[GitHub] [flink] Myasuka opened a new pull request #8686: [FLINK-11869] Make buffer size in checkpoint stream factory configurable

[GitBox <gi...@apache.org>]

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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