Re: [Xen-users] High availability and live migration with just LVMand hardware fencing

[Javier Guerra Giraldez <javier@xxxxxxxxxxx>]

On Wed, May 19, 2010 at 1:27 PM, Bart Coninckx <bart.coninckx@xxxxxxxxxx> wrote:
> What would you define as "change anything"? Add a LV?

for example, or expanding one, or deleting.  or adding a PV...

>  I suppose a "lvscan" on
> every node would take care of the changes, no?

yes, but what about the time between the change and the lvscan on all
nodes?  during that time, nonupdated nodes have a wrong idea of the VG
structure, and that is deadly dangerous.

> Or does it mean I cannot Âtake
> a snapshot? Or resize? Or all?

nothing that modifies the LVM metadata.


-- 
Javier

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