PSA for Misskey/fork admins: Misskey relies on Redis for long-term data storage. It is *not* just a caching solution, and wiping redis will result in permanent data loss.
This is contrary to most guides and documentation regarding redis, because *Misskey is actually using it wrong.* But unfortunately, lots of data is only stored in Redis with no way to re-create it from Postgres:
- All notifications
- Most timelines, if Fanout Timelines is enabled
- Charts and graphs
- Federation jobs, including delayed / scheduled jobs
- Antennas (they "reset" and lose all posts)
- User lists (they "reset" and lose all posts)
- Trending hashtags / notes
- Reversi games
- WebAuthn
- User profiles (specifically the list of posts)
If you ever lose or rollback your Redis cluster, then all of the above will be impacted. So please take regular backups!
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