Re: [Xen-users] question about disk = [ 'phy:/dev/vg1/vol1, sda, w!' ] construct

[Sadique Puthen <sputhenp@xxxxxxxxxx>]

Imre Oolberg wrote:
> Hallo!
>
> The other day i browsed thru readings about Xen, esp.
>
> http://www.virtuatopia.com/index.php/Adding_Disk%2C_CDROM_and_DVD_Devices_to_a_Running_Xen_domainU_Guest_System#An_Overview_of_xm_block-attach
>
>
> and encountered an interesting construct about having multiple domU to
> have rw access to the same storage simultaneously like that
>
> disk = [ 'phy:/dev/vg1/vol1,sda,w!' ]
>
> Though xm man page or xm create --help_config does not mention it
> neither on Debian Etch (v 3.0) or on Ubuntu Hardy (v 3.2) it seems to
> work (i tried it very briefly under Ubuntu Hardy (8.0.4, latest
> stable, 64 bit version).
>
> Since i am interesting to try out Oracle RAC configuration it could be
> very handy to use Xen for that purpose. If anybody could give a
> comment or share experience about the status of that paticular 'w!'
> option, it would be very good! I.e. is it suitable also for production
> use etc.

It's suitable provided you use a clustered filesystem.

--Sadique

>
>
> Thanks and best regards,
>
> Imre
>
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> http://lists.xensource.com/xen-users
>


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