Re: [Xen-users] Sharing space on a SAN?

[Olivier Le Cam <Olivier.LeCam@xxxxxxxxxxxxxxxxxxxxx>]

Peter Van Biesen wrote on Sep 8, 2008:
> We tested that too. It is overkill and degrades performance.
>
> Simply attach the raw lun's to your domu ( /dev/disk/by-id ) and allow all you 
> dom0's to see them. live migration works perfectly then.
>
> A little warning : every lun should only be allowed to be accessed by 1 domu or 
> dom0, unless the filesystem on it is able to handle multiple systems. Booting 
> your domu on two systems on the same lun will result in massive datacorruption.
>
> We have been using this setup for over a year now and had no problems whatsoever - provided you check every domu has only been started once AND every lun is attached to only one domu ( typo's can happen ). We're using a simple script to check all that before we start a domu. There are also a lot of xen linux clustering projects around that can help you, just google them. 
>
> Kindest regards,
>
> Peter.
Hi -

My SAN is able to provide up to 32 lun's, which is quite 	insufficient 
for the number of domUs I need: I've got 5 dom0s, which I intent to run 
+/- 10 domUs per dom0s on. Some of them are databases with a dedicated 
logical drive on the SAN for the datas in additition to the root 
filesystem, which means 2 lun's per domUs in that case.
What could you suggest in that situation?

Thanks in anticipation,
--
Olivier Le Cam
Education Headquaters, Versailles, France


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