Zakelly opened a new pull request, #23509: URL: https://github.com/apache/flink/pull/23509
## What is the purpose of the change By default, Flink creates subdirectories named by UUID (job id) under checkpoint directory for each job. It's a good means to avoid collision. However, it also bring in some effort to remember/find the right directory when recovering from previous checkpoint, as well as cleaning the old subdirectories. According to previous discussion ([Yun Tang's](https://issues.apache.org/jira/browse/FLINK-11789?focusedCommentId=16782314&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16782314) and [Stephan Ewen's](https://issues.apache.org/jira/browse/FLINK-9043?focusedCommentId=16409254&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16409254) ), I think it would be useful to add an option to disable creating the UUID subdirectories under the checkpoint directory. For compatibility considerations, we create the subdirectories by default. ## Brief change log - Provide a new configuration named 'state.checkpoints.create-subdir' to control the behavior of creating job-id subdirectories under the checkpoint directory or not. This is an advanced option, which is well documented and warned. ## Verifying this change This change is already covered by newly added tests, a parameterized AbstractFileCheckpointStorageAccessTestBase#testCreateCheckpointSubDirs . ## 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) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
