[jira] [Created] (FLINK-28889) Hybrid shuffle writes multiple copies of broadcast data

["Weijie Guo (Jira)" <ji...@apache.org>]

Weijie Guo created FLINK-28889:
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             Summary: Hybrid shuffle writes multiple copies of broadcast data
                 Key: FLINK-28889
                 URL: https://issues.apache.org/jira/browse/FLINK-28889
             Project: Flink
          Issue Type: Bug
            Reporter: Weijie Guo


Hybrid shuffle writes multiple copies of broadcast data, This will cause a waste of memory and disk space and affect the performance of shuffle write phase. Ideally, for the full spilling strategy, any broadcast data (record or event) should only write one piece of data in the memory, and the same is true for the disk. For selective spilling strategy, if the broadcast edge is encountered, we should consider directly turning it into the edge of HYBRID_FULL, or introducing configuration option to decide whether to do this switch. 



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