This quick start page describes how to run the recommendation examples provided by Mahout. Mahout comes with four recommendation mining examples. They are based on netflixx, jester, grouplens and bookcrossing respectively.
Testing it on one single machine
In the examples directory type:
Here, the command line options need only be:
Note that the GroupLens example is designed for the "1 million" data set, available at http://www.grouplens.org/node/73 . And the "input file" above is the ratings.dat contained in the zipfile from the data set . This file has an unusual format and so has a special parser. The example code here can be easily modified to use a regular FileDataModel and thus work on more standard input, including the other data sets available at this site.