org.apache.hadoop.hdfs.server.namenode
Class BackupStorage

java.lang.Object
  extended by org.apache.hadoop.hdfs.server.common.StorageInfo
      extended by org.apache.hadoop.hdfs.server.common.Storage
          extended by org.apache.hadoop.hdfs.server.namenode.FSImage
              extended by org.apache.hadoop.hdfs.server.namenode.BackupStorage
All Implemented Interfaces:
org.apache.hadoop.io.Writable

@InterfaceAudience.Private
public class BackupStorage
extends FSImage


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.hdfs.server.common.Storage
Storage.StorageDirectory, Storage.StorageDirType, Storage.StorageState
 
Field Summary
 
Fields inherited from class org.apache.hadoop.hdfs.server.namenode.FSImage
checkpointTime, ckptState, editLog, namesystem, removedStorageDirs
 
Fields inherited from class org.apache.hadoop.hdfs.server.common.Storage
LAST_PRE_UPGRADE_LAYOUT_VERSION, LAST_UPGRADABLE_HADOOP_VERSION, LAST_UPGRADABLE_LAYOUT_VERSION, LOG, PRE_GENERATIONSTAMP_LAYOUT_VERSION, PRE_RBW_LAYOUT_VERSION, STORAGE_DIR_CURRENT, STORAGE_FILE_VERSION, storageDirs
 
Fields inherited from class org.apache.hadoop.hdfs.server.common.StorageInfo
cTime, layoutVersion, namespaceID
 
Method Summary
 boolean isConversionNeeded(Storage.StorageDirectory sd)
           
 
Methods inherited from class org.apache.hadoop.hdfs.server.namenode.FSImage
corruptPreUpgradeStorage, format, getEditLog, getFields, getFsEditName, getFSNamesystem, getRestoreFailedStorage, moveCurrent, moveLastCheckpoint, readBytes, readString, saveCurrent, setFields, setRestoreFailedStorage
 
Methods inherited from class org.apache.hadoop.hdfs.server.common.Storage
addStorageDir, checkVersionUpgradable, deleteDir, dirIterator, dirIterator, getBuildVersion, getNumStorageDirs, getRegistrationID, getStorageDir, isLockSupported, listStorageDirectories, rename, unlockAll, writeAll, writeCorruptedData
 
Methods inherited from class org.apache.hadoop.hdfs.server.common.StorageInfo
getCTime, getLayoutVersion, getNamespaceID, readFields, setStorageInfo, write
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Method Detail

isConversionNeeded

public boolean isConversionNeeded(Storage.StorageDirectory sd)
Overrides:
isConversionNeeded in class FSImage


Copyright © 2009 The Apache Software Foundation