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https://issues.apache.org/jira/browse/MAHOUT-904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13172007#comment-13172007
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Grant Ingersoll commented on MAHOUT-904:
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OK. I still just like patches ;-).
Couple of things:
# We have a Pair class already, we should just make PairWritable use that and
put it in the appropriate package.
# I think we should try to hook this into SplitInput such that we can still
have many of it's options available, just done at bigger scale. Either that or
we need a Driver for this. Ultimately, though, we need a way to create
train/test splits where the train split is randomized.
> 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
>
>
> 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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