org.apache.hadoop.hbase.migration

Class NamespaceUpgrade

java.lang.Object

org.apache.hadoop.hbase.migration.NamespaceUpgrade

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool

public class NamespaceUpgrade
extends Object
implements org.apache.hadoop.util.Tool

Upgrades old 0.94 filesystem layout to namespace layout Does the following: - creates system namespace directory and move .META. table there renaming .META. table to hbase:meta, this in turn would require to re-encode the region directory name

The pre-0.96 paths and dir names are hardcoded in here.

Constructor Summary

Constructors

Constructor and Description
NamespaceUpgrade()

Method Summary

Methods

Modifier and Type	Method and Description
void	deleteRoot() Remove the -ROOT- dir.
org.apache.hadoop.conf.Configuration	getConf()
void	init()
void	makeNamespaceDirs() Create the system and default namespaces dirs
void	migrateACL()
void	migrateDotDirs() Rename all the dot dirs -- .data, .archive, etc.
void	migrateMeta()
void	migrateSnapshots()
void	migrateTables() Migrate all tables into respective namespaces, either default or system.
int	run(String[] args)
void	setConf(org.apache.hadoop.conf.Configuration conf)
void	upgradeTableDirs()
static boolean	verifyNSUpgrade(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path rootDir)

Methods inherited from class java.lang.Object

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

Constructor Detail

NamespaceUpgrade

public NamespaceUpgrade()
                 throws IOException

Throws:

IOException

Method Detail

init

public void init()
          throws IOException

Throws:

IOException

upgradeTableDirs

public void upgradeTableDirs()
                      throws IOException,
                             DeserializationException

Throws:

IOException

DeserializationException

deleteRoot

public void deleteRoot()
                throws IOException

Remove the -ROOT- dir. No longer of use.

Throws:

IOException

migrateDotDirs

public void migrateDotDirs()
                    throws IOException

Rename all the dot dirs -- .data, .archive, etc. -- as data, archive, etc.; i.e. minus the dot.

Throws:

IOException

makeNamespaceDirs

public void makeNamespaceDirs()
                       throws IOException

Create the system and default namespaces dirs

Throws:

IOException

migrateTables

public void migrateTables()
                   throws IOException

Migrate all tables into respective namespaces, either default or system. We put them into a temporary location, '.data', in case a user table is name 'data'. In a later method we will move stuff from .data to data.

Throws:

IOException

migrateSnapshots

public void migrateSnapshots()
                      throws IOException

Throws:

IOException

migrateMeta

public void migrateMeta()
                 throws IOException

Throws:

IOException

migrateACL

public void migrateACL()
                throws IOException

Throws:

IOException

verifyNSUpgrade

public static boolean verifyNSUpgrade(org.apache.hadoop.fs.FileSystem fs,
                      org.apache.hadoop.fs.Path rootDir)
                               throws IOException

Throws:

IOException

run

public int run(String[] args)
        throws Exception

Specified by:

run in interface org.apache.hadoop.util.Tool

Throws:

Exception

setConf

public void setConf(org.apache.hadoop.conf.Configuration conf)

Specified by:

setConf in interface org.apache.hadoop.conf.Configurable

getConf

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

Specified by:

getConf in interface org.apache.hadoop.conf.Configurable