diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/format/NaiveAlgorithmForPathMergeOutputFormat.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/format/NaiveAlgorithmForPathMergeOutputFormat.java
index 47db449..eea7c1c 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/format/NaiveAlgorithmForPathMergeOutputFormat.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/format/NaiveAlgorithmForPathMergeOutputFormat.java
@@ -8,7 +8,6 @@
 
 import edu.uci.ics.genomix.pregelix.api.io.binary.BinaryVertexOutputFormat;
 import edu.uci.ics.genomix.pregelix.io.ValueStateWritable;
-import edu.uci.ics.genomix.pregelix.operator.NaiveAlgorithmForPathMergeVertex;
 import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.pregelix.api.graph.Vertex;
 import edu.uci.ics.pregelix.api.io.VertexWriter;
diff --git a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/JobGen/JobGenerator.java b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/JobGen/JobGenerator.java
index ca033e6..68e29ee 100644
--- a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/JobGen/JobGenerator.java
+++ b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/JobGen/JobGenerator.java
@@ -4,17 +4,11 @@
 import java.io.FileOutputStream;
 import java.io.IOException;
 
-import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
-import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
-
 import edu.uci.ics.genomix.pregelix.format.LogAlgorithmForPathMergeOutputFormat;
 import edu.uci.ics.genomix.pregelix.format.NaiveAlgorithmForPathMergeInputFormat;
 import edu.uci.ics.genomix.pregelix.format.NaiveAlgorithmForPathMergeOutputFormat;
 import edu.uci.ics.genomix.pregelix.format.LogAlgorithmForPathMergeInputFormat;
 import edu.uci.ics.genomix.pregelix.io.ValueStateWritable;
-import edu.uci.ics.genomix.pregelix.operator.LoadGraphVertex;
-import edu.uci.ics.genomix.pregelix.operator.ThreeStepLogAlgorithmForPathMergeVertex;
 import edu.uci.ics.genomix.pregelix.operator.NaiveAlgorithmForPathMergeVertex;
 import edu.uci.ics.genomix.pregelix.operator.TwoStepLogAlgorithmForPathMergeVertex;
 import edu.uci.ics.genomix.type.KmerBytesWritable;
diff --git a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/pathmerge/GraphBuildTest.java b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/pathmerge/GraphBuildTest.java
index 16fe317..b3ba49d 100644
--- a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/pathmerge/GraphBuildTest.java
+++ b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/pathmerge/GraphBuildTest.java
@@ -26,7 +26,6 @@
 
 import edu.uci.ics.genomix.driver.Driver;
 import edu.uci.ics.genomix.driver.Driver.Plan;
-import edu.uci.ics.genomix.example.jobrun.TestUtils;
 import edu.uci.ics.genomix.job.GenomixJob;
 import edu.uci.ics.genomix.type.KmerBytesWritable;
 import edu.uci.ics.genomix.type.KmerCountValue;
diff --git a/genomix/genomix-pregelix/src/test/resources/cluster/cluster.properties b/genomix/genomix-pregelix/src/test/resources/cluster/cluster.properties
index d0722ce..94eb599 100644
--- a/genomix/genomix-pregelix/src/test/resources/cluster/cluster.properties
+++ b/genomix/genomix-pregelix/src/test/resources/cluster/cluster.properties
@@ -20,13 +20,13 @@
 NCLOGS_DIR=$NCTMP_DIR/logs
 
 #Comma separated I/O directories for the spilling of external sort
-IO_DIRS="/tmp/t3"
+IO_DIRS="/tmp/t3,/tmp/t4"
 
 #The JAVA_HOME
 JAVA_HOME=$JAVA_HOME
 
 #The frame size of the internal dataflow engine
-FRAME_SIZE=65536
+FRAME_SIZE=131072
 
 #CC JAVA_OPTS
 CCJAVA_OPTS="-Xdebug -Xrunjdwp:transport=dt_socket,address=7001,server=y,suspend=n -Xmx3g -Djava.util.logging.config.file=logging.properties"
diff --git a/genomix/genomix-pregelix/src/test/resources/cluster/stores.properties b/genomix/genomix-pregelix/src/test/resources/cluster/stores.properties
index daf881e..04732be 100644
--- a/genomix/genomix-pregelix/src/test/resources/cluster/stores.properties
+++ b/genomix/genomix-pregelix/src/test/resources/cluster/stores.properties
@@ -1 +1 @@
-store=teststore
\ No newline at end of file
+store=teststore1,teststore2
\ No newline at end of file