Cloud based real-time collaborative filtering for item-item recommendations

We describe a large scale implementation of a video recommendation system in use by the largest media group in Latin America. Taking advantage of existing recommendation system techniques, the proposed architecture goes beyond the state of the art by making use of a commercial cloud computing platform to provide scalability, reduce costs and, more importantly, response times. We discuss the implementation in detail, in particular the design of cloud based features. We also provide a comprehensive generalization of the architecture that allows its application in other settings. (C) 2013 Elsevier B.V. All rights reserved.