[jira] Commented: (MAHOUT-212) Need random sampler for use in reducers

["Sean Owen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAHOUT-212?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12786806#action_12786806 ] 

Sean Owen commented on MAHOUT-212:
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This kinda already existed as SamplingIterator -- does that do the same thing? could these be merged then, pulling the class into a common location and combining aspects of both?

> Need random sampler for use in reducers
> ---------------------------------------
>
>                 Key: MAHOUT-212
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-212
>             Project: Mahout
>          Issue Type: Bug
>          Components: Utils
>    Affects Versions: 0.2
>            Reporter: Ted Dunning
>            Assignee: Sean Owen
>             Fix For: 0.3
>
>         Attachments: MAHOUT-212.patch
>
>
> For a variety of mining algorithms, it helps to have a uniform way to only process a sub-set of the records in a reducer.
> As such, I have written a simple generic sampler that filters an Iterator returning a fair sample of at most a specified size.

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