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/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/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-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/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/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/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 802777c..b258221 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
@@ -143,6 +143,7 @@
             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-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/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/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-client/pom.xml b/hyracks/hyracks-client/pom.xml
new file mode 100644
index 0000000..854a009
--- /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>0.2.3-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>0.2.3-SNAPSHOT</version>
+ </dependency>
+ <dependency>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks-net</artifactId>
+    <version>0.2.3-SNAPSHOT</version>
+ </dependency>
+ <dependency>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks-comm</artifactId>
+    <version>0.2.3-SNAPSHOT</version>
+ </dependency>
+  <dependency>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks-dataflow-common</artifactId>
+    <version>0.2.3-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..c3583699
--- /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>0.2.3-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>0.2.3-SNAPSHOT</version>
+ </dependency>
+  <dependency>
+    <groupId>edu.uci.ics.hyracks</groupId>
+    <artifactId>hyracks-net</artifactId>
+    <version>0.2.3-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/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..3fc46ff 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'];
@@ -117,9 +121,13 @@
             }
             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(etSignalingBytesWritten, rrdPtr) ]);
                 ipcMessageSendRateArray.push([ i, computeRate(ipcMessagesSent, rrdPtr) ]);
                 ipcMessageBytesSendRateArray.push([ i, computeRate(ipcMessageBytesSent, rrdPtr) ]);
                 ipcMessageReceiveRateArray.push([ i, computeRate(ipcMessagesReceived, rrdPtr) ]);
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..c44cec9 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/pom.xml
+++ b/hyracks/hyracks-control/hyracks-control-nc/pom.xml
@@ -41,6 +41,11 @@
   		<artifactId>hyracks-net</artifactId>
   		<version>0.2.3-SNAPSHOT</version>
   	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-comm</artifactId>
+  		<version>0.2.3-SNAPSHOT</version>
+  	</dependency>
   </dependencies>
   <reporting>
     <plugins>
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-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-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-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-examples/hyracks-integration-tests/pom.xml b/hyracks/hyracks-examples/hyracks-integration-tests/pom.xml
index 1daf1f7..5e7b5c9 100644
--- a/hyracks/hyracks-examples/hyracks-integration-tests/pom.xml
+++ b/hyracks/hyracks-examples/hyracks-integration-tests/pom.xml
@@ -32,6 +32,13 @@
   		<scope>test</scope>
   	</dependency>
   	<dependency>
+        <groupId>edu.uci.ics.hyracks</groupId>
+        <artifactId>hyracks-client</artifactId>
+        <version>0.2.3-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>
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-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 cc1a299..e42e8a6 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
@@ -41,17 +41,23 @@
     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" });
@@ -79,17 +85,23 @@
     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)));
 
         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" });
@@ -124,17 +136,23 @@
     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" });
@@ -169,17 +187,23 @@
     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" });
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 2fbeb7c..b5d9d1a 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" }));
@@ -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" }));
@@ -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" }));
@@ -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" }));
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-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-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/pom.xml b/hyracks/pom.xml
index 09925fb..b699542 100644
--- a/hyracks/pom.xml
+++ b/hyracks/pom.xml
@@ -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/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..c343763 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
@@ -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();