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Posted to issues@beam.apache.org by "Robert Bradshaw (Jira)" <ji...@apache.org> on 2021/12/24 02:45:00 UTC

[jira] [Assigned] (BEAM-13541) Use runtime information to improve CoGroupByKey caching

     [ https://issues.apache.org/jira/browse/BEAM-13541?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Bradshaw reassigned BEAM-13541:
--------------------------------------

    Assignee: Robert Bradshaw

> Use runtime information to improve CoGroupByKey caching
> -------------------------------------------------------
>
>                 Key: BEAM-13541
>                 URL: https://issues.apache.org/jira/browse/BEAM-13541
>             Project: Beam
>          Issue Type: Improvement
>          Components: sdk-ideas
>            Reporter: Sunil Pedapudi
>            Assignee: Robert Bradshaw
>            Priority: P2
>
> Currently, CoGroupByKey creates UnionTables that are Flattened. The Flattened output is processed by a GroupByKey to produce a CoGbkResult (via ConstructCoGbkResultFn). 
>  
> Given the performance of CoGBK is greatly impacted based on the which elements are cached in the (finitely sized) in-memory results, it would be useful if CoGbkResult can use runtime information to prioritize which elements are stored in-memory.



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