摘要: it's abt the explaination of mapreduce in hugely concise way.
MapReduce explained in 41 words
author: Chris Stucchio
Goal: count the number of books in the library.
Map: You count up shelf #1, I count up shelf #2.
(The more people we get, the faster this part goes. )
Reduce: We all get together and add up our individual counts.