| Interface | Description | 
|---|---|
| Partitioner | 
 This interface represents the way of partitioning output data from a source task. 
 | 
| Class | Description | 
|---|---|
| DataSkewHashPartitioner | 
 An implementation of  
Partitioner which hashes output data from a source task appropriate to detect data skew. | 
| HashPartitioner | 
 An implementation of  
Partitioner which hashes output data from a source task
 according to the key of elements. | 
| IntactPartitioner | 
 An implementation of  
Partitioner which makes an output data
 from a source task to a single Partition. | 
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