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MapReduce, mail # user - MapReduce Job don't need sort.


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Re: MapReduce Job don't need sort.
Radim Kolar 2012-01-14, 12:29
> Does any queries/jobs do not need sort phase? I can only think of
aggregation.
If you are talking about sorting keys before feeding them to reduce,
then yes. almost none of my jobs needs sorted keys in reducer,
aggregation only should be enough.