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How to write a custom partitioner for a Hadoop MapReduce job?
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What is the function of mapreduce partitioner?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
What is reduce side join in mapreduce?
Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?
Can we rename the output file?
When should you use a reducer?
Explain about the partitioning, shuffle and sort phase in MapReduce?
What is partitioner and its usage?
What is Combiner in MapReduce?
Why do we need MapReduce during Pig programming?
How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?
In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?
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