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https://issues.apache.org/jira/browse/MAHOUT-1464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13939451#comment-13939451
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Dmitriy Lyubimov commented on MAHOUT-1464:
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That's what i normally do, yes. The scalabindings issue points to a branch in 
github. Then there's commit-squash method (described in my blog) i do when 
pushing to svn. Hopefully we'd see direct git pushes for mahout sooner rather 
than later.
However, seeing a combined ("squashed") patch is pretty useful too as apposed 
to tons of indivdiual commits.

> RowSimilarityJob on Spark
> -------------------------
>
>                 Key: MAHOUT-1464
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1464
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Collaborative Filtering
>    Affects Versions: 0.9
>         Environment: hadoop, spark
>            Reporter: Pat Ferrel
>              Labels: performance
>             Fix For: 0.9
>
>         Attachments: MAHOUT-1464.patch, MAHOUT-1464.patch
>
>
> Create a version of RowSimilarityJob that runs on Spark. Ssc has a prototype 
> here: https://gist.github.com/sscdotopen/8314254. This should be compatible 
> with Mahout Spark DRM DSL so a DRM can be used as input. 
> Ideally this would extend to cover MAHOUT-1422 which is a feature request for 
> RSJ on two inputs to calculate the similarity of rows of one DRM with those 
> of another. This cross-similarity has several applications including 
> cross-action recommendations. 



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