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Added Classes and Interfaces | |
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The ChainMapper class allows to use multiple Mapper classes within a single Map task. |
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The ChainReducer class allows to chain multiple Mapper classes after a Reducer within the Reducer task. |
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An InputFormat that delegates behaviour of paths to multiple other InputFormats. |
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An Mapper that delegates behaviour of paths to multiple other mappers. |
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Utility for collecting samples and writing a partition file for org.apache.hadoop.mapred.lib.TotalOrderPartitioner. |
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Sample from s splits at regular intervals. |
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Sample from random points in the input. |
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Interface to sample using an org.apache.hadoop.mapred.InputFormat. |
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Samples the first n records from s splits. |
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This comparator implementation provides a subset of the features provided by the Unix/GNU Sort. |
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This class supports MapReduce jobs that have multiple input paths with a different InputFormat and Mapper for each path |
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The MultipleOutputs class simplifies writting to additional outputs other
than the job default output via the OutputCollector passed to
the map() and reduce() methods of the
Mapper and Reducer implementations. |
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Partitioner effecting a total order by reading split points from an externally generated source. |
Changed Classes | |
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Defines a way to partition keys based on certain key fields (also see KeyFieldBasedComparator. |
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