On Fri, Oct 22, 2021 at 3:21 PM Helmut Jarausch <jarau...@skynet.be> wrote: > > Is it possible to have a hard link from one subvolume to a different > one?
You could do a quick test, but I don't think so. I haven't used btrfs in years but they're basically separate filesystems as far as most commands are concerned. I don't think you can create reflinks between subvolumes either. The files are already reflinked by design though. You'd just make a new snapshot and then rsync over it. Anything that doesn't change will already share space on disk by virtue of the snapshot. Anything that does change will only be modified on the snapshot you target with rsync. I'm not sure why you'd want to use a hardlink - it doesn't provide the isolation you already get from the snapshot. -- Rich
