Gerrard Geldenhuis wrote: > Excellent, thanks for the answer, that makes it a lot clearer. > > > > So coupled with exclusion lists etc.. I could have multiple machines > connect to one LUN and each have its own logical volume. Is there a > concept of a “master” in the cluster or does it work in the same way as > tcp with an exponential backoff when the metadata is locked by a host > for changing. I am assuming that cluster aware locking would allow > server-a to create a new lv but not simalteneosly allowing server-b to > create a new lv too. > > > > I know should be experimenting with this but will ask in the mean time > while I wait for my “test lun”. > > > > If host A creates a lv on a shared storage will it automatically be > marked as only belonging to host A or is that something you have to do > by hand. I read somewhere in the man pages about tags that you need to > add to achieve such things. > Locking in CLVM is exclusive and there's no back off. There is no reason for it, creating an LVM doesn't take very long and is done from a command-line. Host 'b' will simply wait until host 'a' has finished its job. If you need to mark LVs to be exclusive to a node you will need to use tags to define which node is allowed access _______________________________________________ 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/
