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Posted to dev@mahout.apache.org by "Dmitriy Lyubimov (JIRA)" <ji...@apache.org> on 2015/06/03 01:05:51 UTC

[jira] [Created] (MAHOUT-1717) allReduce operator api and Spark implementation

Dmitriy Lyubimov created MAHOUT-1717:
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             Summary: allReduce 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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