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Combiner method usage

Question asked by harish_cn on Nov 2, 2016
Latest reply on Nov 2, 2016 by anilmapr

We heard combiner can be used if we have more key-value pairs means if same key is repeated for many times , Combiner can be used to make it reduce the work of reducer but In Map-R library its mentioned opposite to in QUIZ Session, can anyone clears ma doubt!!

Thanks in ADVANCE!!