Been experimenting with OpenTelemetry->Parquet conversion lately for logs, metrics, and traces. Lots of related projects popping up in this area. It's powerful and cheap.

- https://github.com/smithclay/otlp2parquet (shameless plug, based on Clickhouse's Otel schema) - https://github.com/Mooncake-Labs/moonlink (also has OTLP support) - https://github.com/open-telemetry/otel-arrow (official community project under early dev)