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HADOOP - What happens if number of reducers are 0?




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asked SRVMTrainings November 11, 2012 02:12 AM  

What happens if number of reducers are 0?


           

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It is legal to set the number of reduce-tasks to zero if no reduction is desired.

In this case the outputs of the map-tasks go directly to the FileSystem, into the output path set by setOutputPath(Path). The framework does not sort the map-outputs before writing them out to the FileSystem.

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