wsry opened a new pull request #18474:
URL: https://github.com/apache/flink/pull/18474
## What is the purpose of the change
Currently, for sort-shuffle the generation of subpartition data storage
order is random shuffle. However, if there is no enough resources to run the
downstream consumer tasks in parallel, the performance can be influenced
because of the random disk IO caused by the random subpartition data storage
order. This ticket aims to improve this scenario.
## Brief change log
- Adjust the generation of subpartition data storage order for
sort-shuffle from random shuffle to random shift.
## Verifying this change
This change is already covered by existing tests.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes / **no**
/ don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / **no** / don't
know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / **no**)
- If yes, how is the feature documented? (**not applicable** / docs /
JavaDocs / not documented)
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