what another open source you can recommend ?

I'm not the person you asked -- and I also want to be transparent that I only PoC-ed it and due to external circumstances didn't get it all the way out to production -- but I really like how https://github.com/metrico/qryn (AGPLv3) thinks about the world. It is, like SigNoz, unified (logs, metrics, traces) but it actually implements several of the common endpoint schemes allowing it to pretend to be "your favorite tool" which plausibly helps any integration story <https://github.com/metrico/qryn#%EF%B8%8F-query> and <https://github.com/metrico/qryn#-vendors-compatibility>. Had I gotten it up and running, I was going to contribute a Splunk ingest adapter since that was what we were trying to replace

I was going to take advantage of Clickhouse using S3 as warm-to-cold storage since my mental model is that most logs, metrics, and traces are written and not read https://clickhouse.com/docs/en/integrations/s3#configuring-s...

I believe one could do that with SigNoz, too, so I don't mean to imply that trickery was qryn specific, just that I didn't want to get into the "constantly resizing io3 PVC" game

qryn developer here, thanks for the mention and for the kind words! hope we'll get another shot in the future!

Maybe Loki, but it has some limitations related to high cardinality data and indices (https://signoz.io/blog/logs-performance-benchmark/?utm_sourc...)