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

[Imre Oolberg <imre@xxxxxxxxxxx>]

Hallo!

Thank you for the reply, and yes exactly, i have in mind using such a 
kind of application which takes responsibility for accessing 
simultaneously the same device from several places.
I am also interested if on Xen with this w! options is Oracle RAC known 
to work? I have in mind Oracle 10R2 database version 10.2.0.4.0, 64bit, 
and intention is to use SLES10 as domU operating system, i believe i am 
quite free choosing dom0 operating system.
Before i discovered w! option i have used shared storage over iscsi but 
w! seem to be more straight-forward.
Imre

Sadique Puthen wrote:
> 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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> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
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