Package org.apache.hadoop.mapreduce.lib.partition

Class Summary

Class	Description
BinaryPartitioner<V>	Partition BinaryComparable keys using a configurable part of the bytes array returned by BinaryComparable.getBytes().
HashPartitioner<K,V>	Partition keys by their Object.hashCode().
InputSampler<K,V>	Utility for collecting samples and writing a partition file for TotalOrderPartitioner.
KeyFieldBasedComparator<K,V>	This comparator implementation provides a subset of the features provided by the Unix/GNU Sort.
KeyFieldBasedPartitioner<K2,V2>	Defines a way to partition keys based on certain key fields (also see KeyFieldBasedComparator.
RehashPartitioner<K,V>	This partitioner rehashes values returned by Object.hashCode() to get smoother distribution between partitions which may improve reduce reduce time in some cases and should harm things in no cases.
TotalOrderPartitioner<K,V>	Partitioner effecting a total order by reading split points from an externally generated source.