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 like creating the initial layout, checking file system status, etc.

Field Summary

Fields

Modifier and Type	Field and Description
static String	HBASE_DIR_PERMS Parameter name for HBase instance root directory permission
static String	HBASE_WAL_DIR_PERMS Parameter name for HBase WAL directory permission

Constructor Summary

Constructors

Constructor and Description
MasterFileSystem(org.apache.hadoop.conf.Configuration conf)

Method Summary

Modifier and Type	Method and Description
void	deleteFamilyFromFS(org.apache.hadoop.fs.Path rootDir, RegionInfo region, byte[] familyName)
void	deleteFamilyFromFS(RegionInfo region, byte[] familyName)
ClusterId	getClusterId()
org.apache.hadoop.conf.Configuration	getConfiguration()
org.apache.hadoop.fs.FileSystem	getFileSystem()
org.apache.hadoop.fs.Path	getRegionDir(RegionInfo region)
org.apache.hadoop.fs.Path	getRootDir()
org.apache.hadoop.fs.Path	getTempDir()
org.apache.hadoop.fs.FileSystem	getWALFileSystem()
org.apache.hadoop.fs.Path	getWALRootDir()
void	logFileSystemState(org.slf4j.Logger log)
static TableDescriptor	setInfoFamilyCachingForMeta(TableDescriptor metaDescriptor, boolean b) Enable in memory caching for hbase:meta
void	stop()

Methods inherited from class java.lang.Object

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

Field Detail

HBASE_DIR_PERMS

public static final String HBASE_DIR_PERMS

Parameter name for HBase instance root directory permission

See Also:

Constant Field Values

HBASE_WAL_DIR_PERMS

public static final String HBASE_WAL_DIR_PERMS

Parameter name for HBase WAL directory permission

See Also:

Constant Field Values

Constructor Detail

MasterFileSystem

public MasterFileSystem(org.apache.hadoop.conf.Configuration conf)
                 throws IOException

Throws:

IOException

Method Detail

getFileSystem

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

getWALFileSystem

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

getConfiguration

public org.apache.hadoop.conf.Configuration getConfiguration()

getRootDir

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

Returns:

HBase root directory.

getWALRootDir

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

Returns:

HBase WAL root directory, usually the same as getRootDir() but can be different if hfiles on one fs and WALs on another. The 'WALs' dir gets made underneath the root dir returned here; i.e. this is '/hbase', not '/hbase/WALs'.

getRegionDir

public org.apache.hadoop.fs.Path getRegionDir(RegionInfo region)

Returns:

the directory for a give region.

getTempDir

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

Returns:

HBase temp dir.

getClusterId

public ClusterId getClusterId()

Returns:

The unique identifier generated for this cluster

setInfoFamilyCachingForMeta

public static TableDescriptor setInfoFamilyCachingForMeta(TableDescriptor metaDescriptor,
                                                          boolean b)

Enable in memory caching for hbase:meta

deleteFamilyFromFS

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

Throws:

IOException

deleteFamilyFromFS

public void deleteFamilyFromFS(org.apache.hadoop.fs.Path rootDir,
                               RegionInfo region,
                               byte[] familyName)
                        throws IOException

Throws:

IOException

stop

public void stop()

logFileSystemState

public void logFileSystemState(org.slf4j.Logger log)
                        throws IOException

Throws:

IOException