Yes, thats what prediction should be doing, taking dot products or sigmoid function for each user,item pair. For 1 million users and 10 K items data there are 10 billion pairs.
-- View this message in context: http://apache-spark-user-list.1001560.n3.nabble.com/Large-scale-ranked-recommendation-tp10098p10107.html Sent from the Apache Spark User List mailing list archive at Nabble.com.