zhijiangW opened a new pull request #8181: [FLINK-12199][network] Refactor IOMetrics to not distinguish between local/remote in/out bytes URL: https://github.com/apache/flink/pull/8181 ## What is the purpose of the change *At the moment we have `numBytesInLocal/numBytesInRemote` in `IOMetrics` but in the actual usage we just always sum them up. As local/remote is the detail of shuffle service implementation, we can merge the local/remote metrics into one and increment it later in `Task` instead of remote/local channels in network internals.* ## Brief change log - *Remove legacy metric related codes* - *Merge local/remote related metrics into one* - *Modify `LocalInputChannel` and `RemoteInputChannel` to reference with the same metric* ## 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): (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, 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)
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