Unix- Open Source Softwares MapReduce is a programming model for processing large data sets with a parallel, distributed algorithm on a cluster. A MapReduce program comprises a Map() procedure that performs filtering and sorting (such as sorting students by first name into queues, one queue for each name) and a Reduce() procedure that performs a summary operation (such as counting the number of students in each queue, yielding name frequencies). The "MapReduce System" (also called "infrastructure", "framework") orchestrates by marshalling the distributed servers, running the various tasks in parallel, managing all communications and data transfers between the various parts of the system, providing for redundancy and fault tolerance, and overall management of the whole process. -(Wikipedia )
Posted on: Sat, 10 Aug 2013 15:31:23 +0000
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