francis-a opened a new pull request, #28897:
URL: https://github.com/apache/flink/pull/28897
## What is the purpose of the change
Currently the number of threads used by the `ForStStateDataTransfer` class
is hardcoded to 4. This PR proposes a new
`state.backend.forst.checkpoint.transfer.thread.num` configuration option that
allows for providing a custom thread number value.
## Brief change log
- Added a new `state.backend.forst.checkpoint.transfer.thread.num` config
option
- Updated the `ForStResourceContainer` with a getter to return this option
value
- Updated `ForStStateDataTransfer` to provide the new config option value
instead of the hardcoded default of 4
- Removed the hardcoded default
## Verifying this change
This change is a trivial rework / code cleanup without any test coverage.
## 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: (yes / no / don't know)
## Documentation
- Does this pull request introduce a new feature? yes
- If yes, how is the feature documented? Documentation has been added
using the existing `ConfigOption` class
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