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Map reduce jobs take too long. What can be done to improve the performance of the cluster?


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More MapReduce Interview Questions

With the help of two examples name the map and reduce function purpose

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Explain what is shuffling in mapreduce?

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how can you check whether Namenode is working beside using the jps command?

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What are ‘maps’ and ‘reduces’?

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How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?

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What is the use of InputFormat in MapReduce process?

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What is difference between an input split and hdfs block?

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

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How to optimize MapReduce Job?

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What is the sequence of execution of Mapper, Combiner, and Partitioner in MapReduce?

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how indexing in HDFS is done?

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Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?

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