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Supercomputer To Use Optical Router
Izmunuti writes "From a NYTimes article: 'Highlighting a radical departure in the design of the fastest computers, the California Institute for Telecommunications and Information Technology plans to announce on Monday that it will use an optical router
designed by a Texas company as the heart of a
campus-wide supercomputer that will be woven together with optical fibers.'"
When it comes down to it, the computers do the work. You can do useful supercomputing with almost no networking, you can't do useful supercomputing with blindingly fast networks and no computers.
(Somehow, the quote reminds me of people who think that managers and lawyers are the important part of a company, and engineers and customer service are a nuisance to be minimized.)
Anyway, we're about pushing the limits of copper, with 1000bT, and I'd imagine network speeds will only continue to climb with increased use of fiber. I can see, in 5 to 10 years, optical switches becoming more common in office environments as file sizes and network speeds continue increasing.
I think perhaps you're a bit confused, my friend. It _is_ digital in that it's sending information as numbers, it's just carrying those numbers on an analogue signal.
The medium isn't important in digital, it's the message. Whether I send you a sequence of 20,000,000 numbers via carrier pidgeon or blue/green modulated laser light isn't important (other than latency) - it's the fact that those 20,000,000 numbers got from A to B via some means other than picking them up and carrying them.
So, we are all digital now, and have no need to go back.
Soko
"Depression is merely anger without enthusiasm." - Anonymous
Also, their statement on the Chiaro Networks "OptIPuter" is here. Caltech is an entirely different animal.
"Prepare for the worst - hope for the best."
Just as the article started to pique my interests, it was over. That sucks!
Yet another technology article written without any real information. I realize in writing you are supposed to write to the common reader, but sometimes it seems like they would be better off not writing about it at all if they didn't intend on clueing us in on any of the facts.
A slip of the foot you may soon recover, but a slip of the tongue you may never get over. -Benjamin Franklin
Yay for free subscriptions.. here are some other sources for similar reportings that don't require evil subscriptions.
The idea of optical routing is that, even in typical gigabit or any optical based networking media, the bottleneck is the processors in the routers. This is because the light must be converted to electrical signals, and then routing decisions and switching are done on the processor of the router. After being processed, the signals are converted back to optical to be sent out the appropriate port.
Optical switching means that the light coming in on fiber from different devices is never converted to electrical to be routed. The actual light signals are switched from port to port. This was originally planned to be done with very small mirrors! (no joke!) which would aim incoming light to the corresponding outgoing port.
According to the whitepaper on Chiaro's website, they have found a way to avoid the mirrors (which have an obvious bottleneck themselves, as well as potential mechanical failure) and they are able to multiplex or switch the light based on applying an electrical field to some of the optical components which them changes the angle and therefore the destination of the light.
Most of the key people at Chiaro are people who jumped ship from Convex Computer after they were acquired by Hewlett-Packard back in the mid-90s. Convex's claim to fame was to have invented and productized the first mini-supercomputer hitting the sweet-spot between the biggest vax and the smallest cray and they were very successful for about a decade.
Larry Smarr, of UIUC's supercomputing center (aka the place where Mosaic was developed) has always been a big fan of the Convex crowd.
Another bit of trivia - Jeff Christenson, of PERL fame is a convex alum as well as Dave Taylor of Id Software fame and a whole host of other key people now scattered about the world.
When information is power, privacy is freedom.
The innovation has nothing to do with the external connections.
The interesting thing about this switch is that, internally, it routes photons instead of electrons.
Once it sets up a connection, e.g. port-5 to port 17, the photons can "just go". In other words, there are no capacitors(wires) and gates(transistors) to slow things down.
Because the previous attempt to implement a campus wide supercomputer using an RFC 1149 based network caused the pigeons to burst into flames.
i am the cl-itit commander. no one rules the cl-itit like me. not this little fucker, not any of you little fuckers...
The pure optical IP or ATM router is still years away. Optical computing isn't up to optical packet decode and route lookup. Optical buffering isn't ready, either, although you could potentially store packets temporarily in a fibre delay line.