRef, IIOManager.FileReadWriteMode.READ_WRITE,
+                IIOManager.FileSyncMode.METADATA_ASYNC_DATA_ASYNC);
+        resultState.init(fRef);
+    }
+
+    @Override
+    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+        int srcOffset = 0;
+        Page destPage = resultState.getLastPage();
+
+        while (srcOffset < buffer.limit()) {
+            if ((destPage == null) || (destPage.getBuffer().remaining() <= 0)) {
+                destPage = datasetMemoryManager.requestPage(resultSetPartitionId, this);
+                resultState.addPage(destPage);
+            }
+            int srcLength = Math.min(buffer.limit() - srcOffset, destPage.getBuffer().remaining());
+            destPage.getBuffer().put(buffer.array(), srcOffset, srcLength);
+            srcOffset += srcLength;
+            resultState.incrementSize(srcLength);
+        }
+
+        synchronized (resultState) {
+            resultState.notifyAll();
+        }
+    }
+
+    @Override
+    public void fail() throws HyracksDataException {
+        try {
+            manager.reportPartitionFailure(jobId, resultSetId, partition);
+        } catch (HyracksException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("close(" + partition + ")");
+        }
+
+        try {
+            synchronized (resultState) {
+                resultState.setEOS(true);
+                resultState.notifyAll();
+            }
+            manager.reportPartitionWriteCompletion(jobId, resultSetId, partition);
+        } catch (HyracksException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public Page returnPage() throws HyracksDataException {
+        Page page = resultState.removePage(0);
+
+        IIOManager ioManager = resultState.getIOManager();
+
+        // If we do not have any pages to be given back close the write channel since we don't write any more, return null.
+        if (page == null) {
+            ioManager.close(fileHandle);
+            return null;
+        }
+
+        page.getBuffer().flip();
+
+        long delta = ioManager.syncWrite(fileHandle, resultState.getPersistentSize(), page.getBuffer());
+        resultState.incrementPersistentSize(delta);
+        return page;
+    }
+}
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/ResultState.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/ResultState.java
new file mode 100644
index 0000000..3db3fd9
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/ResultState.java
@@ -0,0 +1,173 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.control.nc.dataset;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import edu.uci.ics.hyracks.api.dataflow.state.IStateObject;
+import edu.uci.ics.hyracks.api.dataset.Page;
+import edu.uci.ics.hyracks.api.io.FileReference;
+import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.api.job.JobId;
+import edu.uci.ics.hyracks.api.partitions.ResultSetPartitionId;
+
+public class ResultState implements IStateObject {
+    private final ResultSetPartitionId resultSetPartitionId;
+
+    private final int frameSize;
+
+    private final IIOManager ioManager;
+
+    private final AtomicBoolean eos;
+
+    private final AtomicBoolean readEOS;
+
+    private final List<Page> localPageList;
+
+    private FileReference fileRef;
+
+    private long size;
+
+    private long persistentSize;
+
+    ResultState(ResultSetPartitionId resultSetPartitionId, IIOManager ioManager, int frameSize) {
+        this.resultSetPartitionId = resultSetPartitionId;
+        this.ioManager = ioManager;
+        this.frameSize = frameSize;
+        eos = new AtomicBoolean(false);
+        readEOS = new AtomicBoolean(false);
+        localPageList = new ArrayList<Page>();
+    }
+
+    public synchronized void init(FileReference fileRef) {
+        this.fileRef = fileRef;
+
+        size = 0;
+        persistentSize = 0;
+        notifyAll();
+    }
+
+    public ResultSetPartitionId getResultSetPartitionId() {
+        return resultSetPartitionId;
+    }
+
+    public int getFrameSize() {
+        return frameSize;
+    }
+
+    public IIOManager getIOManager() {
+        return ioManager;
+    }
+
+    public synchronized void incrementSize(long delta) {
+        size += delta;
+    }
+
+    public synchronized long getSize() {
+        return size;
+    }
+
+    public synchronized void incrementPersistentSize(long delta) {
+        persistentSize += delta;
+    }
+
+    public synchronized long getPersistentSize() {
+        return persistentSize;
+    }
+
+    public void setEOS(boolean eos) {
+        this.eos.set(eos);
+    }
+
+    public boolean getEOS() {
+        return eos.get();
+    }
+
+    public boolean getReadEOS() {
+        return readEOS.get();
+    }
+
+    public synchronized void addPage(Page page) {
+        localPageList.add(page);
+    }
+
+    public synchronized Page removePage(int index) {
+        Page page = null;
+        if (!localPageList.isEmpty()) {
+            page = localPageList.remove(index);
+        }
+        return page;
+    }
+
+    public synchronized Page getPage(int index) {
+        Page page = null;
+        if (!localPageList.isEmpty()) {
+            page = localPageList.get(index);
+        }
+        return page;
+    }
+
+    public synchronized Page getLastPage() {
+        Page page = null;
+        if (!localPageList.isEmpty()) {
+            page = localPageList.get(localPageList.size() - 1);
+        }
+        return page;
+    }
+
+    public synchronized Page getFirstPage() {
+        Page page = null;
+        if (!localPageList.isEmpty()) {
+            page = localPageList.get(0);
+        }
+        return page;
+    }
+
+    public synchronized FileReference getValidFileReference() throws InterruptedException {
+        while (fileRef == null)
+            wait();
+        return fileRef;
+    }
+
+    @Override
+    public JobId getJobId() {
+        return resultSetPartitionId.getJobId();
+    }
+
+    @Override
+    public Object getId() {
+        return resultSetPartitionId;
+    }
+
+    @Override
+    public long getMemoryOccupancy() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void toBytes(DataOutput out) throws IOException {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void fromBytes(DataInput in) throws IOException {
+        throw new UnsupportedOperationException();
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/DatasetNetworkManager.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/DatasetNetworkManager.java
new file mode 100644
index 0000000..5b8b333
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/DatasetNetworkManager.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.control.nc.net;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+import java.nio.ByteBuffer;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import edu.uci.ics.hyracks.api.comm.NetworkAddress;
+import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionManager;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.job.JobId;
+import edu.uci.ics.hyracks.comm.channels.IChannelConnectionFactory;
+import edu.uci.ics.hyracks.comm.channels.NetworkOutputChannel;
+import edu.uci.ics.hyracks.net.buffers.ICloseableBufferAcceptor;
+import edu.uci.ics.hyracks.net.exceptions.NetException;
+import edu.uci.ics.hyracks.net.protocols.muxdemux.ChannelControlBlock;
+import edu.uci.ics.hyracks.net.protocols.muxdemux.IChannelOpenListener;
+import edu.uci.ics.hyracks.net.protocols.muxdemux.MultiplexedConnection;
+import edu.uci.ics.hyracks.net.protocols.muxdemux.MuxDemux;
+import edu.uci.ics.hyracks.net.protocols.muxdemux.MuxDemuxPerformanceCounters;
+
+public class DatasetNetworkManager implements IChannelConnectionFactory {
+    private static final Logger LOGGER = Logger.getLogger(DatasetNetworkManager.class.getName());
+
+    private static final int MAX_CONNECTION_ATTEMPTS = 5;
+
+    static final int INITIAL_MESSAGE_SIZE = 20;
+
+    private final IDatasetPartitionManager partitionManager;
+
+    private final MuxDemux md;
+
+    private NetworkAddress networkAddress;
+
+    public DatasetNetworkManager(InetAddress inetAddress, IDatasetPartitionManager partitionManager, int nThreads)
+            throws IOException {
+        this.partitionManager = partitionManager;
+        md = new MuxDemux(new InetSocketAddress(inetAddress, 0), new ChannelOpenListener(), nThreads,
+                MAX_CONNECTION_ATTEMPTS);
+    }
+
+    public void start() throws IOException {
+        md.start();
+        InetSocketAddress sockAddr = md.getLocalAddress();
+        networkAddress = new NetworkAddress(sockAddr.getAddress().getAddress(), sockAddr.getPort());
+    }
+
+    public NetworkAddress getNetworkAddress() {
+        return networkAddress;
+    }
+
+    public void stop() {
+
+    }
+
+    public ChannelControlBlock connect(SocketAddress remoteAddress) throws InterruptedException, NetException {
+        MultiplexedConnection mConn = md.connect((InetSocketAddress) remoteAddress);
+        return mConn.openChannel();
+    }
+
+    private class ChannelOpenListener implements IChannelOpenListener {
+        @Override
+        public void channelOpened(ChannelControlBlock channel) {
+            channel.getReadInterface().setFullBufferAcceptor(new InitialBufferAcceptor(channel));
+            channel.getReadInterface().getEmptyBufferAcceptor().accept(ByteBuffer.allocate(INITIAL_MESSAGE_SIZE));
+        }
+    }
+
+    private class InitialBufferAcceptor implements ICloseableBufferAcceptor {
+        private final ChannelControlBlock ccb;
+
+        private NetworkOutputChannel noc;
+
+        public InitialBufferAcceptor(ChannelControlBlock ccb) {
+            this.ccb = ccb;
+        }
+
+        @Override
+        public void accept(ByteBuffer buffer) {
+            JobId jobId = new JobId(buffer.getLong());
+            int partition = buffer.getInt();
+            if (LOGGER.isLoggable(Level.FINE)) {
+                LOGGER.fine("Received initial dataset partition read request for JobId: " + jobId + " partition: "
+                        + partition + " on channel: " + ccb);
+            }
+            noc = new NetworkOutputChannel(ccb, 1);
+            try {
+                partitionManager.initializeDatasetPartitionReader(jobId, partition, noc);
+            } catch (HyracksException e) {
+                noc.abort();
+            }
+        }
+
+        @Override
+        public void close() {
+
+        }
+
+        @Override
+        public void error(int ecode) {
+            if (noc != null) {
+                noc.abort();
+            }
+        }
+    }
+
+    public MuxDemuxPerformanceCounters getPerformanceCounters() {
+        return md.getPerformanceCounters();
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkManager.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkManager.java
index b805595..c8e4e94 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkManager.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkManager.java
@@ -27,6 +27,8 @@
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.partitions.PartitionId;
+import edu.uci.ics.hyracks.comm.channels.IChannelConnectionFactory;
+import edu.uci.ics.hyracks.comm.channels.NetworkOutputChannel;
 import edu.uci.ics.hyracks.control.nc.partitions.PartitionManager;
 import edu.uci.ics.hyracks.net.buffers.ICloseableBufferAcceptor;
 import edu.uci.ics.hyracks.net.exceptions.NetException;
@@ -36,7 +38,7 @@
 import edu.uci.ics.hyracks.net.protocols.muxdemux.MuxDemux;
 import edu.uci.ics.hyracks.net.protocols.muxdemux.MuxDemuxPerformanceCounters;
 
-public class NetworkManager {
+public class NetworkManager implements IChannelConnectionFactory {
     private static final Logger LOGGER = Logger.getLogger(NetworkManager.class.getName());
 
     private static final int MAX_CONNECTION_ATTEMPTS = 5;
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/partitions/MaterializedPartitionInputChannel.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/partitions/MaterializedPartitionInputChannel.java
index 16e31f7..ba6e6c3 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/partitions/MaterializedPartitionInputChannel.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/partitions/MaterializedPartitionInputChannel.java
@@ -21,7 +21,7 @@
 import edu.uci.ics.hyracks.api.channels.IInputChannel;
 import edu.uci.ics.hyracks.api.channels.IInputChannelMonitor;
 import edu.uci.ics.hyracks.api.comm.IFrameWriter;
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.context.IHyracksCommonContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.partitions.IPartition;
 import edu.uci.ics.hyracks.api.partitions.PartitionId;
@@ -82,7 +82,7 @@
     }
 
     @Override
-    public void open(IHyracksTaskContext ctx) throws HyracksDataException {
+    public void open(IHyracksCommonContext ctx) throws HyracksDataException {
         for (int i = 0; i < nBuffers; ++i) {
             emptyQueue.add(ctx.allocateFrame());
         }
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/partitions/PartitionManager.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/partitions/PartitionManager.java
index 45c091a..ea88a75 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/partitions/PartitionManager.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/partitions/PartitionManager.java
@@ -28,12 +28,12 @@
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.partitions.IPartition;
 import edu.uci.ics.hyracks.api.partitions.PartitionId;
+import edu.uci.ics.hyracks.comm.channels.NetworkOutputChannel;
 import edu.uci.ics.hyracks.control.common.job.PartitionDescriptor;
 import edu.uci.ics.hyracks.control.common.job.PartitionState;
 import edu.uci.ics.hyracks.control.nc.NodeControllerService;
 import edu.uci.ics.hyracks.control.nc.io.IOManager;
 import edu.uci.ics.hyracks.control.nc.io.WorkspaceFileFactory;
-import edu.uci.ics.hyracks.control.nc.net.NetworkOutputChannel;
 import edu.uci.ics.hyracks.control.nc.resources.DefaultDeallocatableRegistry;
 
 public class PartitionManager {
@@ -98,7 +98,7 @@
         List<IPartition> pList = partitionMap.get(partitionId);
         if (pList != null && !pList.isEmpty()) {
             IPartition partition = pList.get(0);
-            writer.setTaskContext(partition.getTaskContext());
+            writer.setFrameSize(partition.getTaskContext().getFrameSize());
             partition.writeTo(writer);
             if (!partition.isReusable()) {
                 partitionMap.remove(partitionId);
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/ReportPartitionAvailabilityWork.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/ReportPartitionAvailabilityWork.java
index bb9669d..7ed9d11 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/ReportPartitionAvailabilityWork.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/ReportPartitionAvailabilityWork.java
@@ -22,10 +22,10 @@
 import edu.uci.ics.hyracks.api.comm.PartitionChannel;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.partitions.PartitionId;
+import edu.uci.ics.hyracks.comm.channels.NetworkInputChannel;
 import edu.uci.ics.hyracks.control.common.work.AbstractWork;
 import edu.uci.ics.hyracks.control.nc.Joblet;
 import edu.uci.ics.hyracks.control.nc.NodeControllerService;
-import edu.uci.ics.hyracks.control.nc.net.NetworkInputChannel;
 
 public class ReportPartitionAvailabilityWork extends AbstractWork {
     private final NodeControllerService ncs;
diff --git a/hyracks/hyracks-control/pom.xml b/hyracks/hyracks-control/pom.xml
index 13ebf41..e1ab98d 100644
--- a/hyracks/hyracks-control/pom.xml
+++ b/hyracks/hyracks-control/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-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 8f5f04e..fe53083 100644
--- a/hyracks/hyracks-data/hyracks-data-std/pom.xml
+++ b/hyracks/hyracks-data/hyracks-data-std/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-data</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,7 +27,7 @@
   <dependency>
   	<groupId>edu.uci.ics.hyracks</groupId>
   	<artifactId>hyracks-api</artifactId>
-  	<version>0.2.3-SNAPSHOT</version>
+  	<version>0.2.4-SNAPSHOT</version>
   </dependency>
   </dependencies>
 </project>
diff --git a/hyracks/hyracks-data/hyracks-data-std/src/main/java/edu/uci/ics/hyracks/data/std/util/ByteArrayAccessibleOutputStream.java b/hyracks/hyracks-data/hyracks-data-std/src/main/java/edu/uci/ics/hyracks/data/std/util/ByteArrayAccessibleOutputStream.java
index 8508287..c0ba163 100644
--- a/hyracks/hyracks-data/hyracks-data-std/src/main/java/edu/uci/ics/hyracks/data/std/util/ByteArrayAccessibleOutputStream.java
+++ b/hyracks/hyracks-data/hyracks-data-std/src/main/java/edu/uci/ics/hyracks/data/std/util/ByteArrayAccessibleOutputStream.java
@@ -21,6 +21,14 @@
 public class ByteArrayAccessibleOutputStream extends ByteArrayOutputStream {
     private static final Logger LOGGER = Logger.getLogger(ByteArrayAccessibleOutputStream.class.getName());
 
+    public ByteArrayAccessibleOutputStream() {
+        super();
+    }
+
+    public ByteArrayAccessibleOutputStream(int size) {
+        super(size);
+    }
+
     public byte[] getByteArray() {
         return buf;
     }
diff --git a/hyracks/hyracks-data/pom.xml b/hyracks/hyracks-data/pom.xml
index db4d8e9..45460ca 100644
--- a/hyracks/hyracks-data/pom.xml
+++ b/hyracks/hyracks-data/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-dataflow-common/pom.xml b/hyracks/hyracks-dataflow-common/pom.xml
index 1a2950b..c66d10e 100644
--- a/hyracks/hyracks-dataflow-common/pom.xml
+++ b/hyracks/hyracks-dataflow-common/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -26,14 +26,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-data-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   	</dependency>
   </dependencies>
 </project>
diff --git a/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/comm/io/FrameOutputStream.java b/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/comm/io/FrameOutputStream.java
new file mode 100644
index 0000000..07f6ba2
--- /dev/null
+++ b/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/comm/io/FrameOutputStream.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.dataflow.common.comm.io;
+
+import java.nio.ByteBuffer;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import edu.uci.ics.hyracks.data.std.util.ByteArrayAccessibleOutputStream;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
+
+public class FrameOutputStream extends ByteArrayAccessibleOutputStream {
+    private static final Logger LOGGER = Logger.getLogger(FrameOutputStream.class.getName());
+
+    private final FrameTupleAppender frameTupleAppender;
+
+    public FrameOutputStream(int frameSize) {
+        super(frameSize);
+        this.frameTupleAppender = new FrameTupleAppender(frameSize);
+    }
+
+    public void reset(ByteBuffer buffer, boolean clear) {
+        frameTupleAppender.reset(buffer, clear);
+    }
+
+    public int getTupleCount() {
+        int tupleCount = frameTupleAppender.getTupleCount();
+        if (LOGGER.isLoggable(Level.FINEST)) {
+            LOGGER.finest("appendTuple(): tuple count: " + tupleCount);
+        }
+        return tupleCount;
+    }
+
+    public boolean appendTuple() {
+        if (LOGGER.isLoggable(Level.FINEST)) {
+            LOGGER.finest("appendTuple(): tuple size: " + count);
+        }
+        boolean appended = frameTupleAppender.append(buf, 0, count);
+        count = 0;
+        return appended;
+    }
+}
diff --git a/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/comm/io/ResultFrameTupleAccessor.java b/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/comm/io/ResultFrameTupleAccessor.java
new file mode 100644
index 0000000..915a436
--- /dev/null
+++ b/hyracks/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/comm/io/ResultFrameTupleAccessor.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.dataflow.common.comm.io;
+
+import java.io.DataInputStream;
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.comm.FrameHelper;
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.dataflow.common.comm.util.ByteBufferInputStream;
+
+public class ResultFrameTupleAccessor implements IFrameTupleAccessor {
+
+    private final int frameSize;
+    private ByteBuffer buffer;
+
+    public ResultFrameTupleAccessor(int frameSize) {
+        this.frameSize = frameSize;
+    }
+
+    @Override
+    public void reset(ByteBuffer buffer) {
+        this.buffer = buffer;
+    }
+
+    @Override
+    public ByteBuffer getBuffer() {
+        return buffer;
+    }
+
+    @Override
+    public int getTupleCount() {
+        return buffer.getInt(FrameHelper.getTupleCountOffset(frameSize));
+    }
+
+    @Override
+    public int getTupleStartOffset(int tupleIndex) {
+        return tupleIndex == 0 ? 0 : buffer.getInt(FrameHelper.getTupleCountOffset(frameSize) - 4 * tupleIndex);
+    }
+
+    @Override
+    public int getTupleEndOffset(int tupleIndex) {
+        return buffer.getInt(FrameHelper.getTupleCountOffset(frameSize) - 4 * (tupleIndex + 1));
+    }
+
+    @Override
+    public int getFieldStartOffset(int tupleIndex, int fIdx) {
+        return fIdx == 0 ? 0 : buffer.getInt(getTupleStartOffset(tupleIndex) + (fIdx - 1) * 4);
+    }
+
+    @Override
+    public int getFieldEndOffset(int tupleIndex, int fIdx) {
+        return buffer.getInt(getTupleStartOffset(tupleIndex) + fIdx * 4);
+    }
+
+    @Override
+    public int getFieldLength(int tupleIndex, int fIdx) {
+        return getFieldEndOffset(tupleIndex, fIdx) - getFieldStartOffset(tupleIndex, fIdx);
+    }
+
+    @Override
+    public int getFieldSlotsLength() {
+        return getFieldCount() * 4;
+    }
+
+    public void prettyPrint() {
+        ByteBufferInputStream bbis = new ByteBufferInputStream();
+        DataInputStream dis = new DataInputStream(bbis);
+        int tc = getTupleCount();
+        System.err.println("TC: " + tc);
+        for (int i = 0; i < tc; ++i) {
+            System.err.print(i + ":(" + getTupleStartOffset(i) + ", " + getTupleEndOffset(i) + ")[");
+
+            bbis.setByteBuffer(buffer, getTupleStartOffset(i));
+            System.err.print(dis);
+
+            System.err.println("]");
+        }
+    }
+
+    @Override
+    public int getFieldCount() {
+        return 1;
+    }
+}
diff --git a/hyracks/hyracks-dataflow-hadoop/pom.xml b/hyracks/hyracks-dataflow-hadoop/pom.xml
index f5135f8..18bcba7 100644
--- a/hyracks/hyracks-dataflow-hadoop/pom.xml
+++ b/hyracks/hyracks-dataflow-hadoop/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -26,14 +26,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
@@ -53,7 +53,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   </dependencies>
diff --git a/hyracks/hyracks-dataflow-std/pom.xml b/hyracks/hyracks-dataflow-std/pom.xml
index 2cf0fdc..bd4a837 100644
--- a/hyracks/hyracks-dataflow-std/pom.xml
+++ b/hyracks/hyracks-dataflow-std/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -27,14 +27,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-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/result/ResultWriterOperatorDescriptor.java b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/result/ResultWriterOperatorDescriptor.java
new file mode 100644
index 0000000..edca60a
--- /dev/null
+++ b/hyracks/hyracks-dataflow-std/src/main/java/edu/uci/ics/hyracks/dataflow/std/result/ResultWriterOperatorDescriptor.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.dataflow.std.result;
+
+import java.io.IOException;
+import java.io.PrintStream;
+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.IOperatorNodePushable;
+import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
+import edu.uci.ics.hyracks.api.dataflow.value.IResultSerializer;
+import edu.uci.ics.hyracks.api.dataflow.value.IResultSerializerFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionManager;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameOutputStream;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
+import edu.uci.ics.hyracks.dataflow.std.base.AbstractSingleActivityOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputSinkOperatorNodePushable;
+
+public class ResultWriterOperatorDescriptor extends AbstractSingleActivityOperatorDescriptor {
+    private static final long serialVersionUID = 1L;
+
+    private final ResultSetId rsId;
+
+    private final boolean ordered;
+
+    private final IResultSerializerFactory resultSerializerFactory;
+
+    public ResultWriterOperatorDescriptor(IOperatorDescriptorRegistry spec, ResultSetId rsId, boolean ordered,
+            IResultSerializerFactory resultSerializerFactory) throws IOException {
+        super(spec, 1, 0);
+        this.rsId = rsId;
+        this.ordered = ordered;
+        this.resultSerializerFactory = resultSerializerFactory;
+    }
+
+    @Override
+    public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
+            IRecordDescriptorProvider recordDescProvider, final int partition, final int nPartitions) {
+        final IDatasetPartitionManager dpm = ctx.getDatasetPartitionManager();
+
+        final ByteBuffer outputBuffer = ctx.allocateFrame();
+
+        final FrameOutputStream frameOutputStream = new FrameOutputStream(ctx.getFrameSize());
+        frameOutputStream.reset(outputBuffer, true);
+        PrintStream printStream = new PrintStream(frameOutputStream);
+
+        final RecordDescriptor outRecordDesc = recordDescProvider.getInputRecordDescriptor(getActivityId(), 0);
+        final IResultSerializer resultSerializer = resultSerializerFactory.createResultSerializer(outRecordDesc,
+                printStream);
+
+        final FrameTupleAccessor frameTupleAccessor = new FrameTupleAccessor(ctx.getFrameSize(), outRecordDesc);
+
+        return new AbstractUnaryInputSinkOperatorNodePushable() {
+            IFrameWriter datasetPartitionWriter;
+
+            @Override
+            public void open() throws HyracksDataException {
+                try {
+                    datasetPartitionWriter = dpm.createDatasetPartitionWriter(ctx, rsId, ordered, partition,
+                            nPartitions);
+                    datasetPartitionWriter.open();
+                    resultSerializer.init();
+                } catch (HyracksException e) {
+                    throw new HyracksDataException(e);
+                }
+            }
+
+            @Override
+            public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+                frameTupleAccessor.reset(buffer);
+                for (int tIndex = 0; tIndex < frameTupleAccessor.getTupleCount(); tIndex++) {
+                    resultSerializer.appendTuple(frameTupleAccessor, tIndex);
+                    if (!frameOutputStream.appendTuple()) {
+                        datasetPartitionWriter.nextFrame(outputBuffer);
+                        frameOutputStream.reset(outputBuffer, true);
+
+                        /* TODO(madhusudancs): This works under the assumption that no single serialized record is
+                         * longer than the buffer size.
+                         */
+                        resultSerializer.appendTuple(frameTupleAccessor, tIndex);
+                        frameOutputStream.appendTuple();
+                    }
+                }
+            }
+
+            @Override
+            public void fail() throws HyracksDataException {
+                datasetPartitionWriter.fail();
+            }
+
+            @Override
+            public void close() throws HyracksDataException {
+                if (frameOutputStream.getTupleCount() > 0) {
+                    datasetPartitionWriter.nextFrame(outputBuffer);
+                    frameOutputStream.reset(outputBuffer, true);
+                }
+                datasetPartitionWriter.close();
+            }
+        };
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-dist/pom.xml b/hyracks/hyracks-dist/pom.xml
index 58a4b1c..e79eba7 100755
--- a/hyracks/hyracks-dist/pom.xml
+++ b/hyracks/hyracks-dist/pom.xml
@@ -1,12 +1,10 @@
 <?xml version="1.0"?>
-<project
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
-	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<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>
 		<artifactId>hyracks</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 	<artifactId>hyracks-dist</artifactId>
diff --git a/hyracks/hyracks-dist/src/main/resources/bin/getip.sh b/hyracks/hyracks-dist/src/main/resources/bin/getip.sh
index e0cdf73..a691c0f 100755
--- a/hyracks/hyracks-dist/src/main/resources/bin/getip.sh
+++ b/hyracks/hyracks-dist/src/main/resources/bin/getip.sh
@@ -6,6 +6,10 @@
 then
         #Get IP Address
         IPADDR=`/sbin/ifconfig eth0 | grep "inet " | awk '{print $2}' | cut -f 2 -d ':'`
+    	if [ "$IPADDR" = "" ]
+        then
+		IPADDR=`/sbin/ifconfig em1 | 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 ':'`
diff --git a/hyracks/hyracks-dist/src/main/resources/bin/startcc.sh b/hyracks/hyracks-dist/src/main/resources/bin/startcc.sh
index fe2551d..484ecac 100755
--- a/hyracks/hyracks-dist/src/main/resources/bin/startcc.sh
+++ b/hyracks/hyracks-dist/src/main/resources/bin/startcc.sh
@@ -22,4 +22,10 @@
 
 #Launch hyracks cc script
 chmod -R 755 $HYRACKS_HOME
-$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyrackscc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 3 &> $CCLOGS_DIR/cc.log &
+if [ -f "conf/topology.xml"  ]; then
+#Launch hyracks cc script with topology
+$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyrackscc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 0 -cluster-topology "conf/topology.xml" &> $CCLOGS_DIR/cc.log &
+else
+#Launch hyracks cc script without toplogy
+$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyrackscc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 0 &> $CCLOGS_DIR/cc.log &
+fi
diff --git a/hyracks/hyracks-dist/src/main/resources/bin/startnc.sh b/hyracks/hyracks-dist/src/main/resources/bin/startnc.sh
index 6e0f90e..23a4c36 100755
--- a/hyracks/hyracks-dist/src/main/resources/bin/startnc.sh
+++ b/hyracks/hyracks-dist/src/main/resources/bin/startnc.sh
@@ -46,4 +46,4 @@
 cd $NCTMP_DIR
 
 #Launch hyracks nc
-$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyracksnc -cc-host $CCHOST -cc-port $CC_CLUSTERPORT -cluster-net-ip-address $IPADDR  -data-ip-address $IPADDR -node-id $NODEID -iodevices "${IO_DIRS}" &> $NCLOGS_DIR/$NODEID.log &
+$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyracksnc -cc-host $CCHOST -cc-port $CC_CLUSTERPORT -cluster-net-ip-address $IPADDR  -data-ip-address $IPADDR -result-ip-address $IPADDR -node-id $NODEID -iodevices "${IO_DIRS}" &> $NCLOGS_DIR/$NODEID.log &
diff --git a/hyracks/hyracks-dist/src/main/resources/bin/stopnc.sh b/hyracks/hyracks-dist/src/main/resources/bin/stopnc.sh
index 03ce4e7..35c4794 100755
--- a/hyracks/hyracks-dist/src/main/resources/bin/stopnc.sh
+++ b/hyracks/hyracks-dist/src/main/resources/bin/stopnc.sh
@@ -5,6 +5,10 @@
 PID=`ps -ef|grep ${USER}|grep java|grep 'Dapp.name=hyracksnc'|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=hyracksnc'|awk '{print $2}'`
 fi
diff --git a/hyracks/hyracks-dist/src/main/resources/conf/topology-template.xml b/hyracks/hyracks-dist/src/main/resources/conf/topology-template.xml
new file mode 100755
index 0000000..4710706
--- /dev/null
+++ b/hyracks/hyracks-dist/src/main/resources/conf/topology-template.xml
@@ -0,0 +1,7 @@
+<cluster-topology>
+    <network-switch name="Global">
+        <network-switch name="local">
+            <terminal name="127.0.0.1"/>
+        </network-switch>
+    </network-switch>
+</cluster-topology>
\ No newline at end of file
diff --git a/hyracks/hyracks-documentation/pom.xml b/hyracks/hyracks-documentation/pom.xml
index 7aedd57..b5e42ad 100644
--- a/hyracks/hyracks-documentation/pom.xml
+++ b/hyracks/hyracks-documentation/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
diff --git a/hyracks/hyracks-examples/btree-example/btreeapp/pom.xml b/hyracks/hyracks-examples/btree-example/btreeapp/pom.xml
index 792cedd..f392b34 100644
--- a/hyracks/hyracks-examples/btree-example/btreeapp/pom.xml
+++ b/hyracks/hyracks-examples/btree-example/btreeapp/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>btree-example</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -80,7 +80,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks.examples.btree</groupId>
   		<artifactId>btreehelper</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   </dependencies>
diff --git a/hyracks/hyracks-examples/btree-example/btreeclient/pom.xml b/hyracks/hyracks-examples/btree-example/btreeclient/pom.xml
index f941a5b..64e30f9 100644
--- a/hyracks/hyracks-examples/btree-example/btreeclient/pom.xml
+++ b/hyracks/hyracks-examples/btree-example/btreeclient/pom.xml
@@ -6,26 +6,26 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>btree-example</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks.examples.btree</groupId>
   		<artifactId>btreehelper</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml b/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml
index eb651ce..7f212ab 100644
--- a/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml
+++ b/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml
@@ -6,32 +6,32 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>btree-example</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-data-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   	</dependency>
   </dependencies>
   <build>
diff --git a/hyracks/hyracks-examples/btree-example/pom.xml b/hyracks/hyracks-examples/btree-example/pom.xml
index 0ff4fc3..b6fbb95 100644
--- a/hyracks/hyracks-examples/btree-example/pom.xml
+++ b/hyracks/hyracks-examples/btree-example/pom.xml
@@ -2,14 +2,14 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks.examples</groupId>
   <artifactId>btree-example</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>btree-example</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-examples</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/pom.xml b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/pom.xml
index 4cf9745..6171214 100644
--- a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/pom.xml
+++ b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatapp/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>hadoop-compat-example</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -77,7 +77,7 @@
       <plugin>
       	<groupId>edu.uci.ics.hyracks</groupId>
       	<artifactId>hyracks-virtualcluster-maven-plugin</artifactId>
-      	<version>0.2.3-SNAPSHOT</version>
+      	<version>0.2.4-SNAPSHOT</version>
         <configuration>
           <hyracksServerHome>${basedir}/../../../hyracks-server/target/hyracks-server-${project.version}-binary-assembly</hyracksServerHome>
           <hyracksCLIHome>${basedir}/../../../hyracks-cli/target/hyracks-cli-${project.version}-binary-assembly</hyracksCLIHome>
@@ -171,13 +171,13 @@
      <dependency>
         <groupId>edu.uci.ics.hyracks.examples.compat</groupId>
         <artifactId>hadoopcompathelper</artifactId>
-        <version>0.2.3-SNAPSHOT</version>
+        <version>0.2.4-SNAPSHOT</version>
         <scope>compile</scope>
      </dependency>
      <dependency>
         <groupId>edu.uci.ics.hyracks.examples.compat</groupId>
   	    <artifactId>hadoopcompatclient</artifactId>
-  	    <version>0.2.3-SNAPSHOT</version>
+  	    <version>0.2.4-SNAPSHOT</version>
   	    <type>jar</type>
   	    <scope>test</scope>
      </dependency>
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatclient/pom.xml b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatclient/pom.xml
index f52536c..31809c7 100644
--- a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatclient/pom.xml
+++ b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompatclient/pom.xml
@@ -7,20 +7,20 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>hadoop-compat-example</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks.examples.compat</groupId>
   		<artifactId>hadoopcompathelper</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-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 c397a72..e8a9a1b 100644
--- a/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompathelper/pom.xml
+++ b/hyracks/hyracks-examples/hadoop-compat-example/hadoopcompathelper/pom.xml
@@ -7,20 +7,20 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>hadoop-compat-example</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   </dependencies>
diff --git a/hyracks/hyracks-examples/hadoop-compat-example/pom.xml b/hyracks/hyracks-examples/hadoop-compat-example/pom.xml
index 16787ca..9d07031 100644
--- a/hyracks/hyracks-examples/hadoop-compat-example/pom.xml
+++ b/hyracks/hyracks-examples/hadoop-compat-example/pom.xml
@@ -8,7 +8,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-examples</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <modules>
@@ -29,7 +29,7 @@
       <dependency>
          <groupId>edu.uci.ics.hyracks</groupId>
          <artifactId>hyracks-hadoop-compat</artifactId>
-         <version>0.2.3-SNAPSHOT</version>
+         <version>0.2.4-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 1daf1f7..f019b44 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/pom.xml
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-examples</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -32,58 +32,65 @@
   		<scope>test</scope>
   	</dependency>
   	<dependency>
+        <groupId>edu.uci.ics.hyracks</groupId>
+        <artifactId>hyracks-client</artifactId>
+        <version>0.2.4-SNAPSHOT</version>
+        <type>jar</type>
+        <scope>compile</scope>
+    </dependency>
+  	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-cc</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-nc</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-invertedindex</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-rtree</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>test</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-data-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   	</dependency>
   </dependencies>
 </project>
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexScanOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexScanOperatorTest.java
index 8482083..33ddca2 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexScanOperatorTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexScanOperatorTest.java
@@ -30,6 +30,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
@@ -44,8 +45,8 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
@@ -60,6 +61,7 @@
 import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
 import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
 import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class BTreePrimaryIndexScanOperatorTest extends AbstractIntegrationTest {
     static {
@@ -114,7 +116,7 @@
         spec.addRoot(primaryCreateOp);
         runTest(spec);
     }
-    
+
     public void loadPrimaryIndexTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
@@ -143,8 +145,9 @@
 
         int[] fieldPermutation = { 0, 1, 2, 4, 5, 7 };
         TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories, fieldPermutation, 0.7f,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, fieldPermutation, 0.7f, dataflowHelperFactory,
+                NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
@@ -179,13 +182,16 @@
         int[] highKeyFields = null; // + infinity
 
         BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories, lowKeyFields,
-                highKeyFields, true, true, dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, lowKeyFields, highKeyFields, true, true, dataflowHelperFactory, false,
+                NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryBtreeSearchOp, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexSearchOperatorTest.java
index 82fecbe..acd3027 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexSearchOperatorTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexSearchOperatorTest.java
@@ -30,6 +30,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
@@ -44,8 +45,8 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
@@ -60,6 +61,7 @@
 import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
 import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
 import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class BTreePrimaryIndexSearchOperatorTest extends AbstractIntegrationTest {
     static {
@@ -114,7 +116,7 @@
         spec.addRoot(primaryCreateOp);
         runTest(spec);
     }
-    
+
     public void loadPrimaryIndexTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
@@ -143,8 +145,9 @@
 
         int[] fieldPermutation = { 0, 1, 2, 4, 5, 7 };
         TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories, fieldPermutation, 0.7f,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, fieldPermutation, 0.7f, dataflowHelperFactory,
+                NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
@@ -184,13 +187,16 @@
         int[] highKeyFields = { 1 };
 
         BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories, lowKeyFields,
-                highKeyFields, true, true, dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, lowKeyFields, highKeyFields, true, true, dataflowHelperFactory, false,
+                NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryBtreeSearchOp, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexStatsOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexStatsOperatorTest.java
index e63ce11..ca03b16 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexStatsOperatorTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreePrimaryIndexStatsOperatorTest.java
@@ -29,6 +29,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
@@ -42,7 +43,7 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
@@ -57,6 +58,7 @@
 import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
 import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
 import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class BTreePrimaryIndexStatsOperatorTest extends AbstractIntegrationTest {
     static {
@@ -82,7 +84,6 @@
     private IFileSplitProvider primaryBtreeSplitProvider = new ConstantFileSplitProvider(
             new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(primaryFileName))) });
 
-
     @Before
     public void setup() throws Exception {
         // field, type and key declarations for primary index
@@ -107,7 +108,7 @@
         spec.addRoot(primaryCreateOp);
         runTest(spec);
     }
-    
+
     public void loadPrimaryIndexTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
@@ -136,8 +137,9 @@
 
         int[] fieldPermutation = { 0, 1, 2, 4, 5, 7 };
         TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories, fieldPermutation, 0.7f,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, fieldPermutation, 0.7f, dataflowHelperFactory,
+                NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
@@ -153,12 +155,15 @@
         JobSpecification spec = new JobSpecification();
 
         TreeIndexStatsOperatorDescriptor primaryStatsOp = new TreeIndexStatsOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, primaryBtreeSplitProvider,
-                primaryTypeTraits, primaryComparatorFactories, dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories,
+                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryStatsOp, NC1_ID);
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), primaryStatsOp, 0, printer, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeSecondaryIndexInsertOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeSecondaryIndexInsertOperatorTest.java
index 3c87ae3..34a1cd3 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeSecondaryIndexInsertOperatorTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeSecondaryIndexInsertOperatorTest.java
@@ -30,6 +30,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
@@ -44,9 +45,9 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.misc.NullSinkOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
@@ -63,6 +64,7 @@
 import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
 import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
 import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class BTreeSecondaryIndexInsertOperatorTest extends AbstractIntegrationTest {
     static {
@@ -339,9 +341,11 @@
                 primaryHighKeyFields, true, true, dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, secondaryBtreeSearchOp, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeSecondaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeSecondaryIndexSearchOperatorTest.java
index 1304f12..c9ee118 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeSecondaryIndexSearchOperatorTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeSecondaryIndexSearchOperatorTest.java
@@ -30,6 +30,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
@@ -44,8 +45,8 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
@@ -60,6 +61,7 @@
 import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
 import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
 import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class BTreeSecondaryIndexSearchOperatorTest extends AbstractIntegrationTest {
     static {
@@ -137,7 +139,7 @@
         spec.addRoot(primaryCreateOp);
         runTest(spec);
     }
-    
+
     public void loadPrimaryIndexTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
@@ -166,8 +168,9 @@
 
         int[] fieldPermutation = { 0, 1, 2, 4, 5, 7 };
         TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories, fieldPermutation, 0.7f,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, fieldPermutation, 0.7f, dataflowHelperFactory,
+                NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
@@ -180,14 +183,14 @@
 
     public void createSecondaryIndex() throws Exception {
         JobSpecification spec = new JobSpecification();
-        TreeIndexCreateOperatorDescriptor secondaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
-                indexRegistryProvider, secondaryBtreeSplitProvider, secondaryTypeTraits, secondaryComparatorFactories,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+        TreeIndexCreateOperatorDescriptor secondaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec,
+                storageManager, indexRegistryProvider, secondaryBtreeSplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryCreateOp, NC1_ID);
         spec.addRoot(secondaryCreateOp);
         runTest(spec);
     }
-    
+
     public void loadSecondaryIndexTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
@@ -212,8 +215,9 @@
 
         // scan primary index
         BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories, lowKeyFields,
-                highKeyFields, true, true, dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, lowKeyFields, highKeyFields, true, true, dataflowHelperFactory, false,
+                NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
 
         // sort based on secondary keys
@@ -225,8 +229,9 @@
         // load secondary index
         int[] fieldPermutation = { 3, 0 };
         TreeIndexBulkLoadOperatorDescriptor secondaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, secondaryBtreeSplitProvider, secondaryTypeTraits, secondaryComparatorFactories, fieldPermutation, 0.7f,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, indexRegistryProvider, secondaryBtreeSplitProvider, secondaryTypeTraits,
+                secondaryComparatorFactories, fieldPermutation, 0.7f, dataflowHelperFactory,
+                NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeBulkLoad, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryBtreeSearchOp, 0);
@@ -268,8 +273,8 @@
         // search secondary index
         BTreeSearchOperatorDescriptor secondaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec,
                 secondaryRecDesc, storageManager, indexRegistryProvider, secondaryBtreeSplitProvider,
-                secondaryTypeTraits, secondaryComparatorFactories, secondaryLowKeyFields, secondaryHighKeyFields, true, true,
-                dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                secondaryTypeTraits, secondaryComparatorFactories, secondaryLowKeyFields, secondaryHighKeyFields, true,
+                true, dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeSearchOp, NC1_ID);
 
         int[] primaryLowKeyFields = { 1 }; // second field from the tuples
@@ -279,13 +284,16 @@
 
         // search primary index
         BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
-                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits, primaryComparatorFactories, primaryLowKeyFields,
-                primaryHighKeyFields, true, true, dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, indexRegistryProvider, primaryBtreeSplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, primaryLowKeyFields, primaryHighKeyFields, true, true,
+                dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, secondaryBtreeSearchOp, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractIntegrationTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractIntegrationTest.java
index 023bdd9..8893567 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractIntegrationTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractIntegrationTest.java
@@ -14,29 +14,39 @@
  */
 package edu.uci.ics.hyracks.tests.integration;
 
+import java.io.BufferedReader;
 import java.io.File;
+import java.io.FileReader;
 import java.io.IOException;
+import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.EnumSet;
 import java.util.List;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import org.apache.commons.io.FileUtils;
 import org.junit.AfterClass;
+import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Rule;
 import org.junit.rules.TemporaryFolder;
 
 import edu.uci.ics.hyracks.api.client.HyracksConnection;
 import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.api.dataset.IHyracksDataset;
+import edu.uci.ics.hyracks.api.dataset.IHyracksDatasetReader;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.client.dataset.HyracksDataset;
 import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
 import edu.uci.ics.hyracks.control.common.controllers.CCConfig;
 import edu.uci.ics.hyracks.control.common.controllers.NCConfig;
 import edu.uci.ics.hyracks.control.nc.NodeControllerService;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ResultFrameTupleAccessor;
+import edu.uci.ics.hyracks.dataflow.common.comm.util.ByteBufferInputStream;
 
 public abstract class AbstractIntegrationTest {
     private static final Logger LOGGER = Logger.getLogger(AbstractIntegrationTest.class.getName());
@@ -80,6 +90,7 @@
         ncConfig1.ccPort = 39001;
         ncConfig1.clusterNetIPAddress = "127.0.0.1";
         ncConfig1.dataIPAddress = "127.0.0.1";
+        ncConfig1.datasetIPAddress = "127.0.0.1";
         ncConfig1.nodeId = NC1_ID;
         nc1 = new NodeControllerService(ncConfig1);
         nc1.start();
@@ -89,6 +100,7 @@
         ncConfig2.ccPort = 39001;
         ncConfig2.clusterNetIPAddress = "127.0.0.1";
         ncConfig2.dataIPAddress = "127.0.0.1";
+        ncConfig2.datasetIPAddress = "127.0.0.1";
         ncConfig2.nodeId = NC2_ID;
         nc2 = new NodeControllerService(ncConfig2);
         nc2.start();
@@ -107,7 +119,7 @@
         cc.stop();
     }
 
-    protected void runTest(JobSpecification spec) throws Exception {
+    protected JobId executeTest(JobSpecification spec) throws Exception {
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info(spec.toJSON().toString(2));
         }
@@ -115,25 +127,72 @@
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info(jobId.toString());
         }
-        hcc.waitForCompletion(jobId);
-        dumpOutputFiles();
+        return jobId;
     }
 
-    private void dumpOutputFiles() {
-        if (LOGGER.isLoggable(Level.INFO)) {
-            for (File f : outputFiles) {
-                if (f.exists() && f.isFile()) {
-                    try {
-                        LOGGER.info("Reading file: " + f.getAbsolutePath() + " in test: " + getClass().getName());
-                        String data = FileUtils.readFileToString(f);
-                        LOGGER.info(data);
-                    } catch (IOException e) {
-                        LOGGER.info("Error reading file: " + f.getAbsolutePath());
-                        LOGGER.info(e.getMessage());
-                    }
+    protected void runTest(JobSpecification spec) throws Exception {
+        JobId jobId = executeTest(spec);
+        hcc.waitForCompletion(jobId);
+    }
+
+    protected List<String> readResults(JobSpecification spec, JobId jobId, ResultSetId resultSetId) throws Exception {
+        int nReaders = 1;
+        ByteBuffer resultBuffer = ByteBuffer.allocate(spec.getFrameSize());
+        resultBuffer.clear();
+
+        IFrameTupleAccessor frameTupleAccessor = new ResultFrameTupleAccessor(spec.getFrameSize());
+
+        IHyracksDataset hyracksDataset = new HyracksDataset(hcc, spec.getFrameSize(), nReaders);
+        IHyracksDatasetReader reader = hyracksDataset.createReader(jobId, resultSetId);
+
+        List<String> resultRecords = new ArrayList<String>();
+        ByteBufferInputStream bbis = new ByteBufferInputStream();
+
+        int readSize = reader.read(resultBuffer);
+
+        while (readSize > 0) {
+
+            try {
+                frameTupleAccessor.reset(resultBuffer);
+                for (int tIndex = 0; tIndex < frameTupleAccessor.getTupleCount(); tIndex++) {
+                    int start = frameTupleAccessor.getTupleStartOffset(tIndex);
+                    int length = frameTupleAccessor.getTupleEndOffset(tIndex) - start;
+                    bbis.setByteBuffer(resultBuffer, start);
+                    byte[] recordBytes = new byte[length];
+                    bbis.read(recordBytes, 0, length);
+                    resultRecords.add(new String(recordBytes, 0, length));
                 }
+            } finally {
+                bbis.close();
             }
+
+            resultBuffer.clear();
+            readSize = reader.read(resultBuffer);
         }
+        return resultRecords;
+    }
+
+    protected boolean runTestAndCompareResults(JobSpecification spec, String[] expectedFileNames) throws Exception {
+        JobId jobId = executeTest(spec);
+
+        List<String> results;
+        for (int i = 0; i < expectedFileNames.length; i++) {
+            results = readResults(spec, jobId, spec.getResultSetIds().get(i));
+            BufferedReader expectedFile = new BufferedReader(new FileReader(expectedFileNames[i]));
+
+            String expectedLine, actualLine;
+            int j = 0;
+            while ((expectedLine = expectedFile.readLine()) != null) {
+                actualLine = results.get(j).trim();
+                Assert.assertEquals(expectedLine, actualLine);
+                j++;
+            }
+            Assert.assertEquals(j, results.size());
+            expectedFile.close();
+        }
+
+        hcc.waitForCompletion(jobId);
+        return true;
     }
 
     protected File createTempFile() throws IOException {
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractMultiNCIntegrationTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractMultiNCIntegrationTest.java
index e0b8c73..24d0ef4 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractMultiNCIntegrationTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AbstractMultiNCIntegrationTest.java
@@ -16,6 +16,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.EnumSet;
 import java.util.List;
@@ -23,6 +24,7 @@
 import java.util.logging.Logger;
 
 import org.apache.commons.io.FileUtils;
+import org.json.JSONArray;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Rule;
@@ -30,13 +32,20 @@
 
 import edu.uci.ics.hyracks.api.client.HyracksConnection;
 import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.api.dataset.IHyracksDataset;
+import edu.uci.ics.hyracks.api.dataset.IHyracksDatasetReader;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.job.JobFlag;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.client.dataset.HyracksDataset;
 import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
 import edu.uci.ics.hyracks.control.common.controllers.CCConfig;
 import edu.uci.ics.hyracks.control.common.controllers.NCConfig;
 import edu.uci.ics.hyracks.control.nc.NodeControllerService;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.ResultFrameTupleAccessor;
+import edu.uci.ics.hyracks.dataflow.common.comm.util.ByteBufferInputStream;
 
 public abstract class AbstractMultiNCIntegrationTest {
 
@@ -84,6 +93,7 @@
             ncConfig.ccPort = 39001;
             ncConfig.clusterNetIPAddress = "127.0.0.1";
             ncConfig.dataIPAddress = "127.0.0.1";
+            ncConfig.datasetIPAddress = "127.0.0.1";
             ncConfig.nodeId = ASTERIX_IDS[i];
             asterixNCs[i] = new NodeControllerService(ncConfig);
             asterixNCs[i].start();
@@ -112,6 +122,46 @@
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info(jobId.toString());
         }
+
+        int nReaders = 1;
+
+        ByteBuffer resultBuffer = ByteBuffer.allocate(spec.getFrameSize());
+        resultBuffer.clear();
+
+        IFrameTupleAccessor frameTupleAccessor = new ResultFrameTupleAccessor(spec.getFrameSize());
+
+        IHyracksDataset hyracksDataset = new HyracksDataset(hcc, spec.getFrameSize(), nReaders);
+        IHyracksDatasetReader reader = hyracksDataset.createReader(jobId, spec.getResultSetIds().get(0));
+
+        JSONArray resultRecords = new JSONArray();
+        ByteBufferInputStream bbis = new ByteBufferInputStream();
+
+        int readSize = reader.read(resultBuffer);
+
+        while (readSize > 0) {
+
+            try {
+                frameTupleAccessor.reset(resultBuffer);
+                for (int tIndex = 0; tIndex < frameTupleAccessor.getTupleCount(); tIndex++) {
+                    int start = frameTupleAccessor.getTupleStartOffset(tIndex);
+                    int length = frameTupleAccessor.getTupleEndOffset(tIndex) - start;
+                    bbis.setByteBuffer(resultBuffer, start);
+                    byte[] recordBytes = new byte[length];
+                    bbis.read(recordBytes, 0, length);
+                    resultRecords.put(new String(recordBytes, 0, length));
+                }
+            } finally {
+                try {
+                    bbis.close();
+                } catch (IOException e) {
+                    throw new HyracksDataException(e);
+                }
+            }
+
+            resultBuffer.clear();
+            readSize = reader.read(resultBuffer);
+        }
+
         hcc.waitForCompletion(jobId);
         dumpOutputFiles();
     }
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AggregationTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AggregationTest.java
index 93e1e9b..06751e3 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AggregationTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/AggregationTest.java
@@ -25,8 +25,8 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryHashFunctionFactory;
@@ -49,7 +49,6 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.dataflow.std.file.ITupleParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.group.HashSpillableTableFactory;
 import edu.uci.ics.hyracks.dataflow.std.group.IFieldAggregateDescriptorFactory;
 import edu.uci.ics.hyracks.dataflow.std.group.aggregators.AvgFieldGroupAggregatorFactory;
@@ -62,60 +61,42 @@
 import edu.uci.ics.hyracks.dataflow.std.group.external.ExternalGroupOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.group.hash.HashGroupOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.group.preclustered.PreclusteredGroupOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 /**
  *
  */
 public class AggregationTest extends AbstractIntegrationTest {
 
-    final IFileSplitProvider splitProvider = new ConstantFileSplitProvider(
-            new FileSplit[] { new FileSplit(NC2_ID, new FileReference(new File(
-                    "data/tpch0.001/lineitem.tbl"))) });
+    final IFileSplitProvider splitProvider = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC2_ID,
+            new FileReference(new File("data/tpch0.001/lineitem.tbl"))) });
 
-    final RecordDescriptor desc = new RecordDescriptor(
-            new ISerializerDeserializer[] {
-                    UTF8StringSerializerDeserializer.INSTANCE,
-                    IntegerSerializerDeserializer.INSTANCE,
-                    IntegerSerializerDeserializer.INSTANCE,
-                    IntegerSerializerDeserializer.INSTANCE,
-                    IntegerSerializerDeserializer.INSTANCE,
-                    FloatSerializerDeserializer.INSTANCE,
-                    FloatSerializerDeserializer.INSTANCE,
-                    FloatSerializerDeserializer.INSTANCE,
-                    UTF8StringSerializerDeserializer.INSTANCE,
-                    UTF8StringSerializerDeserializer.INSTANCE,
-                    UTF8StringSerializerDeserializer.INSTANCE,
-                    UTF8StringSerializerDeserializer.INSTANCE,
-                    UTF8StringSerializerDeserializer.INSTANCE,
-                    UTF8StringSerializerDeserializer.INSTANCE,
-                    UTF8StringSerializerDeserializer.INSTANCE,
-                    UTF8StringSerializerDeserializer.INSTANCE });
+    final RecordDescriptor desc = new RecordDescriptor(new ISerializerDeserializer[] {
+            UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+            IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+            IntegerSerializerDeserializer.INSTANCE, FloatSerializerDeserializer.INSTANCE,
+            FloatSerializerDeserializer.INSTANCE, FloatSerializerDeserializer.INSTANCE,
+            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+            UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
 
-    final ITupleParserFactory tupleParserFactory = new DelimitedDataTupleParserFactory(
-            new IValueParserFactory[] { UTF8StringParserFactory.INSTANCE,
-                    IntegerParserFactory.INSTANCE,
-                    IntegerParserFactory.INSTANCE,
-                    IntegerParserFactory.INSTANCE,
-                    IntegerParserFactory.INSTANCE, FloatParserFactory.INSTANCE,
-                    FloatParserFactory.INSTANCE, FloatParserFactory.INSTANCE,
-                    UTF8StringParserFactory.INSTANCE,
-                    UTF8StringParserFactory.INSTANCE,
-                    UTF8StringParserFactory.INSTANCE,
-                    UTF8StringParserFactory.INSTANCE,
-                    UTF8StringParserFactory.INSTANCE,
-                    UTF8StringParserFactory.INSTANCE,
-                    UTF8StringParserFactory.INSTANCE,
-                    UTF8StringParserFactory.INSTANCE, }, '|');
+    final ITupleParserFactory tupleParserFactory = new DelimitedDataTupleParserFactory(new IValueParserFactory[] {
+            UTF8StringParserFactory.INSTANCE, IntegerParserFactory.INSTANCE, IntegerParserFactory.INSTANCE,
+            IntegerParserFactory.INSTANCE, IntegerParserFactory.INSTANCE, FloatParserFactory.INSTANCE,
+            FloatParserFactory.INSTANCE, FloatParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+            UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+            UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE,
+            UTF8StringParserFactory.INSTANCE, }, '|');
 
-    private AbstractSingleActivityOperatorDescriptor getPrinter(
-            IOperatorDescriptorRegistry spec, String prefix) throws IOException {
+    private AbstractSingleActivityOperatorDescriptor getPrinter(JobSpecification spec, String prefix)
+            throws IOException {
 
-        AbstractSingleActivityOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(
-                spec, new ConstantFileSplitProvider(new FileSplit[] {
-                        new FileSplit(NC1_ID, createTempFile()
-                                .getAbsolutePath()),
-                        new FileSplit(NC2_ID, createTempFile()
-                                .getAbsolutePath()) }), "\t");
+        ResultSetId rsId = new ResultSetId(1);
+        AbstractSingleActivityOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
+        spec.addResultSetId(rsId);
 
         return printer;
     }
@@ -124,54 +105,38 @@
     public void singleKeySumInmemGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        FloatSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, FloatSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 0 };
         int tableSize = 8;
 
-        HashGroupOperatorDescriptor grouper = new HashGroupOperatorDescriptor(
-                spec,
-                keyFields,
-                new FieldHashPartitionComputerFactory(
-                        keyFields,
+        HashGroupOperatorDescriptor grouper = new HashGroupOperatorDescriptor(spec, keyFields,
+                new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
                                 .of(UTF8StringPointable.FACTORY) }),
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-                        .of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, true),
-                                new IntSumFieldAggregatorFactory(3, true),
-                                new FloatSumFieldAggregatorFactory(5, true) }),
-                outputRec, tableSize);
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, true), new IntSumFieldAggregatorFactory(3, true),
+                        new FloatSumFieldAggregatorFactory(5, true) }), outputRec, tableSize);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec,
-                new FieldHashPartitionComputerFactory(
-                        keyFields,
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
                                 .of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "singleKeySumInmemGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "singleKeySumInmemGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -184,49 +149,34 @@
     public void singleKeySumPreClusterGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        FloatSerializerDeserializer.INSTANCE});
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, FloatSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 0 };
 
-        PreclusteredGroupOperatorDescriptor grouper = new PreclusteredGroupOperatorDescriptor(
-                spec,
-                keyFields,
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-                        .of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, true),
-                                new IntSumFieldAggregatorFactory(3, true),
-                                new FloatSumFieldAggregatorFactory(5, true)}),
-                outputRec);
+        PreclusteredGroupOperatorDescriptor grouper = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, true), new IntSumFieldAggregatorFactory(3, true),
+                        new FloatSumFieldAggregatorFactory(5, true) }), outputRec);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec,
-                new FieldHashPartitionComputerFactory(
-                        keyFields,
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
                                 .of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "singleKeySumInmemGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "singleKeySumInmemGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -239,64 +189,43 @@
     public void singleKeySumExtGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        FloatSerializerDeserializer.INSTANCE});
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, FloatSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 0 };
         int frameLimits = 4;
         int tableSize = 8;
 
-        ExternalGroupOperatorDescriptor grouper = new ExternalGroupOperatorDescriptor(
-                spec,
-                keyFields,
-                frameLimits,
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-                        .of(UTF8StringPointable.FACTORY) },
-                new UTF8StringNormalizedKeyComputerFactory(),
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, false),
+        ExternalGroupOperatorDescriptor grouper = new ExternalGroupOperatorDescriptor(spec, keyFields, frameLimits,
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new UTF8StringNormalizedKeyComputerFactory(), new MultiFieldsAggregatorFactory(
+                        new IFieldAggregateDescriptorFactory[] { new IntSumFieldAggregatorFactory(1, false),
                                 new IntSumFieldAggregatorFactory(3, false),
-                                new FloatSumFieldAggregatorFactory(5, false)}),
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, false),
+                                new FloatSumFieldAggregatorFactory(5, false) }), new MultiFieldsAggregatorFactory(
+                        new IFieldAggregateDescriptorFactory[] { new IntSumFieldAggregatorFactory(1, false),
                                 new IntSumFieldAggregatorFactory(2, false),
-                                new FloatSumFieldAggregatorFactory(3, false)}),
-                outputRec,
-                new HashSpillableTableFactory(
-                        new FieldHashPartitionComputerFactory(
-                                keyFields,
-                                new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }),
-                        tableSize), true);
+                                new FloatSumFieldAggregatorFactory(3, false) }), outputRec,
+                new HashSpillableTableFactory(new FieldHashPartitionComputerFactory(keyFields,
+                        new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
+                                .of(UTF8StringPointable.FACTORY) }), tableSize), true);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec,
-                new FieldHashPartitionComputerFactory(
-                        keyFields,
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
                                 .of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "singleKeySumExtGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "singleKeySumExtGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -309,54 +238,38 @@
     public void singleKeyAvgInmemGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        FloatSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, FloatSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 0 };
         int tableSize = 8;
 
-        HashGroupOperatorDescriptor grouper = new HashGroupOperatorDescriptor(
-                spec,
-                keyFields,
-                new FieldHashPartitionComputerFactory(
-                        keyFields,
+        HashGroupOperatorDescriptor grouper = new HashGroupOperatorDescriptor(spec, keyFields,
+                new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
                                 .of(UTF8StringPointable.FACTORY) }),
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-                        .of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, true),
-                                new CountFieldAggregatorFactory(true),
-                                new AvgFieldGroupAggregatorFactory(1, true) }),
-                outputRec, tableSize);
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, true), new CountFieldAggregatorFactory(true),
+                        new AvgFieldGroupAggregatorFactory(1, true) }), outputRec, tableSize);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec,
-                new FieldHashPartitionComputerFactory(
-                        keyFields,
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
                                 .of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "singleKeyAvgInmemGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "singleKeyAvgInmemGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -369,49 +282,34 @@
     public void singleKeyAvgPreClusterGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        FloatSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, FloatSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 0 };
 
-        PreclusteredGroupOperatorDescriptor grouper = new PreclusteredGroupOperatorDescriptor(
-                spec,
-                keyFields,
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-                        .of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, true),
-                                new CountFieldAggregatorFactory(true),
-                                new AvgFieldGroupAggregatorFactory(1, true) }),
-                outputRec);
+        PreclusteredGroupOperatorDescriptor grouper = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, true), new CountFieldAggregatorFactory(true),
+                        new AvgFieldGroupAggregatorFactory(1, true) }), outputRec);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec,
-                new FieldHashPartitionComputerFactory(
-                        keyFields,
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
                                 .of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "singleKeyAvgInmemGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "singleKeyAvgInmemGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -424,64 +322,43 @@
     public void singleKeyAvgExtGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        FloatSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, FloatSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 0 };
         int frameLimits = 4;
         int tableSize = 8;
 
-        ExternalGroupOperatorDescriptor grouper = new ExternalGroupOperatorDescriptor(
-                spec,
-                keyFields,
-                frameLimits,
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-                        .of(UTF8StringPointable.FACTORY) },
+        ExternalGroupOperatorDescriptor grouper = new ExternalGroupOperatorDescriptor(spec, keyFields, frameLimits,
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
                 new UTF8StringNormalizedKeyComputerFactory(),
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, false),
-                                new CountFieldAggregatorFactory(false),
-                                new AvgFieldGroupAggregatorFactory(1, false) }),
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, false),
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, false), new CountFieldAggregatorFactory(false),
+                        new AvgFieldGroupAggregatorFactory(1, false) }), new MultiFieldsAggregatorFactory(
+                        new IFieldAggregateDescriptorFactory[] { new IntSumFieldAggregatorFactory(1, false),
                                 new IntSumFieldAggregatorFactory(2, false),
-                                new AvgFieldMergeAggregatorFactory(3, false) }),
-                outputRec,
-                new HashSpillableTableFactory(
-                        new FieldHashPartitionComputerFactory(
-                                keyFields,
-                                new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }),
-                        tableSize), true);
+                                new AvgFieldMergeAggregatorFactory(3, false) }), outputRec,
+                new HashSpillableTableFactory(new FieldHashPartitionComputerFactory(keyFields,
+                        new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
+                                .of(UTF8StringPointable.FACTORY) }), tableSize), true);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec,
-                new FieldHashPartitionComputerFactory(
-                        keyFields,
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
                                 .of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "singleKeyAvgExtGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "singleKeyAvgExtGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -494,52 +371,38 @@
     public void singleKeyMinMaxStringInmemGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 0 };
         int tableSize = 8;
 
-        HashGroupOperatorDescriptor grouper = new HashGroupOperatorDescriptor(
-                spec,
-                keyFields,
-                new FieldHashPartitionComputerFactory(
-                        keyFields,
+        HashGroupOperatorDescriptor grouper = new HashGroupOperatorDescriptor(spec, keyFields,
+                new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
                                 .of(UTF8StringPointable.FACTORY) }),
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-                        .of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, true),
-                                new MinMaxStringFieldAggregatorFactory(15,
-                                        true, false) }), outputRec, tableSize);
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, true),
+                        new MinMaxStringFieldAggregatorFactory(15, true, false) }), outputRec, tableSize);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec,
-                new FieldHashPartitionComputerFactory(
-                        keyFields,
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
                                 .of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "singleKeyAvgInmemGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "singleKeyAvgInmemGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -552,47 +415,34 @@
     public void singleKeyMinMaxStringPreClusterGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 0 };
 
-        PreclusteredGroupOperatorDescriptor grouper = new PreclusteredGroupOperatorDescriptor(
-                spec,
-                keyFields,
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-                        .of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, true),
-                                new MinMaxStringFieldAggregatorFactory(15,
-                                        true, false) }), outputRec);
+        PreclusteredGroupOperatorDescriptor grouper = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, true),
+                        new MinMaxStringFieldAggregatorFactory(15, true, false) }), outputRec);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec,
-                new FieldHashPartitionComputerFactory(
-                        keyFields,
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
                                 .of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "singleKeyAvgInmemGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "singleKeyAvgInmemGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -605,63 +455,42 @@
     public void singleKeyMinMaxStringExtGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                UTF8StringSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 0 };
         int frameLimits = 4;
         int tableSize = 8;
 
-        ExternalGroupOperatorDescriptor grouper = new ExternalGroupOperatorDescriptor(
-                spec,
-                keyFields,
-                frameLimits,
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-                        .of(UTF8StringPointable.FACTORY) },
-                new UTF8StringNormalizedKeyComputerFactory(),
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, false),
-                                new MinMaxStringFieldAggregatorFactory(15,
-                                        true, true) }),
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, false),
-                                new MinMaxStringFieldAggregatorFactory(2, true,
-                                        true) }),
-                outputRec,
-                new HashSpillableTableFactory(
-                        new FieldHashPartitionComputerFactory(
-                                keyFields,
-                                new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }),
-                        tableSize), true);
+        ExternalGroupOperatorDescriptor grouper = new ExternalGroupOperatorDescriptor(spec, keyFields, frameLimits,
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new UTF8StringNormalizedKeyComputerFactory(), new MultiFieldsAggregatorFactory(
+                        new IFieldAggregateDescriptorFactory[] { new IntSumFieldAggregatorFactory(1, false),
+                                new MinMaxStringFieldAggregatorFactory(15, true, true) }),
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, false),
+                        new MinMaxStringFieldAggregatorFactory(2, true, true) }), outputRec,
+                new HashSpillableTableFactory(new FieldHashPartitionComputerFactory(keyFields,
+                        new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
+                                .of(UTF8StringPointable.FACTORY) }), tableSize), true);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec,
-                new FieldHashPartitionComputerFactory(
-                        keyFields,
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
                                 .of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "singleKeyAvgExtGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "singleKeyAvgExtGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -674,58 +503,39 @@
     public void multiKeySumInmemGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 8, 0 };
         int tableSize = 8;
 
-        HashGroupOperatorDescriptor grouper = new HashGroupOperatorDescriptor(
-                spec, keyFields, new FieldHashPartitionComputerFactory(
-                        keyFields,
-                        new IBinaryHashFunctionFactory[] {
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY),
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }),
-                new IBinaryComparatorFactory[] {
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY),
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, true),
-                                new IntSumFieldAggregatorFactory(3, true) }),
+        HashGroupOperatorDescriptor grouper = new HashGroupOperatorDescriptor(spec, keyFields,
+                new FieldHashPartitionComputerFactory(keyFields, new IBinaryHashFunctionFactory[] {
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }),
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, true), new IntSumFieldAggregatorFactory(3, true) }),
                 outputRec, tableSize);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec, new FieldHashPartitionComputerFactory(keyFields,
-                        new IBinaryHashFunctionFactory[] {
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY),
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }));
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields, new IBinaryHashFunctionFactory[] {
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "multiKeySumInmemGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "multiKeySumInmemGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -738,51 +548,35 @@
     public void multiKeySumPreClusterGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 8, 0 };
 
-        PreclusteredGroupOperatorDescriptor grouper = new PreclusteredGroupOperatorDescriptor(
-                spec, keyFields,
-                new IBinaryComparatorFactory[] {
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY),
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, true),
-                                new IntSumFieldAggregatorFactory(3, true) }),
+        PreclusteredGroupOperatorDescriptor grouper = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, true), new IntSumFieldAggregatorFactory(3, true) }),
                 outputRec);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec, new FieldHashPartitionComputerFactory(keyFields,
-                        new IBinaryHashFunctionFactory[] {
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY),
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }));
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields, new IBinaryHashFunctionFactory[] {
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "multiKeySumInmemGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "multiKeySumInmemGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -795,69 +589,43 @@
     public void multiKeySumExtGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 8, 0 };
         int frameLimits = 4;
         int tableSize = 8;
 
-        ExternalGroupOperatorDescriptor grouper = new ExternalGroupOperatorDescriptor(
-                spec,
-                keyFields,
-                frameLimits,
-                new IBinaryComparatorFactory[] {
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY),
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY) },
-                new UTF8StringNormalizedKeyComputerFactory(),
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, false),
-                                new IntSumFieldAggregatorFactory(3, false) }),
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(2, false),
-                                new IntSumFieldAggregatorFactory(3, false) }),
-                outputRec,
-                new HashSpillableTableFactory(
-                        new FieldHashPartitionComputerFactory(
-                                keyFields,
-                                new IBinaryHashFunctionFactory[] {
-                                        PointableBinaryHashFunctionFactory
-                                                .of(UTF8StringPointable.FACTORY),
-                                        PointableBinaryHashFunctionFactory
-                                                .of(UTF8StringPointable.FACTORY) }),
-                        tableSize), true);
-
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
-
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec, new FieldHashPartitionComputerFactory(keyFields,
+        ExternalGroupOperatorDescriptor grouper = new ExternalGroupOperatorDescriptor(spec, keyFields, frameLimits,
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new UTF8StringNormalizedKeyComputerFactory(), new MultiFieldsAggregatorFactory(
+                        new IFieldAggregateDescriptorFactory[] { new IntSumFieldAggregatorFactory(1, false),
+                                new IntSumFieldAggregatorFactory(3, false) }), new MultiFieldsAggregatorFactory(
+                        new IFieldAggregateDescriptorFactory[] { new IntSumFieldAggregatorFactory(2, false),
+                                new IntSumFieldAggregatorFactory(3, false) }), outputRec,
+                new HashSpillableTableFactory(new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] {
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY),
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }));
+                                PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                                PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }), tableSize), true);
+
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
+
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields, new IBinaryHashFunctionFactory[] {
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "multiKeySumExtGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "multiKeySumExtGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -870,60 +638,40 @@
     public void multiKeyAvgInmemGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        FloatSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                FloatSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 8, 0 };
         int tableSize = 8;
 
-        HashGroupOperatorDescriptor grouper = new HashGroupOperatorDescriptor(
-                spec, keyFields, new FieldHashPartitionComputerFactory(
-                        keyFields,
-                        new IBinaryHashFunctionFactory[] {
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY),
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }),
-                new IBinaryComparatorFactory[] {
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY),
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, true),
-                                new CountFieldAggregatorFactory(true),
-                                new AvgFieldGroupAggregatorFactory(1, true) }),
-                outputRec, tableSize);
+        HashGroupOperatorDescriptor grouper = new HashGroupOperatorDescriptor(spec, keyFields,
+                new FieldHashPartitionComputerFactory(keyFields, new IBinaryHashFunctionFactory[] {
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }),
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, true), new CountFieldAggregatorFactory(true),
+                        new AvgFieldGroupAggregatorFactory(1, true) }), outputRec, tableSize);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec, new FieldHashPartitionComputerFactory(keyFields,
-                        new IBinaryHashFunctionFactory[] {
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY),
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }));
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields, new IBinaryHashFunctionFactory[] {
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "multiKeyAvgInmemGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "multiKeyAvgInmemGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -936,53 +684,36 @@
     public void multiKeyAvgPreClusterGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        FloatSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                FloatSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 8, 0 };
 
-        PreclusteredGroupOperatorDescriptor grouper = new PreclusteredGroupOperatorDescriptor(
-                spec, keyFields,
-                new IBinaryComparatorFactory[] {
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY),
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, true),
-                                new CountFieldAggregatorFactory(true),
-                                new AvgFieldGroupAggregatorFactory(1, true) }),
-                outputRec);
+        PreclusteredGroupOperatorDescriptor grouper = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, true), new CountFieldAggregatorFactory(true),
+                        new AvgFieldGroupAggregatorFactory(1, true) }), outputRec);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec, new FieldHashPartitionComputerFactory(keyFields,
-                        new IBinaryHashFunctionFactory[] {
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY),
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }));
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields, new IBinaryHashFunctionFactory[] {
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "multiKeyAvgInmemGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "multiKeyAvgInmemGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -995,72 +726,46 @@
     public void multiKeyAvgExtGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        FloatSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE,
+                FloatSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 8, 0 };
         int frameLimits = 4;
         int tableSize = 8;
 
-        ExternalGroupOperatorDescriptor grouper = new ExternalGroupOperatorDescriptor(
-                spec,
-                keyFields,
-                frameLimits,
-                new IBinaryComparatorFactory[] {
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY),
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY) },
+        ExternalGroupOperatorDescriptor grouper = new ExternalGroupOperatorDescriptor(spec, keyFields, frameLimits,
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
                 new UTF8StringNormalizedKeyComputerFactory(),
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, false),
-                                new CountFieldAggregatorFactory(false),
-                                new AvgFieldGroupAggregatorFactory(1, false) }),
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(2, false),
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, false), new CountFieldAggregatorFactory(false),
+                        new AvgFieldGroupAggregatorFactory(1, false) }), new MultiFieldsAggregatorFactory(
+                        new IFieldAggregateDescriptorFactory[] { new IntSumFieldAggregatorFactory(2, false),
                                 new IntSumFieldAggregatorFactory(3, false),
-                                new AvgFieldMergeAggregatorFactory(4, false) }),
-                outputRec,
-                new HashSpillableTableFactory(
-                        new FieldHashPartitionComputerFactory(
-                                keyFields,
-                                new IBinaryHashFunctionFactory[] {
-                                        PointableBinaryHashFunctionFactory
-                                                .of(UTF8StringPointable.FACTORY),
-                                        PointableBinaryHashFunctionFactory
-                                                .of(UTF8StringPointable.FACTORY) }),
-                        tableSize), true);
-
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
-
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec, new FieldHashPartitionComputerFactory(keyFields,
+                                new AvgFieldMergeAggregatorFactory(4, false) }), outputRec,
+                new HashSpillableTableFactory(new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] {
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY),
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }));
+                                PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                                PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }), tableSize), true);
+
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
+
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields, new IBinaryHashFunctionFactory[] {
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "multiKeyAvgExtGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "multiKeyAvgExtGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -1073,58 +778,39 @@
     public void multiKeyMinMaxStringInmemGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 8, 0 };
         int tableSize = 8;
 
-        HashGroupOperatorDescriptor grouper = new HashGroupOperatorDescriptor(
-                spec, keyFields, new FieldHashPartitionComputerFactory(
-                        keyFields,
-                        new IBinaryHashFunctionFactory[] {
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY),
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }),
-                new IBinaryComparatorFactory[] {
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY),
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, true),
-                                new MinMaxStringFieldAggregatorFactory(15,
-                                        true, false) }), outputRec, tableSize);
+        HashGroupOperatorDescriptor grouper = new HashGroupOperatorDescriptor(spec, keyFields,
+                new FieldHashPartitionComputerFactory(keyFields, new IBinaryHashFunctionFactory[] {
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }),
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, true),
+                        new MinMaxStringFieldAggregatorFactory(15, true, false) }), outputRec, tableSize);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec, new FieldHashPartitionComputerFactory(keyFields,
-                        new IBinaryHashFunctionFactory[] {
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY),
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }));
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields, new IBinaryHashFunctionFactory[] {
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "multiKeyMinMaxStringInmemGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "multiKeyMinMaxStringInmemGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -1137,51 +823,35 @@
     public void multiKeyMinMaxStringPreClusterGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 8, 0 };
 
-        PreclusteredGroupOperatorDescriptor grouper = new PreclusteredGroupOperatorDescriptor(
-                spec, keyFields,
-                new IBinaryComparatorFactory[] {
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY),
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, true),
-                                new MinMaxStringFieldAggregatorFactory(15,
-                                        true, false) }), outputRec);
+        PreclusteredGroupOperatorDescriptor grouper = new PreclusteredGroupOperatorDescriptor(spec, keyFields,
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(1, true),
+                        new MinMaxStringFieldAggregatorFactory(15, true, false) }), outputRec);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
 
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec, new FieldHashPartitionComputerFactory(keyFields,
-                        new IBinaryHashFunctionFactory[] {
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY),
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }));
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields, new IBinaryHashFunctionFactory[] {
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "multiKeyMinMaxStringPreClusterGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "multiKeyMinMaxStringPreClusterGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
@@ -1194,71 +864,44 @@
     public void multiKeyMinMaxStringExtGroupTest() throws Exception {
         JobSpecification spec = new JobSpecification();
 
-        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(
-                spec, splitProvider, tupleParserFactory, desc);
+        FileScanOperatorDescriptor csvScanner = new FileScanOperatorDescriptor(spec, splitProvider, tupleParserFactory,
+                desc);
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-                csvScanner, NC2_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID);
 
-        RecordDescriptor outputRec = new RecordDescriptor(
-                new ISerializerDeserializer[] {
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE,
-                        IntegerSerializerDeserializer.INSTANCE,
-                        UTF8StringSerializerDeserializer.INSTANCE });
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                UTF8StringSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE, UTF8StringSerializerDeserializer.INSTANCE });
 
         int[] keyFields = new int[] { 8, 0 };
         int frameLimits = 4;
         int tableSize = 8;
 
-        ExternalGroupOperatorDescriptor grouper = new ExternalGroupOperatorDescriptor(
-                spec,
-                keyFields,
-                frameLimits,
-                new IBinaryComparatorFactory[] {
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY),
-                        PointableBinaryComparatorFactory
-                                .of(UTF8StringPointable.FACTORY) },
-                new UTF8StringNormalizedKeyComputerFactory(),
-                new MultiFieldsAggregatorFactory(
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(1, false),
-                                new MinMaxStringFieldAggregatorFactory(15,
-                                        true, true) }),
-                new MultiFieldsAggregatorFactory(new int[] { 0, 1 },
-                        new IFieldAggregateDescriptorFactory[] {
-                                new IntSumFieldAggregatorFactory(2, false),
-                                new MinMaxStringFieldAggregatorFactory(3, true,
-                                        true) }),
-                outputRec,
-                new HashSpillableTableFactory(
-                        new FieldHashPartitionComputerFactory(
-                                keyFields,
-                                new IBinaryHashFunctionFactory[] {
-                                        PointableBinaryHashFunctionFactory
-                                                .of(UTF8StringPointable.FACTORY),
-                                        PointableBinaryHashFunctionFactory
-                                                .of(UTF8StringPointable.FACTORY) }),
-                        tableSize), true);
-
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper,
-                NC2_ID, NC1_ID);
-
-        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(
-                spec, new FieldHashPartitionComputerFactory(keyFields,
+        ExternalGroupOperatorDescriptor grouper = new ExternalGroupOperatorDescriptor(spec, keyFields, frameLimits,
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
+                new UTF8StringNormalizedKeyComputerFactory(), new MultiFieldsAggregatorFactory(
+                        new IFieldAggregateDescriptorFactory[] { new IntSumFieldAggregatorFactory(1, false),
+                                new MinMaxStringFieldAggregatorFactory(15, true, true) }),
+                new MultiFieldsAggregatorFactory(new int[] { 0, 1 }, new IFieldAggregateDescriptorFactory[] {
+                        new IntSumFieldAggregatorFactory(2, false),
+                        new MinMaxStringFieldAggregatorFactory(3, true, true) }), outputRec,
+                new HashSpillableTableFactory(new FieldHashPartitionComputerFactory(keyFields,
                         new IBinaryHashFunctionFactory[] {
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY),
-                                PointableBinaryHashFunctionFactory
-                                        .of(UTF8StringPointable.FACTORY) }));
+                                PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                                PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }), tableSize), true);
+
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, grouper, NC2_ID, NC1_ID);
+
+        IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
+                new FieldHashPartitionComputerFactory(keyFields, new IBinaryHashFunctionFactory[] {
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY),
+                        PointableBinaryHashFunctionFactory.of(UTF8StringPointable.FACTORY) }));
         spec.connect(conn1, csvScanner, 0, grouper, 0);
 
-        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec,
-                "multiKeyMinMaxStringExtGroupTest");
+        AbstractSingleActivityOperatorDescriptor printer = getPrinter(spec, "multiKeyMinMaxStringExtGroupTest");
 
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-                NC2_ID, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn2 = new OneToOneConnectorDescriptor(spec);
         spec.connect(conn2, grouper, 0, printer, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/CountOfCountsTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/CountOfCountsTest.java
index aea6126..5008991 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/CountOfCountsTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/CountOfCountsTest.java
@@ -25,6 +25,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
@@ -44,13 +45,14 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.group.IFieldAggregateDescriptorFactory;
 import edu.uci.ics.hyracks.dataflow.std.group.aggregators.CountFieldAggregatorFactory;
 import edu.uci.ics.hyracks.dataflow.std.group.aggregators.MultiFieldsAggregatorFactory;
 import edu.uci.ics.hyracks.dataflow.std.group.preclustered.PreclusteredGroupOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.sort.InMemorySortOperatorDescriptor;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class CountOfCountsTest extends AbstractIntegrationTest {
     @Test
@@ -76,12 +78,10 @@
 
         RecordDescriptor desc2 = new RecordDescriptor(new ISerializerDeserializer[] {
                 UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE });
-        PreclusteredGroupOperatorDescriptor group = new PreclusteredGroupOperatorDescriptor(
-                spec,
-                new int[] { 0 },
+        PreclusteredGroupOperatorDescriptor group = new PreclusteredGroupOperatorDescriptor(spec, new int[] { 0 },
                 new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] { new CountFieldAggregatorFactory(true) }),
-                desc2);
+                new MultiFieldsAggregatorFactory(
+                        new IFieldAggregateDescriptorFactory[] { new CountFieldAggregatorFactory(true) }), desc2);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, group, NC1_ID);
 
         InMemorySortOperatorDescriptor sorter2 = new InMemorySortOperatorDescriptor(spec, new int[] { 1 },
@@ -91,13 +91,15 @@
         RecordDescriptor desc3 = new RecordDescriptor(new ISerializerDeserializer[] {
                 IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE });
         PreclusteredGroupOperatorDescriptor group2 = new PreclusteredGroupOperatorDescriptor(spec, new int[] { 1 },
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY) }, new MultiFieldsAggregatorFactory(
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(
                         new IFieldAggregateDescriptorFactory[] { new CountFieldAggregatorFactory(true) }), desc3);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, group2, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
+        spec.addResultSetId(rsId);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
@@ -148,12 +150,10 @@
 
         RecordDescriptor desc2 = new RecordDescriptor(new ISerializerDeserializer[] {
                 UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE });
-        PreclusteredGroupOperatorDescriptor group = new PreclusteredGroupOperatorDescriptor(
-                spec,
-                new int[] { 0 },
+        PreclusteredGroupOperatorDescriptor group = new PreclusteredGroupOperatorDescriptor(spec, new int[] { 0 },
                 new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] { new CountFieldAggregatorFactory(true) }),
-                desc2);
+                new MultiFieldsAggregatorFactory(
+                        new IFieldAggregateDescriptorFactory[] { new CountFieldAggregatorFactory(true) }), desc2);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, group, NC1_ID, NC2_ID, NC1_ID, NC2_ID);
 
         InMemorySortOperatorDescriptor sorter2 = new InMemorySortOperatorDescriptor(spec, new int[] { 1 },
@@ -163,13 +163,16 @@
         RecordDescriptor desc3 = new RecordDescriptor(new ISerializerDeserializer[] {
                 IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE });
         PreclusteredGroupOperatorDescriptor group2 = new PreclusteredGroupOperatorDescriptor(spec, new int[] { 1 },
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY) }, new MultiFieldsAggregatorFactory(
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(
                         new IFieldAggregateDescriptorFactory[] { new CountFieldAggregatorFactory(true) }), desc3);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, group2, NC1_ID, NC2_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
+        spec.addResultSetId(rsId);
+
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
@@ -220,12 +223,10 @@
 
         RecordDescriptor desc2 = new RecordDescriptor(new ISerializerDeserializer[] {
                 UTF8StringSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE });
-        PreclusteredGroupOperatorDescriptor group = new PreclusteredGroupOperatorDescriptor(
-                spec,
-                new int[] { 0 },
+        PreclusteredGroupOperatorDescriptor group = new PreclusteredGroupOperatorDescriptor(spec, new int[] { 0 },
                 new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
-                new MultiFieldsAggregatorFactory(new IFieldAggregateDescriptorFactory[] { new CountFieldAggregatorFactory(true) }),
-                desc2);
+                new MultiFieldsAggregatorFactory(
+                        new IFieldAggregateDescriptorFactory[] { new CountFieldAggregatorFactory(true) }), desc2);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, group, NC1_ID, NC2_ID, NC1_ID, NC2_ID);
 
         InMemorySortOperatorDescriptor sorter2 = new InMemorySortOperatorDescriptor(spec, new int[] { 1 },
@@ -235,13 +236,16 @@
         RecordDescriptor desc3 = new RecordDescriptor(new ISerializerDeserializer[] {
                 IntegerSerializerDeserializer.INSTANCE, IntegerSerializerDeserializer.INSTANCE });
         PreclusteredGroupOperatorDescriptor group2 = new PreclusteredGroupOperatorDescriptor(spec, new int[] { 1 },
-                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY) }, new MultiFieldsAggregatorFactory(
+                new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(IntegerPointable.FACTORY) },
+                new MultiFieldsAggregatorFactory(
                         new IFieldAggregateDescriptorFactory[] { new CountFieldAggregatorFactory(true) }), desc3);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, group2, NC1_ID, NC2_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
+        spec.addResultSetId(rsId);
+
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/LocalityAwareConnectorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/LocalityAwareConnectorTest.java
index 0d5a627..93ed2c7 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/LocalityAwareConnectorTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/LocalityAwareConnectorTest.java
@@ -26,8 +26,8 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryHashFunctionFactory;
@@ -52,12 +52,13 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.dataflow.std.file.ITupleParserFactory;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.group.IFieldAggregateDescriptorFactory;
 import edu.uci.ics.hyracks.dataflow.std.group.aggregators.FloatSumFieldAggregatorFactory;
 import edu.uci.ics.hyracks.dataflow.std.group.aggregators.IntSumFieldAggregatorFactory;
 import edu.uci.ics.hyracks.dataflow.std.group.aggregators.MultiFieldsAggregatorFactory;
 import edu.uci.ics.hyracks.dataflow.std.group.hash.HashGroupOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class LocalityAwareConnectorTest extends AbstractMultiNCIntegrationTest {
 
@@ -200,13 +201,13 @@
         runTest(spec);
     }
 
-    private AbstractSingleActivityOperatorDescriptor getPrinter(IOperatorDescriptorRegistry spec, String prefix)
+    private AbstractSingleActivityOperatorDescriptor getPrinter(JobSpecification spec, String prefix)
             throws IOException {
 
-        AbstractSingleActivityOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec,
-                new ConstantFileSplitProvider(new FileSplit[] {
-                        new FileSplit("asterix-005", createTempFile().getAbsolutePath()),
-                        new FileSplit("asterix-006", createTempFile().getAbsolutePath()) }), "\t");
+        ResultSetId rsId = new ResultSetId(1);
+        AbstractSingleActivityOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
+        spec.addResultSetId(rsId);
 
         return printer;
     }
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/OptimizedSortMergeTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/OptimizedSortMergeTest.java
index 1ee4400..ec9be32 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/OptimizedSortMergeTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/OptimizedSortMergeTest.java
@@ -24,6 +24,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
@@ -40,9 +41,10 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.misc.LimitOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.sort.OptimizedExternalSortOperatorDescriptor;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class OptimizedSortMergeTest extends AbstractIntegrationTest {
 
@@ -75,9 +77,11 @@
                         PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) }, ordersDesc);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID, NC2_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
@@ -128,9 +132,11 @@
         LimitOperatorDescriptor filter = new LimitOperatorDescriptor(spec, ordersDesc, outputLimit);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, filter, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/ScanPrintTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/ScanPrintTest.java
index 9355110..961f780 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/ScanPrintTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/ScanPrintTest.java
@@ -24,6 +24,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryHashFunctionFactory;
@@ -42,7 +43,8 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class ScanPrintTest extends AbstractIntegrationTest {
     @Test
@@ -63,10 +65,11 @@
                 desc);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, csvScanner, NC2_ID, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] {
-                new FileSplit(NC2_ID, createTempFile().getAbsolutePath()),
-                new FileSplit(NC1_ID, createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
+        spec.addResultSetId(rsId);
+
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         IConnectorDescriptor conn = new OneToOneConnectorDescriptor(spec);
@@ -98,9 +101,11 @@
                         UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE }, '|'), ordersDesc);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, ordScanner, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
+        spec.addResultSetId(rsId);
+
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
@@ -135,9 +140,11 @@
                         UTF8StringParserFactory.INSTANCE, UTF8StringParserFactory.INSTANCE }, '|'), ordersDesc);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, ordScanner, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
+        spec.addResultSetId(rsId);
+
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor conn1 = new MToNPartitioningConnectorDescriptor(spec,
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/SortMergeTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/SortMergeTest.java
index 2c3fddf..0da93f2 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/SortMergeTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/SortMergeTest.java
@@ -24,6 +24,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
@@ -40,9 +41,10 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.sort.InMemorySortOperatorDescriptor;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class SortMergeTest extends AbstractIntegrationTest {
     @Test
@@ -73,9 +75,11 @@
                 ordersDesc);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID, NC2_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
@@ -118,9 +122,11 @@
                         PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) }, ordersDesc);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID, NC2_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/SplitOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/SplitOperatorTest.java
index 2b32142..6040748 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/SplitOperatorTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/SplitOperatorTest.java
@@ -26,6 +26,7 @@
 import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
@@ -35,8 +36,9 @@
 import edu.uci.ics.hyracks.dataflow.std.file.DelimitedDataTupleParserFactory;
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
-import edu.uci.ics.hyracks.dataflow.std.file.LineFileWriteOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.misc.SplitOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class SplitOperatorTest extends AbstractIntegrationTest {
 
@@ -50,6 +52,8 @@
             Assert.assertEquals(lineA, lineB);
         }
         Assert.assertNull(fileB.readLine());
+        fileA.close();
+        fileB.close();
     }
 
     @Test
@@ -83,8 +87,11 @@
 
         IOperatorDescriptor outputOp[] = new IOperatorDescriptor[outputFile.length];
         for (int i = 0; i < outputArity; i++) {
-            outputOp[i] = new LineFileWriteOperatorDescriptor(spec, new FileSplit[] { new FileSplit(NC1_ID,
-                    outputFile[i].getAbsolutePath()) });
+            ResultSetId rsId = new ResultSetId(i);
+            spec.addResultSetId(rsId);
+
+            outputOp[i] = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                    ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
             PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, outputOp[i], locations);
         }
 
@@ -96,10 +103,10 @@
         for (int i = 0; i < outputArity; i++) {
             spec.addRoot(outputOp[i]);
         }
-        runTest(spec);
-
+        String[] expectedResultsFileNames = new String[outputArity];
         for (int i = 0; i < outputArity; i++) {
-            compareFiles(inputFileName, outputFile[i].getAbsolutePath());
+            expectedResultsFileNames[i] = inputFileName;
         }
+        runTestAndCompareResults(spec, expectedResultsFileNames);
     }
 }
\ No newline at end of file
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/TPCHCustomerOrderHashJoinTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/TPCHCustomerOrderHashJoinTest.java
index 622942b..b5eb850 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/TPCHCustomerOrderHashJoinTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/TPCHCustomerOrderHashJoinTest.java
@@ -14,9 +14,7 @@
  */
 package edu.uci.ics.hyracks.tests.integration;
 
-import java.io.DataOutput;
 import java.io.File;
-import java.io.IOException;
 
 import org.junit.Test;
 
@@ -25,11 +23,10 @@
 import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.INullWriter;
 import edu.uci.ics.hyracks.api.dataflow.value.INullWriterFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
@@ -47,12 +44,13 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.join.GraceHashJoinOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.join.HybridHashJoinOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.join.InMemoryHashJoinOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.misc.MaterializingOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.tests.util.NoopNullWriterFactory;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class TPCHCustomerOrderHashJoinTest extends AbstractIntegrationTest {
 
@@ -127,9 +125,11 @@
                 custOrderJoinDesc, 128);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordJoinConn = new OneToOneConnectorDescriptor(spec);
@@ -208,9 +208,11 @@
                 custOrderJoinDesc);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordJoinConn = new OneToOneConnectorDescriptor(spec);
@@ -289,9 +291,11 @@
                 custOrderJoinDesc);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordJoinConn = new OneToOneConnectorDescriptor(spec);
@@ -371,9 +375,11 @@
                 custOrderJoinDesc, true, nullWriterFactories, 128);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordJoinConn = new OneToOneConnectorDescriptor(spec);
@@ -457,9 +463,11 @@
                 custOrderJoinDesc, true, nullWriterFactories);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordJoinConn = new OneToOneConnectorDescriptor(spec);
@@ -543,9 +551,11 @@
                 custOrderJoinDesc, true, nullWriterFactories);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordJoinConn = new OneToOneConnectorDescriptor(spec);
@@ -622,9 +632,11 @@
                 custOrderJoinDesc, 128);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID, NC2_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordJoinConn = new MToNPartitioningConnectorDescriptor(spec,
@@ -711,9 +723,11 @@
                 custOrderJoinDesc);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID, NC2_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordJoinConn = new MToNPartitioningConnectorDescriptor(spec,
@@ -800,9 +814,11 @@
                 custOrderJoinDesc);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID, NC2_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordJoinConn = new MToNPartitioningConnectorDescriptor(spec,
@@ -885,9 +901,11 @@
                 custOrderJoinDesc, 128);
         PartitionConstraintHelper.addPartitionCountConstraint(spec, join, 2);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordJoinConn = new MToNPartitioningConnectorDescriptor(spec,
@@ -976,9 +994,11 @@
                 custOrderJoinDesc, 128);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID, NC2_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordPartConn = new MToNPartitioningConnectorDescriptor(spec,
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/TPCHCustomerOrderNestedLoopJoinTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/TPCHCustomerOrderNestedLoopJoinTest.java
index 9233e39..99f2d18 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/TPCHCustomerOrderNestedLoopJoinTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/TPCHCustomerOrderNestedLoopJoinTest.java
@@ -15,7 +15,9 @@
 package edu.uci.ics.hyracks.tests.integration;
 
 import java.io.File;
+
 import org.junit.Test;
+
 import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
 import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
@@ -28,6 +30,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ITuplePairComparator;
 import edu.uci.ics.hyracks.api.dataflow.value.ITuplePairComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
@@ -42,9 +45,10 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.join.NestedLoopJoinOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.tests.util.NoopNullWriterFactory;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class TPCHCustomerOrderNestedLoopJoinTest extends AbstractIntegrationTest {
     private static class JoinComparatorFactory implements ITuplePairComparatorFactory {
@@ -169,9 +173,11 @@
                 null);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordJoinConn = new OneToOneConnectorDescriptor(spec);
@@ -244,9 +250,11 @@
                 null);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID, NC2_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordJoinConn = new OneToOneConnectorDescriptor(spec);
@@ -319,9 +327,11 @@
                 null);
         PartitionConstraintHelper.addPartitionCountConstraint(spec, join, 2);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordJoinConn = new OneToOneConnectorDescriptor(spec);
@@ -399,9 +409,11 @@
                 nullWriterFactories);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, join, NC1_ID, NC2_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor ordJoinConn = new OneToOneConnectorDescriptor(spec);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/UnionTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/UnionTest.java
index 37b55b8..5b323e6 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/UnionTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/integration/UnionTest.java
@@ -22,6 +22,7 @@
 import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
@@ -33,8 +34,9 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.union.UnionAllOperatorDescriptor;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class UnionTest extends AbstractIntegrationTest {
     @Test
@@ -65,10 +67,11 @@
         UnionAllOperatorDescriptor unionAll = new UnionAllOperatorDescriptor(spec, 2, desc);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, unionAll, NC2_ID, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] {
-                new FileSplit(NC2_ID, createTempFile().getAbsolutePath()),
-                new FileSplit(NC1_ID, createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, false,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC2_ID, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), csvScanner01, 0, unionAll, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/BinaryTokenizerOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/BinaryTokenizerOperatorTest.java
index 836e72e..600b54b 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/BinaryTokenizerOperatorTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/BinaryTokenizerOperatorTest.java
@@ -8,6 +8,7 @@
 import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
@@ -21,13 +22,14 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.invertedindex.dataflow.BinaryTokenizerOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.DelimitedUTF8StringBinaryTokenizerFactory;
 import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizerFactory;
 import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.ITokenFactory;
 import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.UTF8WordTokenFactory;
 import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class BinaryTokenizerOperatorTest extends AbstractIntegrationTest {
 
@@ -58,9 +60,11 @@
                 tokenizerRecDesc, tokenizerFactory, tokenFields, keyFields);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, binaryTokenizer, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), dblpTitleScanner, 0, binaryTokenizer, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/InvertedIndexOperatorsTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/InvertedIndexOperatorsTest.java
index 2206a26..b5a4df8 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/InvertedIndexOperatorsTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/InvertedIndexOperatorsTest.java
@@ -8,6 +8,7 @@
 import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
@@ -21,13 +22,14 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.invertedindex.dataflow.BinaryTokenizerOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.DelimitedUTF8StringBinaryTokenizerFactory;
 import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.IBinaryTokenizerFactory;
 import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.ITokenFactory;
 import edu.uci.ics.hyracks.storage.am.invertedindex.tokenizers.UTF8WordTokenFactory;
 import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class InvertedIndexOperatorsTest extends AbstractIntegrationTest {
 
@@ -58,9 +60,11 @@
                 tokenizerRecDesc, tokenizerFactory, tokenFields, projFields);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, binaryTokenizer, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), dblpTitleScanner, 0, binaryTokenizer, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/WordInvertedIndexTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/WordInvertedIndexTest.java
index d8fd48e..d1071a3 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/WordInvertedIndexTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/invertedindex/WordInvertedIndexTest.java
@@ -30,6 +30,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
@@ -48,8 +49,8 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
@@ -74,6 +75,7 @@
 import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
 import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
 import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class WordInvertedIndexTest extends AbstractIntegrationTest {
     static {
@@ -87,9 +89,12 @@
     private final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("ddMMyy-hhmmssSS");
     private final static String sep = System.getProperty("file.separator");
     private final static String dateString = simpleDateFormat.format(new Date());
-    private final static String primaryFileName = System.getProperty("java.io.tmpdir") + sep + "primaryBtree" + dateString;
-    private final static String btreeFileName = System.getProperty("java.io.tmpdir") + sep + "invIndexBtree" + dateString;
-    private final static String invListsFileName = System.getProperty("java.io.tmpdir") + sep + "invIndexLists" + dateString;
+    private final static String primaryFileName = System.getProperty("java.io.tmpdir") + sep + "primaryBtree"
+            + dateString;
+    private final static String btreeFileName = System.getProperty("java.io.tmpdir") + sep + "invIndexBtree"
+            + dateString;
+    private final static String invListsFileName = System.getProperty("java.io.tmpdir") + sep + "invIndexLists"
+            + dateString;
 
     private IFileSplitProvider primaryFileSplitProvider = new ConstantFileSplitProvider(
             new FileSplit[] { new FileSplit(NC1_ID, new FileReference(new File(primaryFileName))) });
@@ -155,7 +160,7 @@
         spec.addRoot(primaryCreateOp);
         runTest(spec);
     }
-    
+
     @Test
     public void testConjunctiveSearcher() throws Exception {
         IInvertedIndexSearchModifierFactory conjunctiveSearchModifierFactory = new ConjunctiveSearchModifierFactory();
@@ -180,8 +185,9 @@
     private IOperatorDescriptor createPrimaryBulkLoadOp(JobSpecification spec) {
         int[] fieldPermutation = { 0, 1 };
         TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
-                storageManager, indexRegistryProvider, primaryFileSplitProvider, primaryTypeTraits, primaryComparatorFactories, fieldPermutation, 0.7f,
-                btreeDataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, indexRegistryProvider, primaryFileSplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, fieldPermutation, 0.7f, btreeDataflowHelperFactory,
+                NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
         return primaryBtreeBulkLoad;
     }
@@ -206,8 +212,9 @@
         int[] lowKeyFields = null; // - infinity
         int[] highKeyFields = null; // + infinity
         BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
-                storageManager, indexRegistryProvider, primaryFileSplitProvider, primaryTypeTraits, primaryComparatorFactories, lowKeyFields,
-                highKeyFields, true, true, btreeDataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, indexRegistryProvider, primaryFileSplitProvider, primaryTypeTraits,
+                primaryComparatorFactories, lowKeyFields, highKeyFields, true, true, btreeDataflowHelperFactory, false,
+                NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
         return primaryBtreeSearchOp;
     }
@@ -227,9 +234,12 @@
         JobSpecification spec = new JobSpecification();
         IOperatorDescriptor keyProviderOp = createScanKeyProviderOp(spec);
         IOperatorDescriptor primaryScanOp = createPrimaryScanOp(spec);
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryScanOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), primaryScanOp, 0, printer, 0);
         spec.addRoot(printer);
@@ -265,15 +275,14 @@
     public void createInvertedIndex() throws Exception {
         JobSpecification spec = new JobSpecification();
         InvertedIndexCreateOperatorDescriptor invIndexCreateOp = new InvertedIndexCreateOperatorDescriptor(spec,
-                storageManager, btreeFileSplitProvider, invListsFileSplitProvider,
-                indexRegistryProvider, tokenTypeTraits, tokenComparatorFactories, invListsTypeTraits,
-                invListsComparatorFactories, tokenizerFactory, btreeDataflowHelperFactory,
-                NoOpOperationCallbackProvider.INSTANCE);
+                storageManager, btreeFileSplitProvider, invListsFileSplitProvider, indexRegistryProvider,
+                tokenTypeTraits, tokenComparatorFactories, invListsTypeTraits, invListsComparatorFactories,
+                tokenizerFactory, btreeDataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, invIndexCreateOp, NC1_ID);
         spec.addRoot(invIndexCreateOp);
         runTest(spec);
     }
-    
+
     public void loadInvertedIndex() throws Exception {
         JobSpecification spec = new JobSpecification();
         IOperatorDescriptor keyProviderOp = createScanKeyProviderOp(spec);
@@ -325,20 +334,23 @@
         JobSpecification spec = new JobSpecification();
         IOperatorDescriptor queryProviderOp = createQueryProviderOp(spec, queryString);
         IOperatorDescriptor invIndexSearchOp = createInvertedIndexSearchOp(spec, searchModifierFactory);
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         spec.connect(new OneToOneConnectorDescriptor(spec), queryProviderOp, 0, invIndexSearchOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), invIndexSearchOp, 0, printer, 0);
         spec.addRoot(printer);
         runTest(spec);
     }
-    
+
     @AfterClass
     public static void cleanup() throws Exception {
-    	File primary = new File(primaryFileName);
-    	File btree = new File(btreeFileName);
-    	File invLists = new File(invListsFileName);
+        File primary = new File(primaryFileName);
+        File btree = new File(btreeFileName);
+        File invLists = new File(invListsFileName);
         primary.deleteOnExit();
         btree.deleteOnExit();
         invLists.deleteOnExit();
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreePrimaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreePrimaryIndexSearchOperatorTest.java
index 6625148..92b6e14 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreePrimaryIndexSearchOperatorTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreePrimaryIndexSearchOperatorTest.java
@@ -30,6 +30,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
@@ -47,8 +48,8 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
@@ -64,6 +65,7 @@
 import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
 import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
 import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class RTreePrimaryIndexSearchOperatorTest extends AbstractIntegrationTest {
     static {
@@ -190,9 +192,11 @@
                 dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryRTreeSearchOp, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryRTreeSearchOp, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreePrimaryIndexStatsOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreePrimaryIndexStatsOperatorTest.java
index ef2950e..2a00394 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreePrimaryIndexStatsOperatorTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreePrimaryIndexStatsOperatorTest.java
@@ -29,6 +29,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
@@ -45,6 +46,7 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
@@ -64,6 +66,7 @@
 import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
 import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
 import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class RTreePrimaryIndexStatsOperatorTest extends AbstractIntegrationTest {
     static {
@@ -175,9 +178,11 @@
                 primaryTypeTraits, primaryComparatorFactories, dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryStatsOp, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), primaryStatsOp, 0, printer, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreeSecondaryIndexSearchOperatorTest.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreeSecondaryIndexSearchOperatorTest.java
index 030afcf..1d86037 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreeSecondaryIndexSearchOperatorTest.java
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/rtree/RTreeSecondaryIndexSearchOperatorTest.java
@@ -30,6 +30,7 @@
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.dataset.ResultSetId;
 import edu.uci.ics.hyracks.api.io.FileReference;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
@@ -47,8 +48,8 @@
 import edu.uci.ics.hyracks.dataflow.std.file.FileScanOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
-import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
+import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.sort.ExternalSortOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
@@ -67,6 +68,7 @@
 import edu.uci.ics.hyracks.test.support.TestStorageManagerComponentHolder;
 import edu.uci.ics.hyracks.test.support.TestStorageManagerInterface;
 import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
+import edu.uci.ics.hyracks.tests.util.ResultSerializerFactoryProvider;
 
 public class RTreeSecondaryIndexSearchOperatorTest extends AbstractIntegrationTest {
     static {
@@ -297,9 +299,11 @@
                 secondaryTypeTraits, secondaryComparatorFactories, keyFields, dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryRTreeSearchOp, NC1_ID);
 
-        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
-                createTempFile().getAbsolutePath()) });
-        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
+        ResultSetId rsId = new ResultSetId(1);
+        spec.addResultSetId(rsId);
+
+        IOperatorDescriptor printer = new ResultWriterOperatorDescriptor(spec, rsId, true,
+                ResultSerializerFactoryProvider.INSTANCE.getResultSerializerFactoryProvider());
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, secondaryRTreeSearchOp, 0);
diff --git a/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/util/ResultSerializerFactoryProvider.java b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/util/ResultSerializerFactoryProvider.java
new file mode 100644
index 0000000..19c4475
--- /dev/null
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/util/ResultSerializerFactoryProvider.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.tests.util;
+
+import java.io.DataInputStream;
+import java.io.PrintStream;
+import java.io.Serializable;
+
+import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
+import edu.uci.ics.hyracks.api.dataflow.value.IResultSerializer;
+import edu.uci.ics.hyracks.api.dataflow.value.IResultSerializerFactory;
+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.util.ByteBufferInputStream;
+
+public class ResultSerializerFactoryProvider implements Serializable {
+    private static final long serialVersionUID = 1L;
+
+    public static final ResultSerializerFactoryProvider INSTANCE = new ResultSerializerFactoryProvider();
+
+    private ResultSerializerFactoryProvider() {
+    }
+
+    public IResultSerializerFactory getResultSerializerFactoryProvider() {
+        return new IResultSerializerFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public IResultSerializer createResultSerializer(final RecordDescriptor recordDesc,
+                    final PrintStream printStream) {
+                return new IResultSerializer() {
+                    private static final long serialVersionUID = 1L;
+
+                    ByteBufferInputStream bbis = new ByteBufferInputStream();
+                    DataInputStream di = new DataInputStream(bbis);
+
+                    @Override
+                    public void init() throws HyracksDataException {
+
+                    }
+
+                    @Override
+                    public boolean appendTuple(IFrameTupleAccessor tAccess, int tIdx) throws HyracksDataException {
+                        int start = tAccess.getTupleStartOffset(tIdx) + tAccess.getFieldSlotsLength();
+
+                        bbis.setByteBuffer(tAccess.getBuffer(), start);
+
+                        Object[] record = new Object[recordDesc.getFieldCount()];
+                        for (int i = 0; i < record.length; ++i) {
+                            Object instance = recordDesc.getFields()[i].deserialize(di);
+                            if (i == 0) {
+                                printStream.print(String.valueOf(instance));
+                            } else {
+                                printStream.print(", " + String.valueOf(instance));
+                            }
+                        }
+                        printStream.println();
+                        return true;
+                    }
+                };
+            }
+        };
+    }
+}
diff --git a/hyracks/hyracks-examples/pom.xml b/hyracks/hyracks-examples/pom.xml
index 551e2be..541220a 100644
--- a/hyracks/hyracks-examples/pom.xml
+++ b/hyracks/hyracks-examples/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-examples/text-example/pom.xml b/hyracks/hyracks-examples/text-example/pom.xml
index 0476bb3..a183835 100644
--- a/hyracks/hyracks-examples/text-example/pom.xml
+++ b/hyracks/hyracks-examples/text-example/pom.xml
@@ -8,7 +8,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-examples</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-examples/text-example/textapp/pom.xml b/hyracks/hyracks-examples/text-example/textapp/pom.xml
index 945df0b..5927e83 100644
--- a/hyracks/hyracks-examples/text-example/textapp/pom.xml
+++ b/hyracks/hyracks-examples/text-example/textapp/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>text-example</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -77,7 +77,7 @@
       <plugin>
       	<groupId>edu.uci.ics.hyracks</groupId>
       	<artifactId>hyracks-virtualcluster-maven-plugin</artifactId>
-      	<version>0.2.3-SNAPSHOT</version>
+      	<version>0.2.4-SNAPSHOT</version>
         <configuration>
           <hyracksServerHome>${basedir}/../../../hyracks-server/target/hyracks-server-${project.version}-binary-assembly</hyracksServerHome>
           <hyracksCLIHome>${basedir}/../../../hyracks-cli/target/hyracks-cli-${project.version}-binary-assembly</hyracksCLIHome>
@@ -166,13 +166,13 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks.examples.text</groupId>
   		<artifactId>texthelper</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks.examples.text</groupId>
   		<artifactId>textclient</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>test</scope>
   	</dependency>
diff --git a/hyracks/hyracks-examples/text-example/textclient/pom.xml b/hyracks/hyracks-examples/text-example/textclient/pom.xml
index 4aace73..633f480 100644
--- a/hyracks/hyracks-examples/text-example/textclient/pom.xml
+++ b/hyracks/hyracks-examples/text-example/textclient/pom.xml
@@ -7,20 +7,20 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>text-example</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks.examples.text</groupId>
   		<artifactId>texthelper</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-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 bcb280c..5cf5da3 100644
--- a/hyracks/hyracks-examples/text-example/texthelper/pom.xml
+++ b/hyracks/hyracks-examples/text-example/texthelper/pom.xml
@@ -7,26 +7,26 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>text-example</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-data-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   	</dependency>
   </dependencies>
   <build>
diff --git a/hyracks/hyracks-examples/tpch-example/pom.xml b/hyracks/hyracks-examples/tpch-example/pom.xml
index 9951792..a36efc9 100644
--- a/hyracks/hyracks-examples/tpch-example/pom.xml
+++ b/hyracks/hyracks-examples/tpch-example/pom.xml
@@ -8,7 +8,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-examples</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-examples/tpch-example/tpchapp/pom.xml b/hyracks/hyracks-examples/tpch-example/tpchapp/pom.xml
index 76eb257..89689c2 100644
--- a/hyracks/hyracks-examples/tpch-example/tpchapp/pom.xml
+++ b/hyracks/hyracks-examples/tpch-example/tpchapp/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>tpch-example</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -79,13 +79,13 @@
     <dependency>
         <groupId>edu.uci.ics.hyracks</groupId>
         <artifactId>hyracks-dataflow-std</artifactId>
-        <version>0.2.3-SNAPSHOT</version>
+        <version>0.2.4-SNAPSHOT</version>
         <scope>compile</scope>
     </dependency>
     <dependency>
     	<groupId>edu.uci.ics.hyracks</groupId>
     	<artifactId>hyracks-data-std</artifactId>
-    	<version>0.2.3-SNAPSHOT</version>
+    	<version>0.2.4-SNAPSHOT</version>
     </dependency>
   </dependencies>
 </project>
diff --git a/hyracks/hyracks-examples/tpch-example/tpchclient/pom.xml b/hyracks/hyracks-examples/tpch-example/tpchclient/pom.xml
index 4e0d9f0..d6f1d17 100644
--- a/hyracks/hyracks-examples/tpch-example/tpchclient/pom.xml
+++ b/hyracks/hyracks-examples/tpch-example/tpchclient/pom.xml
@@ -6,20 +6,20 @@
   <parent>
     <groupId>edu.uci.ics.hyracks.examples</groupId>
     <artifactId>tpch-example</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <dependencies>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-data-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   	</dependency>
   </dependencies>
   <build>
diff --git a/hyracks/hyracks-hadoop-compat/pom.xml b/hyracks/hyracks-hadoop-compat/pom.xml
index 87aaaa7..09d3127 100644
--- a/hyracks/hyracks-hadoop-compat/pom.xml
+++ b/hyracks/hyracks-hadoop-compat/pom.xml
@@ -2,13 +2,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-hadoop-compat</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-hadoop-compat</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -82,7 +82,7 @@
     <dependency>
     	<groupId>edu.uci.ics.hyracks</groupId>
     	<artifactId>hyracks-dataflow-hadoop</artifactId>
-    	<version>0.2.3-SNAPSHOT</version>
+    	<version>0.2.4-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 9092655..c708b0d 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-0.20.2/pom.xml
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-0.20.2/pom.xml
@@ -1,14 +1,12 @@
 <?xml version="1.0"?>
-<project
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
-	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>hyracks-hdfs-0.20.2</artifactId>
 	<name>hyracks-hdfs-0.20.2</name>
 	<parent>
 		<artifactId>hyracks-hdfs</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -100,7 +98,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-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 8b7ecf0..9f96ac1 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-0.23.1/pom.xml
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-0.23.1/pom.xml
@@ -1,14 +1,12 @@
 <?xml version="1.0"?>
-<project
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
-	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>hyracks-hdfs-0.23.1</artifactId>
 	<name>hyracks-hdfs-0.23.1</name>
 	<parent>
 		<artifactId>hyracks-hdfs</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 	<build>
 		<plugins>
@@ -204,7 +202,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-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 5515d18..b693c0a 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/pom.xml
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/pom.xml
@@ -1,14 +1,12 @@
 <?xml version="1.0"?>
-<project
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
-	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>hyracks-hdfs-core</artifactId>
 	<name>hyracks-hdfs-core</name>
 	<parent>
 		<artifactId>hyracks-hdfs</artifactId>
 		<groupId>edu.uci.ics.hyracks</groupId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -79,7 +77,7 @@
 				<dependency>
 					<groupId>edu.uci.ics.hyracks</groupId>
 					<artifactId>hyracks-hdfs-0.20.2</artifactId>
-					<version>0.2.3-SNAPSHOT</version>
+					<version>${project.version}</version>
 					<type>jar</type>
 					<scope>compile</scope>
 				</dependency>
@@ -98,7 +96,7 @@
 				<dependency>
 					<groupId>edu.uci.ics.hyracks</groupId>
 					<artifactId>hyracks-hdfs-0.20.2</artifactId>
-					<version>0.2.3-SNAPSHOT</version>
+					<version>${project.version}</version>
 					<type>jar</type>
 					<scope>compile</scope>
 				</dependency>
@@ -117,7 +115,7 @@
 				<dependency>
 					<groupId>edu.uci.ics.hyracks</groupId>
 					<artifactId>hyracks-hdfs-0.23.1</artifactId>
-					<version>0.2.3-SNAPSHOT</version>
+					<version>${project.version}</version>
 					<type>jar</type>
 					<scope>compile</scope>
 				</dependency>
@@ -136,7 +134,7 @@
 				<dependency>
 					<groupId>edu.uci.ics.hyracks</groupId>
 					<artifactId>hyracks-hdfs-0.23.1</artifactId>
-					<version>0.2.3-SNAPSHOT</version>
+					<version>${project.version}</version>
 					<type>jar</type>
 					<scope>compile</scope>
 				</dependency>
@@ -155,7 +153,7 @@
 				<dependency>
 					<groupId>edu.uci.ics.hyracks</groupId>
 					<artifactId>hyracks-hdfs-0.23.1</artifactId>
-					<version>0.2.3-SNAPSHOT</version>
+					<version>${project.version}</version>
 					<type>jar</type>
 					<scope>compile</scope>
 				</dependency>
@@ -174,7 +172,7 @@
 				<dependency>
 					<groupId>edu.uci.ics.hyracks</groupId>
 					<artifactId>hyracks-hdfs-0.23.1</artifactId>
-					<version>0.2.3-SNAPSHOT</version>
+					<version>${project.version}</version>
 					<type>jar</type>
 					<scope>compile</scope>
 				</dependency>
@@ -192,31 +190,31 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/api/INcCollection.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/api/INcCollection.java
new file mode 100644
index 0000000..c51c1dd
--- /dev/null
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/api/INcCollection.java
@@ -0,0 +1,11 @@
+package edu.uci.ics.hyracks.hdfs.api;
+
+import org.apache.hadoop.mapred.InputSplit;
+
+@SuppressWarnings("deprecation")
+public interface INcCollection {
+
+    public String findNearestAvailableSlot(InputSplit split);
+
+    public int numAvailableSlots();
+}
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/api/INcCollectionBuilder.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/api/INcCollectionBuilder.java
new file mode 100644
index 0000000..ef3ff23
--- /dev/null
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/api/INcCollectionBuilder.java
@@ -0,0 +1,18 @@
+package edu.uci.ics.hyracks.hdfs.api;
+
+import java.util.List;
+import java.util.Map;
+
+import edu.uci.ics.hyracks.api.client.NodeControllerInfo;
+
+/**
+ * NC collections
+ * 
+ * @author yingyib
+ */
+public interface INcCollectionBuilder {
+
+    public INcCollection build(Map<String, NodeControllerInfo> ncNameToNcInfos,
+            Map<String, List<String>> ipToNcMapping, Map<String, Integer> ncNameToIndex, String[] NCs, int[] workloads,
+            int slotLimit);
+}
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/dataflow/InputSplitsFactory.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/dataflow/InputSplitsFactory.java
index 9cc9ebc..147e872 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/dataflow/InputSplitsFactory.java
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/dataflow/InputSplitsFactory.java
@@ -23,6 +23,7 @@
 import java.io.Serializable;
 import java.lang.reflect.Constructor;
 
+import org.apache.hadoop.mapred.FileSplit;
 import org.apache.hadoop.mapred.InputSplit;
 
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
@@ -38,6 +39,8 @@
         splitBytes = splitsToBytes(splits);
         if (splits.length > 0) {
             splitClassName = splits[0].getClass().getName();
+        } else {
+            splitClassName = FileSplit.class.getName();
         }
     }
 
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/scheduler/IPProximityNcCollectionBuilder.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/scheduler/IPProximityNcCollectionBuilder.java
new file mode 100644
index 0000000..320b48b
--- /dev/null
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/scheduler/IPProximityNcCollectionBuilder.java
@@ -0,0 +1,121 @@
+package edu.uci.ics.hyracks.hdfs.scheduler;
+
+import java.net.InetAddress;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.TreeMap;
+
+import org.apache.hadoop.io.BytesWritable;
+import org.apache.hadoop.io.IntWritable;
+import org.apache.hadoop.mapred.InputSplit;
+
+import edu.uci.ics.hyracks.api.client.NodeControllerInfo;
+import edu.uci.ics.hyracks.hdfs.api.INcCollection;
+import edu.uci.ics.hyracks.hdfs.api.INcCollectionBuilder;
+
+@SuppressWarnings("deprecation")
+public class IPProximityNcCollectionBuilder implements INcCollectionBuilder {
+
+    @Override
+    public INcCollection build(Map<String, NodeControllerInfo> ncNameToNcInfos,
+            final Map<String, List<String>> ipToNcMapping, final Map<String, Integer> ncNameToIndex, String[] NCs,
+            final int[] workloads, final int slotLimit) {
+        final TreeMap<BytesWritable, IntWritable> availableIpsToSlots = new TreeMap<BytesWritable, IntWritable>();
+        for (int i = 0; i < workloads.length; i++) {
+            if (workloads[i] < slotLimit) {
+                BytesWritable ip = new BytesWritable(ncNameToNcInfos.get(NCs[i]).getNetworkAddress().getIpAddress());
+                IntWritable availableSlot = availableIpsToSlots.get(ip);
+                if (availableSlot == null) {
+                    availableSlot = new IntWritable(slotLimit - workloads[i]);
+                    availableIpsToSlots.put(ip, availableSlot);
+                } else {
+                    availableSlot.set(slotLimit - workloads[i] + availableSlot.get());
+                }
+            }
+        }
+        return new INcCollection() {
+
+            @Override
+            public String findNearestAvailableSlot(InputSplit split) {
+                try {
+                    String[] locs = split.getLocations();
+                    int minDistance = Integer.MAX_VALUE;
+                    BytesWritable currentCandidateIp = null;
+                    if (locs == null || locs.length > 0) {
+                        for (int j = 0; j < locs.length; j++) {
+                            /**
+                             * get all the IP addresses from the name
+                             */
+                            InetAddress[] allIps = InetAddress.getAllByName(locs[j]);
+                            for (InetAddress ip : allIps) {
+                                BytesWritable splitIp = new BytesWritable(ip.getAddress());
+                                /**
+                                 * if the node controller exists
+                                 */
+                                BytesWritable candidateNcIp = availableIpsToSlots.floorKey(splitIp);
+                                if (candidateNcIp == null) {
+                                    candidateNcIp = availableIpsToSlots.ceilingKey(splitIp);
+                                }
+                                if (candidateNcIp != null) {
+                                    if (availableIpsToSlots.get(candidateNcIp).get() > 0) {
+                                        byte[] candidateIP = candidateNcIp.getBytes();
+                                        byte[] splitIP = splitIp.getBytes();
+                                        int candidateInt = candidateIP[0] << 24 | (candidateIP[1] & 0xFF) << 16
+                                                | (candidateIP[2] & 0xFF) << 8 | (candidateIP[3] & 0xFF);
+                                        int splitInt = splitIP[0] << 24 | (splitIP[1] & 0xFF) << 16
+                                                | (splitIP[2] & 0xFF) << 8 | (splitIP[3] & 0xFF);
+                                        int distance = Math.abs(candidateInt - splitInt);
+                                        if (minDistance > distance) {
+                                            minDistance = distance;
+                                            currentCandidateIp = candidateNcIp;
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    } else {
+                        for (Entry<BytesWritable, IntWritable> entry : availableIpsToSlots.entrySet()) {
+                            if (entry.getValue().get() > 0) {
+                                currentCandidateIp = entry.getKey();
+                                break;
+                            }
+                        }
+                    }
+
+                    if (currentCandidateIp != null) {
+                        /**
+                         * Update the entry of the selected IP
+                         */
+                        IntWritable availableSlot = availableIpsToSlots.get(currentCandidateIp);
+                        availableSlot.set(availableSlot.get() - 1);
+                        if (availableSlot.get() == 0) {
+                            availableIpsToSlots.remove(currentCandidateIp);
+                        }
+                        /**
+                         * Update the entry of the selected NC
+                         */
+                        List<String> dataLocations = ipToNcMapping.get(InetAddress.getByAddress(
+                                currentCandidateIp.getBytes()).getHostAddress());
+                        for (String nc : dataLocations) {
+                            int ncIndex = ncNameToIndex.get(nc);
+                            if (workloads[ncIndex] < slotLimit) {
+                                return nc;
+                            }
+                        }
+                    }
+                    /** not scheduled */
+                    return null;
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+
+            @Override
+            public int numAvailableSlots() {
+                return availableIpsToSlots.size();
+            }
+
+        };
+    }
+}
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/scheduler/RackAwareNcCollectionBuilder.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/scheduler/RackAwareNcCollectionBuilder.java
new file mode 100644
index 0000000..fa5e7ae
--- /dev/null
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/scheduler/RackAwareNcCollectionBuilder.java
@@ -0,0 +1,211 @@
+package edu.uci.ics.hyracks.hdfs.scheduler;
+
+import java.net.InetAddress;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.TreeMap;
+import java.util.logging.Logger;
+
+import org.apache.hadoop.io.IntWritable;
+import org.apache.hadoop.mapred.InputSplit;
+
+import edu.uci.ics.hyracks.api.client.NodeControllerInfo;
+import edu.uci.ics.hyracks.api.topology.ClusterTopology;
+import edu.uci.ics.hyracks.hdfs.api.INcCollection;
+import edu.uci.ics.hyracks.hdfs.api.INcCollectionBuilder;
+
+@SuppressWarnings("deprecation")
+public class RackAwareNcCollectionBuilder implements INcCollectionBuilder {
+    private static final Logger LOGGER = Logger.getLogger(RackAwareNcCollectionBuilder.class.getName());
+    private ClusterTopology topology;
+
+    public RackAwareNcCollectionBuilder(ClusterTopology topology) {
+        this.topology = topology;
+    }
+
+    @Override
+    public INcCollection build(Map<String, NodeControllerInfo> ncNameToNcInfos,
+            final Map<String, List<String>> ipToNcMapping, final Map<String, Integer> ncNameToIndex, String[] NCs,
+            final int[] workloads, final int slotLimit) {
+        try {
+            final Map<List<Integer>, List<String>> pathToNCs = new HashMap<List<Integer>, List<String>>();
+            for (int i = 0; i < NCs.length; i++) {
+                List<Integer> path = new ArrayList<Integer>();
+                String ipAddress = InetAddress.getByAddress(
+                        ncNameToNcInfos.get(NCs[i]).getNetworkAddress().getIpAddress()).getHostAddress();
+                topology.lookupNetworkTerminal(ipAddress, path);
+                if (path.size() <= 0) {
+                    // if the hyracks nc is not in the defined cluster
+                    path.add(Integer.MIN_VALUE);
+                    LOGGER.info(NCs[i] + "'s IP address is not in the cluster toplogy file!");
+                }
+                List<String> ncs = pathToNCs.get(path);
+                if (ncs == null) {
+                    ncs = new ArrayList<String>();
+                    pathToNCs.put(path, ncs);
+                }
+                ncs.add(NCs[i]);
+            }
+
+            final TreeMap<List<Integer>, IntWritable> availableIpsToSlots = new TreeMap<List<Integer>, IntWritable>(
+                    new Comparator<List<Integer>>() {
+
+                        @Override
+                        public int compare(List<Integer> l1, List<Integer> l2) {
+                            int commonLength = Math.min(l1.size(), l2.size());
+                            for (int i = 0; i < commonLength; i++) {
+                                Integer value1 = l1.get(i);
+                                Integer value2 = l2.get(i);
+                                int cmp = value1 > value2 ? 1 : (value1 < value2 ? -1 : 0);
+                                if (cmp != 0) {
+                                    return cmp;
+                                }
+                            }
+                            return l1.size() > l2.size() ? 1 : (l1.size() < l2.size() ? -1 : 0);
+                        }
+
+                    });
+            for (int i = 0; i < workloads.length; i++) {
+                if (workloads[i] < slotLimit) {
+                    List<Integer> path = new ArrayList<Integer>();
+                    String ipAddress = InetAddress.getByAddress(
+                            ncNameToNcInfos.get(NCs[i]).getNetworkAddress().getIpAddress()).getHostAddress();
+                    topology.lookupNetworkTerminal(ipAddress, path);
+                    if (path.size() <= 0) {
+                        // if the hyracks nc is not in the defined cluster
+                        path.add(Integer.MIN_VALUE);
+                    }
+                    IntWritable availableSlot = availableIpsToSlots.get(path);
+                    if (availableSlot == null) {
+                        availableSlot = new IntWritable(slotLimit - workloads[i]);
+                        availableIpsToSlots.put(path, availableSlot);
+                    } else {
+                        availableSlot.set(slotLimit - workloads[i] + availableSlot.get());
+                    }
+                }
+            }
+            return new INcCollection() {
+
+                @Override
+                public String findNearestAvailableSlot(InputSplit split) {
+                    try {
+                        String[] locs = split.getLocations();
+                        int minDistance = Integer.MAX_VALUE;
+                        List<Integer> currentCandidatePath = null;
+                        if (locs == null || locs.length > 0) {
+                            for (int j = 0; j < locs.length; j++) {
+                                /**
+                                 * get all the IP addresses from the name
+                                 */
+                                InetAddress[] allIps = InetAddress.getAllByName(locs[j]);
+                                boolean inTopology = false;
+                                for (InetAddress ip : allIps) {
+                                    List<Integer> splitPath = new ArrayList<Integer>();
+                                    boolean inCluster = topology.lookupNetworkTerminal(ip.getHostAddress(), splitPath);
+                                    if (!inCluster) {
+                                        continue;
+                                    }
+                                    inTopology = true;
+                                    /**
+                                     * if the node controller exists
+                                     */
+                                    List<Integer> candidatePath = availableIpsToSlots.floorKey(splitPath);
+                                    if (candidatePath == null) {
+                                        candidatePath = availableIpsToSlots.ceilingKey(splitPath);
+                                    }
+                                    if (candidatePath != null) {
+                                        if (availableIpsToSlots.get(candidatePath).get() > 0) {
+                                            int distance = distance(splitPath, candidatePath);
+                                            if (minDistance > distance) {
+                                                minDistance = distance;
+                                                currentCandidatePath = candidatePath;
+                                            }
+                                        }
+
+                                    }
+                                }
+
+                                if (!inTopology) {
+                                    LOGGER.info(locs[j] + "'s IP address is not in the cluster toplogy file!");
+                                    /**
+                                     * if the machine is not in the toplogy file
+                                     */
+                                    List<Integer> candidatePath = null;
+                                    for (Entry<List<Integer>, IntWritable> entry : availableIpsToSlots.entrySet()) {
+                                        if (entry.getValue().get() > 0) {
+                                            candidatePath = entry.getKey();
+                                            break;
+                                        }
+                                    }
+                                    /** the split path is empty */
+                                    if (candidatePath != null) {
+                                        if (availableIpsToSlots.get(candidatePath).get() > 0) {
+                                            currentCandidatePath = candidatePath;
+                                        }
+                                    }
+                                }
+                            }
+                        } else {
+                            for (Entry<List<Integer>, IntWritable> entry : availableIpsToSlots.entrySet()) {
+                                if (entry.getValue().get() > 0) {
+                                    currentCandidatePath = entry.getKey();
+                                    break;
+                                }
+                            }
+                        }
+
+                        if (currentCandidatePath != null && currentCandidatePath.size() > 0) {
+                            /**
+                             * Update the entry of the selected IP
+                             */
+                            IntWritable availableSlot = availableIpsToSlots.get(currentCandidatePath);
+                            availableSlot.set(availableSlot.get() - 1);
+                            if (availableSlot.get() == 0) {
+                                availableIpsToSlots.remove(currentCandidatePath);
+                            }
+                            /**
+                             * Update the entry of the selected NC
+                             */
+                            List<String> candidateNcs = pathToNCs.get(currentCandidatePath);
+                            for (String candidate : candidateNcs) {
+                                int ncIndex = ncNameToIndex.get(candidate);
+                                if (workloads[ncIndex] < slotLimit) {
+                                    return candidate;
+                                }
+                            }
+                        }
+                        /** not scheduled */
+                        return null;
+                    } catch (Exception e) {
+                        throw new IllegalStateException(e);
+                    }
+                }
+
+                @Override
+                public int numAvailableSlots() {
+                    return availableIpsToSlots.size();
+                }
+
+                private int distance(List<Integer> splitPath, List<Integer> candidatePath) {
+                    int commonLength = Math.min(splitPath.size(), candidatePath.size());
+                    int distance = 0;
+                    for (int i = 0; i < commonLength; i++) {
+                        distance = distance * 100 + Math.abs(splitPath.get(i) - candidatePath.get(i));
+                    }
+                    List<Integer> restElements = splitPath.size() > candidatePath.size() ? splitPath : candidatePath;
+                    for (int i = commonLength; i < restElements.size(); i++) {
+                        distance = distance * 100 + Math.abs(restElements.get(i));
+                    }
+                    return distance;
+                }
+            };
+        } catch (Exception e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+}
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/scheduler/Scheduler.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/scheduler/Scheduler.java
index 3f287cf..3f7997b 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/scheduler/Scheduler.java
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/scheduler/Scheduler.java
@@ -20,11 +20,15 @@
 import java.net.UnknownHostException;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.PriorityQueue;
 import java.util.Random;
+import java.util.logging.Logger;
 
+import org.apache.hadoop.io.IntWritable;
 import org.apache.hadoop.mapred.InputSplit;
 
 import edu.uci.ics.hyracks.api.client.HyracksConnection;
@@ -32,13 +36,17 @@
 import edu.uci.ics.hyracks.api.client.NodeControllerInfo;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.api.topology.ClusterTopology;
+import edu.uci.ics.hyracks.hdfs.api.INcCollection;
+import edu.uci.ics.hyracks.hdfs.api.INcCollectionBuilder;
 
 /**
- * The scheduler conduct data-local scheduling for data reading on HDFS.
- * This class works for Hadoop old API.
+ * The scheduler conduct data-local scheduling for data reading on HDFS. This
+ * class works for Hadoop old API.
  */
 @SuppressWarnings("deprecation")
 public class Scheduler {
+    private static final Logger LOGGER = Logger.getLogger(Scheduler.class.getName());
 
     /** a list of NCs */
     private String[] NCs;
@@ -49,6 +57,14 @@
     /** a map from the NC name to the index */
     private Map<String, Integer> ncNameToIndex = new HashMap<String, Integer>();
 
+    /** a map from NC name to the NodeControllerInfo */
+    private Map<String, NodeControllerInfo> ncNameToNcInfos;
+
+    /**
+     * the nc collection builder
+     */
+    private INcCollectionBuilder ncCollectionBuilder;
+
     /**
      * The constructor of the scheduler.
      * 
@@ -58,7 +74,10 @@
     public Scheduler(String ipAddress, int port) throws HyracksException {
         try {
             IHyracksClientConnection hcc = new HyracksConnection(ipAddress, port);
-            Map<String, NodeControllerInfo> ncNameToNcInfos = hcc.getNodeControllerInfos();
+            this.ncNameToNcInfos = hcc.getNodeControllerInfos();
+            ClusterTopology topology = hcc.getClusterTopology();
+            this.ncCollectionBuilder = topology == null ? new IPProximityNcCollectionBuilder()
+                    : new RackAwareNcCollectionBuilder(topology);
             loadIPAddressToNCMap(ncNameToNcInfos);
         } catch (Exception e) {
             throw new HyracksException(e);
@@ -68,56 +87,122 @@
     /**
      * The constructor of the scheduler.
      * 
-     * @param ncNameToNcInfos the mapping from nc names to nc infos
+     * @param ncNameToNcInfos
+     * @throws HyracksException
+     */
+    public Scheduler(String ipAddress, int port, INcCollectionBuilder ncCollectionBuilder) throws HyracksException {
+        try {
+            IHyracksClientConnection hcc = new HyracksConnection(ipAddress, port);
+            this.ncNameToNcInfos = hcc.getNodeControllerInfos();
+            this.ncCollectionBuilder = ncCollectionBuilder;
+            loadIPAddressToNCMap(ncNameToNcInfos);
+        } catch (Exception e) {
+            throw new HyracksException(e);
+        }
+    }
+
+    /**
+     * The constructor of the scheduler.
+     * 
+     * @param ncNameToNcInfos
+     *            the mapping from nc names to nc infos
      * @throws HyracksException
      */
     public Scheduler(Map<String, NodeControllerInfo> ncNameToNcInfos) throws HyracksException {
+        this.ncNameToNcInfos = ncNameToNcInfos;
+        this.ncCollectionBuilder = new IPProximityNcCollectionBuilder();
         loadIPAddressToNCMap(ncNameToNcInfos);
     }
 
     /**
-     * Set location constraints for a file scan operator with a list of file splits.
-     * It guarantees the maximum slots a machine can is at most one more than the minimum slots a
-     * machine can get.
+     * The constructor of the scheduler.
+     * 
+     * @param ncNameToNcInfos
+     *            the mapping from nc names to nc infos
+     * @param topology
+     *            the hyracks cluster toplogy
+     * @throws HyracksException
+     */
+    public Scheduler(Map<String, NodeControllerInfo> ncNameToNcInfos, ClusterTopology topology) throws HyracksException {
+        this(ncNameToNcInfos);
+        this.ncCollectionBuilder = topology == null ? new IPProximityNcCollectionBuilder()
+                : new RackAwareNcCollectionBuilder(topology);
+    }
+
+    /**
+     * The constructor of the scheduler.
+     * 
+     * @param ncNameToNcInfos
+     *            the mapping from nc names to nc infos
+     * @throws HyracksException
+     */
+    public Scheduler(Map<String, NodeControllerInfo> ncNameToNcInfos, INcCollectionBuilder ncCollectionBuilder)
+            throws HyracksException {
+        this.ncNameToNcInfos = ncNameToNcInfos;
+        this.ncCollectionBuilder = ncCollectionBuilder;
+        loadIPAddressToNCMap(ncNameToNcInfos);
+    }
+
+    /**
+     * Set location constraints for a file scan operator with a list of file
+     * splits. It guarantees the maximum slots a machine can is at most one more
+     * than the minimum slots a machine can get.
      * 
      * @throws HyracksDataException
      */
     public String[] getLocationConstraints(InputSplit[] splits) throws HyracksException {
-        int[] capacity = new int[NCs.length];
-        Arrays.fill(capacity, 0);
+        if (splits == null) {
+            /** deal the case when the splits array is null */
+            return new String[] {};
+        }
+        int[] workloads = new int[NCs.length];
+        Arrays.fill(workloads, 0);
         String[] locations = new String[splits.length];
+        Map<String, IntWritable> locationToNumOfSplits = new HashMap<String, IntWritable>();
         /**
          * upper bound number of slots that a machine can get
          */
-        int upperBoundSlots = splits.length % capacity.length == 0 ? (splits.length / capacity.length) : (splits.length
-                / capacity.length + 1);
+        int upperBoundSlots = splits.length % workloads.length == 0 ? (splits.length / workloads.length)
+                : (splits.length / workloads.length + 1);
         /**
          * lower bound number of slots that a machine can get
          */
-        int lowerBoundSlots = splits.length % capacity.length == 0 ? upperBoundSlots : upperBoundSlots - 1;
+        int lowerBoundSlots = splits.length % workloads.length == 0 ? upperBoundSlots : upperBoundSlots - 1;
 
         try {
             Random random = new Random(System.currentTimeMillis());
             boolean scheduled[] = new boolean[splits.length];
             Arrays.fill(scheduled, false);
-
+            /**
+             * scan the splits and build the popularity map
+             * give the machines with less local splits more scheduling priority
+             */
+            buildPopularityMap(splits, locationToNumOfSplits);
             /**
              * push data-local lower-bounds slots to each machine
              */
-            scheduleLocalSlots(splits, capacity, locations, lowerBoundSlots, random, scheduled);
+            scheduleLocalSlots(splits, workloads, locations, lowerBoundSlots, random, scheduled, locationToNumOfSplits);
             /**
              * push data-local upper-bounds slots to each machine
              */
-            scheduleLocalSlots(splits, capacity, locations, upperBoundSlots, random, scheduled);
+            scheduleLocalSlots(splits, workloads, locations, upperBoundSlots, random, scheduled, locationToNumOfSplits);
 
+            int dataLocalCount = 0;
+            for (int i = 0; i < scheduled.length; i++) {
+                if (scheduled[i] == true) {
+                    dataLocalCount++;
+                }
+            }
+            LOGGER.info("Data local rate: "
+                    + (scheduled.length == 0 ? 0.0 : ((float) dataLocalCount / (float) (scheduled.length))));
             /**
              * push non-data-local lower-bounds slots to each machine
              */
-            scheduleNoLocalSlots(splits, capacity, locations, lowerBoundSlots, scheduled);
+            scheduleNonLocalSlots(splits, workloads, locations, lowerBoundSlots, scheduled);
             /**
              * push non-data-local upper-bounds slots to each machine
              */
-            scheduleNoLocalSlots(splits, capacity, locations, upperBoundSlots, scheduled);
+            scheduleNonLocalSlots(splits, workloads, locations, upperBoundSlots, scheduled);
             return locations;
         } catch (IOException e) {
             throw new HyracksException(e);
@@ -129,46 +214,38 @@
      * 
      * @param splits
      *            The HDFS file splits.
-     * @param capacity
+     * @param workloads
      *            The current capacity of each machine.
      * @param locations
      *            The result schedule.
-     * @param slots
+     * @param slotLimit
      *            The maximum slots of each machine.
      * @param scheduled
      *            Indicate which slot is scheduled.
      */
-    private void scheduleNoLocalSlots(InputSplit[] splits, int[] capacity, String[] locations, int slots,
-            boolean[] scheduled) {
+    private void scheduleNonLocalSlots(InputSplit[] splits, int[] workloads, String[] locations, int slotLimit,
+            boolean[] scheduled) throws IOException, UnknownHostException {
         /**
-         * find the lowest index the current available NCs
+         * build the map from available ips to the number of available slots
          */
-        int currentAvailableNC = 0;
-        for (int i = 0; i < capacity.length; i++) {
-            if (capacity[i] < slots) {
-                currentAvailableNC = i;
-                break;
-            }
+        INcCollection ncCollection = this.ncCollectionBuilder.build(ncNameToNcInfos, ipToNcMapping, ncNameToIndex, NCs,
+                workloads, slotLimit);
+        if (ncCollection.numAvailableSlots() == 0) {
+            return;
         }
-
         /**
          * schedule no-local file reads
          */
         for (int i = 0; i < splits.length; i++) {
-            // if there is no data-local NC choice, choose a random one
+            /** if there is no data-local NC choice, choose a random one */
             if (!scheduled[i]) {
-                locations[i] = NCs[currentAvailableNC];
-                capacity[currentAvailableNC]++;
-                scheduled[i] = true;
-
-                /**
-                 * move the available NC cursor to the next one
-                 */
-                for (int j = currentAvailableNC; j < capacity.length; j++) {
-                    if (capacity[j] < slots) {
-                        currentAvailableNC = j;
-                        break;
-                    }
+                InputSplit split = splits[i];
+                String selectedNcName = ncCollection.findNearestAvailableSlot(split);
+                if (selectedNcName != null) {
+                    int ncIndex = ncNameToIndex.get(selectedNcName);
+                    workloads[ncIndex]++;
+                    scheduled[i] = true;
+                    locations[i] = selectedNcName;
                 }
             }
         }
@@ -179,7 +256,7 @@
      * 
      * @param splits
      *            The HDFS file splits.
-     * @param capacity
+     * @param workloads
      *            The current capacity of each machine.
      * @param locations
      *            The result schedule.
@@ -192,19 +269,37 @@
      * @throws IOException
      * @throws UnknownHostException
      */
-    private void scheduleLocalSlots(InputSplit[] splits, int[] capacity, String[] locations, int slots, Random random,
-            boolean[] scheduled) throws IOException, UnknownHostException {
+    private void scheduleLocalSlots(InputSplit[] splits, int[] workloads, String[] locations, int slots, Random random,
+            boolean[] scheduled, final Map<String, IntWritable> locationToNumSplits) throws IOException,
+            UnknownHostException {
+        /** scheduling candidates will be ordered inversely according to their popularity */
+        PriorityQueue<String> scheduleCadndiates = new PriorityQueue<String>(3, new Comparator<String>() {
+
+            @Override
+            public int compare(String s1, String s2) {
+                return locationToNumSplits.get(s1).compareTo(locationToNumSplits.get(s2));
+            }
+
+        });
         for (int i = 0; i < splits.length; i++) {
+            if (scheduled[i]) {
+                continue;
+            }
             /**
              * get the location of all the splits
              */
-            String[] loc = splits[i].getLocations();
-            if (loc.length > 0) {
-                for (int j = 0; j < loc.length; j++) {
+            String[] locs = splits[i].getLocations();
+            if (locs.length > 0) {
+                scheduleCadndiates.clear();
+                for (int j = 0; j < locs.length; j++) {
+                    scheduleCadndiates.add(locs[j]);
+                }
+
+                for (String candidate : scheduleCadndiates) {
                     /**
                      * get all the IP addresses from the name
                      */
-                    InetAddress[] allIps = InetAddress.getAllByName(loc[j]);
+                    InetAddress[] allIps = InetAddress.getAllByName(candidate);
                     /**
                      * iterate overa all ips
                      */
@@ -223,16 +318,17 @@
                             /**
                              * check if the node is already full
                              */
-                            if (capacity[pos] < slots) {
+                            if (workloads[pos] < slots) {
                                 locations[i] = nc;
-                                capacity[pos]++;
+                                workloads[pos]++;
                                 scheduled[i] = true;
+                                break;
                             }
                         }
                     }
-
                     /**
-                     * break the loop for data-locations if the schedule has already been found
+                     * break the loop for data-locations if the schedule has
+                     * already been found
                      */
                     if (scheduled[i] == true) {
                         break;
@@ -243,6 +339,30 @@
     }
 
     /**
+     * Scan the splits once and build a popularity map
+     * 
+     * @param splits
+     *            the split array
+     * @param locationToNumOfSplits
+     *            the map to be built
+     * @throws IOException
+     */
+    private void buildPopularityMap(InputSplit[] splits, Map<String, IntWritable> locationToNumOfSplits)
+            throws IOException {
+        for (InputSplit split : splits) {
+            String[] locations = split.getLocations();
+            for (String loc : locations) {
+                IntWritable locCount = locationToNumOfSplits.get(loc);
+                if (locCount == null) {
+                    locCount = new IntWritable(0);
+                    locationToNumOfSplits.put(loc, locCount);
+                }
+                locCount.set(locCount.get() + 1);
+            }
+        }
+    }
+
+    /**
      * Load the IP-address-to-NC map from the NCNameToNCInfoMap
      * 
      * @param ncNameToNcInfos
@@ -251,6 +371,8 @@
     private void loadIPAddressToNCMap(Map<String, NodeControllerInfo> ncNameToNcInfos) throws HyracksException {
         try {
             NCs = new String[ncNameToNcInfos.size()];
+            ipToNcMapping.clear();
+            ncNameToIndex.clear();
             int i = 0;
 
             /**
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs2/scheduler/Scheduler.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs2/scheduler/Scheduler.java
index cb97ca1..cde187d 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs2/scheduler/Scheduler.java
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs2/scheduler/Scheduler.java
@@ -23,6 +23,7 @@
 import edu.uci.ics.hyracks.api.client.NodeControllerInfo;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
+import edu.uci.ics.hyracks.hdfs.api.INcCollectionBuilder;
 
 /**
  * The scheduler conduct data-local scheduling for data reading on HDFS.
@@ -53,6 +54,17 @@
     public Scheduler(Map<String, NodeControllerInfo> ncNameToNcInfos) throws HyracksException {
         scheduler = new edu.uci.ics.hyracks.hdfs.scheduler.Scheduler(ncNameToNcInfos);
     }
+    
+    /**
+     * The constructor of the scheduler.
+     * 
+     * @param ncNameToNcInfos
+     *            the mapping from nc names to nc infos
+     * @throws HyracksException
+     */
+    public Scheduler(Map<String, NodeControllerInfo> ncNameToNcInfos, INcCollectionBuilder builder) throws HyracksException {
+        scheduler = new edu.uci.ics.hyracks.hdfs.scheduler.Scheduler(ncNameToNcInfos, builder);
+    }
 
     /**
      * Set location constraints for a file scan operator with a list of file splits
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/scheduler/SchedulerTest.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/scheduler/SchedulerTest.java
index c6b0416..1f394a9 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/scheduler/SchedulerTest.java
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/scheduler/SchedulerTest.java
@@ -15,6 +15,8 @@
 
 package edu.uci.ics.hyracks.hdfs.scheduler;
 
+import java.io.FileReader;
+import java.io.IOException;
 import java.net.InetAddress;
 import java.util.HashMap;
 import java.util.Map;
@@ -25,13 +27,28 @@
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.mapred.FileSplit;
 import org.apache.hadoop.mapred.InputSplit;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
 
 import edu.uci.ics.hyracks.api.client.NodeControllerInfo;
 import edu.uci.ics.hyracks.api.client.NodeStatus;
 import edu.uci.ics.hyracks.api.comm.NetworkAddress;
+import edu.uci.ics.hyracks.api.topology.ClusterTopology;
+import edu.uci.ics.hyracks.api.topology.TopologyDefinitionParser;
 
 @SuppressWarnings("deprecation")
 public class SchedulerTest extends TestCase {
+    private static String TOPOLOGY_PATH = "src/test/resources/topology.xml";
+
+    private ClusterTopology parseTopology() throws IOException, SAXException {
+        FileReader fr = new FileReader(TOPOLOGY_PATH);
+        InputSource in = new InputSource(fr);
+        try {
+            return TopologyDefinitionParser.parse(in);
+        } finally {
+            fr.close();
+        }
+    }
 
     /**
      * Test the scheduler for the case when the Hyracks cluster is the HDFS cluster
@@ -41,17 +58,23 @@
     public void testSchedulerSimple() throws Exception {
         Map<String, NodeControllerInfo> ncNameToNcInfos = new HashMap<String, NodeControllerInfo>();
         ncNameToNcInfos.put("nc1", new NodeControllerInfo("nc1", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.1").getAddress(), 5099)));
+                .getByName("10.0.0.1").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.1")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc2", new NodeControllerInfo("nc2", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.2").getAddress(), 5099)));
+                .getByName("10.0.0.2").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.2")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc3", new NodeControllerInfo("nc3", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.3").getAddress(), 5099)));
+                .getByName("10.0.0.3").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.3")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc4", new NodeControllerInfo("nc4", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.4").getAddress(), 5099)));
+                .getByName("10.0.0.4").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.4")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc5", new NodeControllerInfo("nc5", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.5").getAddress(), 5099)));
+                .getByName("10.0.0.5").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.5")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc6", new NodeControllerInfo("nc6", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.6").getAddress(), 5099)));
+                .getByName("10.0.0.6").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.6")
+                .getAddress(), 5098)));
 
         InputSplit[] fileSplits = new InputSplit[6];
         fileSplits[0] = new FileSplit(new Path("part-1"), 0, 0, new String[] { "10.0.0.1", "10.0.0.2", "10.0.0.3" });
@@ -61,11 +84,17 @@
         fileSplits[4] = new FileSplit(new Path("part-5"), 0, 0, new String[] { "10.0.0.3", "10.0.0.4", "10.0.0.5" });
         fileSplits[5] = new FileSplit(new Path("part-6"), 0, 0, new String[] { "10.0.0.2", "10.0.0.3", "10.0.0.5" });
 
+        String[] expectedResults = new String[] { "nc1", "nc4", "nc6", "nc2", "nc3", "nc5" };
+
         Scheduler scheduler = new Scheduler(ncNameToNcInfos);
         String[] locationConstraints = scheduler.getLocationConstraints(fileSplits);
+        for (int i = 0; i < locationConstraints.length; i++) {
+            Assert.assertEquals(locationConstraints[i], expectedResults[i]);
+        }
 
-        String[] expectedResults = new String[] { "nc1", "nc3", "nc4", "nc2", "nc5", "nc6" };
-
+        ClusterTopology topology = parseTopology();
+        scheduler = new Scheduler(ncNameToNcInfos, topology);
+        locationConstraints = scheduler.getLocationConstraints(fileSplits);
         for (int i = 0; i < locationConstraints.length; i++) {
             Assert.assertEquals(locationConstraints[i], expectedResults[i]);
         }
@@ -79,17 +108,23 @@
     public void testSchedulerLargerHDFS() throws Exception {
         Map<String, NodeControllerInfo> ncNameToNcInfos = new HashMap<String, NodeControllerInfo>();
         ncNameToNcInfos.put("nc1", new NodeControllerInfo("nc1", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.1").getAddress(), 5099)));
+                .getByName("10.0.0.1").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.1")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc2", new NodeControllerInfo("nc2", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.2").getAddress(), 5099)));
+                .getByName("10.0.0.2").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.2")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc3", new NodeControllerInfo("nc3", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.3").getAddress(), 5099)));
+                .getByName("10.0.0.3").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.3")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc4", new NodeControllerInfo("nc4", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.4").getAddress(), 5099)));
-        ncNameToNcInfos.put("nc5", new NodeControllerInfo("nc5", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.5").getAddress(), 5099)));
-        ncNameToNcInfos.put("nc6", new NodeControllerInfo("nc6", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.6").getAddress(), 5099)));
+                .getByName("10.0.0.4").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.4")
+                .getAddress(), 5098)));
+        ncNameToNcInfos.put("nc7", new NodeControllerInfo("nc7", NodeStatus.ALIVE, new NetworkAddress(InetAddress
+                .getByName("10.0.0.7").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.5")
+                .getAddress(), 5098)));
+        ncNameToNcInfos.put("nc12", new NodeControllerInfo("nc12", NodeStatus.ALIVE, new NetworkAddress(InetAddress
+                .getByName("10.0.0.12").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.5")
+                .getAddress(), 5098)));
 
         InputSplit[] fileSplits = new InputSplit[12];
         fileSplits[0] = new FileSplit(new Path("part-1"), 0, 0, new String[] { "10.0.0.1", "10.0.0.2", "10.0.0.3" });
@@ -100,17 +135,25 @@
         fileSplits[5] = new FileSplit(new Path("part-6"), 0, 0, new String[] { "10.0.0.2", "10.0.0.3", "10.0.0.5" });
         fileSplits[6] = new FileSplit(new Path("part-7"), 0, 0, new String[] { "10.0.0.1", "10.0.0.2", "10.0.0.3" });
         fileSplits[7] = new FileSplit(new Path("part-8"), 0, 0, new String[] { "10.0.0.3", "10.0.0.4", "10.0.0.5" });
-        fileSplits[8] = new FileSplit(new Path("part-9"), 0, 0, new String[] { "10.0.0.4", "10.0.0.5", "10.0.0.6" });
+        fileSplits[8] = new FileSplit(new Path("part-12"), 0, 0, new String[] { "10.0.0.14", "10.0.0.11", "10.0.0.13" });
         fileSplits[9] = new FileSplit(new Path("part-10"), 0, 0, new String[] { "10.0.0.2", "10.0.0.1", "10.0.0.6" });
         fileSplits[10] = new FileSplit(new Path("part-11"), 0, 0, new String[] { "10.0.0.3", "10.0.0.4", "10.0.0.7" });
-        fileSplits[11] = new FileSplit(new Path("part-12"), 0, 0, new String[] { "10.0.0.2", "10.0.0.3", "10.0.0.5" });
+        fileSplits[11] = new FileSplit(new Path("part-9"), 0, 0, new String[] { "10.0.0.4", "10.0.0.5", "10.0.0.6" });
 
         Scheduler scheduler = new Scheduler(ncNameToNcInfos);
         String[] locationConstraints = scheduler.getLocationConstraints(fileSplits);
 
-        String[] expectedResults = new String[] { "nc1", "nc3", "nc4", "nc2", "nc3", "nc2", "nc1", "nc4", "nc5", "nc6",
-                "nc6", "nc5" };
+        String[] expectedResults = new String[] { "nc1", "nc4", "nc4", "nc1", "nc3", "nc2", "nc2", "nc3", "nc12",
+                "nc7", "nc7", "nc12" };
+        for (int i = 0; i < locationConstraints.length; i++) {
+            Assert.assertEquals(locationConstraints[i], expectedResults[i]);
+        }
 
+        expectedResults = new String[] { "nc1", "nc4", "nc4", "nc1", "nc3", "nc2", "nc2", "nc3", "nc7", "nc12", "nc7",
+                "nc12" };
+        ClusterTopology topology = parseTopology();
+        scheduler = new Scheduler(ncNameToNcInfos, topology);
+        locationConstraints = scheduler.getLocationConstraints(fileSplits);
         for (int i = 0; i < locationConstraints.length; i++) {
             Assert.assertEquals(locationConstraints[i], expectedResults[i]);
         }
@@ -124,17 +167,23 @@
     public void testSchedulerSmallerHDFS() throws Exception {
         Map<String, NodeControllerInfo> ncNameToNcInfos = new HashMap<String, NodeControllerInfo>();
         ncNameToNcInfos.put("nc1", new NodeControllerInfo("nc1", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.1").getAddress(), 5099)));
+                .getByName("10.0.0.1").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.1")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc2", new NodeControllerInfo("nc2", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.2").getAddress(), 5099)));
+                .getByName("10.0.0.2").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.2")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc3", new NodeControllerInfo("nc3", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.3").getAddress(), 5099)));
+                .getByName("10.0.0.3").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.3")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc4", new NodeControllerInfo("nc4", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.4").getAddress(), 5099)));
+                .getByName("10.0.0.4").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.4")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc5", new NodeControllerInfo("nc5", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.5").getAddress(), 5099)));
+                .getByName("10.0.0.5").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.5")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc6", new NodeControllerInfo("nc6", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.6").getAddress(), 5099)));
+                .getByName("10.0.0.6").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.6")
+                .getAddress(), 5098)));
 
         InputSplit[] fileSplits = new InputSplit[12];
         fileSplits[0] = new FileSplit(new Path("part-1"), 0, 0, new String[] { "10.0.0.1", "10.0.0.2", "10.0.0.3" });
@@ -150,12 +199,19 @@
         fileSplits[10] = new FileSplit(new Path("part-11"), 0, 0, new String[] { "10.0.0.3", "10.0.0.4", "10.0.0.5" });
         fileSplits[11] = new FileSplit(new Path("part-12"), 0, 0, new String[] { "10.0.0.2", "10.0.0.3", "10.0.0.5" });
 
+        String[] expectedResults = new String[] { "nc1", "nc4", "nc4", "nc1", "nc3", "nc2", "nc2", "nc3", "nc5", "nc6",
+                "nc5", "nc6" };
+
         Scheduler scheduler = new Scheduler(ncNameToNcInfos);
         String[] locationConstraints = scheduler.getLocationConstraints(fileSplits);
 
-        String[] expectedResults = new String[] { "nc1", "nc3", "nc4", "nc2", "nc3", "nc2", "nc1", "nc4", "nc5", "nc6",
-                "nc5", "nc6" };
+        for (int i = 0; i < locationConstraints.length; i++) {
+            Assert.assertEquals(locationConstraints[i], expectedResults[i]);
+        }
 
+        ClusterTopology topology = parseTopology();
+        scheduler = new Scheduler(ncNameToNcInfos, topology);
+        locationConstraints = scheduler.getLocationConstraints(fileSplits);
         for (int i = 0; i < locationConstraints.length; i++) {
             Assert.assertEquals(locationConstraints[i], expectedResults[i]);
         }
@@ -169,17 +225,23 @@
     public void testSchedulerSmallerHDFSOdd() throws Exception {
         Map<String, NodeControllerInfo> ncNameToNcInfos = new HashMap<String, NodeControllerInfo>();
         ncNameToNcInfos.put("nc1", new NodeControllerInfo("nc1", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.1").getAddress(), 5099)));
+                .getByName("10.0.0.1").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.1")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc2", new NodeControllerInfo("nc2", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.2").getAddress(), 5099)));
+                .getByName("10.0.0.2").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.2")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc3", new NodeControllerInfo("nc3", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.3").getAddress(), 5099)));
+                .getByName("10.0.0.3").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.3")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc4", new NodeControllerInfo("nc4", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.4").getAddress(), 5099)));
+                .getByName("10.0.0.4").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.4")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc5", new NodeControllerInfo("nc5", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.5").getAddress(), 5099)));
+                .getByName("10.0.0.5").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.5")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc6", new NodeControllerInfo("nc6", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.6").getAddress(), 5099)));
+                .getByName("10.0.0.6").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.6")
+                .getAddress(), 5098)));
 
         InputSplit[] fileSplits = new InputSplit[13];
         fileSplits[0] = new FileSplit(new Path("part-1"), 0, 0, new String[] { "10.0.0.1", "10.0.0.2", "10.0.0.3" });
@@ -196,15 +258,84 @@
         fileSplits[11] = new FileSplit(new Path("part-12"), 0, 0, new String[] { "10.0.0.2", "10.0.0.3", "10.0.0.5" });
         fileSplits[12] = new FileSplit(new Path("part-13"), 0, 0, new String[] { "10.0.0.2", "10.0.0.4", "10.0.0.5" });
 
+        String[] expectedResults = new String[] { "nc1", "nc4", "nc4", "nc1", "nc3", "nc2", "nc2", "nc3", "nc5", "nc1",
+                "nc5", "nc2", "nc4" };
+
         Scheduler scheduler = new Scheduler(ncNameToNcInfos);
         String[] locationConstraints = scheduler.getLocationConstraints(fileSplits);
 
-        String[] expectedResults = new String[] { "nc1", "nc3", "nc4", "nc2", "nc3", "nc2", "nc1", "nc4", "nc5", "nc6",
-                "nc5", "nc5", "nc6" };
-
         for (int i = 0; i < locationConstraints.length; i++) {
             Assert.assertEquals(locationConstraints[i], expectedResults[i]);
         }
+
+        ClusterTopology topology = parseTopology();
+        scheduler = new Scheduler(ncNameToNcInfos, topology);
+        locationConstraints = scheduler.getLocationConstraints(fileSplits);
+        for (int i = 0; i < locationConstraints.length; i++) {
+            Assert.assertEquals(locationConstraints[i], expectedResults[i]);
+        }
+
+    }
+
+    /**
+     * Test boundary cases where splits array is empty or null
+     * 
+     * @throws Exception
+     */
+    public void testSchedulercBoundary() throws Exception {
+        Map<String, NodeControllerInfo> ncNameToNcInfos = new HashMap<String, NodeControllerInfo>();
+        ncNameToNcInfos.put("nc1", new NodeControllerInfo("nc1", NodeStatus.ALIVE, new NetworkAddress(InetAddress
+                .getByName("10.0.0.1").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.1")
+                .getAddress(), 5098)));
+        ncNameToNcInfos.put("nc2", new NodeControllerInfo("nc2", NodeStatus.ALIVE, new NetworkAddress(InetAddress
+                .getByName("10.0.0.2").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.2")
+                .getAddress(), 5098)));
+        ncNameToNcInfos.put("nc3", new NodeControllerInfo("nc3", NodeStatus.ALIVE, new NetworkAddress(InetAddress
+                .getByName("10.0.0.3").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.3")
+                .getAddress(), 5098)));
+        ncNameToNcInfos.put("nc4", new NodeControllerInfo("nc4", NodeStatus.ALIVE, new NetworkAddress(InetAddress
+                .getByName("10.0.0.4").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.4")
+                .getAddress(), 5098)));
+        ncNameToNcInfos.put("nc5", new NodeControllerInfo("nc5", NodeStatus.ALIVE, new NetworkAddress(InetAddress
+                .getByName("10.0.0.5").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.5")
+                .getAddress(), 5098)));
+        ncNameToNcInfos.put("nc6", new NodeControllerInfo("nc6", NodeStatus.ALIVE, new NetworkAddress(InetAddress
+                .getByName("10.0.0.6").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.6")
+                .getAddress(), 5098)));
+
+        /** test empty file splits */
+        InputSplit[] fileSplits = new InputSplit[0];
+        String[] expectedResults = new String[] {};
+
+        Scheduler scheduler = new Scheduler(ncNameToNcInfos);
+        String[] locationConstraints = scheduler.getLocationConstraints(fileSplits);
+
+        for (int i = 0; i < locationConstraints.length; i++) {
+            Assert.assertEquals(locationConstraints[i], expectedResults[i]);
+        }
+
+        ClusterTopology topology = parseTopology();
+        scheduler = new Scheduler(ncNameToNcInfos, topology);
+        locationConstraints = scheduler.getLocationConstraints(fileSplits);
+        for (int i = 0; i < locationConstraints.length; i++) {
+            Assert.assertEquals(locationConstraints[i], expectedResults[i]);
+        }
+
+        fileSplits = null;
+        expectedResults = new String[] {};
+
+        scheduler = new Scheduler(ncNameToNcInfos);
+        locationConstraints = scheduler.getLocationConstraints(fileSplits);
+        for (int i = 0; i < locationConstraints.length; i++) {
+            Assert.assertEquals(locationConstraints[i], expectedResults[i]);
+        }
+
+        scheduler = new Scheduler(ncNameToNcInfos, topology);
+        locationConstraints = scheduler.getLocationConstraints(fileSplits);
+        for (int i = 0; i < locationConstraints.length; i++) {
+            Assert.assertEquals(locationConstraints[i], expectedResults[i]);
+        }
+
     }
 
 }
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/utils/HyracksUtils.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/utils/HyracksUtils.java
index d44b75a..8c12518 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/utils/HyracksUtils.java
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs/utils/HyracksUtils.java
@@ -64,6 +64,7 @@
         ncConfig1.clusterNetIPAddress = "localhost";
         ncConfig1.ccPort = TEST_HYRACKS_CC_PORT;
         ncConfig1.dataIPAddress = "127.0.0.1";
+        ncConfig1.datasetIPAddress = "127.0.0.1";
         ncConfig1.nodeId = NC1_ID;
         nc1 = new NodeControllerService(ncConfig1);
         nc1.start();
@@ -73,6 +74,7 @@
         ncConfig2.clusterNetIPAddress = "localhost";
         ncConfig2.ccPort = TEST_HYRACKS_CC_PORT;
         ncConfig2.dataIPAddress = "127.0.0.1";
+        ncConfig2.datasetIPAddress = "127.0.0.1";
         ncConfig2.nodeId = NC2_ID;
         nc2 = new NodeControllerService(ncConfig2);
         nc2.start();
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs2/scheduler/SchedulerTest.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs2/scheduler/SchedulerTest.java
index 4b1e11c..442aeae 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs2/scheduler/SchedulerTest.java
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/java/edu/uci/ics/hyracks/hdfs2/scheduler/SchedulerTest.java
@@ -45,17 +45,23 @@
     public void testSchedulerSimple() throws Exception {
         Map<String, NodeControllerInfo> ncNameToNcInfos = new HashMap<String, NodeControllerInfo>();
         ncNameToNcInfos.put("nc1", new NodeControllerInfo("nc1", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.1").getAddress(), 5099)));
+                .getByName("10.0.0.1").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.1")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc2", new NodeControllerInfo("nc2", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.2").getAddress(), 5099)));
+                .getByName("10.0.0.2").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.2")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc3", new NodeControllerInfo("nc3", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.3").getAddress(), 5099)));
+                .getByName("10.0.0.3").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.3")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc4", new NodeControllerInfo("nc4", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.4").getAddress(), 5099)));
+                .getByName("10.0.0.4").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.4")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc5", new NodeControllerInfo("nc5", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.5").getAddress(), 5099)));
+                .getByName("10.0.0.5").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.5")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc6", new NodeControllerInfo("nc6", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.6").getAddress(), 5099)));
+                .getByName("10.0.0.6").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.6")
+                .getAddress(), 5098)));
 
         List<InputSplit> fileSplits = new ArrayList<InputSplit>();
         fileSplits.add(new FileSplit(new Path("part-1"), 0, 0, new String[] { "10.0.0.1", "10.0.0.2", "10.0.0.3" }));
@@ -68,7 +74,7 @@
         Scheduler scheduler = new Scheduler(ncNameToNcInfos);
         String[] locationConstraints = scheduler.getLocationConstraints(fileSplits);
 
-        String[] expectedResults = new String[] { "nc1", "nc3", "nc4", "nc2", "nc5", "nc6" };
+        String[] expectedResults = new String[] { "nc1", "nc4", "nc6", "nc2", "nc3", "nc5" };
 
         for (int i = 0; i < locationConstraints.length; i++) {
             Assert.assertEquals(locationConstraints[i], expectedResults[i]);
@@ -83,17 +89,23 @@
     public void testSchedulerLargerHDFS() throws Exception {
         Map<String, NodeControllerInfo> ncNameToNcInfos = new HashMap<String, NodeControllerInfo>();
         ncNameToNcInfos.put("nc1", new NodeControllerInfo("nc1", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.1").getAddress(), 5099)));
+                .getByName("10.0.0.1").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.1")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc2", new NodeControllerInfo("nc2", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.2").getAddress(), 5099)));
+                .getByName("10.0.0.2").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.2")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc3", new NodeControllerInfo("nc3", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.3").getAddress(), 5099)));
+                .getByName("10.0.0.3").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.3")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc4", new NodeControllerInfo("nc4", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.4").getAddress(), 5099)));
+                .getByName("10.0.0.4").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.4")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc5", new NodeControllerInfo("nc5", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.5").getAddress(), 5099)));
+                .getByName("10.0.0.5").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.5")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc6", new NodeControllerInfo("nc6", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.6").getAddress(), 5099)));
+                .getByName("10.0.0.6").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.6")
+                .getAddress(), 5098)));
 
         List<InputSplit> fileSplits = new ArrayList<InputSplit>();
         fileSplits.add(new FileSplit(new Path("part-1"), 0, 0, new String[] { "10.0.0.1", "10.0.0.2", "10.0.0.3" }));
@@ -112,8 +124,8 @@
         Scheduler scheduler = new Scheduler(ncNameToNcInfos);
         String[] locationConstraints = scheduler.getLocationConstraints(fileSplits);
 
-        String[] expectedResults = new String[] { "nc1", "nc3", "nc4", "nc2", "nc3", "nc2", "nc1", "nc4", "nc5", "nc6",
-                "nc6", "nc5" };
+        String[] expectedResults = new String[] { "nc1", "nc4", "nc6", "nc1", "nc4", "nc2", "nc2", "nc3", "nc6", "nc5",
+                "nc3", "nc5" };
 
         for (int i = 0; i < locationConstraints.length; i++) {
             Assert.assertEquals(locationConstraints[i], expectedResults[i]);
@@ -128,17 +140,23 @@
     public void testSchedulerSmallerHDFS() throws Exception {
         Map<String, NodeControllerInfo> ncNameToNcInfos = new HashMap<String, NodeControllerInfo>();
         ncNameToNcInfos.put("nc1", new NodeControllerInfo("nc1", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.1").getAddress(), 5099)));
+                .getByName("10.0.0.1").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.1")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc2", new NodeControllerInfo("nc2", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.2").getAddress(), 5099)));
+                .getByName("10.0.0.2").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.2")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc3", new NodeControllerInfo("nc3", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.3").getAddress(), 5099)));
+                .getByName("10.0.0.3").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.3")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc4", new NodeControllerInfo("nc4", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.4").getAddress(), 5099)));
+                .getByName("10.0.0.4").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.4")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc5", new NodeControllerInfo("nc5", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.5").getAddress(), 5099)));
+                .getByName("10.0.0.5").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.5")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc6", new NodeControllerInfo("nc6", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.6").getAddress(), 5099)));
+                .getByName("10.0.0.6").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.6")
+                .getAddress(), 5098)));
 
         List<InputSplit> fileSplits = new ArrayList<InputSplit>();
         fileSplits.add(new FileSplit(new Path("part-1"), 0, 0, new String[] { "10.0.0.1", "10.0.0.2", "10.0.0.3" }));
@@ -157,7 +175,7 @@
         Scheduler scheduler = new Scheduler(ncNameToNcInfos);
         String[] locationConstraints = scheduler.getLocationConstraints(fileSplits);
 
-        String[] expectedResults = new String[] { "nc1", "nc3", "nc4", "nc2", "nc3", "nc2", "nc1", "nc4", "nc5", "nc6",
+        String[] expectedResults = new String[] { "nc1", "nc4", "nc4", "nc1", "nc3", "nc2", "nc2", "nc3", "nc5", "nc6",
                 "nc5", "nc6" };
 
         for (int i = 0; i < locationConstraints.length; i++) {
@@ -173,17 +191,23 @@
     public void testSchedulerSmallerHDFSOdd() throws Exception {
         Map<String, NodeControllerInfo> ncNameToNcInfos = new HashMap<String, NodeControllerInfo>();
         ncNameToNcInfos.put("nc1", new NodeControllerInfo("nc1", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.1").getAddress(), 5099)));
+                .getByName("10.0.0.1").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.1")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc2", new NodeControllerInfo("nc2", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.2").getAddress(), 5099)));
+                .getByName("10.0.0.2").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.2")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc3", new NodeControllerInfo("nc3", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.3").getAddress(), 5099)));
+                .getByName("10.0.0.3").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.3")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc4", new NodeControllerInfo("nc4", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.4").getAddress(), 5099)));
+                .getByName("10.0.0.4").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.4")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc5", new NodeControllerInfo("nc5", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.5").getAddress(), 5099)));
+                .getByName("10.0.0.5").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.5")
+                .getAddress(), 5098)));
         ncNameToNcInfos.put("nc6", new NodeControllerInfo("nc6", NodeStatus.ALIVE, new NetworkAddress(InetAddress
-                .getByName("10.0.0.6").getAddress(), 5099)));
+                .getByName("10.0.0.6").getAddress(), 5099), new NetworkAddress(InetAddress.getByName("10.0.0.6")
+                .getAddress(), 5098)));
 
         List<InputSplit> fileSplits = new ArrayList<InputSplit>();
         fileSplits.add(new FileSplit(new Path("part-1"), 0, 0, new String[] { "10.0.0.1", "10.0.0.2", "10.0.0.3" }));
@@ -203,8 +227,8 @@
         Scheduler scheduler = new Scheduler(ncNameToNcInfos);
         String[] locationConstraints = scheduler.getLocationConstraints(fileSplits);
 
-        String[] expectedResults = new String[] { "nc1", "nc3", "nc4", "nc2", "nc3", "nc2", "nc1", "nc4", "nc5", "nc6",
-                "nc5", "nc5", "nc6" };
+        String[] expectedResults = new String[] { "nc1", "nc4", "nc4", "nc1", "nc3", "nc2", "nc2", "nc3", "nc5", "nc1",
+                "nc5", "nc2", "nc4" };
 
         for (int i = 0; i < locationConstraints.length; i++) {
             Assert.assertEquals(locationConstraints[i], expectedResults[i]);
diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/resources/topology.xml b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/resources/topology.xml
new file mode 100644
index 0000000..3a0ac7e
--- /dev/null
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/test/resources/topology.xml
@@ -0,0 +1,32 @@
+<cluster-topology>
+	<network-switch name="all">
+		<network-switch name="rack1">
+			<terminal name="10.0.0.1" />
+			<terminal name="10.0.0.5" />
+			<terminal name="10.0.0.9" />
+			<terminal name="10.0.0.13" />
+			<terminal name="10.0.0.17" />
+		</network-switch>
+		<network-switch name="rack2">
+			<terminal name="10.0.0.2" />
+			<terminal name="10.0.0.6" />
+			<terminal name="10.0.0.10" />
+			<terminal name="10.0.0.14" />
+			<terminal name="10.0.0.18" />
+		</network-switch>
+		<network-switch name="rack3">
+			<terminal name="10.0.0.3" />
+			<terminal name="10.0.0.7" />
+			<terminal name="10.0.0.11" />
+			<terminal name="10.0.0.15" />
+			<terminal name="10.0.0.19" />
+		</network-switch>
+		<network-switch name="rack4">
+			<terminal name="10.0.0.4" />
+			<terminal name="10.0.0.8" />
+			<terminal name="10.0.0.12" />
+			<terminal name="10.0.0.16" />
+			<terminal name="10.0.0.20" />
+		</network-switch>
+	</network-switch>
+</cluster-topology>
\ No newline at end of file
diff --git a/hyracks/hyracks-hdfs/pom.xml b/hyracks/hyracks-hdfs/pom.xml
index 5ed76e9..bea1244 100644
--- a/hyracks/hyracks-hdfs/pom.xml
+++ b/hyracks/hyracks-hdfs/pom.xml
@@ -8,7 +8,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/hyracks-ipc/pom.xml b/hyracks/hyracks-ipc/pom.xml
index 6f5e09f..14121fd 100644
--- a/hyracks/hyracks-ipc/pom.xml
+++ b/hyracks/hyracks-ipc/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
diff --git a/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/pom.xml b/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/pom.xml
index a8fc29e..e8342a3 100644
--- a/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/pom.xml
+++ b/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-maven-plugins</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
diff --git a/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/src/main/java/edu/uci/ics/hyracks/maven/plugin/HyracksNCStartMojo.java b/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/src/main/java/edu/uci/ics/hyracks/maven/plugin/HyracksNCStartMojo.java
index 47de024..fc06a68 100644
--- a/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/src/main/java/edu/uci/ics/hyracks/maven/plugin/HyracksNCStartMojo.java
+++ b/hyracks/hyracks-maven-plugins/hyracks-virtualcluster-maven-plugin/src/main/java/edu/uci/ics/hyracks/maven/plugin/HyracksNCStartMojo.java
@@ -55,6 +55,7 @@
         cmdLineBuffer.append(" -data-ip-address ").append(dataIpAddress);
         cmdLineBuffer.append(" -node-id ").append(nodeId);
         cmdLineBuffer.append(" -cluster-net-ip-address 127.0.0.1");
+        cmdLineBuffer.append(" -result-ip-address 127.0.0.1");
         if (ccPort != 0) {
             cmdLineBuffer.append(" -cc-port ").append(ccPort);
         }
diff --git a/hyracks/hyracks-maven-plugins/pom.xml b/hyracks/hyracks-maven-plugins/pom.xml
index d9223ba..ee97d58 100644
--- a/hyracks/hyracks-maven-plugins/pom.xml
+++ b/hyracks/hyracks-maven-plugins/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <dependencies>
diff --git a/hyracks/hyracks-net/pom.xml b/hyracks/hyracks-net/pom.xml
index fb486df..de2a2a0 100644
--- a/hyracks/hyracks-net/pom.xml
+++ b/hyracks/hyracks-net/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
diff --git a/hyracks/hyracks-net/src/main/java/edu/uci/ics/hyracks/net/protocols/muxdemux/MuxDemux.java b/hyracks/hyracks-net/src/main/java/edu/uci/ics/hyracks/net/protocols/muxdemux/MuxDemux.java
index c719bc4..e4df6b9 100644
--- a/hyracks/hyracks-net/src/main/java/edu/uci/ics/hyracks/net/protocols/muxdemux/MuxDemux.java
+++ b/hyracks/hyracks-net/src/main/java/edu/uci/ics/hyracks/net/protocols/muxdemux/MuxDemux.java
@@ -48,9 +48,9 @@
      * Constructor.
      * 
      * @param localAddress
-     *            - TCP/IP socket address to listen on
+     *            - TCP/IP socket address to listen on. Null for non-listening unidirectional sockets
      * @param listener
-     *            - Callback interface to report channel events
+     *            - Callback interface to report channel events. Null for non-listening unidirectional sockets
      * @param nThreads
      *            - Number of threads to use for data transfer
      * @param maxConnectionAttempts
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 d13a17e..a9061e1 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
@@ -45,15 +45,23 @@
     }
 
     public void start(InetSocketAddress localAddress) throws IOException {
-        serverSocketChannel = ServerSocketChannel.open();
-        ServerSocket serverSocket = serverSocketChannel.socket();
-        serverSocket.bind(localAddress);
-        this.localAddress = (InetSocketAddress) serverSocket.getLocalSocketAddress();
+        // Setup a server socket listening channel only if the TCPEndpoint is a listening endpoint.
+        if (localAddress != null) {
+            serverSocketChannel = ServerSocketChannel.open();
+            ServerSocket serverSocket = serverSocketChannel.socket();
+            serverSocket.bind(localAddress);
+            this.localAddress = (InetSocketAddress) serverSocket.getLocalSocketAddress();
+        }
+
         ioThreads = new IOThread[nThreads];
         for (int i = 0; i < ioThreads.length; ++i) {
             ioThreads[i] = new IOThread();
         }
-        ioThreads[0].registerServerSocket(serverSocketChannel);
+
+        if (localAddress != null) {
+            ioThreads[0].registerServerSocket(serverSocketChannel);
+        }
+
         for (int i = 0; i < ioThreads.length; ++i) {
             ioThreads[i].start();
         }
diff --git a/hyracks/hyracks-server/pom.xml b/hyracks/hyracks-server/pom.xml
index e0fc40a..85af7f2 100644
--- a/hyracks/hyracks-server/pom.xml
+++ b/hyracks/hyracks-server/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -74,14 +74,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-cc</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-nc</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-storage-am-btree/pom.xml b/hyracks/hyracks-storage-am-btree/pom.xml
index f251d51..4555ea4 100644
--- a/hyracks/hyracks-storage-am-btree/pom.xml
+++ b/hyracks/hyracks-storage-am-btree/pom.xml
@@ -2,13 +2,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-am-btree</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-am-btree</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -29,28 +29,28 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
         <dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
diff --git a/hyracks/hyracks-storage-am-common/pom.xml b/hyracks/hyracks-storage-am-common/pom.xml
index dbc4f41..48f91fa 100644
--- a/hyracks/hyracks-storage-am-common/pom.xml
+++ b/hyracks/hyracks-storage-am-common/pom.xml
@@ -2,13 +2,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-am-common</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-am-common</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -29,28 +29,28 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-storage-am-invertedindex/pom.xml b/hyracks/hyracks-storage-am-invertedindex/pom.xml
index 5fe2d96..8fc8855 100644
--- a/hyracks/hyracks-storage-am-invertedindex/pom.xml
+++ b/hyracks/hyracks-storage-am-invertedindex/pom.xml
@@ -2,13 +2,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-am-invertedindex</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-am-invertedindex</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -29,28 +29,28 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>    
diff --git a/hyracks/hyracks-storage-am-rtree/pom.xml b/hyracks/hyracks-storage-am-rtree/pom.xml
index 6c2d734..74d8927 100644
--- a/hyracks/hyracks-storage-am-rtree/pom.xml
+++ b/hyracks/hyracks-storage-am-rtree/pom.xml
@@ -2,13 +2,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-am-rtree</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-am-rtree</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -29,21 +29,21 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-dataflow-std</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>  	
diff --git a/hyracks/hyracks-storage-common/pom.xml b/hyracks/hyracks-storage-common/pom.xml
index 3360097..568b0ba 100644
--- a/hyracks/hyracks-storage-common/pom.xml
+++ b/hyracks/hyracks-storage-common/pom.xml
@@ -2,13 +2,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-common</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-common</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -29,7 +29,7 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-api</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-test-support/pom.xml b/hyracks/hyracks-test-support/pom.xml
index 89233c9..1ddd1df 100644
--- a/hyracks/hyracks-test-support/pom.xml
+++ b/hyracks/hyracks-test-support/pom.xml
@@ -2,13 +2,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-test-support</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-test-support</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -29,33 +29,33 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-control-nc</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-rtree</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-invertedindex</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestTaskContext.java b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestTaskContext.java
index c122b25..0ca93b2 100644
--- a/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestTaskContext.java
+++ b/hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/test/support/TestTaskContext.java
@@ -20,6 +20,7 @@
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.dataflow.TaskAttemptId;
 import edu.uci.ics.hyracks.api.dataflow.state.IStateObject;
+import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionManager;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.exceptions.HyracksException;
 import edu.uci.ics.hyracks.api.io.FileReference;
@@ -101,6 +102,11 @@
     }
 
     @Override
+    public IDatasetPartitionManager getDatasetPartitionManager() {
+        return null;
+    }
+
+    @Override
     public void sendApplicationMessageToCC(byte[] message, String nodeId) throws Exception {
         // TODO Auto-generated method stub
 
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 d0bb883..880cba5 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-btree-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-am-btree-test/pom.xml
@@ -2,13 +2,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-am-btree-test</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-am-btree-test</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-tests</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -36,14 +36,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-btree</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>test</scope>
   	</dependency>
diff --git a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/pom.xml b/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/pom.xml
index 59c8c46..5eda528 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-am-invertedindex-test/pom.xml
@@ -2,13 +2,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-am-invertedindex-test</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-am-invertedindex-test</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-tests</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -30,14 +30,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-invertedindex</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>test</scope>
   	</dependency>
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 7b1a3f3..5031dba 100644
--- a/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-am-rtree-test/pom.xml
@@ -2,13 +2,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-am-rtree-test</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-am-rtree-test</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-tests</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -36,14 +36,14 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-am-rtree</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>test</scope>
   	</dependency>
diff --git a/hyracks/hyracks-tests/hyracks-storage-common-test/pom.xml b/hyracks/hyracks-tests/hyracks-storage-common-test/pom.xml
index 8e429f9..72d76e0 100644
--- a/hyracks/hyracks-tests/hyracks-storage-common-test/pom.xml
+++ b/hyracks/hyracks-tests/hyracks-storage-common-test/pom.xml
@@ -2,13 +2,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-storage-common-test</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <name>hyracks-storage-common-test</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks-tests</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -36,13 +36,13 @@
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-storage-common</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<scope>compile</scope>
   	</dependency>
   	<dependency>
   		<groupId>edu.uci.ics.hyracks</groupId>
   		<artifactId>hyracks-test-support</artifactId>
-  		<version>0.2.3-SNAPSHOT</version>
+  		<version>0.2.4-SNAPSHOT</version>
   		<type>jar</type>
   		<scope>compile</scope>
   	</dependency>
diff --git a/hyracks/hyracks-tests/pom.xml b/hyracks/hyracks-tests/pom.xml
index 054ec68..5a3d594 100644
--- a/hyracks/hyracks-tests/pom.xml
+++ b/hyracks/hyracks-tests/pom.xml
@@ -2,14 +2,14 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks-tests</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>hyracks-tests</name>
 
   <parent>
     <groupId>edu.uci.ics.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.3-SNAPSHOT</version>
+    <version>0.2.4-SNAPSHOT</version>
   </parent>
 
   <modules>
diff --git a/hyracks/pom.xml b/hyracks/pom.xml
index 09925fb..2810aa1 100644
--- a/hyracks/pom.xml
+++ b/hyracks/pom.xml
@@ -3,12 +3,12 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>hyracks</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>hyracks</name>
 
   <properties>
-    <jvm.extraargs/>
+    <jvm.extraargs />
   </properties>
 
   <build>
@@ -83,6 +83,8 @@
   <modules>
     <module>hyracks-ipc</module>
     <module>hyracks-api</module>
+    <module>hyracks-comm</module>
+    <module>hyracks-client</module>
     <module>hyracks-dataflow-common</module>
     <module>hyracks-dataflow-std</module>
     <module>hyracks-dataflow-hadoop</module>
diff --git a/pom.xml b/pom.xml
index f1185af..1042f6e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>fullstack</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>hyracks-ecosystem-full-stack</name>
 
diff --git a/pregelix/pom.xml b/pregelix/pom.xml
index 7d08fb7..0d2bdba 100644
--- a/pregelix/pom.xml
+++ b/pregelix/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>edu.uci.ics.hyracks</groupId>
   <artifactId>pregelix</artifactId>
-  <version>0.2.3-SNAPSHOT</version>
+  <version>0.2.4-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>pregelix</name>
 
diff --git a/pregelix/pregelix-api/pom.xml b/pregelix/pregelix-api/pom.xml
index 8212e1c..b8bfce9 100644
--- a/pregelix/pregelix-api/pom.xml
+++ b/pregelix/pregelix-api/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 	<properties>
@@ -67,7 +67,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -80,7 +80,7 @@
 		<dependency>
                         <groupId>edu.uci.ics.hyracks</groupId>
                         <artifactId>hyracks-hdfs-core</artifactId>
-                        <version>0.2.3-SNAPSHOT</version>
+                        <version>0.2.4-SNAPSHOT</version>
                         <type>jar</type>
                         <scope>compile</scope>
                 </dependency>
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/Vertex.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/Vertex.java
index 3a98fd9..724ec14 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/Vertex.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/Vertex.java
@@ -49,510 +49,531 @@
  */
 @SuppressWarnings("rawtypes")
 public abstract class Vertex<I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable>
-        implements Writable {
-    private static long superstep = 0;
-    /** Class-wide number of vertices */
-    private static long numVertices = -1;
-    /** Class-wide number of edges */
-    private static long numEdges = -1;
-    /** Vertex id */
-    private I vertexId = null;
-    /** Vertex value */
-    private V vertexValue = null;
-    /** Map of destination vertices and their edge values */
-    private final List<Edge<I, E>> destEdgeList = new ArrayList<Edge<I, E>>();
-    /** If true, do not do anymore computation on this vertex. */
-    boolean halt = false;
-    /** List of incoming messages from the previous superstep */
-    private final List<M> msgList = new ArrayList<M>();
-    /** map context */
-    private static TaskAttemptContext context = null;
-    /** a delegate for hyracks stuff */
-    private VertexDelegate<I, V, E, M> delegate = new VertexDelegate<I, V, E, M>(this);
-    /** this vertex is updated or not */
-    private boolean updated = false;
-    /** has outgoing messages */
-    private boolean hasMessage = false;
-    /** created new vertex */
-    private boolean createdNewLiveVertex = false;
+		implements Writable {
+	private static long superstep = 0;
+	/** Class-wide number of vertices */
+	private static long numVertices = -1;
+	/** Class-wide number of edges */
+	private static long numEdges = -1;
+	/** Vertex id */
+	private I vertexId = null;
+	/** Vertex value */
+	private V vertexValue = null;
+	/** Map of destination vertices and their edge values */
+	private final List<Edge<I, E>> destEdgeList = new ArrayList<Edge<I, E>>();
+	/** If true, do not do anymore computation on this vertex. */
+	boolean halt = false;
+	/** List of incoming messages from the previous superstep */
+	private final List<M> msgList = new ArrayList<M>();
+	/** map context */
+	private static TaskAttemptContext context = null;
+	/** a delegate for hyracks stuff */
+	private VertexDelegate<I, V, E, M> delegate = new VertexDelegate<I, V, E, M>(
+			this);
+	/** this vertex is updated or not */
+	private boolean updated = false;
+	/** has outgoing messages */
+	private boolean hasMessage = false;
+	/** created new vertex */
+	private boolean createdNewLiveVertex = false;
 
-    /**
-     * use object pool for re-using objects
-     */
-    private List<Edge<I, E>> edgePool = new ArrayList<Edge<I, E>>();
-    private List<M> msgPool = new ArrayList<M>();
-    private List<V> valuePool = new ArrayList<V>();
-    private int usedEdge = 0;
-    private int usedMessage = 0;
-    private int usedValue = 0;
+	/**
+	 * use object pool for re-using objects
+	 */
+	private List<Edge<I, E>> edgePool = new ArrayList<Edge<I, E>>();
+	private List<M> msgPool = new ArrayList<M>();
+	private List<V> valuePool = new ArrayList<V>();
+	private int usedEdge = 0;
+	private int usedMessage = 0;
+	private int usedValue = 0;
 
-    /**
-     * The key method that users need to implement
-     * 
-     * @param msgIterator
-     *            an iterator of incoming messages
-     */
-    public abstract void compute(Iterator<M> msgIterator);
+	/**
+	 * The key method that users need to implement
+	 * 
+	 * @param msgIterator
+	 *            an iterator of incoming messages
+	 */
+	public abstract void compute(Iterator<M> msgIterator);
 
-    /**
-     * Add an edge for the vertex.
-     * 
-     * @param targetVertexId
-     * @param edgeValue
-     * @return successful or not
-     */
-    public final boolean addEdge(I targetVertexId, E edgeValue) {
-        Edge<I, E> edge = this.allocateEdge();
-        edge.setDestVertexId(targetVertexId);
-        edge.setEdgeValue(edgeValue);
-        destEdgeList.add(edge);
-        return true;
-    }
+	/**
+	 * Add an edge for the vertex.
+	 * 
+	 * @param targetVertexId
+	 * @param edgeValue
+	 * @return successful or not
+	 */
+	public final boolean addEdge(I targetVertexId, E edgeValue) {
+		Edge<I, E> edge = this.allocateEdge();
+		edge.setDestVertexId(targetVertexId);
+		edge.setEdgeValue(edgeValue);
+		destEdgeList.add(edge);
+		updated = true;
+		return true;
+	}
 
-    /**
-     * Initialize a new vertex
-     * 
-     * @param vertexId
-     * @param vertexValue
-     * @param edges
-     * @param messages
-     */
-    public void initialize(I vertexId, V vertexValue, Map<I, E> edges, List<M> messages) {
-        if (vertexId != null) {
-            setVertexId(vertexId);
-        }
-        if (vertexValue != null) {
-            setVertexValue(vertexValue);
-        }
-        destEdgeList.clear();
-        if (edges != null && !edges.isEmpty()) {
-            for (Map.Entry<I, E> entry : edges.entrySet()) {
-                destEdgeList.add(new Edge<I, E>(entry.getKey(), entry.getValue()));
-            }
-        }
-        if (messages != null && !messages.isEmpty()) {
-            msgList.addAll(messages);
-        }
-    }
+	/**
+	 * Initialize a new vertex
+	 * 
+	 * @param vertexId
+	 * @param vertexValue
+	 * @param edges
+	 * @param messages
+	 */
+	public void initialize(I vertexId, V vertexValue, Map<I, E> edges,
+			List<M> messages) {
+		if (vertexId != null) {
+			setVertexId(vertexId);
+		}
+		if (vertexValue != null) {
+			setVertexValue(vertexValue);
+		}
+		destEdgeList.clear();
+		if (edges != null && !edges.isEmpty()) {
+			for (Map.Entry<I, E> entry : edges.entrySet()) {
+				destEdgeList.add(new Edge<I, E>(entry.getKey(), entry
+						.getValue()));
+			}
+		}
+		if (messages != null && !messages.isEmpty()) {
+			msgList.addAll(messages);
+		}
+	}
 
-    /**
-     * reset a vertex object: clear its internal states
-     */
-    public void reset() {
-        usedEdge = 0;
-        usedMessage = 0;
-        usedValue = 0;
-    }
+	/**
+	 * reset a vertex object: clear its internal states
+	 */
+	public void reset() {
+		usedEdge = 0;
+		usedMessage = 0;
+		usedValue = 0;
+		updated = false;
+	}
 
-    /**
-     * Set the vertex id
-     * 
-     * @param vertexId
-     */
-    public final void setVertexId(I vertexId) {
-        this.vertexId = vertexId;
-        delegate.setVertexId(vertexId);
-    }
+	/**
+	 * Set the vertex id
+	 * 
+	 * @param vertexId
+	 */
+	public final void setVertexId(I vertexId) {
+		this.vertexId = vertexId;
+		delegate.setVertexId(vertexId);
+	}
 
-    /**
-     * Get the vertex id
-     * 
-     * @return vertex id
-     */
-    public final I getVertexId() {
-        return vertexId;
-    }
+	/**
+	 * Get the vertex id
+	 * 
+	 * @return vertex id
+	 */
+	public final I getVertexId() {
+		return vertexId;
+	}
 
-    /**
-     * Get the vertex value
-     * 
-     * @return the vertex value
-     */
-    public final V getVertexValue() {
-        return vertexValue;
-    }
+	/**
+	 * Get the vertex value
+	 * 
+	 * @return the vertex value
+	 */
+	public final V getVertexValue() {
+		return vertexValue;
+	}
 
-    /**
-     * Set the vertex value
-     * 
-     * @param vertexValue
-     */
-    public final void setVertexValue(V vertexValue) {
-        this.vertexValue = vertexValue;
-        this.updated = true;
-    }
+	/**
+	 * Set the vertex value
+	 * 
+	 * @param vertexValue
+	 */
+	public final void setVertexValue(V vertexValue) {
+		this.vertexValue = vertexValue;
+		this.updated = true;
+	}
 
-    /***
-     * Send a message to a specific vertex
-     * 
-     * @param id
-     *            the receiver vertex id
-     * @param msg
-     *            the message
-     */
-    public final void sendMsg(I id, M msg) {
-        if (msg == null) {
-            throw new IllegalArgumentException("sendMsg: Cannot send null message to " + id);
-        }
-        delegate.sendMsg(id, msg);
-        this.hasMessage = true;
-    }
+	/***
+	 * Send a message to a specific vertex
+	 * 
+	 * @param id
+	 *            the receiver vertex id
+	 * @param msg
+	 *            the message
+	 */
+	public final void sendMsg(I id, M msg) {
+		if (msg == null) {
+			throw new IllegalArgumentException(
+					"sendMsg: Cannot send null message to " + id);
+		}
+		delegate.sendMsg(id, msg);
+		this.hasMessage = true;
+	}
 
-    /**
-     * Send a message to all direct outgoing neighbors
-     * 
-     * @param msg
-     *            the message
-     */
-    public final void sendMsgToAllEdges(M msg) {
-        if (msg == null) {
-            throw new IllegalArgumentException("sendMsgToAllEdges: Cannot send null message to all edges");
-        }
-        for (Edge<I, E> edge : destEdgeList) {
-            sendMsg(edge.getDestVertexId(), msg);
-        }
-    }
+	/**
+	 * Send a message to all direct outgoing neighbors
+	 * 
+	 * @param msg
+	 *            the message
+	 */
+	public final void sendMsgToAllEdges(M msg) {
+		if (msg == null) {
+			throw new IllegalArgumentException(
+					"sendMsgToAllEdges: Cannot send null message to all edges");
+		}
+		for (Edge<I, E> edge : destEdgeList) {
+			sendMsg(edge.getDestVertexId(), msg);
+		}
+	}
 
-    /**
-     * Vote to halt. Once all vertex vote to halt and no more messages, a
-     * Pregelix job will terminate.
-     */
-    public final void voteToHalt() {
-        halt = true;
-    }
+	/**
+	 * Vote to halt. Once all vertex vote to halt and no more messages, a
+	 * Pregelix job will terminate.
+	 */
+	public final void voteToHalt() {
+		halt = true;
+		updated = true;
+	}
 
-    /**
-     * @return the vertex is halted (true) or not (false)
-     */
-    public final boolean isHalted() {
-        return halt;
-    }
+	/**
+	 * @return the vertex is halted (true) or not (false)
+	 */
+	public final boolean isHalted() {
+		return halt;
+	}
 
-    @Override
-    final public void readFields(DataInput in) throws IOException {
-        reset();
-        if (vertexId == null)
-            vertexId = BspUtils.<I> createVertexIndex(getContext().getConfiguration());
-        vertexId.readFields(in);
-        delegate.setVertexId(vertexId);
-        boolean hasVertexValue = in.readBoolean();
+	@Override
+	final public void readFields(DataInput in) throws IOException {
+		reset();
+		if (vertexId == null)
+			vertexId = BspUtils.<I> createVertexIndex(getContext()
+					.getConfiguration());
+		vertexId.readFields(in);
+		delegate.setVertexId(vertexId);
+		boolean hasVertexValue = in.readBoolean();
 
-        if (hasVertexValue) {
-            vertexValue = allocateValue();
-            vertexValue.readFields(in);
-            delegate.setVertex(this);
-        }
-        destEdgeList.clear();
-        long edgeMapSize = SerDeUtils.readVLong(in);
-        for (long i = 0; i < edgeMapSize; ++i) {
-            Edge<I, E> edge = allocateEdge();
-            edge.setConf(getContext().getConfiguration());
-            edge.readFields(in);
-            addEdge(edge);
-        }
-        msgList.clear();
-        long msgListSize = SerDeUtils.readVLong(in);
-        for (long i = 0; i < msgListSize; ++i) {
-            M msg = allocateMessage();
-            msg.readFields(in);
-            msgList.add(msg);
-        }
-        halt = in.readBoolean();
-        updated = false;
-        hasMessage = false;
-        createdNewLiveVertex = false;
-    }
+		if (hasVertexValue) {
+			vertexValue = allocateValue();
+			vertexValue.readFields(in);
+			delegate.setVertex(this);
+		}
+		destEdgeList.clear();
+		long edgeMapSize = SerDeUtils.readVLong(in);
+		for (long i = 0; i < edgeMapSize; ++i) {
+			Edge<I, E> edge = allocateEdge();
+			edge.setConf(getContext().getConfiguration());
+			edge.readFields(in);
+			addEdge(edge);
+		}
+		msgList.clear();
+		long msgListSize = SerDeUtils.readVLong(in);
+		for (long i = 0; i < msgListSize; ++i) {
+			M msg = allocateMessage();
+			msg.readFields(in);
+			msgList.add(msg);
+		}
+		halt = in.readBoolean();
+		updated = false;
+		hasMessage = false;
+		createdNewLiveVertex = false;
+	}
 
-    @Override
-    public void write(DataOutput out) throws IOException {
-        vertexId.write(out);
-        out.writeBoolean(vertexValue != null);
-        if (vertexValue != null) {
-            vertexValue.write(out);
-        }
-        SerDeUtils.writeVLong(out, destEdgeList.size());
-        for (Edge<I, E> edge : destEdgeList) {
-            edge.write(out);
-        }
-        SerDeUtils.writeVLong(out, msgList.size());
-        for (M msg : msgList) {
-            msg.write(out);
-        }
-        out.writeBoolean(halt);
-    }
+	@Override
+	public void write(DataOutput out) throws IOException {
+		vertexId.write(out);
+		out.writeBoolean(vertexValue != null);
+		if (vertexValue != null) {
+			vertexValue.write(out);
+		}
+		SerDeUtils.writeVLong(out, destEdgeList.size());
+		for (Edge<I, E> edge : destEdgeList) {
+			edge.write(out);
+		}
+		SerDeUtils.writeVLong(out, msgList.size());
+		for (M msg : msgList) {
+			msg.write(out);
+		}
+		out.writeBoolean(halt);
+	}
 
-    /**
-     * Get the list of incoming messages
-     * 
-     * @return the list of messages
-     */
-    public List<M> getMsgList() {
-        return msgList;
-    }
+	/**
+	 * Get the list of incoming messages
+	 * 
+	 * @return the list of messages
+	 */
+	public List<M> getMsgList() {
+		return msgList;
+	}
 
-    /**
-     * Get outgoing edge list
-     * 
-     * @return a list of outgoing edges
-     */
-    public List<Edge<I, E>> getEdges() {
-        return this.destEdgeList;
-    }
+	/**
+	 * Get outgoing edge list
+	 * 
+	 * @return a list of outgoing edges
+	 */
+	public List<Edge<I, E>> getEdges() {
+		return this.destEdgeList;
+	}
 
-    @Override
-    @SuppressWarnings("unchecked")
-    public String toString() {
-        Collections.sort(destEdgeList);
-        StringBuffer edgeBuffer = new StringBuffer();
-        edgeBuffer.append("(");
-        for (Edge<I, E> edge : destEdgeList) {
-            edgeBuffer.append(edge.getDestVertexId()).append(",");
-        }
-        edgeBuffer.append(")");
-        return "Vertex(id=" + getVertexId() + ",value=" + getVertexValue() + ", edges=" + edgeBuffer + ")";
-    }
+	@Override
+	@SuppressWarnings("unchecked")
+	public String toString() {
+		Collections.sort(destEdgeList);
+		StringBuffer edgeBuffer = new StringBuffer();
+		edgeBuffer.append("(");
+		for (Edge<I, E> edge : destEdgeList) {
+			edgeBuffer.append(edge.getDestVertexId()).append(",");
+		}
+		edgeBuffer.append(")");
+		return "Vertex(id=" + getVertexId() + ",value=" + getVertexValue()
+				+ ", edges=" + edgeBuffer + ")";
+	}
 
-    /**
-     * Get the number of outgoing edges
-     * 
-     * @return the number of outging edges
-     */
-    public int getNumOutEdges() {
-        return destEdgeList.size();
-    }
+	/**
+	 * Get the number of outgoing edges
+	 * 
+	 * @return the number of outging edges
+	 */
+	public int getNumOutEdges() {
+		return destEdgeList.size();
+	}
 
-    /**
-     * Pregelix internal use only
-     * 
-     * @param writers
-     */
-    public void setOutputWriters(List<IFrameWriter> writers) {
-        delegate.setOutputWriters(writers);
-    }
+	/**
+	 * Pregelix internal use only
+	 * 
+	 * @param writers
+	 */
+	public void setOutputWriters(List<IFrameWriter> writers) {
+		delegate.setOutputWriters(writers);
+	}
 
-    /**
-     * Pregelix internal use only
-     * 
-     * @param writers
-     */
-    public void setOutputAppenders(List<FrameTupleAppender> appenders) {
-        delegate.setOutputAppenders(appenders);
-    }
+	/**
+	 * Pregelix internal use only
+	 * 
+	 * @param writers
+	 */
+	public void setOutputAppenders(List<FrameTupleAppender> appenders) {
+		delegate.setOutputAppenders(appenders);
+	}
 
-    /**
-     * Pregelix internal use only
-     * 
-     * @param writers
-     */
-    public void setOutputTupleBuilders(List<ArrayTupleBuilder> tbs) {
-        delegate.setOutputTupleBuilders(tbs);
-    }
+	/**
+	 * Pregelix internal use only
+	 * 
+	 * @param writers
+	 */
+	public void setOutputTupleBuilders(List<ArrayTupleBuilder> tbs) {
+		delegate.setOutputTupleBuilders(tbs);
+	}
 
-    /**
-     * Pregelix internal use only
-     * 
-     * @param writers
-     */
-    public void finishCompute() throws IOException {
-        delegate.finishCompute();
-    }
+	/**
+	 * Pregelix internal use only
+	 * 
+	 * @param writers
+	 */
+	public void finishCompute() throws IOException {
+		delegate.finishCompute();
+	}
 
-    /**
-     * Pregelix internal use only
-     */
-    public boolean hasUpdate() {
-        return this.updated;
-    }
+	/**
+	 * Pregelix internal use only
+	 */
+	public boolean hasUpdate() {
+		return this.updated;
+	}
 
-    /**
-     * Pregelix internal use only
-     */
-    public boolean hasMessage() {
-        return this.hasMessage;
-    }
+	/**
+	 * Pregelix internal use only
+	 */
+	public boolean hasMessage() {
+		return this.hasMessage;
+	}
 
-    /**
-     * Pregelix internal use only
-     */
-    public boolean createdNewLiveVertex() {
-        return this.createdNewLiveVertex;
-    }
+	/**
+	 * Pregelix internal use only
+	 */
+	public boolean createdNewLiveVertex() {
+		return this.createdNewLiveVertex;
+	}
 
-    /**
-     * sort the edges
-     */
-    @SuppressWarnings("unchecked")
-    public void sortEdges() {
-        Collections.sort(destEdgeList);
-    }
+	/**
+	 * sort the edges
+	 */
+	@SuppressWarnings("unchecked")
+	public void sortEdges() {
+		updated = true;
+		Collections.sort(destEdgeList);
+	}
 
-    /**
-     * Allocate a new edge from the edge pool
-     */
-    private Edge<I, E> allocateEdge() {
-        Edge<I, E> edge;
-        if (usedEdge < edgePool.size()) {
-            edge = edgePool.get(usedEdge);
-            usedEdge++;
-        } else {
-            edge = new Edge<I, E>();
-            edgePool.add(edge);
-            usedEdge++;
-        }
-        return edge;
-    }
+	/**
+	 * Allocate a new edge from the edge pool
+	 */
+	private Edge<I, E> allocateEdge() {
+		Edge<I, E> edge;
+		if (usedEdge < edgePool.size()) {
+			edge = edgePool.get(usedEdge);
+			usedEdge++;
+		} else {
+			edge = new Edge<I, E>();
+			edgePool.add(edge);
+			usedEdge++;
+		}
+		return edge;
+	}
 
-    /**
-     * Allocate a new message from the message pool
-     */
-    private M allocateMessage() {
-        M message;
-        if (usedMessage < msgPool.size()) {
-            message = msgPool.get(usedEdge);
-            usedMessage++;
-        } else {
-            message = BspUtils.<M> createMessageValue(getContext().getConfiguration());
-            msgPool.add(message);
-            usedMessage++;
-        }
-        return message;
-    }
+	/**
+	 * Allocate a new message from the message pool
+	 */
+	private M allocateMessage() {
+		M message;
+		if (usedMessage < msgPool.size()) {
+			message = msgPool.get(usedEdge);
+			usedMessage++;
+		} else {
+			message = BspUtils.<M> createMessageValue(getContext()
+					.getConfiguration());
+			msgPool.add(message);
+			usedMessage++;
+		}
+		return message;
+	}
 
-    /**
-     * Set the global superstep for all the vertices (internal use)
-     * 
-     * @param superstep
-     *            New superstep
-     */
-    public static final void setSuperstep(long superstep) {
-        Vertex.superstep = superstep;
-    }
+	/**
+	 * Set the global superstep for all the vertices (internal use)
+	 * 
+	 * @param superstep
+	 *            New superstep
+	 */
+	public static final void setSuperstep(long superstep) {
+		Vertex.superstep = superstep;
+	}
 
-    /**
-     * Add an outgoing edge into the vertex
-     * 
-     * @param edge
-     *            the edge to be added
-     * @return true if the edge list changed as a result of this call
-     */
-    public boolean addEdge(Edge<I, E> edge) {
-        edge.setConf(getContext().getConfiguration());
-        return destEdgeList.add(edge);
-    }
+	/**
+	 * Add an outgoing edge into the vertex
+	 * 
+	 * @param edge
+	 *            the edge to be added
+	 * @return true if the edge list changed as a result of this call
+	 */
+	public boolean addEdge(Edge<I, E> edge) {
+		edge.setConf(getContext().getConfiguration());
+		updated = true;
+		return destEdgeList.add(edge);
+	}
 
-    /**
-     * remove an outgoing edge in the graph
-     * 
-     * @param edge
-     *            the edge to be removed
-     * @return true if the edge is in the edge list of the vertex
-     */
-    public boolean removeEdge(Edge<I, E> edge) {
-        return destEdgeList.remove(edge);
-    }
+	/**
+	 * remove an outgoing edge in the graph
+	 * 
+	 * @param edge
+	 *            the edge to be removed
+	 * @return true if the edge is in the edge list of the vertex
+	 */
+	public boolean removeEdge(Edge<I, E> edge) {
+		updated = true;
+		return destEdgeList.remove(edge);
+	}
 
-    /**
-     * Add a new vertex into the graph
-     * 
-     * @param vertexId
-     *            the vertex id
-     * @param vertex
-     *            the vertex
-     */
-    public final void addVertex(I vertexId, Vertex vertex) {
-        createdNewLiveVertex |= !vertex.isHalted();
-        delegate.addVertex(vertexId, vertex);
-    }
+	/**
+	 * Add a new vertex into the graph
+	 * 
+	 * @param vertexId
+	 *            the vertex id
+	 * @param vertex
+	 *            the vertex
+	 */
+	public final void addVertex(I vertexId, Vertex vertex) {
+		createdNewLiveVertex |= !vertex.isHalted();
+		delegate.addVertex(vertexId, vertex);
+	}
 
-    /**
-     * Delete a vertex from id
-     * 
-     * @param vertexId
-     *            the vertex id
-     */
-    public final void deleteVertex(I vertexId) {
-        delegate.deleteVertex(vertexId);
-    }
+	/**
+	 * Delete a vertex from id
+	 * 
+	 * @param vertexId
+	 *            the vertex id
+	 */
+	public final void deleteVertex(I vertexId) {
+		delegate.deleteVertex(vertexId);
+	}
 
-    /**
-     * Allocate a vertex value from the object pool
-     * 
-     * @return a vertex value instance
-     */
-    private V allocateValue() {
-        V value;
-        if (usedValue < valuePool.size()) {
-            value = valuePool.get(usedValue);
-            usedValue++;
-        } else {
-            value = BspUtils.<V> createVertexValue(getContext().getConfiguration());
-            valuePool.add(value);
-            usedValue++;
-        }
-        return value;
-    }
+	public void activate() {
+		if (halt)
+			this.updated = true;
+		this.halt = false;
+	}
 
-    /**
-     * Get the current global superstep number
-     * 
-     * @return the current superstep number
-     */
-    public static final long getSuperstep() {
-        return superstep;
-    }
+	/**
+	 * Allocate a vertex value from the object pool
+	 * 
+	 * @return a vertex value instance
+	 */
+	private V allocateValue() {
+		V value;
+		if (usedValue < valuePool.size()) {
+			value = valuePool.get(usedValue);
+			usedValue++;
+		} else {
+			value = BspUtils.<V> createVertexValue(getContext()
+					.getConfiguration());
+			valuePool.add(value);
+			usedValue++;
+		}
+		return value;
+	}
 
-    /**
-     * Set the total number of vertices from the last superstep.
-     * 
-     * @param numVertices
-     *            Aggregate vertices in the last superstep
-     */
-    public static final void setNumVertices(long numVertices) {
-        Vertex.numVertices = numVertices;
-    }
+	/**
+	 * Get the current global superstep number
+	 * 
+	 * @return the current superstep number
+	 */
+	public static final long getSuperstep() {
+		return superstep;
+	}
 
-    /**
-     * Get the number of vertexes in the graph
-     * 
-     * @return the number of vertexes in the graph
-     */
-    public static final long getNumVertices() {
-        return numVertices;
-    }
+	/**
+	 * Set the total number of vertices from the last superstep.
+	 * 
+	 * @param numVertices
+	 *            Aggregate vertices in the last superstep
+	 */
+	public static final void setNumVertices(long numVertices) {
+		Vertex.numVertices = numVertices;
+	}
 
-    /**
-     * Set the total number of edges from the last superstep.
-     * 
-     * @param numEdges
-     *            Aggregate edges in the last superstep
-     */
-    public static void setNumEdges(long numEdges) {
-        Vertex.numEdges = numEdges;
-    }
+	/**
+	 * Get the number of vertexes in the graph
+	 * 
+	 * @return the number of vertexes in the graph
+	 */
+	public static final long getNumVertices() {
+		return numVertices;
+	}
 
-    /**
-     * Get the number of edges from this graph
-     * 
-     * @return the number of edges in the graph
-     */
-    public static final long getNumEdges() {
-        return numEdges;
-    }
+	/**
+	 * Set the total number of edges from the last superstep.
+	 * 
+	 * @param numEdges
+	 *            Aggregate edges in the last superstep
+	 */
+	public static void setNumEdges(long numEdges) {
+		Vertex.numEdges = numEdges;
+	}
 
-    /**
-     * Pregelix internal use only
-     */
-    public static final TaskAttemptContext getContext() {
-        return context;
-    }
+	/**
+	 * Get the number of edges from this graph
+	 * 
+	 * @return the number of edges in the graph
+	 */
+	public static final long getNumEdges() {
+		return numEdges;
+	}
 
-    /**
-     * Pregelix internal use only
-     * 
-     * @param context
-     */
-    public static final void setContext(TaskAttemptContext context) {
-        Vertex.context = context;
-    }
+	/**
+	 * Pregelix internal use only
+	 */
+	public static final TaskAttemptContext getContext() {
+		return context;
+	}
+
+	/**
+	 * Pregelix internal use only
+	 * 
+	 * @param context
+	 */
+	public static final void setContext(TaskAttemptContext context) {
+		Vertex.context = context;
+	}
 
 }
diff --git a/pregelix/pregelix-core/pom.xml b/pregelix/pregelix-core/pom.xml
index 5238068..576758b 100644
--- a/pregelix/pregelix-core/pom.xml
+++ b/pregelix/pregelix-core/pom.xml
@@ -1,5 +1,4 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>pregelix-core</artifactId>
 	<packaging>jar</packaging>
@@ -8,7 +7,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 
@@ -195,84 +194,84 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-api</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow-std</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-runtime</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-common</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-btree</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -286,7 +285,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks.examples</groupId>
 			<artifactId>hyracks-integration-tests</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
@@ -306,7 +305,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-ipc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java
index f07a246..3a4c41b 100644
--- a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java
+++ b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java
@@ -75,11 +75,17 @@
         try {
             /** add hadoop configurations */
             URL hadoopCore = job.getClass().getClassLoader().getResource("core-site.xml");
-            job.getConfiguration().addResource(hadoopCore);
+            if (hadoopCore != null) {
+                job.getConfiguration().addResource(hadoopCore);
+            }
             URL hadoopMapRed = job.getClass().getClassLoader().getResource("mapred-site.xml");
-            job.getConfiguration().addResource(hadoopMapRed);
+            if (hadoopMapRed != null) {
+                job.getConfiguration().addResource(hadoopMapRed);
+            }
             URL hadoopHdfs = job.getClass().getClassLoader().getResource("hdfs-site.xml");
-            job.getConfiguration().addResource(hadoopHdfs);
+            if (hadoopHdfs != null) {
+                job.getConfiguration().addResource(hadoopHdfs);
+            }
             ClusterConfig.loadClusterConfig(ipAddress, port);
 
             LOG.info("job started");
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 2a2e2bf..cd2a864 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
@@ -14,6 +14,7 @@
  */
 package edu.uci.ics.pregelix.core.util;
 
+import java.io.File;
 import java.util.EnumSet;
 
 import edu.uci.ics.hyracks.api.client.HyracksConnection;
@@ -44,7 +45,7 @@
     private static NodeControllerService nc2;
     private static IHyracksClientConnection hcc;
 
-    public static void init() throws Exception {
+    public static void init(String topologyFilePath) throws Exception {
         CCConfig ccConfig = new CCConfig();
         ccConfig.clientNetIpAddress = CC_HOST;
         ccConfig.clusterNetIpAddress = CC_HOST;
@@ -53,6 +54,7 @@
         ccConfig.defaultMaxJobAttempts = 0;
         ccConfig.jobHistorySize = 0;
         ccConfig.profileDumpPeriod = -1;
+        ccConfig.clusterTopologyDefinition = new File(topologyFilePath);
 
         // cluster controller
         cc = new ClusterControllerService(ccConfig);
@@ -64,6 +66,7 @@
         ncConfig1.clusterNetIPAddress = "localhost";
         ncConfig1.ccPort = TEST_HYRACKS_CC_PORT;
         ncConfig1.dataIPAddress = "127.0.0.1";
+        ncConfig1.datasetIPAddress = "127.0.0.1";
         ncConfig1.nodeId = NC1_ID;
         nc1 = new NodeControllerService(ncConfig1);
         nc1.start();
@@ -73,6 +76,7 @@
         ncConfig2.clusterNetIPAddress = "localhost";
         ncConfig2.ccPort = TEST_HYRACKS_CC_PORT;
         ncConfig2.dataIPAddress = "127.0.0.1";
+        ncConfig2.datasetIPAddress = "127.0.0.1";
         ncConfig2.nodeId = NC2_ID;
         nc2 = new NodeControllerService(ncConfig2);
         nc2.start();
diff --git a/pregelix/pregelix-core/src/main/resources/conf/topology-template.xml b/pregelix/pregelix-core/src/main/resources/conf/topology-template.xml
new file mode 100755
index 0000000..4710706
--- /dev/null
+++ b/pregelix/pregelix-core/src/main/resources/conf/topology-template.xml
@@ -0,0 +1,7 @@
+<cluster-topology>
+    <network-switch name="Global">
+        <network-switch name="local">
+            <terminal name="127.0.0.1"/>
+        </network-switch>
+    </network-switch>
+</cluster-topology>
\ No newline at end of file
diff --git a/pregelix/pregelix-core/src/main/resources/scripts/getip.sh b/pregelix/pregelix-core/src/main/resources/scripts/getip.sh
index e0cdf73..a691c0f 100755
--- a/pregelix/pregelix-core/src/main/resources/scripts/getip.sh
+++ b/pregelix/pregelix-core/src/main/resources/scripts/getip.sh
@@ -6,6 +6,10 @@
 then
         #Get IP Address
         IPADDR=`/sbin/ifconfig eth0 | grep "inet " | awk '{print $2}' | cut -f 2 -d ':'`
+    	if [ "$IPADDR" = "" ]
+        then
+		IPADDR=`/sbin/ifconfig em1 | grep "inet " | awk '{print $2}' | cut -f 2 -d ':'`
+        fi 
 	if [ "$IPADDR" = "" ]
         then
 		IPADDR=`/sbin/ifconfig lo | grep "inet " | awk '{print $2}' | cut -f 2 -d ':'`
diff --git a/pregelix/pregelix-core/src/main/resources/scripts/pregelix b/pregelix/pregelix-core/src/main/resources/scripts/pregelix
index 6997078..b1a2f74 100644
--- a/pregelix/pregelix-core/src/main/resources/scripts/pregelix
+++ b/pregelix/pregelix-core/src/main/resources/scripts/pregelix
@@ -91,7 +91,7 @@
   REPO="$BASEDIR"/lib
 fi
 
-CLASSPATH=$CLASSPATH_PREFIX:"$HADOOP_HOME"/conf:"$BASEDIR"/etc:$1
+CLASSPATH=$CLASSPATH_PREFIX:"$HADOOP_HOME"/conf:/etc/hadoop/conf:"$BASEDIR"/etc:$1
 
 # For Cygwin, switch paths to Windows format before running java
 if $cygwin; then
diff --git a/pregelix/pregelix-core/src/main/resources/scripts/startcc.sh b/pregelix/pregelix-core/src/main/resources/scripts/startcc.sh
index fe2551d..133b604 100644
--- a/pregelix/pregelix-core/src/main/resources/scripts/startcc.sh
+++ b/pregelix/pregelix-core/src/main/resources/scripts/startcc.sh
@@ -20,6 +20,12 @@
 export JAVA_HOME=$JAVA_HOME
 export JAVA_OPTS=$CCJAVA_OPTS
 
-#Launch hyracks cc script
+
 chmod -R 755 $HYRACKS_HOME
-$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyrackscc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 3 &> $CCLOGS_DIR/cc.log &
+if [ -f "conf/topology.xml"  ]; then
+#Launch hyracks cc script with topology
+$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyrackscc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 0 -cluster-topology "conf/topology.xml" &> $CCLOGS_DIR/cc.log &
+else
+#Launch hyracks cc script without toplogy
+$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyrackscc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 0 &> $CCLOGS_DIR/cc.log &
+fi
diff --git a/pregelix/pregelix-core/src/main/resources/scripts/startnc.sh b/pregelix/pregelix-core/src/main/resources/scripts/startnc.sh
index 6e0f90e..b059aad 100644
--- a/pregelix/pregelix-core/src/main/resources/scripts/startnc.sh
+++ b/pregelix/pregelix-core/src/main/resources/scripts/startnc.sh
@@ -46,4 +46,4 @@
 cd $NCTMP_DIR
 
 #Launch hyracks nc
-$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyracksnc -cc-host $CCHOST -cc-port $CC_CLUSTERPORT -cluster-net-ip-address $IPADDR  -data-ip-address $IPADDR -node-id $NODEID -iodevices "${IO_DIRS}" &> $NCLOGS_DIR/$NODEID.log &
+$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyracksnc -cc-host $CCHOST -cc-port $CC_CLUSTERPORT -cluster-net-ip-address $IPADDR  -data-ip-address $IPADDR -result-ip-address $IPADDR  -node-id $NODEID -iodevices "${IO_DIRS}" &> $NCLOGS_DIR/$NODEID.log &
diff --git a/pregelix/pregelix-core/src/main/resources/scripts/stopnc.sh b/pregelix/pregelix-core/src/main/resources/scripts/stopnc.sh
index 03ce4e7..35c4794 100644
--- a/pregelix/pregelix-core/src/main/resources/scripts/stopnc.sh
+++ b/pregelix/pregelix-core/src/main/resources/scripts/stopnc.sh
@@ -5,6 +5,10 @@
 PID=`ps -ef|grep ${USER}|grep java|grep 'Dapp.name=hyracksnc'|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=hyracksnc'|awk '{print $2}'`
 fi
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 97659d4..f7cadf6 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
@@ -102,7 +102,7 @@
         ClusterConfig.setStorePath(PATH_TO_CLUSTER_STORE);
         ClusterConfig.setClusterPropertiesPath(PATH_TO_CLUSTER_PROPERTIES);
         cleanupStores();
-        PregelixHyracksIntegrationUtil.init();
+        PregelixHyracksIntegrationUtil.init("src/test/resources/topology.xml");
         PregelixHyracksIntegrationUtil.createApp(HYRACKS_APP_NAME);
 
         FileUtils.forceMkdir(new File(EXPECT_RESULT_DIR));
diff --git a/pregelix/pregelix-core/src/test/resources/topology.xml b/pregelix/pregelix-core/src/test/resources/topology.xml
new file mode 100755
index 0000000..4710706
--- /dev/null
+++ b/pregelix/pregelix-core/src/test/resources/topology.xml
@@ -0,0 +1,7 @@
+<cluster-topology>
+    <network-switch name="Global">
+        <network-switch name="local">
+            <terminal name="127.0.0.1"/>
+        </network-switch>
+    </network-switch>
+</cluster-topology>
\ No newline at end of file
diff --git a/pregelix/pregelix-dataflow-std-base/pom.xml b/pregelix/pregelix-dataflow-std-base/pom.xml
index caa3222..eeaa6c9 100644
--- a/pregelix/pregelix-dataflow-std-base/pom.xml
+++ b/pregelix/pregelix-dataflow-std-base/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
     		<groupId>edu.uci.ics.hyracks</groupId>
     		<artifactId>pregelix</artifactId>
-    		<version>0.2.3-SNAPSHOT</version>
+    		<version>0.2.4-SNAPSHOT</version>
   	</parent>
 
 
@@ -73,14 +73,14 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-api</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/pregelix/pregelix-dataflow-std/pom.xml b/pregelix/pregelix-dataflow-std/pom.xml
index c5a0913..889c876 100644
--- a/pregelix/pregelix-dataflow-std/pom.xml
+++ b/pregelix/pregelix-dataflow-std/pom.xml
@@ -1,5 +1,4 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>pregelix-dataflow-std</artifactId>
 	<packaging>jar</packaging>
@@ -8,7 +7,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 
@@ -74,77 +73,77 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow-std-base</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-hdfs-core</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-common</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-btree</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-ipc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/pregelix/pregelix-dataflow/pom.xml b/pregelix/pregelix-dataflow/pom.xml
index d3f396e..ffc000b 100644
--- a/pregelix/pregelix-dataflow/pom.xml
+++ b/pregelix/pregelix-dataflow/pom.xml
@@ -1,5 +1,4 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>pregelix-dataflow</artifactId>
 	<packaging>jar</packaging>
@@ -8,7 +7,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 
@@ -74,68 +73,68 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-api</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow-std-base</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-common</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-btree</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-ipc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/pregelix/pregelix-dist/pom.xml b/pregelix/pregelix-dist/pom.xml
index 847e843..e9aef12 100644
--- a/pregelix/pregelix-dist/pom.xml
+++ b/pregelix/pregelix-dist/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 	<artifactId>pregelix-dist</artifactId>
 	<name>pregelix-dist</name>
@@ -69,13 +69,13 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-core</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-example</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 		</dependency>
 	</dependencies>
 </project>
diff --git a/pregelix/pregelix-example/pom.xml b/pregelix/pregelix-example/pom.xml
index e643331..beefee2 100644
--- a/pregelix/pregelix-example/pom.xml
+++ b/pregelix/pregelix-example/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<groupId>edu.uci.ics.hyracks</groupId>
 		<artifactId>pregelix</artifactId>
-		<version>0.2.3-SNAPSHOT</version>
+		<version>0.2.4-SNAPSHOT</version>
 	</parent>
 
 	<build>
@@ -104,7 +104,7 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-core</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/dataload/DataLoadTest.java b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/dataload/DataLoadTest.java
index 37f03a5..321b5b2 100644
--- a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/dataload/DataLoadTest.java
+++ b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/dataload/DataLoadTest.java
@@ -76,7 +76,7 @@
         ClusterConfig.setStorePath(PATH_TO_CLUSTER_STORE);
         ClusterConfig.setClusterPropertiesPath(PATH_TO_CLUSTER_PROPERTIES);
         cleanupStores();
-        PregelixHyracksIntegrationUtil.init();
+        PregelixHyracksIntegrationUtil.init("src/test/resources/topology.xml");
         PregelixHyracksIntegrationUtil.createApp(HYRACKS_APP_NAME);
         LOGGER.info("Hyracks mini-cluster started");
         startHDFS();
diff --git a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestSuite.java b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestSuite.java
index 79a5c3c..fa98ebd 100644
--- a/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestSuite.java
+++ b/pregelix/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestSuite.java
@@ -75,7 +75,7 @@
 		ClusterConfig.setStorePath(PATH_TO_CLUSTER_STORE);
 		ClusterConfig.setClusterPropertiesPath(PATH_TO_CLUSTER_PROPERTIES);
 		cleanupStores();
-		PregelixHyracksIntegrationUtil.init();
+		PregelixHyracksIntegrationUtil.init("src/test/resources/topology.xml");
 		PregelixHyracksIntegrationUtil.createApp(HYRACKS_APP_NAME);
 		LOGGER.info("Hyracks mini-cluster started");
 		FileUtils.forceMkdir(new File(ACTUAL_RESULT_DIR));
diff --git a/pregelix/pregelix-example/src/test/resources/topology.xml b/pregelix/pregelix-example/src/test/resources/topology.xml
new file mode 100755
index 0000000..2a6c380
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/topology.xml
@@ -0,0 +1,7 @@
+<cluster-topology>
+    <network-switch name="Global">
+        <network-switch name="local">
+            <terminal name="127.1.0.1"/>
+        </network-switch>
+    </network-switch>
+</cluster-topology>
\ No newline at end of file
diff --git a/pregelix/pregelix-runtime/pom.xml b/pregelix/pregelix-runtime/pom.xml
index e75f98b..bce7b12 100644
--- a/pregelix/pregelix-runtime/pom.xml
+++ b/pregelix/pregelix-runtime/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
     		<groupId>edu.uci.ics.hyracks</groupId>
     		<artifactId>pregelix</artifactId>
-    		<version>0.2.3-SNAPSHOT</version>
+    		<version>0.2.4-SNAPSHOT</version>
   	</parent>
 
 
@@ -73,82 +73,82 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-api</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow-std</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>pregelix-dataflow</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-std</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-api</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-dataflow-common</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-data-std</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-common</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-btree</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-cc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-control-nc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-ipc</artifactId>
-			<version>0.2.3-SNAPSHOT</version>
+			<version>0.2.4-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
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 f7958d9..e3c5a48 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
@@ -179,6 +179,7 @@
                     return;
 
                 try {
+                	vertex.activate();
                     vertex.compute(msgIterator);
                     vertex.finishCompute();
                 } catch (IOException e) {