We're changing our SAN shortly and I'm putting together the procedure / config now for the shared storage. This will be based on XFS on top of clustered LVM2 via Pacemaker.
I've implemented the exclusive=yes directive on the LVM resources (volume groups) but I am still able to mount on both cluster nodes (2 node cluster) in my testing environment. I would have thought that this directive would prevent multiple mounting / VG activation given that even when there are no cluster comms (this is how i create the split brain, and reboot both nodes) the storage is available to both nodes ? What is the recommended way of guaranteeing storage exclusiveness in this (albeit unlikely) situation where both nodes think they are running by themselves ? I've looked at sdb and sfex but have previously been steered away from them. Dave
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