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What Is Partition? |
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Answer» After COMBINER and intermediate mapoutput the Partitioner controls the keys after sort and shuffle. Partitioner divides the intermediate data ACCORDING to the NUMBER of reducers so that all the data in a SINGLE partition gets executed by a single reducer. It means each partition can executed by only a single reducer. If you call reducer, automatically partition called in reducer by automatically. After combiner and intermediate mapoutput the Partitioner controls the keys after sort and shuffle. Partitioner divides the intermediate data according to the number of reducers so that all the data in a single partition gets executed by a single reducer. It means each partition can executed by only a single reducer. If you call reducer, automatically partition called in reducer by automatically. |
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