[jira] [Resolved] (FLINK-9809) Support setting CoLocation constraints on the DataStream Transformations

["Stephan Ewen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-9809?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stephan Ewen resolved FLINK-9809.
---------------------------------
    Resolution: Fixed

Implemented in 3f0b9fee5185fcc7200179459bed31fb4bd08bbf

> Support setting CoLocation constraints on the DataStream Transformations
> ------------------------------------------------------------------------
>
>                 Key: FLINK-9809
>                 URL: https://issues.apache.org/jira/browse/FLINK-9809
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming
>            Reporter: Stephan Ewen
>            Assignee: Stephan Ewen
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.6.0
>
>
> Flink supports co location constraints for operator placement during scheduling. This is used internally for iterations, for example, but is not exposed to users.
> I propose to add a way for expert users to set these constraints. As a first step, I would add them to the {{StreamTransformation}}, which is not part of the public user-facing classes, but a more internal class in the DataStream API. That way we make this initially a hidden feature and can gradually expose it more prominently when we agree that this would be a good idea.



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