org.apache.accumulo.core.client.mapreduce.lib.partition
Class RangePartitioner

java.lang.Object
  org.apache.hadoop.mapreduce.Partitioner<org.apache.hadoop.io.Text,org.apache.hadoop.io.Writable>
      org.apache.accumulo.core.client.mapreduce.lib.partition.RangePartitioner

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable

public class RangePartitioner
extends org.apache.hadoop.mapreduce.Partitioner<org.apache.hadoop.io.Text,org.apache.hadoop.io.Writable>
implements org.apache.hadoop.conf.Configurable

Hadoop partitioner that uses ranges, and optionally sub-bins based on hashing.

Constructor Summary

RangePartitioner()

Method Summary

org.apache.hadoop.conf.Configuration	getConf()
int	getPartition(org.apache.hadoop.io.Text key, org.apache.hadoop.io.Writable value, int numPartitions)
void	setConf(org.apache.hadoop.conf.Configuration conf)
static void	setNumSubBins(org.apache.hadoop.mapreduce.JobContext job, int num) Sets the number of random sub-bins per range
static void	setSplitFile(org.apache.hadoop.mapreduce.JobContext job, String file) Sets the hdfs file name to use, containing a newline separated list of Base64 encoded split points that represent ranges for partitioning

Methods inherited from class java.lang.Object

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

Constructor Detail

RangePartitioner

public RangePartitioner()

Method Detail

getPartition

public int getPartition(org.apache.hadoop.io.Text key,
                        org.apache.hadoop.io.Writable value,
                        int numPartitions)

Specified by:

getPartition in class org.apache.hadoop.mapreduce.Partitioner<org.apache.hadoop.io.Text,org.apache.hadoop.io.Writable>

getConf

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

Specified by:

getConf in interface org.apache.hadoop.conf.Configurable

setConf

public void setConf(org.apache.hadoop.conf.Configuration conf)

Specified by:

setConf in interface org.apache.hadoop.conf.Configurable

setSplitFile

public static void setSplitFile(org.apache.hadoop.mapreduce.JobContext job,
                                String file)

Sets the hdfs file name to use, containing a newline separated list of Base64 encoded split points that represent ranges for partitioning

setNumSubBins

public static void setNumSubBins(org.apache.hadoop.mapreduce.JobContext job,
                                 int num)

Sets the number of random sub-bins per range