## 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 `Reducer`s.

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 `Reducer`s.

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

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

Copyright © 2009 The Apache Software Foundation