| Package | Description | 
|---|---|
| org.apache.hadoop.mapred.lib | 
| Class and Description | 
|---|
| BinaryPartitioner Partition  BinaryComparablekeys using a configurable part of 
 the bytes array returned byBinaryComparable.getBytes(). | 
| InputSampler Utility for collecting samples and writing a partition file for
  TotalOrderPartitioner. | 
| KeyFieldBasedComparator This comparator implementation provides a subset of the features provided
 by the Unix/GNU Sort. | 
| KeyFieldBasedPartitioner Defines a way to partition keys based on certain key fields (also see
   KeyFieldBasedComparator. | 
| TotalOrderPartitioner Partitioner effecting a total order by reading split points from
 an externally generated source. | 
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