org.apache.hadoop.mapred.lib

Class TotalOrderPartitioner<K extends org.apache.hadoop.io.WritableComparable<?>,V>

java.lang.Object

org.apache.hadoop.mapreduce.Partitioner<K,V>

org.apache.hadoop.mapreduce.lib.partition.TotalOrderPartitioner<K,V>

org.apache.hadoop.mapred.lib.TotalOrderPartitioner<K,V>

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, JobConfigurable, Partitioner<K,V>

@InterfaceAudience.Public
 @InterfaceStability.Stable
public class TotalOrderPartitioner<K extends org.apache.hadoop.io.WritableComparable<?>,V>
extends TotalOrderPartitioner<K,V>
implements Partitioner<K,V>

Partitioner effecting a total order by reading split points from an externally generated source.

Field Summary

Fields inherited from class org.apache.hadoop.mapreduce.lib.partition.TotalOrderPartitioner

DEFAULT_PATH, MAX_TRIE_DEPTH, NATURAL_ORDER, PARTITIONER_PATH

Constructor Summary

Constructors

Constructor and Description
TotalOrderPartitioner()

Method Summary

Modifier and Type	Method and Description
void	configure(JobConf job) Initializes a new instance from a JobConf.
static String	getPartitionFile(JobConf job) Deprecated. Use TotalOrderPartitioner.getPartitionFile(Configuration) instead
static void	setPartitionFile(JobConf job, org.apache.hadoop.fs.Path p) Deprecated. Use TotalOrderPartitioner.setPartitionFile(Configuration, Path) instead

Methods inherited from class org.apache.hadoop.mapreduce.lib.partition.TotalOrderPartitioner

getConf, getPartition, getPartitionFile, setConf, setPartitionFile

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.mapred.Partitioner

getPartition

Constructor Detail

TotalOrderPartitioner

public TotalOrderPartitioner()

Method Detail

configure

public void configure(JobConf job)

Description copied from interface: JobConfigurable

Initializes a new instance from a JobConf.

Specified by:

configure in interface JobConfigurable

Parameters:

job - the configuration

setPartitionFile

@Deprecated
public static void setPartitionFile(JobConf job,
                                                org.apache.hadoop.fs.Path p)

Deprecated. Use TotalOrderPartitioner.setPartitionFile(Configuration, Path) instead

Set the path to the SequenceFile storing the sorted partition keyset. It must be the case that for R reduces, there are R-1 keys in the SequenceFile.

getPartitionFile

@Deprecated
public static String getPartitionFile(JobConf job)

Deprecated. Use TotalOrderPartitioner.getPartitionFile(Configuration) instead

Get the path to the SequenceFile storing the sorted partition keyset.

See Also:

setPartitionFile(JobConf,Path)