| Package | Description | 
|---|---|
| org.apache.hadoop.mapreduce | |
| org.apache.hadoop.mapreduce.lib.output | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
Reducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
Reduces a set of intermediate values which share a key to a smaller set of
 values. 
 | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
PartialFileOutputCommitter
An  
OutputCommitter that commits files specified
 in job output directory i.e. | 
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