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Posted to dev@mahout.apache.org by "Dmitriy Lyubimov (JIRA)" <ji...@apache.org> on 2015/06/08 22:36:01 UTC

[jira] [Updated] (MAHOUT-1717) allreduceBlock operator api and Spark implementation

     [ https://issues.apache.org/jira/browse/MAHOUT-1717?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dmitriy Lyubimov updated MAHOUT-1717:
-------------------------------------
    Summary: allreduceBlock operator api and Spark implementation  (was: allReduce operator api and Spark implementation)

> allreduceBlock operator api and Spark implementation
> ----------------------------------------------------
>
>                 Key: MAHOUT-1717
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1717
>             Project: Mahout
>          Issue Type: Improvement
>            Reporter: Dmitriy Lyubimov
>            Assignee: Dmitriy Lyubimov
>             Fix For: 0.10.2
>
>
> need it surprisingly often. 
> allreduceMap ( map: (keys, Matrix) => Matrix, reduce: (Matrix, Matrix) => Matrix) : Matrix
> again since we cannot guarantee we'd ask engines to serialize any type, we operate on types we do know will work (I.e. matrix blocks).



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