HRegionPartitioner (Apache HBase 1.2.12 API)

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java.lang.Object
- org.apache.hadoop.hbase.mapred.HRegionPartitioner<K2,V2>

Type Parameters:
K2 -
V2 -

All Implemented Interfaces:

org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Partitioner<ImmutableBytesWritable,V2>
```
@InterfaceAudience.Public
@InterfaceStability.Stable
public class HRegionPartitioner<K2,V2>
extends Object
implements org.apache.hadoop.mapred.Partitioner<ImmutableBytesWritable,V2>
```
This is used to partition the output keys into groups of keys. Keys are grouped according to the regions that currently exist so that each reducer fills a single region so load is distributed.

Constructor Summary

Constructors
Constructor and Description

HRegionPartitioner()

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`configure(org.apache.hadoop.mapred.JobConf job)`
`int`	`getPartition(ImmutableBytesWritable key, V2 value, int numPartitions)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - HRegionPartitioner
```
public HRegionPartitioner()
```
- Method Detail
  - configure
```
public void configure(org.apache.hadoop.mapred.JobConf job)
```
    Specified by:
    
    configure in interface org.apache.hadoop.mapred.JobConfigurable
  - getPartition
```
public int getPartition(ImmutableBytesWritable key,
               V2 value,
               int numPartitions)
```
    Specified by:
    
    getPartition in interface org.apache.hadoop.mapred.Partitioner<ImmutableBytesWritable,V2>

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