DataByteArrayOutputStream buffer = new DataByteArrayOutputStream(size);
boolean forceToDisk = false;
WriteCommand latest = null;
// Write an empty batch control record.
buffer.reset();
buffer.writeInt(BATCH_CONTROL_RECORD_SIZE);
buffer.writeByte(Location.BATCH_CONTROL_RECORD_TYPE);
buffer.writeInt(0);
buffer.write(BATCH_CONTROL_RECORD_MAGIC);
buffer.writeLong(0);