What combiners are and when you should use a combiner in a mapreduce job?


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More MapReduce Interview Questions

What is shuffling and sorting in mapreduce?

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How to set mappers and reducers for Hadoop jobs?

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Name job control options specified by mapreduce.

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How to overwrite an existing output file during execution of mapreduce jobs?

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When is it not recommended to use MapReduce paradigm for large

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How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

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what daemons run on a master node and slave nodes?

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What is InputFormat in Hadoop MapReduce?

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What are the various configuration parameters required to run a mapreduce job?

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What is the function of mapreduce partitioner?

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Why is Apache Spark faster than Hadoop MapReduce?

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What is SequenceFileInputFormat?

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