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https://issues.apache.org/jira/browse/MAHOUT-350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12851931#action_12851931
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Sean Owen commented on MAHOUT-350:
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Hmm, I don't understand that. AbstractJob.class and ItemIDIndexMapper.class are
in the same .jar file. There is only one .jar, with both, so both ought to end
up selecting the same .jar file. I'd rather specify the Mapper class instead
just because maybe someday someone subclasses AbstractJob, puts the
implementation in a different jar, and then this line won't work.
I can set it to AbstractJob.class for now... but still think there's something
wrong here.
About the other arguemnts, yes, I agree there should be an option.
I was looking to see how Hadoop accepts arguments like "-Dmapred...." on the
command line. I can't find it parsing these anywhere. So I don't know this
exists.
So I can now start adding custom parameters for things like this.
> add one "JobName" and reduceNumber parameter to
> org.apache.mahout.cf.taste.hadoop.item.RecommenderJob
> ------------------------------------------------------------------------------------------------------
>
> Key: MAHOUT-350
> URL: https://issues.apache.org/jira/browse/MAHOUT-350
> Project: Mahout
> Issue Type: Improvement
> Components: Collaborative Filtering
> Affects Versions: 0.4
> Reporter: Hui Wen Han
> Priority: Minor
> Attachments: screenshot-1.jpg
>
>
> Can add one "JobName" parameter to
> org.apache.mahout.cf.taste.hadoop.item.RecommenderJob?
> if there's a lot of RecommenderJob,it's hard to distinguish those jobs.
> also RecommenderJob has four sub jobs (or phase ) ,can add sub-job name to
> those phase ?
> Because RecommenderJob has not setNumReduceTasks ,it seems that the
> performance is not good in reduce phase.
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