Re: [Xen-users] Xen and InfiniBand

[Christian Stenzel <christianstenzel@xxxxxxx>]

Hello,

I've found a document from Mellanox explaining two principle solutions 
to provide IB to DomUs.
I would prefer the second one.

Does someone know more about the implementation status of that project?




Casper schrieb:
> 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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