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Explain what is the function of mapreduce partitioner?


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More MapReduce Interview Questions

What is the relationship between Job and Task in Hadoop?

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Where is the output of Mapper written in Hadoop?

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What does conf.setmapper class do?

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

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What is the need of MapReduce in Hadoop?

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what is WebDAV in Hadoop?

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What is a MapReduce Combiner?

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What do sorting and shuffling do?

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List the network requirements for using Hadoop ?

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What is identity mapper and identity reducer?

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What is partitioning in MapReduce?

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If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?

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