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https://issues.apache.org/jira/browse/MAHOUT-777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13087182#comment-13087182
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Dmitriy Lyubimov commented on MAHOUT-777:
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looks reasonable.
> Improve TransposeJob to use a Combiner
> --------------------------------------
>
> Key: MAHOUT-777
> URL: https://issues.apache.org/jira/browse/MAHOUT-777
> Project: Mahout
> Issue Type: Improvement
> Components: Math
> Affects Versions: 0.6
> Reporter: Sebastian Schelter
> Assignee: Sebastian Schelter
> Fix For: 0.6
>
> Attachments: MAHOUT-777.patch
>
>
> I saw that TransposeJob has a comment that it needs a rewrite to use a
> combiner. If we emit vectors instead of MatrixEntryWritables we should be
> able to "merge" them in a combiner.
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