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:

Closeable, AutoCloseable

@InterfaceAudience.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, storage

Method Summary

Methods

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

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

getBlockPoolID, getClusterID, getEditLog, getLastAppliedOrWrittenTxId, getLastAppliedTxId, getLayoutVersion, getMostRecentCheckpointTxId, getNamespaceID, getStorage, initEditLog, loadEdits, purgeOldStorage, saveDigestAndRenameCheckpointImage, saveFSImageInAllDirs, saveFSImageInAllDirs, saveNamespace, saveNamespace, updateLastAppliedTxIdFromWritten

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 IOException

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

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class FSImage

Throws:

IOException