Finally! A Hadoop Hello World That Isn’t A Lame Word Count! by John Berryman.
From the post:
So I got bored of the old WordCount Hello World, and being a fairly mathy person, I decided to make my own Hello World in which I coaxed Hadoop into transposing a matrix!
…
What? What’s that you say? You think that a matrix transpose MapReduce is way more lame than a word count? Well I didn’t say that we were going to be saving the world with this MapReduce job, just flexing our mental muscles a little more. Typically, when you run the WordCount example, you don’t even look at the java code. You just pat yourself on the back when the word “the” invariably revealed to be the most popular word in the English language.
The goal of this exercise is to present a new challenge and a simple challenge so that we can practice thinking about solving BIG problems under the sometimes unintuitive constraints of MapReduce. Ultimately I intend to follow this post up with exceedingly more difficult MapReduce problems to challenge you and encourage you to tackle your own problems.
So, without further adieu:
As John says, not much beyond the Word Count examples but it is a different problem.
The promise of more difficult MapReduce problems sounds intriguing.
Need to watch for following posts.