Vinum status
Lukas Ertl
le at FreeBSD.org
Mon Aug 2 09:35:45 PDT 2004
On Mon, 2 Aug 2004, Paul Mather wrote:
> I'm happy to report that the current geom_vinum kernel module
> successfully detects all plexes during boot when loaded from
> /boot/loader.conf. So, I now have a working root-on-gvinum setup
> running (including swap-on-gvinum). Thanks!!
Now that's very good news! Thanks for testing it!
> My only question is that although writes go to both disks in my mirrored
> setup, reads are only done from one disk of the mirror. In my case, all
> reads are always to drive ad2 of my ad0+ad2 mirror. This implies to me
> a default "readpol prefer <someplex>" on my defined volumes rather than
> the "readpol round" that appears to be the default under vinum. (At
> least on my 4.10-STABLE system, both drives are used for reads, implying
> a "readpol round" default behaviour.)
Yes, I still need to implement some details. Round-robin reads is one of
them.
> Does gvinum support "readpol round" or is it just that its default
> differs from the old vinum? If the latter, is there a way to change the
> read policy on a volume without deleting the old volume or otherwise
> destroying its contents? The vinum configuration I'm using is an exact
> duplicate of a 5.1-RELEASE system I created. That system (since
> upgraded to 5.2.1-RELEASE-p9) also sends reads to both drives using
> vinum.
Yes, I'll make these config changes possible without dumping and
restoring. :-)
> (Will you link the kernel module into the normal kernel build? I forgot
> it wasn't the first time I built my kernel, and had to go back and build
> manually the geom_vinum module when I couldn't find it to load when at
> the boot loader prompt. Ditto for including gvinum in the regular
> userland build process.)
Yes, it's about time to hook them up. :-)
thanks,
le
--
Lukas Ertl http://homepage.univie.ac.at/l.ertl/
le at FreeBSD.org http://people.freebsd.org/~le/
More information about the freebsd-current
mailing list