[Beowulf] Broadcast - not for HPC - or is it?

[Mark Hahn]

> Are you really claiming <9ns port to port ?

it sounds like they are, but it's nothing like a switch:
http://www.zeptonics.com/Home/opticast-faq

> Plus as others say it is not the broadcast that is the hard bit - it is 
> getting the consolidated acks back.

the device is really just a hub afaikt.
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