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Posted to dev@mahout.apache.org by "Sebastian Schelter (Commented) (JIRA)" <ji...@apache.org> on 2011/12/08 10:01:41 UTC

[jira] [Commented] (MAHOUT-827) Another version of RecommenderJob that broadcasts the similarity matrix

    [ https://issues.apache.org/jira/browse/MAHOUT-827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13165103#comment-13165103 ] 

Sebastian Schelter commented on MAHOUT-827:
-------------------------------------------

Has anybody time to review this? Or should I just commit it?
                
> Another version of RecommenderJob that broadcasts the similarity matrix
> -----------------------------------------------------------------------
>
>                 Key: MAHOUT-827
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-827
>             Project: Mahout
>          Issue Type: New Feature
>          Components: Collaborative Filtering
>    Affects Versions: 0.6
>            Reporter: Sebastian Schelter
>            Assignee: Sebastian Schelter
>         Attachments: MAHOUT-827-2.patch, MAHOUT-827-3.patch, MAHOUT-827.patch
>
>
> Add another version of RecommenderJob that computes the item similarities via RowSimilarityJob but assumes that the resulting similarity matrix fits into the memory of the mappers in the cluster. After the item similarity computation is done, the similarities are broadcasted via Hadoop's distributed cache and the recommendations are computed in a map-only pass over the data afterwards.

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