On Mon, 2006-11-20 at 09:32 +0000, Patrick Caulfield wrote: > Nate Carlson wrote: > > Hey all, > > > > I'm building a new system with shared FC storage primarily to allow Xen > > virtual machines to be migrated between host systems. I'd like to be > > able to use LVM or some similar system that allows me to name my own > > volumes, but don't need shared storage, rgmanager, etc. What are the > > minimum requirements to just get clvm working? I'm assuming I don't need > > fence devices and such for this, as those are primarily used to ensure > > that a system is writing to a filesystem when it's not supposed to? > > Also, are there any alternatives to clvm that may be better suited for > > this case? > > If you don't need/have shared storage then I don't think you need clam at all. The whole point of clvm is to provide central and > cluster-coherent management of shared Logical volumes. > > However you do say you have shared storage, but don't need it which is slightly confusing! So assuming you do have AND want shared > storage then clvm will probably be able to help. It does require the Red Hat cluster suite components such as ccs/cman/dlm(or gulm) > but you can do without fencing and the other bits you mention. ? node A is running VM 1, which uses vg/lv 'vmroots/vmroot1' node A hangs someone starts VM 1 on node B node A recovers (visions of a mushroom cloud) I suppose there's local-only activation of clustered logical volumes, but do not know how that would prevent (or not) the above case from occurring. I probably missed something. -- Lon -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
