diff --git a/genomix/genomix-core/src/main/java/edu/uci/ics/genomix/dataflow/FileScanDescriptor.java b/genomix/genomix-core/src/main/java/edu/uci/ics/genomix/dataflow/FileScanDescriptor.java
index 493ae1e..e7a8e6c 100644
--- a/genomix/genomix-core/src/main/java/edu/uci/ics/genomix/dataflow/FileScanDescriptor.java
+++ b/genomix/genomix-core/src/main/java/edu/uci/ics/genomix/dataflow/FileScanDescriptor.java
@@ -73,7 +73,7 @@
                     String s = "G:" + File.separator + "data"
                     		+ File.separator + "filename.txt";*/
 
-                    String s = "/Users/yingyib/data/filename" + String.valueOf(temp) + ".txt";
+                    String s = "g:\\data\\filename" + String.valueOf(temp) + ".txt";
 
                     filenames = new FileInputStream(s);
                     // filenames = new FileInputStream("filename.txt");
diff --git a/genomix/genomix-core/src/main/java/edu/uci/ics/genomix/dataflow/Tester.java b/genomix/genomix-core/src/main/java/edu/uci/ics/genomix/dataflow/Tester.java
index 067452c..c458f90 100644
--- a/genomix/genomix-core/src/main/java/edu/uci/ics/genomix/dataflow/Tester.java
+++ b/genomix/genomix-core/src/main/java/edu/uci/ics/genomix/dataflow/Tester.java
@@ -1,8 +1,12 @@
 package edu.uci.ics.genomix.dataflow;
 
+import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.File;
+import java.io.FileInputStream;
 import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.InputStreamReader;
 import java.io.OutputStreamWriter;
 import java.util.logging.Level;
 import java.util.logging.Logger;
@@ -11,6 +15,7 @@
 import edu.uci.ics.genomix.data.partition.KmerHashPartitioncomputerFactory;
 import edu.uci.ics.genomix.data.serde.ByteSerializerDeserializer;
 import edu.uci.ics.genomix.data.std.accessors.LongBinaryHashFunctionFamily;
+import edu.uci.ics.genomix.data.std.accessors.MurmurHash3BinaryHashFunctionFamily;
 import edu.uci.ics.genomix.dataflow.aggregators.DistributedMergeLmerAggregateFactory;
 import edu.uci.ics.genomix.dataflow.aggregators.MergeKmerAggregateFactory;
 import edu.uci.ics.hyracks.api.client.HyracksConnection;
@@ -23,11 +28,15 @@
 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.IBinaryHashFunctionFamily;
+import edu.uci.ics.hyracks.api.dataflow.value.INormalizedKeyComputerFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 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.ITuplePartitionComputerFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.job.IConnectorDescriptorRegistry;
+import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.api.job.JobId;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
@@ -36,7 +45,9 @@
 import edu.uci.ics.hyracks.control.nc.NodeControllerService;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryComparatorFactory;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryHashFunctionFactory;
+import edu.uci.ics.hyracks.data.std.accessors.UTF8StringBinaryHashFunctionFamily;
 import edu.uci.ics.hyracks.data.std.primitive.LongPointable;
+import edu.uci.ics.hyracks.dataflow.common.comm.util.FrameUtils;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.Integer64SerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.common.data.partition.FieldHashPartitionComputerFactory;
@@ -45,6 +56,7 @@
 import edu.uci.ics.hyracks.dataflow.std.connectors.MToNPartitioningMergingConnectorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.group.HashSpillableTableFactory;
+import edu.uci.ics.hyracks.dataflow.std.group.IAggregatorDescriptorFactory;
 import edu.uci.ics.hyracks.dataflow.std.group.external.ExternalGroupOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.group.hybridhash.HybridHashGroupOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.group.preclustered.PreclusteredGroupOperatorDescriptor;
@@ -52,367 +64,309 @@
 
 public class Tester {
 
-	private static final Logger LOGGER = Logger.getLogger(Tester.class
-			.getName());
-	public static final String NC1_ID = "nc1";
-	public static final String NC2_ID = "nc2";
-	public static final String NC3_ID = "nc3";
-	public static final String NC4_ID = "nc4";
+    private static final Logger LOGGER = Logger.getLogger(Tester.class.getName());
+    public static final String NC1_ID = "nc1";
+    public static final String NC2_ID = "nc2";
+    public static final String NC3_ID = "nc3";
+    public static final String NC4_ID = "nc4";
 
-	private static ClusterControllerService cc;
-	private static NodeControllerService nc1;
-	private static NodeControllerService nc2;
-	private static NodeControllerService nc3;
-	private static NodeControllerService nc4;
-	private static IHyracksClientConnection hcc;
+    private static ClusterControllerService cc;
+    private static NodeControllerService nc1;
+    private static NodeControllerService nc2;
+    private static NodeControllerService nc3;
+    private static NodeControllerService nc4;
+    private static IHyracksClientConnection hcc;
 
-	// private static final boolean DEBUG = true;
+    //private static final boolean DEBUG = true;
 
-	public static void main(String[] args) throws Exception {
+    public static void main(String[] args) throws Exception {
 
-		LOGGER.setLevel(Level.OFF);
+        LOGGER.setLevel(Level.OFF);
 
-		init();
+        init();
 
-		// Options options = new Options();
+        // Options options = new Options();
 
-		IHyracksClientConnection hcc = new HyracksConnection("127.0.0.1", 39000);
+        IHyracksClientConnection hcc = new HyracksConnection("127.0.0.1", 39000);
 
-		/*
-		 * JobSpecification job =
-		 * createJob(parseFileSplits(options.inFileCustomerSplits),
-		 * parseFileSplits(options.inFileOrderSplits),
-		 * parseFileSplits(options.outFileSplits), options.numJoinPartitions,
-		 * options.algo, options.graceInputSize, options.graceRecordsPerFrame,
-		 * options.graceFactor, options.memSize, options.tableSize,
-		 * options.hasGroupBy);
-		 */
+        /*
+         * JobSpecification job =
+         * createJob(parseFileSplits(options.inFileCustomerSplits),
+         * parseFileSplits(options.inFileOrderSplits),
+         * parseFileSplits(options.outFileSplits), options.numJoinPartitions,
+         * options.algo, options.graceInputSize, options.graceRecordsPerFrame,
+         * options.graceFactor, options.memSize, options.tableSize,
+         * options.hasGroupBy);
+         */
 
-		int k, page_num;
-		String file_name = args[0];
-		k = Integer.parseInt(args[1]);
-		page_num = Integer.parseInt(args[2]);
-		int type = Integer.parseInt(args[3]);
+        int k, page_num;
+        String file_name = args[0];
+        k = Integer.parseInt(args[1]);
+        page_num = Integer.parseInt(args[2]);
+        int type = Integer.parseInt(args[3]);
 
-		JobSpecification job = createJob(file_name, k, page_num, type);
+        JobSpecification job = createJob(file_name, k, page_num, type);
 
-		long start = System.currentTimeMillis();
-		JobId jobId = hcc.startJob("test", job);
-		hcc.waitForCompletion(jobId);
-		long end = System.currentTimeMillis();
-		System.err.println(start + " " + end + " " + (end - start));
+        long start = System.currentTimeMillis();
+        JobId jobId = hcc.startJob("test", job);
+        hcc.waitForCompletion(jobId);
+        long end = System.currentTimeMillis();
+        System.err.println(start + " " + end + " " + (end - start));
+        
+    /*    FileOutputStream filenames;
 
-		FileOutputStream filenames;
+        String s = "g:\\data\\results.txt" ;
 
-		String s = "/Users/yingyib/data/results.txt";
+        filenames = new FileOutputStream(s);
+        // filenames = new FileInputStream("filename.txt");
 
-		filenames = new FileOutputStream(s);
-		// filenames = new FileInputStream("filename.txt");
+        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(filenames));
+        writer.write((int) (end-start));
+        writer.close();*/
+        
+    }
 
-		BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(
-				filenames));
-		writer.write((int) (end - start));
-		writer.close();
+    public static void init() throws Exception {
+        CCConfig ccConfig = new CCConfig();
+        ccConfig.clientNetIpAddress = "127.0.0.1";
+        ccConfig.clientNetPort = 39000;
+        ccConfig.clusterNetIpAddress = "127.0.0.1";
+        ccConfig.clusterNetPort = 39001;
+        ccConfig.profileDumpPeriod = -1;
+        File outDir = new File("target/ClusterController");
+        outDir.mkdirs();
+        File ccRoot = File.createTempFile(Tester.class.getName(), ".data", outDir);
+        ccRoot.delete();
+        ccRoot.mkdir();
+        ccConfig.ccRoot = ccRoot.getAbsolutePath();
+        cc = new ClusterControllerService(ccConfig);
+        cc.start();
 
-	}
+        NCConfig ncConfig1 = new NCConfig();
+        ncConfig1.ccHost = "localhost";
+        ncConfig1.ccPort = 39001;
+        ncConfig1.clusterNetIPAddress = "127.0.0.1";
+        ncConfig1.dataIPAddress = "127.0.0.1";
+        ncConfig1.nodeId = NC1_ID;
+        nc1 = new NodeControllerService(ncConfig1);
+        nc1.start();
 
-	public static void init() throws Exception {
-		CCConfig ccConfig = new CCConfig();
-		ccConfig.clientNetIpAddress = "127.0.0.1";
-		ccConfig.clientNetPort = 39000;
-		ccConfig.clusterNetIpAddress = "127.0.0.1";
-		ccConfig.clusterNetPort = 39001;
-		ccConfig.profileDumpPeriod = -1;
-		File outDir = new File("target/ClusterController");
-		outDir.mkdirs();
-		File ccRoot = File.createTempFile(Tester.class.getName(), ".data",
-				outDir);
-		ccRoot.delete();
-		ccRoot.mkdir();
-		ccConfig.ccRoot = ccRoot.getAbsolutePath();
-		cc = new ClusterControllerService(ccConfig);
-		cc.start();
+        NCConfig ncConfig2 = new NCConfig();
+        ncConfig2.ccHost = "localhost";
+        ncConfig2.ccPort = 39001;
+        ncConfig2.clusterNetIPAddress = "127.0.0.1";
+        ncConfig2.dataIPAddress = "127.0.0.1";
+        ncConfig2.nodeId = NC2_ID;
+        nc2 = new NodeControllerService(ncConfig2);
+        nc2.start();
+        
+        NCConfig ncConfig3 = new NCConfig();
+        ncConfig3.ccHost = "localhost";
+        ncConfig3.ccPort = 39001;
+        ncConfig3.clusterNetIPAddress = "127.0.0.1";
+        ncConfig3.dataIPAddress = "127.0.0.1";
+        ncConfig3.nodeId = NC3_ID;
+        nc3 = new NodeControllerService(ncConfig3);
+        nc3.start();
+        
+        NCConfig ncConfig4 = new NCConfig();
+        ncConfig4.ccHost = "localhost";
+        ncConfig4.ccPort = 39001;
+        ncConfig4.clusterNetIPAddress = "127.0.0.1";
+        ncConfig4.dataIPAddress = "127.0.0.1";
+        ncConfig4.nodeId = NC4_ID;
+        nc4 = new NodeControllerService(ncConfig4);
+        nc4.start();
 
-		NCConfig ncConfig1 = new NCConfig();
-		ncConfig1.ccHost = "localhost";
-		ncConfig1.ccPort = 39001;
-		ncConfig1.clusterNetIPAddress = "127.0.0.1";
-		ncConfig1.dataIPAddress = "127.0.0.1";
-		ncConfig1.nodeId = NC1_ID;
-		ncConfig1.ioDevices = "/tmp/t1";
-		nc1 = new NodeControllerService(ncConfig1);
-		nc1.start();
+        hcc = new HyracksConnection(ccConfig.clientNetIpAddress, ccConfig.clientNetPort);
+        hcc.createApplication("test", null);
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("Starting CC in " + ccRoot.getAbsolutePath());
+        }
+    }
 
-		NCConfig ncConfig2 = new NCConfig();
-		ncConfig2.ccHost = "localhost";
-		ncConfig2.ccPort = 39001;
-		ncConfig2.clusterNetIPAddress = "127.0.0.1";
-		ncConfig2.dataIPAddress = "127.0.0.1";
-		ncConfig2.nodeId = NC2_ID;
-		ncConfig2.ioDevices = "/tmp/t2";
-		nc2 = new NodeControllerService(ncConfig2);
-		nc2.start();
+    private static JobSpecification createJob(String filename, int k, int page_num, int type) throws HyracksDataException {
+        JobSpecification spec = new JobSpecification();
 
-		NCConfig ncConfig3 = new NCConfig();
-		ncConfig3.ccHost = "localhost";
-		ncConfig3.ccPort = 39001;
-		ncConfig3.clusterNetIPAddress = "127.0.0.1";
-		ncConfig3.dataIPAddress = "127.0.0.1";
-		ncConfig3.nodeId = NC3_ID;
-		ncConfig3.ioDevices = "/tmp/t3";
-		nc3 = new NodeControllerService(ncConfig3);
-		nc3.start();
+        spec.setFrameSize(32768);
 
-		NCConfig ncConfig4 = new NCConfig();
-		ncConfig4.ccHost = "localhost";
-		ncConfig4.ccPort = 39001;
-		ncConfig4.clusterNetIPAddress = "127.0.0.1";
-		ncConfig4.dataIPAddress = "127.0.0.1";
-		ncConfig4.nodeId = NC4_ID;
-		ncConfig4.ioDevices = "/tmp/t4";
-		nc4 = new NodeControllerService(ncConfig4);
-		nc4.start();
+        FileScanDescriptor scan = new FileScanDescriptor(spec, k);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, scan, NC1_ID, NC2_ID,NC3_ID,NC4_ID);
+        //PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, scan, NC1_ID);
 
-		hcc = new HyracksConnection(ccConfig.clientNetIpAddress,
-				ccConfig.clientNetPort);
-		hcc.createApplication("test", null);
-		if (LOGGER.isLoggable(Level.INFO)) {
-			LOGGER.info("Starting CC in " + ccRoot.getAbsolutePath());
-		}
-	}
+        RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {
+                Integer64SerializerDeserializer.INSTANCE, ByteSerializerDeserializer.INSTANCE,
+                IntegerSerializerDeserializer.INSTANCE });
 
-	private static JobSpecification createJob(String filename, int k,
-			int page_num, int type) throws HyracksDataException {
-		JobSpecification spec = new JobSpecification();
+        int[] keyFields = new int[] { 0 };
+        int frameLimits = 4096;
+        int tableSize = 10485767;
 
-		spec.setFrameSize(32768);
+        AbstractOperatorDescriptor single_grouper;
+        IConnectorDescriptor conn_partition;
+        AbstractOperatorDescriptor cross_grouper;
+        
 
-		FileScanDescriptor scan = new FileScanDescriptor(spec, k);
-		PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, scan,
-				NC1_ID, NC2_ID, NC3_ID, NC4_ID);
-		// PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, scan,
-		// NC1_ID);
+        
+        if(0 == type){//external group by
+            single_grouper = new ExternalGroupOperatorDescriptor(spec, keyFields,
+                    frameLimits,
+                    new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(LongPointable.FACTORY) },
+                    new Integer64NormalizedKeyComputerFactory(), new MergeKmerAggregateFactory(),
+                    // new IntSumFieldAggregatorFactory(1, false) }),
 
-		RecordDescriptor outputRec = new RecordDescriptor(
-				new ISerializerDeserializer[] {
-						Integer64SerializerDeserializer.INSTANCE,
-						ByteSerializerDeserializer.INSTANCE,
-						IntegerSerializerDeserializer.INSTANCE });
+                    new DistributedMergeLmerAggregateFactory(),
+                    // new IntSumFieldAggregatorFactory(1, false) }),
+                    outputRec, new HashSpillableTableFactory(
+                            new FieldHashPartitionComputerFactory(keyFields,
+                                    new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
+                                            .of(LongPointable.FACTORY) }), tableSize), true);
+        
+            conn_partition = new MToNPartitioningConnectorDescriptor(spec,
+                    new KmerHashPartitioncomputerFactory());
+            cross_grouper = new ExternalGroupOperatorDescriptor(spec, keyFields,
+                    frameLimits,
+                    new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(LongPointable.FACTORY) },
+                    new Integer64NormalizedKeyComputerFactory(), new DistributedMergeLmerAggregateFactory(),
+                    // new IntSumFieldAggregatorFactory(1, false) }),
 
-		int[] keyFields = new int[] { 0 };
-		int frameLimits = 4096;
-		int tableSize = 10485767;
+                    new DistributedMergeLmerAggregateFactory(),
+                    // new IntSumFieldAggregatorFactory(1, false) }),
+                    outputRec, new HashSpillableTableFactory(
+                            new FieldHashPartitionComputerFactory(keyFields,
+                                    new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
+                                            .of(LongPointable.FACTORY) }), tableSize), true);
+        }
+        else if( 1 == type){
+            single_grouper = new ExternalGroupOperatorDescriptor(spec, keyFields,
+                    frameLimits,
+                    new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(LongPointable.FACTORY) },
+                    new Integer64NormalizedKeyComputerFactory(), new MergeKmerAggregateFactory(),
+                    // new IntSumFieldAggregatorFactory(1, false) }),
+                    new DistributedMergeLmerAggregateFactory(),
+                    // new IntSumFieldAggregatorFactory(1, false) }),
+                    outputRec, new HashSpillableTableFactory(
+                            new FieldHashPartitionComputerFactory(keyFields,
+                                    new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
+                                            .of(LongPointable.FACTORY) }), tableSize), true);
+            conn_partition = new  MToNPartitioningMergingConnectorDescriptor(spec, new KmerHashPartitioncomputerFactory(), 
+                  keyFields, new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(LongPointable.FACTORY)} );
+            cross_grouper = new PreclusteredGroupOperatorDescriptor(spec, keyFields, 
+                    new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(LongPointable.FACTORY) },  
+                    new DistributedMergeLmerAggregateFactory(), 
+                    outputRec);
+        }
+        else{
+            long inputSizeInRawRecords = 154000000;
+            long inputSizeInUniqueKeys = 38500000;
+            int recordSizeInBytes = 9;
+            int hashfuncStartLevel = 1;
+            single_grouper = new HybridHashGroupOperatorDescriptor(spec, keyFields,
+                    frameLimits, inputSizeInRawRecords, inputSizeInUniqueKeys, recordSizeInBytes, tableSize,
+                    new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(LongPointable.FACTORY) },
+                    //new IBinaryHashFunctionFamily[] {new LongBinaryHashFunctionFamily()},
+                    new IBinaryHashFunctionFamily[] {MurmurHash3BinaryHashFunctionFamily.INSTANCE},
+                    hashfuncStartLevel, 
+                    new Integer64NormalizedKeyComputerFactory(),
+                    new MergeKmerAggregateFactory(),
+                    new DistributedMergeLmerAggregateFactory(),
+                    outputRec, true);
+            conn_partition = new MToNPartitioningConnectorDescriptor(spec,
+                    new KmerHashPartitioncomputerFactory());
+            recordSizeInBytes = 13;
+            cross_grouper = new HybridHashGroupOperatorDescriptor(spec, keyFields,
+                    frameLimits, inputSizeInRawRecords, inputSizeInUniqueKeys, recordSizeInBytes, tableSize,
+                    new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(LongPointable.FACTORY) },
+                    //new IBinaryHashFunctionFamily[] {new LongBinaryHashFunctionFamily()},
+                    new IBinaryHashFunctionFamily[] {MurmurHash3BinaryHashFunctionFamily.INSTANCE},
+                    hashfuncStartLevel, 
+                    new Integer64NormalizedKeyComputerFactory(),
+                    new DistributedMergeLmerAggregateFactory(),
+                    new DistributedMergeLmerAggregateFactory(),
+                    outputRec, true);            
+        }
+        
+        //PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, single_grouper, NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, single_grouper, NC1_ID, NC2_ID,NC3_ID,NC4_ID);
+        
+        IConnectorDescriptor readfileConn = new OneToOneConnectorDescriptor(spec);
+        spec.connect(readfileConn, scan, 0, single_grouper, 0);
 
-		AbstractOperatorDescriptor single_grouper;
-		IConnectorDescriptor conn_partition;
-		AbstractOperatorDescriptor cross_grouper;
+        //PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, cross_grouper,NC1_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, cross_grouper, NC1_ID, NC2_ID,NC3_ID,NC4_ID);
+        spec.connect(conn_partition, single_grouper, 0, cross_grouper, 0);
 
-		if (0 == type) {// external group by
-			single_grouper = new ExternalGroupOperatorDescriptor(
-					spec,
-					keyFields,
-					frameLimits,
-					new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-							.of(LongPointable.FACTORY) },
-					new Integer64NormalizedKeyComputerFactory(),
-					new MergeKmerAggregateFactory(),
-					// new IntSumFieldAggregatorFactory(1, false) }),
+        PrinterOperatorDescriptor printer = new PrinterOperatorDescriptor(spec);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID, NC2_ID,NC3_ID,NC4_ID);
+        //PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
-					new DistributedMergeLmerAggregateFactory(),
-					// new IntSumFieldAggregatorFactory(1, false) }),
-					outputRec,
-					new HashSpillableTableFactory(
-							new FieldHashPartitionComputerFactory(
-									keyFields,
-									new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
-											.of(LongPointable.FACTORY) }),
-							tableSize), true);
+        IConnectorDescriptor printConn = new OneToOneConnectorDescriptor(spec);
+        spec.connect(printConn, cross_grouper, 0, printer, 0);
 
-			conn_partition = new MToNPartitioningConnectorDescriptor(spec,
-					new KmerHashPartitioncomputerFactory());
-			cross_grouper = new ExternalGroupOperatorDescriptor(
-					spec,
-					keyFields,
-					frameLimits,
-					new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-							.of(LongPointable.FACTORY) },
-					new Integer64NormalizedKeyComputerFactory(),
-					new DistributedMergeLmerAggregateFactory(),
-					// new IntSumFieldAggregatorFactory(1, false) }),
+        spec.addRoot(printer);
 
-					new DistributedMergeLmerAggregateFactory(),
-					// new IntSumFieldAggregatorFactory(1, false) }),
-					outputRec,
-					new HashSpillableTableFactory(
-							new FieldHashPartitionComputerFactory(
-									keyFields,
-									new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
-											.of(LongPointable.FACTORY) }),
-							tableSize), true);
-		} else if (1 == type) {
-			single_grouper = new ExternalGroupOperatorDescriptor(
-					spec,
-					keyFields,
-					frameLimits,
-					new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-							.of(LongPointable.FACTORY) },
-					new Integer64NormalizedKeyComputerFactory(),
-					new MergeKmerAggregateFactory(),
-					// new IntSumFieldAggregatorFactory(1, false) }),
-					new DistributedMergeLmerAggregateFactory(),
-					// new IntSumFieldAggregatorFactory(1, false) }),
-					outputRec,
-					new HashSpillableTableFactory(
-							new FieldHashPartitionComputerFactory(
-									keyFields,
-									new IBinaryHashFunctionFactory[] { PointableBinaryHashFunctionFactory
-											.of(LongPointable.FACTORY) }),
-							tableSize), true);
-			conn_partition = new MToNPartitioningMergingConnectorDescriptor(
-					spec,
-					new KmerHashPartitioncomputerFactory(),
-					keyFields,
-					new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-							.of(LongPointable.FACTORY) });
-			cross_grouper = new PreclusteredGroupOperatorDescriptor(
-					spec,
-					keyFields,
-					new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-							.of(LongPointable.FACTORY) },
-					new DistributedMergeLmerAggregateFactory(), outputRec);
-		} else {
-			long inputSizeInRawRecords = 154000000;
-			long inputSizeInUniqueKeys = 38500000;
-			int recordSizeInBytes = 9;
-			int hashfuncStartLevel = 1;
-			single_grouper = new HybridHashGroupOperatorDescriptor(
-					spec,
-					keyFields,
-					frameLimits,
-					inputSizeInRawRecords,
-					inputSizeInUniqueKeys,
-					recordSizeInBytes,
-					tableSize,
-					new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-							.of(LongPointable.FACTORY) },
-					new IBinaryHashFunctionFamily[] { new LongBinaryHashFunctionFamily() },
-					hashfuncStartLevel,
-					new Integer64NormalizedKeyComputerFactory(),
-					new MergeKmerAggregateFactory(),
-					new DistributedMergeLmerAggregateFactory(), outputRec, true);
-			conn_partition = new MToNPartitioningConnectorDescriptor(spec,
-					new KmerHashPartitioncomputerFactory());
-			recordSizeInBytes = 13;
-			cross_grouper = new HybridHashGroupOperatorDescriptor(
-					spec,
-					keyFields,
-					frameLimits,
-					inputSizeInRawRecords,
-					inputSizeInUniqueKeys,
-					recordSizeInBytes,
-					tableSize,
-					new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory
-							.of(LongPointable.FACTORY) },
-					new IBinaryHashFunctionFamily[] { new LongBinaryHashFunctionFamily() },
-					hashfuncStartLevel,
-					new Integer64NormalizedKeyComputerFactory(),
-					new DistributedMergeLmerAggregateFactory(),
-					new DistributedMergeLmerAggregateFactory(), outputRec, true);
-		}
+        if( 1 == type ){
+            spec.setConnectorPolicyAssignmentPolicy(new ConnectorPolicyAssignmentPolicy());
+        }
+        // System.out.println(spec.toString());
+        return spec;
+    }
 
-		// PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-		// single_grouper, NC1_ID);
-		PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-				single_grouper, NC1_ID, NC2_ID, NC3_ID, NC4_ID);
 
-		IConnectorDescriptor readfileConn = new OneToOneConnectorDescriptor(
-				spec);
-		spec.connect(readfileConn, scan, 0, single_grouper, 0);
+    static class JoinComparatorFactory implements ITuplePairComparatorFactory {
+        private static final long serialVersionUID = 1L;
 
-		// PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-		// cross_grouper,NC1_ID);
-		PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-				cross_grouper, NC1_ID, NC2_ID, NC3_ID, NC4_ID);
-		spec.connect(conn_partition, single_grouper, 0, cross_grouper, 0);
+        private final IBinaryComparatorFactory bFactory;
+        private final int pos0;
+        private final int pos1;
 
-		PrinterOperatorDescriptor printer = new PrinterOperatorDescriptor(spec);
-		PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer,
-				NC1_ID, NC2_ID, NC3_ID, NC4_ID);
-		// PartitionConstraintHelper.addAbsoluteLocationConstraint(spec,
-		// printer, NC1_ID);
+        public JoinComparatorFactory(IBinaryComparatorFactory bFactory, int pos0, int pos1) {
+            this.bFactory = bFactory;
+            this.pos0 = pos0;
+            this.pos1 = pos1;
+        }
 
-		IConnectorDescriptor printConn = new OneToOneConnectorDescriptor(spec);
-		spec.connect(printConn, cross_grouper, 0, printer, 0);
+        @Override
+        public ITuplePairComparator createTuplePairComparator(IHyracksTaskContext ctx) {
+            return new JoinComparator(bFactory.createBinaryComparator(), pos0, pos1);
+        }
+    }
 
-		spec.addRoot(printer);
+    static class JoinComparator implements ITuplePairComparator {
 
-		if (1 == type) {
-			spec.setConnectorPolicyAssignmentPolicy(new ConnectorPolicyAssignmentPolicy());
-		}
-		// System.out.println(spec.toString());
-		return spec;
-	}
+        private final IBinaryComparator bComparator;
+        private final int field0;
+        private final int field1;
 
-	static class JoinComparatorFactory implements ITuplePairComparatorFactory {
-		private static final long serialVersionUID = 1L;
+        public JoinComparator(IBinaryComparator bComparator, int field0, int field1) {
+            this.bComparator = bComparator;
+            this.field0 = field0;
+            this.field1 = field1;
+        }
 
-		private final IBinaryComparatorFactory bFactory;
-		private final int pos0;
-		private final int pos1;
+        @Override
+        public int compare(IFrameTupleAccessor accessor0, int tIndex0, IFrameTupleAccessor accessor1, int tIndex1) {
+            int tStart0 = accessor0.getTupleStartOffset(tIndex0);
+            int fStartOffset0 = accessor0.getFieldSlotsLength() + tStart0;
 
-		public JoinComparatorFactory(IBinaryComparatorFactory bFactory,
-				int pos0, int pos1) {
-			this.bFactory = bFactory;
-			this.pos0 = pos0;
-			this.pos1 = pos1;
-		}
+            int tStart1 = accessor1.getTupleStartOffset(tIndex1);
+            int fStartOffset1 = accessor1.getFieldSlotsLength() + tStart1;
 
-		@Override
-		public ITuplePairComparator createTuplePairComparator(
-				IHyracksTaskContext ctx) {
-			return new JoinComparator(bFactory.createBinaryComparator(), pos0,
-					pos1);
-		}
-	}
+            int fStart0 = accessor0.getFieldStartOffset(tIndex0, field0);
+            int fEnd0 = accessor0.getFieldEndOffset(tIndex0, field0);
+            int fLen0 = fEnd0 - fStart0;
 
-	static class JoinComparator implements ITuplePairComparator {
+            int fStart1 = accessor1.getFieldStartOffset(tIndex1, field1);
+            int fEnd1 = accessor1.getFieldEndOffset(tIndex1, field1);
+            int fLen1 = fEnd1 - fStart1;
 
-		private final IBinaryComparator bComparator;
-		private final int field0;
-		private final int field1;
-
-		public JoinComparator(IBinaryComparator bComparator, int field0,
-				int field1) {
-			this.bComparator = bComparator;
-			this.field0 = field0;
-			this.field1 = field1;
-		}
-
-		@Override
-		public int compare(IFrameTupleAccessor accessor0, int tIndex0,
-				IFrameTupleAccessor accessor1, int tIndex1) {
-			int tStart0 = accessor0.getTupleStartOffset(tIndex0);
-			int fStartOffset0 = accessor0.getFieldSlotsLength() + tStart0;
-
-			int tStart1 = accessor1.getTupleStartOffset(tIndex1);
-			int fStartOffset1 = accessor1.getFieldSlotsLength() + tStart1;
-
-			int fStart0 = accessor0.getFieldStartOffset(tIndex0, field0);
-			int fEnd0 = accessor0.getFieldEndOffset(tIndex0, field0);
-			int fLen0 = fEnd0 - fStart0;
-
-			int fStart1 = accessor1.getFieldStartOffset(tIndex1, field1);
-			int fEnd1 = accessor1.getFieldEndOffset(tIndex1, field1);
-			int fLen1 = fEnd1 - fStart1;
-
-			int c = bComparator.compare(accessor0.getBuffer().array(), fStart0
-					+ fStartOffset0, fLen0, accessor1.getBuffer().array(),
-					fStart1 + fStartOffset1, fLen1);
-			if (c != 0) {
-				return c;
-			}
-			return 0;
-		}
-	}
+            int c = bComparator.compare(accessor0.getBuffer().array(), fStart0 + fStartOffset0, fLen0, accessor1
+                    .getBuffer().array(), fStart1 + fStartOffset1, fLen1);
+            if (c != 0) {
+                return c;
+            }
+            return 0;
+        }
+    }
 
 }
diff --git a/genomix/genomix-core/src/main/resources/conf/cluster.properties b/genomix/genomix-core/src/main/resources/conf/cluster.properties
index 5b2b757..c9e87f0 100644
--- a/genomix/genomix-core/src/main/resources/conf/cluster.properties
+++ b/genomix/genomix-core/src/main/resources/conf/cluster.properties
@@ -5,7 +5,7 @@
 CC_CLUSTERPORT=1099
 
 #The directory of hyracks binaries
-HYRACKS_HOME="../../../../hyracks"
+HYRACKS_HOME="../../../hyracks"
 
 #The tmp directory for cc to install jars
 CCTMP_DIR=/tmp/t1