org.apache.hadoop.hdfs.server.namenode.ha

Class BootstrapStandby

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.ha.BootstrapStandby

All Implemented Interfaces:

Configurable, Tool

@InterfaceAudience.Private
public class BootstrapStandby
extends Object
implements Tool, Configurable

Tool which allows the standby node's storage directories to be bootstrapped by copying the latest namespace snapshot from the active namenode. This is used when first configuring an HA cluster.

Constructor Summary

Constructors

Constructor and Description
BootstrapStandby()

Method Summary

Methods

Modifier and Type	Method and Description
Configuration	getConf() Return the configuration used by this object.
int	run(String[] args) Execute the command with the given arguments.
static int	run(String[] argv, Configuration conf)
void	setConf(Configuration conf) Set the configuration to be used by this object.

Methods inherited from class java.lang.Object

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

Constructor Detail

BootstrapStandby

public BootstrapStandby()

Method Detail

run

public int run(String[] args)
        throws Exception

Description copied from interface: Tool

Execute the command with the given arguments.

Specified by:

run in interface Tool

Parameters:

args - command specific arguments.

Returns:

exit code.

Throws:

Exception

setConf

public void setConf(Configuration conf)

Description copied from interface: Configurable

Set the configuration to be used by this object.

Specified by:

setConf in interface Configurable

getConf

public Configuration getConf()

Description copied from interface: Configurable

Return the configuration used by this object.

Specified by:

getConf in interface Configurable

run

public static int run(String[] argv,
      Configuration conf)
               throws IOException

Throws:

IOException