> > so it was checking LVs to see if they > > were PVs ... > > The solution was to use "filter" in lvm.conf like this: > Could you check upstream CVS version of lvm2 with 2 extra patches: > (not yet upstream) > > https://www.redhat.com/archives/lvm-devel/2012-March/msg00171.html > https://www.redhat.com/archives/lvm-devel/2012-March/msg00172.html > > Whether your slow PV operations are solved ? Patch #2 seems to apply when they are a lot of PVs. In our case, we have very few PVs and a lot of LVs, so I don't think it would affect us. Patch #1 is a bit less clear to me. Is it applicable to an environment with few PVs? -- Ray Morris support@bettercgi.com Strongbox - The next generation in site security: http://www.bettercgi.com/strongbox/ Throttlebox - Intelligent Bandwidth Control http://www.bettercgi.com/throttlebox/ Strongbox / Throttlebox affiliate program: http://www.bettercgi.com/affiliates/user/register.php On Tue, 27 Mar 2012 16:31:49 +0200 Zdenek Kabelac <zkabelac@redhat.com> wrote: > Dne 26.3.2012 22:55, Ray Morris napsal(a): > > Put -vvvv on the command and see what takes so long. In our case, > > it was checking all of the devices to see if they were PVs. > > "All devices" includes LVs, so it was checking LVs to see if they > > were PVs, and activating an LV triggered a scan in case it was > > a PV, so activating a volume group was especially slow (hours). > > The solution was to use "filter" in lvm.conf like this: > > > > filter = [ "r|^/dev/dm.*|", "r|^/dev/vg-.*|","a|^/dev/sd*|", > > "a|^/dev/md*|", "r|.*|" ] > > > > That checks only /dev/sd* and /dev/md*, to see if they are PVs, > > skipping the checks of LVs to see if they are also PVs. Since the > > device list is cached, use vgscan -vvvv to check that it's checking > > the right things and maybe delete that cache first. My rule IS > > a bit redundant because I had trouble getting the simpler form > > to do what I wanted. I ended up using a belt and suspenders > > approach, specifying both "do not scan my LVs" and "scan only > > /dev/sd*". > > Could you check upstream CVS version of lvm2 with 2 extra patches: > (not yet upstream) > > https://www.redhat.com/archives/lvm-devel/2012-March/msg00171.html > https://www.redhat.com/archives/lvm-devel/2012-March/msg00172.html > > Whether your slow PV operations are solved ? > > Zdenek > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ > _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
