diff --git a/.gitignore b/.gitignore
index a9010ba..0517ac2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,6 +12,8 @@
 teststore2
 dev1
 dev2
+dev3
+dev4
 derby.log
 hadoop-conf-tmp
 metastore_db
diff --git a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/NotifyTaskFailureWork.java b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/NotifyTaskFailureWork.java
index f5fb6f8..56379d2 100644
--- a/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/NotifyTaskFailureWork.java
+++ b/hyracks/hyracks-control/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/work/NotifyTaskFailureWork.java
@@ -43,7 +43,7 @@
                 dpm.abortReader(jobId);
             }
             ncs.getClusterController().notifyTaskFailure(jobId, task.getTaskAttemptId(), ncs.getId(), exceptions);
-            exceptions.get(0).printStackTrace();
+            //exceptions.get(0).printStackTrace();
         } catch (Exception e) {
             e.printStackTrace();
         }
diff --git a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/BspUtils.java b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/BspUtils.java
index 8964eb6..ff4ee91 100644
--- a/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/BspUtils.java
+++ b/pregelix/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/util/BspUtils.java
@@ -300,7 +300,7 @@
      * @return User's vertex message value class
      */
     @SuppressWarnings("unchecked")
-    public static <M extends Writable> Class<M> getMessageValueClass(Configuration conf) {
+    public static <M extends WritableSizable> Class<M> getMessageValueClass(Configuration conf) {
         if (conf == null)
             conf = defaultConf;
         return (Class<M>) conf.getClass(PregelixJob.MESSAGE_VALUE_CLASS, Writable.class);
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 73b053f..e8a6b5c 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
@@ -14,8 +14,11 @@
  */
 package edu.uci.ics.pregelix.core.util;
 
+import java.io.File;
 import java.util.EnumSet;
 
+import org.apache.commons.io.FileUtils;
+
 import edu.uci.ics.hyracks.api.client.HyracksConnection;
 import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
 import edu.uci.ics.hyracks.api.job.JobFlag;
@@ -46,6 +49,10 @@
     private static IHyracksClientConnection hcc;
 
     public static void init() throws Exception {
+        FileUtils.forceMkdir(new File("dev1"));
+        FileUtils.forceMkdir(new File("dev2"));
+        FileUtils.forceMkdir(new File("dev3"));
+        FileUtils.forceMkdir(new File("dev4"));
         CCConfig ccConfig = new CCConfig();
         ccConfig.clientNetIpAddress = CC_HOST;
         ccConfig.clusterNetIpAddress = CC_HOST;
@@ -80,7 +87,7 @@
         ncConfig2.datasetIPAddress = "127.0.0.1";
         ncConfig2.nodeId = NC2_ID;
         ncConfig2.appNCMainClass = NCApplicationEntryPoint.class.getName();
-        ncConfig2.ioDevices="dev1,dev2";
+        ncConfig2.ioDevices="dev3,dev4";
         nc2 = new NodeControllerService(ncConfig2);
         nc2.start();
 
diff --git a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/context/RuntimeContext.java b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/context/RuntimeContext.java
index 24a0a9e..e25a46a 100644
--- a/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/context/RuntimeContext.java
+++ b/pregelix/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/context/RuntimeContext.java
@@ -79,7 +79,7 @@
         bufferCache = new BufferCache(appCtx.getRootContext().getIOManager(), allocator, prs,
                 new PreDelayPageCleanerPolicy(Long.MAX_VALUE), fileMapManager, pageSize, numPages, 1000000,
                 threadFactory);
-        int numPagesInMemComponents = numPages / 4;
+        int numPagesInMemComponents = numPages / 8;
         vBufferCache = new MultitenantVirtualBufferCache(new VirtualBufferCache(new HeapBufferAllocator(), pageSize,
                 numPagesInMemComponents));
         ioManager = (IOManager) appCtx.getRootContext().getIOManager();
diff --git a/pregelix/pregelix-example/pom.xml b/pregelix/pregelix-example/pom.xml
index 4629824..fc3f560 100644
--- a/pregelix/pregelix-example/pom.xml
+++ b/pregelix/pregelix-example/pom.xml
@@ -107,6 +107,7 @@
 								<include>expect*</include>
 								<include>ClusterController*</include>
 								<include>edu.uci.*</include>
+								<include>dev*</include>
 							</includes>
 						</fileset>
 					</filesets>
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/MessageOverflowFixedsizeVertex.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/MessageOverflowFixedsizeVertex.java
index 4adde7e..35ba8da 100644
--- a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/MessageOverflowFixedsizeVertex.java
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/MessageOverflowFixedsizeVertex.java
@@ -42,7 +42,7 @@
     private LongWritable outputMsg = new LongWritable(1);
     private Random rand = new Random(System.currentTimeMillis());
     private LongWritable tmpVertexValue = new LongWritable(0);
-    private int numOfMsgClones = 250000;
+    private int numOfMsgClones = 10000;
 
     @Override
     public void compute(Iterator<LongWritable> msgIterator) {
diff --git a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/MessageOverflowVertex.java b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/MessageOverflowVertex.java
index d7248af..7269f5b 100644
--- a/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/MessageOverflowVertex.java
+++ b/pregelix/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/MessageOverflowVertex.java
@@ -41,7 +41,7 @@
     private VLongWritable outputMsg = new VLongWritable(1);
     private Random rand = new Random(System.currentTimeMillis());
     private VLongWritable tmpVertexValue = new VLongWritable(0);
-    private int numOfMsgClones = 250000;
+    private int numOfMsgClones = 10000;
 
     @Override
     public void compute(Iterator<VLongWritable> msgIterator) {
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflow.xml b/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflow.xml
index 4c5cfc0..575e35d 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflow.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflow.xml
@@ -105,7 +105,7 @@
 <property><name>mapred.task.profile.reduces</name><value>0-2</value></property>
 <property><name>webinterface.private.actions</name><value>false</value></property>
 <property><name>hadoop.tmp.dir</name><value>/tmp/hadoop-${user.name}</value></property>
-<property><name>pregelix.framesize</name><value>4096</value></property>
+<property><name>pregelix.framesize</name><value>2048</value></property>
 <property><name>mapred.output.compression.codec</name><value>org.apache.hadoop.io.compress.DefaultCodec</value></property>
 <property><name>mapred.skip.attempts.to.start.skipping</name><value>2</value></property>
 <property><name>mapred.temp.dir</name><value>${hadoop.tmp.dir}/mapred/temp</value></property>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflowFixedsize.xml b/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflowFixedsize.xml
index 10fab63..a894ccd 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflowFixedsize.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflowFixedsize.xml
@@ -104,7 +104,7 @@
 <property><name>mapred.task.profile.reduces</name><value>0-2</value></property>
 <property><name>webinterface.private.actions</name><value>false</value></property>
 <property><name>hadoop.tmp.dir</name><value>/tmp/hadoop-${user.name}</value></property>
-<property><name>pregelix.framesize</name><value>4096</value></property>
+<property><name>pregelix.framesize</name><value>2048</value></property>
 <property><name>mapred.output.compression.codec</name><value>org.apache.hadoop.io.compress.DefaultCodec</value></property>
 <property><name>mapred.skip.attempts.to.start.skipping</name><value>2</value></property>
 <property><name>mapred.temp.dir</name><value>${hadoop.tmp.dir}/mapred/temp</value></property>
diff --git a/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflowLSM.xml b/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflowLSM.xml
index 1998c0e..c98b7da 100644
--- a/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflowLSM.xml
+++ b/pregelix/pregelix-example/src/test/resources/jobs/MessageOverflowLSM.xml
@@ -106,7 +106,7 @@
 <property><name>mapred.task.profile.reduces</name><value>0-2</value></property>
 <property><name>webinterface.private.actions</name><value>false</value></property>
 <property><name>hadoop.tmp.dir</name><value>/tmp/hadoop-${user.name}</value></property>
-<property><name>pregelix.framesize</name><value>4096</value></property>
+<property><name>pregelix.framesize</name><value>2048</value></property>
 <property><name>mapred.output.compression.codec</name><value>org.apache.hadoop.io.compress.DefaultCodec</value></property>
 <property><name>mapred.skip.attempts.to.start.skipping</name><value>2</value></property>
 <property><name>mapred.temp.dir</name><value>${hadoop.tmp.dir}/mapred/temp</value></property>