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Posted to dev@mahout.apache.org by "Sean Owen (JIRA)" <ji...@apache.org> on 2011/02/04 18:34:30 UTC

[jira] Commented: (MAHOUT-607) Count used and neglected elements in MaybePruneRowsMapper

    [ https://issues.apache.org/jira/browse/MAHOUT-607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12990640#comment-12990640 ] 

Sean Owen commented on MAHOUT-607:
----------------------------------

Yes I like the idea of counting more things as it aids visibility into the pipeline at run-time. The patch is fine by me, FWIW. I also use an inner enum, though I had usually called it "Counters".

> Count used and neglected elements in MaybePruneRowsMapper
> ---------------------------------------------------------
>
>                 Key: MAHOUT-607
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-607
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Collaborative Filtering
>    Affects Versions: 0.4
>            Reporter: Sebastian Schelter
>            Assignee: Sean Owen
>            Priority: Minor
>             Fix For: 0.5
>
>         Attachments: MAHOUT-607.patch
>
>
> MaybePruneRowsMapper is used to prune the overall number of preferences/ratings our distributed recommender looks at. The patch adds counters to the code so we can see the number of used and neglected preferences in the jobtracker.

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