org.apache.hadoop.hbase.mapred

类 HRegionPartitioner<K2,V2>

java.lang.Object

org.apache.hadoop.hbase.mapred.HRegionPartitioner<K2,V2>

类型参数:

K2 -

V2 -

所有已实现的接口:

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.

构造器概要

构造器

构造器和说明
HRegionPartitioner()

方法概要

方法

限定符和类型	方法和说明
void	configure(org.apache.hadoop.mapred.JobConf job)
int	getPartition(ImmutableBytesWritable key, V2 value, int numPartitions)

从类继承的方法 java.lang.Object

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

构造器详细资料

HRegionPartitioner

public HRegionPartitioner()

方法详细资料

configure

public void configure(org.apache.hadoop.mapred.JobConf job)

指定者:

configure 在接口中 org.apache.hadoop.mapred.JobConfigurable

getPartition

public int getPartition(ImmutableBytesWritable key,
               V2 value,
               int numPartitions)

指定者:

getPartition 在接口中 org.apache.hadoop.mapred.Partitioner<ImmutableBytesWritable,V2>