Metadata inherited to child spans

[ludwikbukowski]

When adding context to Trace and adding some custom metadata:

Spandex.Plug.AddContext.call(conn, tracer_opts: [tags: [custom_metadata: data]])

Looks that when it's sent to DatadogAgent, its replicating the custom_metadata per each span.
It produce a lot of binary data. What if I'd like to have sent it once, per root span, without replicating it for each child span?

[zachdaniel]

I think this issue ought to be brought up on the parent project spandex at https://github.com/spandex-project/spandex

If my answer doesn't fully address your question, please open the issue there!

This isn't well documented, but you can set the private key instead of tags and that meta will not be inherited by child spans.