[libvirt] using sync_manager with libvirt

[Andrew Cathrow]

----- "Perry Myers" <pmyers at redhat.com> wrote: 
> From: "Perry Myers" <pmyers at redhat.com> 
> To: "David Teigland" <teigland at redhat.com> 
> Cc: libvir-list at redhat.com 
> Sent: Sunday, August 22, 2010 12:13:16 PM GMT -05:00 US/Canada Eastern 
> Subject: Re: [libvirt] using sync_manager with libvirt 
> 
> On 08/19/2010 01:23 PM, David Teigland wrote: 
> > On Thu, Aug 19, 2010 at 11:12:25AM -0400, David Teigland wrote: 
> >> I'm only aware of one goal, and the current plan is to implement it 
> >> correctly and completely. That goal is to lock vm images so if the vm 
> >> happens to run on two hosts, only one instance can access the image. 
> 
> Ok. So for the first implementation of sync_manager it will still be 
> possible for someone to corrupt data by configuring two separate vms to 
> accidentally use the same storage volumes. That's fine for the first 
> pass, just something to keep in mind for later. 

Presumably it'll use support the <shareable/> flag for shared disks. 
> 
> > (That's slightly misleading; technically, the lock prevents a second qemu 
> > process from even being started.) 
> 
> ack 
> 
> Perry 
> 
> 
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