Package org.apache.hadoop.hdfs.server.namenode

Class BackupImage

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.FSImage

org.apache.hadoop.hdfs.server.namenode.BackupImage

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

@Private
public class BackupImage
extends FSImage

Extension of FSImage for the backup node. This class handles the setup of the journaling spool on the backup namenode.

Field Summary

Fields inherited from class org.apache.hadoop.hdfs.server.namenode.FSImage

archivalManager, editLog, lastAppliedTxId, LOG, SHUTDOWN_HOOK_PRIORITY, storage

Method Summary

Modifier and Type	Method	Description
void	close()	Override close() so that we don't finalize edit logs.

Methods inherited from class org.apache.hadoop.hdfs.server.namenode.FSImage

addToCheckpointing, checkUpgrade, getBlockPoolID, getClusterID, getCorrectLastAppliedOrWrittenTxId, getEditLog, getLastAppliedOrWrittenTxId, getLastAppliedTxId, getLayoutVersion, getMostRecentCheckpointTxId, getNamespaceID, getStorage, hasRollbackFSImage, initEditLog, loadEdits, loadEdits, recoverStorageDirs, removeFromCheckpointing, saveDigestAndRenameCheckpointImage, saveFSImageInAllDirs, saveLegacyOIVImage, saveNamespace, saveNamespace, saveNamespace, updateLastAppliedTxIdFromWritten, updateStorageVersion

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

close

public void close()
           throws java.io.IOException

Override close() so that we don't finalize edit logs.

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable

Overrides:

close in class FSImage

Throws:

java.io.IOException