joosthooz opened a new pull request, #34168:
URL: https://github.com/apache/arrow/pull/34168
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### Rationale for this change
The structure of the opentelemetry traces have changed significantly
recently, this PR aims to improve some things that were left out of scope at
that time. Specifically this PR aims to improve the tracing of the I/O side of
things. We'll add spans for low-level I/O calls (e.g. `write`) and portions of
the Parquet writer and Datasetwriter. The goal is to be able to distinguish
work performed on the I/O threadpool versus the normal threadpool and see how
much time was actually spent on I/O or on (de/en)coding and (de)compression.
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### What changes are included in this PR?
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### Are these changes tested?
This is a very early WIP
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### Are there any user-facing changes?
Arrow releases do not have telemetry enabled so these changes should not
affect normal users. But users that are interested in the performance of Acero
will likely want to use the telemetry. For these users, the structure and
details of the spans will likely be changed by this PR. The current
documentation of the telemetry does not include any details about this yet.
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