What Is The Reducer Used For?

1.	What Is The Reducer Used For?
Answer» REDUCER REDUCES a set of intermediate VALUES which share a key to a (usually smaller) set of values. The NUMBER of reduces for the job is set by the USER via Job.setNumReduceTasks(int). Reducer reduces a set of intermediate values which share a key to a (usually smaller) set of values. The number of reduces for the job is set by the user via Job.setNumReduceTasks(int).

Answer»

REDUCER REDUCES a set of intermediate VALUES which share a key to a (usually smaller) set of values.

The NUMBER of reduces for the job is set by the USER via Job.setNumReduceTasks(int).

Reducer reduces a set of intermediate values which share a key to a (usually smaller) set of values.

The number of reduces for the job is set by the user via Job.setNumReduceTasks(int).

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