this post was submitted on 17 Aug 2024
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You should definitely be! I take backups every 6h for my self hosted vaultwarden (easier to manage and to backup, but not official, YMMV). You can also restore each backup automatically and have a "second service" you can run elsewhere (a standby basically), which will also ensure the backup works fine.
I have been running bit/vaultwarden now for I think 6 years, for my whole family and I have never needed to do anything, despite having had a few hiccups with the server.
Don't take my word for it, but the clients (browser plugin, desktop app, mobile app) are designed to keep data locally I think. So the term cache might be misleading here because it suggests some temporary storage used just to save web requests, with a relatively quick expiration. In this case I think the plugin etc. can work potentially indefinitely without server - something to double-check, but I believe it's the design.
Yes, I figured the word “cache” was used loosely in this case. But you know, the server is down and/or irrecoverable for a while, and then one’s phone gets swiped. Not inconceivable. So I think I’ll follow some of the advice here about a backup service or password stash