Explain MapReduce processing.

FIGURE 8-22 MapReduce MAP INPUT: DOCUMENT Computer 01: List individual words and count how many times each word appears Document Section 01 REDUCE Computer: Combine lists of individual words and total counts of how many times each word appears Computer 02: List individual words and count how many times each word appears Document Section 02 Computer 03: List individual words and count Document Section 03 how many times each word appears OUTPUT: WORD COoUNT 56 85 15 27 And Boy Dog Document Section N The Shown Sun Way 67 12 12 Computer N: List individual words and count how many times each word appears