gavin you mentioned costs, those are only incurred with xen if you need the extra features such as server migration and other features. also if you dont need those extra features couldnt you just live with the free version of xen.
On Wed, Jan 27, 2010 at 11:42 AM, Geoff Galitz <[email protected]> wrote: > > > I've had the good fortune to be in the HPC and also HA business for a few > years (10 years for HPC but only about 4 for HA). Given the current > approach for virtualization I don't see that Xen or other virtualization > technologies are good for HPC environments if the performance is a > paramount > concern. > > Virtualization in an HPC/HA world is mostly beneficial for portability and > fail-over. But the added layer for a hypervisor will be significant if > your > jobs run for an extended period of time. I've seen jobs that run for > months... a 7% performance penalty (fairly typical in my experience) over > the course of a month is significant. > > > > --------------------------------- > Geoff Galitz > Blankenheim NRW, Germany > http://www.galitz.org/ > http://german-way.com/blog/ > > > > _______________________________________________ > Beowulf mailing list, [email protected] sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > -- Jonathan Aquilina
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