[Beowulf] 1.2 us IB latency?

Joe Landman landman at scalableinformatics.com
Tue Mar 27 16:35:37 PDT 2007

Peter Kjellstrom wrote:

>> also, I'm sorta amazed people keep selling (and presumably buying)
>> dual-port IB cards.  doesn't that get quite expensive, switch-wise?
> Not defending them but, It could possibly maybe be useful if you have a 
> stand-alone IB net for, say, storage or something else not mpi. Also, it's 
> not like they're that much more expensive than single port ones...

They aren't terrible.  The dual port cards can be good for multi-path to 
IB connected storage.  Similar to multi-connected FC, but a bit faster.

Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics LLC,
email: landman at scalableinformatics.com
web  : http://www.scalableinformatics.com
phone: +1 734 786 8423
fax  : +1 734 786 8452
cell : +1 734 612 4615

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