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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAHOUT-1429) Parallelize YtransposeY in ImplicitFeedbackAlternatingLeastSquaresSolver
Date Mon, 03 Mar 2014 22:18:33 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-1429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13918647#comment-13918647
] 

Hudson commented on MAHOUT-1429:
--------------------------------

SUCCESS: Integrated in Mahout-Quality #2500 (See [https://builds.apache.org/job/Mahout-Quality/2500/])
MAHOUT-1429 Parallelize YtransposeY in ImplicitFeedbackAlternatingLeastSquaresSolver (ssc:
rev 1573773)
* /mahout/trunk/CHANGELOG
* /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/als/SolveImplicitFeedbackMapper.java
* /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/recommender/svd/ALSWRFactorizer.java
* /mahout/trunk/math/src/main/java/org/apache/mahout/math/als/ImplicitFeedbackAlternatingLeastSquaresSolver.java


> Parallelize YtransposeY in ImplicitFeedbackAlternatingLeastSquaresSolver
> ------------------------------------------------------------------------
>
>                 Key: MAHOUT-1429
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1429
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Collaborative Filtering
>    Affects Versions: 0.9
>            Reporter: Adam Ilardi
>            Assignee: Sebastian Schelter
>            Priority: Minor
>              Labels: newbie, patch, performance
>             Fix For: 1.0
>
>         Attachments: MAHOUT-1429.patch
>
>
> I wrote a simple patch to do the calculation in parallel. It could be better but it gets
the job done. Is there some other (Matrix transpose dot matrix) code in mahout that is already
parallel? I will reuse that if it exists.  



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