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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2022/06/04 22:43:51 UTC

[GitHub] [beam] damccorm opened a new issue, #21345: Use runtime information to improve CoGroupByKey caching

damccorm opened a new issue, #21345:
URL: https://github.com/apache/beam/issues/21345

   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.
   
   Imported from Jira [BEAM-13541](https://issues.apache.org/jira/browse/BEAM-13541). Original Jira may contain additional context.
   Reported by: pedapudi.


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