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Packages that use Reducer | |
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org.apache.hadoop.abacus | Hadoop based Abacus is a specialization of map/reduce framework, specilizing for performing various counting and aggregations. |
org.apache.hadoop.benchmarks.mapred | |
org.apache.hadoop.examples | Hadoop example code. |
org.apache.hadoop.mapred.lib | Library of generally useful mappers, reducers, and partitioners. |
org.apache.hadoop.streaming |
Uses of Reducer in org.apache.hadoop.abacus |
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Classes in org.apache.hadoop.abacus that implement Reducer | |
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class |
JobBase
A common base implementing some statics collecting mechanisms that are commonly used in a typical map/reduce job. |
class |
ValueAggregatorCombiner
This class implements the generic combiner of Abacus. |
class |
ValueAggregatorJobBase
This abstract class implements some common functionalities of the the generic mapper, reducer and combiner classes of Abacus. |
class |
ValueAggregatorMapper
This class implements the generic mapper of Abacus. |
class |
ValueAggregatorReducer
This class implements the generic reducer of Abacus. |
Uses of Reducer in org.apache.hadoop.benchmarks.mapred |
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Classes in org.apache.hadoop.benchmarks.mapred that implement Reducer | |
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class |
BenchmarkReducer
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Uses of Reducer in org.apache.hadoop.examples |
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Classes in org.apache.hadoop.examples that implement Reducer | |
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static class |
PiEstimator.PiReducer
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class |
RandomWriter
This program uses map/reduce to just run a distributed job where there is no interaction between the tasks and each task write a large unsorted random binary sequence file of BytesWritable. |
static class |
WordCount.Reduce
A reducer class that just emits the sum of the input values. |
Uses of Reducer in org.apache.hadoop.mapred.lib |
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Classes in org.apache.hadoop.mapred.lib that implement Reducer | |
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class |
IdentityReducer
Performs no reduction, writing all input values directly to the output. |
class |
LongSumReducer
A Reducer that sums long values. |
Uses of Reducer in org.apache.hadoop.streaming |
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Classes in org.apache.hadoop.streaming that implement Reducer | |
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class |
PipeCombiner
A generic Combiner bridge. To use a Combiner specify -combiner myprogram in hadoopStreaming. |
class |
PipeReducer
A generic Reducer bridge. |
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