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https://issues.apache.org/jira/browse/MAHOUT-904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13175408#comment-13175408
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Sean Owen commented on MAHOUT-904:
----------------------------------
(I don't know if this is a relevant comment, but we ought to be using
VarIntWritable and VarLongWritable, not IntWritable and LongWritable, for
better space savings.)
> SplitInput should support randomizing the input
> -----------------------------------------------
>
> Key: MAHOUT-904
> URL: https://issues.apache.org/jira/browse/MAHOUT-904
> Project: Mahout
> Issue Type: Improvement
> Reporter: Grant Ingersoll
> Assignee: Raphael Cendrillon
> Labels: MAHOUT_INTRO_CONTRIBUTE
> Attachments: MAHOUT-904.patch, MAHOUT-904.patch, MAHOUT-904.patch,
> MAHOUT-904.patch, MAHOUT-904.patch, MAHOUT-904.patch
>
>
> For some learning tasks, we need the input to be randomized (SGD) instead of
> blocks of labels all at once. SplitInput is a useful tool for setting up
> train/test files but it currently doesn't support randomizing the input.
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