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Re:BorgBackup, Deduplicating archiver with compression and e... by XorNot on Tuesday December 27, 2022 @06:27PM (#34155317)
ZFS snapshot thing was also a huge pain with bup back in the day. I remember doing some work to add in a path graft system for it but it never got merged.

Backup tool authors never seem to support this use case.

Re:BorgBackup, Deduplicating archiver with compression and e... by Freaky on Tuesday December 27, 2022 @09:17PM (#34156763)
This is why I made https://github.com/Freaky/zfsnapr

Instead of working out how to teach my backup tools about snapshots, I just mount them in a subtree and use that as a chroot env.