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Posted to dev@flink.apache.org by "Biao Liu (JIRA)" <ji...@apache.org> on 2017/03/07 11:12:38 UTC

[jira] [Created] (FLINK-5980) Expose max-parallelism value in RuntimeContext

Biao Liu created FLINK-5980:
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             Summary: Expose max-parallelism value in RuntimeContext
                 Key: FLINK-5980
                 URL: https://issues.apache.org/jira/browse/FLINK-5980
             Project: Flink
          Issue Type: Improvement
          Components: DataStream API
            Reporter: Biao Liu
            Assignee: Biao Liu
            Priority: Minor


I am implementing a custom source function. I want to keep all progresses in a ListState to support dynamically scaling just like what FlinkKafkaConsumer did. And I think the max-parallelism value is ideal length for the ListState in my scenario. But I realize that currently the max-parallelism value is not visible to UDF. 
I propose exposing the max-parallelism value in RuntimeContext. It will be useful in dynamically scaling scenario.



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