org.apache.hadoop.hbase.util

类 RegionMover

java.lang.Object

org.apache.hadoop.hbase.util.AbstractHBaseTool

org.apache.hadoop.hbase.util.RegionMover

所有已实现的接口:

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

@InterfaceAudience.Public
public class RegionMover
extends AbstractHBaseTool
implements Closeable

Tool for loading/unloading regions to/from given regionserver This tool can be run from Command line directly as a utility. Supports Ack/No Ack mode for loading/unloading operations.Ack mode acknowledges if regions are online after movement while noAck mode is best effort mode that improves performance but will still move on if region is stuck/not moved. Motivation behind noAck mode being RS shutdown where even if a Region is stuck, upon shutdown master will move it anyways. This can also be used by constructiong an Object using the builder and then calling load() or unload() methods for the desired operations.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	RegionMover.RegionMoverBuilder Builder for Region mover.

字段概要

字段

限定符和类型	字段和说明
static int	DEFAULT_MOVE_RETRIES_MAX
static int	DEFAULT_MOVE_WAIT_MAX
static int	DEFAULT_SERVERSTART_WAIT_MAX
static String	MOVE_RETRIES_MAX_KEY
static String	MOVE_WAIT_MAX_KEY
static String	SERVERSTART_WAIT_MAX_KEY

从类继承的字段 org.apache.hadoop.hbase.util.AbstractHBaseTool

cmdLineArgs, conf, EXIT_FAILURE, EXIT_SUCCESS, LONG_HELP_OPTION, options, SHORT_HELP_OPTION

方法概要

限定符和类型	方法和说明
protected void	addOptions()
void	close()
protected int	doWork()
boolean	load() Loads the specified hostname with regions listed in the filename RegionMover Object has to be created using RegionMover(RegionMoverBuilder)
static void	main(String[] args)
protected void	processOptions(org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine cmd)
boolean	unload() Unload regions from given hostname using ack/noAck mode and maxthreads.In noAck mode we do not make sure that region is successfully online on the target region server,hence it is best effort.We do not unload regions to hostnames given in excludeFile.

从类继承的方法 org.apache.hadoop.hbase.util.AbstractHBaseTool

addOption, addOptNoArg, addOptNoArg, addOptWithArg, addOptWithArg, addRequiredOption, addRequiredOptWithArg, addRequiredOptWithArg, doStaticMain, getConf, getOptionAsDouble, getOptionAsInt, getOptionAsLong, newParser, parseArgs, parseInt, parseLong, printUsage, printUsage, processOldArgs, run, setConf

从类继承的方法 java.lang.Object

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

字段详细资料

MOVE_RETRIES_MAX_KEY

public static final String MOVE_RETRIES_MAX_KEY

另请参阅:

常量字段值

MOVE_WAIT_MAX_KEY

public static final String MOVE_WAIT_MAX_KEY

另请参阅:

常量字段值

SERVERSTART_WAIT_MAX_KEY

public static final String SERVERSTART_WAIT_MAX_KEY

另请参阅:

常量字段值

DEFAULT_MOVE_RETRIES_MAX

public static final int DEFAULT_MOVE_RETRIES_MAX

另请参阅:

常量字段值

DEFAULT_MOVE_WAIT_MAX

public static final int DEFAULT_MOVE_WAIT_MAX

另请参阅:

常量字段值

DEFAULT_SERVERSTART_WAIT_MAX

public static final int DEFAULT_SERVERSTART_WAIT_MAX

另请参阅:

常量字段值

方法详细资料

close

public void close()

指定者:

close 在接口中 Closeable

指定者:

close 在接口中 AutoCloseable

load

public boolean load()
             throws ExecutionException,
                    InterruptedException,
                    TimeoutException

Loads the specified hostname with regions listed in the filename RegionMover Object has to be created using RegionMover(RegionMoverBuilder)

返回:

true if loading succeeded, false otherwise

抛出:

ExecutionException

InterruptedException

TimeoutException

unload

public boolean unload()
               throws InterruptedException,
                      ExecutionException,
                      TimeoutException

Unload regions from given hostname using ack/noAck mode and maxthreads.In noAck mode we do not make sure that region is successfully online on the target region server,hence it is best effort.We do not unload regions to hostnames given in excludeFile.

返回:

true if unloading succeeded, false otherwise

抛出:

InterruptedException

ExecutionException

TimeoutException

addOptions

protected void addOptions()

指定者:

addOptions 在类中 AbstractHBaseTool

processOptions

protected void processOptions(org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine cmd)

指定者:

processOptions 在类中 AbstractHBaseTool

doWork

protected int doWork()
              throws Exception

指定者:

doWork 在类中 AbstractHBaseTool

抛出:

Exception

main

public static void main(String[] args)