[Pkg-zfsonlinux-devel] Bug#595790: hostid: useless unless fixed

[Darik Horn]

> I'd suggest an application-specific UUID incorporating the hostname.

I expect that ZoL will remove or disable the hostid check when Illumos
implements the Multi Reader Protection feature, or something like it
for HA configurations.  The behavior in question is a nonessential
holdover from Solaris that fits poorly into Linux systems.

When I wrote commit 0d54dcb5 to improve /etc/hostid handling on
Debian, which was quoted earlier, we briefly discussed using the
/var/lib/dbus/machine-id file instead, but decided that it wasn't
worthwhile because it wouldn't solve the underlying problem.

That said, I still don't understand the issue that is motivating this
discussion. Changing the return of hostid() after initial system
configuration will break a non-zero number of systems running legacy
software, and status quo has been okay with existing users since
forever.

-- 
Darik Horn <dajhorn at vanadac.com>