[homebrewer]

There's not much sense in using these advanced backup tools if you're already on ZFS, even if it's just on the backup server, I would stick with something simpler. Their whole point is in reliable checksums, incremental backups, deduplication, snapshotting on top of a 'simple' classical filesystem. Sounds familiar to any ZFS user?

[nijave]

Dedupe is efficient in Borg. The target needs almost no RAM

[globular-toast]

Are there any good options for an off-site zfs backup server besides a colo?

Would be interested to know what others have set up as I'm not really happy with how I do it. I have zfs on my NAS running locally. I backup to that from my PC via rsync triggered by anacron daily. From my NAS I use rclone to send encrypted backups to Backblaze.

I'd be happier with something more frequent from PC to NAS. Syncthing maybe? Then just do zfs sync to some off site zfs server.

[aeadio]

Aside from rsync.net which was mentioned in a sibling comment, there’s also https://zfs.rent, or any VPS with Linux or FreeBSD installed.

[globular-toast]

zfs.rent is in the wrong location and I can't see anything about zfs send/receive support on rsync.net. What kind of VPS product has multiple redundant disks attached? Aren't they usually provided with virtual storage?

[Tharre]

It's documented here: https://www.rsync.net/products/zfsintro.html

Do note the 5 TiB minimum order for it though, it's not something that's enabled on other accounts.

[gaadd33]

I think Rsync.net supports zfs send/receive

[PunchyHamster]

well, till lightning fries your server. Or you fat finger command and fuck something up.