Re: RHEL 3.0 Cluster + LVM

[Alasdair G Kergon <agk redhat com>]

On Thu, Jun 03, 2004 at 09:42:18AM -0400, Rik van Riel wrote:
> I suspect LVM1 will be safe as long as you never change the
> LVs, except when the other cluster node is down...
 
Yep - it's not supported because you have to do your own locking to ensure that
you're never in a situation where the two kernels believe the LVM configuration
is different.

e.g. For most types of changes the following procedure should work: deactivate
all volume groups (vgchange -an) on node 1 before making changes to them on
node 2 (can still be active on this node), then either reboot node 1, or
(equivalently from LVM's perspective) reset the kernel driver (lvmchange -R)
and vgscan -f before reactivating.


Alasdair
-- 
agk redhat com