----- "Jeremy Katz" <katzj(a)redhat.com> wrote:
Not usefully -- you can string together some 'dm table'
commands and
get the number of blocks used but it requires being root and also had
some oddities.
My kingdom for an upstreamable unionfs :/
We use "aufs" to union a COW filesystem for our custom "Live" system.
It does seem a little odd that many of the other distros now use a union filesystem
approach to LiveCDs and NFS read-only roots but Fedora has for the time being stayed away
from it. It's not like there isn't lots of custom stuff being put into
fedora/redhat kernels that isn't yet upstream. In fact there was a discussion about
getting UnionFS upstream recently on the kernel list....
Saying all this the dm-snapshot approach will be more efficient space wise as it works
with blocks instead of whole files.
Daire