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Re: [libvirt] using sync_manager with libvirt





----- "Perry Myers" <pmyers redhat com> wrote:
> From: "Perry Myers" <pmyers redhat com>
> To: "David Teigland" <teigland redhat com>
> Cc: libvir-list 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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