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MapReduce, mail # user - Re: Why/When partitioner is used.


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Re: Why/When partitioner is used.
Sai Sai 2013-06-07, 11:17
I always get confused why we should partition and what is the use of it.
Why would one want to send all the keys starting with A to Reducer1 and B to R2 and so on...
Is it just to parallelize the reduce process.
Please help.
Thanks
Sai