A ‘Combiner’ is a mini reducer that performs the local reduce task. It receives the input from the mapper on a particular node and sends the output to the reducer.
Combiners help in enhancing the efficiency of MapReduce by reducing the quantum of data that is required to be sent to the reducers.
Combiners help in enhancing the efficiency of MapReduce by reducing the quantum of data that is required to be sent to the reducers.
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