Myasuka opened a new pull request #8686: [FLINK-11869] Make buffer size in checkpoint stream factory configurable URL: https://github.com/apache/flink/pull/8686 ## What is the purpose of the change Currently, the default buffer size for `FsCheckpointStreamFactory` is only 4KB. This would case a lot of IOPS if stream is large. This PR would make that configurable. ## Brief change log - Add new option `state.backend.fs.buffer-size` in `CheckpointingOptions`. - Introduce `writeBufferSize` in the constructor of `FsCheckpointStreamFactory` and related classes. ## Verifying this change This change added tests and can be verified as follows: - Verify the `writeBufferSize` is configurable in `StateBackendLoadingTest` ## 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, Yarn/Mesos, ZooKeeper: **no** - The S3 file system connector: **no** ## Documentation - Does this pull request introduce a new feature? **yes** - If yes, how is the feature documented? **docs/ JavaDocs**
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