5 ms·

Btrfs yes, ext4 no (but I believe xfs does). This should end up being exposed through cp --reflink=always, so you could look up filesystem support for that.

• danudey 3y ago
  XFS does, I've used it for specifically this feature before.
• cmurf 3y ago
  cp defaults to reflink=auto for a while now, but of course some distros are way behind on coreutils.