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Sanity check - is rsyncing to a remote computer that has zfs snapshotting an okay way to back things up? (lemm.ee)

submitted 5 months ago by [email protected] to c/selfhosted

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I currently have two computers, one that has a big zfs raidz pool that I currently back everything up to. Right now, on my local computer I use rsnapshot to do snapshot backups via rsync to the remote zfs pool. I know I'm wasting a ton of space because I have snapshotting in the rsync backup, and then the zfs pool is snapshotted every day.

Does it make sense to just do a regular rsync into a backup directory on the zfs pool and then just rely on the zfs pool snapshotting for snapshotting?

Maybe eventually I will put the local machine on zfs and then just send the local zfs snapshots over, but that will take some time. Thanks!

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[–] [email protected] 2 points 5 months ago (1 children)

Wouldn't send/receive also sync snapshots across ZFS instances?

[–] [email protected] 1 points 5 months ago (1 children)

Docs say this , so yeah. "send streams can either be “full”, containing all data in a given snapshot, or “incremental”, containing only the differences between two snapshots. ZFS receive reads these send streams and uses them to re-create identical snapshots on a receiving system. "

[–] [email protected] 1 points 5 months ago* (last edited 5 months ago) (1 children)

Hm, so send doesn't "create the same state, bits and snapshots" on the other side. Instead it "adds net new snapshots" on the other side. 🤔

Perhaps I could use send instead of Syncthing after all. But then again I'm typically syncing net new data so the optimization would be minimal.

[–] [email protected] 1 points 5 months ago

I believe there is a method to do a 1-1 build copy, but my expertise ends at this point