diff --git a/hyracks/hyracks-control/hyracks-control-nc/pom.xml b/hyracks/hyracks-control/hyracks-control-nc/pom.xml
index f103f4a..9ecc083 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/pom.xml
+++ b/hyracks/hyracks-control/hyracks-control-nc/pom.xml
@@ -15,8 +15,8 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>2.0.2</version>
         <configuration>
-          <source>1.7</source>
-          <target>1.7</target>
+          <source>1.6</source>
+          <target>1.6</target>
         </configuration>
       </plugin>
     </plugins>
@@ -40,11 +40,6 @@
   		<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 290c59c..0195143 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
@@ -45,7 +45,6 @@
 
 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;
@@ -62,9 +61,7 @@
 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;
@@ -97,10 +94,6 @@
 
     private final NetworkManager netManager;
 
-    private final IDatasetPartitionManager datasetPartitionManager;
-
-    private final DatasetNetworkManager datasetNetworkManager;
-
     private final WorkQueue queue;
 
     private final Timer timer;
@@ -147,11 +140,7 @@
             throw new Exception("id not set");
         }
         partitionManager = new PartitionManager(this);
-        netManager = new NetworkManager(getIpAddress(ncConfig.dataIPAddress), partitionManager, ncConfig.nNetThreads);
-
-        datasetPartitionManager = new DatasetPartitionManager(this, executor);
-        datasetNetworkManager = new DatasetNetworkManager(getIpAddress(ncConfig.datasetIPAddress),
-                datasetPartitionManager, ncConfig.nNetThreads);
+        netManager = new NetworkManager(getIpAddress(ncConfig), partitionManager, ncConfig.nNetThreads);
 
         queue = new WorkQueue();
         jobletMap = new Hashtable<JobId, Joblet>();
@@ -216,7 +205,6 @@
         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()];
@@ -225,11 +213,10 @@
         }
         HeartbeatSchema hbSchema = new HeartbeatSchema(gcInfos);
         ccs.registerNode(new NodeRegistration(ipc.getSocketAddress(), id, ncConfig, netManager.getNetworkAddress(),
-                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));
+                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) {
@@ -260,10 +247,8 @@
         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");
     }
@@ -288,10 +273,6 @@
         return netManager;
     }
 
-    public DatasetNetworkManager getDatasetNetworkManager() {
-        return datasetNetworkManager;
-    }
-
     public PartitionManager getPartitionManager() {
         return partitionManager;
     }
@@ -316,7 +297,8 @@
         return queue;
     }
 
-    private static InetAddress getIpAddress(String ipaddrStr) throws Exception {
+    private static InetAddress getIpAddress(NCConfig ncConfig) throws Exception {
+        String ipaddrStr = ncConfig.dataIPAddress;
         ipaddrStr = ipaddrStr.trim();
         Pattern pattern = Pattern.compile("(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})");
         Matcher m = pattern.matcher(ipaddrStr);
@@ -373,12 +355,6 @@
             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();
@@ -483,10 +459,6 @@
         }
     }
 
-    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 5a3e9dd..eba3ec9 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
@@ -34,7 +34,6 @@
 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;
@@ -349,11 +348,6 @@
     }
 
     @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/DatasetPartitionManager.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionManager.java
deleted file mode 100644
index 85f17b1..0000000
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionManager.java
+++ /dev/null
@@ -1,118 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.control.nc.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.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, DatasetPartitionWriter[]> partitionDatasetWriterMap;
-
-    private final DefaultDeallocatableRegistry deallocatableRegistry;
-
-    private final IWorkspaceFileFactory fileFactory;
-
-    public DatasetPartitionManager(NodeControllerService ncs, Executor executor) {
-        this.ncs = ncs;
-        this.executor = executor;
-        partitionDatasetWriterMap = new HashMap<JobId, DatasetPartitionWriter[]>();
-        deallocatableRegistry = new DefaultDeallocatableRegistry();
-        fileFactory = new WorkspaceFileFactory(deallocatableRegistry, (IOManager) ncs.getRootContext().getIOManager());
-    }
-
-    @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, executor);
-
-            DatasetPartitionWriter[] writers = partitionDatasetWriterMap.get(jobId);
-            if (writers == null) {
-                writers = new DatasetPartitionWriter[nPartitions];
-                partitionDatasetWriterMap.put(jobId, writers);
-            }
-            writers[partition] = dpw;
-        } 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 {
-        DatasetPartitionWriter[] writers = partitionDatasetWriterMap.get(jobId);
-        if (writers == null) {
-            throw new HyracksException("Unknown JobId " + jobId);
-        }
-
-        DatasetPartitionWriter dpw = writers[partition];
-        if (dpw == null) {
-            throw new HyracksException("No DatasetPartitionWriter for partition " + partition);
-        }
-
-        dpw.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/DatasetPartitionWriter.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionWriter.java
deleted file mode 100644
index 0f5895e..0000000
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/dataset/DatasetPartitionWriter.java
+++ /dev/null
@@ -1,173 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.control.nc.dataset;
-
-import java.nio.ByteBuffer;
-import java.util.concurrent.Executor;
-import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import edu.uci.ics.hyracks.api.comm.IFrameWriter;
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.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.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.IPartition;
-import edu.uci.ics.hyracks.comm.channels.NetworkOutputChannel;
-
-public class DatasetPartitionWriter implements IFrameWriter, IPartition {
-    private static final Logger LOGGER = Logger.getLogger(DatasetPartitionWriter.class.getName());
-
-    private static final String FILE_PREFIX = "result_";
-
-    private final IHyracksTaskContext ctx;
-
-    private final IDatasetPartitionManager manager;
-
-    private final JobId jobId;
-
-    private final ResultSetId resultSetId;
-
-    private final int partition;
-
-    private final Executor executor;
-
-    private final AtomicBoolean eos;
-
-    private FileReference fRef;
-
-    private IFileHandle handle;
-
-    private long size;
-
-    public DatasetPartitionWriter(IHyracksTaskContext ctx, IDatasetPartitionManager manager, JobId jobId,
-            ResultSetId rsId, int partition, Executor executor) {
-        this.ctx = ctx;
-        this.manager = manager;
-        this.jobId = jobId;
-        this.resultSetId = rsId;
-        this.partition = partition;
-        this.executor = executor;
-        eos = new AtomicBoolean(false);
-    }
-
-    @Override
-    public void open() throws HyracksDataException {
-        if (LOGGER.isLoggable(Level.INFO)) {
-            LOGGER.info("open(" + partition + ")");
-        }
-        fRef = manager.getFileFactory().createUnmanagedWorkspaceFile(FILE_PREFIX + String.valueOf(partition));
-        handle = ctx.getIOManager().open(fRef, IIOManager.FileReadWriteMode.READ_WRITE,
-                IIOManager.FileSyncMode.METADATA_ASYNC_DATA_ASYNC);
-        size = 0;
-    }
-
-    @Override
-    public synchronized void nextFrame(ByteBuffer buffer) throws HyracksDataException {
-        size += ctx.getIOManager().syncWrite(handle, size, buffer);
-        notifyAll();
-    }
-
-    @Override
-    public void fail() throws HyracksDataException {
-        try {
-            manager.reportPartitionFailure(jobId, resultSetId, partition);
-        } catch (HyracksException e) {
-            throw new HyracksDataException(e);
-        }
-    }
-
-    @Override
-    public synchronized void close() throws HyracksDataException {
-        if (LOGGER.isLoggable(Level.INFO)) {
-            LOGGER.info("close(" + partition + ")");
-        }
-
-        try {
-            eos.set(true);
-            notifyAll();
-            manager.reportPartitionWriteCompletion(jobId, resultSetId, partition);
-        } catch (HyracksException e) {
-            throw new HyracksDataException(e);
-        }
-    }
-
-    @Override
-    public IHyracksTaskContext getTaskContext() {
-        return ctx;
-    }
-
-    private synchronized long read(long offset, ByteBuffer buffer) throws HyracksDataException {
-        while (offset >= size && !eos.get()) {
-            try {
-                wait();
-            } catch (InterruptedException e) {
-                throw new HyracksDataException(e);
-            }
-        }
-        return ctx.getIOManager().syncRead(handle, offset, buffer);
-    }
-
-    @Override
-    public void writeTo(final IFrameWriter writer) {
-        executor.execute(new Runnable() {
-            @Override
-            public void run() {
-                NetworkOutputChannel channel = (NetworkOutputChannel) writer;
-                channel.setTaskContext(ctx);
-                try {
-                    channel.open();
-                    try {
-                        long offset = 0;
-                        ByteBuffer buffer = ctx.allocateFrame();
-                        while (true) {
-                            buffer.clear();
-                            long size = read(offset, buffer);
-                            if (size < 0) {
-                                break;
-                            } else if (size < buffer.capacity()) {
-                                throw new HyracksDataException("Premature end of file");
-                            }
-                            offset += size;
-                            buffer.flip();
-                            channel.nextFrame(buffer);
-                        }
-                    } finally {
-                        channel.close();
-                        ctx.getIOManager().close(handle);
-                    }
-                } catch (HyracksDataException e) {
-                    throw new RuntimeException(e);
-                }
-            }
-        });
-    }
-
-    @Override
-    public boolean isReusable() {
-        return true;
-    }
-
-    @Override
-    public void deallocate() {
-
-    }
-}
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
deleted file mode 100644
index 5b8b333..0000000
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/DatasetNetworkManager.java
+++ /dev/null
@@ -1,127 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.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/NetworkInputChannel.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkInputChannel.java
new file mode 100644
index 0000000..1d5af84
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkInputChannel.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY 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.net.SocketAddress;
+import java.nio.ByteBuffer;
+import java.util.ArrayDeque;
+import java.util.Queue;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+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.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.partitions.PartitionId;
+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());
+
+    private final NetworkManager netManager;
+
+    private final SocketAddress remoteAddress;
+
+    private final PartitionId partitionId;
+
+    private final Queue<ByteBuffer> fullQueue;
+
+    private final int nBuffers;
+
+    private ChannelControlBlock ccb;
+
+    private IInputChannelMonitor monitor;
+
+    private Object attachment;
+
+    public NetworkInputChannel(NetworkManager netManager, SocketAddress remoteAddress, PartitionId partitionId,
+            int nBuffers) {
+        this.netManager = netManager;
+        this.remoteAddress = remoteAddress;
+        this.partitionId = partitionId;
+        fullQueue = new ArrayDeque<ByteBuffer>(nBuffers);
+        this.nBuffers = nBuffers;
+    }
+
+    @Override
+    public void registerMonitor(IInputChannelMonitor monitor) {
+        this.monitor = monitor;
+    }
+
+    @Override
+    public void setAttachment(Object attachment) {
+        this.attachment = attachment;
+    }
+
+    @Override
+    public Object getAttachment() {
+        return attachment;
+    }
+
+    @Override
+    public synchronized ByteBuffer getNextBuffer() {
+        return fullQueue.poll();
+    }
+
+    @Override
+    public void recycleBuffer(ByteBuffer buffer) {
+        buffer.clear();
+        ccb.getReadInterface().getEmptyBufferAcceptor().accept(buffer);
+    }
+
+    @Override
+    public void open(IHyracksTaskContext ctx) throws HyracksDataException {
+        try {
+            ccb = netManager.connect(remoteAddress);
+        } catch (Exception e) {
+            throw new HyracksDataException(e);
+        }
+        ccb.getReadInterface().setFullBufferAcceptor(new ReadFullBufferAcceptor());
+        ccb.getWriteInterface().setEmptyBufferAcceptor(new WriteEmptyBufferAcceptor());
+        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());
+        writeBuffer.flip();
+        if (LOGGER.isLoggable(Level.FINE)) {
+            LOGGER.fine("Sending partition request: " + partitionId + " on channel: " + ccb);
+        }
+        ccb.getWriteInterface().getFullBufferAcceptor().accept(writeBuffer);
+        ccb.getWriteInterface().getFullBufferAcceptor().close();
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+
+    }
+
+    private class ReadFullBufferAcceptor implements ICloseableBufferAcceptor {
+        @Override
+        public void accept(ByteBuffer buffer) {
+            fullQueue.add(buffer);
+            monitor.notifyDataAvailability(NetworkInputChannel.this, 1);
+        }
+
+        @Override
+        public void close() {
+            monitor.notifyEndOfStream(NetworkInputChannel.this);
+        }
+
+        @Override
+        public void error(int ecode) {
+            monitor.notifyFailure(NetworkInputChannel.this);
+        }
+    }
+
+    private class WriteEmptyBufferAcceptor implements IBufferAcceptor {
+        @Override
+        public void accept(ByteBuffer buffer) {
+            // do nothing
+        }
+    }
+}
\ 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 c8e4e94..b805595 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
@@ -27,8 +27,6 @@
 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;
@@ -38,7 +36,7 @@
 import edu.uci.ics.hyracks.net.protocols.muxdemux.MuxDemux;
 import edu.uci.ics.hyracks.net.protocols.muxdemux.MuxDemuxPerformanceCounters;
 
-public class NetworkManager implements IChannelConnectionFactory {
+public class NetworkManager {
     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/net/NetworkOutputChannel.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkOutputChannel.java
new file mode 100644
index 0000000..9024e18
--- /dev/null
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/net/NetworkOutputChannel.java
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY 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.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;
+
+public class NetworkOutputChannel implements IFrameWriter {
+    private final ChannelControlBlock ccb;
+
+    private final int nBuffers;
+
+    private final Deque<ByteBuffer> emptyStack;
+
+    private boolean aborted;
+
+    public NetworkOutputChannel(ChannelControlBlock ccb, int nBuffers) {
+        this.ccb = ccb;
+        this.nBuffers = nBuffers;
+        emptyStack = new ArrayDeque<ByteBuffer>(nBuffers);
+        ccb.getWriteInterface().setEmptyBufferAcceptor(new WriteEmptyBufferAcceptor());
+    }
+
+    public void setTaskContext(IHyracksTaskContext ctx) {
+        for (int i = 0; i < nBuffers; ++i) {
+            emptyStack.push(ByteBuffer.allocateDirect(ctx.getFrameSize()));
+        }
+    }
+
+    @Override
+    public void open() throws HyracksDataException {
+    }
+
+    @Override
+    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+        ByteBuffer destBuffer = null;
+        synchronized (this) {
+            while (true) {
+                if (aborted) {
+                    throw new HyracksDataException("Connection has been aborted");
+                }
+                destBuffer = emptyStack.poll();
+                if (destBuffer != null) {
+                    break;
+                }
+                try {
+                    wait();
+                } catch (InterruptedException e) {
+                    throw new HyracksDataException(e);
+                }
+            }
+        }
+        buffer.position(0);
+        buffer.limit(destBuffer.capacity());
+        destBuffer.clear();
+        destBuffer.put(buffer);
+        destBuffer.flip();
+        ccb.getWriteInterface().getFullBufferAcceptor().accept(destBuffer);
+    }
+
+    @Override
+    public void fail() throws HyracksDataException {
+        ccb.getWriteInterface().getFullBufferAcceptor().error(1);
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        ccb.getWriteInterface().getFullBufferAcceptor().close();
+    }
+
+    void abort() {
+        ccb.getWriteInterface().getFullBufferAcceptor().error(1);
+        synchronized (NetworkOutputChannel.this) {
+            aborted = true;
+            NetworkOutputChannel.this.notifyAll();
+        }
+    }
+
+    private class WriteEmptyBufferAcceptor implements IBufferAcceptor {
+        @Override
+        public void accept(ByteBuffer buffer) {
+            synchronized (NetworkOutputChannel.this) {
+                emptyStack.push(buffer);
+                NetworkOutputChannel.this.notifyAll();
+            }
+        }
+    }
+}
\ No newline at end of file
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 ba6e6c3..16e31f7 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.IHyracksCommonContext;
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 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(IHyracksCommonContext ctx) throws HyracksDataException {
+    public void open(IHyracksTaskContext 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 e532a0b..45c091a 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 {
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 7ed9d11..bb9669d 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;