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

Matt Hurd matthurd at acm.org
Fri Oct 8 08:40:28 EDT 2010


>>
> So if you want another offbeat idea on how to do broadcast on a large
> cluster  - what about wireless ?
> (although again, you can't get realistically reliable transport with
> checking acks )
>
> Daniel
>
Nice idea.  Perhaps not so offbeat.  Though bandwidth and radio don't
go too well together normally.

Know some guys here in Australia that are doing extremely accurate
timing with wireless, not for timing's sake but to measure movement in
dam walls and other infrastructure.  Kind of like a localised GPS.
They have some very neat and accurate stuff.

Had a play with some radio foo and managed to get about 880ns + air
time on bit to bit from tx to rx but haven't quite figured out how to
get super low latency yet.  I think there may be a product in there
for wireless PPS dissemination for accurate timing to a cluster like
the guys do with the dam walls but I'm not sure if people really need
much more than what ptp can already do.

--Matt.

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