Re: [Xen-users] Exporting a PCI Device

[Jan Kalcic <jandot@xxxxxxxxxxxxxx>]

Gerhard Possler wrote:
>
> well, Joris recommandation is valid anyway, and you will have less
> pains... but consider also NPIV (you will need an newer, kernel maybe
> not supported and also Xen 3.1 and of course the right HBA (4GB))
>
> when you do not have HBA's you may use iSCSI for your disks, but also
> here you must access the Storage from Dom0.
>
> happy testing ;-)
>
A new kernel and a newer xen version is unfortunately not a valid
solution for my scenario.

NPIV??

Thanks,
Jan
> Mit freundlichen Grüßen / with kind regards
> *Gerhard Possler*
> IT Architect
> IBM Enterprise Linux Services
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>
> *"Joris Dobbelsteen" <Joris@xxxxxxxxxxxxxxxxxxxxx>*
> Sent by: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
>
> 18.02.2008 16:51
>
>       
> To
>       "Jan Kalcic" <jandot@xxxxxxxxxxxxxx>, <deshantm@xxxxxxxxx>
> cc
>       xen-users@xxxxxxxxxxxxxxxxxxx
> Subject
>       RE: [Xen-users] Exporting a PCI Device
>
>
>
>       
>
>
>
>
>
> >-----Original Message-----
> >From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> >[ mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> <mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx> ] On Behalf Of Jan Kalcic
> >Sent: Monday, 18 February 2008 12:02
> >To: deshantm@xxxxxxxxx
> >Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> >Subject: Re: [Xen-users] Exporting a PCI Device
> >
> >Todd Deshane wrote:
> >>
> >> Hi,
> >>
> >> On Feb 17, 2008 6:34 PM, Jan Kalcic <jandot@xxxxxxxxxxxxxx
> >> < mailto:jandot@xxxxxxxxxxxxxx <mailto:jandot@xxxxxxxxxxxxxx> >> wrote:
> >>
> >>     Hi All,
> >>
> >>     just a quick question I could not figure out. Is there a way to
> >>     export a
> >>     PCI device to multiple VMs (para) keeping it available
> >to dom0? Xen
> >>     version is 3.0.4.
> >>
> >>
> >> As far as I know you can't. That is what virtual devices are
> >used for
> >> right?
> >>
> >> In what scenario would you want to grant direct access to a
> >PCI device
> >> in VMs and also in dom0?
> >>
> >Hi Todd,
> >
> >the PCI device which I would need to "share" is the fibre
> >channel card connected to two different storage, on of this is
> >the VMs repository which has to be visible to dom0 and the
> >other one is the data storage for VMs which, obviously, has to
> >be visibile to VMs. So the solution would be using two
> >different fibre channel cards, right?
>
> What I would do is make all storage available to the dom0 and use
> regular methods to export it to the domU.
> In other words: treat dom0 as a very fancy piece of hardware that's
> between your kernel and the fibre-channel attached storage. For generic
> solutions the Virtual Block Device should be fast enough, otherwise you
> should probably consider a separate server, dedicated to that single
> task.
>
> I don't know if you are going to loose any fibre-channel advantages, but
> I figure you also reduce administrative complexity to dom0's only.
>
> - Joris
>
>
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