How to write a custom partitioner for a Hadoop MapReduce job?

649

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What is the need of MapReduce in Hadoop?

627

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What does a 'MapReduce Partitioner' do?

679

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What is the difference between Reducer and Combiner in Hadoop MapReduce?

674

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What is Data Locality in Hadoop?

663

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What is KeyValueTextInputFormat in Hadoop MapReduce?

802

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What is Mapper in Hadoop MapReduce?

725

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How to set mappers and reducers for MapReduce jobs?

631

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How to sort intermediate output based on values in MapReduce?

653

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Can we set the number of reducers to zero in MapReduce?

700

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Where sorting is done on mapper node or reducer node in MapReduce?

667

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Which Sorting algorithm is used in Hadoop MapReduce?

597

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What is the need of MapReduce?

625

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How to configure the number of the Combiner in MapReduce?

623

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How to change a number of mappers running on a slave in MapReduce?

787

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