org.apache.hadoop.hbase.master

Class MasterFileSystem

java.lang.Object

org.apache.hadoop.hbase.master.MasterFileSystem

@InterfaceAudience.Private
public class MasterFileSystem
extends Object

This class abstracts a bunch of operations the HMaster needs to interact with the underlying file system, including splitting log files, checking file system status, etc.

Constructor Summary

Constructors

Constructor and Description
MasterFileSystem(Server master, MasterServices services)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	checkFileSystem() Checks to see if the file system is still accessible.
void	deleteFamilyFromFS(HRegionInfo region, byte[] familyName)
ClusterId	getClusterId()
org.apache.hadoop.fs.FileSystem	getFileSystem()
org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.SplitLogTask.RecoveryMode	getLogRecoveryMode()
org.apache.hadoop.fs.Path	getOldLogDir() Get the directory where old logs go
org.apache.hadoop.fs.Path	getRootDir()
org.apache.hadoop.fs.Path	getTempDir()
void	logFileSystemState(org.apache.commons.logging.Log log)
void	prepareLogReplay(ServerName serverName, Set<HRegionInfo> regions) Mark regions in recovering state when distributedLogReplay are set true
static void	setInfoFamilyCachingForMeta(HTableDescriptor metaDescriptor, boolean b) Enable in memory caching for hbase:meta
void	setLogRecoveryMode() The function is used in SSH to set recovery mode based on configuration after all outstanding log split tasks drained.
void	splitLog(ServerName serverName)
void	splitLog(Set<ServerName> serverNames)
void	splitLog(Set<ServerName> serverNames, org.apache.hadoop.fs.PathFilter filter) This method is the base split method that splits WAL files matching a filter.
void	splitMetaLog(ServerName serverName) Specialized method to handle the splitting for meta WAL
void	splitMetaLog(Set<ServerName> serverNames) Specialized method to handle the splitting for meta WAL
void	stop()

Methods inherited from class java.lang.Object

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

Constructor Detail

MasterFileSystem

public MasterFileSystem(Server master,
                MasterServices services)
                 throws IOException

Throws:

IOException

Method Detail

getFileSystem

public org.apache.hadoop.fs.FileSystem getFileSystem()

getOldLogDir

public org.apache.hadoop.fs.Path getOldLogDir()

Get the directory where old logs go

Returns:

the dir

checkFileSystem

public boolean checkFileSystem()

Checks to see if the file system is still accessible. If not, sets closed

Returns:

false if file system is not available

getRootDir

public org.apache.hadoop.fs.Path getRootDir()

Returns:

HBase root dir.

getTempDir

public org.apache.hadoop.fs.Path getTempDir()

Returns:

HBase temp dir.

getClusterId

public ClusterId getClusterId()

Returns:

The unique identifier generated for this cluster

splitLog

public void splitLog(ServerName serverName)
              throws IOException

Throws:

IOException

splitMetaLog

public void splitMetaLog(ServerName serverName)
                  throws IOException

Specialized method to handle the splitting for meta WAL

Parameters:

serverName -

Throws:

IOException

splitMetaLog

public void splitMetaLog(Set<ServerName> serverNames)
                  throws IOException

Specialized method to handle the splitting for meta WAL

Parameters:

serverNames -

Throws:

IOException

prepareLogReplay

public void prepareLogReplay(ServerName serverName,
                    Set<HRegionInfo> regions)
                      throws IOException

Mark regions in recovering state when distributedLogReplay are set true

Parameters:

serverName - Failed region server whose wals to be replayed

regions - Set of regions to be recovered

Throws:

IOException

splitLog

public void splitLog(Set<ServerName> serverNames)
              throws IOException

Throws:

IOException

splitLog

public void splitLog(Set<ServerName> serverNames,
            org.apache.hadoop.fs.PathFilter filter)
              throws IOException

This method is the base split method that splits WAL files matching a filter. Callers should pass the appropriate filter for meta and non-meta WALs.

Parameters:

serverNames - logs belonging to these servers will be split; this will rename the log directory out from under a soft-failed server

filter -

Throws:

IOException

setInfoFamilyCachingForMeta

public static void setInfoFamilyCachingForMeta(HTableDescriptor metaDescriptor,
                               boolean b)

Enable in memory caching for hbase:meta

deleteFamilyFromFS

public void deleteFamilyFromFS(HRegionInfo region,
                      byte[] familyName)
                        throws IOException

Throws:

IOException

stop

public void stop()

setLogRecoveryMode

public void setLogRecoveryMode()
                        throws IOException

The function is used in SSH to set recovery mode based on configuration after all outstanding log split tasks drained.

Throws:

IOException

getLogRecoveryMode

public org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.SplitLogTask.RecoveryMode getLogRecoveryMode()

logFileSystemState

public void logFileSystemState(org.apache.commons.logging.Log log)
                        throws IOException

Throws:

IOException