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Re: [Xen-users] Windows DomU on NAS

On Tue, Apr 21, 2009 at 10:12:35AM -0700, Chris Black wrote:
> Thanks for the tips guys!
> So to recap, to expand the drive. I allocated more space to the Volume  
> in Equallogic, did a logout and login on Dom0 of the iSCSI target.  
> Restarted DomU and then used "Disk Management" to expand the C drive  
> onto the new space. Worked great!
> Now, I was also wondering about any performance or other issues there  
> might be with using an iSCSI DomU?

Well, domU doesn't know anything about the disk being on iSCSI, so it's all
up to dom0 configuration.. 

So make sure your iscsi-initiator, network and possible multipath settings
are correct and well tuned on dom0, and you should be all fine. 

You can benchmark the iSCSI LUN on dom0 to make sure everything on your dom0
and on your network and SAN are correct.

Equallogic storage performs well, so that shouldn't be a problem, and it offers
good monitoring features to see what's happening and where the possible 
bottlenecks are. 

-- Pasi 

> Thanks!
> On Apr 21, 2009, at 9:29 AM, David Miller wrote:
> >You will need to run diskpart.exe in Windows to expand any  
> >filesystems once it sees the new size.
> >--
> >David
> >
> >On Tue, Apr 21, 2009 at 12:22 PM, Pasi Kärkkäinen <pasik@xxxxxx>  
> >wrote:
> >On Tue, Apr 21, 2009 at 08:59:14AM -0700, Chris Black wrote:
> >> Hello,
> >>
> >> I'd like to be able to create a windows DomU which is to be stored  
> >on
> >> a NAS (Equallogic) device.
> >
> >Equallogic is SAN storage, not NAS.
> >
> >NAS == file storage (SMB, CIFS, NFS).
> >SAN == block storage (iSCSI, FC)
> >
> >> I was wondering if anyone has any best
> >> practices on how to do this? Is there a way to extend the DomU C  
> >drive
> >> once you create the initial device, etc? Any suggestions would be  
> >great.
> >>
> >> I have already tried this by just using a phy:/dev/path-to-iscsi- 
> >mount-
> >> point and it appears to be working great. But I'm unsure of how
> >> stable, performance problems, etc this would cause? I've also so far
> >> been unable to find a way to extend the drive if I add space to the
> >> volume on the Equallogic device.
> >>
> >
> >After resizing the Equallogic iSCSI LUN on dom0 you need to shutdown  
> >the domU and
> >reboot it to see the new size.
> >
> >Then you need to possibly re-partition the disk on domU, then resize  
> >the
> >filesystem on the partition etc.
> >
> >-- Pasi
> >
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> >

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