Hi all, I have read on the documentation that "lakeFS requires a PostgreSQL database to synchronise actions on your repositories". What type of actions are we talking about? I thought that actions relating to data (like commit, merge, rollback...) were stored in the form of metadata directly on the s3?

you can read about the KV store here: https://docs.lakefs.io/understand/how/kv.html

Committed metadata information and the data you upload through lakeFS will be kept in the object-store. Uncommitted metadata information and repository information will be kept in the database - any KV as @Robin Moffatt referenced should work.

Thanks for the clarification.