MapReduce
Map emits intermediate key-value pairs from independent input pieces; Reduce combines all values for each key.
For example, map can emit (word, 1) for every word in many files, and reduce can add the counts for each word.
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Map emits intermediate key-value pairs from independent input pieces; Reduce combines all values for each key.
For example, map can emit (word, 1) for every word in many files, and reduce can add the counts for each word.