RE: [Xen-users] Shared storage between Domu's

["Niv Elad" <NIVE@xxxxxxxxxx>]

Hi Mat

Thank for your reply.
The "w!" did work.

I am using an ocfs2 fs type on the shared devises so that should keep it
safe.

Cheers

-----Original Message-----
From: Petersson, Mats [mailto:Mats.Petersson@xxxxxxx]
Sent: Thursday, March 08, 2007 5:10 PM
To: Matt Okeson-Harlow; Niv Elad
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-users] Shared storage between Domu's



> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Matt
> Okeson-Harlow
> Sent: 08 March 2007 15:09
> To: Niv Elad
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] Shared storage between Domu's
>
> Niv,
>
> Setup NFS/AFS/Samba on a domU and share your disk that way?
> Xen won't let you mount a slice in two domUs that I am aware of.

As described in the two other post on this subject, you can share it,
but you have to have a file-system that is "shareable". And you need to
use "w!" instead of "w" to tell Xen that "Yes, I know I'm sharing this
file-system" [and if you actually don't care about the content of your
disk-image or the overall stability of your domain, you can of course
force multiple domains to access the same disk-image even if it's not
actually shareable - but that's like playing with matches in a petrol
station...]

--
Mats
>
> On Thu, Mar 08, 2007 at 03:28:13PM +0200, Niv Elad wrote:
> >
> > Hello
> >
> > I have two domains running on the same Dom0.
> > I want to allocate shared disk  to both of them (i want to simulate
> > cluster envinroment).
> >
> > Does anyone know whether this is possible and if so how can
> it be done?
> >
> > This is my disk defenition for the domains -
> >
> > DomU1:
> >
> disk=['phy:vgxen01/lv_linva04_hda,hda,w','phy:vgxen01/lv_linva
> 04_06_hdb,
> > hdb,w']
> >
> > DomU2:
> >
> disk=['phy:vgxen01/lv_linva06_hda,hda,w','phy:vgxen01/lv_linva
> 04_06_hdb,
> > hdb,w']
> >
> > When trying to start second DomU i am getting the following -
> >
> > Error: Device 5632 (vbd) could not be connected.
> > Device /dev/vgxen01/lv_linva04_06_hdb is mounted in a guest domain,
> > and so cannot be mounted now.
> >
> >
> > Cheers
> >
> > Niv
> >
> >
> > This message and the information contained herein is
> proprietary and confidential and subject to the Amdocs policy
> statement,
> > you may review at http://www.amdocs.com/email_disclaimer.asp
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> > http://lists.xensource.com/xen-users
>
> --
> att Okeson-Harlow
> Sen gutoj malgrandaj maro ne ekzistus
>



This message and the information contained herein is proprietary and 
confidential and subject to the Amdocs policy statement,
you may review at http://www.amdocs.com/email_disclaimer.asp

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