Re: [Xen-users] Xen and GFS

[Jim Klein <jklein@xxxxxxxxxxxxxxxx>]

The setup I have is 3 - AMD_64DP server blades w/ 4Gb RAM each,  
attached to FC SAN. The thought was that I would create a GFS volume  
on the SAN, mount it under Xen dom0 on all 3 blades, create all the  
VBDs for my VMs on the SAN, and thus be able to easily migrate VMs  
from one blade to another, without any intermediary mounts and  
unmounts on the blades. I thought it made a lot of sense, but maybe  
my approach is wrong.
On Apr 18, 2006, at 1:00 PM, John Madden wrote:

> > Does anyone have any pointers with regard to using Xen and storing
> > VBDs on a GFS volume under dom0? This sounds like it should work
> > well, especially for migrating domains, but it looks as though GFS
> > won't allow a read-write mount of a loop device (file) so I end up
> > with read only VBDs on the SAN, which are obviously useless. Maybe my
> > approach is completely off, but it sounded pretty good up until I
> > discovered the lock problem. FYI, the gfs error when mounting is
> > listed below.
> Sorry to not actually help, but what do you need GFS for if you  
> have a SAN?
> You can't have multiple copies of the same domU writing to the lun  
> at once,
> so what purpose does a cluster filesystem serve?
>
> John
>
>
> --
> John Madden
> Sr. UNIX Systems Engineer
> Ivy Tech Community College of Indiana
> jmadden@xxxxxxxxxxx

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