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The Apache Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of computers using simple programming models.

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Can map-reduce say "Hello World"?

If you want to write a simple map reduce program that runs locally look at hadoop streaming. … If you want to toy around and learn how to write map reduce jobs, you should just take a look at this tutorial: http://www.michael-noll.com/tutorials/writing-an-hadoop-mapreduce-program-in-python/ and …
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