How to perform collector re-aggregation

[ikstewa]

The "Example Use-cases" in the OpenTelemetry metrics spec lists the example of re-aggregating multiple OTel SDKs in a single Collector to "eliminate the identity of individual SDKs":

https://opentelemetry.io/docs/specs/otel/metrics/data-model/#example-use-cases

4. A number of OTel SDKs running locally each exports 10 second resolution, each reports to a single (local) OTel collector.
   • Collector re-aggregates into 60 second resolution
   • Collector re-aggregates to eliminate the identity of individual SDKs (e.g., distinct service.instance.id values)
   • Collector outputs to an OTLP destination

I'm having a hard time determining how to achieve this.

I thought the metricstransformprocessor might be what I was looking for but the comment specifically says:

It does not do any aggregation across batches, so it is not suitable for aggregating metrics from multiple sources (e.g. multiple nodes or clients)

What is the recommended approach for achieving this?

[ikstewa]

I found this proposed processor which seems to facilitate this use case: #4968

Until that work is completed is there another approach to achieve this use case?