Hadoop is a software platform that lets one easily write and run applications that process vast amounts of data. Here's what makes Hadoop especially useful: * Scalable: Hadoop can reliably store and process petabytes. * Economical: It distributes the data more...
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 more...

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