[Beowulf] clustering using xen virtualized machines

Geoff Galitz geoff at galitz.org
Wed Jan 27 02:42:48 PST 2010

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

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

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