MapReduce
MapReduce is a programming model used to process and generate large data sets in parallel across multiple computers in a cluster using a distributed algorithm. In the case of Hadoop, the MapReduce programs are executed on a cluster of commodity servers, which offers a high degree of fault tolerance and linear scalability.
MapReduce libraries are available in several programming languages for various database systems. The open source implementation of MapReduce in Hadoop delivers fast performance, not just because of the MapReduce, but also because Hadoop minimizes the expensive movement of data on a network by performing data processing close to where the data is stored.
Until the launch of Apache YARN, MapReduce was the dominant programming ...
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