Sure this post is late to the game - but c’est la vie. Really, this isn’t a post anyway - it’s just a link to someone else’s post - a post that clearly and simply explains what MapReduce is and why it is useful. If you are already familiar with map reduce - move along there is nothing to see here. However, if you only have a vague notion about it - or don’t understand it at all - then please proceed to “MapReduce for Mere Mortals