The Go SDK uses the old API [1], but it shouldn't be too hard to migrate it.
The main thing I'd want to do at the same time is move the dependencies on the protos out of that package and have those live only in the harness package [2]. I wasn't aware of that particular separation of concerns until much later, but allows for alternative harness implementations. I have some other work to get the Per-DoFn profiling metrics (eleemnt count, size, time) into the Go SDK this quarter, so I can handle this then. [1] https://github.com/apache/beam/blob/master/sdks/go/pkg/beam/core/metrics/metrics.go#L474 [2] https://github.com/apache/beam/tree/master/sdks/go/pkg/beam/core/runtime/harness On Fri, Oct 4, 2019 at 6:14 PM Pablo Estrada <pabl...@google.com> wrote: > Hello devs, > I recently took a look at how Dataflow is retrieving metrics from the Beam > SDK harnesses, and noticed something. As you may (or may not) remember, the > portability API currently has two ways of reporting metrics. Namely, the > newer MonitoringInfo API[1], and the older Metrics one[2]. > > This is somewhat troublesome because now we have two things that do the > same thing. The SDKs report double the amount of metrics[3][4], and I bet > it's confusing for runner implementers. > > Luckily, it seems like the Flink and Spark runners do use the new API > [5][6] - yay! : ) - so I guess then the only runner that uses the old API > is Dataflow? (internally) > > Which way does the Samza runner use? +Hai Lu? > How about the Go SDK +Robert Burke <r...@google.com> ? - Ah I bet this > uses the old API? > > If they all use the MonitoringInfos, we may be able to clean up the old > api, and move to the new one (somewhat)soon : ) > > [1] > https://github.com/apache/beam/blob/v2.15.0/model/fn-execution/src/main/proto/beam_fn_api.proto#L395 > [2] > https://github.com/apache/beam/blob/v2.15.0/model/fn-execution/src/main/proto/beam_fn_api.proto#L391 > [3] > https://github.com/apache/beam/blob/c1007b678a00ea85671872236edef940a8e56adc/sdks/python/apache_beam/runners/worker/sdk_worker.py#L406-L414 > [4] > https://github.com/apache/beam/blob/c1007b678a00ea85671872236edef940a8e56adc/sdks/python/apache_beam/runners/worker/sdk_worker.py#L378-L384 > > [5] > https://github.com/apache/beam/blob/44fa33e6518574cb9561f47774e218e0910093fe/runners/flink/src/main/java/org/apache/beam/runners/flink/metrics/FlinkMetricContainer.java#L94-L97 > [6] > https://github.com/apache/beam/blob/932bd80a17171bd2d8157820ffe09e8389a52b9b/runners/spark/src/main/java/org/apache/beam/runners/spark/translation/SparkExecutableStageFunction.java#L219-L226 >
