wsry opened a new pull request #15300:
URL: https://github.com/apache/flink/pull/15300
## What is the purpose of the change
Currently, different TaskManagers select shuffle data directory in the same
order and if there are multiple disks, some disks may stores more data than
others which is bad for performance. This patch shuffles the data directories
to make it fairer for selection between different TaskManagers, which is good
for load balance especially when there are multiple disks.
## Brief change log
- Shuffle data directories to make directory selection of different
TaskManagers fairer.
## Verifying this change
This change is already covered by existing tests.
## 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/Mesos, 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.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
