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https://issues.apache.org/jira/browse/MAHOUT-414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12913902#action_12913902
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Hudson commented on MAHOUT-414:
-------------------------------
Integrated in Mahout-Quality #314 (See
[https://hudson.apache.org/hudson/job/Mahout-Quality/314/])
MAHOUT-414: Added configuration arguments to clustering drivers and added
getConf() calls to pick up CLI arguments. Removed numReducers arguments and
deprecated DefaultOptionsCreator.numReducersOption. Adjusted main methods to
use ToolRunner. Fixed unit tests. All tests run.
> 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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