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