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https://issues.apache.org/jira/browse/DATAFU-16?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15587387#comment-15587387
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Matthew Hayes commented on DATAFU-16:
-------------------------------------

I don't think the exponential jump version got added.

> weighted reservoir sampling with exponential jumps UDF
> ------------------------------------------------------
>
>                 Key: DATAFU-16
>                 URL: https://issues.apache.org/jira/browse/DATAFU-16
>             Project: DataFu
>          Issue Type: New Feature
>         Environment: Mac, Linux
> pig-0.11
>            Reporter: jian wang
>            Assignee: jian wang
>            Priority: Minor
>         Attachments: ScoredExpJmpReservoir.java, ScoredReservoir.java, 
> WeightedSamplingCorrectnessTests.java
>
>
> Create a weightedReservoirSampleWithExpJump UDF to implement the weighted 
> reservoir sampling algorithm with exponential jumps. Investigation is tracked 
> in  https://github.com/linkedin/datafu/issues/80. This task is part of 
> experiment of different weighted sampling algorithms.



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