title: What are SUCCESS and part-r-00000 files in hadoop
body: <p>Although I use Hadoop frequently on my Ubuntu machine I have never thought about <code>SUCCESS</code> and <code>part-r-00000</code> files. The output always resides in <code>part-r-00000</code> file, but what is the use of <code>SUCCESS</code> file? Why does the output file have the name <code>part-r-0000</code>? Is there any significance/any nomenclature or is this just a randomly defined?</p>