Re: [Xen-users] Xen and InfiniBand

[Casper <kl@xxxxx>]

Hi,

I was interested, is anybody setup IB on Dom0 without IB-over-IP?
I can`t get any manual to try understand it...

thanx,

Casper

Francesco Polzella wrote:
> > Hello list,
> >
> > I'm planning to set up a cluster with an Infiniband interconnection 
> > network. The cluster consists of multiple PCs - each equipped with two 
> > Intel XEON 64bit QuadCores and providing up to 7 virtual XEN instances.
> > I'm very new to IB, so my questions are:
> >
> > 1) Is there a tutorial about XEN and IB available?
> >
> > 2) Is IB supported by the XEN kernel?
> >
> > 3) Which IB adapters are supported?
> >
> > 4) Is ist possible that the virtual xen instances (DomNs) share the IB 
> > adapter
> > and provide XEN bridging or natting solution similar to Ethernet?
> >
> > 5) What differences exist when using IB between paravirtual
> > XEN instances and Hardware Virtual Machines?
> >
> > Hope for feedback
> > Christian Stenzel
> >   
> Hi,
> some time ago I' have worked on IB in a xen virtual cluster environment.
> As far as I can remember a driver to use IB directly in the DomU was in 
> early stage of development;
> we had to use a module (in the Dom0) that create a fake eth interface 
> that let you to access IB
> from the domU like a standard eth (IP-over-IB solution).
> Using this kind of solution the network performance between DomUs 
> dropped of about 50% respect to the nominal band provided
> by the IB device.
>
> The IB board was based upon a Mellanox  chipset and gave no particular 
> problems.
> Let me know if you find something new.
>
> Bye
>
> Francesco Polzella
>
>
>    
>
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