azagrebin commented on issue #8181: [FLINK-12199][network] Refactor IOMetrics to not distinguish between local/remote in/out bytes URL: https://github.com/apache/flink/pull/8181#issuecomment-483988809 @zhijiangW The idea looks good to me. Only one thing to clarify: `during creating SingleInputGate we could pass ProxyMetricGroup for the input channel to create numBytesInLocal and numBytesInRemote`. At the moment, we have only one `numBytesInLocal/Remote` per task, so they have to be created only once per task. But I think we could already introduce the totals here for `IOMetrics` (also one per task) as you wrote and increment them in `SingleInputGate` before we introduce `InputGateWithMetrics` and think about `NetworkEnvironment#registerMetrics`.
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