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Posted to issues@flink.apache.org by "Elias Levy (JIRA)" <ji...@apache.org> on 2017/04/01 23:50:41 UTC

[jira] [Commented] (FLINK-6239) Sharing of State Across Operators

    [ https://issues.apache.org/jira/browse/FLINK-6239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15952466#comment-15952466 ] 

Elias Levy commented on FLINK-6239:
-----------------------------------

If sharing state across operators is not feasible, then as a fallback, a join operator that accept a variable number of streams to join may suffice to implement complex joins across multiple streams.

> Sharing of State Across Operators
> ---------------------------------
>
>                 Key: FLINK-6239
>                 URL: https://issues.apache.org/jira/browse/FLINK-6239
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming
>    Affects Versions: 1.1.4
>            Reporter: Elias Levy
>
> Currently state cannot be shared across operators.  On a keyed stream, the state is implicitly keyed by the operator id, in addition to the stream key.  This can make it more difficult and inefficient to implement complex topologies, where multiple operator may need to access the same state.  It would be value to be able to access keyed value and map stated across operators.



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