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