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https://issues.apache.org/jira/browse/MAHOUT-414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12916490#action_12916490
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Sean Owen commented on MAHOUT-414:
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Jeff would you regard this as complete? I'm the only other one that commented
here and am personally pleased to let you finish this out as you like.
> Usability: Mahout applications need a consistent API to allow users to
> specify desired map/reduce concurrency
> -------------------------------------------------------------------------------------------------------------
>
> Key: MAHOUT-414
> URL: https://issues.apache.org/jira/browse/MAHOUT-414
> Project: Mahout
> Issue Type: Bug
> Affects Versions: 0.3
> Reporter: Jeff Eastman
> Fix For: 0.4
>
>
> If specifying the number of mappers and reducers is a common activity which
> users need to perform in running Mahout applications on Hadoop clusters then
> we need to have a standard way of specifying them in our APIs without
> exposing the full set of Hadoop options, especially for our non-power-users.
> This is the case for some applications already but others require the use of
> Hadoop-level -D arguments to achieve reasonable out-of-the-box parallelism
> even when running our examples. The usability defect is that some of our
> algorithms won't scale without it and that we don't have a standard way to
> express this in our APIs.
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