[Beowulf] clustering using xen virtualized machines
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Geoff Galitz geoff at galitz.orgWed Jan 27 02:42:48 PST 2010
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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/
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