reswqa opened a new pull request, #19960:
URL: https://github.com/apache/flink/pull/19960
## What is the purpose of the change
*Abstract and implement disk read and write logic for hybrid shuffle*
## Brief change log
- *3bc76b66 : Please don't review, introduce HsDataIndex will open a pull
request in another ticket*
- *5c79e352 : Abstract SubpartitionFileReader and
ResultPartitionReadScheduler from sort-merge shuffle.*
- *660ac5c8: Introduce HsSubpartitionFileReader and
HsResultPartitionReadScheduler.*
## Verifying this change
This change added unit tests.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): no
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: no
- The serializers: no
- The runtime per-record code paths (performance sensitive): no
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
- The S3 file system connector: no
## Documentation
- Does this pull request introduce a new feature? no
- If yes, how is the feature documented? not applicable
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