When is the reducers are started in a MapReduce job?


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More MapReduce Interview Questions

how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?

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How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?

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what is a Task Tracker in Hadoop?

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Difference between mapreduce and spark

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How data is spilt in Hadoop?

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What are advantages of Spark over MapReduce?

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How to set the number of reducers?

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Explain the differences between a combiner and reducer

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What is an identity mapper and identity reducer?

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Explain the Reducer's reduce phase?

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Explain task granularity

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How does inputsplit in mapreduce determines the record boundaries correctly?

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