On Sun, 11 Mar 2018, Gordon Messmer wrote:
On 03/10/2018 05:24 PM, Stephen Morris wrote:
> I can't find the documentation any more, but I have found
> documentation on how to use copy the create the target as a hard
> link or as a soft link. It is possible I have incorrectly
> remembered what I had read, or it is possible over time that the
> standard copy functionality has changed and now you have to
> explicitly specify that you want that functionality.
I'd forgotten the other system that works as you described: reflink.
"cp" supports a --reflink option, and on a few filesystems that
implement it (btrfs, OCFS2, maybe xfs and zfs, I'm unclear on their
status), you can create a CoW copy of a file.
Again, not standard behavior, not widely implemented, and relatively
new, but this might be what you were thinking of.
ok, that's cool, i had no idea that even existed.