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How to create custom key and custom value in MapReduce Job?
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What is the job of blend () and repartition () in Map Reduce?
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
Explain the differences between a combiner and reducer
What is the difference between Reducer and Combiner in Hadoop MapReduce?
Explain how mapreduce works.
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How to create custom key and custom value in MapReduce Job?
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what is a sequence file in Hadoop?
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