org.apache.hadoop.hbase.mapreduce

Class WALPlayer

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.hbase.mapreduce.WALPlayer

All Implemented Interfaces:

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

@InterfaceAudience.Public
@InterfaceStability.Stable
public class WALPlayer
extends org.apache.hadoop.conf.Configured
implements org.apache.hadoop.util.Tool

A tool to replay WAL files as a M/R job. The WAL can be replayed for a set of tables or all tables, and a timerange can be provided (in milliseconds). The WAL is filtered to the passed set of tables and the output can optionally be mapped to another set of tables. WAL replay can also generate HFiles for later bulk importing, in that case the WAL is replayed for a single table only.

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
org.apache.hadoop.mapreduce.Job	createSubmittableJob(String[] args) Sets up the actual job.
static void	main(String[] args) Main entry point.
int	run(String[] args)

Methods inherited from class org.apache.hadoop.conf.Configured

getConf, setConf

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.conf.Configurable

getConf, setConf

Constructor Detail

WALPlayer

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

Parameters:

conf - The Configuration to use.

Method Detail

createSubmittableJob

public org.apache.hadoop.mapreduce.Job createSubmittableJob(String[] args)
                                                     throws IOException

Sets up the actual job.

Parameters:

args - The command line parameters.

Returns:

The newly created job.

Throws:

IOException - When setting up the job fails.

main

public static void main(String[] args)
                 throws Exception

Main entry point.

Parameters:

args - The command line parameters.

Throws:

Exception - When running the job fails.

run

public int run(String[] args)
        throws Exception

Specified by:

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

Throws:

Exception