ZFS is a also a good way to get consistent fast backups of databases by snapshotting. By ZFS copy-on-write its incremental by nature as it you only have to send

ZFS is a also a good way to get consistent fast backups of databases by snapshotting. By ZFS copy-on-write its incremental by nature as it you only have to send over deltas incremental streams. Thus for site-to-site backups its usually very fast! Another advantage compared to rsync is that you do not need to directory traverse the whole file system in order to find the differences, I believe its similar to BTRFS in that aspect. Then there is the feature that ZFS has checksums, so that when you write to disk you know what you get otherwise you can get corruption. RAID5-60 for me is a gamble that you can get hidden write disk errors unless there is checksums in software on a higher layer. Always scrub your ZFS source and backup pool.