Re: [Qemu-devel] QEMU redesigned for MPI (Message Passing Interface)

[Avi Kivity]

On 11/17/2009 02:20 PM, Paul Brook wrote:
> > What you're describing is commonly referred to as a Single System
> > Image.  It's been around for a while and can be found in software-only
> > verses (pre-Xen VirtualIron, ScaleMP) and hardware-assisted (IBM, 3leaf).
> >      
> Or better still do it at the OS level (e.g. OpenSSI).
>    

This is at best incredibly difficult since you have to cluster a huge 
program (Linux).  If the OS is closed it's impossible even to start.

If you do this at the virtualization level all you need is distributed 
shared memory for guest RAM and clustering at the qemu level.  If each 
node gets its own PCI bus it shouldn't be too difficult.

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