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Hui Wen Han commented on MAHOUT-340: ------------------------------------ I just replaced all related int type with long type, it works fine and the performance is very good. I has another question : the original data has 21,545 users totally and has about 640,000 items, it can only generate 153,942 recommendations for 2,694 users, many users has no recommendations generated > org.apache.mahout.cf.taste.hadoop.cooccurence can not support long as user_id > and item_id > ----------------------------------------------------------------------------------------- > > Key: MAHOUT-340 > URL: https://issues.apache.org/jira/browse/MAHOUT-340 > Project: Mahout > Issue Type: Improvement > Components: Collaborative Filtering > Affects Versions: 0.3 > Reporter: Hui Wen Han > Fix For: 0.4 > > > I have preferences data using long as user_id and item_id, > hadoop cooccurence arithmetic can not support it -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.