hodlbod on Nostr: Backup relays are something I've thought about some. I even had them in some ...

Backup relays are something I've thought about some. I even had them in some revisions of my relay-based groups:

https://github.com/coracle-social/nips/blob/379b69c42b9db641e0c8383d5bfbd891ef4abaf4/29.md#federation
https://github.com/coracle-social/nips/blob/60179dfba2a51479c569c9192290bb4cefc660a8/xx.md#federation

But in most cases, the backups don't even need to be specified, since anyone with access to the main relay can sync events to their backup. Then, when the original relay goes away you just manually move to the new one.