[Beowulf] fast interconnects
James.P.Lux at jpl.nasa.gov
Fri May 19 08:49:19 PDT 2006
Just got back from a High Speed Digital Interconnection Workshop and some
stuff of interest to cluster'ites..
a) There's likely to be 10Gbps ethernet over ordinary cat 5e/6 cabling
soon. (Solarflare is one company working on it)
b) There's some interesting work from companies like Fulcrum on very fast
switches using asynchronous logic. Several vendors are pushing to get (very
fast) Ethernet used as a replacement for processor/processor interconnects
and to replace things like Fiberchannel for I/O. They have an architecture
that essentially routes with zero copy inside the switch. I can't remember
the latency for the switch, but it's down in the hundreds of nanoseconds area.
c) for high speeds, circuit switching is where it's at, rather than classic
store and forward packet switching.
James Lux, P.E.
Spacecraft Radio Frequency Subsystems Group
Flight Communications Systems Section
Jet Propulsion Laboratory, Mail Stop 161-213
4800 Oak Grove Drive
Pasadena CA 91109
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