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Posted to dev@flink.apache.org by "Yingjie Cao (Jira)" <ji...@apache.org> on 2021/03/14 01:42:00 UTC
[jira] [Created] (FLINK-21777) Replace the 4M data writing cache of
sort-merge shuffle with writev system call
Yingjie Cao created FLINK-21777:
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Summary: Replace the 4M data writing cache of sort-merge shuffle with writev system call
Key: FLINK-21777
URL: https://issues.apache.org/jira/browse/FLINK-21777
Project: Flink
Issue Type: Sub-task
Components: Runtime / Network
Affects Versions: 1.12.0
Reporter: Yingjie Cao
Fix For: 1.13.0
Currently, the sort-merge shuffle implementation uses 4M unmanned direct memory as cache for data written. It can be replaced by the writev system call which can reduce the unmanned direct memory usage without any performance loss.
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