Package org.apache.hadoop.hbase.backup.mapreduce

Class MapReduceHFileSplitterJob

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.hbase.backup.mapreduce.MapReduceHFileSplitterJob

All Implemented Interfaces:

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

@Private
public class MapReduceHFileSplitterJob
extends org.apache.hadoop.conf.Configured
implements org.apache.hadoop.util.Tool

A tool to split HFiles into new region boundaries as a MapReduce job. The tool generates HFiles for later bulk importing.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static class	MapReduceHFileSplitterJob.HFileCellMapper	A mapper that just writes out cells.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	BULK_OUTPUT_CONF_KEY
private static final String	JOB_NAME_CONF_KEY
private static final org.slf4j.Logger	LOG
(package private) static final String	NAME
static final String	TABLE_MAP_KEY
static final String	TABLES_KEY

Constructor Summary

Constructors

Modifier	Constructor	Description
	MapReduceHFileSplitterJob()
protected	MapReduceHFileSplitterJob(org.apache.hadoop.conf.Configuration c)

Method Summary

Modifier and Type	Method	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)
private void	usage(String errorMsg)	Print usage

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

Field Details

LOG

private static final org.slf4j.Logger LOG

NAME

static final String NAME

See Also:

• Constant Field Values

BULK_OUTPUT_CONF_KEY

public static final String BULK_OUTPUT_CONF_KEY

See Also:

• Constant Field Values

TABLES_KEY

public static final String TABLES_KEY

See Also:

• Constant Field Values

TABLE_MAP_KEY

public static final String TABLE_MAP_KEY

See Also:

• Constant Field Values

JOB_NAME_CONF_KEY

private static final String JOB_NAME_CONF_KEY

See Also:

• Constant Field Values

Constructor Details

MapReduceHFileSplitterJob

public MapReduceHFileSplitterJob()

MapReduceHFileSplitterJob

protected MapReduceHFileSplitterJob(org.apache.hadoop.conf.Configuration c)

Method Details

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.

usage

private void usage(String errorMsg)

Print usage

Parameters:

errorMsg - Error message. Can be null.

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