Myrinet against ethernet
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Posted by on March 11, 2008, 11:47 pm
Please log in for more thread options propreitory ? Does it follow the same protocol ? Can NICs work interchangeably in both the standards ? It would be great if somebody helps me out on the differences between the two . | ||||||||||||||||||||||||||||||||||||||||
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Posted by Michelot on March 12, 2008, 5:55 am
Please log in for more thread options ...and, if possible, about the compatibity between 10 Gbit/s Ethernet and Myrinet. Best regards, Michelot | ||||||||||||||||||||||||||||||||||||||||
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Posted by Rick Jones on March 12, 2008, 2:19 pm
Please log in for more thread options > > It would be great if somebody helps me out on the differences between
> > the two . > ...and, if possible, about the compatibity between 10 Gbit/s Ethernet
> and Myrinet. I suspect the best source would be: http://www.myricom.com/ Where I think you will find that _myrinet_ is a proprietary networking technology that is not directly compatiable with 10Gbit/s Ethernet, and that Myricom also offer 10 Gigabit Ethernet products. rick jones -- oxymoron n, Hummer H2 with California Save Our Coasts and Oceans plates these opinions are mine, all mine; HP might not want them anyway... :) feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH... | ||||||||||||||||||||||||||||||||||||||||
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Posted by Michelot on March 13, 2008, 8:28 am
Please log in for more thread options Bonjour Rick,
> http://www.myricom.com/
Thanks for the link, I should have known it. "...these Myri-10G protocol-offload Network Interface Cards (NICs) deliver excellent performance at minimal cost, and are fully compliant with Ethernet standards". What I'm understanding is that. The word offload seems important, and not easy to translate in French. The Myri-10G is using the same PHY protocol than Ethernet (the same physical level). But, the level-2 protocol is not "MAC 802.3" (MAC Ethernet). "MAC 802.3" and "level-2 Myri-10G" are sharing the same "PHY Ethernet" protocols, that are the 10GBase-CX4 and the 10GBase-R family. There is the same thing with IBM FICON protocol avec Fibre Channel. The physical level for FICON is same as the physical level of FC, but the frame level is different. So, the equipments that interpret the level 2 have to be differencied. A Myri-10G switch is not an Ethernet switch. But we can transport a Myri-10G wavelength as a 10GBase-R wavelength. It is my understanding at this moment. Best regards, Michelot | ||||||||||||||||||||||||||||||||||||||||
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Posted by glen herrmannsfeldt on March 13, 2008, 10:41 am
Please log in for more thread options Michelot wrote:
(snip) > The word offload seems important, and not easy to translate in French.
> The Myri-10G is using the same PHY protocol than Ethernet (the same > physical level). But, the level-2 protocol is not "MAC 802.3" (MAC > Ethernet). Offload in the case of computer hardware usually means it performs some function that is normally (or previously) done in software. In the past, some NICs would do the TCP checksum calculation such that the TCP/IP software didn't have to do it. As networks get faster it is harder for software to keep up. -- glen | ||||||||||||||||||||||||||||||||||||||||
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> the two .