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How many times combiner is called on a mapper node in Hadoop?


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More MapReduce Interview Questions

what are the basic parameters of a Mapper?

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What is LazyOutputFormat in MapReduce?

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What are the the issues associated with the map and reduce slots based mechanism in mapReduce?

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What is Mapper in Hadoop MapReduce?

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

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what happens in textinformat ?

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What is shuffling and sorting in mapreduce?

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what is Speculative Execution?

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mapper or reducer?

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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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When is it not recommended to use MapReduce paradigm for large scale data processing?

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What are the disservices of utilizing Apache Spark over Hadoop MapReduce?

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