I have setup hadoop on top of mongodb using hadoop-mongodb driver. Currently I can successfully output results from a M/R job to a mongo colection. I would like to use mahout to take advantage of some of the provided algorithms. Is it possible to use mahout on top of mongodb and output directly to a mongo collection? Is there a how to or a sample I can read?
Yes, but it is nothing directly to do with Mahout. You specify your input and output URLs in a way that selects your MongoDB locations. The rest is a matter of Hadoop-Mongo integration and setup.