Re: [Xen-users] Clustering

[Jonathan Tripathy <jonnyt@xxxxxxxxxxx>]

On 06/04/2011 16:00, Jeff Sturm wrote:
> > -----Original Message-----
> > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-
> > bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Miles Fidelman
> > Sent: Wednesday, April 06, 2011 10:15 AM
> >
> > You might want to google "single system image" and take a look at
> > http://www.kerrighed.org
> >      
> Distributed shared memory is a hard problem (consider how you'd
> implement an efficient spinlock, for example).  Google for
> "Cache-Coherent Distributed Shared Memory", e.g.
> http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.83.8174&rep=rep
> 1&type=pdf.
>
> Even simple NUMA architectures are not well supported by modern
> software.  Unfortunately it seems such machines are more theoretical
> than practical at this time.
Ah well.

I'm still in deep thought about distributing raw CPU power across 
multiple machines for Xen DomUs. Does Amazon really only run their DomUs 
on single boxes? So their marketing that says "Elastic Computing" is 
just a simple stop DomU, change config file, resize lvm volume and 
restart DomU?
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