Explain how mapreduce works.


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More MapReduce Interview Questions

When is it not recommended to use MapReduce paradigm for large

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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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How does Mappers run method works?

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Define the purpose of the partition function in mapreduce framework

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Define Writable data types in Hadoop MapReduce?

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What is a "reducer" in Hadoop?

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What is Hadoop Map Reduce ?

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Is it possible to split 100 lines of input as a single split in MapReduce?

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what is JobTracker in Hadoop? What are the actions followed by Hadoop?

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What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?

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Can we submit the mapreduce job from slave node?

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What is a "map" in Hadoop?

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