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MapReduce : Simplified Data Processing on Large Clusters / Jeffrey Dean, Sanjay Ghemawat 200413 tr. ; cm.MapReduce is a programming model and an associated implementation for processing and generating large data sets. Users specify a map function that processes a key/value pair to generate a set of intermediate key/value pairs, and a reduce function that merges all intermediate values associated with the same intermediate key. Many real world tasks are expressible in this model, as shown in the paper.
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