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Posted to issues@flink.apache.org by "Robert Metzger (JIRA)" <ji...@apache.org> on 2019/02/28 13:12:00 UTC

[jira] [Updated] (FLINK-3783) Support weighted random sampling with reservoir

     [ https://issues.apache.org/jira/browse/FLINK-3783?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Metzger updated FLINK-3783:
----------------------------------
    Component/s:     (was: Core)
                 API / DataSet

> Support weighted random sampling with reservoir
> -----------------------------------------------
>
>                 Key: FLINK-3783
>                 URL: https://issues.apache.org/jira/browse/FLINK-3783
>             Project: Flink
>          Issue Type: Improvement
>          Components: API / DataSet
>            Reporter: GaoLun
>            Assignee: GaoLun
>            Priority: Minor
>
> In default random sampling, all items have the same probability to be selected. But in weighted random sampling, the probability of each item to be selected is determined by its weight with respect to the weights of the other items.



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