Use of Combiner in Mapreduce


Combiner in Mapreduce 4

Combiners In Mapreduce Combiner is a semi-reducer in mapreduce. This is an optional class which can be specified in mapreduce driver class to process the output of map tasks before submitting it to reducer tasks. Purpose In Mapreduce framework, usually the output from the map tasks is large and data transfer between map and reduce tasks will be high. Since the data transfer across the network is expensive and to […]


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