That is fairly obvious, a lot of systems provide snapshot functionality irrelevant of the file system. If you still need snapshots, there are several methods w

That is fairly obvious, a lot of systems provide snapshot functionality irrelevant of the file system. If you still need snapshots, there are several methods without needing CoW Filesystems, notably LVM and dattobd (both of which I have utilized in the past) Also keep in mind that a pure snapshot from a running system will behave like a system that just crashed, a half written file won't complete the write magically because you have snapshot. If you don't tell postgresql that you're doing snapshots or backups, both will likely corrupt data, doesn't give you anything in that case. Same for desktop systems. You make a snapshot of the runnign system and suddenly the browser only finds corrupted settings because a write wasn't complete until after the snapshot.