open-telemetry
Support stand-alone exponential histogram data structure for use by OpenTelemetry components
Problem Statement
https://github.com/open-telemetry/opentelemetry-go/issues/2501 describes adding stand-alone exponential histogram mapping functions for use by OpenTelemetry components (e.g., the OTel Collector's standard logging exporter). The same request exists for a stand-alone exponential histogram data structure (e.g., the OTel Collector's statsd receiver).
Proposed Solution
Following the decision in https://github.com/open-telemetry/opentelemetry-go/issues/3169, create a structure sub-package, a sibling of mapping that supports use in the Collector as well as by the metrics SDK. The contents of #3022 contain the pending structure package.
Alternatives
Presently, the pending PR https://github.com/open-telemetry/opentelemetry-collector-contrib/pull/12951 refers to Lightstep's copy of the code in #3022, which is acceptable as a temporary measure. Ideally we do not maintain this dependency indefinitely.
Yeah, lets add it now than. We can always bump it later if want to re-scope the milestone, but it is good to track it as work that needs to be done for the metric SDK (at some point).
