EMERGING TRENDS IN COMPUTING
CLOUD COMPUTING
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Java interface
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Detailed explanation-1: -Although the Hadoop framework is implemented in JavaTM, MapReduce applications need not be written in Java. Hadoop Streaming is a utility which allows users to create and run jobs with any executables (e.g. shell utilities) as the mapper and/or the reducer.
Detailed explanation-2: -MapReduce is a framework that is used for writing applications to process huge volumes of data on large clusters of commodity hardware in a reliable manner. This chapter takes you through the operation of MapReduce in Hadoop framework using Java.
Detailed explanation-3: -It uses Unix streams as the interface between the Hadoop and our MapReduce program so that we can use any language which can read standard input and write to standard output to write for writing our MapReduce program.