[Beowulf] 1.2 us IB latency?

[Joe Landman]

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.


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Joseph Landman, Ph.D
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