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Re: usrmerge -- plan B?

On Mon, Nov 26, 2018 at 09:29:50AM -0500, Michael Stone wrote:
> On Mon, Nov 26, 2018 at 03:08:09PM +0100, Marco d'Itri wrote:
> > I disagree both that simple testing (that you could do with a KVM
> > snapshot as well) would be hard and I disagree that the benefits of
> > merged-/usr would be minor.
> Nobody has thus far pointed out a single benefit to someone merging usr on
> an ordinary system.

Nor for clusters, for that matter.  I don't get how having the /usr part of
the filesystem (no /var, /lib, /etc, etc) would help -- and there's so many
tools that don't care about individual directories that I'd recommend you
to instead use one of:
 * btrfs
 * overlayfs
 * zfs
 * lvm
 * dm_*
 * even a bunch of mounts
rather than your scheme that requires the rest of the world to adapt to it.

⢀⣴⠾⠻⢶⣦⠀ We domesticated dogs 36000 years ago; together we chased
⣾⠁⢰⠒⠀⣿⡁ animals, hung out and licked or scratched our private parts.
⢿⡄⠘⠷⠚⠋⠀ Cats domesticated us 9500 years ago, and immediately we got
⠈⠳⣄⠀⠀⠀⠀ agriculture, towns then cities.     -- whitroth on /.