diff --git a/genomix/genomix-core/src/main/java/edu/uci/ics/genomix/data/std/primitive/VLongPointable.java b/genomix/genomix-core/src/main/java/edu/uci/ics/genomix/data/std/primitive/VLongPointable.java
index 77cfd6e..3b8f22c 100644
--- a/genomix/genomix-core/src/main/java/edu/uci/ics/genomix/data/std/primitive/VLongPointable.java
+++ b/genomix/genomix-core/src/main/java/edu/uci/ics/genomix/data/std/primitive/VLongPointable.java
@@ -64,6 +64,7 @@
 			if (bytes[i] != 0) {
 				break;
 			}
+			i += 1;
 		}
 		return bytes;
 	}
@@ -78,30 +79,41 @@
 	public int compareTo(byte[] bytes, int start, int length) {
 
 		int be = this.start;
-		int n = (this.bytes[be] < bytes[start]) ? this.bytes[be] : bytes[start];
+		
+		if(this.bytes[be] != bytes[start]){
+			return (this.bytes[be] < bytes[start]) ? -1 : 1;
+		}
+		
+		int n = this.bytes[be];
 		int l = (int) Math.ceil(n / 4);
 		for (int i = 0; i <= l; i++) {
-			if (this.bytes[i] < bytes[i]) {
+			if (this.bytes[be + i] < bytes[start + i]) {
 				return -1;
-			} else if (this.bytes[i] > bytes[i]) {
+			} else if (this.bytes[be + i] > bytes[start + i]) {
 				return 1;
 			}
 
 		}
-
-		return (this.bytes[be] < bytes[start]) ? -1
-				: ((this.bytes[be] > bytes[start]) ? 1 : 0);
+		return 0;
 	}
 
 	@Override
 	public int hash() {// BKDRHash
-		int seed = 131; // 31 131 1313 13131 131313 etc..
+		int hash = 1;
+		for (int i = start + 1; i <= start + length; i++)
+			hash = (31 * hash) + (int)bytes[i];
+		if(hash < 0){
+			hash = -hash;
+		}
+		//System.err.println(hash);
+		return hash;
+/*		int seed = 131; // 31 131 1313 13131 131313 etc..
 		int hash = 0;
 		int l = (int) Math.ceil((double) bytes[start] / 4.0);
 		for (int i = start + 1; i <= start + l; i++) {
 			hash = hash * seed + bytes[i];
 		}
-		return (hash & 0x7FFFFFFF);
+		return (hash & 0x7FFFFFFF);*/
 	}
 
 	@Override
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 ebc5346..f0b277a 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
@@ -93,15 +93,19 @@
 								new InputStreamReader(
 										new FileInputStream(fa[i])));
 						String read = readsfile.readLine();
+						int count  = 0;
 						while (read != null) {
 							read = readsfile.readLine();
+							//if(count % 4 == 1)
 							SplitReads(read.getBytes());
 							// read.getBytes();
-
 							read = readsfile.readLine();
+							
 							read = readsfile.readLine();
 
 							read = readsfile.readLine();
+							count += 1;
+							System.err.println(count);
 						}
 					}
 					if (outputAppender.getTupleCount() > 0) {
@@ -220,14 +224,15 @@
 				bytes[i] <<= 2;
 				bytes[i] &= filter2;
 				i -= 1;
-				while (i > 0) {
+				while (i >= 0) {
 					byte f = (byte) (bytes[i] & filter0);
 					f >>= 6;
 					bytes[i + 1] |= f;
 					bytes[i] <<= 2;
 					bytes[i] &= filter1;
+					i -= 1;
 				}
-				bytes[i + 1] |= ConvertSymbol(c);
+				bytes[0] |= ConvertSymbol(c);
 			}
 
 			private void SplitReads(byte[] array) {
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 f455604..22cb0f7 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
@@ -136,7 +136,7 @@
         nc1 = new NodeControllerService(ncConfig1);
         nc1.start();
 
-        NCConfig ncConfig2 = new NCConfig();
+  /*      NCConfig ncConfig2 = new NCConfig();
         ncConfig2.ccHost = "localhost";
         ncConfig2.ccPort = 39001;
         ncConfig2.clusterNetIPAddress = "127.0.0.1";
@@ -161,7 +161,7 @@
         ncConfig4.dataIPAddress = "127.0.0.1";
         ncConfig4.nodeId = NC4_ID;
         nc4 = new NodeControllerService(ncConfig4);
-        nc4.start();
+        nc4.start();*/
 
         hcc = new HyracksConnection(ccConfig.clientNetIpAddress, ccConfig.clientNetPort);
         hcc.createApplication("test", null);
@@ -174,11 +174,11 @@
         JobSpecification spec = new JobSpecification();
 
         //spec.setFrameSize(32768);
-        spec.setFrameSize(64);
+        spec.setFrameSize(32768);
 
         FileScanDescriptor scan = new FileScanDescriptor(spec, k, filename);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, scan, NC1_ID, NC2_ID,NC3_ID,NC4_ID);
-        //PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, scan, NC1_ID);
+        //PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, scan, NC1_ID, NC2_ID,NC3_ID,NC4_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, scan, NC1_ID);
 
         RecordDescriptor outputRec = new RecordDescriptor(new ISerializerDeserializer[] {null, ByteSerializerDeserializer.INSTANCE, ByteSerializerDeserializer.INSTANCE});
                 //Integer64SerializerDeserializer.INSTANCE, ByteSerializerDeserializer.INSTANCE,
@@ -271,21 +271,21 @@
                     outputRec, true);            
         }
         
-        //PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, single_grouper, NC1_ID);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, single_grouper, NC1_ID, NC2_ID,NC3_ID,NC4_ID);
+        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);
         
 
-        //PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, cross_grouper,NC1_ID);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, cross_grouper, NC1_ID, NC2_ID,NC3_ID,NC4_ID);
+        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);
 
         //PrinterOperatorDescriptor printer = new PrinterOperatorDescriptor(spec, "G:\\data\\result");
-        PrinterOperatorDescriptor printer = new PrinterOperatorDescriptor(spec);
-        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID, NC2_ID,NC3_ID,NC4_ID);
-        //PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
+        PrinterOperatorDescriptor printer = new PrinterOperatorDescriptor(spec, "G:\\data\\result");
+        //PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID, NC2_ID,NC3_ID,NC4_ID);
+        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);
 
         IConnectorDescriptor printConn = new OneToOneConnectorDescriptor(spec);
         spec.connect(printConn, cross_grouper, 0, printer, 0);