What combiners is and when you should use a combiner in a MapReduce Job?


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More MapReduce Interview Questions

What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?

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In MapReduce how to change the name of the output file from part-r-00000?

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what are the three modes in which Hadoop can be run?

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Clarify what is shuffling in map reduce?

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What is a "reducer" in Hadoop?

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How to create a custom key and custom value in MapReduce Job?

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How is reporting controlled in hadoop?

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What is a "map" in Hadoop?

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How does inputsplit in mapreduce determines the record boundaries correctly?

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Explain combiners.

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Why is output file name in Hadoop MapReduce part-r-00000?

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What are the main components of MapReduce Job?

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