org.apache.hadoop.hbase.mapreduce

Class SampleUploader

java.lang.Object

org.apache.hadoop.hbase.mapreduce.SampleUploader

public class SampleUploader
extends Object

Sample Uploader MapReduce

This is EXAMPLE code. You will need to change it to work for your context.

Uses TableReducer to put the data into HBase. Change the InputFormat to suit your data. In this example, we are importing a CSV file.

row,family,qualifier,value

The table and columnfamily we're to insert into must preexist.

There is no reducer in this example as it is not necessary and adds significant overhead. If you need to do any massaging of data before inserting into HBase, you can do this in the map as well.

Do the following to start the MR job:

 ./bin/hadoop org.apache.hadoop.hbase.mapreduce.SampleUploader /tmp/input.csv TABLE_NAME
 

This code was written against HBase 0.21 trunk.

Constructor Summary

Constructors

Constructor and Description
SampleUploader()

Method Summary

Modifier and Type	Method and Description
static Job	configureJob(Configuration conf, String[] args) Job configuration.
static void	main(String[] args) Main entry point.

Methods inherited from class java.lang.Object

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

Constructor Detail

SampleUploader

public SampleUploader()

Method Detail

configureJob

public static Job configureJob(Configuration conf,
                               String[] args)
                        throws IOException

Job configuration.

Throws:

IOException

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.