Uses of Interface
org.apache.hadoop.mapred.Partitioner

Packages that use Partitioner

org.apache.hadoop.contrib.index.mapred
org.apache.hadoop.examples	Hadoop example code.
org.apache.hadoop.mapred	A software framework for easily writing applications which process vast amounts of data (multi-terabyte data-sets) parallelly on large clusters (thousands of nodes) built of commodity hardware in a reliable, fault-tolerant manner.
org.apache.hadoop.mapred.lib	Library of generally useful mappers, reducers, and partitioners.

Uses of Partitioner in org.apache.hadoop.contrib.index.mapred

Classes in org.apache.hadoop.contrib.index.mapred that implement Partitioner

class

IndexUpdatePartitioner This partitioner class puts the values of the same key - in this case the same shard - in the same partition.

Uses of Partitioner in org.apache.hadoop.examples

Classes in org.apache.hadoop.examples that implement Partitioner

class

SleepJob Dummy class for testing MR framefork.

Uses of Partitioner in org.apache.hadoop.mapred

Methods in org.apache.hadoop.mapred that return types with arguments of type Partitioner

Class<? extends Partitioner>

JobConf.getPartitionerClass() Get the Partitioner used to partition Mapper-outputs to be sent to the Reducers.

Methods in org.apache.hadoop.mapred with parameters of type Partitioner

static <K extends WritableComparable,V extends Writable> Writable

MapFileOutputFormat.getEntry(MapFile.Reader[] readers, Partitioner<K,V> partitioner, K key, V value) Get an entry from output generated by this class.

Method parameters in org.apache.hadoop.mapred with type arguments of type Partitioner

void	JobConf.setPartitionerClass(Class<? extends Partitioner> theClass) Set the Partitioner class used to partition Mapper-outputs to be sent to the Reducers.

Uses of Partitioner in org.apache.hadoop.mapred.lib

Classes in org.apache.hadoop.mapred.lib that implement Partitioner

class	BinaryPartitioner<V> Partition BinaryComparable keys using a configurable part of the bytes array returned by BinaryComparable.getBytes().
class	HashPartitioner<K2,V2> Partition keys by their Object.hashCode().
class	KeyFieldBasedPartitioner<K2,V2> Defines a way to partition keys based on certain key fields (also see KeyFieldBasedComparator.
class	TotalOrderPartitioner<K extends WritableComparable,V> Partitioner effecting a total order by reading split points from an externally generated source.