diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogRecord.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogRecord.java
index 3068867..b9baa3b 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogRecord.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogRecord.java
@@ -22,7 +22,7 @@
 
     public static final int JOB_TERMINATE_LOG_SIZE = 13; //JOB_COMMIT or ABORT log type
     public static final int ENTITY_COMMIT_LOG_BASE_SIZE = 25;
-    public static final int UPDATE_LOG_BASE_SIZE = 60;
+    public static final int UPDATE_LOG_BASE_SIZE = 54;
 
     public boolean readLogRecord(ByteBuffer buffer);
 
@@ -65,10 +65,6 @@
 
     public void setResourceId(long resourceId);
 
-    public byte getResourceType();
-
-    public void setResourceType(byte resourceType);
-
     public int getLogSize();
 
     public void setLogSize(int logSize);
@@ -85,18 +81,6 @@
 
     public void setNewValue(ITupleReference newValue);
 
-    public byte getOldOp();
-
-    public void setOldOp(byte oldOp);
-
-    public int getOldValueSize();
-
-    public void setOldValueSize(int oldValueSize);
-
-    public ITupleReference getOldValue();
-
-    public void setOldValue(ITupleReference oldValue);
-
     public long getChecksum();
 
     public void setChecksum(long checksum);
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/AbstractIndexModificationOperationCallback.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/AbstractIndexModificationOperationCallback.java
index 031a26e..cba690d 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/AbstractIndexModificationOperationCallback.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/AbstractIndexModificationOperationCallback.java
@@ -51,11 +51,10 @@
         logRecord.setJobId(txnCtx.getJobId().getId());
         logRecord.setDatasetId(datasetId);
         logRecord.setResourceId(resourceId);
-        logRecord.setResourceType(resourceType);
         logRecord.setNewOp((byte) (indexOp.ordinal()));
     }
 
-    protected void log(int PKHash, ITupleReference newValue, IndexOperation oldOp, ITupleReference oldValue)
+    protected void log(int PKHash, ITupleReference newValue)
             throws ACIDException {
         logRecord.setPKHashValue(PKHash);
         logRecord.setPKFields(primaryKeyFields);
@@ -67,15 +66,6 @@
         } else {
             logRecord.setNewValueSize(0);
         }
-        if (resourceType == ResourceType.LSM_BTREE) {
-            logRecord.setOldOp((byte) (oldOp.ordinal()));
-            if (oldValue != null) {
-                logRecord.setOldValueSize(tupleWriter.bytesRequired(oldValue));
-                logRecord.setOldValue(oldValue);
-            } else {
-                logRecord.setOldValueSize(0);
-            }
-        }
         logRecord.computeAndSetLogSize();
         txnSubsystem.getLogManager().log(logRecord);
     }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexModificationOperationCallback.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexModificationOperationCallback.java
index 44dcad8..4dc4a10 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexModificationOperationCallback.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexModificationOperationCallback.java
@@ -24,7 +24,6 @@
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
-import edu.uci.ics.hyracks.storage.am.lsm.btree.tuples.LSMBTreeTupleReference;
 
 /**
  * Assumes LSM-BTrees as primary indexes.
@@ -53,15 +52,7 @@
     public void found(ITupleReference before, ITupleReference after) throws HyracksDataException {
         try {
             int pkHash = computePrimaryKeyHashValue(after, primaryKeyFields);
-            LSMBTreeTupleReference lsmBTreeTuple = (LSMBTreeTupleReference) before;
-            IndexOperation oldOp = IndexOperation.INSERT;
-            if (before == null) {
-                oldOp = IndexOperation.NOOP;
-            }
-            if (lsmBTreeTuple != null && lsmBTreeTuple.isAntimatter()) {
-                oldOp = IndexOperation.DELETE;
-            }
-            log(pkHash, after, oldOp, before);
+            log(pkHash, after);
         } catch (ACIDException e) {
             throw new HyracksDataException(e);
         }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexModificationOperationCallback.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexModificationOperationCallback.java
index ef5ad21..e60501a 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexModificationOperationCallback.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexModificationOperationCallback.java
@@ -17,14 +17,12 @@
 
 import edu.uci.ics.asterix.common.exceptions.ACIDException;
 import edu.uci.ics.asterix.common.transactions.ILockManager;
-import edu.uci.ics.asterix.common.transactions.IRecoveryManager.ResourceType;
 import edu.uci.ics.asterix.common.transactions.ITransactionContext;
 import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
-import edu.uci.ics.hyracks.storage.am.lsm.btree.tuples.LSMBTreeTupleReference;
 
 /**
  * Secondary-index modifications do not require any locking.
@@ -52,20 +50,7 @@
     public void found(ITupleReference before, ITupleReference after) throws HyracksDataException {
         try {
             int pkHash = computePrimaryKeyHashValue(after, primaryKeyFields);
-            IndexOperation effectiveOldOp;
-            if (resourceType == ResourceType.LSM_BTREE) {
-                LSMBTreeTupleReference lsmBTreeTuple = (LSMBTreeTupleReference) before;
-                if (before == null) {
-                    effectiveOldOp = IndexOperation.NOOP;
-                } else if (lsmBTreeTuple != null && lsmBTreeTuple.isAntimatter()) {
-                    effectiveOldOp = IndexOperation.DELETE;
-                } else {
-                    effectiveOldOp = IndexOperation.INSERT;
-                }
-            } else {
-                effectiveOldOp = oldOp;
-            }
-            this.log(pkHash, after, effectiveOldOp, before);
+            this.log(pkHash, after);
         } catch (ACIDException e) {
             throw new HyracksDataException(e);
         }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogRecord.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogRecord.java
index dd81df7..1337e33 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogRecord.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogRecord.java
@@ -40,10 +40,9 @@
  * PKValueSize(4)
  * PKValue(PKValueSize)
  * ---------------------------
- * [Header3] (21 bytes) : only for update log type
+ * [Header3] (20 bytes) : only for update log type
  * PrevLSN(8)
  * ResourceId(8) //stored in .metadata of the corresponding index in NC node
- * ResourceType(1)
  * LogRecordSize(4)
  * ---------------------------
  * [Body] (Variable size) : only for update log type
@@ -51,9 +50,6 @@
  * NewOp(1)
  * NewValueSize(4)
  * NewValue(NewValueSize)
- * OldOp(1)
- * OldValueSize(4)
- * OldValue(OldValueSize)
  * ---------------------------
  * [Tail] (8 bytes) : for all log types
  * Checksum(8)
@@ -62,8 +58,8 @@
  * 1) JOB_COMMIT_LOG_SIZE: 13 bytes (5 + 8)
  * 2) ENTITY_COMMIT: 25 + PKSize (5 + 12 + PKSize + 8)
  *    --> ENTITY_COMMIT_LOG_BASE_SIZE = 25
- * 3) UPDATE: 64 + PKSize + New/OldValueSize (5 + 12 + PKSize + 21 + 14 + New/OldValueSize + 8)
- *    --> UPDATE_LOG_BASE_SIZE = 60
+ * 3) UPDATE: 54 + PKValueSize + NewValueSize (5 + 12 + PKValueSize + 20 + 9 + NewValueSize + 8)
+ *    --> UPDATE_LOG_BASE_SIZE = 54
  */
 public class LogRecord implements ILogRecord {
 
@@ -76,15 +72,11 @@
     private ITupleReference PKValue;
     private long prevLSN;
     private long resourceId;
-    private byte resourceType;
     private int logSize;
     private int fieldCnt;
     private byte newOp;
     private int newValueSize;
     private ITupleReference newValue;
-    private byte oldOp;
-    private int oldValueSize;
-    private ITupleReference oldValue;
     private long checksum;
     //------------- fields in a log record (end) --------------//
 
@@ -96,7 +88,6 @@
     private final SimpleTupleWriter tupleWriter;
     private final PrimaryKeyTupleReference readPKValue;
     private final SimpleTupleReference readNewValue;
-    private final SimpleTupleReference readOldValue;
     private final CRC32 checksumGen;
     private int[] PKFields;
 
@@ -105,7 +96,6 @@
         tupleWriter = new SimpleTupleWriter();
         readPKValue = new PrimaryKeyTupleReference();
         readNewValue = (SimpleTupleReference) tupleWriter.createTupleReference();
-        readOldValue = (SimpleTupleReference) tupleWriter.createTupleReference();
         checksumGen = new CRC32();
     }
 
@@ -126,21 +116,11 @@
         if (logType == LogType.UPDATE) {
             buffer.putLong(prevLSN);
             buffer.putLong(resourceId);
-            buffer.put(resourceType);
             buffer.putInt(logSize);
             buffer.putInt(fieldCnt);
             buffer.put(newOp);
             buffer.putInt(newValueSize);
             writeTuple(buffer, newValue, newValueSize);
-            if (resourceType == ResourceType.LSM_BTREE) {
-                buffer.put(oldOp);
-                if (oldOp != (byte) (IndexOperation.NOOP.ordinal())) {
-                    buffer.putInt(oldValueSize);
-                    if (oldValueSize > 0) {
-                        writeTuple(buffer, oldValue, oldValueSize);
-                    }
-                }
-            }
         }
         checksum = generateChecksum(buffer, beginOffset, logSize - CHECKSUM_SIZE);
         buffer.putLong(checksum);
@@ -186,21 +166,11 @@
             if (logType == LogType.UPDATE) {
                 prevLSN = buffer.getLong();
                 resourceId = buffer.getLong();
-                resourceType = buffer.get();
                 logSize = buffer.getInt();
                 fieldCnt = buffer.getInt();
                 newOp = buffer.get();
                 newValueSize = buffer.getInt();
                 newValue = readTuple(buffer, readNewValue, fieldCnt, newValueSize);
-                if (resourceType == ResourceType.LSM_BTREE) {
-                    oldOp = buffer.get();
-                    if (oldOp != (byte) (IndexOperation.NOOP.ordinal())) {
-                        oldValueSize = buffer.getInt();
-                        if (oldValueSize > 0) {
-                            oldValue = readTuple(buffer, readOldValue, fieldCnt, oldValueSize);
-                        }
-                    }
-                }
             } else {
                 computeAndSetLogSize();
             }
@@ -269,14 +239,7 @@
     }
 
     private void setUpdateLogSize() {
-        logSize = UPDATE_LOG_BASE_SIZE + PKValueSize + newValueSize + oldValueSize;
-        if (resourceType != ResourceType.LSM_BTREE) {
-            logSize -= 5; //oldOp(byte: 1) + oldValueLength(int: 4)
-        } else {
-            if (oldOp == (byte) (IndexOperation.NOOP.ordinal())) {
-                logSize -= 4; //oldValueLength(int: 4)
-            }
-        }
+        logSize = UPDATE_LOG_BASE_SIZE + PKValueSize + newValueSize;
     }
 
     @Override
@@ -313,7 +276,6 @@
         if (logType == LogType.UPDATE) {
             builder.append(" PrevLSN : ").append(prevLSN);
             builder.append(" ResourceId : ").append(resourceId);
-            builder.append(" ResourceType : ").append(resourceType);
         }
         return builder.toString();
     }
@@ -403,16 +365,6 @@
     }
 
     @Override
-    public byte getResourceType() {
-        return resourceType;
-    }
-
-    @Override
-    public void setResourceType(byte resourceType) {
-        this.resourceType = resourceType;
-    }
-
-    @Override
     public int getLogSize() {
         return logSize;
     }
@@ -454,36 +406,6 @@
     }
 
     @Override
-    public byte getOldOp() {
-        return oldOp;
-    }
-
-    @Override
-    public void setOldOp(byte oldOp) {
-        this.oldOp = oldOp;
-    }
-
-    @Override
-    public int getOldValueSize() {
-        return oldValueSize;
-    }
-
-    @Override
-    public void setOldValueSize(int oldValueSize) {
-        this.oldValueSize = oldValueSize;
-    }
-
-    @Override
-    public ITupleReference getOldValue() {
-        return oldValue;
-    }
-
-    @Override
-    public void setOldValue(ITupleReference oldValue) {
-        this.oldValue = oldValue;
-    }
-
-    @Override
     public long getChecksum() {
         return checksum;
     }