Ingest storage kafka topic compression

[z0rc]

Documentation mentions that ingest storage uses compression https://github.com/grafana/mimir/blob/mimir-3.0.0/docs/sources/mimir/configure/configure-zone-aware-replication.md?plain=1#L122. But it doesn't specify what compression algorightm it uses.

I'm interested in this, because when inspecting individual messages in kafka topic, they look uncompressed.

Also I wasn't able to find place in code that supposedly configures compression for ingest storage.

Does it make sense to enable compression on kafka topic in this case? To reduce storage allocated for topics.

[deniszh]

According to the code github.com/twmb/franz-go/ used as Kafka client, and looks like it picks ingest_storage.kafka section from config and construct client options from it. But I doi not see any compression options in KafkaConfig.
Probably it's not implemented.