Explain task granularity


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More MapReduce Interview Questions

What is Hadoop Map Reduce ?

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Clarify what is shuffling in map reduce?

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

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When the reducers are are started in a mapreduce job?

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What is a scarce system resource?

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What is the difference between Job and Task in MapReduce?

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How to optimize MapReduce Job?

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How is reporting controlled in hadoop?

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

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In MapReduce Data Flow, when Combiner is called?

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What is the problem with the small file in Hadoop?

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How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?

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