When is the earliest point at which the reduce method of a given Reducer can be called?
A. As soon as at least one mapper has finished processing its input split.
B. As soon as a mapper has emitted at least one record.
C. Not until all mappers have finished processing all records.
D. It depends on the InputFormat used for the job.
When is the earliest point at which the reduce method of a given Reducer can be called?
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When is the earliest point at which the reduce method of a given Reducer can be called?
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