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How to set the number of reducers?


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More MapReduce Interview Questions

Developing a MapReduce Application?

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How to set the number of reducers?

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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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Map reduce jobs are failing on a cluster that was just restarted. They worked before restart. What could be wrong?

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Describe what happens to a mapreduce job from submission to output?

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What are mapreduce new and old apis while writing map reduce program?. Explain how it works

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What comes in Hadoop 2.0 and MapReduce V2 YARN

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Is it possible to rename the output file?

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Explain what you understand by speculative execution

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What is the key- value pair in Hadoop MapReduce?

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what is a Task Tracker in Hadoop?

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What is sqoop in Hadoop ?

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