| Class | Description |
|---|---|
| AndReduce |
ReduceOperation for calculating the AND function over boolean values.
|
| KryoWrappedReduceOperation<S,R> |
Reduce operation which wraps reduced value in KryoWritableWrapper,
so we don't need to worry about it being writable
|
| LongXorReduce |
ReduceOperation that XORs (^) values together.
|
| MaxPairReducer<L extends org.apache.hadoop.io.Writable,R extends org.apache.hadoop.io.WritableComparable> |
Aggregating PairWritable<L, R>, by taking pair with
largest second value.
|
| MaxReduce<T extends org.apache.hadoop.io.WritableComparable> |
Reducer for calculating max of values
|
| MinReduce<T extends org.apache.hadoop.io.WritableComparable> |
Reducer for calculating min of values
|
| OrReduce |
ReduceOperation for calculating the OR function over boolean values.
|
| PairReduce<S1,R1 extends org.apache.hadoop.io.Writable,S2,R2 extends org.apache.hadoop.io.Writable> |
Combines two individual reducers, to create a single reducer of pairs that
reduces each of them individually.
|
| SumReduce<T extends org.apache.hadoop.io.Writable> |
Reducer for calculating sum of values
|
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