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Is Hadoop hard?

The problem with Hadoop, it is said, is that tangible deployment of this open source framework for big data is tough, complex and not exactly out-of-the-box simple.

Apache Hadoop describes itself as:

“A software library is a framework that allows for the distributed processing of large data sets across clusters of computers using simple programming models.”

That was “simple” programming models OK?

But – and it is one of those really big buts…